JPH05164047A - Closed type motor-driven compressor - Google Patents

Abstract

PURPOSE:To provide a compressor in which vibration is small and an operating sound is quiet by supporting a compression element with two kinds of springs having different spring constant so as to reduce the vibration and a noise of the closed type compressor used in a refrigerator and so on. CONSTITUTION:In a support device to reduce vibration of a compressor, a stay 30 is installed in a part where the vibration of the compressor is the smallest, and is supported with two kinds of soft springs. The device is composed of a spring holder 22, the stay 30, a snubber 24, a soft compression spring 25 and a tensile spring 29 having different spring constant from the compression spring 25.

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.

[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 low noise, and the required level thereof is becoming strict every year. An example of a conventional compressor will be described below with reference to the drawings. FIG. 3 is a side sectional view of the compressor disclosed in Japanese Utility Model Laid-Open No. Sho 64-3086. Inside the closed container 1, a combination body 4 in which a compression element 2 and an electric element 3 are integrally combined is arranged. The compression element 2 is composed of a cylinder 5, a piston 6 that reciprocates in the cylinder, a crankshaft 7 that rotates integrally with the rotor 3a of the electric element 3, and a conrot 8 that converts rotational movement into reciprocation by rotation of the crankshaft. ing. Reference numeral 9 is a crank stop that regulates the movement of the crankshaft.

Reference numeral 10 is a tube welded to the closed container 1. Reference numeral 11 denotes a compressor leg which is welded to the closed container 1 and used for mounting the compressor. Reference numeral 12 is a support member, a lower part of which is welded to the closed container 1 and a support tool 12a is provided on an upper part thereof. A coil spring 13 is press-fitted into the support tool 12a to elastically support a support protrusion 14 integrated with the compression element 2. ing.
Reference numeral 15 is a hermetic terminal that is hermetically welded to the closed container 1 and guides electricity to the electric element 3.

[0004]

However, in the above-mentioned structure, since the coil spring 13 is hard and supports the point where the vibration is large, the vibration and the noise reach the now required severe level. It had a non-existent task.

In view of the above problems, the present invention provides a compressor having low vibration and noise.

[0006]

In order to solve the above-mentioned problems, the compressor of the present invention is such that a combined body in which a compression element and an electric element are integrally combined is elastic in a hermetic container by a compression spring and a tension spring. The spring constant of the compression spring is made larger than that of the tension spring.

[0007]

According to the present invention, the vibration of the combined body is reduced by the compression spring and the tension spring due to the above structure.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A compressor according to an embodiment of the present invention will be described below with reference to the drawings.

The same components as those of the conventional example will be described using the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, a compression element 2 is placed in a closed container 1.
And a combined body 20 in which the electric element 3 is integrally combined,
The supporting device elastically supports the combined body 20 in the closed container 1.

This support device includes a spring holder 22, a stay 30, a snub bar 24 and a soft compression spring 2.
5 and a tension spring 29 having a spring constant different from that of the compression spring.

The stay 30 is mounted on the upper surface of the motor with the smallest vibration in this type of compressor. By the way, according to the inventor's test, the point A on the upper surface of the motor is 40 micrometers, and the vibration on the lower surface of the motor is B in the direction of the piston
The point is 80 micrometers, the C point at the end of the compression element is 23
It is 0 micrometer, and the top surface of the motor is the smallest.

By supporting the upper surface of the motor, the combined body 2
The transmission of vibration from 0 to the closed container 1 is minimized.

The spring holder 22 has a plurality of spring engaging portions, that is, a spring engaging portion 28 and a protrusion 23. Then, it is fixed to the closed container 1.

The stay 30 is attached to the end surface of the electric element 3 integrally with the snubb bar 24. Compression spring 25
Supports the combined body 20 via the snubb bar 24 and the stay 30, and one end of the tension spring 29 is fixed to the stay 30 and the snubb bar 24, and the other end is locked to the spring locking portion, so that the tension spring 29 is soft and has a constant spring. The combined body 20 is elastically supported by two different types of springs.

Further, the above-mentioned supporting device is arranged in the space 21 between the closed container 1 and the electric element 3.

The spring holder 22 is integrally formed with a protrusion 23 for locking the compression spring and a locking portion 28 for the tension spring.

The snubb bar 24 has a seat 26 for locking the spring formed on the outer diameter, and a screw 27 for screwing the spring on the inner diameter.

In the above-mentioned structure, the vibration is greatly reduced by the two kinds of springs having the above-mentioned structures which are soft and have different spring constants.

Therefore, it is possible to obtain a quiet compressor which has little vibration during operation and little noise.

[0021]

As described above, according to the present invention, there is provided a hermetically sealed container in which a compression element and an electric element are integrally combined, and a supporting device for elastically supporting the hermetically sealed container in the hermetically sealed container. The supporting device includes a spring holder, a stay, a snub bar, a soft compression spring, and a tension spring having a spring constant different from that of the compression spring, and the spring holder has a plurality of spring locking portions and is provided in the closed container. The stay is fixedly attached to the end surface of the electric element integrally with the snubb bar, the compression spring supports the combined body through the snubb bar and the stay, and the tension spring is attached to the stay and the snubb bar. Two types with one end fixed and the other end locked to the spring holder, which are soft and have different spring constants. Elastically supporting the conjugate by a spring.

Further, the two types of soft springs having different spring constants and having the above-mentioned structure in which the supporting device is disposed in the space between the closed container and the electric element can greatly reduce the vibration. .

Therefore, it is possible to obtain a quiet compressor which has little vibration during operation and little noise.

[Brief description of drawings]

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

FIG. 2 is a perspective view of the spring holder shown in FIG.

FIG. 3 is a side sectional view of a conventional compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airtight container 3 Electric element 20 Combined body 21 Space 22 Spring holder 23 Protrusion 24 Snab bar 25 Compression spring 26 Seat 27 Screw 28 Spring locking part 29 Tension spring 30 Stay

Claims (1)

[Claims] 1. A hermetic container, a combined body in which a compression element and an electric element are combined with each other, the other end being connected to the combined body, and a compression spring attached to the closed container at the other end, and the combined body. A hermetic electric compressor, comprising: a tension spring attached to a closed container at the other end, wherein a spring constant of the compression spring is larger than a spring constant of the tension spring.