WO2020100395A1

WO2020100395A1 - Air conditioner

Info

Publication number: WO2020100395A1
Application number: PCT/JP2019/035601
Authority: WO
Inventors: 貴裕仲田; 伊藤　裕; 顕木下; 純也米田
Original assignee: ダイキン工業株式会社
Priority date: 2018-11-14
Filing date: 2019-09-11
Publication date: 2020-05-22
Also published as: CN112823262B; JP6743869B2; CN112823262A; EP3862642A4; EP3862642A1; JP2020079684A

Abstract

An air conditioner comprises: a refrigerant circuit (RC); an indoor unit (1) that has a casing and an indoor fan (12); a humidified air supply device (3) that supplies humidified air to inside the casing; and a control device that controls the refrigerant circuit (RC) and the humidified air supply device (3) and performs a cleaning operation to supply humidified air from the humidified air supply device (3) to inside the casing and clean an indoor heat exchanger (11) by causing the indoor heat exchanger (11) to function as an evaporator. During a first time period, which is from the time information pertaining to the start of the cleaning operation is received until a prescribed amount of time has passed, the control device restricts the flow of refrigerant to the indoor heat exchanger (11) more than during the cleaning operation by controlling the refrigerant circuit (RC) or sets the evaporation temperature (Te) of the indoor heat exchanger (11) to be higher than during the cleaning operation, and then, after the first time period, performs the cleaning operation by controlling the refrigerant circuit (RC) and the humidified air supply device (3).

Description

Air conditioner

The present disclosure relates to an air conditioner.

BACKGROUND ART Conventionally, as an air conditioner, there is one that performs a cleaning operation in which the surface of an indoor heat exchanger is condensed and the surface of the indoor heat exchanger is cleaned with condensed water droplets (for example, Japanese Patent No. 6296633). )reference). In the above air conditioner, the indoor heat exchanger is made to function as an evaporator in the cleaning operation, and the evaporation temperature of the refrigerant in the indoor heat exchanger is set to be equal to or lower than the dew point temperature.

Japanese Patent No. 6296633

In the above air conditioner, since water droplets that condense on the indoor heat exchanger are generated from the water vapor contained in the indoor air, the amount of water droplets that cleans the surface of the indoor heat exchanger depends on the amount of water contained in the indoor air, There has been a problem that a sufficient amount of water for cleaning the exchanger cannot be obtained.

Therefore, in order to solve such a problem, by providing a humidified air supply device for supplying humidified air into the indoor unit, an air conditioner is proposed in which a sufficient amount of water for cleaning the indoor heat exchanger is obtained. ing.

However, in the air conditioner equipped with the humidified air supply device, when the cleaning operation is started after the heating operation or the cooling operation is completed, the indoor heat exchanger functions as an evaporator until the humidified air is supplied from the humidified air supply device. If so, there is a problem that the casing is too cold and dew condensation occurs on the casing itself.

The present disclosure proposes an air conditioner that can suppress the occurrence of dew condensation on the casing when cleaning the indoor heat exchanger.

The air conditioner of the present disclosure is
A compressor, an outdoor heat exchanger, a refrigerant circuit in which an expansion mechanism and an indoor heat exchanger are annularly connected,
An indoor unit having a casing in which the indoor heat exchanger is arranged in a wind passage, and an indoor fan arranged in the wind passage of the casing,
A humidified air supply device for supplying humidified air into the casing,
The indoor heat exchanger is controlled by controlling the refrigerant circuit and the humidified air supply device to supply humidified air from the humidified air supply device into the casing and cause the indoor heat exchanger to function as an evaporator. And a controller for performing a cleaning operation for cleaning,
The control device is
In the first period from the time of receiving the information about the start of the cleaning operation until a predetermined time elapses, the refrigerant circuit is controlled to regulate the flow rate of the refrigerant to the indoor heat exchanger more than during the cleaning operation, or , The evaporation temperature of the indoor heat exchanger is set higher than during the cleaning operation,
After the first period, the cleaning operation is performed by controlling the refrigerant circuit and the humidified air supply device.

According to the present disclosure, by controlling the refrigerant circuit by the control device, in the first period from the time when the information about the start of the cleaning operation is received (such as the end of the heating operation or the cooling operation) to the predetermined time, the indoor By restricting the flow rate of the refrigerant to the heat exchanger from that during the cleaning operation, or by setting the evaporation temperature of the indoor heat exchanger higher than that during the cleaning operation, the humidified air is supplied in the first period before the cleaning operation is started. The indoor heat exchanger can be prevented from functioning as an evaporator or the capacity of the evaporator can be suppressed until the humidified air is supplied from the supply device, and the casing does not become too cold. Therefore, when cleaning the indoor heat exchanger, it is possible to suppress the occurrence of dew condensation on the casing.

Further, in the air conditioner according to one aspect of the present disclosure,
The outlet of the casing is provided with a flap attached so as to be vertically tiltable,
The control device controls the tilting of the flap in the up-down direction so that the flap is positioned above the horizontal during the first period.

According to the present disclosure, by controlling the tilting of the flap in the vertical direction by the control device and making the flap upward from the horizontal during the first period, the blown air is directed to the ceiling side in the room, so that the indoor user The blown air can be prevented from hitting directly.

Further, in the air conditioner according to one aspect of the present disclosure,
The control device controls the indoor fan to drive the indoor fan at a predetermined rotation speed during the first period.

According to the present disclosure, by controlling the indoor fan by the control device and driving the indoor fan at a predetermined number of rotations during the first period, the sound of the humidification fan or the like transmitted from the humidified air supply device that has started operation in advance. Can be masked.

Further, in the air conditioner according to one aspect of the present disclosure,
During the cleaning operation, the control device controls the amount of refrigerant flowing through the indoor heat exchanger and the indoor temperature so that the temperature of the indoor heat exchanger that functions as the evaporator is higher than 0 ° C. and is equal to or lower than the dew point temperature. Controls the fan speed.

According to the present disclosure, during the cleaning operation, the control device controls the amount of refrigerant flowing into the indoor heat exchanger and the rotation speed of the indoor fan so that the temperature of the indoor heat exchanger functioning as an evaporator is higher than 0 ° C. By setting the temperature below the dew point temperature, the water vapor contained in the humidified air from the humidified air supply device becomes water drops without being frozen in the indoor heat exchanger.

Further, in the air conditioner according to one aspect of the present disclosure,
After the humidifying operation of supplying the humidified air to the indoor unit by the humidified air supply device, or by supplying the humidified air to the indoor unit by the humidified air supply device and causing the indoor heat exchanger to function as a condenser After the operation, the cleaning operation is performed without the first period.

According to the present disclosure, in the cleaning operation after the end of the humidifying operation of supplying the humidified air to the indoor unit by the humidified air supply device, the humidified air can be immediately supplied from the humidified air supply device, so that there is no first period. The cleaning operation can be started immediately and the time can be shortened. Similarly, the humidified air supply device supplies the humidified air to the indoor unit and the indoor heat exchanger functions as a condenser.In the washing operation after the end of the humidified heating operation, the humidified air supply device can immediately supply the humidified air. Therefore, the cleaning operation can be started immediately without the first period, and the time can be shortened.

It is an external view of the air conditioner of 1st Embodiment of this indication. It is a circuit diagram of the air conditioner. FIG. 3 is a schematic cross-sectional view of the indoor unit seen from the line III-III in FIG. 1. It is a control block diagram of the said air conditioner. It is a timing chart for explaining the operation of the cleaning operation of the air conditioner.

The embodiment will be described below. In the drawings, the same reference numerals represent the same or corresponding parts. Further, dimensions such as length, width, thickness, and depth on the drawing are appropriately changed from an actual scale for the sake of clarity and simplification of the drawing, and do not represent actual relative dimensions.

[First Embodiment]
FIG. 1 is an external view of an air conditioner according to a first embodiment of the present disclosure.

As shown in FIG. 1, the air conditioner of the first embodiment is a pair-type air conditioner including an indoor unit 1 and an outdoor unit 2 connected to the indoor unit 1 via refrigerant pipes L4 and L5. It is a machine. Further, in this air conditioner, the humidifying device 3 connected to the indoor unit 1 via the humidifying hose 4 is provided on the outdoor unit 2. The humidifying device 3 is an example of a humidified air supply device.

Further, FIG. 2 is a circuit diagram of the refrigerant circuit RC provided in the air conditioner.

<Structure of indoor unit 1>
The indoor unit 1 of the air conditioner is, for example, a wall-mounted indoor unit attached to a wall surface in the room. The indoor unit 1 includes a casing 10 (shown in FIG. 3), an indoor heat exchanger 11, and an indoor fan 12 that sends air to the indoor heat exchanger 11.

The indoor heat exchanger 11 is located upstream of the indoor fan 12 with respect to the air flow from the indoor fan 12. The indoor heat exchanger 11 has a main body heat exchange section 11a, an auxiliary heat exchange section 11b, and a solenoid valve 13 for exchanging heat between the air from the indoor fan 12 and the refrigerant.

The details of the main body heat exchange section 11a and the auxiliary heat exchange section 11b will be described below in the direction of the refrigerant flow in the cooling cycle.

The main body heat exchange section 11a is composed of a front section 11a-1 located on the indoor side and a rear section 11a-2 located on the opposite side to the indoor side. The front surface portion 11a-1 is fluidly connected to the rear surface portion 11a-2 via the refrigerant pipes L12 and L13 and the solenoid valve 13. As a result, the refrigerant flowing from the electric expansion valve 24 on the outdoor unit 2 side to the main body heat exchange section 11a can flow into the rear surface section 11a-2 after flowing through the front surface section 11a-1.

The auxiliary heat exchange section 11b is provided on the side opposite to the back surface section 11a-2 side of the main body heat exchange section 11a with respect to the front section 11a-1 of the main body heat exchange section 11a. That is, the auxiliary heat exchange section 11b is located on the indoor side of the front surface section 11a-1 of the main body heat exchange section 11a. The volume of the auxiliary heat exchange section 11b is smaller than that of the main body heat exchange section 11a. The refrigerant pipe L4 is connected to one end of the auxiliary heat exchange part 11b, and the front face part 11a-1 of the main body heat exchange part 11a is connected to the other end of the auxiliary heat exchange part 11b via the refrigerant pipe L11. As a result, the refrigerant from the electric expansion valve 24 side of the outdoor unit 2 side is supplied to the main body heat exchange section 11a via the auxiliary heat exchange section 11b.

As the indoor fan 12, for example, a cross flow fan is adopted. This cross flow fan blows out the air whose temperature has been adjusted by the indoor heat exchanger 11 toward the room.

The solenoid valve 13 is provided in the middle part of the refrigerant path of the indoor heat exchanger 11. More specifically, it is a valve for setting a differential pressure between the front surface portion 11a-1 side of the main body heat exchange portion 11a and the rear surface portion 11a-2 side of the main body heat exchange portion 11a. The solenoid valve 13 is an on / off valve that can take only two positions, a large opening and a small opening, is turned on when necessary (for example, during reheat dehumidification operation described later), and opens from the large opening position to a small opening. Switch to degree position.

<Structure of outdoor unit 2>
The outdoor unit 2 of the air conditioner includes a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an electric expansion valve 24 as an example of an expansion mechanism, an accumulator 25, and an outdoor heat exchanger 23. And an outdoor fan 20 for sending air to.

The outdoor heat exchanger 23 is located downstream of the outdoor fan 20 with respect to the air flow from the outdoor fan 20. The refrigerant flowing in the outdoor heat exchanger 23 exchanges heat with the air from the outdoor fan 20.

The expansion valve 24 is, for example, a motor-operated valve that can be adjusted to three or more different opening degrees, and the opening degree changes according to a signal from the control device 100 (shown in FIG. 4).

<Humidifier 3>
As shown in FIG. 2, the humidifying device 3 includes a disk-shaped humidifying rotor 41 having an adsorption area and a desorption area, a humidifying rotor drive motor 42, a heater 43, a damper 44, and a humidifying fan 45. The outdoor unit-side humidifying duct 46 to which the humidifying hose 4 is connected.

The humidifying rotor 41 is made of an adsorbent such as silica gel, zeolite, or alumina, which is formed in a honeycomb shape or a porous multi-granular shape. The humidifying rotor 41 is rotatably provided by a humidifying rotor drive motor 42.

Further, inside the humidifying device 3, first and second air paths P1 and P2 for supplying humidified air are provided.

The first air path P1 is arranged so that the air sucked into the humidification device 3 by the outdoor fan 20 passes through the adsorption area of the humidification rotor 41 and is discharged to the outside. In the first air path P1, the sucked air adsorbs moisture when passing through the adsorption area of the humidification rotor 41, and is exhausted to the outside in a dry state.

In the second air path P2, the air sucked into the humidifying device 3 by the humidifying fan 45 is heated by the heater 43, passes through the desorption region of the humidifying rotor 41, and passes through the outdoor unit side humidifying duct 46. It is arranged so as to be supplied to the indoor unit 1. In the second air path P2, when the air sucked into the humidifying device 3 passes through the desorption area of the humidification rotor 41, the humidity thereof is increased by the moisture absorbed in the adsorption area, and the air is humidified. It is supplied to the indoor unit 1.

<Structure of Refrigerant Circuit RC>
The refrigerant circuit RC of the air conditioner includes an indoor heat exchanger 11, a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an electric expansion valve 24, an accumulator 25, and refrigerant pipes L1 to L7. There is. More specifically, the indoor heat exchanger 11, the compressor 21, the four-way switching valve 22, the outdoor heat exchanger 23, the electric expansion valve 24, and the accumulator 25 are fluidly connected by the refrigerant pipes L1 to L7. Thereby, the annular refrigerant circuit RC is configured. In such a refrigerant circuit RC, the refrigerant is circulated by driving the compressor 21.

Also, although not shown, the air conditioner includes a remote controller (hereinafter referred to as “remote control”). The user can operate the remote controller to start or stop automatic operation, cooling operation, heating operation, dehumidifying operation, and the like.

Also, FIG. 3 is a schematic cross-sectional view of the indoor unit 1 taken along the line III-III in FIG.

As shown in FIG. 3, the indoor unit 1 has an indoor heat exchanger 11 arranged in the air passage Pw of the casing 10. Further, the indoor fan 12 is arranged in the air passage Pw of the casing 10 and on the downstream side of the indoor heat exchanger 11. In addition, a horizontal flap 31 that is tiltable in the vertical direction is provided at the air outlet 1a of the wind passage Pw of the casing 10. The horizontal flap 31 is an example of a flap. Further, the air passage Pw of the casing 10 is an air flow passage indicated by a thick solid line arrow shown in FIG.

An indoor unit-side humidification duct 51 and a diffusion duct 52, to which the humidification hose 4 (shown in FIG. 2) is connected, are arranged in the wind passage Pw of the casing 10 and on the upstream side of the indoor heat exchanger 11. The diffusion duct 52 is connected to the indoor unit humidification duct 51 and extends in the left-right direction inside the casing 10 (see FIG. 1). On the rear wall of the diffusion duct 52, a plurality of humidification outlets (not shown) are formed side by side in the left-right direction. The humidified air that has flowed into the diffusion duct 52 from the indoor unit-side humidifying duct 51 blows out toward the indoor heat exchanger 11 side from the plurality of humidifying outlets.

FIG. 4 is a control block diagram of the air conditioner.

As shown in FIG. 4, the indoor unit 1 has an indoor heat exchanger temperature sensor T4 that detects the temperature of the indoor heat exchanger 11, and an indoor temperature that detects the temperature of the room in which the indoor unit 1 is installed. A sensor T5 and a humidity sensor H that detects the humidity in the room where the indoor unit 1 is installed are provided.

As shown in FIG. 4, the outdoor unit 2 includes an outdoor heat exchanger temperature sensor T1 that detects the temperature of the outdoor heat exchanger 23, an outdoor air temperature sensor T2 that detects the outdoor air temperature, and an electric expansion valve 24. An evaporation temperature sensor T3 for detecting the evaporation temperature is provided.

Further, as shown in FIG. 4, the air conditioner has a control device 100 for controlling the indoor unit 1 and the outdoor unit 2, and a remote controller (not shown).

The control device 100 is composed of an indoor control unit (not shown) on the indoor unit 1 side and an outdoor control unit (not shown) on the outdoor unit 2 side, each of which performs CPU (Central Processing Unit): Processor), ROM (Read Only Memory: Read Only Memory) and RAM (Random Access Memory: Random Access Memory) for storing programs and data necessary for controlling indoor unit 1 and outdoor unit 2 Etc. are provided. The control device 100 includes a remote controller or sensors of the indoor unit 1 and the outdoor unit 2 (an outdoor heat exchanger temperature sensor T1, an outdoor air temperature sensor T2, an evaporation temperature sensor T3, an indoor heat exchanger temperature sensor T4, an indoor temperature sensor). T5 and a signal from the humidity sensor H), etc., and the compressor 21, the four-way switching valve 22, the electric expansion valve 24, the outdoor fan 20, the indoor fan 12, the solenoid valve 13, the display unit 30, for the horizontal flap. The drive motor 32, the humidification rotor drive motor 42, the heater 43, the damper 44, and the humidification fan 45 are controlled.

The remote control can change the control contents of the indoor unit 1 and the outdoor unit 2 by the control device 100. For example, by operating the remote control, selection of each operation mode of heating operation, cooling operation and dehumidification operation, operation start, operation switching, operation stop, setting or changing the room temperature or air volume, cleaning The operation can be started and stopped.

FIG. 5 is a timing chart for explaining the operation of the cleaning operation. In this cleaning operation, the information regarding the start of the cleaning operation is, for example, the end of the heating operation. Note that the control device 100 receives the information regarding the start of the cleaning operation when the cleaning operation is started by the remote controller or the cleaning operation is executed after the end of the air conditioning operation such as the heating operation or the cooling operation by the user's remote control operation. Is set and the air conditioning operation ends.

In FIG. 5, it is assumed that it is set by the operation of the remote control to execute the cleaning operation after the end of the air conditioning operation such as the heating operation or the cooling operation.

First, when the heating operation is stopped, the compressor 21 is stopped without operating in the preparation period (first period) until a predetermined time T (20 minutes in this embodiment) elapses, and the refrigerant flows in the refrigerant circuit RC. The flow rate of the refrigerant to the indoor heat exchanger 11 is regulated so that it does not exist.

Also, start the operation of the humidifier 3 at the start of the above preparation period. Specifically, the control device 100 controls the humidifying rotor drive motor 42, the heater 43, and the humidifying fan 45 to rotate the humidifying rotor 41 of the humidifying device 3 and turn on the heater 43 and the humidifying fan 45 to supply humidified air. Preparation is made to supply the indoor unit 1 via the humidifying hose 4.

Also, the indoor fan 12 is driven at a predetermined rotation speed during the preparation period and the cleaning operation. The predetermined rotation speed of the indoor fan 12 is set to a rotation speed capable of masking the sound of the humidifying fan transmitted from the humidifying device 3.

Also, during the above-mentioned preparation period and the cleaning operation, the horizontal flap 31 is opened to a predetermined opening so that the air direction of the blown air of the horizontal flap 31 is above the horizontal direction.

Then, when the preparation period ends and the cleaning operation is started, the operation of the compressor 21 is started and the indoor heat exchanger 11 is made to function as an evaporator in the cooling cycle. When the temperature of the indoor heat exchanger 11 is higher than 0 ° C. and is equal to or lower than the dew point temperature, water droplets start to attach to the indoor heat exchanger 11.

In the air conditioner having the above-described configuration, the control unit 100 controls the refrigerant circuit RC to prepare for a predetermined time T (20 minutes in this embodiment) from the time when the information about the start of the cleaning operation is received (second time). During one period), the flow rate of the refrigerant to the indoor heat exchanger 11 is regulated. In this preparatory period, the controller 100 controls the humidifying rotor drive motor 42, the heater 43, and the humidifying fan 45 to rotate the humidifying rotor 41 of the humidifying device 3 and turn on the heater 43 and the humidifying fan 45 to humidify the humidifier. Preparation is made to supply air to the indoor unit 1 via the humidifying hose 4.
During the preparation period, the humidifying rotor 41 of the humidifying device 3 is rotated, and only the adsorption operation for adsorbing the moisture in the adsorption region of the humidifying rotor 41 is performed to actually introduce the humidified air from the humidifying device 3 into the indoor unit 1. It may be performed even after the cleaning operation is started.

Thus, when the cleaning operation is started after the heating operation or the cooling operation is finished, the indoor heat exchanger 11 is prevented from functioning as an evaporator until the humidified air is substantially supplied from the humidifying device 3 (humidified air supply device). Therefore, the casing 10 does not become too cold. Therefore, when cleaning the indoor heat exchanger 11, dew condensation on the casing 10 can be suppressed.

Further, by controlling the tilting of the horizontal flap 31 (flap) in the up-down direction by the control device 100 so that the horizontal flap 31 faces upward from the horizontal during the preparation period, the blown air is directed to the ceiling side in the room. , It is possible to prevent blown air from directly hitting indoor users.

Further, by controlling the indoor fan 12 by the control device 100 and driving the indoor fan 12 at a predetermined rotation speed during the preparation period, the humidifying hose 4 and the indoor unit 1 are started from the humidifying device 3 which has started in advance. It is possible to mask the sound of the humidifying fan transmitted through the room via the.

Further, during the cleaning operation, the control device 100 controls the amount of refrigerant flowing into the indoor heat exchanger 11 and the rotation speed of the indoor fan 12 so that the temperature of the indoor heat exchanger 11 functioning as an evaporator is higher than 0 ° C. By setting the temperature below the dew-point temperature, the indoor heat exchanger 11 can be prevented from freezing, and the water vapor contained in the humidified air from the humidifying device 3 can be turned into water droplets in the indoor heat exchanger 11 to cause dew condensation.

[Second Embodiment]
The air conditioner of the second embodiment of the present disclosure has the same configuration as the air conditioner of the first embodiment except the operation of the control device 100, and FIGS. 1 to 4 are incorporated.

In the air conditioner of the second embodiment, the control device 100 humidifies the indoor unit 1 after the humidifying operation of supplying humidified air to the indoor unit 1 by the humidifying device 3 (humidified air supply device). After the humidifying and heating operation in which air is supplied and the indoor heat exchanger 11 functions as a condenser, the cleaning operation is executed without a preparation period.

According to the air conditioner configured as described above, in the cleaning operation after the end of the humidifying operation of supplying the humidified air to the indoor unit 1 by the humidifier 3, the humidified air can be immediately supplied from the humidifier 3, so that the preparation period The cleaning operation can be started immediately without the use, and the time can be shortened.

Similarly, in the cleaning operation after the end of the humidification heating operation in which the humidification device 3 supplies the humidified air to the indoor unit 1 and the indoor heat exchanger 11 functions as a condenser, the humidification device 3 can immediately supply the humidified air. Therefore, the cleaning operation can be started immediately without the preparation period, and the time can be shortened.

The air conditioner of the second embodiment has the same effect as the air conditioner of the first embodiment.

[Third Embodiment]
The air conditioner of the third embodiment of the present disclosure has the same configuration as the air conditioner of the first embodiment except for the operation of the control device 100, and FIGS. 1 to 4 are incorporated.

In the air conditioner of the first embodiment, when the air conditioning operation such as the heating operation or the cooling operation is stopped, the compressor 21 is stopped without operating in the preparation period (first period), and the refrigerant flows into the refrigerant circuit RC. On the contrary, in the air conditioner of the third embodiment, in the preparation period (first period), the compressor 21 is operated to cause the indoor heat exchanger 11 to function as an evaporator in the cooling cycle. .. At this time, the indoor heat exchanger temperature sensor T4 detects the refrigerant flow rate to the indoor heat exchanger 11 by controlling the flow rate of the refrigerant to the indoor heat exchanger 11 such that a smaller amount of the refrigerant flows to the indoor heat exchanger 11 than in the next cleaning operation. The evaporation temperature Te of the indoor heat exchanger 11 is set higher than that during the cleaning operation.

In the preparatory period (first period) before starting the cleaning operation, it is possible to suppress the capacity of the indoor heat exchanger 11 as the evaporator until the humidifying air is supplied from the humidifying device 3 (humidified air supply device), The casing 10 does not get too cold. Therefore, when cleaning the indoor heat exchanger 11, dew condensation on the casing 10 can be suppressed.

The air conditioner of the third embodiment has the same effect as the air conditioner of the first embodiment.

In the first to third embodiments, the air conditioner including the humidifying device 3 which is a humidified air supplying device has been described. It may be a humidified air supply device to which humidifying water is supplied.

Although specific embodiments of the present disclosure have been described, the present disclosure is not limited to the above to the third embodiments, and various modifications can be implemented within the scope of the present disclosure.

DESCRIPTION OF SYMBOLS 1 ... Indoor unit 2 ... Outdoor unit 3 ... Humidification device 4 ... Humidification hose 10 ... Casing 11 ... Indoor heat exchanger 11a ... Main body heat exchange part 11a-1 ... Front part 11a-2 ... Back part 11b ... Auxiliary heat exchange part 12 ... Indoor fan 13 ... Solenoid valve 20 ... Outdoor fan 21 ... Compressor 22 ... Four-way switching valve 23 ... Outdoor heat exchanger 24 ... Electric expansion valve (expansion mechanism)
25 ... Accumulator 31 ... Horizontal flap 32 ... Horizontal flap drive motor 41 ... Humidification rotor 42 ... Humidification rotor drive motor 43 ... Heater 44 ... Damper 45 ... Humidification fan 46 ... Outdoor unit side humidification duct RC ... Refrigerant circuit

Claims

A refrigerant circuit (RC) in which a compressor (21), an outdoor heat exchanger (23), an expansion mechanism (24) and an indoor heat exchanger (11) are annularly connected,
The indoor heat exchanger (11) has a casing (10) arranged in the air passage (Pw) and an indoor fan (12) arranged in the air passage (Pw) of the casing (10). Indoor unit (1),
A humidified air supply device (3) for supplying humidified air into the casing (10);
By controlling the refrigerant circuit (RC) and the humidified air supply device (3), humidified air is supplied from the humidified air supply device (3) into the casing (10) and the indoor heat exchanger (11). ) As an evaporator, and a controller (100) for performing a cleaning operation for cleaning the indoor heat exchanger (11),
The control device (100) is
During the first period from the time when the information about the start of the cleaning operation is received until a predetermined time elapses, the refrigerant circuit (RC) is controlled to change the refrigerant flow rate to the indoor heat exchanger (11) during the cleaning operation. Or the evaporation temperature (Te) of the indoor heat exchanger (11) is set higher than that during the cleaning operation,
An air conditioner characterized by performing the cleaning operation by controlling the refrigerant circuit (RC) and the humidified air supply device (3) after the first period.
The air conditioner according to claim 1,
The outlet (1a) of the casing (10) is provided with a flap (31) attached so as to be vertically tiltable,
The air conditioner characterized in that the control device (100) controls tilting of the flap (31) in a vertical direction so that the flap (31) faces upward from horizontal during the first period.
The air conditioner according to claim 2,
The controller (100) controls the indoor fan (12) to drive the indoor fan (12) at a predetermined rotation speed during the first period.
The air conditioner according to any one of claims 1 to 3,
During the cleaning operation, the control device (100) controls the indoor heat exchanger (11) so that the temperature of the indoor heat exchanger (11) functioning as the evaporator is higher than 0 ° C. and equal to or lower than the dew point temperature. An air conditioner characterized by controlling the amount of refrigerant flowing in (11) and the rotation speed of the indoor fan (12).
The air conditioner according to any one of claims 1 to 4,
After the humidifying operation of supplying humidified air to the indoor unit (1) by the humidified air supply device (3), or by supplying humidified air to the indoor unit (1) by the humidified air supply device (3) and An air conditioner characterized by performing the cleaning operation without the first period after a humidifying and heating operation in which the indoor heat exchanger (11) functions as a condenser.