JPS5819054Y2 - Housing structure of automotive air conditioning equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a housing structure for an automobile air conditioner such as an evaporator of a car cooler, and particularly to a sound insulation structure thereof.

For example, in the case of a passenger car, the evaporator inserted in the refrigeration cycle of a car cooler is installed on the engine compartment side of the dash panel (made of steel plate) that separates the engine compartment from the passenger compartment. Normal.

The evaporator itself is covered with a single steel plate housing along with a fan for blowing air, and at the same time, the inlet and outlet are opened into the vehicle interior through a duct, etc., and the air inside the vehicle is Heat is exchanged by passing the air through the evaporator, and the cooled air is returned to the vehicle interior.

By the way, as mentioned above, the evaporator is installed very close to the engine, and although the dash panel itself is soundproofed with an insulator dash, etc., the inside of the evaporator, which communicates with the passenger compartment, is located very close to the engine. It is separated from the engine room by only one piece of housing.

As a result, the noise and vibrations generated in the engine room are propagated into the vehicle interior through the evaporator, which may impede the comfort of the vehicle interior.

Therefore, as a means to prevent the propagation of noise and vibrations as described above, it is possible to attach sound absorbing material such as felt or urethane to the dash panel and the inner wall of the evaporator housing as in F1, but due to the characteristics of the evaporator, ,
Because the sound-absorbing material absorbs water droplets that occur during heat exchange,
Due to aging, the sound absorbing material deteriorates in function, such as rotting or emitting strange odors, making it undesirable in terms of maintenance and the like.Additionally, the work of applying the sound absorbing material is troublesome.

This idea was made against the background mentioned above.
A protrusion with a spacer function is formed on the outer circumferential surface of the inner housing that covers automotive air conditioning equipment such as an evaporator, and the entire inner housing is further covered with an outer housing to create a so-called double wall structure. We would like to provide a housing structure for automotive air conditioning equipment that suppresses the propagation of noise and vibration into the vehicle interior as much as possible by giving the air layer formed between housings a sound insulation effect. That is.

Hereinafter, embodiments of this invention will be described in detail using the drawings.

Figures 1 and 2 show the overall structure of an evaporator unit in a car cooler to which the present invention is applied, and this evaporator unit 1 includes an evaporator body 2 that controls heat exchange, an inner housing 3 that encloses the evaporator body 2, and an inner housing 3 that encloses the evaporator body 2. It is composed of an outer housing 4 and is fixed to a dash panel 5 that partitions the vehicle interior and the engine room by means of mounting fittings (not shown) or the like.

The inner housing 3 is made of a shape-retaining soft plastic molded body such as vinyl chloride, and has a substantially rectangular shape, and is divided into upper and lower halves from the center, and has an integrally fitted structure.

The evaporator main body 2 and the fan 6 for blowing air are housed inside, and the air inside the vehicle is sucked in from the suction lower formed on the side of the evaporator main body 2.
After exchanging heat, the air is blown into the vehicle interior through the air outlet 8.

In addition, a plurality of ribs 9, 9... are integrally provided on the entire outer circumferential surface of the inner housing 3 on all four circumferences, top and bottom, and each rib 9 has a large number of ribs as shown in FIGS. 3 and 4. Pin-shaped protrusions 10, 10, .

The outer housing 4 is formed into a similar shape to the inner housing 3 by drawing a steel plate, and is divided into upper and lower parts from the center like the inner housing 3, and has a flange portion 4a.

4a is integrated by spot welding or screwing, and covers the entire circumference of the inner housing 3 except for the suction lower and the outlet 8, and the inner housing 3 and the outer housing 4 are tightly fitted. Therefore, the tips of the protrusions 10, 10... are in pressure contact with the inner wall of the outer housing, and both housings 3, 4
A certain air layer 11 is formed between them (FIG. 1).

Here, the inner housing 3 against the inner wall of the outer housing 4
The reason why the contact is made as a point contact by the projections 10, 10, . . . is to prevent the propagation of vibrations by minimizing the relative contact area between the inner housing 3 and the outer housing 4.

With the above configuration, the noise and
The vibration hits the outer housing 4 and is partially blocked and damped.

The sound transmitted through the outer housing 4 is repeatedly reflected between the inner wall of the outer housing 4 and the outer wall of the inner housing 3 with an air layer 11 in between, and is attenuated, and is further blocked by the inner housing 3.

Therefore, as a result of the evaporator unit 1 having a sound insulating effect by itself, the noise and vibrations propagated into the vehicle interior through the suction lower or the air outlet 8 are significantly suppressed, and the fear that the comfort inside the vehicle interior will be hindered is eliminated.

5 and 6 show other embodiments of this invention, that is, other aspects of the rib 9. The rib 9 shown in FIG. 5 is formed into a knife shape, and the one shown in FIG. This embodiment differs from the first embodiment in that the ribs 9 are formed in a so-called serrated shape, and the ribs 9 and protrusions 10 are completely shared in both embodiments.

In addition to the effects of the first embodiment, this embodiment has the advantage of excellent moldability.In particular, the one shown in FIG. 5 has the advantage that the contact area with the outer housing 4 is extremely small. be.

In addition, in all of the above embodiments, soft resin such as vinyl chloride is used as the material for the housing, which is difficult to propagate vibrations to. In other words, the sound insulation performance can be further improved.

As is clear from the above explanation, in the housing structure of the automotive air conditioner according to this invention, the housing that encases the main body of the device has a double wall structure, with an inner housing and an outer housing. Since this device has a sound insulation effect as a single device by forming an air layer between the two, it has a remarkable sound insulation effect compared to conventional structures, and the level of noise and vibration transmitted into the vehicle interior is significantly reduced. In addition, since sound-absorbing materials such as felt or urethane are not required, there is no functional deterioration such as rotting or generation of strange odors, and maintenance is also easy.

In addition, since the gap between the inner housing and the outer housing is maintained by the projection integrally molded on the inner housing side, the relative contact area between the two housings is small, and there is no risk of abnormal noises such as chatter. The vibration propagation rate is also suppressed.

In addition, since the inner housing is made of a resin molded body, it has good moldability and shape retention, and there is no functional deterioration due to aging, so as a result, we can provide air conditioning equipment that is inexpensive and has a long life. There is an effect.

It should be noted that the present invention is of course applicable not only to the car cooler but also to heater units, ventilation floors, and the like.

[Brief explanation of the drawings] Fig. 1 is an exploded perspective view showing the structure of an evaporator unit for a car cooler as an example of this invention, Fig. 2 is a full sectional view of the same, and Fig. 3 shows the inner and outer housings. FIG. 4 is an enlarged perspective view showing the structure of the ribs and protrusions, and FIGS. 5 and 6 are enlarged views showing other aspects of the rib shape as other embodiments of this invention. FIG. 1... Evaporator unit, 2...
・Air forator body, 3...inner housing,
4... Outer mounting, 5... Dash panel, 9... Rib, 10... Protrusion, 11... Air layer.

Claims (1)

[Scope of utility model registration request] A housing structure for an automotive air conditioner that is installed outside the vehicle interior and connected to an air intake or air outlet inside the vehicle, and the outer periphery of an inner housing made of a resin molded body that encloses the air conditioner. In addition to forming a protrusion that functions as a spacer on the surface, the entire inner housing is further covered with an outer housing, and an air layer is formed between the inner housing and the outer housing to provide a special sound insulation effect. A housing structure for automotive air conditioning equipment characterized by: