TWI707090B - air conditioner - Google Patents

Abstract

Provided is an air conditioner with a clean fan and heat exchanger. The air conditioner is provided with: an indoor heat exchanger (15); a dew-receiving pan (18) arranged on the lower side of the indoor heat exchanger (15); an indoor fan (16); a fan cleaning part (24), which It is located at a position higher than the dew tray (18), and is arranged between the indoor heat exchanger (15) and the indoor fan (16) to clean the indoor fan (16); and a control unit that controls at least the indoor fan ( 16) And fan cleaning part (24). The control unit makes the indoor heat exchanger (15) function as an evaporator after the indoor fan (26) is cleaned by the fan cleaning unit (24) to freeze or condense the indoor heat exchanger (15).

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 including a "fan cleaning device for removing dust from a fan".

[Prior Technical Literature] [Patent Literature]

[Patent Document 1] Patent No. 4046755 Patent Publication

Patent Document 1 describes a structure for cleaning an indoor fan (fan) as described above, but does not describe a structure for cleaning an indoor heat exchanger (heat exchanger). That is, although it is desired to keep both the indoor fan and the indoor heat exchanger in a clean state, such a structure is not described in Patent Document 1.

Here, the subject of the present invention is to provide an air conditioner that cleans the fan and the heat exchanger.

In order to solve the aforementioned problems, the air conditioner of the present invention includes: an indoor heat exchanger: a dew-receiving pan, which is arranged on the lower side of the indoor heat exchanger and separates the suction side and the blowing side of air; an indoor fan; and a fan A cleaning part, which is located at a higher position than the dew-receiving pan, is arranged on the suction side relative to the dew-receiving pan, and is arranged between the indoor heat exchanger and the indoor fan to clean the indoor fan; and control Section, which controls at least the indoor fan and the fan cleaning section; the control section makes the indoor heat exchanger function as an evaporator after cleaning the indoor fan by the fan cleaning section to heat the room The exchanger is frozen or dew.

According to the present invention, it is possible to provide an air conditioner for cleaning fans and heat exchangers.

≪First embodiment≫ ＜Configuration of air conditioner＞ Fig. 1 is a configuration diagram of an air conditioner 100 according to the first embodiment. Furthermore, the solid arrows in Fig. 1 indicate the flow of refrigerant during heating operation. On the other hand, the dashed arrow in Fig. 1 indicates the flow of refrigerant during cooling operation. In addition, in FIG. 1, the illustration of the fan cleaning part 24 (refer FIG. 2) or the control part 30 (refer FIG. 4) mentioned later is abbreviate|omitted.

The air conditioner 100 is a device that performs air conditioning such as heating operation or cooling 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. In addition to the aforementioned configuration, the air conditioner 100 further includes an indoor heat exchanger 15 (heat exchanger), an indoor fan 16 (fan), and a four-way valve 17.

The compressor 11 is a device that compresses low-temperature and low-pressure gas refrigerant and discharges the high-temperature and high-pressure gas refrigerant, and includes a compressor motor 11a as a driving source. The outdoor heat exchanger 12 is a heat exchanger that performs heat exchange between the refrigerant flowing through the heat transfer pipe (not shown) and the outside air sent by 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 an outdoor fan motor 13 a that is a driving source, and is arranged 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). Furthermore, 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 exchanges heat between the refrigerant circulating 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 an indoor fan motor 16c (see FIG. 4) that is a driving source, 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 connected in order via the four-way valve 17 (Evaporator) In the formed refrigerant circuit Q, the refrigerant is circulated in a refrigeration cycle.

On the other hand, during heating operation (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 this order via the four-way valve 17 In the refrigerant circuit Q formed by the device 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 this order, one of the aforementioned "condenser" and "evaporator" It is an outdoor heat exchanger 12, and the other is an indoor heat exchanger 15.

Furthermore, 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 provided 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. Furthermore, FIG. 2 illustrates a state where the indoor fan 16 has not been cleaned by the fan cleaning unit 24. In addition to the aforementioned indoor heat exchanger 15 or indoor fan 16, the indoor unit Ui also includes: a dew tray 18, a frame base 19, filters 20a, 20b, a front panel 21, left and right wind direction plates 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 penetrating the fins f. In addition, to describe from another viewpoint, the indoor heat exchanger 15 includes an indoor heat exchanger 15 a arranged on the front side of the indoor fan 16 and an indoor heat exchanger 15 b arranged on the rear side of the indoor fan 16. As shown in Fig. 2, the upper end of the front indoor heat exchanger 15a and the upper end of the rear indoor heat exchanger 15b are connected in an inverted V shape.

The indoor fan 16 is, for example, a cylindrical 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 provided with these fan blades 16a, and an indoor fan motor 16c that is a driving source (see FIG. 4).

The dew-receiving pan 18 receives the condensed water of the indoor heat exchanger 15, and is arranged below the indoor heat exchanger 15 (in the example shown in FIG. 2, the front indoor heat exchanger 15a). The frame base 19 is a frame of equipment in which the indoor heat exchanger 15 or the indoor fan 16 is installed.

The filters 20a and 20b are those that collect dust from the air that goes toward the indoor heat exchanger 15 with the driving of the indoor fan 16. One of the filters 20 a is arranged on the front side of the indoor heat exchanger 15, and the other filter 20 b is arranged 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 forward. Furthermore, the front panel 21 may not be rotated.

The left-right wind direction plate 22 is a plate-shaped member that adjusts the flow of the air blown into the room in the left-right direction with the rotation of the indoor fan 16. The left-right wind direction board 22 is arrange|positioned in the blowing air path h3, and is rotated in the left-right direction by the motor 25 (refer FIG. 4) for left-right wind direction boards.

The vertical wind direction plate 23 is a plate-shaped member that adjusts the vertical flow of air blown into the room in accordance with the rotation of the indoor fan 16. The up-and-down wind direction board 23 is arrange|positioned in the vicinity of the air outlet h4, and it rotates in the up-down direction by the motor 26 (refer FIG. 4) for up-and-down wind direction boards.

The air sucked in through the air suction ports h1 and h2 exchanges heat with the refrigerant circulating in the heat transfer tube g of the indoor heat exchanger 15, and the heat-exchanged air is guided to the outlet air path h3. The air circulating in the blowing 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, is blown out into the room through the air blowing port h4.

In addition, most of the dust that goes to the air suction ports h1 and h2 along with the flow of air is collected by the filters 20a and 20b. However, fine dust may pass through the filters 20a and 20b and adhere to the indoor heat exchanger 15 or the indoor fan 16. Therefore, it is desirable to clean the indoor heat exchanger 15 or the indoor fan 16 regularly. Here, in the present embodiment, after the cleaning of the indoor fan 16 by the fan cleaning unit 24, the indoor heat exchanger 15 is cleaned.

The fan cleaning unit 24 shown in FIG. 2 cleans the indoor fan 16 and is arranged between the indoor heat exchanger 15 and the indoor fan 16. In more detail, the fan cleaning part 24 is arrange|positioned in the recessed part r of the indoor heat exchanger 15a of the front side of the front-side indoor heat exchanger 15a which has a vertical cross-sectional view.

Figure 3 is a perspective view of a part of the indoor unit Ui cut away. The fan cleaning unit 24 is provided with a fan cleaning motor 24c (see FIG. 4) in addition to the shaft portion 24a and the brush 24b shown in FIG. 3. The shaft portion 24a is a rod-shaped member parallel to the axial direction of the indoor fan 16, and is pivotally supported near both ends.

The brush 24b removes the 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 the indoor fan 16 is cleaned, the shaft portion 24a and the brush 24b are rotated so that the brush 24b contacts the indoor fan 16, and then the indoor fan 16 is reversely rotated (see FIG. 6A). Next, when the cleaning of the indoor fan 16 is completed, the shaft portion 24a and the brush 24b are rotated so that the brush 24b is separated from the indoor fan 16 (see FIG. 2).

Furthermore, in a state where the fan cleaning unit 24 is separated from the indoor fan 16, as shown in FIG. 2, ideally, the vicinity of the end of the upper brush 24b contacts the indoor heat exchanger 15. By washing the indoor heat exchanger 15 described later, the indoor heat exchanger 15 also washes away the dust of the brush 24b.

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

Although the indoor control circuit 31 is not shown in the figure, it constitutes an electronic circuit including various interfaces such as CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc. Next, the program stored in the ROM is read out and developed to the RAM, and the CPU executes various processing.

As shown in FIG. 4, the indoor control circuit 31 is equipped with the memory|storage part 31a, and the indoor control part 31b. In addition to a specific program, the storage unit 31a also stores data received through the remote control transceiver unit 27, detection values of various sensors (not shown), and the like. 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, etc., based on the data stored in the memory unit 31a.

The outdoor unit Uo is equipped with an outdoor control circuit 32 in addition to the aforementioned configuration. Although the outdoor control circuit 32 is not shown in the figure, it constitutes an electronic circuit including various interfaces such as 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 is equipped with the memory|storage part 32a and the outdoor control part 32b.

In addition to a specific program, the storage unit 32a also stores data received from the indoor control circuit 31 and the like. 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 memory unit 32a. Hereinafter, the indoor control circuit 31 and the outdoor control circuit 32 are collectively referred to as "control unit 30".

FIG. 5 is a flowchart of processing executed by the control unit 30. Furthermore, the air-conditioning operation is not performed at the "start" in FIG. 5, and the end of the brush 24b faces the front 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. Furthermore, as an incentive to start the cleaning of the indoor fan 16, for example, there is a condition that the cumulative time from the air-conditioning operation during the previous cleaning reaches a specific time.

FIG. 6A is an explanatory diagram showing a state in which the indoor fan 16 is being cleaned. In addition, in FIG. 6A, the indoor heat exchanger 15, the indoor fan 16, and the dew-receiving pan 18 are shown, and other components are omitted from illustration. When cleaning the indoor fan 16, the control unit 30 rotates the brush 24 b around the shaft 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 the reverse direction from the normal air-conditioning operation.

When the indoor fan 16 is rotated in the reverse direction in this manner, the brush 24b bends along with the movement of the fan blade 16a, and the pressing brush 24b strokes the back surface of the fan blade 16a. Next, the dust attached to the fan blade 16a is swept away by the brush 24b.

The dust j swept away from the indoor fan 16 is guided to the dew water pan 18 through the gap between the front indoor heat exchanger 15a and the indoor fan 16, as shown in FIG. 6A. This can prevent the dust j from being blown out into the room during the next air-conditioning operation. Moreover, it is also possible that a part of the dust j swept away from the indoor fan 16 does not fall to the dew-receiving pan 18, but adheres to the front indoor heat exchanger 15a. The dust j attached to the front indoor heat exchanger 15a in this way is washed away by the water thawed by the indoor heat exchanger 15 in step S102 described later.

After the process of step S101 is completed, the control unit 30 moves the fan cleaning unit 24 and removes the brush 24b from the indoor fan 16 although omitted in FIG. 5. That is, the control unit 30 rotates the brush 24b with the shaft portion 24a as the center 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 in the room can be suppressed later.

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

For example, the control unit 30 opens the opening degree of the expansion valve 14 (see FIG. 1) to be smaller during operation, so that refrigerant with a low evaporation temperature flows into the indoor heat exchanger 15 at a low pressure. Thereby, the moisture in the air becomes easy to form frost in the indoor heat exchanger 15, and the frost or ice (element symbol i shown in FIG. 6B) becomes easy to grow. Therefore, in the subsequent thawing, the indoor heat exchanger 15 can be washed with a large amount of water.

Furthermore, the duration of the cleaning of the indoor fan 16 by the fan cleaning unit 24 is longer than the duration of freezing of the indoor heat exchanger 15 (the time from the start of the driving of the compressor 11 to the stop for freezing) The shorter one 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 deposited on the indoor heat exchanger 15. In addition, during cleaning of the indoor fan 16, the control unit 30 does not drive the indoor fan motor 16c (see FIG. 4) for a long time needlessly, so the abrasion of the brush 24b can be suppressed.

After freezing the indoor heat exchanger 15 in this way (S102 in FIG. 5), the control unit 30 defrosts the indoor heat exchanger 15 (S102). For example, after the freezing of the indoor heat exchanger 15, the control unit 30 stops the equipment (compressor 11 etc.) including the indoor fan 16 when the indoor heat exchanger 15 is thawed. 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 possibility that the thawed water droplets fly out into the room together with the air.

FIG. 6B is an explanatory diagram showing a state in which the indoor heat exchanger 15 is thawing. By 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 fin f to the dew water pan 18. Thereby, it is possible to wash off the dust j attached to the indoor heat exchanger 15 during the air conditioning operation. Furthermore, the brush 24b in the state in contact with the indoor heat exchanger 15 is also washed together.

Furthermore, as the indoor fan 16 is cleaned, the dust j attached to the front indoor heat exchanger 15a is also washed away, and flows to the dew water tray 18 (see the arrow in FIG. 6B). The water w flowing into the dew-receiving pan 18 in this way is discharged to the outside through a 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 control unit 30 may perform a heating operation or a ventilation operation to dry the interior of the indoor unit Ui. Thereby, the growth of bacteria in the indoor heat exchanger 15 and the like can be suppressed.

<Effects> According to this embodiment, after the indoor fan 16 is cleaned by the fan cleaning unit 24 (S101 in FIG. 5), the freezing and thawing of the indoor heat exchanger 15 are performed (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 user's labor and maintenance expenses required for cleaning the indoor heat exchanger 15 or the indoor fan 16 more than before.

Furthermore, if the order of the cleaning of the indoor fan 16 (S101 in FIG. 5) and the 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 and the interior of the indoor unit Ui is rapidly cooled, the 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 the dust becomes difficult to fall. As a result, the dust of the indoor fan 16 becomes difficult to be swept away by the brush 24b, and there is a possibility that the dust may remain in the indoor fan 16 due to the tightly adhered state of the dust.

In contrast, according to the present embodiment, as described above, the indoor fan 16 is cleaned (S101) before freezing and thawing of the indoor heat exchanger 15 (FIG. 5: S102). Thereby, since the indoor fan 16 is cleaned by the fan cleaning part 24 in a relatively dry state, the dust adhering to the indoor fan 16 can be appropriately cleaned by the brush 24b.

≪Modifications of the first embodiment≫ In the first embodiment, the process of cleaning the indoor heat exchanger 15 by freezing and thawing of the indoor heat exchanger 15 (S102 in FIG. 5) has been described, but it is not limited to this. That is, the control unit 30 functions as an evaporator after the cleaning of the indoor fan 16 by the fan cleaning unit 24, and causes the indoor heat exchanger 15 to condense. 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 of the expansion valve 14 (see FIG. 1), etc. so that the temperature of the indoor heat exchanger 15 is below the aforementioned dew point and higher than the specified freezing temperature.

The aforementioned "freezing temperature" is the 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 drops. By condensing the indoor heat exchanger 15 in this way, the dust in the indoor heat exchanger 15 can be washed away with the dew condensation water.

Furthermore, the duration of the cleaning of the indoor fan 16 by the fan cleaning unit 24 is shorter than the duration of condensation of the indoor heat exchanger 15 (the time from the start of the driving of the compressor 11 to the stop for condensation) The one is better. Thereby, the indoor heat exchanger 15 is cleaned with a sufficient amount of dew condensation water. Moreover, when dew condensation is made on the indoor heat exchanger 15, it is preferable that the control unit 30 turns the indoor fan 16 into a stopped state. This prevents dew condensation water from flying out into the room with the air.

In addition, for example, in a case where washing due to freezing or thawing of the indoor heat exchanger 15 is performed, the washing due to condensation of the indoor heat exchanger 15 may be performed next time. That is, the freezing of the indoor heat exchanger 15 and the cleaning caused by thawing and the cleaning of the indoor heat exchanger 15 caused by condensation can be performed alternately.

≪Second embodiment≫ The second embodiment is different from the first embodiment in that, when cleaning the indoor fan 16 after the air-conditioning operation is performed, the blowing operation is performed before the cleaning. In addition, the other parts (the structure of the air conditioner 100, etc.: see FIGS. 1 to 4) are the same as the first embodiment. Therefore, the different parts from the first embodiment will be described, and the description of the overlapping parts will be omitted.

Fig. 7 is a flowchart related to 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 cooperates with an operation command from the remote controller 40 (see FIG. 4) to execute a specific air-conditioning operation. As such air-conditioning operation, in addition to cooling operation or heating operation, dehumidification operation and the like are exemplified. Next, in response to a stop command from the remote controller 40, after stopping the air-conditioning operation, the processing of the control unit 30 proceeds to step S202. Furthermore, when the air-conditioning operation is stopped, it is determined that a specific condition for performing cleaning of the indoor fan 16 (S203) or cleaning of the indoor heat exchanger 15 (S204) is satisfied.

In step S202, the control unit 30 executes an air blowing operation. Furthermore, during the air blowing operation of step S202, the control unit 30 is in a state where the up and down wind direction plates 23 are closed, or it is upwards than horizontal and drives the indoor fan 16 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, and the user's discomfort or discomfort can be reduced. Next, after the blowing operation of step S202 is performed for a certain period of time, 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 the cooling operation, the dehumidification operation, or the heating operation (S201), the indoor fan 16 is cleaned by the fan cleaning unit 24 (S203), the control unit 30 is caused by the fan cleaning unit 24 Before cleaning the indoor fan 16, a blowing operation is performed (S202).

For example, after the cooling operation or the dehumidification operation (S201), the indoor heat exchanger 15 becomes cold. Depending on the situation, there is a possibility that the indoor fan 16 nearby may condense and adhere to moisture. Here, in the second embodiment, before the cleaning of the indoor fan 16, the control unit 30 performs a blowing operation (S202) to dry the indoor fan 16. With this, during cleaning of the indoor fan 16, since the brush 24 b contacts the indoor fan 16 in a dry state, the dust of the indoor fan 16 can be appropriately cleaned.

Furthermore, after the heating operation (S201), because the indoor heat exchanger 15 becomes high temperature, the indoor fan 16 in the vicinity thereof also becomes high temperature. If the brush 24b touches 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 cleaning of the indoor fan 16, the control unit 30 performs a blowing operation (S202) to return the indoor fan 16 to normal temperature (a temperature at which there is no problem when the brush 24b is in contact). After cleaning the indoor fan 16 in this way (S203), the control unit 30 freezes and defrosts the indoor heat exchanger 15 (S204). Next, the operation state 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 diagram related to 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 etc. are in operation, and "OFF" indicates that the compressor 11 and the like are stopped. In addition, the horizontal axis of FIG. 8 is time.

In the example shown in Figure 8, the air-conditioning operation (until time t1), the stop state of each device (time t1 to t2), the air blowing operation (time t2 to t3), and the stop state of each device (time t3 to t4), and cleaning of the indoor fan 16 (time t4 to t5). Furthermore, it is also possible to perform air blowing operation after the air conditioner is operating.

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

In the second embodiment, as described above, after the air-conditioning operation (S201) is stopped, the air blowing operation (S202) and the cleaning of the indoor fan 16 (S203) are sequentially performed, and then the indoor heat exchanger 15 is frozen or the like. (S204). Here, since the compressor 11 is in a stopped state during the air blowing operation or the indoor fan 16 is being cleaned, the time (time t1 to t5 shown in FIG. 8) can be used as a time for stabilizing 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 wasting.

<Effects> According to the second embodiment, when the indoor fan 16 is cleaned after the air-conditioning operation, the control unit 30 performs the air blowing operation (S202 in FIG. 7), and then cleans the indoor fan 16 (S203). In such a manner that the air blowing operation is performed before the cleaning of the indoor fan 16, 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, because the compressor 11 is stopped during the air blowing operation or the cleaning of the indoor fan 16 (see FIG. 8), this time can be utilized as a time for stabilization of the refrigeration cycle. Therefore, it is possible to shorten the time from when the air-conditioning operation is stopped to when the freezing and thawing of the indoor heat exchanger 15 are completed.

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

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

The frame 28a has an inverted L shape and is arranged outside the filters 20a and 20b. Next, the frame 28a is moved in the left-right direction by the drive of the 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 installed in the frame 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) in the left-right direction, and removes the dust adhering to the filters 20a and 20b.

Furthermore, the control unit 30 may drive the indoor fan 16 during cleaning of the filters 20a and 20b. This prevents the dust from being scattered on the outside of the indoor unit Ui when dust is swept by the filter cleaning unit 28. Before the cleaning of the indoor fan 16 (S302), the indoor fan 16 is dried by the control unit 30 driving the indoor fan 16, and the temperature of the indoor fan 16 is close to normal temperature. Thereby, the brush 24b of the fan cleaning part 24 will not be damaged, and the indoor fan 16 can be cleaned appropriately.

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

<Effects> According to the third embodiment, even if a part of the dust swept by the filter cleaning unit 28 falls into the indoor heat exchanger 15 through the gap between the filters 20a and 20b, it can be exchanged by the subsequent indoor heat Freezing and thawing of the device 15 (S303) to wash away the dust. Furthermore, the time required to clean the filters 20a and 20b or the time required to clean 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 cleaning of the indoor heat exchanger 15 is performed more frequently than the cleaning of the indoor fan 16 (see FIG. 11). Moreover, the point that the user can change the aforementioned frequency by operating the remote controller 40 (see FIG. 4) is also different from the first embodiment. In addition, the other parts (the structure of the air conditioner 100, etc.: see FIGS. 1 to 4) are the same as the first embodiment. Therefore, the different parts from the first embodiment will be described, and the description of the overlapping parts will be omitted.

Fig. 11 is a timing chart related to the cleaning of the indoor fan 16 and the cleaning of the indoor heat exchanger 15 (refer to Figs. 2 and 4 as appropriate). In FIG. 11, the oblique line part of the "cleaning of the indoor fan" indicates the time zone during which the indoor fan 16 is cleaned. In addition, the oblique line part of the "cleaning of the indoor heat exchanger" indicates the time zone during which cleaning (freezing, thawing, etc.) of the indoor heat exchanger 15 is performed. Furthermore, 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, the specific air-conditioning operation continues.

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

In this way, the control unit 30 cleans the indoor heat exchanger 15 more frequently than the indoor fan 16 cleans. Thereby, it is possible to appropriately clean the indoor heat exchanger 15 that is more likely to adhere to dust than the indoor fan 16. In addition, the indoor fan 16 is not cleaned at that high frequency, and the abrasion of the brush 24b of the fan cleaning unit 24 can be suppressed.

In addition, the first threshold ΔT1 and the second threshold ΔT2 shown in FIG. 11 are preset, but as described later, they can be changed by the operation of the remote controller 40 (see FIG. 4) by the user. Furthermore, when the indoor fan 16 has not been cleaned, actually, a specific air-conditioning operation is performed or the air-conditioning operation is stopped. After excluding the time during the stop, the control unit 30 accumulates the execution time of the air-conditioning operation (calculates the sum of the execution time successively). The same applies to the cleaning of the indoor heat exchanger 15.

In addition, the control unit 30 performs the freezing (or condensation) of the indoor heat exchanger 15 together with the cleaning of the indoor fan 16, after cleaning the indoor fan 16 by the fan cleaning unit 24 , The indoor heat exchanger 15 is frozen (or dew). Thereby, when the surface of the indoor fan 16 is relatively dry, the cleaning can be performed. Furthermore, even if dust re-attaches to the indoor heat exchanger 15 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, regarding the setting change caused by the user of the aforementioned first threshold ΔT1 (refer to FIG. 11) or the second threshold ΔT2 (refer to the same figure), it will be explained using FIG. 12.

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

In the case where 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 greater than the second threshold value ΔT2. As described above, the first threshold value ΔT1 is a threshold value used as a criterion for determining whether to perform cleaning of the indoor fan 16 (a product value from the execution time of the air-conditioning operation during the previous cleaning). On the other hand, the second threshold value ΔT1 is a threshold value used as a criterion for determining whether to perform cleaning of the indoor heat exchanger 15. In step S402, if the first threshold ΔT1 is greater than the second threshold ΔT2 (S402: Yes), the processing of the control unit 30 proceeds to step S403.

In step S403, the control unit 30 changes the settings of the first threshold value ΔT1 and the second threshold value ΔT2. Thereby, the intention of the user who wants to change the frequency of cleaning of the indoor fan 16 or the frequency of cleaning of the indoor heat exchanger 15 can be appropriately reflected. Furthermore, the indoor heat exchanger 15 which is easily dirty can be cleaned more frequently 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 system 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 issued to the remote controller 40 that the first threshold value ΔT1 should be set to a value (longer time) greater than the second threshold value ΔT2. Thereby, the user can be urged to clean the indoor heat exchanger 15 more frequently than the indoor fan 16 cleaning.

In step S404, after the error notification is issued, the processing of the control unit 30 returns to "start" ("return"). Next, based on the aforementioned error notification, the first threshold value ΔT1 and the second threshold value ΔT2 are re-inputted to the remote controller 40 such that ΔT1>ΔT2 (S402: Yes), the control unit 30 changes the settings with their 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 operating the remote controller 40. Furthermore, when the first threshold ΔT1 is equal to or less than the second threshold 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 easy to get dirty more frequently than the cleaning of the indoor fan 16.

≪Fifth embodiment≫ The fifth embodiment is different from the first embodiment in that the user can cancel the cleaning of the indoor fan 16 or the indoor heat exchanger 15 by operating the remote controller 40. In addition, the other parts (the structure of the air conditioner 100: refer to FIGS. 1 to 4) are the same as the first embodiment. Therefore, the different parts from the first embodiment will be described, and the description of the overlapping parts will be omitted.

FIG. 13 is a flow chart of the processing related to the cleaning of the indoor fan 16 or the cancellation of the cleaning of the indoor heat exchanger 15 (refer to FIGS. 2 and 4 as appropriate). Furthermore, at the time of "start" in FIG. 13, it is determined that the 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 cleaning of the indoor fan 16 has been received from the remote controller 40.

When a cancellation instruction of 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 freezes and defrosts the indoor heat exchanger 15. That is, before the cleaning of the indoor fan 16 by the fan cleaning unit 24 is started, if a cancellation command for cleaning of the indoor fan 16 is received from the remote controller 40 (S501: Yes), the control unit 30 does not perform indoor cleaning. The fan 16 is cleaned to perform freezing (or condensation) of the indoor heat exchanger 15 (S504). In this way, 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, in a case where a cancellation instruction of 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 or not a command to cancel the cleaning of the indoor heat exchanger 15 has been received from the remote controller 40. When the cancellation command of 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 processing (end). That is, before the cleaning of the indoor fan 16 by the fan cleaning unit 24 is started, if the freezing cancellation command of the indoor heat exchanger 15 is received from the remote controller 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 by the fan cleaning unit 24 is also cancelled.

In this way, the intention of the user who wants to cancel the cleaning of the indoor heat exchanger 15 this time can be appropriately reflected. Furthermore, in a manner that the control unit 30 also cancels the cleaning of the indoor fan 16, it is possible to prevent dust accompanying the cleaning of the indoor fan 16 from being attached to the indoor heat exchanger 15 again.

In step S502, if there is no instruction to cancel 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, as in the first embodiment, the cleaning of the indoor fan 16 (S503) and the freezing and thawing of the indoor heat exchanger 15 (S504) are sequentially performed.

In addition, although omitted in FIG. 13, in the cleaning of the indoor fan 16 by the fan cleaning unit 24, there is a possibility that the remote controller 40 may issue a command to cancel the cleaning of the indoor fan 16. In this case, even if a command to cancel the cleaning of the indoor fan 16 is received from the remote controller 40, the control unit 30 performs freezing (or condensation) of the indoor heat exchanger 15 after continuing the cleaning of the indoor fan 16 . Thereby, regardless of the user's intention, the indoor fan 16 can be kept in a clean state. Furthermore, it is possible to wash off the dust which is swept away from the indoor fan 16 and adhered to the indoor heat exchanger 15.

<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 cancellation instruction of the cleaning 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. Thereby, it is possible to prevent the dust accompanying the cleaning of the indoor fan 16 from being attached to the indoor heat exchanger 15 again.

≪Modifications≫ As mentioned above, although the air conditioner concerning this invention was demonstrated with each embodiment, this invention is not limited to these descriptions, Various changes are possible. For example, in the second embodiment, it is described that the control unit 30 sequentially performs the air-conditioning operation (S201 in FIG. 7), the air blowing operation (S202), the cleaning of the indoor fan 16 (S203), and the structure of the indoor heat exchanger 15. The process of freezing and thawing (S204), however, is not limited to this. That is, when the indoor fan 16 is cleaned by the fan cleaning unit 24 after the cooling operation, dehumidification operation, or heating operation, the control unit 30 is the cleaning of the indoor fan 16 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 close to normal temperature by natural convection of air.

Furthermore, in the second embodiment, even if it is not just after an air-conditioning operation such as a cooling operation, the control unit 30 may perform a blowing operation or the like before cleaning the indoor fan 16. That is, the control unit 30 may perform air blowing operation before cleaning the indoor fan 16 by the fan cleaning unit 24, or stop the equipment including the indoor fan 16 for a specific time. Thereby, the indoor fan 16 can be cleaned appropriately.

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

In addition, in the fourth embodiment, it is explained 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 First threshold ΔT1 and second threshold ΔT2: refer to the processing of 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 of the indoor fan 16 or the frequency of cleaning of the indoor heat exchanger 15 may be set as follows. That is, the control unit 30 can also perform the first number of cleanings of the indoor fan 16 by the fan cleaning unit 24 in a specific period, and in the aforementioned specific period, perform more than the first number of times. Freezing (or condensation) of the indoor heat exchanger 15 for 2 times. Next, in a case where freezing (or condensation) of the indoor heat exchanger 15 is performed together with the cleaning of the indoor fan 16, the control unit 30 may also be used after the cleaning of the indoor fan 16 by the fan cleaning unit 24 , The indoor heat exchanger 15 is frozen (or dew). Also under such processing, the same effect as that of the fourth embodiment is exhibited.

Furthermore, in the remote controller 40 (or the portable terminal), if the aforementioned first frequency is set to be greater than the second frequency, the remote controller 40 (or the portable terminal) may also perform a specific error notification. Thereby, the user can be urged to clean the indoor heat exchanger 15 which is easy to get dirty more frequently than the cleaning of the indoor fan 16.

Furthermore, it is also possible to clean the indoor fan 16 or clean the indoor heat exchanger 15 based on the elapsed time from when the air conditioner 100 is installed.

In addition, in the third embodiment (see FIG. 10), the cleaning of the filters 20a and 20b, the cleaning of the indoor fan 16, and the freezing of the indoor heat exchanger 15 are described in order, but it is not limited Here. For example, when the control unit 30 drives the indoor fan 16 while cleaning the filters 20a and 20b by the filter cleaning unit 28, the cleaning of the indoor fan 16 by the fan cleaning unit 24 may not be performed next. Thereby, since the time for driving the indoor fan 16 during the stop of the air-conditioning operation can be shortened, the comfort for the user can be improved.

In addition, in each embodiment, the control unit 30 may not perform cleaning of the indoor fan 16 by the fan cleaning unit 24, nor freezing (or condensation) of the indoor heat exchanger 15 in a specific time zone. . Thereby, since the driving sound of the indoor fan 16 or the compressor 11 is not emitted in a specific time zone (for example, at night), the comfort for the user can be improved.

In addition, in each embodiment, an example in which the control unit 30 rotates the indoor fan 16 in the reverse direction during the cleaning of the indoor fan 16 by the fan cleaning unit 24 has been described. However, the indoor fan 16 may be rotated forward and Normal air conditioner operates in the same direction.

In addition, in each embodiment, when cleaning the indoor fan 16, the control part 30 rotates the shaft part 24a of the fan cleaning part 24 by a specific angle, but it is not limited to this. For example, it may be configured to appropriately move the shaft portion 24a in parallel.

Furthermore, in the first embodiment, an example was described in which the control unit 30 performs freezing and thawing of the indoor heat exchanger 15 immediately after the cleaning of the indoor fan 16, but it is not limited to this. For example, after the indoor fan 16 has been cleaned, after the control unit 30 has performed the air blowing operation for a specific time, the indoor heat exchanger 15 may be frozen or thawed. Furthermore, after the indoor fan 16 is cleaned, after the control unit 30 stops each device including the indoor fan 16 for a certain period of time, the indoor heat exchanger 15 may be frozen or thawed. Furthermore, after the indoor fan 16 has been cleaned, after the control unit 30 has performed 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 makes the indoor heat exchanger 15 function as an evaporator to freeze the indoor heat exchanger 15 (or Condensation)” matters.

In addition, in each embodiment, the case where the start conditions of the cleaning of the indoor fan 16 or the cleaning of the indoor heat exchanger 15 are set in advance has been described, but it is not limited to this. That is, the control unit 30 may start the cleaning of the indoor fan 16 by the fan cleaning unit 24 by the operation of the remote controller 40 or the portable terminal (not shown) by the user.

Moreover, for example, when a command signal for cleaning the indoor fan 16 by the fan cleaning unit 24 is received from the remote controller 40 or the portable terminal, the control unit 30 may be in the fan cleaning unit 24 After the indoor fan 16 is cleaned, the indoor heat exchanger 15 freezes or condenses. Thereby, even if the dust cleaned by the indoor fan 16 adheres to the indoor heat exchanger 15, the aforementioned dust can be washed away by the freezing of the indoor heat exchanger 15 later.

Furthermore, in each embodiment, the fan cleaning unit 24 has been described with the brush 24b, but it is not limited to this. That is, as long as it is a member that can clean the indoor fan 16, a sponge or the like may be used.

In addition, in each embodiment, the configuration in which one indoor unit Ui (refer to FIG. 1) and one outdoor unit Uo (refer to the same figure) are installed is described, but 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. Furthermore, in each embodiment, the wall-mounted air conditioner 100 has been described, but other types of air conditioners may also be applied.

In addition, each embodiment is described in detail in order to make it easy to clearly describe the present invention, but it is not necessarily limited to those having all the described configurations. In addition, part of the configuration of each embodiment can be added, deleted, or replaced with other configurations. Furthermore, in consideration of the necessity for the description to show the aforementioned mechanisms or configurations, the product is not necessarily limited to all the mechanisms or configurations shown.

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 section 30‧‧‧Control Department 40‧‧‧Remote control Q‧‧‧Refrigerant circuit

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 equipped with an air conditioner according to a first embodiment of the present invention.

[Fig. 3] Fig. 3 is a perspective view of a part of the indoor unit including the air conditioner according to the first embodiment of the present invention, which is cut away. Fig. 4 is a functional block diagram of the air conditioner according to the first embodiment of the present invention. [Fig. 5] is a flowchart of processing executed by the control unit of the air conditioner according to the first embodiment of the present invention. [Fig. 6A] is an explanatory diagram showing a state in which the indoor fan is being cleaned in the air conditioner according to the first embodiment of the present invention. [Fig. 6B] is an explanatory diagram showing a state in which the indoor heat exchanger is thawing in the air conditioner according to the first embodiment of the present invention. [Fig. 7] Fig. 7 is a flowchart of processing executed by the control unit of the air conditioner according to the second embodiment of the present invention. Fig. 8 is 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. [Fig. 9] Fig. 9 is a perspective view of a filter and a filter cleaning unit included in an indoor unit of an air conditioner according to a third embodiment of the present invention. [Fig. 10] Fig. 10 is a flowchart of processing executed by the control unit of the air conditioner according to the third embodiment of the present invention. Fig. 11 is a timing chart of cleaning the indoor fan of the air conditioner and cleaning the indoor heat exchanger according to the fourth embodiment of the present invention. [Fig. 12] Fig. 12 is a flowchart of processing for setting the frequency of cleaning of the indoor fan or cleaning of the indoor heat exchanger in the air conditioner according to the fourth embodiment of the present invention. [Fig. 13] Fig. 13 is a flowchart of processing related to cleaning of the indoor fan or cancellation of the cleaning of the indoor heat exchanger in the air conditioner according to the fifth embodiment of the present invention.

15‧‧‧Indoor heat exchanger (heat exchanger)

15a‧‧‧Front indoor heat exchanger

15b‧‧‧Rear side indoor heat exchanger

16‧‧‧Indoor fan (fan)

16a‧‧‧Fan Blade

16b‧‧‧Partition plate

18‧‧‧Dew water tray

19‧‧‧Frame base

20a、20b‧‧‧Filter

21‧‧‧Front panel

22‧‧‧Left and right wind direction board

23‧‧‧Up and down wind direction board

24‧‧‧Fan Cleaning Department

24a‧‧‧Shaft

24b‧‧‧brush

f‧‧‧Fin

g‧‧‧Heat transfer tube

h1, h2‧‧‧Air suction port

h3‧‧‧Blow out the wind road

h4‧‧‧Air outlet

Claims (10)

An air conditioner comprising: an indoor heat exchanger: a dew-receiving pan arranged on the lower side of the aforementioned indoor heat exchanger to separate the suction side and the blowing side of the air; an indoor fan; The position where the dew-receiving pan is still higher is arranged on the suction side relative to the dew-receiving pan, and is arranged between the indoor heat exchanger and the indoor fan to clean the indoor fan; and a control unit that controls at least the indoor The fan and the fan cleaning unit; the control unit makes the indoor heat exchanger function as an evaporator after cleaning the indoor fan by the fan cleaning unit, and freezes or condenses the indoor heat exchanger. The air conditioner of claim 1, wherein the duration of the cleaning of the indoor fan by the fan cleaning part is shorter than the duration of freezing or condensation of the indoor heat exchanger. The air conditioner of claim 1, wherein the control unit defrosts the indoor heat exchanger after freezing In the case of the indoor heat exchanger, or when the indoor heat exchanger is condensed, the indoor fan is stopped. The air conditioner according to claim 1, wherein the control unit performs air blowing operation or stops the equipment including the indoor fan for a specific time before cleaning the indoor fan by the fan cleaning unit. The air conditioner of claim 4, wherein, in the case where the indoor fan is cleaned by the fan cleaning unit after the cooling operation, dehumidification operation, or heating operation, the control unit is located at the fan cleaning unit Before cleaning the indoor fan, perform air blowing operation, or stop the machine including the indoor fan for a specific time. The air conditioner according to claim 1, further comprising: a filter that collects dust from the air toward the indoor heat exchanger; and a filter cleaning section that cleans the filter; the control section is attached to After performing the cleaning of the filter by the filter cleaning part and the cleaning of the indoor fan by the fan cleaning part in this order, the indoor heat exchanger is frozen or dew formed. Such as the air conditioner of claim 1, in which, The control unit performs the cleaning of the indoor fan again by the fan cleaning unit when the product value of the execution time of the air-conditioning operation of the previous cleaning from the indoor fan reaches the first threshold; If the product value of the previous freezing or condensation air conditioning operation execution time of the indoor heat exchanger reaches a second threshold value shorter than the aforementioned first threshold value, the aforementioned indoor heat exchanger freezes or freezes again. Condensation; in the case of freezing or condensation of the indoor heat exchanger together with the cleaning of the indoor fan, the indoor heat exchange is performed after the indoor fan is cleaned by the fan cleaning section The device is frozen or dew. An air conditioner according to claim 1, wherein the control section performs cleaning of the indoor fan by the fan cleaning section for the first number of times in a specific period, and performs more than the first number of times in the specific period The second number of freezing or condensation of the indoor heat exchanger is performed at the same time as the cleaning of the indoor fan and the freezing or condensation of the indoor heat exchanger is performed at the fan cleaning section. After the cleaning of the indoor fan, the indoor heat exchanger freezes or condenses. The air conditioner according to claim 1, further comprising: a filter that collects dust from the air toward the indoor heat exchanger; and a filter cleaning section that cleans the filter; the control section is attached to When cleaning the filter by the filter cleaning part while driving the indoor fan, the cleaning of the indoor fan by the fan cleaning part is not performed next. An air conditioner according to any one of claim 1 to claim 9, wherein the control unit does not perform cleaning of the indoor fan caused by the fan cleaning unit and does not perform the indoor heat exchange during a specific time zone Freezing or condensation of the device.

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