JPH11280652A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the pressure resistance of a case by integrally forming a leg portion with the bottom plate. SOLUTION: The compressor has a case 10, a motor 11 shrink fit in the center portion of the case 10, a compressing element 12 fixed to the bottom portion of the case 10, and an accumulator 14 provided on the side wall of the case 10, and the like. This case 10 is formed from a cylinder portion 16, an upper plate 15 welded to that the upper end portion of the cylinder portion 16, and a bottom plate 20 welded to the lower end portion of the cylinder portion 16. At this time, a leg portion 21 is formed integrated with the bottom plate 20, thereby preventing distortion created during welding of the leg portion 21 to the separate bottom plate 20 and thus improving pressure resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a compressor in which the pressure resistance of a sealed case is improved.

[0002]

2. Description of the Related Art There are various types of compressors used in many technical fields today, such as a piston compressor, a scroll compressor, and a rotary compressor.

[0003] Among them, a general configuration of a scroll compressor and a rotary compressor is such that a compression element and an electric element for driving the compression element are housed in a cylindrical hermetic case, and the supplied refrigerant is compressed. It is a configuration for discharging.

FIG. 4 is a longitudinal sectional view of a rotary compressor. As described above, an electric element (motor) 11 is housed in a sealed case 10 and a rotary compression element 1
2 is stored, the supplied cold soot is compressed, and the case 10 is compressed.
Discharged inside.

The upper plate 15 of the case 10 has a discharge port 1
3 is provided, and the refrigerant discharged into the case 10 is discharged from the discharge port 13 to the outside of the machine.

At this time, since the compression process of the compression element 12 is a cycle process, pulsation occurs. Therefore, the supplied cold soot is supplied through the accumulator 14 to reduce the pulsation. The accumulator 14 is fixed to the case 10.

A plurality of legs 17 are welded to the bottom plate 16 of the case 10.

[0008]

However, the leg 1
When welding 7 to the bottom plate 16, at least the welded portion is locally heated so that the portion is annealed, so that the strength is deteriorated, or the welding causes an asymmetrical strain to reduce the pressure resistance of the case. There was a problem of deterioration.

Particularly, in the case of an HF-based refrigerant, the inside of the compressor has a high pressure, so that it is necessary to improve the pressure resistance in the case.

Accordingly, an object of the present invention is to provide a compressor in which the pressure resistance of the case is prevented from deteriorating.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a compressor including a compression element and an electric element for driving the compression element in a closed case. A cylindrical tube, an upper plate for closing the upper end of the tube, and a bottom plate for closing the lower end of the tube and integrally forming the legs are welded to the bottom plate. This prevents the occurrence of asymmetrical distortion and the deterioration of strength due to annealing.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a compressor according to the present invention, FIG. 2 is a top view of a bottom plate 20, and FIG.
FIG. 3B shows a cross-sectional view.

The compressor has a case 10, a motor 11 shrink-fitted at the center of the case 10, a compression element 12 fixed to a lower portion of the case 10, an accumulator 14 provided on a side wall of the case 10, and the like. ing.

The case 10 has a cylindrical tube portion 16.
Upper plate 1 provided with discharge port 13 at the upper end of cylindrical portion 16
5 is welded over the entire periphery of the end, and a bottom plate 20 provided with a leg 21 at the lower end of the cylindrical portion 16 is welded over the entire periphery of the end to form a closed case 10.

As described above, since the legs 21 are formed integrally with the bottom plate 20, it is not necessary to weld the legs 21 to the bottom plate 20, and the number of parts can be reduced.

Then, the refrigerant supplied through the accumulator 14 is supplied to the compression element 12, compressed, temporarily discharged into the case 10, and then discharged from the discharge port 13 to the outside of the machine.

At this time, as described above, since the leg portion 21 is formed integrally with the bottom plate 20, the leg portion 2 is formed as in the prior art.
This welding becomes unnecessary as compared with the case where 1 is separately welded to the bottom plate 20, and it is possible to prevent strength deterioration and distortion from occurring due to annealing that occurs at that time.

Therefore, the pressure resistance of the case 10 can be improved by that much, and the HFC which has a higher pressure than the conventional case can be used.
A suitable compressor can be obtained for a system refrigerant or the like.

The refrigerant used in the present invention is a refrigerant having no or little risk of destruction of the ozone layer, for example, 1,1,1,2-tetrafluoroethane (R134a)
Simple substance, mixed refrigerant of R134a, difluoromethane (R32) and pentafluoroethane (R125) (R407
C), a mixed refrigerant of R32 and R125 (R410A),
HF such as a refrigerant mixture (R404A) of R134a, R125 and 1,1,1-trifluoroethane (R143a)
There is a C-based refrigerant.

[0020]

As described above, according to the present invention,
Since the legs are formed integrally with the bottom plate, there is no need to weld the legs to the bottom plate. This reduces the number of parts and reduces the strength deterioration and distortion caused by welding, thereby reducing costs and improving the pressure resistance of the case. It becomes possible to do.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rotary compressor applied to an embodiment of the present invention.

FIG. 2 is a top view of a bottom plate.

FIG. 3 is a sectional view taken along a line AB in FIG. 2;

FIG. 4 is a longitudinal sectional view of a rotary compressor applied to the description of the conventional technique.

[Description of Signs] 10 Case 15 Top plate 16 Tube part 20 Bottom plate 21 Leg

Continuation of the front page (72) Inventor Masahiro Nakajima 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Keiko Nakamoto 2-5-5-1 Keihanhondori, Moriguchi-shi, Osaka No. Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A compressor comprising a compression element and an electric element for driving the compression element housed in a closed case, wherein the closed case closes a cylindrical tube and an upper end of the tube. And a bottom plate for closing a lower end of the cylindrical portion and integrally forming a leg portion.