JP2012112586A - Indoor unit of air conditioning machine - Google Patents

Abstract

【Task】
The indoor unit of an air conditioner has a large amount of dust adhering to the air filter when performing a long-time cooling or heating operation in a room that contains a lot of dust in the air. Driving will be performed. Thereby, the ventilation efficiency of an air blower falls and it leads to the performance fall of an air conditioner.
[Solution]
An indoor heat exchanger, a blower that sucks indoor air and blows it to the indoor heat exchanger, an air filter that is provided on the suction side of the blower to collect dust, and removes dust collected by the air filter The indoor unit of the air conditioner provided with the dust removing means includes a shielding means for blocking the air blowing to the dust removing means, and performs the dust removing operation of the air filter while the air is blown by the blower.
[Selection] Figure 5

Description

  Embodiments of the present invention relate to an indoor unit of an air conditioner.

  The indoor unit of the air conditioner includes an indoor heat exchanger, a blower for blowing heat to the indoor heat exchanger and promoting heat exchange, an air filter for collecting dust contained in the blown air, Dust removing means for removing dust collected on the air filter is provided.

The general dust removing means removes dust collected on the windward surface of the air filter by contacting the air filter with a rotating brush or the like.
Such a dust removal operation of the indoor unit of the air conditioner is performed in a state where the blower is stopped after the cooling operation or the heating operation is finished.

JP 2009-198156 A

However, in the indoor unit of the air conditioner as described above, when performing a long-time cooling or heating operation in a room that contains a lot of dust in the air, a large amount of dust adheres to the air filter, and the so-called air filter is clogged. In this state, cooling or heating operation is performed.
Thereby, the ventilation efficiency of an air blower falls and it leads to the performance fall of an air conditioner.

  According to an embodiment of the present invention, an indoor heat exchanger, a blower that sucks indoor air and blows it to the indoor heat exchanger, an air filter that is provided on the suction side of the blower and collects dust, and an air In the indoor unit of an air conditioner equipped with dust removing means for removing dust collected on the filter, the air filter is equipped with a shielding means for blocking air flow to the dust removing means, and the dust removal operation of the air filter while blowing with the blower I do.

The longitudinal cross-sectional view of the indoor unit which concerns on embodiment of this invention. The schematic perspective view of the dust removal means which concerns on the 1st Embodiment of this invention. The longitudinal cross-sectional view of the dust removal means which concerns on the 1st Embodiment of this invention. The schematic perspective view of the dust removal means and air filter which concern on the 1st Embodiment of this invention. The block diagram of the controller which concerns on the 1st Embodiment of this invention. Schematic of the dust removal driving | operation which concerns on the 2nd Embodiment of this invention. The lower perspective view (b) of the shielding means which concerns on the 2nd Embodiment of this invention, the upper surface perspective view of a dust removal means, an air filter, and a shielding means. Schematic of the dust removal driving | operation which concerns on the 2nd Embodiment of this invention. Schematic at the time of providing the air filter which inclined according to embodiment of this invention.

The embodiment of the present invention will be described with reference to FIGS.
(First embodiment)
In FIG. 1, the schematic of the cross section of the indoor unit 1 of the air conditioner of this embodiment is shown.
The indoor unit 1 has various forms such as a wall-mounted type and a ceiling-embedded type. In this embodiment, a ceiling-embedded four-way cassette type indoor unit will be described.

  The indoor unit 1 includes a casing body 11 and a decorative panel 12 that cover the outer surface. In the casing body 11, an indoor heat exchanger 105, a chamber 37 provided with a drain pan 38, a blower 39, an air filter 40, a dust removing means 50, a dust storage container 60, and a shielding means 70 are provided. It has been. Further, a controller 100 (see FIG. 5) for controlling the operation of the indoor unit 1 is provided. The controller 100 is connected to a remote controller 106 for a user to operate the air conditioner.

  The casing body 11 has a substantially rectangular parallelepiped shape with an open bottom, and the inner surface of the casing body 11 is covered with a heat insulating material 17. Moreover, the casing main body 11 is suspended and supported from the ceiling surface of the back of the ceiling so that the casing main body 11 is installed in a state of being inserted through the opening of the ceiling plate in the room where the lower part is installed.

  The decorative panel 12 is formed in a substantially rectangular plate shape in plan view, and is installed so as to cover the lower portion of the casing body 11. The decorative panel 12 attached to the casing body 11 is exposed to the indoor side when the indoor unit 1 is installed on the ceiling A in the room.

  The decorative panel 12 is provided with a rectangular suction port 22 at the center, and a suction grille 29 in which a plurality of slit-shaped ventilation holes 29 a are formed is fitted into the suction port 22. An elongated rectangular outlet 23 is provided around the inlet 22 so as to surround the four sides. Each air outlet 23 is provided with a wind direction adjusting plate 23a, and the air direction adjusting plate 23a is configured to rotate and adjust a wind direction (a blowing direction).

  A chamber 37 is provided above the decorative panel 12 in the casing body 11 with a seal member 19 interposed therebetween. The chamber 37 includes a suction chamber 37a that conducts air sucked from the suction port 22 and a blowout chamber 37b that conducts air blown from the blowout port.

A grooved drain pan 38 is formed on the upper portion of the suction chamber 37 a of the chamber 37, and supports the indoor heat exchanger 105.
The indoor heat exchanger 105 is formed as a plate fin tube type heat exchanger. The indoor heat exchanger 105 is formed in a square shape in a plan view, and is disposed so as to surround the blower 39 located in the central portion in the indoor unit 1. In the indoor heat exchanger 105, heat exchange is performed between the indoor air sent by the blower 39 and the refrigerant flowing in the indoor heat exchanger 105.

  The drain pan 38 is provided annularly below the indoor heat exchanger 105 in a plan view, and is configured to receive drain water generated by condensation of moisture in the air in the indoor heat exchanger 105. The drain pan 38 is provided with a drain pump (not shown) for draining drain water. The drain pan 38 is sloped so that drain water collects at the location where the drain pump is installed.

  The blower 39 includes a fan motor 39a and an impeller 39b. A bell mouth 25 is provided below the blower 39 so as to communicate with the suction port 22, and is arranged near the center of the casing body 11. The fan motor 39 a is fixed to the top plate of the casing body 11. The impeller 39b is a so-called turbo fan, and blows out the air sucked in the rotation axis direction from the suction port 22 through the bell mouth 25 in the rotation radius direction, and is connected to the rotation shaft of the fan motor 39a. Yes.

Between the bell mouth 25 and the suction port 22, an air filter 40 is provided for capturing dust contained in the room air. The air filter 40 is configured by welding a fiber sheet in a substantially square resin frame.

  A dust removing means 50 and a dust storage container 60 are provided on the lower surface side of the air filter 40, and a shielding means 70 is provided on the upper surface side.

  FIG. 2 is a perspective view of the dust removing means 50 and the dust container 60, and FIG. 3 is a longitudinal sectional view of the air filter 40, the dust removing section 50, and the shielding means 70.

As shown in FIG. 2, the dust removing unit 50 includes a rotating brush 51 and a brush drive motor 103 that rotates the rotating brush 51. The rotating brush 51 includes a rod-shaped shaft portion 51a connected to the brush drive motor 103, and a brush portion 51b made of a plurality of flocks provided around the shaft portion 51a.
The axial length of the rotating brush 51 is substantially the same as the length M of one side of the air filter 40. The rotating brush 51 is provided so as to abut on the lower surface of the air filter 40 and extend in the left-right direction.

  Further, a dust storage container 60 is provided below the dust removing means 50. The dust storage container 60 has a dust collection port 60a, a storage container 60b, and a comb portion 62 (see FIG. 3). Like the rotating brush 51, the dust storage container 60 has a length dimension M and a length dimension M so as to cross the air filter 40 in the left-right direction. The same length is formed.

As shown in FIG. 3, the cross-sectional shape of the dust collection port 60 a is such that the opening size is enlarged from the lower base end portion toward the upper opening end portion so as to surround the lower portion of the rotating brush 51.
A comb portion 62 for removing dust attached to the rotating brush 51 is provided inside the dust container 60. The comb portion 62 is provided in contact with the lower portion of the brush portion 51b, and the brush portion 51b is combed as the rotary brush 51 rotates.

On the upper surface side of the air filter 40, a flat plate-like shielding means 70 is provided that crosses the air filter 40 left and right.
The width dimension L of the shielding means 70 in the front-rear direction (direction orthogonal to the axial direction of the rotary brush 51) is the diameter R of the rotary brush 51 and the width dimension Na in the front-rear direction of the upper end opening of the dust collecting port 60a of the dust container 60. And is smaller than or substantially the same as the width dimension Nb in the front-rear direction of the storage container 60b.

  Since the shielding means 70 has the above-mentioned width dimension L, the shielding means for blocking the ventilation of the dust removing means 50 to the rotating brush 51 when air is blown by the blower 39 as in the cooling operation or the heating operation. Function as.

The shielding means 70 is parallel to the rotary brush 51 with the air filter 40 interposed therebetween, and is arranged so as to press the air filter 40 against the rotary brush 51. Thereby, the dust adhering to the air filter 40 can be reliably and efficiently removed by the brush portion 51 b of the rotary brush 51.
Here, the shielding means 70 may use various shapes and forms as long as the air filter 40 can be brought into contact with the rotating brush 51 and the ventilation to the rotating brush 51 can be blocked.

FIG. 4 is a perspective view of the air filter 40, the dust removing means 50, the dust container 60, the shielding means 70, and the moving mechanism 80.
The moving mechanism 80 has a function of reciprocally moving the dust removing unit 50, the dust storage container 60, and the shielding unit 70 in the front-rear direction of the air filter 80.

  The moving mechanism 80 includes a left driving unit 81L and a right driving unit 81R provided at both left and right ends of the air filter 40, and driving for moving the dust removing unit 50, the dust removing device 60, and the shielding unit 70 integrally. A belt connecting member 86 is provided.

  The left drive unit 81L and the right drive unit 81R respectively include front gears 82a and 82a provided on the front side portion of the air filter 40, and rear gears 82b and 82b provided on the rear side portion of the air filter 40, Drive belts 83 and 83 are looped around the front gears 82a and 82a and the rear gears 82b and 82b. The drive belts 83 and 83 each have a start end 83s and a end end 83e. The start end 83 s and the end end 83 e are fixed to the drive belt connecting member 86. Since the dust removing means 50 and the dust container 60 and the shielding means 70 are integrally attached and fixed by the drive belt connecting members 86 and 86, they move together as the belt 83 moves.

The front gear 82a of the left drive unit 81L and the front gear 82a of the right drive unit 81R are connected by a front connection shaft 84a, and the rear gear 82b of the left drive unit 81L and the rear gear 82b of the right drive unit 81R are connected to the rear side. It is connected by a connecting portion 84b.
In addition, any one of the front, rear, left, and right gears 82 is connected to the moving motor 85. Here, the rear gear 82b of the left drive unit 81L is connected to the moving motor 85.

When the moving motor 85 rotates in the rotation direction (clockwise) indicated by the solid arrow in FIG. 4, the rotation is transmitted to the rear gear 82b of the left drive unit 81L, and the right drive unit 81R via the rear connection shaft 84b. It is transmitted to the rear gear 82b on the rear side. The rotation of the rear gears 82b and 82b is transmitted to the front gears 82a and 82a via the drive belts 83 and 83, respectively, and the belt connecting members 86 and 86 provided in the middle of the drive belts 83 and 83 are located behind the air filter 40. Move towards.
When the moving motor 85 rotates in the rotation direction (counterclockwise) indicated by the broken line in FIG. 4, the shielding unit 70, the dust removing unit 50, and the dust storing unit 60 move toward the front of the air filter 40.

  An initial position sensor 101 is provided at the front side which is one end of the air filter 40, and a reversing sensor 102 is provided at the rear side which is the other end, and is connected to the controller 100. (See FIG. 5). The initial position sensor 101 and the reversing sensor 102 are sensors that detect whether the dust removing means 50, the dust storage container 60, and the shielding means 70 are located on the front side or the rear side of the air filter 40. Various position sensors such as switches and infrared sensors may be used.

  As described above, by the moving mechanism 80, the shielding unit 70, the dust removing unit 50, and the dust container 60 can be reciprocated in the front-rear direction of the air filter 40.

The operation status of the indoor unit 1 having the above-described configuration will be described.
When the cooling operation or the heating operation is performed, the fan motor 39a of the blower 39 is driven to rotate the impeller 39b. Then, room air including dust is sucked from the suction port 22 and passes from the lower surface to the upper surface of the air filter 40. At this time, dust contained in room air adheres to the lower surface of the air filter 40. The room air is sent to the indoor heat exchanger 105 through the bell mouth 25 and the impeller 39b. After the heat is exchanged by the indoor heat exchanger 105, the indoor air is blown into the room through the blowout port 23 of the indoor panel 12.

  During the cooling operation or heating operation in which air is blown by the blower 39 as described above, the dust removal operation of the air filter 40 is periodically performed.

The dust removal operation will be described with reference to FIGS.
FIG. 5 shows a block diagram of the controller 100 of the indoor unit 1. The controller 100 performs operation control of the heating operation and cooling operation of the indoor unit 1 and the filter cleaning operation.
The controller 100 includes a remote controller 106 as an operation unit, an initial position sensor 101 and a reversing sensor 102, a brush drive motor 103 and a moving motor 85, a fan motor 39a of the blower 39, and a timer 107 as a timing means. It is connected.

  The operation of the filter cleaning operation by the controller 100 will be described with reference to FIG.

  When the timer 107 detects that the fan motor 39a of the blower 39 has been driven for a predetermined time during the heating or cooling operation, the moving motor 85 of the moving mechanism 80 is driven to start the dust removal operation.

  In the initial state (FIG. 6A), the dust removing means 50, the dust container 60, and the shielding means 70 are located at the front end of the air filter 40, and the initial position sensor 101 detects that they are in the initial state. Is done.

  When the dust removal operation is started by a command from the controller 100, the brush drive motor 103 is rotated and the movement motor 85 is driven. Then, the rotating brush 51 in contact with the lower surface of the air filter 40 rotates clockwise, and the moving mechanism 80 moves the dust filter 50, the dust container 60, and the shielding means 70 forward and backward (see FIG. 6 (b)). Thereby, the dust adhering to the lower surface of the air filter 40 is entangled with the brush portion 51 b of the rotary brush 51.

  The dust entangled in the brush part 51b is removed by the comb part 62 and falls into the dust container 60 and stored.

  When the dust removing means 50, the dust storage container 60, and the shielding means 70 reach the rear end of the air filter 40, they are detected by the reversing sensor 102, and the rotating and moving mechanism 80 of the rotating brush 51 is temporarily turned on by a command from the controller 100. Stop.

  Thereafter, the brush drive motor 103 is rotated in reverse by a command from the controller 100, and the rotating brush 51 rotates counterclockwise. Further, the moving motor 85 is driven in the opposite direction, and the moving mechanism 80 causes the dust removing means 50, the dust storage container 60, and the shielding means 70 to move back toward the front of the air filter 40 (FIG. 6D). As in the forward movement, the dust adhering to the lower surface of the air filter 40 is entangled with the brush portion 51b and stored in the dust storage container 60.

  After the backward movement (FIG. 6 (e)), when the dust removing means 50, the dust container 60 and the shielding means 70 return to the initial position, the initial position sensor 101 detects the movement, and the moving motor 85 is stopped by a command from the controller 100. Then, the moving mechanism 80 stops. Thereafter, the rotating brush 51 continues to rotate for a certain period of time to remove dust attached to the brush portion 51b.

The dust removal operation as described above is performed every predetermined time during the cooling or heating operation.
Even when the cooling or heating operation is not being performed, the user can perform the dust removal operation by operating the remote controller 106. In this case, heat exchange in the indoor heat exchanger 105 is not performed, the fan motor 39a of the blower 39 is driven, and the dust removal operation is performed by the operation described with reference to FIGS. 6 (a) to (e).

  The indoor unit 1 of the present embodiment is affected by the air flow because the wind flows away from the dust removing means 50 even when the blower 39 is in operation by providing the shielding means 70 on the dust removing means 50. The dust adhering to the air filter 40 can be removed efficiently. Further, the dust removing means 60 presses the air filter 40 and is pressed against the shielding means 70.

  Thereby, the rotating brush 51 can contact the air filter 40 reliably, and the dust adhering to the air filter 40 can be scraped off reliably. Even when the dust removing means 70 is strongly pressed against the air filter 40, the fiber sheet can be prevented from being peeled from the resin frame of the air filter 40 by being pressed from the opposite side by the shielding means 70.

  As a result, in an air conditioner that has been operated continuously for a long time and the amount of attached dust is large, the dust removal operation can be performed even during cooling and heating operations in which air is blown by the blower 39. The performance degradation of the air conditioner due to dust clogging of the air filter 40 can be suppressed.

  The dust removed from the air filter 40 by the dust removal operation and spilled from the dust storage container 60 is sucked up by the blower of the blower 39 and does not fall into the room, but is removed by the next dust removal operation. The

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. In addition, about the structure similar to 1st Embodiment, it demonstrates using the same code | symbol.
Similar to the indoor unit 1 of the first embodiment, the indoor unit 1 of the second embodiment includes the casing body 11, the indoor heat exchanger 105, the blower 39, the air filter 40, the dust removing means 50, and the moving mechanism 80. It has the shielding means 70 and the controller 100 as different configurations.

  The shielding means 70 in the second embodiment partially blocks the air blowing to the rotating brush 51 of the dust removing means 50.

  FIG. 7A shows a lower perspective view of the shielding means 70 and the buffer material 70a, and FIG. 7B shows a perspective view of the air filter 40, the dust removing means 50, the dust container 60, and the shielding means 70.

As shown in FIG. 7A, the shielding means 70 is formed in a rectangular flat plate shape having a length M in the left-right direction substantially the same as the air filter 40 and having a length dimension L in the front-rear direction. Also, on the lower surface of the shielding means 70, a cushioning material 70a that contacts the air filter 40 projects downward from the center in the front-rear direction (directly above the rotation axis of the rotary brush 51 in FIG. 7B) to the rear end. Is provided.
Further, as shown in FIG. 7B, a gap is formed between the air filter 40 and the shielding means 70 from the center in the width direction (directly above the rotation axis of the rotating brush 51) to the other end on the front side. An air flow is generated by the air flow 39.

Thereby, in the state which the air blower 39 is blowing, ventilation is not interrupted | blocked by the clearance gap in the front side of the shielding means 70, but ventilation is interrupted | blocked by the shock absorbing material 70a at the back side.
Thereby, it blows to the part which faces the clearance gap between the shielding means 70 from the center of the rotating brush 51 of the dust removal means 50, and does not blow to the part which faces the shock absorbing material 70a from the center.

Further, the filter 40, the dust removing device 50, and the dust container 60 are provided with a belt connecting member 86 and a moving mechanism 80 (see FIG. 4) as in the first embodiment, and can be reciprocated back and forth at the same time. It has become.
Further, the indoor unit 1 is connected to the controller 100 by a rotary brush drive motor 85, a fan motor 39a, an initial position sensor 101, a reverse sensor 102, a moving motor 103, a timer 107, and a remote controller 106. And functions in the same manner as in the first embodiment.

The operation of the dust removal operation will be described with reference to FIG.
The dust removal operation is started in a state where the air is blown by the blower 39 as in the cooling operation or the heating operation.

  In the initial state (FIG. 8A), the dust removing means 50, the dust storage container 60, and the shielding means 70 are located at the front end of the air filter 40 and are detected by the initial position sensor 101.

When the dust removal operation is started by a command from the controller 100, the brush drive motor 103 is rotated and the movement motor 85 is driven. Then, the rotating brush 51 in contact with the lower surface of the air filter 40 rotates clockwise, and the moving mechanism 80 causes the dust removing means 50, the dust container 60, and the shielding means 70 to move forward toward the rear of the air filter 40 ( FIG. 8B). Thereby, a part of the dust adhering to the lower surface of the air filter 40 is entangled with the brush portion 51 b of the rotating brush 51.
At this time, the dust adhering to the vicinity of the center of the rotating brush 51 is collected in the dust storage container 60 by the exposing comb portion 62 due to the air flow that flows due to the negative pressure in the gap provided at the other end in the width direction of the shielding means 70. Or drop off and adhere to the lower part of the air filter.
The dust entangled in the brush part 51b is removed by the comb part 62 and falls into the dust container 60 and stored.

  When the dust removing means 50, the dust storage container 60, and the shielding means 70 reach the rear end of the air filter 40, they are detected by the reversing sensor 102, and the rotating and moving mechanism 80 of the rotating brush 51 is temporarily turned on by a command from the controller 100. Stop.

  Thereafter, the brush drive motor 103 is rotated in reverse by a command from the controller 100, and the rotating brush 51 rotates counterclockwise. Further, the moving motor 85 is driven, and the moving mechanism 80 causes the dust removing means 50, the dust storage container 60, and the shielding means 70 to move back toward the front of the air filter 40 (FIG. 8D). Then, the dust adhering to the lower surface of the air filter 40 is entangled with the brush portion 51 b and stored in the dust storage container 60.

  After the backward movement (FIG. 8 (e)), when the dust removing means 50, the dust storage container 60 and the shielding means 70 return to the initial position, the initial position sensor 101 detects the movement, and the moving motor 85 is stopped by a command from the controller 100. Then, the moving mechanism 80 stops. Thereafter, the rotating brush 51 continues to rotate for a certain period of time to remove dust attached to the brush portion 51b.

The dust removal operation as described above is performed every predetermined time during the cooling or heating operation.
Further, when the user is not in cooling or heating, the user can operate the remote controller 106 to perform the dust removal operation. In this case, heat exchange in the indoor heat exchanger is not performed, the fan motor 39a of the blower 39 is driven, and the dust removal operation is performed by the operation described with reference to FIGS. 8 (a) to (e).

  As described above, in the dust removal operation as in the present embodiment, when the dust removal means 50 moves forward from the front side portion of the air filter 40 to the rear side portion, the wind blows on the rotary brush 51 by the blower of the blower 39, Dust adhering to the rotating brush 51 is easily detached, and the dust is efficiently scraped off the comb portion 62. In the backward movement, dust attached to the air filter 40 can be efficiently removed by the rotating brush 51. Thus, there is provided an indoor unit 1 that prevents dust from accumulating on the rotating brush 51, prevents the air filter 40 from being clogged without lowering the performance of capturing the dust of the rotating brush 51, and does not lower the blowing efficiency. Can do.

  The indoor unit of the air conditioner according to the first and second embodiments is not limited to the four-direction ceiling cassette type, and may be applied to various forms in which the dust removal operation of the air filter can be performed while the air is blown by the blower. For example, in a wall-hanging indoor unit, as shown in FIG. 9, the air filter 40, the dust removing unit 50, and the shielding unit 70 may be tilted with respect to the horizontal direction or rotated 90 °. In this case, the dust storage container 60 and the dust collection port 60a may use various forms as long as dust can be collected. Further, the comb portion 62 may have a form or arrangement that can easily remove dust from the rotating brush 51.

The dust removing means 50 of the first and second embodiments uses the rotating brush 51, but a suction nozzle that sucks dust may be used, and the air filter may be circular or other forms.
When the air filter is circular, the dust removing means 50, the dust storage container 60 and the shielding means 70 are provided from the center of the air filter to the circumferential direction, and rotate around the circumference with the center of the air filter as the rotation axis. preferable.

  The present invention is not limited to the above embodiment. Furthermore, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiments of the present invention. For example, you may delete some components from all the components shown by embodiment of this invention. Furthermore, you may combine the component covering different embodiment suitably.

  DESCRIPTION OF SYMBOLS 1 ... Indoor unit, 11 ... Casing main body, 12 ... Makeup panel, 22 ... Suction port, 23 ... Air outlet, 23a ... Wind direction adjusting plate, 25 ... Bell mouth, 37 ... Chamber, 39 ... Blower, 39a ... Fan motor, 39b ... impeller, 40 ... air filter, 50 ... dust removing means, 51 ... rotating brush, 60 ... dust storage container, 62 ... comb, 70 ... shielding means, 80 ... moving mechanism, 100 ... controller, 101 ... initial position sensor DESCRIPTION OF SYMBOLS 102 ... Sensor for inversion, 103 ... Brush drive motor, 105 ... Indoor heat exchanger, 106 ... Remote control, 107 ... Timer

Claims (2)

An indoor heat exchanger,
A blower that sucks indoor air and blows it to the indoor heat exchanger;
An air filter for collecting dust provided on the suction side of the blower;
Dust removing means for removing dust collected in the air filter;
In the indoor unit of an air conditioner equipped with
A shielding means for blocking part or all of the air blowing to the dust removing means,
An indoor unit of an air conditioner, wherein a dust removing operation of an air filter is performed while air is blown by the blower.   The indoor unit of an air conditioner according to claim 1, wherein the shielding means has a function of pressing the air filter against the dust removing means.

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