CN212364865U - Temperature control circuit and aerosol generating device - Google Patents
Temperature control circuit and aerosol generating device Download PDFInfo
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- CN212364865U CN212364865U CN202021873992.6U CN202021873992U CN212364865U CN 212364865 U CN212364865 U CN 212364865U CN 202021873992 U CN202021873992 U CN 202021873992U CN 212364865 U CN212364865 U CN 212364865U
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Abstract
本申请提供一种温度控制电路和气溶胶生成装置。温度控制电路中，第一模拟电压信号采样电路用于采样电阻两端电压，第二模拟电压信号采样电路用于采样加热元件两端电压，其中，当加热元件的电阻值为预期电阻值时，第一模拟电压信号采样电路与第二模拟电压信号采样电路输出的电压值相等；模拟比较器用于比较第一模拟电压信号采样电路和第二模拟电压信号采样电路的输出，并将比较结果输出至模拟功率控制电路；模拟功率控制电路用于根据比较结果控制加热元件的加热功率，以使第一模拟电压信号采样电路与第二模拟电压信号采样电路输出的电压值趋于相等。采用该温度控制电路可实现加热元件温度的自动动态调节，且成本较低。
The present application provides a temperature control circuit and an aerosol generating device. In the temperature control circuit, the first analog voltage signal sampling circuit is used for sampling the voltage across the resistor, and the second analog voltage signal sampling circuit is used for sampling the voltage across the heating element, wherein, when the resistance value of the heating element is the expected resistance value, The voltage values output by the first analog voltage signal sampling circuit and the second analog voltage signal sampling circuit are equal; the analog comparator is used to compare the outputs of the first analog voltage signal sampling circuit and the second analog voltage signal sampling circuit, and output the comparison result to An analog power control circuit; the analog power control circuit is used to control the heating power of the heating element according to the comparison result, so that the voltage values output by the first analog voltage signal sampling circuit and the second analog voltage signal sampling circuit tend to be equal. The temperature control circuit can realize automatic and dynamic adjustment of the temperature of the heating element, and the cost is low.
Description
Technical Field
The application belongs to the technical field of low-temperature smoking set, and particularly relates to a temperature control circuit and an aerosol generation device.
Background
Low temperature smoking articles typically employ an electrical resistance type heating element to heat a smoking material to produce an aerosol. It is often desirable to have relatively precise control over the actual temperature of the heating element. In the prior art, a sampling resistor is connected in series with a heating element, an analog-to-digital conversion circuit built in a microcontroller is used for measuring voltage at two ends of the sampling resistor and voltage at two ends of the heating element, then a current value flowing through the heating element is judged according to the voltage at two ends of the sampling resistor (the resistance value of the sampling resistor is relatively stable), the resistance value of the heating element is calculated according to the current value and the voltage value of the heating element, the current temperature of the heating element is judged according to the corresponding relationship between the prestored resistance value of the heating element and the temperature of the heating element, and then the heating power of the heating element is adjusted according. On one hand, the cost of the microcontroller is high, and on the other hand, engineering personnel are needed to design the algorithm, so that the labor cost is high. How to control the temperature of the heating element under the premise of reducing the cost becomes a technical problem to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The application aims to overcome the defects in the prior art and provides a temperature control circuit and an aerosol generation device.
In order to solve the technical problem, the following technical scheme is adopted in the application: a temperature control circuit for controlling the temperature of a heating element, the heating element being connected in series with a sampling resistor, the temperature control circuit comprising: the device comprises a first analog voltage signal sampling circuit, a second analog voltage signal sampling circuit, an analog comparator and an analog power control circuit;
the first analog voltage signal sampling circuit is used for sampling the voltage at two ends of the sampling resistor, the second analog voltage signal sampling circuit is used for sampling the voltage at two ends of the heating element, and when the resistance value of the heating element is an expected resistance value, the voltage values output by the first analog voltage signal sampling circuit and the second analog voltage signal sampling circuit are equal;
the analog comparator is used for comparing the outputs of the first analog voltage signal sampling circuit and the second analog voltage signal sampling circuit and outputting a comparison result to the analog power control circuit;
the analog power control circuit is used for controlling the heating power of the heating element according to the comparison result so as to enable the voltage values output by the first analog voltage signal sampling circuit and the second analog voltage signal sampling circuit to tend to be equal.
Optionally, the first analog voltage signal sampling circuit includes: the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and a first operational amplifier; the first end of the first resistor is connected with the first end of the sampling resistor, and the second end of the first resistor is connected with the non-inverting input end of the first operational amplifier; the first end of the second resistor is connected with the non-inverting input end of the first operational amplifier, and the second end of the second resistor is grounded; the first end of the third resistor is connected with the second end of the sampling resistor, and the second end of the third resistor is connected with the inverting input end of the first operational amplifier; a first end of the fourth resistor is connected with an inverting input end of the first operational amplifier, and a second end of the fourth resistor is connected with an output end of the first operational amplifier; and the output end of the first operational amplifier is used as the output end of the first analog voltage signal sampling circuit.
Optionally, a first end of the heating element is grounded, and a second end of the heating element is connected with the sampling resistor; the second analog voltage signal sampling circuit includes: the second operational amplifier, the fifth resistor and the sixth resistor; the second end of the heating element is also connected with the non-inverting input end of the second operational amplifier; a first end of the fifth resistor is connected with an inverting input end of the second operational amplifier, and a second end of the fifth resistor is connected with an output end of the second operational amplifier; a first end of the sixth resistor is grounded, and a second end of the sixth resistor is connected with the output end of the second operational amplifier; and the output end of the second operational amplifier is used as the output end of the second analog voltage signal sampling circuit.
Optionally, a first end of the heating element is grounded, and a second end of the heating element is connected with the sampling resistor; the second analog voltage signal sampling circuit includes: a seventh resistor and an eighth resistor; the seventh resistor is connected with the second end of the heating element, and the second end of the seventh resistor is connected with the first end of the eighth resistor; and the second end of the eighth resistor is grounded, and the first end of the eighth resistor is used as the output end of the second analog voltage signal sampling circuit.
Optionally, the resistance value of the heating element increases as its temperature increases; when the comparison result is that the output voltage of the first analog voltage signal sampling circuit is higher than the output voltage of the second analog voltage signal sampling circuit, the analog power control circuit controls to increase the heating power of the heating element; and when the comparison result shows that the output voltage of the first analog voltage signal sampling circuit is lower than the output voltage of the second analog voltage signal sampling circuit, the analog power control circuit controls to reduce the heating power of the heating element.
Optionally, the output end of the first analog sampling circuit is connected to the inverting input end of the analog comparator; the analog power control circuit includes: the third operational amplifier, the first capacitor, the ninth resistor, the tenth resistor, the eleventh resistor, the twelfth resistor, the thirteenth resistor, the fourteenth resistor and the first PMOS tube; a first end of the ninth resistor is connected with the output end of the analog comparator, and a second end of the ninth resistor is connected with the non-inverting input end of the third operational amplifier; a first end of the tenth resistor is connected with a first power supply end, and a second end of the tenth resistor is connected with a non-inverting input end of the third operational amplifier; a first end of the eleventh resistor is grounded, and a second end of the eleventh resistor is connected with a non-inverting input end of the third operational amplifier; a first end of the twelfth resistor is connected with a non-inverting input end of the third operational amplifier, and a second end of the twelfth resistor is connected with an output end of the third operational amplifier; a first end of the thirteenth resistor is connected with a first end of the first capacitor, and a second end of the thirteenth resistor is connected with an output end of the third operational amplifier; the first end of the first capacitor is connected with the inverting input end of the third operational amplifier, and the second end of the first capacitor is grounded; a first end of the fourteenth resistor is connected with a second power supply end, and a second end of the fourteenth resistor is connected with a control electrode of the first PMOS tube; the control electrode of the first PMOS transistor is further connected to the output end of the third operational amplifier, the first electrode of the first PMOS transistor is connected to the first end of the fourteenth resistor, and the second electrode of the first PMOS transistor serves as the output end of the analog power control circuit and provides a driving current for the heating element.
Optionally, the resistance value of the heating element decreases as its temperature increases; when the comparison result is that the output voltage of the first analog voltage signal sampling circuit is higher than the output voltage of the second analog voltage signal sampling circuit, the analog power control circuit controls to reduce the heating power of the heating element; and when the comparison result shows that the output voltage of the first analog voltage signal sampling circuit is lower than the output voltage of the second analog voltage signal sampling circuit, the analog power control circuit controls to increase the heating power of the heating element.
Optionally, the output end of the first analog sampling circuit is connected to the non-inverting input end of the analog comparator; the analog power control circuit includes: the third operational amplifier, the first capacitor, the ninth resistor, the tenth resistor, the eleventh resistor, the twelfth resistor, the thirteenth resistor, the fourteenth resistor and the first PMOS tube; a first end of the ninth resistor is connected with the output end of the analog comparator, and a second end of the ninth resistor is connected with the non-inverting input end of the third operational amplifier; a first end of the tenth resistor is connected with a first power supply end, and a second end of the tenth resistor is connected with a non-inverting input end of the third operational amplifier; a first end of the eleventh resistor is grounded, and a second end of the eleventh resistor is connected with a non-inverting input end of the third operational amplifier; a first end of the twelfth resistor is connected with a non-inverting input end of the third operational amplifier, and a second end of the twelfth resistor is connected with an output end of the third operational amplifier; a first end of the thirteenth resistor is connected with a first end of the first capacitor, and a second end of the thirteenth resistor is connected with an output end of the third operational amplifier; the first end of the first capacitor is connected with the inverting input end of the third operational amplifier, and the second end of the first capacitor is grounded; a first end of the fourteenth resistor is connected with a second power supply end, and a second end of the fourteenth resistor is connected with a control electrode of the first PMOS tube; the control electrode of the first PMOS transistor is further connected to the output end of the third operational amplifier, the first electrode of the first PMOS transistor is connected to the first end of the fourteenth resistor, and the second electrode of the first PMOS transistor serves as the output end of the analog power control circuit and provides a driving current for the heating element.
In order to solve the technical problem, the following technical scheme is adopted in the application: an aerosol-generating device comprising: the heating device comprises a heating element and a sampling resistor connected with the heating element in series, and the heating device also comprises the temperature control circuit.
Optionally, the heating element is a resistive heating element or an infrared heating element.
Compared with the prior art, the beneficial effect of this application is: the dynamic automatic adjustment of the temperature of the heating element can be realized by only building a simple analog circuit without adopting an expensive microcontroller or editing an algorithm by engineering personnel, so that the temperature of the heating element is stabilized near the expected temperature.
Drawings
Fig. 1 is a block diagram of a temperature control circuit according to an embodiment of the present application.
Fig. 2 is an example of a first analog voltage signal sampling circuit in the temperature control circuit shown in fig. 1.
Fig. 3 is an example of a second analog voltage signal sampling circuit in the temperature control circuit shown in fig. 1.
Fig. 4 is another example of a second analog voltage signal sampling circuit in the temperature control circuit shown in fig. 1.
Fig. 5 is an example of an analog power control circuit in the temperature control circuit shown in fig. 1.
Fig. 6 shows the circuit of fig. 5 connected to an analog comparator in the case where the resistance of the heating element increases with increasing temperature.
Fig. 7 shows the circuit of fig. 5 connected to an analog comparator in the case where the resistance of the heating element decreases as its temperature increases.
Wherein, 1, heating element; 2. sampling a resistor; 3. a first analog voltage signal sampling circuit; 4. a second analog voltage signal sampling circuit; 5. an analog comparator; 6. an analog power control circuit; 7. a power supply module; u1, a first output end; u2, a second output end; u3, a third output end; a1, a first operational amplifier; a2, a second operational amplifier; a3, a third operational amplifier; r11, a first resistor; r12, a second resistor; r13, third resistor; r14, fourth resistor; r21, fifth resistor; r22, sixth resistor; r23, seventh resistor; r24, eighth resistor; r41, ninth resistor; r42, tenth resistor; r43, eleventh resistor; r44, twelfth resistor; r45, thirteenth resistor; r46, fourteenth resistance; q1, a first PMOS tube; c1, a first capacitance; VCC1, a first power supply terminal; VCC2, second power supply terminal.
Detailed Description
In this application, it is to be understood that terms such as "including" or "having" are intended to indicate the presence of the disclosed features, numbers, steps, acts, components, parts, or combinations thereof, and are not intended to preclude the presence or addition of one or more other features, numbers, steps, acts, components, parts, or combinations thereof.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The application is further described with reference to examples of embodiments shown in the drawings.
As shown in fig. 1, the embodiment of the present application provides a temperature control circuit for controlling the temperature of a heating element 1, the heating element 1 is connected in series with a sampling resistor 2, and the temperature control circuit includes: the device comprises a first analog voltage signal sampling circuit 3, a second analog voltage signal sampling circuit 4, an analog comparator 5 and an analog power control circuit 6;
the first analog voltage signal sampling circuit 3 is used for sampling the voltage at two ends of the resistor 2, the second analog voltage signal sampling circuit 4 is used for sampling the voltage at two ends of the heating element 1, wherein when the resistance value of the heating element 1 is an expected resistance value, the voltage values output by the first analog voltage signal sampling circuit 3 and the second analog voltage signal sampling circuit 4 are equal;
the analog comparator 5 is used for comparing the outputs of the first analog voltage signal sampling circuit 3 and the second analog voltage signal sampling circuit 4 and outputting the comparison result to the analog power control circuit 6;
the analog power control circuit 6 is used for controlling the heating power of the heating element 1 according to the comparison result, so that the voltage values output by the first analog voltage signal sampling circuit 3 and the second analog voltage signal sampling circuit 4 tend to be equal.
The absolute value of the temperature coefficient of resistance of the sampling resistor 2 is much smaller than the absolute value of the temperature coefficient of resistance of the heating element 1. Therefore, the resistance value of the sampling resistor 2 can be considered to be constant. The currents flowing through the sampling resistor 2 and the heating element 1 are equal, and the voltage ratio between the two directly reflects the resistance ratio of the two. As the temperature of the heating element 1 changes, the resistance value of the heating element 1 also changes, and thus the resistance ratio between the sampling resistor 2 and the heating element 1 also changes.
If the first analog voltage signal sampling circuit 3 amplifies and outputs the voltage across the sampling resistor 2 appropriately, or the second analog voltage signal sampling circuit 4 reduces and outputs the voltage across the heating element 1 appropriately, the scaling factor of amplification or reduction is designed appropriately, so that when the resistance value of the heating element 1 is the expected resistance value, the output of the first analog voltage signal sampling circuit 3 is equal to the output of the second analog voltage signal sampling circuit 4. This expected resistance is the resistance which the heating element 1 assumes when its temperature is the expected temperature.
In this way, the output of the analog comparator 5 can also reflect whether the present resistance value of the heating element 1 is higher or lower than its expected resistance value. In combination with the inherent property of whether the resistance value of the heating element 1 is a positive or negative temperature coefficient, the analog power control circuit 6 can adjust the heating power up or down accordingly. So that the temperature of the heating element 1 is always kept fluctuating around the desired temperature.
Therefore, the dynamic automatic adjustment of the temperature of the heating element 1 can be realized by only building a simple analog circuit without adopting an expensive microcontroller or editing an algorithm by engineering personnel, so that the temperature of the heating element 1 is stabilized near the expected temperature.
Alternatively, referring to fig. 1 and 2, the first analog voltage signal sampling circuit 3 includes: a first resistor R11, a second resistor R12, a third resistor R13, a fourth resistor R14 and a first operational amplifier A1; a first end of the first resistor R11 is connected with a first end of the sampling resistor 2, and a second end of the first resistor R11 is connected with a non-inverting input end of the first operational amplifier A1; a first end of the second resistor R12 is connected with the non-inverting input end of the first operational amplifier A1, and a second end of the second resistor R12 is grounded; the first end of the third resistor R13 is connected with the second end of the sampling resistor 2, and the second end of the third resistor R13 is connected with the inverting input end of the first operational amplifier A1; a first end of the fourth resistor R14 is connected to the inverting input terminal of the first operational amplifier A1, and a second end of the fourth resistor R14 is connected to the output terminal of the first operational amplifier A1; the output terminal of the first operational amplifier a1 serves as the output terminal of the first analog voltage signal sampling circuit 3.
In this way, the voltage across the sampling resistor 2 can be amplified in equal proportion. The output terminal of the first analog voltage signal sampling circuit 3 is denoted as a first output terminal U1 in the drawings.
Alternatively, referring to fig. 1 and 3, a first end of the heating element 1 is grounded, and a second end of the heating element 1 is connected with the sampling resistor 2; the second analog voltage signal sampling circuit 4 includes: a second operational amplifier a2, a fifth resistor R21, and a sixth resistor R22; the second end of the heating element 1 is also connected with the non-inverting input end of a second operational amplifier A2; a first end of the fifth resistor R21 is connected with the inverting input end of the second operational amplifier A2, and a second end of the fifth resistor R21 is connected with the output end of the second operational amplifier A2; a first end of the sixth resistor R22 is grounded, and a second end of the sixth resistor R22 is connected with the output end of the second operational amplifier A2; the output terminal of the second operational amplifier a2 serves as the output terminal of the second analog voltage signal sampling circuit 4.
In this way, the voltage across the heating element 1 can be scaled down equally. In the drawings, the output terminal of the second analog voltage signal sampling circuit 4 is denoted as a second output terminal U2.
Alternatively, referring to fig. 1 and 4, a first end of the heating element 1 is grounded, and a second end of the heating element 1 is connected with the sampling resistor 2; the second analog voltage signal sampling circuit 4 includes: a seventh resistor R23 and an eighth resistor R24; the seventh resistor R23 is connected with the second end of the heating element 1, and the second end of the seventh resistor R23 is connected with the first end of the eighth resistor R24; the second terminal of the eighth resistor R24 is grounded, and the first terminal of the eighth resistor R24 serves as the output terminal of the second analog voltage signal sampling circuit 4.
In this way, the voltage across the heating element 1 can also be scaled down. Of course, the resistance values of the seventh resistor R23 and the eighth resistor R24 should be much larger than the resistance value of the heating element 1.
In the above example, one end of the heating element 1 is grounded, but the heating element 1 may be non-grounded, and the structure of the second analog voltage signal sampling circuit 4 may refer to the structure of the first analog voltage signal sampling circuit 3.
If the resistance value of the heating element 1 increases with the temperature increase, the analog power control circuit 6 controls to increase the heating power of the heating element 1 when the comparison result is that the output voltage of the first analog voltage signal sampling circuit 3 is higher than the output voltage of the second analog voltage signal sampling circuit 4 (indicating that the temperature of the heating element 1 is lower than the expected temperature); when the comparison result shows that the output voltage of the first analog voltage signal sampling circuit 3 is lower than the output voltage of the second analog voltage signal sampling circuit 4 (indicating that the current temperature of the heating element 1 is higher than the expected temperature), the analog power control circuit 6 controls to reduce the heating power of the heating element 1.
Referring to fig. 5 and 6, the output terminal of the first analog sampling circuit is connected to the inverting input terminal of the analog comparator 5; the analog power control circuit 6 includes: a third operational amplifier A3, a first capacitor C1, a ninth resistor R41, a tenth resistor R42, an eleventh resistor R43, a twelfth resistor R44, a thirteenth resistor R45, a fourteenth resistor R46 and a first PMOS transistor Q1; a first end of the ninth resistor R41 is connected with the output end of the analog comparator 5, and a second end of the ninth resistor R41 is connected with the non-inverting input end of the third operational amplifier A3; a first end of the tenth resistor R42 is connected to the first power supply terminal VCC1, and a second end of the tenth resistor R42 is connected to the non-inverting input terminal of the third operational amplifier A3; a first end of the eleventh resistor R43 is grounded, and a second end of the eleventh resistor R43 is connected with a non-inverting input end of the third operational amplifier A3; a first end of the twelfth resistor R44 is connected to the non-inverting input terminal of the third operational amplifier A3, and a second end of the twelfth resistor R44 is connected to the output terminal of the third operational amplifier A3; a first end of the thirteenth resistor R45 is connected to the first end of the first capacitor C1, and a second end of the thirteenth resistor R45 is connected to the output end of the third operational amplifier A3; a first end of the first capacitor C1 is connected with the inverting input end of the third operational amplifier A3, and a second end of the first capacitor C1 is grounded; a first end of the fourteenth resistor R46 is connected to the second power source terminal VCC2, and a second end of the fourteenth resistor R46 is connected to the control electrode of the first PMOS transistor Q1; the control electrode of the first PMOS transistor Q1 is further connected to the output terminal of the third operational amplifier A3, the first electrode of the first PMOS transistor Q1 is connected to the first terminal of the fourteenth resistor R46, and the second electrode of the first PMOS transistor Q1 is used as the output terminal of the analog power control circuit 6 and supplies a driving current to the heating element 1 (in other words, in conjunction with fig. 1, the sampling resistor 2 and the heating element 1 are connected in series between the second electrode of the first PMOS transistor Q1 and the ground).
The output of the analog comparator 5 is denoted as third output U3 in the figures. The first power supply terminal VCC1 and the second power supply terminal VCC2 are both power supply terminals provided by the power supply module 7. In contrast, the voltage stability requirement of the first power terminal VCC1 is higher, and the voltage may be provided by a battery voltage stabilized circuit. The voltage of the second power supply terminal VCC2 may be supplied directly from the battery.
The output of the analog comparator 5 has only two cases, i.e., a high level (indicating that the voltage at its non-inverting input terminal is higher than the voltage at its inverting input terminal) or a low level (indicating that the voltage at its non-inverting input terminal is lower than the voltage at its inverting input terminal).
The output of the analog power control circuit 6 shown in fig. 5 is a square wave whose duty cycle is determined by the output of the analog comparator 5. If the analog comparator 5 outputs a low level (indicating that the voltage at the first output terminal U1 is higher than the voltage at the second output terminal U2, and the resistance value of the heating element 1 is lower, i.e., the temperature is lower), the duty ratio of the output voltage of the analog power control circuit 6 is large, and accordingly, the heating power of the heating element 1 is also large; if the analog comparator 5 outputs a high level (indicating that the voltage at the first output terminal U1 is lower than the voltage at the second output terminal U2, at which the resistance value of the heating element 1 is higher, that is, the temperature is higher), the duty ratio of the output voltage of the analog power control circuit 6 is small, and accordingly, the heating power of the heating element 1 is small.
If the resistance value of the heating element 1 decreases with the temperature increase, the analog power control circuit 6 controls to decrease the heating power of the heating element 1 when the comparison result is that the output voltage of the first analog voltage signal sampling circuit 3 is higher than the output voltage of the second analog voltage signal sampling circuit 4; when the comparison result shows that the output voltage of the first analog voltage signal sampling circuit 3 is lower than the output voltage of the second analog voltage signal sampling circuit 4, the analog power control circuit 6 controls to increase the heating power of the heating element 1.
Referring to fig. 5 and 7, the output terminal of the first analog sampling circuit is connected to the non-inverting input terminal of the analog comparator 5; the analog power control circuit 6 includes: a third operational amplifier A3, a first capacitor C1, a ninth resistor R41, a tenth resistor R42, an eleventh resistor R43, a twelfth resistor R44, a thirteenth resistor R45, a fourteenth resistor R46 and a first PMOS transistor Q1; a first end of the ninth resistor R41 is connected with the output end of the analog comparator 5, and a second end of the ninth resistor R41 is connected with the non-inverting input end of the third operational amplifier A3; a first end of the tenth resistor R42 is connected to the first power supply terminal VCC1, and a second end of the tenth resistor R42 is connected to the non-inverting input terminal of the third operational amplifier A3; a first end of the eleventh resistor R43 is grounded, and a second end of the eleventh resistor R43 is connected with a non-inverting input end of the third operational amplifier A3; a first end of the twelfth resistor R44 is connected to the non-inverting input terminal of the third operational amplifier A3, and a second end of the twelfth resistor R44 is connected to the output terminal of the third operational amplifier A3; a first end of the thirteenth resistor R45 is connected to the first end of the first capacitor C1, and a second end of the thirteenth resistor R45 is connected to the output end of the third operational amplifier A3; a first end of the first capacitor C1 is connected with the inverting input end of the third operational amplifier A3, and a second end of the first capacitor C1 is grounded; a first end of the fourteenth resistor R46 is connected to the second power source terminal VCC2, and a second end of the fourteenth resistor R46 is connected to the control electrode of the first PMOS transistor Q1; the control electrode of the first PMOS transistor Q1 is further connected to the output terminal of the third operational amplifier A3, the first electrode of the first PMOS transistor Q1 is connected to the first terminal of the fourteenth resistor R46, and the second electrode of the first PMOS transistor Q1 is used as the output terminal of the analog power control circuit 6 and supplies a driving current to the heating element 1.
The output of the analog power control circuit 6 shown in fig. 5 is a square wave whose duty cycle is determined by the output of the analog comparator 5. If the analog comparator 5 outputs a low level (indicating that the voltage at the first output terminal U1 is lower than the voltage at the second output terminal U2, i.e. the resistance value of the heating element 1 is relatively large, i.e. the temperature of the heating element 1 is relatively low), the duty cycle of the output voltage of the analog power control circuit 6 is large, and accordingly the heating power of the heating element 1 is also large; if the analog comparator 5 outputs a high level (indicating that the voltage at the first output terminal U1 is higher than the voltage at the second output terminal U2, i.e. the resistance value of the heating element 1 is relatively low and the temperature of the heating element 1 is relatively high), the duty cycle of the output voltage of the analog power control circuit 6 is small and, correspondingly, the heating power of the heating element 1 is small. This enables an automatic dynamic adjustment of the temperature of the heating element 1.
With reference to fig. 1-7, embodiments of the present application further provide an aerosol-generating device comprising: the heating device comprises a heating element 1 and a sampling resistor 2 connected with the heating element 1 in series, and the heating non-combustion device further comprises the temperature control circuit.
Optionally, the heating element 1 is a resistive heating element or an infrared heating element. In contrast, the resistance values of the resistance heating element and the infrared heating element change more regularly and obviously with the temperature, and the resistance value control circuit is more suitable for the temperature control circuit.
The embodiments in the present application are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The protective scope of the present application is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present application by those skilled in the art without departing from the scope and spirit of the present application. It is intended that the present application also include such modifications and variations as come within the scope of the appended claims and their equivalents.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021873992.6U CN212364865U (en) | 2020-09-01 | 2020-09-01 | Temperature control circuit and aerosol generating device |
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| CN202021873992.6U CN212364865U (en) | 2020-09-01 | 2020-09-01 | Temperature control circuit and aerosol generating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379706A (en) * | 2020-09-01 | 2021-02-19 | 湖北中烟工业有限责任公司 | Temperature control circuit and aerosol generation device |
| CN119029804A (en) * | 2024-08-21 | 2024-11-26 | 昆山迈致治具科技有限公司 | A temperature acquisition control protection circuit |
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2020
- 2020-09-01 CN CN202021873992.6U patent/CN212364865U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379706A (en) * | 2020-09-01 | 2021-02-19 | 湖北中烟工业有限责任公司 | Temperature control circuit and aerosol generation device |
| CN112379706B (en) * | 2020-09-01 | 2024-11-01 | 湖北中烟工业有限责任公司 | Temperature control circuit and aerosol generating device |
| CN119029804A (en) * | 2024-08-21 | 2024-11-26 | 昆山迈致治具科技有限公司 | A temperature acquisition control protection circuit |
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