JP6146031B2 - Air conditioning system - Google Patents

Description

  The present invention relates to an air conditioning system in which an air conditioner and a ventilation device are interlocked.

As an air conditioning system in which an air conditioner and a ventilation device are interlocked, for example, a technique described in Patent Document 1 is known.
In this technique, an air conditioner and a ventilator are accommodated in one housing. Then, based on the difference between the set temperature set by the remote controller of the air conditioner and the room temperature and the time change of this difference, the air flow rate of the air conditioning blower is changed.

JP 2004-3866 A

  By the way, in an air conditioning system that controls an air conditioner and a ventilator in conjunction with each other, the temperature setting may be changed by a remote controller during operation of the air conditioner. In this case, the load of the air conditioner may become excessive due to the intake of outside air by interlocking the ventilation device. At this time, the time until the room temperature approaches the set temperature is longer than when the load of the air conditioner is appropriate.

  The present invention has been made in view of such circumstances, and an object of the present invention is to change the setting of the set temperature in an air conditioner system including an air conditioner, a ventilator, and a control unit that links these devices. An object of the present invention is to provide an air-conditioning system that can suppress the occurrence of an event such that the time until the room temperature approaches the set temperature is increased.

  An air conditioning system that solves the above problems includes an air conditioner that adjusts a room temperature based on a set temperature, a ventilator that exchanges indoor air and outdoor air through a total heat exchanger, the operation of the air conditioner, and the ventilation And a control unit that links the operation of the apparatus. During the heating operation, when the set temperature is set to a temperature higher than the set temperature before the setting change and higher than the room temperature, the control unit ventilates the ventilation suppression period with a ventilation amount smaller than a reference ventilation amount. The ventilator is operated as described above. During the cooling operation, when the set temperature is set to a temperature lower than the set temperature before the setting change and lower than the room temperature, the control unit ventilates the ventilation suppression period with a ventilation volume smaller than the reference ventilation volume. The ventilator is operated as described above.

  The user may change the set temperature with the remote controller during the heating operation of the air conditioner. For example, when the user feels cold during the heating operation, the user desires rapid heating in the room. In such a case, the user changes the set temperature to be higher than the temperature set at that time. For this reason, the heating load of the air conditioner increases.

  On the other hand, in an air conditioning system, outdoor air is taken in by linking an air conditioner and a ventilator. Since the outdoor temperature is often lower than the room temperature during the heating operation, the indoor air is cooled by supplying outdoor air. That is, when the air conditioner and the ventilator are linked, in order to maintain the room temperature at the set temperature, an amount of heat for raising the outdoor air to the set temperature is required. This amount of heat becomes the heating load of the air conditioner.

  When the set temperature is changed to a higher temperature during heating operation, the total heating load required for heating the indoor air and the heating load due to ventilation exceed the capacity of the air conditioner, and the heating load is excessive. May be. In this case, due to the insufficient capacity of the air conditioner, the time until the room temperature reaches the set temperature becomes longer, contrary to the user's request.

Such an event also occurs in the cooling operation.
For example, when the user desires rapid cooling in the room, the set temperature is reset to a lower value. At this time, the cooling load of the air conditioner increases. On the other hand, in the conventional air conditioning system, since the ventilator is interlocked with the operation of the air conditioner, outdoor air is taken into the room. Supplying air warms the room air and increases the cooling load of the air conditioner. That is, when the set temperature is changed to a lower temperature during the cooling operation, the sum of the increase in the cooling load necessary for cooling the indoor air and the cooling load due to ventilation exceeds the capacity of the air conditioner, and the cooling load is reduced. May be oversized. In this case, the time required for the room temperature to reach the set temperature becomes long contrary to the user's request.

  On the other hand, according to the above configuration, during the heating operation, when the set temperature is changed to a temperature higher than the set temperature before the setting change and higher than the room temperature, the ventilation amount is made smaller than the reference ventilation amount. To do. That is, when there is a possibility that the heating load becomes excessive, ventilation is suppressed.

  Further, during the cooling operation, when the setting temperature is changed to a temperature lower than the setting temperature before the setting change and lower than the room temperature, the ventilation amount is made smaller than the reference ventilation amount. That is, when there is a possibility that the cooling load becomes excessive, ventilation is suppressed.

  As described above, during the heating operation or the cooling operation of the air conditioner, it is possible to suppress the occurrence of an event such that the time until the room temperature approaches the setting temperature due to the setting change of the setting temperature can be suppressed.

  In the air conditioning system having the above configuration, when the setting temperature is set to a temperature higher than the setting temperature before the setting change and higher than the room temperature during the heating operation, the control unit is configured to change the setting temperature after the setting change. The ventilation suppression period is set to a longer time as the value obtained by subtracting the set temperature before the setting change from 1 is set, and during the cooling operation, the set temperature is lower than the set temperature before the setting change and lower than the room temperature. When the setting is changed to the temperature, the control unit sets the ventilation suppression period to a longer time as the value obtained by subtracting the setting temperature before the setting change from the setting temperature after the setting change is smaller.

  That is, during the heating operation of the air conditioner, the ventilation suppression period is lengthened as the heating load increases. During the cooling operation of the air conditioner, the ventilation suppression period is lengthened as the cooling load increases. Thereby, since the ventilation suppression period is appropriately set, it is possible to suppress insufficient ventilation as compared with the case where the ventilation suppression period is set to a uniformly long period regardless of the load.

  An air conditioning system that solves the above problems includes an air conditioner that adjusts a room temperature based on a set temperature, a single ventilator that exchanges indoor air and outdoor air through a total heat exchanger, and operation of the air conditioner. And a control unit that links the operation of the ventilation device. The air conditioner includes a plurality of indoor units and at least one outdoor unit, and the set temperature can be set by each of the remote controllers provided in the indoor units. For each of the indoor units, the control unit sets the set temperature at the start of a predetermined cycle as the start set temperature for each of the indoor units, sets the set temperature at the end of the predetermined cycle as the end set temperature, A value obtained by subtracting the initial set temperature from the final set temperature is set as a set temperature change amount, and an average value for the room temperature detected by each of the indoor units is calculated as an average room temperature. During the heating operation, when the sum of the set temperature change amounts of the indoor units is larger than the first determination value and the average value of the final set temperature is higher than the average room temperature, the control unit The ventilator is operated to ventilate with a smaller ventilation volume over the ventilation suppression period. During cooling operation, when the sum of the set temperature changes of each of the indoor units is smaller than a second determination value and the average value of the final set temperature is lower than the average room temperature, the control unit The ventilator is operated to ventilate with a smaller ventilation volume over the ventilation suppression period.

This technology is ventilation suppression control in an air conditioning system in which a plurality of indoor units are provided for one ventilation device.
Since each of the indoor units operates independently, one of the indoor units that is linked to the ventilator is selected, and the selected indoor unit and the ventilator are linked to perform ventilation suppression. It is possible to make it. However, this effect may not occur in this case. Therefore, as described above, for each indoor unit, a value obtained by subtracting the set temperature at the start of the predetermined cycle from the set temperature at the end of the predetermined cycle is set as the set temperature change amount for each indoor unit. Then, based on the sum of the set temperature change amounts for each indoor unit and the average value of the final set temperature for each indoor unit, it is determined whether or not the ventilation rate is to be suppressed. As a result, it is possible to appropriately determine whether the air conditioning load is excessive or not for the air conditioning load generated in various sizes by independently changing the setting temperature of each remote controller. It is possible to increase the accuracy of suppressing the occurrence of an event such as the time until the room temperature approaches the set temperature due to the temperature setting change.

  In the air conditioning system having the above configuration, when the sum of the set temperature change amounts of the indoor units is larger than the first determination value and the average value of the final set temperature is higher than the average room temperature during the heating operation. The ventilation suppression period is set to a longer time as the sum of the set temperature changes is larger. During cooling operation, when the total set temperature change amount of each of the indoor units is smaller than the second determination value and the average value of the final set temperature is lower than the average room temperature, the total set temperature change amount The smaller the is, the longer the ventilation suppression period is set.

  That is, during the heating operation of the air conditioner, the ventilation suppression period is lengthened as the heating load increases. During the cooling operation of the air conditioner, the ventilation suppression period is lengthened as the cooling load increases. Thereby, since the ventilation suppression period is appropriately set, the reduction of the ventilation amount can be reduced as compared with the case where the ventilation suppression period is set to a uniformly long period regardless of the load.

  An air conditioning system that solves the above problems includes a plurality of air conditioners that adjust the room temperature based on a set temperature set by a remote controller, and a single ventilation that exchanges indoor air and outdoor air through a total heat exchanger. An apparatus and a control unit that links the operation of the air conditioner and the operation of the ventilation device. The air conditioner includes a plurality of indoor units and at least one outdoor unit, and the set temperature can be set by each of the remote controllers provided in the indoor units. For each of the indoor units, the control unit sets the set temperature at the start of the predetermined cycle as the start set temperature and sets the set temperature at the end of the predetermined cycle as the end set temperature for each of the indoor units. In addition, the control unit detects the presence / absence of a change in the set temperature for each of the indoor units at predetermined intervals. During heating operation, for the indoor units of more than half of these indoor units, the set temperature is set to a temperature higher than the set temperature before the setting change in the same cycle, and the average value of the final set temperature is When the temperature is higher than the average value of the initial set temperature, the ventilator is operated so as to ventilate over a ventilation suppression period with a ventilation volume smaller than the reference ventilation volume. During cooling operation, for the indoor units of more than half of these indoor units, in the same cycle, the set temperature is set to a temperature lower than the set temperature before the setting change, and the average value of the final set temperature is When the temperature is lower than the average value of the initial set temperature, the ventilator is operated so as to ventilate over a ventilation suppression period with a ventilation volume smaller than the reference ventilation volume.

This technology is ventilation suppression control in an air conditioning system in which a plurality of indoor units are provided for one ventilation device.
In the above configuration, the presence / absence of a change in set temperature is detected for each indoor unit at predetermined intervals. And about half or more indoor units among these indoor units, ventilation is suppressed based on the setting change of the set temperature to a temperature (or lower temperature) higher than the set temperature before the setting change in the same cycle. It is determined whether or not. In such a method, it is possible to appropriately determine whether or not the air conditioning load is excessive with respect to the air conditioning load generated in various sizes by changing the setting of the set temperature independently in each indoor unit. Therefore, it is possible to increase the accuracy of suppressing the occurrence of such an event that the time until the room temperature approaches the set temperature due to the setting change of the set temperature is increased.

  The air conditioning system having the above configuration controls the ventilation amount based on a change in setting temperature. Thereby, it is possible to suppress the occurrence of an event such that the time until the room temperature approaches the set temperature due to the change in the set temperature is increased.

The schematic diagram of an air conditioning system. FIG. 2A is a schematic diagram illustrating a setting change of the set temperature during the heating operation, and FIG. 2B is a schematic diagram illustrating a setting change of the set temperature during the cooling operation. The flowchart which shows the process sequence of the "ventilation setting process" at the time of heating operation. The flowchart which shows the process sequence of the "ventilation setting process" at the time of air_conditionaing | cooling operation. Map for setting the ventilation rate in the suppression mode during heating operation. Map for setting the ventilation rate in the suppression mode during cooling operation. FIG. 7A is a map for setting the ventilation suppression period in the suppression mode during heating operation, and FIG. 7B is a map for setting the ventilation suppression period in the suppression mode during cooling operation. The figure which shows the time change of preset temperature, room temperature, a temperature difference, ventilation volume, and heating load. The schematic diagram which shows the modification of an air conditioning system. The schematic diagram which shows the modification of an air conditioning system.

(First embodiment)
An example of an air conditioning system will be described with reference to FIG.
The air conditioning system includes an air conditioner 1 and a ventilation device 2.

  The air conditioner 1 and the ventilation device 2 are provided for the region S partitioned by the side wall 51 and the ceiling wall 50. For example, the air conditioner 1 and the ventilation device 2 are installed in a room having a region S partitioned by a ceiling wall 50 and a side wall 51. The air conditioner 1 adjusts the temperature of the region S, and the ventilator 2 performs ventilation of the region S. The region S means “indoor”.

The air conditioner 1 will be described.
The air conditioner 1 includes an indoor unit 10 and an outdoor unit 20.
The indoor unit 10 includes an expansion valve 11 that expands the refrigerant, an indoor heat exchanger 12, an indoor fan 13, an indoor unit control device 15, and a housing 17 having an air suction port 17a and an air outlet 17b. I have. A temperature sensor 14 for measuring the room temperature TR is provided near the suction side of the indoor fan 13.

  The indoor unit control device 15 controls the expansion valve 11 and the indoor fan 13 based on the set temperature TS set by the remote controller 16. The indoor unit control device 15 transmits the setting information (for example, the set temperature TS) set by the remote controller 16 and the temperature information such as the room temperature TR detected by the air conditioner 1 to the ventilator 2.

  The outdoor unit 20 includes a compressor 21 that compresses the refrigerant, an outdoor heat exchanger 22, an outdoor fan 23, a four-way switching valve 24, an outdoor unit control device 25 that controls the compressor 21, and And an oil separator 26 for separating the lubricating oil. These devices 21 to 26 are accommodated in a casing 27.

  The expansion valve 11, the indoor heat exchanger 12, the four-way switching valve 24, the compressor 21, the oil separator 26, and the outdoor heat exchanger 22 are each connected by a refrigerant pipe 41 to form a single refrigerant circuit. Configure.

The air conditioner 1 performs a cooling operation, a blowing operation, and a heating operation.
In the cooling operation, the indoor heat exchanger 12 acts as an evaporator, and the outdoor heat exchanger 22 acts as a condenser. Specifically, the outdoor unit control device 25 includes a valve body of the four-way switching valve 24 so that the refrigerant circulates in the order of the compressor 21, the outdoor heat exchanger 22, the expansion valve 11, and the indoor heat exchanger 12. Switch position. In FIG. 1, the solid line indicating the four-way switching valve 24 indicates the pipe connection state after the switching.

In the air blowing operation, the indoor unit control device 15 controls the operation of the indoor fan 13, and the outdoor unit control device 25 stops the operations of the compressor 21 and the outdoor fan 23.
In the heating operation, the indoor heat exchanger 12 is operated as a condenser, and the outdoor heat exchanger 22 is operated as an evaporator. Specifically, the outdoor unit control device 25 includes a valve body of the four-way switching valve 24 so that the refrigerant circulates in the order of the compressor 21, the indoor heat exchanger 12, the expansion valve 11, and the outdoor heat exchanger 22. Switch position. In addition, the broken line of the part which shows the four-way switching valve 24 in FIG. 1 shows the pipe connection state after this switching.

Next, the ventilation device 2 will be described.
The ventilation device 2 includes a total heat exchanger 30 that exchanges heat between room air and outdoor air, an air supply fan 31 that supplies outdoor air to the room, an exhaust fan 32 that exhausts room air, and ventilation control. The apparatus 36 and the housing | casing 33 which accommodates these apparatuses are provided.

  The casing 33 is provided with an outside air inlet 33a for taking in outdoor air, an outside air inlet 33b for sending outdoor air into the room, an inside air inlet 33c for taking in room air, and an inside air outlet 33d for sending room air outside. Yes.

  A carbon dioxide sensor 35 is attached in the vicinity of the inside air inlet 33c. The carbon dioxide sensor 35 outputs a signal according to the concentration of the inhaled indoor air in the carbon dioxide sensor 35 to the ventilation control device 36.

An outside air intake pipe 34 a for taking outdoor air into the housing 33 is provided at the outside air inlet 33 a. The outdoor air supply port 33b is provided with a supply pipe 34b for supplying outdoor air into the room.
An inside air suction pipe 34c for taking room air into the housing 33 is provided at the inside air inlet 33c. The inside air exhaust port 33d is provided with an exhaust pipe 34d for exhausting room air to the outside.

The total heat exchanger 30 exchanges sensible heat and latent heat between room air and outdoor air.
The ventilation control device 36 controls the operation of the ventilation device 2 and controls the ventilation amount of the ventilation device 2 as follows.

The ventilation device 2 controls the ventilation amount in two stages.
・ The setting with the largest ventilation is called “H mode”.
・ Setting of the ventilation volume smaller than the ventilation volume of "H mode" is called "L mode".

  In the H mode, the ventilation amount is set to the set value H. In the L mode, the ventilation amount is set to the set value L. The ventilation amount in the L mode is smaller than the reference ventilation amount X. The reference ventilation amount X is set to a small value so as not to affect the air conditioning capability of the air conditioner 1 when ventilation is performed.

  Further, the ventilation control device 36 performs ventilation based on the setting information (for example, the set temperature TS) and the temperature information (for example, the room temperature TR) output from the air conditioner 1 and the setting temperature TS being changed. Control the amount.

Next, the communication device 42 for exchanging information between the air conditioner 1 and the ventilation device 2 will be described.
The communication device 42 includes a control unit 43 that performs communication control, and a communication line 44 that connects the indoor unit control device 15 and the ventilation control device 36. The communication device 42 acquires setting information and temperature information output from the air conditioner 1, and performs a predetermined determination based on these information. And based on this determination, the control signal for controlling the ventilator 2 is formed, and this control signal is transmitted to the ventilator 2. In FIG. 1, the communication line 44 is shown as a wire, but the communication line 44 may be configured wirelessly.

With reference to FIG. 2, a mode of changing the setting temperature TS will be described.
As shown in FIG. 2A, the set temperature TS may be changed at the start of the heating operation or during the heating operation.

  For example, when the user feels cold or when the user wants to quickly increase the room temperature TR, the user of the air conditioner 1 is reset to a higher value of the set temperature TS. In this case, since the temperature difference ΔTA between the set temperature TS and the room temperature TR is larger than before the setting is changed, the heating load of the air conditioner 1 is increased.

  When the setting is changed as described above, if the ventilation is performed in the normal mode, the heating load of the air conditioner 1 may increase beyond the capacity of the air conditioner 1. When the setting temperature TS is changed to a higher setting, the difference between the outdoor temperature and the room temperature TR is often large. Therefore, by performing ventilation, the room temperature TR decreases and the heating load becomes excessive. When the heating load becomes excessive with respect to the capacity of the air conditioner 1, there is a problem that the temperature increase rate of the room temperature TR becomes small and the time until the room temperature TR approaches the set temperature TS becomes long.

With reference to FIG.2 (b), the aspect of the setting change of the setting temperature TS at the time of air_conditionaing | cooling operation is demonstrated.
For example, when the user feels hot or when the user wants to quickly lower the room temperature TR, the user of the air conditioner 1 resets the set temperature TS to a low value. In this case, since the temperature difference ΔTA between the set temperature TS and the room temperature TR is larger than before the setting is changed, the cooling load of the air conditioner 1 is increased.

  When the setting is changed in this way, if the ventilation is performed in the normal mode, the cooling load of the air conditioner 1 may increase beyond the capacity of the air conditioner 1. When the setting temperature TS is changed to a lower value, the difference between the outdoor temperature and the room temperature TR is often large. Therefore, the ventilation load increases the room temperature TR and the cooling load becomes excessive. When the cooling load is excessive with respect to the capacity of the air conditioner 1, there is a problem that the temperature decrease rate of the room temperature TR becomes small and the time until the room temperature TR approaches the set temperature TS becomes long.

  From such circumstances, in the present air conditioning system, the magnitude of the ventilation amount is changed based on the setting change of the temperature setting of the air conditioner 1. Hereinafter, the ventilation setting process executed at the time of heating operation and cooling operation will be described.

With reference to FIG. 3, the “ventilation setting process” executed by the control unit 43 during the heating operation will be described.
In addition, the control part 43 performs a "ventilation setting process" with a predetermined period during heating operation.

  In step S110, it is determined in the air conditioner 1 whether or not the set temperature TS has been changed by the remote controller 16. When an affirmative determination (YES determination) is made in this determination, that is, when it is determined that the setting temperature TS has been changed, the process proceeds to the next step S120. When a negative determination (NO determination) is made in this determination, the process proceeds to step S150 and a determination is made that ventilation is performed in the “normal mode”.

  In step S120, the set temperature TSb before the setting change is compared with the set temperature TSa after the setting change. When the setting temperature TSa after the setting change is larger than the setting temperature TSb before the setting change (YES determination), the process proceeds to the next step S130. On the other hand, when the set temperature TSa after the setting change is equal to or lower than the set temperature TSb before the setting change (NO determination), the process proceeds to step S150 and a determination is made that ventilation is performed in the “normal mode”.

  In step S130, it is determined whether or not the set temperature TSa after the setting change is higher than the room temperature TR. Then, when the set temperature TSa after the setting change is larger than the room temperature TR (YES determination), the process proceeds to step S140, and it is determined that ventilation is performed in the “suppression mode”. On the other hand, when the set temperature TS after the setting change is equal to or lower than the room temperature TR (NO determination), the process proceeds to step S150, and it is determined that ventilation is performed in the “normal mode”.

  That is, when the setting temperature TS is changed and the setting temperature TSa after the setting change is larger than the setting temperature TSb before the setting and the setting temperature TSa after the setting change is larger than the room temperature TR, the “suppression mode” is set. Provide ventilation. The condition that “the set temperature TSa after the setting change is larger than the set temperature TSb before the setting” means that the heating load is increased. The condition that “the set temperature TSa after the setting change is larger than the room temperature TR” means that there is a heating load.

  By periodically executing such “ventilation setting processing”, a change in the heating load is grasped. When the heating load increases, the heating load of the air conditioner 1 is reduced by switching from the “normal mode” to the “ventilation suppression mode” and performing ventilation.

With reference to FIG. 4, the “ventilation setting process” executed by the control unit 43 during the cooling operation will be described.
The control unit 43 executes “ventilation setting processing” at a predetermined cycle during the cooling operation.

  In step S210, it is determined in the air conditioner 1 whether or not the set temperature TS has been changed by the remote controller 16. When the determination is affirmative (YES determination), that is, when it is determined that the setting temperature TS has been changed, the process proceeds to the next step S220. When a negative determination (NO determination) is made in this determination, the process proceeds to step S250, and a determination is made that ventilation is performed in the “normal mode”. At the time of the determination, the mode is maintained while the “normal mode” is being executed.

  In step S220, the set temperature TSb before the setting change and the set temperature TSa after the setting change are compared. When the set temperature TSa after the setting change is smaller than the set temperature TSb before the setting change (YES determination), the process proceeds to the next step S230. On the other hand, when the set temperature TSa after the setting change is equal to or higher than the set temperature TSb before the setting change (NO determination), the process proceeds to step S250, and a determination is made that ventilation is performed in the “normal mode”.

  In step S230, it is determined whether or not the set temperature TSa after the setting change is smaller than the room temperature TR. When the set temperature TSa after the setting change is smaller than the room temperature TR (YES determination), the process proceeds to step S240, and it is determined that ventilation is performed in the “suppression mode”. On the other hand, when the set temperature TSa after the setting change is equal to or higher than the room temperature TR (NO determination), the process proceeds to step S250 to determine that ventilation is performed in the “normal mode”.

  That is, when the setting temperature TS is changed, the setting temperature TSa after the setting change is smaller than the setting temperature TSb before the setting, and the setting temperature TSa after the setting change is smaller than the room temperature TR, the “suppression mode” is set. Provide ventilation. The condition that “the set temperature TSa after the setting change is smaller than the set temperature TSb before the setting” means an increase in the cooling load. The condition that “the set temperature TSa after the setting change is smaller than the room temperature TR” means that a cooling load exists.

  By periodically executing such “ventilation setting processing”, a change in the cooling load is grasped. When the cooling load increases, the cooling load of the air conditioner 1 is reduced by switching from the “normal mode” to the “ventilation suppression mode” and performing ventilation.

In the normal mode, the ventilation volume is maintained at a predetermined value larger than the reference ventilation volume X.
As for the ventilation amount in the normal mode, the ventilation amount may be set based on the carbon dioxide concentration. That is, the higher the carbon dioxide concentration, the larger the ventilation amount. Further, the ventilation amount in the normal mode may be set based on the temperature difference ΔTA between the set temperature TS and the room temperature TR. For example, in the heating operation, when the set temperature TS is higher than the room temperature TR, the ventilation amount is set to a larger value as the temperature difference ΔTA between the set temperature TS and the room temperature TR is larger. In the cooling operation, when the set temperature TS is lower than the room temperature TR, the ventilation amount is set to a larger value as the temperature difference ΔTA between the set temperature TS and the room temperature TR is smaller.

  The ventilation amount is set by controlling the rotation speeds of the supply fan 31 and the exhaust fan 32. When increasing the ventilation amount, both the rotation speeds of the air supply fan 31 and the exhaust fan 32 are increased. When reducing the ventilation amount, both the rotation speeds of the air supply fan 31 and the exhaust fan 32 are decreased.

With reference to FIG. 5, an example of the map for setting the ventilation amount used in the suppression mode during the heating operation will be described.
In the suppression mode, when the temperature difference ΔTX between the setting temperature TSa after the setting change and the setting temperature TSb before the setting change is less than the setting value T11, the ventilation amount is set to the “setting value L”. Further, when the temperature difference ΔTX between the set temperature TSa after the setting change and the set temperature TSb before the setting change is equal to or greater than the set value T11, the ventilation amount is set to “0”. That is, the ventilation volume is made smaller than the reference ventilation volume X in the suppression mode regardless of the magnitude of the temperature difference ΔTA between the set temperature TS and the room temperature TR.

With reference to FIG. 6, an example of a ventilation amount setting map used in the suppression mode during cooling operation will be described.
In the suppression mode, when the temperature difference ΔTX between the setting temperature TSa after the setting change and the setting temperature TSb before the setting change is larger than the setting value T12, the ventilation amount is set to the “setting value L”. Further, when the temperature difference ΔTX between the setting temperature TSa after the setting change and the setting temperature TSb before the setting change is equal to or less than the setting value T12, the ventilation amount is set to “0”. That is, the ventilation volume is made smaller than the reference ventilation volume X in the suppression mode regardless of the magnitude of the temperature difference ΔTA between the set temperature TS and the room temperature TR.

  According to the above map, during the heating operation, the ventilation amount is reduced based on the action of increasing the set temperature TS by changing the setting regardless of the temperature difference ΔTA between the set temperature TS and the room temperature TR. During the cooling operation, the ventilation amount is reduced based on the action of reducing the set temperature TS by changing the setting regardless of the temperature difference ΔTA between the set temperature TS and the room temperature TR. For this reason, since the ventilation is suppressed by the above action, the time required for the room temperature TR to approach the newly set temperature TS is shortened compared to the case where such ventilation suppression is not performed.

With reference to FIG. 7, an example of the map for setting a ventilation suppression period is demonstrated.
FIG. 7A shows a map used during the heating operation. In the suppression mode during the heating operation, the ventilation suppression period is lengthened as the temperature difference ΔTX between the setting temperature TSa after the setting change and the setting temperature TSb before the setting change is large. When the temperature difference ΔTX between the setting temperature TSa after the setting change and the setting temperature TSb before the setting change is negative, the ventilation device 2 performs ventilation in the normal mode. The ventilation suppression period when the temperature difference ΔTX between the set temperature TSa and the set temperature TSb before the setting change is negative is not set.

  For example, as shown in FIG. 7A, when the temperature difference ΔTX is greater than “0” and equal to or less than a value T21, the ventilation suppression period is set to the period P1. When the temperature difference ΔTX is greater than T21 and less than or equal to value T22, the ventilation suppression period is set to the period P2. When the temperature difference ΔTX is greater than T22 and less than or equal to value T23, the ventilation suppression period is set to the period P3. When the temperature difference ΔTX is greater than T23 and less than or equal to value T24, the ventilation suppression period is set to the period P4. When the temperature difference ΔTX is greater than T24 and less than or equal to value T25, the ventilation suppression period is set to the period P5.

FIG. 7B shows a map used during the cooling operation.
In the suppression mode during the cooling operation, the ventilation suppression period is lengthened as the temperature difference ΔTX between the setting temperature TSa after the setting change and the setting temperature TSb before the setting change is small. When the temperature difference ΔTX between the setting temperature TSa after the setting change and the setting temperature TSb before the setting change is positive, the ventilator 2 performs ventilation in the normal mode. The ventilation suppression period when the temperature difference ΔTX between the set temperature TSa and the set temperature TSb before the setting change is positive is not set.

  For example, as shown in FIG. 7B, when the temperature difference ΔTX is T35 or more and less than the value T34, the ventilation suppression period is set to the period P5. When the temperature difference ΔTX is equal to or greater than T34 and less than the value T33, the ventilation suppression period is set to the period P4. When the temperature difference ΔTX is equal to or greater than T33 and less than the value T32, the ventilation suppression period is set to the period P3. When the temperature difference ΔTX is equal to or greater than T32 and less than the value T31, the ventilation suppression period is set to the period P2. When the temperature difference ΔTX is equal to or greater than T31 and less than “0”, the ventilation suppression period is set to the period P1.

That is, as the heating load or the cooling load increases by changing the setting of the set temperature TS, the ventilation suppression period is lengthened.
By the way, it is also possible to set the ventilation suppression period uniformly regardless of whether the increase width of the heating load or the cooling load is large. However, in this case, the ventilation suppression period becomes longer or shorter than necessary. If the ventilation suppression period is longer than necessary, ventilation may be insufficient. When the ventilation suppression period is shorter than necessary, the load of the air conditioner 1 increases at the end of the ventilation suppression period, and the time until the room temperature TR approaches the set temperature TS becomes longer. Therefore, the ventilation suppression period is adjusted according to the heating load (or cooling load) of the air conditioner 1 by changing the setting of the set temperature TS. Thereby, it is suppressed that ventilation becomes insufficient or the time until the room temperature TR approaches the set temperature TS becomes long.

  With reference to FIG. 8, the effect | action of ventilation suppression performed based on the setting change of preset temperature TS is demonstrated. FIG. 8 shows changes over time in the room temperature TR, the set temperature TS, the temperature difference ΔTA between the set temperature TS and the room temperature TR, the ventilation amount, and the heating load during the heating operation. In FIG. 8, the solid line indicates the change of each parameter when the “ventilation setting process” according to the present embodiment is executed, and the alternate long and short dash line indicates the change of each parameter when the “ventilation setting process” is not executed. .

Time t1 indicates the time when the user of the air conditioner 1 changes the setting temperature TS.
At this time, the ventilation amount is changed from “setting value H” to “setting value L” based on the setting change of the setting temperature TS. As a result, the heating load becomes smaller than when the ventilation amount is not changed. Ventilation by such setting (“suppression mode”) is continued until the time of the ventilation suppression period elapses from when the setting temperature TS is changed. Time t2 indicates the time when the suppression mode ends. Since ventilation is suppressed over the ventilation suppression period, the time required for the room temperature TR to approach the set temperature TS during that period is shorter than when such setting is not performed.

According to the air conditioning system of the present embodiment, the following effects are obtained.
(1) In the present embodiment, during the heating operation, when the setting temperature TS is set and changed to a temperature higher than the setting temperature TSb before the setting change and higher than the room temperature TR, the control unit 43 is based on the reference ventilation amount X. The ventilator 2 is operated so as to ventilate over a ventilation suppression period with a small ventilation amount (set value L).

  Further, during the cooling operation, when the setting temperature TS is changed to a temperature lower than the setting temperature TSb before the setting change and lower than the room temperature TR, the control unit 43 sets the ventilation amount (setting) smaller than the reference ventilation amount X. The ventilator 2 is operated so as to ventilate over the ventilation suppression period at the value L).

  Thereby, during the heating operation or the cooling operation of the air conditioner 1, it is possible to suppress the occurrence of an event such that the time until the room temperature TR approaches the set temperature TS due to the setting change can be suppressed.

  (2) In the present embodiment, during the heating operation, when the setting temperature TS is changed to a temperature higher than the setting temperature TSb before the setting change and higher than the room temperature TR, the control unit 43 sets the setting after the setting change. The ventilation suppression period is set to a longer time as the value obtained by subtracting the set temperature TSb before the setting change from the temperature TSa is larger. Further, during the cooling operation, when the setting temperature TS is changed to a temperature lower than the setting temperature TSb before the setting change and lower than the room temperature TR, the control unit 43 changes the setting temperature TSa after the setting change from the setting temperature TSa before the setting change. The ventilation suppression period is set to a longer time as the value obtained by subtracting the set temperature TSb is smaller.

  That is, during the heating operation of the air conditioner 1, the ventilation suppression period is lengthened as the heating load increases. During the cooling operation of the air conditioner 1, the ventilation suppression period is lengthened as the cooling load increases. Thereby, since the ventilation suppression period is set appropriately, it becomes possible to suppress insufficient ventilation as compared with the case where the ventilation suppression period is set to a uniformly long period regardless of the load.

(Second Embodiment)
With reference to FIG. 9, other embodiment of an air conditioning system is described.
The air conditioning system of the present embodiment is obtained by adding the following changes to the configuration of the first embodiment. That is, the air conditioning system of the first embodiment has one indoor unit 10, but the air conditioning system has a plurality of indoor units 10 for one ventilator 2. Hereinafter, this air conditioning system will be described. In addition, about the structure which is common in the said 1st Embodiment, the same code | symbol is attached | subjected and the description of a part of structure common to the said 1st Embodiment is abbreviate | omitted from FIG.

The air conditioning system includes an air conditioner 1 and a ventilation device 2.
The air conditioner 1 and the ventilation device 2 are provided for the region S partitioned by the side wall 51 and the ceiling wall 50. The air conditioner 1 adjusts the temperature of the region S, and the ventilator 2 performs ventilation of the region S. The air conditioner 1 includes a plurality of indoor units 10 and outdoor units 20 connected to the indoor units 10.

  Each of the indoor units 10 has a remote controller 16 for setting the set temperature TS. Therefore, each indoor unit 10 performs air conditioning of the area S independently.

The communication device 42 includes a control unit 43 that performs communication control, and a communication line 44 that connects the control unit 43 and the ventilation control device 36 of the ventilation device 2.
The communication device 42 controls information exchange performed between the indoor unit 10 and the ventilation device 2.

  The control part 43 acquires the setting information and temperature information output from the air conditioner 1, and performs a predetermined determination based on these information. And based on this determination, the control signal for controlling the ventilator 2 is formed, and this control signal is transmitted to the ventilator 2.

The control unit 43 operates as follows.
At each predetermined cycle, the control unit 43 sends a preset temperature at the start of the predetermined cycle (hereinafter referred to as “start set temperature TSs”) and a set temperature at the end of the predetermined cycle (hereinafter referred to as “end set temperature”) from each indoor unit 10. TSe ") is acquired and set in the storage unit in the control unit 43. Then, a value obtained by subtracting the initial set temperature TSs from the final set temperature TSe is obtained, and this value is stored as the set temperature change amount ΔTY. Moreover, room temperature TR is acquired from each of the indoor units 10, and the average of these room temperature TR is calculated as average room temperature TRa. The initial set temperature TSs, the final set temperature TSe, the set temperature change amount ΔTY, and the average room temperature TRa are obtained for each of the indoor units 10.

During the heating operation, as shown below, the control unit 43 controls the ventilator 2 based on the set temperature change amount ΔTY obtained for each indoor unit 10.
First, it is determined whether or not the total sum of the set temperature change amounts ΔTY for each of the indoor units 10 is larger than the first determination value (positive value). When it is determined that the sum of the set temperature change amounts ΔTY for each of the indoor units 10 is larger than the first determination value (positive value), a positive determination is output. When the sum of the set temperature change amounts ΔTY for each of these indoor units 10 is equal to or less than the first determination value (positive value), a negative determination is output.

  Second, it is determined whether or not the average value of the final set temperature TSe is higher than the average room temperature TRa. Then, when it is determined that the average value of the final set temperature TSe in the predetermined cycle is higher than the average room temperature TRa, an affirmative determination is output. When determining that the average value of the final set temperature TSe is equal to or less than the average room temperature TRa, a negative determination is output.

  And when both affirmative determination is carried out in the 1st and 2nd determination, the control part 43 makes the ventilation apparatus 2 ventilate over the ventilation suppression period with the ventilation volume (setting value L) smaller than the reference | standard ventilation volume X. FIG. Make it work. As for the ventilation suppression period, the ventilation suppression period is set to a longer time as the set temperature change amount ΔTY is larger.

During the cooling operation, as shown below, the control unit 43 controls the ventilation device 2 based on the set temperature change amount ΔTY obtained for each indoor unit 10.
First, it is determined whether or not the sum of the set temperature change amounts ΔTY for each of the indoor units 10 is smaller than the second determination value (negative value). When it is determined that the sum of the set temperature change amounts ΔTY for each of the indoor units 10 is smaller than the second determination value (negative value), a positive determination is output. When the sum of the set temperature change amounts ΔTY for each of the indoor units 10 is equal to or greater than the second determination value (negative value), a negative determination is output.

  Second, it is determined whether or not the average value of the final set temperature TSe is lower than the average room temperature TRa. And when it determines with the average value of the end set temperature TSe of a predetermined period being lower than average room temperature TRa, affirmation determination is output. When it is determined that the average value of the final set temperature TSe is equal to or higher than the average room temperature TRa, a negative determination is output.

  And when both affirmative determination is carried out in the 1st and 2nd determination, the control part 43 makes the ventilation apparatus 2 ventilate over the ventilation suppression period with the ventilation volume (setting value L) smaller than the reference | standard ventilation volume X. FIG. Make it work. As for the ventilation suppression period, the ventilation suppression period is set to a longer time as the set temperature change amount ΔTY is smaller.

The operation of the air conditioning system according to the present embodiment will be described.
Since each of the indoor units 10 operates independently, one of the indoor units 10 that is linked to the ventilator 2 is selected, and the selected indoor unit 10 and the ventilator 2 are linked to suppress ventilation. Can be executed. However, there are times when the ventilation suppression effect does not occur.

  Therefore, as described above, it is determined whether or not to suppress the ventilation amount based on the average value of the set temperature change amount ΔTY and the final set temperature TSe. As a result, it is possible to appropriately determine whether or not the air conditioning load generated in various magnitudes is excessive by changing the setting of the set temperature TS independently in each remote controller 16. Thereby, the ventilation suppression effect can be produced in the air conditioning system having a plurality of indoor units 10.

According to the air conditioning system of the present embodiment, the following effects are obtained.
(1) In the present embodiment, for each indoor unit 10, a value obtained by subtracting the initial set temperature TSs from the final set temperature TSe of the predetermined cycle is set as the set temperature change amount ΔTY for each indoor unit 10. Then, based on the sum of the set temperature change amounts ΔTY and the average value of the final set temperature TSe, it is determined whether or not the ventilation amount is to be suppressed. Thereby, it is possible to increase the accuracy of suppressing the occurrence of an event such that the time until the room temperature TR approaches the set temperature TS due to the setting change of the set temperature TS is increased.

  (2) In the present embodiment, during the heating operation of the air conditioner 1, the ventilation suppression period is lengthened as the heating load increases. During the cooling operation of the air conditioner 1, the ventilation suppression period is lengthened as the cooling load increases. That is, since the ventilation suppression period is appropriately set according to the size of the heating load or the cooling load, the reduction of the ventilation amount is reduced as compared with the case where the ventilation suppression period is set uniformly long regardless of the load. be able to.

(Third embodiment)
With reference to FIG. 10, other embodiment of an air conditioning system is described.
The air conditioning system of the present embodiment is obtained by adding the following changes to the configuration of the second embodiment. That is, although the air conditioning system of 2nd Embodiment installs the several indoor unit 10 in the one area | region S, the air conditioning system of this embodiment is each of area | region S1, S2 partitioned by the wall. The indoor units 10 are installed one by one. Hereinafter, this air conditioning system will be described. In addition, about the structure which is common in the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The air conditioning system includes an air conditioner 1 and a ventilation device 2.
The air conditioner 1 and the ventilator 2 are provided for the regions S1 and S2 partitioned by the side wall 51 and the ceiling wall 50. The air conditioner 1 adjusts the temperature of the areas S1 and S2, and the ventilation device 2 ventilates the areas S1 and S2.

The communication device 42 controls information exchange performed between the plurality of indoor units 10 and the ventilation device 2.
The communication device 42 includes a control unit 43 that performs communication control, and a communication line 44 that connects the control unit 43 and the ventilation control device 36 of the ventilation device 2. The control unit 43 detects the presence / absence of a change in the set temperature TS for each of the indoor units 10 at predetermined intervals.

The controller 43 operates as follows during the heating operation.
First, it is determined whether or not the setting temperature TS of the indoor units 10 out of these indoor units 10 is changed to a temperature higher than the setting temperature TSb before the setting change in the same cycle. Second, it is determined whether or not the average value of the end set temperature TSe in a predetermined cycle is higher than the average value of the start set temperature TSs.

  And when both 1st and 2nd determination is affirmed determination, the control part 43 makes the ventilation apparatus 2 ventilate over the ventilation suppression period with the ventilation volume (setting value L) smaller than the reference | standard ventilation volume X. FIG. Make it work.

The control unit 43 operates as follows during the cooling operation.
First, it is determined whether or not the setting temperature TS of the indoor units 10 out of these indoor units 10 is changed to a temperature lower than the setting temperature TSb before the setting change in the same cycle. Second, it is determined whether or not the average value of the end set temperature TSe in a predetermined cycle is lower than the average value of the start set temperature TSs.

  And when both 1st and 2nd determination is affirmed determination, the control part 43 makes the ventilation apparatus 2 ventilate over the ventilation suppression period with the ventilation volume (setting value L) smaller than the reference | standard ventilation volume X. FIG. Make it work.

The operation of the air conditioning system according to the present embodiment is as follows.
In this air conditioning system, the presence or absence of a change in the set temperature TS is detected for each of the indoor units 10 at predetermined intervals, and the set temperature TS is set in the same period for more than half of the indoor units 10 among the indoor units 10. It is determined whether or not ventilation is to be suppressed based on the setting being changed to a temperature (or a lower temperature) higher than the set temperature TSb before the change. In such a method, it is appropriately determined whether or not the air conditioning load is excessive with respect to the air conditioning load generated in various sizes by changing the setting of the set temperature TS independently in each indoor unit 10. Can do.

According to the air conditioning system of the present embodiment, the following effects are obtained.
(1) According to the above configuration, whether or not the air conditioning load is excessive with respect to the air conditioning load generated in various sizes by changing the setting of the set temperature TS independently in each indoor unit 10 is appropriately determined. Can be determined. For this reason, it is possible to increase the accuracy of suppressing the occurrence of an event such as the time until the room temperature TR approaches the set temperature TS due to the change in the set temperature TS.

(Modification)
In addition, the embodiment of the present technology is not limited to the above-described embodiment, and can be implemented by changing it as shown below, for example. The following modifications are not applied only to the above embodiments, and different modifications can be combined with each other.

  -In said 3rd Embodiment, the number which makes setting temperature TS higher or lower than setting temperature TSb before setting change among a plurality of indoor units 10 is calculated | required, and ventilation suppression control is performed when this number is more than half. Although executed, this technique can also be applied to the air conditioning system described in the second embodiment. In the second embodiment, the set temperature change amount ΔTY is obtained in the plurality of indoor units 10. And it is determined whether ventilation suppression is performed based on whether the sum total of these setting temperature variation | change_quantity (DELTA) TY is larger than a determination value (1st determination value or 2nd determination value). You may apply to the air conditioning system as described in 3 embodiment.

  In the first embodiment, when the ventilation is suppressed, that is, when the ventilation is performed in the suppression mode, the maps shown in FIGS. 5 and 6 are used, but the setting of the ventilation amount in the suppression mode is not limited to this. For example, when it is determined that ventilation is to be suppressed, control for stopping ventilation may be performed. In addition, control for stopping the supply of outdoor air and exhausting the indoor air (control for setting the negative pressure in the room) may be performed. Also by such control, the effect (1) of the first embodiment can be obtained.

  -In each above-mentioned embodiment, although control part 43 is provided in ventilator 2, arrangement of control part 43 is not limited to this. That is, the control part 43 should just exist in an air conditioning system. For example, it may be provided in the indoor unit 10 or the outdoor unit 20.

  In each of the above embodiments, when ventilation is performed in the suppression mode, the restriction of the ventilation suppression control is not particularly mentioned, but control for prohibiting the suppression mode can also be performed. For example, when the output value of the carbon dioxide sensor 35 is high, ventilation may be promoted regardless of the suppression mode or the normal mode. In this case, an increase in the carbon dioxide concentration in the region S can be suppressed.

  In each of the above embodiments, the same value is used for the reference ventilation amount X for determining whether to execute the suppression mode in each of the heating operation and the cooling operation, but a different value in each operation Is preferably used. Moreover, it is preferable to set the value of the reference ventilation amount X for each model of the air conditioning system.

  DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2 ... Ventilator, 10 ... Indoor unit, 11 ... Expansion valve, 12 ... Indoor side heat exchanger, 13 ... Indoor fan, 14 ... Temperature sensor, 15 ... Indoor unit control apparatus, 16 ... Remote controller , 17, housing, 17 a, suction port, 17 b, outlet, 20, outdoor unit, 21, compressor, 22, outdoor heat exchanger, 23, outdoor fan, 24, four-way switching valve, 25, outdoor unit Control device, 26 ... oil separator, 27 ... housing, 30 ... total heat exchanger, 31 ... air supply fan, 32 ... exhaust fan, 33 ... housing, 33a ... outside air inlet, 33b ... outside air inlet, 33c ... Inside air suction port, 33d ... Inside air exhaust port, 34a ... Outside air suction tube, 34b ... Supply tube, 34c ... Inside air suction tube, 34d ... Exhaust tube, 35 ... Carbon dioxide sensor, 36 ... Ventilation control device, 41 ... Refrigerant piping 42. Communication device, 4 ... control unit, 44 ... communication line, 50 ... ceiling wall 51 ... side wall.

Claims (5)

An air conditioner (1) that adjusts the room temperature based on a set temperature (TS), a ventilator (2) that exchanges indoor air and outdoor air through a total heat exchanger (30), and the air conditioner (1) In an air conditioning system comprising a control unit (43) for linking the operation of the ventilation device (2) with the operation of
During heating operation, when the setting temperature (TS) is set to a temperature higher than the setting temperature (TSb) before the setting change and higher than the room temperature, the control unit (43), the reference ventilation (X) Operate the ventilator (2) to ventilate with a smaller ventilation volume over the ventilation suppression period,
During cooling operation, when the setting temperature (TS) is set to a temperature lower than the setting temperature (TSb) before the setting change and lower than the room temperature, the control unit (43), the reference ventilation (X) The air conditioning system is characterized in that the ventilator (2) is operated so as to ventilate with a smaller ventilation volume over a ventilation suppression period. The air conditioning system according to claim 1,
During heating operation, when the setting temperature (TS) is set to a temperature higher than the setting temperature (TSb) before the setting change and higher than the room temperature, the control unit (43), the setting after the setting change The larger the value obtained by subtracting the set temperature (TSb) before the setting change from the temperature (TSa), the longer the ventilation suppression period is set,
During cooling operation, when the setting temperature (TS) is set to a temperature lower than the setting temperature (TSb) before the setting change and lower than the room temperature, the control unit (43), the setting after the setting change The air conditioning system, wherein the ventilation suppression period is set to a longer time as the value obtained by subtracting the set temperature (TSb) before the setting change from the temperature (TSa) is smaller. An air conditioner (1) that adjusts the room temperature based on the set temperature (TS), a ventilator (2) that exchanges indoor air and outdoor air through a total heat exchanger, and the air conditioner (1) In an air conditioning system comprising a control unit (43) for linking the operation of the ventilation device (2) with the operation of
The air conditioner (1) includes a plurality of indoor units (10) and at least one outdoor unit (20). Each of the remote controllers (16) provided in the indoor unit (10) The setting temperature (TS) can be set,
The control unit (43) sets the set temperature at the start of a predetermined cycle as a start set temperature (TSs) for each of the indoor units (10) every predetermined cycle, and sets the set temperature at the end of a predetermined cycle. Is set as an end set temperature (TSe), a value obtained by subtracting the start set temperature (TSs) from the end set temperature (TSe) is set as a set temperature change amount (ΔTY), and the indoor unit (10 ) Is calculated as the average room temperature (TRa) for the room temperature detected by each
During the heating operation, the sum of the set temperature changes (ΔTY) of each of the indoor units (10) is larger than the first determination value, and the average value of the final set temperature (TSe) is greater than the average room temperature (TRa). The control unit (43) operates the ventilator (2) to ventilate over a ventilation suppression period with a ventilation volume smaller than a reference ventilation volume (X),
During the cooling operation, the sum of the set temperature changes (ΔTY) of each of the indoor units (10) is smaller than the second judgment value, and the average value of the final set temperature (TSe) is greater than the average room temperature (TRa). The air conditioning system is characterized in that the control unit (43) operates the ventilator (2) so as to ventilate for a ventilation suppression period with a ventilation volume smaller than a reference ventilation volume (X). . The air conditioning system according to claim 3,
During the heating operation, the sum of the set temperature changes (ΔTY) of the indoor units (10) is larger than the first determination value, and the average value of the final set temperature (TSe) is the average room temperature (TRa). Is higher, the greater the sum of the set temperature change (ΔTY), the longer the ventilation suppression period,
During the cooling operation, the sum of the set temperature changes (ΔTY) of each of the indoor units (10) is smaller than the second determination value, and the average value of the final set temperature (TSe) is the average room temperature (TRa). The air conditioning system is characterized in that the ventilation suppression period is set to a longer time as the total sum of the set temperature changes (ΔTY) is smaller. Multiple air conditioners (1) that adjust the room temperature based on the set temperature (TS), one ventilator (2) that exchanges indoor air and outdoor air through a total heat exchanger, and the air conditioner In an air conditioning system including a control unit (43) that links the operation of (1) and the operation of the ventilation device (2),
The air conditioner (1) includes a plurality of indoor units (10) and at least one outdoor unit (20). Each of the remote controllers (16) provided in the indoor unit (10) The setting temperature (TS) can be set,
The control unit (43) sets the set temperature at the start of a predetermined cycle as a start set temperature (TSs) for each of the indoor units (10) every predetermined cycle, and sets the set temperature at the end of a predetermined cycle. Is set as the final set temperature (TSe), and the control unit (43) detects the presence or absence of a change in the set temperature (TS) for each of the indoor units (10) at predetermined intervals. Is what
During heating operation, about half of the indoor units (10) among these indoor units (10), the set temperature (TS) is set to a temperature higher than the set temperature (TSb) before the setting change in the same cycle. And when the average value of the end set temperature (TSe) is higher than the average value of the start set temperature (TSs), so as to ventilate over a ventilation suppression period with a ventilation volume smaller than the reference ventilation volume (X), Operating the ventilator (2),
During cooling operation, for the indoor units (10), more than half of these indoor units (10), the setting temperature (TS) is set to a temperature lower than the setting temperature (TSb) before the setting change in the same cycle. And when the average value of the end set temperature (TSe) is lower than the average value of the start set temperature (TSs), ventilation is performed over a ventilation suppression period with a ventilation volume smaller than the reference ventilation volume (X). An air conditioning system characterized by operating the ventilation device (2).