Air conditioning device

Abstract

To provide an air conditioner in one of the embodiments, capable of suppressing the rise / fall of an indoor temperature while extending an operation time before thermo-off, that is, stopping the supply of cold / hot heat into a room, to the utmost extent.SOLUTION: When airflow-increasing predicted dissipation power Pw2 is smaller than thermo-off predicted dissipation power Pw1, an integrated control part 10 gives a command to a control part 16 which transmits a stop condition establishment signal, to execute airflow increase control without executing thermo-off control. Thus, an air conditioner 1 can suppress the rise / fall of an interior temperature while extending an operation time before thermo-off, that is, stopping the supply of cold / hot heat into the room, to the utmost extent.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to air conditioning systems. [Background technology]

[0002] For example, Patent Document 1 describes an air conditioner that grasps the operating conditions of a plurality of compressors and controls the on / off and operating capacity of each compressor accordingly. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-145275 A Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present application is to disclose an example of an air conditioner that can suppress fluctuations in indoor temperature while extending as long as possible the operating time until thermo-off, i.e., the supply of cold or hot heat to the room is stopped. [Means for solving the problem]

[0005] It is desirable for the air conditioner to have at least one of the following constituent features, for example: The first feature is that the air conditioner has a plurality of heat exchangers (15) for cooling or heating air to be supplied into a room, a plurality of fans (15A) for blowing the air cooled or heated by each of the plurality of heat exchangers (15) into the room, a plurality of temperature sensors (17A, 17B) for detecting the temperature of the air before being cooled or heated by each of the plurality of heat exchangers (15) or the temperature of the air after being cooled or heated by the heat exchanger (15), and at least one controller (10, 16) for controlling the cold or hot heat generated by each of the plurality of heat exchangers (15) and the plurality of fans (15A).

[0006] The second requirement is that, when a stop condition is satisfied in any of the plurality of air conditioners (11) and the predicted power consumption during increased air volume (Pw2) is smaller than the predicted power consumption during thermo-off (Pw1), the control unit (10, 16) executes increased air volume control without executing thermo-off control for the air conditioner (11) for which the stop condition is satisfied.

[0007] The air conditioner (11) refers to a combination of the heat exchanger (15), the temperature sensors (17A, 17B) corresponding to the heat exchanger (15), and the blower (15A) corresponding to the heat exchanger (15).

[0008] The control unit (10, 16) utilizes the detected temperature of the temperature sensor (17A, 17B) corresponding to the heat exchanger (15) to control the cold or hot heat generated in the heat exchanger (15), and is also capable of executing a thermo-off control, an air volume increase control, and a power consumption prediction function.

[0009] The thermo-off control is executed at least when the detected temperature satisfies a predetermined temperature condition, and is a control that stops the generation of cold or hot heat, while the air volume increase control is a control that increases the air volume compared to before the air volume increase control was executed, regardless of the detected temperature.

[0010] The power consumption prediction function is executed when the necessary conditions for executing thermo-off control (hereinafter referred to as the stop conditions) are met, and predicts the total power consumption when thermo-off control is executed without increasing airflow control (hereinafter referred to as the predicted power consumption when thermo-off is executed (Pw1)), and the total power consumption when increasing airflow control is executed without executing thermo-off control (hereinafter referred to as the predicted power consumption when increasing airflow (Pw2)).

[0011] This makes it possible for the air conditioner to suppress fluctuations in the indoor temperature while extending as long as possible the operating time until the thermostat is turned off, that is, until the supply of cold or hot heat to the room is stopped.

[0012] Incidentally, the symbols in the above parentheses are examples showing the corresponding relationship with the specific configurations etc. described in the embodiments described below, and the present disclosure is not limited to the specific configurations etc. shown by the symbols in the above parentheses. [Brief description of the drawings]

[0013] [Figure 1] 1 is a diagram showing an air conditioner according to a first embodiment. [Diagram 2] 3 is a flowchart showing the operation of the air conditioner according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The following "embodiment of the invention" shows an example of an embodiment that falls within the technical scope of the present disclosure. In other words, the invention-specific matters described in the claims are not limited to the specific configurations and structures shown in the following embodiment.

[0015] At least one of each of the components or parts described with a reference number is provided, unless otherwise specified by "one". In other words, unless otherwise specified by "one", two or more of the components may be provided. The air conditioner shown in this disclosure includes at least the components described with a reference number, as well as the structural elements shown in the drawings.

[0016] (First embodiment) <1. Overview of air conditioning equipment> In this embodiment, an example of an air conditioner according to the present disclosure is applied to an air conditioner that conditions air in a server room such as a data center or a communication equipment room. As shown in FIG. 1, the air conditioner 1 is configured to include a plurality of air conditioners 11 and an integrated control unit 10.

[0017] Each air conditioner 11 is a so-called "package air conditioner" configured as a vapor compression refrigeration machine. Each of the multiple air conditioners 11 according to this embodiment is a vapor compression refrigeration machine with the same configuration and specifications.

[0018] Each air conditioner 11 generates cold heat or hot heat (cold heat in this embodiment) for air conditioning the server room. The air conditioner 11 includes a compressor 12, a condenser 13, an expansion valve 14, an evaporator 15, a control unit 16, a first temperature sensor 17A to a fourth temperature sensor 17D, a first pressure sensor 17E, and the like.

[0019] The compressor 12 compresses a low-pressure gas-phase refrigerant and supplies it to the condenser 13. The compressor 12 is driven by an electric motor (not shown). The electric motor is driven by an inverter-type drive circuit (not shown). The operation of the drive circuit is controlled by the control unit 16.

[0020] That is, the drive circuit supplies a drive current to the electric motor and is capable of changing the frequency of the drive current (hereinafter referred to as the drive frequency), and the drive circuit supplies the electric motor with a drive current having a drive frequency corresponding to a command frequency from the control unit 16. That is, the operation of the compressor 12 is controlled by the control unit 16 via the drive circuit.

[0021] The condenser 13 is a high-pressure side heat exchanger that cools the high-pressure refrigerant compressed by the compressor 12. In the condenser 13, the gas-phase refrigerant is cooled and liquefied (condensed). The expansion valve 14 reduces the pressure and expands the high-pressure refrigerant flowing out from the condenser 13, and supplies it to the evaporator 15.

[0022] The evaporator 15 generates cold heat by evaporating the low-pressure refrigerant in liquid phase. The first fan 3A blows cooling air to the condenser 13. The second fan 5A generates an airflow that passes through the evaporator 15 and is supplied into the server room.

[0023] The control unit 16 controls at least the opening degree and the like of the compressor 12, the second blower 5A, and the expansion valve 14. That is, the control unit 16 constitutes a capacity control unit that controls the rotation speed of the compressor 2, and a fan control unit that controls the air volume of the second blower 5A.

[0024] The control unit 16 is configured with a microcomputer having a CPU, a ROM, a RAM, etc. The capacity control unit, the fan control unit, etc. are realized by the CPU executing software stored in a non-volatile storage unit such as a ROM.

[0025] Detection signals from a first temperature sensor 17A to a fourth temperature sensor 17D and a first pressure sensor 17E are input to the control unit 16. The first temperature sensor 17A detects the temperature of the air before it is cooled by the evaporator 15.

[0026] The second temperature sensor 17B detects the temperature of the air after being cooled by the evaporator 15. The third temperature sensor 17C detects the refrigerant temperature at the refrigerant outlet of the evaporator 15. The fourth temperature sensor 17D detects the refrigerant temperature at the refrigerant inlet of the evaporator 15. The first pressure sensor 17E detects the refrigerant pressure in the evaporator 15.

[0027] <2. Air conditioner control operation> <2.1 Control operation of each air conditioner> <Expansion valve control> Each control unit 16 controls the opening degree of the expansion valve 14 so that the degree of superheat of the refrigerant at the refrigerant outlet of the evaporator 15 becomes a predetermined degree of superheat. Each control unit 16 grasps the temperature difference between the temperature detected by the third temperature sensor 17C and the evaporation temperature calculated from the pressure detected by the first pressure sensor 17E as the degree of superheat.

[0028] <Compressor control> Each capacity control section, i.e., each control section 16, can control the compressor 12 with suction priority control or refrigeration capacity off control. With suction priority control, the refrigeration capacity generated by the evaporator 15 is controlled. With suction priority control, the compressor 12 is stopped.

[0029] <Suction priority control> In suction priority control, the control unit 16 controls the rotation speed of the compressor 12 so that the temperature detected by the first temperature sensor 17A (hereinafter, in this embodiment, referred to as the suction temperature) becomes a predetermined temperature (hereinafter, referred to as the suction set temperature).

[0030] Specifically, when the suction temperature is higher than the suction set temperature, the control unit 16 increases the rotation speed of the compressor 12. When the suction temperature is lower than the suction set temperature, the control unit 16 decreases the rotation speed of the compressor 12.

[0031] <Thermo-off control> In the thermo-off control, the control unit 16 stops the compressor 12 when a state in which a predetermined condition (hereinafter, referred to as a stop condition) is satisfied exceeds a predetermined time. In other words, the stop condition is a necessary condition for executing the thermo-off control.

[0032] The stop condition in this embodiment refers to a state in which the temperature condition is satisfied such that the suction temperature is below a predetermined temperature (hereinafter referred to as the thermo-off threshold) and the rotation speed of the compressor 12 is below a predetermined rotation speed (hereinafter referred to as the lower limit rotation speed).

[0033] The control unit 16 according to the present embodiment grasps the "rotation speed of the compressor 12" from the drive frequency. Therefore, the control unit 16 stops the compressor 12 when the suction temperature drops to or below the thermo-off threshold and the drive frequency remains below the frequency corresponding to the rotation speed (hereinafter referred to as the minimum frequency) for a predetermined period of time.

[0034] <Control of the second fan> The fan control unit, i.e., the control unit 16, can control the second blower 5A in normal control or air volume increase control. The normal control is executed at least when the suction priority control is executed. The capacity control unit and the fan control unit operate independently and in parallel with each other.

[0035] <Normal control> Control unit 16 controls the air volume of second fan 5A so that the temperature detected by second temperature sensor 17B (hereinafter referred to as blowing temperature) becomes a preset temperature (hereinafter referred to as blowing / suction setting temperature).

[0036] Specifically, when the blowing temperature is higher than the blowing / suction set temperature, the control unit 16 decreases the command speed to the second blower 5A, and when the blowing temperature is lower than the blowing / suction set temperature, the control unit 16 increases the command speed. The blowing / suction set temperature is a temperature obtained by adding a predetermined value to the suction set temperature.

[0037] <Air volume increase control> The airflow increase control according to this embodiment is a control for increasing the airflow rate compared to before the airflow increase control is executed, regardless of the blowing temperature. Note that in this embodiment, when the airflow increase control is executed, the blowing / suction set temperature is changed to a lower temperature (hereinafter referred to as the increased set temperature) compared to before the airflow increase control is executed only during the airflow increase control.

[0038] For this reason, if the amount of heat generated in the server room (hereinafter referred to as the thermal load) fluctuates from the time the airflow increase control is started, the control unit 16 may set the airflow to a smaller volume than the airflow immediately before the airflow increase control was started in order to maintain the blowing temperature at the increased set temperature.

[0039] In other words, the air volume increase control has a first air volume increase control period during which the air volume is greater than the air volume immediately before the air volume increase control is started, and a second air volume increase control period following the first air volume increase control period, i.e., a period during which the air volume changes so that the blowing temperature becomes the increased set temperature.

[0040] <2.2 Timing of Execution of Air Flow Increase Control> When each control unit 16 receives an execution permission signal, it executes airflow increase control without executing thermo-off control. When each control unit 16 does not receive an execution permission signal, it executes normal control and thermo-off control without executing airflow increase control.

[0041] That is, when a stop condition is satisfied, each control unit 16 transmits a signal to that effect (hereinafter, referred to as a stop condition satisfaction signal) to the power consumption prediction unit 10A of the integrated control unit 10. Upon receiving the stop condition satisfaction signal, the power consumption prediction unit 10A executes a power consumption prediction function.

[0042] The integrated control unit 10 is configured with a microcomputer having a CPU, a ROM, a RAM, etc., and is capable of communicating with each control unit 16. The power consumption prediction unit 10A and the like are realized by the CPU executing software stored in a non-volatile storage unit such as a ROM.

[0043] The power consumption prediction unit 10A, that is, the integrated control unit 10, calculates and predicts a predicted power consumption Pw1 when the thermo is off and a predicted power consumption Pw2 when the air volume is increased.

[0044] The predicted power consumption Pw1 when the thermostat is off refers to the total power consumption when the thermostat is off and the airflow increase control is not executed. The predicted power consumption Pw2 when the airflow increase control is executed and the thermostat is off.

[0045] When the predicted power consumption Pw2 during increased airflow is smaller than the predicted power consumption Pw1 during thermo-off, the integrated control unit 10 transmits an execution permission signal to the control unit 16 that transmitted the stop condition establishment signal.

[0046] In addition, when the predicted power consumption Pw2 when the air volume is increased is not smaller than the predicted power consumption Pw1 when the thermo is off, the integrated control unit 10 sends an execution non-permission signal to the control unit 16 that sent the stop condition establishment signal without sending an execution permission signal.

[0047] In other words, if the integrated control unit 10 predicts that the execution of the air volume increase control will result in a reduction in power consumption (hereinafter referred to as an energy saving effect), it allows the execution of the air volume increase control, and if it predicts that no energy saving effect will occur, it does not allow the execution of the air volume increase control.

[0048] Then, when the total power consumption after a predetermined time has elapsed since the start of the air volume increase control is equal to or greater than the power consumption before the air volume increase Pw3, the integrated control unit 10 sends a signal to the control unit 16 that sent the execution non-permission signal instructing it to stop the air volume increase control and execute thermo-off control.

[0049] The power consumption Pw3 before airflow increase refers to the total power consumption before airflow increase control is executed. The total power consumption refers to the power consumption of each air conditioner 11 (particularly the compressor 12).

[0050] In other words, after the integrated control unit 10 assumes that an energy saving effect will occur and issues a command to execute air volume increase control, it verifies whether or not the energy saving effect has actually occurred, and if the energy saving effect has not actually occurred, it stops the air volume increase control and executes thermo-off control.

[0051] <Details of energy saving effect forecast> When the stop condition is met in any of the multiple air conditioners 11 and there is a compressor that has not yet been stopped among one or more non-target compressors 12, the integrated control unit 10 determines that an energy saving effect will be achieved for the target air conditioner and permits the execution of air volume increase control.

[0052] In other words, when there is a compressor that has not been stopped among one or more non-target compressors 12, the integrated control unit 10 determines that the predicted power consumption Pw2 during increased air volume is smaller than the predicted power consumption Pw1 during thermo-off, and sends an execution permission signal.

[0053] The target air conditioner refers to an air conditioner for which the stop condition is satisfied among the multiple air conditioners 11. The non-target compressor refers to a compressor corresponding to an air conditioner for which the stop condition is not satisfied among the multiple air conditioners 11. The pre-stop compressor refers to a compressor that is operating at or above a predetermined rotation speed that is higher than the lower limit rotation speed.

[0054] <See example of air conditioner operation (Figure 2)> Fig. 2 is a flowchart showing an example of the operation of the air conditioner 1. The control shown in Fig. 2 starts simultaneously with the start of the compressor 12, and stops together with the stop of the compressor 12. Hereinafter, each control unit 16 and the integrated control unit 10 will be collectively referred to as the "control unit".

[0055] When the control is started, the control unit controls the second fan 5A in a normal control mode and controls the compressor 12 in a suction priority control mode (S1). Hereinafter, these controls are simply referred to as "normal control." Next, the control unit determines whether or not a stop condition is satisfied (S2).

[0056] If the stop condition is not met (S2: NO), the control unit continues normal control (S1). If the stop condition is met (S1: YES), the control unit calculates and predicts whether or not there is an energy saving effect (S3).

[0057] If it is determined that there is an energy saving effect (S3: YES), the control unit executes the air volume increase control (S4). If it is determined that there is no energy saving effect (S3: NO), the control unit executes the thermo-off control.

[0058] Then, after the air volume increase control has been executed, the control unit determines whether or not the compressor rotation speed (capacity) of air conditioners other than the air conditioner for which the air volume increase control has been executed has decreased, i.e., whether or not an energy saving effect has actually been achieved (S5).

[0059] If the energy saving effect is actually occurring (S5: YES), the control unit executes S3 again. If the energy saving effect is not actually occurring (S5: NO), the control unit executes the thermo-off control.

[0060] 3. Features of the Air Conditioner According to the Present Invention (See FIG. 3) When the predicted power consumption Pw2 during increased airflow is smaller than the predicted power consumption Pw1 during thermo-off, the integrated control unit 10 instructs the control unit 16, which sent the stop condition establishment signal, to execute increased airflow control without executing thermo-off control.

[0061] This makes it possible for the air conditioner 1 to suppress fluctuations in the indoor temperature while extending as long as possible the operation time until thermo-off, that is, until the supply of cold or hot heat to the room is stopped.

[0062] When the integrated control unit 10 determines that the energy saving effect is not actually occurring after instructing the execution of the air volume increase control assuming that the energy saving effect is occurring, the integrated control unit 10 stops the air volume increase control and executes the thermo-off control, thereby suppressing an increase in the total power consumption.

[0063] (Other embodiments) In the above embodiment, the description focuses on the cooling operation. However, the present disclosure is not limited to this. That is, the present disclosure is also applicable to the heating operation. In this case, the target heat exchanger is the condenser 3, and the target fan is the first fan 3A.

[0064] The air conditioner according to the above embodiment is a so-called "package air conditioner" configured with a vapor compression refrigeration machine. However, the present disclosure is not limited to this. That is, the present disclosure is also applicable to an air conditioner that performs cooling or heating by circulating cold water or hot water through a heat exchanger, for example.

[0065] The capacity control unit of the air conditioner controls the amount of cold or hot heat generated in the heat exchanger by controlling the flow rate of cold or hot water circulated through the heat exchanger. Specifically, the capacity control unit controls the amount of cold or hot heat generated in the heat exchanger by controlling the opening degree of a flow control valve.

[0066] In the air conditioner 1 according to the embodiment described above, the compressor 12 is controlled so that the suction temperature becomes the suction set temperature, and the second fan 15A is controlled so that the blowing temperature becomes the blowing set temperature.

[0067] However, the present disclosure is not limited to this. That is, the present disclosure may be configured such that, for example, compressor 12 is controlled so that the blowing temperature becomes the blowing set temperature, and the air volume of second blower 15A is controlled in conjunction with the drive frequency of compressor 12.

[0068] Specifically, the second blower 15A in this configuration is controlled so that the air volume increases in conjunction with an increase in the rotation speed of the compressor 12, and decreases in conjunction with a decrease in the rotation speed of the compressor 2.

[0069] In the air conditioner 1 according to the embodiment described above, the outlet / intake set temperature is changed to the increased set temperature only during the airflow increase control. However, the present disclosure is not limited to this. That is, the disclosure may be, for example, an airflow obtained by adding a predetermined amount to the airflow immediately before the start of the airflow increase control until a predetermined time has elapsed from the start of the airflow increase control.

[0070] In the air conditioner 1 according to the embodiment described above, the control unit 16 and the integrated control unit 10 communicate with each other to cooperate and execute the above-mentioned control. However, the present disclosure is not limited to this. That is, the disclosure may be, for example, a configuration in which everything is controlled only by the integrated control unit 10, or a configuration in which the integrated control unit 10 is eliminated and each control unit 16 also executes the power consumption prediction function.

[0071] Furthermore, the present disclosure is not limited to the above-mentioned embodiments as long as it is consistent with the gist of the disclosure described in the above-mentioned embodiments. Therefore, the present disclosure may be a configuration in which at least two of the above-mentioned embodiments are combined, or a configuration in which any of the components illustrated or the components described with reference numerals in the above-mentioned embodiments are eliminated. [Explanation of symbols]

[0072] 1... Air conditioner 10... Integrated control unit 11... Air conditioner 12... Compressor 13... Condenser 14... Expansion valve 15... Evaporator 16... Control unit

Claims

1. A plurality of heat exchangers for cooling or heating air to be supplied to the room; A plurality of fans for blowing the air cooled or heated by each of the plurality of heat exchangers into a room; A plurality of temperature sensors that detect the temperature of air before being cooled or heated by each of the plurality of heat exchangers, or the temperature of air after being cooled or heated by the heat exchangers; At least one control unit that controls the cold or hot heat generated in each of the plurality of heat exchangers and the plurality of blowers; The control unit is capable of controlling the cold or hot heat generated in the heat exchanger by utilizing the detected temperature of the temperature sensor corresponding to the heat exchanger, and of executing a thermo-off control, an air volume increase control, and a power consumption prediction function; The thermo-off control is a control that is executed at least when the detected temperature satisfies a predetermined temperature condition, and is a control that stops the generation of cold or hot heat, the airflow rate increase control is a control for increasing an airflow rate compared to before the airflow rate increase control is executed, regardless of the detected temperature; The power consumption prediction function is a function that is executed when a necessary condition for executing the thermo-off control (hereinafter referred to as a stop condition) is satisfied, and is a function that predicts the total power consumption in the case where the thermo-off control is executed without the air volume increase control being executed (hereinafter referred to as a predicted power consumption during thermo-off), and the total power consumption in the case where the air volume increase control is executed without the thermo-off control being executed (hereinafter referred to as a predicted power consumption during air volume increase), When a combination of the heat exchanger, the temperature sensor corresponding to the heat exchanger, and the blower corresponding to the heat exchanger is an air conditioner, When the stop condition is met in any one of the plurality of air conditioners and the predicted power consumption during increased air volume is smaller than the predicted power consumption during thermo-off, the control unit executes the increased air volume control for the air conditioner for which the stop condition is met without executing the thermo-off control.

2. 2. The air conditioning device according to claim 1, wherein when the stop condition is met and the predicted power consumption when the thermo is off is smaller than the predicted power consumption when the air volume is increased, the control unit executes the thermo-off control for the air conditioner for which the stop condition is satisfied, without executing the air volume increase control.

3. A plurality of heat exchangers that use the cold or hot heat generated by the vapor compression refrigerator to cool or heat air to be supplied to a room; A plurality of fans for blowing the air cooled or heated by each of the plurality of heat exchangers into a room; A plurality of temperature sensors that detect the temperature of air before being cooled or heated by each of the plurality of heat exchangers, or the temperature of air after being cooled or heated by the heat exchangers; At least one control unit that controls the cold or hot heat generated in each of the plurality of heat exchangers and the plurality of blowers; The control unit is capable of controlling the cold or hot heat generated in the heat exchanger by utilizing the detected temperature of the temperature sensor corresponding to the heat exchanger, and of executing a thermo-off control and an airflow increase control; The thermo-off control is performed when the detected temperature satisfies a predetermined temperature condition and the rotation speed of the compressor is a predetermined rotation speed (hereinafter, referred to as a lower limit rotation speed). ) or less (hereinafter referred to as a stop condition) is satisfied and the state in which the stop condition is satisfied continues for a predetermined time or more, the airflow rate increase control is a control for increasing an airflow rate compared to before the airflow rate increase control is executed, regardless of the detected temperature; When a combination of the heat exchanger, the temperature sensor corresponding to the heat exchanger, and the blower corresponding to the heat exchanger is defined as an air conditioner, an air conditioner for which the stop condition is satisfied among the plurality of air conditioners is defined as a target air conditioner, a compressor corresponding to an air conditioner for which the stop condition is not satisfied among the plurality of air conditioners is defined as a non-target compressor, and a compressor operating at or above a predetermined rotation speed that is higher than the lower limit rotation speed is defined as a pre-stop compressor, When the stop condition is satisfied in any one of the plurality of air conditioners and a pre-stop compressor is present among one or more of the non-target compressors, the control unit executes the air volume increase control for the target air conditioner without executing the thermo-off control.

4. When the total power consumption before the airflow increase control is executed is defined as the power consumption before the airflow increase control, 4. The air conditioning device according to claim 1, wherein when a total power consumption when a predetermined time has elapsed since the start of the air volume increase control is equal to or greater than the power consumption before the air volume increase control, the control unit is capable of stopping the air volume increase control and executing the thermo-off control.

5. A plurality of heat exchangers for cooling or heating air to be supplied to the room; A plurality of fans for blowing the air cooled or heated by each of the plurality of heat exchangers into a room; and a plurality of temperature sensors for detecting the temperature of air before being cooled or heated by each of the plurality of heat exchangers, or the temperature of air after being cooled or heated by the heat exchangers, a combination of the heat exchanger, the temperature sensor corresponding to the heat exchanger, and the blower corresponding to the heat exchanger is defined as an air conditioner; An air conditioning control program incorporated in at least one control unit that controls the cold or hot heat generated in each of the plurality of heat exchangers and the plurality of fans, A function of controlling the cold or hot heat generated in the heat exchanger by utilizing the detected temperature of the temperature sensor corresponding to the heat exchanger; a thermo-off control function that stops the generation of cold or hot heat, which is a control that is executed at least when the detected temperature satisfies a predetermined temperature condition; an airflow increase control function for increasing the airflow rate regardless of the detected temperature; A power consumption prediction function which is executed when a necessary condition for executing the thermo-off control (hereinafter referred to as a stop condition) is satisfied and which predicts the total power consumption in the case where the thermo-off control is executed without the air volume increase control being executed (hereinafter referred to as a predicted power consumption during thermo-off), and the total power consumption in the case where the air volume increase control is executed without the thermo-off control being executed (hereinafter referred to as a predicted power consumption during air volume increase), and An air conditioning control program that realizes the function of executing the air volume increase control without executing the thermo-off control for the air conditioner for which the stop condition is met, when the stop condition is met in any of the multiple air conditioners and the predicted power consumption during increased air volume is smaller than the predicted power consumption during thermo-off.

6. A plurality of heat exchangers that use the cold or hot heat generated by the vapor compression refrigerator to cool or heat air to be supplied to a room; A plurality of fans for blowing the air cooled or heated by each of the plurality of heat exchangers into a room; and a plurality of temperature sensors for detecting the temperature of air before being cooled or heated by each of the plurality of heat exchangers, or the temperature of air after being cooled or heated by the heat exchangers, An air conditioning control program incorporated in at least one control unit that controls the cold or hot heat generated in each of the plurality of heat exchangers and the plurality of fans, A function of controlling the cold or hot heat generated in the heat exchanger by utilizing the detected temperature of the temperature sensor corresponding to the heat exchanger; The detected temperature satisfies a predetermined temperature condition and the rotation speed of the compressor is a predetermined rotation speed (hereinafter referred to as a lower limit rotation speed). a thermo-off control function for stopping the compressor when a condition (hereinafter referred to as a stop condition) is satisfied and the satisfied state of the stop condition continues for a predetermined time or longer; An airflow increase control function that increases the airflow regardless of the detected temperature; and When a combination of the heat exchanger, the temperature sensor corresponding to the heat exchanger, and the blower corresponding to the heat exchanger is defined as an air conditioner, an air conditioner for which the stop condition is satisfied among the plurality of air conditioners is defined as a target air conditioner, a compressor corresponding to an air conditioner for which the stop condition is not satisfied among the plurality of air conditioners is defined as a non-target compressor, and a compressor operating at or above a predetermined rotation speed that is higher than the lower limit rotation speed is defined as a pre-stop compressor, an air conditioning control program that realizes a function of executing the air volume increase control for the target air conditioner without executing the thermo-off control when the stop condition is satisfied in any of the multiple air conditioners and the pre-stop compressor is present among one or more of the non-target compressors.

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