Air Conditioning System

Abstract

To provide an air conditioning system that can restrain a reduction in an improvement effect of a thermal environment and improve comfort of a user.SOLUTION: An air conditioning system is installed in a building comprising a first space, a second space, and a third space communicating with the first space and the second space, and comprises: an air conditioning device installed in the first space, and for heating or cooling the first space; an air supply device installed in the first space, and for making outdoor air flow into the first space; a first air exhaust device installed in the second space, and for exhausting air in the second space to the outdoors; an air blowing device provided in an air passage connecting the first space and the third space, and for sending air in the first space to the third space; and a control device for coordinating and controlling the air blowing device and the first air exhaust device.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to an air conditioning system that provides air conditioning and ventilation within a building. [Background technology]

[0002] Conventionally, in an air conditioning system that performs air conditioning and ventilation in a building such as a house, it is known that the thermal environment in the building is improved by sending air from an air-conditioned space where an air conditioner is installed to a non-air-conditioned space where no air conditioner is installed. For example, Patent Document 1 discloses an air conditioning system that uses a duct fan to send air from a living room, which is an air-conditioned space, to a dressing room, which is a non-air-conditioned space. The air conditioning system of Patent Document 1 is configured to efficiently heat multiple spaces by controlling the duct fan based on the heating capacity of the heating device and the need for heating in the non-air-conditioned space. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-185743 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, when an exhaust device is installed in a changing room or a bathroom connected to the changing room, the conditioned air sent from a living room to the changing room is exhausted to the outdoors by the exhaust device, as in the air conditioning system of Patent Document 1. In this case, depending on the exhaust air volume of the exhaust device, this can lead to an increase in the air conditioning load in the living room, and the effect of improving the thermal environment in the building can be reduced, resulting in a decrease in comfort for users.

[0005] The present disclosure is devised to solve the above-mentioned problems, and aims to provide an air conditioning system that can suppress a decrease in the effect of improving the thermal environment and improve the comfort of users. [Means for solving the problem]

[0006] The air conditioning system according to the present disclosure is an air conditioning system installed in a building having a first space, a second space, and a third space communicating with the first space and the second space, and includes an air conditioner installed in the first space for heating or cooling the first space, an air supply device installed in the first space for introducing outside air into the first space, a first exhaust device installed in the second space for discharging air from the second space to the outdoors, and a blower provided in an air duct connecting the first space and the third space for sending air from the first space to the third space; The pressure in the third space is greater than the pressure in the first space. and a control device that controls the blower device and the first exhaust device in cooperation with each other. Effect of the Invention

[0007] According to the air conditioning system of the present disclosure, by controlling the blower device and the first exhaust device in coordination with each other, it is possible to suppress a decrease in the effect of improving the thermal environment and improve the comfort of the user. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic configuration diagram of an air conditioning system according to a first embodiment. [Diagram 2] 2 is a schematic cross-sectional view of a building in which an air-conditioning system according to a first embodiment is installed, taken along line AA in FIG. [Diagram 3] 2 is a schematic cross-sectional view of a building in which an air-conditioning system according to a first embodiment is installed, taken along line BB in FIG. [Figure 4] FIG. 2 is a control block diagram of the air conditioning system according to the first embodiment. [Diagram 5] FIG. 11 is a diagram showing the air flow when the blower is stopped. [Figure 6] 4 is a flowchart showing a flow of cooperative control in the air conditioning system according to the first embodiment. [Figure 7] FIG. 4 is a diagram showing an air flow when cooperative control is being performed in the first embodiment. [Figure 8]10 is a flowchart showing a flow of cooperative control in an air conditioning system according to the second embodiment. [Figure 9] FIG. 11 is a schematic configuration diagram of an air conditioning system according to a third embodiment. [Figure 10] FIG. 11 is a control block diagram of an air conditioning system according to a third embodiment. [Figure 11] 11 is a diagram illustrating the exhaust air volume of the first exhaust device when a person is present in the second space. FIG. [Figure 12] 13 is a diagram illustrating the exhaust air volume of the first exhaust device when no one is present in the second space. FIG. [Figure 13] 11 is a flowchart showing a flow of cooperative control in an air conditioning system according to the third embodiment. [Figure 14] FIG. 11 is a schematic configuration diagram of an air conditioning system according to a fourth embodiment. [Figure 15] FIG. 11 is a control block diagram of an air conditioning system according to a fourth embodiment. [Figure 16] 10 is a flowchart showing the flow of cooperative control in an air conditioning system according to the fourth embodiment. [Figure 17] 13 is a diagram illustrating the exhaust air volume when a person is present in the second space. FIG. [Figure 18] 13 is a diagram illustrating the exhaust air volume when no one is present in the second space. FIG. [Figure 19] 13 is a flowchart showing the flow of cooperative control in an air conditioning system according to the fifth embodiment. [Figure 20] FIG. 4 is a control block diagram of an air conditioning system according to a first modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will be omitted or simplified as appropriate. In addition, the shape, size, arrangement, etc. of the configurations shown in each drawing may be changed as appropriate within the scope of the present disclosure.

[0010] Embodiment 1 FIG. 1 is a schematic configuration diagram of an air conditioning system 100 according to a first embodiment. The air conditioning system 100 according to the first embodiment is installed in a building 200 such as a house. FIG. 1 shows a plan view of the building 200 and each configuration of the air conditioning system 100 installed in the building 200. FIG. 2 is a schematic cross-sectional view of the building 200 in which the air conditioning system 100 according to the first embodiment is installed, taken along line AA in FIG. 1. FIG. 3 is a schematic cross-sectional view of the building 200 in which the air conditioning system 100 according to the first embodiment is installed, taken along line BB in FIG. The configuration and arrangement of the air conditioning system 100 according to the present embodiment will be described with reference to FIGS. 1 to 3.

[0011] The air conditioning system 100 comprises an air conditioning unit 11 and an air supply unit 12 installed in a first space R1 of a building 200, a first exhaust unit 21 installed in a second space R2, a blower unit 41 installed in an air duct 4 connecting the first space R1 and a third space R3, and a control unit 5.

[0012] The first space R1 is, for example, a living room. The first space R1 is adjacent to the third space R3, and a living room door 10 is provided between the first space R1 and the third space R3. As shown in FIG. 2, the air conditioner 11 is installed on the wall of the first space R1. The air conditioner 11 may be installed on the ceiling of the first space R1 or may be a floor-standing type. The air conditioner 11 includes a refrigerant circuit including a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger, and performs heating or cooling of the first space R1. The air conditioning capacity of the air conditioner 11 is controlled by a control unit (not shown) of the air conditioner 11 by changing the operating frequency of the compressor, the air volume of the outdoor fan that sends air to the outdoor heat exchanger, and the air volume of the indoor fan that supplies air to the outdoor heat exchanger.

[0013] 2, the air supply device 12 is provided on a wall of the first space R1. The air supply device 12 is an air supply port that allows outside air to flow into the first space R1. The air supply device 12 may also include an air supply fan for drawing the outside air into the first space R1.

[0014] The second space R2 is, for example, a changing room. The second space R2 is adjacent to the third space R3, and a changing room door 20 is provided between the second space R2 and the third space R3. As shown in FIG. 3, the first exhaust device 21 is installed on the wall of the second space R2. The first exhaust device 21 is an exhaust fan equipped with an inverter, and the rotation speed is variably controlled to control the exhaust air volume from the second space R2.

[0015] The third space R3 is, for example, an entrance. The third space R3 is adjacent to the first space R1 and the second space R2 and communicates with the first space R1 and the second space R2. The third space R3 is provided with an entrance door 30 that communicates with the outside.

[0016] As shown in Fig. 1 and Fig. 2, air passage 4 formed by a duct is provided in the ceiling of first space R1 and third space R3. An intake port 42 of air passage 4 is provided in the ceiling of first space R1, and an outlet port 43 of air passage 4 is provided in the ceiling of third space R3. Air blower 41 is installed in air passage 4 and is a blower fan that transports air from first space R1 to third space R3. The amount of air blown by air blower 41 may be fixed or variable.

[0017] The arrangement of the first space R1, the second space R2, and the third space R3 in the building 200 is not limited to the example in Figures 1 to 3, and the arrangement may be arbitrary as long as each space communicates with each other. Here, "communicating" means that air can flow through gaps between the doors or through vents provided in the doors or walls not only when the living room door 10 and the dressing room door 20 are open, but also when the doors are closed.

[0018] The control device 5 is wirelessly connected to the air conditioning device 11, the first exhaust device 21, and the blower device 41, and controls the operation of the blower device 41 and the first exhaust device 21. The control device 5 is, for example, an information communication terminal such as a smartphone equipped with a CPU and a memory.

[0019] Fig. 4 is a control block diagram of the air conditioning system 100 according to the first embodiment. As shown in Fig. 4, the control device 5 has an information acquisition unit 51, an air blowing control unit 52, and an exhaust control unit 53. The information acquisition unit 51, the air blowing control unit 52, and the exhaust control unit 53 are functional units that are realized by the CPU of the control device 5 executing a program. Alternatively, at least any one of the information acquisition unit 51, the air blowing control unit 52, and the exhaust control unit 53 may be realized by a processing circuit such as an ASIC or an FPGA.

[0020] The information acquisition unit 51 acquires operation information from the air conditioner 11. The operation information of the air conditioner 11 is information about the operation mode of the air conditioner 11, such as operation, stop, cooling or heating, and the operation state, such as continuous operation or intermittent operation. Continuous operation is a state in which the compressor of the air conditioner 11 operates continuously, and intermittent operation is a state in which the compressor is intermittently operated and stopped when the air conditioning load is low. The information acquisition unit 51 acquires operation information from the air conditioner 11 periodically (for example, every few minutes) and outputs it to the air blow control unit 52.

[0021] The air blowing control unit 52 controls the operation, stopping, and air blowing volume of the air blowing device 41 during operation based on the operation information of the air conditioning device 11 acquired by the information acquisition unit 51. The air blowing volume of the air blowing device 41 is set to an air volume that satisfies the ventilation rate of 0.5 times / h in the building 200, for example.

[0022] The exhaust control unit 53 controls the exhaust air volume of the first exhaust device 21 based on the settings by the user, the operating state of the blower device 41, and the air volume of the blower device 41. The exhaust control of the first exhaust device 21 by the exhaust control unit 53 will be described below.

[0023] FIG. 5 is a diagram showing the air flow when the blower 41 is stopped. In FIG. 5, the air conditioner 11 and the first exhaust device 21 are operating, and the air flow when the blower 41 is stopped is shown by dotted lines and arrows. As shown in FIG. 5, first, outside air flows into the first space R1 through the air supply device 12, and the air in the first space R1 is heated or cooled by the air conditioner 11. The air in the first space R1 flows into the third space R3 through a gap or a vent in the living room door 10. Then, the air that has flowed into the third space R3 flows into the second space R2 through a gap or a vent in the undressing room door 20, and is discharged to the outdoors from the first exhaust device 21.

[0024] Here, when the air conditioning device 11 and the first exhaust device 21 are driven and the blower device 41 is stopped, the relationship between the pressure P1 in the first space R1, the pressure P2 in the second space R2, and the pressure P3 in the third space R3 is P1>P3>P2. The pressure P1 in the first space R1 into which outside air flows through the air supply device 12 is approximately the same as the atmospheric pressure, so the pressure P3 is lower than the atmospheric pressure. Therefore, outside air flows into the third space R3 through a gap in the entrance door 30 or a vent. As a result, the temperature of the third space R3 changes depending on the outside air temperature, and air hazardous substances such as pollen or PM2.5 enter the third space R3, reducing the comfort of users in the building 200.

[0025] Moreover, even when the blower 41 is operated, if the blowing volume of the blower 41 is equal to or less than the exhaust volume of the first exhaust device 21, the relationship of the pressures P1 to P3 in the first space R1 to the third space R3 becomes P1>P3>P2, resulting in the air flow shown in Fig. 5. In this case as well, outside air flows into the third space R3 through a gap in the entrance door 30 or a vent, so that the effect of improving the thermal environment by blowing air from the first space R1 to the third space R3 is reduced, and the comfort of users in the building 200 is also reduced.

[0026] Therefore, the air conditioning system 100 controls the blower 41 and the first exhaust device 21 in cooperation with each other so that the pressure P3 in the third space R3 is greater than the pressure P1 in the first space R1. Specifically, when the blower 41 is operating, the exhaust control unit 53 controls the exhaust air volume of the first exhaust device 21 to be smaller than the air volume of the blower 41. This makes it possible to make the pressure P3 in the third space R3 greater than the pressure P1 in the first space R1. More specifically, the relationship between the pressures P1 to P3 in the first space R1 to the third space R3 can be set to P3>P1>P2. This makes the pressure P3 in the third space R3 greater than the atmospheric pressure, thereby suppressing the inflow of outside air into the third space R3 from the gap in the entrance door 30 or the vent.

[0027] Fig. 6 is a flowchart showing the flow of cooperative control in the air conditioning system 100 according to the first embodiment. The flow in Fig. 6 is executed by the control device 5. At the start of this flow, the blower 41 is stopped, and the first exhaust device 21 is operating at an arbitrary air volume set by the user. Then, first, the information acquisition unit 51 of the control device 5 acquires operation information of the air conditioning device 11 (S1).

[0028] The operation of the air conditioner 11 is started by a user operating a remote controller (not shown) etc. The air conditioner 11 performs cooling operation or heating operation so that the temperature of the first space R1 becomes the set temperature set by the user.

[0029] The airflow control unit 52 of the control device 5 judges whether or not the condition for starting airflow of the air blower 41 is satisfied based on the operation information acquired by the information acquisition unit 51 (S2). Here, the condition for starting airflow is that the air conditioning device 11 has a margin in its air conditioning capacity, in other words, that the air conditioning load in the first space R1 is small. This is because if the air conditioning device 11 has no margin in its air conditioning capacity and sends air to the third space R3, the first space R1 cannot be sufficiently heated or cooled, and the comfort of the users in the first space R1 will decrease. Specifically, the start condition is either the following condition (A) or condition (B). (A) A preset first time (e.g., 15 minutes) has elapsed since the air conditioning device 11 started operating. (B) The air conditioning unit 11 is operating intermittently.

[0030] If the start condition is not satisfied (S2: NO), the process waits until the start condition is satisfied. If the start condition is satisfied (S2: YES), the air blowing control unit 52 operates the air blowing device 41 to start blowing air from the first space R1 to the third space R3 (S3). At this time, the air blowing control unit 52 controls the rotation speed of the air blowing device 41 so that the air volume of the air blowing device 41 becomes a preset air volume.

[0031] After the blowing of air by the blower 41 starts, the exhaust control unit 53 judges whether the current exhaust air volume of the first exhaust device 21 is smaller than the air volume of the blower 41 (S4). If the exhaust air volume of the first exhaust device 21 is equal to or larger than the air volume of the blower 41 (S4: NO), the exhaust control unit 53 reduces the exhaust air volume of the first exhaust device 21 so that the exhaust air volume of the first exhaust device 21 is smaller than the air volume of the blower 41 (S5). On the other hand, if the exhaust air volume of the first exhaust device 21 is smaller than the air volume of the blower 41 (S4: YES), the exhaust control unit 53 increases the exhaust air volume of the first exhaust device 21 within a range in which the exhaust air volume of the first exhaust device 21 does not become equal to or larger than the air volume of the blower 41 (S6).

[0032] FIG. 7 is a diagram showing the air flow when the cooperative control in the first embodiment is performed. That is, FIG. 7 shows the air flow in a state where the air conditioner 11 and the blower 41 are operating, and the first exhaust device 21 is controlled so that the exhaust air volume of the first exhaust device 21 is smaller than the air volume of the blower 41. As shown in FIG. 7, first, outside air flows into the first space R1 through the air supply device 12, and the air in the first space R1 is heated or cooled by the air conditioner 11. The air in the first space R1 is blown into the third space R3 through the air passage 4 by the blower 41. Then, the air that has flowed into the third space R3 flows into the second space R2 through a gap or a vent in the dressing room door 20, and is discharged to the outdoors from the first exhaust device 21.

[0033] Here, since the exhaust air volume of the first exhaust device 21 is smaller than the blowing air volume of the blower 41, the relationship between the pressure P1 in the first space R1, the pressure P2 in the second space R2, and the pressure P3 in the third space R3 is P3>P1>P2. This suppresses the inflow of outside air into the third space R3 from the gap or the vent of the entrance door 30. As a result, the thermal environment of the third space R3 is improved by the blowing air from the first space R1, and the intrusion of harmful air substances into the third space R3 is suppressed, improving the comfort of the user.

[0034] In addition, since the pressure P3 in the third space R3 is greater than the pressure P1 in the first space R1, the air in the third space R3 flows into the first space R1 through the gap or the vent in the room door 10 and circulates. After the blower 41 starts blowing air into the third space R3, the exhaust air volume of the first exhaust device 21 is increased within a range that does not exceed the air volume of the blower 41, so that the air in the third space R3, whose thermal environment has been improved, flows into the second space R2. This increases the area in the building 200 where the conditioned air circulates, improving the thermal environment in the entire building 200.

[0035] Returning to FIG. 6, the airflow control unit 52 determines whether or not an end condition has been met (S7). Here, the end condition for airflow is that the effect of airflow from the first space R1 to the third space R3 has decreased. Specifically, the end condition is that the air conditioning device 11 has stopped, or that a preset second time (e.g., 10 minutes) has elapsed since the air conditioning device 11 stopped. By continuing to blow air from the first space R1, where air conditioning was performed by the air conditioning device 11, for a certain period of time even after the air conditioning device 11 has stopped, air circulation within the building 200 continues, and the thermal environment can be improved.

[0036] If the termination condition is not satisfied (S7: NO), the air blowing continues until the termination condition is satisfied. If the termination condition is satisfied (S7: YES), the air blowing control unit 52 stops the air blowing device 41 (S8). When the air blowing by the air blowing device 41 is stopped, the exhaust control unit 53 returns the exhaust air volume of the first exhaust device 21 to the air volume before the operation of the air blowing device 41 started (S9).

[0037] It should be noted that the first exhaust device 21 may be stopped when the cooperative control in this flow starts. In this case, when the operation of the blower device 41 starts, in step S6, the exhaust control unit 53 starts the operation of the first exhaust device 21. At this time, the exhaust air volume of the first exhaust device 21 is set to an air volume that is not greater than the air volume of the blower device 41.

[0038] As described above, in the air conditioning system 100 of the present embodiment, the air volume of the first exhaust device 21 is controlled in coordination with the start of operation of the blower device 41, so that the pressure P3 in the third space R3 can be made higher than the pressure P1 in the first space R1. This makes it possible to suppress the inflow of outside air and to form a circulating airflow within the building 200. As a result, the deterioration of the improvement effect of the thermal environment in the building 200 is suppressed, and the comfort of users can be improved.

[0039] Embodiment 2 An air conditioning system 100 according to the second embodiment will be described. The air conditioning system 100 according to the second embodiment differs from the first embodiment in the coordinated control of the blower 41 and the first exhaust device 21. The configuration of the air conditioning system 100 is the same as that of the first embodiment. However, the blower 41 according to the present embodiment is a blower fan equipped with an inverter, and the rotation speed is variably controlled to control the amount of air blown from the first space R1 to the third space R3.

[0040] The air blowing control unit 52 of this embodiment controls the operation, stop, and air blowing volume during operation of the air blowing device 41 based on the operation information of the air conditioning device 11 and the exhaust air volume of the first exhaust device 21 acquired by the information acquisition unit 51. Specifically, the air blowing control unit 52 controls the air blowing volume of the air blowing device 41 so that it is greater than the exhaust air volume of the first exhaust device 21. As a result, when the air blowing device 41 is operating, the relationship between the pressure P1 in the first space R1, the pressure P2 in the second space R2, and the pressure P3 in the third space R3 can be set to P3>P1>P2.

[0041] Furthermore, the exhaust control unit 53 controls the exhaust air volume of the first exhaust device 21 based on the user's settings, the operating state of the blower device 41, and the current season. As an example, the exhaust control unit 53 switches the exhaust air volume of the first exhaust device 21 to either "strong" or "weak." A "strong" exhaust air volume is, for example, an air volume that satisfies a ventilation rate of 0.5 times / h in the building 200. A "weak" exhaust air volume is, for example, an air volume that satisfies a ventilation rate of 0.25 times / h in the building 200.

[0042] When the blower 41 is operating, the exhaust control unit 53 switches the exhaust air volume of the first exhaust device 21 to "strong" or "weak" depending on the season. Specifically, the exhaust control unit 53 sets the exhaust air volume of the first exhaust device 21 to "weak" in winter, and sets the exhaust air volume of the first exhaust device 21 to "strong" in seasons other than winter. That is, when the current season is winter, the exhaust control unit 53 reduces the exhaust air volume of the first exhaust device 21 to be lower than the exhaust air volume in seasons other than winter. In winter, when ventilation by natural ventilation is expected, the ventilation air volume can be suppressed. Therefore, in winter, the exhaust air volume of the first exhaust device 21 can be set to "weak."

[0043] Fig. 8 is a flowchart showing the flow of cooperative control in the air conditioning system 100 according to the second embodiment. The flow in Fig. 8 is executed by the control device 5. At the start of this flow, the blower device 41 is stopped, and the first exhaust device 21 is operating at an arbitrary air volume set by the user. First, the information acquisition unit 51 of the control device 5 acquires operation information of the air conditioner 11 (S11). The air conditioner 11 operates in the same manner as in the first embodiment.

[0044] Then, the air blowing control unit 52 of the control device 5 determines whether or not the start condition for the air blowing device 41 is satisfied based on the operation information acquired by the information acquisition unit 51 (S12). The start condition for air blowing is the same as that in the first embodiment. If the start condition is not satisfied (S12: NO), the control unit 52 waits until the start condition is satisfied. If the start condition is satisfied (S12: YES), the air blowing control unit 52 operates the air blowing device 41 to start blowing air from the first space R1 to the third space R3 (S13).

[0045] At this time, the air blowing control unit 52 controls the rotation speed of the air blowing device 41 so that the air blowing volume of the air blowing device 41 is greater than the exhaust air volume of the first exhaust device 21. In detail, the air blowing control unit 52 controls the air blowing device 41 so that the air blowing volume of the air blowing device 41 is greater than the air volume when the exhaust air volume of the first exhaust device 21 is set to "strong". This makes the pressure P3 in the third space R3 greater than the pressure P1 in the first space R1. As a result, the inflow of outside air into the third space R3 from the gap or vent of the entrance door 30 is suppressed, and air is circulated from the third space R3 to the first space R1. Here, the upper limit of the air blowing volume of the air blowing device 41 is arbitrary, but it is desirable to set it to a level that does not increase the air conditioning load of the air conditioner 11 in the first space R1.

[0046] Then, the exhaust control unit 53 judges whether or not it is currently winter (S14). Here, for example, if the air conditioner 11 is performing heating operation or if the current date is between October and March, it is judged that it is winter.

[0047] If it is currently winter (S14: YES), the exhaust control unit 53 sets the exhaust air volume of the first exhaust device 21 to "weak" (S15). More specifically, if the exhaust air volume of the first exhaust device 21 at the time of the judgment in step S14 is "weak", the air volume is not changed, and if it is "strong", the air volume is reduced to "weak". On the other hand, if it is not currently winter (S14: NO), the exhaust control unit 53 sets the exhaust air volume of the first exhaust device 21 to "strong" (S16). More specifically, if the exhaust air volume of the first exhaust device 21 at the time of the judgment in step S14 is "strong", the air volume is not changed, and if it is "weak", the air volume is increased to "strong".

[0048] Then, the air blowing control unit 52 judges whether or not the end condition is satisfied (S17). The end condition is the same as that in the first embodiment. If the end condition is not satisfied (S17: NO), the air blowing is continued until the end condition is satisfied. If the end condition is satisfied (S17: YES), the air blowing control unit 52 stops the air blowing device 41 (S18). When the air blowing by the air blowing device 41 is stopped, the exhaust control unit 53 returns the exhaust air volume of the first exhaust device 21 to the air volume before the operation of the air blowing device 41 started (S19).

[0049] As described above, in the air conditioning system 100A of the present embodiment, the air volume of the blower 41 is made larger than the air volume of the first exhaust device 21, so that the pressure P3 in the third space R3 can be made larger than the pressure P1 in the first space R1. As a result, as in the first embodiment, it is possible to suppress the inflow of outside air and form a circulating airflow within the building 200. As a result, the deterioration of the improvement effect of the thermal environment in the building 200 is suppressed, and the comfort of the users can be improved.

[0050] Embodiment 3 An air conditioning system 100A according to the third embodiment will be described. The air conditioning system 100A according to the third embodiment differs from the first embodiment in that it includes an occupancy detection device 22 installed in the second space R2 and in cooperative control between the blower device 41 and the first exhaust device 21. The other configurations of the air conditioning system 100A are the same as those of the first embodiment.

[0051] Fig. 9 is a schematic configuration diagram of an air conditioning system 100A according to embodiment 3. Like Fig. 1, Fig. 9 shows a plan view of a building 200 and each component of an air conditioning system 100A installed in the building 200. As shown in Fig. 9, the air conditioning system 100A of the present embodiment includes a presence detection device 22 that detects the presence or absence of a person in the second space R2.

[0052] The presence detection device 22 is, for example, a human sensor provided on the ceiling or wall of the second space R2. Alternatively, the presence detection device 22 may be a light switch for the second space R2, and when the light is ON, it determines that there is a person in the second space R2, and when the light is OFF, it determines that there is no person in the second space R2. Alternatively, the presence detection device 22 may be a sensor that detects the opening and closing of the changing room door 20, or, when the second space R2 is a toilet, it may be a sensor that detects the opening and closing of the toilet seat. The detection result of the presence detection device 22 is transmitted to the control device 5.

[0053] Moreover, the blower 41 of the present embodiment is a blower fan equipped with an inverter, and the rotation speed is variably controlled, thereby controlling the amount of air blown from the first space R1 to the third space R3.

[0054] 10 is a control block diagram of an air conditioning system 100A according to embodiment 3. A control device 5 according to this embodiment is connected to the air conditioning device 11, the blower device 41, the first exhaust device 21, and the occupancy detection device 22 so as to be able to communicate wirelessly. The control device 5 performs coordinated control of the blower device 41 and the first exhaust device 21 based on the operation information of the air conditioning device 11 and the detection result of the occupancy detection device 22. The control device 5 is, for example, an information communication terminal such as a smartphone equipped with a CPU and a memory.

[0055] The control device 5 of this embodiment has an information acquisition unit 51, an airflow control unit 52, and an exhaust control unit 53, similarly to the first embodiment. The information acquisition unit 51, the airflow control unit 52, and the exhaust control unit 53 are functional units realized by the CPU of the control device 5 executing a program. Alternatively, at least any one of the information acquisition unit 51, the airflow control unit 52, and the exhaust control unit 53 may be realized by a processing circuit such as an ASIC or an FPGA.

[0056] The information acquisition unit 51 acquires operation information of the air conditioning apparatus 11 and the detection result of the occupancy detection device 22. The operation information of the air conditioning apparatus 11 is information on the operation mode of the air conditioning apparatus 11, such as operation, stop, cooling or heating, and the operation state, such as continuous operation or intermittent operation. The detection result of the occupancy detection device 22 is the presence or absence of a person in the second space R2.

[0057] The air blowing control unit 52 of this embodiment controls the operation, stop, and air blowing volume during operation of the air blowing device 41 based on the operation information of the air conditioning device 11 and the exhaust air volume of the first exhaust device 21 acquired by the information acquisition unit 51. Specifically, the air blowing control unit 52 controls the air blowing volume of the air blowing device 41 so that it is greater than the exhaust air volume of the first exhaust device 21. As a result, when the air blowing device 41 is operating, the relationship between the pressure P1 in the first space R1, the pressure P2 in the second space R2, and the pressure P3 in the third space R3 can be set to P3>P1>P2.

[0058] The exhaust control unit 53 controls the exhaust air volume of the first exhaust device 21 based on the settings made by the user, the operating state of the blower 41, and the detection result of the presence detection device 22. As an example, the exhaust control unit 53 switches the exhaust air volume of the first exhaust device 21 to either "strong" or "weak." A "strong" exhaust air volume is, for example, an air volume that satisfies a ventilation rate of 0.5 times / h in the building 200. A "weak" exhaust air volume is, for example, an air volume that satisfies a ventilation rate of 0.25 times / h in the building 200.

[0059] The exhaust control unit 53 switches the exhaust air volume of the first exhaust device 21 to "strong" or "weak" depending on the occupancy status in the second space R2. FIG. 11 is a diagram for explaining the exhaust air volume of the first exhaust device 21 when there is a person in the second space R2, and FIG. 12 is a diagram for explaining the exhaust air volume of the first exhaust device 21 when there is no person in the second space R2. As shown in FIG. 11, when there is a person in the second space R2, the exhaust control unit 53 sets the exhaust air volume of the first exhaust device 21 to "weak". Also, as shown in FIG. 12, when there is no person in the second space R2, the exhaust control unit 53 sets the exhaust air volume of the first exhaust device 21 to "strong".

[0060] Here, if the exhaust air volume of the first exhaust device 21 is large, the amount of air flowing from the third space R3 into the second space R2 increases. In this case, if the air (wind) flowing into the second space R2 hits the user, the user's comfort decreases due to a draft feeling. In addition, the conditioned air sent from the first space R1 to the third space R3 by the blower device 41 flows into the second space R2, and the effect of improving the thermal environment in the third space R3 also decreases. Therefore, when a person is present in the second space R2, the exhaust air volume of the first exhaust device 21 is reduced compared to the exhaust air volume when no person is present, so that the decrease in the user's comfort and the decrease in the thermal environment in the third space R3 can be suppressed. On the other hand, when no person is present in the second space R2, the exhaust air volume of the first exhaust device 21 is increased compared to the exhaust air volume when a person is present, so that the exhaust of the second space R2 can be promoted.

[0061] Fig. 13 is a flowchart showing the flow of cooperative control in the air conditioning system 100A according to the third embodiment. The flow in Fig. 13 is executed by the control device 5. At the start of this flow, the blower device 41 is stopped, and the first exhaust device 21 is operating at an arbitrary air volume set by the user. First, the information acquisition unit 51 of the control device 5 acquires operation information of the air conditioner 11 (S21). The air conditioner 11 operates in the same manner as in the first embodiment.

[0062] Then, the air blowing control unit 52 of the control device 5 determines whether or not the start condition for the air blowing device 41 is satisfied based on the operation information acquired by the information acquisition unit 51 (S22). The start condition for the air blowing is the same as that in the first embodiment. If the start condition is not satisfied (S22: NO), the control unit 52 waits until the start condition is satisfied. If the start condition is satisfied (S22: YES), the air blowing control unit 52 operates the air blowing device 41 to start blowing air from the first space R1 to the third space R3 (S23).

[0063] At this time, the air blowing control unit 52 controls the rotation speed of the air blowing device 41 so that the air blowing volume of the air blowing device 41 is greater than the exhaust air volume of the first exhaust device 21. In detail, the air blowing control unit 52 controls the air blowing device 41 so that the air blowing volume of the air blowing device 41 is greater than the air volume when the exhaust air volume of the first exhaust device 21 is set to "strong". This makes the pressure P3 in the third space R3 greater than the pressure P1 in the first space R1. As a result, the inflow of outside air into the third space R3 from the gap or vent of the entrance door 30 is suppressed, and air is circulated from the third space R3 to the first space R1. Here, the upper limit of the air blowing volume of the air blowing device 41 is arbitrary, but it is desirable to set it to a level that does not increase the air conditioning load of the air conditioner 11 in the first space R1.

[0064] The exhaust control unit 53 then determines whether or not there is a person in the second space R2 based on the detection result of the presence detection device 22 (S24). If there is a person in the second space R2 (S24: YES), the exhaust control unit 53 sets the exhaust air volume of the first exhaust device 21 to "weak" (S25). In detail, if the exhaust air volume of the first exhaust device 21 at the time of the determination in step S24 is "weak", the air volume is not changed, and if it is "strong", the air volume is reduced to "weak".

[0065] On the other hand, if there is no person in the second space R2 (S24: NO), the exhaust control unit 53 sets the exhaust air volume of the first exhaust device 21 to "strong" (S26). In detail, if the exhaust air volume of the first exhaust device 21 at the time of the judgment in step S24 is "strong", the air volume is not changed, and if it is "weak", the air volume is increased to "strong".

[0066] Then, the air blowing control unit 52 judges whether or not the end condition is satisfied (S27). The end condition is the same as that in the first embodiment. If the end condition is not satisfied (S27: NO), the process returns to step S24 and the subsequent processes are repeated. If the end condition is satisfied (S27: YES), the air blowing control unit 52 stops the blowing device 41 (S28). When the blowing by the blowing device 41 is stopped, the exhaust control unit 53 returns the exhaust air volume of the first exhaust device 21 to the air volume before the operation of the blowing device 41 started (S29).

[0067] As described above, in the air conditioning system 100A of the present embodiment, as in the second embodiment, the air volume of the blower 41 is made larger than the air volume of the first exhaust device 21, so that the pressure P3 in the third space R3 can be made larger than the pressure P1 in the first space R1. As a result, as in the first embodiment, the inflow of outside air can be suppressed and a circulating airflow can be formed in the building 200. As a result, the deterioration of the improvement effect of the thermal environment in the building 200 is suppressed, and the comfort of the users can be improved. In addition, when the blower 41 is operating, the exhaust air volume of the first exhaust device 21 is controlled according to the occupancy status of the second space R2, so that the deterioration of the comfort of the users in the second space R2 and the deterioration of the thermal improvement effect in the third space R3 can be suppressed.

[0068] Embodiment 4 An air conditioning system 100B according to the fourth embodiment will be described. The air conditioning system 100B according to the fourth embodiment differs from the first embodiment in that the air conditioning system 100B according to the fourth embodiment includes a second exhaust device 13 installed in the first space R1. The other configurations of the air conditioning system 100B are the same as those of the first embodiment.

[0069] Fig. 14 is a schematic configuration diagram of an air conditioning system 100B according to embodiment 4. Like Fig. 1, Fig. 14 shows a plan view of a building 200 and each component of an air conditioning system 100B installed in the building 200. As shown in Fig. 14, the air conditioning system 100B of this embodiment includes a second exhaust device 13 that exhausts air in the first space R1 to the outdoors.

[0070] The second exhaust device 13 is an exhaust fan that is installed on the wall of the first space R1 and exhausts the air in the first space R1 to the outside. The second exhaust device 13 is, for example, a range hood installed in the kitchen of the living room. The exhaust air volume of the second exhaust device 13 may be fixed or variable.

[0071] 15 is a control block diagram of an air conditioning system 100B according to embodiment 4. A control device 5 according to this embodiment is connected to the air conditioning device 11, the blower device 41, the first exhaust device 21, and the second exhaust device 13 so as to be able to communicate wirelessly, and performs coordinated control of the blower device 41 and the first exhaust device 21 based on operation information of the air conditioning device 11 and the second exhaust device 13. The control device 5 is, for example, an information communication terminal such as a smartphone equipped with a CPU and a memory.

[0072] 15, the control device 5 of the present embodiment has an information acquisition unit 51, an airflow control unit 52, and an exhaust control unit 53, similar to the first embodiment. The information acquisition unit 51, the airflow control unit 52, and the exhaust control unit 53 are functional units realized by the CPU of the control device 5 executing a program. Alternatively, at least any one of the information acquisition unit 51, the airflow control unit 52, and the exhaust control unit 53 may be realized by a processing circuit such as an ASIC or an FPGA.

[0073] The information acquisition unit 51 acquires operation information from the air conditioner 11 and the second exhaust device 13. The operation information of the air conditioner 11 is information on the operation state of the air conditioner 11, such as operation, stop, operation mode such as cooling or heating, and operation state such as continuous operation or intermittent operation. Moreover, the operation information of the second exhaust device 13 is information on the operation, stop, and exhaust air volume during operation of the first exhaust device 21.

[0074] The air blowing control unit 52 controls the operation, stopping, and air blowing volume of the air blowing device 41 during operation based on the operation information of the air conditioning device 11 and the second exhaust device 13 acquired by the information acquisition unit 51. The air blowing volume of the air blowing device 41 is set to an air volume that satisfies the ventilation rate of 0.5 times / h in the building 200, for example.

[0075] The exhaust control unit 53 controls the exhaust air volume of the first exhaust device 21 based on the operating state of the blower device 41 and the air volume of the blower device 41. As in the first embodiment, when the blower device 41 is operating, the exhaust control unit 53 controls the exhaust air volume of the first exhaust device 21 to be smaller than the air volume of the blower device 41. As a result, when the blower device 41 is operating, the relationship between the pressure P1 in the first space R1, the pressure P2 in the second space R2, and the pressure P3 in the third space R3 can be set to P3>P1>P2.

[0076] FIG. 16 is a flowchart showing the flow of cooperative control in the air conditioning system 100B according to the fourth embodiment. The flow in FIG. 16 is executed by the control device 5. At the start of this flow, the blower 41 is stopped, and the first exhaust device 21 and the second exhaust device 13 are operating at an arbitrary air volume set by the user. First, the information acquisition unit 51 of the control device 5 acquires operation information of the air conditioner 11 and the second exhaust device 13 (S31). The air conditioner 11 operates in the same way as in the first embodiment. The subsequent steps S32 to S36 are the same as steps S2 to S6 in the first embodiment.

[0077] After the exhaust control unit 53 controls the exhaust air volume of the first exhaust device 21, the air blowing control unit 52 judges whether the exhaust air volume of the second exhaust device 13 is greater than the air volume of the blower device 41 (S37). If the exhaust air volume of the second exhaust device 13 is greater than the air volume of the blower device 41 (S37: YES), the air blowing control unit 52 stops the blower device 41 (S39).

[0078] Here, when the second exhaust device 13 is provided in the first space R1, if the exhaust air volume of the first space R1 and the blown air volume from the first space R1 to the third space R3 become too large, the inflow of outside air into the first space R1 increases, and the thermal load of the air conditioner 11 increases. In addition, the exhaust efficiency of the second exhaust device 13 also decreases. Therefore, the air blowing control unit 52 of this embodiment stops the blower 41 when the exhaust air volume of the second exhaust device 13 is larger than the blown air volume. This makes it possible to suppress an increase in the thermal load of the air conditioner 11 and a decrease in the exhaust efficiency of the second exhaust device 13.

[0079] On the other hand, if the exhaust air volume of the second exhaust device 13 is equal to or less than the air volume of the blower device 41 (S37: NO), the airflow control unit 52 judges whether or not the end condition is satisfied (S38). The end condition is the same as that in the first embodiment. If the end condition is not satisfied (S38: NO), the process returns to step S37 and the subsequent processes are repeated. If the end condition is satisfied (S38: YES), the airflow control unit 52 stops the blower device 41 (S39). Then, when the blowing by the blower device 41 is stopped, the exhaust control unit 53 returns the exhaust air volume of the first exhaust device 21 to the air volume before the operation of the blower device 41 started (S40).

[0080] As described above, in the air conditioning system 100B of the present embodiment, by controlling the blower 41 and the first exhaust device 21 in a coordinated manner as in the first embodiment, it is possible to suppress the inflow of outside air and form a circulating airflow within the building 200. As a result, a decrease in the improvement effect of the thermal environment in the building 200 is suppressed, and the comfort of the users can be improved. Furthermore, in the case where the second exhaust device 13 installed in the first space R1 is provided, an increase in the air conditioning load of the air conditioner 11 and a decrease in the exhaust efficiency of the second exhaust device 13 can be suppressed by controlling the blower 41 according to the exhaust air volume of the second exhaust device 13.

[0081] Embodiment 5. An air conditioning system 100C according to the fifth embodiment will be described. The air conditioning system 100C according to the fifth embodiment differs from the first embodiment in the coordinated control of the blower 41 and the first exhaust device 21. The configuration of the air conditioning system 100C is the same as that of the first embodiment. However, the blower 41 according to the present embodiment is a blower fan equipped with an inverter, and the amount of air sent from the first space R1 to the third space R3 is controlled by variably controlling the rotation speed. Also, in the present embodiment, the second space R2 in which the first exhaust device 21 is installed is a bathroom.

[0082] The airflow control unit 52 of the control device 5 in this embodiment controls the operation, stop, and airflow volume during operation of the air blower 41 based on the operation information of the air conditioning device 11 and the exhaust airflow volume of the first exhaust device 21 acquired by the information acquisition unit 51. Specifically, the airflow control unit 52 controls the airflow volume of the air blower 41 to be larger than the exhaust airflow volume of the first exhaust device 21, as in the second and third embodiments. As a result, when the air blower 41 is operating, the relationship between the pressure P1 in the first space R1, the pressure P2 in the second space R2, and the pressure P3 in the third space R3 can be P3>P1>P2. In addition, the airflow control unit 52 stops the air blower 41 when the exhaust airflow volume of the first exhaust device 21 is equal to or greater than a preset threshold value.

[0083] The exhaust control unit 53 controls the exhaust air volume of the first exhaust device 21 based on the settings made by the user. Specifically, the exhaust control unit 53 switches the exhaust air volume of the first exhaust device 21 to either "strong" or "weak." Furthermore, in this embodiment, the exhaust control unit 53 can operate the first exhaust device 21 in a "bathroom drying mode." The exhaust air volume of the first exhaust device 21 in the bathroom drying mode is greater than that in "strong."

[0084] The exhaust air volume of the first exhaust device 21 will be described with reference to Figs. 17 and 18. Fig. 17 is a diagram for explaining the exhaust air volume when a person is present in the second space R2, and Fig. 18 is a diagram for explaining the exhaust air volume when no person is present in the second space R2. As shown in Fig. 17, when a person is present in the second space R2, the exhaust air volume of the first exhaust device 21 is set to "weak". This prevents a decrease in the comfort of the user in the bathroom when the second space R2 is a bathroom and there is a person in the bathroom. Also, as shown in Fig. 18, when no person is present in the second space R2, the first exhaust device 21 is set to the bathroom drying mode. This promotes ventilation and drying of the second space R2.

[0085] Fig. 19 is a flowchart showing the flow of cooperative control in an air conditioning system 100C according to the fifth embodiment. The flow in Fig. 19 is executed by the control device 5. At the start of this flow, the blower 41 is stopped, and the first exhaust device 21 is operating at an arbitrary air volume set by the user. First, the information acquisition unit 51 of the control device 5 acquires operation information of the air conditioner 11 (S41). The air conditioner 11 operates in the same manner as in the first embodiment.

[0086] Then, the air blowing control unit 52 of the control device 5 determines whether or not the start condition for the air blowing device 41 is satisfied based on the operation information acquired by the information acquisition unit 51 (S42). The start condition for the air blowing is the same as that in the first embodiment. If the start condition is not satisfied (S42: NO), the control unit 52 waits until the start condition is satisfied. If the start condition is satisfied (S42: YES), the air blowing control unit 52 operates the air blowing device 41 to start blowing air from the first space R1 to the third space R3 (S43).

[0087] At this time, the air blowing control unit 52 controls the rotation speed of the air blowing device 41 so that the air blowing volume of the air blowing device 41 is greater than the exhaust air volume of the first exhaust device 21. This makes the pressure P3 in the third space R3 greater than the pressure P1 in the first space R1. As a result, the inflow of outside air into the third space R3 from the gap or the air vent of the entrance door 30 is suppressed, and air is circulated from the third space R3 to the first space R1.

[0088] Then, the air blowing control unit 52 judges whether the exhaust air volume of the first exhaust device 21 is greater than a preset threshold value (S44). If the exhaust air volume of the first exhaust device 21 is greater than the preset threshold value (S44: YES), the air blowing control unit 52 stops the air blowing device 41 (S46). The preset threshold value is, for example, the air volume when the first exhaust device 21 is in the bathroom drying mode.

[0089] Here, when the second space R2 is a bathroom and the first exhaust device 21 is set to the bathroom drying mode, the exhaust air volume increases as shown in Fig. 18, and the conditioned air in the first space R1 flows into the third space R3 and the second space R2 through the gap in the living room door 10. This makes it possible to improve the thermal environment in the third space R3, and makes it unnecessary to blow air by the blower 41. Therefore, in this case, by stopping the blower 41, it is possible to reduce power consumption in the air conditioning system 100C.

[0090] If the exhaust air volume of first exhaust device 21 is equal to or less than a preset threshold value (S44: NO), air blowing control unit 52 judges whether or not a termination condition is satisfied (S45). The termination condition is the same as that in the first embodiment. If the termination condition is not satisfied (S45: NO), the process returns to step S44, and the subsequent processes are repeated. Then, if the termination condition is satisfied (S45: YES), air blowing control unit 52 stops air blowing device 41 (S46).

[0091] As described above, in the air conditioning system 100C of this embodiment, similarly to the second embodiment, the blower device 41 and the first exhaust device 21 are controlled in a coordinated manner to suppress the inflow of outside air and form a circulating air current within the building 200. As a result, the deterioration of the improvement effect of the thermal environment in the building 200 is suppressed, and the comfort of the users can be improved. In addition, when the blower device 41 does not need to blow air, the blower device 41 is stopped, thereby reducing the power consumption of the air conditioning system 100C.

[0092] The above is a description of the embodiments, but the above embodiments can be modified and combined. For example, any or all of the coordinated controls of the first to fifth embodiments may be combined. Specifically, the air conditioning system 100C of the fifth embodiment may be combined with the presence detection device 22 of the third embodiment, and the exhaust control unit 53 may control the exhaust air volume of the first exhaust device 21 based on the presence or absence of a person in the second space R2.

[0093] Furthermore, the configuration and affiliation of the control device 5 are not limited to those in the above embodiment. For example, the control device 5 may be a control device of the air conditioning device 11, or may be a control device built into the blower device 41 or the first exhaust device 21. Furthermore, each functional unit of the control device 5 may be realized by a different control device. For example, the blower control unit 52 may be realized by a control device built into the blower device 41, and the exhaust control unit 53 may be realized by a control device built into the first exhaust device 21.

[0094] Moreover, the start and end conditions of air blowing by the air blowing device 41 are not limited to the examples of the above embodiment. Fig. 20 is a control block diagram of an air conditioning system 100D according to Modification 1. As shown in Fig. 20, the control device 5 of the air conditioning system 100D of Modification 1 is connected to an external device 6 via a network 300 so as to be able to communicate with each other.

[0095] The information acquisition unit 51 of this modified example acquires information from the external device 6 via a network 300 such as the Internet. The airflow control unit 52 uses the information acquired from the external device 6 as a start condition and an end condition for airflow by the airflow device 41. For example, the external device 6 is an outdoor air temperature sensor that detects the outdoor air temperature, and the information acquisition unit 51 acquires the outdoor air temperature from the external device 6. The airflow control unit 52 adds the outdoor air temperature acquired from the external device 6 to the start condition. Specifically, when the air conditioning device 11 is performing cooling operation, the start condition is that either the above condition (A) or condition (B) is satisfied and the outdoor air temperature is equal to or higher than a first temperature (e.g., 30°C) set in advance. Also, when the air conditioning device 11 is performing heating operation, the start condition is that either the condition (A) or condition (B) is satisfied and the outdoor air temperature is equal to or lower than a second temperature (e.g., 10°C) set in advance.

[0096] Alternatively, the external device 6 may be a temperature sensor that detects the temperature of the third space R3, and the information acquisition unit 51 may acquire the temperature of the third space R3 from the external device 6. The air blowing control unit 52 adds the temperature of the third space R3 acquired from the external device 6 to the start conditions. Specifically, when the air conditioning device 11 is performing cooling operation, the start condition is that the temperature of the third space R3 is equal to or higher than a preset third temperature (e.g., 28°C). Also, when the air conditioning device 11 is performing heating operation, the start condition is that the temperature of the third space R3 is equal to or lower than a preset fourth temperature (e.g., 20°C).

[0097] Alternatively, the external device 6 may be a server that provides weather information, and the information acquisition unit 51 may acquire the weather information from the external device 6. In this case, the air blow control unit 52 adds information about the outside air temperature or weather contained in the weather information acquired from the external device 6 to the start conditions. The case where the outside air temperature is added to the start conditions is as described above. Specifically, when information about the weather is added to the start conditions, the start conditions are that either condition (A) or condition (B) is satisfied and the weather is fine when the air conditioning device 11 is performing cooling operation.

[0098] In this way, by adding environmental information such as the outside air temperature, the temperature of the third space R3, or weather information as the conditions for starting air blowing, air can be blown when air conditioning of the third space R3 is necessary, improving the thermal environment, while also suppressing unnecessary air blowing and reducing power consumption.

[0099] Furthermore, the exhaust control unit 53 in the second embodiment may determine whether the current season is winter or not based on the outside air temperature or the temperature of the third space R3 acquired from the external device 6. For example, the exhaust control unit 53 may determine that it is winter when the outside air temperature is equal to or lower than a preset second temperature (e.g., 10°C) or when the temperature of the third space R3 is equal to or lower than a preset fourth temperature (e.g., 20°C).

[0100] Furthermore, the airflow control unit 52 may add the status of the third space R3 to the conditions for ending airflow. For example, when the entrance door 30 is open, outside air flows into the third space R3, so even if air from the first space R1 is blown into the third space R3, the effect of improving the thermal environment is low and the air conditioning load of the air conditioner 11 increases. Therefore, the airflow control unit 52 may set the condition for ending airflow as follows: the entrance door 30 of the third space R3 is open for a preset third time (e.g., 5 minutes).

[0101] Whether the front door 30 is open or not can be determined by detecting a change in the torque of the motor of the blower 41. Alternatively, whether the front door 30 is open or not may be detected by an opening / closing sensor provided on the front door 30, or a temperature sensor may be provided in the third space R3, and it may be determined that the front door 30 is open when the temperature in the third space R3 suddenly changes.

[0102] Furthermore, the air blowing control unit 52 may add the temperature of the air blown out from the outlet 43 of the third space R3 to the end condition of the air blowing. For example, when the air conditioner 11 is performing cooling operation, the end condition may be that the temperature of the air blown out from the outlet 43 is higher than the temperature of the third space R3. Also, when the air conditioner 11 is performing heating operation, the end condition may be that the temperature of the air blown out from the outlet 43 is lower than the temperature of the third space R3. This allows the air blower 41 to be stopped when an abnormality such as damage to the air passage 4 occurs, and unnecessary air blowing can be suppressed. As a result, an increase in the load on the air conditioner 11 can be suppressed, and power consumption can be reduced.

[0103] Furthermore, on clear winter days, the air blowing control unit 52 may operate the air blowing device 41 during a predetermined time period in the daytime to blow air from the first space R1 to the third space R3, regardless of whether the air conditioning device 11 is operating. This makes it possible to prevent the room temperature in the first space R1 from rising too high, and improve the thermal environment throughout the building 200 without using air conditioning by the air conditioning device 11.

[0104] Furthermore, when the blower 41 is operating around sunset on a fine day, the blower control unit 52 may control the blower 41 to stop operation or reduce the amount of blowing air. On a fine day, the difference between the amount of solar power generation during the day and the amount of solar power generation after sunset becomes large, and the demand for electricity other than solar power generation increases sharply around sunset, which may disrupt the supply and demand balance. Therefore, by stopping the operation of the blower 41 around sunset on a fine day, the amount of power consumption can be reduced, which contributes to stabilizing the power supply.

[0105] In addition, the term "outdoors" in the above description may include not only the outside of the building 200 but also the outside of a space that is not subject to air conditioning, such as a parking lot within the building 200. Furthermore, the term "outdoor air" may include not only the air outside the building 200 but also the outside air that is not subject to air conditioning.

[0106] Various aspects of the present disclosure are summarized below as appendices.

[0107] (Appendix 1) An air conditioning system installed in a building having a first space, a second space, and a third space communicating with the first space and the second space, An air conditioning device installed in the first space for heating or cooling the first space; An air supply device installed in the first space for supplying outside air into the first space; A first exhaust device that is installed in the second space and exhausts air from the second space to the outside; a blower provided in an air passage connecting the first space and the third space and configured to blow air from the first space to the third space; a control device that controls the air blower and the first exhaust device in cooperation with each other. (Appendix 2) 2. The air conditioning system according to claim 1, wherein the control device controls an exhaust air volume of the first exhaust device after the blower device starts operating. (Appendix 3) 3. The air conditioning system according to claim 1, wherein the control device controls the first exhaust device so that an exhaust air volume of the first exhaust device is greater than an air volume of the blower device. (Appendix 4) The air conditioning system according to claim 1 or 2, wherein when the blower is operating and the current season is winter, the control device reduces the exhaust air volume of the first exhaust device below the exhaust air volume when the current season is other than winter. (Appendix 5) Further comprising a presence detection device installed in the second space and detecting the presence or absence of a person in the second space, The air conditioning system of claim 1 or 2, wherein when the blower is operating and the occupancy detection device detects that no one is in the second space, the control device increases the exhaust air volume of the first exhaust device above the exhaust air volume when the occupancy detection device detects that no one is in the second space. (Appendix 6) Further, a second exhaust device is provided in the first space and exhausts air from the first space to the outside. 6. The air conditioning system according to any one of claims 1 to 5, wherein the control device stops the blower device when an exhaust air volume of the second exhaust device is larger than an air volume of the blower device. (Appendix 7) 7. The air conditioning system according to any one of claims 1 to 6, wherein the control device stops the blower when an exhaust air volume of the first exhaust device is greater than a preset threshold value. (Appendix 8) The control device starts operation of the blower device when a start condition is satisfied, The starting condition is A preset first time has elapsed since the air conditioning device started operating; The air conditioning apparatus is in intermittent operation; When the air conditioning device is performing cooling operation, the outdoor air temperature is equal to or higher than a preset first temperature; When the air conditioning device is performing a heating operation, the outside air temperature is equal to or lower than a preset second temperature; The air conditioning apparatus is performing the cooling operation and the weather is fine. When the air conditioning apparatus is performing the cooling operation, the temperature of the third space is equal to or higher than a preset third temperature, or An air conditioning system as described in any one of appendices 1 to 7, wherein when the air conditioner is performing the heating operation, the temperature of the third space is equal to or lower than a preset fourth temperature. [Explanation of symbols]

[0108] 4 Air duct, 5 Control device, 6 External equipment, 10 Room door, 11 Air conditioning device, 12 Air supply device, 13 Second exhaust device, 20 Changing room door, 21 First exhaust device, 22 Occupancy detection device, 30 Entrance door, 41 Blower device, 42 Intake port, 43 Outlet port, 51 Information acquisition unit, 52 Blower control unit, 53 Exhaust control unit, 100, 100A, 100B, 100C, 100D Air conditioning system, 200 Building, 300 Network, R1 First space, R2 Second space, R3 Third space.

Claims

1. An air conditioning system installed in a building having a first space, a second space, and a third space communicating with the first space and the second space, An air conditioning device installed in the first space for heating or cooling the first space; an air supply device installed in the first space and configured to supply outside air into the first space; a first exhaust device that is installed in the second space and exhausts air from the second space to the outside; a blower provided in an air passage connecting the first space and the third space and configured to blow air from the first space to the third space; a control device that controls the blower device and the first exhaust device in cooperation with each other so that the pressure in the third space is greater than the pressure in the first space.

2. The air conditioning system according to claim 1 , wherein the control device controls an exhaust air volume of the first exhaust device after the blower device starts operating.

3. The air conditioning system according to claim 1 or 2, wherein the control device controls the first exhaust device so that an exhaust air volume of the first exhaust device is smaller than an air volume of the blower device.

4. The air conditioning system according to claim 1 or 2, wherein when the blower device is operating and the current season is winter, the control device reduces the exhaust air volume of the first exhaust device below the exhaust air volume when the current season is other than winter.

5. Further comprising an occupancy detection device that is installed in the second space and detects the presence or absence of a person in the second space, The air conditioning system of claim 1 or 2, wherein when the blower is operating and the occupancy detection device detects that no one is in the second space, the control device increases the exhaust air volume of the first exhaust device above the exhaust air volume when the occupancy detection device detects that a person is in the second space.

6. A second exhaust device is provided in the first space and exhausts air from the first space to the outside. The air conditioning system according to claim 1 or 2, wherein the control device stops the blower device when an exhaust air volume of the second exhaust device is larger than an air volume of the blower device.

7. The air conditioning system according to claim 1 or 2, wherein the control device stops the blower when an exhaust air volume of the first exhaust device is greater than a preset threshold value.

8. The control device starts operation of the blower device when a start condition is satisfied, The starting condition is A preset first time has elapsed since the air conditioning device started operating; The air conditioning apparatus is in intermittent operation; When the air conditioning device is performing cooling operation, the outdoor air temperature is equal to or higher than a preset first temperature; When the air conditioning apparatus is performing a heating operation, the outside air temperature is equal to or lower than a preset second temperature; The air conditioning apparatus is performing the cooling operation and the weather is fine. When the air conditioning apparatus is performing the cooling operation, the temperature of the third space is equal to or higher than a preset third temperature, or The air conditioning system according to claim 1 or 2, wherein at least one of the conditions is that the temperature of the third space is equal to or lower than a preset fourth temperature when the air conditioner is performing the heating operation.

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