JP2002362131A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce operation force for an intake door, and prevent deterioration of seal material. SOLUTION: This air conditioner for a vehicle is provided with an intake door 10 provided with a rotary shaft 35 rotated by a prescribed drive source, and a circumferential surface formed to have an arc-shaped cross section, so that the circumferential surface selectively opens/closes an inside air intake port and an outside air intake port in accordance with rotation of the rotary shaft 35. A slide means is provided to let the intake door 10 slide in parallel to the rotation shaft 35 when the intake door 10 is within a prescribed range of its rotation range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner having an intake unit.

[0002]

2. Description of the Related Art Japanese Patent Laying-Open No. 9-188124 discloses a rotary-type intake door (rotary door) provided in an intake unit of a vehicle air conditioner. The rotary door has a circumferential wall having an arc-shaped cross section and is rotatable around a rotation axis.
Since the circumferential wall of the door that opens and closes the air inlet moves substantially parallel to the angle of entry of air, the air resistance is small, and the door operating force is reduced, noise is reduced, and the like.

[0003] In addition, the intake door is provided with sealing means for suppressing air leakage and preventing leakage of air so that a desired intake air can be obtained. In many cases, a sealing material is provided.

[0004]

However, in the prior art, each time the intake door rotates, the sealing material slides on the contact surface provided on the inner wall of the casing or the like. There has been a problem that the operating force of the door increases and the deterioration of the sealing material is further rapid.

Accordingly, an object of the present invention is to reduce the operating force of the intake door and to prevent deterioration of the sealing material.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a rotating shaft which is rotated by a predetermined drive source, and a peripheral surface having an arc-shaped cross section. In a vehicle air conditioner including an intake door that selectively opens and closes the inside air intake and the outside air intake with the rotation of the shaft, when the intake door is within a predetermined range of the rotation range. And a sliding means for sliding the intake door in parallel with the rotation axis (claim 1).

[0007] According to this, the sealing means including a sealing material and a contact surface provided on the intake door and the casing for preventing air leakage when the inside air intake or the outside air intake is closed is unnecessary. In such a case, it can be prevented from abutting. As a result, it is possible to reduce the operating force of the intake door and prevent the seal material from being deteriorated early.

Preferably, the predetermined range is a range where the intake door is located at a position where neither the inside air intake nor the outside air intake is completely closed.

According to this, when the intake door moves to the position where the inside air intake or the outside air intake is closed, that is, when the seal is not required, the operation force of the intake door can be reduced, and the wasteful operation is unnecessary. Wear of the sealing material can be prevented.

Preferably, the sliding means comprises a combination of the rotating shaft and a convex portion and a concave portion formed on a bearing of the rotating shaft.

[0011] According to this, since the convex portion and the concave portion are engaged or disengaged with each other depending on the position of the rotating shaft, the intake door fixed to the rotating shaft is parallel to the rotating shaft. Can be slid.

In addition, a fan for taking in air from the inside air intake or the outside air intake is provided, and a sealing material is disposed on a side surface of the intake door on the fan side. The intake door may be slid so as to move to the opposite side of the fan (claim 4).

In a rotary type intake door,
In many cases, a sealing material having a shape along the arc shape of the peripheral surface is arranged on the surface on the fan side. However, since this arc-shaped sealing material generates a large frictional force when the intake door is rotated, With such a configuration, it is possible to effectively reduce the operating force of the intake door and prevent deterioration of the sealing material.

[0014]

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

An air conditioner 1 for a vehicle according to a first embodiment of the present invention shown in FIG. 1 has an intake unit 2 for selectively taking in inside air and outside air, and sends out air taken in from the intake unit 2. And a heat exchange unit 4 for adjusting the air sent from the blower unit 3 to a desired temperature.

As shown in FIGS. 1 to 3, the intake unit 2 has an intake door 10 disposed in an intake case 5. The intake case 5 is made of a material such as resin, and has an outside air intake 6 for taking in outside air and an inside air intake 7 for taking in air in the vehicle compartment. The intake door 10 has a rotation shaft 35 connected to a predetermined drive source via a link mechanism 13, and the amount and direction of rotation of the rotation shaft 35 is controlled by a predetermined control device, so that the outside air is controlled. The intake 6 and the inside air intake 7 can be selectively opened and closed.

As shown in FIGS. 1 and 2, the blower unit 3 has an opening on the upstream side in the ventilation direction communicating with the intake unit 2, and a fan 26 is disposed inside the intake unit 2. The fan 26 is rotated by a motor 40 arranged outside the casing of the blower unit 3. The fan 26 and the motor 40 penetrate the casing of the blower unit 3, and have one end connected to the center of rotation below the fan 26 via a rotary shaft 41 whose other end is fixed to the drive shaft of the motor 40. The fan 26 in this embodiment is a known sirocco fan that radially sends out the air that has entered the center of rotation from the upper part thereof.
A fan of another structure may be used.

As shown in FIG. 1, the heat exchange unit section 4 communicates with an opening on the downstream side in the ventilation direction of the blower unit section 3 and includes therein a known evaporator in order from the upstream side in the ventilation direction. 21 and a heater 22 are arranged. Further, although not shown, air adjusted to a desired temperature is selected from a defroster outlet 23, a vent outlet 24, a foot and rear foot outlets 25a and 25b by a known air mix door or a known damper for selecting a blowout port. It is designed to be able to send it out to the passenger compartment.

In this embodiment, as shown in FIG. 2, the rotating shaft 35 of the intake door 10 and the rotating shaft 41 of the fan 26 are arranged in the same direction. As a result, the air taken into the intake unit 2 is easily guided to the center of the fan 26, so that the loss of the air volume can be reduced and the required arrangement space can be reduced.

As shown in FIGS. 1 to 5, the intake door 10 according to the first embodiment is generally called a drum type, a rotary type, or the like. Surface 36, opening surfaces 45 and 51, sealing material 32
(32a, 32b), and has a rotating shaft 35.
The peripheral surface 30 is a curved surface having an arc-shaped cross section, and a fan-shaped closing surface 36 is fixed to a side surface of the peripheral surface 30 facing the intake case 5. The intake door 10 is formed by a plurality of linear frames 46 and an arc-shaped frame 48 disposed along the peripheral surface 30 on the opposite side of the closing surface 36, and a surface adjacent to the peripheral surface 30. Among them, a surface opposite to the closing surface 36 is a fan-shaped opening surface 45.
The two surfaces parallel to the rotation shaft 35 are square opening surfaces 51.

At the ends of the linear frame 46 on the side of the peripheral surface 30 and on the side of the closing surface 36, a projecting portion 3 projecting outward is provided.
The outer seal member 32a is fixed to the outer surface of the overhang portion 31, and the inner seal member 32b is fixed to the inner surface. As shown in FIG. 5B, an arc-shaped sealing material 60 having a shape along the arc of the peripheral surface 30 is fixed to the outside of the arc-shaped frame 48. These seal members 32a, 32b, 60 are formed from an elastic material such as an elastomer or urethane. The sealing members 32 a and 32 b are provided in contact portions 27 and 2 formed inside the intake case 5 according to the position of the intake door 10.
8 and 29 (see FIG. 1), and the arc-shaped sealing material 6
Numeral 0 prevents air leakage by making contact with an arc-shaped contact portion 59 (see FIG. 3) facing the fan-shaped opening surface 45 and curved along the arc of the peripheral surface 30.

The rotating shaft 35 is connected to the side frame 46.
2 to 4, and a case-side bearing 61 formed directly on the intake case 5 and a rib 57 extending from the case of the intake case 5 or the blower unit 3, as shown in FIGS. It is rotatably held by a fan-side bearing 65 formed integrally. A case-side boss portion 49 is formed at a portion of the rotary shaft 35 that contacts the case-side bearing 61, and a fan-side boss portion 47 is formed at a portion that contacts the fan-side bearing 65.

In the first embodiment, as shown in FIGS. 6 and 7, the sliding means for sliding the intake door 10 along the longitudinal direction of the rotating shaft 35 is provided as the sliding means. A protrusion 70 is provided on the end face of the fan-side bearing 65.
In addition, two concave portions 71 and 72 are
Are formed.

The convex portion 70 and the concave portions 71 and 72 have a shape to be fitted to each other, and the end surface of the fan-side boss portion 47 in which the concave portions 71 and 72 are formed As a result, it slides while abutting on the convex portion 70. The position where the concave portions 71 and 72 are formed is determined by the position of the intake door 1.
This corresponds to a rotation range of zero. That is, when the protrusion 70 is fitted into one of the recesses (outside-side recess) 71, the intake door 10 is at a position that closes the outside air intake 6 and the protrusion 7
When 0 fits into the other concave portion (inside air side concave portion) 72,
The intake door 10 is at a position where the inside air intake 7 is closed. When the projection 70 is located at a portion 74 (hereinafter, referred to as a rotation intermediate portion) between the recesses 71 and 72, the intake door 10
Is in a position where neither the outside air intake 6 nor the inside air intake 7 is completely closed.

According to the sliding means having the above construction, when the rotation shaft 35 is rotated and the projection 70 is fitted into the outside air side recess 71, as shown in FIG. When the convex portion 70 is moved to the position PO for closing the inlet 6 and the convex portion 70 is fitted into the concave portion 72 on the inside air side, the intake door 10 is moved to the position PI for closing the internal air inlet, and the convex portion 70 is moved to the intermediate rotation portion. 74, the intake door 10
Moves to a position PM between the positions PO and PI.

Then, the intake door 10 is moved to the position P
When it is at O and PI, the protrusion 70 is
7, the intake door 10 is shifted toward the fan 26 side, and as shown in FIG. 8, the arc-shaped seal portion 60 disposed on the opening surface 45 side contacts the arc-shaped contact portion 59, Air leakage is prevented. On the other hand, intake door 10
Is located at the position PM, the convex portion 70 comes into contact with the rotation intermediate portion 74, the intake door 10 leans toward the case-side bearing 61, and the arc-shaped seal portion 60 comes into contact with the arc-shaped contact portion. It is separated from 59 by a distance d.

In FIG. 7, θ is the rotation angle of the intake door 10, and is 0 ° when the projection 70 is fitted into the outside air recess 71, and θmax is when it is fitted into the inside air recess 72. .
In this embodiment, the range is 0 <θmax <90. FIG. 9 shows the relationship between the rotation angle θ and the distance d. When θ = 0 or near θ = θmax, d = 0, and the seal portion 60 contacts the contact portion 59. On the other hand, when 0 <θ <θmax, that is, while the intake door 10 is moving, d = dmax, and the distance d becomes maximum.

As a result, while the intake door 10 is moving, the arc-shaped seal member 60 and the arc-shaped contact portion 59 do not come into contact with each other, so that the operating force of the intake door 10 can be reduced and the sealing force can be reduced. Since the wear of the material 60 can be reduced, the durability can be improved.

In order to allow the intake door 10 to slide toward the fan 26, an elastic body such as a spring may be arranged between the case 5 and the closing surface 36, for example.

Hereinafter, another embodiment of the present invention will be described. The same portions as those in the first embodiment and portions having the same functions and effects are denoted by the same reference numerals and the description thereof will be omitted. Omitted.

The vehicle air conditioner according to the second embodiment is provided with sliding means as shown in FIG.
The sliding means according to the second embodiment has a configuration in which the convex portion 70 is formed on the end surface of the case-side boss portion 49 and the concave rail portion 75 is formed on the end surface of the fan-side bearing 61.
And a convex rail portion 76 are formed.

The convex portion 70 moves while contacting the concave rail portion 75 and the convex rail portion 76 with the rotation of the rotary shaft 35. The concave rail portion 75 is formed by a distance corresponding to the rotation range of the intake door 10, and when the convex portion 70 reaches the convex rail portion 76 beyond one end 75a, the intake door 10 is When the outside air intake 6 is moved to the position for closing the outside air intake 6, that is, the position P0 in FIG. 8, and the convex portion 70 reaches the convex rail portion 76 beyond the other end 75b, the intake door 10 is moved to the inside air intake. It moves to the position where the inlet 7 is closed, that is, the position PI in FIG. When the convex portion 70 is in the concave rail portion 75, the intake door 10 is at an intermediate position in the rotation range, that is, at a position PM in FIG.

Then, the intake door 10 is moved to the position P
When at O and PI, the projection 70 fits into the concave rail 75 and the intake door 10 is
Therefore, as shown in FIG. 8, the arc-shaped seal portion 60 disposed on the opening surface 45 side comes into contact with the arc-shaped contact portion 59 to prevent air leakage. On the other hand, when the intake door 10 is at the position PM, the convex portion 70 comes into contact with the convex rail portion 76, so that the intake door 10 is shifted toward the case-side bearing 61 side. It is separated from the arc-shaped contact portion 59 by a distance d.

As described above, the sliding means in the second embodiment also prevents the arc-shaped seal portion 60 from contacting with the arc-shaped contact portion 59 while the intake door 10 is moving. The intake door 1
0 can be reduced and wear of the seal member 60 can be reduced, so that durability can be improved.

[0035]

As described above, according to the present invention, the operating force of the intake door can be reduced, and
Early deterioration of the sealing material can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view showing an internal structure of a vehicle air conditioner according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged front view of FIG. 1 showing an internal structure of an intake unit and a blower unit of the vehicle air conditioner according to the first embodiment, as viewed from a direction I.

FIG. 3 is a perspective view showing an appearance and an internal structure of an intake unit of the vehicle air conditioner according to the first embodiment.

FIG. 4 is a diagram showing a structure of an intake unit according to the embodiment of the present invention.

FIG. 5 (a) is a side view of the intake unit according to the embodiment of the present invention on the closed surface side, and FIG.
FIG. 5B is a side view of the fan-shaped opening surface side of the intake unit according to the embodiment of the present invention, and FIG.
FIG. 3 is a side view of the intake unit portion according to the embodiment of the present invention on the side of a square opening surface.

FIG. 6 is a diagram illustrating a structure of a sliding unit according to the first embodiment.

FIG. 7 is a diagram illustrating a positional relationship of a concave portion according to the first embodiment.

FIG. 8 is a diagram showing a rotation angle and a positional relationship of an intake door according to the embodiment of the present invention.

FIG. 9 is a graph showing a relationship between a rotation angle of the intake door and a gap between the arc-shaped sealing member and the arc-shaped contact portion in the embodiment of the present invention.

FIG. 10 is a diagram showing a structure of a sliding means according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Intake unit part 3 Blower unit part 4 Heat exchange unit part 5 Intake case 6 Outside air intake 7 Inside air intake 10 Intake door 13 Link mechanism 21 Evaporator 22 Heater 26 Fan 27, 28, 29 Contact Part 30 Peripheral surface 31 Overhanging surface 32 Seal part 35 Rotating shaft 36 Closing surface 40 Motor 41 Rotating shaft 45 Fan-shaped opening surface 46 Linear frame 47 Fan-side boss portion 48 Arc-shaped frame 49 Case-side boss portion 51 Square-shaped Opening surface 57 Rib 60 Arc-shaped sealing material 61 Case-side bearing 65 Fan-side bearing 70 Convex part 71, 72 Concave part 74 Rotating intermediate part 75 Concave rail part 76 Convex rail part d Gap PO Open air closed position PI Open air closed position PM times Moving intermediate position θ Rotation angle

Claims (4)

[Claims] A rotating shaft that is rotated by a predetermined driving source;
A vehicle air conditioner comprising: a peripheral surface having a cross section formed in an arc shape; and an intake door that selectively opens and closes the inside air intake and the outside air intake with the rotation of the rotation shaft. An air conditioner for a vehicle, comprising: a sliding means for sliding the intake door parallel to the rotation axis when the intake door is within a predetermined range of the rotation range. 2. The vehicle according to claim 1, wherein the predetermined range is a range where the intake door is in a position where neither the inside air intake nor the outside air intake is completely closed. Air conditioner. 3. A vehicle air conditioner according to claim 1, wherein said sliding means comprises a combination of said rotating shaft and a convex portion and a concave portion formed on a bearing of said rotating shaft. . 4. A fan for taking in air from the inside air intake or the outside air intake, a sealing material is arranged on a side of the intake door on the fan side, and the sliding means is configured such that the sealing material is The air conditioner for a vehicle according to any one of claims 1 to 3, wherein the intake door is slid so as to move to a side opposite to a fan.