JPH10159726A - Soundproof box for vehicular motor-driven compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the prevention of the entry of water droplets or the like into a soundproof box by providing a top plate formed to cover the upper part of a motor- driven compressor body and to prevent the stagnation of water droplets, regarding a soundproof box enveloping a motor-driven compressor body. SOLUTION: A soundproof box 4 used for enveloping the body of a compressor 1 is formed out of a top plate 2 to cover the upper part of the body of the compressor 1 as well as a case plate 3 to cover the periphery and lower surface of the body of the compressor 1. Also, the body of the compressor 1 is held on the bottom of the case plate 3 via supports 7. In this case, the top plate 2 is formed to have a semi- circular shape. Thus, water droplets such as raindrops and dew, even when adhering to the upper surface of the top plate 2, can be discharged without any stagnation, thereby preventing the occurrence of corrosion or the ingress of the droplets into the soundproof box 4. Also, the soundproof box 4 may be formed to have penetration holes having larger diameters than an intake pipe 5 and a delivery pipe 6 at such a position as corresponding to the top plate 2, and O-rings are attached to ring grooves on the inner wall of the penetration holes, thereby preventing rainwater, condensed water or the like from entering the box 4 via the intake and delivery pipes 5 and 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof box for an electric compressor for air conditioning of an automobile.

[0002]

2. Description of the Related Art In recent years, in addition to an open-type compressor which transmits a rotational torque to a clutch through a belt and transmits a rotational torque to a clutch as a drive source, an electric compressor which uses an electric motor as a drive source has recently been developed. Widely known.

[0003] Compared with gasoline engines, the need for low noise and low vibration required for an air-conditioning electric compressor has become more severe due to the quietness of an electric motor which is a driving source for an electric vehicle. To improve quietness,
Examples of the soundproofing device for a compressor include a support for an automobile compressor disclosed in JP-A-6-323253, a soundproof box for an automobile compressor disclosed in JP-A-7-96736, and JP-A-8-61234.
Discloses a soundproofing device for an electric compressor.

FIG. 4 is a sectional view of a conventional compressor soundproof box. The compressor 1 has piping (supply pipe 5, discharge pipe 6, etc.) for supplying and discharging the refrigerant gas projecting upward.

[0005] The soundproof box 4 surrounds the compressor 1 main body by a flat top plate 2 covering the upper part of the compressor 1 main body and a case plate 3 covering the periphery and the lower surface of the compressor main body. Is fixed via a support 7 to the bottom surface of. An elastic member 8 for absorbing vibration is fixed to the upper surface of the flat plate 2 on the discharge pipe 6.

[0006]

However, since the soundproof box of the on-vehicle compressor is exposed to rain and dew, water drops easily accumulate on the flat top plate 2, and when used for a long period, the soundproof box 4 corrodes the flat top plate 2. And outer circumference of pipes 5 and 6 and elastic body 8
If there is a gap between the soundproof box 4 and the soundproof box 4, there is a possibility that water drops may enter the soundproof box 4, so that there is room for improvement.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and has as its object to provide a soundproof box of an electric compressor for vehicles which is resistant to corrosion and prevents water drops and the like from entering the soundproof box. Aim.

[0008]

Means for Solving the Problems To solve the above-mentioned problems, a sound-proof box for preventing detention of water droplets is formed by a top plate or a seal structure in which an O-ring is interposed between a compressor pipe and a wall of the sound-proof box. , Rainwater, etc. into the soundproof box.

[0009]

According to the first aspect of the present invention, a top plate of a soundproof box has a structure in which a flat portion and a concave portion are not formed. In addition, since water droplets do not stay on the top plate, the soundproof box is resistant to corrosion.

According to a second aspect of the present invention, in addition to the effect of the above-mentioned invention, the soundproof box can be made more compact by realizing the soundproof box to have a semicircular top plate. . In particular, in the case of a horizontal electric compressor, the top plate can be brought close to the shell cylindrical surface of the compressor, thereby realizing further compactness.

Further, according to the third aspect of the present invention, by interposing an O-ring between the pipe and the through hole in the wall of the soundproof box, it is possible to prevent moisture from entering the inside of the soundproof box and to ensure safety such as electric leakage. Can be more enhanced. In addition, the vibration noise of the pipe can be suppressed by the elastic O-ring.

[0012]

FIG. 1 is a sectional view of a soundproof box according to an embodiment of the present invention. The soundproof box 4 surrounding the main body of the compressor 1 is composed of a top plate 2 covering the upper part of the main body of the compressor 1 and a case plate 3 covering the periphery and the lower surface of the main body of the compressor 1. Is supported via a support. As shown in FIG. 1, since the shape of the top plate 2 for preventing the suppression of water droplets has no flat portion and no concave portion, specifically, a semicircular shape, water droplets such as rain dew adhere to the upper surface of the top plate 2. However, since the water is not collected on the upper surface of the top plate 2 and drained, corrosion and inflow into the box are prevented, and reliability can be secured. Further, the semicircular top plate can provide a space-saving effect of the soundproof box, thereby realizing miniaturization.

Next, as another embodiment of the present invention, FIG.
Fig. 2 shows a cross-sectional view of a main part of the soundproof box. Through holes 10 and 11 larger than the diameters of the suction pipe 5 and the discharge pipe 6 are provided at the position of the top plate 2 of the soundproof box 4 that comes into contact with the suction pipe 5 and the discharge pipe 6 that enter from the end face of the compressor 1.
Is formed. O-rings 8 and 9 are provided in ring grooves 12 and 13 formed on the inner wall surfaces of the through holes 10 and 11, respectively. With this configuration, it is possible to prevent rainwater, condensed water, and the like from traveling along the suction / discharge pipes 5 and 6 to enter the box 4, thereby improving safety such as electric leakage. Further, since the suction pipe 5 and the discharge pipe 6 are elastically supported by the O-rings 8 and 9,
It also has the effect of suppressing piping vibration.

[0014]

As is clear from the above embodiment, according to the first aspect of the present invention, the top plate of the soundproof box is shaped to prevent the retention of water droplets, so that water droplets stay on the top plate. Since this is eliminated, a soundproof box resistant to corrosion can be realized.

According to the second aspect of the present invention, the soundproof box has a semi-circular top plate shape, so that in addition to the effects of the above-described invention, the soundproof box can be further reduced in space and downsized. realizable.

According to the third aspect of the present invention, an O-ring is interposed between the pipe and the through hole in the wall of the soundproof box, thereby preventing moisture from entering the soundproof box and ensuring safety such as electric leakage. Enhance. Further, the vibration noise of the pipe can be suppressed by the elastic O-ring.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a soundproof box showing first and second embodiments of the present invention.

FIG. 2 is a partial cross-sectional view of a main part of a soundproof box showing a third embodiment of the present invention.

FIG. 3 is a cross-sectional view of a conventional compressor soundproof box.

[Explanation of symbols]

 Reference Signs List 1 electric compressor 2 top plate 3 case plate 4 soundproof box 5 suction pipe 6 discharge pipe 7 support 8 suction side O-ring 9 discharge side O-ring 10 suction side through hole 11 discharge side through hole 12 suction side ring groove 13 discharge side Ring groove

Claims (3)

[Claims] 1. A soundproof box covering the periphery of an electric compressor main body,
A soundproof box for an electric compressor for a vehicle, wherein a top plate is formed so as to cover an upper part of the electric compressor main body and to prevent water droplets from being retained. 2. The soundproof box of an electric compressor for a vehicle according to claim 1, wherein the top plate has a semicircular shape. 3. A soundproof box for an electric compressor for a vehicle, wherein an O-ring is interposed between a wall surface of the soundproof box covering the periphery of the electric compressor body and a pipe of the electric compressor.