JP2010065891A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for preventing the air from which dust is not removed, from moving to an indoor heat exchanger while bypassing a clearance between a filter and the indoor heat exchanger. <P>SOLUTION: In the air conditioner 1, a side plate 49 is fixed to a fixed frame 11 and closes the clearance between the indoor heat exchanger 12 and a filter cleaning section 40 at a side part of the indoor heat exchanger 12. Further the side plate 49 and a guide member 41 of the filter cleaning section 40 are screwed. As a result, the clearance between the guide member 41 and the side plate 49 is reduced, the amount of air intruding into the clearance between the indoor heat exchanger 12 and the filter cleaning section 40 without passing through the filter 21, is reduced, and the air including dust is prevented from being directly kept into contact with the indoor heat exchanger 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner having a function of automatically removing dust attached to a filter.

  2. Description of the Related Art In recent years, air conditioners with a filter cleaning function in which a filter and a brush are relatively moved in a state of facing each other and dust attached to the filter is removed are widely used (for example, see Patent Document 1). In the air conditioner described in Patent Document 1, a brush is brought into contact with a filter at a predetermined pressure, and the filter is reciprocated by a motor. A path along which the filter moves is formed in a guide member that holds the filter movably. An indoor heat exchanger is arranged leeward of the filter, and air sucked from the suction port passes through the filter and travels toward the indoor heat exchanger.

However, in the configuration as described above, the air that should essentially pass through the filter is diverted from the side of the indoor heat exchanger to the gap between the filter and the indoor heat exchanger, and the air from which dust has not been removed is the indoor heat. There is a possibility of going to the exchanger.
JP 2008-57884 A

  The subject of this invention is providing the air conditioner which suppressed that the air from which dust was not removed diverted to the clearance gap between a filter and an indoor heat exchanger, and went to an indoor heat exchanger.

  The air conditioner according to the first invention includes a heat exchanger, a fixed frame, a fan, a filter, a filter cleaning unit, and a side plate. The fixed frame fixes the heat exchanger. The fan generates an air flow through the surface of the heat exchanger. The filter is located upwind of the heat exchanger and removes dust from the air flow. The filter cleaning unit separates dust adhering to the filter from the filter. The side plate is fixed to the fixed frame, and closes the gap between the heat exchanger and the filter cleaning unit at the side of the heat exchanger and the side of the filter cleaning unit. The filter cleaning unit has a support frame that holds the filter in a predetermined position. The support frame and the side plate are directly fastened.

  In this air conditioner, since the support frame and the side plate are directly fastened, the gap between the support frame and the side plate is reduced. Therefore, the air frame does not pass through the filter and tries to enter the gap between the heat exchanger and the filter from the side. The amount of air is reduced. As a result, the dust-containing air is prevented from coming into direct contact with the heat exchanger.

  The air conditioner according to the second invention is the air conditioner according to the first invention, and the support frame is fixed to the fixed frame. In this air conditioner, since both the support frame and the side plate are fixed to the fixed frame, the support frame and the side plate are directly fastened, so that the distortion of the support frame and the side plate is forced and the occurrence of an unexpected gap is suppressed. .

  An air conditioner according to a third aspect of the present invention is the air conditioner according to the first aspect of the present invention, further comprising a grill that covers the front of the support frame. The support frame and the grill are fastened. In this air conditioner, the support frame is prevented from being displaced from a predetermined position, and the occurrence of an unexpected gap is suppressed.

  An air conditioner according to a fourth aspect of the present invention is the air conditioner according to the third aspect of the present invention, wherein the center portion of the support frame is fastened to the grill. In this air conditioner, since the center part of the support frame that is easily deformed into a concave shape is fixed to the grill, the shape of the support frame can be maintained. As a result, the occurrence of an unexpected gap is suppressed, and the occurrence of an unexpected unnecessary air flow is also suppressed.

  An air conditioner according to a fifth aspect of the present invention is the air conditioner according to the first aspect of the present invention, wherein the support frame and the side plate are screwed. In this air conditioner, since the gap between the support frame and the side plate is reduced, the amount of air that tends to enter the gap between the heat exchanger and the filter from the side without passing through the filter is reduced.

  An air conditioner according to a sixth aspect of the present invention is the air conditioner according to the first aspect of the present invention, wherein the support frame and the side plate are bonded. In this air conditioner, since the gap between the support frame and the side plate is reduced, the amount of air that tends to enter the gap between the heat exchanger and the filter from the side without passing through the filter is reduced.

  An air conditioner according to a seventh aspect is the air conditioner according to the first aspect, wherein the support frame and the side plate are welded. In this air conditioner, since the gap between the support frame and the side plate is reduced, the amount of air that tends to enter the gap between the heat exchanger and the filter from the side without passing through the filter is reduced.

  In the air conditioner according to the first aspect of the invention, the amount of air that tends to enter the gap between the heat exchanger and the filter from the side without passing through the filter is reduced, so that the air containing dust directly contacts the heat exchanger. It is suppressed.

  In the air conditioner according to the second aspect of the invention, distortion of the support frame and the side plate is forced, and the occurrence of unexpected gaps is suppressed.

  In the air conditioner according to the third aspect of the invention, the support frame is prevented from being displaced from the predetermined position, and the occurrence of an unexpected gap is suppressed.

  In the air conditioner according to the fourth aspect of the invention, the occurrence of an unexpected gap is suppressed, and the occurrence of an unexpected unnecessary air flow is also suppressed.

  In the air conditioner according to any one of the fifth to seventh inventions, since the amount of air that tries to enter the gap between the heat exchanger and the filter from the side without passing through the filter is reduced, it contains dust. Air is prevented from directly contacting the heat exchanger.

  Embodiments of the present invention will be described below with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

<Schematic configuration of air conditioner>
Embodiments of the present invention will be described below with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

  FIG. 1 is an external view of an air conditioner according to an embodiment of the present invention. In FIG. 1, an air conditioner 1 has an indoor unit 2 installed indoors and an outdoor unit 3 installed outdoor, and can perform indoor cooling and heating.

  The outdoor unit 3 includes an outdoor air conditioning unit 5 and a humidity control unit 4 disposed on the outdoor air conditioning unit 5. The humidity control unit 4 can supply outdoor air to the room or exhaust indoor air to the outside. Between the outdoor unit 3 and the indoor unit 2, the outdoor air from the humidity control unit 4 An air supply / exhaust hose 6 is provided for supplying humidity-controlled air or the like to the indoor unit 2 side or for discharging indoor air to the outside.

<Indoor unit 2>
FIG. 2 is a cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention. The indoor unit 2 is a wall-mounted indoor unit that is attached to the wall surface of the room. As shown in FIG. 2, the indoor unit 2 includes a casing 10, a frame 11, an indoor heat exchanger 12, a fan 13, a filter 21, a dust box 60, and the like. is doing.

  The casing 10 includes a grill 10a, a front panel 10b, and a back plate 10c. The grill 10 a is disposed so as to cover the filter 21. The front panel 10b is attached so as to cover the front surface of the grill 10a.

  Inside the indoor unit 2, a frame 11, an indoor heat exchanger 12, a fan 13, and a filter 21 are arranged. The indoor heat exchanger 12 and the fan 13 are attached to the frame 11. The indoor heat exchanger 12 exchanges heat with the passing air. The fan 13 blows the air taken in from the room against the indoor heat exchanger 12 and then blows it into the room.

  A blowout port 15 is provided at the lower front portion of the frame 11, and a first flap 17a, a second flap 17b, a third flap 17c, and a fourth flap 17d that guide the air blown from the blowout port 15 are blown out. It is provided in the mouth 15. Each flap can change the air guiding direction, and can open and close the outlet 15.

(Filter cleaning unit 40)
FIG. 3 is a perspective view of the filter cleaning unit. 2 and 3, the filter cleaning unit 40 is disposed between the grill 10 a and the indoor heat exchanger 12. The filter 21 is accommodated in the filter cleaning unit 40. The filter 21 removes dust contained in the air flowing toward the indoor heat exchanger 12, and the filter cleaning unit 40 automatically cleans the filter 21 to which dust has adhered, and accumulates the dust in the dust box 60. The filter cleaning unit 40 includes a roller 31 that moves the filter 21 and a guide member 41 that supports the filter 21 and the roller 31.

(Filter 21)
FIG. 4 is a perspective view of the filter and the roller. In FIG. 4, the filter 21 includes a filter portion 22 that removes dust in the air, and an edge 23 that supports the upper and lower ends, the left and right ends, and the center portion of the filter portion 22. In the present embodiment, the edge 23 is formed of an elastomer and is easily deformed by an external force, but is easily restored when the external force disappears. The material of the edge 23 is not limited to elastomer, but is selected from polymer materials such as rubber and resin. Racks 24 that mesh with gears are formed on the left and right edges 23 of the filter 21.

  The filter 21 is disposed on the upper surface side of the indoor heat exchanger 12 and removes dust from the air taken in from the room and the outdoors. Thereby, the filter 21 prevents dust floating in the air from contaminating the surface of the indoor heat exchanger 12. The filter 21 is disposed so as to cover almost the entire area on the upper surface side of the indoor heat exchanger 12 in a normal state.

(Roller 31)
The roller 31 has pinion gears 32 at both ends. Each pinion gear 32 meshes with the rack 24 of the filter 21, and the filter 21 moves up and down as the pinion gear 32 rotates. At the center of each pinion gear 32, a rotating shaft 33 protruding outward is provided, and the rotating shaft 33 is supported by a bearing of the guide member 41.

(Guide member 41)
2 and 3, the guide member 41 has a filter guide groove 42 serving as a track for moving the filter 21 and a bearing that supports the rotating shaft 33 of the pinion gear 32.

  The filter guide groove 42 includes a front guide groove 42a, a lower guide groove 42b, a rear guide groove 42c, and an upper guide groove 42d. The lengths of the front guide groove 42a and the rear guide groove 42c correspond to about two-thirds of the length in the longitudinal direction of the filter 21, and the length of the upper guide groove 42d is about three minutes in the longitudinal direction of the filter 21. This corresponds to a length of 1. The lower guide groove 42b forms an arc track coaxial with the tip circle of the pinion gear 32 described above, and connects the lower end of the front guide groove 42a and the lower end of the rear guide groove 42c. Both the upper end of the front guide groove 42a and the upper end of the rear guide groove 42c are connected to the inlet of the upper guide groove 42d. The stop position of the filter 21 is detected by a limit switch (not shown) disposed near the end of the upper guide groove 42d.

(Dust box 60)
In FIG. 2, the dust box 60 has a function of removing dust adhering to the filter 21 and temporarily storing the dust. A rotating brush 61 is disposed in the dust box 60, and the rotating brush 61 is in contact with the filter 21. The rotating brush 61 is rotationally driven by a brush drive motor (not shown).

(Filter cleaning operation)
In the indoor unit 2, the filter 21 is automatically cleaned by the control unit periodically or when necessary by the user. The mechanism will be described below.

  The rack 24 of the filter 21 is accommodated in the front guide groove 42a and the upper guide groove 42d, and one end of the rack 24 (hereinafter referred to as the first end portion 24a) is engaged with the pinion gear 32. When the roller 31 rotates, the rotation is transmitted from the pinion gear 32 to the rack 24, and the filter 21 is turned by the roller 31 in the lower guide groove 42b and is conveyed to the rear guide groove 42c side. As the roller 31 continues to rotate, the first end 24a of the rack 24 enters the upper guide groove 42d and reaches the end of the upper guide groove 42d.

  When the first end 24a of the rack 24 reaches the end of the upper guide groove 42d, the limit switch is pushed and the on operation is performed. The controller of the air conditioner determines that the first end 24a of the rack 24 has reached the end of the upper guide groove 42d from the ON signal output from the limit switch, and stops the rotation of the roller 31. At this time, the rack 24 is accommodated in the rear guide groove 42c and the upper guide groove 42d, and the other end of the rack 24 (hereinafter referred to as the second end portion 24b) is engaged with the pinion gear 32.

  When the filter 21 moves, the dust adhering to the surface of the filter 21 is scraped off by the rotating brush 61. The rotating brush 61 rotates at least during a period in which the filter 21 is moving from the front to the rear, and the rotation direction is a direction opposite to the traveling direction of the filter 21.

  When the filter 21 moves from the front to the rear and the removal of dust is completed, the control unit rotates the roller 31 in the reverse direction. Since the second end 24b of the rack 24 of the filter 21 meshes with the pinion gear 32, rotation is transmitted from the pinion gear 32 to the rack 24, and the direction of the filter 21 is changed by the roller 31 in the lower guide groove 42b. It is conveyed to the front guide groove 42a side. When the roller 31 continues to rotate backward, the second end 24b of the rack 24 enters the upper guide groove 42d and reaches the end of the upper guide groove 42d.

  When the second end 24b of the rack 24 reaches the end of the upper guide groove 42d, the limit switch is pushed and the on operation is performed. The controller of the air conditioner determines that the second end 24b of the rack 24 has reached the end of the upper guide groove 42d from the ON signal output from the limit switch, and stops the rotation of the roller 31.

(Filter bypass air flow prevention structure)
FIG. 5 is a partial perspective view of the interior of the indoor unit as viewed from the side of the indoor heat exchanger. In FIG. 5, a side plate 49 is attached to the side of the indoor heat exchanger 12. The indoor heat exchanger 12 has an inverted V shape surrounding the top of the fan 13 (see FIG. 2), and includes a heat transfer tube 12a and a plurality of fins 12b that come into contact with the heat transfer tube 12a. The fins 12b are rectangular thin plates, and are arranged in parallel at regular intervals. And the straight pipe | tube part of the U-shaped heat exchanger tube 12a penetrates the fin 12b, and the some refrigerant | coolant flow path is formed.

  The side plate 49 has a through hole 49a through which the U-shaped portion of the heat transfer tube 12a passes in order to avoid interference with the U-shaped portion of the heat transfer tube 12a. The filter cleaning unit 40 is disposed so as to cover the windward side of the indoor heat exchanger 12 and the side plate 49. As a result, the filter 21 covers the windward side of the indoor heat exchanger 12, and the guide member 41 covers the windward side of the side plate 49. The overlapping portion between the guide member 41 and the side plate 49 is fastened with a screw 99 to reduce the gap.

  Since the side plate 49 is screwed to the frame 11 and the guide member 41 is fixed to the frame 11 by the mounting claw 41g, when the guide member 41 and the side plate 49 are fixed to the frame 11, the guide member 41 and the side plate are deformed. 49, since the guide member 41 and the side plate 49 are directly fastened by the screw 99, distortion of the guide member 41 and the side plate 49 is forced, and the gap between the guide member 41 and the side plate 49 Becomes smaller.

  Therefore, the air sucked into the indoor unit 2 does not pass through the filter 21 but flows from the side of the indoor heat exchanger 12 through the gap between the guide member 41 and the side plate 49, so-called filter bypass. Air flow is unlikely to occur.

(Guide prevention structure of guide member 41)
In FIG. 3, the guide member 41 is configured to support only a part of the edge 23 (see FIG. 4) and the filter portion 22 (see FIG. 4) of the filter 21 in order not to alienate the air flow toward the filter 21. . Therefore, the warp such that the central portion in the longitudinal direction approaches the filter 21 is likely to occur. However, in the present embodiment, the guide member 41 is prevented from warping by screwing the longitudinal center portion of the guide member 41 and the center portion of the grill 10a. Specifically, a screw hole 41h (see FIG. 3) is provided at the center of the guide member 41 in the longitudinal direction, a hole (not shown) is provided at the center of the grill 10a, and the guide member 41 from the grill 10a side. Is fixed with screws. As a result, the central portion of the guide member 41 is drawn toward the front panel 10b, and the warp is eliminated.

<Modification>
In the above-described embodiment, the central portion of the guide member 41 in the longitudinal direction and the central portion of the grill 10a are screwed. However, the present invention is not limited to screwing, and may be performed by bonding, heat welding, ultrasonic welding, or the like. It is also possible to conclude.

<Features>
(1)
In the air conditioner 1, the side plate 49 is fixed to the frame 11 and closes the gap between the indoor heat exchanger 12 and the filter cleaning unit 40 at the side of the indoor heat exchanger 12. Further, the side plate 49 and the guide member 41 of the filter cleaning unit 40 are screwed. As a result, the gap between the guide member 41 and the side plate 49 is reduced, so that the amount of air that tries to enter the gap between the indoor heat exchanger 12 and the filter cleaning unit 40 without passing through the filter 21 is reduced. It is suppressed that the contained air contacts the indoor heat exchanger 12 directly.

(2)
Since the center portion of the guide member 41 is fastened to the grill 10a, the shape of the guide member 41 can be maintained. As a result, the occurrence of an unexpected gap is suppressed, and the occurrence of an unexpected unnecessary air flow is also suppressed.

  As described above, according to the present invention, since the amount of air that attempts to enter the gap between the indoor heat exchanger 12 and the filter cleaning unit 40 without passing through the filter 21 is reduced, it is useful for an indoor unit of an air conditioner. It is.

1 is an external view of an air conditioner according to an embodiment of the present invention. Sectional drawing of the indoor unit of the air conditioner which concerns on one Embodiment of this invention. The perspective view of a filter cleaning part. The perspective view of a filter and a roller. The partial perspective view inside an indoor unit seen from the side of an indoor heat exchanger.

Explanation of symbols

10a Grill 11 frame (fixed frame)
12 Indoor heat exchanger 13 Fan 21 Filter 40 Filter cleaning part 41 Guide member (support frame)
49 Side plate

Claims (7)

A heat exchanger (12);
A fixing frame (11) for fixing the heat exchanger (12);
A fan (13) for generating an air flow through the surface of the heat exchanger (12);
A filter (21) located on the windward side of the heat exchanger (12) to remove dust from the air stream;
A filter cleaning section (40) for separating the dust adhering to the filter (21) from the filter (21);
The gap between the heat exchanger (12) and the filter cleaning part (40) is fixed to the fixed frame (11), and the side of the heat exchanger (12) and the side of the filter cleaning part (40). A side plate (49) for closing at
With
The filter cleaning part (40) has a support frame (41) for holding the filter (21) in a predetermined position,
The support frame (41) and the side plate (49) are directly fastened,
air conditioner. The support frame (41) is fixed to the fixed frame (11).
The air conditioner according to claim 1. A grill (10a) covering the front of the support frame (41);
The support frame (41) and the grill (10a) are fastened,
The air conditioner according to claim 1. A center portion of the support frame (41) is fastened to the grill (10a).
The air conditioner according to claim 3. The support frame (41) and the side plate (49) are screwed,
The air conditioner according to claim 1. The support frame (41) and the side plate (49) are bonded,
The air conditioner according to claim 1. The support frame (41) and the side plate (49) are welded,
The air conditioner according to claim 1.

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