JP2024046341A - air conditioner - Google Patents

Abstract

[Problem] To provide an air conditioner that reduces abnormal noise. [Solution] An air conditioner with an indoor unit and an outdoor unit, comprising a hose that forms an air flow path for ventilating between the outdoors and the indoors, a fan disposed in the outdoor unit to generate an air flow, a damper disposed in the outdoor unit to change the direction of the air flow in the hose, and a control unit that controls the fan and the damper, the control unit executes an intake ventilation operation in which the damper is controlled to cause air to flow from the outdoors to the indoors within the hose and the fan is rotated to take in outdoor air into the indoors, and an exhaust ventilation operation in which the damper is controlled to cause air to flow from the indoors to the outdoors within the hose and the fan is rotated to exhaust indoor air to the outdoors, obtains indoor temperature and humidity information including at least one of the indoor temperature and humidity, and outdoor temperature and humidity information including at least one of the outdoor temperature and humidity, and executes either the intake ventilation operation or the exhaust ventilation operation based on the indoor temperature and humidity information and the outdoor temperature and humidity information. [Selected Figure] Figure 7

Description

This disclosure relates to an air conditioner.

In recent years, air conditioners have been developed that can perform ventilation between indoors and outdoors to be air-conditioned.

For example, Patent Document 1 discloses an air conditioner that can send outdoor air into a room and exhaust indoor air to the outside.

Japanese Patent Application Publication No. 2003-176944

The air conditioner described in Patent Document 1 has a problem in that dew condensation occurs in the air flow path for ventilation, resulting in abnormal noise.

This disclosure provides an air conditioner that reduces abnormal noise.

An air conditioner according to one aspect of the present disclosure includes:
An air conditioner comprising an indoor unit and an outdoor unit,
a hose that connects the indoor unit and the outdoor unit and forms an air flow path for ventilation between the outdoors and the indoors;
a fan disposed in the outdoor unit and generating air flow within the hose;
a damper arranged in the outdoor unit and changing the direction of air flow in the hose;
a control unit that controls the fan and the damper;
Equipped with
The control unit includes:
controlling the damper so that air flows from outside to outside in the hose and rotating the fan to draw outdoor air into the room;
an exhaust ventilation operation in which the damper is controlled so that air flows from the indoor to the outdoor within the hose, and the fan is rotated to exhaust indoor air to the outdoor;
Run
Obtain indoor temperature/humidity information including at least one of indoor temperature or humidity, and outdoor temperature/humidity information including at least one of outdoor temperature/humidity, based on the indoor temperature/humidity information and the outdoor temperature/humidity information. Then, either the supply air ventilation operation or the exhaust ventilation operation is executed.

According to the present disclosure, it is possible to provide an air conditioner with reduced noise.

Schematic diagram of an air conditioner according to Embodiment 1 of the present disclosure Schematic diagram of the ventilation system Schematic diagram of the ventilation system during supply ventilation operation Schematic diagram of the ventilation system during exhaust ventilation operation Schematic diagram of the ventilation system during humidification operation Schematic diagram of the ventilation system during dehumidification operation Block diagram showing the configuration for controlling an air conditioner Flowchart illustrating control of ventilation operation in an air conditioner according to Embodiment 1 of the present disclosure Flowchart explaining the process of acquiring indoor temperature/humidity information and outdoor temperature/humidity information Flowchart illustrating processing for determining whether to perform exhaust ventilation operation Block diagram showing the configuration of an air conditioner according to Embodiment 2 A flowchart for explaining control of ventilation operation in an air conditioner according to a second embodiment of the present disclosure. Flowchart illustrating processing for determining whether to perform exhaust ventilation operation

The following describes an embodiment of the present disclosure with reference to the drawings.

(Embodiment 1)
[overall structure]
FIG. 1 is a schematic diagram of an air conditioner according to a first embodiment of the present disclosure.

As shown in FIG. 1, the air conditioner 10 according to the present embodiment includes an indoor unit 20 placed in an indoor Rin to be air-conditioned, and an outdoor unit 30 placed in an outdoor Rout.

The indoor unit 20 is provided with an indoor heat exchanger 22 that exchanges heat with the indoor air A1, and an indoor fan 24 that draws the indoor air A1 into the indoor unit 20 and blows the indoor air A1 after heat exchange with the indoor heat exchanger 22 into the room Rin.

The outdoor unit 30 includes an outdoor heat exchanger 32 that exchanges heat with the outdoor air A2, and an outdoor heat exchanger 32 that draws the outdoor air A2 into the outdoor unit 30 and directs the outdoor air A2 after heat exchange with the outdoor heat exchanger 32 to the outside. A fan 34 that blows air is provided at Rout. The outdoor unit 30 is also provided with a compressor 36, an expansion valve 38, and a four-way valve 40 that execute a refrigeration cycle with the indoor heat exchanger 22 and the outdoor heat exchanger 32.

The indoor heat exchanger 22, the outdoor heat exchanger 32, the compressor 36, the expansion valve 38, and the four-way valve 40 are each connected by a refrigerant pipe through which the refrigerant flows. In cooling operation and dehumidification operation (weak cooling operation), the air conditioner 10 executes a refrigeration cycle in which the refrigerant flows from the compressor 36 through the four-way valve 40, the outdoor heat exchanger 32, the expansion valve 38, and the indoor heat exchanger 22 in that order, and then returns to the compressor 36. In heating operation, the air conditioner 10 executes a refrigeration cycle in which the refrigerant flows from the compressor 36 through the four-way valve 40, the indoor heat exchanger 22, the expansion valve 38, and the outdoor heat exchanger 32 in that order, and then returns to the compressor 36.

In addition to air conditioning operation using a refrigeration cycle, the air conditioner 10 also performs air conditioning operation to supply outdoor air A3 to the room Rin and exhaust indoor air A1 to the outdoor Rout. To achieve this, the air conditioner 10 has a ventilation device 50. The ventilation device 50 is provided in the outdoor unit 30.

FIG. 2 is a schematic diagram of the ventilation device.

As shown in FIG. 2, the ventilation device 50 has an absorbent material 52 inside through which the outdoor air A3 and A4 pass.

The absorbent material 52 is a member through which air can pass and which collects moisture from the air passing through it or which gives moisture to the air passing through it. In this embodiment, the absorbent material 52 is disk-shaped and rotates around a rotation center line C1 that passes through its center. The absorbent material 52 is rotationally driven by a motor 54.

The absorbent material 52 is preferably a polymer sorbent material that absorbs moisture in the air. The polymeric sorbent material is composed of, for example, a crosslinked sodium polyacrylate. Compared to adsorbents such as silica gel and zeolite, polymer sorbents absorb more water per volume, can desorb the supported water at low heating temperatures, and retain water for long periods of time. be able to.

Inside the ventilation device 50, a first flow path P1 and a second flow path P2 are provided, each passing through an absorbent material 52, and through which outdoor air A3 and A4 flow, respectively. The first flow path P1 and the second flow path P2 pass through the absorbent material 52 at different positions. Further, inside the ventilation device 50, a third flow path P3 is provided whose both ends are connected to different parts of the first flow path P1.

The first flow path P1 is a flow path through which outdoor air A3 flows toward the indoor unit 20. The outdoor air A3 flowing through the first flow path P1 is supplied to the indoor unit 20 via the ventilation duct 56.

In the case of this embodiment, the first flow path P1 includes a plurality of tributary flow paths P1a and P1b on the upstream side with respect to the absorbent material 52. Note that in this specification, "upstream" and "downstream" are used with respect to air flow.

The multiple tributary channels P1a, P2a join upstream of the absorbent material 52. The multiple tributary channels P1a, P1b are each provided with a first and second heater 58, 60 that heats the outdoor air A3.

The first and second heaters 58 and 60 may be heaters with the same heating capacity, or may be heaters with different heating capacities. In addition, the first and second heaters 58 and 60 are preferably PTC (Positive Temperature Coefficient) heaters that increase electrical resistance when the temperature rises due to current flow, that is, can suppress an excessive rise in heating temperature. . In the case of a PTC heater, the heating temperature does not need to be monitored because the heater itself adjusts the heating temperature within a certain temperature range. Alternatively, the first and second heaters 58 and 60 may be heaters using nichrome wire, carbon fiber, or the like.

A first fan 62 is provided in the first flow path P1 to generate a flow of outdoor air A3 toward the indoor unit 20. In this embodiment, the first fan 62 is disposed downstream of the absorbent material 52. When the first fan 62 is operated, the outdoor air A3 flows from the outdoor Rout into the first flow path P1 and passes through the absorbent material 52.

The first flow path P1 is provided with a first damper device 64 that distributes the outdoor air A3 flowing through the first flow path P1 to the room Rin (i.e., the indoor unit 20) or the outdoor Rout. In this embodiment, the first damper device 64 is disposed downstream of the first fan 62. The outdoor air A3 distributed to the indoor unit 20 by the first damper device 64 enters the indoor unit 20 via the ventilation duct 56 and is blown out to the room Rin by the indoor fan 24.

Furthermore, a second damper device 66 is provided in the first flow path P1. In the case of this embodiment, the second damper device 66 is arranged between the absorbent material 52 and the first fan 62. Although details will be described later, the second damper device 66 selectively closes the first flow path P1.

Furthermore, a third flow path P3 is connected to the first flow path P1. The third flow path P3 connects a portion of the first flow path P1 between the first fan 62 and the second damper device 66 and a portion downstream of the first damper device 64. A third damper device 68 is provided in the third flow path P3. The details will be described later, but the third damper device 68 selectively closes the third flow path P3.

The second flow path P2 is a flow path through which the outdoor air A4 flows. Unlike the outdoor air A3 flowing through the first flow path P1, the outdoor air A4 flowing through the second flow path P2 does not flow toward the indoor unit 20. The outdoor air A4 flowing through the second flow path P2 passes through the absorbent material 52 and then flows out to the outdoor Rout.

A second fan 70 that generates a flow of outdoor air A4 is provided in the second flow path P2. In the case of this embodiment, the second fan 70 is arranged downstream with respect to the absorbent material 52. When the second fan 70 operates, outdoor air A4 flows from the outdoor Rout into the second flow path P2, passes through the absorbent material 52, and then flows out to the outdoor Rout.

The ventilation device 50 selectively performs ventilation operation, humidification operation, and dehumidification operation by selectively using the absorbent material 52 (motor 54), the first heater 58, the second heater 60, the first fan 62, the first damper device 64, the second damper device 66, the third damper device 68, and the second fan 70. Note that the ventilation operation includes the supply ventilation operation and the exhaust ventilation operation.

Figure 3 is a schematic diagram of the ventilation system during supply ventilation operation.

The supply ventilation operation is an air conditioning operation that supplies the outdoor air A3 to the room Rin (i.e., the indoor unit 20). As shown in FIG. 3, during the supply ventilation operation, the motor 54 continues to rotate the absorbent 52. The first heater 58 and the second heater 60 are in the OFF state and do not heat the outdoor air A3. The first fan 62 is in the ON state, whereby the outdoor air A3 flows through the first flow path P1. The first damper device 64 is in the closed state, whereby the outdoor air A3 in the first flow path P1 is distributed to the indoor unit 20. The second damper device 66 is in the open state, whereby the outdoor air A3 flows from the absorbent 52 toward the first fan 62. The third damper device 68 is in the closed state, whereby the outdoor air A3 does not flow through the third flow path P3. The second fan 70 is in the OFF state, so that no flow of outdoor air A4 is generated in the second flow path P2.

According to such air supply ventilation operation, outdoor air A3 flows into the first flow path P1 and passes through the absorbent material 52 without being heated by the first and second heaters 58 and 60. The outdoor air A3 that has passed through the absorbent material 52 is distributed to the indoor unit 20 by the first damper device 64. Outdoor air A3 that has passed through the first damper device 64 and reached the indoor unit 20 via the ventilation conduit 56 is blown out to the indoor Rin by the indoor fan 24. Through such air supply ventilation operation, the outdoor air A3 is directly supplied to the indoor Rin, and the indoor Rin is ventilated.

FIG. 4 is a schematic diagram of the ventilator during exhaust ventilation operation.

The exhaust ventilation operation is an air conditioning operation that exhausts indoor air A1 to the outdoor Rout. As shown in FIG. 4, during the exhaust ventilation operation, the motor 54 is in an OFF state and the absorbent material 52 is not rotating. The first heater 58 and the second heater 60 are in an OFF state. The first fan 62 is ON so that room air A1 flows through the ventilation conduit 56 and the third flow path P3 towards the first fan 62. The first damper device 64 is in an open state, thereby distributing the indoor air A1 in the first flow path P1 to the outdoor Rout. The second damper device 66 is in a closed state, so that room air A1 does not flow towards the absorbent material 52. The third damper device 68 is in an open state, whereby room air A1 flows towards the first fan 62 via the third flow path P3. The second fan 70 is in an OFF state, so that no flow of outdoor air A4 occurs in the second flow path P2.

According to such exhaust ventilation operation, when the first fan 62 is in the ON state, the indoor air A1 flows between the absorbent material 52 and the first fan 62 via the ventilation conduit 56 and the third flow path P3. It flows into the first flow path P1 between the two. At this time, since the second damper device 66 is in a closed state, the indoor air A1 does not flow toward the absorbent material 52. Indoor air A1 that has passed through the first fan 62 is distributed to the outdoor Rout by the first damper device 64 and is discharged to the outdoor Rout. As a result, the room Rin is ventilated.

Note that the third flow path P3 allows the first fan 62 to rotate in the same rotation direction as during the air supply ventilation operation during the exhaust ventilation operation. As a result, a sirocco fan can be used as the first fan 62.

Figure 5 is a schematic diagram of the ventilation device during humidification operation.

The humidification operation is an air conditioning operation that humidifies the outdoor air A3 and supplies the humidified outdoor air A3 to the indoor Rin (that is, the indoor unit 20). As shown in FIG. 5, the motor 54 continues to rotate the absorbent material 52 during humidification operation. The first heater 58 and the second heater 60 are in the ON state and heat the outdoor air A3. The first fan 62 is in the ON state, so that the outdoor air A3 is flowing through the first flow path P1. The first damper device 64 distributes the outdoor air A3 in the first flow path P1 to the indoor unit 20. The second damper device 66 is in an open state so that outdoor air A3 flows from the absorbent material 52 towards the first fan 62. The second damper device 66 is in a closed state, so that the outdoor air A3 does not flow through the third flow path P3. The second fan 70 is in the ON state, so that the outdoor air A4 is flowing through the second flow path P2.

According to this humidification operation, the outdoor air A3 flows into the first flow path P1, is heated by the first and second heaters 58, 60, and passes through the absorbent 52. At this time, the heated outdoor air A3 can remove a larger amount of moisture from the absorbent 52 than when it is not heated. As a result, the outdoor air A3 carries a large amount of moisture. The outdoor air A3 that passes through the absorbent 52 and carries a large amount of moisture is distributed to the indoor unit 20 by the first damper device 64. The outdoor air A3 that passes through the first damper device 64 and reaches the indoor unit 20 via the ventilation duct 56 is blown out into the room Rin by the indoor fan 24. According to this humidification operation, the outdoor air A3 that carries a large amount of moisture is supplied to the room Rin, and the room Rin is humidified.

In addition, by turning off either the first heater 58 or the second heater 60, the amount of moisture that the outdoor air A3 removes from the absorbent material 52 may be reduced, i.e., a weak humidification operation in which the amount of humidification of the indoor air Rin is reduced may be performed.

The moisture capacity of the absorbent 52 decreases as the heated outdoor air A3 removes moisture, i.e., the absorbent 52 dries out. When the absorbent 52 dries out, the outdoor air A3 flowing through the first flow path P1 cannot remove moisture from the absorbent 52. To deal with this, the absorbent 52 removes moisture from the outdoor air A4 flowing through the second flow path P2. This keeps the moisture capacity of the absorbent 52 almost constant, allowing the humidification operation to continue.

Figure 6 is a schematic diagram of the ventilation system during dehumidification operation.

The dehumidification operation is an air conditioning operation that dehumidifies the outdoor air A3 and supplies the dehumidified outdoor air A3 to the indoor Rin (ie, the indoor unit 20). As shown in FIG. 6, in the dehumidification operation, adsorption operation and regeneration operation are performed alternately.

The adsorption operation is an operation in which moisture carried in the outdoor air A3 is adsorbed onto the absorbent material 52, thereby dehumidifying the outdoor air A3. As shown in FIG. 6, the motor 54 continues to rotate the absorbent material 52 during the suction operation. The first heater 58 and the second heater 60 are in an OFF state and are not heating the outdoor air A3. The first fan 62 is in the ON state, so that the outdoor air A3 is flowing through the first flow path P1. The first damper device 64 distributes the outdoor air A3 in the first flow path P1 to the indoor unit 20. The second damper device 66 is in an open state so that outdoor air A3 flows from the absorbent material 52 towards the first fan 62. The third damper device 68 is in a closed state, so that the outdoor air A3 does not flow through the third flow path P3. The second fan 70 is in an OFF state, so that no flow of outdoor air A4 occurs in the second flow path P2.

According to this adsorption operation, the outdoor air A3 flows into the first flow path P1 and passes through the absorbent 52 without being heated by the first and second heaters 58, 60. At this time, the moisture carried by the outdoor air A3 is adsorbed by the absorbent 52. As a result, the amount of moisture carried by the outdoor air A3 decreases, that is, the outdoor air A3 is dried. The outdoor air A3 that has passed through the absorbent 52 and is dried is distributed to the indoor unit 20 by the first damper device 64. The outdoor air A3 that has passed through the first damper device 64 and reached the indoor unit 20 via the ventilation duct 56 is blown out into the room Rin by the indoor fan 24. By this adsorption operation, the dried outdoor air A3 is supplied to the room Rin, and the room Rin is dehumidified.

As the adsorption operation continues, the amount of water retained in the absorbent material 52 continues to increase, and as a result, the ability of the absorbent material 52 to adsorb moisture carried by the outdoor air A3 decreases. A regeneration operation is performed to regenerate the absorbent material 52 in order to restore its adsorption capacity.

During the regeneration operation, the motor 54 continues to rotate the absorbent 52. The first heater 58 and the second heater 60 are ON and heat the outdoor air A3. The first fan 62 is ON and causes the outdoor air A3 to flow through the first flow path P1. The first damper device 64 distributes the outdoor air A3 in the first flow path P1 to the outdoor Rout instead of the indoor unit 20. The second damper device 66 is open and causes the outdoor air A3 to flow from the absorbent 52 toward the first fan 62. The third damper device 68 is closed and causes the outdoor air A3 not to flow through the third flow path P3. The second fan 70 is OFF and causes no flow of the outdoor air A4 to occur in the second flow path P2.

According to such a regeneration operation, the outdoor air A3 flows into the first flow path P1, is heated by the first and second heaters 58, 60, and passes through the absorbent 52. At this time, the heated outdoor air A3 removes a large amount of moisture from the absorbent 52. As a result, a large amount of moisture is carried by the outdoor air A3. At the same time, the water retention capacity of the absorbent 52 decreases, that is, the absorbent 52 dries and its adsorption capacity is regenerated. The outdoor air A3 that passes through the absorbent 52 and carries a large amount of moisture is distributed to the outdoor Rout by the first damper device 64 and discharged to the outdoor Rout. As a result, during the regeneration operation in the dehumidification operation, the outdoor air A3 carrying a large amount of moisture due to the regeneration of the absorbent 52 is not supplied to the room Rin.

By performing such adsorption operation and regeneration operation alternately, the adsorption capacity of the absorbent material 52 is maintained, and the dehumidification operation can be continuously performed.

The above-mentioned air conditioning operation using the refrigeration cycle (cooling operation, dehumidification operation (weak cooling operation), heating operation) and the air conditioning operation using the ventilation device 50 (ventilation operation (supply ventilation operation, exhaust ventilation operation), humidification operation, dehumidification operation) can be performed separately or simultaneously. For example, by performing the dehumidification operation using the refrigeration cycle and the dehumidification operation using the ventilation device 50 simultaneously, it is possible to dehumidify the room Rin while maintaining the room temperature constant.

The air conditioning operation performed by the air conditioner 10 is selected by the user. For example, when the user performs a selection operation on the remote controller 72 shown in FIG. 1, the air conditioner 10 performs the air conditioning operation corresponding to that operation.

[Ventilation operation control]
Up to this point, the configuration and operation of the air conditioner 10 according to the present embodiment have been schematically described. From here on, further features of the air conditioner 10 according to this embodiment will be explained.

Conventionally, when performing ventilation operation with an air conditioner, condensation may occur in a hose connecting an indoor unit and an outdoor unit due to a difference in temperature or humidity between indoors and outdoors. If condensation occurs inside the hose, when air flows through the hose, the air may collide with the condensed water, causing a noise. The noise generated inside the hose may resonate and cause abnormal noise inside the room.

For this reason, it is preferable to prevent dew condensation from occurring within the hose as much as possible. For example, when the air in the indoor Rin is hotter and more humid than the air in the outdoor Rout, when the exhaust ventilation operation is executed, the hot and humid indoor Rin air is cooled in the hose 56, and dew condensation occurs in the hose 56. Sometimes I put it away. Conversely, when the air in the outdoor Rout is hotter and more humid than the air in the indoor Rin, when the air supply ventilation operation is executed, the hot and humid air in the outdoor Rout is cooled in the hose 56, and dew condensation occurs in the hose 56. Sometimes I end up doing it. In this embodiment, depending on the temperature and humidity conditions of the indoor Rin and the outdoor Rout, it is selected whether to perform an exhaust ventilation operation or a supply air ventilation operation.

Figure 7 is a block diagram showing the configuration for controlling the air conditioner 10.

As shown in FIG. 7, the air conditioner 10 includes an indoor unit 20 and an outdoor unit 30. The air conditioner 10 also includes a hose 56, a fan 62, dampers 64, 66, and 68, and a control section 80. Note that the hose 56 corresponds to the above-mentioned ventilation conduit 56, the fan 62 corresponds to the above-mentioned first fan 62, and the dampers 64, 66, and 68 correspond to the above-mentioned first damper device 64 and second damper device, respectively. This corresponds to the damper device 66 and the third damper device 68. Further, the fan 62 and dampers 64, 66, and 68 are arranged in a ventilation device 50 provided in the outdoor unit 30.

The hose 56 connects the indoor unit 20 and the outdoor unit 30, and forms an air flow path for ventilation between the indoor Rin and the outdoor Rout. The fan 62 generates an air flow in the hose 56. The dampers 64, 66, and 68 change the direction of the air flow in the hose 56.

The control unit 80 includes, for example, a memory that stores a program and a processing circuit that corresponds to a processor such as a CPU (Central Processing Unit). The functions of the control unit 80 may be realized by hardware alone, or by a combination of hardware and software. The control unit 80 realizes a predetermined function by reading data and programs stored in the memory and performing various arithmetic processing.

The control unit 80 controls the fan 62 and dampers 64, 66, and 68. The control unit 80 also controls the dampers 64, 66, and 68 so that air flows from the outdoor Rout to the indoor Rin in the hose 56, and rotates the fan 62 for air supply ventilation to take the air from the outdoor Rout into the indoor Rin. Execute driving. The control unit 80 also controls the dampers 64, 66, and 68 so that air flows from the indoor Rin to the outdoor Rout within the hose 56, and rotates the fan 62 for exhaust ventilation to discharge the air from the indoor Rin to the outdoor Rout. Execute driving.

In this embodiment, the control unit 80 performs either the supply ventilation operation or the exhaust ventilation operation based on the indoor temperature and humidity information and the outdoor temperature and humidity information. The indoor temperature and humidity information is information including at least one of the indoor temperature or indoor humidity of the indoor area Rin, and the outdoor temperature and humidity information is information including at least one of the outdoor humidity or outdoor temperature of the outdoor area Rout. In this embodiment, the indoor temperature and humidity information includes the indoor temperature and indoor humidity, and the outdoor temperature and humidity information includes the outdoor temperature.

Furthermore, in this embodiment, the air conditioner 10 includes a first sensor 26 that is disposed in the indoor unit 20 and can detect the indoor temperature and indoor humidity of the room Rin. The control unit 80 acquires indoor temperature and humidity information from the first sensor 26 . The first sensor 26 can be arranged, for example, inside the indoor unit 20 near a nozzle outlet from which air is ejected to the indoor heat exchanger 22. Alternatively, first sensor 26 may be placed near upstream in the flow of air to indoor exchange 22 to measure air drawn into indoor exchange 22 . Furthermore, in this embodiment, the air conditioner 10 includes a second sensor 42 that is disposed in the outdoor unit 30 and can detect the outdoor temperature of the outdoor Rout. Further, the third sensor 44 may be arranged near the outlet of the hose 56 on the outdoor unit 30 side. The third sensor 44 can detect the temperature of the air flowing through the hose 56. The control unit 80 acquires the outdoor temperature from the second sensor 42 and the temperature of the air flowing through the hose 56 from the third sensor 44 as outdoor temperature and humidity information. Note that the outdoor temperature in this embodiment can include the temperature of the outdoor Rout and the temperature of the air discharged from the hose 56.

Figure 8 is a flowchart explaining the control of ventilation operation in the air conditioner 10 according to the first embodiment of the present disclosure. The control of the supply ventilation operation and the exhaust ventilation operation in the air conditioner 10 will be explained with reference to Figure 8.

For example, when a signal to start ventilation operation is transmitted by the user operating the remote controller 72, the control unit 80 receives the signal to start ventilation operation and executes either the supply air ventilation operation or the exhaust ventilation operation. Decide what to do.

Upon receiving the signal to start ventilation operation, the control unit 80 acquires indoor temperature/humidity information and outdoor temperature/humidity information in step S11.

The step of acquiring indoor temperature/humidity information and outdoor temperature/humidity information in step S11 will be described in detail with reference to FIG. 9. FIG. 9 is a flowchart illustrating the process of acquiring indoor temperature/humidity information and outdoor temperature/humidity information.

First, in step S111, the control unit 80 acquires indoor temperature and humidity information from the first sensor 26. As described above, in this embodiment, the control unit 80 acquires the indoor temperature and indoor humidity from the first sensor 26 as indoor temperature and humidity information. Note that in this embodiment, the control unit 80 acquires information on indoor relative humidity.

Next, in step S112, the control unit 80 acquires outdoor temperature and humidity information from the second sensor 42. In step S112, the control unit 80 acquires the outdoor temperature from the second sensor 42 as the outdoor temperature and humidity information.

Next, in step S113, the control unit 80 acquires outdoor temperature and humidity information from the third sensor 44. In step S113, the control unit 80 acquires the temperature of the air flowing through the hose 56 from the third sensor 44 as outdoor temperature and humidity information.

Furthermore, in step S114, the control unit 80 calculates the indoor dew point temperature. The indoor dew point temperature is calculated based on the indoor temperature and indoor humidity. The control unit 80 can calculate the dew point temperature, for example, by calculating the water vapor pressure from the temperature and humidity, and determining the temperature at which the water vapor pressure becomes the saturated water vapor pressure. Alternatively, the control unit 80 may obtain the dew point temperature using a dew point thermometer.

The control unit 80 may acquire indoor temperature and humidity information, outdoor temperature and humidity information, and indoor dew point temperature continuously or at predetermined time intervals while ventilation operation is being performed.

Next, in step S12, the control unit 80 determines whether to perform supply ventilation operation or exhaust ventilation operation, i.e., whether to perform exhaust ventilation operation, based on the acquired indoor temperature and humidity information and outdoor temperature and humidity information.

For example, if the indoor Rin is in a hotter and more humid state than the outdoor Rout, when exhaust ventilation operation is performed, the hot and humid air from the indoor Rin is cooled and condenses in the hose 56, which may cause condensation water to accumulate in the hose 56. Conversely, if the outdoor Rout is in a hotter and more humid state than the indoor Rin, when supply ventilation operation is performed, the hot and humid air from the outdoor Rout is cooled and condenses in the hose 56, which may cause condensation water to accumulate in the hose 56. For this reason, by performing either the supply ventilation operation or the exhaust ventilation operation depending on the temperature and humidity conditions of the indoor Rin and the indoor Rout, it is possible to suppress the occurrence of condensation in the hose 56 and reduce abnormal noise.

In step S12, if the control unit 80 determines to perform the exhaust ventilation operation, the process proceeds to step S13, and if the control unit 80 determines not to perform the exhaust ventilation operation, the process proceeds to step S14. Whether or not to perform the exhaust ventilation operation is determined depending on whether the exhaust stop flag is ON or OFF, as will be described later with reference to FIG. The control unit 80 determines to perform the exhaust ventilation operation when the exhaust stop flag is OFF, and determines to perform the air supply ventilation operation when the exhaust stop flag is ON.

The step of determining whether to perform the exhaust ventilation operation in step S12 will be described in detail with reference to FIG. 10. FIG. 10 is a flowchart illustrating a process for determining whether to perform exhaust ventilation operation.

In this embodiment, when the control unit 80 determines not to perform the exhaust ventilation operation, the exhaust stop flag is set to ON. When the exhaust stop flag is set to ON, the air supply ventilation operation is performed without performing the exhaust ventilation operation.

In step S121, the control unit 80 determines whether the exhaust stop flag is OFF. The exhaust stop flag is stored, for example, in a memory, and the control unit 80 can determine whether the exhaust stop flag is OFF by reading whether the exhaust stop flag stored in the memory is ON or OFF. If the exhaust stop flag is OFF, the process proceeds to step S122, and if the exhaust stop flag is ON, the process proceeds to step S124.

In step S122, the control unit 80 determines whether the difference between the temperature of the air flowing through the hose (hose temperature) obtained from the third sensor 44 and the indoor dew point temperature is less than the first threshold value. If the difference between the hose temperature and the indoor dew point temperature is continuously below the first threshold value for a predetermined period of time, the control unit 80 determines that the difference between the hose temperature and the indoor dew point temperature is below the first threshold value. good. For example, if the difference between the hose temperature and the indoor dew point temperature is below 4°C for 6 minutes or more, or below 1°C for 3 minutes or more, the control unit 80 controls the hose temperature and the indoor dew point It may be determined that the difference from the temperature is less than a first threshold value.

If the control unit 80 determines in step S122 that the difference between the outdoor temperature and the indoor dew point temperature is below the first threshold, the process proceeds to step S123. If the control unit 80 determines in step S122 that the difference between the outdoor temperature and the indoor dew point temperature is not below the first threshold, the process of determining whether or not to perform exhaust ventilation operation is terminated.

In step S123, the control unit 80 sets the exhaust stop flag to ON. When the difference between the outdoor temperature and the indoor dew point temperature falls below the first threshold, the air from the room Rin is likely to condense in the hose 56 when the exhaust ventilation operation is performed. Therefore, the control unit 80 sets the exhaust stop flag to ON and controls so that the exhaust ventilation operation is not performed. When the exhaust stop flag is set to ON, the control unit 80 performs the supply ventilation operation.

If the control unit 80 determines in step S121 that the exhaust stop flag is not OFF, in step S124 the control unit 80 determines whether the difference between the outdoor temperature and the indoor dew point temperature exceeds a second threshold value. . For example, when the difference between the outdoor temperature and the indoor dew point temperature exceeds 5° C., the control unit 80 can determine that the difference between the outdoor temperature and the indoor dew point temperature exceeds the second threshold value.

In step S124, if the control unit 80 determines that the difference between the outdoor temperature and the indoor dew point temperature exceeds the second threshold, the process proceeds to step S125. If the control unit 80 determines in step S124 that the difference between the outdoor temperature and the indoor dew point temperature does not exceed the second threshold value, it ends the process of determining whether to perform the exhaust ventilation operation.

In step S125, the control unit 80 sets the exhaust stop flag to OFF. When the difference between the outdoor temperature and the indoor dew point temperature exceeds the second threshold, dew condensation is unlikely to occur within the hose 56 even if the exhaust ventilation operation is performed. Therefore, the control unit 80 sets the exhaust stop flag to OFF and performs control so that the exhaust ventilation operation can be performed. When the exhaust stop flag is set to OFF, the control unit 80 executes the exhaust ventilation operation.

Returning to FIG. 8, when it is determined in step S12 that the exhaust ventilation operation is to be performed, the control unit 80 executes the exhaust ventilation operation in step S13.

When performing the exhaust ventilation operation, the control unit 80 opens the damper 64, closes the damper 66, and opens the damper 68, as shown in FIG. Further, the control unit 80 rotates the fan 62 to draw the indoor air A1 of the indoor Rin into the hose 56. As the fan 62 rotates, indoor air A1 flows from the hose 56 into the third flow path P3. Due to the rotation of the fan 62, the indoor air A1 that has passed through the third flow path P3 is directed to the outdoor Rout by the damper 64 and is discharged.

Returning to FIG. 8, if the control unit 80 determines in step S12 that exhaust ventilation operation is not to be performed, it performs supply ventilation operation in step S14.

When performing the air supply ventilation operation, as shown in FIG. 3, the control unit 80 closes the damper 64, opens the damper 66, and closes the damper 68. Further, the control unit 80 rotates the fan 62 to draw the outdoor air A3 from the outdoor Rout into the first flow path P1. Due to the rotation of the fan 62, the outdoor air A3 that has passed through the first flow path P1 is directed toward the indoor Rin by the damper 64 and introduced into the indoor Rin.

[effect]
According to the embodiment described above, the following effects can be achieved.

The air conditioner 10 is an air conditioner equipped with an indoor unit 20 and an outdoor unit 30, and is equipped with a hose 56, a fan 62, dampers 64, 66, 68, and a control unit 80. The hose 56 connects the indoor unit 20 and the outdoor unit 30, and performs ventilation between the outdoor Rout and the indoor Rin. The fan 62 is disposed in the outdoor unit 30 and generates an air flow in the hose 56. The dampers 64, 66, 68 are disposed in the outdoor unit 30 and change the direction of the air flow in the hose 56. The control unit 80 controls the fan 62 and the dampers 64, 66, 68. The control unit 80 executes an intake ventilation operation and an exhaust ventilation operation. In the intake ventilation operation, the dampers 64, 66, 68 are controlled so that air flows from the outdoor Rout to the indoor Rin in the hose 56, and the fan 62 is rotated to take in the air from the outdoor Rout into the indoor Rin. In the exhaust ventilation operation, dampers 64, 66, and 68 are controlled so that air flows from the room Rin to the outside Rout in the hose 56, and the fan 62 is rotated to exhaust the air in the room Rin to the outside Rout. The control unit 80 acquires the indoor temperature and humidity information and the outdoor temperature and humidity information, and performs either the supply ventilation operation or the exhaust ventilation operation based on the indoor temperature and humidity information and the outdoor temperature and humidity information. The indoor temperature and humidity information includes at least one of the temperature or humidity of the room Rin. The outdoor temperature and humidity information includes at least one of the temperature or humidity of the outside Rout.

With such a configuration, it is possible to provide an air conditioner that suppresses the occurrence of dew condensation within the hose 56 and reduces abnormal noise. By selecting the supply air ventilation operation or the exhaust ventilation operation based on the indoor temperature/humidity information and the outdoor temperature/humidity information and whether the situation is such that condensation is likely to occur inside the hose 56, the inside of the hose 56 due to the ventilation operation can be It is possible to suppress the occurrence of dew condensation. Since condensed water within the hose 56 causes abnormal noise, the abnormal noise can be reduced by suppressing the occurrence of dew condensation within the hose 56.

The indoor temperature and humidity information includes the indoor temperature and humidity, and the outdoor temperature and humidity information includes the outdoor temperature. The control unit 80 may calculate the indoor dew point temperature based on the indoor temperature and humidity, and perform either exhaust ventilation operation or supply ventilation operation based on the difference between the outdoor temperature and the indoor dew point temperature.

With this configuration, it is possible to more accurately determine whether or not there is a situation where dew condensation is likely to occur within the hose 56.

The control unit 80 may perform supply ventilation operation when the difference between the hose temperature and the indoor dew point temperature falls below a first threshold value.

With this configuration, the air taken into the hose 56 from inside the room Rin is cooled and prone to condensation, so by running the supply ventilation operation, it is possible to suppress the occurrence of condensation and reduce abnormal noise.

The control unit 80 may perform the exhaust ventilation operation when the difference between the outdoor temperature and the indoor dew point temperature exceeds the second threshold.

This configuration makes it possible to prevent condensation from forming inside the hose 56 even when exhaust ventilation operation is performed.

The air conditioner 10 may further include a first sensor 26 arranged in the indoor unit 20 to detect at least one of the temperature or humidity of the room Rin, and the control unit 80 may acquire indoor temperature and humidity information from the first sensor 26.

This configuration allows the temperature or humidity of the room Rin to be continuously acquired.

The air conditioner 10 is provided with a second sensor 42 arranged in the outdoor unit 30 to detect at least one of the outdoor temperature or humidity, and the control unit 80 may acquire outdoor temperature and humidity information from the second sensor 42.

With such a configuration, the temperature or humidity of the outdoor Rout can be continuously acquired.

In the above-described embodiment, an example has been described in which the control unit 80 acquires outdoor temperature and humidity information from the second sensor 42, but this is not limiting. For example, the air conditioner 10 may further include a communication interface for communicating with an external device, and the control unit 80 may acquire outdoor temperature and humidity information from the external device via the communication interface.

This configuration makes it possible to obtain information on outdoor temperature or humidity without placing a sensor in the outdoor unit 30.

Further, in the embodiment described above, an example has been described in which the third sensor 44 is arranged near the outlet of the hose 56 on the outdoor unit 30 side, but the present invention is not limited thereto. The third sensor 44 is not an essential component and may not be provided.

(Embodiment 2)
An air conditioner according to a second embodiment of the present invention will be described. Note that in the second embodiment, differences from the first embodiment will be mainly described. In the second embodiment, configurations that are the same as or equivalent to those in the first embodiment will be described with the same reference numerals. Also, in the second embodiment, descriptions that overlap with the first embodiment will be omitted.

FIG. 11 is a block diagram showing the configuration of an air conditioner according to the second embodiment. As shown in FIG. 11, the second embodiment differs from the first embodiment in that an air conditioner 10A includes an indoor air quality sensor 28 disposed in the indoor unit 20.

The indoor air quality sensor 28 detects information related to the air quality of the room Rin. The information related to the air quality of the room Rin includes, for example, the concentration of volatile organic compounds (VOCs), the concentration of formaldehyde, or the concentration of carbon dioxide (CO ₂ ) in the air of the room Rin.

The control unit 80 acquires information about the air quality of the room Rin, and performs either exhaust ventilation operation or supply ventilation operation based on the air quality in the room. In this embodiment, the control unit 80 acquires information about the air quality of the room Rin from the indoor air quality sensor 28.

Figure 12 is a flowchart explaining the control of ventilation operation in air conditioner 10A according to embodiment 2 of the present disclosure. The control of supply ventilation operation and exhaust ventilation operation in air conditioner 10A will be explained with reference to Figure 12. Note that step S21 and steps S24 to S25 are the same as step S11 and steps S13 to S14 in Figure 8, and therefore the explanation will be omitted.

In this embodiment, in step S22, the control unit 80 acquires information regarding the air quality of the room Rin. The control unit 80 acquires, for example, the carbon dioxide concentration in the air of the room Rin from the indoor air quality sensor 28 .

In step S23, the control unit 80 determines whether to perform supply ventilation operation or exhaust ventilation operation, i.e., whether to perform exhaust ventilation operation, based on the acquired indoor temperature and humidity information and outdoor temperature and humidity information and information regarding the air quality of the room Rin.

In this embodiment, the control unit 80 determines whether to perform exhaust ventilation operation based on information on the air quality of the room Rin in addition to the indoor temperature and humidity information and the outdoor temperature and humidity information. For example, by performing exhaust ventilation operation when the carbon dioxide concentration in the air of the room Rin is equal to or higher than a predetermined threshold, for example 1000 ppm, the air of the room Rin with a high carbon dioxide concentration can be exhausted to the outside Rout, thereby lowering the carbon dioxide concentration of the room Rin.

The step of determining whether to perform the exhaust ventilation operation in step S23 will be described in detail with reference to FIG. 13. FIG. 13 is a flowchart illustrating a process for determining whether to perform exhaust ventilation operation.

In step S231, the control unit 80 determines whether the carbon dioxide concentration in the indoor Rin is less than 1000 ppm. If the carbon dioxide concentration in the indoor Rin is less than 1000 ppm, the process proceeds to step S233. If the carbon dioxide concentration in the indoor Rin is 1000 ppm or more, the process proceeds to step S232.

In step S232, the control unit 80 turns the exhaust stop flag OFF. When the carbon dioxide concentration in the room Rin is 1000 ppm or higher, the exhaust ventilation operation is performed by turning the exhaust stop flag OFF, and the air in the room Rin can be exhausted to the outside Rout. When the control unit 80 turns the exhaust stop flag OFF in step S232, the process of determining whether or not to perform the exhaust ventilation operation is completed.

Steps S233 to S237 are the same as steps S121 to S125 in Figure 10, so their explanation is omitted.

When the control unit 80 turns the exhaust stop flag ON in step S235, or when the control unit 80 turns the exhaust stop flag ON in step S237, the process of determining whether or not to perform exhaust ventilation operation is terminated.

Returning to FIG. 12, if the exhaust stop flag is OFF, the control unit 80 decides to perform exhaust ventilation operation in step S23, and performs exhaust ventilation operation in step S24. On the other hand, if the exhaust stop flag is ON, the control unit 80 decides not to perform exhaust ventilation operation in step S23, and performs supply ventilation operation in step S25.

[effect]
According to the above-described embodiment, the following effects can be obtained.

The control unit 80 may acquire information regarding the air quality of the indoor Rin, and may perform either the exhaust ventilation operation or the air supply ventilation operation based on the information regarding the air quality of the indoor Rin.

With this configuration, for example, if the air quality in the room Rin deteriorates, the air in the room Rin can be discharged to the outside Rout.

The air conditioner 10A further includes an indoor air quality sensor 28 that is disposed in the indoor unit 20 and detects information regarding the air quality of the indoor Rin, and the control unit 80 receives information regarding the air quality of the indoor Rin from the indoor air quality sensor 28. may be obtained.

This configuration allows information about the air quality in the room Rin to be obtained continuously.

In the above-described embodiment, an example has been described in which the indoor air quality sensor 28 is disposed in the indoor unit 20, and the control unit 80 executes either the exhaust ventilation operation or the supply ventilation operation based on information regarding the air quality of the room Rin, but this is not limiting. For example, the control unit 80 may obtain information regarding the outdoor air quality, and execute either the exhaust ventilation operation or the supply ventilation operation based on information regarding the air quality of the outdoor Rout. In this case, the control unit 80 may obtain information regarding the outdoor air quality from an outdoor air quality sensor disposed in the outdoor unit 30 that detects information regarding the air quality of the outdoor Rout.

The information regarding the air quality of the outdoor route includes, for example, the concentration of nitrogen oxides (NOx), sulfur oxides (SOx), or fine particulate matter (PM2.5) in the air of the outdoor route. For example, when the concentration of these substances in the air of the outdoor Rout exceeds a predetermined value, the control unit 80 may perform control to perform an exhaust ventilation operation instead of an air supply exhaust operation. Alternatively, the control unit 80 may perform control to perform either the exhaust ventilation operation or the supply air ventilation operation based on the air quality of both the indoor Rin and the outdoor Rout.

In the above embodiment, the control unit 80 selects the exhaust ventilation operation or the supply ventilation operation based on the air quality, and further selects the exhaust ventilation operation or the supply ventilation operation based on the indoor and outdoor temperature and humidity information, but the present invention is not limited to this. The control unit 80 may select the exhaust ventilation operation or the supply ventilation operation based on the air quality. That is, the control unit 80 may select the exhaust ventilation operation or the supply ventilation operation based on the information on the indoor and outdoor air quality without acquiring the indoor and outdoor temperature and humidity information. For example, when the air quality of the room Rin is poor, the air quality of the room Rin can be improved by performing the exhaust ventilation operation to exhaust the air of the room Rin to the outdoor Rout. In the conventional air conditioner, there is room for improvement in terms of improving the air quality of the room Rin, but the air quality of the room Rin can be improved by performing the exhaust ventilation operation or the supply ventilation operation based on the indoor and outdoor air quality.

As mentioned above, the above embodiment has been described as an example of the technology disclosed in this application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments in which changes, replacements, additions, omissions, etc. are made as appropriate. Further, the processing steps described in the above embodiments may be divided or integrated, and the order of the steps may be changed as appropriate, as long as it does not interfere with the spirit of the present disclosure.

(Summary of embodiment)
(1) The air conditioner of the present disclosure is an air conditioner that includes an indoor unit and an outdoor unit, and has an air flow path that connects the indoor unit and the outdoor unit and performs ventilation between the outdoors and the indoors. Controls the constituent hoses, a fan placed in the outdoor unit to generate air flow in the hose, a damper placed in the outdoor unit to change the direction of air flow in the hose, the fan, and the damper. and a control unit that controls the damper and rotates the fan to draw outdoor air into the room so that air flows from the outdoors to the room inside the hose, and the control unit that controls the damper and rotates the fan to bring in outdoor air into the room, and the Exhaust ventilation operation that controls the damper and rotates the fan to exhaust indoor air to the outdoors so that air flows outdoors, and provides indoor temperature and humidity information including at least one of the indoor temperature and humidity, and the outdoor air. and outdoor temperature/humidity information including at least one of temperature and humidity, and execute either a supply air ventilation operation or an exhaust ventilation operation based on the indoor temperature/humidity information and the outdoor temperature/humidity information.

(2) In the air conditioner of (1), the indoor temperature and humidity information includes the indoor temperature and humidity, and the outdoor temperature and humidity information includes the outdoor temperature, and the control unit may calculate the indoor dew point temperature based on the indoor temperature and humidity, and perform either exhaust ventilation operation or supply ventilation operation based on the difference between the outdoor temperature and the indoor dew point temperature.

(3) In the air conditioner of (2), the control unit may perform the supply air ventilation operation when the difference between the outdoor temperature and the indoor dew point temperature is less than the first threshold value.

(4) In the air conditioner of (2) or (3), the control unit may perform the exhaust ventilation operation when the difference between the outdoor temperature and the indoor dew point temperature exceeds the second threshold.

(5) The air conditioner of any one of (1) to (4) further includes a first sensor that is disposed in the indoor unit and detects at least one of indoor temperature and humidity, and the control unit: Indoor temperature and humidity information may be acquired from the first sensor.

(6) The air conditioner according to any one of (1) to (5) further includes a second sensor that is disposed in the outdoor unit and detects at least one of outdoor temperature and humidity, and the control unit: Outdoor temperature and humidity information may be acquired from the second sensor.

(7) In any one of the air conditioners (1) to (6), a communication interface for communicating with an external device may be further provided, and the control unit may acquire outdoor temperature and humidity information from the external device via the communication interface.

(8) In any one of the air conditioners (1) to (7), the control unit acquires information regarding indoor air quality, and controls exhaust ventilation operation or air supply operation based on the information regarding indoor air quality. Either ventilation operation may be performed.

(9) The air conditioner of (8) further includes an indoor air quality sensor that is arranged in the indoor unit and detects information regarding indoor air quality, and the control unit detects information regarding indoor air quality from the indoor air quality sensor. Information may also be obtained.

(10) In any one of the air conditioners (1) to (9), the control unit may acquire information regarding outdoor air quality, and perform either exhaust ventilation operation or supply ventilation operation based on the information regarding the outdoor air quality.

(11) The air conditioner of (10) further includes an outdoor air quality sensor that is arranged in the outdoor unit and detects information regarding outdoor air quality, and the control unit detects information regarding outdoor air quality from the outdoor air quality sensor. Information may also be obtained.

The present disclosure can be applied to an air conditioner that can perform exhaust ventilation operation and supply air ventilation operation.

10, 10A Air conditioner 20 Indoor unit 22 Indoor heat exchanger 24 Indoor fan 26 First sensor 28 Indoor air quality sensor 30 Outdoor unit 32 Outdoor heat exchanger 34 Fan 36 Compressor 38 Expansion valve 40 Four-way valve 42 Second sensor 50 Ventilation device 52 Absorbent material 54 Motor 56 Ventilation conduit 56 Hose 58 First heater 60 Second heater 62 First fan (fan)
64 First damper device (damper)
66 Second damper device (damper)
68 Third damper device (damper)
70 Second fan 72 Remote controller

Claims (11)

An air conditioner comprising an indoor unit and an outdoor unit,
a hose that connects the indoor unit and the outdoor unit and configures an air flow path for ventilation between the outdoors and the indoors;
a fan disposed in the outdoor unit and generating air flow within the hose;
a damper disposed in the outdoor unit and changing the direction of air flow in the hose;
a control unit that controls the fan and the damper;
Equipped with
The control unit includes:
controlling the damper so that air flows from the outdoors into the room in the hose and rotating the fan to draw outdoor air into the room;
an exhaust ventilation operation in which the damper is controlled so that air flows from the indoor to the outdoor within the hose, and the fan is rotated to exhaust indoor air to the outdoor;
Run
Obtaining indoor temperature and humidity information including at least one of indoor temperature and humidity, and outdoor temperature and humidity information including at least one of outdoor temperature and humidity,
executing either the supply air ventilation operation or the exhaust ventilation operation based on the indoor temperature and humidity information and the outdoor temperature and humidity information;
Air conditioner. The indoor temperature and humidity information includes indoor temperature and humidity,
The outdoor temperature and humidity information includes outdoor temperature,
The control unit calculates an indoor dew point temperature based on the indoor temperature and humidity, and controls the exhaust ventilation operation or the supply air ventilation operation based on the difference between the outdoor temperature and the indoor dew point temperature. execute one of the
The air conditioner according to claim 1. The control unit executes the supply ventilation operation when a difference between the outdoor temperature and the indoor dew point temperature is lower than a first threshold value.
The air conditioner according to claim 2. The control unit executes the exhaust ventilation operation when a difference between the outdoor temperature and the indoor dew point temperature exceeds a second threshold value.
The air conditioner according to claim 2. A first sensor disposed in the indoor unit and detecting at least one of a temperature and a humidity in the room;
Further equipped with
The control unit acquires the indoor temperature and humidity information from the first sensor.
The air conditioner according to claim 1. a second sensor disposed in the outdoor unit and detecting at least one of an outdoor temperature and an outdoor humidity;
Further equipped with
The control unit acquires the outdoor temperature and humidity information from the second sensor.
The air conditioner according to claim 1. a communication interface for communicating with external devices;
Furthermore,
The control unit acquires the outdoor temperature and humidity information from the external device via the communication interface.
The air conditioner according to claim 1. The control unit acquires information regarding indoor air quality,
executing either the exhaust ventilation operation or the supply ventilation operation based on the information regarding the indoor air quality;
The air conditioner according to claim 1. an indoor air quality sensor that is arranged in the indoor unit and detects information regarding indoor air quality;
Furthermore,
The control unit acquires information regarding the indoor air quality from the indoor air quality sensor.
The air conditioner according to claim 8. The control unit acquires information regarding outdoor air quality,
executing either the exhaust ventilation operation or the supply ventilation operation based on the information regarding the outdoor air quality;
The air conditioner according to claim 1. an outdoor air quality sensor that is placed in the outdoor unit and detects information regarding outdoor air quality;
Furthermore,
The control unit acquires information regarding the outdoor air quality from the outdoor air quality sensor.
The air conditioner according to claim 10.

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