JP7357673B2 - Control device, air environment adjustment system, air environment adjustment method, program, and recording medium - Google Patents

Description

The present invention relates to a control device for adjusting an indoor air environment, an air environment adjustment system, an air environment adjustment method, a program, and a recording medium on which the program is recorded, and in particular, the ventilation volume control of a ventilation system based on information from an air conditioner. Concerning those who do.

It has become common for living rooms in houses to be ventilated continuously for 24 hours, and the law requires that equipment be installed that can exchange half the air in the room every hour, for example. In addition, as housing frames become more airtight and highly insulated, air conditioning loads are becoming smaller, which means that installed air conditioners are often operated at less than half their maximum air conditioning capacity.

Generally, ventilation equipment and air conditioning equipment are operated independently and are not functionally linked. Although it is possible to reduce the power consumption of air conditioners and improve the thermal environment by temporarily reducing or increasing the ventilation volume, there is no means of communication between the devices, so It wasn't functioning well.

In order to avoid such problems, there has conventionally been a system in which a ventilation device and an air conditioner are communicably connected and operate in cooperation with each other (for example, see Patent Document 1). In Patent Document 1, the ventilation amount of the ventilation device is controlled according to the operation mode of the air conditioner. Specifically, when the air conditioner enters thermo-off operation, the ventilation amount of the ventilation device is suppressed to prevent outdoor air from flowing in. This reduces the time it takes for the room temperature to converge to the set temperature, and prevents the room temperature from dropping suddenly.

Japanese Patent Application Publication No. 2014-134343

As the building blocks of houses become more airtight and highly insulated, the air conditioning load becomes smaller, and when the air conditioning load falls below the minimum capacity of the air conditioner, the air conditioner performs a low capacity operation that performs thermo-on and thermo-off control. For example, when the temperature of the room to be air-conditioned reaches a predetermined threshold lower than the set temperature during cooling operation, the air conditioner enters thermo-off control and stops adjusting the temperature in the room to be air-conditioned. Further, when the temperature of the room to be air-conditioned reaches a predetermined threshold value higher than the set temperature due to thermo-off control, the air conditioner enters thermo-on control and resumes temperature adjustment in the room to be air-conditioned. In Patent Document 1, when the air conditioner enters thermo-off control, control is performed to suppress the ventilation amount of the ventilation device, thereby suppressing the time it takes for the room temperature to converge to the set temperature, and preventing the room temperature from dropping suddenly. It's suppressed. However, if such control continues for a long time, the ventilation system continues to operate with a reduced ventilation volume, making it impossible to secure the required ventilation volume. Furthermore, when trying to secure the required amount of ventilation, the amount of ventilation increases during thermo-off control and outdoor air flows in, which increases indoor temperature fluctuations. Therefore, in order to suppress indoor temperature fluctuations, the air conditioner periodically repeats thermo-on and thermo-off control. Furthermore, when attempting to suppress indoor temperature fluctuations in order to improve indoor comfort, the threshold for switching to thermo mode in the air conditioner becomes smaller, so the cycle between thermo-on and thermo-off becomes shorter, and the air conditioner's equipment The number of times the device starts and stops (starts and stops the equipment) increases. This has resulted in problems such as increased energy loss in the air conditioner and shortened lifespan of equipment included in the air conditioner.

The present invention has been made to solve the above-mentioned problems, and it is possible to reduce the number of times the air conditioner starts and stops by controlling the air conditioner's thermo-on and thermo-off while maintaining an appropriate amount of ventilation in the room to be air-conditioned. An object of the present invention is to provide a control device, an air environment adjustment system, an air environment adjustment method, a program, and a recording medium that adjust the indoor air environment by reducing the amount of air.

A control device according to the present invention is a control device that controls the operation of a ventilation device that ventilates air in an air-conditioned room whose room temperature is adjusted by an air conditioner that performs thermo-on control and thermo-off control in a low-capacity operating state, The operating state information of the air conditioner is acquired, the operating state information is stored as operating history information of the air conditioner, and the air conditioner is in the low capacity operating state, and the operating state information is the thermo-off state. In the case of control, the ventilation amount of the ventilation device is set to a thermo-off ventilation amount that is lower than the normal ventilation amount when the air conditioner is normally operating, and the air conditioner is in the low capacity operation state. In some cases, when the operating state information indicates the thermo-on control, the ventilation amount of the ventilation device is set to a thermo-on ventilation amount that is increased from the normal ventilation amount.

An air environment adjustment system according to the present invention includes the control device described above and the ventilation device.

The air environment adjustment method according to the present invention is an air environment adjustment method in an air conditioned room in which the room temperature is adjusted by an air conditioner that performs thermo-on control and thermo-off control in a low capacity operating state, the method comprising: operating state information of the air conditioner; is acquired, the operating state information is stored as operating history information of the air conditioner, and when the air conditioner is in the low capacity operating state and the operating state information is the thermo-off control , The air volume is a thermo-off ventilation volume that is lower than the normal ventilation volume when the air conditioner is normally operating, and the air conditioner is in the low capacity operation state, and the operation status information is In the case of the thermo-on control , the ventilation amount is set to a thermo-on ventilation amount that is increased from the normal ventilation amount.

The program according to the present invention is a computer that controls the operation of a ventilation device that ventilates air in the air conditioned room in an air conditioned room whose room temperature is adjusted by an air conditioner that performs thermo-on control and thermo-off control in a low capacity operating state. is a case where operating state information of the air conditioner is acquired, the operating state information is stored as operating history information of the air conditioner, the air conditioner is in the low capacity operating state, and the operating state information is In the case of the thermo-off control, the ventilation amount of the ventilation device is set to a thermo-off ventilation amount that is lower than the normal ventilation amount when the air conditioner is normally operated, and the air conditioner is in the low capacity operation state. In the case where the operating state information is the thermo-on control, the ventilation device functions as a means for setting the ventilation amount of the ventilation device to a thermo-on ventilation amount that is increased from the normal ventilation amount. .

A recording medium according to the present invention is a computer-readable medium on which the above program is recorded.

According to the present invention, since the ventilation amount of the ventilation device is controlled in accordance with the thermo-on and thermo-off control of the air conditioner, fluctuations in the room temperature of the room to be air-conditioned are suppressed and the time interval between thermo-on and thermo-off of the air conditioner is lengthened. be able to. Therefore, the number of times the air conditioner starts and stops is reduced while maintaining an appropriate amount of ventilation in the air conditioned room, extending the life of the device and reducing energy loss in the air conditioner.

1 is a schematic configuration diagram of an air environment adjustment system 100 in Embodiment 1. FIG. 2 is a detailed configuration diagram of the air environment adjustment system 100 of FIG. 1. FIG. This is an example of control of the ventilation device 20 and the air conditioner 30 when the air conditioner 30 of FIG. 1 is in cooling operation. This is an example of control of the ventilation device 20 and the air conditioner 30 when the air conditioner 30 of FIG. 1 is in cooling operation. 1 is a block diagram showing an example of a control device 10 according to Embodiment 1. FIG. 2 is an operation control flow of the ventilation device 20 by the control device 10 of FIG. 1. FIG. It is an example of the operation pattern of the compressor 41 of the air conditioner 30 in the air environment adjustment system 100 based on Embodiment 1. An example of operation history information of the air conditioner 30 of the air environment adjustment system 100 according to the first embodiment is shown. FIG. 8 is a diagram showing the correlation between the ventilation amount of the ventilation device 20 and the threshold value for switching the thermo-operation of the air conditioner 30 in the third pattern of FIG. 7.

Hereinafter, embodiments will be described in detail using the drawings. Further, the specific structure and setting example described in the embodiments are merely examples, and the present invention is not limited thereto.

In the embodiment, the communication may include wireless communication and wired communication, or a mixture of wireless communication and wired communication. For example, wireless communication may be performed in a certain section, and wired communication may be performed in another space. Further, communication from one device to another device may be performed by wired communication, and communication from another device to a certain device may be performed by wireless communication.

Embodiment 1.
FIG. 1 is a schematic configuration diagram of an air environment adjustment system 100 in the first embodiment. A schematic configuration of the air environment adjustment system 100 will be described based on FIG. 1. The air environment adjustment system 100 includes a control device 10, a ventilation device 20 that ventilates the inside of the air-conditioned room 1, and an air conditioner 30 that air-conditions the inside of the air-conditioned room 1. The control device 10 is communicably connected to a ventilation device 20 and an air conditioner 30. The control device 10 is configured to at least acquire operating state information of the air conditioner 30 from the air conditioner 30 and control the operation of the ventilation device 20. Thereby, the air environment adjustment system 100 coordinates the air conditioner 30 that adjusts the temperature of the air in the air conditioned room 1 and the ventilation device 20 that controls the amount of exchange between the air in the air conditioned room 1 and the outside air. can be controlled.

The air environment adjustment system 100 may be configured to be able to communicate with an external terminal 90 that is a terminal connected by means such as the Internet. In the following description, the information processing performed by the control device 10 may be performed by the external terminal 90. That is, the operating state information of the air conditioner 30 is transmitted from the air conditioner 30 to the external terminal 90, the operating state information of the air conditioner 30 is processed by the external terminal 90, and a control instruction is transmitted from the external terminal 90 to the ventilation device 20. It's okay. The external terminal 90 is, for example, a computer or server installed externally.

Furthermore, the control device 10 may be independent as shown in FIG. 1, but it may also be configured integrally with the ventilation device 20, the air conditioner 30, or other devices.

FIG. 2 is a detailed configuration diagram of the air environment adjustment system 100 of FIG. 1. Based on FIG. 2, the configuration of the air environment adjustment system 100 including the schematic configuration of the ventilation device 20 and the air conditioner 30 will be described. First, the schematic configuration of the ventilation device 20 will be described.

(ventilator 20)
The ventilation device 20 includes an intake pipe 21, an exhaust pipe 22, a total heat exchange section 23, and an outside air direct introduction bypass 24. The total heat exchange section 23 recovers the energy of the air discharged from the air-conditioned room 1. An intake fan 25 is installed in the intake pipe 21, an exhaust fan 26 is installed in the exhaust pipe, and a bypass fan 27 is installed in the outside air direct introduction bypass 24.

The ventilation device 20 is provided with an opening/closing part 29a at a connecting part 29 between the intake pipe 21 and the outside air direct introduction bypass 24. The connecting portion 29 is installed on the way from the suction port 21 a of the intake pipe 21 to the total heat exchange portion 23 . When opened, the opening/closing section 29a can introduce air from the intake pipe 21 into the air-conditioned room 1 without passing through the total heat exchange section 23.

The ventilation device 20 supplies and exhausts air by operating an intake fan 25 and an exhaust fan 26. When the opening/closing section 29a is closed, the outdoor air introduced into the intake pipe 21 by the intake fan 25 is introduced into the air-conditioned room 1 via the total heat exchange section 23. Moreover, regardless of whether the opening/closing part 29a is open or closed, the air in the air-conditioned room 1 introduced into the exhaust pipe 22 by the exhaust fan 26 passes through the total heat exchange part 23 and exits from the exhaust port 22a. It is discharged outside.

The ventilation device 20 can open and close the opening/closing part 29a and change the outputs of the intake fan 25, exhaust fan 26, and bypass fan 27 as necessary. The ventilation device 20 can appropriately vary the amount of ventilation in the air-conditioned room 1, and can also appropriately vary the heat recovery from the air discharged from the air-conditioned room 1.

The ventilation device 20 basically operates continuously for 24 hours to ventilate the room 1 to be air-conditioned. The ventilation device 20 is set to ventilate half the volume of the air-conditioned room 1 in one hour under normal conditions. The ventilation amount of this ventilation device 20 under normal conditions is expressed as "0.5 times/h". The normal ventilation amount of the ventilation device 20 is an example and is not limited to this value, and can be changed as necessary. The ventilation amount of the ventilation device 20 can be varied by control. For example, when the ventilation rate is set to "0.1 times/h", the ventilation device 20 ventilates 1/10 of the volume of the air-conditioned room 1 per hour.

In the first embodiment, the operation of the ventilation device 20 is controlled according to the operating state of the air conditioner 30 that adjusts the room temperature of the room 1 to be air-conditioned. The ventilation control terminal 12 shown in FIG. 2 is a terminal for controlling the operation of the ventilation device 20, and is used to start and stop the operation of the ventilation device 20, change the ventilation amount, etc. . Although the operating state of the ventilation device 20 can be set manually, in the first embodiment, a case will be described in which the ventilation device 20 is controlled by the control device 10. The ventilation control terminal 12 may be configured integrally with the ventilation device 20 or may be configured separately. Further, the ventilation control terminal 12 may be configured integrally with the control device 10.

(Air conditioner 30)
Next, a schematic configuration of the air conditioner 30 will be described. The air conditioner 30 is configured by connecting an indoor unit 31 installed inside the air-conditioned room 1 and an outdoor unit 32 installed outside the air-conditioned room 1 through refrigerant piping. The air conditioner 30 has a refrigeration cycle circuit 40 in which a compressor 41, a flow path switching device 42 such as a four-way valve, an indoor heat exchanger 43, an expansion device 44, and an outdoor heat exchanger 45 are sequentially connected by refrigerant piping. Inside the outdoor unit 32, a compressor 41, a flow path switching device 42, an expansion device 44, and an outdoor heat exchanger 45 are installed. An outdoor blower 49 that sends air to the exchanger 45 is installed. An indoor heat exchanger 43 is installed inside the indoor unit 31, and an indoor blower 47 is installed near the indoor heat exchanger 43 to send air from the room 1 to be air-conditioned to the indoor heat exchanger 43. ing.

The air conditioner 30 mainly performs cooling, heating, dehumidification, humidification, moisturizing, or blowing operation, and adjusts the air in the room 1 to be air-conditioned. The refrigeration cycle circuit 40 circulates the internal refrigerant while compressing and expanding it, thereby forming a heat pump. Moreover, the indoor heat exchanger 43 installed in the air-conditioned room 1 functions as an evaporator during cooling operation, and functions as a condenser during heating operation.

The air conditioner 30 also includes a temperature sensor 33 that measures the room temperature of the room 1 to be air-conditioned, a temperature sensor 34 that measures the temperature of the refrigerant flowing through the indoor heat exchanger 43, and a temperature sensor 35 that measures the temperature of the blown air. It is equipped with

The indoor unit 31 sucks indoor air from the air-conditioned room 1 into the housing, passes it through the indoor heat exchanger 43, and blows it out into the air-conditioned room 1. The air conditioner 30 circulates the refrigerant through the refrigeration cycle circuit 40 and performs heat exchange between the refrigerant and air in the indoor heat exchanger 43 to cool and heat the room 1 to be air-conditioned.

The air conditioner 30 adjusts the air conditioning capacity so that the temperature of the air in the room 1 to be air conditioned becomes a temperature set by, for example, a remote controller. The air conditioning control terminal 13 shown in FIG. 2 is a terminal for controlling the operation of the air conditioner 30, and is used to set a set temperature, etc., and to cause the air conditioner 30 to operate. The air conditioning control terminal 13 may be configured integrally with the indoor unit 31 or the outdoor unit 32, or may be configured separately. Further, the air conditioning control terminal 13 may be configured integrally with the control device 10.

(Control device 10)
The control device 10 controls the operation of the ventilation device 20 based on the operating state information of the air conditioner 30 acquired from the air conditioner 30. As shown in FIG. 2, the control device 10 is communicably connected to each of a room temperature detector 11, a ventilation control terminal 12, and an air conditioning control terminal 13. The room temperature detector 11 detects the temperature of the air in the air-conditioned room 1 and transmits temperature information to the control device 10. However, the control device 10 can acquire temperature information from the temperature sensor 33 of the indoor unit 31 of the air conditioner 30 from the air conditioning control terminal 13 and use it as the temperature of the air in the room 1 to be air conditioned.

The control device 10 acquires operating state information of the air conditioner 30 from the air conditioning control terminal 13 . In the first embodiment, the operating state information of the air conditioner 30 is the frequency of the compressor 41 included in the air conditioner 30. The rotation speed of the compressor 41 is controlled by an inverter, and the rotation is increased, decreased, or stopped depending on the indoor cooling load or heating load. The air conditioning control terminal 13 transmits the frequency of the compressor 41 to the control device 10 as operating state information of the air conditioner 30. The control device 10 processes the frequency of the compressor 41 as operating state information of the air conditioner 30, determines the required ventilation amount, and transmits it as an instruction to the ventilation control terminal 12. The ventilation control terminal 12 controls specific operations of the ventilation device 20.

(Operation of air environment adjustment system 100 when air conditioner 30 is in low capacity operation state)
Next, the operation of the air environment adjustment system 100 according to the first embodiment will be explained. In the following, a case will be described in which the air conditioner 30 performs cooling operation. When adjusting the temperature of the room 1 to be air conditioned, the operating state of the air conditioner 30 is determined according to the cooling load in the room 1 to be air conditioned. For example, when the air in the air conditioned room 1 is high temperature and the difference between the temperature and the target temperature set in the air conditioner 30 is large, the air conditioner 30 increases the rotation speed of the compressor 41 to maintain a high cooling capacity. It is driven by. The cooling load is heat possessed by the air in the air-conditioned room 1, heat sources such as people in the air-conditioned room 1, or heat flowing into the air-conditioned room 1 when the ventilation device 20 performs ventilation. . The ventilation system 20 is normally operated at a ventilation rate of 0.5 times/h. Therefore, the air introduced into the air-conditioned room 1 by the ventilation device 20 serves as a cooling load. When the cooling load of the air-conditioned room 1 is large, the air conditioner 30 is operated at a cooling capacity higher than the cooling load, thereby lowering the temperature of the indoor air. At this time, the compressor 41 is operated at a high rotation speed.

On the other hand, when the temperature of the air in the room 1 to be air conditioned by the air conditioner 30 reaches the target temperature, that is, the temperature set in the air conditioner 30, and the indoor cooling load becomes small, the air conditioner 30 enters a low capacity operation state. It is driven by. At this time, if the cooling capacity required for the air conditioner 30 is below the minimum output, the air conditioner 30 is subjected to thermo-off control and thermo-on control.

FIG. 3 is an example of control of the ventilation device 20 and the air conditioner 30 when the air conditioner 30 of FIG. 1 is in cooling operation. FIG. 3 shows the operating state of the air conditioner 30 and changes in temperature when the ventilation device 20 has a normal ventilation amount. The air conditioner 30 repeatedly operates and stops in order to maintain the temperature of the air in the air-conditioned room 1 within a predetermined range. In the first embodiment, when the temperature of the air in the air-conditioned room 1 reaches a temperature 0.5° C. higher than the set temperature, the air conditioner 30 is thermo-on controlled and starts operating. That is, the air conditioner 30 performs cooling operation by starting the compressor 41 and circulating refrigerant through the refrigeration cycle circuit 40. When the cooling capacity of the air conditioner 30 is higher than the cooling load in the air conditioned room 1, the temperature of the air in the air conditioned room 1 decreases, and when the temperature reaches 0.5 degrees Celsius lower than the set temperature, the air conditioner 30 is thermo-off controlled to stop operation. At this time, the air conditioner 30 stops the compressor 41 and enters an operating state in which the indoor heat exchanger 43 does not exchange heat between the refrigerant and the air.

Even when the air conditioner 30 is thermo-on and thermo-off controlled as described above, the ventilation device 20 is still ventilating the air-conditioned room 1 . When the air conditioner 30 is under thermo-on and thermo-off control, if the ventilation device 20 is operated at a ventilation rate of 0.5 times/h as usual, the air conditioner 30 will be controlled to The room temperature fluctuates due to the heat generated by the air introduced into the chamber 1, causing thermo-on and thermo-off control to be repeated frequently. Conventionally, as the air conditioner 30 repeats thermo-on and thermo-off control, the equipment included in the air conditioner 30, particularly the compressor 41, has a problem of increasing the number of times of starting and stopping, and shortening the life of the equipment. Furthermore, as the number of times the air conditioner 30 starts and stops increases, energy loss also increases.

However, in the air environment adjustment system 100 according to the first embodiment, the control device 10 acquires the operating state information of the air conditioner 30 and controls the operation of the ventilation device 20 according to the operating state information of the air conditioner 30. can do.

FIG. 4 is an example of control of the ventilation device 20 and the air conditioner 30 when the air conditioner 30 of FIG. 1 is in cooling operation. FIG. 4 shows the operating state of the air conditioner 30 and changes in temperature when the ventilation amount of the ventilation device 20 is controlled by the control device 10. The control device 10 sets the ventilation amount of the ventilation device 20 to 0.7 times/h when the air conditioner 30 is thermo-on controlled. Then, when the air conditioner 30 is under thermo-off control, the control device 10 sets the ventilation amount of the ventilation device 20 to 0.3 times/h.

With this configuration, when the air conditioner 30 is under thermo-on control, more outside air is introduced into the air-conditioned room 1 than usual. Therefore, the temperature change of the air in the air-conditioned room 1 due to the cooling operation of the air conditioner 30 becomes gradual, and the time during which the air conditioner 30 is operated under thermo-on control becomes longer. On the other hand, when the air conditioner 30 is under thermo-off control, the amount of outside air introduced into the air-conditioned room 1 is smaller than usual. Therefore, even if the cooling operation by the air conditioner 30 is stopped, the temperature of the air in the air-conditioned room 1 is easily maintained, and the temperature change becomes gentle. This increases the time during which the air conditioner 30 is operated under thermo-off control. In other words, compared to the case where the ventilation device 20 shown in FIG. 3 is operated at the normal ventilation rate of 0.5 times/h, the control device 10 shown in FIG. When the operation is controlled, the cycle of thermo-on and thermo-off control becomes longer. In other words, the number of times the air conditioner 30 starts and stops per unit time is reduced.

FIG. 5 is a block diagram showing an example of the control device 10 according to the first embodiment. The control device 10 includes an air conditioning operating state detection unit 54 that acquires operating status information of the air conditioner 30 from the air conditioner 30, and a room temperature detection unit 55 that acquires temperature information of the air in the air conditioned room 1 from the room temperature detector 11 or the like. A communication section 53 is provided. The communication unit 53 is communicably connected to the room temperature detector 11, the ventilation control terminal 12, the air conditioning control terminal 13, and the external terminal 90, and acquires information from each unit and transmits information to each unit. The control device 10 also includes a storage section 52 that stores operating state information of the air conditioner 30, and a control section 51 that determines the amount of ventilation based on the operating state information of the air conditioner 30 and controls the ventilator 20.

The control unit 51 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU is also referred to as a central processing unit, central processing unit, processor, microprocessor, microcomputer, or DSP (Digital Signal Processor). In the control unit 51, the CPU reads programs and data stored in the ROM, and uses the RAM as a work area to centrally control the control device 10.

The storage unit 52 is, for example, a nonvolatile semiconductor memory such as a flash memory, an EPROM (Erasable Programmable ROM), or an EEPROM (Electrically Erasable Programmable ROM), and serves as a so-called secondary storage device. In the first embodiment, the storage unit 52 stores the operating state information of the air conditioner 30 acquired by the communication unit 53. Furthermore, the storage unit 52 stores room temperature information acquired by the communication unit 53. Furthermore, the storage unit 52 stores programs, data, and the like for communication between the control device 10 and each unit configuring the air environment adjustment system 100. Further, when the control device 10 directly controls the ventilation device 20, the storage unit 52 stores programs and data for controlling the ventilation device 20.

The communication unit 53 includes a communication interface for communicating with the room temperature detector 11 , the ventilation control terminal 12 , the air conditioning control terminal 13 , and the external terminal 90 .

The timer unit 56 is a timer device that includes, for example, an RTC (Real Time Clock) and performs timekeeping for thermo-on control and thermo-off control of the air conditioner 30.

FIG. 6 is an operation control flow of the ventilation device 20 by the control device 10 of FIG. 1. The flow of processing executed in the control device 10 of the air environment adjustment system 100 configured as described above will be explained with reference to the flowchart shown in FIG. 6.

At the start of control, the control device 10 acquires room temperature information (step A1). The room temperature information is the temperature of the air in the air-conditioned room 1 detected by the room temperature detector 11 or the temperature of the air detected by the temperature sensor 33 included in the indoor unit 31 of the air conditioner 30. Room temperature information is transmitted from at least one of the room temperature detector 11 and the air conditioning control terminal 13 to the communication unit 53 of the control device 10 . The room temperature information acquired by the communication unit 53 is processed by the control unit 51 and stored in the storage unit 52 as necessary.

The control device 10 acquires operating state information of the air conditioner 30 (step A2). The operating state information of the air conditioner 30 is at least the frequency of the compressor 41 included in the air conditioner 30. The operating state information of the air conditioner 30 is transmitted from the air conditioning control terminal 13 to the communication unit 53 of the control device 10. The operating state information of the air conditioner 30 acquired by the communication unit 53 is processed by the control unit 51 and stored in the storage unit 52 as necessary.

The control device 10 determines whether the air conditioner 30 is in a low capacity operating state (step A3). The control device 10 determines whether the air conditioner 30 is in a low capacity operating state based on the operating state information of the air conditioner 30 acquired in step A2. Here, the low capacity operating state refers to a state in which the air conditioner 30 is performing thermo-on control and thermo-off control. Note that the case where the air conditioner 30 is normally operated refers to a state where the air conditioner 30 is continuously operated at an output between the lowest output and the highest output of the air conditioner 30.

Whether or not the air conditioner 30 is in a low capacity operating state is determined based on the operating state information of the air conditioner 30 or the frequency pattern of the compressor 41 obtained by storing the operating state information of the air conditioner 30 of the air conditioner 30. be done. The determination of whether the air conditioner 30 of the control device 10 is in the low capacity operating state in step A3 will be described in detail later.

In step A3, if the air conditioner 30 is normally operated, the ventilation device 20 continues to operate with the normal ventilation rate (0.5 times/h). That is, in the case of No in step A3, the control is ended. If it is determined in step A3 that the air conditioner 30 is in a low capacity operating state, the control device 10 acquires operation history information of the air conditioner 30 (step A4). Specifically, the operation pattern of the compressor 41 of the air conditioner 30 stored in the storage unit 52 is acquired.

After step A4 is completed, the control device 10 determines the ventilation amount of the ventilation device 20 in each case of thermo-on control and thermo-off control of the air conditioner 30 (step A5).

The control device 10 controls the ventilation amount of the ventilation device 20 when the air conditioner 30 performs thermo-on control and thermo-off control. However, in the ventilation amount control, if the ventilation device 20 continues to have a low ventilation amount for a long time, it may not be possible to secure the ventilation amount necessary for the air-conditioned room 1. In the first embodiment, the ventilation amount required for the air-conditioned room 1 is 0.5 times/h. This is called the normal ventilation amount Q0. In other words, for example, when the ventilation rate of the ventilation device 20 is set to 0.3 times/h, if that ventilation rate continues for a long time, thermo-on control and thermo-off control of the air conditioner 30 are performed once each. The amount of ventilation per cycle of thermo-operation may be less than 0.5 times/h. In addition, when controlling the ventilation amount, if the ventilation amount of the ventilation device 20 continues for a long time, the cooling load of the air-conditioned room 1 increases due to ventilation, and the cooling capacity of the air conditioner 30 is increased. , the power consumption of the air conditioner 30 increases.

In order to solve the above problems, the control device 10 according to the first embodiment determines the thermo-on control time Δt1, which is the duration of thermo-on control, and the thermo-off control, which is the duration of thermo-off control, from the operation history information of the air conditioner 30. Read each time Δt2. The control device 10 sets the ventilation amount of the ventilation device 20 during thermo-on control to be larger than the normal ventilation amount Q0, and sets the ventilation amount of the ventilation device 20 during thermo-off control to be smaller than the normal ventilation amount Q0, while performing thermo-operation. The ventilation volume is controlled so that the average ventilation volume per cycle is equal to the normal ventilation volume Q0.

FIG. 7 is an example of an operation pattern of the compressor 41 of the air conditioner 30 in the air environment adjustment system 100 according to the first embodiment. As shown in FIG. 7, there are three types of thermo-operation patterns of the air conditioner 30. The first pattern is a case where the thermo-on control time Δt1 is longer than the thermo-off control time Δt2. The second pattern is a case where the thermo-on control time Δt1 is shorter than the thermo-off control time Δt2. The third pattern is a case where the thermo-on control time Δt1 and the thermo-off control time Δt2 are the same length. The control device 10 may determine that the first pattern and the second pattern apply, for example, when the difference between the thermo-on control time Δt1 and the thermo-off control time Δt2 is 1 minute or more. In that case, the control device 10 determines that the third pattern applies if the difference between the thermo-on control time Δt1 and the thermo-off control time Δt2 is within 1 minute. With this configuration, the control device 10 can clearly determine the thermo-operation pattern. How the control device 10 sets the ventilation amount of the ventilation device 20 in each pattern will be described in detail later.

Returning to FIG. 6, after step A5 is completed, the control device 10 stores the ventilation amount in each of the thermo-on control time Δt1 and the thermo-off control time Δt2, for example, in the storage unit 52. Then, the control device 10 determines from the operating state information of the air conditioner 30 that the air conditioner 30 is being operated under thermo-on control or thermo-off control, and transmits the ventilation amount according to the operating state to the ventilation control terminal 12. . The ventilation control terminal 12 controls the ventilation device 20 based on instructions from the control device 10 (step A6).

The control flow of the control device 10 shown in FIG. 6 repeats from start to end at a predetermined frequency while the air conditioner 30 of the air environment adjustment system 100 is operating. However, for example, if the user sets not to perform the control shown in FIG. , the control may be terminated and the repetition of the control flow may be stopped.

(Regarding determination of low capacity operating state of air conditioner 30)
FIG. 8 shows an example of operation history information of the air conditioner 30 of the air environment adjustment system 100 according to the first embodiment. Based on FIG. 8, the determination in step A3 in FIG. 6 will be explained. FIG. 8 is a diagram showing a temporal change in the frequency of the compressor 41 of the air conditioner 30. When cooling the air conditioner room 1, immediately after the air conditioner 30 starts operating, the air temperature in the air conditioner room 1 is higher than the target set temperature, so the air conditioner 30 maximizes its cooling capacity. be driven. At this time, the frequency of the compressor 41 is operated at the maximum value. When the temperature of the air-conditioned room 1 decreases and approaches the set temperature, the frequency of the compressor 41 is lowered in stages, and the compressor 41 is operated at the minimum operating frequency. When the room temperature reaches a predetermined temperature lower than the set temperature while the compressor 41 is being operated at the minimum operating frequency, the compressor 41 stops operating. After that, if there is no large change in the cooling load of the room 1 to be air-conditioned, the air conditioner 30 performs thermo-operation in which the compressor 41 is repeatedly turned on and off.

There are, for example, the following three methods by which the control device 10 determines the low capacity operating state of the air conditioner 30. In the first means, when the control device 10 detects that the frequency of the compressor 41 of the air conditioner 30 has reached the minimum value and the room temperature is within the range of the set temperature ±x degrees Celsius, the air conditioner 30 is determined to be in a low capacity operating state. At this time, the control device 10 acquires information on the set temperature, which is the target temperature of the air-conditioned room 1, and the frequency of the compressor 41 from the air conditioning control terminal 13 as operating state information. Further, the control device 10 acquires room temperature information from the room temperature detector 11. When the room temperature information from the room temperature detector 11 is within the range of ±x°C with respect to the set temperature from the air conditioning control terminal 13, the control device 10 determines that the room temperature is within the range of the set temperature ±x°C. . Note that the temperature of the temperature sensor 33 of the indoor unit 31 can be obtained from the air conditioning control terminal 13 and used as the room temperature information.

In the second means, when the control device 10 detects that the frequency of the compressor 41 of the air conditioner 30 is 0, it determines that the air conditioner 30 is in a low capacity operating state. At this time, the control device 10 acquires frequency information of the compressor 41 from the air conditioning control terminal 13 as operating state information of the air conditioner 30, and if the compressor 41 is stopped while the air conditioner 30 is in the operating state, It is determined that the vehicle is in a low-capacity operating state. Note that in the second means, the control device 10 does not use the room temperature information and the set temperature information, but determines whether the room temperature is within the range of the set temperature ±x degrees Celsius based on the room temperature information and the set temperature information. These judgments may be made at the same time. This improves the accuracy of determination.

In the third means, the control device 10 acquires operation history information of the compressor 41 of the air conditioner 30, and determines from the frequency pattern of the compressor 41 that the compressor 41 has been stopped and started at least once. In this case, it is determined that the air conditioner 30 is operating at low capacity. At this time, the control device 10 acquires the frequency pattern stored in the storage unit 52, and if the compressor 41 has been stopped and started at least once within a predetermined time period from the present time to the past, the control device 10 performs low-capacity operation. It is determined that the state is Note that room temperature information may be used in the third means as well, similarly to the first means and the second means. This improves the accuracy of the determination.

(Regarding setting of ventilation amount of ventilation device 20 by control device 10)
The ventilation amount setting of the ventilator 20 by the control device 10 in step A5 of FIG. 6 will be explained. First, the ventilation amount control of the control device 10 in the first pattern shown in FIG. 7 will be explained. In the first pattern, the thermo-on control time Δt1 is longer than the thermo-off control time Δt2. First, the control device 10 determines the first ventilation amount Q1 during the thermo-off control time Δt2. The first ventilation amount Q1 is set to a ventilation amount when the thermostat is off, which is smaller than the normal ventilation amount Q0 when the air conditioner 30 is normally operated, and is set to 0.3 times/h in the first embodiment. Then, the control device 10 calculates the first integrated ventilation amount V1 until entering the thermo-on control from the first ventilation amount Q1 and the thermo-off control time Δt2. The thermo-on control time Δt1 is known from driving history information. The ventilation amount Q at the thermo-on control time Δt1 such that the average ventilation amount is 0.5 times/h, which is the normal ventilation amount Q0, per cycle of the thermo-operation is determined from the following equation.
Q×Δt1+Q1×Δt2=Q0×(Δt1+Δt2)...(Formula 1)

The ventilation amount control by the control device 10 in the second pattern shown in FIG. 7 will be explained. In the second pattern, the thermo-on control time Δt1 is shorter than the thermo-off control time Δt2. First, the control device 10 determines the second ventilation amount Q2 during the thermo-on control time Δt1. The second ventilation amount Q2 is set to a thermo-on ventilation amount that is increased from the normal ventilation amount Q0 when the air conditioner 30 is normally operated, and is set to 0.7 times/h in the first embodiment. Then, the control device 10 calculates the second integrated ventilation amount V2 until entering the thermo-off control from the second ventilation amount Q2 and the thermo-on control time Δt1. The thermo-off control time Δt2 is known from the driving history information. The ventilation amount Q during the thermo-off control time Δt2 such that the average ventilation amount becomes the normal ventilation amount Q0 per cycle of the thermostat operation is determined from the following equation.
Q2×Δt1+Q×Δt2=Q0×(Δt1+Δt2)...(Formula 2)

Note that the first ventilation amount Q1 and the second ventilation amount Q2 in the first pattern and the second pattern are preset ventilation amounts. In the first embodiment, Q1 = 0.3 times/h and Q2 = 0.7 times/h, but this is just an example, and the performance of the air conditioner 30 and the insulation performance of the air conditioned room 1 It can be changed as appropriate depending on the conditions. However, the first ventilation amount Q1 is a ventilation amount when the thermostat is off, which is lower than the normal ventilation amount Q0, and the second ventilation amount Q2 is a ventilation amount when the thermostat is on, which is larger than the normal ventilation amount Q. That is, the first ventilation amount Q1 is set to 0≦Q1<0.5 times/h. The second ventilation amount Q2 is set to 0.5<Q2≦1 breath/h. Further, the thermo-on control time Δt1 may be referred to as a first period, and the thermo-off control time Δt2 may be referred to as a second period.

The ventilation amount control by the control device 10 in the third pattern shown in FIG. 7 will be explained. In the third pattern, the thermo-on control time Δt1 and the thermo-off control time Δt2 are the same length. In reality, the control device 10 treats the thermo-on control time Δt1 and the thermo-off control time Δt2 as having the same length when the difference in length is, for example, less than 1 minute.

In the third pattern, the control device 10 sets the first ventilation amount Q1 in the thermo-off control time Δt2 based on the thermo-on control and thermo-off control threshold settings acquired from the air conditioning control terminal 13. Note that the threshold values for the thermo-on control and thermo-off control may be determined based on the history of room temperature information that the control device 10 acquires from the room temperature detector 11 and stores in the storage unit 52. At this time, the control device 10 may also refer to the operation history information of the air conditioner 30.

FIG. 9 is a diagram showing the correlation between the ventilation amount of the ventilation device 20 and the threshold value for switching the thermo-operation of the air conditioner 30 in the third pattern of FIG. The control device 10 changes the first ventilation amount Q1 in the thermo-off control time Δt2 according to the threshold value for switching the thermo-operation of the air conditioner 30. Specifically, as shown in FIG. 9, if the width of the threshold value for switching the thermo-operation of the air conditioner 30 is less than the set temperature ±0.5°C, the first ventilation rate Q1 is set to 0.1 times/h. do. Further, when the width of the threshold value is greater than or equal to the set temperature ±0.5°C and less than ±1.0°C, the first ventilation amount Q1 is set to 0.2 times/h. Thereafter, the control device 10 sets the first ventilation amount Q1 to increase by 0.1 times/h each time the threshold width of the air conditioner 30 increases by ±0.5°C. However, the relationship between the width of the threshold value and the amount of increase in the first ventilation amount Q1 is not limited to that shown in FIG. 9, and for example, the relationship between the width of the threshold value and the first ventilation amount Q1 may be You can do it like this.

To set the ventilation amount of the ventilation device 20 in the third pattern, the control device 10 first determines the first ventilation amount Q1 at the thermo-off control time Δt2 of the air conditioner 30 based on FIG. In Embodiment 1, as shown in FIG. 4 etc., the thermo-operation switching threshold of the air conditioner 30 is set temperature ±0.5°C, so here, the first ventilation amount Q1 is set to 0.2 times/h. Set. Then, the control device 10 calculates the first integrated ventilation amount V1 until entering the thermo-on control from the first ventilation amount Q1 and the thermo-off control time Δt2. The thermo-on control time Δt1 is known from driving history information. The ventilation amount Q during the thermo-on control time Δt1 such that the average ventilation amount becomes the normal ventilation amount Q0 per cycle of thermo-operation is obtained from the above equation 1.

Further, when the control flow of the control device 10 shown in FIG. 6 is repeatedly performed, it is preferable to set the ventilation amount of the ventilation device 20 based on the most recent operation history. By setting the ventilation amount above, the ventilation amount in each case of thermo-on control and thermo-off control is changed, but the length of thermo-on control time Δt1 and thermo-off control time Δt2 changes with the change in ventilation amount. In some cases, any of the first pattern, second pattern, and third pattern described above may be changed to another pattern. Therefore, by repeating the control flow of the control device 10 shown in FIG. 6 and changing the ventilation amount of the ventilation device 20 based on the updated operation history, the average ventilation amount of the air-conditioned room 1 can be maintained more appropriately. It is possible to further suppress sagging and frequent fluctuations in room temperature. Further, even if the load in the air-conditioned room 1 fluctuates, it can be handled by repeating the control flow.

Through the control described above, the control device 10 and the air environment adjustment system 100 balance the load due to ventilation in the air-conditioned room 1 and room temperature fluctuations, suppress room temperature fluctuations, and turn on/off the compressor 41 of the air conditioner 30. The number of times can be reduced. Further, the ventilation device 20 is operated with different ventilation amounts set during thermo-on control and thermo-off control of the air conditioner 30, respectively. However, since the ventilation system 20 is set to ensure that the average ventilation volume in one cycle of thermo-operation of the air conditioner 30 is equal to the normal ventilation volume Q0, it is difficult to ensure the necessary ventilation volume of the air-conditioned room 1. I can do it. Furthermore, according to the control device 10 and the air environment adjustment system 100, the temperature fluctuation in the air-conditioned room 1 becomes gentler, so that the comfort of the air-conditioned room 1 can also be improved.

Further, in the above description, a case has been described in which the air conditioner 30 cools the room 1 to be air-conditioned, but similar control is performed also when the air conditioner 30 performs heating operation. In the case of heating operation, during thermo-off control of the air conditioner 30, the temperature of the air in the air-conditioned room 1 gradually decreases due to ventilation, and during thermo-on control, the heating capacity of the air conditioner 30 reduces the heating load of the air-conditioned room 1. As a result, the temperature will gradually rise.

Further, in the above embodiment, the control device 10 controls the control unit 51, the communication unit 53, the air conditioner operation state detection unit 54, and the room temperature detection unit 55 by the CPU executing the program stored in the ROM or the storage unit 52. , a ventilation amount calculation section 57, a ventilation amount determination section 58, and a ventilation operation control section 59, respectively. However, the control device 10 may be dedicated hardware. The dedicated hardware includes, for example, a single circuit, a composite circuit, a programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), a combination thereof, and the like. When the control device 10 is dedicated hardware, the functions of each part may be realized by separate hardware, or the functions of each part may be realized by a single piece of hardware.

Moreover, some of the functions of each part may be realized by dedicated hardware, and other parts may be realized by software or firmware. In this way, the control device 10 can realize each of the above functions using hardware, software, firmware, or a combination thereof.

By applying an operation program that defines the operation of the control device 10 to an existing computer such as a personal computer or an information terminal device, it is also possible to cause the computer to function as the control device 10. For example, the external terminal 90 shown in FIGS. 1 and 2 can also function as the control device 10.

The program that defines the operation of the control device 10 can be distributed in any manner, for example, on a computer readable computer such as a CD-ROM (Compact Disk ROM), a DVD (Digital Versatile Disk), an MO (Magneto Optical Disk), or a memory card. It may be stored in a recording medium and distributed, or it may be distributed via a communication network such as the Internet.

1 air-conditioned room, 10 control device, 11 room temperature detector, 12 ventilation control terminal, 13 air-conditioning control terminal, 20 ventilation device, 21 intake pipe, 21a suction port, 22 exhaust pipe, 22a exhaust port, 23 total heat exchange section, 24 Direct air introduction bypass, 25 Intake fan, 26 Exhaust fan, 27 Bypass fan, 29 Connection part, 29a Opening/closing part, 30 Air conditioner, 31 Indoor unit, 32 Outdoor unit, 33 Temperature sensor, 34 Temperature sensor, 35 Temperature sensor, 40 refrigeration cycle circuit, 41 compressor, 42 flow path switching device, 43 indoor heat exchanger, 44 expansion device, 45 outdoor heat exchanger, 47 indoor blower, 49 outdoor blower, 51 control section, 52 storage section, 53 communication section , 54 air conditioning operation state detection section, 55 room temperature detection section, 56 time measurement section, 57 ventilation amount calculation section, 58 ventilation amount determination section, 59 ventilation operation control section, 90 external terminal, 100 air environment adjustment system, Q ventilation amount, Q0 Normal ventilation amount, Q1 first ventilation amount, Q2 second ventilation amount, V1 first integrated ventilation amount, V2 second integrated ventilation amount, Δt1 thermo-on control time, Δt2 thermo-off control time.

Claims (16)

A control device that controls the operation of a ventilation device that ventilates air in an air-conditioned room whose room temperature is adjusted by an air conditioner that performs thermo-on control and thermo-off control in a low capacity operating state,
Obtaining operating status information of the air conditioner;
storing the operating state information as operating history information of the air conditioner;
When the air conditioner is in the low capacity operation state and the operation state information is the thermo-off control, the ventilation amount of the ventilation device is set to the normal amount when the air conditioner is normally operated. The ventilation volume when the thermostat is off is reduced compared to the ventilation volume,
When the air conditioner is in the low capacity operation state and the operation state information is the thermo-on control, thermo-on ventilation in which the ventilation amount of the ventilation device is increased than the normal ventilation amount. Quantity, control device. The operating state information is
is the frequency of a compressor included in the air conditioner,
The control device according to claim 1, wherein the control device determines that the low-capacity driving state is based on the driving history information that is a history of fluctuations in the frequency. obtaining the room temperature of the air-conditioned room;
obtaining the set temperature of the air conditioner;
The control device according to claim 2, wherein the control device determines that the air conditioner is in the low capacity operation state when a difference between the room temperature and the set temperature is within a predetermined range. When the first period, which is the time during which the thermo-on control is performed in the driving history information, is longer than the second period, which is the time during which the thermo-off control is performed,
A first cumulative ventilation amount when the thermo-off ventilation amount is fixed at a first ventilation amount that is lower than the normal ventilation amount, and the ventilation device is operated at the first ventilation amount during the second period. Calculate,
Claims 1 to 3, wherein the ventilation amount during thermo-on is determined so that the average ventilation amount per unit time in one cycle of thermo-operation including the first period and the second period is the same as the normal ventilation amount. The control device according to any one of the above. When the first period, which is the time during which the thermo-on control is performed in the driving history information, is shorter than the second period, which is the time during which the thermo-off control is performed,
A second integrated ventilation amount when the thermo-on ventilation amount is fixed at a second ventilation amount that is increased than the normal ventilation amount, and the ventilation device is operated at the second ventilation amount during the first period. Calculate,
Claims 1 to 3, wherein the ventilation amount when the thermostat is off is determined so that the average ventilation amount per unit time in one cycle of the thermostat operation, which is a combination of the first period and the second period, is the same as the normal ventilation amount. The control device according to any one of the above. When the first period, which is the time during which the thermo-on control is performed, and the second period, which is the time during which the thermo-off control is performed, in the driving history information, the length is the same,
setting the thermo-off ventilation amount to a first ventilation amount that is lower than the normal ventilation amount according to the width of a temperature threshold for switching between the thermo-on control and the thermo-off control of the air conditioner;
Calculating a first cumulative ventilation amount when the ventilation device is operated at the first ventilation amount during the first period,
Claims 1 to 3, wherein the ventilation amount during thermo-on is determined so that the average ventilation amount per unit time in one cycle of thermo-operation including the first period and the second period is the same as the normal ventilation amount. The control device according to any one of the above. The control device according to any one of claims 1 to 6,
An air environment conditioning system comprising: the ventilation device. The control device according to any one of claims 1 to 6,
the ventilation device;
An air environment adjustment system comprising the air conditioner. A method for adjusting the air environment in an air-conditioned room in which the room temperature is adjusted by an air conditioner that performs thermo-on control and thermo-off control in a low capacity operating state, the method comprising:
Obtaining operating status information of the air conditioner;
storing the operating state information as operating history information of the air conditioner;
When the air conditioner is in the low capacity operation state,
When the operating state information is the thermo-off control , the ventilation amount is set to a thermo-off ventilation amount that is lower than the normal ventilation amount when the air conditioner is normally operated;
When the air conditioner is in the low capacity operating state and the operating state information is the thermo-on control , the ventilation amount is set to a thermo-on ventilation amount that is increased from the normal ventilation amount. Air environment adjustment method. The operating state information is
is the frequency of a compressor included in the air conditioner,
The air environment adjustment method according to claim 9, wherein the low capacity operation state is determined based on the operation history information that is a history of the frequency fluctuations. obtaining the room temperature of the air-conditioned room;
obtaining the set temperature of the air conditioner;
The air environment adjustment method according to claim 10, wherein the air conditioner is determined to be in the low capacity operation state when the difference between the room temperature and the set temperature is within a predetermined range. When the first period, which is the time during which the thermo-on control is performed in the driving history information, is longer than the second period, which is the time during which the thermo-off control is performed,
Calculating a first cumulative ventilation amount when the thermo-off ventilation amount is fixed at a first ventilation amount that is lower than the normal ventilation amount, and ventilation is performed at the first ventilation amount during the second period;
Claims 9 to 11, wherein the ventilation amount during thermo-on is determined so that the average ventilation amount per unit time in one cycle of thermo-operation including the first period and the second period is the same as the normal ventilation amount. The air environment adjustment method according to any one of the above. When the first period, which is the time during which the thermo-on control is performed in the driving history information, is shorter than the second period, which is the time during which the thermo-off control is performed,
Calculating a second integrated ventilation amount when the thermo-on ventilation amount is fixed at a second ventilation amount that is increased than the normal ventilation amount, and ventilation is performed at the second ventilation amount during the first period,
Claims 9 to 11, wherein the ventilation amount when the thermostat is off is determined so that the average ventilation amount per unit time in one cycle of the thermostat operation including the first period and the second period is the same as the normal ventilation amount. The air environment adjustment method according to any one of the above. When the first period, which is the time during which the thermo-on control is performed, and the second period, which is the time during which the thermo-off control is performed, in the driving history information, the length is the same,
Setting a first ventilation amount in which the thermo-off ventilation amount is smaller than the normal ventilation amount, depending on the width of a temperature threshold for switching between the thermo-on control and the thermo-off control of the air conditioner;
Calculating a first cumulative ventilation amount when ventilation is performed at the first ventilation amount during the second period,
Claims 9 to 11, wherein the ventilation amount during thermo-on is determined so that the average ventilation amount per unit time in one cycle of thermo-operation including the first period and the second period is the same as the normal ventilation amount. The air environment adjustment method according to any one of the above. In an air-conditioned room where the room temperature is adjusted by an air conditioner that performs thermo-on control and thermo-off control in a low capacity operating state, a computer that controls the operation of a ventilation device that ventilates the air in the air-conditioned room,
Obtaining operating status information of the air conditioner;
storing the operating state information as operating history information of the air conditioner;
When the air conditioner is in the low capacity operation state and the operation state information is the thermo-off control, the ventilation amount of the ventilation device is set to normal ventilation when the air conditioner is normally operated. The ventilation volume when the thermostat is off is set as the ventilation volume when the thermostat is turned off.
When the air conditioner is in the low-capacity operating state and the operating state information is the thermo-on control, the ventilation amount at thermo-on is increased by increasing the ventilation amount of the ventilation device from the normal ventilation amount. A program that functions as a means to do so. A computer-readable recording medium on which the program according to claim 15 is recorded.

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