JP6754944B2 - Air conditioner - Google Patents

Description

The present invention relates to an air conditioner having a filter cleaning function that automatically cleans dust adhering to an air filter built in an indoor unit.

Conventionally, as an air conditioner of this type, for example, those disclosed in Patent Document 1 (Japanese Unexamined Patent Publication No. 2008-57883) are known.

The automatic cleaning device for an air conditioner disclosed in Patent Document 1 includes a transfer means for moving the air filter and a cleaning means for removing dust adhering to the air filter during the movement process, and the folded guide portion of the filter guide portion is provided. It is configured to include a frame having a movement path that normally communicates with the guide portion on the way.

Japanese Unexamined Patent Publication No. 2008-57883

In the air conditioner of Patent Document 1, as shown in FIG. 17, when the air filter 18 moves from the folded guide portion 20B to the normal guide portion 20A, at the confluence portion between the normal guide portion 20A and the folded guide portion 20B, A phenomenon was observed in which the rack teeth 19 provided on the air filter were caught on the filter rail 23, which led to the generation of abnormal noise and the stoppage of the air filter drive.

Therefore, an object of the present invention is to solve the above-mentioned problems and to improve the reliability of air filter drive in an air conditioner provided with an automatic cleaning device having an air filter movement path as described above. With the goal.

In order to solve the above-mentioned conventional problems, the air conditioner of the present invention is an air conditioner having a filter cleaning function for automatically cleaning dust adhering to an air filter built in an indoor unit. A transfer means for moving the filter and a cleaning means for removing dust adhering to the air filter during the movement process are provided. The transfer means comprises a filter holding portion and a filter driving device, and the filter holding portion is usually folded back with a guide portion. The air filter has a guide portion, and the folded-back guide portion communicates with the middle portion of the normal guide portion, and the communication portion divides the normal guide portion and the folded-back guide portion into a filter crosspiece. An arc-shaped rib formed with a radius equal to or larger than the pitch dimension of the teeth of the provided rack is provided in the folded-back guide portion.

According to the air conditioner of the present invention, the reliability of the air filter operation can be improved by having the above configuration.

Perspective view of the indoor unit included in the air conditioner according to the embodiment of the present invention. Sectional view of the indoor unit of FIG. Sectional drawing which shows the filter holding part which concerns on embodiment of this invention Enlarged sectional view showing the details of the filter holding portion according to the embodiment of the present invention. Perspective view showing parts related to a blade, a dust receiving part, and a dust collecting part. Cross-sectional view showing a state in which the dust receiving portion is in an upward posture. A cross-sectional view showing a state in which the dust receiving portion is in a downward posture. Side view showing parts related to the suction device It is an enlarged perspective view of the other end of the dust collecting part, and is the figure which shows the state which the opening of the discharge passage is open It is an enlarged perspective view of the other end of the dust collecting part, and is the figure which shows the state which the opening of the discharge passage is closed. Side view of parts related to the dust collection unit A1-A1 line sectional view of FIG. A2-A2 line sectional view of FIG. Perspective view showing parts related to the dust receiving part An enlarged perspective view showing a configuration around the support member of FIG. B1-B1 line sectional view of FIG. Sectional drawing which shows the problem to solve by this invention

The air conditioner of the present invention is an air conditioner having a filter cleaning function that automatically cleans dust adhering to an air filter built in an indoor unit, and is a transfer means for moving the air filter and a moving process. The air filter is provided with a cleaning means for removing dust adhering to the air filter, the transfer means comprises a filter holding portion and a filter driving device, and the filter holding portion usually has a guide portion and a folding guide portion, and the folding guide The portion communicates with the middle portion of the normal guide portion, and an arc-shaped rib is provided on the filter crosspiece that separates the normal guide portion and the folded guide portion at the communicating portion.

According to this configuration, since the arc-shaped ribs are provided in the folding guide portion of the filter crosspiece, when the air filter moves from the return path to the outward path, the teeth of the rack provided on the air filter are the arc-shaped ribs. Since the surface can be slid smoothly, it is possible to eliminate the catch between the teeth of the rack and the filter rail.

Further, the arc-shaped ribs are formed with a radius equal to or larger than the pitch dimension of the teeth of the rack provided in the air filter.

According to this configuration, when the air filter moves from the outward path to the return path, the rack teeth provided on the air filter can smoothly slide on the arcuate rib surface, so that the rack teeth and the filter crosspiece It is possible to eliminate the catching with.

(Embodiment)
The air conditioner according to the embodiment of the present invention is composed of an outdoor unit and an indoor unit connected to each other by a refrigerant pipe. FIG. 1 is a perspective view of an indoor unit of the air conditioner according to the present embodiment. FIG. 2 is a cross-sectional view of the indoor unit of FIG.

As shown in FIG. 1 or 2, the indoor unit according to the present embodiment includes a main body 2 and a movable front panel 4 that rotatably closes the front opening 2a of the main body 2. When the operation of the air conditioner is stopped, the front panel 4 is provided so as to be in close contact with the main body 2 and close the front opening 2a. On the other hand, during the air conditioning operation of the air conditioner, the front panel 4 is provided so as to move in a direction away from the main body 2 to open the front opening 2a. Note that FIGS. 1 and 2 show a state in which the front panel 4 closes the front opening 2a.

Inside the main body 2, as shown in FIG. 2, a heat exchanger 6 for heat exchange of indoor air taken in from the front opening 2a and the upper surface opening 2b, and air exchanged by the heat exchanger 6 are placed inside the main body 2. A fan 8 which is a wind source for blowing air into the room is provided. The fan 8 is, for example, a cross-flow fan, and is provided so as to blow air into the room through an air outlet 10 provided below the main body 2. Further, inside the main body 2, a vertical wind direction changing blade 12 that opens and closes the air outlet 10 and changes the air blowing direction up and down, and a left and right wind direction changing blade 14 that changes the air blowing direction left and right are provided. ing.

When the air conditioner starts the air conditioning operation, the vertical wind direction changing blades 12 are open-controlled and the air outlet 10 is opened. By driving the fan 8 in this state, indoor air is taken into the interior of the indoor unit via the front opening 2a and the upper opening 2b. The taken-in indoor air is heat-exchanged by the heat exchanger 6, passes through the fan 8, passes through the ventilation passage 16 formed on the downstream side in the blowing direction of the fan 8, and is blown out from the air outlet 10.

Further, between the front opening 2a and the upper surface opening 2b and the heat exchanger 6, an air filter 18 for removing dust contained in the indoor air taken in from the front opening 2a and the upper surface opening 2b is provided. It is provided. The air filter 18 includes a frame body portion and a net portion held by the frame body portion. The air conditioner according to the present embodiment has a filter cleaning function that automatically cleans dust adhering to the mesh portion of the air filter 18.

The air filter 18 is held by the filter holding unit 20. The filter holding portion 20 is provided with a normal guide portion 20A and a folded guide portion 20B for holding the air filter 18. The air filter 18 is usually conveyed to the guide portion 20A and the folded guide portion 20B by the filter driving device 22.

The filter drive device 22 includes a shaft 24 extending in the width direction (depth direction in FIG. 2) of the indoor unit, and a gear 26 attached to a part of the outer peripheral surface of the shaft 24. Rack teeth 19 are arranged on the air filter 18, and are mounted around the shaft 24 and engaged with the gear 26.

The air filter 18 is usually located in the guide portion 20A, and removes dust contained in the indoor air taken in from the front opening 2a and the upper surface opening 2b. When the start of cleaning of the air filter 18 is instructed, the gear 26 rotates in the forward direction (counterclockwise in FIG. 2), and the air filter 18 is normally conveyed from the guide portion 20A to the folded guide portion 20B. When the air filter 18 passes through the confluence of the folded guide portion 20B and the normal guide portion 20A and reaches the final end of the normal guide portion 20A, the gear 26 rotates in the opposite direction (clockwise in FIG. 2) and air. The filter 18 is conveyed from the folded guide portion 20B to the normal guide portion 20A.

In the present embodiment, the transport path of the air filter 18 from the normal guide section 20A to the turn-back guide section 20B is referred to as an "outward path", and the transport path of the air filter 18 from the turn-back guide section 20B to the normal guide section 20A is referred to as an "outward path". It is called "return trip".

In the vicinity of the shaft 24, a guide member 28 for guiding the air filter 18 so as to move along the circumference of the shaft 24 is provided. The guide member 28 is provided with a predetermined space with respect to the shaft 24.
Further, in the vicinity of the shaft 24, a brush 30 for removing dust adhering to the surface of the air filter 18 is provided. Below the brush 30, a blade 32 for removing dust adhering to the brush 30 is provided. The blade 32 is made of an elastic body such as rubber, preferably a flexible soft elastic body.

The base end portion of the brush 30 is held by the brush holding portion 34, which is an example of the brush moving device. The brush 30 and the brush holding portion 34 are provided so as to extend in the width direction of the indoor unit. By rotating the brush holding portion 34 around the rotation axis extending in the width direction of the indoor unit, the tip portion of the brush 30 comes into contact with the air filter 18 on the downstream side of the outward path from the guide member 28. It moves to a position where it contacts the tip of the blade 32. The dust adhering to the brush 30 when the tip of the brush 30 comes into contact with the air filter 18 is removed by the brush 30 coming into contact with the blade 32.

The base end portion of the blade 32 is held by the dust receiving portion 36 that receives the dust scraped off by the blade 32. Below the dust receiving portion 36, a dust collecting portion 38 for collecting the dust removed (scraped off) by the brush 30 and the blade 32 is provided. The blade 32, the dust receiving portion 36, and the dust collecting portion 38 are provided so as to extend in the width direction of the indoor unit.

FIG. 3 is a cross-sectional view showing a filter holding portion 20 according to an embodiment of the present invention. As shown in FIG. 3, the space near the frontage 81 of the folded-back guide portion 20B is larger than the space of the normal portion 80. More specifically, the dimension of the space in the thickness direction of the air filter is made larger than the other parts.

The space near the frontage 81 is expanded by utilizing the space of the compartment 21 that normally separates the guide portion 20A and the folded guide portion 20B.

FIG. 4 is a cross-sectional view showing a confluence portion of the normal guide portion 20A and the folded guide portion 20B. As shown in FIG. 4, the confluence portion between the normal guide portion 20A and the folded guide portion 20B is partitioned by the filter crosspiece 23. A rib 82 formed with a radius R is provided on the filter crosspiece 23 in the folded-back guide portion 20B. The radius R is set to be equal to or greater than the pitch dimension P of the rack teeth 19 provided on the air filter 18.

FIG. 5 is a perspective view showing parts related to the blade 32, the dust receiving portion 36, and the dust collecting portion 38. As shown in FIG. 5, a rotating device 40 for rotating the dust receiving portion 36 about an axis is connected to one end of the dust receiving portion 36.

FIG. 6 is a cross-sectional view showing a state in which the dust receiving portion 36 is in an upward posture. FIG. 7 is a cross-sectional view showing a state in which the dust receiving portion 36 is in a downward posture. As shown in FIGS. 6 and 7, the rotating device 40 is configured to rotate the dust receiving portion 36 around the rotating shaft 36A. The rotating device 40 rotates the dust receiving unit 36 from the upward posture shown in FIG. 6 to the downward posture shown in FIG. 7, so that the dust received by the dust receiving unit 36 is collected by the dust collecting unit 38.

The dust collecting unit 38 is provided with a step portion 38A. As shown in FIG. 6, when the dust receiving portion 36 is in the upward posture, one end portion 36B away from the rotating shaft 36A is placed on the step portion 38A, and the rotation of the dust receiving portion 36 is restricted. Further, when the dust receiving portion 36 is in the upward posture, a gap S1 is provided between the dust receiving portion 36 and the dust collecting portion 38 to allow a part of the dust removed from the air filter 18 by the brush 30 to pass through. There is. As shown in FIG. 3, the gap S1 is provided substantially vertically below the region where the air filter 18 and the brush 30 come into contact with each other.

When the dust receiving portion 36 is rotated in the downward posture by the drive of the rotating device 40, the gap S1 is closed as shown in FIG. 7, and the dust receiving portion 36 and the dust collecting portion 38 form a tubular discharge passage. 42 is configured. At this time, the blade 32 is located in the discharge passage 42. The dust collecting portion 38 has a protruding portion 38B that projects downward from the blade 32 located in the discharge passage 42. The protrusion 38B increases the distance between the blade 32 and the bottom of the dust collecting portion 38, and prevents dust from being clogged between the blade 32 and the bottom of the dust collecting portion 38.

Further, as shown in FIG. 5, a suction device 44, which is an example of a discharge device that discharges the dust collected by the dust collection unit 38 by an air flow, is connected to one end of the discharge passage 42. The suction device 44 is a device that sucks dust in the discharge passage 42. An opening 42A is provided at the other end of the discharge passage 42.

As shown in FIG. 6, the dust receiving portion 36 has a curved surface whose cross section is curved in a convex shape, and a protrusion 70 is provided at the end of the curved surface. The protrusion 70 prevents the dust collected on the curved surface from scattering when the dust receiving portion 36 rotates from the upward posture to the downward posture.

Further, as shown in FIG. 7, when the dust receiving portion 36 is in the downward posture, the inner wall surface of the dust collecting portion 38 and the dust receiving portion 36 form the first seal portion 71 and the second seal portion 72 to discharge the dust. The airtightness of the passage 42 is improved.

As shown in FIG. 7, the gap between the seal portions is wider in the second seal portion 72 than in the first seal portion 71. This is because the first seal portion 71 is formed by bringing the dust receiving portion 36 into contact with the inner wall surface of the dust collecting portion 38, and the second sealing portion 72 is the inner contact surface between the dust receiving portion 36 and the dust collecting portion 38. This is because a minute gap is provided between the two. With this configuration, the rotation operation of the dust receiving portion 36 is stopped and smooth movement is ensured.

FIG. 8 is a side view showing a part related to the suction device 44. As shown in FIG. 8, the suction device 44 includes a suction pipe 46 and a suction fan 48 that generates a suction force in the suction pipe 46. One end of the suction pipe 46 is connected to one end of the dust collecting portion 38, and the other end 46A of the suction pipe 46 is open. The other end 46A of the suction pipe 46 is connected to an exhaust hose (not shown) having one end opened to the outside so that dust passing through the suction pipe 46 can be discharged to the outside. The suction fan 48 is driven when the discharge passage 42 is formed by the dust receiving unit 36 and the dust collecting unit 38, and sucks the dust in the discharge passage 42.

Next, an example of an operation of cleaning the dust adhering to the air filter 18 will be described. During the operation of cleaning the dust adhering to the air filter 18, the dust receiving portion 36 is in an upward posture (see FIG. 6). The cleaning operation of the air filter 18 is performed under the control of a control unit (not shown).

When the gear 26 is rotated in the forward direction (counterclockwise in FIG. 2) from the state of FIG. 2, the air filter 18 is normally conveyed from the guide portion 20A to the folded guide portion 20B. When the tip of the air filter 18 passes between the brush holding portion 34 and the shaft 24, the brush holding portion 34 rotates in the positive direction (clockwise in FIG. 2), and the tip of the brush 30 becomes the air filter 18. Contact so as to straddle the tip of the brush and the mesh.

When the gear 26 is further rotated in the positive direction, the air filter 18 is further conveyed to the folded-back guide portion 20B. During this transfer, the brush holding portion 34 fixes the brush 30 at a position where it comes into contact with the air filter 18. As a result, the dust adhering to the air filter 18 is blocked by the brush 30 fixed at a fixed position, and is collected on the upstream side of the brush 30 in the transport direction of the air filter 18. At this time, the dust collected in the brush 30 and the dust adhering to the air filter 18 are entangled and gathered like a paper twist. As a result, the efficiency of removing dust adhering to the air filter 18 is improved. A part of the dust adhering to the brush 30 is scraped off into the dust collecting unit 38 through the gap S1. In order to keep the pressing force of the brush 30 on the air filter 18 constant, for example, the brush 30 may be provided with an elastic body such as a damper. As a result, the efficiency of removing dust adhering to the air filter 18 is further improved.

When the gear 26 is further rotated in the positive direction and the air filter 18 passes through the confluence of the folded guide portion 20B and the normal guide portion 20A and reaches the final end of the normal guide portion 20A, the gear 26 is rotated in the positive direction. Is stopped. At this time, a part of the rear end of the air filter 18 is stopped at the frontage 81 of the folded guide portion 20B in a curved state as shown in FIG. At least a part of the tip portion of the brush 30 is in contact with the rear end portion (frame body portion) of the air filter 18 outside the cleaning area of the air filter 18.

After that, the brush holding portion 34 is rotated in the opposite direction (counterclockwise in FIG. 2), and the brush 30 is swung at a position where it contacts the blade 32. As a result, the remaining portion of the dust adhering to the brush 30 is received in the dust collecting portion 38 and in the dust receiving portion 36 through the gap S1. At this time, not only the brush 30 but also the blade 32 may be swung. As a result, the efficiency of removing dust adhering to the brush 30 can be improved.

When the removal of dust adhering to the brush 30 by the blade 32 is completed, the brush holding portion 34 is rotated in the opposite direction, and the brush 30 returns to the position where it comes into contact with the air filter 18. After that, the gear 26 is rotated in the opposite direction, and the return path of the air filter 18 is started.

During the return transfer of the air filter 18, the brush holding portion 34 fixes the brush 30 at a position where it comes into contact with the air filter 18. As a result, the dust adhering to the air filter 18 is blocked by the brush 30 fixed at a fixed position, and is collected on the upstream side of the brush 30 in the transport direction of the air filter 18. A part of the dust adhering to the brush 30 is received by the dust receiving portion 36.

When the return path of the air filter 18 is completed, the rotation of the gear 26 in the reverse direction is stopped. After that, the brush holding portion 34 is rotated in the opposite direction (counterclockwise in FIG. 2), and the brush 30 is swung at a position where it contacts the blade 32. As a result, the remaining portion of the dust adhering to the brush 30 is received in the dust collecting portion 38 and in the dust receiving portion 36 through the gap S1. At this time, as described above, not only the brush 30 but also the blade 32 may be swung.

When the removal of dust adhering to the brush 30 by the blade 32 is completed, the cleaning operation of the air filter 18 is completed.

Next, the operation of discharging dust in the dust receiving unit 36 and the dust collecting unit 38 will be described. The dust discharge operation is performed under the control of a control unit (not shown).

When the transport of the air filter 18 on the outward path or the return path is completed, the rotating device 40 is driven, and the dust receiving portion 36 is rotated from the upward posture (see FIG. 6) to the downward posture (see FIG. 7). As a result, the dust received by the dust receiving unit 36 is collected in the dust collecting unit 38. Further, at this time, the dust receiving portion 36 and the dust collecting portion 38 form a tubular discharge passage 42.

After that, the suction fan 48 of the suction device 44 is driven, and an air flow serving as a suction force is generated in the suction pipe 46. Due to this air flow, the dust in the discharge passage 42 is discharged to the outside through the suction pipe 46. As a result, the dust discharge operation in the dust receiving unit 36 and the dust collecting unit 38 is completed.

According to the air conditioner according to the present embodiment, the dust receiving unit 36 and the dust collecting unit 38 form a tubular discharge passage 42, and the discharge passage 42 is generated with an air flow that serves as a suction force to generate dust. I try to discharge it. With this configuration, it is possible to eliminate the need to remove the dust in the dust collecting unit 38 by removing the dust collecting unit 38 from the main body 2. Therefore, it is possible to reduce the time and effort required to remove the dust in the dust collecting unit 38.

Further, according to the air conditioner according to the present embodiment, the space near the frontage 81 of the folding guide portion 20B is configured to be larger than the space of the normal portion 80. With this configuration, when the length of the air filter 18 is longer than the return length, the air filter 18 that moves the folding guide portion 20B can be curved in the frontage 81 as shown in FIG. It is possible to eliminate the tension of the filter and the portion that cannot be cleaned by the cleaning means 29.

Further, according to the air conditioner according to the present embodiment, when the space of the frontage 81 of the folding guide portion 20B is expanded, the space of the compartment 21 is used for the expansion. With this configuration, the frontage space of the folded-back guide portion 20B can be expanded without expanding the filter holding portion 20, so that the storability in the indoor unit main body is not affected.

Further, according to the air conditioner according to the present embodiment, a rib 82 having a radius R equal to or larger than the pitch dimension P of the rack teeth 19 provided on the air filter 18 is formed in the folded guide portion on the filter crosspiece 23. There is. With this configuration, it is possible to prevent the air filter 18 from being caught between the rack teeth 19 and the filter crosspiece 23, which occurs during the movement from the return route to the outward route. The rib 82 may be provided in the normal guide portion of the filter crosspiece 23. With this configuration, it is possible to prevent the rack teeth 19 and the filter crosspiece 23 from being caught when the air filter 18 moves from the outward path to the return path.

Further, according to the air conditioner according to the present embodiment, when the dust receiving portion 36 is in the upward posture, a gap S1 is provided between the dust receiving portion 36 and the dust collecting portion 38. According to this configuration, a part of the dust removed from the air filter 18 can be directly collected in the dust collecting unit 38 through the gap S1. As a result, it is possible to eliminate the need for the dust receiving unit 36 to receive all of the dust removed from the air filter 18.

Further, according to the air conditioner according to the present embodiment, the gap S1 is provided substantially vertically below the region where the air filter 18 and the brush 30 come into contact with each other. In particular, it is preferable that the gap S1 is provided on the upstream side of the brush 30 in the transport direction of the air filter 18 when the air filter 18 is transported on the outward path. According to this configuration, the amount of dust collected directly in the dust collecting unit 38 through the gap S1 can be increased.

Further, according to the air conditioner according to the present embodiment, when the suction device 44 discharges the dust in the discharge passage 42 by the air flow, the blade 32 is located in the discharge passage 42, so that the dust adhering to the blade 32 is also collected. The air flow makes it possible to remove it.

Further, according to the air conditioner according to the present embodiment, since the other end of the discharge passage 42 has the opening 42A, an air flow can be generated over substantially the entire length of the discharge passage 42, and dust in the discharge passage 42 can be generated. Removal efficiency can be improved.

If the opening 42A at the other end of the discharge passage 42 is always left open, a strong wind such as a typhoon flows into the discharge passage 42 from the suction device 44 side, flows back through the discharge passage 42, and flows from the opening 42A. It can happen to be discharged. At this time, if dust is present in the discharge passage 42, the dust may be discharged from the opening 42A. Normally, since the opening 42A is located indoors, dust will be discharged into the room. Therefore, as shown in FIGS. 9 and 10, the dust receiving portion 36 is attached so as to rotate integrally with the dust receiving portion 36, and the opening 42A is opened when the dust receiving portion 36 is in the downward posture (see FIG. 9). It is preferable to provide an on-off valve 50 that closes the opening 42A when the dust receiving portion 36 is in the upward posture (see FIG. 10). According to this configuration, the opening 42A can be opened and closed by utilizing the rotational force of the dust receiving portion 36, and it is possible to suppress the discharge of dust into the room.

Further, usually, the suction force of the suction device 44 becomes smaller as the distance from the suction device 44 increases. Therefore, it is preferable that the discharge passage 42 is configured so that the opening area becomes smaller as the distance from the suction device 44 increases. 11 is a side view of a part related to the dust collecting unit 38, FIG. 12 is a sectional view taken along line A1-A1 of FIG. 11, and FIG. 13 is a sectional view taken along line A2-A2 of FIG. As shown in FIGS. 11 to 13, the suction force at a position away from the suction device 44 can be improved by configuring the discharge passage 42 to have a smaller opening area as the distance from the suction device 44 increases. As a result, the suction force in the discharge passage 42 can be made more uniform.

Further, it is preferable that a support member 52 for supporting the dust receiving portion 36 from below is provided in the intermediate portion in the longitudinal direction of the dust collecting portion 38. 14 is a perspective view showing parts related to the dust receiving portion 36, FIG. 15 is an enlarged perspective view showing a configuration around the support member 52 of FIG. 14, and FIG. 16 is a cross section taken along line B1-B1 of FIG. It is a figure. As shown in FIGS. 14 to 16, by providing the support member 52 that supports the dust receiving portion 36 from below, it is possible to prevent the dust receiving portion 36 from bending due to the support member 52. Further, it is preferable that the support member 52 is provided above the lower end portion of the dust receiving portion 36 in the downward posture. For example, it is preferable to provide a groove portion 36C for receiving the support member 52 in the intermediate portion in the longitudinal direction of the dust receiving portion 36 so that the support member 52 is placed on the step portion 38A of the dust collecting portion 38. According to this configuration, it is possible to prevent the opening area of the discharge passage 42 from being narrowed by the support member 52. As a result, the flow of airflow in the discharge passage 42 can be smoothed, and the efficiency of removing dust in the discharge passage 42 can be improved. The dust receiving portion 36 may be divided into two members, and the two members may be connected by the groove portion 36C.

Further, when the blade 32 is held by the dust receiving portion 36, the pressure generated when the blade 32 and the brush 30 come into contact with each other is applied to the dust receiving portion 36. In this case, since the dust receiving portion 36 is a long member, the dust receiving portion 36 may be deformed. Therefore, as shown in FIG. 16, the dust receiving portion 36 has a curved surface 36D that is convexly curved in a cross section cut in the direction of rotation by the rotating device 40, and the blade 32 is the top of the curved surface 36D. It is preferable that it is provided in. According to this configuration, the strength of the dust receiving portion 36 can be improved as compared with the case where the dust receiving portion 36 has a flat plate shape.

As described above, the air conditioner according to the present invention can reduce the time and effort for removing dust in the dust collecting unit, and is therefore useful as various air conditioners including air conditioners used in ordinary households. is there.

2 Main body 2a Front opening 2b Top opening 4 Front panel 6 Heat exchanger 8 Fan 10 Air outlet 12 Vertical air direction changing blade 14 Left and right air direction changing blade 16 Ventilation passage 16A Opening 18 Air filter 19 Rack tooth 20 Filter holding part 20A Normal Guide part 20B Folded guide part 21 Section part 22 Filter drive device 23 Filter crosspiece 24 Shaft 26 Gear 28 Guide member 29 Cleaning means 30 Brush 32 Blade 34 Brush holding part 36 Dust receiving part 36A Rotating shaft 36B One end part 36C Groove part 36D Curved surface 38 Dust collection part 38A Step part 38B Projection part 40 Rotating device 42 Discharge passage 42A Opening 44 Suction device (Discharge device)
46 Suction pipe 46A The other end 48 Suction fan 50 On-off valve 52 Support member 60 Blower 62 Wind direction switching device 64 Blower pipe 64A Opening 66 On-off valve 70 Protrusion 71 1st seal 72 2nd seal 80 Normal part 81 Frontage 82 rib

Claims (2)

An air conditioner having a filter cleaning function that automatically cleans dust adhering to the air filter built in the indoor unit, and is a transfer means for moving the air filter and dust adhering to the air filter during the moving process. The transport means comprises a filter holder and a filter drive, the filter drive comprises a shaft and a gear attached to the shaft, and the air filter engages the gear. The filter holding portion has a normal guide portion and a folded-back guide portion, and the folded-back guide portion communicates with the middle portion of the normal guide portion, and the communication portion communicates with the normal guide portion. An air conditioner characterized in that ribs are provided at least in a portion of the filter crosspiece that separates the folded guide portion and the folded guide portion , and the vertical cross section of the ribs has an arc shape . The air conditioner according to claim 1, wherein the arc-shaped rib is formed with a radius equal to or larger than the pitch dimension of the teeth of the rack provided in the air filter.

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