JP4266785B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner in which an outdoor unit and an indoor unit are connected via a refrigerant pipe to perform heat exchange, and in particular, a panel opening and closing that can open and close a front suction port formed in the indoor unit. Concerning structure.

  A torque transmission structure in which a gear unit is interposed between a driving source and a driven member and the driving force of the driving source is transmitted to the driven member via the gear unit is used in various fields. Also, a configuration in which a sector gear in which a tooth portion is formed only in a predetermined angle range is employed in one of a plurality of gears constituting the gear unit in relation to the installation space is known in the art (see, for example, Patent Document 1). ).

JP-A-8-67330

  However, when the sector gear is used, it is necessary to regulate the range of use by some method. Especially when the sector gear is configured to be detachable, the rotating shaft cannot be completely fixed, so the sector gear meshes with the sector gear. There is a possibility that the tooth skipping phenomenon occurs when the meshing of another gear is released.

  As a solution to this, in the configuration described in Patent Document 1, the swing range of the sector gear is electrically regulated using a contact switch, but a space for installing the contact switch is required. In addition, there is a problem of increasing the cost.

  The present invention has been made in view of the above-described problems of the prior art, and employs a sector gear as a part of the panel opening / closing structure and regulates the swing range of the sector gear with a simple configuration. An object of the present invention is to provide an air conditioner having a panel opening / closing structure capable of preventing the phenomenon.

In order to achieve the above object, the invention according to claim 1 of the present invention is an air conditioner including an outdoor unit and an indoor unit connected to each other via a refrigerant pipe, the indoor unit Has a casing, a heat exchanger housed in the casing, and a blower. A front panel is detachably attached to the casing, and a front suction port formed in the casing is provided. A movable panel for opening and closing is attached to the front panel via a link mechanism, and the opening and closing mechanism for the movable panel includes a drive motor, a speed reduction mechanism coupled to the drive motor, and a sector gear meshing with the speed reduction mechanism. A drive shaft connected to the sector gear and the link mechanism connected to the drive shaft, and a first stopper for restricting the swing of the sector gear when the movable panel is closed is provided on the casing of the speed reduction mechanism. Formation , During closure of the movable panel, the first stopper, it abuts against the side surface of the teeth of the opposite end of the teeth that the reduction mechanism and meshing on the edge portion of the sector gear, positioning of the sector gear A starting point is set, and a tooth skip phenomenon in which the meshing state of the sector gear and the speed reduction mechanism is released as the drive motor rotates is prevented .

Further, the invention described in claim 2 is characterized in that a stepping motor is used as the drive motor, and the rotation angle of the stepping motor when the movable panel is opened and closed is set.

The invention described in claim 3 is characterized in that a second stopper for restricting the swing of the sector gear when the movable panel is opened is formed on the casing.

According to a fourth aspect of the present invention, the second stopper is a pin formed on the casing, and the pin is brought into contact with a rib formed on the sector gear when the movable panel is opened. Features.

The invention according to claim 5 is characterized in that the speed reduction mechanism is attached in the vicinity of an end of the heat exchanger.

  According to the present invention, since the first stopper for restricting the swing of the sector gear when the movable panel is closed is formed on the casing of the speed reduction mechanism, the tooth skip phenomenon is suppressed by restricting the swing range of the sector gear with a simple configuration. Can be prevented.

  Further, since the second stopper for restricting the swing of the sector gear when the movable panel is opened is formed on the casing, the tooth skip phenomenon can be prevented by restricting the swing range of the sector gear with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1 to 3 show an indoor unit 2 of an air conditioner according to the present invention, which is connected to an outdoor unit (not shown) via a refrigerant pipe.

  The indoor unit 2 includes a frame or a casing 4 having a substantially rectangular cross-sectional shape in a direction orthogonal to the longitudinal direction, and a plurality of suction ports 6 are formed in the upper part and the front part of the casing 4. An air outlet 8 is formed in the lower part of 4. In addition, a heat exchanger 10 and a blower 11 are provided in an air passage 9 that connects the suction port 6 and the blower outlet 8, and the heat exchanger 10 is arranged in a substantially inverted V shape above the blower 11. Yes. Further, a wind direction changing blade 12 for changing the direction of the air blown into the room as appropriate is swingably attached to the air outlet 8.

  Further, a front panel 14 is detachably attached to the front surface of the housing 4 so as to cover the front suction port 6, and a plurality of (for example, three) link mechanisms 16 are attached to the front panel 14. A movable panel 18 is attached to the front suction port 6 so as to be freely opened and closed. Further, a drive motor 20 and a speed reduction mechanism (gear unit) 22 for opening and closing the movable panel 18 via the link mechanism 16 are attached to the front side near the one end of the housing 4.

  2 shows a state in which the wind direction changing blade 12 and the movable panel 18 close the air outlet 8 and the front suction port 6, respectively, and FIG. 3 shows a state in which the air direction changing blade 12 and the movable panel 18 have the air outlet 8 and the front suction port. 6 shows an open state.

  As shown in FIGS. 4 and 5, a plurality of rectangular openings 14 a are formed in a lattice shape in a portion excluding both ends of the front panel 14, and the drive shaft 24 disposed on the upper portion thereof is substantially D. It has a letter-like cross-sectional shape, and is rotatably supported by a plurality of (for example, two) drive shaft support members 26 that are integrally formed on the upper inner surface of the front panel 14 and spaced at a predetermined interval. In addition, a plurality of (for example, three) rectangular openings 14b are formed in the central portion and both ends of the front panel 14 from the central portion to the upper portion in the vertical direction, and the rectangular openings 14b are formed in link receiving holes. Function as.

  Further, the plurality of link mechanisms 16 described above are constituted by a long link 16a and a short link 16b whose intermediate portions are rotatably connected to each other, and a drive shaft 24 facing the rectangular opening 14b of the front panel 14. The upper end portion of the long link 16a constituting each link mechanism 16 is held. That is, a substantially D-shaped drive shaft insertion hole is formed in the upper end portion of the long link 16a, and the drive shaft 24 is inserted into the drive shaft insertion hole so that the drive shaft 24 is rotated. Accordingly, the long link 16a swings.

  Further, as shown in FIGS. 6 and 7, the lower end of the long link 16a is formed in a bifurcated shape, and a pair of pins projecting inwardly on the inner surface of the bifurcated lower end (see FIG. 6). (Not shown) are integrally formed. In addition, a long link attachment portion 28 is integrally formed on the inner surface of the movable panel 18, and the pair of pins described above are formed in a circular hole (not shown) formed in the long link attachment portion 28. By being loosely inserted, the lower end portion of the long link 16 a is rotatably attached to the long link attaching portion 28.

  On the other hand, the upper end portion of the short link 16b constituting the link mechanism 16 together with the long link 16a is formed in a bifurcated shape, and a pair of pins (not shown) projecting inwardly on the inner surface of the bifurcated upper end portion. And a pin 30 projecting sideways is integrally formed at the lower end of the short link 16b. Further, a short link mounting portion 32 is integrally formed in a portion of the inner surface of the movable panel 18 that is spaced apart from the long link mounting portion 28 by a predetermined length, and the short link mounting portion 32 is drilled. The upper end portion of the short link 16b is slidably and rotatably attached to the short link attachment portion 32 by loosely inserting the pin at the upper end portion of the short link 16b into the arc-shaped elongated hole 32a. Further, a rib 34 is formed around the rectangular opening 14b, which is a link receiving hole, so as to protrude rearward, and a lower end of the short link 16b is formed in a long hole 34a formed in a part of the rib 34. When the pin 30 is loosely inserted, the lower end portion of the short link 16 b is slidably and rotatably attached to the rib 34.

  Further, as shown in FIG. 8, a sector gear (fan gear) 36 having a gear portion formed only within a predetermined angle range is provided at one end of the drive shaft 24 (left side when viewed from the front, right side in FIG. 4). It is attached adjacent to the upper end of the long link 16a. That is, the sector gear 36 has a boss portion 38 having a substantially D-shaped drive shaft insertion hole 38a, and the drive shaft 24 is inserted into the drive shaft insertion hole 38a, so that the drive motor 20 is driven. The force is transmitted to the drive shaft 24 via the speed reduction mechanism 22 and the sector gear 36.

  The sector gear 36 includes an arm part 40 extending in a direction orthogonal to the boss part 38, a base part 42 extending in parallel with the arm part 40, and a gear part 44 formed on the base part 42 at the tip of the arm part 40. These are integrally formed of resin. The gear portion 44 has a plurality of (for example, five) pins 44 a erected on the base portion 42 in a circular arc shape centering on the rotation center of the sector gear 36 (center of the boss portion 38). The plurality of pins 44 a are connected to each other by arc-shaped ribs 46 at the distal end portion of the arm portion 40. That is, since the gear part 44 is not an involute gear but is composed of a plurality of pins 44a as in the prior art, the tooth tip surface of the gear part 44 has a semicircular shape.

  As shown in FIG. 4, two attachment members 48 that are vertically separated are integrally formed at each end of the front panel 14, and as shown in FIG. 1, An attachment member insertion hole 4a (only the upper insertion hole is shown in FIG. 1) is formed in the corresponding part, and the attachment member 48 of the front panel 14 is inserted into the attachment member insertion hole 4a of the housing 4. By doing so, the front panel 14 is attached to the housing 4 together with the movable panel 18.

  9 to 13 show the drive motor 20 and the speed reduction mechanism 22 attached to the heat exchanger 10. FIGS. 9 and 10 show a state where the sector gear 36 is engaged with a part of the speed reduction mechanism 22, and FIG. 9 shows a state in which the sector gear 36 is removed, FIG. 12 shows a state in which a part of the casing is notched in the state of FIG. 11, and FIG. 13 shows a state in which the sector gear 36 is fitted to and detached from a part of the speed reduction mechanism 22. Each state is shown.

  As shown in FIGS. 9 to 13, the speed reduction mechanism 22 includes a split casing 50, a first gear 52 accommodated in the casing 50, and second and third gear units 54 and 56. Yes. The casing 50 includes a first casing half 50 a fixed to the heat exchanger 10 and a second casing half 50 b that is detachable from the first casing half 50 a. The first casing half 50 a is the center of the heat exchanger 10. On the other hand, the second casing half 50 b is attached to the end side of the heat exchanger 10.

  A second gear support member 58 adjacent to the drive shaft 20a of the drive motor 20 and a third gear support member 60 adjacent to the second gear support member 58 are integrally formed on the inner surface of the first casing half 50a. Is formed. As shown in FIG. 13, the surface 50 c of the first casing half 50 a formed by projecting the second gear support member 58 and the third gear support member 60 is formed on the first casing half 50 a with respect to the heat exchanger 10. It is a flat surface extending in a direction orthogonal to the mounting surface 50d, and the drive motor 20 is fixed to the outer surface of the flat surface 50c.

  On the other hand, the second casing half 50b has a first flat surface 50e extending parallel to the flat surface 50c of the first casing half 50a, and is arranged concentrically with the drive shaft 20a of the drive motor 20 on the inner surface. The first gear support member 62 and the second gear support member 64 arranged concentrically with the second gear support member 58 of the first casing half 50a are integrally formed. Further, a third gear support arranged concentrically with the third gear support member 60 of the first casing half 50a is provided on a second flat surface 50g extending in parallel with the first flat surface 50e across an opening 50f described later. The member 66 is integrally formed.

  Further, the first gear 52 is formed as a single gear, while the second gear unit 54 and the third gear unit 56 are formed as a two-stage gear having a small diameter gear and a large diameter gear. The first gear 52 is attached to the drive shaft 20a of the drive motor 20 fixed to the upper portion of the first casing half 50a, and is supported rotatably by a first gear support member 62 formed on the second casing half 50b. Has been. On the other hand, the second and third gear units 54 and 56 are rotatable by second gear support members 58 and 64 and third gear support members 60 and 66 formed in the first and second casing halves 50a and 50b, respectively. It is supported by.

  The first gear 52 attached to the drive shaft 20 a of the drive motor 20 meshes with the large diameter gear 54 a of the second gear unit 54, and the small diameter gear 54 b of the second gear unit 54 is the large diameter of the third gear unit 56. The small gear 56b of the third gear unit 56 is meshed with the sector gear 36. For this reason, the tooth bottom surface of the small diameter gear 56b of the third gear unit 56 has a complementary shape with the tooth tip surface of the gear portion 44 of the sector gear 36, and the tooth bottom surface of the small diameter gear 56b has a semicircular shape. Further, the tooth tip surface of the small-diameter gear 56b is a convex surface having a predetermined angle (for example, 90 degrees) in order to avoid interference with the gear portion 44 when engaged with the sector gear 36 (when the front panel 14 is attached). Unlike the involute gear, there is no flat tooth tip surface. The first gear 52, the large and small diameter gears 54a and 54b of the second gear unit 54, and the large diameter gear 56a of the third gear unit 56 are formed as involute gears.

  Further, since the small diameter gear 56b of the third gear unit 56 meshes with the sector gear 36, an opening 50f is formed in the casing 50 (second casing half 50b) corresponding to the meshing portion of the small diameter gear 56b and the sector gear 36. ing. Further, a filter (not shown) is provided on the front panel 14 side of the heat exchanger 10 to prevent intrusion of dust contained in the air sucked through the opening 14a of the front panel 14. Since the speed reduction mechanism 22 is directly exposed to the air sucked through the opening 14 a of the front panel 14, dust contained in the intake air can enter the speed reduction mechanism 22 through the opening 50 f of the casing 50. There is sex. If dust enters the speed reduction mechanism 22, the operation of the speed reduction mechanism 22 may be adversely affected. Therefore, a circular dust intrusion prevention flange is provided between the large diameter gear 56 a and the small diameter gear 56 b constituting the third gear unit 56. (Partition part) 56c is formed integrally. The dust intrusion prevention flange 56c is formed so as to be substantially flush with the first flat surface 50e of the second casing half 50b described above, and the opening on this surface is a circular shape that is complementary to the dust intrusion prevention flange 56c. And the other speed reduction mechanism 22 excluding the small-diameter gear 56b of the third gear unit 56 is accommodated in a substantially sealed space by the casing 50 and the dust intrusion preventing flange 56c of the third gear unit 56, thereby Intrusion of dust into the wall is prevented.

  The first casing half 50 a has two attachment portions 68 and 70 for attachment to the heat exchanger 10, and one attachment portion 68 is near the end of the heat exchanger 10. Is inserted between a large number of fins (not shown), and the tips of the fins are locked to a part of a plurality of copper tubes penetrating the fins, while the other mounting portion 70 is formed of a large number of fins. Screwed to one of the two end plates arranged at both ends.

  For example, a stepping motor is used as the drive motor 20. In order to set the swing angle of the sector gear 36 that swings in response to the drive force of the drive motor 20, the rotation angle of the drive motor 20 is set. There is a need. Therefore, a first stopper 72 that contacts the end of the gear portion 44 of the sector gear 36 is integrally formed on a part of the above-described first flat surface 50e of the second casing half 50b. At the time of closing, the position where the sector gear 36 is in contact with the first stopper 72 is set as the positioning origin.

  Note that the gear portion 44 of the sector gear 36 is formed only within a predetermined angle range with respect to the swing center, and when the movable panel 18 swings from the open position to the closed position and contacts the housing 4 (see FIG. 10). ), The tooth tip surface located at the end of the gear portion 44 of the sector gear 36 is in surface contact with the tooth bottom surface of the small-diameter gear 56 b of the third gear unit 56. At this time, since the drive motor 20 tries to rotate further in a short time, the small-diameter gear 56b of the third gear unit 56 further rotates counterclockwise in FIG. There is a possibility that a tooth skipping phenomenon may occur in which the meshing state of the sector gear 36 and the small diameter gear 56b is released. Therefore, the first stopper 72 not only sets the positioning origin of the sector gear 36 but also acts as a tooth skip prevention means.

  Further, in consideration of the detachability of the sector gear 36 with respect to the small diameter gear 56b of the third gear unit 56, the end portion on the opposite side of the tooth located at the end portion of the gear portion 44 that contacts the small diameter gear 56b when the movable panel 18 is closed. The position of the first stopper 72 is set so that the first stopper 72 comes into contact with the side surface of the tooth.

  A sector gear 36 is attached to one end of the relatively long drive shaft 24, and there is a slight clearance between the drive shaft 24 and the drive shaft insertion hole of the long link 16a constituting each link mechanism 16. Therefore, the end of the movable panel 18 opposite to the end of the movable panel 18 located on the sector gear 36 side does not open and close completely at the same time. When the movable panel 18 is closed, the end on the opposite side is slightly delayed compared to the end of the movable panel 18 located on the sector gear 36 side, and the end of the movable panel 18 located on the sector gear 36 side is the housing. 4, when the position of the first stopper 72 is set so that the sector gear 36 contacts the first stopper 72, the opposite end of the movable panel 18 may not contact the housing 4. It looks bad. Therefore, the position of the first stopper 72 is such that after the end of the movable panel 18 positioned on the sector gear 36 abuts the housing 4, the drive motor 20 further rotates and the end on the opposite side of the movable panel 18 The sector gear 36 is positioned so as to come into contact with the first stopper 72 when it comes into contact with the housing 4.

The operation of the indoor unit 2 of the air conditioner according to the present invention having the above configuration will be described below.
As shown in FIG. 2, when the operation of the air conditioner is stopped, the movable panel 18 is in close contact with the front panel 14, and the opening 14 a of the front panel 14 is closed by the movable panel 18. At this time, the sector gear 36 is in contact with the first stopper 72 formed in the second casing half 50b, and the long links 16a and the short links 16b constituting each link mechanism 16 are arranged substantially linearly in a straight line. At the same time, it is housed in a link housing hole (rectangular opening) 14 b of the front panel 14.

  When the operation switch is turned on by the remote controller, the outdoor unit and the indoor unit 2 connected to each other through the refrigerant pipe are operated. In the indoor unit 2, the blower 11 is operated and the air direction change blade 12 is controlled to be opened ( (See FIG. 3). At the same time, the drive motor 20 rotates a predetermined number of times, and the sector gear 36 swings from the state shown in FIG. 2 to the state shown in FIG. As a result, the drive shaft 24 rotates by a predetermined angle as the sector gear 36 swings, so that the movable panel 18 is opened via the link mechanism 16. At this time, the long links 16 a constituting each link mechanism 16 swing around the axis of the drive shaft 24, and both end portions of the short links 16 b are arc-shaped long holes 32 a and ribs 34 of the short link mounting portions 32. It slides along the long hole 34a. As a result, the movable panel 18 moves substantially in parallel toward the front, but considering the appearance when the movable panel 18 is opened, the opening interval behind the upper end of the movable panel 18 is set at the lower end as shown in FIG. The lengths of the long links 16a and the short links 16b are set so as to be larger than the rear opening interval.

  Next, when the operation switch is turned off by the remote controller, the operation of the outdoor unit and the indoor unit 2 is stopped. In the indoor unit 2, the blower 11 is stopped and the air direction changing blade 12 is controlled to be closed (see FIG. 2). . At the same time, the drive motor 20 rotates a predetermined number of times, and the sector gear 36 swings a predetermined angle from the state of FIG. 3 to the state of FIG. 2 via the speed reduction mechanism 22, and the end of the sector gear 36 is the first of the second casing half 50b. After contacting the stopper 72, the drive motor 20 stops. As a result, the drive shaft 24 rotates by a predetermined angle along with the swing of the sector gear 36, so that the movable panel 18 moves substantially in parallel rearward via the link mechanism 16 and closes in close contact with the housing 4.

Embodiment 2. FIG.
The indoor unit of the air conditioner according to the present embodiment includes all the configurations of the indoor unit 2 of the air conditioner according to the first embodiment described above, and only differences are described below with reference to FIGS. 14 and 15. explain.

  The swing angle of the sector gear 36 that determines the degree of opening of the movable panel 18 uses a stepping motor as the drive motor 20 to set the rotation angle when the movable panel 18 is opened and closed, and when the movable panel 18 is closed, It is set by setting the position in contact with the first stopper 72 as the origin of positioning.

  However, the open degree of the movable panel 18 may not be constant in all indoor units due to the manufacturing accuracy of the movable panel opening / closing mechanism such as the link mechanism 16 and the speed reduction mechanism 22 and the control accuracy of the drive motor 20.

  Accordingly, in the present embodiment, as shown in FIG. 14, the second stopper 74 is provided in the second casing half 50 b and the sector gear 36 is brought into contact with the second stopper 74 when the movable panel 18 is opened. The drive motor 20 is set to stop.

  More specifically, a pin 76 is integrally formed in the vicinity of the third gear support member 66 on the inner surface of the second flat surface 50g of the second casing half 50b. On the other hand, the sector gear 36 is integrally formed with a rib 78 complementary to the pin 76 on the surface opposite to the gear portion 44 of the base portion 42 on the end portion side that contacts the first stopper 72.

  When the movable panel 18 is opened, the rib 78 of the sector gear 36 is brought into contact with the second stopper 74 so that the swing angle of the sector gear 36 is set and the degree of opening of the movable panel 18 is set.

  In the present embodiment, since the swing angle of the sector gear 36 is set by the first and second stoppers 72 and 74, it is not always necessary to use a stepping motor as the drive motor 20, and a DC motor is used. You can also

  Although the operation of the indoor unit 2 of the air conditioner according to the present embodiment having the above-described configuration is substantially the same as that of the first embodiment described above, only the operation when the movable panel 18 is opened is different.

  That is, when the operation switch is turned on by the remote controller, the drive motor 20 rotates and the sector gear 36 swings through the speed reduction mechanism 22 from the state of FIG. 2 to the state of FIG. After contacting the second stopper 74 of the two casing half 50b, the drive motor 20 stops. As a result, the drive shaft 24 rotates by a predetermined angle along with the swing of the sector gear 36, so that the movable panel 18 is moved substantially in parallel toward the front via the link mechanism 16 and released.

  The air conditioner according to the present invention employs a sector gear as a part of the panel opening and closing structure and can prevent the tooth skipping phenomenon by restricting the swing range of the sector gear with a simple configuration. It is useful as an air conditioner for industrial use.

It is a disassembled perspective view of the indoor unit which comprises the air conditioner concerning this invention. It is a longitudinal cross-sectional view of the indoor unit of FIG. 1 in a state where a movable panel is closed. It is a longitudinal cross-sectional view of the indoor unit of FIG. 1 in a state where a movable panel is opened. It is a perspective view at the time of seeing a front panel and a movable panel from the inside, and shows Embodiment 1 especially. FIG. 5 is a partially enlarged perspective view of a front panel and a movable panel in FIG. 4. It is a perspective view at the time of seeing the movable panel in Embodiment 1 from the inner side. It is a partial expansion perspective view of the movable panel of FIG. FIG. 3 is a perspective view of a part of a sector gear and a reduction mechanism that mesh with each other for opening and closing the movable panel in the first embodiment. FIG. 3 is a perspective view of a sector gear and a speed reduction mechanism that mesh with each other in the first embodiment. FIG. 10 is a partial cross-sectional view of the sector gear and the speed reduction mechanism in FIG. 9. It is a perspective view of a deceleration mechanism. FIG. 12 is a perspective view of the speed reduction mechanism of FIG. 11, showing a state in which a part of the casing is cut away. FIG. 12 is a cross-sectional view of the speed reduction mechanism of FIG. FIG. 5 is a side view of a part of a sector gear and a speed reduction mechanism that mesh with each other, and particularly shows a second embodiment. It is a perspective view of the sector gear of FIG.

Explanation of symbols

2 indoor unit, 4 housing, 4a mounting member insertion hole, 6 air inlet, 8 air outlet,
9 Air passage, 10 Heat exchanger, 11 Blower, 12 Wind direction change blade,
14 front panel, 14a opening, 14b opening (link accommodation hole),
16 link mechanism, 16a long link, 16b short link,
18 movable panel, 20 drive motor, 20a drive shaft, 22 reduction mechanism,
24 drive shaft, 26 drive shaft support member, 28 long link mounting portion, 30 pin,
32 short link attachment part, 32a long hole, 34 rib, 34a long hole,
36 sector gear, 38 boss, 38a drive shaft insertion hole, 40 arm,
42 base part, 44 gear part, 44a pin, 46 rib, 48 mounting member,
50 casing, 50a first casing half,
50b second casing half, 50c flat surface, 50d mounting surface,
50e first flat surface, 50f opening, 50g second flat surface, 52 first gear,
54 second gear unit, 54a large diameter gear, 54b small diameter gear,
56 third gear unit, 56a large diameter gear, 56b small diameter gear,
56c dust intrusion prevention flange, 58 second gear support member,
60 third gear support member, 62 first gear support member, 64 second gear support member,
66 third gear support member, 68, 70 mounting portion, 72 first stopper,
74 Second stopper, 76 pins, 78 ribs.

Claims (5)

An air conditioner including an outdoor unit and an indoor unit connected to each other via a refrigerant pipe,
The indoor unit includes a housing, a heat exchanger and a blower housed in the housing, and a front panel is detachably attached to the housing, and a front portion formed in the housing A movable panel for opening and closing the suction port is attached to the front panel via a link mechanism. The opening and closing mechanism for the movable panel includes a drive motor, a speed reduction mechanism connected to the drive motor, and a mesh with the speed reduction mechanism. A first stop that restricts swinging of the sector gear when the movable panel is closed, the speed reduction mechanism, and a drive shaft connected to the sector gear, and the link mechanism connected to the drive shaft. of forming the casing, when closure of the movable panel, this the first stopper, in contact with the side surfaces of the teeth of the opposite end of the teeth that the reduction mechanism and meshing on the edge portion of the sector gear In the air, characterized in that sets the positioning origin of the sector gear and with the rotation of the drive motor so as to prevent the tooth jump phenomenon meshed state is released with the sector gear and the speed reduction mechanism Harmony machine. Using the stepping motor as the driving motor, an air conditioner according to claim 1, characterized in that so as to set the rotation angle of the stepping motor during the opening and closing of the movable panel. The air conditioner according to claim 1 or 2 , wherein a second stopper for restricting the swing of the sector gear when the movable panel is opened is formed on the casing. The air conditioner according to claim 3 , wherein the second stopper is a pin formed on the casing, and the pin is brought into contact with a rib formed on the sector gear when the movable panel is opened. Machine. The air conditioner according to any one of claims 1 to 4 , wherein the speed reduction mechanism is attached in the vicinity of an end of the heat exchanger.

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