JP2024104467A - Air conditioners - Google Patents

Abstract

To provide an air conditioner capable of easily removing dew condensation in a hose.SOLUTION: An air conditioner of the present disclosure is an air conditioner comprising an indoor unit and an outdoor unit. The air conditioner comprises: a hose that connects the indoor unit and the outdoor unit to form an air flow path for performing ventilation between the outdoors and the indoors, and is provided with a drain port between an indoor end part and an outdoor end part; a fan that is arranged in the outdoor unit, and generates an air flow in the hose; a damper that is arranged in the outdoor unit, and changes the direction of an air flow in the hose; and a control unit that controls the fan and the damper. The control unit executes an air supply ventilation operation in which the damper is controlled to cause air to flow from the outdoors to the indoors in the hose and the fan is rotated to take in outdoor air to the inside, and an exhaust ventilation operation in which the damper is controlled to cause air to flow from the indoors to the outdoors in the hose and the fan is rotated to exhaust indoor air to the outside, and during execution of the air supply ventilation operation or exhaust ventilation operation, water in the hose is discharged from the drain port by controlling a rotation speed of the fan.SELECTED DRAWING: Figure 7

Description

This disclosure relates to an air conditioner.

In recent years, air conditioners have been developed that can exchange air between the indoor and outdoor spaces.

For example, Patent Document 1 discloses an air conditioner that is equipped with a humidifying function that uses an adsorbent and also has a ventilation function.

Patent No. 4337402

The air conditioner described in Patent Document 1 still has room for improvement in that condensation water cannot be easily removed from inside the hose connecting the indoor unit and the outdoor unit.

This disclosure provides an air conditioner that can easily remove condensation water from inside the hose.

An air conditioner according to one aspect of the present disclosure includes:
An air conditioner having an indoor unit and an outdoor unit,
a hose that connects the indoor unit and the outdoor unit, forms an air flow path for ventilating the indoors and the outdoors, and has a drain outlet between an end on the indoor side and an end on the outdoor side;
A fan disposed in the outdoor unit and generating an air flow within the hose;
a damper disposed in the outdoor unit to change the direction of air flow in the hose;
A control unit that controls the fan and the damper;
Equipped with
The control unit is
an air supply ventilation operation in which the damper is controlled to rotate the fan so that air flows from the outside to the room through the hose, and outdoor air is taken into the room;
an exhaust ventilation operation in which the damper is controlled to rotate the fan so that air flows from the room to the outside through the hose, and the indoor air is exhausted to the outside;
Run
During the supply ventilation operation or the exhaust ventilation operation, the rotation speed of the fan is controlled to discharge water from within the hose through the drain outlet.

This disclosure provides an air conditioner that can easily remove condensation water from inside the hose.

1 is a schematic diagram of an air conditioner according to a first embodiment 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 FIG. 1 is a block diagram showing a configuration for controlling an air conditioner according to a first embodiment of the present disclosure. Schematic diagram of a portion of a hose A flowchart for explaining the operation of the air conditioner according to the first embodiment of the present disclosure. FIG. 11 is a block diagram showing a configuration for controlling an air conditioner according to a second embodiment of the present disclosure. 11 is a flowchart for explaining the operation of an air conditioner according to a second embodiment of the present disclosure.

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 this embodiment has an indoor unit 20 arranged in the room Rin to be air-conditioned, and an outdoor unit 30 arranged in the 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 is provided with an outdoor heat exchanger 32 that exchanges heat with the outdoor air A2, and a fan 34 that draws the outdoor air A2 into the outdoor unit 30 and blows the outdoor air A2 after heat exchange with the outdoor heat exchanger 32 out to the outdoor 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.

Figure 2 is a schematic diagram of the ventilation system.

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 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 the present embodiment, the absorbent 52 is disk-shaped and rotates around a rotation center line C1 that passes through its center. The absorbent 52 is driven to rotate by a motor 54. Note that while FIG. 2 shows the absorbent 52 rotating clockwise, the rotation direction of the absorbent 52 may be either clockwise or counterclockwise. Similarly, in FIGS. 3 to 6 described below, the rotation direction of the absorbent 52 may be either clockwise or counterclockwise.

The absorbent 52 is preferably a polymeric adsorbent that adsorbs moisture in the air. The polymeric adsorbent is, for example, composed of a cross-linked sodium polyacrylate. Compared to adsorbents such as silica gel and zeolite, the polymeric adsorbent absorbs a greater amount of moisture per volume, can desorb the moisture it holds at a low heating temperature, and can hold the moisture for a long period of time.

Inside the ventilation device 50, a first flow path P1 and a second flow path P2 are provided, through which the outdoor air A3 and A4 flow, respectively, passing through the absorbent material 52. The first flow path P1 and the second flow path P2 pass through the absorbent material 52 at different positions. Furthermore, inside the ventilation device 50, a third flow path P3 is provided, the both ends of which 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 this embodiment, the first flow path P1 includes multiple tributary paths P1a and P1b upstream of the absorbent material 52. In this specification, the terms "upstream" and "downstream" are used with respect to the 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, 60 may be heaters with the same heating capacity or heaters with different heating capacities. In addition, the first and second heaters 58, 60 are preferably PTC (Positive Temperature Coefficient) heaters, which increase electrical resistance when current flows and the temperature rises, i.e., can suppress excessive increases 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, 60 may be heaters that use 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 this embodiment, the second damper device 66 is disposed between the absorbent material 52 and the first fan 62. As will be described in detail 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 this embodiment, the second fan 70 is disposed downstream of the absorbent material 52. When the second fan 70 is operated, the outdoor air A4 flows from the outdoor Rout into the second flow path P2, passes through the absorbent material 52, and 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 an OFF state, so that no flow of outdoor air A4 is generated in the second flow path P2. Note that the rotation of the absorbent material 52 may be stopped when the supply ventilation operation is performed.

According to this supply ventilation 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. The outdoor air A3 that has passed through the absorbent 52 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. According to this supply ventilation operation, the outdoor air A3 is supplied as is to the room Rin, and the room Rin is ventilated.

Figure 4 is a schematic diagram of the ventilation device during exhaust ventilation operation.

The exhaust ventilation operation is an air conditioning operation that exhausts the indoor air A1 to the outdoor Rout. As shown in FIG. 4, during the exhaust ventilation operation, the motor 54 is in the OFF state, and the absorbent 52 is not rotating. The first heater 58 and the second heater 60 are in the OFF state. The first fan 62 is in the ON state, whereby the indoor air A1 passes through the ventilation duct 56 and the third flow path P3 and flows toward the first fan 62. The first damper device 64 is in the open state, whereby the indoor air A1 in the first flow path P1 is distributed to the outdoor Rout. The second damper device 66 is in the closed state, whereby the indoor air A1 does not flow toward the absorbent 52. The third damper device 68 is in the open state, whereby the indoor air A1 flows toward the first fan 62 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 this type of exhaust ventilation operation, when the first fan 62 is ON, the indoor air A1 flows into the portion of the first flow path P1 between the absorbent 52 and the first fan 62 via the ventilation duct 56 and the third flow path P3. At this time, the second damper device 66 is in a closed state, so the indoor air A1 does not flow toward the absorbent 52. The indoor air A1 that has passed through the first fan 62 is distributed to the outdoor air Rout by the first damper device 64 and discharged to the outdoor air Rout. As a result, the indoor air Rin is ventilated.

The third flow path P3 allows the first fan 62 to rotate in the same direction during exhaust ventilation operation as during supply 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 room Rin (i.e., the indoor unit 20). As shown in FIG. 5, during the humidification operation, the motor 54 continues to rotate the absorbent 52. 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 and thereby the outdoor air A3 flows through the first flow path P1. The first damper device 64 is in the closed state and thereby distributes the outdoor air A3 in the first flow path P1 to the indoor unit 20. The second damper device 66 is in the open state and thereby the outdoor air A3 flows from the absorbent 52 toward the first fan 62. The third damper device 68 is in the closed state and thereby the outdoor air A3 does not flow through the third flow path P3. The second fan 70 is ON, causing outdoor air A4 to flow 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 room Rin (i.e., the indoor unit 20). As shown in FIG. 6, in the dehumidification operation, the adsorption operation and the regeneration operation are performed alternately.

The adsorption operation is an operation in which moisture carried in the outdoor air A3 is adsorbed by the absorbent 52, thereby dehumidifying the outdoor air A3. As shown in FIG. 6, during the adsorption 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 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 held by the absorbent 52 continues to increase, and as a result, the adsorption capacity of the absorbent 52 for the moisture held in the outdoor air A3 decreases. In order to recover the adsorption capacity, a regeneration operation is performed to regenerate the absorbent 52.

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 is in a closed state and 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 in an open state and causes the outdoor air A3 to flow from the absorbent 52 toward the first fan 62. The third damper device 68 is in a closed state 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 alternating between adsorption and regeneration operations in this manner, the adsorption capacity of the absorbent 52 is maintained, and dehumidification operation can be performed continuously.

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.

So far, we have given an overview of the configuration and operation of the air conditioner 10 according to this embodiment. From here on, we will explain further features of the air conditioner 10 according to this embodiment.

Figure 7 is a block diagram showing the configuration for controlling the air conditioner 10 according to the first embodiment of the present disclosure.

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 control unit 80 that controls the indoor unit 20 and the outdoor unit 30, and a hose 56 that connects the indoor unit 20 and the outdoor unit 30. The indoor unit 20 includes an indoor heat exchanger 22 and an indoor fan 24. The outdoor unit 30 includes a ventilation device 50, which includes a fan 62 and dampers 64, 66, and 68. The hose 56 corresponds to the above-mentioned ventilation duct 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, second damper device 66, and third damper device 68, respectively. The fan 62 and dampers 64, 66, and 68 are disposed in the ventilation device 50 provided in the outdoor unit 30.

The hose 56 connects the indoor unit 20 and the outdoor unit 30, and constitutes 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.

Figure 8 is a schematic diagram of a portion of the hose 56.

8, in this embodiment, the hose 56 is provided with a drain outlet 56a between the end on the indoor Rin side and the end on the outdoor Rout side. More specifically, the drain outlet 56a is provided at the spatially lowest position of the hose 56. By providing the drain outlet 56a in the hose 56, a downward gradient is formed in the hose 56 from the indoor unit 20 toward the drain outlet 56a, and a downward gradient is formed from the outdoor unit 30 toward the drain outlet 56a. When the supply and exhaust operation, exhaust ventilation operation, or humidification operation is performed, condensation water Wa may be generated inside the hose 56 due to the difference between the indoor temperature and the outdoor temperature, or the difference between the indoor humidity and the outdoor humidity. For example, when the air in the outdoor Rout is hotter and more humid than the air in the indoor Rin, the supply and ventilation operation or the humidification operation is performed, the hot and humid air in the outdoor Rout is cooled inside the hose 56, and condensation water Wa may be generated. At this time, the condensed water Wa is pushed by the air moving inside the hose 56 from the outdoor Rout to the indoor Rin, and moves toward the indoor unit 20. Also, if the air inside the room Rin is hotter and more humid than the air outside Rout, condensed water Wa may be generated inside the hose when exhaust ventilation operation is performed. At this time, the condensed water Wa is pushed by the air moving inside the hose 56 from the indoor Rin to the outdoor Rout, and moves toward the outdoor unit 30. By reducing the volume of air in the hose 56, the condensed water Wa can be discharged from the drain outlet 56a to the outside of the hose 56 due to gravity.

The control unit 80 includes, for example, a memory that stores a program, a processing circuit corresponding to a processor such as a CPU (Central Processing Unit), and a communication circuit for reading externally stored data or programs. 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 or obtained by communication with an external storage location, and performing various arithmetic processing.

The control unit 80 controls the fan 62 and the 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 within the hose 56, and rotates the fan 62 to perform an air supply ventilation operation in which the air from the outdoor Rout is taken into the indoor Rin. 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 to perform an exhaust ventilation operation in which the air from the indoor Rin is exhausted to the outdoor Rout. That is, in this embodiment, the control unit 80 performs an air supply ventilation operation and an exhaust ventilation operation.

The control unit 80 also controls the rotation speed of the fan 62 during supply ventilation operation or exhaust ventilation operation to discharge the condensed water Wa in the hose 56 from the drain outlet 56a. Specifically, the control unit 80 reduces the volume of air in the hose 56 by temporarily lowering or stopping the rotation speed of the fan 62 during supply ventilation operation or exhaust ventilation operation. As a result, the condensed water Wa in the hose 56 flows through the hose 56 according to gravity and is discharged from the drain outlet 56a.

Figure 9 is a flowchart for explaining the operation of the air conditioner 10 according to the first embodiment of the present disclosure. The operation of the air conditioner 10 will be explained with reference to Figure 9.

In this embodiment, the rotation speed of the fan 62 is controlled during supply ventilation operation or exhaust ventilation operation to discharge condensation water Wa from inside the hose 56 through the drain outlet 56a.

First, in step S11, the control unit 80 determines whether or not supply ventilation operation or exhaust ventilation operation is being performed. For example, the control unit 80 can determine that supply ventilation operation or exhaust ventilation operation is being performed based on the fact that the supply ventilation operation or exhaust ventilation operation execution flag is ON. Also, the control unit 80 can determine that supply ventilation operation or exhaust ventilation operation is not being performed based on the fact that the supply ventilation operation or exhaust ventilation operation execution flag is OFF.

If the control unit 80 determines that supply ventilation operation or exhaust ventilation operation is being performed, the process proceeds to step S12. If the control unit 80 determines that supply ventilation operation or exhaust ventilation operation is not being performed, the process ends.

In step S12, the control unit 80 controls the rotation speed of the fan 62. For example, the control unit 80 may reduce the rotation speed of the fan 62 to approximately 50% of the rotation speed of the fan 62 during supply ventilation operation or exhaust ventilation operation. For example, if the rotation speed of the fan 62 during supply ventilation operation or exhaust ventilation operation is approximately 5000 ppm, in step S12, the control unit 80 reduces the rotation speed of the fan 62 to approximately 2500 ppm. After the process of step S12 is executed, the process ends.

The control of the rotation speed of the fan 62 can be continued for a predetermined period of time, for example. For example, while the supply ventilation operation or exhaust ventilation operation is being performed, the control unit 80 may reduce the rotation speed of the fan 62 for about 1 to 2 minutes.

By reducing the rotation speed of the fan 62 while the supply ventilation operation or exhaust ventilation operation is being performed, it is possible to make it easier to discharge the condensation water Wa that has formed inside the hose 56.

The processing of steps S11 to S12 can be performed, for example, at a predetermined time interval. By performing the processing of steps S11 to S12 at a predetermined time interval, the condensed water Wa in the hose 56 can be periodically discharged.

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

The air conditioner 10 includes an indoor unit 20 and an outdoor unit 30. The air conditioner 10 includes 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 forms an air flow path for ventilation between the outdoor Rout and the indoor Rin, and a drain outlet 56a is provided between the end on the indoor Rin side and the end on the outdoor Rout side. 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 the supply ventilation operation and the exhaust ventilation operation, and while the supply ventilation operation or the exhaust ventilation operation is being executed, the rotation speed of the fan 62 is controlled to discharge the water Wa in the hose 56 from the drain outlet 56a. In the supply ventilation operation, the dampers 64, 66, and 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 the air in the outdoor Rout into the indoor Rin. In the exhaust ventilation operation, the dampers 64, 66, and 68 are controlled so that air flows from the indoor Rin to the outdoor Rout in the hose 56, and the fan 62 is rotated to discharge the air in the indoor Rin to the outdoor Rout.

With this configuration, condensation water Wa generated in the hose 56 during the supply ventilation operation or exhaust ventilation operation can be easily discharged outside the hose 56. Condensation water Wa may be generated in the hose 56 during the supply ventilation operation or exhaust ventilation operation. By lowering the rotation speed of the fan 62 during the supply ventilation operation or exhaust ventilation operation, the condensation water Wa in the hose 56 can be discharged from the drain outlet 56a according to gravity. When there is condensation water Wa in the hose 56 and airflow occurs in the hose 56, the wind hits the condensation water Wa and splashes it around inside the hose 56, making a popping sound and causing noise. According to the above-mentioned embodiment, the condensation water Wa can be easily discharged, thereby reducing noise.

In the above embodiment, an example has been described in which the control unit 80 executes control to reduce the rotation speed of the fan 62 in step S12, but this is not limiting. In step S12, the control unit 80 may execute other control, such as stopping the fan 62.

The control of steps S11 to S12 in the above-described embodiment may be performed periodically while the air conditioner 10 is in operation. In this case, the condensed water Wa can be periodically discharged into the hose 56, thereby suppressing the occurrence of mold and mildew within the hose 56.

In addition, when exhaust ventilation operation is being performed in the air conditioner 10, negative pressure is created inside the hose 56, making it difficult for the condensed water Wa to be discharged from the drain outlet 56a. For this reason, performing the control of steps S11 to S12 of the above-described embodiment during exhaust ventilation operation is particularly effective in terms of discharging the condensed water Wa.

(Embodiment 2)
A second embodiment will be described with reference to Figures 10 and 11. In the second embodiment, the same or equivalent configurations as those in the first embodiment will be denoted by the same reference numerals. In the second embodiment, descriptions that overlap with those in the first embodiment will be omitted.

Figure 10 is a block diagram showing a configuration for controlling an air conditioner according to embodiment 2 of the present disclosure. Figure 11 is a flowchart for explaining the operation of an air conditioner according to embodiment 2 of the present disclosure.

As shown in FIG. 10, the air conditioner 10A according to the second embodiment differs from the first embodiment in that it includes sensors 26, 42 that detect the humidity of the air flowing through the hose 56. It also differs from the first embodiment in that the control unit 80 controls the rotation speed of the fan 62 to drain the water in the hose 56 from the drain outlet 56a when the humidity in the hose 56 detected by the sensors 26, 42 exceeds a predetermined threshold.

As shown in FIG. 10, the air conditioner 10 is equipped with sensors 26, 42. The sensors 26, 42 include a first sensor 26 arranged at an opening on the indoor Rin side of the hose 56, and a second sensor 42 arranged at an opening on the outdoor Rout side of the hose 56. The opening on the indoor Rin side of the hose 56 is an outlet for air from the hose 56 to the indoor Rin. The opening on the outdoor Rout side of the hose 56 is an outlet for air from the hose 56 to the outdoor Rout. The sensors 26, 42 may be temperature sensors that detect temperature, or temperature and humidity sensors that can detect temperature and humidity.

The first sensor 26 can detect the humidity of the air when the air in the outdoor room Rout is discharged to the indoor room Rin through the hose 56. The second sensor 42 can detect the humidity of the air when the air in the indoor room Rin is discharged to the outdoor room Rout through the hose 56. In other words, the first sensor 26 and the second sensor 42 both detect the humidity of the air when it passes through the hose 56 and is discharged from the hose 56.

When the humidity detected by the first sensor 26 is equal to or greater than a predetermined threshold during the supply ventilation operation, the control unit 80 reduces the rotation speed of the fan 62 or stops the fan 62. If condensed water Wa occurs in the hose 56 during the supply ventilation operation, the humidity of the air discharged from the hose 56 to the room Rin increases due to the influence of the condensed water Wa. Therefore, when the humidity detected by the first sensor 26 is equal to or greater than a predetermined threshold during the supply ventilation operation, the control unit 80 may control the fan 62 to discharge the condensed water Wa from the drain outlet 56a.

When the humidity detected by the second sensor 42 is equal to or greater than a predetermined threshold during exhaust ventilation operation, the control unit 80 reduces the rotation speed of the fan 62 or stops the fan 62. If condensed water Wa occurs in the hose 56 during exhaust ventilation operation, the humidity of the air discharged from the hose 56 to the outside Rout increases due to the influence of the condensed water Wa. Therefore, when the humidity detected by the second sensor 42 is equal to or greater than a predetermined threshold during exhaust ventilation operation, the control unit 80 may control the fan 62 to discharge the condensed water Wa from the drain outlet 56a.

Figure 11 is a flowchart showing the operation of the air conditioner 10A according to the second embodiment. The operation of the air conditioner 10A will be described with reference to Figure 11.

In step S21, the control unit 80 determines whether or not supply ventilation operation is being performed. The control unit 80 can determine that supply ventilation operation is being performed based on the fact that the supply ventilation operation execution flag is ON. If the control unit 80 determines that supply ventilation operation is being performed, the process proceeds to step S22. If the control unit 80 determines that supply ventilation operation is not being performed, the process proceeds to step S23.

In step S22, the control unit 80 determines whether the humidity detected by the first sensor 26 is equal to or greater than a predetermined threshold. If the control unit 80 determines that the humidity detected by the first sensor 26 is equal to or greater than the predetermined threshold, the process proceeds to step S25. If the supply ventilation operation is being performed and the humidity detected by the first sensor 26 is equal to or greater than the predetermined threshold, it can be assumed that condensation water Wa has occurred in the hose 56. For this reason, the process proceeds to step S25, and the rotation speed of the fan 62 is controlled. If the control unit 80 determines that the humidity detected by the first sensor 26 is less than the predetermined threshold, the process ends.

In step S23, the control unit 80 determines whether exhaust ventilation operation is being performed. The control unit 80 can determine that exhaust ventilation operation is being performed based on the exhaust ventilation operation execution flag being ON. If the control unit 80 determines that exhaust ventilation operation is being performed, the process proceeds to step S24. If the control unit 80 determines that exhaust ventilation operation is not being performed, the process ends.

In step S24, the control unit 80 determines whether the humidity detected by the second sensor 42 is equal to or greater than a predetermined threshold. If the control unit 80 determines that the humidity detected by the second sensor 42 is equal to or greater than the predetermined threshold, the process proceeds to step S25. If exhaust ventilation operation is being performed and the humidity detected by the second sensor 42 is equal to or greater than the predetermined threshold, it can be assumed that condensed water Wa has formed in the hose 56. For this reason, the process proceeds to step S25, and the rotation speed of the fan 62 is controlled. If the control unit 80 determines that the humidity detected by the second sensor 42 is less than the predetermined threshold, the process ends.

In step S25, the control unit 80 controls the rotation speed of the fan 62. For example, the control unit 80 may reduce the rotation speed of the fan 62 to approximately 50% of the rotation speed of the fan 62 during the supply ventilation operation or the exhaust ventilation operation. Alternatively, the control unit 80 may stop the rotation of the fan 62. Step S25 is executed, and the process ends.

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

The air conditioner 10A further includes sensors 26, 42 that detect the humidity of the air flowing through the hose 56. When the humidity inside the hose 56 detected by the sensors 26, 42 is equal to or greater than a predetermined threshold, the control unit 80 controls the rotation speed of the fan 62 to discharge the water Wa inside the hose 56 from the drain outlet 56a.

With this configuration, the occurrence of condensation water Wa inside the hose 56 can be easily detected by the first sensor 26 and the second sensor 42. Therefore, the rotation speed of the fan 62 can be controlled at an appropriate timing based on the detection results of the sensors 26 and 42 to discharge the water Wa from the drain outlet 56a.

The sensor includes a first sensor 26 disposed at an opening on the room Rin side of the hose 56. The control unit 80 reduces the rotation speed of the fan 62 or stops the fan 62 when the humidity detected by the first sensor 26 during supply ventilation operation is equal to or greater than a predetermined threshold value.

With this configuration, it is possible to determine whether or not condensed water Wa has formed inside the hose 56 by detecting the humidity of the air passing through the hose 56 while the supply ventilation operation is being performed. Therefore, it is possible to determine at an appropriate time whether or not condensed water Wa has formed inside the hose 56 while the supply ventilation operation is being performed, based on the humidity detected by the first sensor 26. Therefore, it is possible to control the fan 62 to discharge the condensed water Wa outside the hose 56 at an appropriate time.

The sensor includes a second sensor 42 disposed at an opening on the outdoor Rout side in the hose 56. The control unit 80 reduces the rotation speed of the fan 62 or stops the fan 62 when the humidity detected by the second sensor 42 during exhaust ventilation operation is equal to or greater than a predetermined threshold value.

With this configuration, it is possible to determine whether condensation water Wa has formed inside the hose 56 by detecting the humidity of the air passing through the hose 56 while exhaust ventilation operation is being performed. Therefore, it is possible to determine at an appropriate time whether condensation water Wa has formed inside the hose 56 while supply ventilation operation is being performed, based on the humidity detected by the second sensor 42. Therefore, it is possible to control the fan 62 to discharge the condensation water Wa outside the hose 56 at an appropriate time.

In the above-described embodiment, an example in which the air conditioner 10A is equipped with two sensors, the first sensor 26 and the second sensor 42, has been described, but this is not limiting. It is sufficient for the air conditioner 10A to be equipped with at least one of the first sensor 26 and the second sensor 42.

In the above-described embodiment, an example has been described in which the rotation speed of the fan 62 is controlled based on the humidity in the hose 56 detected by the sensor during the supply ventilation operation or the exhaust ventilation operation, but this is not limiting. For example, the control unit 80 may perform a humidification operation in which humidified air is taken in from the outdoor Rout to the indoor Rin. The control unit 80 may reduce the rotation speed of the fan 62 or stop the fan 62 when the humidity detected by the first sensor 26 during the humidification operation is equal to or greater than a predetermined threshold value. In the case of the humidification operation, the air in the outdoor Rout is taken in through the hose 56, as in the supply ventilation operation. Therefore, by controlling the rotation speed of the fan 62 based on the humidity detected by the first sensor 26, the water Wa in the hose 56 can be easily discharged.

In the above-described embodiment, an example has been described in which the control unit 80 executes control to reduce the rotation speed of the fan 62 or stop the fan 62, but this is not limiting. For example, when the humidity detected by the first sensor 26 is continuously equal to or greater than a predetermined threshold for a predetermined period of time or more, the control unit 80 may increase the rotation speed of the fan 62 to guide the water Wa in the hose 56 to the drain outlet 56a.

In the above-described embodiment, when the humidity detected by the sensor 26 during the supply ventilation operation is equal to or greater than a predetermined threshold, the rotation speed of the fan 62 is reduced or stopped, and the water Wa in the hose 56 is guided to the drain outlet 56a by gravity. However, even if the control unit 80 reduces the rotation speed of the fan 62 or stops the fan 62, the humidity detected by the first sensor 26 may not decrease. This indicates that the condensed water Wa in the hose 56 is not properly discharged outside the hose 56. For this reason, when the humidity detected by the first sensor 26 continues to exceed the predetermined threshold for a predetermined period of time or more, the rotation speed of the fan 62 may be increased to guide the water in the hose 56 to the drain outlet 56a.

In this case, the control unit 80 controls the dampers 64, 66, and 68 so that air flows through the hose 56 from the room Rin to the room Rout. That is, when the humidity detected by the first sensor is continuously equal to or greater than a predetermined threshold for a predetermined period of time or more during the supply ventilation operation, the control unit 80 can temporarily switch to exhaust ventilation operation and guide the condensation water Wa remaining in the hose 56 toward the drain outlet 56a.

In the above-described embodiment, an example has been described in which the rotation speed of the fan 62 is controlled when the humidity detected by the first sensor 26 is equal to or higher than a predetermined threshold value during supply ventilation operation, but this is not limiting. For example, the rotation speed of the fan 62 may be controlled based on the dew point temperature of the air flowing from the outdoor area Rout into the hose 56 and the temperature of the air discharged from the hose 56 into the indoor area Rin. In this case, the first sensor 26 is configured as a temperature sensor that detects temperature, and the second sensor 42 is configured as a temperature and humidity sensor that detects temperature and humidity.

When the control unit is performing the supply ventilation operation, the rotation speed of the fan 62 may be controlled if the dew point temperature calculated based on the temperature and humidity of the air detected by the second sensor 42 is equal to or lower than the temperature of the air detected by the first sensor 26. The second sensor 42 detects the temperature and humidity of the air flowing into the hose 56 from the outdoor Rout. The first sensor 26 detects the temperature of the air discharged from the hose 56 to the indoor Rin. More specifically, the dew point temperature of the outdoor air A3 is calculated based on the temperature and humidity of the outdoor air A3 detected by the second sensor 42, and the temperature of the air discharged from the hose 56 to the indoor Rin detected by the first sensor 26 is compared with the dew point temperature of the outdoor air A3. That is, the dew point temperature of the air flowing into the hose 56 is compared with the temperature of the air discharged from the hose 56. When the dew point temperature of the outdoor air A3 is equal to or higher than the temperature of the air discharged from the hose 56, condensation is likely to occur in the hose 56. On the other hand, if the dew point temperature of the outdoor air A3 is lower than the temperature of the air when it is discharged from the hose 56, condensation is unlikely to occur inside the hose 56. Therefore, in step S22 of FIG. 11, if the dew point temperature calculated based on the detection value of the second sensor 42 is equal to or higher than the temperature detected by the first sensor 26, the process proceeds to step S25 and the rotation speed of the fan 62 is controlled.

In the above embodiment, an example has been described in which the rotation speed of the fan 62 is controlled when the humidity detected by the second sensor 42 is equal to or higher than a predetermined threshold value during exhaust ventilation operation, but this is not limiting. For example, the rotation speed of the fan 62 may be controlled based on the dew point temperature of the air flowing from the room Rin into the hose 56 and the temperature of the air exhausted from the hose 56 to the outside Rout. In this case, the first sensor 26 is configured with a temperature and humidity sensor that detects temperature and humidity, and the second sensor 42 is configured with a temperature sensor that detects temperature.

When the control unit is performing the exhaust ventilation operation, the rotation speed of the fan 62 may be controlled if the dew point temperature calculated based on the temperature and humidity of the air detected by the first sensor 26 is equal to or lower than the temperature of the air detected by the second sensor 42. The first sensor 26 detects the temperature and humidity of the air flowing from the room Rin into the hose 56. The second sensor 42 detects the temperature of the air discharged from the hose 56 to the outside Rout. More specifically, the dew point temperature of the indoor air A1 is calculated based on the temperature and humidity of the indoor air A1 detected by the first sensor 26, and the temperature of the air discharged from the hose 56 to the outside Rout detected by the second sensor 42 is compared with the dew point temperature of the indoor air A1. That is, the dew point temperature of the air flowing into the hose 56 is compared with the temperature of the air discharged from the hose 56. When the dew point temperature of the indoor air A1 is equal to or higher than the temperature of the air discharged from the hose 56, condensation is likely to occur in the hose 56. On the other hand, if the dew point temperature of the indoor air A1 is lower than the temperature of the air when it is discharged from the hose 56, condensation is unlikely to occur inside the hose 56. Therefore, if the dew point temperature calculated based on the detection value of the first sensor in step S23 of FIG. 11 is equal to or higher than the temperature detected by the second sensor 42, the process proceeds to step S25 and the rotation speed of the fan 62 is controlled.

(Overview of the embodiment)
(1) The air conditioner of the present disclosure is an air conditioner including an indoor unit and an outdoor unit, the air conditioner including a hose that connects the indoor unit and the outdoor unit to form an air flow path for ventilating between the outdoors and the indoors, the hose having a drain outlet between an indoor end and an outdoor end, a fan that is disposed in the outdoor unit and generates an air flow in the hose, a damper that is disposed in the outdoor unit and changes the direction of the air flow in the hose, and a control unit that controls the fan and the damper, the control unit performing an supply 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 room, 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 outside, and while the supply ventilation operation or the exhaust ventilation operation is being performed, water in the hose is discharged from the drain outlet by controlling the rotation speed of the fan.

(2) The air conditioner of (1) may further include a sensor that detects the humidity of the air flowing through the hose, and the control unit may control the rotation speed of the fan to drain water from the hose through the drain when the humidity in the hose detected by the sensor is equal to or greater than a predetermined threshold.

(3) In the air conditioner of (2), the sensor includes a first sensor disposed at the opening of the hose on the indoor side, and the control unit may reduce the rotation speed of the fan or stop the fan when the humidity detected by the first sensor is equal to or greater than a predetermined threshold value during supply ventilation operation.

(4) In the air conditioner of (3), the sensor may include a second sensor disposed at the outdoor opening of the hose, and the control unit may reduce the rotation speed of the fan or stop the fan when the humidity detected by the second sensor is equal to or greater than a predetermined threshold value during exhaust ventilation operation.

(5) In the air conditioner of (4), when the control unit is performing supply ventilation operation, if the dew point temperature calculated based on the temperature and humidity of the air flowing into the hose from the outside detected by the second sensor is equal to or lower than the temperature of the air exhausted from the hose into the room detected by the first sensor, the fan speed may be reduced or the fan may be stopped.

(6) In the air conditioner of (4) or (5), when the control unit is performing exhaust ventilation operation, if the dew point temperature calculated based on the temperature and humidity of the air flowing from the room into the hose detected by the first sensor is equal to or lower than the temperature of the air exhausted from the hose to the outside detected by the second sensor, the fan speed may be reduced or the fan may be stopped.

(7) In any one of the air conditioners (3) to (6), the control unit may perform a humidification operation to take in humidified air from outside the room into the room, and may reduce the rotation speed of the fan or stop the fan if the humidity detected by the first sensor during the humidification operation is equal to or greater than a predetermined threshold value.

(8) In any one of the air conditioners (3) to (7), the control unit may increase the fan speed to guide the water in the hose to the drain outlet when the humidity detected by the first sensor is continuously equal to or greater than a predetermined threshold for a predetermined period of time or more.

This disclosure can be applied to air conditioners capable of performing supply ventilation operation, humidification operation, and exhaust 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 Ventilator 52 Absorbing material 54 Motor 56 Ventilation duct (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 80 Control unit

Claims (8)

An air conditioner having an indoor unit and an outdoor unit,
a hose that connects the indoor unit and the outdoor unit, forms an air flow path for ventilating the indoors and the outdoors, and has a drain outlet between an end on the indoor side and an end on the outdoor side;
A fan disposed in the outdoor unit and generating an air flow within the hose;
a damper disposed in the outdoor unit to change the direction of air flow in the hose;
A control unit that controls the fan and the damper;
Equipped with
The control unit is
an air supply ventilation operation in which the damper is controlled to rotate the fan so that air flows from the outside to the room through the hose, and outdoor air is taken into the room;
an exhaust ventilation operation in which the damper is controlled to rotate the fan so that air flows from the room to the outside through the hose, and the indoor air is exhausted to the outside;
Run
During the supply ventilation operation or the exhaust ventilation operation, the rotation speed of the fan is controlled to discharge water in the hose from the drain outlet.
Air conditioner. a sensor for detecting at least one of the humidity and the temperature of the air flowing through the hose;
Equipped with
The control unit controls a rotation speed of the fan to discharge water in the hose from the drain outlet when the humidity in the hose detected by the sensor is equal to or higher than a predetermined threshold.
The air conditioner according to claim 1. The sensor includes a first sensor disposed at an opening of the hose on the indoor side,
The control unit is
When the humidity detected by the first sensor is equal to or higher than a predetermined threshold during the supply ventilation operation, the rotation speed of the fan is reduced or the fan is stopped.
The air conditioner according to claim 2. The sensor includes a second sensor disposed at an opening of the hose on the outdoor side,
The control unit is
When the humidity detected by the second sensor is equal to or higher than a predetermined threshold during the exhaust ventilation operation, the rotation speed of the fan is reduced or the fan is stopped.
The air conditioner according to claim 3. When the control unit is performing the supply air ventilation operation, if a dew point temperature calculated based on the temperature and humidity of air flowing into the hose from the outside and detected by the second sensor is equal to or lower than the temperature of air discharged into the room from the hose and detected by the first sensor, the control unit reduces the rotation speed of the fan or stops the fan.
The air conditioner according to claim 4. When the control unit is performing the exhaust ventilation operation, if a dew point temperature calculated based on the temperature and humidity of the air flowing into the hose from the indoors detected by the first sensor is equal to or lower than the temperature of the air exhausted to the outdoor from the hose detected by the second sensor, the control unit reduces the rotation speed of the fan or stops the fan.
The air conditioner according to claim 4. The control unit is
The humidification operation is performed by taking in humidified air from outside into the room.
When the humidity detected by the first sensor during the humidification operation is equal to or higher than a predetermined threshold, the rotation speed of the fan is reduced or the fan is stopped.
The air conditioner according to claim 3. The control unit increases a rotation speed of the fan to guide the water in the hose to the drain outlet when the humidity detected by the first sensor is continuously equal to or higher than the predetermined threshold for a predetermined time or more.
5. The air conditioner according to claim 3 or 4.

Images