JP2019163920A - Air conditioner and air conditioning control method - Google Patents

Abstract

To provide an air conditioner capable of achieving optimum temperature and optimum humidity in a higher temperature setting in which a cooling operation is difficult to work.SOLUTION: An air conditioner includes: an absolute humidity setting value calculation unit 204 for acquiring first absolute humidity indicating target absolute humidity determined by preset first temperature and first relative humidity; a dew point temperature calculation unit 209 for acquiring dew point temperature determined by the first temperature and the first relative humidity; an absolute humidity calculation unit 207 for acquiring second absolute humidity indicating indoor absolute humidity determined by second temperature indicating indoor temperature and second relative humidity indicating indoor relative humidity; a heat exchanger temperature comparison/determination unit 217 for controlling a dehumidification operation to stop air blowing of an indoor unit fan 224, close a blowout port 225, and cool an indoor heat exchanger 220 at the dew point temperature when the second absolute humidity exceeds the first absolute humidity; and an indoor unit fan/blowout port control unit 223.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to an air conditioner and an air conditioning control method. For example, in summer night air conditioning control, air having a desired absolute humidity is maintained during sleep in a bedroom even at a high cooling temperature setting. The present invention relates to a harmony device and an air conditioning control method.

  To improve the quality of sleep, which is said to occupy one third of life, an air conditioner (air conditioner) for making the temperature environment during sleep more suitable for sleep. Various control methods have been developed. Moreover, since the metabolic rate during sleep of the human body is lower than when waking up, comfortable sleep cannot be obtained by performing normal air conditioning control. For this reason, conventionally, as a cooling operation mode suitable for sleeping, a sleep mode called by a name such as “sleep mode” is considered, and a cooling operation based on this sleep mode is performed.

  For example, Patent Literature 1 discloses the following air conditioner. That is, the air conditioner performs a cooling operation based on the sleep mode control, the compressor rotation speed falls below a predetermined level during the cooling operation in the gradual increase region, and the difference between the air conditioning target temperature and the indoor detected temperature is a predetermined value. It is provided between the outdoor heat exchanger and the indoor heat exchanger when the state becomes below or when the indoor detected humidity exceeds the set humidity based on the operation at bedtime for a predetermined time or longer. An over-throttle cooling operation is performed in which the opening of the electronic expansion valve is set to an over-throttle state than during normal cooling operation.

  Patent Document 2 discloses the following air conditioner. In other words, reheat dry operation of an air conditioner equipped with electric parts such as a refrigeration cycle and an inverter device, an outdoor fan, an indoor fan, etc. composed of a compressor, an outdoor heat exchanger, an indoor heat exchanger, a bypass valve, a bleed port valve, etc. When cooling the inverter device, heat exchange in the outdoor heat exchanger is minimized, and the amount of refrigerant sent to the indoor heat exchanger is increased.

  Patent Document 3 discloses the following air conditioner. That is, the air conditioner diverts the refrigerant obtained by the compressor through the outdoor heat exchanger, the expansion valve, and the flow divider, and supplies the diverted refrigerant to the two refrigerant paths from the inlet by inserting an open / close valve in one refrigerant path. A refrigeration cycle that circulates to the compressor through an indoor heat exchanger is configured. In addition, the air conditioner is provided with a temperature sensor that detects the temperature of the outlet of the expansion valve and the temperature of the intermediate portion of the indoor heat exchanger, and controls the compressor at a low speed during the dehumidifying operation. The on-off valve is controlled to open or close according to the difference. In addition, the air conditioner controls indoor heat exchange by controlling the expansion amount of the expansion valve so that the temperature difference between the temperature of the outlet of the expansion valve and the temperature of the intermediate portion of the indoor heat exchanger is a predetermined reference value. Variable control of the liquid area of the refrigerant flowing in the chamber, and switching the dehumidification capacity in stages.

  Patent Document 4 discloses the following air conditioner. That is, the air conditioner connects an outdoor unit having a variable capacity compressor, a four-way valve, an outdoor heat exchanger, and a pressure reducer, and an indoor unit having an indoor heat exchanger to each other. The angle of the wind direction change blade provided rotatably is set at or near the closed position where the air outlet of the indoor unit is closed.

Japanese Patent No. 3999608 JP 2001-280668 A Japanese Patent No. 3446792 Japanese Patent No. 3011708

  However, in the air conditioning apparatus as described above, when the temperature setting is high and it is difficult to perform the cooling operation, it is difficult to realize the appropriate temperature and the appropriate humidity, and further improvement is necessary.

  The present disclosure has been made in order to solve the above-described problem, and provides an air conditioner and an air conditioning control method capable of realizing appropriate temperature and humidity even at a high temperature setting in which cooling operation is difficult to operate. It is intended to provide.

  An air conditioner according to an aspect of the present disclosure has a first absolute humidity indicating a target absolute humidity determined from a first temperature indicating a preset temperature and a first relative humidity indicating a preset relative humidity. A first acquisition unit to acquire; a second acquisition unit to acquire a dew point temperature determined from the first temperature and the first relative humidity; a second temperature indicating an indoor temperature; and the relative humidity in the indoor A third acquisition unit that acquires a second absolute humidity indicating the indoor absolute humidity determined from the second relative humidity, a heat exchanger that exchanges heat between the indoor air and the refrigerant, and the heat exchanger When the air blower that blows the cooled air, the air outlet for blowing the air blown by the air blower into the room, and the second absolute humidity exceeds the first absolute humidity, Stop the blowing of the blowing unit, close the blowing port, The serial heat exchanger and a control unit for controlling the dehumidifying operation to the cooling at the dew point temperature.

  By the said aspect, even if it is a high temperature setting at which air_conditionaing | cooling operation does not operate | move easily, suitable temperature and suitable humidity are realizable.

It is a figure which shows an example of the state change of the room temperature, indoor relative temperature, and bed temperature during a test subject sleeping in a bedroom. It is a block diagram which shows an example of a structure of the air conditioning apparatus in Embodiment 1 of this indication. It is a figure which shows an example of the absolute humidity conversion table used in order for the absolute humidity setting value calculation part shown in FIG. 2 to obtain | require absolute humidity. It is a figure which shows an example of the dew point temperature conversion table used in order that the dew point temperature calculation part shown in FIG. 2 calculates | requires dew point temperature. It is a flowchart which shows an example of the humidity control process of the air conditioning apparatus shown in FIG. It is a flowchart which shows an example of the forced dew condensation dehumidification operation process shown in FIG. It is a figure which shows an example of the operation state of the air conditioning apparatus shown in FIG. It is a flowchart which shows another example of the forced dew condensation dehumidification driving | running process shown in FIG. It is a figure which shows an example of the operation state of the air conditioning apparatus at the time of performing the forced dew condensation dehumidification operation process shown in FIG. It is a block diagram which shows an example of a structure of the air conditioning apparatus in Embodiment 2 of this indication. It is a flowchart which shows an example of the humidity control process of the air conditioning apparatus shown in FIG. It is a figure which shows an example of the operation state of the air conditioning apparatus shown in FIG.

(Knowledge that became the basis of this disclosure)
In the above-mentioned Patent Document 1, there is a problem that the cooling operation stop period increases around the dawn of summer and the user feels uncomfortable when the humidity increases.

  Moreover, in Patent Document 2, after operating the cooling operation, the room is reheated to the set temperature of the user and blown into the room so that the room is not too cold, and both the appropriate temperature and the appropriate humidity can be achieved. Since it reheats after air_conditioning | cooling, there existed a subject that energy efficiency was bad.

  Further, in Patent Document 3, two heat exchangers are provided in an indoor unit, one heat exchanger is controlled for cooling at a higher temperature, and the other heat exchanger is controlled for dehumidifying at a lower temperature. However, since dehumidification is performed so that the cooling temperature is not excessively cooled, and a dedicated heat exchanger that can control the cooling temperature is used by dividing the region, there is a problem that the cost of the heat exchanger increases.

  Also, in Patent Document 4, the air outlet of the indoor unit is closed to suppress the feeling of cold air. However, since the cooling operation is a normal operation, the uncomfortable feeling of increased humidity at dawn in summer is similar to Patent Document 1. There was a problem of remaining.

  The inventors of the present application paying attention to the above-mentioned problems, and as a result of diligent study on the sleep environment through subject experiments, the cooling operation based on the sleep mode as described above is a factor that alienates comfortable sleep at the dawn of summer As one of the above, it was found that the increase in humidity had an effect. FIG. 1 is a diagram illustrating an example of a state change of a room temperature, a room relative temperature, and a bed temperature when a subject sleeps in a bedroom.

  As shown in FIG. 1, first, at the cooling operation start time t1, the temperature of the cooling operation of the air conditioner is set to 27 ° C., and the room temperature RT is reduced to 27 ° C. Thereafter, at the bedtime t2, the temperature of the cooling operation is changed to 28 ° C., and the subject enters the bed and goes to bed. Next, the cooling operation is in an operation stop state until the cooling operation operation start time t3 when the room temperature RT becomes 2 ° C. which is 2 ° C. higher than the set temperature 28 ° C., and at the cooling operation operation start time t3, the cooling operation is in the operation state. Become. Next, when the room temperature RT reaches the set temperature of 28 ° C. at the cooling operation stop time t4, the cooling operation is stopped. Thereafter, the cooling operation is started at the cooling operation start time t5, the cooling operation is stopped at the cooling operation stop time t6, and the start and stop of the cooling operation are repeated.

  At this time, since there is no direct light, the outdoor temperature at night, that is, the outdoor temperature, is 30 ° C. or lower even in summer, and becomes the lowest temperature at dawn, sometimes 25 ° C. or lower. When the outdoor temperature is lower than the set temperature of the indoor cooling operation, the period until the indoor temperature reaches the operation start temperature of the cooling operation becomes longer. When the stop state of the cooling operation becomes longer, the dehumidifying performance by the air conditioner decreases, and the indoor relative humidity IH gradually increases.

  Here, the bed temperature BT and the room temperature RT do not change so much, but at the uncomfortable relative humidity start time t7, the indoor relative humidity IH exceeds 60%, and an unpleasant period UP in which the relative humidity exceeds 60% occurs. Therefore, even at the time when it is originally desired to sleep, a situation occurs in which the subject is sleepy and gets up at time t8. As a result, it was found that air conditioning control that balances the optimal temperature and humidity (in the 50% range) of the sleeping bedroom is important. In addition, in FIG. 1, although the preset temperature of the cooling operation at the time of going to bed was made into the example of 28 degreeC, other than this may be sufficient. In addition, although the room temperature at the start of the cooling operation is an example of the set temperature + 2 ° C., it may be slightly different depending on the specifications of the manufacturer of the air conditioner.

  Based on the results of the above-described subject experiment, the inventors of the present application have determined how to achieve optimal temperature and appropriate humidity with high energy efficiency and low cost without excessively cooling the sensory temperature when the cooling operation is difficult to operate. The present disclosure has been completed as a result of diligent examination as to whether or not to achieve the above.

  An air conditioner according to an aspect of the present disclosure has a first absolute humidity indicating a target absolute humidity determined from a first temperature indicating a preset temperature and a first relative humidity indicating a preset relative humidity. A first acquisition unit to acquire; a second acquisition unit to acquire a dew point temperature determined from the first temperature and the first relative humidity; a second temperature indicating an indoor temperature; and the relative humidity in the indoor A third acquisition unit that acquires a second absolute humidity indicating the indoor absolute humidity determined from the second relative humidity, a heat exchanger that exchanges heat between the indoor air and the refrigerant, and the heat exchanger When the air blower that blows the cooled air, the air outlet for blowing the air blown by the air blower into the room, and the second absolute humidity exceeds the first absolute humidity, Stop the blowing of the blowing unit, close the blowing port, The serial heat exchanger and a control unit for controlling the dehumidifying operation to the cooling at the dew point temperature.

  With such a configuration, the first absolute humidity indicating the target absolute humidity determined from the first temperature indicating the preset temperature and the first relative humidity indicating the preset relative humidity is acquired, and the first temperature is obtained. And a first absolute humidity, a dew point temperature determined from the first relative humidity and a second absolute humidity indicating the indoor absolute humidity determined from the second temperature indicating the indoor temperature and the second relative humidity indicating the indoor relative humidity To get. Here, when the second absolute humidity exceeds the first absolute humidity, the blowing of the air blowing unit that blows the air cooled by the heat exchanger that exchanges heat between the indoor air and the refrigerant is stopped, A dehumidifying operation is performed in which a blower opening for blowing the air blown by the blower into the room is closed and the heat exchanger is cooled at the dew point temperature. Therefore, appropriate temperature and appropriate humidity can be realized without the body temperature being too cold. Moreover, since the reheating process for preventing overcooling is not performed, the humidity control of the air conditioner with high energy efficiency can be performed. In addition, since no special heat exchanger is used, the humidity of the air conditioner can be controlled without increasing the component cost. As a result, even at a higher temperature setting at which the cooling operation is difficult to operate, the appropriate temperature and the appropriate humidity can be realized with high energy efficiency and low cost without the sensible temperature being too cold.

  The first acquisition unit includes a first calculation unit that acquires the first temperature and the first relative humidity, and calculates the first absolute humidity from the first temperature and the first relative humidity. 2 acquisition unit includes a second calculation unit that acquires the first temperature and the first relative humidity, and calculates the dew point temperature from the first temperature and the first relative humidity, the third acquisition unit is A third calculation unit that acquires the second temperature and the second relative humidity and calculates the second absolute humidity from the second temperature and the second relative humidity may be included.

  With such a configuration, the first temperature and the first relative humidity are acquired, the first relative humidity is calculated from the first temperature and the first relative humidity, and the dew point temperature is calculated from the first temperature and the first relative humidity. Calculate the second temperature and the second relative humidity, and calculate the second absolute humidity from the second temperature and the second relative humidity. For this reason, the target absolute humidity, the dew point temperature, and the indoor absolute humidity can be obtained with high accuracy.

  The controller may continue cooling the heat exchanger while the second absolute humidity exceeds the first absolute humidity.

  With such a configuration, the heat exchanger continues to be cooled while the second absolute humidity exceeds the first absolute humidity, so that the room can be maintained at an appropriate temperature and an appropriate humidity.

  The controller may continue cooling the heat exchanger while the temperature of the heat exchanger does not fall below the dew point temperature.

  With such a configuration, since the cooling of the heat exchanger is continued while the temperature of the heat exchanger does not fall below the dew point temperature, the room can be maintained at a suitable temperature and humidity.

  The air conditioner further includes a fourth acquisition unit that acquires a third temperature indicating an outdoor temperature, and the control unit is configured such that the first temperature or the second temperature exceeds the third temperature. In addition, the dehumidifying operation may be started.

  With such a configuration, the third temperature indicating the outdoor temperature is acquired, and the dehumidifying operation is started when the first temperature or the second temperature exceeds the third temperature. For this reason, when the preset temperature or the room temperature is higher than the outdoor temperature, the dehumidifying operation can be started, and the room can be brought into an appropriate temperature and humidity state.

  In the dehumidifying operation, the control unit controls the heat exchanger so that the temperature of the heat exchanger is within a predetermined range including the dew point temperature after the second absolute humidity reaches the first absolute humidity. You may make it cool.

  With such a configuration, after the second absolute humidity reaches the first absolute humidity during the dehumidifying operation, the heat exchanger is cooled so that the temperature of the heat exchanger falls within a predetermined range including the dew point temperature. For this reason, it is possible to maintain the room at a suitable temperature and humidity while preventing the room temperature from becoming too cold.

  In addition, an air conditioner according to another aspect of the present disclosure includes a first acquisition unit that acquires a first temperature that indicates a preset temperature, and a second acquisition unit that acquires a second temperature that indicates an indoor temperature. A heat exchanger that exchanges heat between the indoor air and the refrigerant, a blower that blows air cooled by the heat exchanger, and a blower that blows air blown by the blower into the room A cooling operation for cooling the heat exchanger so that the second temperature becomes the first temperature, and cooling the heat exchanger. A dehumidifying operation for dehumidifying the room; and a determining unit for determining switching between the cooling operation and the dehumidifying operation, wherein the determining unit is configured to perform the cooling operation adjacent in time series. Depending on the difference between the operation time and the stop time, the cooling operation The determination to switch to the dehumidifying operation, the controller, in response to switching of the determination results to the dehumidifying operation from the cooling operation, switches the cooling operation to the dehumidification operation.

  With such a configuration, a first temperature indicating a preset temperature is acquired, and a second temperature indicating a room temperature is acquired. Further, the air cooled by the heat exchanger that exchanges heat between the indoor air and the refrigerant is blown to the blower that blows air, and the blower opening for blowing the air blown by the blower into the room is opened. The cooling operation for cooling the heat exchanger and the dehumidifying operation for dehumidifying the room by cooling the heat exchanger are controlled so that the two temperatures become the first temperature. At this time, according to the difference between the operation time and the stop time of the adjacent cooling operation in time series, the switching from the cooling operation to the dehumidifying operation is determined, and according to the determination result of the switching from the cooling operation to the dehumidifying operation, Switch the cooling operation to the dehumidifying operation. Therefore, it is possible to switch from the cooling operation to the dehumidifying operation before the indoor relative humidity rises and becomes uncomfortable. As a result, even at a higher temperature setting at which the cooling operation is difficult to operate, it is possible to achieve the appropriate temperature and the appropriate humidity without the sensible temperature being too cold.

  The control unit may stop the blowing of the blowing unit and close the blowing port during the dehumidifying operation.

  With such a configuration, during the dehumidifying operation, the blowing of the blowing unit is stopped and the blowing port is closed. For this reason, the dehumidified cool air is not blown directly into the room, and the room can be brought into a proper temperature and humidity state.

  The operation time of the cooling operation may include the cooling time of the heat exchanger.

  With such a configuration, switching from the cooling operation to the dehumidifying operation is determined based on the cooling time of the heat exchanger. For this reason, it is possible to surely switch from the cooling operation to the dehumidifying operation before the indoor relative humidity rises and becomes uncomfortable.

  The determination unit may determine switching from the cooling operation to the dehumidifying operation when the difference between the operation time and the stop time of the cooling operation is equal to or greater than a predetermined threshold.

  With such a configuration, when the difference between the operation time and the stop time of the cooling operation is equal to or greater than a predetermined threshold, switching from the cooling operation to the dehumidifying operation is determined. For this reason, it is possible to surely switch from the cooling operation to the dehumidifying operation before the indoor relative humidity rises and becomes uncomfortable.

  The air conditioner includes a third acquisition unit that acquires a first relative humidity that indicates a preset relative humidity, a fourth acquisition unit that acquires a second relative humidity that indicates the relative humidity in the room, and the first A first calculation unit for calculating a first absolute humidity indicating the target absolute humidity in the room from the temperature and the first relative humidity, and a second calculation for calculating a dew point temperature from the first temperature and the first relative humidity. And a third calculation unit for calculating a second absolute humidity indicating the absolute humidity in the room from the second temperature and the second relative humidity, and the control unit performs the dehumidifying operation as the first dehumidifying operation. 2 When the absolute humidity exceeds the first absolute humidity, the blowing of the blowing section may be stopped, the blowing port may be closed, and the heat exchanger may be cooled at the dew point temperature.

  With such a configuration, the first relative humidity indicating the preset relative humidity is acquired, and the second relative humidity indicating the indoor relative humidity is acquired. Further, a first absolute humidity indicating a target absolute humidity in the room is calculated from the first temperature and the first relative humidity, a dew point temperature is calculated from the first temperature and the first relative humidity, and the second temperature and the second relative humidity are calculated. The second absolute humidity indicating the indoor absolute humidity is calculated from the humidity. At this time, as the dehumidifying operation, when the second absolute humidity exceeds the first absolute humidity, the blowing of the blowing unit is stopped, the blowing port is closed, and the heat exchanger is cooled at the dew point temperature. Therefore, it is possible to achieve the appropriate temperature and the appropriate humidity without the body temperature being too cold. Moreover, since the reheating process for preventing overcooling is not performed, the humidity operation of the air conditioner with high energy efficiency can be performed. In addition, since no special heat exchanger is used, the humidity operation of the air conditioner can be performed without increasing the component cost. As a result, even at a higher temperature setting at which the cooling operation is difficult to operate, the appropriate temperature and the appropriate humidity can be realized with high energy efficiency and low cost without the sensible temperature being too cold.

  In addition, an air conditioner according to another aspect of the present disclosure includes a first acquisition unit that acquires a first temperature that indicates a preset temperature, and a second acquisition unit that acquires a second temperature that indicates an indoor temperature. A third acquisition unit that acquires a third temperature indicating an outdoor temperature, a heat exchanger that exchanges heat between the indoor air and the refrigerant, and a blowing unit that blows air cooled by the heat exchanger, The air blower for blowing the air blown by the blower into the room, and the blower blows the air so that the blower is opened and the second temperature becomes the first temperature. A control unit for controlling a cooling operation for cooling the exchanger, a dehumidifying operation for cooling the heat exchanger to dehumidify the room, a determination unit for determining switching between the cooling operation and the dehumidifying operation, The determination unit includes the first temperature or the second temperature and the first temperature. The control unit determines switching from the cooling operation to the dehumidifying operation according to a difference from temperature, and the control unit determines the cooling operation from the cooling operation to the dehumidifying operation according to a determination result of switching from the cooling operation to the dehumidifying operation. Switch to driving.

  With such a configuration, a first temperature indicating a preset temperature is acquired, a second temperature indicating an indoor temperature is acquired, and a third temperature indicating an outdoor temperature is acquired. Further, the air cooled by the heat exchanger that exchanges heat between the indoor air and the refrigerant is blown to the blower that blows air, and the blower opening for blowing the air blown by the blower into the room is opened. The cooling operation for cooling the heat exchanger and the dehumidifying operation for dehumidifying the room by cooling the heat exchanger are controlled so that the two temperatures become the first temperature. At this time, the switching from the cooling operation to the dehumidifying operation is determined according to the first temperature or the difference between the second temperature and the third temperature, and the cooling operation is determined according to the determination result of the switching from the cooling operation to the dehumidifying operation. Is switched to dehumidifying operation. Therefore, it is possible to switch from the cooling operation to the dehumidifying operation before the indoor relative humidity rises and becomes uncomfortable. As a result, even at a higher temperature setting at which the cooling operation is difficult to operate, it is possible to achieve the appropriate temperature and the appropriate humidity without the sensible temperature being too cold.

  The control unit may stop the blowing of the blowing unit and close the blowing port during the dehumidifying operation.

  With such a configuration, during the dehumidifying operation, the blowing of the blowing unit is stopped and the blowing port is closed. For this reason, the dehumidified cool air is not blown directly into the room, and the room can be brought into a proper temperature and humidity state.

  The determination unit may determine switching from the cooling operation to the dehumidifying operation when a difference between the first temperature or the second temperature and the third temperature is equal to or greater than a predetermined threshold. .

  With such a configuration, when the difference between the first temperature or the second temperature and the third temperature is equal to or greater than a predetermined threshold, switching from the cooling operation to the dehumidifying operation is determined. For this reason, it is possible to surely switch from the cooling operation to the dehumidifying operation before the indoor relative humidity rises and becomes uncomfortable.

  In addition, the present disclosure can be realized not only as an air conditioner having the above-described characteristic configuration, but also by using a processor or the like to perform characteristic processing corresponding to the characteristic configuration included in the air-conditioning apparatus. It can also be realized as an air conditioning control method for executing Therefore, also in the following other aspects, the same effect as the above air conditioner can be obtained.

  An air conditioning control method according to another aspect of the present disclosure includes a heat exchanger that exchanges heat between indoor air and refrigerant using a processor, a blower that blows air cooled by the heat exchanger, A method for controlling an air conditioner comprising a blower opening for blowing air blown into a room by a blower, wherein a first temperature indicating a preset temperature and a preset relative humidity are indicated. A first absolute humidity indicating a target absolute humidity determined from the first relative humidity is acquired, a dew point temperature determined from the first temperature and the first relative humidity is acquired, and a first temperature indicating the indoor temperature is obtained. 2nd absolute humidity which shows the absolute humidity of the said room determined from 2 temperature and 2nd relative humidity which shows the relative humidity of the said room is acquired, and the said 2nd absolute humidity exceeds the said 1st absolute humidity In the case, the blowing of the blowing unit is stopped, To close the serial air blowing port, and controls the dehumidifying operation of cooling the heat exchanger at the dew point temperature.

  An air conditioning control method according to another aspect of the present disclosure includes a heat exchanger that exchanges heat between indoor air and refrigerant using a processor, a blower that blows air cooled by the heat exchanger, A method for controlling an air conditioner including an air blowing port for blowing air blown into the room by a blower unit, obtaining a first temperature indicating a preset temperature, and setting the temperature in the room Cooling operation for cooling the heat exchanger so that the second temperature becomes the first temperature, and the heat exchange is acquired. Switching between the dehumidifying operation for cooling the cooler and dehumidifying the room in accordance with the difference between the operation time and the stop time of the adjacent cooling operation in time series, and from the cooling operation to the dehumidifying operation Depending on the switching determination result, the cooling The rolling is switched to the dehumidifying operation.

  Moreover, the air-conditioning control method which concerns on the other aspect of this indication uses the processor, the heat exchanger which heat-exchanges indoor air and a refrigerant | coolant, and the ventilation part which ventilates the air cooled with the said heat exchanger, , A method for controlling an air conditioner comprising a blower opening for blowing air blown by the blower into the room, obtaining a first temperature indicating a preset temperature, Acquiring a second temperature indicating a temperature, acquiring a third temperature indicating an outdoor temperature, causing the blower to blow air, opening the blower opening, and so that the second temperature becomes the first temperature, Switching between the cooling operation for cooling the heat exchanger and the dehumidifying operation for cooling the heat exchanger and dehumidifying the room is performed by changing the difference between the first temperature or the second temperature and the third temperature. Judgment according to the switching from the cooling operation to the dehumidifying operation According to the determination result, it switches the cooling operation to the dehumidification operation.

  It should be noted that each of the embodiments described below shows a comprehensive or specific example. Further, numerical values, shapes, components, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present disclosure. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements. In all the embodiments, the contents can be arbitrarily combined.

  Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

(Embodiment 1)
FIG. 2 is a block diagram illustrating an example of the configuration of the air-conditioning apparatus according to the embodiment of the present disclosure. The air conditioner shown in FIG. 2 is composed of an air conditioner, for example, and includes an indoor unit 200 and an outdoor unit 201.

  The indoor unit 200 includes an indoor relative humidity set value holding unit 202, an indoor temperature set value holding unit 203, an absolute humidity set value calculating unit 204, an indoor relative humidity detecting unit 205, an indoor temperature detecting unit 206, an absolute humidity calculating unit 207, an absolute Humidity comparison unit 208, dew point temperature calculation unit 209, indoor temperature comparison unit 210, heat exchanger temperature set value calculation unit 211, heat exchanger set temperature selection unit 212, indoor / outdoor temperature comparison unit 214, operation mode determination unit 215, heat Exchanger temperature detection unit 216, heat exchanger temperature comparison determination unit 217, indoor heat exchanger 220, indoor unit fan / outlet operation setting holding unit 221, indoor unit fan / outlet operation determination unit 222, indoor unit fan / outlet A mouth control unit 223, an indoor unit fan 224, and an outlet 225 are provided. The outdoor unit 201 includes an outdoor temperature detection unit 213, a compressor 218, and a compressor control unit 219.

  The indoor relative humidity set value holding unit 202 acquires and holds the set value of the relative humidity in the room such as a bedroom set by the user or the manufacturer of the air conditioner as the set relative humidity U1. The set relative humidity U1 is an example of a first relative humidity indicating a preset relative humidity.

  Here, the relative humidity is expressed by [% RH] as a value indicating how much water is contained compared to the maximum amount of water (saturated water vapor amount) that can be contained in air at a certain temperature. For example, a relative humidity of 100% RH is a state in which “water vapor is no longer included in the air” (saturated air). The amount of saturated water vapor increases as the temperature increases, and decreases as the temperature decreases. Therefore, even with the same amount of water, the relative humidity changes as the temperature changes. When the indoor relative humidity exceeds 60% RH, it becomes difficult to fall asleep. Therefore, a value in the range of 50 to 60% RH can be used as the set relative humidity U1. In the present embodiment, for example, 50% RH is used. The set relative humidity U1 is not particularly limited to this example, and various values that the user feels as pleasant humidity can be used.

  The room temperature set value holding unit 203 acquires and holds a set value of the temperature of the room such as a bedroom set by the user or the manufacturer of the air conditioner as the set temperature T1. The set temperature T1 is an example of a first temperature indicating a preset temperature.

  The absolute humidity set value calculation unit 204 acquires a target absolute humidity D1 determined from the set temperature T1 and the set relative humidity U1. Specifically, the absolute humidity set value calculating unit 204 acquires the set temperature T1 from the indoor temperature set value holding unit 203, acquires the set relative humidity U1 from the indoor relative humidity set value holding unit 202, and sets the set temperature T1. The target absolute humidity D1 is calculated from the set relative humidity U1. The target absolute humidity D1 is an example of a first absolute humidity indicating a target absolute humidity in the room that is a target value.

Here, the absolute humidity includes a weight absolute humidity (kg / kg (DA)) representing the amount of water vapor (kg) in 1 kg of dry air and a volume absolute humidity (g) representing the amount of water vapor (g) in 1 m ^{3 of} air. / M ³ ). Even if the temperature changes, the absolute humidity value does not change. In the present embodiment, for example, the absolute volume humidity (g / m ³ ) is used as the target absolute humidity D1. Specifically, a conversion table showing a correspondence relationship between main temperatures, relative humidity, and absolute humidity is created in advance using an air diagram (graph) showing the Tetens equation, and absolute humidity is calculated using this conversion table. Is calculated.

  FIG. 3 is a diagram illustrating an example of an absolute humidity conversion table used by the absolute humidity set value calculation unit 204 illustrated in FIG. 2 to obtain absolute humidity. In FIG. 3, the unit of relative humidity is simply expressed as [%] for easy notation.

The absolute humidity set value calculation unit 204 stores the absolute humidity conversion table shown in FIG. 3 in an internal memory or the like in advance, and the target absolute humidity is calculated from the room temperature indicated by the set temperature T1 and the relative humidity indicated by the set relative humidity U1. D1 is calculated. For example, when the room temperature indicated by the set temperature T1 is 28 ° C. and the relative humidity indicated by the set relative humidity U1 is 50%, 11.8 g / m ³ is calculated as the target absolute humidity D1.

  The absolute humidity conversion table shown in FIG. 3 is obtained by replacing the arithmetic expression with a table, but is not particularly limited to this example. For example, a conversion table multiplied by an adjustment coefficient may be used according to the manufacturer specifications of the air conditioner, the size of the bedroom, the positional relationship between the air conditioner and the bed, and the like. Moreover, the calculation method of absolute humidity is not specifically limited to said example. For example, various modifications such as calculation using an approximate expression such as a well-known Tetens expression are possible. Regarding these points, the same applies to the absolute humidity calculation unit 207 described later.

  The indoor relative humidity detection unit 205 includes a humidity sensor and the like, and detects and acquires the relative humidity in the room where the indoor unit 200 is installed as the indoor relative humidity U2. The indoor relative humidity U2 is an example of the second relative humidity indicating the current relative humidity in the room.

  The indoor temperature detection unit 206 includes a temperature sensor or the like, and detects and acquires the indoor temperature such as a bedroom in which the indoor unit 200 is installed as the indoor temperature T2. The room temperature T2 is an example of a second temperature indicating the current room temperature.

  The absolute humidity calculating unit 207 acquires the indoor absolute humidity D2 determined from the indoor temperature T2 and the indoor relative humidity U2. Specifically, the absolute humidity calculation unit 207 acquires the room temperature T2 from the room temperature detection unit 206, acquires the room relative humidity U2 from the room relative humidity detection unit 205, and determines from the room temperature T2 and the room relative humidity U2. The indoor absolute humidity D2 is calculated. The indoor absolute humidity D2 is an example of a second absolute humidity indicating the current absolute humidity in the room. In the present embodiment, the absolute humidity calculation unit 207 uses the absolute humidity conversion table shown in FIG. 3 as in the absolute humidity set value calculation unit 204, for example, to calculate the indoor absolute from the indoor temperature T2 and the indoor relative humidity U2. The humidity D2 is calculated.

  The absolute humidity comparison unit 208 compares the current indoor absolute humidity D2 calculated by the absolute humidity calculation unit 207 with the target absolute humidity D1 calculated by the absolute humidity set value calculation unit 204, and calculates the target from the current indoor absolute humidity D2. An absolute humidity difference Δt4 obtained by subtracting the absolute humidity D1 is calculated.

  The dew point temperature calculation unit 209 acquires a dew point temperature TD determined from the set temperature T1 and the set relative humidity U1. Specifically, the dew point temperature calculating unit 209 acquires the set temperature T1 from the indoor temperature set value holding unit 203, acquires the set relative humidity U1 from the indoor relative humidity set value holding unit 202, and sets the relative temperature to the set temperature T1. The dew point temperature TD is calculated from the humidity U1.

  Here, the dew point temperature refers to a temperature at which moisture in the air begins to condense by cooling the air. That is, the dew point temperature is the temperature of air when the relative humidity is 100% RH. In the present embodiment, for example, a conversion table showing a correspondence relationship between temperature (dry bulb), relative humidity, and dew point temperature is created in advance, and the dew point temperature is calculated using this conversion table.

  FIG. 4 is a diagram illustrating an example of a dew point temperature conversion table used by the dew point temperature calculation unit 209 illustrated in FIG. 2 to obtain the dew point temperature. In FIG. 4, the unit of relative humidity is simply expressed as [%] for easy notation.

  The dew point temperature calculation unit 209 stores the dew point temperature conversion table shown in FIG. 4 in an internal memory or the like in advance, and calculates the dew point temperature TD from the room temperature indicated by the set temperature T1 and the relative humidity indicated by the set relative humidity U1. To do. For example, when the room temperature indicated by the set temperature T1 is 28 ° C. and the relative humidity indicated by the set relative humidity U1 is 50%, 16.6 ° C. is calculated as the dew point temperature TD.

  The dew point temperature conversion table shown in FIG. 4 is obtained by replacing the arithmetic expression with a table, but is not particularly limited to this example. For example, a conversion table multiplied by an adjustment coefficient may be used depending on the manufacturer specifications of the air conditioner, the size of the bedroom, the positional relationship between the air conditioner and the bed, and the like. Moreover, the calculation method of dew point temperature is not specifically limited to said example. For example, various modifications such as calculation using a known approximate expression are possible.

  The room temperature comparison unit 210 compares the room temperature T2 detected by the room temperature detection unit 206 with the set temperature T1 acquired from the room temperature set value holding unit 203, and subtracts the set temperature T1 from the room temperature T2. The difference Δt1 is calculated.

  The heat exchanger temperature set value calculation unit 211 calculates a set temperature HT for the cooling operation mode of the indoor heat exchanger 220 based on the set temperature difference Δt1.

  The outdoor temperature detection unit 213 includes a temperature sensor or the like, and detects and acquires the outdoor temperature where the outdoor unit 201 is installed, that is, the outdoor temperature, as the outdoor temperature T3. The outdoor temperature T3 is an example of a third temperature indicating the outdoor temperature.

  The indoor / outdoor temperature comparison unit 214 compares the set temperature T1 acquired from the indoor temperature set value holding unit 203 with the current outdoor temperature T3 detected by the outdoor temperature detection unit 213, and subtracts the outdoor temperature T3 from the set temperature T1. The internal / external temperature difference Δt2 is calculated. The internal / external temperature difference Δt2 is not particularly limited to the above example. For example, the indoor / outdoor temperature comparison unit 214 compares the current indoor temperature T2 detected by the indoor temperature detection unit 206 with the current outdoor temperature T3 detected by the outdoor temperature detection unit 213, and compares the indoor temperature T2 with the outdoor temperature T3. A value obtained by subtracting may be calculated as the internal / external temperature difference Δt2. In this example, when the indoor temperature T2 can be accurately detected, the switching from the cooling operation mode described later to the forced condensation dehumidification operation mode can be accurately determined, and the indoor temperature is surely set to an appropriate temperature and humidity. be able to.

  Based on the internal / external temperature difference Δt2, the operation mode determination unit 215 determines which one of the cooling operation mode, the forced condensation dehumidification operation mode, and the like is the current operation mode. Here, the operation of the air conditioner in the cooling operation mode is an example of the cooling operation, and the operation of the air conditioner in the forced condensation dehumidification operation mode is an example of the dehumidification operation.

  Specifically, when the internal / external temperature difference Δt2 is equal to or greater than a predetermined threshold 3 (for example, 3 ° C.), the operation mode determination unit 215 determines that the current operation mode is the forced condensation / dehumidification operation mode, and the internal / external temperature difference Δt2 Is not greater than or equal to the threshold 3, the current operation mode is determined as the cooling operation mode. The threshold 3 is not particularly limited to the above example, and various values can be used.

  After determining that the current operation mode is the forced dew condensation and dehumidification operation mode, the operation mode determination unit 215 determines that the current operation mode is the cooling operation mode when the internal / external temperature difference Δt2 is equal to or less than a predetermined threshold 6 (eg, 0 ° C.) When the internal / external temperature difference Δt2 is not equal to or less than the threshold value 6, the current operation mode is determined to be the forced condensation dehumidification operation mode. The threshold 6 is not particularly limited to the above example, and various values can be used.

  The indoor unit fan / air outlet operation setting holding unit 221 holds and stores in advance the operation states of the indoor unit fan 224 and the air outlet 225 which are set for each operation mode such as the cooling operation mode and the forced condensation dehumidification operation mode. ing.

  The indoor unit fan / air outlet operation determining unit 222 refers to the indoor unit fan / air outlet operation setting holding unit 221 and determines the indoor unit fan 224 and the air outlet 225 corresponding to the operation mode determined by the operation mode determining unit 215. Determine operation.

  The indoor unit fan / air outlet control unit 223 controls the operations of the indoor unit fan 224 and the air outlet controller 223 so that the operation determined by the indoor unit fan / air outlet operation determining unit 222 is performed.

  The indoor unit fan 224 is an example of a blower that blows air cooled by the indoor heat exchanger 220. The indoor unit fan 224 blows air cooled by the indoor heat exchanger 220 in the cooling operation mode, and stops blowing in the forced condensation dehumidification operation mode.

  The blowout port 225 is an example of a blower port for blowing air blown by the indoor unit fan 224 into the room. The air outlet 225 is composed of a louver or the like. The air outlet 225 is opened when in the cooling operation mode, adjusts the direction of air blown into the room by the indoor unit fan 224, and is closed when in the forced condensation / dehumidification operation mode.

  Specifically, when the operation mode determination unit 215 determines that the operation mode is the cooling operation mode, the indoor unit fan / air outlet control unit 223 causes the indoor unit fan 224 to blow air and opens the air outlet 225. When the operation mode determination unit 215 determines that the forced dew condensation and dehumidification operation mode is selected, the indoor unit fan / air outlet control unit 223 stops the indoor unit fan 224 and closes the air outlet 225.

  In addition, the operation | movement of forced dew condensation dehumidification driving | operation is not specifically limited to said example. For example, the indoor unit fan 224 may be blown or the outlet 225 may be opened during the forced dew condensation dehumidifying operation. In addition, a known dehumidifying operation may be used instead of the forced condensation dehumidifying operation. As a known dehumidifying operation method, there are a method of sending air cooled by a heat exchanger as it is for dehumidification and a method of sending out the air after warming the air cooled by a heat exchanger, Any type of dehumidifying operation may be used. For example, a weak cooling and dehumidifying operation such as an over-throttle cooling operation disclosed in Patent Document 1 may be used as the former method, and a reheat drying disclosed in Patent Document 2 described above may be used as the latter method. Driving may be used.

  The heat exchanger set temperature selection unit 212 selects the set temperature HT for the cooling operation mode calculated by the heat exchanger temperature set value calculation unit 211 when the operation mode determination unit 215 determines the cooling operation mode. The heat exchanger set temperature selection unit 212 selects the dew point temperature TD calculated by the dew point temperature calculation unit 209 when the operation mode determination unit 215 determines that the operation mode is the forced dew condensation dehumidification operation mode.

  The indoor heat exchanger 220 is an example of a heat exchanger that exchanges heat between indoor air and refrigerant. Specifically, the refrigerant discharged from the compressor 218 is used in the cooling operation mode and the forced condensation dehumidification operation mode. An outdoor heat exchanger (not shown) of the outdoor unit 201 acts as a condenser, and the indoor heat exchanger 220 acts as an evaporator to cool indoor air.

  The heat exchanger temperature detection unit 216 includes a temperature sensor or the like, and detects the current temperature T4 of the indoor heat exchanger 220 as the heat exchanger temperature T4.

  When the operation mode determination unit 215 determines the cooling operation mode, the heat exchanger temperature comparison determination unit 217 detects the current temperature T4 of the indoor heat exchanger 220 detected by the heat exchanger temperature detection unit 216, and the heat The set temperature HT for the cooling operation mode selected by the exchanger set temperature selection unit 212 is compared. The heat exchanger temperature comparison determination unit 217 performs indoor heat exchange so that the room temperature T2 becomes the set temperature T1 based on the comparison result between the temperature T4 of the indoor heat exchanger 220 and the set temperature HT for the cooling operation mode. The cooling operation for cooling the cooler 220 is controlled. Specifically, the heat exchanger temperature comparison determination unit 217 uses the compressor control unit 219 to control the rotation of the compressor 218. The compressor control unit 219 controls the rotation speed of the compressor 218 in the cooling operation mode in accordance with a control instruction from the heat exchanger temperature comparison determination unit 217.

  On the other hand, when the operation mode determination unit 215 determines that the forced condensation dehumidification operation mode is in effect, the heat exchanger temperature comparison determination unit 217 detects the current temperature of the indoor heat exchanger 220 detected by the heat exchanger temperature detection unit 216. T4 and the dew point temperature TD selected by the heat exchanger set temperature selection unit 212 are compared. When the current indoor absolute humidity D2 exceeds the target absolute humidity D1, based on the comparison result between the temperature T4 of the indoor heat exchanger 220 and the dew point temperature TD, the heat exchanger temperature comparison determination unit 217 A forced condensation dehumidifying operation for cooling the heat exchanger 220 at the dew point temperature TD is controlled. Specifically, the heat exchanger temperature comparison determination unit 217 uses the compressor control unit 219 to control the rotation of the compressor 218. The compressor control unit 219 controls the rotation speed of the compressor 218 in the forced condensation dehumidifying operation mode in accordance with a control instruction from the heat exchanger temperature comparison determination unit 217.

  Further, the heat exchanger temperature comparison / determination unit 217 starts the forced condensation dehumidifying operation when the set temperature T1 (or the room temperature T2) exceeds the outdoor temperature T3.

  In addition, when the operation mode determination unit 215 determines that the forced condensation dehumidification operation mode is selected, the heat exchanger temperature comparison determination unit 217 determines whether the current indoor absolute humidity D2 exceeds the target absolute humidity D1 Cooling at the dew point temperature TD of the heat exchanger 220 is continued. The heat exchanger temperature comparison / determination unit 217 continues cooling the indoor heat exchanger 220 while the temperature T4 of the indoor heat exchanger 220 does not fall below the dew point temperature TD. Note that the heat exchanger temperature comparison / determination unit 217 determines that the indoor absolute humidity D2 is within a predetermined range including the target absolute humidity D1 after the indoor absolute humidity D2 reaches the target absolute humidity D1 (for example, 0 The indoor heat exchanger 220 may be cooled so as to be within a range of .5 ° C.

  Specifically, when the operation mode is the cooling operation mode, the heat exchanger temperature comparison determination unit 217 determines that the set temperature difference Δt1 calculated by the indoor temperature comparison unit 210 is greater than or equal to a predetermined threshold 1 (for example, 2 ° C.). Judge whether there is. The threshold 1 is not particularly limited to the above example, and various values can be used.

  When the set temperature difference Δt1 is equal to or greater than the threshold value 1, the heat exchanger temperature comparison determination unit 217 uses the compressor control unit 219 to turn on the compressor 218 and cool the indoor heat exchanger 220 at the set temperature HT. . On the other hand, when the set temperature difference Δt1 is not equal to or greater than the threshold value 1, the heat exchanger temperature comparison determination unit 217 uses the compressor control unit 219 to turn off the compressor 218.

  The heat exchanger temperature comparison / determination unit 217 determines whether or not the set temperature difference Δt1 is equal to or less than a predetermined threshold 2 (for example, 0 ° C.) after the compressor 218 is turned on. The threshold 2 is not particularly limited to the above example, and various values can be used.

  When the set temperature difference Δt1 is equal to or smaller than the threshold value 2, the heat exchanger temperature comparison determination unit 217 uses the compressor control unit 219 to turn off the compressor 218. On the other hand, when the set temperature difference Δt1 is not equal to or less than the threshold value 2, the heat exchanger temperature comparison / determination unit 217 continues the ON operation of the compressor 218 and continues cooling the indoor heat exchanger 220 at the set temperature HT. As a result, the compressor 218 repeats an operation that is turned on when the set temperature difference Δt1 is equal to or greater than the threshold value 1 and is turned off when the set temperature difference Δt1 is equal to or less than the threshold value 2. In this way, the cooling operation is performed so that the room temperature T2 becomes the set temperature T1.

  On the other hand, when the operation mode is the forced dew condensation dehumidifying operation mode, the heat exchanger temperature comparison determination unit 217 selects the heat exchanger temperature T4 detected by the heat exchanger temperature detection unit 216 and the heat exchanger set temperature selection unit 212. The dew point temperature TD is compared, and a heat exchanger temperature difference Δt3 is calculated by subtracting the target dew point temperature TD from the current heat exchanger temperature T4. The heat exchanger temperature comparison determination unit 217 determines whether or not the heat exchanger temperature difference Δt3 is greater than a predetermined threshold 4 (for example, 0 ° C.). The threshold 4 is not particularly limited to the above example, and various values can be used.

  When the heat exchanger temperature difference Δt3 is larger than the threshold value 4, the heat exchanger temperature comparison determination unit 217 uses the compressor control unit 219 to turn on the compressor 218 and cool the indoor heat exchanger 220 at the dew point temperature TD. To do. On the other hand, when the heat exchanger temperature difference Δt3 is not larger than the threshold value 4, the heat exchanger temperature comparison determination unit 217 uses the compressor control unit 219 to turn off the compressor 218.

The heat exchanger temperature comparison / determination unit 217 determines whether or not the absolute humidity difference Δt4 is greater than a predetermined threshold value 5 (for example, 0 g / m ³ ) after the compressor 218 is turned on. When the absolute humidity difference Δt4 is not greater than the threshold value 5, the heat exchanger temperature comparison determination unit 217 uses the compressor control unit 219 to turn off the compressor 218. The threshold value 5 is not particularly limited to the above example, and various values can be used.

  As described above, the operation mode determination unit 215 determines switching from the cooling operation to the forced condensation dehumidification operation according to the difference between the set temperature T1 (or the indoor temperature T2) and the outdoor temperature T3. Specifically, the operation mode determination unit 215 determines switching from the cooling operation to the forced condensation dehumidification operation when the difference between the set temperature T1 (or indoor temperature T2) and the outdoor temperature T3 is equal to or greater than the threshold value 3. .

  Further, the heat exchanger temperature comparison / determination unit 217 and the indoor unit fan / air outlet control unit 223 cause the indoor unit fan 224 to blow air and open the air outlet 225 so that the indoor temperature T2 becomes the set temperature T1. The cooling operation for cooling the heat exchanger 220 is controlled. The heat exchanger temperature comparison / determination unit 217 and the indoor unit fan / air outlet control unit 223 stop the indoor unit fan 224, close the air outlet 225, cool the indoor heat exchanger 220 at the dew point temperature TD, and Controls forced condensation and dehumidification operation to perform dehumidification. Then, the heat exchanger temperature comparison determination unit 217 and the indoor unit fan / air outlet control unit 223 switch the cooling operation to the forced condensation dehumidification operation according to the switching determination result of the operation mode determination unit 215.

  In the present embodiment, the absolute humidity set value calculation unit 204 is an example of a first acquisition unit or a first calculation unit, and the dew point temperature calculation unit 209 is an example of a second acquisition unit or a second calculation unit, The absolute humidity calculation unit 207 is an example of a third acquisition unit or a third calculation unit, and the heat exchanger temperature comparison determination unit 217 and the indoor unit fan / air outlet control unit 223 are examples of a control unit. The outdoor temperature detection unit 213 is an example of a fourth acquisition unit.

  The indoor temperature set value holding unit 203 is an example of another first acquisition unit, the indoor temperature detection unit 206 is an example of another second acquisition unit, and the outdoor temperature detection unit 213 is a different first acquisition unit. 3 is an example of an acquisition unit. The operation mode determination unit 215 is an example of a determination unit, and the heat exchanger temperature comparison determination unit 217 and the indoor unit fan / air outlet control unit 223 are examples of another control unit.

  Here, an absolute humidity set value calculation unit 204, a dew point temperature calculation unit 209, an absolute humidity calculation unit 207, an indoor temperature set value holding unit 203, an operation mode determination unit 215, a heat exchanger temperature comparison determination unit 217, and an indoor unit fan / The outlet control unit 223 and the like are constituted by, for example, a processor, a memory, and the like. In the present embodiment, absolute humidity set value calculation unit 204, dew point temperature calculation unit 209, absolute humidity calculation unit 207, operation mode determination unit 215, heat exchanger temperature comparison determination unit 217, and indoor unit fan / air outlet Although the control unit 223 and the like are built in the indoor unit 200, the present invention is not particularly limited to this example. For example, various modifications such as incorporating some or all of them in the outdoor unit 201 or incorporating them in an external server or the like are possible.

  FIG. 5 is a flowchart illustrating an example of the humidity control process of the air conditioner illustrated in FIG. 2, and FIG. 6 is a flowchart illustrating an example of the forced condensation dehumidifying operation process illustrated in FIG. 5. In the present embodiment, the air conditioning apparatus is switched from the cooling operation to the forced condensation dehumidifying operation by the humidity control process shown in FIG.

  As shown in FIG. 5, first, in step S11, the absolute humidity set value calculation unit 204 is acquired from the indoor temperature set value holding unit 203 using the absolute humidity conversion table shown in FIG. The target absolute humidity D1 is calculated from the set temperature T1 and the set relative humidity U1 acquired from the indoor relative humidity set value holding unit 202.

  Next, in step S12, the dew point temperature calculation unit 209 uses the dew point temperature conversion table shown in FIG. 4 to increase the processing speed, and the set temperature T1 acquired from the indoor temperature set value holding unit 203 and the indoor relative The dew point temperature TD is calculated from the set relative humidity U1 acquired from the humidity set value holding unit 202.

  Here, it is assumed that the operation mode determination unit 215 determines that the current operation mode is the cooling operation mode based on the comparison result of the indoor / outdoor temperature comparison unit 214. In this case, the following cooling operation is performed in steps S13 to S21.

  First, in step S <b> 13, the operation mode determination unit 215 instructs the indoor unit fan / air outlet control unit 223 to set the cooling operation mode, and the indoor unit fan / air outlet control unit 223 sets the setting position of the air outlet 225 to the opening position. To open the air outlet 225.

  Next, in step S14, the indoor unit fan / air outlet control unit 223 controls the set air volume of the indoor unit fan 224 to be in an ON state, and causes the indoor unit fan 224 to start blowing air from the air outlet 225 into the room.

  Next, in step S15, the room temperature comparison unit 210 obtains the room temperature T2 from the room temperature detection unit 206, obtains the set temperature T1 from the room temperature set value holding unit 203, and sets the set temperature T1 from the room temperature T2. A set temperature difference Δt1 is calculated by subtracting.

  Next, in step S16, the heat exchanger temperature comparison determination unit 217 determines whether or not the set temperature difference Δt1 is equal to or greater than a threshold value 1 (for example, 2 ° C.). When the heat exchanger temperature comparison determination unit 217 determines that the set temperature difference Δt1 is not equal to or greater than the threshold value 1 (NO in step S16), the compressor control unit 219 is used to turn off the compressor 218 in step S18. Stop. Thereafter, the processing after step S15 is continued.

  On the other hand, when the heat exchanger temperature comparison determination unit 217 determines that the set temperature difference Δt1 is equal to or greater than the threshold value 1 (YES in step S16), the compressor 218 is switched using the compressor control unit 219 in step S17. The indoor heat exchanger 220 is cooled at the set temperature HT.

  Next, in step S19, the room temperature comparison unit 210 obtains the room temperature T2 from the room temperature detection unit 206, obtains the set temperature T1 from the room temperature set value holding unit 203, and sets the set temperature T1 from the room temperature T2. A set temperature difference Δt1 is calculated by subtracting.

  Next, in step S20, the heat exchanger temperature comparison determination unit 217 determines whether or not the set temperature difference Δt1 is equal to or less than a threshold value 2 (for example, 0 ° C.). If the heat exchanger temperature comparison / determination unit 217 determines that the set temperature difference Δt1 is not equal to or less than the threshold value 2 (NO in step S16), the process proceeds to step S19. Thereafter, the processing after step S19 is continued.

  On the other hand, when the heat exchanger temperature comparison / determination unit 217 determines that the set temperature difference Δt1 is equal to or smaller than the threshold value 2 (YES in step S20), the compressor 218 is switched using the compressor control unit 219 in step S21. Turn off and stop.

  Next, in step S22, the indoor / outdoor temperature comparison unit 214 acquires the set temperature T1 from the indoor temperature set value holding unit 203, acquires the outdoor temperature T3 from the outdoor temperature detection unit 213, and determines the outdoor temperature from the set temperature T1. An internal / external temperature difference Δt2 obtained by subtracting T3 is calculated.

  Next, in step S23, the operation mode determination unit 215 determines whether or not the internal / external temperature difference Δt2 is equal to or greater than a threshold value 3 (for example, 3 ° C.). If the operation mode determination unit 215 determines that the internal / external temperature difference Δt2 is not equal to or greater than the threshold 3 (NO in step S23), the operation mode determination unit 215 determines that the current operation mode is the cooling operation mode, and the process proceeds to step S15. Thereafter, the processing after step S15 is continued.

  On the other hand, when the operation mode determination unit 215 determines that the internal / external temperature difference Δt2 is greater than or equal to the threshold 3 (YES in step S23), the operation mode determination unit 215 determines that the current operation mode is the forced condensation dehumidification operation mode, and the process is performed in step S24. Then, the process proceeds to the forced condensation dehumidifying operation process shown in FIG.

  As shown in FIG. 6, in the forced condensation dehumidification operation process, first, in step S31, the operation mode determination unit 215 instructs the indoor unit fan / air outlet control unit 223 to enter the forced condensation dehumidification operation mode. The outlet control unit 223 controls the set position of the outlet 225 to the closed position to close the outlet 225.

  Next, in step S32, the indoor unit fan / air outlet control unit 223 turns off the indoor unit fan 224 to stop it, and stops air blowing from the air outlet 225 into the room.

  Next, in step S33, the heat exchanger temperature comparison / determination unit 217 selects the indoor heat exchanger 220 selected by the heat exchanger set temperature selection unit 212 from the heat exchanger temperature T4 detected by the heat exchanger temperature detection unit 216. A heat exchanger temperature difference Δt3 obtained by subtracting the dew point temperature TD is calculated.

  Next, in step S34, the heat exchanger temperature comparison determination unit 217 determines whether or not the heat exchanger temperature difference Δt3 is greater than a threshold value 4 (for example, 0 ° C.). When the heat exchanger temperature comparison determination unit 217 determines that the heat exchanger temperature difference Δt3 is not greater than the threshold value 4 (NO in step S34), the compressor control unit 219 is used to change the compressor 218 in step S36. Turn off and stop. Thereafter, the processing after step S33 is continued.

  On the other hand, when the heat exchanger temperature comparison determination unit 217 determines that the heat exchanger temperature difference Δt3 is larger than the threshold 4 (YES in step S34), the compressor 218 is used in step S35 by using the compressor control unit 219. To cool the indoor heat exchanger 220 at the dew point temperature TD.

  Next, in step S37, the absolute humidity calculation unit 207 detects the indoor temperature T2 detected by the indoor temperature detection unit 206 and the indoor relative humidity detection using the absolute humidity conversion table shown in FIG. The current indoor absolute humidity D2 is calculated from the indoor relative humidity U2 detected by the unit 205.

  Next, in step S38, the absolute humidity comparison unit 208 subtracts the target absolute humidity D1 calculated by the absolute humidity set value calculation unit 204 from the current indoor absolute humidity D2 calculated by the absolute humidity calculation unit 207. Calculate

Next, in step S39, the heat exchanger temperature comparison determination unit 217 determines whether or not the absolute humidity difference Δt4 is greater than a threshold value 5 (for example, 0 g / m ³ ). When the heat exchanger temperature comparison / determination unit 217 determines that the absolute humidity difference Δt4 is greater than the threshold 5 (YES in step S39), the process proceeds to step S33. Thereafter, the processing after step S33 is continued.

  On the other hand, when the heat exchanger temperature comparison determination unit 217 determines that the absolute humidity difference Δt4 is not greater than the threshold value 5 (NO in step S39), in step S40, the compressor 218 is switched using the compressor control unit 219. Turn off and stop.

  Next, in step S41, the indoor / outdoor temperature comparison unit 214 obtains the set temperature T1 from the indoor temperature set value holding unit 203, obtains the outdoor temperature T3 from the outdoor temperature detection unit 213, and obtains the outdoor temperature from the set temperature T1. An internal / external temperature difference Δt2 obtained by subtracting T3 is calculated.

  Next, in step S42, the operation mode determination unit 215 determines whether the internal / external temperature difference Δt2 is equal to or less than a threshold value 6 (for example, 0 ° C.). When the operation mode determination unit 215 determines that the internal / external temperature difference Δt2 is equal to or less than the threshold value 6 (YES in step S42), the operation mode determination unit 215 determines that the current operation mode is the cooling operation mode in step S44, and ends the forced condensation dehumidification operation. After that, the process returns to step S25 shown in FIG.

  On the other hand, when the operation mode determination unit 215 determines that the internal / external temperature difference Δt2 is not equal to or less than the threshold value 6 (NO in step S42), in step S43, the user performs forced condensation dehumidification operation using a remote controller (not shown) or the like. It is determined whether or not a stop operation has been performed. When the operation mode determination unit 215 determines that the user has stopped the forced condensation and dehumidification operation (YES in step S43), in step S44, the operation mode determination unit 215 determines that the current operation mode is the cooling operation mode, and the forced condensation and dehumidification operation. After ending, the process returns to step S25 shown in FIG. On the other hand, when operation mode determination unit 215 determines that the user has not performed the forced dew condensation dehumidifying operation stop operation (NO in step S43), the process proceeds to step S37. Thereafter, the processing after step S37 is continued.

  After the forced dew condensation dehumidifying operation process is completed, in step S25 shown in FIG. 5, the operation mode determination unit 215 determines whether or not the user has performed a cooling operation stop operation using a remote controller (not shown) or the like. to decide. If the operation mode determination unit 215 determines that the cooling operation has been stopped by the user (YES in step S25), the operation mode determination unit 215 ends the cooling operation in step S26 and ends the process. On the other hand, when the operation mode determination unit 215 determines that the cooling operation is not stopped by the user (NO in step S25), the process proceeds to step S13. Thereafter, the processing after step S13 is continued.

FIG. 7 is a diagram illustrating an example of an operation state of the air-conditioning apparatus illustrated in FIG. In the operation state of FIG. 7, the set temperature T1 is 28 ° C., the threshold 1 is 2 ° C., the threshold 2 is 0 ° C., the threshold 3 is 3 ° C., the threshold 4 is 0 ° C., the threshold 5 is 0 g / m ³ , and the threshold 6 is 0. An example in the case of ° C. is shown.

  As shown in FIG. 7, first, at bedtime t11, the set temperature T1 of the cooling operation is changed from 25 ° C. to 28 ° C., and the compressor 218 is turned off. Thereafter, the room temperature T2 and the heat exchanger temperature T4 rise, and the compressor 218 remains in the OFF state until the cooling operation start time t12 when the room temperature T2 becomes 30 ° C., which is 2 ° C. higher than the set temperature T1 (28 ° C.). is there. At this time, the indoor absolute humidity D2 also increases.

  Next, at the cooling operation start time t12, the compressor 218 is turned on. At this time, the indoor temperature T2 and the heat exchanger temperature T4 are decreased, and the indoor absolute humidity D2 is gradually increased.

  Next, when the room temperature T2 reaches the set temperature T1 (28 ° C.) at the cooling operation stop time t13, the compressor 218 is turned off. At this time, the indoor absolute humidity D2 further increases.

  Here, the outdoor temperature T3 decreases as time passes, and the forced dehumidification / dehumidification operation start time t14 when the outdoor temperature T3 becomes 25 ° C. which is 3 ° C. lower than the set temperature T1 (28 ° C.) is forced from the cooling operation. It can be switched to condensation dehumidification operation. That is, since the compressor 218 is turned on and the indoor heat exchanger 220 is cooled at the dew point temperature TD, the heat exchanger temperature T4 reaches the dew point temperature TD at the forced condensation dehumidifying operation maintenance start time t15. At this time, the indoor absolute humidity D2 decreases.

Next, the heat exchanger temperature T4 is maintained at the dew point temperature TD by repeatedly turning OFF / ON the compressor 218 by the forced dehumidification operation, and the indoor absolute humidity D2 is set to the target absolute humidity at the target absolute humidity arrival time t16. It decreases to D1 (11.8 g / m ³ ).

  Thereafter, the compressor 218 is repeatedly turned OFF / ON by the forced dew condensation dehumidifying operation, and the heat exchanger temperature T4 is maintained at the dew point temperature TD, so that the indoor absolute humidity D2 is the target absolute humidity D1 (11.8 g / m3). This state is maintained until the wake-up time t17.

  As described above, in the present embodiment, when the difference between the set temperature T1 and the outdoor temperature T3 is equal to or greater than the threshold value 3, the cooling operation is switched to the forced condensation dehumidification operation, the indoor unit fan 224 is stopped, and the air outlet By closing 225, both proper temperature and appropriate humidity are achieved. Thus, the user can continue to sleep comfortably without being awakened due to excessive cooling or high humidity.

  The forced condensation dehumidifying operation process is not particularly limited to the above example. For example, after the indoor absolute humidity D2 reaches the target absolute humidity D1, the heat exchanger temperature T4 is within a predetermined range including the dew point temperature TD, for example, a range from the dew point temperature TD to (dew point temperature TD + 0.5 to 3 ° C.). You may make it cool the indoor heat exchanger 220 so that it may become inside.

  FIG. 8 is a flowchart showing another example of the forced condensation dehumidifying operation process shown in FIG. In FIG. 8, the same processes as those in FIG. 6 are denoted by the same reference numerals, and detailed description thereof is omitted.

  First, in steps S31 to S33, processing similar to that in steps S31 to S33 shown in FIG. 6 is performed, and then in step S45, the heat exchanger temperature comparison determination unit 217 determines that the heat exchanger temperature difference Δt3 is a threshold value 4 ( For example, it is determined whether it is 0 ° C. or less. When the heat exchanger temperature comparison determination unit 217 determines that the heat exchanger temperature difference Δt3 is equal to or less than the threshold value 4 (YES in step S45), in step S36, the compressor control unit 219 is used to turn off the compressor 218. Stop. Thereafter, the processing after step S33 is continued.

  On the other hand, when the heat exchanger temperature difference determination unit 217 determines that the heat exchanger temperature difference Δt3 is not equal to or less than the threshold value 4 (NO in step S45), the heat exchanger temperature difference Δt3 is equal to the predetermined threshold value 7 (for example, 0 ° C. ) To determine whether it is greater. When the heat exchanger temperature comparison determination unit 217 determines that the heat exchanger temperature difference Δt3 is not greater than the threshold 7 (NO in step S46), the process proceeds to step S33. Thereafter, the processing after step S33 is continued.

  On the other hand, when the heat exchanger temperature comparison determination unit 217 determines that the heat exchanger temperature difference Δt3 is larger than the threshold 7 (YES in step S46), the compressor 218 is used in step S35 by using the compressor control unit 219. To cool the indoor heat exchanger 220 at the dew point temperature TD.

  As described above, by using the same value as the threshold value 4 as the threshold value 7, the same process as the forced condensation dehumidifying operation process shown in FIG. 6 is executed, and the temperature of the indoor heat exchanger 220, that is, the heat exchanger temperature T4 is After the temperature drops to the dew point temperature TD, the dew point temperature TD is maintained.

Next, in steps S37 to S39, processing similar to that in steps S37 to S39 shown in FIG. 6 is executed. In step S39, when the heat exchanger temperature comparison determination unit 217 determines that the absolute humidity difference Δt4 is greater than the threshold value 5 (for example, 0 g / m ³ ) (YES in step S39), the process proceeds to step S33. Thereafter, the processing after step S33 is continued.

  On the other hand, when the heat exchanger temperature comparison determination unit 217 determines in step S39 that the absolute humidity difference Δt4 is not greater than the threshold value 5 (for example, 0 g / m3) (NO in step S39), the threshold value 7 in step S47. Is changed to a threshold value 8 (for example, 0.5 ° C.) larger than the threshold value 7. Thereafter, in steps S40 to S44, processing similar to that in steps S40 to S44 shown in FIG. 6 is executed.

  Therefore, after the indoor absolute humidity D2 has decreased to the target absolute humidity D1, the heat exchanger temperature comparison determination unit 217 determines that the heat exchanger temperature difference Δt3 is not equal to or less than the threshold value 4 (NO in step S45), step S46. It is determined whether or not the heat exchanger temperature difference Δt3 is larger than the threshold value 8. If the heat exchanger temperature comparison determination unit 217 determines that the heat exchanger temperature difference Δt3 is not greater than the threshold value 8 (NO in step S46), the process proceeds to step S33. Thereafter, the subsequent processing is continued.

  On the other hand, when the heat exchanger temperature comparison determination unit 217 determines that the heat exchanger temperature difference Δt3 is greater than the threshold value 8 (YES in step S46), in step S35, the compressor 218 is used by using the compressor control unit 219. To cool the indoor heat exchanger 220 at the dew point temperature TD.

  As described above, the temperature 7 of the indoor heat exchanger 220, that is, the heat exchanger temperature T 4 is changed from the dew point temperature TD by changing the threshold 7 to the threshold 8 when the indoor absolute humidity D 2 decreases to the target absolute humidity D 1. It is maintained within the range up to the dew point temperature (TD + 0.5 ° C.).

FIG. 9 is a diagram illustrating an example of an operation state of the air conditioner when the forced dew condensation dehumidifying operation process illustrated in FIG. 8 is executed. In the operation state of FIG. 9, the set temperature T1 is 28 ° C., the threshold 1 is 2 ° C., the threshold 2 is 0 ° C., the threshold 3 is 3 ° C., the threshold 4 is 0 ° C., the threshold 5 is 0 g / m ³ , and the threshold 6 is 0. An example in which the temperature is 0 ° C., the threshold 7 is 0 ° C., and the threshold 8 is 0.5 ° C. is shown.

As shown in FIG. 9, the operation state of the air conditioner from the bedtime t11 during the cooling operation to the target absolute humidity arrival time t16 is the same as that in FIG. Next, at the target absolute humidity arrival time t16, when the indoor absolute humidity D2 decreases to the target absolute humidity D1 (11.8 g / m ³ ), the compressor 218 has the heat exchanger temperature T4 when the dew point temperature TD is reached. The operation that is turned on when the heat exchanger temperature T4 reaches (dew point temperature TD + 0.5 ° C.) is repeated. Therefore, the heat exchanger temperature T4 is maintained within a range from the dew point temperature TD to (dew point temperature TD + 0.5 ° C.). As a result, the room temperature T2 is maintained within an appropriate temperature range of about 29 ° C. until the wake-up time t17, and the indoor absolute humidity D2 is within an appropriate humidity range including the target absolute humidity D1 (11.8 g / m ³ ) (11 8 to 12.2 g / m ³ ).

  With the above-mentioned forced condensation dehumidification operation process, the indoor heat is set so that the indoor absolute humidity D2 falls within a predetermined range including the target absolute humidity D1 after the indoor absolute humidity D2 reaches the target absolute humidity D1 during the forced condensation dehumidification operation. The exchanger 220 is cooled. For this reason, it is possible to bring the room to a suitable temperature and humidity while preventing the room temperature from becoming too cold.

(Embodiment 2)
In the first embodiment, the cooling operation is switched to the forced condensation dehumidifying operation in accordance with the set temperature T1 or the difference between the indoor temperature T2 and the outdoor temperature T3. However, in the present embodiment, the cooling operation is switched to the forced condensation dehumidification operation according to the difference between the operation time and the stop time of the adjacent cooling operation in time series.

  FIG. 10 is a block diagram illustrating an exemplary configuration of the air-conditioning apparatus according to Embodiment 2 of the present disclosure. The air conditioning apparatus shown in FIG. 10 is different from the air conditioning apparatus shown in FIG. 2 in that a compressor ON time measurement unit 226, a compressor OFF time measurement unit 227, and an operation time comparison determination unit 228 are added. The same parts as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The compressor ON time measuring unit 226 acquires the operation state of the compressor 218 during the cooling operation from the compressor control unit 219, and as an example of the operation time of the cooling operation, the cooling time of the indoor heat exchanger 220, that is, during the cooling operation. The ON time indicating the time during which the compressor 218 is in the ON state is measured.

  The compressor OFF time measuring unit 227 acquires the operation state of the compressor 218 during the cooling operation from the compressor control unit 219, and as an example of the cooling operation stop time, the non-cooling time of the indoor heat exchanger 220, that is, the cooling operation. Sometimes an OFF time is measured which indicates the time during which the compressor 218 is in the OFF state.

  The operation time comparison / determination unit 228 compares the ON time acquired from the compressor ON time measurement unit 226 with the OFF time acquired from the compressor OFF time measurement unit 227, and determines the adjacent ON time and OFF time in the time series. Time difference d1 (= OFF time−ON time) is obtained.

  The operation mode determination unit 215 determines switching from the cooling operation to the forced condensation dehumidification operation according to the time difference d1 between the ON time and the OFF time acquired from the operation time comparison determination unit 228. Specifically, the operation mode determination unit 215 determines switching from the cooling operation to the forced condensation dehumidification operation when the time difference d1 between the ON time and the OFF time is equal to or greater than a predetermined threshold 9 (for example, 35 minutes). To do.

  The threshold value 9 is not particularly limited to the above example, and various values can be used. Further, the operation time and the stop time of the cooling operation are not particularly limited to the above example. For example, various changes such as using the count value of a counter that counts up every predetermined unit time can be used as the operation time and the stop time of the cooling operation.

  The heat exchanger temperature comparison / determination unit 217 and the indoor unit fan / air outlet control unit 223 cause the indoor unit fan 224 to blow air, open the air outlet 225, and indoor heat exchange so that the indoor temperature T2 becomes the set temperature T1. The cooling operation for cooling the cooler 220 is controlled. The heat exchanger temperature comparison / determination unit 217 and the indoor unit fan / air outlet control unit 223 stop the indoor unit fan 224, close the air outlet 225, cool the indoor heat exchanger 220 at the dew point temperature TD, and Controls forced condensation and dehumidification operation to perform dehumidification. Then, the heat exchanger temperature comparison determination unit 217 and the indoor unit fan / air outlet control unit 223 switch the cooling operation to the forced condensation dehumidification operation according to the switching determination result of the operation mode determination unit 215.

  In addition, the operation | movement of forced dew condensation dehumidification driving | operation is not specifically limited to said example. For example, the indoor unit fan 224 may be blown or the outlet 225 may be opened during the forced dew condensation dehumidifying operation. Further, a known dehumidifying operation may be used instead of the forced condensation dehumidifying operation, for example, the reheat dry operation disclosed in Patent Document 2 may be used.

  In the present embodiment, the absolute humidity set value calculation unit 204 is an example of a first acquisition unit or a first calculation unit, and the dew point temperature calculation unit 209 is an example of a second acquisition unit or a second calculation unit, The absolute humidity calculation unit 207 is an example of a third acquisition unit or a third calculation unit, and the heat exchanger temperature comparison determination unit 217 and the indoor unit fan / air outlet control unit 223 are examples of a control unit. The outdoor temperature detection unit 213 is an example of a fourth acquisition unit.

  The room temperature set value holding unit 203 is an example of another first acquisition unit, the room temperature detection unit 206 is an example of another second acquisition unit, and the operation mode determination unit 215 is another determination. The heat exchanger temperature comparison / determination unit 217 and the indoor unit fan / air outlet control unit 223 are an example of another control unit. The indoor relative humidity set value holding unit 202 is an example of another third acquisition unit, the indoor relative humidity detection unit 205 is an example of another fourth acquisition unit, and the absolute humidity set value calculation unit 204 is The dew point temperature calculation unit 209 is an example of another second calculation unit, and the absolute humidity calculation unit 207 is an example of another third calculation unit.

  Here, the indoor relative humidity set value holding unit 202, the room temperature set value holding unit 203, the absolute humidity set value calculating unit 204, the absolute humidity calculating unit 207, the dew point temperature calculating unit 209, the operation mode determining unit 215, the heat exchanger temperature. The comparison determination unit 217, the indoor unit fan / air outlet control unit 223, and the like are configured from, for example, a processor, a memory, and the like. In the present embodiment, absolute humidity set value calculation unit 204, absolute humidity calculation unit 207, dew point temperature calculation unit 209, operation mode determination unit 215, heat exchanger temperature comparison determination unit 217, and indoor unit fan / air outlet Although the control unit 223 and the like are built in the indoor unit 200, the present invention is not particularly limited to this example. For example, various modifications such as incorporating some or all of them in the outdoor unit 201 or incorporating them in an external server or the like are possible.

  FIG. 11 is a flowchart illustrating an example of a humidity control process of the air-conditioning apparatus illustrated in FIG. In the present embodiment, the air conditioning apparatus is switched from the cooling operation to the forced condensation dehumidifying operation by the humidity control process shown in FIG.

  As shown in FIG. 11, first, in steps S <b> 11 to S <b> 18, processing similar to steps S <b> 11 to S <b> 18 shown in FIG. 5 is performed, and then in step S <b> 51, the compressor ON time measuring unit 226 The operation state of the compressor 218 during the cooling operation is acquired from 219, and the ON time of the compressor 218 during the cooling operation is measured.

  Next, in steps S19 to S21, processing similar to that in steps S19 to S21 shown in FIG. 5 is executed, and then in step S52, the compressor OFF time measuring unit 227 receives the cooling control operation from the compressor control unit 219. The operating state of the compressor 218 is acquired, and the OFF time of the compressor 218 during the cooling operation is measured.

  Next, in step S53, the operation time comparison determination unit 228 calculates a time difference d1 obtained by subtracting the ON time measured by the compressor ON time measurement unit 226 from the OFF time measured by the compressor OFF time measurement unit 227. .

  Next, in step S54, the operation mode determination unit 215 determines whether or not the time difference d1 is greater than or equal to a threshold value 9 (for example, 35 minutes). When it is determined in step S54 that the time difference d1 is not equal to or greater than the threshold value 9 (NO in step S54), in step S55, the room temperature comparison unit 210 acquires the room temperature T2 from the room temperature detection unit 206 and the room temperature. The set temperature T1 is acquired from the set value holding unit 203, and the set temperature difference Δt1 obtained by subtracting the set temperature T1 from the room temperature T2 is calculated.

  Next, in step S56, the heat exchanger temperature comparison determination unit 217 determines whether or not the set temperature difference Δt1 is equal to or greater than a threshold value 1 (for example, 2 ° C.). When the heat exchanger temperature comparison / determination unit 217 determines that the set temperature difference Δt1 is not equal to or greater than the threshold value 1 (NO in step S56), the process proceeds to step S21 and maintains the state where the compressor 218 is turned off. Next, in step S52, the compressor OFF time measuring unit 227 measures the OFF time of the compressor 218 during the cooling operation. Thereafter, the processing after step S53 is continued.

  On the other hand, when the heat exchanger temperature comparison / determination unit 217 determines that the set temperature difference Δt1 is equal to or greater than the threshold value 1 (YES in step S56), in step S17, the compressor 218 is switched using the compressor control unit 219. The indoor heat exchanger 220 is cooled at the set temperature HT. Next, in step S51, the compressor ON time measuring unit 226 measures the ON time of the compressor 218 during the cooling operation. Thereafter, the processing after step S19 is continued.

  On the other hand, when it is determined in step S54 that the time difference d1 is greater than or equal to the threshold value 9 (YES in step S54), the forced condensation dehumidifying operation process shown in FIG. 8 is executed in step S24 as in the first embodiment. The Thereafter, in steps S25 and S26, processing similar to that in steps S25 and S26 shown in FIG. 5 is executed, and the processing ends. The forced condensation dehumidifying operation process executed in step S24 is not particularly limited to the above example. For example, various changes such as executing the forced dew condensation dehumidifying operation process shown in FIG. 6 in step S24 are possible.

12 is a diagram illustrating an example of an operation state of the air-conditioning apparatus illustrated in FIG. In the operation state of FIG. 12, the forced condensation dehumidifying operation process shown in FIG. 8 is executed, the set temperature T1 is 28 ° C., the threshold value 1 is 2 ° C., the threshold value 2 is 0 ° C., the threshold value 4 is 0 ° C. In this example, m ³ , threshold 6 is 0 ° C., threshold 7 is 0 ° C., threshold 8 is 0.5 ° C., and threshold 9 is 35 minutes.

  As shown in FIG. 12, first, at bedtime t21, the set temperature T1 of the cooling operation is changed from 25 ° C. to 28 ° C., and the compressor 218 is turned off. At this time, the room temperature T2 and the heat exchanger temperature T4 rise, and the compressor 218 is in the OFF state until the cooling operation start time t22 when the room temperature T2 becomes 30 ° C., which is 2 ° C. higher than the set temperature T1 (28 ° C.). It is in. At this time, the indoor absolute humidity D2 also increases.

  Next, when the room temperature T2 reaches 30 ° C., which is 2 ° C. higher than the set temperature T1 (28 ° C.), the compressor 218 is turned on at the cooling operation start time t22, and the ON time O1 of the compressor 218 is measured. At this time, the indoor temperature T2 and the heat exchanger temperature T4 decrease, and the indoor absolute humidity D2 gradually increases.

  Next, when the room temperature T2 reaches the set temperature T1 (28 ° C.), the compressor 218 is turned off at the cooling operation stop time t23, and the OFF time S1 of the compressor 218 is measured. At this time, the indoor temperature T2 and the heat exchanger temperature T4 rise, and the indoor absolute humidity D2 further rises.

  Here, when the ON time O1 is 13 minutes and the OFF time S1 is 42 minutes, the time difference d1 (= S1-O1) between the ON time and the OFF time is 29 minutes, and when the threshold value is 9 (35 minutes) or more, Therefore, the cooling operation cannot be switched from the cooling operation to the forced condensation dehumidification operation, and the cooling operation is maintained.

  Next, when the room temperature T2 reaches 30 ° C., which is 2 ° C. higher than the set temperature T1 (28 ° C.), the compressor 218 is turned on at the cooling operation start time t24, and the ON time O2 of the compressor 218 is measured. At this time, the indoor temperature T2 and the heat exchanger temperature T4 decrease, and the indoor absolute humidity D2 gradually increases.

  Next, when the room temperature T2 reaches the set temperature T1 (28 ° C.), the compressor 218 is turned off at the cooling operation stop time t25, and the OFF time S2 of the compressor 218 is measured. At this time, the indoor temperature T2 and the heat exchanger temperature T4 rise, and the indoor absolute humidity D2 further rises.

  Here, when the ON time O2 is 12 minutes and the OFF time S2 is 45 minutes, the time difference d1 (= S2-O2) between the ON time and the OFF time is 33 minutes, and the threshold value 9 (35 minutes) or more is exceeded. Therefore, the cooling operation cannot be switched from the cooling operation to the forced condensation dehumidification operation, and the cooling operation is maintained.

  Next, when the room temperature T2 reaches 30 ° C. which is 2 ° C. higher than the set temperature T1 (28 ° C.), the compressor 218 is turned on at the cooling operation start time t26, and the ON time O3 of the compressor 218 is measured. At this time, the indoor temperature T2 and the heat exchanger temperature T4 decrease, and the indoor absolute humidity D2 gradually increases.

  Next, when the indoor temperature T2 reaches the set temperature T1 (28 ° C.), the compressor 218 is turned off at the cooling operation stop time t27, and the OFF time S3 of the compressor 218 is measured. At this time, the indoor temperature T2 and the heat exchanger temperature T4 rise, and the indoor absolute humidity D2 further rises.

  Here, when the outdoor temperature T3 decreases with time, the ON time O3 is 11 minutes, and the OFF time S3 is 48 minutes, the time difference d1 (= S3-O3) between the ON time and the OFF time. Becomes 37 minutes, and becomes the threshold value 9 (35 minutes) or more. Therefore, at the start time t28 of the forced condensation / dehumidification operation, the cooling operation is switched to the forced condensation / dehumidification operation. That is, since the compressor 218 is turned on and the indoor heat exchanger 220 is cooled at the dew point temperature TD, the heat exchanger temperature T4 reaches the dew point temperature TD at the forced condensation and dehumidification operation operation start time t29. At this time, the indoor absolute humidity D2 also decreases.

Next, the heat exchanger temperature T4 is maintained at the dew point temperature TD by repeating the OFF / ON of the compressor 218 by the forced condensation dehumidifying operation, and the indoor absolute humidity D2 is set to the target absolute humidity at the target absolute humidity arrival time t30. It decreases to D1 (11.8 g / m ³ ).

Next, at the target absolute humidity arrival time t30, when the indoor absolute humidity D2 decreases to the target absolute humidity D1 (11.8 g / m ³ ), the compressor 218 has the heat exchanger temperature T4 at the dew point temperature TD. The operation that is turned on when the heat exchanger temperature T4 reaches (dew point temperature TD + 0.5 ° C.) is repeated. Therefore, the heat exchanger temperature T4 is maintained within a range from the dew point temperature TD to (dew point temperature TD + 0.5 ° C.). As a result, until the wake-up time t31, the room temperature T2 is maintained within an appropriate temperature range of about 29 ° C., and the indoor absolute humidity D2 is within an appropriate humidity range including the target absolute humidity D1 (11.8 g / m ³ ) (11 8 to 12.2 g / m ³ ).

  As described above, in the present embodiment, when the time difference d1 between the ON time and the OFF time that are adjacent in the time series is equal to or greater than the threshold value 9, the cooling operation is switched to the forced condensation dehumidification operation, and the indoor unit fan 224 is switched on. By stopping and closing the outlet 225, both the appropriate temperature and the appropriate humidity are achieved. Thus, the user can continue to sleep comfortably without being awakened due to excessive cooling or high humidity.

  In addition, by the above-mentioned forced condensation dehumidification operation process, after the indoor absolute humidity D2 reaches the target absolute humidity D1 during the forced condensation dehumidification operation, the indoor absolute humidity D2 is within a predetermined range including the target absolute humidity D1. The indoor heat exchanger 220 is cooled. For this reason, it is possible to bring the room to a suitable temperature and humidity while preventing the room temperature from becoming too cold.

  According to the air conditioning apparatus and the air conditioning control method according to one aspect of the present disclosure, even in a summer night air conditioning control, even if a cold person sets a higher temperature for cooling operation, Comfortable sleep can be continued without awakening. For this reason, the air conditioning apparatus and the air conditioning control method according to one aspect of the present disclosure can be used in a bedroom where a person is sleeping, even if the cooling operation is a high temperature setting in summer night air conditioning control. It is useful as an air conditioner and an air conditioning control method that maintain humidity.

DESCRIPTION OF SYMBOLS 200 Indoor unit 201 Outdoor unit 202 Indoor relative humidity set value holding | maintenance part 203 Indoor temperature set value holding part 204 Absolute humidity set value calculation part 205 Indoor relative humidity detection part 206 Indoor temperature detection part 207 Absolute humidity calculation part 208 Absolute humidity comparison part 209 Dew point temperature calculation unit 210 Indoor temperature comparison unit 211 Heat exchanger temperature set value calculation unit 212 Heat exchanger set temperature selection unit 213 Outdoor temperature detection unit 214 Indoor / outdoor temperature comparison unit 215 Operation mode determination unit 216 Heat exchanger temperature detection unit 217 Heat exchanger temperature comparison / determination unit 218 Compressor 219 Compressor control unit 220 Indoor heat exchanger 221 Indoor unit fan / outlet operation setting holding unit 222 Indoor unit fan / outlet operation determination unit 223 Indoor unit fan / outlet control unit 224 Indoor unit fan 225 Air outlet 226 Compressor ON time measurement unit 227 Compressor OFF time measurement unit 228 Operating time comparison / determination unit

Claims (7)

A first acquisition unit for acquiring a first absolute humidity indicating a target absolute humidity determined from a first temperature indicating a preset temperature and a first relative humidity indicating a preset relative humidity;
A second acquisition unit for acquiring a dew point temperature determined from the first temperature and the first relative humidity;
A third acquisition unit for acquiring a second absolute humidity indicating the absolute humidity of the room, which is determined from a second temperature indicating the temperature of the room and a second relative humidity indicating the relative humidity of the room;
A heat exchanger for exchanging heat between the indoor air and the refrigerant;
An air blower for blowing air cooled by the heat exchanger;
An air outlet for blowing air blown by the blower into the room;
When the second absolute humidity exceeds the first absolute humidity, the dehumidifying operation of stopping the air blowing of the air blowing unit, closing the air blowing port, and cooling the heat exchanger at the dew point temperature is controlled. A control unit,
An air conditioner comprising: The first acquisition unit includes:
A first calculating unit that obtains the first temperature and the first relative humidity and calculates the first absolute humidity from the first temperature and the first relative humidity;
The second acquisition unit includes
A second calculating unit that obtains the first temperature and the first relative humidity and calculates the dew point temperature from the first temperature and the first relative humidity;
The third acquisition unit includes
A third calculating unit that obtains the second temperature and the second relative humidity and calculates the second absolute humidity from the second temperature and the second relative humidity;
The air conditioning apparatus according to claim 1. The control unit continues cooling the heat exchanger while the second absolute humidity exceeds the first absolute humidity.
The air conditioning apparatus according to claim 1. The control unit continues cooling the heat exchanger while the temperature of the heat exchanger does not fall below the dew point temperature.
The air conditioning apparatus according to claim 1. A fourth acquisition unit that acquires a third temperature indicating an outdoor temperature;
The control unit starts the dehumidifying operation when the first temperature or the second temperature exceeds the third temperature.
The air conditioning apparatus according to claim 1. In the dehumidifying operation, the control unit controls the heat exchanger so that the temperature of the heat exchanger is within a predetermined range including the dew point temperature after the second absolute humidity reaches the first absolute humidity. Cooling,
The air conditioning apparatus according to claim 1. Using a processor, a heat exchanger that exchanges heat between indoor air and refrigerant, a blower that blows air cooled by the heat exchanger, and blows air blown by the blower into the room A method for controlling an air conditioner comprising a ventilation port for
Obtaining a first absolute humidity indicating a target absolute humidity determined from a first temperature indicating a preset temperature and a first relative humidity indicating a preset relative humidity;
Obtaining a dew point temperature determined from the first temperature and the first relative humidity;
Obtaining a second absolute humidity indicative of the absolute humidity in the room determined from a second temperature indicative of the temperature in the room and a second relative humidity indicative of the relative humidity in the room;
When the second absolute humidity exceeds the first absolute humidity, the dehumidifying operation of stopping the air blowing of the air blowing unit, closing the air blowing port, and cooling the heat exchanger at the dew point temperature is controlled. To
Air conditioning control method.