TWI655399B - air conditioner - Google Patents

Abstract

The system includes an indoor heat exchanger, an indoor fan, and a fan cleaning unit (51) arranged between the indoor heat exchanger and the indoor fan to clean the indoor fan, and a base for cleaning the fan (51). A shaft-shaped support portion (50) supporting the end portion (51a) at the hollow portion (50b). At least when the operation of the fan cleaning section (51) is stopped, the support section (50) in the hollow section (50b) of the support section (50) has the base end portion (51a) of the fan cleaning section (51) at least below the side to support ( 50f) is tilted.

Description

air conditioner

The present invention relates to an air conditioner.

As a background art in this technical field, Japanese Patent Application Laid-Open No. 2007-71210 (Patent Publication No. 4046755) exists (Patent Document 1). In this publication, there is described "a movable fan cleaning device provided at a fan casing portion of a fluid feeding device to remove dust adhering to the fan" (see the abstract). [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2007-71210

[Problems to be Solved by the Invention]

The technique of the aforementioned Patent Document 1 includes a fan cleaning device and a control device that controls the fan cleaning device. The fan cleaning device includes a normal operation mode for blowing out air-conditioned air into the room and a fan cleaning operation mode in which the fan is rotated at a low speed and the fan cleaning device is movable. The fan cleaning device is provided with a fan at the front end. The cleaning part can be moved to a position where the fan cleaning part is avoided during the fan cleaning operation mode.

However, in a configuration in which the fan cleaning device includes a fan cleaning portion (brush, etc.) and its supporting portion, since the fan cleaning device is disposed inside the indoor unit, dew condensation also occurs in the fan cleaning device itself. In particular, when the fan cleaning device is arranged around the indoor heat exchanger, dew condensation is likely to occur. In addition, if the fan cleaning device continues to be in a state of dew condensation for a long period of time, it may cause mold or rust in the fan cleaning device. In particular, where the fan cleaning portion and the support portion are in contact with each other, the wind system is difficult to pass through and it is difficult to dry the wind system. As a countermeasure to this problem, although anti-mold materials can also be used, this will become an important factor in the increase of manufacturing costs or operating costs. Therefore, an object of the present invention is to provide an air conditioner capable of suppressing the occurrence of mold or rust of a fan cleaning device. [Means to solve the problem]

In order to solve the above problems, an air conditioner according to one aspect of the present invention includes: an indoor heat exchanger; and an indoor fan; and a fan cleaning section for cleaning the indoor fan; and a support section for the interior. The base end portion of the fan cleaning portion is supported. When the operation of the fan cleaning portion is stopped, the surface in the support portion that supports the base end portion of the fan cleaning portion at the lower side is inclined. [Effect of the invention]

According to the present invention, it is possible to provide an air conditioner capable of suppressing the occurrence of mold or rust of a fan cleaning device. Problems, structures, and effects other than the above description will become more apparent based on the following description of the embodiments.

Hereinafter, embodiments of the present invention will be described using drawings. Example 1

Hereinafter, embodiments of the present invention will be described using drawings. In the following, when the up-down direction is described, it follows the arrow that is appropriately illustrated in the drawing. When the front-rear direction is indicated by an arrow, the front-rear direction is a horizontal direction. FIG. 1 is a system diagram of the refrigerant circuit Q of the air conditioner 100 of this embodiment. The solid arrows in FIG. 1 represent the flow of the refrigerant during the heating operation. The dotted arrows in FIG. 1 represent the flow of the refrigerant during the air-conditioning 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, an indoor fan 16, 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 by driving the compressor motor 11a and discharges the gas refrigerant as a high-temperature and high-pressure gas refrigerant.

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 from the outdoor fan 13. The outdoor fan 13 is a fan that sends outside air into the outdoor heat exchanger 12 by being driven by the outdoor fan motor 13 a, and is installed near the outdoor heat exchanger 12. The expansion valve 14 is a valve for reducing the pressure of the refrigerant condensed by the "condenser" (one of the outdoor heat exchanger 12 and the indoor heat exchanger 15 depending on the type of air conditioning operation). In addition, the refrigerant decompressed at the expansion valve 14 is guided to the "evaporator" (depending on the type of air-conditioning operation, it is the other of the outdoor heat exchanger 12 and the indoor heat exchanger 15) Office.

The indoor heat exchanger 15 is heat for exchanging heat between the refrigerant flowing through the heat transfer pipe g (refer to FIG. 2) and the indoor air (air in the air-conditioned space) sent from the indoor fan 16. Exchanger. The indoor fan 16 is a fan that sends indoor air into the indoor heat exchanger 15 by being driven by the indoor fan motor 16c (see FIG. 4), and is installed near the indoor heat exchanger 15. To explain in more detail, the indoor fan 16 is installed on the downstream side of the indoor heat exchanger 15 during the flow of air when the indoor fan 16 is rotating normally.

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 air-conditioning operation (refer to 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 (evaporator) are passed through a four-way valve 17. In the refrigerant circuit Q formed in a loop and connected sequentially, the refrigerant is circulated by a refrigeration cycle.

On the other hand, during heating operation (refer to the solid arrow in FIG. 1), the compressor 11, the indoor heat exchanger 15 (condenser), the expansion valve 14, and the outdoor heat exchanger 12 (evaporator) The directional valve 17 is connected to the refrigerant circuit Q formed in a ring shape in order, and the refrigerant is circulated in a refrigeration cycle. 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 at the outdoor unit Uo. On the other hand, the indoor heat exchanger 15 and the indoor fan 16 are installed at the indoor unit Ui.

FIG. 2 is a cross-sectional view of the indoor unit Ui. In addition, FIG. 2 illustrates a state where the indoor fan 16 is not cleaned by the fan cleaning device 24. The indoor unit Ui, in addition to the indoor heat exchanger 15 and the indoor fan 16 described above, is also provided with an exposure pan 18, a chassis base 19, filters 20a, 20b, a front panel 21, and left and right wind direction panels 22. , And the up-and-down wind direction plate 23 and the fan cleaning device 24.

The indoor heat exchanger 15 includes a plurality of fins f and a plurality of heat transfer tubes g that pass through the fins f. Moreover, if it demonstrates from another viewpoint, the indoor heat exchanger 15 is equipped with the front indoor heat exchanger 15a and the rear indoor heat exchanger 15b. The front-side indoor heat exchanger 15 a is disposed on the front side (indoor side) of the indoor fan 16. On the other hand, the rear-side indoor heat exchanger 15 b is disposed on the rear side (wall side) of the indoor fan 16. The upper end portion of the front indoor heat exchanger 15a and the upper end portion of the rear indoor heat exchanger 15b are connected.

The dew pan 18 is a person who receives condensate from the indoor heat exchanger 15 and is disposed below the indoor heat exchanger 15 (in the example shown in FIG. 2, it is the front-side indoor heat exchanger 15 a). The indoor fan 16 is, for example, a cylindrical cross flow fan, and is disposed near the indoor heat exchanger 15. The indoor fan 16 includes a plurality of fan blades 16a, a partition 16b provided with the fan blades 16a, and an indoor fan motor 16c as a driving source (see FIG. 4).

The indoor fan 16 is preferably coated with a hydrophilic coating agent. As such a coating material, for example, it is also possible to add a binder (a silicon compound having a hydrolyzable group) to a silica dioxide sol in which isopropyl alcohol is dispersed as a hydrophilic material, butanol, Tetrahydrofuran and antibacterial agents.

Accordingly, since a hydrophilic film is formed on the surface of the indoor fan 16, the resistance value of the surface of the indoor fan 16 becomes small, and it becomes difficult for dust to adhere to the indoor fan 16. That is, when the indoor fan 16 is driven, it is difficult for the surface of the indoor fan 16 to generate static electricity caused by friction with the air, so that the adhesion of dust to the indoor fan 16 can be suppressed. As such, the aforementioned coating agent also functions as an antistatic agent for the indoor fan 16.

The frame base 19 shown in FIG. 2 is a frame of a machine provided with an indoor heat exchanger 15 and an indoor fan 16 and the like. The filter screen 20 a is for removing dust from the air of the air inlet port h1 facing the front side, and is installed at the front side of the indoor heat exchanger 15. The filter screen 20b is a device for removing dust from the air sucked into the air from the air inlet h2 toward the upper side, and is installed on the upper side of the indoor heat exchanger 15.

The front panel 21 is a panel provided so as to cover the front screen 20a, and a rotation shaft (not shown) is provided at the lower end so as to be rotatable toward the front side. In addition, the front panel 21 may be configured not to rotate. The left and right wind direction plates 22 are plate-like members that adjust the flow of the air in the left-right direction that is blown into the room as the indoor fan 16 rotates. The left and right wind direction plates 22 are arranged at the blow-out air path h3, and are rotated in the left and right directions by the left and right wind direction plate motors 25 (see FIG. 5).

The up-and-down wind direction plate 23 is a plate-like member that adjusts the up-and-down flow of the air blown into the room as the indoor fan 16 rotates. The up-and-down wind direction plate 23 is arranged near the air blow-out port h4, and is rotated in the up-and-down direction by the up-and-down wind direction plate motor 26 (refer to FIG. 5). The air sucked in through the air inlets h1 and h2 is heat-exchanged with the refrigerant flowing through the heat transfer pipe g of the indoor heat exchanger 15 and the air after the heat exchange is guided to the air outlet. 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 is further blown out to the room through the air blowing outlet h4.

In addition, most of the dust that is directed to the air suction ports h1 and h2 along with the flow of air is captured and collected by the filters 20a and 20b. However, fine dust systems may pass through the filters 20 a and 20 b and attach to the indoor heat exchanger 15 or the indoor fan 16. Therefore, it is desirable to periodically clean the indoor heat exchanger 15 and the indoor fan 16. Therefore, in this embodiment, after the indoor fan 16 is cleaned using the fan cleaning device 24 described below, the indoor heat exchanger 15 is rinsed with water.

The fan cleaning device 24 shown in FIG. 2 is a cleaner for the indoor fan 16 and is disposed between the indoor heat exchanger 15 and the indoor fan 16. For a more detailed explanation, the fan cleaning device 24 is disposed at a position closer to the indoor fan 16 side than the recess r of the front-side indoor heat exchanger 15a which is in a zigzag shape when viewed in a longitudinal section. In the example shown in FIG. 2, an indoor heat exchanger 15 (below the front-side indoor heat exchanger 15 a) is located below the fan cleaning device 24, and an exposure pan 18 is provided.

FIG. 3 is a perspective view in which a part of the indoor unit Ui is cut away. The fan cleaning device 24 includes a fan cleaning motor 24c in addition to the support portion 50 and the fan cleaning portion 51 shown in FIG. 3 (see FIG. 4). The support portion 50 is a shaft-shaped member parallel to the axial direction of the indoor fan 16, and both ends thereof are supported by the shaft through the housing base 19 (not shown).

The fan cleaning part 51 is a person who removes the dust adhering to the fan blade 16a, and has a base end part supported by the support part 50. The fan cleaning portion 51 may be configured by a brush or a flexible blade made of rubber or the like. That is, as long as the fan cleaning unit 51 can scrape off the dust adhering to the fan blades 16a, various members can be used. The fan cleaning motor 24c (refer to FIG. 4) is, for example, a stepping motor and has a function of rotating the support portion 50 at a specific angle.

When the indoor fan 16 is cleaned by the fan cleaning device 24, the fan cleaning motor 24c (see FIG. 4) is contacted with the fan cleaning unit 51 and the indoor fan 16 (see FIG. 10A). The indoor fan 16 is driven to rotate in the reverse direction. When the cleaning of the indoor fan 16 by the fan cleaning device 24 is completed, the fan cleaning motor 24c is driven again, the fan cleaning unit 51 is rotated, and the fan cleaning unit 51 is separated from the indoor fan 16. Status (refer to Figure 2).

FIG. 4 is a functional block diagram showing a control system of the air conditioner 100. The indoor unit Ui shown in FIG. 4 is provided with a remote control transmitting / receiving unit 27 and an indoor control circuit 31 in addition to the aforementioned configuration. The remote control transmitting and receiving unit 27 exchanges specific information between itself and the remote control 40.

Although not shown, the indoor control circuit 31 is constituted by an electronic circuit including a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), and various interfaces. In addition, the program stored in the ROM is read out and expanded into the RAM, and the CPU executes various processes.

As shown in FIG. 4, the indoor control circuit 31 includes a memory section 31 a and an indoor control section 31 b. In addition to a specific program, the memory unit 31a also stores data received by the receiving unit 27 via the remote controller, and 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, and the up and down wind direction board motors 26 based on the data stored in the memory unit 31a.

The outdoor unit Uo is provided with an outdoor control circuit 32 in addition to the aforementioned configuration. Although not shown, the outdoor control circuit 32 is an electronic circuit including a CPU, ROM, RAM, various interfaces, and the like, and is configured to be connected to the indoor control circuit 31 via 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.

The memory unit 32a stores, in addition to a specific program, data and the like received from the indoor control circuit 31. 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 the "control unit 30".

In addition, the technology of the aforementioned Patent Document 1 includes a fan cleaning device and a control device that controls the fan cleaning device. The fan cleaning device includes a normal operation mode for blowing out air-conditioned air into the room, and a fan cleaning operation mode in which the fan is rotated at a low speed and the fan cleaning device is movable. The fan cleaning device is provided with a fan at the front end. The cleaning part can be moved to a position where the fan cleaning part is avoided during the fan cleaning operation mode.

However, in a configuration in which the fan cleaning device includes a fan cleaning portion (brush, etc.) and its supporting portion, since the fan cleaning device is disposed inside the indoor unit, dew condensation also occurs in the fan cleaning device itself. In particular, when the fan cleaning device is arranged around the indoor heat exchanger, dew condensation is likely to occur. In addition, if the fan cleaning device continues to be in a state of dew condensation for a long period of time, it may cause mold or rust in the fan cleaning device. In particular, where the fan cleaning portion and the support portion are in contact with each other, the wind system is difficult to pass through and it is difficult to dry the wind system. As a countermeasure to this problem, although anti-mold materials can also be used, this will become an important factor that increases the manufacturing cost or operating cost of the air conditioner. Therefore, the following description focuses on the fan cleaning device 24 that provides a countermeasure against such problems.

FIG. 5A is a cross-sectional view of a state where the fan cleaning device 24 is cut in the radial direction, and FIG. 5B is a front view thereof. The states of FIGS. 5A and 5B are shown for states other than when the indoor fan 16 is cleaned. In this embodiment, except when the indoor fan 16 is cleaned, as shown in FIGS. 2 and 3, the front end of the front end portion 51 b of the fan cleaning portion 51 is oriented slightly vertically downward. Specifically, apart from when the indoor fan 16 is being cleaned (including during normal air-conditioning operation), the fan cleaning unit 51 is separated from the indoor fan 16 in a state where the front end of the fan cleaning portion 51 faces slightly vertically.

However, the present invention is not limited to a configuration in which the front end of the fan cleaning portion 51 faces slightly vertically except when the indoor fan 16 is cleaned. FIG. 6 is a cross-sectional view of the fan cleaning device 24. That is, as exemplified in FIG. 6, the arrangement can be made such that the long-side direction of the fan cleaning portion 51 and the vertical up-down direction are at an acute angle. In this case, the front end side of the fan cleaning portion 51 can be brought closer to the front indoor heat exchanger 15a side, and it can also be brought closer to the indoor fan 16 side. Hereinafter, a description will be made with a configuration that “is separated from the indoor fan 16 with the front end of the fan cleaning unit 51 facing slightly vertically except when the indoor fan 16 is cleaned”.

As shown in FIGS. 5A and 5B, the fan cleaning device 24 includes a fan cleaning portion 51 and a support portion 50. The support portion 50 is a long shaft-shaped member (FIG. 3), and is formed at a position below the support portion 50 when the operation of the fan cleaning portion 51 is stopped (states of FIGS. 5A and 5B). There is an elongated hole 50 a extending in the axial direction of the support portion 50. This long hole 50a reaches the shaft core portion of the support portion 50. At this shaft core portion, a hollow that is widened toward the left and right directions in FIG. 5A and FIG. 5B and is connected to the long hole 50a is formed.部 50b。 50b.

The fan cleaning portion 51 may be configured by a brush or a flexible blade made of rubber or the like. That is, as long as the fan cleaning unit 51 can scrape off the dust adhering to the fan blades 16a, various members can be used. In the state of Fig. 5A and Fig. 5B, the fan cleaning portion 51 has its base end portion 51a bulging to the left and right. In addition, the bulged base end portion 51a facing right and left is fitted into the hollow portion 50b, and the front end side 51b of the fan cleaning portion 51 protrudes out of the support portion 50 with the long hole 50a as an outlet. The hollow portion 50b of the support portion 50 is a longer hole 50a and is expanded to the left and right in the state shown in FIG. 5. Since the base end portion 51a of the fan cleaning portion 51 also bulges to the left and right, the fan cleaning portion The base end portion 51 a of 51 is engaged with the hollow portion 50 b of the support portion 50, and prevents the fan cleaning portion 51 from falling out of the support portion 50.

In addition, the base end portion 51a of the fan cleaning portion 51 is fitted into the hollow portion 50b of the support portion 50, and the two are not joined by means such as adhesion, fusion, or the like. The reason is that it is possible to remove the fan cleaning unit 51 only from the support unit 50 when the fan cleaning unit 51 needs to be exchanged due to deterioration over time. If the fan cleaning portion 51 and the support portion 50 are joined to each other, the fan cleaning portion 51 must be removed from the chassis base 19 of the air conditioner 100 together with the support portion 50 when the fan cleaning portion 51 is exchanged. The support portion 50 has a specific structure such that both ends thereof are supported by the shaft through the housing base 19. Therefore, if the fan cleaning unit 51 and the support unit 50 are to be exchanged as a whole, there will be difficulties. Further, if only the fan cleaning unit 51 is exchanged and the support unit 50 is continuously used, the user can also achieve savings in parts exchange costs.

Also, at least when the operation of the fan cleaning section 51 is stopped (states of FIGS. 5A and 5B), the hollow section 50b in the support section 50 supports the base end portion 51a of the fan cleaning section 51 at least below the supporting surface. 50f is the inclined surface. More specifically, the surface 50f is inclined downward toward the long hole 50a which is the exit of the fan cleaning portion 51 from the support portion 50.

Furthermore, at least when the operation of the fan cleaning unit 51 is stopped (states of FIGS. 5A and 5B), the water is directed toward the body from the outer surface 51d side of the base end portion 51a of the fan cleaning unit 51 in the support unit 50. The long hole 50a of the exit of the fan cleaning portion 51 is inclined in the direction of flow. In addition, the inner surface 50c (the inner peripheral surface of the hollow portion 50b) of the support portion 50 located around the outer surface 51d is also the length from the inner surface 50c side to the direction of the water toward the exit of the fan cleaning portion 51 The direction in which the hole 50a flows is inclined.

That is, at the outer surface 51d of the base end portion 51a of the fan cleaning portion 51, the left and right surfaces of the base end portion 51a are slightly vertical surfaces, and the surface of the fan cleaning portion 51 through the long hole 50a is also slightly Face in vertical direction. Furthermore, the upper surface of the base end portion 51a is the same. In the example of FIG. 5A and FIG. 5B, it is slightly inclined from the left side toward the right side, instead of being a horizontal plane (it may be configured to descend from the right side toward the left side). tilt). Similarly, at the inner surface 50c of the support portion 50 (the inner peripheral surface of the hollow portion 50b, etc.), the left and right surfaces of the hollow portion 50b are slightly vertical surfaces, and the inner surface of the long hole 50a is also slightly vertical. Face. Furthermore, the upper surface of the inner surface 50c is also slightly inclined downward from the left to the right, and is not a horizontal plane (it may be configured to descend downward from the right to the left). In the drawings after FIG. 6, when the same fan cleaning device 24 as that shown in FIGS. 5A and 5B is shown, when it is in a general state like that of FIGS. 5A and 5B, the upper surface of the base end portion 51 a is The upper surface of the inner surface 50c is shown as a slightly horizontal plane. In addition, these faces are not absolutely required to be horizontal. The outer surface 50d of the support portion 50 is inclined at least when the operation of the fan cleaning device 24 is stopped (the state in FIG. 5). Specifically, in the example of FIG. 5A and FIG. 5B, the outer surface 50 d of the support portion 50 has an outer shape in a radial cross section that is substantially circular. Therefore, there is no horizontal surface at 50d.

The support portion 50 is independent of the long hole 50a which is an outlet of the fan cleaning portion 51, and further includes a through hole that connects the internal hollow portion 50b of the base end portion 51a of the fan cleaning portion 51 to the outside. 50e. The through-hole 50e may be any place where the through-hole 50 is penetrated. In the example of FIGS. 5A and 5B, a plurality of through-holes 50 e are vacated at specific intervals on two sides of the long hole 50 a, and two rows are arranged side by side in the longitudinal direction of the support portion 50. 5A and 5B, the through hole 50e is inclined downward from the hollow portion 50b supporting the base end portion 51a of the fan cleaning portion 51 toward the outside. In this case, it is preferable that the lower inner surface in the hollow portion 50b is inclined downward toward the respective through holes 50e.

FIG. 7 is a cross-sectional view of the fan cleaning device 24. At the fan cleaning device 24, the length b of the portion not contained in the fan cleaning portion 51 becomes longer than the length a of the portion contained in the support portion 50 of the fan cleaning portion 51.

FIG. 8 is a cross-sectional view showing a contact state between the fan cleaning device 24 and the indoor fan 16. FIG. 8 illustrates a state when the indoor fan 16 is cleaned by the fan cleaning unit 51. In this case, the length α of the portion of the front end side 51b of the fan cleaning portion 51 overlapping with the indoor fan 16 is longer than the base end portion 51a and the hollow portion of the fan cleaning portion 51 in the hollow portion 50b of the support portion 50. The gap length β between the long holes 50a of 50b is longer.

Next, functions and effects of the air conditioner 100 will be described. FIG. 9 is a flowchart of processing performed by the control unit 30 (refer to FIG. 2 as appropriate). In addition, in the case of "START" in FIG. 9, it is assumed that the air-conditioning operation is not performed, and the front end side 51b of the fan cleaning portion 51 is in a state facing slightly vertically downward (shown in FIGS. 5, 2, and 3). status). In step S101 of FIG. 9, the control unit 30 cleans the indoor fan 16 by the fan cleaning device 24. In addition, as a trigger for starting the cleaning of the indoor fan 16, for example, a condition that "the accumulated time of the air-conditioning operation from the previous cleaning time reaches a specific time" can be cited.

FIG. 10A is a cross-sectional view showing a state in which the indoor fan 16 is being cleaned. In addition, in FIG. 10A, the indoor heat exchanger 15, the indoor fan 16, and the receiving pan 18 are illustrated, and illustration of other components is omitted. The control unit 30 contacts the fan cleaning unit 51 with the indoor fan 16 and causes the indoor fan 16 to rotate (reverse rotation) in a direction opposite to that during normal air-conditioning operation.

That is, the control unit 30 is rotated from the front end of the fan cleaning unit 51 to a vertically downward state (refer to FIG. 5, FIG. 2, and FIG. 3), and rotates about 90 ° with the support unit 50 as a center. It is assumed that the front end of the fan cleaning unit 51 faces the indoor fan 16 (see FIG. 10A). Thereby, the fan cleaning portion 51 is in contact with the fan blades 16 a of the indoor fan 16. In addition, in the example of FIG. 10A, as indicated by a one-dot chain line L, the indoor heat exchanger 15 is located below the contact position K in a state where the fan cleaning portion 51 is in contact with the indoor fan 16. (The front-side indoor heat exchanger 15a), and a dew pan 18 is provided.

Since the indoor fan 16 is reversely rotated, the front end of the fan cleaning portion 51 is bent along with the movement of the fan blade 16a, and the fan cleaning portion 51 is pushed so as to touch the back of the fan blade 16a. Pressure. The dust accumulated at the outer end portion (the end portion in the radial direction) of the fan blade 16 a is removed by the fan cleaning portion 51. In this embodiment, as described above, the fan cleaning portion 51 is brought into contact with the fan blades 16a, and the indoor fan 16 is set to rotate in the reverse direction. As a result, the fan cleaning portion 51 comes into contact with the outer end portion of the back surface of the fan blade 16a, and the dust accumulated on the outer end portions of both the abdomen and the back surface of the fan blade 16a is integrated and removed. .

Here, since the indoor fan 16 is generally provided on the downstream side of the indoor heat exchanger 15, the interior of the indoor unit Ui has a structure that makes it difficult for a user to perform maintenance from the air outlet h4 ( figure 2). In the air-conditioning operation or the dehumidification operation, the surrounding area of the indoor fan 16 continues to be in a high humidity state, and depending on the conditions, the surface temperature of the indoor fan 16 may be lower than the dew point temperature of the surrounding air. In this way, dew condensation will occur on the surface of the indoor fan 16, and due to this dew condensation, the surrounding dust will adhere. If mold is present in the accumulated dust, it will promote the growth of the mold and make the indoor fan 16 Cleanliness is reduced, and the mycelium of mold may increase the adhesion of dust. Further, dew condensation may occur at the support portion 50 and the fan cleaning portion 51 located around the indoor fan 16, and there is a possibility that mold or rust may occur.

Therefore, in this embodiment, as shown in FIG. 5 and the like, the base end portion 51a of the fan cleaning portion 51 in the hollow portion 50b of the support portion 50 is at least lower than the supporting surface 50f, The system is set to be inclined. More specifically, the surface 50f is inclined downward toward the long hole 50a which is the exit of the fan cleaning portion 51 from the support portion 50. Therefore, it promotes the drainage of the water remaining in the hollow portion 50b from the long hole 50a, thereby reducing the moisture attached to the hollow portion 50b, the base end portion 51a, and the like, and can prevent the occurrence of mold and dust adhesion. Suppress the problem. When the support portion 50 is formed of a metal, the occurrence of rust can be suppressed.

The outer surface 51d of the base end portion 51a of the fan cleaning portion 51 in the support portion 50 and the inner surface 50c (inner peripheral surface of the hollow portion 50b) of the support portion 50 located around the outer surface 51d are oriented so that The water is inclined from the support portion 50 in a direction in which the long hole 50 a serving as an outlet of the fan cleaning portion 51 flows. At least when the operation of the fan cleaning unit 51 is stopped (the state in FIG. 5), this state is obtained. Therefore, the moisture attached to the hollow portion 50b, the long hole 50a, and the base end portion 51a is reduced, and the problem of mold generation and dust adhesion can be suppressed. When the support portion 50 is formed of a metal, the occurrence of rust can be suppressed.

Furthermore, the outer surface 50d of the support portion 50 is inclined at least when the operation of the fan cleaning device 24 is stopped (the state of FIGS. 5A and 5B). Specifically, in the example of FIG. 5A and FIG. 5B, the outer surface 50 d of the support portion 50 has an outer shape in a radial cross section that is substantially circular. Therefore, the dew condensation adhering to the outer surface 50d of the support part 50 can be made to flow easily. Therefore, it is possible to suppress the occurrence of mold and the problem of dust adhesion in the fan cleaning device 24. When the support portion 50 is formed of a metal, the occurrence of rust can be suppressed. In addition, if the outer shape of the radial cross section is slightly circular, the support portion 50 can make it difficult to hinder the flow of air generated by the indoor fan 16 compared to a case where the outer shape is complicated.

Further, the support portion 50 is independent of the long hole 50 a which is an outlet of the fan cleaning portion 51, and further includes an internal hollow portion 50 b and a support portion 50 for supporting the base end portion 51 a of the fan cleaning portion 51. A through hole 50e connected to the outside. Therefore, the water in the hollow portion 50b can be easily discharged from the through-hole 50e. In this case, at least when the operation of the fan cleaning device 24 is stopped (at the state of FIG. 5), the through-hole 50 e is opened toward the upper side than the horizontal plane. This is because, even in this case, the effect that the water in the hollow portion 50b becomes steam and is discharged can be expected.

However, ideally, the through hole 50e is inclined downward from the hollow portion 50b supporting the base end portion 51a of the fan cleaning portion 51 toward the outside of the support portion 50 in the state shown in FIG. This is because in this case, since the water in the hollow portion 50b is easily maintained in a liquid state and flows to the through-hole 50e and is discharged, the water discharge effect is high. In this case, it is preferable that the lower inner surface in the hollow portion 50b is inclined downward toward the respective through holes 50e. This is because, in this case, since the water in the hollow portion 50b tends to flow toward each of the through holes 50e, it is possible to further improve the effect of discharging water.

In addition, at least when the operation of the fan cleaning device 24 is in the state shown in FIG. 6, in order to exert the effect of the configuration of FIG. 5A, it is necessary to make the configuration of each part different from that of FIG. . For example, as shown in FIG. 6, the right side surface 50 f of the two illustrated surfaces 50 f is set to have a steeper slope than the example shown in FIG. 5A. In addition, in the longitudinal direction of the two through holes 50e shown in FIG. 6, the inclination angle is made closer to the longitudinal direction of the fan cleaning portion 51 than in the example of FIG. 5A. change.

In addition, as shown in FIG. 7, the length b of the portion not contained in the fan cleaning portion 51 becomes longer than the length a of the portion contained in the support portion 50 of the fan cleaning portion 51. This is because even if the aforementioned countermeasures are taken, it is still impossible to completely prevent moisture entering the fan cleaning device 24. That is, this is to make the length b of the portion where the problem is difficult to occur longer than the length a of the portion where the water is retained in the support portion 50 and the problem is liable to occur, such as moldy. This is a configuration in which the problem is difficult to occur at the fan cleaning device 24.

Further, as shown in FIG. 8, the length α of a portion of the front end side 51 b of the fan cleaning portion 51 that overlaps with the indoor fan 16 is larger than the base of the fan cleaning portion 51 in the hollow portion 50 b of the support portion 50. The gap length β between the end portion 51a and the long hole 50a side of the hollow portion 50b is longer. That is, in the cleaning of the indoor fan 16 caused by the fan cleaning device 24, the fan cleaning portion 51 is pushed by the indoor fan 16, and there may be an amount of gap length β that is caused to be directed into the support portion 50. The possibility of indentation. If the gap length β is too long, the length α of the portion overlapping the indoor fan 16 in the front end side 51 b of the fan cleaning unit 51 becomes zero, and cleaning becomes impossible. Therefore, the length α of the portion of the front end side 51b of the fan cleaning portion 51 overlapping with the indoor fan 16 is set to be longer than the base end portion 51a of the fan cleaning portion 51 in the hollow portion 50b of the support portion 50 and the hollow portion. The gap length β between the long holes 50a side of the portion 50b is longer.

In addition, by rotating the indoor fan 16 in the reverse direction, a slow air flow is generated inside the indoor unit Ui (see FIG. 2) in a direction opposite to that during the normal rotation (see FIG. 4). Therefore, the dust j (FIG. 10A) removed from the indoor fan 16 does not face the air outlet h4 (see FIG. 2), but instead passes through the front-side indoor heat exchanger 15 a and as shown in FIG. 10A. The space between the indoor fans 16 is guided to the receiving pan 18.

For a more detailed explanation, the dust j (FIG. 10A) removed from the indoor fan 16 by the fan cleaning unit 51 is gently pressed against the front indoor heat exchanger 15 a by the wind pressure. Further, the aforementioned dust j falls along the inclined surface (the edge of the fin f) of the front-side indoor heat exchanger 15a to the dew-receiving plate 18 (refer to the arrow in FIG. 10A). Therefore, the dust j is hardly attached to the back surface of the up-and-down wind direction board 23 (refer to FIG. 2) through a small gap between the indoor fan 16 and the exposure pan 18. This can prevent the dust j from being blown out into the room during the next air-conditioning operation. In addition, a part of the dust j removed from the indoor fan 16 may be attached to the front-side indoor heat exchanger 15a without falling onto the dew pan 18. The dust j adhering to the front-side indoor heat exchanger 15a in this manner is washed away by the processing of step S103 described later.

After the processing of step S101 in FIG. 9 is completed, in step S102, the control unit 30 moves the fan cleaning device 24. That is, the control unit 30 starts from the state where the front end of the fan cleaning unit 51 faces the indoor fan 16 (refer to FIG. 10A), and rotates the fan cleaning unit 51 by 90 ° with the support unit 50 as the center, and It is assumed that the front end of the fan cleaning portion 51 faces slightly vertically (see FIG. 10B). Next, in step S103, 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, and frosts and freezes the moisture contained in the air introduced into the indoor unit Ui onto the indoor heat exchanger 15.

When freezing the indoor heat exchanger 15, the control unit 30 desirably lowers the evaporation temperature of the refrigerant flowing into the indoor heat exchanger 15. That is, when the control unit 30 causes the indoor heat exchanger 15 to function as an evaporator and freezes the indoor heat exchanger 15 (to allow condensed water to adhere), the control unit 30 causes the indoor heat exchanger 15 to operate at a higher temperature than during normal air conditioning operation. The evaporation temperature of the refrigerant becomes lower to adjust the pressure of the refrigerant flowing into the indoor heat exchanger 15. For example, the control unit 30 causes the refrigerant having a low evaporation temperature to flow into the indoor heat exchanger 15 at a low pressure by reducing the opening degree of the expansion valve 14 (see FIG. 1). Therefore, since the frost or ice (element symbol i shown in FIG. 14B) becomes easy to grow at the indoor heat exchanger 15, it is possible to apply a large amount of water to the indoor heat exchanger in the subsequent thawing. 15 Rinse.

Also, the area located at the indoor heat exchanger 15 below the fan cleaning device 24 is preferably a downstream area that is not the flow of the refrigerant flowing through the indoor heat exchanger 15 (that is, the body (Upstream or midstream). Accordingly, since the low-temperature gas-liquid two-phase refrigerant system flows at least below (lower) the fan cleaning device 24, it is possible to increase the thickness of the frost or ice adhering to the indoor heat exchanger 15. Therefore, in the subsequent thawing, the indoor heat exchanger 15 can be rinsed with a large amount of water.

In addition, in the area located below the fan cleaning device 24 at the indoor heat exchanger 15, dust easily scraped from the indoor fan 16 by the fan cleaning device 24. Therefore, by flowing a low-temperature gas-liquid two-phase refrigerant in the area located below the fan cleaning device 24 in the indoor heat exchanger 15, frost or ice becomes easy to grow, and further, by making these The frost or ice is melted, so that the dust of the indoor heat exchanger 15 can be properly washed away.

When the indoor heat exchanger 15 functions as an evaporator and freezes the indoor heat exchanger 15 (to allow condensed water to adhere), the control unit 30 desirably uses the up-and-down air direction plate 23 (see FIG. 2). Close, or set the angle of the up-and-down wind direction board 23 to be more horizontal and upward. This suppresses leakage of low-temperature air cooled in the indoor heat exchanger 15 into the room, and enables freezing of the indoor heat exchanger 15 and the like in a comfortable state for the user. .

After the indoor heat exchanger 15 is frozen in this way (S103 in FIG. 9), the control unit 30 defrosts the indoor heat exchanger 15 (S103). For example, the control unit 30 naturally defrosts the room heat exchanger 15 at room temperature by maintaining the stopped state of each device. The control unit 30 may be configured to melt frost or ice adhered to the indoor heat exchanger 15 by performing heating operation or air supply operation. FIG. 10B is a cross-sectional view showing a state during thawing of the indoor heat exchanger 15. Because the indoor heat exchanger 15 is thawed, the frost or ice adhered to the indoor heat exchanger 15 melts and is conducted to the fin f, and a large amount of water w flows down to the dew pan 18. Thereby, the dust j adhering to the indoor heat exchanger 15 during the air-conditioning operation can be washed away.

In addition, with the cleaning of the indoor fan 16 caused by the fan cleaning section 51, the dust j attached to the front-side indoor heat exchanger 15a is also washed away and flows down to the dew pan 18 (refer to the arrow of FIG. 10B) ). The water w flowing down to the receiving pan 18 in this way is passed through the drain pipe (not shown) together with the dust j (refer to FIG. 10A) directly dropped to the receiving pan 18 during the cleaning of the indoor fan 16. It is discharged to the outside. During thawing, a large amount of water flows from the indoor heat exchanger 15 and there is almost no possibility that the drain pipe or the like (not shown) is blocked by the dust j. In addition, although omitted in FIG. 9, after the indoor heat exchanger 15 is frozen and thawed (S103), the indoor unit Ui can also be operated by causing the control unit 30 to perform heating operation or air supply operation. The inside is dry. This makes it possible to suppress the growth of bacteria in the indoor heat exchanger 15 and the like.

According to this embodiment, since the indoor fan 16 is cleaned by the fan cleaning device 24 (S101 in FIG. 9), it is possible to suppress the situation where the dust j is blown out into the room. Since the fan cleaning device 24 is disposed between the front-side indoor heat exchanger 15a and the indoor fan 16, it is possible to guide the dust j scraped off from the indoor fan 16 by the fan cleaning unit 51 to the receiver. 18 exposed pans. In the cleaning of the indoor fan 16, the control unit 30 rotates the indoor fan 16 in the reverse direction. This prevents the dust j from advancing toward the air outlet h4.

In addition, if a large amount of dust is attached to the indoor fan 16, depending on the situation, during air-conditioning operation, the air blowing temperature is set to be low in order to compensate for the performance degradation of the indoor fan 16, and indoors may occur. The possibility of dew dripping. On the other hand, in this embodiment, as described above, since the indoor fan 16 is properly cleaned, the reduction in the air volume of the indoor fan 16 caused by the adhesion of dust is suppressed. Therefore, according to this embodiment, it is possible to prevent the condensation of the indoor fan 16 caused by dust from dripping.

Further, by causing the control unit 30 to sequentially freeze and thaw the indoor heat exchanger 15 (S103 in FIG. 9), the dust j adhering to the indoor heat exchanger 15 is washed away by the water w and flows down. To the exposed pan 18. As such, according to this embodiment, the indoor fan 16 can be set to a clean state, and the indoor heat exchanger 15 can also be set to a clean state. Therefore, the air conditioner 100 can perform comfortable air conditioning. In addition, it is possible to reduce the cost of work and maintenance of the user required for cleaning the indoor heat exchanger 15 and the indoor fan 16. Example 2

FIG. 11 is a cross-sectional view of a fan cleaning device 24A of the air conditioner 100 according to the second embodiment. FIG. 11 is also the same as FIG. 5A, and shows the state of the fan cleaning device 24A at least when the operation of the fan cleaning device 24A is stopped. The difference between the second embodiment and the first embodiment is that the shape of the support portion 50A is different from the shape of the support portion 50. Since the air conditioner 100 of this embodiment is also the same as that of the first embodiment in other structures, the same component symbols are used for common components and the like, and detailed descriptions are omitted.

The outer shape of the radial direction cross section at the support portion 50 of Example 1 is slightly circular. In contrast, the outer shape of the radial direction cross section at the support portion 50A of the second embodiment is a shape that bulges in the left-right direction and also bulges in the upper side. Furthermore, the lower side also extends long toward the vertical downward direction. In the second embodiment, the shape of the support section 50A in the radial direction cross-section is the same, and when the operation of the fan cleaning section is stopped, the shape is inclined.

In the second embodiment as well, in the state of FIG. 11, the base end portion 51 a bulges to the left and right. Therefore, in the second embodiment, the thickness of the left and right portions of the support portion 50A, which is relatively large relative to the swelling of the left and right ends of the base end portion 51a, can be made thick. Therefore, the strength of the support portion 50A that supports the fan cleaning portion 51 can be increased. In addition, the thickness of the lower portion of the support portion 50A that supports the base end portion 51 a and receives the lower force from the fan cleaning portion 51 during cleaning or the like can be made thick. Therefore, at this point, the strength of the support portion 50A that supports the fan cleaning portion 51 can also be increased.

In addition, in Embodiment 2, the direction of the longitudinal direction of the fan cleaning unit 51 may be inclined at least when the operation of the fan cleaning device 24 is stopped, as in FIG. 6. In this case, as in the example of FIG. 6, the inclination of the surface 50 f or the inclination of the long-side direction of the through-hole 50 e is different from that of FIG. 11 as necessary.

As mentioned above, although the air conditioner 100 of this invention was demonstrated based on the Example, this invention is not limited to these descriptions, Various changes are possible. FIG. 12 is a cross-sectional view of an indoor unit UAI of an air conditioner according to a modification of this embodiment. In the modification shown in FIG. 12, the groove member M, which has a concave shape when viewed in a longitudinal section, is provided below the front-side indoor heat exchanger 15 a. A rib 28 extending from the bottom surface of the groove member M toward the upper side is provided at the groove member M. The other configurations are the same as those of the embodiment.

In the ditch member M shown in FIG. 12, the portion on the front side of the rib 28 functions as the exposed portion 18A that receives the condensed water from the indoor heat exchanger 15. In the groove member M, a portion on the rear side of the rib 28 functions as a dust receiving portion 29 that receives dust dropped from the indoor heat exchanger 15 and the indoor fan 16. The dust receiving portion 29 is disposed below the indoor heat exchanger 15.

Further, below the fan cleaning portion 51, an indoor heat exchanger 15 (the lower portion of the front-side indoor heat exchanger 15a) is present, and a dust receiving portion 29 is also present. Although it will be described in more detail, although not shown in the drawings, an indoor heat exchanger 15 is provided below the contact position in a state where the fan cleaning portion 51 is in contact with the indoor fan 16 and a bearing is provided. Dust section 29. Even with such a configuration, the same effects as those of the aforementioned embodiment can be exhibited.

In addition, when the indoor heat exchanger 15 is thawed, the water system drops to the dew receiving portion 18A, and the water also drops to the dust receiving portion 29. Therefore, there is no case where the discharge of the dust accumulated in the dust receiving portion 29 is hindered. In the example shown in FIG. 12, although the upper end system of the rib 28 is not in contact with the front-side indoor heat exchanger 15 a, the system is not limited to this. That is, the upper end of the rib 28 can also be brought into contact with the front-side indoor heat exchanger 15a.

FIG. 13 is a schematic perspective view of an indoor fan 16 and a fan cleaning device 24B provided in the air conditioner according to another modification of this embodiment. In the modification shown in FIG. 13, the length of the fan cleaning portion 51 in a direction parallel to the axial direction of the indoor fan 16 is shorter than the length in the axial direction of the indoor fan 16 itself. This point is different from the fan cleaning section 51 described above. The pair of bearing members 24d is a member that supports both ends of the support portion 50 as a shaft. In the cleaning of the indoor fan 16, the fan cleaning device 24A moves in the axial direction of the indoor fan 16 (the left-right direction when viewed from the front of the indoor unit). That is, in the axial direction of the indoor fan 16, the indoor fan 16 is sequentially cleaned in each of specific regions corresponding to the length of the fan cleaning device 24B. In this way, by making the fan cleaning device 24A having a relatively short length to move, the manufacturing cost of the air conditioner can be reduced compared to the aforementioned embodiment.

In addition, a rod (not shown) extending parallel to the support portion 50 may be provided near the fan cleaning device 24B (for example, above the support portion 50), and a specific moving mechanism (not shown) may be provided. (Illustrated) The fan cleaning device 24B is moved along the rod. In addition, after cleaning by the fan cleaning device 24B, the fan cleaning device 24B can be appropriately rotated or moved in parallel by a moving mechanism (not shown), and the fan cleaning device 24B can be removed from the indoor fan. 16 Avoid.

In the foregoing embodiment, the control unit 30 is configured to contact the fan cleaning device 24 with the indoor fan 16 and rotate the indoor fan 16 in a direction opposite to that during normal air-conditioning operation (reverse rotation). The description, however, is not limited to this. That is, the control unit 30 may be configured to bring the fan cleaning device 24 into contact with the indoor fan 16 and cause the indoor fan 16 to rotate (forward rotation) in the same direction as during normal air-conditioning operation.

As a result, the fan cleaning unit 51 is brought into contact with the indoor fan 16 and the indoor fan 16 is normally rotated, and the dust system attached to the vicinity of the front end of the belly of the fan blade 16a is effectively removed. In addition, since it is not necessary to provide a control circuit or a control program for reversely rotating the indoor fan 16, the manufacturing cost of the air conditioner 100 can be reduced.

In the foregoing embodiment, the configuration in which the fan cleaning unit 51 is rotated with the support portion 50 of the fan cleaning device 24 as the center has been described, but the system is not limited to this. For example, when cleaning the indoor fan 16, the control unit 30 may be configured to move the support unit 50 to the indoor fan 16 and contact the fan cleaning unit 51 with the indoor fan 16. After the cleaning of the indoor fan 16 is completed, the control unit 30 may be configured to avoid the support unit 50 and separate the fan cleaning unit 51 from the indoor fan 16.

Furthermore, in the foregoing embodiment, the indoor heat exchanger 15 has been described with respect to the structure in which the area located below the fan cleaning device 24 is not a downstream area where the refrigerant flows, but It is not limited to this. For example, in the indoor heat exchanger 15, a region higher in height than the fan cleaning device 24 may also be used. It is not a region downstream of the refrigerant flowing in the indoor heat exchanger 15 (i.e., the system As an upstream zone or midstream zone). For a more detailed description, the height of the area at the front side indoor heat exchanger 15a, which is located at the downstream side of the air flow during normal air-conditioning operation, is higher than the fan cleaning device 24, More preferably, it is not the downstream region where the refrigerant flowing in the indoor heat exchanger 15 flows. According to this configuration, the front indoor heat exchanger 15a is a region located downstream of the air flow during normal air-conditioning operation (the front indoor heat exchanger 15a shown in FIG. 2). In the area where the height of the paper surface is higher than the fan cleaning device 24, a thick frost is attached with the freezing of the indoor heat exchanger 15. If the indoor heat exchanger 15 is thawed later, it is conducted to the fin f, and a large amount of water flows down. As a result, the dust (including the dust removed from the indoor fan 16) adhering to the indoor heat exchanger 15 can be washed into the dew pan 18.

In addition, in the foregoing embodiment, the process of washing the indoor heat exchanger 15 by freezing or the like of the indoor heat exchanger 15 has been described, but the system is not limited to this. For example, the system may be configured to dew the indoor heat exchanger 15 and wash the indoor heat exchanger 15 with the dew condensation water (condensed water). 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. After that, the control unit 30 controls the opening degree and the like of the expansion valve 14 so that the temperature of the indoor heat exchanger 15 is lower than the aforementioned dew point and higher than a specific freezing temperature.

The aforementioned "freezing temperature" refers to a temperature at which moisture contained in the indoor air starts to freeze at the indoor heat exchanger 15 when the temperature of the indoor air is reduced. When the indoor heat exchanger 15 is condensed in this way, the dust of the indoor heat exchanger 15 can be washed away by the dew condensation water (condensed water). The control unit 30 may be configured to dew the indoor heat exchanger 15 by performing an air-conditioning operation or a dehumidification operation, and wash the indoor heat exchanger 15 by the dew condensation water (condensed water).

Furthermore, in the foregoing embodiment (refer to FIG. 2), although the configuration in which the indoor heat exchanger 15 and the dew pan 18 exist under the fan cleaning device 24 has been described, the system is not limited to this. That is, it is also possible to have a structure in which at least one of the indoor heat exchanger 15 and the exposure pan 18 is provided below the fan cleaning device 24. For example, in a configuration in which the lower portion of the indoor heat exchanger 15 which has a zigzag shape extends in a vertical direction when viewed in a longitudinal section, it may be located below (directly below) the fan cleaning device 24.承 露 盘 18. The exposed plate 18.

In addition, in the embodiment, although the indoor unit Ui (refer to FIG. 1) and the outdoor unit Uo (refer to the same figure) are described as a configuration in which each unit is provided, the system is not Limited to this. That is, a plurality of indoor units connected in parallel may be installed, and a plurality of outdoor units connected in parallel may be installed. In the embodiment, the wall-mounted air conditioner 100 has been described, but it can also be applied to other types of air conditioners.

It should be noted that the embodiments are described in detail for easy understanding of the present invention, and the present invention is not limited to those that include all the components described above. In addition, a part of the configuration of each embodiment may be added, deleted, or replaced with another configuration. In addition, the aforementioned institutions and structures are considered to be necessary for explanation, and not all the institutions and structures are marked on the product.

15‧‧‧ indoor heat exchanger

16‧‧‧ indoor fan

50‧‧‧Support Department

50a‧‧‧ long hole (exit)

50b‧‧‧Hollow (Internal)

50c‧‧‧ inside

50d‧‧‧ outside

50e‧‧‧through hole

50f‧‧‧face

51‧‧‧fan cleaning department

51a‧‧‧base end

51b‧‧‧front side

51d‧‧‧ outside

100‧‧‧ Air Conditioner

a‧‧‧ Length of the part of the fan cleaning section that is contained in the support section

b‧‧‧ Length of the part of the fan cleaning part which is not contained in the support part

α‧‧‧ Length of the portion of the front end of the fan cleaning section that overlaps the indoor fan

β‧‧‧Gap length

[FIG. 1] A system diagram of a refrigerant circuit of an air conditioner according to Embodiment 1 of the present invention. [Fig. 2] is a cross-sectional view of an indoor unit of an air conditioner according to Embodiment 1 of the present invention. [FIG. 3] This is a perspective view in which a part of the indoor unit of the air conditioner according to Embodiment 1 of the present invention is cut away. [Fig. 4] is a functional block diagram showing the control system of the air conditioner according to Embodiment 1 of the present invention. [FIG. 5A] A cross-sectional view of a state where the fan cleaning device of the air conditioner according to Embodiment 1 of the present invention is cut in the radial direction. [Fig. 5B] is a front view of a state where the fan cleaning device of the air conditioner according to Embodiment 1 of the present invention is cut in the radial direction. [Fig. 6] is a cross-sectional view of a fan cleaning device for an air conditioner according to Embodiment 1 of the present invention. [FIG. 7] A cross-sectional view of a fan cleaning device for an air conditioner according to Embodiment 1 of the present invention. [FIG. 8] A cross-sectional view showing the contact state between the fan cleaning device and the indoor fan of the air conditioner according to Embodiment 1 of the present invention. [Fig. 9] is a flowchart of processing executed by the control unit of the air conditioner according to Embodiment 1 of the present invention. [Fig. 10A] is a cross-sectional view showing a state during cleaning of an indoor fan of the air conditioner according to Embodiment 1 of the present invention. [FIG. 10B] A cross-sectional view showing a state in which the indoor heat exchanger of the air conditioner according to Embodiment 1 of the present invention is thawed. [FIG. 11] A cross-sectional view of a fan cleaning device for an air conditioner according to Embodiment 2 of the present invention. [FIG. 12] A cross-sectional view of an indoor unit of an air conditioner according to a modification of the embodiment of the present invention. [FIG. 13] It is a schematic perspective view of an indoor fan and a fan cleaning device provided in an air conditioner according to another modification of the embodiment of the present invention.

Claims (9)

An air conditioner, comprising: an indoor heat exchanger; and an indoor fan; and a fan cleaning section for cleaning the indoor fan; and a support section for supporting the base end portion of the fan cleaning section inside, When the operation of the fan cleaning section is stopped, the surface in the support section that supports the base end of the fan cleaning section on the lower side is inclined. The air conditioner according to item 1 of the scope of the patent application, wherein: at least when the operation of the fan cleaning section is stopped, the inner surface of the support section with the base end portion on the lower side to support the fan The long hole side penetrated by the cleaning part is inclined so that it becomes a lower side. The air conditioner according to item 1 of the scope of patent application, wherein: (1) the outer surface of the support portion is an upper surface when the operation of the fan cleaning portion is stopped, and is inclined. The air conditioner according to item 3 of the scope of patent application, wherein the outer shape of the outer surface of the support portion is slightly rounded in a radial cross section. The air conditioner according to item 1 of the scope of the patent application, wherein the support section is independent of the long hole penetrated by the fan cleaning section, and further includes an interior for supporting a base end section of the fan cleaning section. A through hole communicating with the outside. The air conditioner according to item 5 of the scope of the patent application, wherein: 运转 When the operation of the fan cleaning section is stopped, the through hole is descended from the inside of the support section supporting the base end portion of the fan cleaning section toward the outside and descending to the outside tilt. The air conditioner described in item 1 or item 2 of the scope of patent application, wherein: The fan cleaning section is longer than the section contained in the support section, which is longer than the section not contained. . The air conditioner according to item 1 or 2 of the scope of application for a patent, wherein, when the indoor fan is cleaned by the fan cleaning section, the front side of the fan cleaning section overlaps the indoor fan. The length of the portion is longer than the length of the gap between the base end portion of the fan cleaning portion inside the support portion and the exit side of the fan cleaning portion inside the support portion. The air conditioner according to item 1 or item 2 of the scope of patent application, wherein the fan cleaning unit is disposed between the indoor heat exchanger and the indoor fan.