JP6512397B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner and the like.

  As disclosed in Patent Document 1, the air conditioner has a filter cleaning device. The filter cleaning device comprises a roller at the lower end of the suction port. The cleaning brush faces the roller. In cleaning the air filter, the air filter is wound around a roller. A cleaning brush acts on the wound air filter.

JP, 2014-70884, A

  Depending on the flexibility of the air filter, a certain size of the diameter of the roller is required. In this way, when the roller is disposed in front of the heat exchanger, the depth of the air conditioner is increased, and the air conditioner largely protrudes forward from the wall surface to be attached. In particular, when the electrical component box is disposed in front of the heat exchanger, the amount of protrusion from the wall further increases.

  According to some aspects of the present invention, it is possible to provide an air conditioner that can reduce the depth of the occupied space when installing the air conditioner as much as possible.

  One aspect of the present invention is a filter facing the suction port and moving along a determined movement path, and a cleaning brush disposed above the contour of the suction port corresponding to the lower end of the filter; And a filter rail for guiding the displacement of the lower end of the filter downward from the contour of the suction port to the lower limit position.

  The filter faces the suction port. The lower end of the filter is positioned corresponding to the contour of the suction port. When cleaning the filter, the cleaning brush contacts the filter. When the lower end of the filter is lowered to the lower limit position, the filter located above the cleaning brush is brushed to the cleaning brush. When the lower end of the filter rises to the position of the cleaning brush, the filter located below the cleaning brush is brushed to the cleaning brush. The filter is thus cleaned evenly with the cleaning brush. There is no need to arrange a roller at the lower end of the suction port. The air conditioner can reduce the depth of the occupied space.

The air conditioner includes an electrical component box attached to the main body below the support, and a contour line of the suction port continuously from the guiding path of the first filter rail behind the electrical component box. Ru and a second filter rails for guiding the displacement of the lower end of the filter to the lower limit position downward from. Therefore, the electrical component box does not interfere with the removal of the support. In addition, the first filter rail of the support can be separated from the second filter rail behind the electrical equipment box, the first filter rail of the support being continuous with the second filter rail behind the electrical equipment box Although the guide path is formed , there is no hindrance to the desorption of the support.

The air conditioner may further include a drive member transmitting to the filter a driving force that causes the filter to move toward the lower limit position. At this time, a bending portion may be formed in the movement path of the filter between the second filter rail and the driving member. If the drive member continues to act on the filter after the lower end of the filter reaches the lower limit position, the filter projects forward between the filter rail and the drive member. Even after the lower end of the filter has reached the lower limit position, the filter can be moved relative to the cleaning brush. The filter can thus be brushed to the cleaning brush over a wide area.

The air conditioner may further include a sensor installed in the body to detect the filter reaching the lower limit position. In normal operation, the lower end of the filter moves away from the lower limit position, so the sensor does not operate. The operating time of the sensor can be reduced. Here, at least two filters may be arranged in the horizontal direction in the body, and the sensor may be installed for each of the filters. When the lower ends of the individual filters reach the lower limit position, the lower ends of the filters are aligned in a straight line. Thus, the movement of the filter can be synchronized. The cleaning of the filter can be initiated and ended simultaneously and the cleaning time can be reduced.

  As mentioned above, according to the aspect of an indication, the air conditioner which can reduce the depth of the occupied space at the time of air conditioner installation as much as possible is realizable.

BRIEF DESCRIPTION OF THE DRAWINGS It is a conceptual diagram which shows roughly the structure of the air conditioner which concerns on one Embodiment of this invention. It is a perspective view showing roughly the appearance of the indoor unit concerning one embodiment. It is a perspective view which shows the structure of the main body of an indoor unit roughly. It is an exploded perspective view showing the structure of an indoor unit roughly. It is an expansion perspective view showing the structure of an air filter roughly. It is an expansion vertical sectional view of the main part of an indoor unit. It is an expansion perspective view showing the structure of the lower end of a filter rail roughly. FIG. 7 is an enlarged vertical sectional view corresponding to FIG. 6 and showing movement of the air filter toward the upper limit position. FIG. 7 is an enlarged vertical sectional view corresponding to FIG. 6 and showing movement of the air filter toward the lower limit position.

  Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings.

(1) Configuration of Air Conditioner FIG. 1 schematically shows the configuration of an air conditioner 11 according to an embodiment of the present invention. The air conditioner 11 includes an indoor unit 12 and an outdoor unit 13. The indoor unit 12 is installed, for example, in an indoor space in a building. Besides, the indoor unit 12 may be installed in a space corresponding to the indoor space. An indoor heat exchanger 14 is incorporated in the indoor unit 12. A compressor 15, an outdoor heat exchanger 16, an expansion valve 17, and a four-way valve 18 are incorporated in the outdoor unit 13. The indoor heat exchanger 14, the compressor 15, the outdoor heat exchanger 16, the expansion valve 17 and the four-way valve 18 form a refrigeration circuit 19.

  The refrigeration circuit 19 includes a first circulation path 21. The first circulation path 21 mutually connects the first port 18 a and the second port 18 b of the four-way valve 18. A compressor 15 is provided in the first circulation path 21. The suction pipe 15 a of the compressor 15 is connected to the first port 18 a of the four-way valve 18 via a refrigerant pipe. The gas refrigerant is supplied to the suction pipe 15 a of the compressor 15 from the first port 18 a. The compressor 15 compresses the low pressure gas refrigerant to a predetermined pressure. The discharge pipe 15 b of the compressor 15 is connected to the second port 18 b of the four-way valve 18 via a refrigerant pipe. The gas refrigerant is supplied to the second port 18 b of the four-way valve 18 from the discharge pipe 15 b of the compressor 15. The refrigerant pipe may be, for example, a copper pipe.

  The refrigeration circuit 19 further includes a second circulation path 22. The second circulation path 22 mutually connects the third port 18 c and the fourth port 18 d of the four-way valve 18. The outdoor heat exchanger 16, the expansion valve 17, and the indoor heat exchanger 14 are incorporated in the second circulation path 22 in order from the third port 18c side. The outdoor heat exchanger 16 exchanges heat energy between the passing refrigerant and the ambient air. The indoor heat exchanger 14 exchanges heat energy between the passing refrigerant and the ambient air. The second circulation path 22 may be formed of, for example, a refrigerant pipe such as a copper pipe.

  A blower fan 23 is incorporated in the outdoor unit 13. The blower fan 23 ventilates the outdoor heat exchanger 16. The blower fan 23 generates an air flow according to, for example, the rotation of the impeller. The air flow passes through the outdoor heat exchanger 16. The flow rate of the passing air is adjusted in accordance with the rotational speed of the impeller.

  A blower fan 24 is incorporated in the indoor unit 12. The blower fan 24 ventilates the indoor heat exchanger 14. The blower fan 24 generates an air flow according to the rotation of the impeller. Indoor air is drawn into the indoor unit 12 by the function of the blower fan 24. The indoor air passes through the indoor heat exchanger 14 and exchanges heat with the refrigerant. The heat-exchanged cold air or warm air stream is blown out of the indoor unit 12. The flow rate of the passing air is adjusted by the rotational speed of the impeller.

  When cooling operation is performed by the refrigeration circuit 19, the four-way valve 18 connects the second port 18b and the third port 18c to each other and connects the first port 18a and the fourth port 18d to each other. Therefore, the high temperature and high pressure refrigerant is supplied to the outdoor heat exchanger 16 from the discharge pipe 15 b of the compressor 15. The refrigerant flows through the outdoor heat exchanger 16, the expansion valve 17 and the indoor heat exchanger 14 in order. The outdoor heat exchanger 16 dissipates heat from the refrigerant to the outside air. The refrigerant is depressurized to a low pressure by the expansion valve 17. The decompressed refrigerant absorbs heat from ambient air in the indoor heat exchanger 14. Cold air is generated. Cold air is blown out into the indoor space by the action of the blower fan 24.

  When the heating operation is performed by the refrigeration circuit 19, the four-way valve 18 connects the second port 18b and the fourth port 18d to each other and connects the first port 18a and the third port 18c to each other. A high temperature and high pressure refrigerant is supplied from the compressor 15 to the indoor heat exchanger 14. The refrigerant flows through the indoor heat exchanger 14, the expansion valve 17 and the outdoor heat exchanger 16 in order. The indoor heat exchanger 14 dissipates heat from the refrigerant to the ambient air. Warm air is generated. The warm air is blown out into the indoor space by the action of the blower fan 24. The refrigerant is depressurized to a low pressure by the expansion valve 17. The decompressed refrigerant absorbs heat from ambient air in the outdoor heat exchanger 16. Thereafter, the refrigerant returns to the compressor 15.

(2) Configuration of Indoor Unit FIG. 2 schematically shows the appearance of the indoor unit 12 according to one embodiment. An outer panel 26 covers the main body 25 of the indoor unit 12. An air outlet 27 is formed on the lower surface of the main body 25. The outlet 27 is opened toward the room. The main body 25 can be fixed to, for example, a wall surface in a room. The blowout port 27 blows out a flow of cold air or warm air generated by the indoor heat exchanger 14.

  A pair of front and rear wind direction plates 28 a and 28 b is disposed at the air outlet 27. The upper and lower wind direction plates 28a, 28b can rotate about horizontal axes 29a, 29b, respectively. The up and down wind direction plates 28a and 28b can open and close the air outlet 27 according to the rotation. The direction of the blown air can be changed according to the angle of the up and down wind direction plates 28a, 28b.

  As shown in FIG. 3, a suction port 31 is formed in the main body 25. The suction port 31 opens at the front and the top of the main body 25. The outer panel 26 can be covered by the suction port 31 in front of the main body 25. Air flowing into the indoor heat exchanger 14 is taken in from the suction port 31.

  The lower end of the suction port 31 in the front of the main body 25 is defined by the contour line 31 (hereinafter referred to as the "lower contour line") of the suction port 31. Here, the lower side contour 31 a of the suction port 31 is formed by the electrical component box 32. The electrical component box 32 is attached to the main body 25. The electrical component box 32 may be integrally formed with the main body 25. Thus, the electrical component box 32 is disposed below the lower contour 31a. The electrical component box 32 accommodates control circuits and other electrical components. The control circuit controls the operation of the indoor unit 12.

  A plurality of air filter assemblies 34 of the same shape are arranged in the suction port 31. The air filter assembly 34 includes an air filter 35 and a holding portion (support) 36. The air filter 35 is supported and held by the holding portion 36. The holding portion 36 has a frame 37. The holding portion 36 is fixed to the main body 25 by the frame 37. When the holding portion 36 is set to the main body 25, the air filter 35 is disposed over the entire surface of the suction port 31. The lower end of the air filter 35 is disposed at a position corresponding to the lower contour line 31 a of the suction port 31 at the time of air blowing driven by the air blowing fan 24 described later.

  The frame 37 of the holder 36 is provided with a front filter rail 38 for holding a frame of an air filter 35 described later. A rear filter rail 39 is provided on the main body 25 corresponding to the front filter rail 38. The filter rails 38, 39 are formed along a vertical plane orthogonal to the horizontal axes 29a, 29b, and slidably hold the left and right ends of the air filter 35. The filter rails 38, 39 define the movement path of the air filter 35.

  As shown in FIG. 4, the blower fan 24 is rotatably supported by the main body 25. For example, a cross flow fan is used as the blower fan 24. The blower fan 24 rotates around a rotation axis 41 parallel to the horizontal axes 29a, 29b. The rotating shaft 41 of the blower fan 24 extends in the horizontal direction when the main body 25 is installed. The blower fan 24 is disposed parallel to the blower outlet 27. The driving force around the rotation shaft 41 is transmitted to the blower fan 24 from a drive source (not shown). The drive source is supported by the main body 25. The air flow passes through the indoor heat exchanger 14 according to the rotation of the blower fan 24. As a result, a cold or warm air stream is generated. The air stream of cold air or warm air is blown out from the air outlet 27.

  The indoor heat exchanger 14 includes a front body 14a and a rear body 14b. The front body 14 a faces the blower fan 24 from the front side of the blower fan 24. The rear body 14 b faces the blower fan 24 from the rear side of the blower fan 24. The front side body 14a and the rear side body 14b are mutually connected at the upper end. The front side body 14a and the rear side body 14b have a refrigerant pipe 42a. The refrigerant pipe 42a reciprocates in the horizontal direction. That is, the refrigerant pipe 42a extends parallel to the horizontal axes 29a and 29b, is folded back at the left and right ends of the main body 25 in front view, extends again parallel to the horizontal axes 29a and 29b, and is folded back at the left and right ends of the main body 25 again. , These are repeated. The refrigerant pipe 42 a constitutes a part of the second circulation path 22. A plurality of heat dissipating fins 42b are coupled to the refrigerant pipe 42a. The heat dissipating fins 42b extend parallel to each other while being orthogonal to the horizontal axes 29a, 29b. The refrigerant pipe 42a and the radiation fin 42b can be made of, for example, a metal material such as copper or aluminum. Heat exchange is realized between the refrigerant and the air through the refrigerant pipe 42a and the radiation fin 42b.

  As shown in FIG. 4, the individual air filter assembly 34 includes a filter cleaning unit 43. The filter cleaning unit 43 includes an upper dust box 45 and a lower dust box 46. The upper dust box 45 and the lower dust box 46 are attached to the frame 37 of the holder 36. The upper dust box 45 is disposed on the front side of the air filter 35. The upper dust box 45 has a cover 47. The cover 47 covers the space in the box body 48 so as to open and close. The lower dust box 46 is disposed on the rear side of the air filter 35. The upper dust box 45 and the lower dust box 46 are disposed horizontally to the air filter 35. When the air filter 35 is cleaned, dust on the front of the air filter 35 is generally collected in the box main body 48 of the upper dust box 45, and dust on the rear surface of the air filter 35 is collected in the lower dust box 46.

  The filter cleaning unit 43 includes a first driven gear 51 and a second driven gear 52. The first driven gear 51 is attached to the upper dust box 45. The first driven gear 51 rotates around the horizontal axis 53. The first driven gear 51 rotationally drives a cleaning brush, which will be described later, in the upper dust box 45. The teeth of the first driven gear 51 are partially exposed from the outer surface of the upper dust box 45. Similarly, the second driven gear 52 is attached to the lower dust box 46. The second driven gear 52 rotates about the horizontal axis 54. The second driven gear 52 is provided at both ends of the lower dust box 46 and drives an air filter described later. The teeth of the second driven gear 52 are partially exposed from the outer surface of the lower dust box 46. When the air filter assembly 34 is set in the main body 25, the first driven gear 51 meshes with a first drive gear (not shown) mounted on the main body 25, and similarly, the second driven gear 52 is mounted on the main body 25. 2 Engage with the drive gear (not shown). A drive source (not shown) such as an electric motor is connected to each drive gear individually. The first driven gear 51 and the second driven gear 52 individually rotate in accordance with the driving force supplied from each driving source.

  As shown in FIG. 5, the air filter 35 comprises a frame 56 and a mesh sheet 57. The mesh sheet 57 is configured by combining, for example, fibers of polyethylene terephthalate (resin fibers) in a lattice. The mesh sheet 57 is supported by the frame 56. The frame 56 has a function of holding the shape of the mesh sheet 57. The frame 56 is molded from a resin material (for example, polypropylene). The mesh of the mesh sheet 57 is disposed on the frame 56 so as to intersect with the air flow.

  A rack 58 is formed on the frame 56 of the air filter 35. The racks 58 are provided on a pair of opposing frame portions of the frame 56. The rack 58 meshes with a pinion 61 which is a driving member to be described later and stored in the lower dust box 46. The pinion 61 is connected to the second driven gear 52. The rotation of the second driven gear 52 is transmitted to the pinion 61. Thus, in response to the rotation of the second driven gear 52, the air filter 35 moves back and forth along the filter rails 38, 39. The air filter 35 moves relative to the upper dust box 45 and the lower dust box 46.

  As shown in FIG. 6, the filter cleaning unit 43 includes a pinion (drive member) 61. The pinion 61 is rotatably supported by the lower dust box 46, for example. The outer periphery of the pinion 61 faces, for example, a curved surface of a pressing plate (guide member) 62 formed on the frame 37 at a predetermined interval. The curved surface is formed by a generatrix parallel to the rotation axis of the pinion 61. When the air filter 35 is attached to the holding portion 36, the frame 56 and the rack 58 are sandwiched between the outer periphery of the pinion 61 and the curved surface of the pressing plate 62. Thus, the rack 58 meshes with the pinion 61. The pressing plate 62 prevents the rack 58 from being separated from the pinion 61. The movement of the air filter 35 is guided by the pinion 61 and the pressing plate 62.

  The pinion 61 is connected to the second driven gear 52. The rotation of the second driven gear 52 is transmitted to the pinion 61. The rotation of the pinion 61 causes the movement of the rack 58 in the tangential direction of the pinion 61. Thus, the relative movement of the air filter 35 with respect to the upper dust box 45 and the lower dust box 46 is realized in the direction along the vertical plane orthogonal to the horizontal axes 29a, 29b according to the rotation of the second driven gear 52.

  The filter cleaning unit 43 includes a cleaning brush 63 disposed in association with the air filter 35. The cleaning brush 63 is disposed above the lower contour line 31 a of the suction port 31 corresponding to the lower end of the air filter 35. The cleaning brush 63 is housed in the upper dust box 45.

  The cleaning brush 63 includes a brush pedestal 64. The brush pedestal 64 can be rotated about the horizontal axis 65 by the driving force from the first driven gear 51. The brush bristles 66 are arranged on the cylindrical surface of the brush base 64 over a predetermined central angle range. The flocking area of the brush bristles 66 has a spread across the air filter 35 in the axial direction of the brush base 64. The cleaning brush 63 brings the bristles 66 into contact with the air filter 35 at a predetermined rotational position, and separates the bristles 66 from the air filter 35 at other than the rotational position. When the air filter 35 moves along the filter rails 38 and 39 with the brush bristles 66 in contact with the air filter 35, dust attached to the front surface of the air filter 35 can be caught by the brush bristles 66.

  The filter cleaning unit 43 comprises a brush holder 67. The brush holder 67 is housed in the lower dust box 46. The brush holder 67 has a receiving surface 68. The receiving surface 68 faces the cleaning brush 63. When the brush bristles 66 contact the air filter 35, the receiving surface 68 sandwiches the air filter 35 with the brush bristles 66. In addition, bristles may be implanted on the receiving surface 68.

  The main body 25 is further provided with a lower filter rail 72. The lower filter rail 72 extends downward from the lower contour 31 a of the suction port 31. The lower filter rail 72 defines, for example, a linear guide path 73. When the air filter assembly 34 is attached to the main body 25, the filter rail 38 of the frame 37 is continuous with the guide path 73 of the lower filter rail 72 to form a movement path of the air filter 35. Thus, the lower filter rail 72 guides the displacement of the lower end of the air filter 35 to the lower limit position 74 of the movement path. The pinion 61 transmits to the air filter 35 a driving force that causes the air filter 35 to move toward the lower limit position 74.

  A bent portion 38 a is formed between the lower filter rail 72 and the pinion 61 on the front filter rail 38. The bent portion 38a interconnects the forwardly descending filter rail 38 and the vertical filter rail 38. A cut 75 is formed in the lower filter rail 72 below the bent portion 38a. When the air filter 35 is restrained below the cut 75 and the pinion 61 continues to drive the air filter 35 downward, the air filter 35 projects forward from the cut 75.

  As shown in FIG. 7, a sensor 77 is incorporated in the main body 25. The sensor 77 detects the air filter 35 which reaches the lower limit position 74. Here, a limit switch is used as the sensor 77. The limit switch is disposed in the guide path 73 of the lower filter rail 72. The limit switch comprises a contact piece 78 which projects towards the interior space of the guide path 73. An inclined surface 79 is formed on the contact piece 78. The slope 79 moves away from the wall surface of the lower filter rail 72 as it approaches the lower limit position 74. When the lower end of the air filter 35 reaches the lower limit position 74 along the guide path 73, the lower end of the air filter 35 contacts the inclined surface 79. The contact piece 78 retracts toward the wall surface of the lower filter rail 72 by the action of the air filter 35. When the contact piece 78 is retracted, the limit switch is energized. The sensor 77 is turned on. As long as the air filter 35 does not reach the lower limit position 74, the sensor 77 is kept off. A sensor 77 is provided for each air filter assembly 34.

(3) Operation of Indoor Unit When the blower fan 24 operates, an air flow is generated in the main body 25 from the suction port 31 to the blowout port 27. The air drawn from the suction port 31 passes through the air filter 35 and passes through the indoor heat exchanger 14. During the cooling operation, the air is cooled by the indoor heat exchanger 14 and blown out from the outlet 27. During the heating operation, the air is warmed by the indoor heat exchanger 14 and blown out from the outlet 27. When the air flow passes through the air filter 35, dust larger than the mesh size of the mesh sheet 57 can not pass through the mesh. Dust is captured on the front of the air filter 35. Dust and the like are removed from the air flow flowing toward the indoor heat exchanger 14. A clean air flow flows into the indoor heat exchanger 14. Cold air or warm air of clean air is blown out from the blowout port 27.

  At the time of such air blowing, the lower end of the air filter 35 is aligned with the lower contour 31 a of the suction port 31. Thus, when the lower end of the air filter 35 is aligned, the upper end of the air filter 35 is aligned with the upper end of the suction port 31. Thus, the air filter 35 is disposed on the entire surface of the suction port 31. The air filter 35 spreads in the front-rear direction along the movement path with a minimum length. When the air flow circulates through the suction port 31, the air flow passes through the air filter 35.

  Next, cleaning of the air filter 35 will be described. The filter cleaning unit 43 operates to clean the air filter 35. In the filter cleaning unit 43, the brush base 64 rotates. The bristles 66 of the cleaning brush 63 contact the front surface of the air filter 35 in response to the rotational movement of the brush base 64. At this time, the rear surface of the air filter 35 is received by the receiving surface 68 of the brush receiver 67. The air filter 35 is sandwiched between the bristles 66 and the receiving surface 68.

  The second driven gear 52 is driven. The air filter 35 moves back and forth along the filter rails 38, 39. According to the movement of the air filter 35, the brush bristles 66 trace the front of the air filter 35. Thus, the brush bristles 66 trap dust from the front of the air filter 35. The trapped dust is collected in the upper dust box 45. Dust that has fallen due to the contact between the receiving surface 68 and the air filter 35 is collected in the lower dust box 46.

  As shown in FIG. 8, when the lower end 35 a of the air filter 35 ascends to the position of the cleaning brush 63, the portion of the air filter 35 located below the cleaning brush 63 is brushed with the brush hairs 66. At this time, the displacement of the upper end 35 b of the air filter 35 is guided by the auxiliary guide path 81. The air filter 35 wraps around the back of the indoor heat exchanger 14 along the auxiliary guide passage 81.

  As shown in FIG. 9, when the lower end 35 a of the air filter 35 is lowered to the lower limit position 74, a portion of the air filter 35 located above the cleaning brush 63 is brushed to the bristles 66. After the lower end 35a of the air filter 35 reaches the lower limit position 74, when the driving force of the pinion 61 continues to act on the rack 58 of the air filter 35, the air filter 35 moves forward between the lower filter rail 72 and the pinion 61. Overhang. Even after the lower end 35a of the air filter 35 reaches the lower limit position 74, the air filter 35 can move relative to the cleaning brush 63. Thus, the upper end 35 b of the air filter 35 can reach the position of the cleaning brush 63. Thus, the air filter 35 can be brushed to the cleaning brush 63 in a wide range. The air filter 35 is evenly cleaned by the cleaning brush 63.

The air filter 35 when cleaning the air filter 35 so can be largely moved toward the lower limit position 74 from the lower side contour line 3 1 a suction mouth 3 1. It is not necessary to arrange the roller on the lower side of the inlet 3 1. The air conditioner 11 can reduce the depth of the occupied space. Moreover, since the lower end 35a of the air filter 35 which in normal operation is matched to the lower contour line 3 1 a suction mouth 3 1, the air filter 35 can be miniaturized is reduced to the maximum, the air filter 35 The cleaning area of the can be reduced. The reduction of the cleaning area can contribute to shortening of the cleaning time.

  When the lower end 35a of the air filter 35 reaches the lower limit position 74, the sensor 77 is turned on. When the lower ends of the two air filters 35 are detected at the lower limit position 74, the lower ends 35a of the two air filters 35 are aligned in one straight line. The movement of the air filter 35 can be synchronized. Thus, drive control can be made common by the two air filters 35. The cleaning of the air filter 35 can be simultaneously started and ended simultaneously, and the cleaning time can be minimized. If the cleaning process is temporally shifted between the two air filters 35, the cleaning time will be extended.

  In the air conditioner 11, the air filter assembly 34 can be attached to and detached from the main body 25. The lower end of the air filter assembly 34 is fitted to the lower contour line 31 a of the suction port 31 for attachment and detachment. Since the lower filter rail 72 is disposed away from the suction port 31, the lower filter rail 72 does not interfere in attaching and detaching the air filter assembly 34. Similarly, even when the electric component box 32 is disposed at a position away from the suction port 31, no interference occurs between the electric component box 32 and the air filter assembly 34 when the air filter assembly 34 is attached or detached. Even if the electrical component box 32 is disposed out of the suction port 31, no problem occurs in the attachment and detachment of the air filter assembly 34.

  The air filter 35 reaching the lower limit position 74 acts on the sensor 77. Since the lower end 35a of the air filter 35 moves away from the lower limit position 74 during the normal operation, the sensor 77 is turned off. The operating time of the sensor 77 can be reduced. On the other hand, when the lower end 35a of the air filter 35 is maintained at the lower limit position during normal operation, the sensor continues to operate. Continuation of operation affects the lifetime of the sensor.

  11 air conditioner, 25 main body, 31 suction port, 31a lower side contour line, 32 electric component box, 35 air filter, 35a lower end, 36 support (holding portion), 61 driving member (pinion), 63 cleaning brush, 72 Filter rail, lower limit position, 77 sensors.

Claims (4)

A main body accommodating the heat exchanger and guiding the air flow from the suction port toward the heat exchanger;
A support holding a filter facing the suction port and having a first filter rail mounted on the body to guide movement of the filter;
A cleaning brush disposed above the contour of the suction port corresponding to the lower end of the filter;
An electrical component box attached to the body below the support;
A second filter rail for guiding the displacement of the lower end of the filter from the contour line of the suction port downward to the lower limit position continuously from the guiding path of the first filter rail behind the electrical component box; An air conditioner characterized by comprising. The air conditioner according to claim 1, further comprising a drive member for transmitting a drive force causing movement of the filter toward the lower limit position to the filter, between the second filter rail and the drive member. air conditioner, wherein a bent portion is formed in the moving path of the filter.   The air conditioner according to claim 1, further comprising: a sensor installed in the main body to detect the filter reaching the lower limit position. The air conditioner according to claim 3, wherein at least two of the filters are arranged horizontally in the main body, and the sensor is installed for each of the filters.

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