KR100202915B1 - Anti-vibrating device of compressor - Google Patents

Abstract

The present invention relates to a compressor vibration preventing device for reducing vibration by improving a structure in which a hermetic compressor of a refrigerator is installed in a refrigerator.

The compressor 10 has an operating portion such as a high-pressure generating portion and a motor portion inside a sealed case 11, and the bracket 21 is fixed to an outer lower end thereof. An upper support (31) is installed in contact with the upper end of the closed case (11). A dustproof pad (32) is installed on the bracket (21) at the lower end of the closed case (11); The upper support 31 is fixed by using a lower rod 34, an upper rod 35 and an elastic member 33 interposed therebetween.

Accordingly, there is an effect of improving the reliability of the product by reducing the vibration of the compressor including the fine high-frequency component by improving the installation structure in the refrigerator of the hermetic compressor of the refrigerator having the means for sucking and discharging the refrigerant into the sealed case.

Description

Compressor vibration prevention device

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a compressor, and more particularly, to a compressor in which a hermetic compressor of a refrigerator having a means for sucking and discharging a refrigerant in a closed casing is improved in a refrigerator, .

BACKGROUND ART [0002] In a refrigerator, a compressor is a means for converting a rotational force due to electrical energy into a mechanical energy of reciprocating motion, and a refrigerant having a low boiling point passes through the compressor to a high pressure (about 12 atmospheres). The high-pressure refrigerant is cooled in the condenser to be in a liquid state. When this liquid-state refrigerant is vaporized in the cooler, one refrigeration cycle is completed.

FIG. 1 is an exemplary view schematically showing the internal structure of a hermetic compressor.

The compressor (10) has a structure in which a suction pipe and a discharge pipe of a refrigerant are connected to the outside of the closed casing (11) and a high pressure generating part is installed inside. The high pressure generating portion can be divided into a cylinder 13, a piston 14, a valve 15 and the like. The motor portion having the stator 18, the rotor 19, do.

The frame 17 on which the cylinders 13, the pistons 14, the valves 15 and the like, which are high-pressure generating units, is mounted is integrally formed with a bushing serving as a sliding bearing in the center thereof to support the eccentric shaft 12. The eccentric shaft 12 generates a predetermined rotational force with the stator 18, in which the rotor 19 is press-fitted and fixed to the frame 17.

An eccentric shaft 12 rotated by a motor unit using a single-phase induction motor induces a cam movement of the eccentric cam at an upper portion of the eccentric shaft 12, and the cam movement again reciprocates the piston 14 in the cylinder 13 through the connecting rod And the valve 15 is opened and closed by the pressure difference between both sides formed at this time to move the refrigerant in one direction.

The refrigerant introduced through the suction pipe flows into the cylinder 13 through a suction muffler (not shown) after being filled in the closed casing 11. The refrigerant compressed in the cylinder 13 flows into the discharge muffler 16, (Not shown) through the discharge pipe. The suction muffler and the discharge muffler 16 serve to reduce the compressor noise that occupies most of the refrigerator operating noise.

Although not shown in the drawings, the compressor 10 is installed at the rear end of the refrigerator. Since the compressor 10 has a high-pressure generating unit that compresses and discharges the refrigerant in a high-temperature and high-pressure state as described above, It has a dustproof structure.

The rounded structure of the compressor 10 includes a circular rubber 22 provided between a plurality of brackets 21 fixed to the outer lower end of the closed case 11 and the refrigerator frame 23, And the top of the frame is placed in the free end.

Generally, the circular rubber 22 has a wide applicability, such as being used in the compression direction and the shearing direction as well as in the slanting direction, depending on the installation direction, so that a high spring constant can be obtained and a large load can be supported. 10 can not be reduced.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a refrigerator which has a structure in which a hermetic compressor of a refrigerator having means for sucking and discharging refrigerant in a closed casing is installed in a refrigerator, And an object of the present invention is to provide a vibration damping device for a compressor.

1 is an exemplary view schematically showing an internal structure of a hermetic compressor;

FIG. 2 is a front view of a compressor in which a dustproof device according to the present invention is installed; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

10: compressor 11: sealed case

12: eccentric shaft 13: cylinder

14: piston 15: valve

16: discharge muffler 17: frame

18: stator 19: rotor

21: Braket 22: Round rubber

23: frame 31: upper support

32: dustproof pad 32a: upper pad

32b: lower pad 33: spring

34: lower rod 35: upper rod

36: Rubber plate

In order to achieve the above object, the present invention provides a compressor (10) having an operating part such as a high-pressure generating part motor part inside a closed casing (11) and a bracket (21) An upper support (31) is installed in contact with the upper end of the closed case (11). A dustproof pad (32) is installed on the bracket (21) at the lower end of the closed case (11); Wherein the upper support (31) is fixed using a lower rod (34), an upper rod (35) and an elastic member (33) interposed therebetween.

At this time, in the upper support 31, a plurality of branch plates are formed at equal intervals, and a rubber plate 36 is bonded to the lower end of each branch plate.

The vibration damping pad 32 is composed of an upper pad 32a and a lower pad 32b having grooves formed at equal intervals on the bottom surface and each vibration damping pad 32 is formed so that the grooves intersect at right angles Respectively.

[Example]

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIG. 2 attached hereto.

FIG. 2 is a front view of a compressor in which the vibration isolation device according to the present invention is installed.

The present invention has an operating portion such as a motor portion constituted by a high pressure generating portion constituted of a cylinder, a piston, a valve or the like and a stator and a rotor inside the closed case 11, The present invention is applied to a hermetic compressor for a refrigerator in which a bracket 21 is fixed.

At this time, the compressor of the present invention is installed so that the upper support 31 is in contact with the upper end of the closed case 11.

The conventional vibration damping structure of the compressor 10 has a structure in which the vibration proof rubber is installed at the lower outer end of the closed case 11 and the upper end of the closed case 11 is set at the free end, However, since the vibration of the compressor 10 is heavy during the movement of the refrigerator, the vibration proof rubber of the lower end is liable to be deformed, so that the disadvantage is compensated through the upper support 31.

In the upper support 31, a plurality of branch plates are formed at equal intervals, and a rubber plate 36 is bonded to the lower end of each branch plate.

Normally, at least four branch plates of the upper support 31 are formed, but they are suitably increased in consideration of the size and vibration characteristics of the closed casing 11 according to the compressor type. The upper support 31 is brought into contact with the curved surface of the enclosure 11 through the rubber plate 36. [ So that the compression force applied by the upper support 31 to the enclosure 11 is evenly distributed in each of the branch plates.

A dustproof pad (32) is provided on the bracket (21) at the lower end of the closed case (11).

Since the conventional circular rubber 22 is small and can obtain a high spring constant and is used as a dustproof means of the compressor, it does not reduce the fine high frequency component generated in the high pressure generating portion of the compressor 10, ) To compensate for these drawbacks.

The vibration damping pad 32 is composed of an upper pad 32a and a lower pad 32b having grooves at equal intervals on the bottom surface and each vibration damping pad 32 is installed so that the grooves intersect at a right angle .

The upper pad 32a and the lower pad 32b are formed to have the same size and use two vibration damping pads 32 arranged so that the lower grooves are orthogonal to each other in order to reduce the fine high- will be. In some cases, two or more sheets may be continuously laminated in the same manner.

Although not shown in the drawings, it is preferable to provide the same as the conventional circular rubber 22 between the bracket 21 and the fixing bolt.

The necessary area of the vibration pad 32 is calculated by finding the weight of the compressor and the vibration frequency (excitation frequency) of the compressor and setting the vibration transmission rate TR. The vibration frequency is a frequency generated by the high-pressure generating portion of the compressor. The vibration frequency is suitably 10 to 30% as an excitation force generated by the excitation force / compressor transmitted to the foundation.

At this time, the amount of bending of the vibration-proof pad 32 necessary to obtain the vibration conductivity required for the specific vibration frequency is obtained using a vibration transmission rate table (not shown), and a material having the bending amount characteristic is selected.

On the other hand, natural rubber, nitrile rubber, neoprene, and butyl rubber are used as the material of the anti-vibration rubber, and their characteristics are as follows.

(1) Natural rubber: Used for applications requiring good elasticity and low temperature characteristics. It is applied to the environment where it does not come into direct sunlight, oil, medicine and so on.

(2) Nitrile rubber: It is applied to places requiring good oil resistance and heat resistance.

(3) Neoplan: It is applied to places where weather resistance and heat resistance are required and some oil resistance is required.

(4) Butyl rubber: Especially for applications requiring large vibration damping capability.

The compressor to which the present invention is applied is not influenced by oil or chemicals but is installed in a relatively high temperature environment of the sealed case 11 so that the vibration proof pad 32 is preferably made of nitrile rubber or neoprene.

If the oscillation rate and the vibration frequency are known, the amount of deflection of the vibration pad 32 can be selected, and the surface pressure of the vibration pad 32 is appropriately selected from the amount of deflection.

The upper support 31 of the present invention is fixed by using a lower rod 34, an upper rod 35 and an elastic member 33 interposed therebetween.

The upper rod 35 is fixed to the frame of the refrigerator by a bolt fastening method and the lower rod 34 is fixed by a bolt fastening method which can adjust the height at the center of the upper support 31.

The height adjustable structure of the lower rod 34 can be easily installed even if the size of the enclosure 11 varies according to the type of the compressor, and the spring constant of the elastic member 33 can be easily adjusted.

The elastic member 33 attenuates vibrations mainly in the vertical direction mainly by using the coil spring, but the vibration in the horizontal direction is also attenuated to some degree since the upper support 31 is provided on the inclined curved surface of the closed case 11.

As described above, the compressor vibration preventing device of the present invention improves the installation structure in the refrigerator of the hermetic compressor of the refrigerator having the means for sucking and discharging the refrigerant into the inside of the hermetic casing, Thereby improving the reliability of the product.

Although the present invention has been shown and described with respect to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as set forth in the following claims Those skilled in the art will readily understand the present invention.

Claims (3)

A compressor (10) having an operating portion such as a high-pressure generating portion and a motor portion inside a closed casing (11) and a bracket (21) fixed to an outer lower end thereof; An upper support (31) is installed in contact with the upper end of the closed case (11). A dustproof pad (32) is installed on the bracket (21) at the lower end of the closed case (11); Wherein the upper support (31) is fixed using a lower rod (34), an upper rod (35), and an elastic member (33) interposed therebetween. The apparatus according to claim 1, wherein a plurality of branch plates are formed at equal intervals in the upper support (31), and a rubber plate (36) is adhered to the lower end of each branch plate. The vibration damping pad according to claim 1, wherein the vibration damping pad comprises an upper pad and a lower pad, the upper pad and the lower pad being formed at equal intervals on the bottom surface, Wherein the plurality of compressors are installed at right angles to each other.