KR100202896B1 - Case with a vibration prevention band for a hermetic compressor - Google Patents

Abstract

The present invention relates to a hermetic compressor having a dustproof band for reducing vibrations caused by a high pressure generating part in a hermetic compressor having a means for suctioning and discharging a refrigerant in a case used in a refrigerator.

A compressor (20) to which a high-pressure generating means composed of a cylinder, a piston, a valve, and the like is mounted is provided inside a hollow case (21) of a tubular structure in which upper and lower split cans are welded, Or the horizontal vibration damping band (22) and the vertical vibration damping band (23) having an annular structure having a predetermined width on the outer side are bonded on the horizontal plane and the vertical plane, respectively, to reduce the vibration of the case (21) Lt; / RTI >

Accordingly, in the hermetic compressor having the means for sucking and discharging the refrigerant in the inside of the case, a plurality of vibration damping bands are attached to the case, so that the vibration due to the high pressure generating portion in the case and the noise There is an effect of reducing.

Description

Enclosed compressor case with anti-vibration band

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a compressor, and more particularly, to a hermetic compressor used in a refrigerator and having means for sucking and discharging a refrigerant into a case, And a case for a vehicle.

BACKGROUND ART 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 is put into a high pressure state of about 12 atmospheres while passing through the compressor. 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 a front view schematically showing an internal configuration of a hermetic compressor.

The compressor 10 includes a high pressure generating means which is connected to a suction pipe (not shown) and a discharge pipe (not shown) of a refrigerant to the outside of the case 11 and is driven by a motor 18 constituted by a stator and a rotor It is a mounted structure. The high pressure generating means constituted by the cylinder piston 14 and the valve 15 is mounted on the frame 17 so that the shaft 12 rotated by the motor 18 induces eccentric cam movement , The cam movement reciprocates the piston (14) in the cylinder (13) through the connecting rod again, 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 into the suction pipe of the hermetically sealed compressor having such a high pressure generating means flows into the cylinder 13 through the suction muffler after being filled in the inside of the muffle case 11 and the refrigerant compressed in the cylinder 13 flows into the discharge muffler 16 (Not shown) through an exhaust pipe.

At this time, the suction muffler and the discharge muffler 16 are used to reduce the noise of the compressor occupying most of the refrigerator operating noise. In particular, it is effective to reduce the fluid noise as the refrigerant flows at high speed in the compressor.

However, in addition to the above fluid noise, the high-pressure generating means causing the noise also generates noise such as noise due to friction between the cylinder 13 and the piston 14, noise due to impact upon opening and closing of the valve 15, Noise is a kind of vibration-induced noise that can be reduced through proper vibration isolation.

The frame 17 on which the high pressure generating means composed of the cylinder 13, the piston 14, the valve 15 and the like is mounted in the conventional compressor 10 is connected to the lower end And the vibration damping function is performed to some extent, but its effect is insufficient.

In addition, there is a case where an iron plate is welded locally to the outside of the case 11, but it is difficult to effectively reduce the vibration, and thus it is difficult to expect the effect of noise reduction.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a hermetic compressor case having a vibration damping band for reducing vibrations caused by a high-pressure generating portion and noise caused by a high-pressure generating portion in a hermetic compressor having a means for suctioning and discharging refrigerant, It is for that purpose.

1 is a front view schematically showing an internal configuration of a hermetic compressor.

2a and 2b are a schematic front view and a top view, respectively, of a compressor for indicating the mounting position of the vibration-proof band according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

10: compressor (conventional) 11: milf case (conventional)

12: shaft 13: cylinder

14: piston 15: valve

16: discharge muffler 17: frame

18: motor 19: spring

20: compressor (present invention) 21: milf case (present invention)

22: horizontal vibration band 23: vertical vibration band

Xm, Ym, Zm: maximum displacement point N: nodal point

In order to achieve this object, the present invention provides a compressor (20) in which a high pressure generating means constituted by a cylinder, a piston, a valve or the like is mounted in a hollow case (21) The horizontal vibration damping band 22 and the vertical vibration damping band 23 each having an annular structure having a predetermined width on the inner or outer surface of the case 21 are bonded on the horizontal plane and the vertical plane respectively to reduce the vibration of the case 21 And a case for a sealed type compressor having an anti-vibration band.

At this time, the horizontal vibration damping band 22 is bonded to the maximum displacement point Zm on the vertical plane of the case 21, and the vertical vibration damping band 23 is bonded to the maximum displacement point Xm on the horizontal plane of the case 21 Ym.

The horizontal vibration damping band 22 and the vertical vibration damping band 23 may be bonded to each other via heat resistant vibration damping rubbers in place of directly bonding the vibration damping bands 21 to each other.

[Example]

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

1, the present invention can be applied to a compressor in which a high-pressure generating means constituted by a cylinder 13, a piston 14, a valve 15 and the like is mounted inside a hollow case 21 of a cylinder structure in which upper and lower divided cans are welded (20).

Vibration generated in the compressor 10 having various vibration sources such as the eccentric movement of the shaft 12, the reciprocating motion of the piston 14 and the opening and closing motion of the valve 15 is transmitted to the spring 19 supporting the frame 17 The resonance frequency of the case 11 is measured to be in the range of approximately 2000 to 4000 Hz when the number of revolutions of the motor 18 is 3600 rpm.

Although not shown in the drawings, the compressor 10 is installed at the rear end of the refrigerator. The refrigerator has an appropriate dustproof structure because it is a major source of vibration as well as operating noise in the refrigerator. The compressor (10) adopts a dustproof structure in which a plurality of brackets fixed to the outer lower end of the case (11) are mounted on the refrigerator frame via a circular rubber.

Generally, the circular rubber has wide applicability such as being used in the compression direction and the shearing direction as well as in the oblique direction according to the installation direction, and it is possible to obtain a high spring constant with a small size to support a large load, There is a drawback in that the fine high-frequency component generated in the high-pressure generating portion can not be reduced.

2a and 2b show a schematic front view and a top view of a compressor for indicating the mounting position of the vibration-proof band according to the invention.

The present invention is characterized in that the horizontal vibration damping band 22 and the vertical vibration damping band 23 having an annular structure having a predetermined width on the inner or outer surface of the case 21 are bonded on the horizontal surface and the vertical surface respectively, ).

The compressor (20) of the present invention includes a spring (19) (the first view) installed therein as in the compressor (10) of the first figure described above as the first anti-vibration means, and a circular rubber The horizontal vibration damping band 22 and the vertical vibration damping band 23 constitute the third vibration damping means.

When the vibration modes of the case 21 of the compressor 20 are measured on the X-axis, the Y-axis and the Z-axis, respectively, the amplitude is small at the upper and lower portions of the vertical plane and larger at the central portion as indicated by the dotted line in FIG. At this time, the portion with the largest amplitude is referred to as a maximum displacement point (Zm).

As shown by a dotted line in FIG. 2b, a node point N at which no displacement of vibration occurs is formed at a predetermined point on the horizontal plane. At a point spaced from the node point N by about 45 degrees, appear. At this time, the portion with the largest amplitude is referred to as a maximum displacement point (Xm, Ym).

The maximum displacement points Xm, Ym and Zm are determined by the type of the compressor, the characteristics of the spring 19 (first figure) provided inside the inside of the inside of the inside of the inside of the inside of the inside of the inside of the inside of the inside of the inside of the inside of the inside of It is determined by actual measurement.

At this time, the horizontal vibration damping band 22 is bonded to the maximum displacement point Zm on the vertical plane of the case 21, and the vertical vibration damping band 23 is bonded to the maximum displacement point Xm on the horizontal plane of the case 21 Ym.

The horizontal vibration damping band (22) and the vertical vibration damping band (23) are joined by bonding an iron plate having a certain width to the entire circumference of the case (21). As described above, the stiffness of the case 21 having the vibration-damping bands 22, 23 at the maximum displacement points Xm, Ym, Zm is increased and the spring constant is changed.

Accordingly, when the natural frequency of the case 21 is changed, the amplitude of vibration is reduced beyond the resonance frequency in the range of 2000 to 4000 Hz.

In order to prevent the horizontal vibration damping band 22 and the vertical vibration damping band 23 from crossing each other, the horizontal vibration damping band 22 is formed on the inner surface of the inner case 21, .

[Modified Embodiment]

The horizontal vibration damping band 22 and the vertical vibration damping band 23 may be bonded to each other via heat resistant vibration damping rubbers in place of directly bonding the vibration damping bands 21 to each other.

In this case, instead of bonding the vertical vibration band 23 provided outside the case 21 to the case 21 by welding or the like, the vibration-proof rubber is uniformly arranged at a plurality of points, . The horizontal vibration damping band 22 installed in the inside of the case 21 is arranged in a plurality of positions uniformly in place of welding by means of welding or the like and then mounted with elastic force in accordance with the contraction of the band.

The contact area of the anti-vibration rubber is calculated by determining the weight of the compressor and the exciting frequency, and setting the vibration transmission ratio (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.

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.

It is possible to select the vibration amount of the vibration-proof rubber by knowing the vibration frequency and the vibration frequency, and the appropriate surface vibration of the vibration-proof rubber is selected from the amount of vibration.

In the above embodiment, the horizontal vibration band 22 and the vertical vibration band 23 are provided, respectively. However, after the vibration bands 22 and 23 are installed, the vibration mode is measured again It is also possible to attach an additional vibration band to a portion having a predetermined amplitude or more.

As described above, according to the present invention, there is provided a closed type compressor case having a dustproof band according to the present invention, which is used in a refrigerator and has a means for sucking and discharging a refrigerant into the inside of the case, There is an effect of reducing the vibration caused by the high-pressure generating portion in the case and the noise caused thereby.

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)

(21) having a cylindrical structure in which upper and lower split cans are welded are mounted with a high pressure generating means composed of a cylinder, a piston, a valve or the like, characterized in that: the inner surface or the outer surface (22) and the vertical vibration damping band (23) having an annular structure having a predetermined width are bonded on the horizontal plane and the vertical plane, respectively, so as to reduce the vibration of the case (21) Compressor case. The vertical vibration damping device according to claim 1, wherein the horizontal vibration damping band (22) is bonded to a maximum displacement point (Zm) on a vertical plane of the case (21) To the point (Xm or Ym). The vibration damping device according to claim 1, wherein the horizontal vibration damping band (22) and the vertical vibration damping band (23) are bonded to each other via heat resistant vibration damping rubbers Compressor case.