JP6000603B2 - Air conditioner indoor unit - Google Patents

Description

  The embodiment of the present invention relates to an indoor unit of an air conditioner provided with dust removing means.

Conventionally, an indoor unit of an air conditioner includes an indoor heat exchanger, a blower for blowing air to the indoor heat exchanger to promote heat exchange, and an air filter for collecting dust contained in the blown air Is provided. In addition, a dust removing unit for removing dust collected on the air filter is provided.
Such a dust removing unit is known to remove dust collected on the air filter by moving the air filter while keeping a brush or the like in contact with the windward surface of the air filter.

  There are various means for moving the dust removing unit along the air filter. For example, there is known a mechanism for providing a moving mechanism that applies a driving force to one or both ends of the dust removing unit.

JP 2010-112595 A

  However, since the general dust removing means is held in a state where the brush or the like is in contact with the air filter or the like even in a standby state where the dust removal operation is not performed, a part of the brush or the like is contacted for a long time. Will remain. For this reason, there is a problem that the abutted portion is deformed and the dust is not normally removed when the dust removing operation is performed next. Therefore, it is necessary to provide an indoor unit of an air conditioner equipped with dust removing means that performs a good dust removing operation even after a long standby state.

The indoor unit for air-conditioning air according to an embodiment of the present invention includes a blower that sucks air into the housing and blows air, and an air filter for collecting dust is provided on the suction side of the blower. . On the windward side, there is provided dust removing means provided with a brush that is suspended in the left-right direction of the air filter and removes the dust collected on the air filter. The dust removing means is moved in the front-rear direction of the air filter by the moving means. The air filter is pressed against the brush from the opposite side of the dust removing means by the pressing means.
Further, the air filter is provided with a concave portion that is parallel to the brush across the left and right ends and has a radius of curvature larger than the outer peripheral radius of the brush, and a convex portion that is provided by projecting the concave portion upward. It is. Further, the pressing means is provided with a contact portion protruding downward from a position directly above the brush to one end portion in the front-rear direction. When the dust removing means is in the standby state position, the position of the concave portion and the brush in the front-rear direction coincide with each other , and the contact portion of the pressing means moves above the convex portion .

The longitudinal cross-sectional view of the indoor unit of the air conditioner which concerns on embodiment. The perspective view of the frame which concerns on embodiment, an air filter, and a dust removal means. The top view of the frame which concerns on embodiment, and a dust removal means. The longitudinal cross-sectional view of the dust removal means which concerns on embodiment. The block diagram of the controller of the indoor unit which concerns on embodiment. The figure which shows the state of the dust removal driving | operation which concerns on embodiment.

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 indoor unit will be described.

  The indoor unit 1 includes a casing body 11 and a decorative panel 12 that covers the lower surface of the casing body 11. In the casing body 11, an indoor heat exchanger 105, a drain pan 38, a chamber 37, a blower 39, an air filter 40, and dust removing means 50 are provided. 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 installed in a state of being inserted through the opening of the ceiling A in the installed room, and is supported by being suspended from the ceiling surface behind the ceiling.

  The decorative panel 12 is formed in a substantially rectangular plate shape in plan view, and is provided so as to cover the lower part of the casing body 11. The decorative panel 12 attached to the casing main 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 drain pan 38 is disposed above the suction chamber 37 a of the chamber 37, and the drain pan 38 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 suction port 22 and the bell mouth 25, an air filter 40 for capturing dust contained in the room air is provided. The air filter 40 is configured by bonding a fiber sheet to a substantially rectangular resin frame 41.

The air filter 40 is provided with dust removing means 50 for removing dust collected on the lower surface side of the air filter 40.
The dust removing means 50 has a rotating brush 51 for removing dust, a dust storage container 60, and a pressing means 70 for pressing the air filter 40 from above.

  The air filter 40 and the dust removing means 50 are supported by a substantially square frame 200. The frame body 200 is disposed in the suction chamber 37 a of the chamber 37.

FIG. 2 shows a top perspective view of the holding means 70 of the frame body 200, the air filter 40, and the dust removing means 50.
In the center of the frame body 200, a suction hole having substantially the same shape as the outer frame of the frame 41 is provided in order to send air sucked from the suction port 22 to the air filter 40.

The dust removing means 50 includes a rotating brush 51 that contacts the suction side of the air filter 40, and a brush drive motor 103 that rotates the rotating brush 51. A dust container 60 and an air filter 40 are provided below the rotating brush 51. A pressing means 70 is provided above the rotary brush 51 with a gap therebetween.
The rotating brush 51 includes a rod-shaped shaft portion 51a connected to the brush drive motor 103, and a brush portion 51b including a plurality of flocks provided around the shaft portion 51a (see FIG. 3).
The rotating brush 51 is provided below the air filter 40 so as to be suspended in the left-right direction.

  The holding means 70 is a flat plate member that crosses the air filter 40 to the left and right, is provided substantially parallel to the rotating brush 51, and presses the air filter 40 against the rotating brush 51 from the upper surface.

  Furthermore, moving means 80 are provided at both left and right ends of the frame body 200 and the dust removing means 50, and has a function of reciprocating the dust removing means 50 in the front-rear direction of the air filter 40.

FIG. 3 shows a top view of the frame body 200, the air filter 40, the dust removing unit 50, and the moving unit 80.
In FIG. 3, the air filter 40 is indicated by a broken line, and the pressing means 70 is not shown.

  The moving means 80 has pinion gears 82L and 82R provided on the left and right sides of the dust removing means 50. The pinion gears 82L and 82R are connected to each other by an interlocking shaft 81 and are pivotally supported by the dust removing means 50. Has been. Furthermore, rack gears 83L and 83R are provided on both the left and right sides of the air filter 40, and mesh with the pinion gears 82L and 82R. Further, a moving motor 85 for rotating the interlocking shaft 81 is provided on the left pinion gear 82L side of the interlocking shaft 81. The rotational axis of the moving motor 85 may be directly connected to the interlocking shaft 81 in order to drive the interlocking shaft 81 to rotate. A gear fixed to the interlocking shaft 81 is separately provided, It may be driven.

  The moving means 80 is configured as described above, and when the moving motor 85 is driven, the interlocking shaft 81 and the pinion gears 82L and 82R are rotationally driven to move along the rack gears 83L and 83R. As a result, the entire dust removing means 50 moves in the front-rear direction of the air filter 40.

Initial position sensors 101L and 101R are provided on the front side portions of the rack gears 83L and 83R provided on the left and right sides of the air filter 40, and a reversing sensor 102 is provided on the rear side portion of the air filter 40.
These initial position sensors 101L and 101R and the reversing sensor 102 are connected to the controller 100 (see FIG. 5), and detect whether the dust removing means 50 is in the initial position or the reversing position. For these sensors, various position sensors such as limit switches and infrared sensors may be used, but in the present embodiment, magnetic sensors are used. In this way, by using a magnetic sensor for the initial position sensor and the reversing sensor, even if fine dust is volumed in the detection part of each sensor, it will not be erroneously detected and the function as a position detection sensor will be lost. There is no.

FIG. 4 shows a longitudinal sectional view of the air filter 40 and the dust removing means 50.
As shown in FIG. 4, the cross-sectional shape of the dust collection port 60 a is formed to have an inverted octagonal mouth 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.

  The holding means 70 has the above-described width dimension L, so that the ventilation of the dust removing means 50 to the rotating brush 51 is partially blocked when air is blown by the blower 39 as in cooling operation or heating operation. Functions as a means.

The holding means 70 has a length dimension in the front-rear direction that is substantially the same as the length dimension in the front-rear direction of the dust container 60, and is disposed in parallel directly above the rotating brush 51 with the air filter 40 interposed therebetween. Further, on the lower surface of the pressing means 70, a contact portion 70a that comes into contact with the air filter 40 from the center in the front-rear direction (directly above the rotation axis of the rotating brush 51 in FIG. 4) to the rear end is provided to protrude downward. Yes. The contact portion 70 a abuts against the air filter 40, so that the air filter 40 can be pressed against the rotating brush 51.
In addition, since a gap is formed between the air filter 40 and the holding means 70 from the front-rear direction center (directly above the rotation axis of the rotating brush 51) to the other end on the front side, the dust removal means 50 around the dust removal means 50 by the blower 39 blows air. A negative pressure is generated by the flow of air.

  Further, a semi-cylindrical recess 41 a parallel to the rotating brush 51 is provided on the lower surface of the front end portion of the frame 41 of the air filter 40 across the left and right ends of the air filter 40. The radius of curvature of the recess 41 a is preferably larger than the outer radius of the dust brush 51. When the dust removing means is in the standby position on the front side, the concave portion 41a and the rotary brush 51 are in the same position in the front-rear direction so that the flocking of the brush portion 51b is not bent.

Further, the upper side of the concave portion 41a is a convex portion 41b that protrudes with respect to the pressing means 70, and when the dust removing means is in the standby state position on the front side, the pressing means 70 is pushed upward. Yes.
The rear end portion of the pressing means 70 is fixed to the dust removing means 50 by a hinge or the like so as to be movable up and down. When the dust removing means 50 is in the standby state position, The front end portion is lifted by the convex portion 41 b of the frame 41.

Thus, in the standby state, the rotating brush 51 does not come into contact with the air filter 40, so that the brushed portion of the brush portion 51b on the surface of the rotating brush 51 is not in a standby state. Thereby, the deformation of the flock can be prevented and a good dust removal operation can be maintained.
Further, when the presser means 70 is lifted by the frame 41 in the standby state position, the convex portion 41b is not pushed downward, and the frame 41 is not deformed.

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, initial position sensors 101L and 101R, a reversal sensor 102, a brush drive motor 103 and a moving motor 85, a fan motor 39a of the blower 39, and a timer as a timing unit. 107 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 means 80 is driven, and the dust removal operation is started.

  When the dust removal operation is started, the dust removal means 50 moves rearward from the standby state position, and the presser means 70 functions to deviate from the convex portion 41b and press the air filter 40 against the rotating brush 51 (FIG. 6 ( a)). The initial position sensors 101L and 101R detect that the dust removing means 50 has moved from the front end of the air filter 40.

When the dust removal operation is started by a command from the controller 100, the moving motor 85 and the brush drive motor 103 are rotated. As a result, the dust removing means 50 moves forward (FIG. 6B) toward the rear of the air filter 40 by the moving means 80, and the rotating brush 51 in contact with the lower surface of the air filter 40 rolls on the lower surface of the air filter 40. Rotate to. 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.
At this time, the dust adhering to the vicinity of the center of the rotating brush 51 is sucked to the vicinity of the outer periphery by the negative pressure in the gap between the front side of the pressing means 70 and the air filter 40, and is collected in the dust storage container 60 by the comb portion 62. Or it adheres to the lower surface of the air filter 40.

  When the dust removing means 50 reaches the rear end of the air filter 40, it is detected by the reversing sensor 102, and the rotating and moving means 80 of the rotating brush 51 is temporarily stopped by a command from the controller 100.

Thereafter, the movement motor 85 rotates in the opposite direction in accordance with a command from the controller 100, and the dust removing means 50 is moved backward by the moving means 80 toward the front of the air filter 40 (FIG. 6D). Further, the brush drive motor 103 rotates in the reverse direction, and the rotating brush 51 rotates so as to roll on the lower surface of the air filter 40.
Then, the dust adhering to the lower surface of the air filter 40 is entangled with the brush part 51 b and stored in the dust container 60.

  After the backward movement (FIG. 6 (e)), the dust removing means 50, the dust storage container 60 and the pressing means 70 are returned to the front end, the pressing means 70 is pushed up by the convex portion 41a, and the dust removing means 50 is in the standby state position. Move to. Then, it is detected by the initial position sensors 101L and 101R, the moving motor 85 is stopped by the command of the controller 100, and the moving means 80 is stopped. 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 is not performed in the indoor heat exchanger, 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 6 (e).

  As described above, in the dust removing operation as in the present embodiment, when the dust removing means 50 moves forward from the front side portion of the air filter 40 to the rear side portion, the air filter 40 and the holding means 70 front side are blown by the blower of the blower 39. A negative pressure is generated in the gap between the portions, and the dust adhering to the rotating brush 51 is easily separated, so that 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 control unit 100 counts the number of times the dust removing unit 50 has moved by the initial position sensors 101L and 101R and the reversing sensor 102, and accumulates in the dust container 60 based on the number of times the cleaning unit has moved. The amount of the dust is estimated and displayed on the controller 100 or the operation unit 106.

  Further, by providing the pressing means 70 on the upper part of the dust removing means 50, the wind flows away from the dust removing means 50 even during the operation of the blower 39, so that it adheres to the air filter 40 without being affected by the air blowing. The removed dust can be efficiently removed. Further, the dust removing means 60 presses the air filter 40 and is pressed against the pressing means 70. As a result, the rotating brush 51 can reliably come into contact with the air filter 40 and the dust adhering to the air filter 40 can be reliably scraped off. Even when the dust removing means 50 is strongly pressed against the air filter 40, it is possible to prevent the fiber sheet from being peeled off from the resinous frame of the air filter 40 by being pressed from the opposite side by the pressing means 70.

  As described above, in the air conditioner that has been operated continuously for a long time and the amount of dust attached becomes large, the dust removal operation is performed even during the cooling and heating operation in which the air is blown by the blower 39. Therefore, it is possible to suppress the performance degradation of the air conditioner due to the air filter 40 being clogged with dust.

  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

As a result, in the state where the blower 39 is blowing air, the air is blocked by the contact portion 70a on the rear side of the dust removing means 50, and the air is not blocked by the gap on the front side of the pressing means 70, and the dust is removed. Air is blown from the center of the rotating brush 51 of the means 50 to the portion facing the gap of the pressing means 70, and is not blown from the center to the portion facing the contact portion 70a.
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.

  Further, since the rotating brush 51 does not come into contact with the air filter 40 in the standby state, the flocking of the brush portion 51b on the surface of the rotating brush 51 is not bent and waits. Can be maintained.

  The indoor unit of the air conditioner is not limited to the four-way 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, the air filter 40, the dust removing means 50, and the pressing means 70 may be installed at an angle with respect to the horizontal direction or rotated by 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 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 embodiment. 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, 41 ... frame, 41a ... concave part, 41b ... convex part, 50 ... dust removing means, 51 ... rotating brush, 60 ... dust storage container, 62 ... comb part, 70 ... presser means, 80 ... Moving mechanism, 100 ... Controller, 101 ... Initial position sensor, 102 ... Reverse sensor, 103 ... Brush drive motor, 105 ... Indoor heat exchanger, 106 ... Remote control, 107 ... Timer, 200 ... Frame

Claims (2)

A blower that sucks indoor air and blows it into the room;
An air filter for collecting dust provided on the suction side of the blower;
A dust removing means provided with a brush that is suspended in the left-right direction of the air filter and removes the dust collected in the air filter;
Moving means for moving the dust removing means in the front-rear direction of the air filter;
In the indoor unit of an air conditioner equipped with
A pressing means for pressing the air filter against the brush from the dust removing means side;
The air filter is parallel to the brush, and a recess larger than the outer peripheral radius of the curvature radius the brush, the recess and the convex portion provided by projecting upward, the left and right ends of the air filter It is provided for
A contact portion that comes into contact with the air filter is provided in the presser means so as to protrude downward from directly above the brush to one end in the front-rear direction.
The air, wherein when the dust removing means is in the standby state position, the position of the concave portion and the brush are aligned in the front-rear direction , and the contact portion of the pressing means moves above the convex portion. The indoor unit of the harmony machine. When the brush is in the standby position, the outer peripheral surface of the brush overlaps without contacting the recess.
The indoor unit of the air conditioner according to claim 1.

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