JP2002243262A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for vehicle where the reduction of noises is achieved. SOLUTION: The air conditioner for vehicle is equipped with doors 16, 17, and 18 for adjusting the direction of ventilation provided within an air duct and displaced. Abutting parts 23a and 24 which are provided in that air duct and abut on the above doors 16, 17, and 18, and the sections of abutting on those abutting parts 23a and 24 of the above doors 16, 17, and 18 are paralleled with each other, just before the specified air duct closes totally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, and more particularly to a door structure provided in a unit in which an evaporator and a heater are arranged and for changing a ventilation direction in the unit.

[0002]

2. Description of the Related Art In a conventional vehicle air conditioner, FIG.
The door 50 as shown in FIG. This door 50
Is supported by a rotating shaft, so that the angle can be changed in accordance with the adjustment of the ventilation amount to a predetermined air path,
Seal portions 51 are provided at both ends. When the seal portion 51 comes into contact with the contact portion 53 formed in the air passage, the door 50 is fully closed, and the amount of air flowing through the air passage can be reduced to zero.

[0003]

However, in the above-mentioned conventional vehicle air conditioner, immediately before the door reaches the fully closed position,
That is, when the gap between the door and the contact portion formed in the air path becomes small, there is a problem that noise such as wind noise is generated. The cause of this noise is considered to be that turbulence occurs in the flow of the air when the air passes through a minute gap between the seal portion of the door and the contact portion formed in the air passage. .

Accordingly, an object of the present invention is to provide a vehicle air conditioner in which noise is reduced.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to an air conditioner for a vehicle, which is provided in an air passage and has a door that adjusts a ventilation direction by being displaced. Immediately before the fully closed state, a contact portion provided in the air passage and contacting the door and a portion of the door contacting the contact portion are parallel to each other (claim 1).

[0006] According to this, at a position immediately before the door is fully closed, the air passing through the minute gap formed between the contact portion formed in the air passage in the unit case and the door is provided. Since turbulence does not easily occur, noise such as wind noise can be reduced. In addition, since there is no need to provide a separate member or the like, it can be executed at low cost.

Further, as a result of investigation by the inventor, it has been found that noise is likely to be generated when the gap between the door and the contact portion is 2 to 6 mm. The reason why the contact portion and the contact portion are parallel is that the gap between the contact portion and the contact portion of the door with the contact portion is 2 mm.
It is preferable that the distance be 6 mm.

The contact portion and the portion of the door that comes into contact with the contact portion immediately before the air path is fully closed are parallel to the contact portion when the door is opened. It is good at the part of the door which is displaced to the upstream side in the ventilation direction from the door (claim 3).

At the location where the door is displaced upstream in the ventilation direction when the door is opened, air flows in the direction from the end of the door toward the center, but wind noise and the like are particularly likely to occur at such locations. Therefore, it is effective to make the door and the contact portion parallel to each other immediately before the ventilation passage is closed at least in the above-mentioned location.

Further, it is preferable that a portion of the door that comes into contact with the contact portion is formed of an elastomer.

In the present invention, the door and the contact portion are made to be parallel to each other immediately before the door is brought to the fully closed position. Contacts the abutment inside. Therefore, by forming the portion (seal portion) that comes into contact with the contact portion of the door from an elastomer, which is a polymer substance exhibiting a large rubber elasticity at around normal temperature, the elastomer is in contact with the contact portion when the door is fully closed. Since it is deformed and adhered along the shape, good airtightness can be secured.

Preferably, the door is at least one of an air mix door and a blow mode switching door.

The present invention is suitable for an air mix door for adjusting the amount of air passing through an evaporator and a heater based on a set temperature, and a blow mode switching door for switching a blow mode such as a defroster, a vent, and a foot. Can be used for

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

A vehicle air conditioner 1 according to a first embodiment shown in FIG. 1 has an air inlet 8 through which air sent from a blower unit (not shown) is blown, and a windshield provided inside the vehicle. A DEF communication port 10 communicating with a defroster outlet that blows wind toward the vehicle, a VENT communication port 11 that is provided inside the vehicle and that communicates with a vent outlet that mainly blows wind toward the front of the occupant, and a foot of the occupant provided inside the vehicle. FOOT communication port 1 that communicates with the foot outlet that blows wind
And a unit case 2 in which a known evaporator 3 and a heater 4 are arranged.

In the unit case 2, a heater 4 is provided from an evaporator 3 to adjust the temperature of air blown into the vehicle.
There are provided an air mix door 16 for adjusting the amount of air to be blown into the air, and blow-off mode switching doors 17, 18, and 19 for changing the direction and amount of air to be blown according to the required blow-out mode.

As shown in FIGS. 1 and 2, the air mix door 16 has one end fixed to a rotating shaft that is rotated by a predetermined driving source, and a seal 26 formed of an elastomer at the other end. As shown in FIG. 1, the contact portion 23a located at one rotation end portion and the contact portion 23 located at the other rotation end portion are provided by the rotation of the rotation shaft.
It rotates in an arc in the range up to b. When the seal portion 26 of the air mix door 16 contacts one contact portion 23a, all the air flowing from the evaporator 3 is sent to the heater 4, and the seal portion 26 is connected to the other contact portion 23b. At the time of contact, the air sent from the evaporator 3 bypasses the heater 4 and connects to the DEF, VENT, FOOT communication ports 10, 11,.
It is blown out from any one of the outlets of No. 12.

The blow mode switching door includes a DEF door 17, a VENT door 18, and a FOOT door 19.
These include, as shown in FIG.
It has an arm portion 31 and a seal portion 33. The rotating shaft 30 is rotatable by a predetermined driving source, and the arm portion 31 has a shape bent in a substantially “<” shape, and a substantially central portion thereof is fixed to the rotating shaft 30. . The seal portion 33 is formed of an elastomer, and is fixed to both ends of the arm portion 31. The sealing portion 33 has a tip portion 34 formed to be thinner than other portions.
The front end portion 34 has a contact surface 34a that comes into contact with the contact portion 24 formed integrally with the inner wall of the unit case 2, and the doors 17, 18, 19 are fully closed. At this time, the distal end portion 34 comes into contact with the contact portion 24 to block the ventilation.

Further, as in the DEF door 17 shown in FIG. 2, the blowout mode switching doors 17, 18, 19 in this embodiment have the contact portion 24 and the seal portion 33 at the position immediately before the fully closed state. When a minute gap d is formed between the contact portion 34a and the contact surface 34a, the contact portion 24 and the contact surface 34a are parallel to each other. Note that the gap d is 2 to 6
It is preferable to set the distance in the range of mm.

In this embodiment, VEN
The door 18 for T and the door 19 for FOOT also have the same seal portion 33 as the door 17 for DEF.

Further, in the sealing section 26 of the air mix door 16, the blow mode switching doors 17, 1 are also provided.
Similarly to the seal portions 33 of 8 and 19, when the contact surface 26a of the seal portion 26 comes to a position immediately before contact with the contact portion 23a (a position similar to the gap d), the contact surface 26a and the contact portion 2
3a are parallel to each other, and the same applies to the opposite contact surface 26b and the contact portion 23b.

As described above, each of the doors 16, 17, 18,
The contact surfaces 26 of the seal portions 26 and 33 when the contact portions 23a, 23b and 24 provided in the respective air passages form a minute gap d.
a, 26b, 34 and the contact portions 23a, 23b, 24 are parallel to each other, so that the minute gap d
The turbulence of air passing through is suppressed, and noise is reduced. Further, as a result of the investigation by the inventor, the minute gap d was set to 2 to 6 m.
By setting the range of m, the effect of noise reduction can be obtained most.

Before the seal portions 26, 33 and the contact portions 23a, 23b, 24 come into contact with each other as described above, the contact surfaces 26a, 26b, 34a and the contact portions 23a, 23b, 24
Are parallel to each other, so that when the closed state is attained, the contact portions 23a, 23
b, 24, but the sealing portions 26, 33
Is formed of an elastomer and has elasticity, so that the seal portions 26 and 33 are in contact with the contact portions 23a and 2a.
Since it deforms and adheres along the slope of 3b, 24, sufficient sealing performance can be secured.

In the following, another embodiment of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals are assigned to parts having the same or similar effects as in the first embodiment. Description is omitted.

In the second embodiment shown in FIG.
DEF door 17, VENT door 18, and FOOT
The shape of the distal end portion 38 of the seal portion 37 of the door 19 (not shown) is changed to be slightly thicker. Also in this embodiment, the seal portion 37 is formed of an elastomer so that when the gap between the contact surface 38a and the contact portion 24 becomes d, the contact surface 38a and the contact portion 24 become parallel. ing.

The same noise reduction effect as in the first embodiment can be obtained by using the seal portion 37 having the shape shown in FIG. 3, and according to such a shape, Since the elastic force of the distal end portion 38 is increased, the sealing performance can be improved. As described above, it is preferable to appropriately change the shape of the seal portion according to the purpose.

[0027]

As described above, according to the present invention, it is possible to provide a vehicle air conditioner with reduced noise.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure in a unit of a vehicle air conditioner according to a first embodiment of the present invention.

FIG. 2 is an enlarged view in a unit showing a structure of a damper of the vehicle air conditioner according to the first embodiment.

FIG. 3 is an enlarged view in a unit showing a structure of a damper of a vehicle air conditioner according to a second embodiment.

FIG. 4 is a diagram showing a structure in a unit of a conventional vehicle air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air conditioner for vehicles 2 Unit case 3 Evaporator 4 Heater 8 Inlet 10 DEF communication port 11 VENT communication port 12 FOOT communication port 16 Air mix door 17 DEF door 18 VENT door 19 FOOT door 23, 24 applicable Contact part 26 Seal part 26a, 26b Contact surface 30 Rotating shaft 31 Arm part 33 Seal part 34 Tip part 34a Contact surface 37 Seal part 38 Tip part 38a Contact surface d Gap

Continuation of the front page (72) Inventor Takao Koike 39, Higashihara, Chiyo, Odai-gun, Osato-gun, Saitama Prefecture F-term (reference) 3L011 BH02 BJ02 3L081 AA03 AA08 AB03 FA07 FB06 FC01 FC02 HA09

Claims (5)

[Claims] 1. An air conditioner for a vehicle, comprising: a door provided in an air passage for adjusting a ventilation direction by being displaced, wherein the door provided in the air passage immediately before a predetermined air passage is fully closed. And a contact portion of the door contacting the contact portion and a portion of the door contacting the contact portion are parallel to each other. 2. The time immediately before the air path is completely closed is a time when a gap between the contact portion and a portion of the door contacting the contact portion is 2 to 6 mm. The vehicle air conditioner according to claim 1. 3. The contact portion and a portion of the door that comes into contact with the contact portion immediately before the air path is fully closed are that the contact portion is opened when the door is opened. The vehicle air conditioner according to claim 1, wherein the air conditioner is located at a portion of the door that is displaced upstream in a ventilation direction. 4. The vehicle air conditioner according to claim 1, wherein a portion of the door that contacts the contact portion is formed of an elastomer. 5. The vehicle air conditioner according to claim 1, wherein the door is at least one of an air mix door and a blowing mode switching door.