JP6233400B2 - Air conditioning indoor unit - Google Patents

Description

  The present invention relates to an air conditioning indoor unit including a filter, and more particularly to an air conditioning indoor unit including a cleaning brush for cleaning a filter.

  In recent years, air-conditioning indoor units having a filter cleaning function have become widespread. For example, in the indoor unit described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2008-281230), a cylindrical brush rotates at a predetermined position, and the filter reciprocates along a predetermined trajectory while being in contact with the brush. Dust adhering to the surface is scraped off by a brush.

  However, in the mechanism as described above, it is necessary to include a drive unit that rotates the brush and a drive unit that reciprocates the filter, which is a potential factor that increases the size of the mechanism and increases the manufacturing cost.

  The subject of this invention is providing the air-conditioning indoor unit which implement | achieves size reduction of a mechanism and suppression of an increase in manufacturing cost, maintaining the performance of a filter cleaning function.

  An air conditioning indoor unit according to a first aspect of the present invention is an air conditioning indoor unit having a filter cleaning function, and includes a filter, a cleaning brush, a first housing unit, a second housing unit, and a drive unit. The filter removes dust from the passing air. The cleaning brush removes dust adhering to the filter. The first storage unit and the second storage unit store the dust removed from the filter. The drive unit causes the cleaning brush and the first storage unit to reciprocate on the filter. When the cleaning brush and the first housing portion move in the forward path, the cleaning brush removes dust from the filter and stores the dust in the first housing portion. When the cleaning brush and the first housing part move along the return path, the cleaning brush carries the dust remaining on the filter to the second housing part and accommodates it in the second housing part.

  In this air conditioning indoor unit, the dust left on the outward path can be collected on the return path, so the performance of the filter cleaning function is improved. In addition, since the filter does not move and only one drive unit moves the cleaning brush and the first storage unit, the mechanism is simple and small, and the manufacturing cost can be reduced accordingly.

  An air conditioner indoor unit according to a second aspect of the present invention is the air conditioner indoor unit according to the first aspect, wherein the cleaning brush moves in the direction of the end point of the forward path when cleaning the forward path of the filter and the start point of the forward path It advances while repeating the second movement that moves in the direction.

  In this air conditioner indoor unit, during the cleaning of the forward path, the overlapping range of at least the first movement and the second movement passes through the cleaning brush during the next first movement. It will be cleaned and dust can be prevented from being left behind.

  An air conditioning indoor unit according to a third aspect of the present invention is the air conditioning indoor unit according to the second aspect, and further includes a maintenance brush. The maintenance brush removes dust from the cleaning brush and restores the function of the cleaning brush. The maintenance brush removes dust from the cleaning brush during the second movement of the cleaning brush.

  In this air conditioning indoor unit, the cleaning brush itself is cleaned by the maintenance brush when the cleaning brush is moved second, so that the cleaning performance is recovered before the cleaning brush is switched to the next first movement, and more reliably. Dust removal can be realized.

  An air conditioning indoor unit according to a fourth aspect of the present invention is the air conditioning indoor unit according to the second aspect, and when the cleaning brush is in the first movement, takes a first posture that faces the filter within a first predetermined range. . Further, when the cleaning brush is in the second movement or in the backward movement, the cleaning brush takes a second posture that faces the filter within a second predetermined range within the first predetermined range and narrower than the first predetermined range.

  In this air conditioning indoor unit, in the second movement of the cleaning brush or the backward movement, since the cleaning brush is cleaned first by the first movement, there is little dust adhering, and the range in which the cleaning brush faces the filter is the first. There is no need to confront the first predetermined range equivalent to one movement. Therefore, the load of the driving unit is reduced by causing the cleaning brush to face the filter within the first predetermined range and within the second predetermined range narrower than the first predetermined range.

  In the air conditioner indoor unit according to the first aspect of the present invention, the dust left in the forward path can be collected in the return path, so the performance of the filter cleaning function is improved. In addition, since the filter does not move and only one drive unit moves the cleaning brush and the first storage unit, the mechanism is simple and small, and the manufacturing cost can be reduced accordingly.

  In the air conditioning indoor unit according to the second aspect of the present invention, during the cleaning of the forward path, since the cleaning brush passes through at least the first movement and the second movement during the next first movement, It will be cleaned with the cleaning brush twice or more, and it is possible to prevent dust from being left behind.

  In the air conditioning indoor unit pertaining to the third aspect of the present invention, the cleaning brush itself is cleaned by the maintenance brush when the cleaning brush is moved second, so that the cleaning brush is cleaned before switching to the next first movement. Performance is restored and more reliable dust removal can be realized.

  In the air conditioning indoor unit pertaining to the fourth aspect of the present invention, in the second movement or backward movement of the cleaning brush, since the cleaning brush is cleaned first by the first movement, there is little dust adhering, and the cleaning brush It is not necessary to confront the filter with a first predetermined range equivalent to the first movement. Therefore, the load of the driving unit is reduced by causing the cleaning brush to face the filter within the first predetermined range and within the second predetermined range narrower than the first predetermined range.

The perspective view showing the appearance of the air-conditioning indoor unit concerning one embodiment of the present invention. Sectional drawing of the air-conditioning indoor unit cut | disconnected by the II line | wire of FIG. FIG. 2 is a perspective view illustrating an appearance in a state where a front plate is removed from the air conditioning indoor unit of FIG. 1. FIG. 2 is a plan view illustrating an appearance in a state where a front plate is removed from the air conditioning indoor unit of FIG. 1. The disassembled perspective view of the assembly containing a main body frame and an air filter. The partial expansion perspective view which expanded the guide rail periphery of the left end of a main body frame. The expansion perspective view which expanded the air filter. The block diagram for demonstrating the control system of an air-conditioning indoor unit. The partial expansion perspective view which expanded a part of the left end periphery of a main body frame. The partial expansion perspective view which expanded the circumference of a pulley. The perspective view of the cleaning unit which the hair material of the cleaning brush exposed. The perspective view of the cleaning unit which narrowed the exposure range of the hair material of a cleaning brush. The partial expansion perspective view which expanded the periphery of the fixing tool with which the to-be-fixed part was fixed. FIG. 11B is a perspective view depicting the cleaning unit cut along line II-II in FIG. 11A. Sectional drawing of the cleaning unit cut | disconnected by the II-II line | wire of FIG. 11A. The conceptual diagram for demonstrating the relationship between the hair tip of a cleaning brush and a peeling brush. The perspective view which painted the external appearance of the cleaning unit which closed the dust box lid. The perspective view which painted the external appearance of the cleaning unit which opened the dust box cover. The enlarged side view which expanded the cleaning unit and the air filter. The perspective view of the cleaning unit from which the cleaning brush and the cleaning brush were removed. The perspective view of the cleaning unit from which the peeling brush and the peeling brush were removed. The partial expansion perspective view which expanded the left end part of the peeling brush. The partial expanded sectional view of the cleaning unit which painted the peeling brush periphery. The partial expansion perspective view which expanded a cleaning unit and a part of air filter. The graph for demonstrating the cleaning operation | movement of the cleaning unit at the time of normal cleaning mode. The graph for demonstrating the cleaning operation | movement of the cleaning unit at the time of careful cleaning mode. The partial expanded sectional view for demonstrating the cleaning attitude | position of a cleaning brush. The partial expanded sectional view for demonstrating the refreshing attitude | position of a cleaning brush.

  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.

(1) Outline of Configuration of Air Conditioning Indoor Unit FIG. 1 is a perspective view illustrating an appearance of an air conditioning indoor unit 10 according to an embodiment of the present invention. In FIG. 1, an air conditioner indoor unit 10 is connected to an air conditioner outdoor unit (not shown) installed outdoors in order to constitute an air conditioner. In addition, FIG. 1 depicts a state in which the air conditioning indoor unit 10 according to the embodiment is viewed obliquely from the upper right.

  FIG. 2 is a cross-sectional view of the air conditioning indoor unit 10 cut along the line II in FIG. In the following description, words indicating directions such as up, down, left, right, front (front), and back (back) are used. These directions are shown in FIG. 1 unless otherwise specified. Means the direction.

  1 and 2, the air conditioning indoor unit 10 is attached to the wall surface WL of the room RS. The surface attached to the wall surface WL of the air conditioning indoor unit 10 is the back surface (rear surface). The position of the cleaning unit 40 depicted in FIG. 2 is a standby position when the air conditioning indoor unit 10 is operating normally.

  The air conditioning indoor unit 10 includes a casing 21, an air filter 22, an indoor heat exchanger 23, an indoor fan 24, a plurality of vertical flaps 25, a plurality of horizontal flaps 26, a main body frame 27, and a bottom frame 28. The automatic cleaning mechanism 90 (refer FIG. 8) including the cleaning unit 40 is provided.

(2) Detailed configuration of air conditioning indoor unit 10 (2-1) Casing 21
The casing 21 has a rectangular parallelepiped box shape elongated in the lateral direction (left-right direction) of the air conditioning indoor unit 10. The casing 21 has a three-dimensional space surrounded by the top surface portion 11, the front plate 12, the back plate 13, the right plate 14 and the left plate 15 (see FIG. 1) of the air conditioning indoor unit 10.

  The top surface portion 11 is formed with a top surface suction port 16 for sucking room air. An arrow A in FIG. 2 represents the flow of air that is sucked into the indoor fan 24 from the top surface suction port 16 through the indoor heat exchanger 23.

  The front plate 12 constituting the front of the air conditioning indoor unit 10 has its upper end rotatably supported on the top surface portion 11 by a hinge (not shown). The right side plate 14 and the left side plate 15 constitute a right side surface and a left side surface of the air conditioning indoor unit 10, respectively (see FIG. 1).

  The back plate 13 constitutes the back surface of the air conditioning indoor unit 10 and is locked to a mounting plate (not shown) installed by screwing to the wall surface of the room.

  An air filter 22, an indoor heat exchanger 23, an indoor fan 24, a plurality of vertical flaps 25, a main body frame 27, a bottom frame 28, and an automatic cleaning mechanism 90 are accommodated in the three-dimensional space of the casing 21.

  The bottom frame 28 is fixed to the back plate 13. The bottom frame 28 supports the casing 21, the indoor heat exchanger 23, the indoor fan 24, the plurality of vertical flaps 25, the plurality of horizontal flaps 26, and the main body frame 27. The bottom frame 28 constituting the lower surface of the air conditioning indoor unit 10 is formed with an outlet 17 for blowing out conditioned air and a lower surface inlet 18 for sucking indoor air.

  The lower surface suction port 18 can be opened and closed by an opening / closing plate 29. The opening / closing plate 29 is driven by a motor M3 controlled by the control unit 60 shown in FIG.

  The lower surface suction port 18 is located between the air outlet 17 and the wall surface WL. A suction channel 28 a is formed in the bottom frame 28 upward from the lower surface suction port 18. Although not shown in FIG. 2, the outlet of the suction channel 28 a is connected to the space above the air filter 22. A broken arrow B in FIG. 2 represents the flow of indoor air sent from the lower surface suction port 18 to the indoor heat exchanger 23.

(2-2) Indoor heat exchanger 23
The indoor heat exchanger 23 includes a plurality of heat radiation fins 23a and a plurality of heat transfer tubes 23b. The indoor heat exchanger 23 is attached to the bottom frame 28 and accommodated in the casing 21. The indoor heat exchanger 23 functions as an evaporator or a condenser according to the operating state of the air conditioning indoor unit 10, and between the refrigerant flowing in the heat transfer tube 23b and the air passing between the adjacent radiating fins 23a. Let the heat exchange occur.

  As shown in FIG. 2, the indoor heat exchanger 23 has a substantially inverted V shape in which both ends are bent downward in a side view. The indoor fan 24 is located below the indoor heat exchanger 23 in a space surrounded by the indoor heat exchanger 23 having such a shape.

(2-3) Indoor fan 24
The indoor fan 24 is an elongate substantially cylindrical cross flow fan that is located inside the casing 21 and extends in the longitudinal direction (left-right direction) of the air conditioning indoor unit 10. When the indoor fan 24 is operated, an air flow that passes through the indoor fan 24 from the top to the bottom and flows from the top to the bottom of the indoor fan 24 is generated. As a result, the indoor air is sucked from the top surface suction port 16 or both the top surface suction port 16 and the bottom surface suction port 18 and passes through the indoor heat exchanger 23. An airflow indicated by a broken arrow C that is blown from the fan 24 through the blowout flow path 28b and blown from the blowout outlet 17 to the room RS is generated. The indoor fan 24 is driven by a motor M5 controlled by the control unit 60 shown in FIG.

(2-4) Bottom frame 28
The bottom frame 28 has a bottom portion 28c exposed on the lower surface. The bottom frame 28 has a flow path forming wall 28d extending upward from the bottom portion 28c, and a suction flow path 28a is formed behind the flow path forming wall 28d. A blowing channel 28b is formed in the front. The flow path forming wall 28d has a scroll shape curved along the shape of the indoor fan 24 in a sectional view. In addition, the bottom frame 28 has a tongue portion 28 e obliquely below and in front of the indoor fan 24. Before and after the indoor fan 24, a drain pan 28 f that receives condensation is provided below the indoor heat exchanger 23. The opening lower end 27a of the main body frame 27 is disposed above the bottom frame 28 around the front drain pan 28f.

  A plurality of vertical flaps 25 and a plurality of horizontal flaps 26 are rotatably attached to the bottom frame 28. The plurality of vertical flaps 25 are arranged side by side in the left-right direction, and are provided in the blow-out flow path 28b to adjust the wind direction in the left-right direction of the conditioned air to be blown out. Further, three horizontal flaps 26 are disposed downstream of these vertical flaps 25, and these horizontal flaps 26 adjust the wind direction in the vertical direction. The vertical flap 25 and the horizontal flap 26 are driven by motors M1 and M2 controlled by the control unit 60 shown in FIG.

(2-5) Main body frame 27
FIG. 3 is a perspective view illustrating the appearance of the air conditioning indoor unit 10 of FIG. 1 with the front plate 12 removed. FIG. 4 is a plan view illustrating the appearance of the air conditioning indoor unit 10 of FIG. 1 with the front plate 12 removed. FIG. 5 is an exploded perspective view of the assembly including the main body frame 27 and the air filter 22.

  The main body frame 27 is mounted on the bottom frame 28 (see FIG. 2). The indoor heat exchanger 23 and the indoor fan 24 are disposed in a space surrounded by the main body frame 27 and the bottom frame 28, while the air filter 22 is attached on the main body frame 27. The main body frame 27 includes three arch-shaped guide frames 31, 32, 33 extending in the front-rear direction, a tray-like rear connecting member 34 that connects the rear portions of the guide frames 31, 32, 33, a guide frame 31, It includes a front connecting member 35 that is long on the left and right to connect the front portions of 32 and 33, vertical bars 36 that are arranged on the left and right sides, and horizontal bars 37 that are arranged two on the front and rear sides.

  One air filter 22 is fitted into the right opening 38 surrounded by the right end guide frame 31, the center guide frame 32, the rear connecting member 34, and the front connecting member 35 (see FIG. 5). I'm stuck. Further, another air filter 22 is fitted into the left opening 39 surrounded by the left end guide frame 33, the center guide frame 32, the rear connecting member 34 and the front connecting member 35 (see FIG. 5). It is. In order to fit these air filters 22, a guide rail 31 a is provided on the left side of the right end guide frame 31, and guide rails 32 a and 32 b are provided on both the left and right sides of the center guide frame 32. A guide rail 33 a is provided on the right side of the frame 33.

  FIG. 6 is a partially enlarged perspective view in which the periphery of the guide rail 33a at the left end of the main body frame 27 is enlarged. Each of the guide rails 31a, 32a, 32b, and 33a has a C-shaped or inverted C-shaped cross section when cut along the left-right direction. A grille 19 as a decorative plate is screwed to the rear portion of the main body frame 27.

  In addition, two cleaning units 40 are slidably attached to the main body frame 27. Further, a sub dust box 50 for receiving dust spilled from the cleaning unit 40 is fixed to the front connecting member 35. The sub-dust box 50 is a box that is long on the left and right with the top opened. The cleaning unit 40 is configured to be stored in the sub dust box 50.

(2-6) Air filter 22
FIG. 7 is an enlarged perspective view in which the air filter 22 is enlarged. In FIG. 7, the air filter 22 has a frame body composed of vertical frames 22a and 22b that are arranged on the left and right and extend in the front-rear direction, a horizontal frame 22c that is arranged in the front, and a horizontal frame 22d that is arranged in the rear. Yes. Two vertical bars 22e and four horizontal bars 22f are formed in an area surrounded by the vertical frames 22a and 22b and the horizontal frames 22c and 22d. A filter body 22g is formed in a region surrounded by the vertical frames 22a and 22b, the horizontal frames 22c and 22d, the vertical beam 22e, and the horizontal beam 22f. The filter body 22g is, for example, a net made of resin yarn. The vertical frames 22a and 22b, the horizontal frames 22c and 22d, the vertical beam 22e, and the horizontal beam 22f are also made of resin and are integrally formed with the filter body 22g.

  The horizontal frame 22c in front of the air filter 22 is formed with two grooves 22h that are elongated to the left and right. For example, when the right air filter 22 is attached to the main body frame 27, the vertical frames 22a and 22b are inserted into the guide rail 31a of the right end guide frame 31 and the right guide rail 32a of the center guide frame 32, respectively, and pushed in. The horizontal frame 22d is inserted into the rear connecting member 34.

  The air filter 22 inserted to the back of the main body frame 27 is fixed by the groove 22h being hooked on the two claws 35a formed on the front connecting member 35 of the main body frame 27. Further, the sub dust box 50 is fixed to the main body frame 27 so that the claws are not removed from the groove 22 h, and the air filter 22 is pressed against the main body frame 27 by the sub dust box 50.

  On the vertical frames 22a and 22b of the air filter 22, a large number of convex portions 22j are formed in a line in the front-rear direction at regular intervals. The rubber tongue 41 (see FIG. 14A) of the cleaning unit 40 abuts against the protrusions 22j, or the rubber tongue 41 is moved over (see FIGS. 25A and 25B). The tongue member 41, which is a protrusion, has an elastic piece 41c and a base 41b. The base 41 b is attached to the rotating member 43 a of the cleaning brush 43. The tip 41a of the tongue member 41 is also the tip of the elastic piece 41c.

(2-7) Outline of Automatic Cleaning Mechanism 90 The automatic cleaning mechanism 90 includes a cleaning unit 40 and a sub dust box 50. The cleaning unit 40 is driven by a unit drive motor M4 shown in FIG. The unit drive motor M4 is, for example, a stepping motor, and the moving distance is controlled by the number of pulses of the pulse signal transmitted from the control unit 60. Such a unit drive motor M4 is also a device included in the automatic cleaning mechanism 90.

  The control sequence of the cleaning unit 40 by the control unit 60 is stored in the memory 62. Cleaning by the automatic cleaning mechanism 90 is performed based on a command from the remote controller 61 or automatically based on the determination of the control unit 60 according to a control sequence stored in the memory 62.

  FIG. 9 is a partially enlarged perspective view in which a part around the left end of the main body frame 27 is enlarged. In FIG. 9, a unit drive motor M <b> 4 is attached to the left side of the main body frame 27.

  FIG. 10 is a partially enlarged perspective view in which the periphery of the pulley 92 is enlarged. As shown in FIG. 10, the rotary shaft 91 is rotationally driven by the unit drive motor M4. A pulley 92 is attached to the rotation shaft 91. A wire 93 is wound around the pulley 92.

  Both ends of the wire 93 are attached to the fixture 94 and connected in an annular shape. Therefore, when the unit drive motor M4 is driven, the wire 93 connected in an annular shape moves on a predetermined annular track along the main body frame 27. As the wire 93 moves, the fixture 94 also moves along the guide frames 31, 32, 33 of the main body frame 27. The fixing tool 94 is an instrument for fixing the fixed part 42 protruding from both ends of the cleaning unit 40. The fixed portion 42 is fixed by a leaf spring 98.

  In order to increase the fixing force, rubber is attached to the surface of the fixed portion 42. Therefore, the cleaning unit 40 fixed to the fixing tool 94 moves along with the movement of the wire 93 together with the fixing tool 94 as the unit driving motor M4 is driven. The wire 93 may be provided with a structure for preventing slipping. For example, a structure in which a thin steel wire is wound around and fixed in a spiral shape may be provided.

  FIG. 11A is a perspective view of the cleaning unit 40 with the hair material 44 of the cleaning brush 43 exposed. FIG. 11B is a perspective view of the cleaning unit 40 in which the exposed range of the bristle material 44 of the cleaning brush 43 is narrowed. 11A and 11B show a state where the cleaning unit 40 shown in FIG. 5 is viewed from the back side.

  A cleaning brush 43 is rotatably attached to the cleaning unit 40. When cleaning the air filter 22, the bristle material 44 (see FIG. 13) of the cleaning brush 43 contacts the air filter 22. FIG. 12 shows a state in which the fixed portion 42 of the cleaning unit 40 is fitted into the fixture 94.

(3) Details of Automatic Cleaning Mechanism 90 (3-1) Details of Configuration of Cleaning Unit 40 FIG. 13 is a perspective view depicting the cleaning unit 40 cut along line II-II in FIG. 11A. 14A is a cross-sectional view of the cleaning unit 40 cut along the line II-II in FIG. 11A. FIG. 14B is a conceptual diagram for explaining the relationship between the hair tips of the cleaning brush 43 and the peeling brush 47.

  Further, FIG. 15 is a perspective view depicting the appearance of the cleaning unit 40 with the dust box lid 46 closed, from the side opposite to the side where the cleaning brush 43 shown in FIGS. 11A and 11B is disposed. The seen cleaning unit 40 is shown. FIG. 16 is a perspective view illustrating the appearance of the cleaning unit 40 with the dust box lid 46 opened.

  15 and 16, the cleaning unit 40 includes a dust box base member 45 and a dust box lid 46 that can be opened and closed with a hinge 45a as a center of rotation. In the cleaning unit 40, a recovery space CS for storing dust surrounded by the dust box base member 45 and the dust box lid 46 is formed. That is, the cleaning unit 40 also has a function as a dust box.

  FIG. 17 is an enlarged side view in which the cleaning unit 40 and the air filter 22 are enlarged. In FIG. 17, the cleaning unit 40 moves the first side surface 40 a toward the rear of the air conditioning indoor unit 10 and the second side surface 40 b toward the front of the air conditioning indoor unit 10.

  The cleaning brush 43 attached to the cleaning unit 40 is disposed closer to the first side surface 40a than to the second side surface 40b. As shown in FIG. 14A, the cleaning brush 43 has a surface with a substantially arc-shaped cross section, and a bristle material 44 is fixed to a rotating member 43a that extends long in the left-right direction with, for example, an adhesive. Has been.

  FIG. 18 is a perspective view of the cleaning brush 43 and the cleaning unit 40 with the cleaning brush 43 removed. In FIG. 18, rotating shafts 43b protrude from the left and right ends of the rotating member 43a. The rotating shaft 43 b is fitted into the first bearing 45 b of the dust box base member 45. That is, the cleaning brush 43 is configured to be able to rotate around a rotation center extending long in the left and right directions in parallel with the front connection member 35 and the rear connection member 34 of the main body frame 27.

  FIG. 19 is a perspective view of the cleaning unit 40 with the peeling brush 47 and the peeling brush 47 removed. In FIG. 19, a peeling brush 47 is attached to the inside of the cleaning unit 40 so as to face the cleaning brush 43. The hair material 48 is also fixed to the peeling brush 47 with an adhesive, for example. With such a configuration, the cleaning brush 43 rubs the bristle material 44 fixed to the cleaning brush 43 against the bristle material 48 fixed to the peeling brush 47 and removes dust removed from the air filter 22 by the bristle material 44. Scrape into the cleaning unit 40.

  The peeling brush 47 is urged by a torsion spring 49 so that the hair material 48 fixed to itself is pressed against the hair material 44 in order to improve the performance of scraping dust from the hair material 44 of the cleaning brush 43. . Further, a rotating shaft 47a and a bearing 47b are provided so that the torsion spring 49 can be rotated. The rotating shaft 47 a of the peeling brush 47 is fitted into the second bearing 45 c of the dust box base member 45. Further, the rotating shaft 45 d of the dust box base member 45 is fitted into the bearing 47 b of the peeling brush 47.

  FIG. 20 is a partially enlarged perspective view in which the left end portion of the peeling brush 47 is enlarged. In FIG. 20, a torsion spring 49 is fitted into the rotation shaft 47 a of the peeling brush 47, and one end of the torsion spring 49 is hooked on the main body 47 c of the peeling brush 47.

  FIG. 21 is a partially enlarged cross-sectional view of the cleaning unit 40 depicting the periphery of the peeling brush 47. In FIG. 21, the other end of the torsion spring 49 is pressed against the wall of the dust box base member 45. With such a configuration, the bristle material 48 of the peeling brush 47 is urged toward the side opposite to the first side surface 40a of the cleaning unit 40. In the state shown in FIGS. 13 and 14A, the hair brush 44 fixed to the cleaning brush 43 and the hair material 48 fixed to the peeling brush 47 are kept in contact with each other, whereby the cleaning brush 43 and the peeling brush are maintained. 47 is configured so that a gap does not occur between them.

  As shown in FIG. 14B, the shape of the hair tip 44a of the bristle material 44 is formed so that the cross-section becomes an arc around the center line 44c, and the shape of the hair tip 48a of the hair material 48 is formed. Is formed so that the cross section is circular around the center line 48c. In order not only to prevent gaps from occurring, but also to prevent dust peeled off by the peeling brush 47 from spilling out of the cleaning unit 40, the center lines 44c and 48c are shifted and the hair tips 44a and 48a are The cleaning unit 40 is configured to partially overlap in the back.

  Further, as indicated by an arrow D, the bristle material 44 is inclined such that the tip thereof is inclined toward the first side surface 40a with respect to the radial line coming out from the center line 44c. As indicated by the arrow E, the bristle material 48 is inclined so that the tip thereof faces the dust box lid with respect to the radial line extending from the center line 48c.

  The cleaning unit 40 is connected to the cleaning brush 43 by a rubber tongue 41 for rotating the cleaning brush 43 for refreshing. 11A shows a state in which the tongue member 41 has fallen toward the second side face 40b of the cleaning unit 40, and FIG. 11B shows a state in which the tongue member 41 has fallen toward the first side face 40a of the cleaning unit 40. It is shown. When the tongue member 41 falls toward the second side surface 40b, the cleaning brush 43 rotates in a direction to expose the bristle material 44. The posture that the cleaning brush 43 takes in the state of FIG. 11A is the cleaning posture.

  On the contrary, when the tongue member 41 falls toward the first side surface 40a, the cleaning brush 43 rotates in a direction in which a part of the bristle material 44 is housed in the cleaning unit 40 and the exposed range of the bristle material 44 is narrowed. And in the state of FIG. 11B, the back surface 43c of the rotation member 43a shown by FIG. 13 is exposed facing outward. In a state where a part of the back surface 43c of the rotating member 43a is exposed, a part of the hair material 44 of the cleaning brush 43 is stored in the cleaning unit 40 in order to scrape off the dust of the cleaning brush 43. The posture that the cleaning brush 43 takes when the exposure range 44 is narrowed is the refresh posture.

(3-2) Operation of automatic cleaning mechanism 90 (3-2-1)
When the control unit 60 shown in FIG. 8 performs control to clean the air filter 22, the operation of the indoor fan 24 is stopped by the control unit 60. After the operation of the indoor fan 24 stops, the control unit 60 drives the unit drive motor M4 of the automatic cleaning mechanism 90.

  Before the automatic cleaning mechanism 90 starts cleaning, the cleaning unit 40 stands by in the sub dust box 50 as shown in FIG. In FIG. 3, a state where the right cleaning unit 40 has moved to the back side is also indicated by a two-dot chain line for convenience of explanation. As described above, the cleaning unit 40 waiting in front of the air conditioning indoor unit 10 cleans the air filter 22 while moving from the front to the rear of the air conditioning indoor unit 10.

  The range in which the cleaning unit 40 cleans the air filter 22 is from the front end 22m to the rear end 22n of the filter body 22g of the air filter 22 shown in FIG. At this time, the cleaning unit 40 moves in an area Ar1 indicated by an arrow in FIG. In FIG. 4, a state where the right cleaning unit 40 has moved to the back side is also indicated by a two-dot chain line for convenience of explanation.

  In the air conditioning indoor unit 10, the air filter 22 is cleaned by the cleaning brush 43 when the cleaning unit 40 moves from front to back. One set of cleanings is performed during a single forward travel that advances and reverses the area Ar1 from the front to the rear.

  When cleaning starts and the cleaning unit 40 exits the sub-dust box 50, the rubber tongue 41 is tilted toward the second side surface 40b of the cleaning unit 40 as shown in FIGS. 11A and 25A. .

  As shown in FIG. 25A, the range in which the cleaning brush 43 during forward movement faces the air filter 22 (the range exposed to the air filter 22) is 100 ° as the central angle α of the cylindrical cleaning brush 43. It is about ~ 120 °. For convenience of explanation, this range is referred to as a first confrontation range.

  While moving forward, the tongue member 41 in such a state undergoes elastic deformation at the convex portion 22j of the air filter 22 and climbs over the convex portion 22j as shown by a solid line in FIG. Go ahead. When the unit drive motor M4 rotates (forward rotation) by a predetermined number of pulses after starting to move forward, the cleaning unit 40 moves forward by the first predetermined distance L1.

  When the unit drive motor M4 rotates by the first predetermined number of pulses, the control unit 60 outputs a reverse rotation pulse signal for stopping the rotation of the unit drive motor M4 and rotating it in the reverse direction. Send to. In response to this pulse signal, the unit drive motor M4 rotates (reversely rotates) by a second predetermined number of pulses, and the cleaning unit 40 moves backward by a second predetermined distance L2. At the initial stage of reverse travel, the tip end portion 41 a of the tongue member 41 is caught by the convex portion 22 j of the air filter 22. If the cleaning unit 40 continues to move backward while the tip 41a of the tongue member 41 is caught by the projection 22j of the air filter 22, the cleaning brush 43 rotates as the cleaning unit 40 moves backward. When the rotation of the cleaning brush 43 is completed, the state shown in FIGS. 11B, 22 and 25B is obtained.

  As shown in FIG. 25B, the range in which the reverse cleaning brush 43 faces the air filter 22 (the range exposed to the air filter 22) is smaller than the first facing range, and is a cylindrical cleaning brush. The central angle β of 43 is about 60 ° to 80 °. For convenience of explanation, this range is referred to as a second confrontation range.

  The second confrontation range is the same as the state in which a part of the hair material 44 of the cleaning brush 43 is housed in the cleaning unit 40 in order to scrape the dust of the cleaning brush 43 and the exposed range of the hair material 44 is narrowed. That is, it is in the same range as the state when the cleaning brush 43 is in the refreshing posture.

  As indicated by a two-dot chain line in FIG. 17, the tip end portion 41 a of the tongue member 41 is in a state of pointing backward. If the cleaning unit 40 continues to move backward while the tip 41a of the tongue member 41 is pointing to the rear, the tongue member 41 repeatedly deforms to form the convex portion 22j of the air filter 22 as in the forward movement. I will get over. Then, when the cleaning unit 40 moves backward by the second predetermined distance L2, the control unit 60 transmits a pulse signal for forward rotation for stopping the rotation of the unit drive motor M4 and rotating it in the reverse direction to the unit drive motor M4. Then, the cleaning unit 40 starts moving forward again. The tip 41a of the tongue member 41 of the cleaning unit 40 that has started moving forward in the state of FIG. 11B and FIG. 22 is hooked on the convex portion 22j so that the bristle material 44 fixed to the cleaning brush 43 is exposed. 43 is rotated. Then, in the state of FIG. 11A, the cleaning unit 40 continues to advance by the first predetermined distance. In this way, the cleaning unit 40 continues to clean the air filter 22 up to the rear end portion 22n of the air filter 22 while repeating the forward movement and the reverse movement.

(3-2-2) Outward Cleaning One outward cleaning performed while repeating the above-described forward and backward movements will be described with reference to FIGS. 23 and 24. In FIGS. 23 and 24, a right-pointing arrow indicates forward movement, and a left-pointing arrow indicates backward movement. In the description using FIG. 23 and FIG. 24, a simple integer value is used for the ratio of the forward movement distance and the reverse movement distance for easy understanding. The case shown in FIG. 23 is the normal cleaning mode, and the ratio of the distance L1 that the cleaning unit 40 moves forward once and the distance L2 that moves backward once is 5: 3.

  Therefore, in the region Ar1 from the front end portion 22m to the rear end portion 22n of the air filter 22, although the cleaning brush 43 can be cleaned three times, any portion in the region Ar1 is cleaned at least twice. . Two reverses are always performed during the three cleanings, and one reverse is always performed during the two cleanings, and the cleaning brush 43 is rubbed against the peeling brush 47 to perform refreshing.

  Therefore, the second and third cleanings are also performed with the cleaning function of the cleaning brush 43 recovered. Specifically, the cleaning unit 40, for example, repeats the forward and reverse movements of 2424 pulses and 1496 pulses, when viewed in terms of the number of pulses of the unit drive motor M4. Configured to go forward.

  The case shown in FIG. 24 is a careful cleaning mode, and the ratio of the distance L1 that the cleaning unit 40 advances once and the distance L3 that moves backward once is 5: 4. Therefore, in the region Ar1 from the front end portion 22m to the rear end portion 22n of the air filter 22, the cleaning brush 43 is cleaned five times at any location. During these five cleanings, the backward movement is always performed four times, and the cleaning brush 43 is rubbed against the peeling brush 47 to refresh.

  Therefore, the first to fifth cleanings are performed with the cleaning function of the cleaning brush 43 recovered. Specifically, the cleaning unit 40, for example, repeats forward and backward movements of 2196 pulses and 1496 pulses, when viewed in terms of the number of pulses of the unit drive motor M4. Configured to go forward.

  In order to move the cleaning unit 40 accurately, at least one of the fixing device 94 abuts against the main body frame 27 before starting the movement or after the movement ends, so that the unit drive motor M4 generates only torque. Tightening is performed until.

  In addition, the same part is cleaned only once for a while (L1-L2, L1-L3) after the cleaning unit 40 goes through cleaning. For this reason, since this portion is a portion with little cleaning, for example, if this portion is a portion corresponding to the horizontal frame 22c, uneven cleaning with respect to the filter main body 22g does not occur. In addition, since the same may occur in the vicinity of the rear end portion 22n, if the cleaning unit 40 is configured to move to the horizontal frame 22d in advance, cleaning unevenness can be prevented similarly. Or you may set so that the distance of advance and reverse may become the same only at the time of the cleaning start and cleaning completion.

(3-2-3) Cleaning of the return path In the air conditioning indoor unit 10, during the single return path in which the cleaning unit 40 moves from the rear end 22n of the filter body 22g toward the front end 22m, the forward and reverse movements It is not repeated. This is because the air filter 22 is cleaned first by the forward movement of the cleaning brush 43, so that there is little dust adhering to the air filter 22. Therefore, the range in which the cleaning brush 43 and the air filter 22 face each other does not need to face in the first facing range equivalent to the first movement in the forward path.

  Therefore, the cleaning brush 43 is opposed to the air filter 22 in a second opposing range that is narrower than the first opposing range, and moves at a stroke toward the front end portion 22m while sweeping out dust slightly remaining on the air filter 22. .

  Therefore, in the air conditioning indoor unit 10, the dust left on the outward path can be collected on the return path, so that the performance of the filter cleaning function is improved.

  In addition, since the second facing range of the cleaning brush 43 in the return path is narrower than the first facing range of the cleaning brush 43 in the forward path, the load on the unit drive motor M4 can be reduced and the life of the motor can be extended. be able to.

(3-3) Setting by Operation Integrated Quantity The control unit 60 shown in FIG. 8 counts using, for example, a built-in timer so that the air conditioning indoor unit 10 performs air conditioning operation (heating operation and cooling operation). ) Is stored in the memory 62 as the accumulated operation amount. The air conditioning indoor unit 10 sets whether to perform cleaning in the careful cleaning mode or to perform cleaning in the normal cleaning mode according to the accumulated operation amount. For example, when an instruction to clean the air filter 22 is issued, it is determined whether or not the accumulated operation amount exceeds a threshold, for example, 50 hours. If the accumulated operation amount exceeds the threshold, the control unit 60 selects the careful cleaning mode on the assumption that the air filter 22 is very dirty. If the accumulated operation amount does not exceed the threshold value, the control unit 60 selects the normal cleaning mode on the assumption that there is little dust adhering to the air filter 22.

(3-4) Stopping Cleaning Operation The control unit 60 illustrated in FIG. 8 stops the normal operation and starts the cleaning operation, for example, according to an instruction from the remote controller 61. Normally, when the cleaning of the entire area Ar1 from the front end portion 22m to the rear end portion 22n of the air filter 22 is finished, the cleaning operation is terminated and the air filter 22 moves into the sub dust box 50 which is a standby position. However, since the cleaning operation takes a predetermined time, for example, ten minutes, the user is instructed to restart the air conditioning operation using the remote controller 61 at the timing until the entire cleaning of the area Ar1 is completed. In some cases, an interrupt instruction is entered.

  When an interruption occurs during the cleaning operation and an instruction to stop the cleaning operation is received, the control unit 60 ends the cleaning operation even before the cleaning of the rear end 22n of the air filter 22 is completed, and immediately reverses. The cleaning unit 40 is moved forward. And the control part 60 returns the cleaning unit 40 in the sub dust box 50 which is a standby position which should wait during air conditioning operation. Thus, even if the cleaning operation is stopped halfway, when the cleaning unit 40 moves backward toward the front, the tip 41a of the tongue member 41 is caught by the convex portion 22j, and the cleaning brush 43 is rotated by the tongue member 41. The bristle material 44 of the cleaning brush 43 is stored in the cleaning unit 40. Therefore, even if it reverses immediately, the cleaning unit 40 can be moved to the standby position without overflowing the dust from the bristle material 44 of the cleaning brush 43.

(4) Modification (4-1) Modification A
In the above-described embodiment, the case where the air filter 22 is cleaned by the forward / backward movement of the cleaning brush 43 in one forward path has been described. However, the air filter 22 is cleaned by the forward / backward movement of the cleaning brush 43 in one backward path. Thus, the air conditioning indoor unit 10 may be configured. In order to clean the air filter 22 in one return pass, the direction of rotation for exposing the bristle material 44 of the cleaning brush 43 in the first counter range and the bristle member 44 in the second counter range are exposed. Therefore, the direction of rotation may be configured to be opposite to that of the above embodiment.

(4-2) Modification B
In the above embodiment, the case where the cleaning unit 40 moves forward and backward is described in the front-rear direction, but the traveling direction of the cleaning unit 40 is not limited to the front-rear direction, and for example, the cleaning unit 40 proceeds in the left-right direction. Even in such a case, it is possible to apply the present invention by configuring the vehicle to advance while repeating leftward and rightward.

(5) Features (5-1)
In the air conditioning indoor unit 10, dust left on the forward path can be collected on the return path, so that the performance of the filter cleaning function is improved. Further, since the air filter 22 does not move and the single unit drive motor M4 merely moves the cleaning brush 43 and the housing portion including the dust box base member 45 and the dust box lid 46, the mechanism is simple and compact. Thus, the manufacturing cost can be reduced accordingly.

(5-2)
In the air conditioning indoor unit 10, during the cleaning of the forward path, since the cleaning brush 43 passes through at least the overlapping range of the first movement and the second movement during the next first movement, the cleaning brush passes the overlapping range at least twice. Therefore, it is possible to prevent the dust from being left behind.

(5-3)
In the air conditioning indoor unit 10, the cleaning brush 43 itself is cleaned by the peeling brush 47 when the cleaning brush 43 is moved second, so that the cleaning performance is recovered before the cleaning brush 43 is switched to the next first movement. Thus, more reliable dust removal can be realized.

(5-4)
In the air conditioning indoor unit 10, in the second movement or backward movement of the cleaning brush 43, the cleaning brush 43 first cleans the air filter 22 by the first movement, so that there is little dust adhering to the air filter 22, About the range where the cleaning brush 43 and the air filter 22 oppose, it is not necessary to oppose in the 1st predetermined range equivalent to 1st movement. Therefore, the load of the unit drive motor M4 is reduced by causing the cleaning brush 43 to face the air filter 22 within the first predetermined range and within the second predetermined range narrower than the first predetermined range.

10 Air Conditioning Indoor Unit 22 Air Filter 43 Cleaning Brush 45 Dust Box Base Member (First Housing)
46 Dust box lid (first housing part)
47 Peeling brush (maintenance brush)
50 Sub dust box (second housing part)
M4 unit drive motor (drive unit)

JP 2008-281230 A

Claims (4)

An air conditioning indoor unit having a filter cleaning function,
A filter (22) for removing dust from the passing air;
A cleaning brush (43) for removing dust adhering to the filter (22);
A first accommodating portion (45, 46) and a second accommodating portion (50) for accommodating dust removed from the filter (22);
A drive unit (M4) for reciprocating the filter (22) on the cleaning brush (43) and the first storage unit (45, 46);
With
When the cleaning brush (43) and the first housing part (45, 46) move in the forward path, the cleaning brush (43) removes dust from the filter (22) and the first housing part (45, 46). Housed in
When the cleaning brush (43) and the first housing part (45, 46) move along the return path, the cleaning brush (43) carries the dust remaining on the filter (22) to the second housing part (50). To be accommodated in the second accommodating portion (50).
Air conditioning indoor unit. The cleaning brush (43) advances while repeating the first movement that moves toward the end point of the forward path and the second movement that moves toward the start point of the forward path when the forward path of the filter (22) is cleaned.
The air conditioning indoor unit according to claim 1. A maintenance brush (47) for removing dust from the cleaning brush (43) to restore the function of the cleaning brush (43);
The maintenance brush (47) removes dust from the cleaning brush (43) during the second movement of the cleaning brush (43).
The air conditioning indoor unit according to claim 2. The cleaning brush (43)
At the time of the first movement, take a first posture facing the filter (22) within a first predetermined range,
A second posture facing the filter (22) in a second predetermined range within the first predetermined range and narrower than the first predetermined range at the time of the second movement or the return path movement;
Take
The air conditioning indoor unit according to claim 2.

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