US20050142014A1

US20050142014A1 - Compressor with vibration reducing apparatus

Info

Publication number: US20050142014A1
Application number: US10/891,056
Authority: US
Inventors: Choong-Min Jung; Yong-Hwan Eom; Kwang-Ha Suh
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2003-12-30
Filing date: 2004-07-15
Publication date: 2005-06-30
Also published as: CN100390410C; KR20050068909A; CN1637285A

Abstract

A compressor comprises: a reciprocating motor disposed within a casing, for generating a driving force; a compressing unit for sucking gas, compressing, and discharging by a driving force of the reciprocating motor; and a vibration reducing apparatus installed on a flow path through which compressed gas is discharged from the compressing unit, for reducing vibration of the flow path due to the gas discharge. According to this, vibration and noise of the compressor are reduced and a function thereof is enhanced.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a compressor, and more particularly, to a compressor with a vibration reducing apparatus for reducing a vibration due to gas discharge.
2. Description of the Conventional Art
Generally, a compressor is a device for sucking, compressing, and discharging gas accordingly as a piston reciprocates in a cylinder.
As shown in FIG. 1, the conventional compressor comprises: a casing 10 to which a suction pipe 12 and a discharge pipe 14 are respectively connected; a reciprocating motor 30 disposed in the casing 10, for generating a driving force; a compressing unit 40 for sucking, compressing, and discharging gas by a driving force of the reciprocating motor 30; a spring unit 50 for inducing a resonant motion to a reciprocation of the reciprocating motor 30; and a frame unit 20 for respectively supporting the reciprocating motor 30, the compressing unit 40, and the spring unit 50.
The reciprocating motor 30 includes: an outer stator 31; an inner stator 32 disposed to maintain a certain air gap with an inner circumference of the outer stator 31; a magnet 34 disposed between the outer stator 31 and the inner stator 32; and a magnet holder 33 connected to the magnet 34 and reciprocated by an electromagnetic reciprocation between the outer/inner stators 31/32 and the magnet 34.
The compressing unit 40 includes: a cylinder 41 having an inner space therein; a piston 42 disposed in the cylinder 41, having a gas suction path F, and reciprocated by being connected to the magnet holder 33 of the reciprocating motor 30, for varying a volume of a compressing space P inside the cylinder 41; a suction valve 43 mounted at a front side of the piston 42 and operated by a pressure inside the compressing space P, for opening and closing a gas inlet; a discharge valve 44 installed at a front side of the cylinder 41, for opening and closing a gas outlet; a valve spring 45 for elastically supporting the discharge valve 44; and a discharge cover 46 communicated to the discharge pipe 14 through a guiding pipe 16, for covering the discharge side of the cylinder 41 by receiving the discharge valve 44 and the valve spring 45 therein.
As shown in FIG. 2, the discharge cover 46 includes: an inner cover 48 mounted at the front side of the cylinder 41 thus to provide a first discharge chamber S1 therein and having a plurality of discharge holes 47 at a circumference thereof; and an outer cover 49 mounted at an outer side of the inner cover 48 thus to provide a second discharge chamber S2 therein and connected to the guiding pipe 16.
The frame unit 20 includes: a first frame 21 mounted at the front side of the reciprocating motor 30 and the cylinder 41; a second frame 22 connected to the first frame 21, for supporting the reciprocating motor 30 with the first frame 21; and a third frame 23 connected to the second frame 22, for supporting the spring unit 50 with the second frame 22.
The spring unit 50 is composed of a front spring 51 disposed between a connection portion where the magnet holder 33 and the piston 42 are coupled with each other and the first frame 21; and a rear spring 52 disposed between the connection portion and the third frame 23. The spring unit 50 induces a resonant motion to a linear reciprocation of the piston 42 and the magnet holder 33.
In the conventional compressor, when a power is applied to the outer stator 31 of the reciprocating motor 30, the magnet holder 33 reciprocates by an electromagnetic interaction among the outer stator 31, the inner stator 32, and the magnet 34. According to this, the piston 42 connected to the magnet holder 33 reciprocates in the cylinder 41 thus to change a volume of the compressing space P. By the volume change of the compressing space P, gas is sucked to the compressing space P, compressed, which is repeated. Since the resonant motion is induced to the linear motion of the piston 42 by the front and rear springs 51 and 52, the piston 42 is smoothly and continuously reciprocated.
However, in the conventional compressor, vibration and noise are generated by a pressure of discharged gas. Also, high frequency vibration and noise are generated accordingly as the discharge valve 44 collides with the front end surface of the cylinder 41. The high frequency vibration is attenuated by the guiding pipe 16 in some degree. However, a part of the high frequency vibration is not attenuated but is transmitted to the casing 10 through the discharge pipe 14 thus to cause vibration and noise of the entire system of the compressor.

SUMMARY OF THE INVENTION

Therefore, an object of the present invention is to provide a compressor capable of reducing vibration and noise due to discharge gas and enhancing a capability thereof by providing a vibration reducing apparatus for reducing vibration transmitted to a flow path through which compressed gas is discharged.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a compressor comprising: a reciprocating motor disposed within a casing, for generating a driving force; a compressing unit for sucking gas, compressing, and discharging by a driving force of the reciprocating motor; and a vibration reducing apparatus installed on a flow path through which compressed gas is discharged from the compressing unit, for reducing vibration of the flow path due to the gas discharge.
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
In the drawings:
FIG. 1 is a sectional view showing a compressor in accordance with the conventional art;
FIG. 2 is an exploded perspective view showing a discharge cover provided at the compressor in accordance with the conventional art;
FIG. 3 is a sectional view showing a compressor according to a first embodiment of the present invention;
FIG. 4 is an exploded perspective view showing a vibration reducing apparatus provided at the compressor according to the first embodiment of the present invention;
FIG. 5 is a sectional view showing a part of the compressor and the vibration reducing apparatus according to the first embodiment of the present invention;
FIG. 6 is a sectional view showing a part of a compressor and a vibration reducing apparatus according to a second embodiment of the present invention;
FIG. 7 is a sectional view showing a part of a compressor and a vibration reducing apparatus according to a third embodiment of the present invention; and
FIG. 8 is a sectional view showing a vibration reducing apparatus provided at a compressor according to a fourth embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
Hereinafter, preferred embodiments of the present invention will be explained with reference to the attached drawings.

First Embodiment

As shown in FIG. 3, the compressor according to the first embodiment of the present invention comprises: a casing 10 installed with a suction pipe 12 through which gas is sucked and a discharge pipe 14 through which compressed gas is discharged; a reciprocating motor 30 disposed in the casing 10, for generating a driving force; a compressing unit 100 for sucking, compressing, and discharging gas by the driving force of the reciprocating motor 30; a spring unit 50 for inducing a resonant motion to a reciprocation of the reciprocating motor 30; and a frame unit 20 for respectively supporting the reciprocating motor 30, the compressing unit 100 and the spring unit 50; and a vibration reducing apparatus 170 installed on a flow path through which compressed gas is discharged from the compressing unit, for reducing vibration of the flow path due to the gas discharge.
The reciprocating motor 30 includes: an outer stator 31; an inner stator 32 disposed to maintain a certain air gap with an inner circumference of the outer stator 31; a magnet 34 disposed between the outer stator 31 and the inner stator 32; and a magnet holder 33 connected to the magnet 34 and reciprocated by an electromagnetic reciprocation between the outer/inner stators 31/32 and the magnet 34.
The compressing unit 100 includes: a cylinder 110 having an inner space; a piston 120 inserted into the cylinder 110, having a gas suction channel F therein, and reciprocated by being connected to the magnet holder 33 of the reciprocating motor 30, for varying a capacity of a compressing space P inside the cylinder 100; a suction valve 130 mounted at the front side of the piston 120 (hereinafter, the rear side denotes a gas suction side and the front side denotes a gas discharge side on the basis of the piston 120) and operated by a pressure inside the compressing space P, for opening and closing a gas inlet; a discharge valve 140 installed at the front side of the cylinder 110 for opening and closing a gas outlet; a valve spring 150 for elastically supporting the discharge valve 140; and a discharge cover 160 connected to the discharge pipe 14 through a guiding pipe 16 and accommodating the discharge valve 140 and the valve spring 150 therein.
As shown in FIG. 4, the discharge cover 160 includes: an inner cover 161 mounted at a front side of the cylinder 110 thus to provide a first discharge chamber S1 therein and having a plurality of discharge holes 163 at a circumference thereof; and an outer cover 162 mounted at an outer side of the inner cover 161 thus to provide a second discharge chamber S2 therein and connected to the guiding pipe 16.
The frame unit 20 includes: a first frame 21 mounted at a front side of the reciprocating motor 30 and the cylinder 110; a second frame 22 connected to the first frame 21 for supporting the reciprocating motor 30 with the first frame 21; and a third frame 23 connected to the second frame 22 for supporting the spring unit 50 with the second frame 22.
The spring unit 50 is composed of a front spring 51 disposed between a connection portion where the magnet holder 33 and the piston 120 are coupled with each other and the first frame 21; and a rear spring 52 disposed between the connection portion and the third frame 23. The spring unit 50 induces a resonant motion to a linear reciprocation of the piston 120 and the magnet holder 33.
As shown in FIG. 5, the vibration reducing apparatus 170 comprises a vibration absorbing chamber 172 formed to be separated from the second discharge chamber S2 of the outer cover 162 by a partition wall 176 and having a hermetic space 178 therein, the hermetic space 178 through which the guiding pipe 16 is penetrated; and a plurality of particles 174 filled in the vibration absorbing chamber 172.
The vibration absorbing chamber 172 is integrally formed with the outer cover 162 at the time of fabrication, or the vibration absorbing chamber 172 can be coupled to the outer cover 162 after being separately fabricated.
The particles 174 are formed of minute steel, tungsten carbide, granite, sand, small plastic, or etc. The particles 174 are preferably formed as a spherical shape in order to effectively reduce the vibration of the guiding pipe 16. The plurality of particles 174 attenuate vibration generated at the time of the operation of the compressor such as vibration due to the gas discharge or vibration generated when the discharge valve collides to the cylinder, by colliding with the inner wall of the vibration absorbing chamber 172 and the guiding pipe 16 or by colliding with each other and thereby generating a friction. A large amount of the particles 174 are preferably filled in the vibration absorbing chamber 172 in order to surround the outer circumference of the guiding pipe 16 and thereby to absorb vibration.
Operation and effect of the compressor according to the first embodiment of the present invention will be explained as follows. When a power is applied to the outer stator 31 of the reciprocating motor 30, the magnet holder 33 is linearly reciprocated by an electromagnetic interaction among the outer stator 31, the inner stator 32 and the magnet 34. According to this, the piston 120 connected to the magnet holder 33 is linearly reciprocated inside the cylinder 110 thus to vary the volume of the compressing space P. By the volume change of the compressing space P, gas is sucked into the compressing space P and compressed. The compressed gas is discharged into the first discharge chamber S1 of the inner cover 161 with pushing the discharge valve 140. Then, the compressed gas is discharged to the second discharge chamber S2 of the outer cover 162 through the discharge holes 163, and is discharged to outside of the casing 10 through the guiding pipe 16 and the discharge pipe 14. Said processes are repeated thus to compress gas.
When gas is discharged, the discharge valve 140 is spaced from the cylinder 110 thus to be open and closed, thereby causing high frequency vibration due to a strong impact. The high frequency vibration is transmitted to the second discharge chamber S2 of the outer cover 162 through the inner cover 161, and then is transmitted to the guiding pipe 16. At this time, the particles 174 surrounding the guiding pipe 16 are fluctuated by the high frequency vibration transmitted through the guiding pipe 16, and thus collide with the guiding pipe 16 or collide with each other, thereby attenuating the high frequency vibration. Also, while compressed gas passes through the first discharge chamber S1 and the second discharge chamber S2 provided at the inner cover 161 and the outer cover 162, the noise is effectively removed.
The compressor according to the first embodiment of the present invention is provided with the vibration reducing apparatus on the flow path through which compressed gas flows thus to prevent vibration generated by the gas discharge from being transmitted to the channel, thereby reducing vibration and noise of the compressor and enhancing the function of the compressor.

Second Embodiment

Hereinafter, the compressor according to the second embodiment of the present invention will be explained with reference to FIG. 6. The same reference numerals were given to the same parts as those of the first embodiment, thereby omitting explanations.
In the compressor according to the second embodiment of the present invention, a vibration reducing apparatus 270 for preventing vibration generated by gas discharge from being transmitted to the guiding pipe 16 comprises a vibration absorbing chamber 272 connected to the guiding pipe 16 and disposed outside a discharge cover 260 which is mounted at a front side of the cylinder 110 thus to provide a discharge chamber S, thereby providing a space therein with the discharge cover 260; and a plurality of particles 274 filled in the vibration absorbing chamber 272. An installation and a construction of the vibration reducing apparatus 270 can be simplified by installing the vibration absorbing chamber 272 to cover the discharge cover 260.
Operation and effect of the compressor according to the second embodiment of the present invention are same as those according to the first embodiment.

Third Embodiment

Hereinafter, the compressor according to the third embodiment of the present invention will be explained with reference to FIG. 7. The same reference numerals were given to the same parts as those of the second embodiment, thereby omitting explanations.
In the compressor according to the third embodiment of the present invention, a vibration reducing apparatus 370 for preventing vibration generated by gas discharge from being transmitted to the guiding pipe 16 comprises: a vibration absorbing chamber 372 installed to cover an outer circumference of the guiding pipe 16 for guiding compressed gas discharged from the discharge cover 160 to the discharge pipe 14 and having a hermetic space therein; and a plurality of particles 374 filled in the vibration absorbing chamber 372. The vibration reducing apparatus 370 attenuates high frequency vibration that passes through the guiding pipe 16, and thereby prevents the high frequency vibration from being transmitted to outside.
Operation and effect of the compressor according to the third embodiment of the present invention are same as those according to the aforementioned embodiments.

Fourth Embodiment

Hereinafter, the compressor according to the fourth embodiment of the present invention will be explained with reference to FIG. 8. The same reference numerals were given to the same parts as those of the aforementioned embodiments, thereby omitting explanations.
In the compressor according to the fourth embodiment of the present invention, a vibration reducing apparatus 470 for preventing vibration generated by discharge gas from being transmitted to the casing 10 and the external system of the compressor through the guiding pipe 16 and the discharge pipe 14 is installed at the discharge pipe 14. That is, the vibration reducing apparatus 470 comprises a vibration absorbing chamber 472 fixed to the casing 10 to surround an outer circumference of the discharge pipe 14 and having a hermetic space therein; and a plurality of particles 474 filled in the vibration absorbing chamber 472. The vibration reducing apparatus 470 attenuates high frequency vibration accordingly as the particles 474 inside the vibration absorbing chamber 472 are fluctuated by the high frequency vibration transmitted to the discharge pipe 14 through the guiding pipe 16 thus to collide with the discharge pipe 14 or particles collide with each other thus to generate a frictional force. According to this, vibration generated by discharge gas and vibration generated by an operation of the discharge valve are prevented from being transmitted to the guiding pipe 16, the discharge pipe 14, and the casing 10.
Operation and effect of the compressor according to the fourth embodiment of the present invention are same as those according to the aforementioned embodiments.
As aforementioned, in the compressor according to the present invention, the vibration reducing apparatus for reducing vibration generated by discharge gas is provided on the flow path of compressed gas, thereby preventing vibration of the compressor or the entire system to which the compressor is applied. The vibration reducing apparatus explained in each embodiment of the present invention can be independently applied to the compressor, or can be applied thereto by being combined one another. Also, the vibration reducing apparatus of the present invention is not limited to the reciprocating compressor that the piston is linearly reciprocated, but can be applied to various compressors.
As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A compressor comprising:

a reciprocating motor disposed within a casing, for generating a driving force;

a compressing unit for sucking gas, compressing, and discharging by a driving force of the reciprocating motor; and

a vibration reducing apparatus installed on a flow path through which compressed gas is discharged from the compressing unit, for reducing vibration of the flow path due to the gas discharge.

2. The compressor of claim 1, wherein the vibration reducing apparatus includes:

a vibration absorbing chamber through which the flow path is penetrated; and

a plurality of particles filled in the vibration absorbing chamber to surround the flow path.

3. The compressor of claim 2, wherein the particles are formed of at least one of steel, tungsten carbide, granite, and plastic.

4. The compressor of claim 3, wherein the particles are formed as a spherical shape.

5. A compressor comprising:

a casing to which a suction pipe and a discharge pipe are connected;

a reciprocating motor disposed within the casing, for generating a driving force;

a cylinder disposed in the casing and providing a compressing space therein;

a piston connected to the reciprocating motor and reciprocated in the cylinder, for sucking, compressing, and discharging gas;

a discharge cover for covering a discharge side of the cylinder and providing a discharge chamber; and

a vibration absorbing chamber disposed at one side of the discharge cover, through which a flow path of compressed gas discharged from the discharge cover is penetrated, and filled with a plurality of particles therein.

6. The compressor of claim 5, wherein the discharge cover includes:

an inner cover installed to cover the discharge side of the cylinder thus to provide a first discharge chamber therein and having a plurality of discharge holes at a circumference thereof; and

an outer cover mounted at an outer side of the inner cover thus to provide a second discharge chamber therein and connected to the discharge pipe.

7. The compressor of claim 5, wherein the vibration absorbing chamber is disposed to cover an outer side of the discharge cover.

8. The compressor of claim 5, wherein the vibration absorbing chamber is separated from the discharge chamber of the discharge cover by a partition wall.

9. A compressor comprising:

a casing to which a suction pipe and a discharge pipe are connected;

a reciprocating motor disposed in the casing, for generating a driving force; a compressing unit for sucking, compressing, and discharging gas by a driving force of the reciprocating motor;

a guiding pipe for guiding compressed gas discharged from the compressing unit to the discharge pipe; and

a vibration absorbing chamber formed to surround the guiding pipe and filled with a plurality of particles therein.

10. The compressor of claim 9, further comprising a vibration absorbing apparatus formed at the casing to cover the discharge pipe and filled with a plurality of particles therein.

11. A compressor comprising:

a casing installed with a suction pipe through which gas is sucked thereinto and a discharge pipe through which compressed gas is discharged;

a driving motor disposed within the casing, for generating a driving force;

a compressing unit for sucking, compressing, and discharging gas by a driving force of the driving motor; and

a vibration absorbing chamber formed at the casing to surround the discharge pipe and filled with a plurality of particles therein.