JPH1114134A - Indoor machine of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent whistling sound from being produced during rotation of a wind direction plate for deflecting blow off air vertically. SOLUTION: The indoor machine is adapted such that a wind deflection plate 8 supported rotatably on support parts at a plurality of positions on left and right side walls of a blow off outlet, and positioned therebetween is rotated with a stepping motor 10 mounted coaxially on the one side wall of the blow off outlet to deflect blow off air vertically. As a result, a resilient coupling member 11 is interposed between a rotary shaft 8d of the wind deflection plate 8 and a rotary shaft 10a of the stepping motor 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner, and more particularly, to a structure of a wind direction plate provided at an air outlet of the indoor unit and a connecting portion of a stepping motor for rotating the wind direction plate.

[0002]

2. Description of the Related Art FIG. 1 shows the appearance of an indoor unit, and FIG. 2 shows the internal structure of the indoor unit. The housing 1 of the indoor unit includes a main body 1a, a front cover 1b detachably mounted on the main body 1a, and a front panel 1c attached to the front cover 1b so as to be openable and closable. Is provided with a suction port 2 for indoor air, and a blow-off port 3 for heat-exchanged air is provided at a lower portion. An air filter 5 is provided in an air passage 4 connecting the suction port 2 and the blow-off port 3, and a heat exchanger. 6 and a blower fan 7 for sending the heat-exchanged air to the air outlet 3 and the like, and the air outlet 3 is provided with one or two air direction plates 8 for deflecting the wind direction into the room up and down. .

[0003] The wind direction plate 8 is shaped like an elongated blade to the left and right as shown in FIG.
c and 8d are rotatably supported by left and right side walls of the outlet 3 and supporting portions 3a, 3b, 3c and 3d provided therebetween.
During cooling, the stepping motor 10 is coaxially mounted on one side wall of the outlet 3 and is held in a substantially horizontal direction during cooling.
At the time of heating, the blown air is deflected in the up-down direction by rotating and holding in a substantially vertical direction. FIG. 6 is an enlarged view showing the relationship between the conventional wind direction plate 8 and the stepping motor 10. The structure is such that it is directly connected to the concave portion 8e formed in the above.

[0004]

However, in the structure in which the rotating shaft 10a of the stepping motor 10 is directly connected to the rotating shaft 8d of the wind direction plate 8 as described above, the vibration of the driving pulse (200 PPS) of the stepping motor 10 is reduced. Rotary axis 1
In some cases, the noise is transmitted to the wind direction plate 8 through 0a and 8d, and resonates on the wind direction plate 8 side to generate abnormal noise. Accordingly, an object of the present invention is to provide an indoor unit of an air conditioner that prevents such generation of abnormal noise.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and a heat exchanger is provided in an air passage connecting an inlet at an upper portion of a housing and an outlet at a lower portion of the housing. And a blower fan for sending heat-exchanged air to the air outlet, and a wind direction plate rotatably supported by the air outlet at the left and right side walls of the air outlet and supporting portions provided at a plurality of locations therebetween. In the indoor unit of an air conditioner, the wind direction plate is rotated by a stepping motor coaxially attached to one side wall of the outlet to deflect the direction of the blown air up and down. The configuration is such that an elastic coupling member is interposed between the rotation shafts of the stepping motor. Further, in a configuration in which two upper and lower wind direction plates are provided at the outlet, and these are separately rotated by two independent stepping motors, the joint is provided between each wind direction plate and the rotation shaft of the stepping motor. The configuration is made via members. Further, the joint member is made of an elastic resin or an elastic rubber, and a concave portion or a convex portion corresponding to the shape of the tip of the rotating shaft of the stepping motor and the wind direction plate is provided on both end surfaces thereof. In addition, a configuration is provided in which an abutment for preventing rotation of the wind direction plate by a predetermined amount or more is provided at an inner upper end of the wind direction plate.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an elastic joint member is provided between a rotating shaft of a wind direction plate provided at an air outlet of an indoor unit and a rotating shaft of a stepping motor corresponding to the rotating shaft. Also, in the case where two upper and lower wind direction plates are provided at the air outlet, and these are separately rotated by two independent stepping motors, each wind direction plate and the rotation shaft of the corresponding stepping motor are provided. Since the joint member intervenes between them, vibration of the stepping motor can be absorbed by the joint member, and generation of abnormal noise when the wind direction plate rotates can be prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows the appearance of an indoor unit, where 1 is a main body 1a, a front cover 1b detachably mounted on the main body 1a, and a front panel 1c attached to the front of the front cover 1b so as to be freely opened and closed. It is a housing consisting of: An upper portion of the housing 1 has an inlet 2 for indoor air, and a lower outlet is formed with an outlet 3 for sending heat-exchanged air indoors. The inside of the housing 1 is configured as shown in FIG. 2, and a detachable air filter 5 is provided in an air passage 4 between the inlet 2 and the outlet 3, and a heat exchanger divided into a plurality of parts and bent back and forth. 6 and a blower fan 7 for sending out the air exchanged by the heat exchanger 6 to the air outlet 3. The air outlet 3 is provided with a wind direction plate 8 for deflecting the air flow into the room in the vertical direction. ing. In addition, there are only one wind direction plate 8 as shown in FIG. 2A, and one provided vertically above as shown in FIGS. 1 and 2B.

As shown in FIG. 3, for example, the wind direction plate 8 is formed into a long and narrow blade shape in accordance with the shape of the air outlet 3.
A rotating shaft 8a integrally provided at a plurality of positions on the left and right and between the left and right,
8b, 8c, and 8d are rotatably supported by left and right side walls of the outlet 3 and support portions 3a, 3b, 3c, and 3d provided therebetween. A stepping motor 10 mounted coaxially with a screw 9 is used to rotate and hold in a substantially horizontal direction during cooling, and to rotate and hold in a substantially vertical direction during heating to deflect the blown air vertically. In the present embodiment, as shown in FIG. 4, a configuration is adopted in which an elastic joint member 11 is interposed between a rotation shaft 8d of the wind direction plate 8 and a corresponding rotation shaft 10a of the stepping motor 10,
As shown in FIG. 2 (b), the upper and lower two wind direction plates 8 are provided at the air outlet 3, and these are separately rotated by two independent stepping motors (not shown). A joint member 11 as shown in FIG. 4 is interposed between each wind direction plate 8 and the corresponding rotation shaft of the stepping motor.

The joint member 11 may be made of, for example, an elastomeric resin or rubber as long as it has elasticity. One end is provided with a convex portion 11a corresponding to the concave portion 8e formed on the rotary shaft 8d of the wind direction plate 8, At the other end, a projection 10 formed at the tip of a rotating shaft 10a of the stepping motor 10
For example, a concave portion 11b corresponding to b is provided between the wind direction plate 8 and the stepping motor 10 to indirectly transmit the power of the stepping motor 10 to the wind direction plate 8. FIG. 5 shows another embodiment in which the shape of the above-described joint member 11 and the like is changed. In any case, the above-described joint member 11 is interposed between the wind direction plate 8 and the stepping motor 10. As the vibration of the stepping motor 10 can be absorbed by the joint member 11,
The occurrence of abnormal noise can be prevented. Note that the shapes of the wind direction plate 8 and the rotating shafts 8d and 10a of the stepping motor 10 and the corresponding joint member 11 are not limited to those shown in the drawings, and may be other shapes. It should be noted that a contact portion 8f for preventing rotation of the wind direction plate by a predetermined amount or more at the time of startup is provided at the inner upper end portion of the wind direction plate.

[0010]

As described above, in the case of an indoor unit in which the joint member as described above is provided between the rotation axis of the wind direction plate and the rotation axis of the stepping motor for rotating the wind direction plate, the vibration of the stepping motor is absorbed by the joint member. This eliminates the transmission of vibration to the wind direction plate, eliminates generation of abnormal noise from the wind direction plate, and improves quality.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an indoor unit according to the present invention and a conventional example.

FIG. 2 is a side sectional view of an indoor unit according to the present invention and a conventional example.

FIG. 3 is an exploded perspective view showing a relationship among an air outlet, a wind direction plate, and a stepping motor of an indoor unit according to the present invention and a conventional example.

FIG. 4 is an enlarged perspective view of a joint member and the like showing the first embodiment of the present invention.

FIG. 5 is an enlarged perspective view of a joint member and the like showing a second embodiment of the present invention.

FIG. 6 is an enlarged perspective view of a wind direction plate and a stepping motor showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 housing 2 suction port 3 outlet 6 heat exchanger 7 blower fan 8 wind direction plate 8a rotation shaft 8e recess 8f contact portion 10 stepping motor 10a rotation shaft 10b protrusion 11 joint member 11a protrusion 11b recess

Claims (5)

[Claims] A heat exchanger, a blower fan for sending heat-exchanged air to an air outlet, and the like are provided in an air passage connecting an air inlet at an upper portion of the housing and an air outlet at a lower portion of the housing. At the exit, a wind direction plate is provided rotatably supported by the left and right side walls of the air outlet and supporting parts provided at a plurality of positions therebetween, and a stepping motor coaxially attached to the air direction plate on one side wall of the air outlet. An indoor unit of an air conditioner that rotates and deflects the direction of blown air up and down, characterized in that the indoor unit is provided with an elastic joint member between the wind direction plate and the rotation shaft of the stepping motor. Indoor unit of air conditioner. 2. An upper and lower wind direction plate is provided at the outlet.
2. The air conditioner according to claim 1, wherein the two members are separately rotated by two independent stepping motors, and the joint member is interposed between each wind direction plate and a rotation shaft of the stepping motor. Indoor unit. 3. The indoor unit of an air conditioner according to claim 1, wherein concave portions or convex portions corresponding to the shapes of the wind direction plate and the tip of the rotating shaft of the stepping motor are provided on both end surfaces of the joint member. 4. The indoor unit of an air conditioner according to claim 1, wherein the joint member is made of an elastic resin or an elastic rubber. 5. The indoor unit of an air conditioner according to claim 1, wherein a contact portion for preventing rotation of the wind direction plate by a predetermined amount or more is provided at an inner upper end portion of the wind direction plate.