TW201947127A - air conditioner - Google Patents

Abstract

Provided is an air conditioner in which a fan and a heat exchanger are purified. The air conditioner is provided with an indoor heat exchanger (15), an indoor fan (16), a fan cleaning part (24) that cleans the indoor fan (16), and a control unit that controls at least the indoor fan (16) and the fan cleaning part (24). After cleaning of the indoor fan (26) by the fan cleaning unit (24), the control unit causes the indoor heat exchanger (15) to function as an evaporator, and causes the indoor heat exchanger (15) to carry out freezing or condensation.

Description

air conditioner

The present invention relates to an air conditioner.

As a technique for cleaning an indoor fan of an air conditioner, for example, Patent Document 1 describes a person having a “fan cleaning device for removing dust from the fan”.

[Prior technical literature]
[Patent Literature]

[Patent Document 1] Patent Publication No. 4046755

[Questions to be Solved by the Invention]

In Patent Document 1, as described above, a configuration for cleaning an indoor fan (fan) is described, but a configuration for cleaning an indoor heat exchanger (heat exchanger) is not described. That is, although it is desirable to make both an indoor fan and an indoor heat exchanger clean, such a structure is not described in patent document 1.

An object of the present invention is to provide an air conditioner for cleaning a fan and a heat exchanger.

[Means for solving problems]

In order to solve the aforementioned problems, the air conditioner according to the present invention includes a heat exchanger: a dew-receiving tray disposed below the heat exchanger; a fan; and a fan cleaning section higher than the dew-receiving tray Is located between the heat exchanger and the fan to clean the fan; and a control unit that controls at least the fan and the fan cleaning unit; the control unit is located in the fan caused by the fan cleaning unit After cleaning, the heat exchanger functions as an evaporator, and the heat exchanger freezes or dew.

[Inventive effect]

According to the present invention, it is possible to provide an air conditioner for cleaning a fan and a heat exchanger.

≪First Embodiment≫
<Configuration of Air Conditioner>
FIG. 1 is a configuration diagram of an air conditioner 100 according to the first embodiment.
The solid arrows in FIG. 1 indicate the flow of the refrigerant during the operation of the greenhouse.
On the other hand, the dotted arrows in FIG. 1 indicate the flow of the refrigerant during the cooling room operation.
In addition, in FIG. 1, illustration of the fan cleaning part 24 (refer FIG. 2), the control part 30 (refer FIG. 4) etc. which are mentioned later are abbreviate | omitted.

The air conditioner 100 is a device for performing air conditioning such as warm room operation or cold room operation. As shown in FIG. 1, the air conditioner 100 includes a compressor 11, an outdoor heat exchanger 12, an outdoor fan 13, and an expansion valve 14. The air conditioner 100 includes an indoor heat exchanger 15 (heat exchanger), an indoor fan 16 (fan), and a four-way valve 17 in addition to the aforementioned configuration.

The compressor 11 is a device that compresses a low-temperature and low-pressure gas refrigerant and discharges a high-temperature and high-pressure gas refrigerant. The compressor 11 includes a compressor motor 11a as a drive source.
The outdoor heat exchanger 12 is a heat exchanger that performs heat exchange between a refrigerant flowing through a heat transfer tube (not shown) and external air sent from the outdoor fan 13.

The outdoor fan 13 is a fan that sends outside air to the outdoor heat exchanger 12. The outdoor fan 13 includes a driving source, that is, an outdoor fan motor 13 a, and is disposed near the outdoor heat exchanger 12.
The expansion valve 14 is a valve that decompresses the refrigerant condensed by the "condenser" (one of the outdoor heat exchanger 12 and the indoor heat exchanger 15). In addition, the refrigerant decompressed by the expansion valve 14 is guided to the "evaporator" (the other of the outdoor heat exchanger 12 and the indoor heat exchanger 15).

The indoor heat exchanger 15 is a heat exchanger that performs heat exchange between the refrigerant flowing through the heat transfer tube g (see FIG. 2) and the indoor air (air in the air-conditioned space) sent by the indoor fan 16.
The indoor fan 16 is a fan that sends indoor air to the indoor heat exchanger 15. The indoor fan 16 has a driving source, that is, an indoor fan motor 16 c (see FIG. 4), and is arranged near the indoor heat exchanger 15.

The four-way valve 17 is a valve that switches the flow path of the refrigerant in accordance with the operation mode of the air conditioner 100. For example, during cold room operation (see the dotted arrow in FIG. 1), the compressor 11, the outdoor heat exchanger 12 (condenser), the expansion valve 14, and the indoor heat exchanger 15 are sequentially connected through a four-way valve 17. In the refrigerant circuit Q formed by the (evaporator), the refrigerant is circulated in a refrigeration cycle.

On the other hand, during the operation of the greenhouse (see the solid arrow in FIG. 1), the compressor 11, the indoor heat exchanger 15 (condenser), the expansion valve 14, and the outdoor heat exchange are connected in sequence through the four-way valve 17. In the refrigerant circuit Q formed by the evaporator 12 (evaporator), the refrigerant is circulated in a refrigeration cycle.

That is, in the refrigerant circuit Q that circulates the refrigerant through the compressor 11, the "condenser", the expansion valve 14, and the "evaporator" in sequence, one of the "condenser" and "evaporator" described above It is an outdoor heat exchanger 12 and the other is an indoor heat exchanger 15.

In the example shown in FIG. 1, the compressor 11, the outdoor heat exchanger 12, the outdoor fan 13, the expansion valve 14, and the four-way valve 17 are installed in the outdoor unit Uo. On the other hand, the indoor heat exchanger 15 and the indoor fan 16 are installed in the indoor unit Ui.

FIG. 2 is a longitudinal sectional view of the indoor unit Ui.
FIG. 2 illustrates a state where the indoor fan 16 by the fan cleaning unit 24 has not been cleaned.
The indoor unit Ui includes, in addition to the indoor heat exchanger 15 or the indoor fan 16 described above, a dew-receiving pan 18, a frame base 19, filters 20a, 20b, a front panel 21, left and right wind direction panels 22, The up-and-down wind direction board 23 and the fan cleaning part 24.

The indoor heat exchanger 15 includes a plurality of fins f and a plurality of heat transfer tubes g passing through the fins f. Furthermore, from another viewpoint, the indoor heat exchanger 15 includes a front indoor heat exchanger 15 a disposed on the front side of the indoor fan 16 and a rear indoor heat exchanger 15 b disposed on the rear side of the indoor fan 16. As shown in FIG. 2, the upper end portion of the front indoor heat exchanger 15 a and the upper end portion of the rear indoor heat exchanger 15 b are connected in an inverted V shape.

The indoor fan 16 is, for example, a drum-shaped cross-flow fan, and is arranged near the indoor heat exchanger 15. The indoor fan 16 includes a plurality of fan blades 16a, a partition plate 16b on which the fan blades 16a are provided, and an indoor fan motor 16c as a drive source (see FIG. 4).

The dew-receiving pan 18 is a person who receives the condensate from the indoor heat exchanger 15 and is arranged below the indoor heat exchanger 15 (in the example shown in FIG. 2, the front-side indoor heat exchanger 15 a).
The housing base 19 is a housing in which equipment such as an indoor heat exchanger 15 or an indoor fan 16 is installed.

The filters 20 a and 20 b collect dust from the air that is directed to the indoor heat exchanger 15 as the indoor fan 16 is driven. One of the filters 20 a is disposed on the front side of the indoor heat exchanger 15, and the other of the filters 20 b is disposed on the upper side of the indoor heat exchanger 15.
The front panel 21 is a panel provided to cover the filter 20a on the front side, and the lower end is a shaft that can be rotated to the front side. In addition, it is good also as a structure which the front surface panel 21 does not rotate.

The left and right wind direction plates 22 are plate-like members that adjust the flow of the air blown into the room in the left-right direction as the indoor fan 16 rotates. The left and right wind direction plates 22 are arranged in the blowout air path h3, and are rotated in the left and right directions by the left and right wind direction plate motors 25 (see FIG. 4).

The up-and-down wind direction plate 23 is a plate-like member that adjusts the vertical flow of the air blown into the room as the indoor fan 16 rotates. The up-and-down wind direction board 23 is arrange | positioned in the vicinity of the air blow-out port h4, and is rotated in the up-down direction by the up-and-down wind direction board motor 26 (refer FIG. 4).

The air sucked in through the air inlets h1 and h2 performs heat exchange with the refrigerant flowing through the heat transfer tube g of the indoor heat exchanger 15, and the heat-exchanged air is guided to the blow-out air path h3. The air flowing through the blow-out air path h3 is guided to a specific direction by the left and right wind direction plates 22 and the up-and-down wind direction plates 23, and further, the air is blown out into the room through the air blowing outlet h4.

In addition, most of the dust that has reached the air intake ports h1 and h2 as the air flows is captured by the filters 20a and 20b. However, there are cases where fine dust passes through the filters 20 a and 20 b and adheres to the indoor heat exchanger 15 or the indoor fan 16. Therefore, it is desirable to regularly clean the indoor heat exchanger 15 or the indoor fan 16. Here, in this embodiment, the indoor heat exchanger 15 is cleaned after the indoor fan 16 caused by the fan cleaning unit 24 is cleaned.

The fan cleaning unit 24 shown in FIG. 2 is for cleaning the indoor fan 16 and is disposed between the indoor heat exchanger 15 and the indoor fan 16. To explain in more detail, the fan cleaning unit 24 is disposed in the recessed portion r of the indoor heat exchanger 15a on the side before the vertical cross-sectional view becomes <character-shaped.

FIG. 3 is a perspective view in which a part of the indoor unit Ui is cut out.
The fan cleaning unit 24 includes a fan cleaning motor 24c in addition to the shaft portion 24a and the brush 24b shown in FIG. 3 (see FIG. 4). The shaft portion 24 a is a rod-shaped member that is parallel to the axial direction of the indoor fan 16 and is supported by the shaft in the vicinity of both ends.

The brush 24b removes dust adhering to the fan blade 16a, and is provided in the shaft part 24a. The fan cleaning motor 24c (see FIG. 4) is, for example, a stepping motor, and has a function of rotating the shaft portion 24a by a specific angle.

When cleaning the indoor fan 16, the shaft portion 24a and the brush 24b are rotated to allow the brush 24b to contact the indoor fan 16, and then the indoor fan 16 is reversely rotated (see FIG. 6A). Then, when the cleaning of the indoor fan 16 is completed, the shaft portion 24a and the brush 24b are rotated to separate the brush 24b from the indoor fan 16 (see FIG. 2).

In addition, in a state where the fan cleaning unit 24 is separated from the indoor fan 16, as shown in FIG. 2, the vicinity of the end of the brush 24b is ideally in contact with the indoor heat exchanger 15. By cleaning the indoor heat exchanger 15 described later, the indoor heat exchanger 15 also removes dust from the brush 24b.

FIG. 4 is a functional block diagram of the air conditioner 100.
The indoor unit Ui shown in FIG. 4 includes a remote control transceiver unit 27 and an indoor control circuit 31 in addition to the aforementioned configuration.
The remote control transceiver unit 27 exchanges specific information between the remote controls 40 through infrared communication or the like.

The indoor control circuit 31 is an electronic circuit including various interfaces such as a CPU (Central Processing Unit), ROM (Read Only Memory), and RAM (Random Access Memory), although not shown in the figure. Then, the program stored in the ROM is read and developed into the RAM, and the CPU executes various processes.

As shown in FIG. 4, the indoor control circuit 31 includes a memory unit 31 a and an indoor control unit 31 b.
In addition to a specific program, the memory unit 31a also stores data received through the remote control transceiver unit 27, or detection values of various sensors (not shown).
The indoor control unit 31b controls the fan cleaning motor 24c, the indoor fan motor 16c, the left and right wind direction board motors 25, the up and down wind direction board motors 26, and the like based on the data stored in the memory unit 31a.

The outdoor unit Uo includes an outdoor control circuit 32 in addition to the aforementioned configuration. Although not shown in the figure, the outdoor control circuit 32 constitutes an electronic circuit including various interfaces such as a CPU, ROM, and RAM, and is connected to the indoor control circuit 31 through a communication line. As shown in FIG. 4, the outdoor control circuit 32 includes a memory section 32 a and an outdoor control section 32 b.

In the memory unit 32a, in addition to a specific program, data and the like received from the indoor control circuit 31 are stored. The outdoor control unit 32b controls the compressor motor 11a, the outdoor fan motor 13a, the expansion valve 14, and the like based on the data stored in the storage unit 32a. Hereinafter, the indoor control circuit 31 and the outdoor control circuit 32 are collectively referred to as a "control unit 30".

FIG. 5 is a flowchart of processing executed by the control unit 30.
Moreover, in the "start" fashion of FIG. 5, the air conditioning operation is not performed, and the end of the brush 24b faces the front side indoor heat exchanger 15a (the state shown in FIG. 2).

In step S101 in FIG. 5, the control unit 30 cleans the indoor fan 16 by the fan cleaning unit 24. In addition, as a cause of starting the cleaning of the indoor fan 16, for example, a condition that the accumulated time from the air-conditioning operation at the time of the previous cleaning reaches a specific time is exemplified.

FIG. 6A is an explanatory diagram showing a state during cleaning of the indoor fan 16.
In addition, in FIG. 6A, the indoor heat exchanger 15, the indoor fan 16, and the dew-receiving tray 18 are shown, and the other structures are not shown in figure.
When cleaning the indoor fan 16, the control unit 30 rotates the brush 24 b around the shaft portion 24 a so that the end of the brush 24 b faces the indoor fan 16. Thereby, the brush 24b contacts the fan blade 16a of the indoor fan 16. Next, the control unit 30 rotates the indoor fan 16 in a direction opposite to that during normal air-conditioning operation.

When the indoor fan 16 is rotated in the reverse direction as described above, the brush 24b is flexed in accordance with the movement of the fan blade 16a, and the pressure brush 24b strokes the back surface of the fan blade 16a. Then, the dust adhering to the fan blade 16a is wiped off with the brush 24b.

As shown in FIG. 6A, the dust j swept from the indoor fan 16 is guided to the dew-receiving tray 18 through a gap between the front-side indoor heat exchanger 15 a and the indoor fan 16. This can prevent dust j from being blown out into the room in the next air-conditioning operation.
In addition, it is also possible that part of the dust j swept from the indoor fan 16 does not fall onto the dew-receiving tray 18 and attaches to the front-side indoor heat exchanger 15a. The dust j adhering to the front-side indoor heat exchanger 15a is washed away by the water thawed with the indoor heat exchanger 15 in step S102 described later.

After the process of step S101 is completed, although the control unit 30 is omitted in FIG. 5, the fan cleaning unit 24 is moved and the brush 24 b is separated from the indoor fan 16. That is, the control unit 30 rotates the brush 24b around the shaft portion 24a so that the end of the brush 24b faces the indoor heat exchanger 15 (see FIG. 6B). Thereby, the noise when the fan 16 is driven indoors can be suppressed after that.

In step S102, the control unit 30 sequentially freezes and thaws the indoor heat exchanger 15. First, the control unit 30 causes the indoor heat exchanger 15 to function as an evaporator after cleaning the indoor fan 16 caused by the fan cleaning unit 24, and freezes the indoor heat exchanger 15.

For example, the control unit 30 opens the expansion valve 14 (see FIG. 1) so that the opening degree of the expansion valve 14 (see FIG. 1) is small during operation, and causes the refrigerant having a low evaporation temperature to flow into the indoor heat exchanger 15 at a low pressure. This makes it easy for the moisture in the air to frost in the indoor heat exchanger 15, and the frost or ice (element symbol i shown in FIG. 6B) easily grows. Therefore, in the subsequent thawing, the indoor heat exchanger 15 can be washed with a large amount of water.

In addition, the duration of cleaning of the indoor fan 16 caused by the fan cleaning unit 24 is longer than the freezing duration of the indoor heat exchanger 15 (the time from the start of the compressor 11 to the stop for the freezing) Shorter is better. Thereby, the duration of freezing of the indoor heat exchanger 15 is sufficiently ensured, and a large amount of frost or ice can be adhered to the indoor heat exchanger 15. Furthermore, during cleaning of the indoor fan 16, the control unit 30 does not unnecessarily drive the indoor fan motor 16c (see FIG. 4) for a long time, so that the abrasion of the brush 24b can be suppressed.

After the indoor heat exchanger 15 is frozen in this way (S102 in FIG. 5), the control unit 30 defrosts the indoor heat exchanger 15 (S102). For example, when the indoor heat exchanger 15 is defrosted, the control unit 30 defrosts the indoor heat exchanger 15 to stop the equipment (the compressor 11 and the like) including the indoor fan 16. Thereby, the indoor heat exchanger 15 is naturally thawed at room temperature. As described above, because the indoor fan 16 is in a stopped state, there is no danger that the water droplets thawed with the indoor fan 16 will fly out into the room together with the air.

FIG. 6B is an explanatory diagram showing a state during thawing of the indoor heat exchanger 15.
In a manner of thawing the indoor heat exchanger 15, the frost or ice of the indoor heat exchanger 15 is melted, and a large amount of water w flows along the fins f and falls to the dew receiving tray 18. Thereby, the dust j adhering to the indoor heat exchanger 15 during the air-conditioning operation can be washed away. In addition, the brushes 24b in a state in contact with the indoor heat exchanger 15 are also cleaned together.

Furthermore, as the indoor fan 16 is cleaned, the dust j adhering to the front-side indoor heat exchanger 15a is also washed away, and flows onto the dew-receiving tray 18 (see the arrow in FIG. 6B). The water w flowing into the dew-receiving tray 18 in this way is discharged to the outside through the drain hose (not shown) together with the dust j.

Although omitted in FIG. 5, after freezing and thawing of the indoor heat exchanger 15 (S102), the interior of the indoor unit Ui may be dried by the control unit 30 performing a greenhouse operation or a ventilation operation. This makes it possible to suppress the proliferation of bacteria such as the indoor heat exchanger 15.

＜ Effects ＞
According to this embodiment, after the indoor fan 16 is cleaned by the fan cleaning unit 24 (S101 of FIG. 5), the indoor heat exchanger 15 is frozen and thawed (S102). Thereby, both the indoor fan 16 and the indoor heat exchanger 15 are in a clean state. Therefore, it is possible to reduce the labor and maintenance cost of the user required for cleaning the indoor heat exchanger 15 or the indoor fan 16 compared with the conventional method.

In addition, if the cleaning of the indoor fan 16 (S101 in FIG. 5) and the order of freezing and thawing of the indoor heat exchanger 15 (S102) are reversed, the following situation will be obtained. That is, as the indoor heat exchanger 15 freezes, the interior of the indoor unit Ui is rapidly cooled, and water vapor contained in the air condenses, and moisture adheres to the surface of the indoor fan 16. When the indoor fan 16 is cleaned afterwards, the moisture on the surface of the indoor fan 16 is mixed with the dust by the brush 24b, and it becomes difficult for the dust to fall. As a result, the dust of the indoor fan 16 becomes difficult to be removed by the brush 24b, and there is a possibility that the dust may remain on the indoor fan 16 due to the state where the dust is tightly adhered to each other.

On the other hand, according to this embodiment, as described above, the indoor fan 16 is cleaned before freezing and thawing of the indoor heat exchanger 15 (FIG. 5: S102) (S101). Accordingly, because the indoor fan 16 is cleaned by the fan cleaning unit 24 in a relatively dry state, the dust adhering to the indoor fan 16 can be appropriately removed by the brush 24b.

的 Modification of the first embodiment≫
In the first embodiment, the process for cleaning the indoor heat exchanger 15 by freezing and thawing the indoor heat exchanger 15 (S102 in FIG. 5) has been described, but it is not limited to this. That is, after cleaning the indoor fan 16 caused by the fan cleaning unit 24, the control unit 30 causes the indoor heat exchanger 15 to function as an evaporator and causes the indoor heat exchanger 15 to dew. For example, the control unit 30 calculates the dew point of the indoor air based on the temperature and relative humidity of the indoor air. Next, the control unit 30 controls the opening degree and the like of the expansion valve 14 (see FIG. 1) so that the temperature of the indoor heat exchanger 15 is lower than the aforementioned dew point and is higher than a specific freezing temperature.

The aforementioned "freezing temperature" is a temperature at which the moisture contained in the indoor air starts to be frozen by the indoor heat exchanger 15 when the temperature of the indoor air is lowered. In such a manner that the indoor heat exchanger 15 is dew-condensed, the dust of the indoor heat exchanger 15 can be washed away with the dew condensation water.

In addition, the cleaning duration of the indoor fan 16 caused by the fan cleaning unit 24 is shorter than the duration of the condensation of the indoor heat exchanger 15 (the time from the start of the compressor 11 to the stop of the condensation for the condensation). Those are better. Thereby, the indoor heat exchanger 15 is cleaned with a sufficient amount of dew condensation water.
When the indoor heat exchanger 15 is dew-condensed, the control unit 30 preferably sets the indoor fan 16 to a stopped state. This can prevent dew condensation from flying out into the room together with air.

Further, for example, when the cleaning by defrosting and thawing of the indoor heat exchanger 15 is performed, the cleaning by the dew condensation of the indoor heat exchanger 15 may be performed next time. That is, the freezing and thawing of the indoor heat exchanger 15 and the washing and dehydration of the indoor heat exchanger 15 can be performed alternately.

≪Second Embodiment≫
The second embodiment is different from the first embodiment in that when the indoor fan 16 is cleaned after the air-conditioning operation is performed, the blower operation is performed before the cleaning. The other parts (such as the configuration of the air conditioner 100: see FIGS. 1 to 4) are the same as those of the first embodiment. Therefore, portions different from those in the first embodiment will be described, and descriptions of overlapping portions will be omitted.

FIG. 7 is a flowchart of processing executed by the control unit 30 of the air conditioner according to the second embodiment (refer to FIG. 2 as appropriate).
In step S201, the control unit 30 executes a specific air-conditioning operation in accordance with an operation command from the remote controller 40 (see FIG. 4). Examples of such an air conditioning operation include a dehumidification operation and a cold room operation or a warm room operation. Next, in accordance with a stop command from the remote control 40 to stop the air-conditioning operation, the process of the control unit 30 proceeds to step S202. When the air-conditioning operation is stopped, it is determined that specific conditions for performing cleaning of the indoor fan 16 (S203) or cleaning of the indoor heat exchanger 15 (S204) are satisfied.

In step S202, the control unit 30 performs an air blowing operation. In addition, during the air supply operation in step S202, the control unit 30 is in a state of closing the upper and lower wind directing plates 23, or it is higher than the level, and the indoor fan 16 is driven at a lower speed than during normal air-conditioning operation. good. Thereby, in the air blowing operation after the stop command from the remote controller 40 (see FIG. 4), the driving sound of the indoor fan 16 is suppressed, thereby reducing the discomfort or discomfort of the user.
Next, after a specific time has elapsed in the air blowing operation of step S202, the processing of the control unit 30 proceeds to step S203.

The processing of steps S203 and S204 is the same as the processing of steps S101 and S102 (see FIG. 5) described in the first embodiment. That is, after cooling room operation, dehumidification operation, or warm room operation (S201), when the indoor fan 16 caused by the fan cleaning unit 24 is cleaned (S203), the control unit 30 is caused by the fan cleaning unit 24 Before cleaning the indoor fan 16, the air supply operation is performed (S202).

For example, after the cooling room operation or dehumidification operation (S201), the indoor heat exchanger 15 may become cold. Depending on the situation, the indoor fan 16 may be condensed and moisture may adhere to it. Here, in the second embodiment, before the indoor fan 16 is cleaned, the control unit 30 performs an air blowing operation (S202), and the indoor fan 16 is dried. Thereby, during the cleaning of the indoor fan 16, the dust of the indoor fan 16 can be appropriately removed because the brush 24b contacts the indoor fan 16 in a dry state.

Further, after the warm-up operation (S201), the indoor heat exchanger 15 becomes high in temperature, and the indoor fan 16 in the vicinity thereof also becomes high in temperature. It is assumed that if the brush 24b contacts the indoor fan 16 in such a state, the hair of the resin brush 24b becomes soft due to heat, and there is a possibility of curling or injury. Here, in the second embodiment, before the indoor fan 16 is cleaned, the control unit 30 performs a blower operation (S202), and returns the indoor fan 16 to a normal temperature (a temperature at which the brush 24b does not cause a problem when contacted). After cleaning the indoor fan 16 in this way (S203), the control unit 30 performs freezing and thawing of the indoor heat exchanger 15 (S204).
Next, the operation states of the compressor 11 and the indoor fan 16 in the processing of steps S201 to S204 in FIG. 7 will be described.

FIG. 8 is a timing chart of the operating states of the compressor 11 and the indoor fan 16 (refer to FIG. 2 as appropriate).
In addition, "ON" shown in FIG. 8 indicates that the compressor 11 and the like are in operation, and "OFF" indicates that the compressor 11 and the like are in stop. The horizontal axis in FIG. 8 is time.

In the example shown in FIG. 8, the air-conditioning operation (up to time t1), the stop status of each device (time t1 to t2), the air supply operation (time t2 to t3), and the stop status of each device (time t3 to t4) and cleaning of the indoor fan 16 (time t4 to t5). The air blowing operation may be performed after the air conditioning operation.

For example, in a case where the indoor heat exchanger 15 is frozen (S204) after one of the air-conditioning operations, that is, the heating operation (S201 in FIG. 7), the direction of the refrigerant circulation is reversed from that during the heating operation. When the direction of the refrigerant cycle is changed in this way, in order to stabilize the refrigeration cycle, it is desirable to leave the compressor 11 in a stopped state (OFF) for a specific time.

In the second embodiment, as described above, after the air-conditioning operation (S201) is stopped, the air-supply operation (S202) and the indoor fan 16 are cleaned (S203), and then the indoor heat exchanger 15 is frozen. (S204). Here, because the compressor 11 is in a stopped state during air supply operation or cleaning of the indoor fan 16, this time (times t1 to t5 shown in FIG. 8) can be used as a time for stabilization of the refrigeration cycle. That is, after the air-conditioning operation, the time until the freezing of the indoor heat exchanger 15 starts can be utilized without waste.

＜ Effects ＞
According to the second embodiment, when the indoor fan 16 is cleaned after the air-conditioning operation, the control unit 30 performs a blower operation (S202 in FIG. 7), and then cleans the indoor fan 16 (S203). In this manner, the indoor fan 16 is blown before the cleaning operation of the indoor fan 16, and the indoor fan 16 can be dried and returned to normal temperature. Therefore, the subsequent cleaning of the indoor fan 16 can be performed appropriately.

In addition, as described above, the compressor 11 is stopped during the air supply operation or cleaning of the indoor fan 16 (see FIG. 8), and this time can be used as the stabilization time for the refrigeration cycle. Therefore, the time from when the air-conditioning operation is stopped to when the freezing and defrosting of the indoor heat exchanger 15 is completed can be shortened.

≪Third Embodiment≫
The third embodiment is different from the first embodiment in that a filter cleaning unit 28 (see FIG. 9) for cleaning the filters 20 a and 20 b is provided. The control unit 30 is different from the first embodiment in that the cleaning of the indoor fan 16 is performed after cleaning of the filters 20a and 20b. The other parts are the same as those of the first embodiment. Therefore, portions different from those in the first embodiment will be described, and descriptions of overlapping portions will be omitted.

FIG. 9 is a perspective view of the filters 20 a and 20 b and the filter cleaning unit 28 included in the indoor unit Ui.
The indoor unit Ui includes a movable filter cleaning unit 28 that cleans the filters 20a and 20b. The filter cleaning unit 28 shown in FIG. 9 includes a frame body 28a, a filter cleaning brush 28b, and a filter cleaning motor (not shown).

The frame body 28a has an inverted L shape and is arranged outside the filters 20a and 20b. Then, the housing 28a is moved in the left-right direction by the drive of a filter cleaning motor (not shown). The filter cleaning brush 28b is a brush for sweeping dust adhering to the filters 20a and 20b, and is provided in the housing 28a.

FIG. 10 is a flowchart of processing executed by the control unit 30 (refer to FIGS. 2 and 4 as appropriate).
In step S301, the control unit 30 cleans the filters 20a and 20b. That is, the control part 30 moves the filter cleaning part 28 (refer FIG. 9) to the left-right direction, and removes the dust adhering to the filters 20a and 20b.

In addition, the control unit 30 may drive the indoor fan 16 during cleaning of the filters 20a and 20b. Thereby, when dust is cleaned by the filter cleaning part 28, it is possible to prevent the dust from being scattered outside the indoor unit Ui. Before the indoor fan 16 is cleaned (S302), the indoor fan 16 is dried by the control unit 30, and the temperature of the indoor fan 16 is close to normal temperature. Thereby, the brush 24b of the fan cleaning part 24 is not hurt, and cleaning of the indoor fan 16 can be performed appropriately.

The processing in the following steps S302 and S303 is the same as the processing in steps S101 and S102 (see FIG. 5) described in the first embodiment. That is, the control unit 30 cleans the filters 20a and 20b (S301) by the filter cleaning unit 28 and the indoor fan 16 (S302) by the fan cleaning unit 24 in this order. The indoor heat exchanger 15 is frozen (or condensed) (S303).

＜ Effects ＞
According to the third embodiment, even if part of the dust scanned by the filter cleaning unit 28 is dropped into the indoor heat exchanger 15 through the gap between the filters 20a and 20b, the indoor heat exchange can be performed later. The device 15 freezes and thaws (S303) to wash away the dust. Further, the time required for cleaning the filters 20a and 20b or the time required for cleaning the indoor fan 16 can be utilized for stabilization of the refrigeration cycle.

≪Fourth Embodiment≫
The fourth embodiment is different from the first embodiment in that the indoor heat exchanger 15 is cleaned at a higher frequency than the cleaning of the indoor fan 16 (see FIG. 11). The operation of the remote controller 40 (see FIG. 4) is different from the first embodiment in that the user can change the frequency. The other parts (such as the configuration of the air conditioner 100: see FIGS. 1 to 4) are the same as those of the first embodiment. Therefore, portions different from those in the first embodiment will be described, and descriptions of overlapping portions will be omitted.

FIG. 11 is a timing chart for cleaning the indoor fan 16 and cleaning the indoor heat exchanger 15 (refer to FIGS. 2 and 4 as appropriate).
In FIG. 11, the oblique line portion of “cleaning of the indoor fan” indicates a time zone during which the indoor fan 16 is cleaned. In addition, the oblique line portion of "cleaning of the indoor heat exchanger" indicates a time period during which the indoor heat exchanger 15 is cleaned (frozen, thawed, etc.).
In the example shown in FIG. 11, when the cleaning of the indoor fan 16 and the cleaning of the indoor heat exchanger 15 have not been performed, a specific air-conditioning operation is continued.

The control unit 30 performs the cleaning of the indoor fan 16 by the fan cleaning unit 24 when the product of the air-conditioning operation execution time from the previous cleaning of the indoor fan 16 reaches the first threshold ΔT1.
The control unit 30 is a product of the product of the execution time of the previous freezing (or dew) air-conditioning operation in the indoor heat exchanger 15 and reached the second threshold value ΔT2 which is shorter than the first threshold value ΔT1. In this case, freezing (or condensation) of the indoor heat exchanger 15 is performed.

In this way, the control unit 30 cleans the indoor heat exchanger 15 at a higher frequency than the cleaning of the indoor fan 16. Thereby, it is possible to appropriately clean the indoor heat exchanger 15 that is more prone to dust adhesion than the indoor fan 16. In addition, since the indoor fan 16 is not cleaned at a high frequency, abrasion of the brushes 24b of the fan cleaning unit 24 can be suppressed.

The first threshold value ΔT1 and the second threshold value ΔT2 shown in FIG. 11 are set in advance, but can be changed by the operation of the remote control 40 (see FIG. 4) by the user as described later.
When the indoor fan 16 has not been cleaned, a specific air-conditioning operation is actually performed or the air-conditioning operation is stopped. Excluding the time during which the stop is being performed, the control unit 30 accumulates the execution time of the air-conditioning operation (the sum of the execution times is calculated sequentially). The same applies to cleaning of the indoor heat exchanger 15.

In addition, when the control unit 30 performs freezing (or dew condensation) of the indoor heat exchanger 15 together with the cleaning of the indoor fan 16, the cleaning of the indoor fan 16 by the fan cleaning unit 24 is performed. To freeze (or dew) the indoor heat exchanger 15. Thereby, the surface of the indoor fan 16 can be cleaned in a relatively dry state. Furthermore, even if the dust adheres to the indoor heat exchanger 15 again as the indoor fan 16 is cleaned, the indoor heat exchanger 15 is frozen and thawed later, so the aforementioned dust is washed away.

Next, setting changes caused by the user of the first threshold value ΔT1 (see FIG. 11) or the second threshold value ΔT2 (see the same figure) will be described with reference to FIG. 12.

FIG. 12 is a flow of processing for setting the cleaning frequency of the indoor fan 16 and the cleaning frequency of the indoor heat exchanger 15.
In step S401, the control unit 30 determines whether the first threshold value ΔT1 indicating the frequency of cleaning of the indoor fan 16 and the second threshold value ΔT2 indicating the frequency of cleaning of the indoor heat exchanger 15 have been input to the remote control 40.

When the first threshold value ΔT1 and the second threshold value ΔT2 are input by the operation of the remote controller 40 by the user (S401: Yes), the processing of the control unit 30 proceeds to step S402. On the other hand, when the first threshold value ΔT1 and the second threshold value ΔT2 have not been input (S401: No), the processing of the control unit 30 returns to "start" ("return").

In step S402, the control unit 30 determines whether the first threshold value ΔT1 is larger than the second threshold value ΔT2. As described above, the first threshold value ΔT1 is a threshold value (a product value from the execution time of the air conditioning operation during the previous cleaning) as a reference for determining whether or not the indoor fan 16 is to be cleaned. On the other hand, the second threshold value ΔT1 is a threshold value used as a criterion for determining whether or not to clean the indoor heat exchanger 15. In step S402, when the first threshold value ΔT1 is larger than the second threshold value ΔT2 (S402: Yes), the processing of the control unit 30 proceeds to step S403.

In step S403, the control unit 30 changes the setting of the first threshold value ΔT1 and the second threshold value ΔT2. Thereby, the intention of a user who wants to change the frequency of cleaning the indoor fan 16 or cleaning the indoor heat exchanger 15 can be appropriately reflected. Furthermore, the indoor heat exchanger 15 which is easily dirty can be cleaned at a higher frequency than the cleaning of the indoor fan 16.

On the other hand, in step S402, when the first threshold value ΔT1 is equal to or less than the second threshold value ΔT2 (S402: No), the processing of the control unit 30 proceeds to step S404.
In step S404, the control unit 30 sends an error notification to the remote controller 40. For example, a notification is sent to the remote controller 40 that the first threshold value ΔT1 is set to a value (longer time) larger than the second threshold value ΔT2. Accordingly, the user can be urged to clean the indoor heat exchanger 15 at a higher frequency than the cleaning of the indoor fan 16.

In step S404, after the error notification is issued, the processing of the control unit 30 returns to "start" ("return"). Next, when the first threshold value ΔT1 and the second threshold value ΔT2 are re-input to the remote control 40 so that ΔT1> ΔT2 according to the aforementioned error notification (S402: Yes), the control unit 30 changes the setting with the values (S403) .

＜ Effects ＞
According to the fourth embodiment, the user can appropriately change the first threshold value ΔT1 indicating the frequency of cleaning of the indoor fan 16 and the second threshold value ΔT2 indicating the frequency of cleaning of the indoor heat exchanger 15 by operation of the remote control 40. When the first threshold value ΔT1 is equal to or less than the second threshold value ΔT2 (S402: No in FIG. 12), the control unit 30 issues an error notification to the remote controller 40 (S404). Thereby, the user can be urged to clean the indoor heat exchanger 15 which is easily dirty more frequently than the cleaning of the indoor fan 16.

≪Fifth Embodiment≫
The fifth embodiment is different from the first embodiment in that a user can cancel cleaning of the indoor fan 16 or cleaning of the indoor heat exchanger 15 by operation of the remote control 40. The rest (the configuration of the air conditioner 100: see FIGS. 1 to 4) is the same as the first embodiment. Therefore, portions different from those in the first embodiment will be described, and descriptions of overlapping portions will be omitted.

FIG. 13 is a flowchart of a process for cleaning the indoor fan 16 or cancelling the cleaning of the indoor heat exchanger 15 (refer to FIGS. 2 and 4 as appropriate). At the time of “start” in FIG. 13, it is determined that cleaning of the indoor fan 16 has not yet started.
In step S501, the control unit 30 determines whether or not a command to cancel the cleaning of the indoor fan 16 is received from the remote control 40.

When a command to cancel the cleaning of the indoor fan 16 is received from the remote controller 40 (S501: Yes), the processing of the control unit 30 proceeds to step S504.
In step S504, the control unit 30 performs freezing and thawing of the indoor heat exchanger 15. That is, before the cleaning of the indoor fan 16 by the fan cleaning unit 24 is started, when the cancellation command of the cleaning of the indoor fan 16 is received from the remote control 40 (S501: Yes), the control unit 30 does not perform the indoor operation. The fan 16 is cleaned to freeze (or dew) the indoor heat exchanger 15 (S504). Thereby, the intention of the user who wants to cancel the cleaning of the indoor fan 16 can be appropriately reflected.

On the other hand, in step S501, when the cancellation command of the cleaning of the indoor fan 16 has not been received from the remote controller 40 (S501: No), the processing of the control unit 30 proceeds to step S502.
In step S502, the control unit 30 determines whether a command to cancel the cleaning of the indoor heat exchanger 15 has been received from the remote controller 40. When a command to cancel the cleaning of the indoor heat exchanger 15 is received from the remote controller 40 (S502: Yes), the control unit 30 ends a series of processes (end). That is, before cleaning of the indoor fan 16 caused by the fan cleaning unit 24 is started, when the freezing cancellation command of the indoor heat exchanger 15 is received from the remote control 40 (S502: Yes), the control unit 30, The freezing (or condensation) of the indoor heat exchanger 15 is not performed, and the cleaning of the indoor fan 16 caused by the fan cleaning unit 24 is also cancelled.

This can appropriately reflect the intention of the user who wants to cancel the cleaning of the indoor heat exchanger 15 this time. In addition, the control unit 30 also cancels the cleaning of the indoor fan 16, which can prevent the dust accompanying the cleaning of the indoor fan 16 from adhering to the indoor heat exchanger 15 again.

In step S502, if there is no cancel command for freezing or thawing of the indoor heat exchanger 15 (S502: No), the processing of the control unit 30 proceeds to step S503. In this case, the cleaning of the indoor fan 16 (S503) and the freezing and thawing of the indoor heat exchanger 15 are performed in the same manner as in the first embodiment (S504).

Although omitted in FIG. 13, the cleaning instruction of the indoor fan 16 may be issued from the remote controller 40 during the cleaning of the indoor fan 16 by the fan cleaning unit 24. In this case, even if the cleaning command of the indoor fan 16 is received from the remote control 40, the control unit 30 freezes (or dew) the indoor heat exchanger 15 after the cleaning of the indoor fan 16 is continued. . This allows the indoor fan 16 to be kept in a clean state regardless of the user's intention. Furthermore, the dust swept from the indoor fan 16 and attached to the indoor heat exchanger 15 can be washed away.

＜ Effects ＞
According to the fifth embodiment, the intention of the user who wants to cancel the cleaning of the indoor fan 16 or the cleaning of the indoor heat exchanger 15 can be appropriately reflected. In addition, when the cleaning instruction of the indoor heat exchanger 15 is received (S502: Yes in FIG. 13), the control unit 30 cancels the cleaning of the indoor fan 16 in addition to the cleaning of the indoor heat exchanger 15. Accordingly, it is possible to prevent the dust that has been cleaned by the indoor fan 16 from adhering to the indoor heat exchanger 15 again.

≪Modifications≫
As mentioned above, although the air conditioner concerning this invention was demonstrated by each embodiment, this invention is not limited to these descriptions, and various changes are possible.
For example, in the second embodiment, the control unit 30 has explained the air conditioning operation (S201 in FIG. 7), the air supply operation (S202), the cleaning of the indoor fan 16 (S203), and the results of the indoor heat exchanger 15 in order. The process of freezing and thawing (S204) is not limited to this. That is, when the indoor fan 16 caused by the fan cleaning unit 24 is cleaned after the cold room operation, dehumidification operation, or warm room operation is performed, the control unit 30 cleans the indoor fan 16 caused by the fan cleaning unit 24. Previously, the machine including the indoor fan 16 could also be stopped for a specific time. According to such processing, the indoor fan 16 can be dried or the temperature of the indoor fan 16 can be brought close to normal temperature by natural air convection.

Furthermore, in the second embodiment, the control unit 30 may perform a blower operation or the like before the indoor fan 16 is cleaned, even after the air-conditioning operation such as the cold room operation. That is, the control unit 30 may perform a blower operation before cleaning the indoor fan 16 caused by the fan cleaning unit 24, or stop a device including the indoor fan 16 for a specific time. Thereby, cleaning of the indoor fan 16 can be performed appropriately.

In the fourth embodiment (see FIG. 12), the configuration of changing the frequency of cleaning the indoor fan 16 or the cleaning of the indoor heat exchanger 15 by the remote control 40 has been described, but the configuration is not limited to this. That is, instead of (or in conjunction with) the remote control 40, the aforementioned frequency may be changed by operating a portable terminal (not shown) such as a smart phone, a portable phone, or a tablet. The same applies to the specific "cancel instruction" described in the fifth embodiment (see Fig. 13).

Furthermore, in the fourth embodiment, it is described that a specific threshold value indicating the frequency of cleaning of the indoor fan 16 or the frequency of cleaning of the indoor heat exchanger 15 is set based on the product value of the execution time of the air-conditioning operation (S401) The processing of the first threshold value ΔT1 and the second threshold value ΔT2: see FIG. 12), but it is not limited to this. For example, instead of the product value of the execution time of the air-conditioning operation, the product value of the driving time of the indoor fan 16 may be used.

The frequency of cleaning the indoor fan 16 or the frequency of cleaning the indoor heat exchanger 15 may be set as follows. That is, the control unit 30 may perform the cleaning of the indoor fan 16 caused by the fan cleaning unit 24 for the first time within a specific period, and perform the first time for more than the first time during the specific period. The freezing (or dew) of the indoor heat exchanger 15 twice. Next, when the indoor heat exchanger 15 is frozen (or dew) together with the cleaning of the indoor fan 16, the control unit 30 may also clean the indoor fan 16 caused by the fan cleaning unit 24. To freeze (or dew) the indoor heat exchanger 15. Also in such a process, the same effect as that of the fourth embodiment is exhibited.

In addition, in the case of the remote controller 40 (or the portable terminal), when the aforementioned first time is set to be greater than the second time, a specific error notification may also be performed on the remote controller 40 (or the portable terminal). Thereby, the user can be urged to clean the indoor heat exchanger 15 which is easily dirty more frequently than the cleaning of the indoor fan 16.

In addition, cleaning of the indoor fan 16 or cleaning of the indoor heat exchanger 15 may be performed based on the elapsed time counted from the time of installation of the air conditioner 100.

In the third embodiment (see FIG. 10), the cleaning of the filters 20 a and 20 b, the cleaning of the indoor fan 16, and the process of freezing the indoor heat exchanger 15 have been described, but the invention is not limited to this. herein. For example, when the control unit 30 cleans the filters 20a and 20b caused by the filter cleaning unit 28 while driving the indoor fan 16, the cleaning of the indoor fan 16 caused by the fan cleaning unit 24 may not be performed next. Thereby, the time for driving the indoor fan 16 can be shortened while the air-conditioning operation is stopped, and the comfort for the user can be improved.

Further, in each embodiment, the control unit 30 may not perform cleaning of the indoor fan 16 caused by the fan cleaning unit 24 or freeze (or dew) the indoor heat exchanger 15 at a specific time zone. . Thereby, the driving sound of the indoor fan 16 or the compressor 11 is not emitted at a specific time zone (for example, at night), and the comfort to the user can be improved.

In each embodiment, an example has been described in which the control unit 30 reverses the rotation of the indoor fan 16 during cleaning of the indoor fan 16 caused by the fan cleaning unit 24. However, the indoor fan 16 may also be rotated to Normal air conditioner operates in the same direction.

Moreover, in each embodiment, the structure in which the control part 30 rotates the shaft part 24a of the fan cleaning part 24 only by a specific angle when cleaning the indoor fan 16 was demonstrated, However, It is not limited to this. For example, a configuration may be adopted in which the shaft portion 24a is moved in parallel as appropriate.

In the first embodiment, an example has been described in which the control unit 30 freezes and thaws the indoor heat exchanger 15 immediately after the indoor fan 16 is cleaned, but the invention is not limited to this. For example, after the indoor fan 16 is cleaned, after the control unit 30 performs an air blowing operation for a specific time, the indoor heat exchanger 15 may be frozen or thawed. After the indoor fan 16 is cleaned, the control unit 30 may freeze or thaw the indoor heat exchanger 15 after stopping each device including the indoor fan 16 for a specific time. After the indoor fan 16 is cleaned, after the control unit 30 performs a specific air-conditioning operation, the indoor heat exchanger 15 may be frozen or thawed. These processes may also be included in "after the cleaning of the indoor fan 16 by the fan cleaning unit 24, the control unit 30 causes the indoor heat exchanger 15 to function as an evaporator and freezes the indoor heat exchanger 15 (or Condensation) ".

Furthermore, in each embodiment, the case where the start conditions of the cleaning of the indoor fan 16 and the cleaning of the indoor heat exchanger 15 were previously set was described, but it is not limited to this. That is, the control unit 30 may start the cleaning of the indoor fan 16 caused by the fan cleaning unit 24 by the operation of the remote control 40 or the portable terminal (not shown) caused by the user.

In addition, for example, when a command signal for cleaning the indoor fan 16 caused by the fan cleaning unit 24 is received from the remote control 40 or the portable terminal, the control unit 30 may be connected to the fan cleaning unit 24. The cleaning of the indoor fan 16 caused the indoor heat exchanger 15 to freeze or dew. Thereby, even if the dust accompanying the cleaning of the indoor fan 16 is attached to the indoor heat exchanger 15, the aforementioned dust can be washed away by the freezing of the indoor heat exchanger 15 and the like thereafter.

In each embodiment, the configuration in which the fan cleaning unit 24 includes the brush 24b has been described, but the configuration is not limited to this. That is, as long as it is a member which can clean the indoor fan 16, a sponge etc. may be used.

Moreover, in each embodiment, the structure which provided one indoor unit Ui (refer FIG. 1) and an outdoor unit Uo (refer the same figure) was demonstrated, However, it is not limited to this. That is, a plurality of indoor units may be connected in parallel, and a plurality of outdoor units may be connected in parallel.
In each embodiment, the wall-mounted air conditioner 100 has been described. However, other types of air conditioners may be applied.

In addition, each embodiment is described in detail for easy and clear description of the present invention, but it is not necessarily limited to those having all the components described. In addition, a part of the configuration of each embodiment can be added, deleted, or replaced with another configuration.
In addition, considering that the aforementioned mechanism or structure is necessary for explanation, the product may not be limited to all the mechanisms or structures indicated.

100‧‧‧ Air Conditioner

11‧‧‧compressor

12‧‧‧ outdoor heat exchanger

13‧‧‧outdoor fan

14‧‧‧Expansion valve

15‧‧‧ indoor heat exchanger (heat exchanger)

16‧‧‧ indoor fan (fan)

20a, 20b‧‧‧Filter

24‧‧‧Fan cleaning department

28‧‧‧ Filter cleaning department

30‧‧‧Control Department

40‧‧‧Remote control

Q‧‧‧Refrigerant circuit

[Fig. 1] Fig. 1 is a configuration diagram of an air conditioner according to a first embodiment of the present invention.

[Fig. 2] Fig. 2 is a longitudinal sectional view of an indoor unit including the air conditioner according to the first embodiment of the present invention.

3 is a perspective view of a part of an indoor unit including the air conditioner according to the first embodiment of the present invention.

4 is a functional block diagram of an air conditioner according to the first embodiment of the present invention.

5 is a flowchart of processing executed by a control unit of the air conditioner according to the first embodiment of the present invention.

6A is an explanatory diagram showing a state during cleaning of an indoor fan in the air conditioner according to the first embodiment of the present invention.

6B is an explanatory diagram showing a state in which the indoor heat exchanger is defrosted in the air conditioner according to the first embodiment of the present invention.

7 is a flowchart of a process performed by a control unit of an air conditioner according to a second embodiment of the present invention.

[FIG. 8] A timing chart related to the operating states of the compressor and the indoor fan in the air conditioner according to the second embodiment of the present invention.

9 is a perspective view of a filter and a filter cleaning unit provided in an indoor unit of an air conditioner according to a third embodiment of the present invention.

10 is a flowchart of a process performed by a control unit of an air conditioner according to a third embodiment of the present invention.

[Fig. 11] Fig. 11 is a timing chart of cleaning of an indoor fan of an air conditioner and cleaning of an indoor heat exchanger according to a fourth embodiment of the present invention.

12 is a flowchart of a process for setting the frequency of cleaning of an indoor fan or cleaning of an indoor heat exchanger in an air conditioner according to a fourth embodiment of the present invention.

13 is a flowchart of a process related to cancellation of cleaning of an indoor fan or cleaning of an indoor heat exchanger in an air conditioner according to a fifth embodiment of the present invention.

Claims (10)

An air conditioner having: Heat exchanger: A dew-receiving tray, which is arranged below the heat exchanger; fan; A fan cleaning unit, which is positioned higher than the dew-receiving tray and is arranged between the heat exchanger and the fan to clean the fan; and A control unit that controls at least the fan and the fan cleaning unit; The control unit causes the heat exchanger to function as an evaporator after the fan is cleaned by the fan cleaning unit, and freezes or dew the heat exchanger. The air conditioner of claim 1, wherein: The duration of the cleaning of the fan by the fan cleaning unit is shorter than the duration of freezing or condensation of the heat exchanger. The air conditioner of claim 1, wherein: When the control unit defrosts the heat exchanger after the freezing of the heat exchanger, or when the dew condensation occurs on the heat exchanger, the control unit stops the fan. The air conditioner of claim 1, wherein: The control unit performs a blower operation before the fan cleaning by the fan cleaning unit, or stops a machine including the fan for a specific time. The air conditioner of claim 4, wherein: When the fan is cleaned by the fan cleaning unit after the cold room operation, dehumidification operation, or warm room operation, the control unit performs air supply operation before the fan cleaning by the fan cleaning unit. , Or stop the machine containing the aforementioned fan for a specific time. For example, the air conditioner of claim 1 further includes: A filter that collects dust from the air toward the aforementioned heat exchanger; and A filter cleaning unit for cleaning the aforementioned filter; The control unit freezes or dew the heat exchanger after performing the cleaning of the filter by the filter cleaning unit and the cleaning of the fan by the fan cleaning unit in sequence. The air conditioner of claim 1, wherein: The aforementioned control unit is When the product value of the air-conditioning operation execution time from the previous cleaning of the fan reaches the first threshold, the fan cleaning is performed again by the fan cleaning unit; When the product value of the previous freezing time or the dew condensation air conditioning operation execution time from the heat exchanger reaches a second threshold value shorter than the first threshold value, the freezing of the heat exchanger is performed again. Or condensation In the case where the heat exchanger is frozen or dewd together with the cleaning of the fan, the heat exchanger is frozen or dewd after the fan is cleaned by the fan cleaning unit. The air conditioner of claim 1, wherein: The aforementioned control unit is Cleaning the fan caused by the fan cleaning unit for the first time in a specific period, Freezing or dew condensation of the heat exchanger for a second number of times more than the first number of times during the specific period, In the case where the heat exchanger is frozen or dewd together with the cleaning of the fan, the heat exchanger is frozen or dewd after the fan is cleaned by the fan cleaning unit. For example, the air conditioner of claim 1 further includes: A filter that collects dust from the air toward the aforementioned heat exchanger; and A filter cleaning unit for cleaning the aforementioned filter; The control unit is configured not to perform cleaning of the fan by the fan cleaning unit when cleaning of the filter by the filter cleaning unit is performed while driving the fan. The air conditioner according to any one of claim 1 to claim 9, wherein: The control unit does not perform cleaning of the fan caused by the fan cleaning unit in a specific time zone, and does not freeze or dew the heat exchanger.