JPS6146003Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a door mounting structure for an automobile air conditioner, and particularly relates to improving the sealing performance at the pivot end of the door.

An example of an air conditioner for an automobile is shown in FIG. It has a built-in fan 6. Air flowing in from the inside air inlet 2, the outside air inlet 3, or both is discharged from the intake unit 1 by the fan 6 and sent into the cooler unit 7. An evaporator 8, which is a component of the cooling circuit and circulates refrigerant, is installed inside the cooler unit 7, and is connected from the intake unit 1 to the cooler unit 7.
The air that enters the room is cooled here. The air leaving the cooler unit 7 is sent to the heater unit 10 which has a heater core 9 through which engine cooling water is passed and is heated. Air is discharged. The temperature of the air into the vehicle interior is controlled by adjusting the amount of air passing through the heater core 9 by opening and closing the mixer door 11.

In such a car air conditioner,
Although many air control doors are used, the mix door is rotatably mounted with a structure as shown in FIG. 2. That is, a rotation shaft 12 is fixed to one end of the mixture door 11,
This rotating shaft 12 is mounted between both side walls of the heater unit 1, and both ends thereof are rotatably supported by the both side walls. A heater core 9 is provided on the outer periphery of the rotating end of the mixer door 11 in the heater unit 10.
One end of a partition wall 14 for separating the air passage 13 detouring from the heater core 9 is disposed close to the heater core 9.
A seal portion 15 having a substantially semi-cylindrical shape is formed at one end of the partition wall 14 . This seal part 15
In order to maintain a seal between the outer periphery of the rotating end of the mix door 11 and the partition wall 14 while suppressing the opening/closing force of the mix door 11 to make the operation smooth, the inner circumferential surface of the seal portion 15 and the outer circumferential surface of the mix door are A predetermined clearance C is provided between the two.

However, in such a conventional mix door mounting structure, a clearance is provided between the seal portion and the outer peripheral surface of the mix door rotating end, so that the air distributed to the detour air path side by the mix door is There was a problem in that the air escaped to the heater core side through this clearance, making the adjustment of the amount of air passing through the heater core inaccurate.

Another problem with the intake door 4 is that even when the inside air inlet 2 is opened to introduce inside air, outside air enters from the outside air intake 3 side, making it difficult to achieve good air conditioning. Other doors also had problems with poor sealing, preventing proper air conditioning. The present invention was developed to solve these conventional problems, and improves the sealing performance between the sealing part and the outer circumferential surface of the door's rotating end while maintaining smoothness in the rotating movement of the door. The purpose is to provide a door mounting structure that can be used.

Embodiments of the present invention will be described below with reference to the drawings, assuming that they are used in a mixer door.

FIG. 3 is a diagram showing one embodiment of the present invention. First, the configuration will be explained. This mix door 11
is fixed on the outer periphery of the rotating shaft 12 by rounding one end side of a flat plate-shaped core material 11a, and a coating made of a relatively weakly elastic material such as urethane is applied to the outer surface of the core material 11a. One side or a portion of one side is folded back and the whole is covered with the member 11b. A protrusion 16 is integrally molded on the inner circumferential surface of the seal portion 15 of the partition wall 14 that faces the outer circumferential surface of the rotating end of the mixer door 11 with a predetermined clearance C so as to extend substantially parallel to the rotating shaft 12. The protruding portion 16 protrudes approximately toward the center of the rotating shaft 12 so as to be in constant contact with the outer peripheral portion of the rotating end of the covering member 11b with the flesh wall of the covering member recessed. has been done.

Next, the effects will be explained.

The wind that is distributed to the detour air path side by the mixture door 11 and enters the gap defined by the clearance C comes into contact with the protruding part 16 in a recessed state and blocks the gap, so that the air can reach the heater core. Therefore, the sealing state between the detour air passage and the heater core in this clearance is completely ensured. In addition,
Escape from the heater core 9 side to the detour air path side is also prevented in the same way.

In this completely sealed state, the opening/closing operation of the mixer door 11 is ensured by continuously changing the concave deformation point of the covering member 11b facing the protrusion 16 due to its elasticity as the mixer door rotates. . In this case, since the covering member 11b is continuously and smoothly displaced, the mix door can be opened and closed extremely smoothly. In addition, the operating force required to open and close the mix door is much greater than that in the case where the inner circumferential surface of the seal portion 15 is brought into sliding contact with the outer circumferential surface of the rotating end of the mix door without providing the clearance C to ensure a complete sealing state. It can be kept small.

By the way, a heater unit is usually formed by splitting it into two parts vertically and then joining them together to form a single piece. However, when the protruding part is molded together with the heater unit, there is a risk that a gap will occur at the joint. In such a case, as shown in FIG. 4, if the protrusions 16 are formed on concave and convex bodies 16a and 16b that are shifted from the parting line and engage with each other at the joint location, the risk of creating a gap can be avoided.

In the above embodiment, the case where the protrusion is provided approximately at the center of the inner circumferential surface of the seal portion has been described, but the protrusion portion may be provided near the edge of the inner circumferential surface of the seal portion, or may be provided in a plurality of strips. Further, the cross-sectional shape of the protrusion is not limited to a semicircular shape, and may be any shape. The covering member may be provided at least in the contact range with the protrusion.

As explained above, according to the present invention, a protrusion is provided on the inner circumferential surface of the sealing member, and the protrusion is immersed in the covering member made of an elastic body covering the outer periphery of the rotating end of the door. Since the gap between the rice plates is blocked, it is possible to improve the sealing performance between the seal portion and the outer circumferential surface of the door rotation end while maintaining the smoothness of the door rotation operation. In particular, when used in places such as mix doors that require perfect sealing, air conditioning can be achieved more appropriately.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing a general automotive air conditioner, Fig. 2 is a sectional view showing a conventional example, Fig. 3 is a sectional view showing an embodiment of the present invention, and Fig. 4 is a diagram showing a protrusion. It is a partial perspective view which shows an example of an aspect. 9... Heater core, 10... Heater unit,
11...mix door, 11a...core material, 11b
... Covering member, 12 ... Rotating shaft, 13 ... Detour air path, 14 ... Partition wall, 15 ... Seal part, 16 ...
protrusion.

Claims (1)

[Scope of utility model registration request] The door installed inside the automobile air conditioner,
In this door mounting structure in which one end of the door is rotatably supported in close proximity to a partition wall of an automobile air conditioner, at least the outer periphery of the rotating end of the door is covered with a covering member made of an elastic material. . Attaching a door to an air conditioner for an automobile, characterized in that a protruding portion that contacts the covering member in a recessed state is formed in a portion of the partition wall facing the covering member so as to extend in the axial direction. structure.