JP5949752B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner that changes a wind direction of a wind direction polarizing plate at a blowout port by a drive motor.

  In recent years, many air conditioning indoor units change and control a wind direction attitude of a wind direction change plate for making the wind direction of blown air variable. In such an air conditioner, for example, as described in Patent Document 1 and Patent Document 2, a drive motor composed of a stepping motor is in an atmosphere in which uncooled air drifts outside the air outlet in the apparatus. Had been placed. And a drive motor and the wind direction formation board were connected through the through-hole formed in the air-path formation wall which comprises a blower outlet.

  In such an air conditioner, in the case of cooling operation, cold air flows from the gap formed in the through hole to the drive motor side, the drive motor is cooled by this cold air, and moisture contained in the ambient air is condensed was there. When the drive motor is condensed, the condensed water will drip. Therefore, in order to avoid this dew condensation, a method of covering the motor body with a heat insulating material has been generally used.

JP 2001-124402 A JP 2010-266119 A

  However, the method of covering the drive motor with the heat insulating material not only increases the number of parts, but also requires an operator who covers the drive motor with the heat insulating material, and increases the work man-hours. It was a factor of cost increase.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the air conditioner which reduced the countermeasure cost for suppressing the dew condensation of a drive motor.

An air conditioner that solves this problem includes a blowout port that blows out heat-exchanged air, a wind direction change plate for changing the wind direction of the blown air disposed in the blowout port, and a wind direction posture of the wind direction change plate The wind direction changing plate has a boss portion that fits a drive shaft on a side portion of the drive motor, and the boss portion extends from a side end portion of the wind direction changing plate. It has a columnar protrusion that protrudes in the direction of the air passage forming wall that constitutes the air outlet, and a drive shaft fitting hole that fits the drive shaft formed in the columnar protrusion, and the air passage forming wall is And a through portion that penetrates the coupling portion between the boss portion and the drive shaft, and the through portion surrounds the outer peripheral side surface of the columnar protrusion from the flat portion of the air passage forming wall to the drive motor side. A cylindrical protruding portion formed to protrude to the outer peripheral surface of the columnar protruding portion and the An inner collar portion formed at the tip of the cylindrical projection portion that covers the drive motor side of a cylindrical gap formed between the inner circumferential surface of the cylindrical projection portion, , have a through hole through which the bearing portion of the drive shaft projecting from said drive motor, said drive motor, the bearing portion is fixed to the air path formation wall so as to be located in the through hole, the through The clearance between the inner peripheral surface of the hole and the outer peripheral surface of the bearing portion is configured to be smaller than the cylindrical clearance .

  According to such a configuration, a cylindrical gap is formed between the outer peripheral surface of the columnar protruding portion of the boss portion and the inner peripheral surface of the cylindrical protruding portion in the through portion of the air passage forming wall. The gap is covered with an inner flange formed at the tip of the cylindrical protrusion. Therefore, in order to connect the wind direction changing plate and the drive motor on the outlet side, a through-hole is provided in the air passage forming wall. Leakage is shielded and mitigated by this inner collar.

Further , according to such a configuration, since the drive motor is fixed to the side surface of the air passage forming wall, the tolerance between the axial center position of the drive motor and the axial center position of the penetrating portion formed in the air passage forming wall. Can be reduced. Thereby, the clearance gap between the inner peripheral surface of a through-hole and the outer peripheral surface of the said drive shaft can be made small. Therefore, the flow of the cold air to the drive motor in the through-hole portion of the air passage forming wall of the blower outlet increases the resistance against the cold air leakage in the through-hole of the inner flange portion in addition to the shielding effect by the surface portion of the inner flange portion. Therefore, the leakage of cold air can be further reduced.

  The drive motor is fixed to the side surface of the air passage forming wall, and the side surface on the drive shaft side of the drive motor is attached to the surface portion of the inner flange portion leaving a clearance of about manufacturing tolerance. Preferably it is.

  According to such a configuration, since the drive motor is fixed to the side surface of the air passage forming wall, the distance tolerance between the side surface on the drive shaft side of the drive motor and the flat portion of the inner flange portion can be reduced. Accordingly, the side surface of the drive motor on the side of the drive shaft can be attached to the surface portion of the inner flange part or leaving a clearance of about manufacturing tolerance, thereby further reducing the leakage of cold air to the drive motor side. Can do.

  The drive shaft fitting hole formed in the cylindrical projecting portion of the boss portion and the drive shaft of the drive motor are configured to be fitted at least at a portion formed in a non-circular cross section. Is preferred.

According to such a configuration, the drive motor and the wind direction change plate are prevented from rotating only by inserting the drive shaft of the drive motor into the drive shaft fitting hole formed in the cylindrical protrusion of the boss portion. Can be connected. Therefore, the connection structure between the drive motor and the wind direction changing plate can be simplified, and the connection operation can be simplified.

According to the invention, the leakage of cold air from the air outlet to the drive motor in the through-hole portion of the air path forming wall which is required for connecting the drive motor of the wind direction changing plate and air outlet outside the inner flange portion In addition to the shielding effect, the resistance to cold air leakage in the through-hole is increased, so that it is further alleviated.

It is sectional drawing of the indoor unit in the air conditioner which concerns on embodiment of this invention. It is the perspective view which looked at the right side of the blower outlet in the same air conditioner from the front lower part. It is sectional drawing of the connection part with the drive motor which drives the horizontal blade | wing concerning the same blower outlet, and the horizontal blade | wing. It is the side view seen from the drive motor side of the horizontal blade. It is a perspective view of the drive motor which drives the horizontal blade | wing. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG.

  A specific example of an air conditioner according to an embodiment of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to the claim are included.

[Overall configuration of this air conditioner]
As shown in the side sectional view of FIG. 1, the air conditioner according to the present embodiment is a wall-hanging indoor unit, and a cross-flow fan 2 and an indoor heat exchanger 3 are housed inside an indoor casing 1. Has been.

  The indoor casing 1 includes a bottom frame 4 in which a wall surface extending from the rear surface to the front lower outlet and a side wall formed on the side of the wall surface are integrated, and a front panel 5 that functions as an exterior case when viewed from the front surface side. Consists of. The bottom frame 4 and the front panel 5 are resin molded products.

  The bottom frame 4 includes a back wall above the back surface, a fan casing 4a of a cross flow fan that also functions as a back wall at the lower portion of the back surface, and an air channel side wall (un- A drain pan 4b attached to the lower side of the indoor heat exchanger 3, an air passage forming wall 10 that forms an air outlet 6 connected to the fan casing 4a, and the like are integrally formed.

  The air outlet 6 communicates with the cross flow fan 2 disposed in the center of the indoor casing 1 and is formed in a shape for blowing air from the lower side of the indoor casing 1 toward the front. Further, the blower outlet 6 has a horizontal blade 7 as a wind direction changing plate for adjusting the vertical air direction of the blown air by driving a drive motor, and a vertical blade 8 for manually adjusting the horizontal air direction of the blown air. It has. A drive motor 9 (see FIG. 3) that changes the wind direction posture of the horizontal blades 7 as a wind direction changing plate is located inside the indoor casing 1 that is located outside the air passage forming wall 10 (see FIGS. 2 and 3) of the air outlet 6. And is connected to the horizontal blade 7 via a drive motor 9.

  The front panel 5 is attached to the front side of the bottom frame 4 and includes a front surface, a top surface, and side surfaces as an exterior case. And the front panel 5 is provided with the suction inlet 12 on the upper surface. An air filter 13 is attached to the front surface of the indoor heat exchanger 3 inside the front panel 5. The front panel 5 is provided with a service lid 11 that enables maintenance of the air filter 13 on the front surface. The service lid 11 has a structure in which the front surface is opened in a rotating manner with the upper part as a fulcrum, and is formed so that the air filter 13 can be serviced easily.

  The cross-flow fan 2 is arranged at a substantially central portion of the indoor casing 1 so that the rotation axis is in the horizontal direction, and is formed so as to suck air from the front and the upper side and blow out from the lower direction toward the front outlet 6. ing.

  The indoor heat exchanger 3 is formed of a first divided heat exchanger 3a bent in three stages in front of the cross flow fan 2 and a second divided heat exchanger 3b located in the upper rear part of the cross flow fan 2. Has been. Further, the first divided heat exchanger 3 a and the second divided heat exchanger 3 b are connected so that the end surfaces thereof are V-shaped at the upper part of the cross flow fan 2. It is difficult to prevent a gap from being formed in the V-shaped connecting portion 16 in such a combined structure. Therefore, a seal member 17 is attached to the connecting portion 16. The seal member 17 suppresses bypassing the indoor heat exchanger without cooling the indoor air. The indoor heat exchanger 3 configured as described above is attached so as to be supported by the air channel side wall, the back wall, the drain pan portion, and the like of the bottom frame 4.

[Structure of connecting part of wind direction change plate and drive motor]
Next, the structure details of the connection part to which the drive motor 9 which drives the horizontal blade | wing 7 in the blower outlet 6, and a wind direction change board, and the horizontal blade | wing 7 in this case are connected via the air-path formation wall 10 are demonstrated.

  As shown in FIG. 1, the horizontal blade 7 forms the same outer surface as the outer surface of the bottom frame 4 in the fully closed state indicated by a two-dot chain line. As shown in FIGS. 2 and 3, the horizontal blade 7 is driven by a drive motor 9 connected to the right boss 20 as viewed from the front, with the boss 20 raised at the left and right ends as the center. The front end is pivotally supported so as to rotate downward.

Next, the detailed structure of the connection part of the horizontal blade | wing 7 and the drive motor 9 is demonstrated.
As shown in FIGS. 3 and 4, the horizontal blade 7 has a support wall 21 that supports the boss portion 20 at the right end thereof raised in a substantially vertical direction with respect to the horizontal blade 7. The boss portion 20 is formed to fit the drive shaft 92 of the drive motor 9 at a position away from the horizontal blade 7 by a predetermined dimension.

As shown in FIGS. 2 and 4, the air passage forming wall 10 that forms the right side wall of the air outlet 6 is provided at a small interval from the support wall 21 that supports the boss portion 20.
As shown in FIG. 3, the drive motor 9 for changing and controlling the wind direction posture of the horizontal blade 7 as the wind direction changing plate is a stepping motor, and is located on the right side of the air outlet 6 when viewed from the front side of the air path forming wall 10. Installed in an atmosphere with uncooled air.

  As shown in FIG. 3, the boss 20 projects a columnar projection 22 from one surface of the support wall 21, in this case from the right side as viewed from the front, toward the air passage forming wall 10 constituting the air outlet 6. The columnar protrusion 22 is formed with a drive shaft fitting hole 23 for fitting the drive shaft 92 of the drive motor 9 in the shaft center portion.

  As shown in FIG. 5, in the drive motor 9, a bearing portion 91 that pivotally supports the drive shaft 92 protrudes from the side surface of the drive motor main body on the horizontal blade 7 side. And the drive shaft 92 is protruded from this bearing part 91 to the horizontal blade | wing 7 side. The drive shaft 92 is a large-diameter shaft portion 92a having an oval cross section on the bearing side, and a small-diameter shaft portion 92b having a circular cross section at the tip.

  As shown in FIG. 3, the drive shaft fitting hole 23 formed in the columnar protruding portion 22 of the boss portion 20 is a large diameter fitting hole 23 a that fits into the large diameter shaft portion 92 a of the drive shaft 92 of the drive motor 9. Is formed on the distal end side of the columnar protrusion 22, and a small diameter fitting hole 23 b that fits into the small diameter shaft portion 92 b of the drive motor 9 is formed on the back side of the large diameter fitting hole 23 a.

  As shown in FIGS. 3 and 6, the large-diameter shaft portion 92a of the drive motor 9 that is fitted into the large-diameter fitting hole 23a of the columnar protrusion 22 in the boss portion 20 has an oval cross section. The diameter fitting hole 23a is also a hole having an oblong cross section, and the large diameter shaft portion 92a is fitted into the large diameter fitting hole 23a.

  As shown in FIGS. 3 and 7, the small-diameter shaft portion 92b of the drive motor 9 fitted into the small-diameter fitting hole 23b of the columnar protrusion 22 in the boss portion has a circular cross section, and the small-diameter fitting hole 23b corresponding thereto. Is also a hole having a circular cross section, and the small diameter shaft portion 92b is fitted in the small diameter fitting hole 23b.

As shown in FIG. 5, the drive motor 9 has a pair of mounting legs 94 protruding. A mounting hole 95 is formed in the mounting leg 94.
The drive motor 9 is attached to the air passage forming wall 10 as follows.

  As shown in FIG. 3, one mounting leg 94 (upper leg in FIG. 3) is brought into contact with a mounting leg support portion 51 protruding from the air passage forming wall 10 and the surface regulating wall 52 of the mounting leg 94. And the side regulating wall 53 and the like. The other mounting leg 94 abuts on the mounting screw seat 54 protruding from the air passage forming wall 10 and is fixed to the air passage forming wall 10 by being screwed to the mounting screw seat 54 through the mounting hole 95. Has been. In this way, the drive motor 9 is accurately attached to the air passage forming wall 10 with one screw.

The air passage forming wall 10 is formed with a through portion 30 that penetrates the coupling portion between the boss portion 20 and the drive shaft 92.
The penetrating portion 30 has a cylindrical protruding portion 31 formed to protrude from the flat portion of the air passage forming wall 10 toward the drive motor 9 so as to surround the outer peripheral side surface of the columnar protruding portion 22 of the boss portion 20. . In addition, a gap is formed in a cylindrical shape between the outer peripheral surface of the columnar protrusion 22 and the inner peripheral surface of the cylindrical protrusion 31 so that the horizontal blade 7 can be rotated. In this specification, this gap is referred to as a cylindrical gap S1. Further, the tip end of the cylindrical protrusion 31 is formed in the inner flange 32 so as to block the passage of cool air leaking from the end surface of the cylindrical gap S1 on the drive motor 9 side.

  That is, a through hole 33 is formed at the center of the inner flange 32 so as to penetrate the bearing 91 that protrudes from the side 96 on the drive shaft side of the drive motor 9. The clearance S2 with the outer peripheral surface of the bearing portion 91 is configured to be smaller than the cylindrical clearance S1 formed between the inner peripheral surface of the cylindrical protrusion 31 and the outer peripheral surface of the columnar protrusion 22. Further, the side surface 96 on the drive shaft side of the drive motor 9 is attached in contact with the surface portion of the inner flange portion 32 or leaving a gap of a manufacturing tolerance.

[Action]
Next, the operation of the cooling operation of the air conditioner will be described as an operation of the air conditioner configured as described above.

  When the air conditioner is cooled, the cross flow fan 2 is operated. Further, along with the operation of the outdoor unit (not shown), the indoor heat exchanger 3 acts as an evaporator. On the other hand, the room air is sucked from the air inlet 12 formed in the front panel 5 as indicated by the white arrow F. Then, the indoor air sucked into the machine is cooled by the indoor heat exchanger 3 acting as an evaporator, and is blown out forward as indicated by the white arrow G from the blowout port 6 as cold air. At this time, the horizontal blade 7 is moved to an angle set according to a user's operation instruction by a stepping motor as the drive motor 9.

  In the cooling operation having such an action, in the connecting portion between the horizontal blade 7 and the drive motor 9, a part of the cool air passing through the outlet 6 is formed in a cylindrical shape with the outer peripheral surface of the columnar protruding portion 22 of the boss portion 20. An attempt is made to leak into the storage space of the drive motor 9 from the cylindrical gap S <b> 1 formed between the inner peripheral surface of the protrusion 31. However, an inner flange 32 is formed at the tip of the cylindrical protrusion 31 so as to shield the cold air leaking from the end surface on the drive motor side of the cylindrical gap S1. That is, the clearance S2 between the inner peripheral surface of the through hole 33 of the inner flange portion 32 and the outer peripheral surface of the bearing portion 91 of the drive motor 9 inserted into the through hole 33 is formed to be smaller than S1. . Therefore, the cylindrical gap S1 formed between the outer peripheral surface of the columnar protrusion 22 and the inner peripheral surface of the cylindrical protrusion 31 is a gap S2 between the inner peripheral surface of the through hole 33 and the outer peripheral surface of the bearing portion 91. Is a dead end because of small.

  Further, the side surface 96 of the drive motor 9 is attached to the surface portion of the inner collar portion 32 or is left with a gap of a manufacturing tolerance. For this reason, the cylindrical gap S1 formed between the outer peripheral surface of the columnar protrusion 22 and the inner peripheral surface of the cylindrical protrusion 31 becomes a more severe dead end state even by this configuration. Thus, since the structure which interrupts | blocks a cold air leak channel | path is comprised in two steps, the flow from the cylindrical clearance S1 to the installation space of the drive motor 9 is almost interrupted. Thereby, cooling of the drive motor 9 is eased.

[Effect of the embodiment]
Since the air conditioner according to the present embodiment is configured as described above, the following effects can be achieved.

  (1) In the penetrating portion 30 of the air passage forming wall 10, a cylindrical gap S <b> 1 formed between the outer peripheral surface of the columnar protruding portion 22 of the boss portion 20 and the inner peripheral surface of the cylindrical protruding portion 31 is cylindrically projected. Covered by an inner flange 32 formed at the tip of the portion 31. Therefore, the leakage of cold air from the blower outlet 6 to the drive motor 9 in the through portion 30 of the air passage forming wall 10 is shielded and mitigated by the inner flange portion 32.

  (2) Since the drive motor 9 is fixed to the side surface of the air passage forming wall 10, the tolerance between the axial center position of the drive motor 9 and the axial center position of the through portion 30 formed in the air passage forming wall 10 is reduced. Thus, the gap S2 between the inner peripheral surface of the through hole 33 and the outer peripheral surface of the drive shaft 92 can be reduced. Therefore, the flow of the cold air to the drive motor 9 in the through portion 30 of the air passage forming wall 10 increases the resistance against the cold air leakage in the through hole 33 of the inner flange portion 32 in addition to the shielding effect by the surface portion of the inner flange portion 32. Therefore, the leakage of cold air can be further reduced.

  (3) Since the drive motor 9 is fixed to the side surface of the air passage forming wall 10, the distance tolerance between the side surface 96 on the drive shaft side of the drive motor 9 and the flat portion of the inner flange portion 32 can be reduced. Therefore, the side surface 96 on the drive shaft side of the drive motor 9 can be attached to the surface portion of the inner collar portion 32 with a clearance or a manufacturing tolerance level gap left, thereby preventing the cool air from leaking to the drive motor 9 side. It can be further reduced.

  (4) Since the drive shaft fitting hole 23 formed in the columnar protruding portion 22 of the boss portion 20 and the drive shaft 92 of the drive motor 9 are fitted at an oval section, the drive shaft of the drive motor 9 Only by inserting 92 into the drive shaft fitting hole 23, the drive motor 9 and the horizontal blade | wing 7 as a wind direction change board can be connected, preventing rotation. Therefore, the connection structure between the drive motor 9 and the wind direction changing plate can be simplified, and the connection operation can be simplified.

[Modification]
The above embodiment can be modified as follows.
In the above embodiment, the horizontal blade 7 is targeted as the wind direction changing plate, but the same structure is used when the vertical blade 8 is driven in the left-right direction by the drive motor 9 installed outside the air passage forming wall 10. By applying, it is possible to prevent condensation on the drive motor 9.

-Only the horizontal blade | wing 7 is provided in the blower outlet 6, and it applies similarly about what drives this horizontal blade | wing 7 with the drive motor 9. FIG.
-Although the wall-mounted indoor unit was illustrated as an example of an air conditioner, it is not limited to such an air conditioner. The present invention can be similarly applied to other types of air conditioners as long as the cooling operation is performed.

  In the above-described embodiment, the side surface 96 on the drive shaft side of the drive motor 9 is attached to the surface portion of the inner collar portion 32 while leaving a gap of about a manufacturing tolerance, but is not limited thereto. It is not something. Although the cool air leakage suppressing effect is reduced as compared with the above embodiment, the cold air leakage suppressing effect is exhibited even when the side surface 96 on the drive shaft side of the drive motor 9 is separated from the surface portion of the inner flange portion 32. be able to.

  In the air conditioner according to the above embodiment, the air passage forming wall 10 of the air outlet 6 is formed integrally with the bottom frame 4, but it is not such and is separate from the bottom frame 4. It may be formed.

F White arrow G White arrow S1 Cylindrical gap S2 Gap 1 Indoor casing 2 Cross flow fan 3 Indoor heat exchanger 4 Bottom frame 4a Fan casing 4b Drain pan 5 Front panel 6 Air outlet 7 Horizontal blade (as wind direction change plate) 8 Vertical blade 9 Drive motor 10 Air passage forming wall 11 (of the air outlet) Service lid 12 Suction port 13 Air filter 16 Connecting portion 17 Sealing member 20 Boss portion 21 Support wall 22 Columnar protrusion 23 Drive shaft fitting hole 23a Large diameter Fitting hole 23b Small-diameter fitting hole 30 Through part 31 Cylindrical protrusion 32 Inner flange part 33 Through hole 51 Mounting leg support part 52 Surface regulation part 53 Side regulation wall 54 Mounting screw seat part 91 Bearing part 92 Drive shaft 92a Large diameter Shaft portion 92b Small diameter shaft portion 94 Mounting leg 95 Mounting hole 96 Side surface

Claims (3)

An air outlet (6) for blowing out heat-exchanged air;
A wind direction changing plate for making the wind direction of the blown air arranged at the blowout port (6) variable;
A drive motor (9) for changing and controlling the wind direction posture of the wind direction change plate,
The wind direction changing plate has a boss portion (20) for fitting a drive shaft (92) to a side portion of the drive motor (9),
The boss portion (20) includes a columnar protrusion (22) protruding in the direction of the air passage forming wall (10) constituting the air outlet (6) from a side end portion of the wind direction changing plate, and the columnar protrusion. (22) having a drive shaft fitting hole (23) for fitting the drive shaft (92) formed in the inside;
The air passage forming wall (10) has a through portion (30) that penetrates the coupling portion between the boss portion (20) and the drive shaft (92),
The penetrating part (30) is a cylindrical protrusion formed to protrude from the flat part of the air passage forming wall (10) toward the drive motor (9) so as to surround the outer peripheral side surface of the columnar protruding part (22). Part (31) and the cylindrical gap (S1) formed between the outer peripheral surface of the columnar protrusion (22) and the inner peripheral surface of the cylindrical protrusion (31) on the drive motor (9) side An inner collar part (32) formed at the tip of the cylindrical protrusion (31),
The inner flange portion (32), have a through hole for passing (33) bearing portion of said drive shaft (92) projecting from said drive motor (9) to (91),
The drive motor (9) is fixed to the air passage forming wall (10) so that the bearing portion (91) is located in the through hole (33),
An air conditioner configured such that a clearance (S2) between an inner peripheral surface of the through hole (33) and an outer peripheral surface of the bearing portion (91) is smaller than the cylindrical clearance (S1) . The drive motor (9) is fixed to the side surface of the air passage forming wall (10),
A side surface (96) of the drive motor (9) on the drive shaft (92) side is attached to a surface portion of the inner flange portion (32) or leaving a clearance of a manufacturing tolerance.
The air conditioner according to claim 1 . The drive shaft fitting hole (23) formed in the columnar protrusion (22) of the boss portion (20) and the drive shaft (92) of the drive motor (9) are at least partially formed in a non-circular cross section. Configured to fit in
The air conditioner according to claim 1 or 2 .