JPH0332920Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention provides for wind direction plates having surfaces inclined with respect to the rotational axis to be arranged in parallel at a predetermined interval in the direction of the rotational axis; The present invention relates to a wind direction changing device for an air conditioner, called a louver, in which an electric motor is interlocked with a wind direction plate.

(Prior Art) In this type of wind direction changing device, the wind direction plate is made of heat-resistant resin, but the length of the wind direction plate in the rotation axis direction is constant. Therefore, when the wind direction plate expands due to the temperature change of the blown air, the wind direction plate is bent and deformed, causing the spacing between adjacent wind direction plates to be distorted, causing a change in air volume, and causing damage such as cracks. There was a problem.

Therefore, in order to prevent bending deformation due to expansion of the wind direction plate, for example,
The one shown in Publication No. 85747 is known.
FIG. 6 is a partially cutaway side view of the wind direction converting device described in the conventional example, and FIG. 7 is a side view of the main part of FIG. 6. In these figures, 101 is a support shaft, 102 is a wind direction plate, 103 is a cylindrical part integrated with two wind direction plates 102, and 104 is an electric motor (not shown).
It is a coupling part that is integrally rotatably connected to the cylindrical parts 103 and the cylindrical part 10 on one end side.
3 and the connecting portion 104 form a crank-shaped joint portion 105.
are connected via. These wind direction plates 102
. . . is formed by injection molding together with the coupling portion 104 while the support shaft 101 is held in a mold. Then, due to thermal expansion due to temperature changes, the wind direction plates 102... and the support shaft 10
Even if the support shaft 1 becomes loose, the joint part 105 prevents the wind direction from shifting.
The expansion and contraction of the cylindrical portions 103 in the axial direction of the 01 are also absorbed by the joint portions 105.

FIG. 8 is a perspective view of a main part of another embodiment shown in the above-mentioned conventional example, in which a groove 106 is formed on the surface of the support shaft 101 to prevent positional deviation in the rotational direction of the wind direction plates 102. In addition, a stopper 107 is provided protruding from the cylindrical portion 103 to prevent
03 in the direction of the rotation axis can be prevented.

FIG. 9 is a sectional view of a main part of still another embodiment shown in the above-mentioned conventional example, and the surface of the support shaft 101 has dents 108 or small Protrusions 109 are provided, and the cylindrical portion 103 is engaged with and integrated with them during injection molding, and the wind direction plate 102 in the direction of rotation and the direction of the rotation axis is formed.
It is configured to prevent distortion and misalignment of...

(Problems to be Solved by the Invention) However, the conventional example having such a configuration has the following drawbacks.

A type with a crank-shaped joint (corresponding to the one in Fig. 7) It has the disadvantage that it takes time and effort to hold the support shaft 101 in the injection mold during injection molding, resulting in high production costs. . Further, there is a drawback that the expansion and contraction of the joint portion 105 itself causes the adjacent wind direction plates 102, 102 to be misaligned.

Support shaft with a groove (corresponding to the one in FIG. 8) Since the groove 106 is formed on the support shaft 101, there is a drawback that the production cost of the support shaft 101 is high, and the stopper 107 acts when the degree of expansion is large, and in a steady state the stopper 107 does not act and is not effective.

A device with recesses and small protrusions (corresponding to the one in FIG. 9) Similar to the case described above, there was a drawback that the manufacturing cost was high due to the machining of the recesses 108 or small protrusions 109.

The present invention was developed in view of these circumstances, and is capable of preventing positional deviations of the wind deflector in the rotational direction and rotational axis direction due to thermal expansion and contraction, while also reducing the manufacturing cost. The purpose is to reduce costs.

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a rigid motor 20 that is integrally rotatably interlocked with the electric motor 20 in the air direction converter of the air conditioner described at the beginning. A support shaft 23 having a polygonal cross-sectional shape, the wind direction plate 24 fitted into the support shaft 23 so as to be integrally rotatable and slidable in the direction of the rotation axis P, and the wind direction plates 24 arranged side by side. The parallel length of the wind direction plate 24 and the support shaft 23 are interposed in the middle of the direction.
It is characterized by comprising an elastic body 25 that absorbs a relative change in length with respect to the length in the axial direction.

(Function) According to this characteristic configuration, by fitting each of the wind direction plates 24 into the support shaft 23, the driving torque of the electric motor 20 is transmitted from the support shaft 23 to each of the wind direction plates 24 separately, thereby driving each of the wind direction plates 24. In addition, even if each of the wind direction plates 24 thermally expands or contracts due to a change in ambient temperature, the elastic body 25 absorbs the accompanying length change in the direction of the rotation axis P.
It can be absorbed by.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is a partially cutaway front view of an air conditioner according to an embodiment of the present invention, FIG. 2 is a view taken along the - arrow in FIG.
It is a partially cutaway side view of the figure. In these figures, 1 and 1 are a blower, 2 is a heat exchanger, and 3 is a drain pan, and these blower 1, heat exchanger 2, and drain pan 3 are provided in the air conditioner main body 4,
Air is sucked from the suction port 5 by the blower 1,
The suction air is passed through a heat exchanger 2, passed through a blowout path R, and is blown out from a blowout port 6. In the figure, reference numeral 7 denotes a decorative panel, and this decorative panel 7 is provided with a suction grill 8 corresponding to the suction port 5 and a blow-out portion 9 corresponding to the blow-off port 6.

The blowers 1, 1 are interlocked and connected to an electric motor 10 disposed between them.

An auxiliary heater 11 is provided in the middle of the blowout path R.

A pair of brackets 12 are connected to the outer surfaces of each of the side plates 4a, 4a facing each other in the longitudinal direction of the air conditioner main body 4, and each of these brackets 12 has a hanging bolt 13 embedded in a concrete slab. At the same time as being inserted,
They are connected and fixed via nuts 14, whereby the air conditioner main body 4 is suspended and supported.

The decorative panel 7 includes an outer frame 15 and an outer frame 1
5, and an opening/closing panel 16 connected to the opening/closing panel 16 such that it can swing open/close and be fixed around a predetermined horizontal axis on the side far from the blowout part 9. Opening/closing panel 1
6 is formed with the suction grille 8, and the blowing portion 9 is formed between the free end edge of the open/close panel 16 in the closed state and the outer frame 15 facing thereto. There is.

A temperature-sensitive thermistor 17 for overheating prevention is provided in the middle of the blowout route R, closer to the blowout port 6 than the auxiliary heater 11, and detects the temperature of the blowout air, and when the detected temperature exceeds the set temperature. , the auxiliary heater 11 is turned off.

A louver 18 serving as a wind direction converting device which horizontally adjusts the blowing direction of the temperature-controlled air and which is the object of the present invention and a flap 19 which adjusts vertically are attached to a location close to the blowing outlet 6. A first electric motor 20 with a gear type reduction mechanism is interlocked with the louver 18, and a second electric motor 22 with a gear type reduction mechanism is interlocked with the flap 19 via a crank mechanism (partially not shown) 21. connected.

As shown in FIG. 4, the louver 18 includes a support shaft 23 made of brass and made of rigid hexagonal cross-section, a wind direction plate 24 made of resin each molded into the same shape, and an elastic body 25. , an intermediate connecting member 26 that interlocks and connects the first electric motor 20 and the support shaft 23; and a bearing that supports the end of the opposite side of the connection with the first electric motor 20 on the case wall 27 via a resin bushing 28. It is composed of a member 29 for use.

One end in the longitudinal direction of the intermediate connecting member 26 is interlocked and integrally rotatable with the output shaft 30 of the first electric motor 20, and the support shaft 23 is fitted into the other end, so that the support shaft 23 is connected to the output shaft 30. The shaft 23 is interlocked and integrally rotatably connected.

Further, as shown in FIG. 5, a hexagonal through hole 31 is bored in the cylindrical portion 24a of each of the wind direction plates 24, and the cylindrical portion 24a is fitted into the support shaft 23, so that the wind direction plates 24... Each is connected to rotate integrally with the support shaft 23 while allowing sliding movement in the direction of the rotation axis P of the support shaft 23.

Further, the bearing member 29 also has a hexagonal hole 3.
2 is formed into a bearing member 29 by fitting it into the bearing member 29.
is connected to the support shaft 23 so as to be freely rotatable.

The cylindrical portion 24a... A positioning projection 33 is provided protrudingly provided at one location in the circumferential direction on one end side in the longitudinal direction, and the positioning projection 33 of the adjacent wind direction plate 24 is provided on the other end side in the longitudinal direction. A positioning recess 34 into which the wind direction plate 2 is inserted is formed as a notch.
4... into the support shaft 23, the support shaft 23
The structure is such that the phase in the circumferential direction can be precisely matched.

Each of the wind direction plates 24 is made of, for example, a heat-resistant material.
It is made of heat-resistant resin such as ABS resin.

The elastic body 25 is made of a material with a high elastic modulus, such as chloroprene rubber (CR rubber), and due to temperature changes during cooling or heating, or temperature changes between heating and cooling, the cylindrical portion 24a Even if ... thermally expands or contracts, the accompanying wind direction plate 2
3... in the juxtaposed direction and the length of the support shaft 23 in the axial direction.

The elastic body 25 is not limited to one, but a plurality of elastic bodies may be interposed, and the intervening location is not limited to the end side, but may be the center of the support shaft 23 in the longitudinal direction.

In addition, the support shaft 23 is not limited to a hexagonal cross-sectional shape, and in the present invention, for example, a pentagonal shape, etc.
In short, it only needs to be a polygon.

(Effect of the invention) As described above, according to the invention, the positioning of each of the wind direction plates 24 in the rotation direction is performed using the support shaft 24.
Since it is performed individually for each, it is possible to prevent positional deviation in the rotational direction due to thermal expansion and contraction,
Even if each of the wind direction plates 24 thermally expands and contracts and expands and contracts in the direction of the rotation axis P, each of the wind direction plates 24 slides with respect to the support shaft 23 as the expansion and contraction occurs, and the expansion and contraction is finally controlled. Absorbed by the elastic body 25,
Relative displacement of the wind direction plate 24 in the direction of the rotation axis P can be prevented, and since the support shaft 23 is configured to have a polygonal cross-sectional shape, for example, a ready-made bar such as a hexagonal shaft can be used. This makes the support shaft 23 cheaper, and since the wind direction plate 24 is fitted into the support shaft 23, the support shaft 23 can be made cheaper during injection molding.
This eliminates the troublesome effort of holding the wind direction plate 24 in a mold, and it is sufficient to simply mold the wind direction plate 24 of the same shape, making it possible to manufacture the wind direction changing device as a whole at low cost.

[Brief explanation of the drawing]

Fig. 1 is a front view of an air conditioner according to an embodiment of the present invention, Fig. 2 is a partially cutaway view taken along the - line in Fig. 1, and Fig. 3 is a partially cutaway side view of Fig. 1. Figure, 4th
5 is an exploded perspective view of the main parts of the louver, FIG. 6 is a partially cutaway side view of a conventional wind direction conversion device, and FIG.
FIG. 8 is a perspective view of another embodiment of the conventional example, and FIG. 9 is a sectional view of the essential part of still another embodiment of the conventional example. 20...First electric motor, 23...Support shaft, 24...
...Wind direction plate, 25...Elastic body, P...Rotation axis center.

Claims (1)

[Claims for Utility Model Registration] Wind direction plates 24 made of heat-resistant resin having surfaces inclined with respect to the rotation axis P are arranged in parallel at a predetermined interval in the direction of the rotation axis P, and the wind direction plates 24
A wind direction changing device for an air conditioner in which an electric motor 20 is interlocked and connected to the motor 20, the support shaft 23 being rigid and having a polygonal cross-sectional shape, which is interlockingly connected to the electric motor 20 so that it can rotate integrally with the support shaft 23. The wind direction plate 24 is fitted freely and slidably in the direction of the rotation axis P, and the wind direction plate 24 is interposed at a midway point in the direction in which the wind direction plate 24 is arranged side by side, and the side-by-side length of the wind direction plate 24 and the support shaft are interposed. 23
A wind direction changing device for an air conditioner, comprising an elastic body 25 that absorbs a relative change in length with respect to the axial length of the air conditioner.