KR20050049307A - Air conditioner - Google Patents

Abstract

In an air conditioner having an indoor unit with a movable panel, a simple configuration prevents dust from entering the gear portion provided between the driving source and the movable panel. The opening / closing mechanism of the movable panel includes a drive motor, a reduction mechanism connected to the drive motor, a sector gear engaged with the reduction mechanism, a drive shaft connected to the sector gear, and a link mechanism connected to the drive shaft. Made up by. In addition, the reduction mechanism is accommodated in casings 50 (50a and 50b) having an opening, while a portion 56b of the reduction mechanism is exposed from the opening to engage with the sector gear to engage the sector gear 56b of the reduction mechanism. ) Is formed integrally with a partition portion 56c for preventing the ingress of dust.

Description

Air Conditioner {AIR CONDITIONER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner in which an outdoor unit and an indoor unit are connected through a refrigerant pipe to perform heat exchange, and more particularly, to a panel opening and closing structure that enables opening and closing of a front suction port formed in an indoor unit.

A plurality of blades for changing the wind direction are provided at the air outlet of the indoor unit, and these plurality of blades are driven by a motor through a rotating shaft, a gear, and the like. In addition, the air flow path in which the blades are installed has a high possibility of dust passing therein, and the gear is isolated from the air flow path in which the blades are arranged by inserting a rear guider (for example, a patent). See Document 1).

That is, when dust invades gears or the like, it may cause malfunction, and means for preventing the ingress of dust have been devised.

(Patent Document 1)

Japanese Patent Application Laid-Open No. 10-227519

In recent years, a front panel is attached to the front panel of an indoor unit frame body, and a movable panel for opening and closing the front air inlet of the frame body is also attached to the front panel. In the case of an indoor unit having a gear, the gears on the main body side need to be exposed because the gears are disengaged from each other due to the opening and closing of the front panel at the time of taking out the filter. When such a gear portion is arranged on the suction side of the blower, there is a high possibility that dust may enter the gear portion, and there is a risk of causing a malfunction of the gear due to the intruded dust. Therefore, as described in Patent Document 1, dust It is necessary to find a means to prevent the intrusion of

This invention is made | formed in view of such a problem which the prior art has, and in the air conditioner which has an indoor unit with a movable panel, it prevents invasion of the dust in the gear part installed between a drive source and a movable panel with a simple structure. An object of the present invention is to provide an air conditioner having a panel opening and closing structure.

In order to achieve the above object, the invention described in claim 1 of the present invention is an air conditioner having an outdoor unit and an indoor unit connected to each other via a refrigerant pipe, wherein the indoor unit is a heat exchanger accommodated in the frame and the inside of the frame. A front panel is detachably attached to the frame body, and a movable panel for opening and closing the front suction port formed in the frame body is attached to the front panel through a link mechanism. The mechanism includes a drive motor, a deceleration mechanism connected to the drive motor, a drive gear engaged with the deceleration mechanism, a drive shaft connected to the drive gear, and the link mechanism connected to the drive shaft. Is housed in a casing having an opening, and a part of the deceleration mechanism is exposed from the opening A partition portion for engaging the drive gear and preventing dust from entering the portion of the reduction mechanism is integrally formed.

In addition, in the invention described in claim 2, the opening of the casing exhibits a circular shape, and the part of the reduction mechanism is the small diameter gear of a two-stage gear having a large diameter gear and a small diameter gear, and the partition And the circular dust intrusion prevention flange integrally formed between the large diameter gear and the small diameter gear.

The invention described in claim 3 has two flat surfaces in which the casing extends in parallel, and the dust intrusion preventing flange is formed so as to be substantially coincident with one of the two flat surfaces. It is done.

In addition, the invention described in claim 4 forms the large diameter gear as an involute gear, while the tooth bottom surface of the small diameter gear and the toothed end surface of the drive gear are It is characterized by being formed in a semicircle.

The invention described in claim 5 is characterized in that the deceleration mechanism is attached near an end of the heat exchanger.

According to the present invention, since a part of the reduction mechanism accommodated in the casing having the opening is exposed from the opening to be engaged with the drive gear, and a partition portion for preventing the intrusion of dust is integrally formed in the part of the reduction mechanism, the intrusion of dust It is possible to prevent the malfunction of the gear caused by the.

In addition, the above-mentioned part of the reduction mechanism is a small diameter gear of the two-stage gear, and the partition portion is constituted by a dust penetration preventing flange integrally formed between the large diameter gear and the small diameter gear, and its shape is the same as that of the opening of the casing. Since it is circular in shape, dust can be prevented by a simple configuration.

Moreover, since the dust intrusion prevention flange was formed so that it might become a surface substantially coinciding with one of the two flat surfaces which comprise the side wall of a casing, intrusion of dust can be reliably prevented by the simple flange shape.

EMBODIMENT OF THE INVENTION Below, embodiment of this invention is described, referring drawings.

1 to 3 show the indoor unit 2 of the air conditioner according to the present invention, and are connected to an outdoor unit (not shown) through a refrigerant pipe.

The indoor unit 2 has a frame or frame 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 and front portions of the frame 4. At the same time, a blowout port 8 is formed in the lower part of the frame 4. In addition, a heat exchanger 10 and a blower 11 are provided in the air passage 9 that communicates the inlet 6 and the blower outlet 8, and the heat exchanger 10 is substantially reversed above the blower 11. (Iii) It is arrange | positioned in V shape. Further, the wind direction changing blades 12 for freely changing the direction of the air blown into the chamber are freely attached to the blowout port 8.

In addition, the front panel 14 is detachably attached to the front surface of the frame 4 so as to cover the front suction port 6, and the front panel 14 includes a plurality of (for example, three) pieces. The movable panel 18 is attached freely to open and close the front suction port 6 via the link mechanism 16. Moreover, the drive motor 20 and the deceleration mechanism (gear unit) 22 for opening / closing and driving the movable panel 18 via the link mechanism 16 on the front surface side near the one end part of the frame 4. ) Is attached.

2 shows a state in which the wind direction changing blade 12 and the movable panel 18 close the ejection opening 8 and the front inlet 6, respectively, and FIG. 3 shows the wind direction changing blade 12 and the movable panel 18. Indicates a state in which the blowout opening 8 and the front suction port 6 are opened, respectively.

As shown to FIG. 4 and FIG. 5, in the part except the both ends of the front panel 14, the some spherical opening part 14a is formed in grid | lattice form, and is arrange | positioned at the upper part The drive shaft 24 has a substantially D-shaped cross-sectional shape, and is formed integrally with the upper inner surface of the front panel 14 and separated from each other at predetermined intervals (for example, two drive shaft supporting members). The rotational motion is freely supported by 26. In addition, a plurality of (for example, three) spherical openings 14b are formed in the center portion and both ends of the front panel 14 from the center portion in the longitudinal direction to the upper portion thereof, and the spherical opening portion 14b is provided. Functions as a link receiving hole.

In addition, the plurality of link mechanisms 16 described above are constituted by a long link 16a and a short link 16b in which the intermediate portions are freely connected to each other in a rotational motion. On the opposing drive shaft 24, the upper end of the long link 16a constituting each link mechanism 16 is held. That is, a substantially D-shape drive shaft insertion through hole is formed in the upper end of the long link 16a, and the drive shaft 24 is inserted through the drive shaft insertion through hole, thereby driving the drive shaft 24. The long link 16a swings with rotation.

6 and 7, the lower end of the long link 16a is formed in a two-pronged shape, and a pair of pins (not shown) protruding toward the inside on the inner surface of the two-pronged lower end. This is formed integrally. 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 is provided in a circular hole (not shown) provided in the long link attachment portion 28. By this insertion, the lower end of the long link 16a is freely attached to the long link attaching portion 28 by a rotational motion.

On the other hand, the upper end 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 protruding toward the inside are formed on the inner surface of the bifurcated upper end. (Not shown) is formed integrally, and the pin 30 which protrudes toward the side is integrally formed in the lower end part of the short link 16b. In addition, the short link attachment part 32 is integrally formed in the site | part separated from the long link attachment part 28 in the inner surface of the movable panel 18 upwards by predetermined length, This short link attachment part Since the pin of the upper end of the short link link 16b is inserted into the long arc-shaped hole 32a of the drilled hole 32, the upper end of the short link link 16b is freely slid to the short link attaching portion 32 and rotates. The movement is attached freely. Further, ribs 34 are formed around the spherical opening 14b, which is a link receiving hole, to protrude rearward, and the lower end portion of the short link 16b is formed in an elongated hole 34a provided in a portion of the ribs 34. As shown in FIG. By the pin 30 being leisurely inserted, the lower end of the short link 16b is freely slid and the rotational movement is freely attached to the rib 34.

Further, at one end (left side from the front, right side in Fig. 4) of the drive shaft 24, as shown in Fig. 8, a sector gear (shaft gear) 36 having a gear portion formed only in a predetermined angle range, It is attached adjacent to the upper end of the elongate link 16a as a drive gear for rotationally driving the drive shaft 24. That is, the sector gear 36 has the boss part 38 provided with the substantially D-shaped drive shaft insertion hole 38a, and the drive shaft 24 is inserted in this drive shaft insertion hole 38a. By passing, the driving force of the drive motor 20 is transmitted to the drive shaft 24 through the speed reduction mechanism 22 and the sector gear 36.

The sector gear 36 includes a base 40 extending in a direction orthogonal to the boss portion 38, a base portion 42 extending in parallel to the arm portion 40, and a tip portion of the arm portion 40. The gear part 44 formed on the part 42 is provided, and these are integrally shape | molded with resin. The gear part 44 has an arc shape centering on the rotation center (center of the boss part 38) of the sector gear 36, and provided in plurality on the base part 42 at predetermined intervals (for example, 5). A plurality of pins 44a, and these plurality of pins 44a are connected to each other by an arc-shaped rib 46 at the distal end of the arm portion 40. That is, since the gear part 44 is comprised by the some pin 44a instead of an involute gear like the conventional one, the tooth tip end surface of the gear part 44 has shown the semicircle shape.

As shown in FIG. 4, at each end of the front panel 14, two attachment members 48 separated in the vertical direction are integrally formed, and as shown in FIG. 1, the frame 4 The attachment part insertion hole 4a (only the upper insertion hole is shown in FIG. 1) is provided in the corresponding site | part, and the attachment member 48 of the front panel 14 is attached to the attachment member of the frame body 4). The front panel 14 is attached to the frame 4 together with the movable panel 18 by inserting it into the insertion hole 4a.

9 to 13 show a drive motor 20 and a deceleration mechanism 22 attached to the heat exchanger 10, and FIGS. 9 and 10 show that the sector gear 36 is part of the deceleration mechanism 22. 11 is a state in which the sector gear 36 is removed from the state of FIG. 9, FIG. 12 is a state in which a part of the casing is notched in the state of FIG. 11, and FIG. 13 is a state of the sector gear 36. The state at the time of engagement with a part of deceleration mechanism 22 is shown, respectively.

9 to 13, the reduction mechanism 22 includes a casing 50 divided into two, a first gear 52 accommodated in the casing 50, and a second and third gear unit 54. 56). The casing 50 consists of the 1st casing half 50a fixed to the heat exchanger 10, and the 2nd casing half 50b which can be attached or detached with respect to the 1st casing half 50a, and the 1st casing half 50a is attached toward the center of the heat exchanger 10, while the second casing half 50b is attached to the end side of the heat exchanger 10.

In addition, on the inner surface of the first casing half 50a, a second gear support member 58 adjacent to the drive shaft 20a of the drive motor 20 and a third gear adjacent to the second gear support member 58 are provided. The gear support member 60 is integrally formed. As shown in FIG. 13, the surface 50c of the 1st casing half 50a which the 2nd gear support member 58 and the 3rd gear support member 60 protruded and provided is formed in the heat exchanger 10. As shown in FIG. It consists of the flat surface extended in the direction orthogonal to the attachment surface 50d of the 1st casing half 50a with respect to, and the drive motor 20 is being fixed to the outer surface of this flat surface 50c.

On the other hand, the second casing half 50b has a first flat surface 50e extending in parallel with the flat surface 50c of the first casing half 50a, and the inner surface thereof drives the drive motor 20. The first gear support member 62 arranged concentrically with the shaft 20a, and the second gear support member arranged concentrically with the second gear support member 58 of the first casing half 50a. 64 is integrally formed. In addition, the third gear support member 60 of the first casing half 50a is formed on the second flat surface 50g extending in parallel with the first flat surface 50e by sandwiching the opening 50f described later. The third gear supporting member 66 arranged concentrically is formed integrally.

In addition, 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 second 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 the first gear supporting member formed on the second casing half 50b. The rotational motion is freely supported by 62. On the other hand, the second and third gear units 54 and 56 are the second gear supporting members 58 and 64 and the third gear supporting members 60 and 66 formed in the first and second casing halves 50a and 50b. Are rotated freely by each.

In addition, the first gear 52 attached to the drive shaft 20a of the drive motor 20 meshes with the large-diameter gear 54a of the second gear unit 54 to form the small gear of the second gear unit 54. The diameter gear 54b meshes with the large diameter gear 56a of the third gear unit 56, and the small diameter gear 56b of the third gear unit 56 meshes with the sector gear 36. For this reason, the tooth bottom face of the small diameter gear 56b of the 3rd gear unit 56 has a complementary shape with the tooth front end surface of the gear part 44 of the sector gear 36, and has a small diameter gear ( The tooth bottom of 56b) has shown the semicircle shape. In addition, the tooth tip end surface of the small diameter gear 56b has a predetermined angle (in order to avoid interference with the gear portion 44 at the time of engagement with the sector gear 36 (when the front panel 14 is attached). For example, it is formed as a convex surface constituting 90 degrees, and there is no tooth tip end surface which is different from the involute gear. In addition, the large diameter and small diameter gears 54a and 54b of the first gear 52, the second gear unit 54, and the large diameter gear 56a of the third gear unit 56 are formed as involute gears. have.

In addition, since the small diameter gear 56b of the third gear unit 56 meshes with the sector gear 36, the casing 50 (corresponding to the engagement portion between the small diameter gear 56b and the sector gear 36) ( An opening 50f is formed in the second casing half 50b. In addition, 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 deceleration mechanism 22 is directly exposed to the air sucked through the opening 14a of the front panel 14, the dust contained in the intake air is passed through the opening 50f of the casing 50. There is a possibility of breaking into the inside. If dust enters the deceleration mechanism 22, the operation of the deceleration mechanism 22 may be adversely affected. Therefore, the large diameter gear 56a and the small diameter gear 56b constituting the third gear unit 56 may be adversely affected. A circular dust intrusion prevention flange (parting part) 56c is integrally formed between them. This dust intrusion prevention flange 56c is formed so that the surface may substantially correspond with the 1st flat surface 50e of the 2nd casing half 50b mentioned above, and the opening part on this surface is complementary to the dust intrusion prevention flange 56c. The other deceleration mechanism 22 which is circular in shape and excludes the small-diameter gear 56b of the third gear unit 56 is the dust intrusion preventing flange 56c of the casing 50 and the third gear unit 56. By being accommodated in the substantially sealed space by invasion, the invasion of the dust in this space is prevented.

Moreover, the 1st casing half 50a is equipped with the two attachment parts 68 and 70 for attaching to the heat exchanger 10, The one attachment part 68 is the edge part of the heat exchanger 10. It is inserted between a plurality of fins (not shown) constituting the heat exchanger 10 in the vicinity, so that the tip end thereof is caught by a part of a plurality of copper pipes passing through the fin. On the other hand, the other attachment portion 70 is mounted on one side of two end plates disposed at both ends of the plurality of pins with screws.

As the drive motor 20, for example, a stepping motor is used. However, in order to set the swing angle of the sector gear 36 that swings under the driving force of the drive motor 20, the drive motor 20 is used. It is necessary to set the rotation angle of. Therefore, a part of the above-mentioned first flat surface 50e of the second casing half 50b is integrally formed with a stopper 72 which abuts against an end of the gear portion 44 of the sector gear 36. At the time of closing stop of the movable panel 18, the position which the sector gear 36 contacted with the stopper 72 is set as the origin of positioning.

Further, the gear portion 44 of the sector gear 36 is formed only in a predetermined angle range with respect to the swing center, and the movable panel 18 swings from the open position to the closed stop position to contact the frame 4. Surface (see FIG. 10), the tooth tip end surface of the tooth positioned 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 56b of the third gear unit 56 have. At this time, since the drive motor 20 is intended to rotate further for a short time, the small diameter gear 56b of the third gear unit 56 further rotates in the counterclockwise direction in FIG. 10, so that the stopper 72 is rotated. If not, there exists a possibility that the tooth shift | offset | difference phenomenon which cancels the engagement state of the sector gear 36 and the small diameter gear 56b may arise. Therefore, the stopper 72 not only sets the origin for positioning the sector gear 36, but also acts as a tooth departure preventing means.

In addition, 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 gear which abuts against the small diameter gear 56b when the movable panel 18 is closed and stopped. The position of the stopper 72 is set so that the stopper 72 abuts against the tooth side surface at the opposite end of the tooth positioned at the end of the section 44.

In addition, the sector gear 36 is attached to one end of the relatively long drive shaft 24, and the drive shaft insertion passage of the long link 16a constituting the drive shaft 24 and the respective link mechanisms 16 passes. Since there is a small amount of clearance in the hole, the end located on the sector gear 36 side and the end on the opposite side are not only opened and closed at the same time. In the closing stop of the movable panel 18, compared with the end of the movable panel 18 located on the sector gear 36 side, the end of the movable panel 18 has a slight closing stop delay and is located on the sector gear 36 side. If the position of the stopper 72 is set so that the sector gear 36 abuts against the stopper 72 when the end of the movable panel 18 is in contact with the frame 4, the opposite side of the movable panel 18 The end part may not be in contact with the frame 4, which is bad to see. Therefore, after the end of the movable panel 18 located on the sector gear 36 side is in contact with the frame 4, the position of the stopper 72 further rotates the drive motor 20 to move the movable panel 18. The position is determined so that the sector gear 36 abuts on the stopper 72 at the point where the end of the opposite side abuts on the frame 4.

The effect | action of the indoor unit 2 of the air conditioner which concerns on this invention of the said structure is demonstrated below.

As shown in FIG. 2, when the air conditioner is stopped, the movable panel 18 is in close contact with the front panel 14, and the opening 14a of the front panel 14 is closed by the movable panel 18. It is. At this time, the sector gear 36 is in contact with the stopper 72 formed in the second casing half 50b, and the long link 16a and the short link 16b constituting each link mechanism 16 are approximately. It is arranged in a vertically straight state and is accommodated in the link receiving hole (spherical opening) 14b 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 operate, and in the indoor unit 2, the blower 11 operates and the wind direction changing blade ( 12) is open controlled (see FIG. 3). At the same time, the drive motor 20 rotates by a predetermined number and the sector gear 36 swings at a predetermined angle from the state of FIG. 2 to the state of FIG. 3 via the deceleration mechanism 22. As a result, since the drive shaft 24 rotates at a predetermined angle with the swing of the sector gear 36, the movable panel I8 is opened through the link mechanism 16. At this time, the long link 16a constituting each link mechanism 16 swings around the center of the drive shaft 24, and both ends of the short link 16b are attached to the short link. It slides along the arc-shaped long hole 32a of 32 and the long hole 34a of the rib 34. As shown in FIG. As a result, although the movable panel 18 moves substantially parallel toward the front, in view of the shape at the time of opening the movable panel 18, as shown in FIG. 3, the opening space | interval of the upper end part of the movable panel 18 is rearward of the lower end part. The length of the long link 16a and the short link 16b is set so that it may become larger than the opening gap of.

Subsequently, when the operation switch is turned OFF by the remote controller, the operation of the outdoor unit and the indoor unit 2 is stopped, and in the indoor unit 2, the blower 11 stops and the wind direction changing blade 12 is stopped. Closed control (see FIG. 2). At the same time, the drive motor 20 rotates by a predetermined number, and the sector gear 36 swings at a predetermined angle from the state of FIG. 3 to the state of FIG. 2 through the deceleration mechanism 22, and the sector gear 36 After the end of the abutment touches the stopper 72 of the second casing half 50b, the drive motor 20 stops. As a result, since the drive shaft 24 rotates at a predetermined angle with the swing of the sector gear 36, the movable panel 18 is moved substantially parallel to the rear through the link mechanism 16, and the frame 4 ) Closes and stops.

The air conditioner according to the present invention includes a movable panel which can be opened and closed freely, and a means for preventing intrusion of dust into the reduction mechanism provided between the driving source and the movable panel is prevented. It can be used as a general household air conditioner.

BRIEF DESCRIPTION OF THE DRAWINGS The exploded perspective view of the indoor unit which comprises the air conditioner which concerns on this invention.

FIG. 2 is a longitudinal sectional view of the indoor unit of FIG. 1 with the movable panel closed; FIG.

3 is a longitudinal sectional view of the indoor unit of FIG. 1 with the movable panel open;

4 is a perspective view when the front panel and the movable panel are viewed from the inside;

Fig. 5 is a partially enlarged perspective view of the front panel and the movable panel of Fig. 4.

6 is a perspective view when the movable panel is viewed from the inside.

FIG. 7 is a partially enlarged perspective view of the movable panel of FIG. 6. FIG.

8 shows the sector gear and the deceleration mechanism engaged with each other for opening and closing the movable panel.

A perspective view of some.

9 is a perspective view of the sector gear and the deceleration mechanism engaged with each other.

10 is a partial cross-sectional view of the sector gear and the reduction mechanism of FIG. 9.

11 is a perspective view of a reduction mechanism.

FIG. 12 is a perspective view of the reduction mechanism of FIG. 11, in which part of the casing is notched; FIG.

Drawing showing state.

13 is a cross-sectional view of the reduction mechanism of FIG. 11.

* Explanation of symbols for main parts of the drawings

2: indoor unit 4: frame

4a: attachment member insertion hole 6: inlet

8: Outlet 9: Air passage

10: heat exchanger 11: blower

12: wind direction changing blade 14: front panel

14a: opening 14b: opening (link receiving 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 attachment portion

30: pin 32: short link attachment portion

32a: long hole 34: rib

34a: long hole 36: sector gear

38: boss portion 38a: drive shaft insertion through hole

40: arm portion 42: base portion

44: gear portion 44a: pin

46: rib 48: attachment member

50: casing 50a: first casing half

50b: second casing half 50c: flat surface

50d: mounting surface 50e: first flat surface

50f: opening portion 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: attachment portion

72: stopper

Claims (5)

1. An air conditioner having an outdoor unit and an indoor unit connected to each other via a refrigerant pipe,

   The indoor unit has a frame body and a heat exchanger and a blower housed in the frame body, and a front panel is detachably attached to the frame body, and the front suction port formed in the frame body. A movable panel for opening and closing the door is attached to the front panel via a link mechanism, and the opening and closing mechanism of the movable panel includes a drive motor, a speed reduction mechanism connected to the drive motor, and a drive gear engaged with the speed reduction mechanism. And a drive shaft connected to the drive gear, and the link mechanism connected to the drive shaft, accommodating the deceleration mechanism in a casing having an opening, and exposing a portion of the deceleration mechanism from the opening. A partition portion for engaging the drive gear and preventing the ingress of dust in the portion of the reduction mechanism. Air conditioner according to claim.
2. The small diameter gear of the two-stage gear of Claim 1 in which the opening part of the said casing shows circular shape, and the said part of the said reduction mechanism has a large diameter gear and a small diameter gear. And the partition portion is a circular dust intrusion prevention flange integrally formed between the large diameter gear and the small diameter gear.
3. 3. The air conditioner according to claim 2, wherein the casing has two flat surfaces extending in parallel, and the dust penetration preventing flange is formed so as to substantially coincide with one of the two flat surfaces. .
4. The said large diameter gear is formed as an involute gear, The tooth bottom face of the said small diameter gear and the tooth front end surface of the said drive gear were formed in semicircle shape. Air conditioner, characterized in that.
5. The air conditioner according to any one of claims 1 to 4, wherein the deceleration mechanism is attached near an end of the heat exchanger.