JPH09226347A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of collisional noise at the time of closing an opening part of a door, to favourably hold a sealing property of the door and to reduce cost without increasing operational force. SOLUTION: An opening part 14 is opened and closed by a door 17 with a support shaft 18 which is a revolutional center in a circumference of the opening part 14 of an air passage, either of the opening parts 14 is selectively closed in a state where packings 33, 34 on the side of the door 17 make contact with sealing surfaces 26, 27 in the circumference on the inner surface side of the opening 14, cushioning protruded parts 28, 29 are furnished on both sides in the cross direction of the door 17 on the sealing surfaces 26, 27 of the opening part 14, the cushioning protruded parts 28, 29 are arranged at a position to the support shaft 18 which is the revolutional center of the door 17, and instant face contact of the door 17 on the opening part 14 is prevented by the cushioning protruded parts 28, 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having a door having a center of rotation around an opening of an air passage and closing the opening in a state where the door is in contact with a sealing surface around the opening. It relates to the device.

[0002]

2. Description of the Related Art In the case of an automobile air conditioner, as shown in FIG.
By rotating the door 1 having the rotation center Ce at one end, the two openings 4, 5 of the air passage formed in the case 3 of the inside / outside air switching box 2 are selectively opened and closed. When the air passage is switched, the door 1 suddenly comes into surface contact with the entire surfaces of the seal surfaces 6 and 7 of the case 3, and a collision sound such as a pattern is generated.

In order to prevent the generation of such a collision sound, as shown in FIG. 8, the door 1 having a rotation center Ce at one end of the opening 4 of the air passage formed in the case 3 is rotated. The opening 4 is opened and closed by moving the opening 4
It is proposed that the convex portion 6a is provided on the other end side of the.

In the door 1, a convex portion 6a is continuously provided in the vicinity of the peripheral edge of the opening 4 on the side opposite to the center of rotation Ce, and the door packing 8 is closed when closed. , 9 comes into contact with the convex portion 6a. Such an air conditioner attempts to absorb the collision sound generated when the door 1 comes into contact with the case 3 when the door 1 for air distribution is rotationally controlled by the door packing 8 and the convex portion 6a. .

[0005]

However, in the conventional air conditioner shown in FIG. 8, there is a convex portion 6a on the side of the opening 4 opposite to the center of rotation Ce of the door 1, and this convex portion 6a is the door 1. Since it is provided continuously corresponding to the entire width of
The presence of the convex portion 6a increases the operation force of the door 1,
There is a drawback that the sealing property of the door 1 is also lowered.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to prevent a collision noise from being generated when an opening is closed by a door, An object of the present invention is to provide an inexpensive air conditioner that has good door sealing properties and does not increase operating force.

[0007]

To achieve the above object, the present invention opens and closes an opening by a door having a center of rotation around the opening of an air passage, and seals the circumference of the opening. In an air conditioner that closes the opening in a state where the packing on the door side is in contact with the surface, cushioning projections on both sides of the door in the width direction of the mutual contact surface of at least one of the door and the opening. And a buffer protrusion is disposed near the center of rotation to prevent the door from making a surface contact with the opening at once by the buffer protrusion.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the drawings, taking a case of a vehicle air conditioner as an example. FIG. 1 is a perspective view showing a heater unit of an automobile air conditioner according to an embodiment of the present invention and an inside / outside air switching box connected thereto, and FIG. 2 is a side sectional view showing a main part of the inside / outside air switching box. is there.

In the air conditioner 10, the connection port 12 of the inside / outside air switching box 11 is the air introduction port 1 of the heater unit 13.
6, the common air 17 is rotated to selectively open and close the outside air introduction opening 14 and the indoor air introduction opening 15 of the inside / outside air switching box 11.

The inside / outside air switching box 11 has a top plate 21 of the case 20 with an upward outside air introduction opening 14 and a front plate 22.
The indoor air introduction openings 15 are formed diagonally downward, and the support shaft 18 of the door 17 is formed by the side plates 23 of the case 20 in the vicinity of the intersection of the top plate 21 and the front plate 22.
Is rotatably supported.

As shown in FIG. 3, the indoor air introducing opening 15 has a sealing surface 27 with which the door 17 abuts around a quadrangular open portion, and the support shaft 1 which is the rotation center of the door 17 is provided.
The buffer convex portions 29, 29 made of synthetic resin and having a triangular cross section are provided integrally with the case 20 on both sides at a position near the opening edge nearer to eight. As shown in FIG. 3, the buffering convex portions 29, 29 are arranged symmetrically at right angles to the left and right side edges of the opening 15, that is, substantially straight and substantially parallel to the support shaft 18 of the door 17. The outside air introduction opening 14 is also provided with a similar sealing surface 26 and cushioning convex portion 28. The protruding size of the buffering protrusions 28 and 29 is set smaller than the thickness of the sponge packings 33 and 34 of the door 17.

FIG. 4 is a side view showing the door. Door 17
Includes a support shaft 18 and a resin plate-shaped door body 32,
Polyurethane sponge packings 33 and 34 are fixed to both sides of the door body 32, and the support shaft 18 is supported by both side plates 23 of the inside / outside air switching box 11 so as to be rotatable. By rotating the rotation link 37 attached to one end of the protruding support shaft 18, either the outside air introduction opening 14 or the indoor air introduction opening 15 can be selectively closed. .

When the door 17 closes the indoor air introduction opening 15, the sponge packing 34 first comes into contact with the ridge line 29a of the cushioning convex portion 29, as shown by the chain double-dashed line in FIG. The entire contact surface of the sponge packing 34 comes into contact with the sealing surface 27, so that the indoor air introduction opening 15 is closed while maintaining the sealing property without generating a collision noise. The same applies to the case where the outside air introduction opening 14 is closed.

According to the above-described embodiment of the present invention, since the buffer protrusions 28 and 29 are formed integrally with the case 20, the number of parts does not increase and the cost is low, and the opening 1 of the case 20 is small.
Only by providing the buffering convex portions 28 and 29 to the doors 4 and 15, the door 1
There is an advantage that it is possible to provide the air conditioner 10 in which no collision noise is generated when closing 7.

The present invention is not limited to the above embodiment, and various modifications can be made without adding new matter. For example, the present invention can be applied to household air conditioners other than automobiles, etc., and can be widely applied to openings sealed by the rotation of doors such as the heater unit 13 and the inside / outside air switching box 11. Further, as the buffer convex portion, the conical projections 29, 29 shown in FIG. 5A and the triangular pyramidal projection 2 shown in FIG. 5B are used.
It may be 9, 29, and this has the advantage that the operating force of the door 17 is further reduced. Then, in FIG. 3, cushioning convex portions 29, 29 may be provided at both ends of the seal surface 27a in the vicinity of the support shaft 18, and as shown in FIG. 6, the convex strips 40, 41 are provided on the sponge packing 33, 34 side of the door. Etc. can be provided.

[0016]

According to the present invention, buffer protrusions are provided on both sides of the mutual abutting surface of at least one of the door and the opening in the width direction of the door, and the buffer protrusions are located near the rotation center. Since the buffer convex portion prevents the door from making a surface contact with the opening all at once, no collision noise is generated when the door is closed, and the buffer convex portion is arranged on both sides. Therefore, the sealing performance of the door is not deteriorated and the operation force is not increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an exploded part of an automobile air conditioner according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a main part of an inside / outside air switching box of the air conditioner according to the embodiment of the present invention.

FIG. 3 is a perspective view of the opening according to the embodiment of the present invention as viewed from the inside.

FIG. 4 is a side view showing the structure of the door according to the embodiment of the present invention.

FIG. 5 is a perspective view showing a modified example of the buffer protrusion according to the embodiment of the present invention.

FIG. 6 is a side view showing a modified example of the door according to the embodiment of the present invention.

FIG. 7 is a side sectional view showing an example of a conventional air conditioner.

FIG. 8 is a cross-sectional view showing another example of a conventional air conditioner.

[Explanation of symbols]

 10 air conditioner 11 inside / outside air switching box 14, 15 opening 17 door 18 support shaft 20 case 26, 27 sealing surface 28, 29 cushioning convex portion 33, 34 packing 40, 41 convex ridge (buffering convex portion)

Claims (1)

[Claims] 1. An opening portion is opened and closed by a door having a center of rotation around the opening portion of the air passage, and the sealing portion around the opening portion is in contact with a packing on the door side. In the air conditioner for closing, a cushioning convex portion is provided on both sides of the mutual abutting surface of at least one of the door and the opening in the width direction of the door, and the cushioning convex portion is located near the rotation center. An air conditioner which is provided and prevents the door from making a surface contact with the opening all at once by the cushioning convex portion.