JPH1159160A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent whistling sound generated in a state where a door opens an air passing port a little, by shutting off the intermediate part of a long and thin clearance to be generated between the door and the air passing port by means of a projecting member provided on the door when the door opens the air passing port a little. SOLUTION: An air mix door 1 (hereinafter, a door) for adjusting the ratio of the flow rate of air detouring an air heating means (a heater core) and the flow rate of air passing the air heating means is arranged in an air conditioner case so as to be rotated around a rotational shaft 3a. A first and a second packings 4, 5 for sealing a cooling air bypass port 2 and an air heating means inlet are joined to the facing surfaces of a plate material 3b for forming a door main body 3 of the door 1. A projecting member 6 is joined in the central part on the turning end side of the first packing 4. Therefore, when the door 1 opens the cooling air bypass port 2 a little, the central part of a fine clearance S between the cooling air bypass port 2 and the door 1 is shut off, and therefore, whistling sound is prevented from being generated.

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 plate-like door capable of opening and closing an air passage provided in an air conditioning case.

[0002]

2. Description of the Related Art When a door of an air conditioner is manually operated, an air passage opening may be set to be opened in a small amount. In addition, even when automatically operated using an electric motor or the like, an air passage (a cold air passage or a hot air passage) such as an air mix door (a door that adjusts the ratio of cold air to hot air). ) May be set to a small open state.

[0003]

SUMMARY OF THE INVENTION As indicated above,
If the door is set to open a small amount of air passage,
An elongated gap is created between the door and the air passage, and air flows through the gap, so that a whistling sound may be generated. As means for preventing the whistling noise, there is known a technique in which a convex member is integrally provided in an air-conditioning case so as to block a central portion of an elongated gap. However, it is often difficult to realize that the convex member is provided integrally with the air passage opening of the air conditioning case due to the restriction of cutting off the air conditioning case.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air conditioner capable of easily preventing a whistling sound generated when a door opens a small amount of an air passage.

[0005]

[Means for Solving the Problems]

[Means of claim 1] When the door opens a small amount of the air passage,
A convex member provided on the door blocks an intermediate portion of an elongated gap formed between the door and the air passage. As a result, the length of the gap is reduced, and the generation of a whistling sound is prevented. By providing a convex member on the door, the occurrence of whistling noise can be prevented, so that whistling noise countermeasures can be easily implemented.

[Means for Claim 2] Since the convex member is attached to the door, measures against whistling noise can be implemented without changing the existing door.

[0007] Since the convex member is provided by the components of the door, the number of parts and the number of manufacturing steps can be reduced, and the cost can be reduced.

[0008]

Next, embodiments of the present invention will be described with reference to examples and modifications. [Embodiment] FIG. 1 is a sectional view of a main part of an air conditioner for a vehicle, FIG. 2 is a perspective view of FIG. 1, and FIG. Air heating means (for example, heater core) inside the air conditioning case
Air mixing door 1 (hereinafter, referred to as an air mixing door 1) that adjusts the ratio of the air flow rate bypassing the air flow to the air flow rate passing through the air heating means.
Door) is arranged. The door 1 can be continuously varied from a state in which a cold air bypass port 2 (corresponding to an air passage port) is fully closed by an unillustrated servomotor to a state in which an air heating means entrance (not shown) is fully closed. .

The door 1 is used to seal a door body 3 made of a resin molded product integrally provided with a rotating shaft 3a and a plate 3b, and a cool air bypass port 2 joined to one surface of the plate 3b. A first packing 4 and a second packing 4 for sealing the inlet of the air heating means joined to the other surface of the plate 3b.
Packing 5

At the center (an example of an intermediate portion) on the rotation end side of the first packing 4, one convex member 6 is joined to the door 1 with an adhesive or the like. The convex member 6 is made of a material capable of blocking air flow, such as a rubber material, a resin material, and a foamed resin material.
As shown in FIG. 2, when the door 1 slightly opens the cold air bypass port 2, the center of the minute gap S between the cold air bypass port 2 and the door 1 is shut off as shown in FIG.

As described above, when the door 1 opens the cool air bypass port 2 by a small amount, the convex member 6 provided on the air mixing door is
Slender gap S generated between door 1 and cold air bypass port 2
Is divided into two, the length of the gap S through which the air flows becomes shorter, and the occurrence of whistling noise is prevented.

[Modification] In the above embodiment, an example was shown in which the convex member 6 provided separately from the door 1 was retrofitted to the convex member 6, but the member (door body or packing) constituting the door was provided. Etc.) to form a convex member. That is, as shown in FIG. 4, the convex member 6 may be provided integrally with the first packing 4 or, as shown in FIG.
Alternatively, the convex member 6 may be provided integrally. In the above example,
Although the example in which one convex member 6 is provided in the door and the gap is closed to two is shown, a plurality of convex members may be provided in the door to block the gap to three or more. In the above embodiment, the example in which the present invention is applied to the air mix door 1 has been described. However, the present invention may be applied to other doors (for example, an inside / outside air switching door, a mode switching door, and the like).

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a vehicle air conditioner (embodiment).

FIG. 2 is an I view of FIG. 1 (Example).

FIG. 3 is a plan view of an air mix door (Example).

FIG. 4 is a sectional view of a main part of a vehicle air conditioner (modification).

FIG. 5 is a sectional view of a main part of a vehicle air conditioner (modification).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door 2 Cold air bypass port (air passage port) 3 Door main body 3a Rotating shaft 3b Plate material 4 First packing 5 Second packing 6 Convex member S Clearance

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yukio Sato 1-1-1, Showa-cho, Kariya-shi, Aichi Pref.

Claims (3)

[Claims] 1. An air conditioner comprising: an air conditioning case having an air passage through which an air flow can pass; and a plate-like door capable of opening and closing the air passage. The air conditioner according to claim 1, wherein one or more convex members are provided to block an intermediate portion of the gap when the door opens the air passage opening by a small amount. 2. The air conditioner according to claim 1, wherein the convex member is provided separately from the door and is joined to the door. 3. The air conditioner according to claim 1, wherein the door comprises: a door main body provided with a rotating shaft and a plate material integrally provided; and a packing joined to a surface of the plate material. Is formed by one of the door body and the packing.