JP4089425B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner capable of preventing wind leakage from the vicinity of a rotating shaft of a butterfly door that switches the wind of two air passages provided in an air conditioning case.
[0002]
[Prior art]
Conventionally, as an air conditioner for vehicles, an inlet for introducing wind from a blower is provided at the lower part of an air conditioning case, and a defroster outlet connected to a defroster in the passenger compartment is provided at the upper part, and air is directed toward the passenger's head. There is known an air conditioner having a structure in which a face blow-out port for blowing air is provided, an evaporator is disposed in the vicinity of the introduction port, and an air mix door and a heater core are disposed above the evaporator (for example, see Patent Document 1 below).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-32278
[Problems to be solved by the invention]
This type of vehicle air conditioner is usually formed with a defroster outlet and a face outlet adjacent to the upper part of the air conditioning case, and an independent defroster door and a face door are arranged at the defroster outlet and the face outlet, respectively. The defroster door and the face door are controlled to open and close according to the operation of the mode switch or the like.
[0005]
On the other hand, one butterfly door is provided inside the adjacent defroster outlet and face outlet, and the butterfly door is controlled to rotate, thereby opening the defroster outlet and closing the face outlet. On the other hand, a vehicle air conditioner that is operated to close the defroster outlet and open the face outlet has been developed.
[0006]
As shown in FIG. 4, the butterfly door 30 attached to the adjacent defroster outlet 28 and face outlet 29 is formed with door wings 32 and 33 so as to open on both sides of the axis 31, and the axis 31 is This structure is supported by the bearing portion 34 of the intermediate wall portion between the defroster outlet 28 and the face outlet 29. Then, by rotating the butterfly door 30, the defroster outlet 28 is opened and the face outlet 29 is closed, and conversely, the defroster outlet 28 is closed and the face outlet 29 is opened.
[0007]
However, in the case of a door that normally opens and closes a single outlet, a sealing material is attached around the door wing or around the outlet, and when the door wing is closed or abutted, the gap is sealed with the sealing material and the wind Leakage can be prevented. However, in the case of the butterfly door 30 as described above that opens and closes the two outlets so as to have an opposite opening / closing relationship, the gap between the upper surface of the door wing 33 of the opening outlet 29 and the partition wall and its axis It is difficult to seal the vicinity of 31, and there is a problem that the wind of the opening side outlet 29 tends to leak to the closing side outlet 28 through the gap around the shaft 31 as shown in FIG. 4.
[0008]
Furthermore, for example, when molding the shaft 31 integrally with the door wings 32, 33 with synthetic resin, to prevent the sink of the material during molding while securing the outer diameter of the shaft from the ease of assembly to the air conditioning case. The cross-sectional shape of the shaft 31 must be an irregular cross-section. For example, when the cross-sectional shape of the shaft 31 is an irregular cross-section such as a cross shape as shown in FIG. There was a problem that it was easy to leak into the outlet.
[0009]
The present invention solves the above-described problem, and provides a vehicle air conditioner that can prevent wind leakage of a butterfly door that opens and closes two adjacent air passages in an air conditioning case in opposite open / close states. The purpose is to provide.
[0010]
[Means for Solving the Problems]
To achieve the above object, a vehicle air conditioner of the present invention, two air passage downstream of the air conditioning case is provided adjacent the air stream passing through the one air passage upstream, downstream In a vehicle air conditioner in which a butterfly door that opens and closes the two air passages in the opposite open / close state is disposed so as to switch to the two air passages on the side, the rotation axis of the butterfly door is cylindrical It is formed partially as a part cylindrical shaft portion formed by cutting in the axial direction, the partition wall in the air conditioning case, the upstream portion and the downstream side of the partial cylindrical bearing section, with parts cut away, of a cylinder axially rotating shaft is formed divided into portions, the outer peripheral portion of the partially cylindrical shaft portion of the butterfly door is fitted in a partially cylindrical bearing section, partial cylindrical shaft portion is rotatably supported in contact without any gap in the downstream portion of the partially cylindrical bearing part It is characterized by that.
[0011]
Here, the butterfly door can be disposed inside the defroster outlet and the face outlet arranged adjacent to each other in the air conditioning case.
[0012]
[Action]
In the vehicle air conditioner configured as described above, the air introduced into the air conditioning case is cooled or heated by an internal heat exchanger, and depending on the operation of the mode switch, the defroster outlet, the face outlet, etc. The two outlets arranged adjacent to each other are opened and closed by the butterfly door in the opposite opening / closing relationship, and cooling or heating air is blown into the vehicle interior according to each mode.
[0013]
At this time, the butterfly door closes the defroster outlet with one door wing and opens the face outlet with the other door wing, or conversely opens the defroster outlet with one door wing. The wing is pivoted so as to close the face outlet, and the pivot shaft at that time is a partial cylindrical shaft portion that passes through the middle portion of the door wing on both sides. The partial cylindrical shaft portion is formed by cutting out a part of the cylinder in the axial direction, and is provided in the partition wall in the air conditioning case. Since the outer periphery of the partial cylindrical shaft that passes through the middle wing is fitted and pivotally supported, there is no gap near the shaft of the butterfly door, and air leaks from the open outlet to the closed outlet. Can be prevented.
[0014]
In addition, the partial cylindrical shaft portion provided in the butterfly door can secure the outer diameter necessary for its assembly, and the butterfly door and the partial cylindrical shaft portion are easily integrally formed with a synthetic resin using a simple molding die. And can be molded accurately without causing sinking of the material.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a partial cross-sectional view of an air conditioning case 1 of a vehicle air conditioner.
[0016]
An air inlet 2 is formed in the lower part of the air-conditioning case 1, and a suction part provided with a blower (not shown) communicates with the inlet 2 so as to suck in the inside air or outside air in the passenger compartment. Connected. Inside the introduction port 2 is disposed an evaporator 3 that passes the refrigerant and performs heat exchange between the refrigerant and the air flow to cool the air flow.
[0017]
A cold air passage 6 is formed in the upper portion of the evaporator 3 in the air conditioning case 1, an air mix door 5 is disposed in the upper portion of the cold air passage 6, and a heater core 4 is disposed obliquely above. A hot air passage 7 is provided in the upper part of the heater core 4, and the upstream side of the hot air passage 7 is connected to the downstream side of the cold air passage 6.
[0018]
The air mix door 5 is a door that adjusts the amount of air that passes through the heater core 4 and the amount of air that flows by bypassing the heater core 4 to adjust the temperature of the blown air that is blown into the passenger compartment. The angle is adjusted by a servo motor or the like. The heater core 4 is a heating heat exchanger having a tank and a large number of tubes, and heats the air by flowing cooling water (hot water) of the engine through the heater core 4.
[0019]
A defroster outlet 8 connected to the defroster in the passenger compartment and a face outlet 9 for blowing air toward the head of the occupant are provided above the air mix door 5 in the air conditioning case 1, that is, downstream. . Further, a foot side passage 19 is provided on the downstream side of the air mix door 5 via a foot door 17, and a foot outlet 18 for blowing out air toward the feet of the occupant at the end of the foot side passage 19. Is formed. The foot door 17 is formed as a fan-shaped rotary door, and operates to close the foot outlet 9 and switch the air to the foot outlet 18 when air is blown to the foot outlet 18.
[0020]
The defroster outlet 8 and the face outlet 9 provided in the upper part of the air-conditioning case 1 are provided with a butterfly door 10 as a defroster / face switching door so as to open and close them in opposite open / close states. As shown in FIG. 2, the butterfly door 10 is formed by protruding door wings 11 and 12 on both sides of a partial cylindrical shaft portion 13 that is a rotation shaft. That is, the partial cylindrical shaft part 13 is formed in the intermediate part of the door wings 11 and 12 on both sides.
[0021]
The shaft portion of the butterfly door 10 is formed as a partial cylindrical shaft portion 13 having a shape in which a cylinder is partially cut out in the axial direction, and a large plate shape for a face outlet at an upper right portion of the partial cylindrical shaft portion 13. And a small plate-like door wing 12 for a defroster outlet is protruded from the obliquely upper left portion of the partial cylindrical shaft portion 13.
[0022]
The door wings 11 and 12 and the partial cylindrical shaft portion 13 are integrally formed of synthetic resin. However, if the shaft portion is formed into a simple bar shape, sink marks of the material occur at the time of molding, and the dimensional accuracy is likely to deteriorate. However, by forming the partial cylindrical shaft portion 13 to be thin, it can be molded with high dimensional accuracy without causing sink marks during molding, and has a relatively simple structure without a movable core. It can be easily molded using
[0023]
On the other hand, a partition 15 that partitions the defroster outlet 8 and the face outlet 9 is formed in an upper portion of the air conditioning case 1, and a partial cylindrical bearing portion 14 is formed in the partition 15, and a partial cylindrical shaft portion 13 of the butterfly door 10. Are formed so as to be fitted and supported from the outer periphery.
[0024]
The partial cylindrical bearing portion 14 is divided into two parts, an upper part and a lower part, which form part of a cylindrical wall, and the partial cylindrical shaft part 13 of the butterfly door 10 is fitted between the upper and lower bearing parts. It is configured to be pivotally supported. As shown in FIG. 1, the butterfly door 10 is rotated to the left with the partial cylindrical shaft portion 13 as an axis to close the defroster outlet 8 and open the face outlet 9, and conversely as shown in FIG. When it is rotated to the right, the defroster outlet 8 is opened and the face outlet 9 is closed, so that it is mounted on the partial cylindrical bearing portion 14.
[0025]
The vehicle air conditioner configured as described above is mounted on the upper part of a blower unit provided with a blower (not shown), and when the blower is driven, the air sucked from the passenger compartment or outside air sucked by the blower is The air is blown into the air-conditioning case 1 from below and sent to the evaporator 3. Then, the air that has passed through the evaporator 3 is adjusted in accordance with the opening of the air mix door 5, the amount of air that does not pass through the heater core 4 and the amount of air that passes through the heater core 4, and passes through the air mix door 5 or the heater core 4. The air is mixed and blown to the upper outlet side.
[0026]
As shown in FIG. 1, the foot door 17 closes the foot side passage 19, the door wing 12 of the butterfly door 10 closes the defroster outlet 8, and the face outlet 9 opens in the face mode. The air blown to the air outlet side is sent from the face air outlet 9.
[0027]
At this time, the rotating shaft passing through the middle part of the door wings 11 and 12 on both sides of the butterfly door 10 is formed as a partial cylindrical shaft part 13 in which a part of the cylinder is cut out in the axial direction. Since the outer peripheral portion of the partial cylindrical shaft portion 13 passing through the middle portion of the door wing is fitted to and supported by the partial cylindrical bearing portion 14 provided in 15 with a part of the cylinder cut in the axial direction, the butterfly door There is no gap around the 10 axis. For this reason, the air leakage from the opened face blowing port 9 to the closed defroster blowing port 8 is prevented, and air is blown well only to the face blowing port 9.
[0028]
On the other hand, as shown in FIG. 3, when the butterfly door 10 is switched and the door wing 11 closes the face outlet 9 and opens the defroster outlet 8, the air blown to the upper outlet side is The air is blown from the defroster outlet 8. At this time, similarly to the above, the rotating shaft passing through the middle part of the door wings 11 and 12 on both sides of the butterfly door 10 is formed as a partial cylindrical shaft part 13 in which a part of the cylinder is notched in the axial direction. An outer peripheral portion of a partial cylindrical shaft portion 13 passing through the middle portion of the door wing is fitted to and supported by a partial cylindrical bearing portion 14 provided in the partition wall 15 in the case 1 and having a part of the cylinder cut out in the axial direction. Therefore, there is no gap near the axis of the butterfly door 10. For this reason, air leakage from the opened defroster outlet 8 side to the closed face outlet 9 is prevented, and only the defroster outlet 8 is blown well.
[0029]
In the above embodiment, an example in which the butterfly door is used as a door that opens and closes the defroster outlet and the face outlet arranged adjacent to each other in the air conditioning case has been described, but other air passages such as other outlets are used. The butterfly door having the above-described configuration can be used for opening and closing.
[0030]
【The invention's effect】
As described above, according to the vehicle air conditioner of the present invention, the rotating shaft passing through the middle part of the door wings on both sides of the butterfly door is a partial cylindrical shaft part in which a part of the cylinder is cut out in the axial direction. The outer peripheral part of the part cylindrical shaft part that passes through the middle part of the door wing is fitted to and supported by the part cylindrical bearing part that is formed on the partition wall in the air conditioning case and is partly cut out in the axial direction. With this structure, there is no gap near the butterfly door shaft, and it is possible to prevent wind leakage from the open outlet to the closed outlet. In addition, the partial cylindrical shaft provided on the butterfly door can secure the outer diameter necessary for its assembly, and the butterfly door and the partial cylindrical shaft can be made of synthetic resin by using a simple mold. It can be easily molded, and can be molded with high dimensional accuracy without causing sinking of the material.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view of a vehicle air conditioner showing an embodiment of the present invention.
FIG. 2 is a perspective view of a butterfly door.
FIG. 3 is a partial cross-sectional view of the upper portion of the air conditioning case 1;
FIG. 4 is a partial cross-sectional view of a conventional vehicle air conditioner.
[Explanation of symbols]
1-air conditioning case 5-air mix door 8-defroster outlet 9-face outlet 10-butterfly door 11, 12-door wing 13-part cylindrical shaft 14-part cylindrical bearing 15-partition

Claims (2)

Two air passages are provided adjacent to each other on the downstream side in the air conditioning case, and the two air passages are switched so that the air flows that have passed through the one air passage on the upstream side are switched to the two air passages on the downstream side . In a vehicle air conditioner in which a butterfly door that opens and closes an air passage in an opposite open / close state is provided,
Rotation shaft of the butterfly door is formed as a partial cylindrical shaft portion formed by cutting in the axial direction a portion of a cylinder, the partition wall in the air conditioning case, partial cylindrical bearing section, with parts cut away, of a cylinder in the axial direction Is formed separately into an upstream portion and a downstream portion of the rotation shaft , and an outer peripheral portion of the partial cylindrical shaft portion of the butterfly door is fitted into the partial cylindrical bearing portion, and the partial cylindrical shaft portion is the partial cylinder. An air conditioner for a vehicle, wherein the air conditioner is pivotally supported in contact with the downstream portion of the bearing portion without any gap . 2. The vehicle air conditioner according to claim 1, wherein the butterfly door is disposed inside a defroster outlet and a face outlet arranged adjacent to each other in the air conditioning case.

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