JP6869436B2 - Aerosol generator and method and program to operate it - Google Patents

Description

The present disclosure relates to an aerosol generator that generates an aerosol to be sucked by the user, and a method and program for operating the aerosol generator.

In aerosol generators for producing aerosols that the user sucks, such as general e-cigarettes, heat-not-burn tobacco, and nebulizers, the user can use them when there is a shortage of aerosol sources that become aerosols when atomized. When suction is performed, sufficient aerosol cannot be supplied to the user. In addition, in the case of electronic cigarettes and heat-not-burn tobacco, there is a problem that aerosols having an unintended flavor can be released.

As a solution to this problem, Patent Document 1 discloses a technique for detecting the depletion of an aerosol source based on the time required for the heater temperature to drop from one temperature to another when cooling the heater. There is. Patent Documents 2 to 5 also disclose various techniques that may contribute to solving the above-mentioned problems or to solve the above-mentioned problems.

These technologies are under development. There is a need for technology that can observe the cooling process of the heater of the aerosol generator with low cost and high accuracy, and technology that can detect the shortage or depletion of the aerosol source in the aerosol generator with low cost and high accuracy. Has been done. The cooling process of the heater is affected by the state of the aerosol generator. Therefore, since the state of the aerosol generator can be known by observing the cooling process of the heater, a technique capable of observing the cooling process of the heater of the aerosol generator with low cost and high accuracy is also required. There is.

International Publication No. 2017/185355 International Publication No. 2017/185356 International Publication No. 2017/024477 International Publication No. 2017/144191 International Publication No. 2017/084818

The present disclosure has been made in view of the above points.

The first problem to be solved by the present disclosure is that the cooling process of the heater can be observed at low cost and with high accuracy, and further, the shortage or depletion of the aerosol source can be detected at low cost and with high accuracy. , Provide an aerosol generator and methods and programs for operating it.

A second problem to be solved by the present disclosure is to provide an aerosol generator and a method and a program for operating the aerosol generator, which can detect the shortage or depletion of the aerosol source at low cost and with high accuracy.

A third problem to be solved by the present disclosure is to provide an aerosol generator and a method and a program for operating the aerosol generator, which can detect the shortage or depletion of the aerosol source at low cost and with high accuracy.

In order to solve the first problem described above, according to the first embodiment of the present disclosure, the aerosol base material holding the aerosol source or the aerosol source and the heat generated by the power supply from the power source are used. A load that atomizes an aerosol source and whose electrical resistance value changes according to temperature, a sensor that detects the electrical resistance value of the load or an electrical value related to electrical resistance, and a sensor that detects it. Based on the time-series change of the value, the cooling process of the load after the load has risen to a temperature higher than the temperature at which the aerosol source can be atomized is time-series of the value detected by the sensor. Provided is an aerosol generator comprising a control unit configured to monitor in such a manner that the change and the decrease in temperature of the load maintain a correlation.

In one embodiment, the control unit is configured to control power supply from the power source to the load based on a requirement for aerosol production. Of the time from the end of the power supply to the start of monitoring of the cooling process, and the cycle in which the sensor detects the value of the electric resistance or the electric value related to the electric resistance during the monitoring of the cooling process. At least one is greater than the minimum achievable by the control unit.

In one embodiment, the control unit is configured to determine the occurrence of depletion of the aerosol source in the reservoir or aerosol substrate based on the cooling process.

In one embodiment, the control unit provides a dead zone in which the cooling process is not monitored or the occurrence of the depletion based on the monitored cooling process is not determined at the start or immediately after the start of the cooling process. It is composed.

In one embodiment, the control unit is configured to control power supply from the power source to the load based on a requirement for aerosol production. The dead zone is provided until at least one of the residual current and the surge current generated at the end of the power supply becomes equal to or less than the threshold value.

In one embodiment, the length of time in the dead zone is shorter than the length of time it takes for the cooling process to complete if the aerosol source is not depleted.

In one embodiment, the control unit controls the power supply from the power supply to the load based on the request for aerosol generation, and at least one of the residual current and the surge current generated at the end of the power supply is equal to or less than the threshold value. The sensor is configured to detect a value associated with the electrical resistance value during monitoring of the cooling process at a period longer than the time required to become.

In one embodiment, the control unit is configured to stepwise shorten the cycle of detecting the value of the electrical resistance or the electrical value associated with the electrical resistance by the sensor during monitoring of the cooling process. ..

In one embodiment, the control unit is associated with the value of the electrical resistance or the electrical resistance by the sensor during monitoring of the cooling process as the temperature of the load corresponding to the value detected by the sensor is lower. It is configured to shorten the cycle for detecting electrical values.

In one embodiment, the control unit corrects the value detected by the sensor at the start or immediately after the start of the cooling process by smoothing a time-series change in the value detected by the sensor. , The cooling process is configured to be monitored based on the corrected value.

In one embodiment, the control unit is configured to use at least one of an averaging process and a low-pass filter to correct the value detected by the sensor.

In one embodiment, the control unit is configured to determine the occurrence of exhaustion of the aerosol source based on the cooling process until the value detected by the sensor reaches a steady state.

In one embodiment, the control unit controls the power supply from the power supply to the load based on the request for aerosol generation, the value detected by the sensor before the power supply is executed, and the cooling process. It is configured to determine whether the value detected by the sensor has reached a steady state based on the comparison with the value detected by the sensor.

In one embodiment, the control unit is detected by the sensor based on a comparison between a value detected by the sensor corresponding to a temperature corresponding to a temperature higher than room temperature by a predetermined value and a value detected by the sensor in the cooling process. Is configured to determine if the value has reached a steady state.

In one embodiment, the default value is greater than the error in the temperature of the load obtained from the value detected by the sensor due to the error in the sensor.

In one embodiment, the control unit is configured to determine whether the value detected by the sensor has reached a steady state based on the time derivative of the value detected by the sensor.

In one embodiment, the control unit is configured to determine whether the value detected by the sensor has reached a steady state based on the deviation or variance of the value detected by the sensor.

Further, according to the first embodiment of the present disclosure, there is a method of operating an aerosol generator, which is a step of atomizing an aerosol source by heat generation due to power supply to a load whose electric resistance value changes according to temperature. Above the temperature at which the aerosol source can be atomized based on the step of detecting the value of the electrical resistance of the load or the electrical value associated with the electrical resistance and the time-series changes in the detected value. A method comprising the step of monitoring the cooling process after the load has risen up to, in such a manner that the time-series change in the value detected by the sensor and the decrease in the temperature of the load maintain a correlation. Is provided.

Further, according to the first embodiment of the present disclosure, the aerosol source is atomized by the storage unit for storing the aerosol source or the aerosol base material holding the aerosol source, and the heat generated by the power supply from the power source, and the aerosol source is brought to a temperature. Based on a load whose electrical resistance value changes accordingly, a sensor that detects the value of the electrical resistance of the load or an electrical value related to the electrical resistance, and a time-series change in the value detected by the sensor. Provided is an aerosol generator comprising a control unit configured to monitor the cooling process after the load has risen above a temperature at which the aerosol source can be atomized. The control unit performs the cooling process at a timing at which the temperature of the load does not deviate from the value of the electric resistance or the electric value related to the electric resistance, or at a frequency that does not interfere with the cooling of the load in the cooling process. The sensor is configured to detect the value during monitoring.

Further, according to the first embodiment of the present disclosure, there is a method of operating an aerosol generator, which comprises a step of atomizing an aerosol source by generating heat due to power supply to a load whose electric resistance value changes according to temperature. Above the temperature at which the aerosol source can be atomized based on the step of detecting the value of the electrical resistance of the load or the electrical value associated with the electrical resistance and the time-series changes in the detected value. Including the step of monitoring the cooling process after the load has risen up to, the timing at which the temperature of the load and the value of the electric resistance or the electric value related to the electric resistance do not deviate, or in the cooling process. A method is provided in which the value is detected during monitoring of the cooling process at a frequency that does not interfere with the cooling of the load.

Further, according to the first embodiment of the present disclosure, the aerosol source is atomized by the storage unit for storing the aerosol source or the aerosol base material holding the aerosol source, and the heat generated by the power supply from the power source, and the temperature is increased. Based on a load whose electrical resistance value changes according to the load, a sensor that detects the value of the electrical resistance of the load or an electrical value related to the electrical resistance, and a time-series change in the value detected by the sensor. Provided is an aerosol generator comprising a control unit configured to monitor the cooling process after the load has risen to a temperature above which the aerosol source can be atomized. In the cooling process, the control unit changes the value detected by the sensor at the start of cooling of the load or immediately after the start of cooling and before the load reaches room temperature over time. Based on the above, it is configured to determine the occurrence of depletion of the aerosol source in the reservoir.

In one embodiment, the control unit determines whether the value detected by the sensor has reached a steady state based on the value detected by the sensor or the time-series change of the value, and detects the value by the sensor. It is configured to determine the occurrence of the depletion based on the cooling process until the value to be determined reaches a steady state.

Further, according to the first embodiment of the present disclosure, there is a method of operating an aerosol generator, which is a step of atomizing an aerosol source by heat generation due to power supply to a load whose electric resistance value changes according to temperature. Above the temperature at which the aerosol source can be atomized based on the step of detecting the value of the electrical resistance of the load or the electrical value associated with the electrical resistance and the time-series changes in the detected value. A method is provided that includes a step of monitoring the cooling process after the load has risen to. In the cooling process, the aerosol source is based on a time-series change in the detected value at the start of cooling of the load or immediately after the start of cooling and before the load reaches room temperature. The occurrence of depletion is judged.

Also, according to the first embodiment of the present disclosure, there is provided a program that, when executed by a processor, causes the processor to perform any of the methods described above.

In order to solve the above-mentioned second problem, according to the second embodiment of the present disclosure, the aerosol base material holding the aerosol source or the aerosol source and the heat generated by the power supply from the power source are used. A load that atomizes the aerosol source, a sensor that outputs values related to the temperature of the load, and the sensor in the cooling process after the load has risen to a temperature above which the aerosol source can be atomized. Provided is an aerosol generator comprising a control unit configured to determine the occurrence of depletion of the aerosol source in the reservoir or the aerosol substrate based on the cooling rate derived from the output value of.

In one embodiment, in the cooling process, the difference between the cooling rate when the aerosol source is depleted and the cooling rate when the depletion does not occur is equal to or greater than the threshold value. It is configured to determine the occurrence of the depletion based on the cooling rate in the time zone.

In one embodiment, the control unit determines the occurrence of the depletion based on the cooling rate in the time zone in which the temperature of the load belongs to the temperature range that can be reached only when the depletion occurs in the cooling process. It is configured to do.

In one embodiment, the control unit derives the cooling rate from the plurality of output values of the sensor, and sets the earliest value among the plurality of output values of the sensor on the time axis in the cooling process. It is configured to be acquired in the time zone in which the temperature of the load belongs to the temperature range that can be reached only when the depletion occurs.

In one embodiment, the control unit acquires a plurality of output values of the sensor in a time zone in which the temperature of the load belongs to a temperature range that can be reached only when the depletion occurs in the cooling process. It is composed.

In one embodiment, the load changes its electrical resistance value according to the temperature, and the sensor outputs a value related to the electrical resistance value as a value related to the temperature of the load.

In one embodiment, the control unit is configured to provide a dead zone in which a value relating to the electrical resistance value is not acquired by the sensor or the cooling rate is not derived at the start or immediately after the start of the cooling process. Alternatively, the control unit determines the cooling rate based on the output value of the sensor at the start or immediately after the start of the cooling process, which is corrected so that the time-series change of the output value of the sensor is smoothed. It is configured to derive.

In one embodiment, the control unit is configured to control the power supply from the power source to the load so that the power supplied from the power source to the load is gradually reduced or gradually reduced before the cooling process. Will be done.

In one embodiment, the control unit is configured to control power supply from the power source to the load based on a requirement for aerosol production. The dead zone is provided so as to continue until at least one of the residual current and the surge current generated at the end of the power feeding becomes equal to or less than the threshold value.

In one embodiment, the dead zone is shorter than the length at which the cooling process is completed if the depletion has not occurred.

In one embodiment, the aerosol generator is further connected in series between the power supply and the load, a first circuit having a first switch, and in series between the power supply and the load, said first. It includes a second circuit which is connected in parallel with a circuit, has a second switch, and has a larger electric resistance value than the first circuit. The control unit controls the first switch and the second switch, and the sensor of the sensor while only the second switch of the first switch and the second switch is turned on. It is configured to derive the cooling rate based on the output value.

In one embodiment, the control unit is configured to turn on the second switch immediately prior to the cooling process.

In one embodiment, at least one of the time from the end of the power supply to the start of acquisition of the value related to the electric resistance value by the sensor and the cycle in which the sensor acquires the value related to the electric resistance value is the control. The part is greater than the minimum achievable value.

Further, according to the second embodiment of the present disclosure, in the method of operating the aerosol generator, the step of atomizing the aerosol source by the heat generated by the power supply to the load and the value related to the temperature of the load are set. Depletion of the aerosol source based on the step of detection and the cooling rate derived from the detected value in the cooling process after the load has risen above a temperature at which the aerosol source can be atomized. Methods are provided, including, with steps to determine the occurrence.

Also, according to a second embodiment of the present disclosure, there is provided a program that causes the processor to perform the above method when executed by the processor.

In order to solve the above-mentioned third problem, according to the third embodiment of the present disclosure, the aerosol base material holding the aerosol source or the aerosol source and the heat generated by the power supply from the power source are used. It is related to a load whose physical properties change when the aerosol source is atomized and heated at a temperature that can be reached only when the aerosol source is depleted in the reservoir or the aerosol substrate, and the physical properties of the load. A sensor that outputs a value and a control unit configured to determine the occurrence of the depletion based on the output value of the sensor after the load has risen to a temperature higher than the temperature at which the aerosol source can be atomized. Aerosol generators, including, are provided.

In one embodiment, the control unit causes the depletion based on a steady value, which is the output value of the sensor in a steady state after the load has risen to a temperature above which the aerosol source can be atomized. Is configured to judge.

In one embodiment, the control unit is configured to be able to acquire a request for aerosol production and to acquire the steady-state value upon acquisition of the request.

In one embodiment, the control unit determines the occurrence of the depletion based on the amount of change in the output value of the sensor before and after raising the load to a temperature higher than the temperature at which the aerosol source can be atomized. It is composed.

In one embodiment, the control unit determines the occurrence of the depletion based on the difference in the output value of the sensor in the steady state before and after raising the load to a temperature higher than the temperature at which the aerosol source can be atomized. It is configured to do.

In one embodiment, the control unit of the aerosol source due to the load until the output value of the sensor reaches a steady state after the load has risen to a temperature equal to or higher than the temperature at which the aerosol source can be atomized. It is configured to prohibit atomization.

In one embodiment, the control unit determines the output value of the sensor before reaching a steady state and the depletion in the cooling process after the load has risen to a temperature equal to or higher than the temperature at which the aerosol source can be atomized. Based on the comparison with the value obtained by adding the default value to the value related to the physical characteristics of the load in the steady state when the steady state occurs, or the value obtained by subtracting the default value from the output value of the sensor before reaching the steady state. , The occurrence of the depletion is determined based on the comparison with the value related to the physical properties of the load in the steady state when the depletion occurs.

In one embodiment, the load has an electrical resistance value that changes depending on the temperature. The sensor outputs a value related to the electric resistance value of the load as a value related to the physical characteristics of the load.

In one embodiment, the control unit determines the output value of the sensor after the load has risen to a temperature equal to or higher than the temperature at which the aerosol source can be atomized, and when a protective film is formed on the surface of the load. It is configured to determine the occurrence of the depletion based on the comparison with the value related to the resistance value of the load.

In one embodiment, the control unit determines the amount of change in the output value of the sensor before and after raising the temperature of the load to a temperature equal to or higher than the temperature at which the aerosol source can be atomized, and the formation of a protective film on the surface of the load. It is configured to determine the occurrence of the depletion based on the comparison with the amount of change in the value related to the resistance value of the load.

In one embodiment, the load comprises a metal having a redox potential less than or equal to the redox potential of copper.

In one embodiment, the load has no passivation coating.

In one embodiment, the load comprises NiCr.

In one embodiment, the aerosol generator is further connected in series between the power supply and the load, a first circuit having a first switch, and in series between the power supply and the load, said first. It includes a second circuit which is connected in parallel with a circuit, has a second switch, and has a larger electric resistance value than the first circuit. The control unit controls the first switch and the second switch, and the sensor of the sensor while only the second switch of the first switch and the second switch is turned on. It is configured to determine the occurrence of the depletion based on the output value.

Further, according to the third embodiment of the present disclosure, it is a method of operating an aerosol generator including a load whose physical properties change when heated at a temperature that can be reached only when the aerosol source is depleted. Occurrence of exhaustion of the aerosol source based on the step of detecting a value related to the physical characteristics of the load and the detected value after the load has been warmed to a temperature above which the aerosol source can be atomized. Methods are provided, including, and steps to determine.

Also, according to a third embodiment of the present disclosure, there is provided a program that, when executed by a processor, causes the processor to perform the method described above.

According to the first embodiment of the present disclosure, the cooling process of the heater can be observed at low cost and with high accuracy, and further, the shortage or depletion of the aerosol source can be detected at low cost and with high accuracy. Aerosol generators and methods and programs for operating them can be provided.

According to the second embodiment of the present disclosure, it is possible to provide an aerosol generator and a method and a program for operating the aerosol generator, which can detect the shortage or depletion of the aerosol source at low cost and with high accuracy.

According to the third embodiment of the present disclosure, it is possible to provide an aerosol generator and a method and a program for operating the aerosol generator, which can detect the shortage or depletion of the aerosol source at low cost and with high accuracy.

It is a schematic block diagram of the structure of the aerosol generation apparatus by one Embodiment of this disclosure. It is a schematic block diagram of the structure of the aerosol generation apparatus by one Embodiment of this disclosure. It is a figure which shows the exemplary circuit structure with respect to a part of the aerosol generation apparatus by one Embodiment of this disclosure. The cooling process of the load after the power supply to the load is stopped is schematically shown for each of the cases where the aerosol source in the reservoir or the aerosol base material is sufficient and the aerosol source is depleted. It is a flowchart of the process for monitoring the cooling process of a load and determining whether or not an aerosol source is depleted according to one embodiment of the present disclosure. It is shown that the resistance value of the measured load can fluctuate greatly due to the generation of surge current. It is a flowchart which shows the process by one Embodiment of this disclosure. The embodiments of the present disclosure for reducing the influence of the generation of surge current are conceptually shown. FIG. 7 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. 7. An embodiment of the present disclosure for reducing the influence of the generation of surge current is conceptually shown. 9 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. The measurement timing of the value for monitoring the cooling process of the load according to the embodiment of the present disclosure is conceptually shown. The measurement timing of the value for monitoring the cooling process of the load according to the embodiment of the present disclosure is conceptually shown. It is a flowchart of the process by one Embodiment of this disclosure which is related to FIG. The measurement timing of the value for monitoring the cooling process of the load according to the embodiment of the present disclosure is conceptually shown. It is a flowchart of the process by one Embodiment of this disclosure which is related to FIG. The process of supplying power to the load and cooling the load after the power supply is stopped according to one embodiment of the present disclosure is schematically shown. FIG. 6 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. A method for monitoring the load cooling process according to the embodiment of the present disclosure is conceptually shown. FIG. 8 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. A method for monitoring the load cooling process according to the embodiment of the present disclosure is conceptually shown. It is a flowchart of the process by one Embodiment of this disclosure which is related to FIG. It is a flowchart of the process by one Embodiment of this disclosure which is related to FIG. It is a graph which shows roughly the cooling process of a load after stopping the power supply to a load in an aerosol generation apparatus. It is a figure which shows the cooling rate of an actual load. It is a figure explaining the timing suitable for measuring the cooling rate of a load. It is a flowchart of the process which detects the exhaustion of an aerosol source by one Embodiment of this disclosure. It is a flowchart of the process which detects the exhaustion of an aerosol source by one Embodiment of this disclosure. The circuit provided in the aerosol generator according to one embodiment of the present disclosure is schematically shown. A method for determining the occurrence of aerosol source depletion according to one embodiment of the present disclosure is conceptually shown. FIG. 29 is a flowchart of processing according to an embodiment of the present disclosure, which is related to FIG. It is a table which shows the redox potential of various metals which can be used for manufacturing a load, and the easiness of forming an oxide film. A method for determining the occurrence of aerosol source depletion according to one embodiment of the present disclosure is conceptually shown. FIG. 32 is a flowchart of processing according to an embodiment of the present disclosure, which is related to FIG. 32. A method for determining the occurrence of aerosol source depletion according to one embodiment of the present disclosure is conceptually shown. FIG. 32 is a flowchart of processing according to an embodiment of the present disclosure, which is related to FIG. 32.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The embodiments of the present disclosure include, but are not limited to, electronic cigarettes, heat-not-burn tobacco and nebulizers. Embodiments of the present disclosure may include various aerosol generators for producing aerosols that the user sucks.

FIG. 1A is a schematic block diagram of the configuration of the aerosol generator 100A according to the embodiment of the present disclosure. FIG. 1A schematically and conceptually shows each component included in the aerosol generator 100A, and does not show the exact arrangement, shape, dimensions, positional relationship, etc. of each component and the aerosol generator 100A. Please note.

As shown in FIG. 1A, the aerosol generator 100A includes a first member 102 (hereinafter referred to as “main body 102”) and a second member 104A (hereinafter referred to as “cartridge 104A”). As shown, as an example, the main body 102 may include a control unit 106, a notification unit 108, a power supply 110, a sensor 112, and a memory 114. The aerosol generator 100A may include sensors such as a flow rate sensor, a pressure sensor, a voltage sensor, an electric resistance sensor, and a temperature sensor, and these are collectively referred to as a “sensor 112” in the present disclosure. The main body 102 may also include a circuit 134 described later. As an example, the cartridge 104A may include a storage section 116A, an atomizing section 118A, an air intake flow path 120, an aerosol flow path 121, a mouthpiece 122, a holding section 130 and a load 132. A part of the components contained in the main body 102 may be contained in the cartridge 104A. A part of the components contained in the cartridge 104A may be contained in the main body 102. The cartridge 104A may be configured to be detachable from the main body 102. Alternatively, all the components contained in the main body 102 and the cartridge 104A may be contained in the same housing instead of the main body 102 and the cartridge 104A.

The reservoir 116A may be configured as a tank for accommodating the aerosol source. In this case, the aerosol source is, for example, a polyhydric alcohol such as glycerin or propylene glycol, or a liquid such as water. When the aerosol generator 100A is an electronic cigarette, the aerosol source in the reservoir 116A may include a tobacco raw material or an extract derived from the tobacco raw material that releases a flavor component by heating. The holding unit 130 holds the aerosol source. For example, the holding portion 130 is made of a fibrous or porous material, and holds an aerosol source as a liquid in the gaps between the fibers and the pores of the porous material. For the fibrous or porous material described above, for example, cotton, glass fiber, tobacco raw material, or the like can be used. If the aerosol generator 100A is a medical inhaler such as a nebulizer, the aerosol source may also include a drug for the patient to inhale. As another example, the reservoir 116A may have a configuration capable of replenishing the consumed aerosol source. Alternatively, the reservoir 116A may be configured so that the reservoir 116A itself can be replaced when the aerosol source is consumed. Further, the aerosol source is not limited to a liquid, and may be a solid. When the aerosol source is a solid, the reservoir 116A may be a hollow container.

The atomizing unit 118A is configured to atomize an aerosol source to produce an aerosol. When the suction operation is detected by the sensor 112, the atomizing unit 118A generates an aerosol. For example, the suction operation may be detected by a flow rate sensor or a flow velocity sensor. In this case, if the absolute value and the amount of change of the flow rate and the flow velocity of the air in the air intake flow path 120 generated by the user holding and sucking the mouthpiece 122 satisfy the predetermined conditions, the flow rate sensor and the flow velocity sensor can be used. The suction operation may be detected. Further, for example, the suction operation may be detected by a pressure sensor. In this case, the pressure sensor may detect the suction operation if a predetermined condition is satisfied, such as a negative pressure in the air intake flow path 120 when the user holds the suction port 112 and sucks the air. The flow rate sensor, the flow velocity sensor, and the pressure sensor only output the flow rate, the flow velocity, and the pressure in the air intake flow path 120, respectively, and the control unit 106 may detect the suction operation based on the outputs.

Further, for example, by using a push button, a touch panel, an acceleration sensor, or the like, the atomizing unit 118A may generate an aerosol without detecting the suction operation or waiting for the detection of the suction operation, or fog. The chemical unit 118A may receive power from the power supply 110. With such a configuration, for example, even when the heat capacity of the holding unit 130 or the load 132 constituting the atomizing unit 118A or the aerosol source itself is large, the mist is formed at the timing when the user actually sucks the aerosol. The chemical conversion unit 118A can appropriately generate an aerosol. The sensor 112 may include a sensor that detects an operation on a push button or a touch panel, or an acceleration sensor.

For example, the holding unit 130 is provided so as to connect the storage unit 116A and the atomizing unit 118A. In this case, a part of the holding portion 130 communicates with the inside of the storage portion 116A and comes into contact with the aerosol source. The other part of the holding portion 130 extends to the atomizing portion 118A. The other part of the holding portion 130 extending to the atomizing portion 118A may be housed in the atomizing portion 118A, or may be passed through the atomizing portion 118A and passed through the storage portion 116A again. .. The aerosol source is carried from the reservoir 116A to the atomizing section 118A by the capillary effect of the holding section 130. As an example, the atomizing unit 118A includes a heater including a load 132 electrically connected to the power supply 110. The heater is arranged so as to be in contact with or in close proximity to the holding portion 130. When the suction operation is detected, the control unit 106 controls the heater of the atomizing unit 118A or the power supply to the heater, and atomizes the aerosol source by heating the aerosol source carried through the holding unit 130. .. Another example of the atomizing unit 118A may be an ultrasonic atomizer that atomizes an aerosol source by ultrasonic vibration. An air intake flow path 120 is connected to the atomizing portion 118A, and the air intake flow path 120 leads to the outside of the aerosol generator 100A. The aerosol produced in the atomizing section 118A is mixed with the air taken in through the air intake flow path 120. The mixed fluid of aerosol and air is pumped into the aerosol flow path 121, as indicated by arrow 124. The aerosol flow path 121 has a tubular structure for transporting a mixed fluid of aerosol and air generated in the atomizing portion 118A to the mouthpiece 122.

The mouthpiece 122 is located at the end of the aerosol flow path 121, and is configured to open the aerosol flow path 121 to the outside of the aerosol generation device 100A. The user takes in the air containing the aerosol into the oral cavity by sucking the mouthpiece 122 by holding it.

The notification unit 108 may include a light emitting element such as an LED, a display, a speaker, a vibrator, and the like. The notification unit 108 is configured to give some notification to the user by light emission, display, vocalization, vibration, or the like, if necessary.

The power supply 110 supplies power to each component of the aerosol generator 100A, such as the notification unit 108, the sensor 112, the memory 114, the load 132, and the circuit 134. The power supply 110 may be charged by connecting to an external power source via a predetermined port (not shown) of the aerosol generator 100A. Only the power supply 110 may be removed from the main body 102 or the aerosol generator 100A or may be replaced with a new power supply 110. Further, the power supply 110 may be replaced with a new power supply 110 by replacing the entire main body 102 with a new main body 102.

The sensor 112 may include one or more sensors used to obtain a value of voltage applied to the whole or a specific part of the circuit 134, a value of resistance of the load 132, a value of temperature, and the like. The sensor 112 may be incorporated in the circuit 134. The function of the sensor 112 may be incorporated in the control unit 106. The sensor 112 may also include a pressure sensor that detects pressure fluctuations in the air intake flow path 120 and / or the aerosol flow path 121 or a flow rate sensor that detects the flow rate. The sensor 112 may also include a weight sensor that detects the weight of a component such as the reservoir 116A. The sensor 112 may also be configured to count the number of puffs by the user using the aerosol generator 100A. The sensor 112 may also be configured to integrate the energization time on the atomizing section 118A. The sensor 112 may also be configured to detect the height of the liquid level in the reservoir 116A. The control unit 106 and the sensor 112 may also be configured to obtain or detect the SOC (State of Charge, charging state), current integrated value, voltage, etc. of the power supply 110. The SOC may be determined by a current integration method (Coulomb counting method), an SOC-OCV (Open Circuit Voltage) method, or the like. The sensor 112 may also be a user-operable operation button or the like.

The control unit 106 may be an electronic circuit module configured as a microprocessor or a microcomputer. The control unit 106 may be configured to control the operation of the aerosol generator 100A according to a computer executable instruction stored in the memory 114. The memory 114 is a storage medium such as a ROM, RAM, or flash memory. In addition to the computer-executable instructions as described above, the memory 114 may store setting data and the like necessary for controlling the aerosol generator 100A. For example, the memory 114 is a control program of the notification unit 108 (modes such as light emission, vocalization, vibration, etc.), a control program of the atomization unit 118A, a value acquired and / or detected by the sensor 112, and heating of the atomization unit 118A. Various data such as history may be stored. The control unit 106 reads data from the memory 114 as needed and uses it for controlling the aerosol generator 100A, and stores the data in the memory 114 as needed.

FIG. 1B is a schematic block diagram of the configuration of the aerosol generator 100B according to the embodiment of the present disclosure.

As shown, the aerosol generator 100B has a configuration similar to that of the aerosol generator 100A of FIG. 1A. However, the configuration of the second member 104B (hereinafter referred to as "aerosol generating article 104B" or "stick 104B") is different from the configuration of the first member 104A. As an example, the aerosol generating article 104B may include an aerosol base material 116B, an atomizing portion 118B, an air intake flow path 120, an aerosol flow path 121, and a mouthpiece portion 122. A part of the components contained in the main body 102 may be contained in the aerosol generating article 104B. A part of the components contained in the aerosol-generating article 104B may be contained in the main body 102. The aerosol-generating article 104B may be configured to be removable with respect to the main body 102. Alternatively, all the components contained in the main body 102 and the aerosol-generating article 104B may be contained in the same housing instead of the main body 102 and the aerosol-generating article 104B.

The aerosol substrate 116B may be configured as a solid carrying an aerosol source. As in the case of the reservoir 116A of FIG. 1A, the aerosol source may be, for example, a liquid such as a polyhydric alcohol such as glycerin or propylene glycol, or water. The aerosol source in the aerosol base material 116B may contain a tobacco raw material or an extract derived from the tobacco raw material that releases a flavor component by heating. If the aerosol generator 100A is a medical inhaler such as a nebulizer, the aerosol source may also include a drug for the patient to inhale. The aerosol substrate 116B may be configured such that the aerosol substrate 116B itself can be replaced when the aerosol source is consumed. The aerosol source is not limited to liquids, but may be solids.

The atomizing unit 118B is configured to atomize an aerosol source to produce an aerosol. When the suction operation is detected by the sensor 112, the atomizing unit 118B generates an aerosol. The atomizing unit 118B includes a heater (not shown) including a load electrically connected to the power supply 110. When the suction operation is detected, the control unit 106 controls the heater of the atomizing unit 118B or the power supply to the heater, and atomizes the aerosol source by heating the aerosol source supported in the aerosol base material 116B. To become. Another example of the atomizing unit 118B may be an ultrasonic atomizer that atomizes an aerosol source by ultrasonic vibration. An air intake flow path 120 is connected to the atomization unit 118B, and the air intake flow path 120 leads to the outside of the aerosol generator 100B. The aerosol produced in the atomizing section 118B is mixed with the air taken in through the air intake flow path 120. The mixed fluid of aerosol and air is pumped into the aerosol flow path 121, as indicated by arrow 124. The aerosol flow path 121 has a tubular structure for transporting a mixed fluid of aerosol and air generated in the atomizing portion 118B to the mouthpiece 122. In the aerosol generator 100B, the aerosol generating article 104B is configured to be heated from the inside by the atomizing portion 118B located inside the aerosol generating apparatus 100B or inserted into the inside thereof. Alternatively, the aerosol-generating article 104B may be configured to be heated from the outside by an atomizing section 118B configured to surround or contain itself.

The control unit 106 is configured to control the aerosol generators 100A and 100B (hereinafter, collectively referred to as “aerosol generator 100”) according to the embodiment of the present disclosure by various methods.

If the user performs suction when the aerosol source is insufficient in the aerosol generator, sufficient aerosol cannot be supplied to the user. In addition, in the case of e-cigarettes and heat-not-burn tobacco, aerosols with unintended flavors can be released (such a phenomenon is also referred to as "unintended behavior"). The inventors of the present application have invented an aerosol generator that performs appropriate control when an aerosol source is depleted or deficient, and a method and program for operating the aerosol generator. Hereinafter, each embodiment of the present disclosure will be described in detail, mainly assuming that the aerosol generator has the configuration shown in FIG. 1A. However, if necessary, a case where the aerosol generator has the configuration shown in FIG. 1B will also be described. It will be apparent to those skilled in the art that the embodiments of the present disclosure can also be applied when the aerosol generator has various configurations other than those shown in FIGS. 1A and 1B.

<First Embodiment>
FIG. 2 is a diagram showing an exemplary circuit configuration for a part of the aerosol generator 100A according to the first embodiment of the present disclosure.

The circuit 200 shown in FIG. 2 includes a power supply 110, a control unit 106, sensors 112A to D (hereinafter collectively referred to as “sensor 112”), a load 132 (hereinafter also referred to as “heater resistance”), and a first circuit 202. It includes a second circuit 204, a switch Q1 including a first field effect transistor (FET) 206, a conversion unit 208, a switch Q2 including a second FET 210, and a resistor 212 (hereinafter, also referred to as “shunt resistor”). The sensor 112 may be built in other components such as the control unit 106 and the conversion unit 208. For example, by using a PTC (Positive Temperature Cooperative, positive temperature coefficient characteristic) heater or an NTC (Negative Temperature Cooperative, negative temperature coefficient characteristic) heater, the electric resistance value of the load 132 changes according to the temperature. The shunt resistor 212 is connected in series with the load 132 and has a known electrical resistance value. The electrical resistance value of the shunt resistor 212 may be substantially invariant with respect to temperature. The shunt resistor 212 has an electrical resistance value greater than that of the load 132. Depending on the embodiment, the sensors 112C and 112D may be omitted. It will be apparent to those skilled in the art that not only FETs but also various elements such as iGBTs and contactors can be used as switches Q1 and Q2.

The converter 208 is, for example, a switching converter and may include an FET 214, a diode 216, an inductance 218 and a capacitor 220. The control unit 106 may control the conversion unit 208 so that the conversion unit 208 converts the output voltage of the power supply 110 and the converted output voltage is applied to the entire circuit. Further, instead of the step-down switching converter shown in FIG. 2, a step-up switching converter, a buck-boost switching converter, an LDO (Linear DropOut) regulator, or the like may be used. The conversion unit 208 is not an essential component and can be omitted. Further, a control unit (not shown) separate from the control unit 106 may be configured to control the conversion unit 208. The control unit (not shown) may be built in the conversion unit 208.

The circuit 134 shown in FIG. 1A may electrically connect the power supply 110 and the load 132 and include a first circuit 202 and a second circuit 204. The first circuit 202 and the second circuit 204 are connected in parallel to the power supply 110 and the load 132. The first circuit 202 may include switch Q1. The second circuit 204 may include a switch Q2 and a resistor 212 (and optionally a sensor 112D). The first circuit 202 may have a resistance value smaller than that of the second circuit 204. In this example, the sensors 112B and 112D are voltage sensors, respectively, configured to detect voltage values across the load 132 and the resistor 212, respectively. However, the configuration of the sensor 112 is not limited to this. For example, the sensor 112 may be a current sensor using a known resistor or a Hall element, and may detect the value of the current flowing through the load 132 and / or the resistor 212.

As shown by the dotted arrow in FIG. 2, the control unit 106 can control the switch Q1, the switch Q2, and the like, and can acquire the value detected by the sensor 112. Even if the control unit 106 is configured to function the first circuit 202 by switching the switch Q1 from the off state to the on state, and to function the second circuit 204 by switching the switch Q2 from the off state to the on state. Good. The control unit 106 may be configured so that the first circuit 202 and the second circuit 204 function alternately by alternately switching the switches Q1 and Q2.

The first circuit 202 is used for atomizing the aerosol source. When the switch Q1 is switched to the ON state and the first circuit 202 functions, power is supplied to the heater (that is, the load 132 in the heater), and the load 132 is heated. By heating the load 132, the aerosol source held in the holding portion 130 in the atomizing portion 118A (in the case of the aerosol generator 100B in FIG. 1B, the aerosol source supported on the aerosol base material 116B) is atomized and the aerosol Is generated.

The second circuit 204 obtains the value of the voltage applied to the load 132, the value related to the resistance value of the load 132, the value related to the temperature of the load 132, the value of the voltage applied to the resistor 212, and the like. Used. As an example, consider the case where the sensors 112B and 112D are voltage sensors, as shown in FIG. When switch Q2 is on and second circuit 204 is functioning, current flows through switch Q2, resistor 212 and load 132. The sensors 112B and 112D provide the value of the voltage applied to the load 132 and / or the value of the voltage applied to the resistor 212, respectively. Further, the value of the voltage applied to the resistor 212 acquired by the sensor 112D and the known resistance value R _shunt of the resistor 212 can be used to obtain the value of the current flowing through the load 132. Since the total value of the resistance values of the resistor 212 and the load 132 can be obtained based on _{the output voltage V out} of the conversion unit 208 _{and the current value, the known resistance value R shunt} can be subtracted from the total value. The resistance value R _HTR of the load 132 can be obtained. When the load 132 has a positive or negative temperature coefficient characteristic in which the resistance value changes depending on the temperature, the previously known relationship between the resistance value of the load 132 and the temperature is determined as described above. The temperature of the load 132 can be estimated based on the resistance value R _{HTR of the load 132.} Those skilled in the art will appreciate that the resistance value and temperature of the load 132 can be estimated by using the value of the current flowing through the resistor 212 instead of the value of the current flowing through the load 132. The value related to the resistance value of the load 132 in this example may include the voltage value, the current value, and the like of the load 132. Specific examples of the sensors 112B and 112D are not limited to voltage sensors and may include other elements such as current sensors (eg, Hall elements).

The sensor 112A detects the output voltage when the power supply 110 is discharged or when there is no load. The sensor 112C detects the output voltage of the conversion unit 208. Alternatively, the output voltage of the conversion unit 208 may be a predetermined target voltage. These voltages are the voltages applied to the entire circuit.

Resistance _{R HTR} load 132 when the temperature of the load 132 is _{T HTR} can be expressed as follows.
R _HTR ( _THTR ) = (V _HTR x R _shunt ) / (V _Batter- V _HTR )
Here, V _Batt is a voltage applied to the entire circuit. When the conversion unit 208 is not used, V _Batt is the output voltage of the power supply 110. When the conversion unit 208 is used, the V _Batt corresponds to the target voltage of the conversion unit 208. V _HTR is the voltage applied to the heater. Instead of the V _HTR , the voltage applied to the shunt resistor 212 may be used.

In FIG. 3, the switch Q1 is turned off to the load 132 (heater) when the aerosol source in the reservoir 116A (or the aerosol base material 116B) is sufficient and when the aerosol source is depleted. The cooling process of the load 132 after the power supply is stopped is shown schematically. The horizontal axis represents time and the vertical axis represents the temperature of the load 132.

Curve 302 shows the cooling curve of the load 132 when the aerosol source is sufficient. As long as there is a sufficient aerosol source, the temperature of the load 132 can be referred to as a certain temperature (hereinafter, "the maximum temperature of the aerosol source that reaches in the normal state" or "aerosol generation temperature" even if the power supply 110 continues to supply power to the load 132. Converges near (call). That is, the temperature of the load 132 when the power supply to the load 132 is stopped is the maximum temperature of the aerosol source that reaches in the normal state. This is a phenomenon that occurs because the thermal energy used for raising the temperature of the load 132 and the aerosol source is used for evaporation (phase transition) of the aerosol source. When the aerosol source is composed of a single solvent, the maximum temperature of the aerosol source reached under normal conditions coincides with the boiling point of the solvent. On the other hand, when the aerosol source is composed of a mixed solvent, the maximum temperature of the aerosol source reached in the normal state changes depending on the composition of various solvents constituting the mixed solvent and their molar ratio. The maximum temperature of the aerosol source reached at normal times in the mixed solvent may be obtained experimentally or analytically using Raoult's law or the like. As an example, as shown in FIG. 3, the temperature of the load 132 when the switch Q1 is turned off and the power supply to the load 132 is stopped is about 200 ° C. The temperature of the load 132 decreases with the passage of time as shown by the curve 302 and reaches room temperature (here, 25 ° C.).

Curve 304 shows the cooling curve of the load 132 when the aerosol source is depleted (or deficient). Since the aerosol source is depleted, when the power supply to the load 132 is stopped, the temperature of the load 132 is higher than the aerosol generation temperature, so that the load 132 is in an overheated state. As an example, as shown in FIG. 3, the temperature of the load 132 can reach 350 ° C. When the power supply is stopped, the temperature of the load 132 decreases with the passage of time as shown by the curve 304, and eventually reaches room temperature.

_RHTR (t = 0) indicates the electric resistance value of the load 132 when the power supply to the load 132 is stopped. _RHTR ( _THTR = RT) indicates the electric resistance value of the load 132 when the temperature of the load 132 reaches room temperature.

As shown in FIG. 3, the time required for the temperature of the load 132 to drop to room temperature when the aerosol source is depleted is that the temperature of the load 132 drops to room temperature when the aerosol source is sufficient. It's longer than it takes. The load 132 is cooled mainly by the air cooling effect, but when the aerosol source is depleted, when the switch Q1 is turned off and the power supply to the load 132 is stopped as compared with when the aerosol source is sufficient. This is because the temperature of the load 132 is high. When the aerosol source is sufficient, the load 132 can be cooled by the aerosol source having a temperature lower than that of the load 132 or the aerosol source newly supplied from the storage unit 116A, which is sufficient when the aerosol source is depleted. It is easy to make a difference in the time required for the temperature of the load 132 to drop to room temperature.

FIG. 4 is a flowchart of a process for monitoring the cooling process of the load 132 and determining whether or not the aerosol source is depleted according to the embodiment of the present disclosure. Here, it is assumed that the control unit 106 executes all the steps. However, it should be noted that some steps may be performed by another component of the aerosol generator 100.

Before the process of FIG. 4, the user's request for aerosol generation continues. The process starts in step 402, and the control unit 106 determines whether or not the aerosol generation request has been completed. As an example, the control unit 106 may determine whether or not the suction by the user is completed based on the output of the pressure sensor or the like. In another example, the control unit 106 determines whether or not the aerosol generation request has been completed based on whether or not the button provided on the aerosol generation device 100 for supplying power to the load 132 is no longer pressed. You may. In another example, a predetermined time has elapsed since the control unit 106 detects an operation on the user interface such as pressing a button provided on the aerosol generator 100 to supply power to the load 132. Based on whether or not, it may be determined whether or not the aerosol generation request has been completed.

If the aerosol production request continues (“N” in step 402), the process returns before step 402. When the aerosol generation request is completed (“Y” in step 402), the process proceeds to step 404. In step 404, the control unit 106 turns off the switch Q1 and stops the power supply to the load 132.

The process proceeds to step 406, and the control unit 106 activates the timer. The control unit 106 may set the value of the timer to the initial value t = 0.

The process proceeds to step 408, and the control unit 106 waits for the time to advance by a predetermined value Δt. As another example, when returning to step 408 from step 416 described later, the control unit 106 may add (increment) to t with the elapsed time from the latest time when step 416 is executed as Δt. ..

The process proceeds to step 410, and the control unit 106 turns on the switch Q2 to make the second circuit 204 function. _{The control unit 106 can measure the electric resistance value R HTR} (t) of the load 132 by the method described in relation to FIG. In step 412, the control unit 106 may acquire the electric resistance value from the sensor that detects the electric resistance value of the load 132. Alternatively, the control unit 106 may obtain the electric resistance value by using the value acquired from the sensor that detects the electric value (current value or the like) related to the electric resistance. Then, in step 414, the control unit 106 turns off the switch Q2.

The process proceeds to step 416, and the control unit 106 determines whether or not _{the value RHTR} (t) obtained in step 412 is equal to the predetermined value _RHTR ( _{THTR = RT).} As shown in FIG. 3, if the load 132 is a PTC heater, the resistance value of the load 132 increases with the passage of time from _{the value R HTR (t = 0) corresponding to the temperature at the time when the switch Q1 is turned off.} It becomes smaller. When the temperature of the load 132 reaches room temperature, the resistance value of the load 132 becomes _{R HTR (T HTR = R.T.} ). Therefore, it is possible to determine whether or not the temperature of the load 132 has dropped to room temperature by the above-mentioned determination regarding the resistance value of the load 132 executed in step 416.

If the resistance value of the load 132 does not reach a predetermined value (“N” in step 416), the process returns before step 408. When the resistance value of the load 132 reaches a predetermined value (“Y” in step 416), the process proceeds to step 418. In step 418, the control unit 106 determines whether or not the value t of the timer at this time (that is, the time elapsed since the switch Q1 is turned off) exceeds a predetermined threshold value Thr. As shown in FIG. 3, Three is the cooling time required for the temperature of the load 132 to drop to room temperature when the aerosol source is sufficient.

If the value of the timer exceeds the threshold value (“Y” in step 418), the process proceeds to step 420. This means that it took time for the temperature of the load 132 to exceed the threshold value Thre before the temperature dropped to room temperature. Therefore, as can be seen from the explanation of FIG. 3, the load 132 is in an overheated state when the switch Q1 is turned off. It is understood that there was. Therefore, in step 420, the control unit 106 determines that the aerosol source is depleted.

If the value of the timer is equal to or less than the threshold value (“N” in step 418), the process proceeds to step 422. In step 422, the control unit 106 determines that the remaining amount of the aerosol source is sufficient.

According to the embodiment of FIG. 4, the cooling process of the load after the load has risen to a temperature above which the aerosol source can be atomized is monitored based on the time-series change of the value detected by the sensor 112. can do. This monitoring is carried out in such a manner that the time-series change of the value detected by the sensor 112 and the decrease in the temperature of the load maintain a correlation. For example, if the load 132 is a PTC heater, the change in the electric resistance value of the load 132 and the temperature of the load 132 have a correlation, and when the temperature of the load 132 decreases with the passage of time, the electric resistance value of the load 132 also decreases. To do. With such a configuration, the cooling process of the load (heater) can be observed with high accuracy without using a dedicated temperature sensor.

Further, according to the embodiment of FIG. 4, the control unit 106 is configured to determine the occurrence of aerosol source depletion in the storage unit 116A or the aerosol base material 116B based on the cooling process. Therefore, it is possible to detect the depletion of the aerosol source in a state where there is little disturbance such as suction by the user.

FIG. 5 shows that the resistance value of the measured load 132 can fluctuate greatly due to the generation of surge current (or residual current). Curve 502 shows the cooling curve of the load 132 when the aerosol source is sufficient. Curve 504 shows the cooling curve of the load 132 when the aerosol source is depleted (or deficient). Reference number 506 indicates the time required for the surge current (or residual current) to settle. Since the circuit 134 has not a little inductor (induction) component, immediately after the switch Q1 is turned off, the current flowing through the first circuit 202 suddenly changes, so that the product of the degree of sudden change in the current (time differential value) and the inductance. A surge current with a magnitude corresponding to is generated. Therefore, if the switch Q2 is turned on and the resistance value of the load 132 is measured immediately after the switch Q1 is turned off, the surge current is superimposed on the current for measuring the resistance value. This causes inconveniences such as a large fluctuation in the resistance value of the measured load 132. In other words, the correlation between the change in the electric resistance value of the load 132 and the temperature of the load 132 described above is not maintained, and there is a possibility that these will deviate from each other. Therefore, it becomes difficult to accurately observe the cooling process of the load 132 and to accurately measure the time required for the temperature of the load 132 to reach room temperature. Since the circuit 134 has not a little capacitor (capacity) component in addition to the inductor component, the residual current flowing through the circuit after the switch Q1 is turned off may cause inconvenience as well as the surge current.

FIG. 6 is a flowchart showing a process according to an embodiment of the present disclosure that can solve the above problems. Since the processes of steps 602 and 604 are the same as the processes of steps 402 and 404 of FIG. 4, the description thereof will be omitted.

In step 606, the control unit 106 stands by with both the switch Q1 and the switch Q2 turned off for a predetermined time (for example, 10 ms). That is, a dead zone is provided at the start of or immediately after the start of the cooling process of the load 132, in which the cooling process is not monitored or the occurrence of depletion is not determined based on the monitored cooling process. The predetermined time at this time may be, for example, the time 506 until the surge current is settled, as shown in FIG. As described above, since the surge current has a magnitude corresponding to the degree of current feeding (time derivative value), it gradually decreases with the passage of time. Similarly, the residual current gradually decreases over time. The information regarding the time may be stored in the memory 114 in advance, or may be variably set according to the output value of the sensor 112. By providing the dead zone, the timing of turning on the switch Q2 is delayed by the predetermined time as shown in FIG. Since the processes of steps 608 to 624 are the same as the processes of steps 406 to 422 of FIG. 4, the description thereof will be omitted. The process of step 608 may be executed before step 606.

According to the embodiment of FIG. 6, the control unit 106 determines whether the cooling process is not monitored at the start or immediately after the start of the cooling process, or the occurrence of aerosol source depletion based on the monitored cooling process. It is configured to provide a dead zone that is not performed. Therefore, it becomes difficult to observe the fluctuation of the output value of the sensor 112 that may occur when the resistance value of the load 132 is measured at the start or immediately after the start of the cooling process, so that the observation accuracy of the cooling process of the load is improved.

The dead zone may be provided until at least one of the residual current and the surge current generated at the end of power supply becomes equal to or less than the threshold value. As an example, the control unit 106 observes electromagnetic noise generated by a residual current or a surge current by a magnetic sensor included in the sensor 112, and based on the magnitude of the noise, at least one of the residual current and the surge current is current. It may be configured to determine the value. As a result, it is possible to prevent the cooling process from being observed in a state where the residual current and the surge current are superimposed on the output value of the sensor 112, so that the observation accuracy is improved.

The length of time in the dead zone may be less than the length of time it takes for the cooling process to complete if the aerosol source is not depleted. As an example, the length of time in the dead zone may be shorter than the length of Thre in FIG. As a result, it is possible to prevent an excessively long dead zone from being set and hindering the observation of the cooling process.

FIG. 7 conceptually illustrates an embodiment of the present disclosure for reducing the effect of the generation of surge current (or residual current). Curve 702 shows the cooling curve of the load 132 when the aerosol source is sufficient. Curve 704 shows the cooling curve of the load 132 when the aerosol source is depleted (or deficient). Reference number 706 indicates the time until the surge current (or residual current) is settled. In this example, the period T is longer than the time required for at least one of the residual current and the surge current generated when the power supply to the load 132 is completed to be equal to or less than the threshold value (the time indicated by the reference number 706). During the monitoring of the cooling process, the sensor 112 detects a value related to the electrical resistance value of the load 132. At the time of the leftmost dotted line (time of surge current generation), the above detection may or may not be performed.

FIG. 8 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. The process of steps 802 to 808 is the same as the process of steps 402 to 408 of FIG.

In step 810, the control unit 106 determines whether or not the time t indicated by the timer is an integral multiple of the above-mentioned period T. If t is not an integral multiple of T (“N” in step 810), processing returns before step 808.

When t is an integral multiple of T (“Y” in step 810), it means that the measurement timing shown by the dotted line in FIG. 7 has been reached. The process proceeds to step 812, the switch Q2 is turned on, and the electrical resistance value of the load 132 or the value related to the electrical resistance is measured. The processes of steps 812 to 824 are the same as the processes of steps 410 to 422 of FIG.

According to the embodiment of FIGS. 7 and 8, the control unit 106 cools at a cycle longer than the time required for at least one of the residual current and the surge current generated at the end of power supply to fall below the threshold value. The sensor 112 is configured to detect a value associated with the electrical resistance value during process monitoring. Therefore, when the resistance value of the load 132 is measured at the start of cooling of the load 132 or immediately after the start of cooling, it becomes difficult to observe the fluctuation of the output value of the sensor 112, so that the observation accuracy of the cooling process is improved.

FIG. 9 conceptually shows an embodiment of the present disclosure for reducing the effect of the generation of surge currents. Curve 902 shows the cooling curve of the load 132 when the aerosol source is sufficient. Curve 904 shows the cooling curve of the load 132 when the aerosol source is depleted (or deficient). In this example, the value detected by the sensor 112 at or immediately after the start of the cooling process is corrected by smoothing the time-series changes in the value. In one example, as shown by a mathematical formula in FIG. 9, the average value of the resistance values of the load 132 measured from one measurement time point to another measurement time point may be determined as the resistance value of the load 132 at that measurement time point. .. For example, in the mathematical formula shown in FIG. 9, where N = 5, the resistance value at the time point corresponding to the last dotted line among the five dotted lines shown in FIG. 9 is five time points including the current time point and the four previous time points. It may be obtained as the average value of the five resistance values measured in. The average value of the resistance values of the loads 132 measured from a certain measurement time point (start point) to another measurement time point (end point) may not be obtained as the end point, but may be obtained as the start point, or may be obtained as the start point. It may be obtained as the time point included between the end points.

FIG. 10 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. The processes of steps 1002 to 1014 are the same as the processes of steps 402 to 414 of FIG.

In step 1016, the control unit 106 increases (increments) a predetermined integer N. The initial value of N may be 0, and the value of N may be increased by 1 in step 1016. This N corresponds to N appearing on the right side of the mathematical formula shown in FIG.

The process proceeds to step 1018, and the control unit 106 determines whether or not N becomes equal to the predetermined threshold value Thr1. In one example, when the average value of the five measured resistance values is used as the resistance value used for control, N = 5.

If N does not reach the threshold (“N” in step 1018), processing returns before step 1008. When N reaches the threshold value (“Y” in step 1018), the process proceeds to step 1020. _{In step 1020, the control unit 106 calculates the Rave} (t) based on, for example, the equation shown in FIG. The process proceeds to step 1022, and the control unit 106 resets N to zero. Subsequent processes of steps 1024 to 1030 are the same as the processes of steps 416 to 422 of FIG.

According to the embodiment of FIGS. 9 and 10, the control unit 106 smoothes the time-series change of the value detected by the sensor 112 at the start or immediately after the start of the cooling process. It is configured to correct by making it and monitor the cooling process based on the corrected value. In the examples of FIGS. 9 and 10, a simple average of a plurality of obtained values is performed, but in another example, a moving average of a plurality of measured values may be obtained. According to these configurations, the exhaustion of the aerosol source can be detected in a state where the influence of disturbance such as suction by the user is small. Further, the control unit 106 may be configured to correct the value detected by the sensor 112 by using at least one of the averaging process and the low-pass filter. As a result, the smoothing process can be realized by a simpler method.

With reference to FIGS. 11 to 15, the appropriate measurement timing of the value for monitoring the cooling process of the load will be described. According to the method of measuring the electric resistance value of the load 132 as described in connection with FIG. 2, the cooling process of the load 132 can be monitored without using a dedicated temperature sensor. However, since it is necessary to energize the circuit 134 in order to measure the electric resistance value of the load 132, the load 132 generates not a little heat due to the current flowing through itself every time the electric resistance value of the load 132 is measured. Therefore, monitoring the load cooling process due to improper measurement timing becomes a disturbance, which may reduce the observation accuracy of the load cooling process.

FIG. 11 conceptually shows the measurement timing of the value for monitoring the cooling process of the load according to the embodiment of the present disclosure. Curve 1102 shows the cooling curve of the load 132 when the aerosol source is sufficient. Curve 1104 shows the cooling curve of the load 132 when the aerosol source is depleted (or deficient). Similar to the embodiment of FIG. 4, the monitoring of the cooling process can be performed in such a manner that the time-series change of the value detected by the sensor 112 and the decrease in the temperature of the load 132 maintain a correlation. For example, if the load 132 is a PTC heater, the change in the electric resistance value of the load 132 and the temperature of the load 132 have a correlation, and when the temperature of the load 132 decreases with the passage of time, the electric resistance value of the load 132 also decreases. To do. At this time, in one example, as shown in FIG. 11, the period T in which the sensor 112 detects the value of the electric resistance or the electric value related to the electric resistance during the monitoring of the cooling process can be achieved by the control unit 106. It may be larger than the minimum value T _min. The monitoring of the cooling process may be started after a predetermined time has elapsed from the end of the power supply, and the predetermined time may be larger than the _{minimum value T min that can be achieved by the control unit 106.} With such a configuration, the measurement timing of the value for monitoring the load cooling process becomes appropriate, so that the load cooling process can be observed with high accuracy without using a dedicated temperature sensor.

FIG. 12 conceptually shows the measurement timing of the value for monitoring the cooling process of the load according to the embodiment of the present disclosure. Curve 1202 shows the cooling curve of the load 132 when the aerosol source is sufficient. Curve 1204 shows the cooling curve of the load 132 when the aerosol source is depleted (or deficient). As shown in the figure, after measuring the value of the electrical resistance of the load 132 or the electrical value related to the electrical resistance at t = 0, a dead zone is provided for a predetermined period, and the value is measured after the dead zone ends. May be repeated. It is not necessary to measure the value during the dead zone. Alternatively, while the value is measured during the dead zone, the value measured during the dead zone may not be used to determine whether the aerosol source is depleted. The period T for measuring the value after the end of the dead zone may be larger than the _{minimum value T min that can be achieved by the control unit 106, or may be T min} . In addition, monitoring of the cooling process may be started after a predetermined time has elapsed from the end of power supply.

FIG. 13 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. The processes of steps 1302 to 1308 are the same as the processes of steps 402 to 408 of FIG.

In step 1310, the control unit 106 _{determines whether or not the time indicated by the timer exceeds a predetermined period tdead_zone} of the dead zone (that is, whether or not the dead zone has ended). If the dead zone is not finished (“N” in step 1310), the process returns before step 1308. When the dead zone ends (“Y” in step 1310), the process proceeds to step 1312. The processes of steps 1312 to 1324 are the same as the processes of steps 410 to 422 of FIG. According to the embodiment of FIGS. 12 and 13, by providing the dead zone, the measurement timing of the value for monitoring the cooling process of the load becomes appropriate, so that the load can be cooled without using a dedicated temperature sensor. The process can be observed with high accuracy.

FIG. 14 conceptually shows the measurement timing of the value for monitoring the cooling process of the load according to the embodiment of the present disclosure. Curve 1402 shows the cooling curve of the load 132 when the aerosol source is sufficient. Curve 1404 shows the cooling curve of the load 132 when the aerosol source is depleted (or deficient). As shown, the time from the first measurement of the electrical resistance value of the load 132 or the electrical value related to the electrical resistance at t = 0 to the second measurement of the value is the second time. It may be longer than the time between the time of measurement of and the time of measurement of the third time. As shown, the time between adjacent measurement time points may be set to be gradually shortened thereafter.

FIG. 15 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. The processes of steps 1502 to 1506 are the same as the processes of steps 402 to 406 of FIG.

In step 1508, the control unit 106 determines the value of the measurement cycle T shown in FIG. In one example, as shown in step 1508, the measurement cycle T may be determined as the product of a predetermined coefficient α and the resistance value of the load 132 at that time. If the load 132 is a PTC heater, the resistance value of the load 132 decreases as the temperature of the load 132 decreases. Therefore, according to the above example, T becomes shorter each time the value is measured. The above-mentioned method for calculating T is only an example. As another example, the measurement cycle T may be calculated to be inversely proportional to the elapsed time from the start of the cooling process, or may be calculated to be inversely proportional to the number of measurements already taken.

The process of step 1510 is the same as the process of step 408. The process proceeds to step 1512, and the control unit 106 determines whether or not the time has elapsed by the updated T after the update of the T in step 1508. If the time has not elapsed by T (“N” in step 1512), the process returns before step 1510. When the time has elapsed by T (“Y” in step 1512), the process proceeds to step 1514. The processes of steps 1514 to 1520 are the same as the processes of steps 410 to 416.

If it is determined that the load 132 has not reached room temperature (“N” in step 1520), the process returns to before step 1508, a new T is set, and the processes from steps 1508 to 1520 are repeated. If it is determined that the load 132 has reached room temperature (“Y” in step 1520), the process proceeds to step 1522. The processes of steps 1522 to 1526 are the same as the processes of steps 418 to 422.

According to the embodiment of FIGS. 14 and 15, the control unit 106 gradually shortens the period in which the sensor 112 detects the value of the electric resistance or the electric value related to the electric resistance during the monitoring of the cooling process. Can be configured to. The lower the temperature of the load 132 corresponding to the value detected by the sensor 112, the more the control unit 106 detects the value of the electric resistance or the electric value related to the electric resistance by the sensor 112 during the monitoring of the cooling process. May be configured to shorten. With such a feature, an appropriate measurement frequency can be set, and the influence on the cooling process of the load 132 is small.

FIG. 16 schematically shows a process of supplying power to the load and cooling the load after the power supply is stopped according to the embodiment of the present disclosure. Curve 1602 shows the cooling curve of the load 132 when the aerosol source is sufficient. Curve 1604 shows the cooling curve of the load 132 when the aerosol source is depleted (or deficient). The asterisks in FIG. 16 indicate the temperature of the load 132 corresponding to the resistance value of the load 132 before the start of aerosol generation or immediately after the start of power supply.

FIG. 17 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. In step 1702, the control unit 106 determines whether or not there has been an aerosol generation request. As an example, the control unit 106 may determine whether or not suction by the user has been started based on the output of the pressure sensor or the like. In another example, the control unit 106 may determine whether or not a button provided on the aerosol generator 100 has been pressed to supply power to the load 132.

The process proceeds to step 1704, and the control unit 106 turns on the switch Q2 before turning on the switch Q1. Then, in step 1706, the control unit 106 measures the electrical resistance value of the load 132 or the electrical value associated with the electrical resistance by the various methods already described. Here, it will be described below assuming that the electric resistance value of the load 132 is measured. The control unit 106 holds the electric resistance value measured in step 1706 as an initial value. In step 1708, the control unit 106 turns off switch Q2. The process proceeds to step 1710, and the control unit 106 turns on the switch Q1 to start supplying power to the load 132.

The processes from steps 1712 to 1724 are the same as the processes from steps 402 to 414.

The process proceeds to step 1726, and the control unit 106 _{determines whether or not the resistance value R HTR} (t) measured in step 1722 is equal to the initial value measured in step 1706. If they are not equal (“N” in step 1726), processing returns before step 1718. If they are equal (“Y” in step 1726), processing proceeds to step 1728. The process of steps 1728 to 1732 is the same as the process of steps 418 to 422.

According to the embodiments of FIGS. 16 and 17, the control unit 106 is configured to determine the occurrence of aerosol source depletion based on the cooling process until the value detected by the sensor 112 reaches a steady state. Since the cooling process is observed until the temperature of the load 132 becomes steady, the cooling process can be monitored to an appropriate end point. In one example, the control unit 106 puts the value detected by the sensor 112 into a steady state based on the comparison between the value detected by the sensor 112 before the power supply is executed and the value detected by the sensor 112 in the cooling process. It may be configured to determine if it has been reached. As a result, it is determined whether or not the steady state has been reached based on the resistance value before the aerosol is generated. Therefore, as compared with the case where the judgment is made based on the predetermined threshold value, the individual difference of the load 132 can be taken into consideration, and the accuracy of the judgment as to whether or not the steady state is reached is improved. Further, even when the temperature in the operating environment of the aerosol generator 100 is different from the general room temperature (for example, 25 ° C.), the end point of the cooling process can be appropriately observed.

In addition, instead of the above-described embodiment, in consideration of the measurement error of the sensor 112, in step 1726, the resistance value R _HTR (t) measured in step 1722 executes the initial value or power supply measured in step 1706. It may be determined whether or not the value detected by the sensor 112 is equal to the value obtained by adding a minute predetermined value Δ.

FIG. 18 conceptually shows a method of monitoring a load cooling process according to an embodiment of the present disclosure. Curve 1802 shows the cooling curve of the load 132 when the aerosol source is sufficient. Curve 1804 shows the cooling curve of the load 132 when the aerosol source is depleted (or deficient). In this example, instead of the ideal cooling time when the temperature of the load 132 drops completely to room temperature (eg 25 ° C), the temperature of the load 132 drops to a temperature higher than room temperature (eg 25 ° C + Δ). Approximate cooling time is used as the time to reach a steady state.

FIG. 19 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. The processes from steps 1902 to 1914 are the same as the processes from steps 402 to 414.

In step 1916, the control unit 106 sets the resistance value of the load 132 measured in step 1912 to the resistance value of the load 132 after the approximate cooling time has elapsed ( _RHTR ( _THTR = RT + Δ). )) To determine whether or not they match. The latter resistance value may be stored in the memory 114 in advance. If they do not match (“N” in step 1916), processing returns before step 1908. If they match (“Y” in step 1916), the process proceeds to step 1918. The processes of steps 1918 to 1922 are the same as the processes of steps 418 to 422.

According to the embodiments of FIGS. 18 and 19, the control unit 106 is configured to determine the occurrence of aerosol source depletion based on the cooling process until the value detected by the sensor 112 reaches a steady state. In one example, the control unit 106 constantly determines the value detected by the sensor based on the comparison between the value detected by the sensor 112 corresponding to the temperature corresponding to the temperature higher than the room temperature by a predetermined value and the value detected by the sensor 112 in the cooling process. It is configured to determine if a condition has been reached.

The value of Δ used in the embodiments of FIGS. 18 and 19 may be set to be larger than the load temperature error obtained from the value detected by the sensor 112 due to the error of the sensor 112. As an example, when the sensor 112 is a voltage sensor, the error of the resistance value that can be measured using the voltage sensor from the measurement error values known for the voltage sensor such as gain error, offset error, and hysteresis error. Can be sought. Further, the temperature error that can be estimated for the load 132 can be obtained from the error of the measurable resistance value and the error of the temperature-resistance characteristic known for the load 132. In this case, Δ may be set to be larger than the estimated temperature error. As a result, the individual difference of the load 132 can be taken into consideration as compared with the case where the judgment is made based on a predetermined threshold value such as 25 ° C. corresponding to room temperature, and the accuracy of the judgment as to whether or not the steady state is reached can be improved. improves.

FIG. 20 conceptually shows a method of monitoring a load cooling process according to an embodiment of the present disclosure. The curve 2002 is a cooling curve of the load 132. R _HTR (t _n-6 ), R _HTR (t _n-5 ), ..., R _HTR (t _n ) are at the time points of _{t n-6} , t _n-5 , ..., T _{n, respectively.} Represents the resistance value of the load 132 measured in. Instead of the resistance value, the electrical value related to the resistance of the load 132 may be used. The time derivative, deviation and variance of these values measured for the load 132 can be calculated using, for example, the mathematical formula shown in FIG. In this example, even if the estimated temperature of the load 132 has not yet reached room temperature + Δ, the resistance value or resistance value of the load 132 is determined based on whether the time derivative, deviation, or variance satisfies the predetermined conditions. It is determined whether the associated electrical value has reached a steady state.

FIG. 21 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. The processes from steps 2102 to 2116 are the same as the processes from steps 1902 to 1916 in FIG.

If it is determined in step 2116 that the load 132 has not reached a predetermined steady state (“N” in step 2116), the process proceeds to step 2118. In step 2118, the control unit 106 determines whether the absolute value of the time derivative of the resistance value (or electrical value associated with the resistance value) of the load 132 is smaller than a predetermined threshold value. If the absolute value is greater than or equal to the threshold (“N” in step 2118), processing returns before step 2108. If the absolute value is less than the threshold (“Y” in step 2118), the process proceeds to step 2120. The condition in step 2118 may further include that the time derivative value is zero or less. This makes it possible to avoid erroneously determining that a steady state has been reached when the cooling curve 2002 vibrates and its slope becomes positive. The process of steps 2120 to 2124 is similar to the process of steps 1918 to 1922.

FIG. 22 is a flowchart of processing according to an embodiment of the present disclosure related to FIG. The processes from steps 2202 to 2216 are the same as the processes from steps 2102 to 2116 in FIG.

If it is determined in step 2216 that the load 132 has not reached a predetermined steady state (“N” in step 2216), the process proceeds to step 2218. In step 2218, the control unit 106 determines whether the variance of the resistance value (or electrical value associated with the resistance value) of the load 132 is less than a predetermined threshold. Deviation may be used in the determination instead of variance. If the variance is greater than or equal to the threshold (“N” in step 2218), processing returns before step 2208. If the variance is less than the threshold (“Y” in step 2218), the process proceeds to step 2220. The process of steps 2220 to 2224 is similar to the process of steps 2120 to 2124.

According to the embodiments of FIGS. 20, 21 and 22, the control unit 106 reaches a steady state of the value detected by the sensor 112 based on the time derivative, deviation or variance of the value detected by the sensor 112. It is configured to judge whether or not. Compared with the case where the value itself detected by the sensor 112 is used, the time change of the value is taken into consideration, so that it becomes easy to determine that the steady state has been reached.

As described above, according to the first embodiment of the present disclosure, the control unit 106 has a timing at which the temperature of the load 132 and the value of the electric resistance or the electric value related to the electric resistance do not deviate from each other, or The value can be detected by the sensor 112 during the monitoring of the cooling process at a frequency that does not interfere with the cooling of the load 132 during the cooling process. Therefore, the cooling process of the load can be observed with high accuracy without using a dedicated temperature sensor.

Further, according to the first embodiment of the present disclosure, the control unit 106 is in the cooling process at the start of cooling of the load 132 or immediately after the start of cooling, and before the load 132 reaches room temperature. Based on the time-series changes in the values detected by the sensor 112, it can be configured to determine the occurrence of aerosol source depletion in the reservoir 116A or the aerosol substrate 116B. In one example, the control unit 106 determines whether the value detected by the sensor 112 has reached a steady state based on the value detected by the sensor 112 or the time-series change of the value, and is detected by the sensor 112. It can be configured to determine the occurrence of depletion based on the cooling process until the value reaches steady state. Therefore, the cooling process of the load can be observed with high accuracy without using a dedicated temperature sensor.

In the above description, the first embodiment of the present disclosure has been described as a method of operating an aerosol generator and an aerosol generator. However, it will be appreciated that the present disclosure may be implemented as a program that causes the processor to perform the method when executed by the processor, or as a computer-readable storage medium containing the program.

<Second embodiment>
When the load 132 (or heater) cools, for convenience, a member that carries the aerosol source from the storage unit 116A to the load 132 by utilizing the load 132 and the capillary effect (for example, the holding unit 130; hereinafter referred to as “wick”). Assuming that heat exchange occurs only between the aerosol source held by Wick and the atmosphere, the following equation holds using Newton's law of cooling.

ここで、Ｑ_ＨＴＲは、負荷１３２の熱量である。α_ｗｉｃｋ、α_{ｌｉｑｕｉｄ}及びα_ａｉｒは、それぞれ、ウィック、ウィックが保持するエアロゾル源及び大気の熱伝達率である。Ｓ_ｗｉｃｋ、Ｓ_{ｌｉｑｕｉｄ}及びＳ_ａｉｒは、それぞれ、ウィック、ウィックが保持するエアロゾル源及び大気に対する負荷１３２の表面積である。Ｔ_ＨＴＲ、Ｔ_ｗｉｃｋ、Ｔ_{ｌｉｑｕｉｄ}及びＴ_ａｉｒは、それぞれ、負荷１３２、ウィック、ウィックが保持するエアロゾル源及び大気の温度である。

Here, Q _HTR is the amount of heat of the load 132. α- _wick , α- _liquid, and α- _air are the heat transfer coefficients of the wick, the aerosol source held by the wick, and the atmosphere, respectively. S _{wick, S liquid} and _{S air,} respectively, the surface area of the load 132 with respect to the aerosol source and the atmosphere wick, wick holds. _THTR , _Twick , _Tliquid and _Air are the temperature of the load 132, the wick, the aerosol source held by the wick and the atmosphere, respectively.

The following equation holds for the amount of heat of the load 132.

ここで、Ｃ_ＨＴＲは、負荷１３２の熱容量である。

Here, the C _HTR is the heat capacity of the load 132.

Summarizing the equations (1) and (2), the following equations hold.

For simplification, the relaxation time τ is defined by the following equations (4) to (6).

Using equations (4) to (6), equation (3) can be rewritten as follows.

For further simplification, Eq. (7) is rewritten as follows.

In rewriting the above, the mathematical formulas defined by the following equations (9) and (10) were used.

In order to solve the differential equation (8), a new variable T ₁ is introduced using the following equation (11).

The differential equation (8) is transformed into variables using the equation (11).

Assuming that the wick, the aerosol source held by the wick, and the atmosphere in the cooling process of the load 132 have a sufficiently large heat capacity with respect to the load 132, the wick, the aerosol source held by the wick, and the atmosphere in the cooling process of the load 132. Atmospheric temperature changes are negligibly small. Therefore, since the first term on the left side of the differential equation (12) can be regarded as 0, the differential equation (12) can be transformed as follows.

Solving the differential equation (13) using the separation of variables gives the following equation.

ここで、Ｃは、積分定数である。

Here, C is an integral constant.

When equation (11) is regarded as a function of time t and the value when t = 0 is obtained, the following equation can be obtained.

Here, _THTR (0) is the temperature of the load 132 when t = 0, that is, at the start of the cooling process of the load 132. If equation (15) is used as the boundary condition of equation (14), the following equation holds.

Using equations (11) and (16), equation (14) _{can be solved for THTR} (t) as follows.

The inventors of the present application have discovered that the time derivative (cooling rate) of the temperature of the load 132 can be approximated by the following equation by time-differentiating the equation (17).

As mentioned above, if the temperature change of the wick, the aerosol source held by the wick and the atmosphere during the cooling process of the load 132 is negligibly small, the time change of the temperature of the load is greatly affected by _{THTR (0).} That is, it can be seen that the higher the load temperature at the start of the cooling process, the easier it is for the load temperature to drop.

From the above considerations, the inventors of the present application have come up with the technical idea of determining whether or not the aerosol source is depleted by using the cooling rate of the load 132.

FIG. 23 is a graph schematically showing a cooling process of the load 132 after the supply to the load 132 is stopped in the aerosol generation device 100. The horizontal axis shows time and the vertical axis shows the temperature of the load. Here, it is assumed that the maximum temperature of the aerosol source reached in the normal state is 200 ° C., and an example of the temperature reached by the overheated load 132 when the aerosol source is depleted is 350 ° C.

As described above, the higher the temperature of the load 132, the greater the rate of decrease in the temperature of the load 132. Therefore, in order to detect the exhaustion of the aerosol source in the example of FIG. 23, the rate of temperature change of the load 132 is measured in a region including a temperature exceeding the maximum temperature of the aerosol source that reaches normally, such as regions 2302A and 2302B. It is desirable to do. Conversely, a region such as region 2304 that contains only temperatures below the maximum temperature of the aerosol source that normally reaches is not suitable for measuring the rate of temperature change of the load 132 to detect the exhaustion of the aerosol source. ..

FIG. 24 is a diagram showing an actual cooling rate of the load 132. FIG. 24 (a) shows the cooling rate when the aerosol source is sufficient. FIG. 24 (b) shows the cooling rate when the aerosol source is depleted (or deficient). In FIGS. 24A and 24B, the horizontal axis represents time, and the vertical axis represents the cooling rate of the load 132 observed through the electrical resistance value of the load 132. In addition, in (a) and (b) of FIG. 24, the scale of the vertical axis is the same.

After the heating of the load 132 is stopped at about 4.8 seconds, the observation of the cooling process of the load 132 is divided into regions 2402, 2404, and 2406 in chronological order. The following can be said.

In the region 2402, since the heating of the load 132 is immediately stopped, the cooling rate of the load 132 is strongly affected by the disturbance due to the surge current and the residual current described above. Therefore, when observing the cooling rate via the electrical resistance value of the load 132, it is difficult to use the cooling rate of the load 132 in the region 2402 to determine whether or not the aerosol source is depleted. It will be apparent to those skilled in the art that such concerns are unlikely to occur when observing the cooling rate of the load 132 using a dedicated temperature sensor.

In region 2404, the cooling rate when the aerosol source of (a) is sufficient and the cooling rate when the aerosol source of (b) is depleted (or insufficient) are significantly different. .. It is considered that this is because the difference in the temperature of the load described above causes a significant difference in the cooling rate. Therefore, the cooling rate of the load 132 in region 2404 is suitable for determining whether the aerosol source has been depleted.

In region 2406, the cooling rate when the aerosol source of (a) is sufficient and the cooling rate when the aerosol source of (b) is depleted (or insufficient) are almost the same. It is considered that this is because the cooling rate at the temperature below the maximum temperature of the aerosol source that reaches the normal level is observed. Therefore, the cooling rate of the load 132 in region 2406 is inappropriate for determining whether the aerosol source has been depleted.

FIG. 25 is a diagram illustrating a timing suitable for measuring the cooling rate of the load 132. As described in connection with FIG. 23, by measuring the cooling rate as soon as possible after the switch Q1 is turned off and the load 132 begins to cool, it is possible to more accurately determine whether or not the aerosol source has been depleted. Can be judged. However, if the switch Q2 is turned on immediately after the switch Q1 is turned off as shown by the reference number 2502, the value related to the temperature of the measured load 132 fluctuates greatly due to the influence of the surge current and the like. Therefore, it is difficult to accurately measure the cooling rate. On the other hand, as shown by reference number 2506, even if the switch Q2 is turned on at the timing when the temperature of the load 132 becomes equal to or lower than the boiling point of the aerosol source, the aerosol source is exhausted and the aerosol source is sufficient. Significant differences are unlikely to occur between them. From these facts, as shown by the reference number 2504, the inventors of the present application depleted the aerosol source after a predetermined time has passed since the switch Q1 was turned off (after passing the set dead zone). We have come to the view that it is desirable to measure the cooling rate at a timing when the temperature of the load 132 can belong to the temperature range that can be reached only when it occurs.

FIG. 26 is a flowchart of a process for detecting the depletion of the aerosol source according to the embodiment of the present disclosure. Here, it is assumed that the control unit 106 executes all the steps. However, it should be noted that some steps may be performed by another component of the aerosol generator 100.

The process starts in step 2602, and the control unit 106 determines whether or not the aerosol generation request has been completed. As an example, the control unit 106 may determine whether or not the suction by the user is completed based on the output of the pressure sensor or the like. In another example, the control unit 106 determines whether or not the aerosol generation request has been completed based on whether or not the button provided on the aerosol generation device 100 for supplying power to the load 132 is no longer pressed. You may. In another example, a predetermined time has elapsed since the control unit 106 detects an operation on the user interface such as pressing a button provided on the aerosol generator 100 to supply power to the load 132. Based on whether or not, it may be determined whether or not the aerosol generation request has been completed.

If the aerosol production request continues (“N” in step 2602), the process returns before step 2602. When the aerosol generation request is completed (“Y” in step 2602), the process proceeds to step 2604. In step 2604, the control unit 106 turns off the switch Q1 and stops the power supply to the load 132.

The process proceeds to step 2606, and the control unit 106 waits for a predetermined time with both the switch Q1 and the switch Q2 turned off. That is, at the start or immediately after the start of the cooling process of the load 132, a dead zone is provided in which the cooling process is not monitored or the occurrence of depletion based on the monitored cooling process is not determined. The dead zone may be provided until after the surge current has decayed and before the temperature of the load 132 falls below the boiling point of the aerosol source.

The process proceeds to step 2608, and the control unit 106 activates the timer. The control unit 106 may set the value of the timer to the initial value t = 0.

The process proceeds to step 2610, and the control unit 106 turns on the switch Q2 to make the second circuit 204 function. The process proceeds to step 2612, and the control unit 106 measures a value related to the temperature of the load 132 at time t1 by using the sensor 112 or the like. The sensor 112 may be configured to detect and output the temperature, voltage, resistance value, etc. of the load 132. Here, the electrical resistance value R _HTR (t1) of the load 132 is measured. The process proceeds to step 2614, and the control unit 106 turns off the switch Q2.

The process proceeds to step 2616, and the control unit 106 turns on the switch Q2 again to make the second circuit 204 function. The process proceeds to step 2518, and the control unit 106 measures a value related to the temperature of the load 132, for example, the electric resistance value _RHTR (t2) of the load 132 at time t2. The process proceeds to step 2620, and the control unit 106 turns off the switch Q2 again.

The process proceeds to step 2622, and the control unit 106 obtains the cooling rate of the load 132 based on the values of _{R HTR} (t1), R _{HTR (t2), t1 and t2.} Then, in step 2624, the control unit 106 compares the obtained cooling rate with a predetermined threshold. If the cooling rate is less than the threshold (“Y” in step 2624), the process proceeds to step 2626 and the control unit 106 determines that the aerosol source is depleted. On the other hand, when the cooling rate is equal to or higher than the threshold value (“N” in step 2624), the process proceeds to step 2628, and the control unit 106 determines that the aerosol source is sufficiently left.

As described above, according to the embodiment shown in FIG. 26, the control unit 106 is derived from the output value of the sensor 112 in the cooling process after the load 132 has been heated to a temperature higher than the temperature at which the aerosol source can be atomized. It is configured to determine the occurrence of aerosol source depletion in the reservoir 116A or the aerosol substrate 116B based on the cooling rate. Whether or not the aerosol source is depleted is detected based on the cooling rate, and it is possible to quickly and accurately determine whether or not the aerosol source is depleted. The switch Q2, which is turned on in step 2610 by omitting step 2614 and step 2616, may continue to be turned on until step 2620.

Further, according to the above-described embodiment, in the cooling process, the difference between the cooling rate when the aerosol source is depleted and the cooling rate when the depletion does not occur is equal to or larger than the threshold value. It is configured to determine the occurrence of depletion based on the cooling rate in a certain time zone (for example, the time zone corresponding to the region 2302A or 2302B in FIG. 23). Alternatively, the control unit 106 is depleted based on the cooling rate in the time zone in which the temperature of the load 132 belongs to the temperature range that can be reached only when the depletion occurs in the cooling process (for example, the time zone corresponding to the region 2302A). May be configured to determine the occurrence of. Whether or not the aerosol source is depleted is determined based on the cooling rate derived in the section where there is a significant difference in the cooling rate. Therefore, it is possible to determine whether or not depletion has occurred with higher accuracy.

Further, according to the above-described embodiment, the control unit 106 derives the cooling rate from the plurality of output values of the sensor 112, and among the plurality of output values of the sensor 112, at least the earliest value on the time axis is cooled. Of these, the temperature of the load 132 may be acquired in a time zone to which the temperature of the load 132 belongs to a temperature range that can be reached only when depletion occurs. Alternatively, the control unit 106 may be configured to acquire a plurality of output values of the sensor 112 in a time zone in which the temperature of the load 132 belongs to a temperature range that can be reached only when depletion occurs in the cooling process. .. According to these configurations, even the starting point of the measurement period needs to belong to a region where there is a significant difference, so that it is not necessary to strictly set the dead zone, and a high-performance microcomputer having an extremely fast control cycle can be controlled. It becomes unnecessary to use it as 106.

As already described in connection with the first embodiment of the present disclosure, the load 132 may have an electrical resistance value that changes depending on the temperature. The sensor 112 may output a value related to the electric resistance value as a value related to the temperature of the load 132. In this case, since the temperature is derived from the resistance value of the load 132, an expensive dedicated temperature sensor becomes unnecessary. Further, the control unit 106 may be configured to provide a dead zone in which the value related to the electric resistance value is not acquired by the sensor 112 or the cooling rate is not derived at the start or immediately after the start of the cooling process. Alternatively, the control unit 106 derives the cooling rate based on the output value of the sensor 112 at the start or immediately after the start of the cooling process, which is corrected so that the time-series change of the output value of the sensor 112 is smoothed. It may be configured as follows. According to this configuration, since the resistance value at the start of cooling or immediately after the start of cooling is not used, it becomes difficult to observe the fluctuation of the output value of the sensor 112, and the observation accuracy of the cooling process is improved.

In one example, the control unit 106 may be configured to control the power supply from the power supply 110 to the load 132 so that the power supplied from the power supply 110 to the load 132 is gradually reduced or gradually reduced before the cooling process. Good. As a result, the current flowing through the circuit can be reduced at the end of the aerosol generation stage. Therefore, since the period in which the output value fluctuates due to the surge current or residual current described above can be shortened, it is possible to observe a section in which a significant difference occurs depending on the cooling rate.

In one example, the dead zone described above may be provided so as to continue until at least one of the residual current and the surge current generated at the end of power supply becomes equal to or less than the threshold value. As a result, the dead zone becomes longer than the time until the surge current or residual current disappears or becomes negligibly large. Therefore, the cooling process is not observed in a state where the residual current or surge current is superimposed on the output value of the sensor, so that the observation accuracy is improved.

In one example, the dead zone may be shorter than the length at which the cooling process completes in the absence of depletion. This makes the dead zone shorter than the cooling time when there is a sufficient aerosol source. Therefore, since an excessively long dead zone is not required, it is possible to prevent the observation of the cooling process from being hindered.

In one example, at least one of the time from the end of power supply to the start of acquisition of the value related to the electric resistance value by the sensor 112 and the cycle in which the sensor 112 acquires the value related to the electric resistance value can be achieved by the control unit 106. It may be larger than the minimum value. As a result, when observing the cooling process of the load 132 via the resistance value, the observation timing or the frequency of observation is intentionally reduced. Therefore, the cooling process of the load can be observed with high accuracy without using a dedicated temperature sensor.

FIG. 27 is a flowchart of a process for detecting the depletion of the aerosol source according to the embodiment of the present disclosure. The processing of steps 2702 and 2704 is the same as the processing of steps 2602 and 2604 of FIG.

The process proceeds to step 2706, and the control unit 106 turns on the switch Q2. Switch Q2 may be turned on immediately after switch Q1 is turned off. Then, in step 2708, the control unit 106 turns off the switch Q2. The current flowing through the load 132 when the switch Q2 is on is smaller than the current flowing through the load 132 when the switch Q1 is on. Therefore, the surge current generated after the on and off of the switch Q2 in steps 2706 and 2708 is smaller than the surge current generated in the example shown by the reference number 2502 in FIG. 25. It should be noted that steps 2704 to 2708 may be performed before step 2702. As a result, the cooling process can be observed immediately after the start.

The process of steps 2710 to 2732 is the same as the process of steps 2606 to 2628.

The aerosol generator according to the second embodiment of the present disclosure may include, in one example, the circuit 200 shown in FIG. The circuit 200 is connected in series between the power supply 110 and the load 132, is connected in series between the first circuit 202 having the first switch (switch) Q1 and between the power supply 110 and the load 132, and is parallel to the first circuit 202. The second circuit 204, which has a second switch Q2 and has an electric resistance value larger than that of the first circuit 202, may be included. The control unit 106 controls the first switch Q1 and the second switch Q2, and outputs the sensor while only the second switch Q2 of the first switch Q1 and the second switch Q2 is on. It may be configured to derive the cooling rate based on the value. This configuration has a dedicated high resistance resistance value measurement circuit. Therefore, it is possible to reduce the influence on the cooling process of the load when measuring the resistance value. As described in connection with FIG. 27, the control unit 106 may be configured to turn on the second switch Q2 immediately before the cooling process. As a result, the first switch Q1 and the second switch Q2 are alternately turned on. Therefore, the surge current and the residual current at the start of the cooling process can be relaxed.

FIG. 28 schematically shows a circuit included in an aerosol generator according to an embodiment of the present disclosure. The circuit 2800 differs from the circuit 200 of FIG. 2 in that it does not include the second circuit 204. In the example of FIG. 28, the aerosol generator may include a temperature sensor 112E that detects and outputs the temperature of the load 132. In this case, for example, the control unit 106 directly measures the temperature of the load 132 at the time points t1 and t2 by the temperature sensor 112E without performing the processes of steps 2606 to 2622 in FIG. 26, and is based on the measured temperature. The cooling rate may be obtained.

In yet another example, the aerosol generator may include a circuit having a configuration similar to that of circuit 2800 shown in FIG. 28, and instead of the temperature sensor 112E, the voltage value across the load 132 as shown in FIG. The voltage sensor 112B for detecting the above may be provided. In this case, the aerosol generator does not include switch Q2. The control unit 106 may execute the same process as the process of FIG. 26. However, in this case, instead of step 2606, the control unit 106 turns off the switch Q1 and stands by for a predetermined time. The control unit 106 also turns on switch Q1 in place of steps 2610 and 2616 and turns off switch Q1 in place of steps 2614 and 2620.

In the above description, the second embodiment of the present disclosure has been described as a method of operating an aerosol generator and an aerosol generator. However, it will be appreciated that the present disclosure may be implemented as a program that causes the processor to perform the method when executed by the processor, or as a computer-readable storage medium containing the program.

<Third embodiment>
If an aerosol generation request is made when the aerosol source in the reservoir 116A or the aerosol substrate 116B is depleted, the heater (load 132) is heated while exposed to the atmosphere. Therefore, depending on the material constituting the load 132, the load 132 may undergo a chemical change and its physical properties may change. In one example, a protective film is formed on the surface of the load 132 due to a phenomenon such as oxidation, and as a result, the electric resistance value of the load 132 may change. The inventors of the present application have come up with the technical idea of detecting the occurrence of exhaustion of an aerosol source in an aerosol generator by utilizing such a phenomenon. Hereinafter, the present embodiment will be specifically described.

FIG. 29 conceptually shows a method for determining the occurrence of aerosol source depletion according to an embodiment of the present disclosure. The horizontal axis of the graph shows time, and the vertical axis shows the electrical resistance value of the load 132. The electrical resistance value of the load 132 is only an example of a value related to the physical properties of the load 132 used in the present embodiment. It will be appreciated by those skilled in the art that values related to various physical properties of the load 132 that may change due to the depletion of the aerosol source can be used in this embodiment.

_RHTR (t ₀ ) indicates the resistance value of the load 132 at room temperature (here, 25 ° C.) (or steady state) at _{time t 0} before the power supply to the load 132 is performed. _{The RHTR} (t ₀ ) can be measured by turning on the switch Q2 and operating the second circuit 204.

In this example, aerosol generation request is made at time t _1. In response to the request, the switch Q1 is turned on and the power supply to the load 132 is started. As described in connection with the first embodiment and the second embodiment, if a PTC heater is used for the load 132, the resistance value _RHTR of the load 132 increases as the temperature of the load 132 rises. Curve 2902 in FIG. 29 shows the change in resistance of the load 132 when there is a sufficient aerosol source. Curve 2904 shows the change in resistance of the load 132 when the aerosol source is depleted.

If there is a sufficient aerosol source, the resistance of the load 132 will not increase when the temperature of the load 132 reaches the maximum temperature of the aerosol source (here 200 ° C.) that normally reaches, as shown by curve 2902. .. The aerosol generation request is completed at time t _2, the the switch Q1 is turned off, the temperature of the load 132 decreases, the resistance value of the load 132 is lowered. When the temperature of the load 132 reaches room temperature (or steady state), the resistance value returns to _{the value RHTR} (t _{0) before heating of the load 132.}

When the aerosol source is depleted, as shown by curve 2904, the temperature of the load 132 exceeds the maximum temperature of the aerosol source that normally arrives and is reachable only when the aerosol source is depleted (eg,). , 350 ° C). At this time, the physical characteristics of the load 132 may change depending on the material of the load 132. For example, a protective film may be formed on the surface of the load 132. In this example, the temperature of the load 132 at time _{t 2} has reached to over 350 ° C.. When the switch Q1 is turned off, the temperature of the load 132 decreases, and the resistance value of the load 132 decreases accordingly. However, as shown in FIG. 29, even if the temperature of the load 132 returns to room temperature (or a steady state), the resistance value of the load 132 does not return to the value before heating due to the influence of the above-mentioned changes in physical properties. , Greater than that value. In this embodiment, it is based on whether or not the difference ΔR between the _{resistance value R HTR} (t ₃ ) of the load 132 at _{time t 3} and the original resistance value R _HTR (t _{0) is equal to or greater than a predetermined threshold value.} , It is determined whether the aerosol source is depleted. Here, t _3- t ₂ may be set so that the time required for the load 132 to return to room temperature (or steady state) when the aerosol source is sufficient is Δt _{cooling or more.}

FIG. 30 is a flowchart of processing according to an embodiment of the present disclosure, which is related to FIG. 29. Here, it is assumed that the control unit 106 executes all the steps. However, it should be noted that some steps may be performed by another component of the aerosol generator 100.

The process starts in step 3002, and the control unit 106 determines whether or not the connection of the heater (load) is detected. For example, when the control unit 106 detects that the cartridge 104A is connected to the main body 102, it determines that the heater connection has been detected.

If no heater connection is detected (“N” in step 3002), the process returns to step 3002. When the heater connection is detected (“Y” in step 3002), the process proceeds to step 3004. In step 3004, the control unit 106 turns on the switch Q2 to make the second circuit 204 function. The timing at which the switch Q2 is turned on can be any _{time from the time t 0} in FIG. 28 to the time t _{1 when the aerosol generation is started.} The timing for turning on the switch Q2 may be the time when it is determined in step 3010, which will be described later, that there is an aerosol generation request.

The process proceeds to step 3006, and the control unit 106 measures a value related to the physical properties of the load 132. For example, the control unit 106 may measure the voltage applied to both ends of the load 132 using a voltage sensor, and measure the electric resistance value of the load 132 based on the voltage. In the example of FIG. 30, the resistance value R _HTR (t ₀ ) of the load 132 will be measured in this way. The process proceeds to step 3008, and the control unit 106 turns off the switch Q2.

The process proceeds to step 3010, and the control unit 106 determines whether or not there is an aerosol generation request. As an example, the control unit 106 may determine whether or not suction by the user has been started based on the output of the pressure sensor or the like. In another example, the control unit 106 may determine whether or not a button provided on the aerosol generator 100 has been pressed to supply power to the load 132. If there is no aerosol production request (“N” in step 3010), the process returns before step 3010. If there is an aerosol production request (“Y” in step 3010), the process proceeds to step 3012. In step 3012, the control unit 106 turns on the switch Q1 to start supplying power to the load 132.

The processes from steps 3014 to 3020 are the same as the processes from steps 402 to 408 in FIG.

The process proceeds to step 3022, and the control unit 106 determines whether or not _{the value t of the timer is equal to or greater than the Δt cooling shown in FIG.} If the condition is not met (“N” in step 3022), the process returns before step 3020. If the condition is met (“Y” in step 3022), the process proceeds to step 3024.

In step 3024, the control unit 106 turns on the switch Q2 to make the second circuit 204 function. Then, in step 3026, the control unit 106 _{measures the resistance value R HTR} (t ₃ ) of the load 132 (see FIG. 29). Then, in step 3028, the control unit 106 turns off the switch Q2.

The process proceeds to step 3030, and the control unit 106 determines whether or not the difference between the _RHTR (t ₃ ) and the _RHTR (t _{0) is equal to or greater than a predetermined threshold value.} When the difference is equal to or greater than the threshold value (“Y” in step 3030), the process proceeds to step 3032, and the control unit 106 determines that the aerosol source is depleted. On the other hand, if the difference is less than the threshold (“N” in step 3030), the process proceeds to step 3034 and the control unit 106 determines that a sufficient aerosol source remains.

FIG. 31 shows Table 3100 showing the redox potentials of various metals that can be used in the production of the load 132 (heater) and the ease with which an oxide film is formed. The smaller the redox potential, the easier it is to form an oxide film, and the larger the redox potential, the less likely it is to form an oxide film. In Table 3100, Al is most likely to form an oxide film, and Au is most difficult to form an oxide film. In the present embodiment, a phenomenon in which the physical properties of the load 132 change at a temperature that can be reached only when the aerosol source is depleted is used to detect the occurrence of the aerosol source depletion. Therefore, among the metals shown in Table 3100, Al, Ti, Zr, Ta, Zn, Cr, Fe, Ni, Pb and Cu, which can form an oxide film, are suitable for producing the load 132. Therefore, the load 132 may include a metal having an oxidation-reduction potential equal to or lower than the redox potential of copper. As an example, in addition to the above metals, the load 132 may contain NiCr. In addition, the load 132 may be configured to have no passivation coating on its surface so that oxidation is not hindered. In other words, it can be said that stainless steel or the like having a passivation film formed on the surface is not suitable for manufacturing the load 132.

FIG. 32 conceptually shows a method for determining the occurrence of aerosol source depletion according to an embodiment of the present disclosure. The R _HTR (t ₁ ) is the load 132 at room temperature (here, 25 ° C.) (or steady state) at _{time t 1} when the switch Q1 is turned on and the power supply to the load 132 is started. Indicates the resistance value. Curve 3202 shows the change in resistance of the load 132 when there is a sufficient aerosol source. Curve 3204 shows the change in resistance of the load 132 when the aerosol source is depleted.

Similar to the example of FIG. 29, when the aerosol source is sufficient, the load when the temperature of the load 132 reaches the maximum temperature of the aerosol source (here, 200 ° C.) reached under normal conditions, as shown by curve 3202. The resistance value of 132 does not increase. Aerosol generation request is completed at time t _2, the the switch Q1 is turned off, the temperature of the load 132 decreases, the resistance value of the load 132 is lowered. _{The resistance value R HTR} (t ₃ ) when the temperature of the load 132 reaches room temperature (or steady state) is substantially equal to the value R _HTR (t _{1) before heating.}

Similar to the example of FIG. 29, when the aerosol source is depleted, the temperature of the load 132 exceeds the maximum temperature of the aerosol source that normally reaches, and the aerosol source is depleted, as shown by curve 3204. It rises further to a temperature that can only be reached when. At this time, the physical characteristics of the load 132 may change depending on the material of the load 132. When the switch Q1 is turned off, the temperature of the load 132 decreases, and the resistance value of the load 132 decreases accordingly. However, even if the temperature of the load 132 returns to room temperature (or steady state), the resistance value R _HTR (t ₃ ) of the load 132 is higher than the value R _HTR (t _{1) before heating due to the influence of changes in physical properties.} growing.

FIG. 33 is a flowchart of processing according to an embodiment of the present disclosure, which is related to FIG. 32. The process of steps 3302 to 3316 is the same as the process of steps 3014 to 3028 of FIG.

The process proceeds to step 3318, and the control unit 106 determines whether or not the resistance value of the load 132 when returning to the steady state is _{equal to or greater than a predetermined threshold value R thre.} The threshold value _Rthre is the sum of the steady-state resistance value when the aerosol source is sufficient and the amount of increase known in advance about the resistance value of the load 132 when the physical properties of the load 132 change due to overheating. .. In other words, the threshold value R _thre is the resistance value of the load 132 when the physical properties of the load 132 change due to overheating. The threshold value R _thre may be stored in the memory 114 in advance. In step 3318, instead of the above processing, the control unit 106 also measures the resistance value at time t ₁ in FIG. 32, the resistance value measured in the resistance value and the time t ₁ which is measured at time t ₃ and It may be determined whether or not the difference between the two is equal to or greater than a predetermined threshold value. The predetermined threshold value may be stored in the memory in advance. The processing of steps 3320 and 3322 is the same as the processing of steps 3032 and 3034.

In the embodiment of FIGS. 29 and 30, or in the embodiments of FIGS. 32 and 33, if the aerosol generation request reoccurs during cooling of the load 132 before the temperature of the load 132 drops to room temperature or steady state, the load The temperature and resistance of 132 rise again. In this case, it becomes difficult to accurately determine whether or not the aerosol source is depleted by the process of FIG. 30 or FIG. 33. As a solution to this problem, the control unit 106 may prohibit atomization of the aerosol source by the load 132 until the resistance value of the load 132 returns to the steady state. As an example, the control unit 106 _{may or may not meet} the aerosol generation request during the Δt cooling shown in FIGS. 29 and 32.

FIG. 34 conceptually shows a method for determining the occurrence of aerosol source depletion according to an embodiment of the present disclosure. Unlike the case of FIG. 32, in this example, also to measure the resistance value of the load 132 at a time prior to time t ₄ to time t _3, it is determined whether the aerosol source is depleted. Time t _4, when the aerosol source is depleted, after the load 132 to over temperature capable of atomizing the aerosol source is heated, before the time when the temperature of the load 132 decreases until a steady state At the time.

FIG. 35 is a flowchart of processing according to an embodiment of the present disclosure, which is related to FIG. 32. The process of steps 3502 to 3508 is the same as the process of steps 3302 to 3308 of FIG.

The process proceeds to step 3510, and the control unit 106 determines whether or not the value t of the timer exceeds the alternative cooling time shown in FIG. 34. If the condition is not met (“N” in step 3510), processing returns to step 3508. If the condition is met (“Y” in step 3510), the process proceeds to step 3512. The processing of steps 3512 to 3516 is the same as the processing of steps 3312 to 3316 in FIG.

The process proceeds to step 3518, and the control unit 106 _{determines whether or not the resistance value R HTR} (t ₄ ) of the load 132 measured in step 3514 is equal to or greater than a predetermined value. The predetermined value may be, for example, _R'HTR (t ₃ ) + ( _R'HTR (t ₃ ) -R _HTR (t ₁ ))-Δ (see FIG. 34). This takes into consideration the point that the resolution of the resistance value of the load 132 by the sensor 112 _{must be smaller than R'HTR} (t ₃ ) _-RHTR (t ₁ ) and Δ as a correction term. That is, the resistance value of the load 132 before reaching the steady state and the value obtained by adding the default value to the resistance value of the load 132 in the steady state when depletion occurs are compared. The latter value may be stored in the memory 114 in advance. Alternatively, the value obtained by subtracting the default value from the resistance value of the load 132 before reaching the steady state may be compared with the resistance value of the load 132 in the steady state when depletion occurs.

If the condition is met (“Y” in step 3518), the process proceeds to step 3520 and the control unit 106 determines that the aerosol source is depleted. If the condition is not met (“N” in step 3518), the process proceeds to step 3522 and the control unit 106 determines that a sufficient aerosol source remains.

As described above, the aerosol generator according to the third embodiment of the present disclosure changes its physical properties when heated at a temperature that can be reached only when the aerosol source in the reservoir 116A or the aerosol base material 116B is depleted. The load 132 is provided. A value related to the physical properties of the load 132 is output by the sensor 112. The control unit 106 may be configured to determine the occurrence of depletion based on the output value of the sensor 112 after the load 132 has risen to a temperature above which the aerosol source can be atomized. As a result, the depletion of the aerosol source is detected based on the change in the physical properties of the load 132 due to the depletion of the aerosol source. Therefore, the occurrence of aerosol source depletion can be detected with high accuracy.

Further, as described above, the control unit 106 determines the occurrence of depletion based on the output value of the sensor 112 in the steady state after the load 132 has risen to a temperature higher than the temperature at which the aerosol source can be atomized. It may be configured. As a result, the exhaustion of the aerosol source is detected based on the physical properties of the load 132 in the steady state. Therefore, the possibility of erroneous detection is reduced.

Further, as described above, the control unit 106 determines the occurrence of depletion based on the amount of change in the output value of the sensor 112 before and after raising the temperature of the load 132 to a temperature higher than the temperature at which the aerosol source can be atomized. It may be configured. As a result, the exhaustion of the aerosol source is detected based on the amount of change in the physical properties of the load 132 before and after the power supply to the load 132. Therefore, it is less likely to be affected by the individual difference in load as compared with the case where the physical properties after the end of power supply are compared with the threshold value.

Further, as described above, the control unit 106 determines the occurrence of depletion based on the difference in the output value of the sensor 112 in the steady state before and after raising the temperature of the load 132 to a temperature higher than the temperature at which the aerosol source can be atomized. It may be configured to do so. As a result, depletion of the aerosol source is detected based on the amount of change in physical properties in the steady state before and after power supply. Therefore, as compared with the case where the physical properties after power supply are compared with the threshold value, it is less likely to be affected by the individual difference of the load 132.

Further, as described above, the control unit 106 raises the temperature of the load 132 to a temperature equal to or higher than the temperature at which the aerosol source can be atomized, and then causes the aerosol source by the load 132 until the output value of the sensor 112 reaches a steady state. It may be configured to prohibit atomization. This defines the interval to the steady state. Therefore, the frequency of determining the exhaustion of the aerosol source can be increased.

Further, as described above, the control unit 106 depletes the output value of the sensor 112 before reaching a steady state in the cooling process after the load 132 has risen to a temperature higher than the temperature at which the aerosol source can be atomized. The occurrence of depletion may be determined based on a comparison with a value obtained by adding a default value to a value related to the physical properties of the load 132 in the steady state when the occurrence of Alternatively, the control unit 106 sets a value obtained by subtracting a default value from the output value of the sensor 112 before reaching a steady state in the cooling process after the load 132 has been heated to a temperature higher than the temperature at which the aerosol source can be atomized. , The occurrence of depletion may be determined based on the comparison with the value related to the physical properties of the load 132 in the steady state when the depletion occurs. As a result, the physical characteristics of the load 132 are measured before the steady state is reached. Therefore, it is possible to identify the occurrence of aerosol source depletion earlier.

Further, as described above, the sensor may output a value related to the electric resistance value of the load 132 as a value related to the physical properties of the load 132. As a result, the temperature is derived from the resistance value of the load. Therefore, an expensive dedicated temperature sensor becomes unnecessary.

Further, as described above, the control unit 106 determines the output value of the sensor 112 after the load 132 has been heated to a temperature higher than the temperature at which the aerosol source can be atomized, and a protective film (for example, oxidation) on the surface of the load 132. It may be configured to determine the occurrence of depletion based on a comparison with a value related to the resistance value of the load 132 when the film) is formed. Further, as described above, the control unit 106 changes the output value of the sensor 112 before and after raising the temperature of the load 132 to a temperature higher than the temperature at which the aerosol source can be atomized, and the protective film on the surface of the load 132. It may be configured to determine the occurrence of depletion based on a comparison with the amount of change in the value related to the resistance value of the load 132 due to formation. In these cases, the value corresponding to the protective film portion is the threshold value. The threshold value may be stored in the memory 114 in advance. Therefore, the change in resistance value due to the formation of the protective film, that is, the occurrence of exhaustion of the aerosol source can be appropriately detected.

The aerosol generator according to the third embodiment of the present disclosure may include, in one example, the circuit 200 shown in FIG. The circuit 200 is connected in series between the power supply 110 and the load 132, is connected in series between the first circuit 202 having the first switch (switch) Q1 and between the power supply 110 and the load 132, and is parallel to the first circuit 202. The second circuit 204, which has a second switch Q2 and has an electric resistance value larger than that of the first circuit 202, may be included. The control unit 106 controls the first switch Q1 and the second switch Q2, and outputs the sensor while only the second switch Q2 of the first switch Q1 and the second switch Q2 is on. It may be configured to determine the occurrence of depletion based on the value. This configuration has a dedicated high resistance resistance value measurement circuit. Therefore, it is possible to reduce the influence on the cooling process of the load when measuring the resistance value.

In the above description, the third embodiment of the present disclosure has been described as a method of operating an aerosol generator and an aerosol generator. However, it will be appreciated that the present disclosure may be implemented as a program that causes the processor to perform the method when executed by the processor, or as a computer-readable storage medium containing the program.

Although the embodiments of the present disclosure have been described above, it should be understood that these are merely examples and do not limit the scope of the present disclosure. It should be understood that modifications, additions, improvements, etc. of embodiments can be made as appropriate without departing from the gist and scope of the present disclosure. The scope of the present disclosure should not be limited by any of the embodiments described above, but should be defined only by the claims and their equivalents.

100A, 100B ... Aerosol generator, 102 ... Main body, 104A ... Cartridge, 104B ... Aerosol generating article, 106 ... Control unit, 108 ... Notification unit, 110 ... Power supply, 112 ... Sensor, 114 ... Memory, 116A ... Storage unit, 116B ... Aerosol base material, 118A, 118B ... Atomized part, 120 ... Air intake flow path, 121 ... Aerosol flow path, 122 ... Mouthpiece part, 130 ... Holding part, 132 ... Load, 134 ... Circuit, 200 ... Circuit, 202 ... 1st circuit, 204 ... 2nd circuit, 208 ... Converter, 212 ... Shunt resistance

Claims (18)

A storage unit that stores an aerosol source or an aerosol base material that holds the aerosol source,
With a load that atomizes the aerosol source with heat generated by power supply from the power source and changes its physical properties when heated at a temperature that can be reached only when the aerosol source is depleted in the reservoir or the aerosol substrate. Therefore, the value related to the physical characteristics of the load in the steady state when the load is heated to a temperature that can be reached only when the aerosol source is depleted and then cooled is before the load is heated. The load, which is different from the value related to the physical properties of the load in the steady state of
A sensor that outputs values related to the physical characteristics of the load, and
A control unit configured to determine the occurrence of depletion based on the output value of the sensor in a steady state after the load has risen to a temperature above which the aerosol source can be atomized.
including,
Aerosol generator. The control unit is configured to determine whether or not the steady state has been reached based on a comparison between the output value of the sensor before power supply is executed and the output value of the sensor in the cooling process.
The aerosol generator according to claim 1. The control unit is configured to determine the occurrence of the depletion based on a steady value which is an output value of the sensor in a steady state after the load has risen to a temperature higher than a temperature at which the aerosol source can be atomized. Be done,
The aerosol generator according to claim 1. The control unit can acquire a request for aerosol generation, and is configured to acquire the steady-state value when the request is acquired.
The aerosol generator according to claim 3. The control unit is configured to determine the occurrence of the depletion based on the amount of change in the output value of the sensor before and after raising the load to a temperature higher than the temperature at which the aerosol source can be atomized.
The aerosol generator according to claim 1. The control unit is configured to determine the occurrence of the depletion based on the difference in the output value of the sensor in the steady state before and after raising the load to a temperature higher than the temperature at which the aerosol source can be atomized. ,
The aerosol generator according to claim 5. The control unit prohibits atomization of the aerosol source by the load until the output value of the sensor reaches a steady state after the load is raised to a temperature higher than the temperature at which the aerosol source can be atomized. Configured,
The aerosol generator according to claim 6. In the cooling process after the load has risen to a temperature equal to or higher than the temperature at which the aerosol source can be atomized, the control unit determines the output value of the sensor before reaching a steady state and when the depletion occurs. The depletion occurs based on the comparison with the value obtained by adding the default value to the value related to the physical characteristics of the load in the steady state, or the value obtained by subtracting the default value from the output value of the sensor before reaching the steady state. It is configured to determine the occurrence of the depletion based on the comparison with the value related to the physical properties of the load in the steady state.
The aerosol generator according to any one of claims 1 to 7. The electric resistance value of the load changes according to the temperature,
The sensor outputs a value related to the electric resistance value of the load as a value related to the physical characteristics of the load.
The aerosol generator according to any one of claims 1 to 8. The control unit determines the output value of the sensor after the load has risen to a temperature equal to or higher than the temperature at which the aerosol source can be atomized, and the resistance of the load when a protective film is formed on the surface of the load. The aerosol generator according to claim 9, which is configured to determine the occurrence of the depletion based on a comparison with a value associated with the value. The control unit determines the amount of change in the output value of the sensor before and after raising the temperature of the load to a temperature higher than the temperature at which the aerosol source can be atomized, and the resistance of the load due to the formation of a protective film on the surface of the load. It is configured to determine the occurrence of the depletion based on a comparison with the amount of change in the value associated with the value.
The aerosol generator according to claim 9 or 10. The load comprises a metal having a redox potential equal to or lower than the redox potential of copper.
The aerosol generator according to any one of claims 1 to 11. The load has no passivation coating,
The aerosol generator according to any one of claims 1 to 12. The load contains NiCr.
The aerosol generator according to claim 13. A first circuit connected in series between the power supply and the load and having a first switch,
A second circuit, which is connected in series between the power supply and the load, is connected in parallel with the first circuit, has a second switch, and has a larger electric resistance value than the first circuit.
Including
The control unit
Control the first switch and the second switch,
Of the first switch and the second switch, the occurrence of the depletion is determined based on the output value of the sensor while only the second switch is on.
The aerosol generator according to any one of claims 1 to 14. A method of operating an aerosol generator containing a load whose physical properties change when heated at a temperature that can be reached only when the aerosol source is depleted, and a temperature that can be reached only when the aerosol source is depleted. The value related to the physical properties of the load in the steady state when the load is cooled after the temperature rises is different from the value related to the physical properties of the load in the steady state before the load rises.
The step of detecting the value related to the physical characteristics of the load and
A step of determining the occurrence of depletion of the aerosol source based on the detected value in the steady state after the load has risen to a temperature higher than the temperature at which the aerosol source can be atomized.
Including methods. Whether or not the steady state has been reached based on a comparison between the value related to the physical characteristics of the load detected before the power supply to the load is executed and the value related to the physical characteristics of the load detected in the cooling process. Steps to determine
16. The method of claim 16. A program that, when executed by a processor, causes the processor to perform the method of claim 16 or 17.

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