Air conditioning system

Abstract

An air conditioning system (1) is provided with an acquisition unit (110), a reception unit (120), and a control unit (130). The acquisition unit (110) acquires information relating to the air quality of outdoor air. The reception unit (120) receives a ventilation operation request. The control unit (130) performs, as ventilation operations, an air supply operation for supplying outdoor air into a room, and an exhaust operation for exhausting indoor air to the outside. The control unit (130) starts the air supply operation when a request for the ventilation operation is accepted, and switches from the air supply operation to the exhaust operation when the information satisfies a first condition.

Description

Technical Field

[0001] The present invention relates to an air conditioning system. Background Art

[0002] Patent Document 1 (Japanese Patent Application Laid-Open No. 2006-133121) discloses a ventilator that controls the introduction of outside air from outside to inside the room. The ventilator controls the introduction of outside air based on information related to air pollution prediction. Summary of the invention

[0003] Problems to be solved by the invention

[0004] In the above-mentioned Patent Document 1, if it is determined that the outside air is polluted, the ventilation device is controlled so as not to perform the ventilation operation of introducing the outside air from the outside. Therefore, if it is determined that the outside air is polluted, ventilation cannot be performed.

[0005] Means for solving problems

[0006] The air conditioning system of the first aspect comprises an acquisition unit, a receiving unit and a control unit. The acquisition unit acquires information related to the air quality of outdoor air. The receiving unit receives a request for ventilation operation. The control unit performs an air supply operation for supplying outdoor air to the room and an exhaust operation for exhausting indoor air to the outside as ventilation operation. When receiving a request for ventilation operation, the control unit starts the air supply operation, and when the above information satisfies the first condition, the control unit switches from the air supply operation to the exhaust operation.

[0007] According to the air conditioning system of the first viewpoint, when a request for ventilation operation is received, air supply operation is started, so that the ventilation volume can be ensured. Furthermore, when the information related to the air quality of the outdoor air satisfies the first condition, in other words, when the outdoor environment deteriorates, the air supply operation is switched to the exhaust operation. Therefore, the exhaust operation as the ventilation operation can be performed in a state where the outdoor air of the air quality that satisfies the first condition is suppressed from being introduced into the room. In this way, the air conditioning system of the first viewpoint can perform one of the air supply operation and the exhaust operation according to the air quality of the outdoor air.

[0008] The air conditioning system according to the second aspect is the air conditioning system according to the first aspect, wherein the control unit restarts the air supply operation when the information does not satisfy the second condition during the exhaust operation.

[0009] In the air conditioning system of the second viewpoint, when the information related to the air quality of the outdoor air does not satisfy the second condition, in other words, when the outdoor environment is improved, the exhaust operation is switched to the air supply operation. Therefore, outdoor air of air quality that does not satisfy the second condition can be introduced into the room. Therefore, the indoor air quality can be appropriately maintained, and the ventilation volume based on the air supply operation can be increased.

[0010] The air conditioning system of the third aspect is the air conditioning system of the first aspect or the second aspect, wherein the control unit performs at least one of cooling operation and heating operation. The control unit has a third condition for switching from air supply operation to exhaust operation during at least one of cooling operation and heating operation. The third condition is a condition that makes it easier to switch to exhaust operation than the first condition.

[0011] In the air conditioning system of the third aspect, the control unit has a third condition that facilitates switching to the exhaust operation during the cooling operation and the heating operation. Therefore, the air supply operation can be easily switched to the exhaust operation during the cooling operation and the heating operation.

[0012] The air-conditioning system of the fourth viewpoint In the air-conditioning system of the third viewpoint, when the temperature of the outdoor air is above a specified temperature or the humidity of the outdoor air is above a specified humidity during cooling operation, or when the temperature of the outdoor air is below a specified temperature or the humidity of the outdoor air is below a specified humidity during heating operation, when the third condition is met, the control unit switches from air supply operation to exhaust operation.

[0013] In the air conditioning system of the fourth aspect, the third condition is executed when the temperature or humidity of the outdoor air is high during cooling operation and when the temperature or humidity of the outdoor air is low during heating operation, so that it is easy to switch to exhaust operation. Therefore, it is possible to prevent high-temperature or high-humidity outdoor air from being introduced into the room during cooling operation, and it is possible to prevent low-temperature or low-humidity outdoor air from being introduced into the room during heating operation. Therefore, it is possible to prevent the reduction in the efficiency of cooling operation and heating operation.

[0014] An air-conditioning system according to a fifth aspect is the air-conditioning system according to any one of the first to fourth aspects, wherein the acquisition unit acquires the information from a server.

[0015] As in the air conditioning system of the fifth aspect, information on air quality may be acquired from a server.

[0016] An air conditioning system according to a sixth aspect is the air conditioning system according to any one of the first to fifth aspects, wherein the information includes at least one of pollen, PM2.5, dust, and sand.

[0017] In the air conditioning system of the sixth aspect, one of the air supply operation and the exhaust operation can be performed according to at least one of pollen, PM2.5, dust and sand in the outdoor air. Therefore, at least one of pollen, PM2.5, dust and sand can be appropriately maintained indoors.

[0018] An air-conditioning system according to a seventh aspect is the air-conditioning system according to any one of the first to sixth aspects, wherein the control unit continues the air-supply operation for a predetermined time after starting the air-supply operation regardless of the first condition.

[0019] In the air conditioning system of the seventh aspect, when the ventilation operation request is received and the air supply operation is started, the air supply operation is continued for a predetermined time. Therefore, when the user issues a ventilation operation request, a sufficient ventilation volume can be ensured.

[0020] An air conditioning system according to an eighth aspect is the air conditioning system according to any one of the first to seventh aspects, wherein the control unit switches to the air supply operation regardless of the first condition when a predetermined time has elapsed after switching to the exhaust operation.

[0021] In the air conditioning system of the eighth aspect, when the exhaust operation is performed for a predetermined time, the air supply operation can be temporarily performed. Therefore, a sufficient ventilation volume can be ensured.

[0022] In the air conditioning system of a ninth aspect, in the air conditioning system of any one of the first to eighth aspects, an air supply path for sending outdoor air to indoors during air supply operation and an exhaust path for sending indoor air to outdoors during exhaust operation are shared.

[0023] In the air conditioning system of the ninth aspect, since the air supply path and the exhaust path are shared, the path through which outdoor air and indoor air pass can be enlarged. Therefore, the air supply amount and exhaust amount can be increased.

[0024] The air conditioning system of the tenth aspect is the air conditioning system of the ninth aspect, and further comprises a hose, a ventilator and an indoor unit. The hose has a common air supply path and an exhaust path. The ventilator is arranged outdoors and performs air supply operation and exhaust operation. The indoor unit is connected to the ventilator via the hose.

[0025] In the air conditioning system of the tenth aspect, the hose through which the outdoor air for supply and the indoor air for exhaust pass is common, and therefore, an air conditioning system that increases the amount of air supply and exhaust can be easily realized.

[0026] An air conditioning system according to an eleventh aspect is the air conditioning system according to any one of the first to tenth aspects, further comprising a switching damper that performs a switching operation from one of the air supply operation and the exhaust operation to the other operation.

[0027] In the air conditioning system of the eleventh aspect, the air supply operation and the exhaust operation can be easily switched by switching the damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an external view of an air conditioning system according to an embodiment of the present disclosure.

[0029] Figure 2 This is a diagram in which the outline of the air flow is added to the system diagram of the refrigerant circuit used in the air conditioning system.

[0030] Figure 3 It is the control block diagram of the air conditioning system.

[0031] Figure 4 This is a flowchart showing control by a control unit according to the embodiment.

[0032] Figure 5 : is a flowchart showing control of the control unit according to the modification example.

[0033] Fig. 6A This is a flowchart showing control of the control unit according to another modification example.

[0034] Figure 6B This is a flowchart showing control of the control unit according to another modification example. DETAILED DESCRIPTION

[0035] (1) Overall structure

[0036] like Figure 1 and Figure 2 As shown, an air conditioning system 1 according to an embodiment of the present disclosure performs indoor air conditioning and ventilation of a building or the like. The air conditioning system 1 includes an air conditioning device 1a for performing indoor air conditioning, a ventilation device 1b for performing indoor ventilation, Figure 3 The obtaining unit 110, the receiving unit 120 and the control unit 130 are shown.

[0037] The air-conditioning apparatus 1a performs at least one of a cooling operation and a heating operation as an air-conditioning operation. The air-conditioning apparatus 1a of the present embodiment performs a cooling operation, a dehumidifying operation, and a heating operation.

[0038] The ventilator 1 b performs, as ventilation operations, an air supply operation for supplying outdoor air to the room and an exhaust operation for exhausting indoor air to the outside.

[0039] The acquisition unit 110 acquires information on the air quality of the outdoor air. The reception unit 120 receives a request for ventilation operation.

[0040] The control unit 130 controls the components of the air conditioning device 1a and the ventilation device 1b. The control unit 130 of the present embodiment controls in a manner to perform air conditioning operation and ventilation operation. When receiving a request for ventilation operation, the control unit 130 starts air supply operation, and switches from air supply operation to exhaust operation when information related to the air quality of outdoor air satisfies a first condition.

[0041] (2) Detailed structure

[0042] (2-1) Air conditioning unit

[0043] like Figure 1 and Figure 2 As shown, the air conditioning device 1a includes an indoor unit 2, an outdoor unit 3, and communication pipes 31 and 32. The indoor unit 2 is arranged indoors. The outdoor unit 3 is arranged outdoors. The communication pipes 31 and 32 connect the indoor unit 2 and the outdoor unit 3. The indoor unit 2 and the outdoor unit 3 are connected via the communication pipes 31 and 32, thereby forming a vapor compression refrigerant circuit.

[0044] (2-1-1) Indoor unit

[0045] The indoor unit 2 of this embodiment is a wall-mounted type. Figure 2 As shown, the indoor unit 2 includes an indoor heat exchanger 11 , an indoor fan 12 , and a fan motor 13 .

[0046] The indoor heat exchanger 11 performs heat exchange between the refrigerant and the indoor air. The indoor fan 12 draws the indoor air into the indoor unit 2, and blows the air into the room after performing heat exchange with the indoor heat exchanger 11. The fan motor 13 drives the indoor fan 12 to rotate.

[0047] In addition, the indoor unit 2 is provided with an inlet 18 and an outlet 19. The inlet 18 inhales indoor air during exhaust operation. In the present embodiment, the inlet 18 also inhales indoor air during air conditioning operation. The outlet 19 blows indoor air and outdoor air into the room. The inlet 18 and the outlet 19 are formed in the housing of the indoor unit 2.

[0048] Here, the suction port 18 is provided upstream of the indoor heat exchanger 11. In the exhaust operation, a part of the indoor air introduced from the suction port 18 is discharged to the outside from the supply and exhaust port 14 without passing through the indoor heat exchanger 11. In the exhaust operation, the remaining part of the indoor air introduced from the suction port 18 exchanges heat with the indoor heat exchanger 11 when passing through the indoor heat exchanger 11 to be cooled, dehumidified or heated, and then is supplied to the room from the blow-out port 19.

[0049] In the air supply operation, the indoor air introduced from the air inlet 18 is cooled, dehumidified, or heated by the indoor heat exchanger 11 , and then supplied to the room from the air outlet 19 .

[0050] In addition, the indoor unit 2 is provided with an air supply and exhaust port 14. The air supply and exhaust port 14 is an air supply port for introducing outdoor air during air supply operation, and is an exhaust port for exhausting indoor air during exhaust operation. In other words, during air supply operation, outdoor air is supplied to the room through the air supply and exhaust port 14, and during exhaust operation, indoor air is exhausted to the outside through the air supply and exhaust port 14. In other words, the air supply and exhaust port 14 is an air supply path for outdoor air to pass through during air supply operation, and is an exhaust path for indoor air to pass through during exhaust operation.

[0051] The air supply and exhaust port 14 is an opening formed in a wall portion in the room and communicates with the internal space of the hose 6 .

[0052] Furthermore, various sensors are disposed in the indoor unit 2. Here, the indoor unit 2 includes an indoor temperature sensor 15 and an indoor humidity sensor 16.

[0053] The indoor temperature sensor 15 detects the indoor temperature. The indoor humidity sensor 16 detects the indoor humidity. The indoor temperature sensor 15 and the indoor humidity sensor 16 may be indoor temperature and humidity sensors that detect the indoor temperature and the indoor humidity.

[0054] In addition, the indoor temperature sensor 15 and the indoor humidity sensor 16 may be arranged somewhere indoors instead of being arranged in the indoor unit 2 .

[0055] (2-1-2) Outdoor unit

[0056] The outdoor unit 3 includes a compressor 21 , a four-way switching valve 22 , a liquid accumulator 23 , an outdoor heat exchanger 24 , an expansion valve 25 , a filter 26 , a liquid stop valve 27 , a gas stop valve 28 , an outdoor fan 29 , and a fan motor 30 .

[0057] The compressor 21 is a mechanism that compresses the low-pressure refrigerant in the refrigeration cycle to a high pressure. The four-way switching valve 22 is connected to the discharge side of the compressor 21. The accumulator 23 is connected to the suction side of the compressor 21. The outdoor heat exchanger 24 is connected to the four-way switching valve 22. The expansion valve 25 is connected to the outdoor heat exchanger 24. The expansion valve 25 is connected to the communication pipe 32 via the filter 26 and the liquid stop valve 27, and is connected to one end of the indoor heat exchanger 11 via the communication pipe 32. In addition, the four-way switching valve 22 is connected to the communication pipe 31 via the gas stop valve 28, and is connected to the other end of the indoor heat exchanger 11 via the communication pipe 31. These communication pipes 31 and 32 form a collective communication pipe 7 together with the hose 6.

[0058] The outdoor fan 29 discharges the outdoor air to the outside after heat exchange in the outdoor heat exchanger 24. The fan motor 30 drives the outdoor fan 29 to rotate.

[0059] Furthermore, various sensors are disposed in the outdoor unit 3. Here, the outdoor unit 3 is disposed with an outdoor temperature sensor 33 and an outdoor humidity sensor 34.

[0060] The outdoor temperature sensor 33 detects the outdoor temperature. The outdoor humidity sensor 34 detects the outdoor humidity. The outdoor temperature sensor 33 and the outdoor humidity sensor 34 may be outdoor temperature and humidity sensors that detect the outdoor temperature and the outdoor humidity.

[0061] In addition, the outdoor temperature sensor 33 and the outdoor humidity sensor 34 may be arranged somewhere outdoors instead of being arranged in the outdoor unit 3 .

[0062] (2-2) Ventilation device

[0063] The ventilation device 1b includes a ventilation unit 4 and a hose 6. The ventilation unit 4 is arranged indoors or outdoors, and here, it is arranged outdoors. The hose 6 has an air supply path and an exhaust path. The air supply path sends outdoor air to the room during air supply operation, and the exhaust path sends indoor air to the outside during exhaust operation. Here, the hose 6 connects the ventilation unit 4 and the indoor unit 2. The hose 6 of this embodiment is a single component.

[0064] (2-2-1) Ventilation unit

[0065] The ventilation unit 4 is a unit capable of performing an air supply operation and an exhaust operation as ventilation operations.

[0066] The ventilation unit 4 of this embodiment is arranged on the upper part of the outdoor unit 3 and is integrated. The ventilation unit 4 includes a switching damper 43, which performs a switching operation from one of the air supply operation and the exhaust operation to the other operation. In other words, the switching damper 43 performs a switching operation from the air supply operation to the exhaust operation, and a switching operation from the exhaust operation to the air supply operation.

[0067] The switch damper 43 has a flow path switching component 431 and a radial fan 432. The flow path switching component 431 is a component that switches the air supply path and the exhaust path. Here, the flow path switching component 431 is a rotating component. The flow path switching component 431 forms an air supply path, and when the radial fan 432 is started, the outdoor air taken from the outside is supplied to the indoor unit 2 via the hose 6. On the other hand, the flow path switching component 431 forms an exhaust path, and when the radial fan 432 is started, the indoor air taken from the indoor unit 2 is discharged to the outside via the hose 6.

[0068] The ventilation unit 4 is provided with an air supply and exhaust port 41. The air supply and exhaust port 41 is an opening through which air taken in for delivery to the indoor unit 2 passes or air taken in from the indoor unit 2 and exhausted to the outside passes. The air supply and exhaust port 41 is formed in a housing of the ventilation unit 4.

[0069] (2-2-2) Hose

[0070] like Figure 1 and Figure 2 As shown, a hose 6 is provided between the ventilation unit 4 disposed outdoors and the indoor unit 2, and the hose 6 is used when supplying outdoor air from the ventilation unit 4 to the indoor unit 2 side, and when exhausting indoor air to the outdoors. Here, the hose 6 connects the ventilation unit 4 and the indoor unit 2. In detail, one end of the hose 6 is connected to a supply and exhaust port component (here, a wall portion) forming the supply and exhaust port 14 of the indoor unit 2, and the other end of the hose 6 is connected to the ventilation unit 4. Therefore, in the air supply operation, outdoor air is supplied to the indoor through the hose 6, and in the exhaust operation, indoor air is exhausted to the outdoors through the hose 6. In other words, the hose 6 is a component that constitutes an air supply path for outdoor air to pass through during the air supply operation, and is a component that constitutes an exhaust path for indoor air to pass through during the exhaust operation.

[0071] (2-3) Acquisition

[0072] Figure 3 The acquisition unit 110 shown in FIG. 1 acquires information related to the air quality of the outdoor air. Figure 3 In the embodiment, the acquisition unit 110 is included in the ventilation unit 4. In addition, the acquisition unit 110 only needs to be included in the configuration of the air-conditioning system 1, and may be included in the outdoor unit 3 or the indoor unit 2, for example.

[0073] The information acquired by the acquisition unit 110 is one or more information related to the air quality of outdoor air. The information is not particularly limited, and includes, for example, pollen, PM2.5, dust, sand, carbon monoxide, etc. Preferably, the information includes at least one of pollen, PM2.5, dust, and sand.

[0074] In addition, the information includes an evaluation of air quality. The evaluation is a numerical value related to air quality, a staged indicator, etc. Here, an example of information is given. One of the information is pollen, and the order from high to low in terms of the degree of poor air quality is "very much", "much", "slightly more", "little", and "unpublished". One of the information is PM2.5, and the order from high to low in terms of the degree of poor air quality is "extremely much", "very much", "much", "slightly more", "slightly less", "little", and "almost nothing". One of the information is yellow sand, and the order from high to low in terms of the degree of poor air quality is "very much", "much", "slightly more", and "little". One of the information is dust, which is the concentration of particles suspended in the air measured by a dust meter.

[0075] The means by which the acquisition unit 110 acquires information is not particularly limited, but in the present embodiment, the acquisition unit 110 acquires information related to the air quality of outdoor air from the server 101. The server 101 is an external server connected to the air conditioning system 1 in a communicable manner via a network such as the Internet. The acquisition unit 110 is implemented, for example, by a network interface that acquires (receives) information from the server 101 via a network. Furthermore, the acquisition unit 110 periodically acquires information related to the air quality of outdoor air from the server 101. For example, the acquisition unit 110 may acquire information at a predetermined time interval during the operation of the air conditioning device 1a or the ventilation device 1b, or may acquire information based on a request sent from the remote controller 102.

[0076] (2-4) Receiving section

[0077] The receiving unit 120 receives a request for at least one of the air-conditioning operation and the ventilation operation. Figure 3 In the embodiment, the receiving unit 120 is included in the indoor unit 2. In addition, the receiving unit 120 may be included in any one of the configurations of the air-conditioning system 1, and may be provided in the indoor unit 2, the outdoor unit 3, and the ventilation unit 4, for example.

[0078] Here, the receiving unit 120 receives a request for ventilation operation from the remote controller 102 installed in the room. The receiving unit 120 is implemented, for example, by a dedicated interface that receives (receives) the request from the remote controller 102. Specifically, the remote controller 102 is provided with a button for ventilation operation that automatically performs air supply operation and exhaust operation (in this embodiment, a button for "automatic ventilation mode"). When the user presses the button for ventilation operation of the remote controller 102, the remote controller 102 sends a request for ventilation operation to the receiving unit 120. Then, the receiving unit 120 receives the request for ventilation operation sent from the remote controller 102.

[0079] In addition, a button for selecting the air supply operation and the exhaust operation may be further provided on the remote controller 102. In this case, when the user presses the button for the air supply operation or the exhaust operation on the remote controller 102, the remote controller 102 sends a request for the air supply operation or the exhaust operation to the receiving unit 120. Then, the receiving unit 120 receives the request for the air supply operation or the exhaust operation sent from the remote controller 102.

[0080] Furthermore, a configuration may be adopted in which a request for ventilation operation or the like is sent from a communication terminal such as a smartphone to the receiving unit 120 instead of the remote controller 102. In this case, a dedicated application capable of performing user operations related to at least one of the air-conditioning operation and the ventilation operation is installed in the communication terminal, and the user performs a predetermined screen operation, thereby sending a predetermined request from the communication terminal to the receiving unit 120.

[0081] (2-5) Control Unit

[0082] (2-5-1)Outline

[0083] Figure 3 The control unit 130 shown is implemented by, for example, a computer. The computer includes, for example, a control operation device and a storage device. The control operation device can use a processor. The control unit 130 includes a CPU as a processor. The control operation device reads out a program stored in the storage device, and performs a predetermined image processing, operation processing, or timing processing according to the program. Furthermore, the control operation device can write the operation result to the storage device according to the program, or read out the information stored in the storage device. The storage device can be used as a database. The control unit 130 includes a memory as a storage device.

[0084] The control unit 130 of this embodiment is respectively provided in the indoor unit 2, the outdoor unit 3, and the ventilation unit 4. The control unit 130 is connected to each device of the indoor unit 2, the outdoor unit 3, and the ventilation unit 4, the outdoor temperature sensor 33, the outdoor humidity sensor 34, the indoor temperature sensor 15, and the indoor humidity sensor 16. The control unit 130 performs operation control of each device based on an operation instruction from the remote controller 102 or the like, or automatically according to various operations such as heating operation, cooling operation, dehumidification operation, air supply operation, and exhaust operation.

[0085] The control unit 130 can control to perform any one of cooling operation, dehumidification operation, heating operation, air supply operation and exhaust operation independently, and can control to perform air supply operation or exhaust operation during cooling operation, dehumidification operation or heating operation.

[0086] The control unit 130 is connected to the acquisition unit 110, the reception unit 120, and the remote controller 102 via a communication line or the like. For example, the ventilation unit 4 may not include the control unit 130. In this case, each device of the ventilation unit 4 is controlled by the control unit 130 included in the outdoor unit 3.

[0087] (2-5-2) Control of ventilation device

[0088] The control unit 130 of the present embodiment performs a ventilation operation that automatically switches between an air supply operation and an exhaust operation.

[0089] When receiving a request for a ventilation operation that automatically performs an air supply operation and an exhaust operation, the control unit 130 starts the air supply operation. Specifically, when receiving information that the request for the ventilation operation is received from the receiving unit 120, the control unit 130 rotates the flow path switching member 431 of the switching damper 43 so as to form an air supply path, and starts the radial fan 432. Thus, in this embodiment, the air supply operation is first started as the ventilation operation.

[0090] When the information on air quality satisfies the first condition, the control unit 130 switches from the air supply operation to the exhaust operation. The first condition is a condition that the supply of outdoor air to the room is stopped and the indoor air is exhausted to the outside because the air quality of the outdoor air is poor.

[0091] When the information satisfies the first condition, the control unit 130 rotates the flow path switching member 431 of the switching damper 43 so as to form an exhaust path, and activates the radial fan 432 .

[0092] If the information on the air quality does not satisfy the second condition during the exhaust operation, the controller 130 restarts the air supply operation. The second condition is a condition that the exhaust of indoor air to the outside is stopped and the outdoor air is supplied to the room because the air quality of the outdoor air is good.

[0093] The second condition may be the same as or different from the first condition. The second condition is preferably the same as or stricter than the first condition. When the second condition is stricter than the first condition, it is easier to continue the exhaust operation.

[0094] Here, an example of the first condition and the second condition is given. In the present embodiment, it is assumed that the second condition is a condition stricter than the first condition. When the judgment object in the information related to the air quality of outdoor air is pollen, the first condition is "more" or more, and the second condition is "slightly more" or more. When the judgment object in the information is PM2.5, the first condition is "more" or more, and the second condition is "slightly more" or more. When the judgment object in the information is yellow sand, the first condition is "more" or more, and the second condition is "slightly more" or more.

[0095] The first condition and the second condition may take one of the information related to the air quality as the judgment object, or may take multiple of the information related to the air quality as the judgment object. In the case where the first condition and the second condition have multiple judgment objects, if at least one of the judgment objects satisfies the condition, the condition is satisfied. Specifically, in the case where the first condition takes multiple of the information as the judgment object, if more than one of the information satisfies the first condition, the control unit 130 determines that the first condition is satisfied. In the case where the second condition takes multiple of the information as the judgment object, the control unit 130 determines that the second condition is satisfied when more than one of the information satisfies the second condition. In other words, in the case where the second condition takes multiple of the information as the judgment object, the control unit 130 determines that the second condition is not satisfied when all of the information of the judgment object does not satisfy the second condition.

[0096] Furthermore, the first condition and the second condition may be set to be changeable by the user. Furthermore, the first condition and the second condition may be set to be able to determine the validity and invalidity of the judgment object in the information related to the plurality of air qualities by the user. Furthermore, the first condition and the second condition may be conditions obtained by weighting the plurality of judgment objects respectively.

[0097] After receiving the request for ventilation operation and starting the air supply operation, the control unit 130 continues the air supply operation for a predetermined time regardless of the first condition. In other words, when the air supply operation is started, the control unit 130 continues the air supply operation for a predetermined time regardless of the air quality of the outdoor air. The predetermined time is, for example, more than 1 minute, and in this embodiment, more than 3 minutes.

[0098] Furthermore, when a predetermined time has passed after the first condition is satisfied and the exhaust operation is switched, the control unit 130 switches to the air supply operation regardless of the first condition. In other words, regardless of the air quality of the outdoor air, the control unit 130 does not continue the exhaust operation for a predetermined time but performs the air supply operation. The predetermined time is, for example, more than 1 minute, and in the present embodiment, more than 3 minutes.

[0099] In addition, the predetermined time for which the air supply operation is continued after the start of the air supply operation and the predetermined time for which the exhaust operation is not continued may be the same as or different from each other.

[0100] As described above, the control unit 130 of the present embodiment basically performs the air supply operation as the ventilation operation, and temporarily performs the exhaust operation according to the condition of the air quality of the outdoor air.

[0101] (3) Operation

[0102] Next, the operation of the air conditioning system 1 is described. The air conditioning system 1 of this embodiment performs heating operation, cooling operation and dehumidification operation as air conditioning operation, and performs air supply operation and exhaust operation as ventilation operation. The various operations are performed by the control unit 130 controlling each component device.

[0103] (3-1) Refrigeration operation

[0104] During cooling operation, the controller 130 switches the four-way switching valve 22 to a state in which the outdoor heat exchanger 24 functions as a radiator of the refrigerant and the indoor heat exchanger 11 functions as an evaporator of the refrigerant.

[0105] In such a state of the refrigerant circuit, Figure 2 As shown, the low-pressure refrigerant in the refrigeration cycle is sucked into the compressor 21, compressed to the high pressure in the refrigeration cycle, and then discharged. The high-pressure gas refrigerant discharged from the compressor 21 is sent to the outdoor heat exchanger 24 through the four-way switching valve 22. The high-pressure refrigerant sent to the outdoor heat exchanger 24 exchanges heat with the outdoor air supplied by the outdoor fan 29 in the outdoor heat exchanger 24 to dissipate heat. The high-pressure refrigerant after dissipating heat in the outdoor heat exchanger 24 is sent to the expansion valve 25 and is decompressed to the low pressure in the refrigeration cycle. The low-pressure refrigerant after being decompressed in the expansion valve 25 is sent to the indoor heat exchanger 11 through the filter 26, the liquid stop valve 27 and the communication pipe 32. The low-pressure refrigerant sent to the indoor heat exchanger 11 exchanges heat with the indoor air supplied by the indoor fan 12 in the indoor heat exchanger 11 and evaporates. As a result, the indoor air is cooled and blown into the room. The low-pressure refrigerant evaporated in the indoor heat exchanger 11 passes through the communication pipe 31 , the gas shutoff valve 28 , the four-way switching valve 22 , and the accumulator 23 , and is sucked into the compressor 21 again.

[0106] Thus, in cooling operation, the controller 130 causes the refrigerant sealed in the refrigerant circuit to circulate in the order of the compressor 21 , the outdoor heat exchanger 24 , the expansion valve 25 , and the indoor heat exchanger 11 .

[0107] (3-2) Dehumidification operation

[0108] When performing the dehumidification operation, the control unit 130 switches the four-way switching valve 22 in the same manner as the cooling operation, so that the outdoor heat exchanger 24 functions as a radiator of the refrigerant and the indoor heat exchanger 11 functions as an evaporator of the refrigerant. Furthermore, in the dehumidification operation, the control unit 130 circulates the refrigerant sealed in the refrigerant circuit in the order of the compressor 21, the outdoor heat exchanger 24, the expansion valve 25, and the indoor heat exchanger 11 in the same manner as the cooling operation.

[0109] (3-3) Heating operation

[0110] During the heating operation, the controller 130 switches the four-way switching valve 22 to a state in which the outdoor heat exchanger 24 functions as an evaporator of the refrigerant and the indoor heat exchanger 11 functions as a radiator of the refrigerant.

[0111] In the refrigerant circuit in such a state, the low-pressure refrigerant in the refrigeration cycle is sucked into the compressor 21, and is discharged after being compressed to the high pressure in the refrigeration cycle. The high-pressure refrigerant discharged from the compressor 21 is sent to the indoor heat exchanger 11 through the four-way switching valve 22, the gas stop valve 28 and the communication pipe 31. The high-pressure refrigerant sent to the indoor heat exchanger 11 exchanges heat with the indoor air supplied by the indoor fan 12 in the indoor heat exchanger 11 to dissipate heat. As a result, the indoor air is heated and blown indoors. The high-pressure refrigerant after dissipating heat in the indoor heat exchanger 11 is sent to the expansion valve 25 through the communication pipe 32, the liquid stop valve 27 and the filter 26, and is decompressed to the low pressure in the refrigeration cycle. The low-pressure refrigerant after being decompressed in the expansion valve 25 is sent to the outdoor heat exchanger 24. The low-pressure refrigerant sent to the outdoor heat exchanger 24 exchanges heat with the outdoor air supplied by the outdoor fan 29 in the outdoor heat exchanger 24 and evaporates. The low-pressure refrigerant evaporated in the outdoor heat exchanger 24 passes through the four-way switching valve 22 and the accumulator 23 and is sucked into the compressor 21 again.

[0112] Thus, in the heating operation, the controller 130 causes the refrigerant sealed in the refrigerant circuit to circulate in the order of the compressor 21 , the indoor heat exchanger 11 , the expansion valve 25 , and the outdoor heat exchanger 24 .

[0113] (3-4) Gas supply operation

[0114] When the air supply operation is performed, the control unit 130 rotates the flow path switching member 431 of the switching damper 43 so as to form an air supply path, and starts the radial fan 432. When the radial fan 432 is started, outdoor air is taken into the ventilation unit 4 from the air supply and exhaust port 41 of the ventilation unit 4. The outdoor air passes through the air supply path formed by the flow path switching member 431 and is transported from the air supply and exhaust port 14 to the indoor unit 2 via the hose 6. The outdoor air supplied to the indoor unit 2 is blown into the room from the blow-out port 19 via the indoor heat exchanger 11.

[0115] In this way, the outdoor air taken in from the outside is guided into the room through the flow path connecting the air supply and exhaust port 41 , the switching damper 43 , and the hose 6 .

[0116] (3-5) Exhaust operation

[0117] When performing the exhaust operation, the control unit 130 rotates the flow path switching member 431 of the switching damper 43 so as to form an exhaust path, and starts the radial fan 432. When the radial fan 432 is started, the indoor air taken in from the suction port 18 of the indoor unit 2 is made to reach the ventilation unit 4 from the supply and exhaust port 14 through the hose 6. Then, the indoor air passes through the exhaust path formed by the flow path switching member 431 and is discharged from the supply and exhaust port 41 to the outside.

[0118] In this way, the indoor air taken in from the indoor unit 2 passes through the flow path in the opposite direction to that during the air supply operation, and is discharged from the ventilation unit 4 to the outside.

[0119] (4) Control method of ventilation operation

[0120] Next, the main reference Figure 4 A method of controlling the ventilation operation by which the air supply operation and the exhaust operation are automatically switched by the control unit 130 will be described.

[0121] like Figure 4 As shown, it is checked whether the user has selected the "automatic ventilation mode" of the remote controller 102 as the ventilation operation (step S1). Specifically, the control unit 130 determines whether the receiving unit 120 has received a request for ventilation operation from the remote controller 102. When the receiving unit 120 has received a request for ventilation operation from the remote controller 102, the receiving unit 120 sends the request for ventilation operation to the control unit 130. When the control unit 130 receives the request for ventilation operation from the receiving unit 120, it determines that the "automatic ventilation mode" is selected. In step S1, when the "automatic ventilation mode" is selected, transfer to step S2.

[0122] In step S2 , the control unit 130 controls the switching damper 43 so as to establish the air supply path, and starts the air supply operation.

[0123] Next, the control unit 130 determines whether the air supply operation has continued for a predetermined time (step S3). In this step S3, the air supply operation is continued for a predetermined time regardless of the first condition. In other words, even when the air quality of the outdoor air is poor, the air supply operation is continued for a predetermined time after the air supply operation is started. The predetermined time here is, for example, 3 minutes. When the air supply operation has continued for a predetermined time, the process proceeds to step S4.

[0124] In step S4, the control unit 130 determines whether the information related to the air quality of the outdoor air satisfies the first condition. In this step S4, the information related to the air quality of the outdoor air obtained by the acquisition unit 110 is sent to the control unit 130. The control unit 130 that receives the information determines whether the information satisfies the first condition. In addition, the acquisition unit 110 periodically acquires the information related to the air quality of the outdoor air from the server 101. For example, the acquisition unit 110 may acquire the information at a predetermined time interval during the operation of the air conditioning device 1a or the ventilation device 1b, or may acquire the information according to the request from the control unit 130 in step S4.

[0125] For example, suppose that the first condition is that pollen is "a lot" or more, and PM2.5 is "a lot" or more. Suppose that the information related to air quality obtained by the acquisition unit 110 is "a lot of pollen" and "a little bit of PM2.5". In this case, PM2.5 is "a lot" or more, which does not satisfy the first condition, but pollen is "a lot" or more, which satisfies the first condition. Therefore, the control unit 130 determines that the first condition is satisfied. On the other hand, suppose that the information related to air obtained by the acquisition unit 110 is "a little bit of pollen" and "a little bit of PM2.5". In this case, since all the judgment objects of the first condition are not satisfied, the control unit 130 determines that the first condition is not satisfied.

[0126] In step S4, when the control unit 130 determines that the information satisfies the first condition, the process proceeds to step S5. On the other hand, in step S4, when the control unit 130 determines that the information does not satisfy the first condition, the process proceeds to step S10.

[0127] In step S10, it is checked whether the request for ventilation operation is ended. Here, it is checked whether the user has canceled the "automatic ventilation mode" of the remote controller 102. In step S10, if the "automatic ventilation mode" is ended, the ventilation operation is ended. In step S10, if the "automatic ventilation mode" is not ended, the air supply operation is continued, and the process returns to the step of determining whether the information satisfies the first condition (step S4).

[0128] In step S5, since the air quality of the outdoor air is poor, the control unit 130 switches from the air supply operation to the exhaust operation. Here, the control unit 130 controls the switching damper 43 so that the air supply path becomes the exhaust path, and starts the exhaust operation.

[0129] Next, the control unit 130 determines whether the information on the air quality of the outdoor air does not satisfy the second condition (step S6). In step S6, the information on the air quality of the outdoor air acquired by the acquisition unit 110 is sent to the control unit 130. The control unit 130 that receives the information determines whether the information does not satisfy the second condition.

[0130] For example, suppose that the second condition is that pollen is "slightly more" or more, and PM2.5 is "slightly more" or more. Suppose that the information related to air quality obtained by the acquisition unit 110 is "pollen is slightly more" and "PM2.5 is less". In this case, PM2.5 is "slightly more" or more, which does not meet the second condition, but pollen is "slightly more" or more, which meets the second condition, so the control unit 130 determines that the second condition is met. On the other hand, suppose that the information related to air obtained by the acquisition unit 110 is "pollen is slightly less" and "PM2.5 is slightly less". In this case, since all the judgment objects of the second condition are not met, the control unit 130 determines that the second condition is not met.

[0131] In step S6, when the control unit 130 determines that the information does not satisfy the second condition, the process proceeds to step S7. In step S7, since the air quality of the outdoor air has improved, the air supply operation is restarted. In step S7, the control unit 130 controls the switching damper 43 in such a way that the exhaust path becomes the air supply path. Then, the process proceeds to the process of checking whether the ventilation operation request has ended (step S10). In step S10, when the "automatic ventilation mode" of the remote controller 102 has ended, the ventilation operation is ended. On the other hand, in step S10, when the "automatic ventilation mode" has not ended, the process returns to the process of determining whether the air quality satisfies the first condition (step S4).

[0132] On the other hand, in step S6, when the control unit 130 determines that the information satisfies the second condition, the process proceeds to step S8. In step S8, the control unit 130 determines whether a predetermined time has passed after switching to the exhaust operation (step S5). The predetermined time here is, for example, 3 minutes.

[0133] In step S8, when the exhaust operation has not been continued for the predetermined time, the exhaust operation is continued, and the process returns to the step of determining whether the information on the air quality does not satisfy the second condition (step S6).

[0134] On the other hand, in step S8, when the exhaust operation continues for a predetermined time, the process proceeds to step S9. In this step S9, the process switches to the air supply operation regardless of the first condition. In other words, even when the air quality of the outdoor air is poor, the exhaust operation is not continued for more than a predetermined time, but the air supply operation is temporarily started. The air supply operation in step S9 is performed for a predetermined time. The predetermined time here is, for example, 3 minutes. Furthermore, in step S9, the control unit 130 controls the switching damper 43 so that the exhaust path becomes the air supply path. When the air supply operation is performed for a predetermined time, the process returns to the process of switching to the exhaust operation (step S5).

[0135] (5) Features

[0136] (5-1)

[0137] The air conditioning system 1 of this embodiment includes an acquisition unit 110, a receiving unit 120, and a control unit 130. The acquisition unit 110 acquires information related to the air quality of outdoor air. The receiving unit 120 receives a request for ventilation operation. The control unit 130 performs an air supply operation for supplying outdoor air to the room and an exhaust operation for exhausting indoor air to the outside as ventilation operation. When receiving a request for ventilation operation, the control unit 130 starts the air supply operation, and switches from the air supply operation to the exhaust operation when the above information satisfies the first condition.

[0138] According to the air conditioning system 1 of the present embodiment, the air supply operation is started when a request for ventilation operation is received, so that the ventilation amount can be ensured. Furthermore, when the information related to the air quality of the outdoor air satisfies the first condition, in other words, when the outdoor environment deteriorates, the air supply operation is switched to the exhaust operation. Therefore, the exhaust operation as the ventilation operation can be performed in a state where the outdoor air of the air quality satisfying the first condition is suppressed from being introduced into the room. Therefore, the air conditioning system 1 of the present embodiment can perform one of the air supply operation and the exhaust operation according to the air quality of the outdoor air.

[0139] As described above, the air conditioning system 1 of the present embodiment basically performs the air supply operation, and supplementarily performs the exhaust operation when the air quality of the outdoor air is poor, thereby achieving both ensuring the ventilation volume and maintaining the indoor air quality.

[0140] (5-2)

[0141] In the air conditioning system 1 of the present embodiment, when the above information does not satisfy the second condition during the exhaust operation, the control unit 130 restarts the air supply operation.

[0142] Here, when the information about the air quality of the outdoor air does not satisfy the second condition, in other words, when the outdoor environment is improved, the exhaust operation is switched to the air supply operation. Therefore, outdoor air of air quality that does not satisfy the second condition can be introduced into the room. Therefore, the indoor air quality can be appropriately maintained, and the ventilation volume based on the air supply operation can be increased.

[0143] (5-3)

[0144] In the air conditioning system 1 of the present embodiment, the acquisition unit 110 acquires the above information from the server 101. In this way, the information on the air quality may be acquired from the server 101.

[0145] (5-4)

[0146] In the air conditioning system 1 of the present embodiment, the information includes at least one of pollen, PM2.5, dust, and yellow sand.

[0147] Here, one of the air supply operation and the exhaust operation can be performed according to at least one of pollen, PM2.5, dust and sand in the outdoor air. Therefore, at least one of pollen, PM2.5, dust and sand can be appropriately maintained indoors.

[0148] (5-5)

[0149] In the air conditioning system 1 of the present embodiment, after starting the air supply operation, the control unit 130 continues the air supply operation for a predetermined time regardless of the first condition.

[0150] Here, when the ventilation operation request is received and the air supply operation is started, the air supply operation is continued for a predetermined time. Therefore, when the user issues a ventilation operation request, a sufficient ventilation amount can be ensured.

[0151] (5-6)

[0152] In the air conditioning system 1 of the present embodiment, when a predetermined time has elapsed after the switching to the exhaust operation, the control unit 130 switches to the air supply operation regardless of the first condition.

[0153] Here, when the exhaust operation is performed for a predetermined time, the air supply operation can be temporarily performed, so that a sufficient ventilation volume can be ensured.

[0154] (5-7)

[0155] In the air conditioning system 1 of the present embodiment, the air supply path for sending outdoor air to the room during the air supply operation and the exhaust path for sending indoor air to the outside during the exhaust operation are shared.

[0156] Here, since the air supply path and the exhaust path are shared, the path through which the outdoor air and the indoor air pass can be enlarged, thereby increasing the air supply amount and the exhaust amount.

[0157] (5-8)

[0158] The air conditioning system 1 of this embodiment further includes a hose 6, a ventilator 1b, and an indoor unit 2. The hose 6 has a common air supply path and an exhaust path. The ventilator 1b is installed outdoors and performs air supply operation and exhaust operation. The indoor unit 2 is connected to the ventilator 1b via the hose 6.

[0159] Here, the hose 6 through which the outdoor air for supply and the indoor air for exhaust pass is common, and therefore, the air conditioning system 1 that increases the amount of air supply and exhaust can be easily realized.

[0160] (5-9)

[0161] The air conditioning system 1 of the present embodiment further includes a switching damper 43. The switching damper 43 performs a switching operation of switching from one of the air supply operation and the exhaust operation to the other operation.

[0162] Here, by switching the damper 43 , the air supply operation and the exhaust operation can be easily switched.

[0163] (6) Modification

[0164] (6-1) Modification 1

[0165] In the above-mentioned embodiment, the acquisition unit 110 acquires information related to the air quality of outdoor air from the server 101, but is not limited thereto. In this variation, the air conditioning system further includes an outdoor sensor for detecting information related to air quality. The outdoor sensor is disposed at the outdoor unit 3 or somewhere outdoors. The acquisition unit 110 acquires information related to air quality from the outdoor sensor. In this case, the acquisition unit 110 is implemented by the outdoor sensor itself or an interface for receiving information from the outdoor sensor. The acquisition unit 110 periodically acquires detection results from the outdoor sensor. For example, the acquisition unit 110 may also acquire information at specified time intervals during the operation of the air conditioning device 1a or the ventilation device 1b.

[0166] (6-2) Modification 2

[0167] In the above embodiment, after the air supply operation is restarted (step S7), the air supply operation is not continued for a predetermined time, but the air supply operation and the exhaust operation are selected based on the first condition (step S4), but this is not limited to this. Figure 5 As shown, after the air supply operation is restarted (step S7), the air supply operation is continued for a predetermined time (step S3) regardless of the first condition.

[0168] Specifically, after the control unit 130 switches from the exhaust operation to the air supply operation when the second condition is not satisfied, the air supply operation is continued for a predetermined time regardless of the first condition. In other words, when the air supply operation is restarted, the control unit 130 continues the air supply operation for a predetermined time regardless of the air quality of the outdoor air. The predetermined time is, for example, more than 1 minute, and in this modified example, more than 3 minutes.

[0169] As a control method, a step of resuming the air supply operation (step S7) is implemented. In step S10, if the "automatic ventilation mode" has not ended, the process returns to the step of determining whether the air supply operation has elapsed for a predetermined time (step S3).

[0170] As described above, in the present modification, the control unit 130 always continues the air supply operation for a predetermined time after starting and restarting the air supply operation. Therefore, according to the present modification, the ventilation volume can be further ensured.

[0171] (6-3) Modification 3

[0172] In the above embodiment, the control of the ventilation operation alone in which the air supply operation and the exhaust operation are switched by the controller 130 is described. However, the air conditioning system 1 of the present disclosure may perform the ventilation operation of the above embodiment during the air conditioning operation.

[0173] (6-3-1) Control Unit

[0174] The control unit 130 has a third condition for switching from the air supply operation to the exhaust operation during at least one of the cooling operation and the heating operation. The third condition is a condition that makes it easier to switch to the exhaust operation than the first condition.

[0175] When the temperature of the outdoor air is above the specified temperature or the humidity of the outdoor air is above the specified humidity during cooling operation, or when the temperature of the outdoor air is below the specified temperature or the humidity of the outdoor air is below the specified humidity during heating operation, if the third condition is met, the control unit 130 switches from air supply operation to exhaust operation.

[0176] The prescribed temperature and the prescribed humidity can be set arbitrarily. The prescribed temperature is, for example, a temperature set by the remote controller 102 and a temperature of the outdoor air that differs by 5°C or more. The prescribed humidity is, for example, a humidity set by the remote controller 102 and a humidity of the outdoor air that differs by 5% or more. The temperature of the outdoor air is a value measured by the outdoor temperature sensor 33. The humidity of the outdoor air is a value measured by the outdoor humidity sensor 34.

[0177] Furthermore, when the information on the air quality does not satisfy the fourth condition during the exhaust operation, the control unit 130 restarts the air supply operation.

[0178] The fourth condition may be the same as or different from the third condition. Preferably, the fourth condition is the same as or stricter than the third condition. When the fourth condition is stricter than the third condition, it is easy to continue the exhaust operation.

[0179] Here, an example of the third condition and the fourth condition is given. In the present embodiment, it is assumed that the fourth condition is a condition stricter than the third condition. When the judgment object in the information related to the air quality of outdoor air is pollen, the third condition is "slightly more" or more, and the fourth condition is "less" or more. When the judgment object in the information is PM2.5, the third condition is "slightly more" or more, and the fourth condition is "slightly less" or more. When the judgment object in the information is yellow sand, the third condition is "slightly more" or more, and the fourth condition is "less" or more.

[0180] The third condition and the fourth condition may take one of the information related to the air quality as the judgment object, or may take multiple of the information related to the air quality as the judgment object. In the case where the third condition and the fourth condition have multiple judgment objects, if at least one judgment object satisfies the condition, the condition is satisfied. Specifically, in the case where the third condition takes multiple of the information as the judgment object, if more than one of the information satisfies the third condition, the control unit 130 determines that the third condition is satisfied. In the case where the fourth condition takes multiple of the information as the judgment object, if more than one of the information satisfies the fourth condition, the control unit 130 determines that the fourth condition is satisfied. In other words, in the case where the fourth condition takes multiple of the information as the judgment object, the control unit 130 judges that the fourth condition is not satisfied when all of the information of the judgment object does not satisfy the fourth condition.

[0181] Furthermore, the third condition and the fourth condition may be set to be changeable by the user. Furthermore, the third condition and the fourth condition may be set to be able to determine the validity and invalidity of the judgment object in the information related to the plurality of air qualities by the user. Furthermore, the third condition and the fourth condition may be conditions obtained by weighting the plurality of judgment objects respectively.

[0182] (6-3-2) Operation

[0183] (6-3-2-1) Air supply operation during air conditioning operation

[0184] The control unit 130 controls the air conditioner 1 a to perform the cooling operation, the dehumidifying operation, or the heating operation, and the ventilator 1 b to perform the air supply operation.

[0185] Specifically, according to the above-mentioned air supply operation, the ventilation unit 4 supplies outdoor air to the air supply and exhaust port 14 of the indoor unit 2 via the hose 6. The outdoor air is supplied to the room after being cooled, dehumidified or heated by the indoor heat exchanger 11. Therefore, the outdoor air introduced by the ventilation device 1b is supplied to the room together with the indoor air cooled, dehumidified or heated by the air conditioning device 1a.

[0186] (6-3-2-2) Exhaust operation during air conditioning operation

[0187] The control unit 130 controls the air conditioner 1 a to perform the cooling operation, the dehumidifying operation, or the heating operation, and the ventilator 1 b to perform the exhaust operation.

[0188] Specifically, according to the exhaust operation described above, the ventilation unit 4 supplies indoor air from the air supply and exhaust port 14 of the indoor unit 2 to the ventilation unit 4 via the hose 6. The indoor air is exhausted to the outside from the ventilation unit 4. Therefore, a part of the indoor air is exhausted to the outside by the ventilation device 1b, and another part of the indoor air is supplied to the room after being cooled, dehumidified or heated by the indoor heat exchanger 11 of the air conditioning device 1a.

[0189] (6-3-3) Control method of ventilation operation during cooling operation and heating operation

[0190] Next, the main reference Fig. 6A and Figure 6B A method of controlling the ventilation operation by the control unit 130 to automatically switch between the air supply operation and the exhaust operation during the cooling operation or the heating operation as the air-conditioning operation will be described.

[0191] First, if Fig. 6A As shown, similarly to the above-described embodiment, it is checked whether the user has selected the "automatic ventilation mode" of the remote controller 102 as the ventilation operation (step S1). In step S1, if the "automatic ventilation mode" is selected, the process proceeds to step S2.

[0192] In step S2, similarly to the above-described embodiment, the control unit 130, which has received the request for the ventilation operation from the reception unit 120, starts the air supply operation.

[0193] Next, similarly to the above embodiment, the control unit 130 determines whether the air supply operation has continued for a predetermined time (step S3). In step S3, if the air supply operation has not continued for the predetermined time, the air supply operation is continued. On the other hand, if the air supply operation has continued for the predetermined time, the process proceeds to step S11.

[0194] In step S11, the control unit 130 determines whether the cooling operation or the heating operation is being performed. In step S11, if it is determined that the cooling operation and the heating operation are not being performed, Figure 6B As shown, transfer to step S4.

[0195] On the other hand, when it is determined in step S11 that cooling operation or heating operation is being performed, the process proceeds to step S12. In step S12, it is determined whether the temperature of the outdoor air is above a prescribed temperature or the humidity of the outdoor air is above a prescribed humidity during cooling operation, or whether the temperature of the outdoor air is below a prescribed temperature or the humidity of the outdoor air is below a prescribed humidity during heating operation. If the temperature of the outdoor air is not above a prescribed temperature or the humidity of the outdoor air is not above a prescribed humidity during cooling operation, or if the temperature of the outdoor air is not below a prescribed temperature or the humidity of the outdoor air is not below a prescribed humidity during heating operation, the process proceeds to step S12. Figure 6B On the other hand, in step S11, when the temperature of the outdoor air is above the prescribed temperature or the humidity of the outdoor air is above the prescribed humidity during cooling operation, or when the temperature of the outdoor air is below the prescribed temperature or the humidity of the outdoor air is below the prescribed humidity during heating operation, transfer to step S13.

[0196] In step S13, the control unit 130 determines whether the air quality of the outdoor air satisfies the third condition. In step S13, the information on the air quality of the outdoor air acquired by the acquisition unit 110 is sent to the control unit 130. The control unit 130 that receives the information determines whether the information satisfies the third condition.

[0197] For example, suppose that the third condition is that pollen is "slightly more" or more, and PM2.5 is "slightly more" or more. Suppose that the information related to air quality obtained by the acquisition unit 110 is "pollen is slightly more" and "PM2.5 is slightly less". In this case, PM2.5 is "slightly more" or more, which does not satisfy the third condition, but pollen is "slightly more" or more, which satisfies the third condition, so the control unit 130 determines that the third condition is satisfied. On the other hand, the information related to air obtained by the acquisition unit 110 is "less pollen" and "slightly less PM2.5". In this case, since all the judgment objects of the third condition are not satisfied, the control unit 130 determines that the third condition is not satisfied.

[0198] In step S13, when the control unit 130 determines that the information satisfies the third condition, the process proceeds to step S14. On the other hand, in step S13, when the control unit 130 determines that the information does not satisfy the third condition, the process proceeds to step S10.

[0199] In step S14, the control unit 130 switches from the air supply operation to the exhaust operation. Here, the control unit 130 controls the switching damper 43 to start the exhaust operation.

[0200] Next, the control unit 130 determines whether the information on the air quality of the outdoor air does not satisfy the fourth condition (step S15). In step S15, the information on the air quality of the outdoor air acquired by the acquisition unit 110 is sent to the control unit 130. The control unit 130 that receives the information determines whether the information does not satisfy the fourth condition.

[0201] For example, suppose that the fourth condition is that pollen is "less" or more and PM2.5 is "slightly less" or more. Suppose that the information related to air quality obtained by the acquisition unit 110 is "less pollen" and "less PM2.5". In this case, PM2.5 that does not meet the fourth condition is "slightly less" or more, but pollen that meets the fourth condition is "less" or more, so the control unit 130 determines that the second condition is met. On the other hand, suppose that the information related to air obtained by the acquisition unit 110 is "pollen not published" and "less PM2.5". In this case, since all the judgment objects of the fourth condition are not met, the control unit 130 determines that the fourth condition is not met.

[0202] In step S15, when the control unit 130 determines that the information does not satisfy the fourth condition, the process proceeds to step S7. In step S7, the air supply operation is restarted in the same manner as in the above-described embodiment.

[0203] On the other hand, when the control unit 130 determines in step S15 that the fourth condition is satisfied, the process proceeds to step S10.

[0204] As described above, when it is determined in step S11 that the cooling operation or the heating operation is not being performed, or when it is determined in step S12 that the temperature of the outdoor air is not above the prescribed temperature or the humidity of the outdoor air is not above the prescribed humidity during the cooling operation, or when it is determined in step S12 that the temperature of the outdoor air is not below the prescribed temperature or the humidity of the outdoor air is not below the prescribed humidity during the heating operation, the control is transferred to step S21. Figure 6B In step S4, similarly to the above-described embodiment, the control unit 130 determines whether the information on the air quality of the outdoor air satisfies the first condition.

[0205] In step S4, if the control unit 130 determines that the information does not satisfy the first condition, the process proceeds to step S4. Fig. 6A On the other hand, in step S4, when the control unit 130 determines that the information satisfies the first condition, the process proceeds to step S5.

[0206] In step S5, the control unit 130 switches from the air supply operation to the exhaust operation similarly to the above embodiment. Thereafter, similarly to the above embodiment, the control unit 130 determines whether the information on the air quality of the outdoor air does not satisfy the second condition (step S6).

[0207] In step S6, if the control unit 130 determines that the information does not satisfy the second condition, the process proceeds to step S6. Fig. 6A In step S7, the air supply operation is restarted in the same manner as in the above-mentioned embodiment.

[0208] On the other hand, in step S6, when the control unit 130 determines that the information satisfies the second condition, the process proceeds to step S8. In step S8, similarly to the above embodiment, the control unit 130 determines whether a predetermined time has passed after switching to the exhaust operation (step S5).

[0209] In step S8, if the exhaust operation has not continued for a predetermined time, the process returns to the step of determining whether the information related to the air quality does not satisfy the second condition (step S6). On the other hand, in step S8, if the exhaust operation has continued for a predetermined time, the process transfers to step S9. In step S9, similarly to the above-mentioned embodiment, the process switches to the air supply operation regardless of the first condition. When the air supply operation has been performed for a predetermined time, the process returns to the process of switching to the exhaust operation (step S5).

[0210] As described above, when it is determined that the third condition is not satisfied in step S13, when it is determined that the fourth condition is satisfied in step S15, when it is determined that the first condition is not satisfied in step S4, and when the air supply operation is restarted in step S7, the process proceeds to step S10. In step S10, similarly to the above-mentioned embodiment, it is checked whether the ventilation operation request is terminated. In step S10, when the "automatic ventilation mode" is terminated, the ventilation operation is terminated. On the other hand, in step S10, when the "automatic ventilation mode" is not terminated, the air supply operation is continued.

[0211] In addition, here, as an air conditioning operation, the control of the ventilation operation in which the air supply operation and the exhaust operation are automatically switched in the cooling operation or the heating operation is described, but the air supply operation and the exhaust operation may be automatically switched in the dehumidification operation. In this case, when the temperature of the outdoor air is above a prescribed temperature or the humidity of the outdoor air is above a prescribed humidity in the dehumidification operation, the control unit 130 switches from the air supply operation to the exhaust operation when the third condition is satisfied. Alternatively, when the humidity of the outdoor air is above a prescribed humidity in the dehumidification operation, the control unit 130 switches from the air supply operation to the exhaust operation when the third condition is satisfied. In this case, for example, the prescribed temperature of the dehumidification operation is higher than the prescribed temperature of the cooling operation, and the prescribed humidity of the dehumidification operation is lower than the prescribed humidity of the cooling operation.

[0212] (6-3-4) Features

[0213] (6-3-4-1)

[0214] In the air conditioning system 1 of this modification, the control unit 130 performs at least one of cooling operation and heating operation. The control unit 130 has a third condition for switching from air supply operation to exhaust operation during at least one of cooling operation and heating operation. The third condition is a condition that makes it easier to switch to exhaust operation than the first condition.

[0215] Here, the control unit 130 has a third condition that makes it easy to switch to the exhaust operation during the cooling operation and the heating operation. Therefore, it is possible to easily switch from the air supply operation to the exhaust operation during the cooling operation and the heating operation.

[0216] (6-3-4-2)

[0217] In the air-conditioning system 1 of this variant, when the temperature of the outdoor air is above a specified temperature or the humidity of the outdoor air is above a specified humidity during cooling operation, or when the temperature of the outdoor air is below a specified temperature or the humidity of the outdoor air is below a specified humidity during heating operation, if the third condition is met, the control unit 130 switches from air supply operation to exhaust operation.

[0218] Here, when the temperature or humidity of the outdoor air is high during cooling operation, and when the temperature or humidity of the outdoor air is low during heating operation, the third condition is executed to easily switch to exhaust operation. Therefore, it is possible to prevent high-temperature or high-humidity outdoor air from being introduced into the room during cooling operation, and it is possible to prevent low-temperature or low-humidity outdoor air from being introduced into the room during heating operation. Therefore, it is possible to prevent the reduction in the efficiency of cooling operation and heating operation.

[0219] (6-4) Modification 4

[0220] In the above embodiment, after the air supply operation starts, and in the first modification, after the air supply operation is restarted, the predetermined time is continued regardless of the air quality of the outdoor air, but the present invention is not limited thereto. In the case where the air quality of the indoor air is prioritized over the ventilation volume, the control unit 130 switches to the exhaust operation when the first condition is satisfied during the air supply operation.

[0221] (6-5) Modification 5

[0222] In the above-described embodiment, the hose 6 and the air supply and exhaust port 14 are described as examples of the members forming the air supply path and the air exhaust path, but the present invention is not limited thereto.

[0223] For example, the member forming the air supply path and the exhaust path may be a hose 6, and the air supply port and the exhaust port may be separately formed in the indoor unit 2. In this case, during the air supply operation, outdoor air is supplied to the room from the hose 6 via the air supply port, and during the exhaust operation, indoor air is introduced into the hose 6 via the exhaust port. In addition, the member forming the air supply path and the exhaust path is not limited to the hose 6.

[0224] Furthermore, for example, the air supply path and the exhaust path may not be shared. In other words, the hose constituting the air supply path and the hose constituting the exhaust path may be separate components.

[0225] (6-6) Modification 6

[0226] In the above embodiment, the air conditioning system 1 that performs the air supply operation and the exhaust operation as the ventilation operation is described as an example, but the present invention is not limited thereto. The air conditioning system of this modified example further performs the humidification operation as the ventilation operation.

[0227] The humidification operation is similar to the air supply operation in that outdoor air is supplied to the room, but is different in that the outdoor air is humidified and supplied to the room.

[0228] (6-7) Modification 7

[0229] In the above embodiment, the air conditioning system 1 that performs cooling operation, dehumidification operation and heating operation is described as an example, but the air conditioning system of the present disclosure is not limited to this as long as it can perform ventilation operation. The air conditioning system of this modified example can perform ventilation operation exclusively for cooling.

[0230] (6-8) Modification 8

[0231] In the above embodiment, the ventilation unit 4 is provided in the outdoor unit 3 , but the present invention is not limited thereto. The ventilation unit of this modification is provided in the indoor unit 2 .

[0232] (6-9) Modification 9

[0233] In the above-mentioned embodiment, the wall-mounted indoor unit 2 is described as an example, but the indoor unit of the present invention is not limited thereto. The indoor unit of the present disclosure can adopt any type such as a ceiling-mounted type or a floor-standing type.

[0234] (6-10) Modification 10

[0235] In the above-mentioned embodiment, the air conditioning system 1 including one indoor unit 2 is described as an example, but the air conditioning system of the present disclosure is not limited thereto. The air conditioning system of the present disclosure can also be applied to a multi-type air conditioning system including a plurality of indoor units 2 .

[0236] As mentioned above, although embodiment of this disclosure is described, it should be understood that various changes in form and detail are possible without departing from the spirit and scope of this disclosure described in the claims.

[0237] Description of symbols

[0238] 1: Air conditioning system

[0239] 1a: Air conditioning unit

[0240] 1b: Ventilation device

[0241] 2: Indoor unit

[0242] 3: Outdoor unit

[0243] 6: Hose

[0244] 43: Switch the damper

[0245] 101: Server

[0246] 110: Acquisition

[0247] 120: Reception Department

[0248] 130: Control Department

[0249] Prior art literature

[0250] Patent Literature

[0251] Patent Document 1: Japanese Patent Application Publication No. 2006-133121

Claims

1. An air conditioning system (1), comprising: an acquisition unit (110) for acquiring information related to the air quality of outdoor air; A receiving unit (120) that receives a request for ventilation operation; and a control unit (130) for performing an air supply operation for supplying outdoor air to the room and an exhaust operation for exhausting indoor air to the outside as the ventilation operation, When receiving the request for the ventilation operation, the control unit starts the air supply operation. When the information satisfies a first condition, the control unit switches from the air supply operation to the exhaust operation.

2. The air conditioning system according to claim 1, wherein: During the exhaust operation, when the information does not satisfy a second condition, the control unit restarts the air supply operation.

3. The air conditioning system according to claim 1 or 2, wherein: The control unit performs at least one of cooling operation and heating operation. The control unit has a third condition for switching from the air supply operation to the exhaust operation during at least one of the cooling operation and the heating operation, The third condition is a condition that makes it easier to switch to the exhaust operation than the first condition.

4. The air conditioning system according to claim 3, wherein: When the temperature of the outdoor air is above a specified temperature or the humidity of the outdoor air is above a specified humidity during the cooling operation, or when the temperature of the outdoor air is below a specified temperature or the humidity of the outdoor air is below a specified humidity during the heating operation, if the third condition is met, the control unit switches from the air supply operation to the exhaust operation.

5. The air conditioning system according to any one of claims 1 to 4, wherein: The acquisition unit acquires the information from a server (101).

6. The air conditioning system according to any one of claims 1 to 5, wherein: The information includes at least one of pollen, PM2.5, dust and yellow sand.

7. The air conditioning system according to any one of claims 1 to 6, wherein: The control unit continues the air supply operation for a predetermined time after starting the air supply operation regardless of the first condition.

8. The air conditioning system according to any one of claims 1 to 7, wherein: The control unit switches to the air supply operation regardless of the first condition when a predetermined time has elapsed after switching to the exhaust operation.

9. The air conditioning system according to any one of claims 1 to 8, wherein: The air supply path for sending outdoor air to the room during the air supply operation and the exhaust path for sending indoor air to the outside during the exhaust operation are shared.

10. The air conditioning system according to claim 9, wherein: The air conditioning system also has: A hose (6) which shares the air supply path and the air exhaust path; A ventilation device (1b) is arranged outdoors and performs the air supply operation and the air exhaust operation; as well as An indoor unit (2) is connected to the ventilation device via the hose.

11. The air conditioning system according to any one of claims 1 to 10, wherein: The air conditioning system further includes a switching damper (43) that performs a switching operation from one of the air supply operation and the exhaust operation to the other operation.

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