JP2009270770A - Air conditioning control device and air conditioning control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save energy when a load is small in an air conditioned space. <P>SOLUTION: In an air conditioning control device 3, indoor temperature tpv in the air conditioned space 2 is compared with temperature tSpv of air supply to the air conditioned space 2. When tpv≈tSpv is confirmed, an opening θR of a return air damper 10 is set to be 0% (full closing), and an opening θA of an outside air damper 8 and an opening θV of a ventilation damper 9 are set to be 100% (full opening). Rotational frequency control command INV1 to an inverter 1-5 and rotational frequency control command INV2 to an inverter 13 are changed to lower rotational frequency of an air supply fan 1-4 and a return air fan 11, so as to reduce the amount of air supply to the air conditioned space 2 and the amount of ventilation from the air conditioned space 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioning control device used in an air conditioning control system in which a part of ventilation from an air-conditioned space is returned to an air conditioner together with outside air.

  Conventionally, when supplying air supply from an air conditioner to an air conditioned space, energy saving operation of the air conditioner is performed by returning a part of the ventilation from the air conditioned space to the air conditioner together with the outside air as return air. Yes. FIG. 7 shows an example of an air conditioning control system that returns the return air to the air conditioner (see, for example, Patent Document 1).

  In FIG. 7, 1 is an air conditioner, 2 is an air-conditioned space that receives supply of air supply from the air conditioner 1, 3 is an air-conditioning control device, and 4 detects the temperature of air supply to the air-conditioned space 2. Supply air temperature sensor, 5 is a cold water valve, 6 is a hot water valve, 7 is a humidification valve, 8 is an external air damper provided in an external air supply passage to the air conditioner 1, and 9 is an external air for ventilation from the air-conditioned space 2 Ventilation dampers provided in the discharge passages 10, 10 is a return air damper provided in the return passage of return air to be returned to the air conditioner 1, and 11 is a ventilator for the ventilation damper 9 and the return air damper 10 from the air-conditioned space 2. An exhaust fan (return air fan) provided in the outflow passage, 12 is a ventilation fan provided in the discharge passage from the air-conditioned space 2 to the outside air for ventilation. The return air fan 11 is provided with an inverter 13 for adjusting the rotational speed. In the air-conditioned space 2, a humidity setting device 14, a temperature setting device 15, a humidity sensor 16, and a temperature sensor 17 are provided.

  The air conditioner 1 includes a cooling coil (cooling heat exchanger) 1-1, a heating coil (heating heat exchanger) 1-2, a humidifier 1-3, and a blower (air supply fan) 1-4. have. The cold water valve 5 is provided in the cold water supply passage to the cooling coil 1-1. The hot water valve 6 is provided in a hot water supply passage to the heating coil 1-2. The humidifying valve 7 is provided in the humidifying water supply passage to the humidifier 1-3. The air supply fan 1-4 is provided with an inverter 1-5 for adjusting the rotational speed.

  In this air conditioning control system, the humidity setting value for the air-conditioned space 2 from the humidity setting device 14 is set as the indoor humidity setting value Hsp in the air conditioning control device 3, and the temperature for the air-conditioned space 2 from the temperature setting device 15 is set. The set value is set as the set value tsp of the room temperature. Further, the air conditioning control device 3 includes an actual measurement value Hpv of humidity (indoor humidity) in the air-conditioned space 2 detected by the humidity sensor 16 and a temperature (indoor temperature) in the air-conditioned space 2 detected by the temperature sensor 17. An actual measurement value tpv and an actual measurement value tSpv of the temperature (supply temperature) of the supply air to the air-conditioned space 2 detected by the supply air temperature sensor 4 are given.

  The air conditioning control device 3 acquires the measured value tpv of the room temperature from the temperature sensor 17 and the set value tsp of the room temperature from the temperature setting unit 15, and the measured value tpv of the room temperature and the set value tsp of the room temperature are obtained. The opening θ1 of the cold water valve 5 and the opening θ2 of the hot water valve 6 are controlled so as to match. Moreover, the rotation speed of the air supply fan 1-4 of the air conditioner 1 is controlled. As a result, the amount of cold water to the cooling coil 1-1 of the air conditioner 1 and the amount of hot water to the hot water coil 1-2 are adjusted, the amount of air supplied from the air conditioner 1 is adjusted, and the adjusted air-conditioned space 2 The temperature of the supply air to is controlled.

  In addition, the air conditioning control device 3 acquires the measured value Hpv of the indoor humidity from the humidity sensor 16 and the set value Hsp of the indoor humidity from the humidity setting device 14, and the measured value Hpv of the indoor humidity and the set value Hsp of the indoor humidity. Is controlled so that the opening degree θ3 of the humidifying valve 7 is matched. Thereby, the quantity of the humidification water to the humidifier 1-3 of the air conditioner 1 is adjusted, and the quantity of the moisture contained in the supply air to the air-conditioned space 2 is controlled.

  In addition, the air conditioning control device 3 controls the opening degree θA of the outside air damper 8, the opening degree θV of the ventilation damper 9, and the opening degree θR of the return air damper 10 in controlling the supply air temperature and the supply air humidity. Adjust the ratio of outside air and return air to Aircraft 1. In addition, the rotational speed control command INV1 is sent to the inverter 1-5, the rotational speed of the air supply fan 1-4 is controlled, and the amount of air supply from the air supply fan 1-4 to the air-conditioned space 2 is adjusted. . Further, the rotational speed control command INV2 is sent to the inverter 13 to control the rotational speed of the return air fan 11, and the amount of ventilation from the air-conditioned space 2 through the return air fan 11 is adjusted. The ventilation fan 12 is turned on by schedule control or the like from a central monitoring device (not shown) to ensure a certain amount of ventilation from the air-conditioned space 2 to the outside air.

  FIG. 7 shows the supply / exhaust control state when the load in the air-conditioned space 2 is small. In this example, it is assumed that outside air cooling and CO2 control are not working. In this case, the amount of outside air taken into the air conditioner 1 is “3000”, the amount of air supplied from the air supply fan 1-4 to the air-conditioned space 2 is “6000”, and the air-conditioned space 2 through the ventilation fan 12 If the amount of ventilation from the air to the outside air is “2000”, the amount of ventilation from the air-conditioned space 2 via the return air fan 11 becomes “4000”, and the amount of return air to the air conditioner 1 via the return air damper 10 is The amount is “3000”, and the amount of ventilation to the outside air through the ventilation damper 9 is “1000”.

  When the load in the air-conditioned space 2 is small, the air-conditioning control device 3 adjusts the supply air temperature and the supply air volume while balancing the load in this way, and processes the load in the air-conditioned space 2.

JP-A-8-271027

  FIG. 8 shows an example of changes in supply air temperature and supply air volume throughout the year in the air conditioning control system described above. As in this example, the supply air temperature and the supply air flow fluctuate according to the annual load. Here, when the load is small, such as in an intermediate period or winter season, the supply air temperature may be almost the same as the room temperature. At this time, in the entire air conditioning control system, the air conditioner 1 is operating only to ensure ventilation within the air-conditioned space 2.

  Thus, conventionally, when the load in the air-conditioned space 2 is small, the air conditioner 1 operates only to ensure ventilation in the air-conditioned space 2. In this case, a desired supply air temperature can be ensured with a small amount of heat without returning the return air to the air conditioner 1. However, conventionally, the return air is returned to the air conditioner 1, and the power for returning the return air is wasted.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an air conditioning control device and an air conditioning control method capable of saving energy when the load in the air-conditioned space is small. There is.

  In order to achieve such an object, the present invention provides a return air means (return air damper) for returning a part of the ventilation from the air-conditioned space as return air to the air conditioner and the air-conditioned air from the air conditioner. Air conditioning control provided with an air supply amount adjusting means (air supply fan) for adjusting the amount of air supply to the space and a ventilation amount adjusting means (return air fan) for adjusting the amount of ventilation discharged from the air-conditioned space In the air conditioning control device used in the system, if the indoor temperature of the air-conditioned space and the temperature of the supply air to the air-conditioned space are almost the same, the amount of return air to the air conditioner returned by the return air means In addition to reducing the current amount of return air, the amount of air supply to the air-conditioned space and the amount of ventilation from the air-conditioned space are reduced by reducing the amount of adjustment in the air supply amount adjustment means and the ventilation amount adjustment means. Control state switching means to reduce the amount of air and the amount of ventilation is provided .

  According to the present invention, when the temperature of the air supply to the air-conditioned space is substantially the same as the room temperature, the amount of return air to the air conditioner is reduced, and the amount of air supplied to the air-conditioned space and the air-conditioned air The amount of ventilation from the space is reduced. For example, the return air damper provided in the return air supply passage to the air conditioner is fully closed, and the air supply fan and the return air fan are throttled to reduce the amount of air supplied to the air-conditioned space and the air-conditioned space. Reduce the amount of ventilation. As a result, it is possible to save energy by reducing the power of the air supply fan and the return air fan.

  When the temperature of the supply air to the air-conditioned space is almost the same as the room temperature, for example, if the return air damper is fully closed and the outside air damper and the ventilation damper are fully open, the resistance of the flow path Thus, the power of the supply air fan and the return air fan can be further reduced.

  Further, as an example of the control, from the time when the difference between the room temperature of the air-conditioned space and the temperature of the supply air to the air-conditioned space enters a predetermined deviation range, the room temperature (tpv) and the supply air temperature ( If the opening degree of the return air damper, the opening degree of the outside air damper, the opening degree of the ventilation damper and the air volume of the supply air fan and the return air fan are adjusted according to the degree of deviation from tSpv), the result In particular, toward tpv = tSpv, the return air damper is gradually fully closed, the outside air damper and the ventilation damper are gradually fully opened, and the air volume of the supply air fan and the return air fan is gradually reduced. Therefore, it is possible to prevent hunting by preventing the control state from being switched suddenly.

  As another control example, when the temperature of the supply air to the air-conditioned space is almost the same as the room temperature, the return air damper is gradually fully closed, and the outside air damper and the ventilation damper are gradually fully opened. It is also possible to gradually reduce the air flow of the air supply fan and the return air fan.

  According to the present invention, when the indoor temperature of the air-conditioned space and the temperature of the air supply to the air-conditioned space are substantially the same, the amount of return air to the air conditioner is reduced and the air supply to the air-conditioned space is reduced. Since the amount of air and the amount of ventilation from the air-conditioned space are reduced, the power of the supply air fan and the return air fan can be reduced to save energy.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an instrumentation diagram showing an embodiment of an air conditioning control system using an air conditioning control device according to the present invention. In this figure, the same reference numerals as those in FIG. 7 denote the same or equivalent components as those described with reference to FIG.

  In this embodiment, the overall system configuration is the same as the system configuration shown in FIG. 7, but the functions of the air conditioning control device are different. Hereinafter, in order to distinguish from the air conditioning control device 3 of the air conditioning control system in FIG.

  FIG. 2 shows an outline of the hardware configuration of the air conditioning control device 30. In the figure, 30-1 is a CPU, 30-2 is a RAM, 30-3 is a ROM, 30-4 is a storage device such as a hard disk, and 30-5 to 30-9 are interfaces. The CPU 30-1 operates in accordance with a program stored in the ROM 30-3 or the storage device 30-4 while accessing the RAM 30-2.

  The storage device 30-4 stores a supply / exhaust control state switching program for switching the supply / exhaust control state for the air-conditioned space 2 at the time of light load as a program unique to the present embodiment. Hereinafter, the switching of the supply / exhaust control state is referred to as ventilation switching, and the supply / exhaust control state switching program is referred to as ventilation switching control program. This ventilation switching control program is provided in a state where it is recorded on a recording medium such as a CD-ROM, and is read from this recording medium and installed in the storage device 30-4.

  FIG. 3 shows a functional block diagram of the main part of the air conditioning control device 30. The air conditioning control device 30 compares the indoor temperature tpv of the air-conditioned space 2 with the temperature comparison unit 30A that compares the temperature tSpv of the supply air to the air-conditioned space 2, and the indoor temperature tpv of the air-conditioned space 2 in the temperature comparison unit 30A. And the temperature tSpv of the supply air to the air-conditioned space 2 are confirmed to be substantially the same, the opening degree θR of the return air damper 10 is 0% (fully closed), and the opening degree θA of the outside air damper 8 is While the opening degree θV of the ventilation damper 9 is set to 100% (fully open), the rotation speed control command INV1 to the inverter 1-5 and the rotation speed control command INV2 to the inverter 13 are changed to change the supply fan 1- 4 and a control state switching part (ventilation switching part) 30B for lowering the rotational speed of the return air fan 11. In this air conditioning control device 30, the temperature comparison unit 30A and the control state switching unit 30B are realized as processing functions of the CPU 30-1 (FIG. 2).

  Hereinafter, processing operations executed by the CPU 30-1 according to the ventilation switching control program stored in the storage device 3-4 will be described with reference to the flowchart shown in FIG.

[Comparison between indoor temperature and supply air temperature]
The CPU 30-1 acquires the measured value tpv of the room temperature from the temperature sensor 17 (step S101), acquires the measured value tSpv of the supply air temperature from the supply air temperature sensor 4 (step S102), and acquires the acquired room temperature. Is compared with the actual measured value tSpv of the supply air temperature (step S103).

  Here, if the measured value tpv of the room temperature and the measured value tSpv of the supply air temperature are substantially the same (tpv≈tSpv) (YES in step S103), the load in the air-conditioned space 2 is light. It is assumed that the processing proceeds to the processing after step S104 (ventilation switching processing).

  In this case, it is assumed that outside air cooling and CO2 control are not working, the amount of outside air taken into the air conditioner 1 is “3000”, and the amount of air supplied from the air supply fan 1-4 to the air-conditioned space 2 is The amount is “6000”, the amount of ventilation to the outside air from the air-conditioned space 2 via the ventilation fan 12 is “2000”, the amount of ventilation from the air-conditioned space 2 via the return air fan 11 is “4000”, and the return air The amount of return air to the air conditioner 1 through the damper 10 is “3000”, and the amount of ventilation to the outside air through the ventilation damper 9 is “1000”. Further, it is assumed that the air conditioner 1 performs heating of “6 ° C. × 6000”.

  In this embodiment, whether or not the actual measured value tpv of the room temperature and the actual measured value tSpv of the supply air temperature are substantially the same is determined by tSpv> (tpv−α) and tSpv <(tpv + β ). Note that the set value of the supply air temperature is tSsp, and it is determined whether or not the room temperature and the supply air temperature are substantially the same based on tSsp> (tpv−α) and tSsp <(tpv + β). May be.

[Ventilation switching]
When the CPU 30-1 confirms that the measured value tpv of the room temperature and the measured value tSpv of the supply air temperature are substantially the same (YES in step S103), the opening degree θR of the return air damper 10 is set to 0% (all Closed) (step S104). Further, the opening degree θA of the outside air damper 8 and the opening degree θV of the ventilation damper 9 are set to 100% (fully open) (step S105). In this case, it suffices if the amount of return air to the air conditioner 1 can be greatly reduced from the current amount of return air, and the opening degree θR of the return air damper 10 is not necessarily 0% (fully closed). Good.

  Further, the CPU 30-1 changes the rotational speed control command INV1 to the inverter 1-5, lowers the rotational speed of the air supply fan 1-4, and supplies the air-conditioned space 2 from the air supply fan 1-4. The amount of energy is reduced (step S106). In this example, as shown in FIG. 5, the amount of air supplied from the air supply fan 1-4 to the air-conditioned space 2 is “3000”. That is, the amount of air supply that was “6000” until then (the current amount of air supply) is reduced to “3000”.

  Further, the CPU 30-1 changes the rotational speed control command INV2 to the inverter 13, lowers the rotational speed of the return air fan 11, and reduces the amount of ventilation from the air-conditioned space 2 through the return air fan 11 (step). S107). In this example, as shown in FIG. 5, the amount of ventilation from the air-conditioned space 2 through the return air fan 11 is “1000”. That is, the amount of ventilation (current amount of ventilation) that was “4000” is reduced to “1000”.

  In this case, in the air conditioner 1, what was previously heated at “6 ° C. × 6000” will be heated at “12 ° C. × 3000”, and there is no change in the amount of heat consumed by the air conditioner 1, The indoor environment in the air-conditioned space 2 does not change. Further, the amount of ventilation to the outside air through the ventilation fan 12 is “2000”, and the amount of ventilation to the outside air through the ventilation damper 9 is “1000”, which is “3000” as a total, and thus is discharged to the outside air. The amount of ventilation does not change. On the other hand, since the rotation speed of the air supply fan 1-4 and the return air fan 11 is lowered, the power is reduced.

  As described above, in the present embodiment, when the load of the air-conditioned space 2 is light, the air supply fan 1-is changed without changing the heat consumption in the air conditioner 1, the ventilation amount to the outside air, and the indoor environment. The amount of air supplied to the air-conditioned space 2 from 4 and the amount of ventilation from the air-conditioned space 2 via the return air fan 11 are greatly reduced, and energy saving is achieved.

  In the above-described embodiment, when the temperature tSpv of the supply air to the air-conditioned space 2 becomes substantially the same as the indoor temperature tpv, the return air damper 10 is fully closed, and the outside air damper 8 and the ventilation damper 9 are Although it is fully open, the outside air damper 8 and the ventilation damper 9 do not necessarily have to be fully open. When the outside air damper 8 and the ventilation damper 9 are fully opened, the resistance of the flow path can be reduced, and the power of the supply air fan 1-4 and the return air fan 11 can be further reduced.

  In the above-described embodiment, when the temperature tSpv of the supply air to the air-conditioned space 2 becomes substantially the same as the indoor temperature tpv, the return air damper 10 is fully closed, and the outside air damper 8 and the ventilation damper 9 are The airflow of the supply air fan 1-4 and the return air fan 11 is reduced to the lower limit when switching ventilation, but the difference between the room temperature tpv and the supply air temperature tSpv is within a predetermined deviation range. From the time point, according to the degree of deviation between the indoor temperature tpv and the supply air temperature tSpv, the opening degree θA of the outside air damper 8, the opening degree θV of the ventilation damper 9, the opening degree θR of the return air damper 10, and the air supply fan You may make it adjust the rotation speed of 1-4 and the return air fan 11. FIG.

  As a result, as shown in FIG. 6, as a result, the return air damper 10 is gradually fully closed and the outside air damper 8 and the ventilation damper 9 are gradually turned toward tpv = tSpv. The air flow of the supply air fan 1-4 and the return air fan 11 can be gradually reduced to the lower limit value at the time of switching the ventilation, so that the ventilation switching is not performed suddenly. Can be prevented.

  As another control example, when the room temperature tpv and the supply air temperature tSpv are substantially the same, the return air damper 10 is immediately fully closed, the outside air damper 8 and the ventilation damper 9 are fully opened, Rather than restricting the air volume of the air fan 1-4 and the return air fan 11 to the lower limit value when switching the ventilation, the return air damper 10 is gradually fully closed, and the outside air damper 8 and the ventilation damper 9 are gradually fully opened. The air volume of the supply air fan 1-4 and the return air fan 11 may be gradually reduced to the lower limit value when switching ventilation.

1 is an instrumentation diagram showing an embodiment of an air conditioning control system using an air conditioning control device according to the present invention. It is a figure which shows the outline of the hardware constitutions of the air-conditioning control apparatus in this air-conditioning control system. It is a functional block diagram of the principal part of this air-conditioning control apparatus. It is a flowchart which shows the processing operation according to the ventilation switching control program which CPU of this air-conditioning control apparatus performs. It is a figure explaining the state of the system after ventilation switching. It is a figure which shows the example of control at the time of making it perform ventilation switching gradually. It is an instrumentation figure which shows an example of the conventional air-conditioning control system which returned the return air to the air conditioner. It is a figure which shows the example of a change of the supply air temperature and the supply air volume throughout the year in this air-conditioning control system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2 ... Air-conditioned space (indoor), 1-1 ... Cooling coil, 1-2 ... Heating coil, 1-3 ... Humidifier, 1-4 ... Blower (air supply fan), 1-5 ... Inverter, 4 ... Supply air temperature sensor, 5 ... Cold water valve, 6 ... Hot water valve, 7 ... Humidification valve, 8 ... Outside air damper, 9 ... Ventilation damper, 10 ... Return air damper, 11 ... Exhaust fan (return air fan), DESCRIPTION OF SYMBOLS 12 ... Ventilation fan, 13 ... Inverter, 14 ... Humidity setting device, 15 ... Temperature setting device, 16 ... Humidity sensor, 17 ... Temperature sensor, 30 ... Air-conditioning control apparatus, 30-1 ... CPU, 30-2 ... RAM, 30 -3 ... ROM, 30-4 ... storage device, 30-5 to 30-9 ... interface, 30A ... temperature comparison part, 30B ... control state switching part (ventilation switching part).

Claims (8)

Return air means for returning a part of the ventilation from the air-conditioned space to the air conditioner together with outside air, and an air supply amount adjusting means for adjusting the amount of air supplied from the air conditioner to the air-conditioned space; In the air conditioning control device used in an air conditioning control system comprising a ventilation amount adjusting means for adjusting the amount of ventilation discharged from the air-conditioned space,
When the room temperature of the air-conditioned space and the temperature of the supply air to the air-conditioned space are substantially the same, the amount of return air to the air conditioner returned by the return air means is set to the current return air amount. The amount of air supplied to the air-conditioned space and the amount of ventilation from the air-conditioned space are reduced by reducing the amount of adjustment by the air supply amount adjusting means and the ventilation amount adjusting means. An air conditioning control device comprising control state switching means for reducing the amount of air and the amount of ventilation. In the air-conditioning control device according to claim 1,
The control state switching means is
When the indoor temperature of the air-conditioned space and the temperature of the supply air to the air-conditioned space are substantially the same, the return air damper provided in the return air supply passage to the air conditioner is fully closed, Further, the air supply amount adjusting means and the ventilation amount are set by fully opening the outside air damper provided in the outside air supply passage to the air conditioner and the ventilation damper provided in the discharge passage to the outside air for ventilation from the air-conditioned space. An air-conditioning control device characterized by narrowing the amount of adjustment by the adjusting means. In the air-conditioning control device according to claim 1,
The control state switching means is
From the time when the difference between the indoor temperature of the air-conditioned space and the temperature of the air supply to the air-conditioned space enters a predetermined deviation range, according to the degree of deviation between the room temperature and the temperature of the air supply, The opening degree of the return air damper provided in the return air supply passage to the air conditioner, the opening degree of the outside air damper provided in the outside air supply passage to the air conditioner, and the ventilation air from the air-conditioned space to the outside air An air conditioning control device characterized by adjusting an opening degree of a ventilation damper provided in a discharge passage, and an adjustment amount by the supply air amount adjusting means and the ventilation amount adjusting means. In the air-conditioning control device according to claim 1,
The control state switching means is
When the indoor temperature of the air-conditioned space and the temperature of the supply air to the air-conditioned space are substantially the same, gradually close the return air damper provided in the return air supply passage to the air conditioner. And gradually opening the ventilation damper provided in the outside air damper provided in the outside air supply passage to the air conditioner and the ventilation passage provided to the outside air for ventilation from the air-conditioned space, and the air supply amount adjusting means And an air conditioning control device characterized by gradually reducing the amount of adjustment by the ventilation amount adjusting means. Return air means for returning a part of the ventilation from the air-conditioned space to the air conditioner together with outside air, and an air supply amount adjusting means for adjusting the amount of air supplied from the air conditioner to the air-conditioned space; In the air-conditioning control method applied to the air-conditioning control system provided with a ventilation amount adjusting means for adjusting the amount of ventilation discharged from the air-conditioned space,
When the room temperature of the air-conditioned space and the temperature of the supply air to the air-conditioned space are substantially the same, the amount of return air to the air conditioner returned by the return air means is set to the current return air amount. The amount of air supplied to the air-conditioned space and the amount of ventilation from the air-conditioned space are reduced by reducing the amount of adjustment by the air supply amount adjusting means and the ventilation amount adjusting means. An air-conditioning control method comprising: a control state switching step for reducing the amount of air and the amount of ventilation. In the air-conditioning control method according to claim 5,
The control state switching step includes
When the indoor temperature of the air-conditioned space and the temperature of the supply air to the air-conditioned space are substantially the same, the return air damper provided in the return air supply passage to the air conditioner is fully closed, Further, the air supply amount adjusting means and the ventilation amount are set by fully opening the outside air damper provided in the outside air supply passage to the air conditioner and the ventilation damper provided in the discharge passage to the outside air for ventilation from the air-conditioned space. An air conditioning control method characterized by narrowing an adjustment amount by the adjusting means. In the air-conditioning control method according to claim 5,
The control state switching step includes
From the time when the difference between the indoor temperature of the air-conditioned space and the temperature of the air supply to the air-conditioned space enters a predetermined deviation range, according to the degree of deviation between the room temperature and the temperature of the air supply, The opening degree of the return air damper provided in the return air supply passage to the air conditioner, the opening degree of the outside air damper provided in the outside air supply passage to the air conditioner, and the ventilation air from the air-conditioned space to the outside air An air conditioning control method characterized by adjusting an opening degree of a ventilation damper provided in a discharge passage, and an adjustment amount by the air supply amount adjusting means and the ventilation amount adjusting means. In the air-conditioning control method according to claim 5,
The control state switching step includes
When the indoor temperature of the air-conditioned space and the temperature of the supply air to the air-conditioned space are substantially the same, the return air damper provided in the return air supply passage to the air conditioner is gradually fully closed. And gradually opening the ventilation damper provided in the outside air damper provided in the outside air supply passage to the air conditioner and the ventilation passage provided in the outside air to be ventilated from the air-conditioned space. And an air conditioning control method characterized by gradually reducing the amount of adjustment by the ventilation amount adjusting means.

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