JPH01311911A - Changeover door of air conditioner for motor vehicle - Google Patents

Abstract

PURPOSE:To prevent noise generation by forming a rugged surface lining at least one one surface of a base plate for a door body. CONSTITUTION:A changeover door 1 of the inside and outside air consists of a base plate 9 of synthetic resin for a door body directly coupled with a rotationally movable shaft 8 and linings 10 on both sides of it. The lining 10 is made of soft polyurethane foam or urethane foam, and rugged parts 12 are formed on the surface. Degree of ruggedness is as large as near to the center part 12A, meanwhile the degree of ruggedness is a little smaller at the end part 12B. In such construction, when the end edge part 12B of the door 1 abuts on an end edge part 6 of the outside air intake side or an edge part 7 of the inside air intake side, at first top points of the projected part of the end part 12B contact on the edge part of air intake and then shift to surface contact as the door moves rotationally. Consequently noise generation such as a shock sound can be restrained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a switching door for an air conditioner for an automobile, and in particular to an automobile that can more effectively prevent the generation of noise when switching the door. This invention relates to a switching door for an air conditioner.

[Prior Art] Conventionally, various types of switching doors have been used in automotive air conditioners to control the flow of conditioned air, such as by switching air conditioning modes and adjusting the air mix ratio. When these switching doors are switched, the impact sound caused by the contact between the seat part of the switching door and the edge of the ventilation opening is transmitted directly into the vehicle interior, or the vibration noise is propagated into the passenger compartment via the rotating shaft and other structural parts. The problem is that you end up doing it.

In order to solve the problem of noise generation, for example,
A device such as No. 13 is publicly known. In the former idea, a recess is formed in the substrate, and a heat absorbing member is provided on the substrate so as to form a sealed space between the recess and the recess. Moreover, in the latter idea, ribs are formed in the door body to form an intermediate space.

In these conventional designs, the seat portion of the switching door is made of soft urethane foam or foamed urethane, but in either case, the seat portion of the switching door is flat, and there are limits to the prevention of noise generation. It was something.

[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to effectively absorb and attenuate the above-mentioned impact noise and vibration noise when driving the switching door to open and close. An object of the present invention is to provide a switching door for an automobile air conditioner that can be used in an automobile.

[Means for Solving the Problems] That is, the present invention provides a switching door that rotates around a rotating wheel so as to switch the flow of conditioned air in an air conditioner for an automobile, which comprises a door body substrate and this door. A lining having an uneven surface formed on at least one side of a main body substrate, and at least the seat portion of the switching door has an uneven surface to reduce the generation of impact noise as much as possible. This is a switching door for an air conditioner.

[Function] In the switching door of the automobile air conditioner according to the present invention, the surface is covered with a lining having an uneven shape, so that the ventilation of the seat portion located at the end of the door and the air conditioner is particularly reduced. When it comes into contact with the edge of the ventilation opening, the apex of the convex part of this lining first comes into point contact with the edge of the ventilation opening, and as the switching door rotates, it gradually becomes a surface contact. Compared to the impact sound generated by surface contact, the noise can be reduced from the stage of its generation. Furthermore, the impact sound caused by the contact can be effectively absorbed by the uneven lining.

Furthermore, by providing the above-mentioned uneven lining in the center of the door body substrate, the sound-absorbing surface area will be increased and the absorption efficiency of impact and vibration sounds will be improved. It is possible to prevent noise more efficiently than the conventional method.

[Embodiment] Next, an example in which an embodiment of the present invention is applied to an inside/outside air switching door will be described based on FIGS. 1 to 4.

FIG. 1 is a sectional view of a main part of an inside/outside air intake box 2 equipped with an inside/outside air switching door l, and this inside/outside air intake box 2 has an inside air intake 3, an outside air intake 4, and an intake passage 5. are doing. The inside air intake port 3 and the outside air intake port 4 have an inside air intake side edge 6 and an outside air intake side edge 7 as ventilation opening edges that come into contact when the inside/outside air switching door 1 is opened and closed, respectively.

As shown in FIGS. 1 and 2, the inside/outside air switching door l is connected to a rotating shaft 8 for opening/closing drive, and is made of synthetic resin and is directly connected to this rotating shaft 8. The door body substrate 9 has a door body substrate 9 and linings 10 provided on both sides of the door body substrate 9. The door body substrate 9 has a through hole 11 formed in a part thereof, and this through hole 11
The front and back linings 10 can be connected through the linings 10 to improve strength and productivity.

The material of the lining 10 is soft urethane foam, foamed urethane, or any other sound absorbing material, as in the case of conventional switching doors.

Further, the lying member 10 has an uneven portion 12 formed on its surface, and the uneven portion 12 increases its surface area.

As shown in Fig. 3, when manufacturing this internal/external air switching door l, the internal/external air switching door l is
Place the door main board 9.

A predetermined foam material is injected into the interior from a foam material injection port 15. Incidentally, it is assumed that an uneven mold part 16 for forming the uneven part 12 is formed on the inner surface of the upper and lower molds 13 and 14.

In addition, in FIG. 1, the reference numeral 17 indicates a fan for blowing air.

Further, as shown in an enlarged view in FIG. 4, the unevenness 12 of the inside/outside air switching door 1 has a large degree of unevenness at its center 12A, while the degree of unevenness is slightly smaller at its edge portions 12B. It is formed. That is, when the seat portion, that is, the edge portion 12B of the inside/outside air switching door 1 comes into contact with the inside air intake side ends t & 6 or the outside air intake side ends 1 & 7, the edge portion 12B is brought into point contact from the apex of the convex portion. As the inside/outside air switching door 1 rotates, it is gradually compressed and gradually comes into surface contact. Therefore, unlike the conventional case where the switching door makes surface contact with the edge of the ventilation opening from the beginning.

It is possible to reduce the noise level from the beginning of the impact sound.

In addition, since the center L2A portion has a larger surface area or sound wave absorption volume than the edge portion 12B, it has good sound absorption properties, and not only the above-mentioned impact sound but also indirect damage caused by propagation of this impact sound to adjacent parts. It also absorbs vibrational sounds more effectively.

In addition, the degree of unevenness of the edge portion 12B is the same as that of the center portion 12A.
Since it is formed slightly smaller than that of , the inside/outside air switching door 1 can be rotated around the rotation shaft 8 with the minimum necessary driving force. That is, the uneven portion 1
2 is uniformly formed on the surface of the inside/outside air switching door 1, it becomes impossible to maintain the rotation angle for opening/closing the inside/outside air switching door 1 within a necessary and sufficient range, and a larger driving force is also required for its operation. becomes. Furthermore, the uneven portion 12
However, the portion protrudes into the passage of the inside and outside air intake box 2 more than necessary, leading to an increase in passage resistance or a decrease in the required air volume.

These problems can be avoided by making the edge portion 12B less uneven than the center portion 12A as described above.

In addition, in the present invention, the shape and degree of the above-mentioned uneven portion 12 are arbitrary, and the applicable switching door is not limited to an inside/outside air switching door.

It can also be applied to mode switching doors, etc.

Furthermore, the uneven lining may be formed only on one surface of the door body substrate.

In particular, the edge portion 12B abuts the outside air intake side edge 7,
When the inside air intake port 3 side is opened, the impact noise generated is likely to propagate from the inside air intake port 3 into the vehicle interior. If formed, the noise caused by such impact sound can be effectively reduced.

Further, in the above-described embodiment, an example was shown in which the lining lO was integrally formed on the door body substrate 9 using the upper and lower molds 13 and 14, but it may be configured so that a lining of a predetermined shape is attached.

[Effects of the Invention] As explained above, according to the present invention, since the lining provided on the door body substrate itself has an uneven portion formed on its surface so as to have sound absorbing properties, there is no impact noise or noise when the switching door is driven. It is possible to reduce vibration noise.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts of an inside/outside air intake box 2 equipped with a switching door l according to an embodiment of the present invention, FIG. 2 is a perspective view of the inside/outside air switching door l, and FIG. 3 is a perspective view of the inside/outside air switching door l. FIG. 4 is a sectional view of the upper and lower molds 13 and 14 for manufacturing, and an enlarged view of the main parts when the inside/outside air switching door l is opened and closed. 1. Inside/outside air switching door 2. Inside/outside air intake box 3. Inside air intake 4. Outside air intake 5. Intake passage 6. , inside air intake side edge 7 , outside air intake side edge 8 , rotation shaft 9 for opening/closing drive, , door body substrate 10 , lining 11 , Through hole 12, Uneven part 12A, Center part 12B, Edge part 13, Upper mold 14, Lower mold 15, , , Foaming material injection port 16 , , Concave-convex mold portion 17 for forming the concave-convex portion 12 ,
,, Fan patent applicant for air blowing Diesel Equipment Co., Ltd.

Claims (1)

[Scope of Claims] A switching door that rotates around a rotation axis to switch the flow of conditioned air in an automotive air conditioner, comprising: a door body substrate; and at least one side of the door body substrate. A switching door for an air conditioner for an automobile, comprising: a lining having an uneven surface.