JP4433076B2 - Air conditioning indoor unit - Google Patents

Description

  The present invention relates to a ceiling-mounted air conditioning indoor unit.

  2. Description of the Related Art Conventionally, an air conditioning indoor unit that closes an opening of a decorative panel with a movable panel that can be moved up and down is widely known as a ceiling-mounted air conditioning indoor unit (see, for example, Patent Document 1). In the air conditioner indoor unit, the movable panel is lifted by a wire, and the movable panel descends when the lifting device feeds the wire, and the movable panel rises by winding the wire.

  The movable panel descends during filter maintenance, and rises and closes the opening during operation and when stopped. That is, the opening is only fully opened at the time of maintenance of the filter, and is normally closed except for the suction ports on both sides in the normal state. In such an air conditioning indoor unit, the suction port is always open, and the filter and the interior of the indoor unit are exposed to the human eye through the suction port, so that the design is remarkably deteriorated.

Therefore, the applicant has studied an air-conditioning indoor unit that supports a movable panel that can be moved up and down in the vicinity of the suction port so as to be rotatable by a hinge system, and can close the suction port when operation is stopped. However, in order to prevent interference with the periphery of the suction port when the suction port is opened while the movable panel rotates, the clearance between the movable panel and the suction port has been set wider. Has been found to reduce the design.
JP-A-10-196999

  An object of the present invention is to provide an air conditioning indoor unit that can set a small gap between the movable panel and the periphery of the suction port in an air conditioning indoor unit that rotatably supports the movable panel in the vicinity of the suction port by a hinge system. There is.

An air conditioning indoor unit according to a first aspect of the present invention is a ceiling-mounted air conditioning indoor unit, and includes a main body and a movable panel. The main body has an opening on the lower surface for sucking air during air conditioning operation. The movable panel opens and closes the opening by closing the opening when the operation is stopped and rotating during the air-conditioning operation. The rotation center axis of the movable panel is arranged at a position away from the vicinity of the boundary between the main body and the movable panel. The surface of the movable panel closer to the rotation center axis is an inclined surface that is inclined away from the rotation center axis as it goes upward, and is adjacent to the main body.

In this air conditioning indoor unit, when the movable panel opens the opening, the opening is opened while widening the gap between the main body and the movable panel, so that the main body and the movable panel do not interfere with each other. As a result, the gap between the main body and the movable panel when the movable panel closes the opening is set small, and the design is improved. Further, when the movable panel opens the opening, the opening is opened while widening the gap between the main body and the movable panel, but the gap is set smaller in the case with the inclined portion than in the case without the inclined portion. As a result, design properties are improved.

An air conditioning indoor unit according to a second aspect of the present invention is the air conditioning indoor unit according to the first aspect of the present invention, further comprising a lever that is mounted on the movable panel and connects the movable panel and the rotation center axis. In this air conditioning indoor unit, the rotation center axis, the lever, and the movable panel do not need to be integrated, so that the degree of freedom in designing the rotation center axis and the lever is increased.

  The air conditioning indoor unit according to the third aspect of the present invention is the air conditioning indoor unit according to the second aspect of the present invention, further comprising a connecting device for mounting the lever 61 on the movable panel, and the effects of the second aspect of the present invention are easily exhibited.

  An air conditioning indoor unit pertaining to a fourth aspect of the invention is the air conditioning indoor unit pertaining to any one of the first to third aspects of the invention, wherein the movable panel has the shortest moving distance when the movable panel is opened. Moves below the portion that was the boundary between the main body and the movable panel when the movable panel closed the opening.

  In this air conditioning indoor unit, when the movable panel opens, the movable panel covers a part of the periphery of the opening, so that the gap when viewed from below is hidden, and the design is improved.

  In the air conditioning indoor unit pertaining to the first aspect of the invention, the gap between the main body and the movable panel when the movable panel closes the opening is set small, and the design is improved.

In the air conditioning indoor unit according to the second and third aspects of the invention , the rotation center axis, the lever, and the movable panel do not need to be integrated, so the degree of freedom in designing the rotation center axis and the lever is increased.

  In the air conditioning indoor unit pertaining to the fourth aspect of the invention, when the movable panel opens the opening, the movable panel covers a part of the periphery of the opening, so the gap when viewed from below is hidden and the design is improved.

  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.

<Configuration of air conditioning indoor unit 2>
FIG. 1 is an external perspective view of an air conditioning indoor unit according to an embodiment of the present invention. In FIG. 1, the air conditioning indoor unit 2 includes a main body 20 having a suction port 20a and an outlet 20b on a lower surface, a movable panel 24 that opens and closes the suction port 20a, and a first air direction adjusting blade 52 that opens and closes the outlet 20b. ing. The suction port 20a and the air outlet 20b are adjacent to each other with a certain distance therebetween, so that a phenomenon in which air blown from the air outlet 20b is sucked into the air inlet 20a, that is, a so-called short circuit does not occur. The lower surface of the main body 20 is covered with a decorative panel 21, and it is the decorative panel 21 that is actually exposed to the ceiling surface. The outlines of the suction port 20 a and the air outlet 20 b are formed by the decorative panel 21. Here, the decorative panel 21 is also included in the main body 20.

  FIG. 2A is a side view when the operation of the air-conditioning indoor unit is stopped, FIG. 2B is a side view when the air-conditioning indoor unit is operated, and FIG. FIG. 2A, 2B, and 2C, the movable panel 24 is apparently integrated with the decorative panel 21 when the air conditioning indoor unit 2 is stopped. In FIG.2 (b), when the air-conditioning indoor unit 2 operates, the movable panel 24 opens the suction inlet 20a, and the 1st wind direction adjustment blade | wing 52 opens the blower outlet 20b. One end of the movable panel 24 is supported by the main body 20 by a hinge, and the movable panel 24 rotates to open the suction port 20a.

  Moreover, in FIG.2 (c), the movable panel 24 can be lowered | hung to the maintenance position which a user's hand reaches in the state hung on the wire 71 extended from the main body 20 side. However, since the movable panel 24 cannot be lowered to the maintenance position when one end is supported by the main body 20 with a hinge, the maintenance is performed after the suction port 20a is closed and the support by the main body 20 is released. Descent to position.

  FIG. 3 is a cross-sectional view of the air conditioning indoor unit. In FIG. 3, the air conditioning indoor unit 2 further includes a filter 9, a filter cleaning mechanism 10, an indoor heat exchanger 12, an indoor fan 13, a drain pan 14, and an outlet module 50. During the operation of the air conditioning indoor unit 2, the inlet 20a and the outlet 20b are opened, the indoor fan 13 is rotated, and air is sucked from the inlet 20a.

(Indoor heat exchanger 12)
The indoor heat exchanger 12 has a shape in which two heat exchangers are adjacent to each other in different inclined postures. For convenience of explanation, the upper heat exchanger is the upper heat exchanger 12a and the lower heat exchanger is the lower heat exchanger. This is called the exchanger 12b.

  The upper end of the upper heat exchanger 12a is located on the inner upper part of the main body 20, and the angle inclined from the upper end to the lower end is set to 45 ° or more and 60 ° or less (preferably 55 °) with respect to the horizontal line, Condensed water is surely transmitted through the upper heat exchanger 12a to the drain pan 14. For this reason, the drain pan 14 does not need to be disposed in the entire lower area of the upper heat exchanger 12a, and is disposed only in the vicinity of the lower end of the upper heat exchanger 12a.

  The upper end of the lower heat exchanger 12b is disposed close to the lower end of the upper heat exchanger 12a, and the angle inclined from the upper end toward the lower end is less than 45 ° with respect to the horizontal line. For this reason, since condensed water may fall directly, the drain pan 14 is arrange | positioned in the downward whole area of the lower heat exchanger 12b.

(Indoor fan 13)
The indoor fan 13 is a cross-flow fan, has a width dimension longer than the diameter, and sucks air from the direction perpendicular to the rotation axis. Therefore, the indoor fan 13 sucks air from the single suction port 20a to the single blower outlet 20b. Can be blown out. The sucked air passes through the filter 9 and the indoor heat exchanger 12 and enters the indoor fan 13.

  The air blown out from the indoor fan 13 passes through the blowout outlet module 50 and is blown out from the blowout opening 20b. The blower outlet 20b is provided with a first wind direction adjusting blade 52, which is a component of the blower outlet module 50. The first wind direction adjusting blade 52 can be adjusted in inclination angle by a motor, and when the operation is stopped. The 1st wind direction adjustment blade | wing 52 closes the blower outlet 20b. A tongue portion 15 is provided between the indoor fan 13 and the drain pan 14 and on the side of the blowout flow passage 41a, and this tongue portion 15 prevents leakage of blown air and improves performance.

<Filter cleaning mechanism 10>
As shown in FIG. 3, the air conditioning indoor unit 2 includes a filter cleaning mechanism 10 above the movable panel 24. Hereinafter, components of the filter cleaning mechanism 10 will be described.

(Filter 9)
The filter 9 is disposed on the front side of the indoor heat exchanger 12 and removes dust from the air taken in from the room. Thus, the filter 9 prevents dust floating in the air from contaminating the surface of the indoor heat exchanger 12. A rack 101 that meshes with the pinion gear 102 a is formed at the edge of the filter 9.

(Roller 102)
The roller 102 has a pinion gear 102a. The pinion gear 102a meshes with the rack 101 of the filter 9, and moves the filter 9 horizontally by rotating.

(Position detection switch 107)
The stop position of the filter 9 is detected by the position detection switch 107. The position detection switch 107 is arranged near the end of the front storage unit 105 and near the end of the rear storage unit 106. A lever is attached to the outside of the position detection switch 107 by a hinge. When an external force is applied, the lever rotates and pushes the button of the position detection switch 107.

(Brush 108 and dust box 109)
The brush 108 is located on the opposite side of the roller 102 with the filter 9 in between and is in contact with the filter 9. The dust box 109 has a dust inlet near the upper air outlet 20b, and supports the rotating shaft of the brush 108 via a bearing at both ends in the longitudinal direction of the dust inlet. Further, a comb portion 109c is attached to the dust intake port to remove the dust scraped off from the filter 9 by the brush 108 from the brush 108.

(Filter cleaning operation)
In the air conditioning indoor unit 2, the filter 9 is automatically cleaned by the control unit periodically or when the user requires it. The mechanism will be described below.

  In FIG. 3, the rack 101 of the filter 9 is housed in the front storage portion 105, and one end of the rack 101 (hereinafter referred to as the first end portion) is engaged with the pinion gear 102a. When the roller 102 rotates, the rotation is transmitted from the pinion gear 102 a to the rack 101, and the rack 101 of the filter 9 is conveyed to the rear storage unit 106 side by the roller 102. As the roller 102 continues to rotate, the first end portion of the rack 101 reaches the end of the rear storage portion 106.

  When the filter 9 moves, dust adhering to the surface of the filter 9 is scraped off by the brush 108 and stored in the dust box 109. The brush 108 is rotating at least during the period when the filter 9 is moving from the front storage portion 105 to the rear storage portion 106, and the rotation direction thereof is a direction opposite to the traveling direction of the filter 9.

  When the filter 9 moves from the front storage unit 105 to the rear storage unit 106 and the dust removal is completed, the control unit rotates the roller 102 in the reverse direction. The other end of the rack 101 of the filter 9 (hereinafter referred to as the second end) is meshed with the pinion gear 102 a, so that rotation is transmitted from the pinion gear 102 a to the rack 101, and the filter 9 is housed forward by the roller 102. It is conveyed to the part 105 side. As the roller 102 continues to rotate in the reverse direction, the second end portion of the rack 101 reaches the end of the front storage portion 105.

<Apparatus related to operation of movable panel 24>
FIG. 4 is a perspective view of the decorative panel. As shown in FIG. 4, the hinge connecting device 6 and the lifting device 7 are arranged on the ceiling-side surface of the decorative panel 21.

(Hinge connection device 6)
The hinge coupling device 6 supports one end of the movable panel 24 so as to be rotatable when the air conditioning indoor unit 2 is operated, and releases the support of one end of the movable panel 24 when the movable panel 24 is lowered to the maintenance position.

  FIG. 5 is an exploded perspective view of the hinge coupling device. In FIG. 5, the hinge coupling device 6 includes a rotation lever 61, a sliding member 62, a first pin 63, a pinion gear 64, a motor 65, a fixing member 66, a second pin 67, and a screw 68. The rotation lever 61 is a U-shaped member, and a rod-shaped support shaft 61a protrudes outward from the end surface. Further, a shaft hole 61 b is formed at one end of the rotation lever 61.

  The sliding member 62 includes a rack 62 a that meshes with the pinion gear 64 and an arm 62 b that sandwiches both ends of the shaft hole 61 b of the rotating lever 61. Further, the arm 62b is formed with a first sliding hole 62c, and a second sliding hole 62d is formed near the base of the rack 62a. The motor 65 is a stepping motor and rotates the pinion gear 64. The motor 65 has a through hole 65a through which the screw 68 passes.

  The fixing member 66 is formed with a sliding space 66 a that holds the sliding member 62 so as to be slidable, a gear space 66 b into which the pinion gear 64 is inserted, and a screw hole 66 c that is screwed into the screw 68. Furthermore, a first through hole 66d and a second through hole 66e are formed in the wall forming the sliding space 66a.

  The sliding member 62 is disposed in the sliding space 66 a of the fixed member 66, and the shaft hole 61 b of the rotating lever 61 is disposed between the arms 62 b of the sliding member 62. The first pin 63 is inserted from one end of the first through hole 66 d of the fixing member 66, passes through the first slide hole 62 c of the slide member 62 and the shaft hole 61 b of the rotation lever 61, and the other end of the first through hole 66 d. Get out.

  The second pin 67 is inserted from one end of the second through hole 66e, passes through the second sliding hole 62d of the sliding member 62, and exits to the other end of the second through hole 66e. As a result, the sliding member 62 can move horizontally in the sliding space along the first pin 63 and the second pin 67, and the turning lever 61 can turn around the first pin 63.

(Operation of hinge coupling device 6)
4 and 5, when the motor 65 rotates the pinion gear 64, power is transmitted to the rack 62 a meshing with the pinion gear 64, and the sliding member 62 slides along the first pin 63. Along with the movement, the rotation lever 61 moves in the direction of the movable panel 24 or in the opposite direction. Here, for convenience of explanation, the rotation of the motor 65 so as to move the rotation lever 61 in the direction to connect the movable panel 24 is called normal rotation, and the direction in which the connection between the rotation lever 61 and the movable panel 24 is released. The rotation of the motor 65 so as to move to is called reverse rotation.

  At the end of the movable panel 24, a support hole that faces the support shaft 61a is provided in the rotating lever 61, the motor 65 rotates forward, and the support shaft 61a is inserted into the support hole 24c of the movable panel 24. When the rotation lever 61 and the movable panel 24 are connected, the movable panel 24 can rotate around the first pin 63.

  On the other hand, when the motor 65 rotates in the reverse direction and the support shaft 61 a comes out of the support hole 24 c of the movable panel 24, the connection between the rotating lever 61 and the movable panel 24 is released, and the movable panel 24 moves the first pin 63. Cannot rotate to the center.

(Elevating device 7)
FIG. 6 is a layout view of components inside the lifting device. In FIG. 6, the lifting device 7 includes a wire 71, a pulley 72, a bobbin 73, a winding gear 74, a driving gear 75, a lifting motor 76, and a switch 77.

  The pulley 72 has a pulley portion 72 a and a cam portion 72 b that are integrally formed. The pulley portion 72 a supports the wire 71 and rotates as the wire 71 moves. The cam portion 72b includes a small-diameter curved surface, a large-diameter curved surface, and a plane connecting both the curved surfaces.

  The bobbin 73 winds up the wire 71. The winding gear 74 is connected coaxially with the bobbin 73 and rotates integrally. The drive gear 75 meshes with the winding gear 74 and rotates the bobbin 73.

  The elevating motor 76 is a stepping motor and rotates the drive gear 75. The number of rotations of the lifting motor 76 is controlled by the number of pulses supplied from the control unit. The control unit includes a CPU, a memory, and a motor drive circuit, and is disposed at another position away from the lifting device 7. The lifting motor 76 and the control unit are electrically connected by a wire harness.

  The switch 77 is a micro switch having a lever 77a and is turned on when the lever 77a is pressed. The lever 77a is always in contact with the cam portion 72b of the pulley 72 and is pushed when facing the large-diameter curved surface of the cam portion 72b. The switch 77 is also electrically connected to the control unit by a wire harness.

(Operation of lifting device 7)
In FIG. 6, when the lifting device 7 feeds the wire 71, the lifting motor 76 rotates the drive gear 75 in the CCW direction and rotates the winding gear 74 in the CW direction. As a result, the bobbin 73 rotates in the direction of feeding the wire 71.

  On the other hand, when the lifting device 7 winds the wire 71, the lifting motor 76 rotates the drive gear 75 in the CW direction and rotates the winding gear 74 in the CCW direction. As a result, the bobbin 73 rotates in the direction of winding the wire 71. The feeding amount and winding amount of the string are proportional to the rotation amount of the lifting motor 76, and the control unit controls the number of pulses supplied to the lifting motor 76, whereby the feeding amount and winding amount of the wire 71 are controlled. Be controlled.

  Since the movable panel 24 is connected to the tip of the wire 71, tension is always generated in the wire 71, and when the wire 71 is drawn out or wound up, the pulley portion 72a is connected to the wire 71. It is rotated by the frictional force. At this time, since the cam portion 72b also rotates, the switch 77 issues an ON signal when the lever 77a faces the large-diameter curved surface of the cam portion 72b, and issues an OFF signal when the lever 77a faces the small-diameter curved surface. While the pulley 72 is rotating, an on signal and an off signal are alternately generated, and these signals are all input to the control unit.

(Movable panel open / close operation)
FIG. 7 is a partial cross-sectional view of the air conditioning indoor unit when the movable panel opens the suction port. In FIG. 7, when the lifting device 7 feeds the wire 71 in a state where the hinge connecting device 6 is connected to the movable panel 24, the movable panel 24 is lowered by its own weight. However, since the end of the movable panel 24 is coupled to the hinge coupling device 6, the movable panel 24 rotates in the direction of opening the suction port 20 a with the first pin 63 as an axis.

  The first pin 63 is located in a space sandwiched between the inlet 20a and the outlet 20b of the main body 20, and the end of the movable panel 24 closest to the main body 20 rotates while drawing a large arc. The movable panel 24 does not interfere with the peripheral edge of the suction port 20a. Further, since the surface of the movable panel 24 near the rotation center is inclined as an inclined surface 24d so as to move away from the rotation center as it goes upward, the suction port is opened when the movable panel 24 rotates. It does not interfere with the periphery of 20a.

  When the movable panel 24 opens the suction port 20a, the portion of the movable panel 24 that has the shortest moving distance, that is, the lower surface edge closer to the rotation center of the movable panel 24, the movable panel 24 has the suction port 20a. When the door is closed, it moves below the portion that was the boundary between the main body 20 and the movable panel 24, so that the gap at the boundary between the main body 20 and the movable panel 24 is hidden when viewed from below. As a result, the design of the air conditioning indoor unit 2 is improved.

  When the lifting device 7 winds the wire 71, the movable panel 24 rises, but since the end of the movable panel 24 is connected to the hinge connecting device 6, the movable panel 24 has a suction port with the first pin 63 as an axis. It rotates to the direction which closes 20a.

(Elevating operation of movable panel)
When the hinge connecting device 6 releases the connection with the movable panel 24 and the lifting device 7 feeds the wire 71, the movable panel 24 is lowered by its own weight. When the elevating device 7 winds the wire 71, the movable panel 24 rises and closes the suction port 20a.

<Features>
(1)
In the air conditioning indoor unit 2, the first pin 63 that is the rotation center axis of the movable panel 24 is disposed at a position away from the vicinity of the boundary between the main body 20 and the movable panel 24. When the movable panel 24 opens the suction port 20a, the suction port 20a is opened while widening the gap between the main body 20 and the movable panel 24, so that the main body 20 and the movable panel 24 do not interfere with each other. As a result, the gap at the boundary between the main body 20 and the movable panel 24 when the movable panel 24 closes the suction port 20a is set small, and the design is improved.

(2)
The movable panel 24 and the first pin 63 are connected by a rotation lever 61, but the rotation lever 61 and the movable panel 24 are detachable. That is, since the first pin 63, the rotation lever 61, and the movable panel 24 do not need to be integrated, the degree of freedom in design increases.

  As described above, the present invention is useful for an air-conditioning indoor unit that supports a movable panel that can be moved up and down in the vicinity of a suction port so as to be rotatable by a hinge system and closes the suction port when operation is stopped.

The external appearance perspective view of the air-conditioning indoor unit which concerns on one Embodiment of this invention. (A) The side view at the time of operation stop of an air-conditioning indoor unit. (B) The side view at the time of the driving | running of an air-conditioning indoor unit. (C) The side view at the time of the maintenance of an air-conditioning indoor unit. Sectional drawing of an air-conditioning indoor unit. The perspective view of a makeup | decoration panel. The disassembled perspective view of a hinge coupling device. The layout of the components inside the lifting device. The fragmentary sectional view of an air-conditioning indoor unit when a movable panel opens the suction inlet.

2 Air Conditioning Indoor Unit 20 Main Body 20a Suction Port 24 Movable Panel 24d Inclined Surface 61 Rotating Lever 63 First Pin (Rotating Center Axis)

Claims (4)

A ceiling-mounted air conditioning indoor unit,
A main body (20) having an opening (20a) for sucking air during air-conditioning operation on the lower surface ;
A movable panel (24) that opens and closes the opening (20a) by closing the opening (20a) when the operation is stopped and rotating during the air conditioning operation ;
With
The rotation center axis (63) of the movable panel (24) is disposed at a position away from the vicinity of the boundary between the main body (20) and the movable panel (24),
The surface of the movable panel (24) closer to the rotation center axis (63) is an inclined surface (24d) that is inclined so as to be away from the rotation center axis (63) as it goes upward. Adjacent to the body (20),
Air conditioning indoor unit (2). Wherein mounted on the movable panel (24), further comprising a lever (61) for connecting the movable panel (24) and said rotation center shaft (63),
The air conditioning indoor unit (2) according to claim 1.   A connecting device (6) for attaching the lever (61) to the movable panel (24);
The air conditioning indoor unit (2) according to claim 2. When the movable panel (24) opens the opening (20a), the shortest moving distance of the movable panel (24) is when the movable panel (24) closes the opening (20a). To the lower part of the portion that was the boundary between the main body (20) and the movable panel (24),
The air conditioning indoor unit (2) according to any one of claims 1 to 3.

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