Control method for air conditioning system and air conditioning system

Abstract

To provide an air conditioning system that can adjust temperature and humidity while reducing power consumption. [Solution] The control method for the air conditioning system 10 includes: a first process of operating the air conditioning system 10 so that the temperature of the room in which the air conditioning system is installed becomes a preset target temperature; a second process of setting a dehumidification temperature that is a specific value lower than the target temperature if the humidity of the room obtained after the first process is equal to or higher than a preset target humidity; a third process of operating the air conditioning system 10 so that the temperature of the room becomes the dehumidification temperature; a fourth process of setting the dehumidification temperature to the target temperature if the humidity of the room obtained after the third process is equal to or lower than the target humidity; and a fifth process of operating the air conditioning system 10 so that the temperature of the room becomes the target temperature after the fourth process.

Description

Technical Field

[0001] The present invention relates to a control method for an air conditioner and an air conditioner.

Background Art

[0002] In a household air conditioner, a dehumidifying operation for reducing indoor humidity and a cooling operation for reducing indoor temperature are independent operation modes with separate push buttons. Since such a household air conditioner cannot adjust humidity and temperature simultaneously, as a result of performing the dehumidifying operation, the room may become too cold, or as a result of performing the cooling operation in a high humidity state, one may feel uncomfortable.

[0003] On the other hand, in a building air conditioner, there is one in which the dehumidifying operation and the cooling operation are independent operation modes with separate push buttons, similar to a household air conditioner, and there is also a high - performance air conditioner that can raise (re - heat) the air that has been once dehumidified to a desired temperature and blow it out during the cooling operation (for example, Patent Document 1). Specifically, a high - performance building air conditioner dehumidifies by excessively cooling indoor air in the heat exchanger of the air conditioner. Then, the air conditioner warms the dehumidified air and blows it into the room at an appropriate temperature. Therefore, a high - performance building air conditioner consumes more power by the amount of warming the air after cooling it.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide an air conditioner capable of adjusting temperature and humidity while suppressing power consumption.

Means for Solving the Problems

[0006] To solve the above problems, a control method for an air conditioning system is provided, which includes: a first process of operating the air conditioning system so that the temperature of the room in which the air conditioning system is installed becomes a preset target temperature; a second process of setting a dehumidification temperature that is a specific value lower than the target temperature if the humidity of the room obtained after the first process is equal to or higher than a preset target humidity; a third process of operating the air conditioning system so that the temperature of the room becomes the dehumidification temperature; a fourth process of setting the dehumidification temperature to the target temperature if the humidity of the room obtained after the third process is equal to or lower than the target humidity; and a fifth process of operating the air conditioning system so that the temperature of the room becomes the target temperature after the fourth process. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an air conditioning system that can adjust temperature and humidity while suppressing power consumption. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram of the air conditioning unit 10 located in room 1. [Figure 2] This is an overview of the indoor unit 11. [Figure 3] This is a block diagram of the control unit 100. [Figure 4] This is a flowchart showing the processing performed by the control unit 100. [Figure 5] This flowchart shows the processing performed by the control unit 100 in the modified example. [Figure 6] This is a flowchart showing the processing performed by the control unit 100 in the second embodiment. [Figure 7] This is a flowchart showing the processing performed by the control unit 100 in the third embodiment. [Figure 8] This is a flowchart showing the processing performed by the control unit 100 in the fourth embodiment. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below are subject to various technically preferred limitations for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

[0010] ==First Embodiment== <Air conditioner> Figure 1 shows an example of an air conditioning system 10 installed in a room 1 of a building such as an office building or residence. The air conditioning system 10 comprises an indoor unit 11, piping 12, an outdoor unit 13, a thermometer 14, a hygrometer 15, and an input device 16.

[0011] [Indoor unit] The indoor unit 11 provides air conditioning for room 1. As shown in Figure 2, the indoor unit 11 includes a casing 20, a heat exchanger 30, a blower 40, and a control unit 100.

[0012] The casing 20 is the housing of the indoor unit 11. The casing 20 has an internal space. The casing 20 has an air intake port 21 and an air outlet port 22.

[0013] The air intake port 21 is a hole provided in the casing 20. The air intake port 21 connects the room 1 to the space inside the casing 20.

[0014] The air outlet 22 is a hole provided in the casing 20. The air outlet 22 connects the space inside the casing 20 to the room 1.

[0015] The space inside the casing 20 houses the heat exchanger 30, the blower 40, and the control unit 100.

[0016] The heat exchanger 30 exchanges heat with the air inside the casing 20. Refrigerant is supplied to the inside of the heat exchanger 30. The heat exchanger 30 performs heat exchange between the supplied refrigerant and the air inside the casing 20. When the temperature of the refrigerant supplied to the heat exchanger 30 is lower than the temperature of the air inside the casing 20, the refrigerant cools the air inside the casing 20. At this time, due to the decrease in the temperature of the air, the moisture contained in the air gathers on the surface of the heat exchanger 30 and condenses. The condensed water is received by a drip pan (not shown) and flows out of the casing 20 through a hose (not shown) connected to the drip pan. On the other hand, when the temperature of the refrigerant supplied to the heat exchanger 30 is higher than the temperature of the air inside the casing 20, the refrigerant warms the air inside the casing 20.

[0017] The blower 40 is a device that blows air. Specifically, the blower 40 blows the air inside the casing 20 toward the air outlet 22. By blowing air, the blower 40 supplies the air inside the casing 20 from the air outlet 22 to the room 1. Since the air inside the casing 20 is discharged when the blower 40 blows air, a negative pressure is created inside the casing 20. Therefore, the air in the room 1 is sucked into the inside of the casing 20 through the air inlet 21. The sucked air undergoes heat exchange by the heat exchanger 30 inside the casing 20. Then, it is supplied to the room 1 by the blowing of the blower 40.

[0018] The control unit 100 controls the operations of the outdoor unit 13, the heat exchanger 30, and the blower 40. Details of the control unit 100 will be described later.

[0019] [Piping] The pipe 12 is a pipe that connects the outdoor unit 13 and the heat exchanger 30. The pipe 12 is composed of two pipes 12a and 12b, both of which connect the outdoor unit 13 and the heat exchanger 30. Refrigerant flows through the pipes 12a and 12b.

[0020] [Outdoor Unit] The outdoor unit 13 has an expansion machine 13a, an outdoor heat exchanger 13b, and a compressor 13c.

[0021] The pressure reducer 13a reduces the pressure of the refrigerant. The pressure reducer 13a is connected to the heat exchanger 30 through piping 12a and to the outdoor heat exchanger 13b through piping inside the outdoor unit 13.

[0022] The outdoor heat exchanger 13b performs heat exchange between the refrigerant and the outdoor air. The outdoor heat exchanger 13b is connected to the pressure reducer 13a and the compressor 13c by separate piping inside the outdoor unit 13.

[0023] The compressor 13c compresses the refrigerant. The compressor 13c is connected to the heat exchanger 30 through piping 12b and to the outdoor heat exchanger 13b through piping inside the outdoor unit 13.

[0024] Here, we will describe the refrigerant flowing through the piping 12a, 12b, the pressure reducer 13a, the outdoor heat exchanger 13b, the compressor 13c, and the heat exchanger 30. When the air conditioning unit 10 is in cooling operation, the refrigerant is compressed in the compressor 13c and becomes a high-temperature gas. Next, the refrigerant flows to the outdoor heat exchanger 13b. In the outdoor heat exchanger 13b, the refrigerant exchanges heat with the outdoor air and is cooled. As a result, the refrigerant becomes a liquid. Next, the refrigerant flows to the pressure reducer 13a. In the pressure reducer 13a, the refrigerant is depressurized and becomes a low-temperature liquid. Next, the refrigerant flows through the piping 12a to the heat exchanger 30. In the heat exchanger 30, the refrigerant exchanges heat with the air inside the casing 20, taking heat from the air inside the casing 20 and becoming a gas. Next, the refrigerant flows through the piping 12b to the compressor 13c.

[0025] As described above, the air inside the casing 20 is cooled as heat is absorbed by the refrigerant. Therefore, the cooled air is blown out by the blower 40, and the air conditioning unit 10 operates in cooling mode.

[0026] On the other hand, when the air conditioning unit 10 is operating in heating mode, the refrigerant is depressurized in the pressure reducer 13a and becomes a low-temperature liquid. Next, the refrigerant flows to the outdoor heat exchanger 13b. In the outdoor heat exchanger 13b, the refrigerant exchanges heat with the outdoor air and is heated. As a result, the refrigerant becomes a gas. Next, the refrigerant flows to the compressor 13c. In the compressor 13c, the refrigerant is compressed and becomes a high-temperature gas. Next, the refrigerant flows through the piping 12b to the heat exchanger 30. In the heat exchanger 30, the refrigerant exchanges heat with the air inside the casing 20, transferring heat to the air inside the casing 20 and becoming a liquid. Next, the refrigerant flows through the piping 12a to the pressure reducer 13a.

[0027] As described above, the air inside the casing 20 is heated as a result of heat being supplied by the refrigerant. Therefore, since the heated air is blown by the blower 40, the air conditioning unit 10 operates in heating mode.

[0028] [Thermometer, hygrometer] The thermometer 14 measures the temperature. The thermometer 14 is installed inside room 1 together with the indoor unit 11 and measures the temperature inside room 1. The thermometer 14 is connected to the control unit 100 in a communicative manner. The thermometer 14 transmits the measured temperature value of room 1, i.e., temperature data, to the control unit 100. The thermometer 14 may be included in the air conditioning unit 10, or it may be a separate unit from the air conditioning unit 10.

[0029] The hygrometer 15 measures humidity. The hygrometer 15 is installed in room 1 together with the indoor unit 11 and measures the humidity inside room 1. The hygrometer 15 is connected to the control unit 100 for communication. The hygrometer 15 transmits the measured humidity value of room 1, i.e., humidity data, to the control unit 100. The hygrometer 15 may be included in the air conditioning unit 10, or it may be a separate unit from the air conditioning unit 10.

[0030] [Input device] The input device 16 inputs instructions from the user of the air conditioning unit 10 to the air conditioning unit 10. The input device 16 receives operations from the user of the air conditioning unit 10, such as switching between starting and stopping the air conditioning unit 10, switching between operating modes such as cooling, heating, and dehumidification, and changing the target temperature and target humidity as described later. The input device 16 then transmits the received operation details as data to the control unit 100. The input device 16 is electrically connected to the control unit 100 either by wire or wireless connection and transmits the received operation details data to the control unit. The input device 16 is, for example, a remote control, a smartphone, or a tablet terminal.

[0031] <Department Head> As shown in Figure 3, the control unit 100 includes a processor 101, a main memory 102, an auxiliary memory 103, and a communication device 104.

[0032] The processor 101 is composed of a CPU (Central Processing Unit), an MPU (Micro Processing Unit), and the like. The functions of the air conditioning unit 10 are realized when the processor 101 reads and executes a program stored in the main memory 102. The processor 101 also allocates storage space in the auxiliary memory 103 according to the program.

[0033] The main memory 102 is a device for storing programs and data, and can be ROM (Read Only Memory), RAM (Random Access Memory), non-volatile semiconductor memory (NVRAM (Non-Volatile RAM)), etc.

[0034] The auxiliary storage device 103 is a device on which programs and data are stored, and is such as RAM (Random Access Memory).

[0035] The communication device 104 is a wired or wireless communication interface that enables communication with other devices and sensors. The communication device 104 receives temperature data from the thermometer 14, humidity data from the hygrometer 15, and operation data from the input device 16.

[0036] The processor 101 functions as the respective processing units of the acquisition unit 1001, measurement unit 1002, and adjustment unit 1003 by executing a program.

[0037] [Explanation of the processing method] The acquisition unit 1001 acquires various types of information. The acquisition unit 1001 acquires temperature data, humidity data, and operation content data received by the communication device 104, respectively.

[0038] Here, we will explain the target temperature and target humidity included in the operation data. The target temperature is the target temperature value inside Room 1 that the user wishes to set. The air conditioning unit 10 operates so that the temperature inside Room 1 reaches the target temperature. The target temperature is numerical data, for example, 28.0 (°C).

[0039] Furthermore, the target humidity is the target humidity value in Room 1 that the user wishes to set. The air conditioning unit 10 operates so that the humidity in Room 1 reaches the target humidity. The target humidity is a numerical value, for example, 65%.

[0040] The measurement unit 1002 performs various measurements. The measurement unit 1002 compares the temperature data received by the communication device 104 with the target temperature and measures the amount of time that the indoor temperature of room 1 is below or below the target temperature. The measurement unit 1002 also compares the humidity data received by the communication device 104 with the target humidity and measures the amount of time that the indoor humidity of room 1 is above or above the target humidity.

[0041] The adjustment unit 1003 performs the necessary processing for adjusting the temperature inside room 1. The adjustment unit 1003 processes data acquired by the acquisition unit 1001, data measured by the measurement unit 1002, and data pre-entered in the main memory 102. For example, the adjustment unit 1003 compares the data measured by the measurement unit 1002 with the first or second time entered in the main memory 102. The adjustment unit 1003 also calculates the dehumidification temperature from the target temperature acquired by the acquisition unit 1001.

[0042] The first time interval is the time required for the air conditioning unit 10 to switch to the target temperature, based on how long the humidity in room 1 remains above or above the target humidity. The first time interval is time data pre-stored in the main memory 102. The first time interval is numerical data, for example, 1800 (seconds).

[0043] The second time is the time required to switch the air conditioning unit 10 to the target temperature after the temperature of room 1 has remained below or below the target temperature for a certain period of time. The second time is time data pre-stored in the main memory 102. The second time is numerical data, for example, 1800 (seconds).

[0044] The dehumidification temperature is a temperature that is a specific value lower than the target temperature. The dehumidification temperature is a temperature that is lower than the target temperature and is at or above the temperature that can be set in the air conditioning unit 10. Therefore, the minimum value of the dehumidification temperature is the lowest temperature that can be set in the air conditioning unit 10 (for example, 18°C). The specific value is a numerical value such as 0.5°C or 1.0°C.

[0045] <Processing flow> Next, the flow of processing performed by the control unit 100 and the operation of the air conditioning unit 10 will be explained using the flowchart in Figure 4. In the series of processes described below, the air conditioning unit 10 performs cooling operation. The user operates the input device 16 and selects cooling operation. Then, the user operates the input device 16 and inputs the desired temperature and humidity. Following the user's operation, the input device 16 transmits instruction data to the control unit 100 to start cooling operation. The control unit 100 starts the air conditioning unit 10. Then, the acquisition unit 1001, the measurement unit 1002, and the adjustment unit 1003 perform the processing described in each of the following steps S101 to S123.

[0046] (S101) The acquisition unit 1001 acquires target temperature and target humidity data from the input device 16 via the communication device 104. In this embodiment, the acquisition unit 1001 acquires 25.0°C as the target temperature and 60% as the target humidity.

[0047] (S102) The adjustment unit 1003 sets the target temperature (25.0°C) acquired by the acquisition unit 1001 to the air conditioning unit 10.

[0048] (S103) The adjustment unit 1003 controls the outdoor unit 13, heat exchanger 30, and blower 40 to operate the air conditioning system 10 so that the temperature of room 1 reaches the target temperature.

[0049] (S104) After S101, the acquisition unit 1001 acquires the temperature of room 1 from the thermometer 14 and the humidity of room 1 from the hygrometer 15 via the communication device 104.

[0050] (S105) The adjustment unit 1003 compares the humidity of room 1 acquired by the acquisition unit 1001 in S104 with the target humidity acquired in S101. If the humidity of room 1 is higher than the target humidity (S105: YES), the adjustment unit 1003 then performs the process in S106. On the other hand, if the humidity of room 1 is less than or equal to the target humidity (S105: NO), the adjustment unit 1003 then performs the process in S115. Note that in S105, if the humidity of room 1 is greater than or equal to the target humidity, the adjustment unit 1003 may then perform the process in S106. If the humidity of room 1 is lower than the target humidity, the adjustment unit 1003 then performs the process in S115.

[0051] For example, if the acquisition unit 1001 acquires that the humidity of room 1 is 80%, the adjustment unit 1003 compares the humidity of room 1 (80%) with the target humidity of 60%. In this case, since the humidity of room 1 is higher than the target humidity, the adjustment unit 1003 then performs the process in S106.

[0052] (S106) The adjustment unit 1003 determines whether the measurement unit 1002 is measuring the time during which the humidity inside room 1 is equal to or higher than the target humidity. If the measurement unit 1002 is not measuring time (S106: NO), the adjustment unit 1003 then proceeds to process S107. On the other hand, if the measurement unit 1002 is measuring time (S106: YES), the adjustment unit 1003 then proceeds to process S108.

[0053] (S107) The measurement unit 1002 starts measuring the time during which the humidity in room 1 is equal to or higher than the target humidity. In this embodiment, the measurement unit 1002 measures the time during which the humidity in room 1 is higher than the target humidity. Subsequently, the adjustment unit 1003 performs the process in S104.

[0054] (S108) The adjustment unit 1003 compares the time during which the humidity of room 1, as measured by the measurement unit 1002, is higher than the target humidity with the first time. First, the adjustment unit 1003 obtains the first time (in this embodiment, 1200 seconds) from the main memory 102. Next, the adjustment unit 1003 obtains the time being measured by the measurement unit 1002. Then, the adjustment unit 1003 compares the time being measured by the measurement unit 1002 with the first time. If the time being measured by the measurement unit 1002 is equal to or greater than the first time (S108: YES), the adjustment unit 1003 then performs the process in S109. On the other hand, if the time being measured by the measurement unit 1002 is shorter than the first time (S108: NO), the adjustment unit 1003 then performs the process in S104. In addition, if the time measured by the measuring unit 1002 in S108 is longer than the first hour, the adjustment unit 1003 may proceed to perform the process in S109. If the time measured by the measuring unit 1002 is less than or equal to the first hour, the adjustment unit 1003 proceeds to perform the process in S104.

[0055] (S109) The measuring unit 1002 stops measuring the time during which the humidity in room 1 is higher than the target humidity. Then, the measuring unit 1002 resets the measured time.

[0056] (S110) The adjustment unit 1003 calculates the dehumidification temperature and sets it to the air conditioning unit 10. First, the adjustment unit 1003 obtains a specific value (in this embodiment, 1.0°C) from the main memory 102 to calculate the dehumidification temperature. Next, the adjustment unit 1003 calculates the dehumidification temperature by subtracting the specific value from the target temperature. In this embodiment, the target temperature is 25.0°C and the specific value is 1.0°C, so the adjustment unit 1003 calculates 24.0°C as the dehumidification temperature. Then, the adjustment unit 1003 sets the calculated dehumidification temperature (24.0°C) to the air conditioning unit 10.

[0057] (S111) The adjustment unit 1003 controls the outdoor unit 13, heat exchanger 30, and blower 40 to operate the air conditioning system 10 so that the temperature of room 1 becomes the dehumidification temperature.

[0058] Here, since the air conditioning unit 10 is operating in cooling mode, a refrigerant in a low-temperature, liquid state is supplied to the heat exchanger 30. Then, the air surrounding the heat exchanger 30 and the refrigerant supplied to the heat exchanger 30 exchange heat, causing the air surrounding the heat exchanger 30 to cool. As a result, the moisture contained in the cooled air surrounding the heat exchanger 30 is removed by condensation on the cold surface of the heat exchanger 30. In this way, the air surrounding the heat exchanger 30 is dehumidified. In particular, since the dehumidification temperature is set lower than the target temperature in the air conditioning unit 10, the temperature of the refrigerant supplied to the heat exchanger 30 is lower than when the target temperature is set in the air conditioning unit 10. Therefore, the air surrounding the heat exchanger 30 is more dehumidified when the dehumidification temperature is set in the air conditioning unit 10 compared to when the target temperature is set in the air conditioning unit 10.

[0059] The air conditioning unit 10 then uses the fan 40 to discharge the dehumidified air around the heat exchanger 30 into room 1. In other words, the air conditioning unit 10 can blow dehumidified air into room 1 by performing cooling operation with the dehumidification temperature set.

[0060] (S112) The acquisition unit 1001 acquires the temperature of room 1 measured by the thermometer 14 after the process in S111. The adjustment unit 1003 then compares the temperature of room 1 acquired by the acquisition unit 1001 with the target temperature. If the temperature of room 1 is higher than the target temperature (S112: YES), the adjustment unit 1003 then performs the process in S113. On the other hand, if the temperature of room 1 is lower than or equal to the target temperature (S112: NO), the adjustment unit 1003 then performs the process in S116. Note that in S112, if the temperature of room 1 is higher than or equal to the target temperature, the adjustment unit 1003 may then perform the process in S113. If the temperature of room 1 is lower than the target temperature, the adjustment unit 1003 then performs the process in S116.

[0061] (S113) The acquisition unit 1001 acquires the humidity of room 1 as measured by the hygrometer 15 after the process in S112. The adjustment unit 1003 then compares the humidity of room 1 acquired by the acquisition unit 1001 with the target humidity. If the humidity of room 1 is less than or equal to the target humidity (S113: YES), the adjustment unit 1003 then performs the process in S114. On the other hand, if the humidity of room 1 is higher than the target humidity (S113: NO), the adjustment unit 1003 then performs the process in S111. Note that in S113, if the humidity of room 1 is lower than the target humidity, the adjustment unit 1003 may then perform the process in S114. If the humidity of room 1 is equal to or greater than the target humidity, the adjustment unit 1003 then performs the process in S111.

[0062] (S114) The adjustment unit 1003 sets the target temperature to the air conditioning unit 10. In this embodiment, the adjustment unit 1003 sets the target temperature of 25.0°C to the air conditioning unit 10 instead of the dehumidification temperature of 24.0°C.

[0063] (S115) The adjustment unit 1003 controls the outdoor unit 13, heat exchanger 30, and blower 40 to operate the air conditioning system 10 so that the temperature of room 1 reaches the target temperature. Once the temperature of room 1 reaches the target temperature, the adjustment unit 1003 controls the outdoor unit 13, heat exchanger 30, and blower 40 to operate the air conditioning system 10 so that the temperature of room 1 maintains the target temperature.

[0064] (S116) The acquisition unit 1001 acquires the humidity of room 1 as measured by the hygrometer 15 after the process in S112. The adjustment unit 1003 then compares the humidity of room 1 acquired by the acquisition unit 1001 with the target humidity. If the humidity of room 1 is less than or equal to the target humidity (S116: YES), the adjustment unit 1003 then performs the process in S117. On the other hand, if the humidity of room 1 is higher than the target humidity (S116: NO), the adjustment unit 1003 then performs the process in S118. Note that in S116, if the humidity of room 1 is lower than the target humidity, the adjustment unit 1003 may then perform the process in S117. If the humidity of room 1 is equal to or greater than the target humidity, the adjustment unit 1003 then performs the process in S118.

[0065] (S117) The measurement unit 1002 stops measuring the time during which the temperature of room 1 is below the target temperature. Then, the measurement unit 1002 resets the measured time. Next, the adjustment unit 1003 performs the process in S114.

[0066] (S118) The adjustment unit 1003 determines whether the measurement unit 1002 is measuring the time during which the indoor temperature of room 1 is equal to or higher than the target temperature. If the measurement unit 1002 is not measuring time (S118: NO), the adjustment unit 1003 then proceeds to process S119. On the other hand, if the measurement unit 1002 is measuring time (S118: YES), the adjustment unit 1003 then proceeds to process S120.

[0067] (S119) The measurement unit 1002 starts measuring the time during which the temperature of room 1 is below or below the target temperature. In this embodiment, the measurement unit 1002 measures the time during which the temperature of room 1 is below the target temperature. Subsequently, the adjustment unit 1003 performs the process in S111.

[0068] (S120) The adjustment unit 1003 compares the time during which the temperature of room 1, as measured by the measurement unit 1002, is below the target temperature with the second time. First, the adjustment unit 1003 obtains the second time (600 seconds in this embodiment) from the main memory 102. Next, the adjustment unit 1003 obtains the time being measured by the measurement unit 1002. Then, the adjustment unit 1003 compares the time being measured by the measurement unit 1002 with the second time. If the time being measured by the measurement unit 1002 is equal to or greater than the second time (S120: YES), the adjustment unit 1003 then performs the process in S121. On the other hand, if the time being measured by the measurement unit 1002 is shorter than the second time (S120: NO), the adjustment unit 1003 then performs the process in S111. Note that in S120, if the time being measured by the measurement unit 1002 is longer than the second time, the adjustment unit 1003 may then perform the process in S121. Then, if the time measured by the measuring unit 1002 is less than or equal to the second hour, the adjustment unit 1003 proceeds to perform the process in S111.

[0069] (S121) The measurement unit 1002 stops measuring the time during which the temperature of room 1 is below the target temperature. Then, the measurement unit 1002 resets the measured time. Next, the adjustment unit 1003 performs the process in S122.

[0070] (S122) The adjustment unit 1003 sets the target temperature to the air conditioning unit 10. In this embodiment, the adjustment unit 1003 sets the target temperature of 25.0°C to the air conditioning unit 10 instead of the dehumidification temperature of 24.0°C.

[0071] (S123) The adjustment unit 1003 controls the outdoor unit 13, heat exchanger 30, and blower 40 to operate the air conditioning system 10 so that the temperature of room 1 reaches the target temperature. Then, the adjustment unit 1003 proceeds with the process in S104.

[0072] The air conditioning unit 10, which performs the above processing, sets a dehumidification temperature that is a specific value lower than the target temperature if the humidity in room 1 remains higher than the target humidity for 1 hour or longer. The air conditioning unit 10 then operates so that the temperature of room 1 becomes the dehumidification temperature. When the air conditioning unit 10 operates with the dehumidification temperature set, it blows air into room 1 that is cooler and dehumidified compared to when it operates with the target temperature set. In other words, the air conditioning unit 10 can blow out dehumidified air without including a process to heat the air during operation.

[0073] Furthermore, the air conditioning unit 10 operates with the dehumidification temperature set, and when the humidity in room 1 falls below or below the target humidity, it sets the target temperature instead of the dehumidification temperature. Then, the air conditioning unit 10 operates so that the temperature in room 1 reaches the target temperature. In other words, the air conditioning unit 10 does not lower the temperature in room 1 too much.

[0074] Furthermore, the air conditioning unit 10 operates with the dehumidification temperature set, and if the temperature of room 1 remains below or below the target temperature for two hours or more, it sets the target temperature instead of the dehumidification temperature. Then, the air conditioning unit 10 operates so that the temperature of room 1 reaches the target temperature. In other words, the air conditioning unit 10 can operate for a certain period of time with the dehumidification temperature set.

[0075] Furthermore, if the humidity in room 1 is equal to or higher than the target humidity, the air conditioning unit 10 can repeatedly switch between operating with a set dehumidification temperature and operating with a set target temperature. In other words, the air conditioning unit 10 can adjust the humidity in room 1 while bringing the temperature of room 1 closer to the target temperature.

[0076] In the first embodiment, if the temperature of room 1 was below the target temperature (S112: NO) as a result of the comparison by the adjustment unit 1003, the adjustment unit 1003 performed the process in S116. However, the adjustment unit 1003 may perform the process in S118 without performing the process in S116.

[0077] Using the flowchart in Figure 5, the processing flow of the acquisition unit 1001, measurement unit 1002, and adjustment unit 1003 in the modified example will be explained. In the modified example, steps not related to S116 and S117 are as described above, so a detailed explanation will be omitted. Here, only S112 will be explained.

[0078] (S112) The acquisition unit 1001 acquires the temperature of room 1 as measured by the thermometer 14 after the process in S111. The adjustment unit 1003 then compares the temperature of room 1 acquired by the acquisition unit 1001 with the target temperature. If the temperature of room 1 is higher than the target temperature (S112: YES), the adjustment unit 1003 then performs the process in S113. On the other hand, if the temperature of room 1 is lower than or equal to the target temperature (S112: NO), the adjustment unit 1003 then performs the process in S118. Note that in S112, if the temperature of room 1 is higher than or equal to the target temperature, the adjustment unit 1003 may then perform the process in S113. If the temperature of room 1 is lower than the target temperature, the adjustment unit 1003 then performs the process in S118.

[0079] In the above modified configurations, the air conditioning unit 10 can blow out dehumidified air without requiring a step to heat the air during operation.

[0080] The first embodiment of the present invention has been described above. In the second, third, and fourth embodiments described next, components similar to those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and detailed descriptions are omitted.

[0081] ==Second Embodiment== The control unit 100 of the second embodiment differs from the control unit 100 of the first embodiment in some functions. Specifically, the measurement unit 1002 does not measure time. Also, the adjustment unit 1003 does not compare the time measured by the measurement unit 1002 with the first or second time.

[0082] <Processing flow> The flowchart in Figure 6 will be used to explain the processing flow performed by the control unit 100 in the second embodiment. In the second embodiment, the acquisition unit 1001, the measurement unit 1002, and the adjustment unit 1003 perform the processing described in steps S201 to S214 below. Note that the processing in steps S201 to S204 is the same as the processing in steps S101 to S104 of the first embodiment, so a detailed explanation will be omitted. Here, we will explain S205 to S214.

[0083] (S205) The adjustment unit 1003 compares the humidity of room 1 acquired by the acquisition unit 1001 in S204 with the target humidity acquired in S201. If the humidity of room 1 is higher than the target humidity (S205: YES), the adjustment unit 1003 then performs the process in S206. On the other hand, if the humidity of room 1 is less than or equal to the target humidity (S205: NO), the adjustment unit 1003 then performs the process in S211. Note that in S205, if the humidity of room 1 is greater than or equal to the target humidity, the adjustment unit 1003 may then perform the process in S206. If the humidity of room 1 is lower than the target humidity, the adjustment unit 1003 then performs the process in S211.

[0084] (S206) The adjustment unit 1003 calculates the dehumidification temperature and sets it to the air conditioning unit 10. First, the adjustment unit 1003 obtains a specific value from the main memory 102 to calculate the dehumidification temperature. Next, the adjustment unit 1003 subtracts a specific value from the target temperature to calculate the dehumidification temperature. Then, the adjustment unit 1003 sets the calculated dehumidification temperature to the air conditioning unit 10.

[0085] (S207) The adjustment unit 1003 controls the outdoor unit 13, heat exchanger 30, and blower 40 to operate the air conditioning system 10 so that the temperature of room 1 becomes the dehumidification temperature.

[0086] (S208) The acquisition unit 1001 acquires the temperature of room 1 as measured by the thermometer 14 after the process in S207. The adjustment unit 1003 then compares the temperature of room 1 acquired by the acquisition unit 1001 with the target temperature. If the temperature of room 1 is higher than the target temperature (S208: YES), the adjustment unit 1003 then performs the process in S209. On the other hand, if the temperature of room 1 is lower than or equal to the target temperature (S208: NO), the adjustment unit 1003 then performs the process in S212. Note that in S208, if the temperature of room 1 is higher than or equal to the target temperature, the adjustment unit 1003 may then perform the process in S209. If the temperature of room 1 is lower than the target temperature, the adjustment unit 1003 then performs the process in S212.

[0087] (S209) The acquisition unit 1001 acquires the humidity of room 1 as measured by the hygrometer 15 after the processing in S208. The adjustment unit 1003 then compares the humidity of room 1 acquired by the acquisition unit 1001 with the target humidity. If the humidity of room 1 is less than or equal to the target humidity (S209: YES), the adjustment unit 1003 then performs the processing in S210. On the other hand, if the humidity of room 1 is higher than the target humidity (S209: NO), the adjustment unit 1003 then performs the processing in S207. Note that in S209, if the humidity of room 1 is lower than the target humidity, the adjustment unit 1003 may then perform the processing in S210. If the humidity of room 1 is equal to or greater than the target humidity, the adjustment unit 1003 then performs the processing in S207.

[0088] (S210) The adjustment unit 1003 sets the target temperature to the air conditioning unit 10.

[0089] (S211) The adjustment unit 1003 controls the outdoor unit 13, heat exchanger 30, and blower 40 to operate the air conditioning system 10 so that the temperature of room 1 reaches the target temperature. Once the temperature of room 1 reaches the target temperature, the adjustment unit 1003 controls the outdoor unit 13, heat exchanger 30, and blower 40 to operate the air conditioning system 10 so that the temperature of room 1 maintains the target temperature.

[0090] (S212) The acquisition unit 1001 acquires the humidity of room 1 as measured by the hygrometer 15 after the processing in S208. The adjustment unit 1003 then compares the humidity of room 1 acquired by the acquisition unit 1001 with the target humidity. If the humidity of room 1 is less than or equal to the target humidity (S212: YES), the adjustment unit 1003 then performs the processing in S210. On the other hand, if the humidity of room 1 is higher than the target humidity (S212: NO), the adjustment unit 1003 then performs the processing in S213. Note that in S212, if the humidity of room 1 is lower than the target humidity, the adjustment unit 1003 may then perform the processing in S210. If the humidity of room 1 is equal to or greater than the target humidity, the adjustment unit 1003 then performs the processing in S213.

[0091] (S213) The adjustment unit 1003 sets the target temperature to the air conditioning unit 10.

[0092] (S214) The adjustment unit 1003 controls the outdoor unit 13, heat exchanger 30, and blower 40 to operate the air conditioning system 10 so that the temperature of room 1 reaches the target temperature. Then, the adjustment unit 1003 proceeds with the process in S204.

[0093] ==Third Embodiment== The control unit 100 of the third embodiment differs in some functions from the control unit 100 of the second embodiment. Specifically, the adjustment unit 1003 operates the air conditioning system 10 so that the temperature of room 1 becomes the dehumidification temperature, and then, if the temperature of room 1 is below or below the target temperature, it does not compare the humidity of room 1 with the target humidity. Furthermore, the adjustment unit 1003 does not perform the processing that would normally be performed after the process of comparing the humidity of room 1 with the target humidity.

[0094] <Processing flow> The flowchart in Figure 7 will be used to explain the processing flow performed by the control unit 100 in the third embodiment. In the third embodiment, the acquisition unit 1001, the measurement unit 1002, and the adjustment unit 1003 perform the processing described in each of the following steps S301 to S311. Note that the processing in steps S301 to S304 is the same as the processing in steps S101 to S104 of the first embodiment, so a detailed explanation will be omitted. Also, the processing in steps S305 to S307 and S309 to S311 is the same as the processing in steps S205 to S207 and S209 to S211 of the second embodiment, so a detailed explanation will be omitted. Here, we will explain S308.

[0095] (S308) The acquisition unit 1001 acquires the temperature of room 1 as measured by the thermometer 14 after the process in S307. The adjustment unit 1003 then compares the temperature of room 1 acquired by the acquisition unit 1001 with the target temperature. If the temperature of room 1 is higher than the target temperature (S308: YES), the adjustment unit 1003 then performs the process in S309. On the other hand, if the temperature of room 1 is lower than or equal to the target temperature (S308: NO), the adjustment unit 1003 then performs the process in S310. Note that in S308, if the temperature of room 1 is higher than or equal to the target temperature, the adjustment unit 1003 may then perform the process in S309. If the temperature of room 1 is lower than the target temperature, the adjustment unit 1003 then performs the process in S310.

[0096] ==Fourth Embodiment== The control unit 100 of the fourth embodiment differs from the control unit 100 of the third embodiment in some functions. Specifically, the adjustment unit 1003 operates the air conditioning system 10 so that the temperature of room 1 becomes the dehumidification temperature, and then does not compare the temperature of room 1 with the target temperature.

[0097] <Processing flow> The flowchart in Figure 8 will be used to explain the processing flow performed by the control unit 100 in the fourth embodiment. In the fourth embodiment, the acquisition unit 1001, the measurement unit 1002, and the adjustment unit 1003 perform the processing described in each of the following steps S401 to S410. Note that the processing in steps S401 to S404 is the same as the processing in steps S101 to S104 of the first embodiment, so a detailed explanation will be omitted. Also, the processing in steps S405 to S407, S409, and S410 is the same as the processing in steps S205 to S207, S210, and S211 of the second embodiment, so a detailed explanation will be omitted. Here, we will explain S408.

[0098] (S408) The acquisition unit 1001 acquires the humidity of room 1 as measured by the hygrometer 15 after the processing in S407. The adjustment unit 1003 then compares the humidity of room 1 acquired by the acquisition unit 1001 with the target humidity. If the humidity of room 1 is less than or equal to the target humidity (S408: YES), the adjustment unit 1003 then performs the processing in S409. On the other hand, if the humidity of room 1 is higher than the target humidity (S408: NO), the adjustment unit 1003 then performs the processing in S407. In addition, if the humidity of room 1 is lower than the target humidity in S408, the adjustment unit 1003 may then perform the processing in S409. If the humidity of room 1 is equal to or greater than the target humidity, the adjustment unit 1003 then performs the processing in S407.

[0099] <Effects> (Aspect 1) In this embodiment, the control method for the air conditioning system 10 includes: a first process of operating the air conditioning system 10 so that the temperature of the room in which the air conditioning system 10 is installed becomes a preset target temperature; a second process of setting a dehumidification temperature that is a specific value lower than the target temperature if the humidity of the room obtained after the first process is equal to or higher than a preset target humidity; a third process of operating the air conditioning system 10 so that the temperature of the room becomes the dehumidification temperature; a fourth process of setting the dehumidification temperature to the target temperature if the humidity of the room obtained after the third process is equal to or lower than the target humidity; and a fifth process of operating the air conditioning system 10 so that the temperature of the room becomes the target temperature after the fourth process.

[0100] According to the above method, if the humidity in the room obtained after the first process is equal to or higher than a preset target humidity, the air conditioner 10 performs a second process to set a dehumidification temperature that is a specific value lower than the target temperature. Next, the air conditioner 10 performs a third process to operate itself so that the room temperature becomes the dehumidification temperature. Then, if the humidity in the room obtained after the third process is equal to or lower than the target humidity, the air conditioner 10 performs a fourth process to set the dehumidification temperature to the target temperature. In other words, the air conditioner 10 can blow out dehumidified air without providing a process to heat the air. Therefore, it is possible to provide an air conditioner that can adjust temperature and humidity while suppressing power consumption.

[0101] (Aspect 2) In aspect 1, the control method for the air conditioning unit 10 performs a fourth process if the room temperature obtained after the third process is less than or equal to the target temperature or lower than the target temperature.

[0102] According to the above method, if the room temperature obtained after the third process is below or lower than the target temperature, the air conditioning unit 10 sets the target temperature instead of the dehumidification temperature. Therefore, the air conditioning unit 10 does not lower the temperature of room 1 too much.

[0103] (Aspect 3) In aspect 1 or 2, the control method for the air conditioning unit 10 performs a sixth process to set the dehumidification temperature to the target temperature if the indoor humidity obtained after the third process is equal to or higher than the target humidity, a seventh process to operate the air conditioning unit 10 so that the indoor temperature becomes the target temperature after the sixth process, and performs a second process if the indoor humidity obtained after the seventh process is equal to or lower than the target humidity.

[0104] According to the above method, if the humidity in the room obtained after the third process is equal to or higher than the target humidity, the air conditioner 10 performs a sixth process to set the dehumidification temperature to the target temperature. Next, after the sixth process, the air conditioner 10 performs a seventh process to operate so that the room temperature becomes the target temperature. Then, if the humidity in the room obtained after the seventh process is equal to or lower than the target humidity, the air conditioner 10 performs a second process. In other words, when the humidity in the room is equal to or higher than the target humidity, the air conditioner 10 alternately repeats the state of operating with the dehumidification temperature set and the state of operating with the target temperature set. Therefore, the air conditioner 10 can adjust the humidity in room 1 while bringing the temperature of room 1 closer to the target temperature.

[0105] (Aspect 4) In Aspect 1, if the indoor humidity obtained after the first process is equal to or higher than the target humidity for 1 hour or longer, the second process is performed. If the indoor temperature obtained after the third process is equal to or lower than the target temperature for 2 hours or longer, the sixth process is performed to set the dehumidification temperature to the target temperature. After the sixth process, the seventh process is performed to operate the air conditioning unit 10 so that the indoor temperature reaches the target temperature. If the indoor humidity obtained after the seventh process is equal to or lower than the target humidity, the second process is performed.

[0106] (Aspect 5) In Aspect 1, if the indoor humidity obtained after the first process is equal to or higher than the target humidity, or the time spent in a state where it is higher than the target humidity is 1 hour or longer, then the second process is performed. If the indoor humidity obtained after the third process is equal to or lower than the target humidity, and the indoor temperature obtained after the third process is equal to or lower than the target temperature, then the sixth process is performed to set the dehumidification temperature to the target temperature. After the sixth process, the seventh process is performed to operate the air conditioning unit 10 so that the indoor temperature becomes the target temperature. If the indoor humidity obtained after the seventh process is equal to or lower than the target humidity, then the second process is performed.

[0107] According to the above method, if the room temperature obtained after the third process remains below or below the target temperature for two hours or longer, the air conditioning unit 10 performs a sixth process to set the dehumidification temperature to the target temperature. In other words, even if the room temperature is below or below the target temperature, the air conditioning unit 10 does not immediately set the target temperature, but waits for two hours or more before setting the dehumidification temperature. Therefore, the air conditioning unit 10 can operate for a certain period of time with the dehumidification temperature set.

[0108] Furthermore, according to the above method, the air conditioning unit 10 performs the second process if the indoor humidity obtained after the first process is equal to or higher than the target humidity, or if the time spent in that state is 1 hour or longer than 1 hour. In other words, even if the indoor humidity is equal to or higher than the target humidity, the air conditioning unit 10 does not immediately set the dehumidification temperature, but waits for 1 hour or more to set the dehumidification temperature. Therefore, the air conditioning unit 10 can operate for a certain period of time with the target temperature set.

[0109] Furthermore, as mentioned above, the air conditioning unit 10 can operate for a certain period of time with a set dehumidification temperature, and can also operate for a certain period of time with a set target temperature. Therefore, the air conditioning unit 10 is less prone to the hunting phenomenon, which occurs when it repeatedly switches between operating with a set dehumidification temperature and operating with a set target temperature in a short period of time.

[0110] (Aspect 6) In this embodiment, the air conditioning system 10 includes a heat exchanger 30 for cooling the indoor air, a blower 40 for blowing the air cooled by the heat exchanger 30 into the room, and a control unit 100 for controlling the heat exchanger 30 and the blower 40. The control unit 100 performs the following: a first process of operating the heat exchanger 30 and the blower 40 so that the indoor temperature becomes a preset target temperature; a second process of setting a dehumidification temperature that is a specific value lower than the target temperature if the indoor humidity obtained after the first process is equal to or higher than a preset target humidity; a third process of operating the heat exchanger 30 and the blower 40 so that the indoor temperature becomes the dehumidification temperature; a fourth process of setting the dehumidification temperature to the target temperature if the indoor humidity obtained after the third process is equal to or lower than the target humidity; and a fifth process of operating the heat exchanger 30 and the blower 40 so that the indoor temperature becomes the target temperature after the fourth process.

[0111] According to the above air conditioning system 10, if the indoor humidity obtained after the first process is equal to or higher than a preset target humidity, the control unit 100 performs a second process to set a dehumidification temperature that is a specific value lower than the target temperature. Next, the control unit 100 performs a third process to operate the heat exchanger 30 and the blower 40 so that the indoor temperature becomes the dehumidification temperature. Then, if the indoor humidity obtained after the third process is equal to or lower than the target humidity, the control unit 100 performs a fourth process to set the dehumidification temperature to the target temperature. In other words, the air conditioning system 10 can blow out dehumidified air without providing a process to heat the air. Therefore, it is possible to provide an air conditioning system that can adjust temperature and humidity while suppressing power consumption.

[0112] (Aspect 7) In aspect 6, if the room temperature obtained after the third process is less than or equal to the target temperature, the control unit 100 performs the fourth process.

[0113] According to the air conditioning system 10 described above, if the room temperature obtained after the third process is below or lower than the target temperature, the control unit 100 sets the target temperature instead of the dehumidification temperature. Therefore, the air conditioning system 10 does not lower the temperature of room 1 too much.

[0114] (Aspect 8) In aspect 6, if the indoor humidity obtained after the third process is equal to or higher than the target humidity, the control unit 100 performs a sixth process to set the dehumidification temperature to the target temperature, and after the sixth process, performs a seventh process to operate the heat exchanger 30 and the blower 40 so that the indoor temperature becomes the target temperature, and if the indoor humidity obtained after the seventh process is equal to or lower than the target humidity, the control unit 100 performs the second process.

[0115] According to the air conditioning system 10 described above, if the humidity in the room obtained after the third process is equal to or higher than the target humidity, the control unit 100 performs a sixth process to set the dehumidification temperature to the target temperature. Next, after the sixth process, the control unit 100 performs a seventh process to operate the heat exchanger 30 and the blower 40 so that the room temperature becomes the target temperature. Then, if the humidity in the room obtained after the seventh process is equal to or lower than the target humidity, the control unit 100 performs a second process. In other words, when the humidity in the room is equal to or higher than the target humidity, the air conditioning system 10 alternately repeats the state of operating with the dehumidification temperature set and the state of operating with the target temperature set. Therefore, the air conditioning system 10 can adjust the humidity in room 1 while bringing the temperature of room 1 closer to the target temperature.

[0116] (Aspect 9) In aspect 6, the control unit 100 performs a second process if the indoor humidity obtained after the first process is at or below the target humidity or lower than the target humidity for 1 hour or longer or longer than 1 hour. If the indoor temperature obtained after the third process is at or below the target temperature or lower than the target temperature for 2 hours or longer or longer than 2 hours, it performs a sixth process to set the dehumidification temperature to the target temperature. After the sixth process, it performs a seventh process to operate the heat exchanger 30 and the blower 40 so that the indoor temperature reaches the target temperature. If the indoor humidity obtained after the seventh process is at or below the target humidity or lower than the target humidity, it performs the second process.

[0117] (Aspect 10) In aspect 6, if the control unit 100 has been in a state where the indoor humidity obtained after the first process is below or below the target humidity for 1 hour or longer, it performs a second process. If the indoor humidity obtained after the third process is below or below the target humidity, and the indoor temperature obtained after the third process is below or below the target temperature for 2 hours or longer, it performs a sixth process to set the dehumidification temperature to the target temperature. After the sixth process, it performs a seventh process to operate the heat exchanger 30 and the blower 40 so that the indoor temperature reaches the target temperature. If the indoor humidity obtained after the seventh process is below or below the target humidity, it performs the second process.

[0118] According to the air conditioning system 10 described above, if the control unit 100 has been at or below the target temperature for two hours or longer since the third processing, it performs a sixth process to set the dehumidification temperature to the target temperature. In other words, even if the indoor temperature is at or below the target temperature, the air conditioning system 10 does not immediately set the target temperature, but waits for two hours or more before setting the dehumidification temperature. Therefore, the air conditioning system 10 can operate for a certain period of time with the dehumidification temperature set.

[0119] Furthermore, the control device 100 performs a second process if the indoor humidity acquired after the first process is equal to or higher than the target humidity, or if the time spent in this state is 1 hour or longer than 1 hour. In other words, even if the indoor humidity is equal to or higher than the target humidity, the air conditioning unit 10 does not immediately set the dehumidification temperature, but waits for 1 hour or more to set it. Therefore, the air conditioning unit 10 can operate for a certain period of time with the target temperature set.

[0120] Furthermore, as mentioned above, the air conditioning unit 10 can operate for a certain period of time with a set dehumidification temperature, and can also operate for a certain period of time with a set target temperature. Therefore, the air conditioning unit 10 is less prone to the hunting phenomenon, which occurs when it repeatedly switches between operating with a set dehumidification temperature and operating with a set target temperature in a short period of time. [Explanation of Symbols]

[0121] 1… Room (indoors) 10...Air conditioner 30...Heat exchanger 40... Blower 100... Control Unit

Claims

1. A method for controlling an air conditioning system, A first process involves operating the air conditioning system so that the temperature of the room in which the air conditioning system is installed reaches a predetermined target temperature. If the humidity in the room obtained after the first process is equal to or higher than a preset target humidity, a second process is performed to set a dehumidification temperature that is a specific value lower than the target temperature. A third process involves operating the air conditioning system so that the temperature of the room becomes the dehumidification temperature, If the humidity inside the room obtained after the third process is less than or equal to the target humidity, or lower than the target humidity, a fourth process is performed to set the dehumidification temperature to the target temperature. A fifth process is performed after the fourth process, in which the air conditioning system is operated so that the room temperature reaches the target temperature. A control method including

2. The control method according to claim 1, wherein if the room temperature obtained after the third process is less than or equal to the target temperature or lower than the target temperature, the fourth process is performed.

3. If the humidity inside the room obtained after the third process is equal to or higher than the target humidity, a sixth process is performed to set the dehumidification temperature to the target temperature. After the sixth process, a seventh process is performed in which the air conditioning system is operated so that the room temperature reaches the target temperature. The control method according to claim 1, wherein if the humidity in the room obtained after the seventh process is less than or equal to the target humidity or lower than the target humidity, the second process is performed.

4. If the humidity inside the room obtained after the first process is equal to or greater than the target humidity, or if the duration of time when the humidity is higher than the target humidity is 1 hour or longer than 1 hour, then the second process is performed. If the room temperature obtained after the third process is below or below the target temperature for a period of two hours or longer, then a sixth process is performed to set the dehumidification temperature to the target temperature. After the sixth process, a seventh process is performed in which the air conditioning system is operated so that the room temperature reaches the target temperature. The control method according to claim 1, wherein if the humidity in the room obtained after the seventh process is less than or equal to the target humidity or lower than the target humidity, the second process is performed.

5. If the humidity inside the room obtained after the first process is equal to or greater than the target humidity, or if the duration of time when the humidity is higher than the target humidity is 1 hour or longer than 1 hour, then the second process is performed. If the humidity inside the room obtained after the third process is less than or equal to the target humidity, and the time during which the temperature inside the room obtained after the third process is less than or equal to the target temperature is two hours or longer than two hours, A sixth process is performed to set the dehumidification temperature to the target temperature. After the sixth process, a seventh process is performed in which the air conditioning system is operated so that the room temperature reaches the target temperature. The control method according to claim 1, wherein if the humidity in the room obtained after the seventh process is less than or equal to the target humidity or lower than the target humidity, the second process is performed.

6. A heat exchanger that cools the indoor air, A blower that blows the air cooled by the heat exchanger into the room, A control unit that controls the heat exchanger and the blower, An air conditioning system equipped with, The control unit, A first process involves operating the heat exchanger and the blower so that the temperature of the room reaches a predetermined target temperature. If the humidity in the room obtained after the first process is equal to or higher than a preset target humidity, a second process is performed to set a dehumidification temperature that is a specific value lower than the target temperature. A third process involves operating the heat exchanger and the blower so that the room temperature becomes the dehumidification temperature, If the humidity inside the room obtained after the third process is less than or equal to the target humidity, or lower than the target humidity, a fourth process is performed to set the dehumidification temperature to the target temperature. After the fourth process, a fifth process is performed in which the heat exchanger and the blower are operated so that the room temperature reaches the target temperature. Air conditioner.

7. The control unit, The air conditioning device according to claim 6, which performs the fourth process if the room temperature obtained after the third process is less than or equal to the target temperature or lower than the target temperature.

8. The control unit, If the humidity inside the room obtained after the third process is equal to or higher than the target humidity, a sixth process is performed to set the dehumidification temperature to the target temperature. After the sixth process, a seventh process is performed in which the heat exchanger and the blower are operated so that the room temperature reaches the target temperature. The air conditioning device according to claim 6, which performs the second process if the humidity in the room obtained after the seventh process is less than or equal to the target humidity or lower than the target humidity.

9. The control unit, If the humidity inside the room obtained after the first process is less than or equal to the target humidity, or if the duration of time is 1 hour or longer than 1 hour, then the second process is performed. If the room temperature obtained after the third process is below or below the target temperature for a period of two hours or longer, then a sixth process is performed to set the dehumidification temperature to the target temperature. After the sixth process, a seventh process is performed in which the heat exchanger and the blower are operated so that the room temperature reaches the target temperature. The air conditioning device according to claim 6, which performs the second process if the humidity in the room obtained after the seventh process is less than or equal to the target humidity or lower than the target humidity.

10. The control unit, If the humidity inside the room obtained after the first process is less than or equal to the target humidity, or if the duration of time is 1 hour or longer than 1 hour, then the second process is performed. If the humidity inside the room obtained after the third process is less than or equal to the target humidity, and the time during which the temperature inside the room obtained after the third process is less than or equal to the target temperature is two hours or longer than two hours, A sixth process is performed to set the dehumidification temperature to the target temperature. After the sixth process, a seventh process is performed in which the heat exchanger and the blower are operated so that the room temperature reaches the target temperature. The air conditioning device according to claim 6, which performs the second process if the humidity in the room obtained after the seventh process is less than or equal to the target humidity or lower than the target humidity.

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