JP2980259B2 - Hermetic electric compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic electric compressor used in refrigerators and the like, and more particularly to a low noise compressor.

[0002]

2. Description of the Related Art In recent years, hermetic electric compressors (hereinafter referred to as compressors) are required to have low vibration and noise. Hereinafter, an example of a conventional compressor will be described with reference to the drawings. FIG. 4 is a side cross-sectional view of the compressor disclosed in Japanese Patent Publication No. 1-47632.

In a closed container 1, a compression element 2 and an electric element 3
And a combined body 4 in which are integrated with each other. The compression element 2 is composed of a cylinder 5, a piston 6 reciprocating in the cylinder, a crankshaft 7 rotating integrally with the rotor 3a of the electric element 3, and a con-lot 8 converting rotation to reciprocation by rotation of the crankshaft. I'm wearing

[0004] Reference numeral 10 denotes a tube welded to the closed container 1. Numeral 11 is a leg whose bottom surface is formed into a flat surface and which is welded to the flat surface. Also, on the side of the closed container 1,
A stay 12 is attached by welding to a curved surface 1b formed when the plate is wound around a bar.

Reference numeral 13 denotes a hermetic terminal which is hermetically welded to the closed casing 1 and guides electric power to the electric element 3.
The leg 11 is attached to the flat part by welding, so that workability is good. Further, the stay 12 is attached to the curved surface on the side surface of the closed container 1 by welding, and since the stay 12 is not spherical, workability is good.

[0006]

However, in the above configuration, both the flat portion and the curved portion formed when the plate is wound on a rod have a low rigidity of the closed container, so that the closed container is slightly vibrated. Noise is generated, and the operating noise of the internal coupling body leaks from the flat portion and the curved surface portion, thereby causing a problem that the noise is loud.

The present invention has been made in view of the above problems, and provides a compressor with low noise.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a compressor according to the present invention comprises a hermetically sealed container having a spherical surface, a combined body in which a compression element and an electric element are integrally combined. A supporting device for elastically supporting the combined body in the closed container, and a leg fixedly welded to a bottom surface of the spherical surface of the closed container. The above-mentioned legs are welded.

Further, the shape of the bottom surface of the closed container is constituted by two or three spherical surfaces r having different radii.

[0010] Further, a closed container having a spherical surface formed thereon, a combined body in which a compression element and an electric element are integrally combined, a supporting device for elastically supporting the combined body in the closed vessel, A stay of the support device is welded and fixed to a side surface of the container, and a stay of the support device formed into substantially the same spherical surface is welded to a side surface of the spherical surface of the closed container.

[0011] Further, the bottom surface of the snub bar formed into substantially the same spherical surface is welded to the corner at the bottom of the spherical surface of the sealed container.

[0012]

According to the present invention, the rigidity is increased by eliminating the flat portion and the curved surface portion and forming a ball-like spherical shape by the above-described structure. In addition, since it is reinforced with legs, stays or snub bars, the rigidity is further increased, so that noise is greatly reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A compressor according to one embodiment of the present invention will be described with reference to the drawings. The same parts as those in the conventional example will be described using the same reference numerals, and the same components and operations will be omitted.

In FIG. 1 to FIG. 5, a combined body 24 in which a compression element 22 and an electric element 23 are integrally combined in a closed vessel 21 having a spherical surface formed therein,
1 comprises a supporting device 25 for elastically supporting the inside of the container 1 and legs 26 fixed to the spherical bottom surfaces 21a and 21b of the closed casing 21 by welding.

The spherical bottom surfaces 21a, 21b of the sealed container 21
Are welded with legs 26 formed into substantially the same spherical surface.

The shape of the bottom surfaces 21a and 21b of the closed container 21 is constituted by two or three spherical surfaces r having different radii, ie, r1 and r2.

The closed container comprises a supporting device 25 for elastically supporting the combined body 24 in the closed container 21 and a stay 27 of the supporting device welded and fixed to the spherical side surface 21c of the closed container. The stay 27 of the support device, which is formed to have substantially the same spherical surface, is welded to the side surface 21c of the spherical surface.

In FIGS. 4 and 5, the bottom corner 21 of the closed container is shown.
With the snub bar 28 of the support device welded and fixed to d, the bottom surface of the snub bar formed into substantially the same spherical surface is welded to the bottom corner of the spherical surface of the sealed container. FIG. 5 shows a state immediately before the snub bar 28 is welded by projection. Reference numeral 28a denotes a welding projection of the snub bar 28, reference numeral 29 denotes a welding jig, and a tip 29a is inserted into a hole 28b of the snub bar to fix the snub bar. 30
Is under the welding jig. In addition, this welding may be performed by providing a hole in a closed container, and by fitting the projection 28a of the snub bar to the hole to make an air-tight welding by arc welding.

If there is a flat surface in the closed container, the sound source of 2 to 3 kHz which the combined body 24 has resonates and expands in the flat portion. On the other hand, if the airtight container has a spherical shape without a flat portion, the vibration frequency is around 4 kHz and does not resonate with the above 2-3 kHz, so that the compressor is silent.

According to the modal analysis test of the inventor, the entrance radius R1 which is half of the entrance diameter of the closed container is set to 100.
The spherical surface R2 of the side surface is within 100%, the spherical surface r1 of the bottom surface is within 120%, and the horizontal spherical surface r2 of the bottom surface is 35%.
%, The rigidity of the closed container was the strongest.

In the above-mentioned configuration, the rigidity is increased and the noise is greatly reduced by eliminating the flat portion and the curved portion to form a sphere. According to the compressor noise test results, the conventional 60 dB (A) is 53 d in the present invention.
B (A).

[0022]

As described above, the present invention provides an airtight container having a spherical surface formed therein, a combined body in which a compression element and an electric element are integrally combined, and an elastically resiliently mounting the combined body in the closed vessel. It comprises a supporting device for supporting and a leg welded and fixed to the bottom surface of the closed container, and the leg formed into a spherical surface substantially the same as the bottom surface of the spherical surface of the closed container is welded.

A closed container having a spherical surface, a combined body in which a compression element and an electric element are integrally combined, a supporting device for elastically supporting the combined body in the closed vessel, A stay of the support device is welded and fixed to a side surface of the spherical surface, and a stay of the support device formed into substantially the same spherical surface is welded to the side surface of the spherical surface of the closed container.

Alternatively, a snub bar of a supporting device is fixed to the bottom corner of the sealed container by welding, and the bottom surface of the snub bar formed into a substantially same spherical surface is welded to the bottom corner of the spherical surface of the sealed container.

The compressor comprises a combined body in which a compression element and an electric element are integrally combined in a closed container formed into a spherical shape, and a supporting device for elastically supporting the combined body in the closed container. Inlet radius R which is half of the inlet diameter of the closed vessel
When the ratio of 1 is set to 100, the side surface spherical surface R2 is within 100% and the bottom surface spherical surface r1 is within 120%, so that the rigidity of the sealed container is increased, so that the compressor noise can be greatly reduced. .

By omitting the flat and curved portions to form a sphere, the rigidity is increased and the noise is greatly reduced. Therefore, it is possible to provide a quiet compressor with low noise during operation.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a compressor according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the compressor taken along line III-III in FIG.

FIG. 3 is a side sectional view of a compressor according to another embodiment of the present invention.

FIG. 4 is a sectional view of a compressor according to another embodiment of the present invention.

FIG. 5 is a detailed view of FIG. 4;

FIG. 6 is a side sectional view of a conventional compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Closed container 21a, 21b Bottom surface 21c Spherical side surface 21d Bottom corner 22 Compression element 23 Electric element 24 Combined body 25 Supporting device 26 Leg 27 Stay 28 Snubber 28a Projection 29 On welding jig 29a Tip 30 Below welding jig R1 Inlet radius R2 spherical surface on the side r1 spherical surface on the bottom surface r2 horizontal spherical surface on the bottom surface

Claims (6)

(57) [Claims] 1. A closed container having a spherical surface, a combined body in which a compression element and an electric element are integrally combined, a support device for elastically supporting the combined body in the closed container, A hermetic electric compressor comprising legs fixedly welded to a bottom surface of a container, and legs formed into a spherical surface substantially the same as the spherical surface of the hermetically sealed container. 2. The hermetic electric compressor according to claim 1, wherein the shape of the bottom surface of the hermetic container is constituted by two or three spherical surfaces r having different radii. 3. A closed container having a spherical surface, a combined body in which a compression element and an electric element are integrally combined, a supporting device for elastically supporting the combined body in the closed container, A hermetic electric compressor comprising: a stay of the support device welded and fixed to a side surface of a container; and a stay formed into substantially the same spherical surface is welded to a spherical side surface of the closed container. 4. A closed container having a spherical surface, a combined body in which a compression element and an electric element are integrally combined, a supporting device for elastically supporting the combined body in the closed container, and A snubber of the support device welded and fixed to a bottom corner of the container, and a spherical bottom corner of the closed container,
A hermetic electric compressor characterized by welding the bottom surface of a snub bar formed into substantially the same spherical surface. 5. A closed container formed with a spherical surface, a combined body in which a compression element and an electric element are integrally combined, and a supporting device for elastically supporting the combined body in the closed container, Inlet radius R which is half of the inlet diameter of the closed vessel
A hermetic electric compressor characterized in that the ratio of 1 to 100 is such that the spherical surface R2 on the side surface is within 100% and the spherical surface r1 on the bottom surface is within 120%. 6. The ratio of an inlet radius R1 which is half of the inlet diameter of the closed container to 100 is a ratio of the horizontal spherical surface r2 of the bottom surface to 3
The hermetic electric compressor according to claim 5, wherein the hermetic electric compressor is formed within 5%.