JP4333805B2 - Air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of an air conditioner, and more particularly to an indoor unit that closes a suction opening provided on a lower surface with a panel.

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

The center panel descends during filter maintenance and rises during operation and stop to close the central opening. That is, the central 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.
JP-A-10-196999

  In the indoor unit as described above, 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. For the purpose of improving the design, it has been studied to close the suction port when the operation is stopped. However, a new opening / closing mechanism for the suction port is required, which increases the size of the indoor unit.

  The subject of this invention is providing the indoor unit of the air conditioning apparatus excellent in the designability which utilizes the opening-and-closing whole area | region which can be opened and closed as a suction inlet, and can completely close the opening at the time of operation stop.

  An indoor unit of an air conditioner according to a first aspect of the present invention is an indoor unit of a ceiling-mounted air conditioner in which a suction opening for sucking air is located on the lower surface of the main body, and includes a panel and a lifting means. The panel is near the suction opening and descends to the first position during maintenance. The lifting / lowering means moves the panel in the upward direction and the downward direction. The lifting means moves the panel to the second position closer to the ceiling than the first position away from the suction opening during operation including the operation of sucking air from the suction opening, and when stopping, the panel is moved to the suction opening. Is moved to the third position. The panel is inclined with respect to the ceiling surface when in the second position.

  In this indoor unit, the suction opening is completely closed when stopped, and the interior of the indoor unit does not touch the human eye through the suction opening, so that the design is improved.

  An indoor unit of an air conditioner according to a second aspect of the present invention is the indoor unit of the air conditioner according to the first aspect of the present invention, further comprising panel support means for connecting the panel to the main body. The panel support means connects the panel to the main body when the panel is in the third position.

  In this indoor unit, since the panel is supported by the main body, the panel is prevented from being unstablely shaken by the vibration of the ceiling.

  An air conditioner indoor unit according to a third aspect of the present invention is the air conditioner indoor unit according to the first aspect of the present invention, further comprising panel support means for connecting the panel to the main body. The panel support means connects the panel to the main body when the panel moves between the third position and the second position.

  In this indoor unit, since the panel is supported by the main body, it is possible to prevent the panel from being unstablely shaken by vibration of the ceiling or the wind pressure of the intake air.

  An air conditioner indoor unit according to a fourth aspect of the present invention is the air conditioner indoor unit according to the first aspect of the present invention, further comprising panel support means for connecting the panel to the main body. The panel support means connects the panel to the main body when the panel is in the second position.

  In this indoor unit, since the panel is supported by the main body, it is possible to prevent the panel from being unstablely shaken by vibration of the ceiling or the wind pressure of the intake air.

  An indoor unit of an air conditioner according to a fifth aspect is the indoor unit of an air conditioner according to any one of the first to fourth aspects, wherein the lifting means lifts the panel at four points. The panel is moved to any one of the first position, the second position, and the third position by changing the descending amount or the ascending amount of the point.

  In this indoor unit, the panel posture is changed by individually changing the movement amounts of the four points. For example, the panel can be tilted so that the user can easily handle it during maintenance, which is convenient.

An indoor unit of an air conditioner according to a sixth aspect of the present invention is an indoor unit of a ceiling-mounted air conditioner in which a suction opening for sucking air is located on the lower surface of the main body, and includes a panel, a lifting means, and a panel support means. I have. The panel is near the suction opening and descends to the first position during maintenance . The elevating means lifts the panel at two points, and moves the panel in the ascending direction and the descending direction by changing the amount of descent or ascending at the two points. The panel support means rotatably supports one end of the panel in the vicinity of the suction opening, and releases the support of the end as necessary. The elevating means moves the panel to a second position closer to the ceiling than the first position away from the suction opening during operation including the operation of sucking air from the suction opening, and closes the panel when the operation is stopped. Move to position 3. The panel support means supports the end of the panel when the panel moves between the third position and the second position, and supports the end of the panel when the panel moves from the third position to the first position. Is released.

  In this indoor unit, since the panel is supported at one end at the second position during operation, the panel is prevented from being unstablely shaken by vibration of the ceiling or wind pressure of the intake air. In addition, when the engine is stopped, the suction opening is completely closed, and the interior of the indoor unit is not touched by human eyes through the suction opening, so that the design is improved.

  An indoor unit for an air conditioner according to a seventh aspect is the indoor unit for an air conditioner according to the sixth aspect, wherein the panel support means includes a first rotation support part and a second rotation support part. A 1st rotation support part is provided in the edge part of a panel, and comprises the rotation center of a panel. The second rotation support portion is fitted to the first rotation support portion and rotatably supports the first rotation support portion. And the control part which controls the movement of the rotation center axis direction of a panel is provided in the 2nd rotation support part.

  In this indoor unit, shaking in the direction of the rotation axis of the panel due to vibration of the ceiling and wind pressure of the intake air is prevented.

  An indoor unit for an air conditioner according to an eighth aspect is the indoor unit for an air conditioner according to the seventh aspect, further comprising a filter and a filter support state switching means. The filter removes dust contained in the air sucked from the suction opening. The filter support state switching means supports the filter on either the panel or the main body. The filter support state switching means supports the filter on the main body when the panel moves from the third position to the second position.

  In this indoor unit, since the panel and the filter are separated at times other than during maintenance, the panel is lightweight, the vertical load acting on the lifting means is reduced, and the mechanical durability is improved.

  An indoor unit of an air conditioner according to a ninth aspect is the indoor unit of an air conditioner according to the eighth aspect, wherein the filter support state switching means includes a slide member and a cam member. The slide member is slidably held by the filter and protrudes when supported by a part of the main body. The cam member pushes the slide member.

  In this indoor unit, since the filter is supported by the main body when the slide member is pushed, the mechanism for supporting the filter on the main body is simplified, and the increase in size and cost of the filter support state switching means are suppressed.

  An indoor unit of an air conditioner according to a tenth aspect of the invention is an indoor unit of an air conditioner according to the ninth aspect of the invention, wherein the panel support means drives the second rotation support part to move toward the first rotation support part. It further has a part. The filter support state switching unit further includes a drive unit that moves the cam member toward the slide member. And the drive part of a panel support means and the drive part of a filter support state switching means are common.

  In this indoor unit, the space occupied by the drive unit is reduced, and an increase in the size of the indoor unit is suppressed.

In the indoor unit of the air conditioner according to the first aspect of the invention, the suction opening is completely closed when stopped, and the interior of the indoor unit is not exposed to the human eye through the suction opening, so that the design is improved.

  In the indoor unit of an air conditioner according to any one of the second to fourth inventions, the panel is supported by the main body, so that the panel is unstablely swayed by vibration of the ceiling, wind pressure of sucked air, or the like. Is prevented.

  In the indoor unit of the air conditioner according to the fifth aspect of the invention, the panel posture is changed by individually changing the movement amount of each of the four points of the panel. For example, the panel is tilted so that the user can easily handle it during maintenance. It is easy to use.

  In the indoor unit of the air conditioner according to the sixth aspect of the invention, since the panel is supported at one end at the second position during operation, the panel is prevented from unstablely shaking due to vibration of the ceiling and wind pressure of the intake air. The In addition, when the engine is stopped, the suction opening is completely closed, and the interior of the indoor unit is not touched by human eyes through the suction opening, so that the design is improved.

  In the indoor unit of the air conditioner according to the seventh aspect of the invention, the vibration of the panel due to the vibration of the ceiling, the wind pressure of the intake air, etc., is prevented.

  In the indoor unit of the air conditioner according to the eighth aspect of the invention, since the panel and the filter are separated except during maintenance, the panel is lightweight, the vertical load acting on the lifting means is reduced, and the mechanical durability is reduced. Improves.

  In the indoor unit of the air conditioner according to the ninth aspect of the invention, the filter is supported by the main body by pressing the slide member, so the mechanism for supporting the filter on the main body is simplified, the size of the filter support state switching means is increased, High cost is suppressed.

  In the indoor unit of the air conditioner according to the tenth aspect, the space occupied by the drive unit is reduced, and the increase in size of the indoor unit is suppressed.

  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.

[First Embodiment]
<Indoor unit>
FIG. 1A is a perspective view when the operation of the indoor unit according to the first embodiment of the present invention is stopped, and FIG. 1B is a perspective view when the indoor unit is operated. 1 (a) and 1 (b), an indoor unit 2 of an air conditioner has a main body 20 having a suction opening 21 and an air outlet 22 on the lower surface, a flat panel 4 that opens and closes the suction opening 21, and suction from the suction opening 21. A filter 6 is provided for removing dust contained in the air. The suction opening 21 and the air outlet 22 are adjacent to each other, and the area of the suction opening 21 is larger than that of the air outlet 22 and occupies a considerable range of the lower surface of the main body 20.

(Flat panel 4)
The flat panel 4 has such a size that the entire suction opening 21 can be closed, and is suspended by two strings 71 extending from the main body 20 side. The two cords 71 support both ends in the longitudinal direction of the flat panel 4, and the cord 71 that lifts the front end in FIG. 1 (b) is in the vicinity of the first end 4 a away from the air outlet 22. The string 71 that is connected and lifts the end on the back side in FIG. 1B is connected to the vicinity of the second end 4b close to the outlet 22.

  During operation, the flat panel 4 descends to open the suction opening 21, but the amount of descending is different between the first end 4a and the second end 4b, and the first end 4a is larger than the second end 4b. Since it descends, the flat panel 4 rotates so as to be inclined with respect to the ceiling surface, and opens the suction opening 21.

(Filter 6)
FIG. 2 is a perspective view of the filter. In FIG. 2, the filter element 6c is held by a frame 6a. Moreover, the long sides which the flame | frame 6a opposes are connected by the reinforcement arm 6b, and the bending of a long side is suppressed.

  The filter element 6c is a net-like member obtained by pleating a polyethylene terephthalate fiber (hereinafter referred to as PET fiber). It is molded into a shape.

  By thinning the fiber of the filter element 6c, the ventilation resistance can be lowered without deteriorating the performance of removing the dust of the filter 6, but the strength to maintain the fiber fold is weakened. However, it also has the function of maintaining the fold mountain. Further, fibers having different materials and diameters may be interwoven between the PET fibers so as to increase the strength for maintaining the fiber crease.

  FIG. 3 is a perspective view during maintenance of the indoor unit according to the first embodiment of the present invention. In FIG. 3, the flat panel 4 can be lowered and raised with the filter 6 mounted thereon, and the user can remove the filter 6 and clean it without looking up at the ceiling.

  A string 71 for lifting the flat panel 4 is connected to the lifting unit 7. When the elevating unit 7 feeds the string 71, the flat panel 4 is lowered, and when the string 71 is wound up, the flat panel 4 is raised.

  For convenience, a position at which the user can remove the filter 6 from the flat panel 4 without climbing on a stand or the like during maintenance is referred to as a maintenance position. Further, a position where the flat panel 4 opens the suction opening 21 during operation is called an open position, and a position where the flat panel 4 closes the suction opening 21 when operation is stopped is called a closed position.

(Elevating unit 7)
FIG. 4 is a front view of the inside of the lifting unit. In FIG. 4, the lifting unit 7 includes a pulley 72, a take-up gear 73, a drive gear 74, a motor 75 and a switch 76 in addition to the string 71.

  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 string 71 and rotates as the string 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.

  In the winding gear 73, a bobbin 73a and a gear portion 73b for winding the string 71 are integrally formed. The drive gear 74 meshes with the gear portion 73b of the winding gear 73 and rotates the bobbin 73a.

  The motor 75 is a stepping motor and rotates the drive gear 74. The number of rotations of the motor 75 is controlled by the number of pulses supplied from the control unit 10. The control unit 10 includes a CPU, a memory, and a motor drive circuit, and is disposed at another position away from the lifting unit 7. The motor 75 and the control unit 10 are electrically connected by a wire harness.

  The switch 76 is a micro switch having a lever 76a and is turned on when the lever 76a is pressed. The lever 76a 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 76 is also electrically connected to the control unit 10 by a wire harness.

(Operation of the lifting unit 7)
In FIG. 4, when the lifting unit 7 feeds the string 71, the motor 75 rotates the drive gear 74 in the CW direction. As a result, the winding gear 73 rotates in the direction in which the string 71 is fed out. On the other hand, when the elevating unit 7 winds the string 71, the motor 75 rotates the drive gear 74 in the CCW direction. As a result, the winding gear 73 rotates in the direction of winding the string 71. The string feeding amount and winding amount are proportional to the rotation amount of the motor 75, and the control unit 10 controls the number of pulses supplied to the motor 75 to control the feeding amount and winding amount of the string 71. Is done.

  Since the flat panel 4 is connected to the tip of the string 71, tension is always generated in the string 71. It rotates by frictional force. At this time, since the cam portion 72b also rotates, the switch 76 issues an ON signal when the lever 76a faces the large diameter curved surface of the cam portion 72b, and issues an OFF signal when the lever 76a 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 10.

  However, when the string 71 is loosened due to some reason and the tension is lost, for example, when the flat panel 4 is lowered by feeding the string 71 for maintenance, before the flat panel 4 reaches the predetermined feeding amount, When landing on a table or the like and stopping, the frictional force between the string 71 and the pulley portion 72a decreases, and the pulley 72 stops. For this reason, either the on signal or the off signal is continuously output from the switch 76. At this time, since the signal from the switch 76 is constant when the motor 75 is rotating, the control unit 10 estimates that the flat panel 4 has been stopped by some obstacle, and immediately stops the motor 75. Let

(Panel support means 8 and filter support state switching means 9)
FIG. 5 is a partial perspective view when the inside of the indoor unit in FIG. 1A is viewed from above. In FIG. 5, the flat panel 4 is provided with ribs 41 and bearings 42. A hole 41a and a groove 41b are formed in the rib 41, and the tip of the string 71 is connected to the hole 41a. The bearing 42 is formed to be a long hole.

  The frame 6a of the filter 6 is fixed to the second frame 61, and the second frame 61 is detachably supported on the flat panel 4. A slide member 62 slidable in the direction of arrow B is accommodated at the end of the second frame 61. The slide member 62 has an inclined portion 62a, a protruding portion 62b, and a locking portion 62c. In FIG. 5, the protrusion 62 b of the slide member 62 is fitted in the groove 41 b of the rib 41, so that the filter 6 is supported by the flat panel 4.

  A drive unit 50, a shaft 43, and a push cam 63 are installed above the flat panel 4. The drive unit 50 can move the shaft 43 and the push cam 63 in the direction of arrow A. At this time, the shaft 43 is inserted into the bearing 42 and the flat panel 4 is rotatably supported by the shaft 43. This series of operations is a connecting operation, and the bearing 42, the shaft 43 and the drive unit 50 serve as the panel support means 8.

  At the same time that the shaft 43 is inserted into the bearing 42, the push cam 63 is inserted into the second frame 61 while pushing the inclined portion 62 a of the slide member 62. At this time, the protrusion 62b is disengaged from the groove 41b, and the locking portion 62c is hung on the main body 20. As a result, the filter 6 supported by the flat panel 4 is supported by the main body 20. This series of operations is a switching operation, and the slide member 62, the push cam 63, and the drive unit 50 become the filter support state switching means 9.

(Drive unit 50)
FIG. 6 is a cross-sectional view showing the inside of the drive unit. In FIG. 6, the drive unit 50 includes a case 51, a motor 52, a pinion gear 53, a rack 54 and a crankshaft 55. The interior of the case 51 is partitioned into three sections, a first section 511, a second section 512, and a third section 513. The motor 52 is a stepping motor, and the number of rotations is controlled by the number of pulses supplied from the control unit 10. The motor 52 is housed in the first section 511, but the rotation axis is in the second section 512.

  The pinion gear 53 and the rack 54 are housed in the second section 512 in a state of being engaged with each other. Since the pinion gear 53 is connected to the rotating shaft of the motor 52, the pinion gear 53 rotates by the rotation of the motor 52, and the rack 54 slides.

  The crankshaft 55 has one rotation center shaft 55a and three crankshafts 551, 552, and 553. The rotation center shaft 55 a is supported by the third section 513, and the first crank shaft 551 is connected to the rack 54. Further, the second crankshaft 552 is connected to the shaft 43, and the third crankshaft 513 is connected to the push cam 63.

(Operation of drive unit 50)
In FIG. 6, when the motor 52 rotates the pinion gear 53 in the C direction, the rack 54 slides in the D direction. At this time, since the first crankshaft 551 connected to the rack 54 also moves in the D direction, the crankshaft 55 rotates in the E direction about the rotation center shaft 55a. As a result, the second crankshaft 552 pushes the shaft 43 in the direction of arrow A, and the third crankshaft 553 pushes the push cam 63 in the direction of arrow A.

(Slide member 62)
FIG. 7 is a perspective view of the second frame and the slide member. In FIG. 7, the slide member 62 has an inclined portion 62a, a protruding portion 62b, a locking portion 62c, and a square hole 62d. A stop plate 61a of the second frame 61 is inserted into one end of the square hole 62d, and a coil spring 64 is disposed between the stop plate 61a and the other end of the square hole 62d. When the inclined portion 62a is pushed by the push cam 63 (see FIG. 5) and the slide member 62 moves in the direction of arrow B, the coil member 64 moves while compressing. Receives drag in the opposite direction.

(Operation of the slide member 62)
FIG. 8 is a perspective view showing a state in which the shaft and the push cam of FIG. 5 are moved. In FIG. 8, when the push cam 63 pushes the inclined portion 62 a of the slide member 62, a force in the arrow B direction acts on the slide member 62 and moves. By this movement, the protrusion 62b is detached from the groove 41b, and the support of the flat panel 4 with respect to the filter 6 is released. At the same time, the locking portion 62c protrudes and hangs on the main body 20, so that the filter 6 is supported by the main body 20.

(Operation of flat panel 4 during operation)
FIG. 9 is a perspective view showing a state in which the flat panel of FIG. 8 is opened. In FIG. 9, when the string 71 is unwound, the flat panel 4 is lowered by its own weight. Since the bearing 42 is formed into a long hole, there is a vertical clearance between the bearing 42 and the shaft 43 even when the shaft 43 is inserted into the bearing 42. As a result, the second end portion 4 b of the flat panel 4 is lowered and stopped by the vertical clearance between the bearing 42 and the shaft 43. Thereafter, the first end 4a of the flat panel 4 is lowered by a predetermined distance while rotating around the shaft 43, and the suction opening 21 is opened. In addition, in order to restrict the movement of the flat panel 4 in the axial direction on the shaft 43, a restricting portion 43 a made of a cylinder having a larger diameter than the shaft 43 is formed.

  On the other hand, when the string 71 is wound from the open state, the first end 4a rotates in the direction of closing the suction opening 21 around the shaft 43, and the first end 4a and the second end 4b are the same. When the height is reached, the flat panel 4 becomes substantially horizontal, and then both the first end 4a and the second end 4b rise by the clearance between the bearing 42 and the shaft 43, and the suction opening 21 is opened. close.

  The operation in which the flat panel 4 rotates about the shaft 43 to open the suction opening 21 is when the indoor unit 2 starts operation. At this time, the filter 6 includes the locking portion 62c of the slide member 62 as the main body. 20 does not follow the operation of the flat panel 4.

(Operation of flat panel 4 during maintenance)
When performing maintenance such as cleaning of the filter 6, the string 71 is unwound from the state shown in FIG. The state of FIG. 5 is a state in which the protrusion 62b is fitted in the groove 41b and the filter 6 is connected to the flat panel 4, and the flat panel 4 and the filter 6 can be lowered together. Further, since the shaft 43 is not inserted into the bearing 42, the flat panel 4 can be lowered horizontally without rotating.

<Features>
(1)
In the indoor unit 2, since the elevating unit 7 moves the flat panel 4 to the open position during operation and moves the flat panel 4 to the closed position when stopped, the suction opening 21 is completely closed during the stop and passes through the suction opening 21. The interior of the indoor unit 2 is not exposed to human eyes.

(2)
In the indoor unit 2, when the elevating unit 7 lifts and moves the flat panel 4 at two points, and the flat panel 4 moves between the closed position and the open position, the bearing 42 of the flat panel 4 is supported by the shaft 43. The As a result, the flat panel 4 is prevented from unstablely shaking due to the vibration of the ceiling and the wind pressure of the intake air. The shaft 43 is provided with a restricting portion 43a for restricting the flat panel 4 from moving in the axial direction, and the flat panel 4 is prevented from shaking in the axial direction due to vibration of the ceiling, wind pressure of sucked air, or the like. It is preventing.

(3)
In the indoor unit 2, when the flat panel 4 moves from the closed position to the open position, the push cam 63 pushes the slide member 62 to project the projecting portion 62 c and support the filter 6 on the main body 20. That is, since the flat panel 4 and the filter 6 are separated at times other than during maintenance, the flat panel 4 becomes lighter, the vertical load acting on the elevating unit 7 is reduced, and the mechanical durability is improved. Further, the mechanism for supporting the filter 6 on the main body 20 is simplified, and an increase in size and cost is suppressed.

(4)
In the indoor unit 2, one drive unit 50 moves the shaft 43 toward the bearing 42 and moves the push cam 63 toward the slide member 62. As a result, the space occupied by the drive unit is reduced, and the increase in size of the indoor unit is suppressed.

<First Modification of First Embodiment>
Here, means for stabilizing the posture of the flat panel 4 will be described. FIG. 10 is a perspective view during operation of the indoor unit according to the first modification, and FIG. 11 is a perspective view during maintenance of the indoor unit. In addition, about the components similar to 1st Embodiment, the same code | symbol is provided and description is abbreviate | omitted.

  In FIG. 10, a guide plate 46 is provided on the flat panel 4. When the indoor unit 2 stops operating and the flat panel 4 is in the closed position, the guide plate 46 is housed inside the main body 20. The guide plate 46 follows the operation of the flat panel 4 and comes out of the guide hole 26 of the main body 20. When the flat panel 4 is in the open position, since the guide hole 26 supports the guide plate 46, the posture of the flat panel 4 becomes unstable due to the shaking of the ceiling or the pressure of the air sucked from the suction opening 21. There is nothing.

  Since the movement of the guide plate 46 in the vertical direction is not restricted, when the flat panel 4 is lowered to the maintenance position at the time of maintenance, it is lowered together with the flat panel 4 as shown in FIG.

<Second Modification of First Embodiment>
In the first embodiment, the flat panel 4 is lifted and lowered by the two strings 71, but may be lifted and lowered by four strings.

  FIG. 12 is a perspective view of the indoor unit according to the second modified example during operation, and FIG. 13 is a perspective view of the indoor unit during maintenance. In FIGS. 12 and 13, the flat panel 4 is suspended by four strings 71, and moves to an open position or a maintenance position by changing the feeding amount of the strings 71.

  When the position of the flat panel 4 is changed, the flat panel 4 is always moved to the closed position, the suction opening 21 is closed, and the support state of the filter 6 is switched. For example, when moving the flat panel 4 from the open position to the maintenance position, the suction opening 21 is closed, the connection between the filter 6 and the main body 20 is released, and the filter 6 is connected to the flat panel 4 and then lowered to the maintenance position. Let me.

  When the flat panel 4 is moved from the maintenance position to the open position, the suction opening 21 is closed, the connection between the filter 6 and the flat panel 4 is released, and the filter 6 is connected to the main body 20 and then lowered to the open position. Let me. Since the connection and release of the filter 6 are performed by operating the slide member 62 with the push cam 63 in the same manner as in the above embodiment, the description thereof is omitted here.

  In addition, the attitude | position of the flat panel 4 is not limited to horizontal, You may make it incline by making two feeding amounts in the four strings 71 differ. FIG. 14 is a perspective view during operation of another indoor unit according to the second modified example. In FIG. 14, the string 71 on the first end 4a side of the flat panel 4 is extended and the second end 4b side is extended. The cord 71 is drawn out short. As a result, the flat panel 4 is in a state where the first end portion 4a side is largely opened.

  Further, since the posture of the flat panel 4 can be changed, the flat panel 4 can be tilted so that the user can easily handle it during maintenance, for example, and the usability is good.

[Second Embodiment]
In the first embodiment, the filter 6 is supported on one of the flat panel 4 and the main body 20 by the switching operation of the filter support state. However, the present invention is not limited to this. In the second embodiment, an indoor unit that can open and close the suction opening 21 in a state where the filter 6 is always connected to the flat panel 4 will be described. In addition, about the component similar to 1st Embodiment, the same code | symbol is provided and description is abbreviate | omitted.

  FIG. 15 is a perspective view during maintenance of the indoor unit according to the second embodiment of the present invention. In FIG. 15, in the flat panel 4, the filter 6 is connected by a spring 11, and four corners of the flat panel 4 are suspended by strings 71. The spring 11 is a torsion coil spring. One end is fixed near the end of the flat panel 4, and the other end is fixed near the end of the filter 6.

  When the flat panel 4 closes the suction opening 21, the filter 6 cannot rise upward from the positioning plate 25 of the main body 20. Therefore, when the flat panel 4 is raised to the closed position by the lifting unit 7, the flat panel 4 4 overlaps with the filter 6 while bending the spring 11 and closes the suction opening 21.

  When the string 71 on the first end 4 a side of the flat panel 4 is drawn out by the elevating unit 7, the first end 4 a of the flat panel 4 is separated from the suction opening 21. At this time, the filter 6 cannot be separated from the positioning plate 25 side until the bending of the spring 11 is completely released. In this state, the indoor unit 2 is operated.

<Modification of Second Embodiment>
Next, a modified example in which the second embodiment is further simplified will be described. 16A is a side view when the indoor unit according to the modification of the second embodiment is stopped, FIG. 16B is a side view when the indoor unit is in operation, and FIG. 16C is the side view of the indoor unit. It is a side view at the time of maintenance.

  In FIG. 16 (a), the filter 6 is fixed to the flat panel 4 while being inclined at a predetermined angle with respect to the flat panel 4. When the flat panel 4 is in the closed position, the filter 6 is tilted inside the main body 20 and is stationary. is doing.

  During operation, the lifting unit 7 feeds the string 71 on the first end 4a side of the flat panel 4 so that the first end 4a of the flat panel 4 is lowered to its open position by its own weight, and the second end 4b is centered. And the suction opening 21 is opened. The lifting unit 7 feeds the string 71 until the filter 6 is horizontal.

  At the time of maintenance, after the lifting unit 7 moves the flat panel 4 to the closed position, the flat panel 4 is moved to the maintenance position as shown in FIG. Can descend horizontally.

[Others]
Note that the movement of the flat panel 4 to the maintenance position is not limited to the time of maintenance, but when performing a demonstration for moving the flat panel 4 of the indoor unit 2 according to the present invention to the maintenance position. Is also implemented.

  Similarly, moving the flat panel 4 to the open position is not limited to the time of operation, but when performing demonstration for moving the flat panel 4 of the indoor unit 2 according to the present invention to the open position. Also implemented.

  As described above, according to the present invention, when the operation is stopped, the suction opening is closed, and the interior of the indoor unit is not exposed to the human eye through the suction opening. Therefore, the present invention is useful for an indoor unit installed in a living space with an emphasis on design. It is.

(A) The perspective view at the time of the operation stop of the indoor unit which concerns on 1st Embodiment of this invention. (B) The perspective view at the time of operation | movement of the indoor unit. The perspective view of a filter. The perspective view at the time of the maintenance of the indoor unit which concerns on 1st Embodiment of this invention. The front view inside a raising / lowering unit. The partial perspective view when the inside of the indoor unit of Fig.1 (a) is seen from upper direction. Sectional drawing which shows the inside of a drive unit. The perspective view of the 2nd frame and a slide member. The perspective view of the state which moved the axis | shaft and push cam of FIG. The perspective view of the state which opened the flat panel of FIG. The perspective view at the time of the driving | operation of the indoor unit which concerns on a 1st modification. The perspective view at the time of the maintenance of the indoor unit which concerns on a 1st modification. The perspective view at the time of the operation | movement of the indoor unit which concerns on a 2nd modification. The perspective view at the time of the maintenance of the indoor unit which concerns on a 2nd modification. The perspective view at the time of the driving | operation of the other indoor unit which concerns on a 2nd modification. The perspective view at the time of the maintenance of the indoor unit which concerns on 2nd Embodiment of this invention. (A) The side view at the time of the stop of the indoor unit which concerns on the modification of 2nd Embodiment. (B) The side view at the time of the operation | movement of the indoor unit. (C) The side view at the time of the maintenance of the indoor unit.

2 Indoor unit 4 Flat panel 6 Filter 7 Lifting unit (lifting means)
8 Panel support means 9 Filter support state switching means 20 Main body 21 Suction opening 42 Bearing (first rotation support portion)
43 shaft (second rotation support part)
43a Regulator 50 Drive unit 62 Slide member 63 Push cam

Claims (10)

An indoor unit of a ceiling-mounted air conditioner in which a suction opening (21) for sucking air is located on the lower surface of the main body (20),
A panel (4) in the vicinity of the suction opening (21) and lowered to the first position during maintenance;
Elevating means (7) for moving the panel (4) in the upward and downward directions;
With
The lifting means (7)
During operation including the operation of sucking air from the suction opening (21), the panel (4) is moved to a second position closer to the ceiling than the first position away from the suction opening (21),
When stopped, move the panel (4) to a third position that closes the suction opening (21);
The panel (4) is inclined with respect to the ceiling surface when in the second position,
Air conditioner indoor unit (2). Panel support means (8) for connecting the panel (4) to the body (20);
The panel support means (8) connects the panel (4) to the main body (20) when the panel (4) is in the third position.
The indoor unit (2) of the air conditioning apparatus according to claim 1. Panel support means (8) for connecting the panel (4) to the body (20);
The panel support means (8) connects the panel (4) to the body (20) when the panel (4) moves between the third position and the second position.
The indoor unit (2) of the air conditioning apparatus according to claim 1. Panel support means (8) for connecting the panel (4) to the body (20);
The panel support means (8) connects the panel (4) to the main body (20) when the panel (4) is in the second position.
The indoor unit (2) of the air conditioning apparatus according to claim 1. The elevating means (7) lifts the panel (4) at four points and changes the lowering or raising amount of the four points, thereby moving the panel (4) to the first position, the second position, and Move to one of the third positions,
The indoor unit (2) of the air conditioning apparatus according to any one of claims 1 to 4. An indoor unit of a ceiling-mounted air conditioner in which a suction opening (21) for sucking air is located on the lower surface of the main body (20),
A panel (4) in the vicinity of the suction opening (21) and moving to a first position during maintenance ;
Lifting means (7) for lifting the panel (4) at two points and moving the panel (4) in the ascending direction and the descending direction by changing the amount of descent or ascending of the two points;
Panel support means (8) for rotatably supporting one end portion of the panel (4) in the vicinity of the suction opening (21), and releasing support of the end portion as necessary;
With
The lifting means (7)
During operation including the operation of sucking air from the suction opening (21) , the panel (4) is moved to a second position closer to the ceiling than the first position away from the suction opening (21),
When stopped, move the panel (4) to a third position that closes the suction opening (21);
The panel support means (8)
When the panel (4) moves between the third position and the second position, the end of the panel (4) is supported,
When the panel (4) moves from the third position to the first position, the support of the end of the panel (4) is released;
Air conditioner indoor unit (2). The panel support means (8)
A first rotation support portion (42) provided at the end of the panel (4) and forming a rotation center of the panel (4);
A second rotation support portion (43) that fits with the first rotation support portion (42) and rotatably supports the first rotation support portion (42);
Have
The second rotation support portion (43) is provided with a restriction portion (43a) for restricting movement of the panel (4) in the rotation center axis direction.
The indoor unit (2) of the air conditioning apparatus according to claim 6. A filter (6) for removing dust contained in the air sucked from the suction opening (21);
Filter support state switching means (9) for supporting the filter (6) on either the panel (4) or the main body (20);
Further comprising
The filter support state switching means (9) causes the body (20) to support the filter (6) when the panel (4) moves from the third position to the second position.
The indoor unit (2) of the air conditioning apparatus according to claim 7. The filter support state switching means (9)
A slide member (62) that protrudes and is supported by a part of the main body (20) when being slidably held by the filter (6) and a cam member (63) that pushes the slide member (62) )When,
have,
The indoor unit (2) of the air conditioning apparatus according to claim 8. The panel support means (8) further includes a drive unit that relatively moves the second rotation support part (43) and the first rotation support part (42),
The filter support state switching means (9) further includes a drive unit that relatively moves the cam member (63) and the slide member (62),
The drive part of the panel support means (8) and the drive part of the filter support state switching means (9) are common.
The indoor unit (2) of the air conditioning apparatus according to claim 9.

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