WO2005028870A1

WO2005028870A1 - Stopper of compressor

Info

Publication number: WO2005028870A1
Application number: PCT/KR2004/000527
Authority: WO
Inventors: Dong-Won Lee
Original assignee: Lg Electronics Inc.
Priority date: 2003-09-22
Filing date: 2004-03-12
Publication date: 2005-03-31
Also published as: KR100548446B1; CN1856649A; CN100412366C; KR20050029416A

Abstract

A stopper of a compressor comprising: a hermetic container (10) having a predetermined inner space; a compressing assembly (20) disposed in the hermetic container (10) for compressing gas by a driving force of a driving motor; and an elastic supporting means mounted between the hermetic container (10) and the compressing assembly (20) for elastically supporting the compressing assembly (20), comprises: a movement limiting means provided at the hermetic container and the compressing assembly for limiting a movement of the compressing assembly (20) in horizontal and vertical directions. According to this, a collision between the compressing assembly (20) disposed inside the hermetic container (10) and the hermetic container (10) is prevented, thereby preventing a damage of components and reducing an occurrence of collision noise. Also, a structure and construction components are simplified, and the number of assembly processors is decreased.

Description

Description STOPPER OF COMPRESSOR Technical Field

[1] The present invention relates to a compressor, and more particularly, to a stopper of a compressor capable of preventing a collision between a compressing assembly disposed in a hermetic container for compressing gas by generating a driving force and the hermetic container. Background Art

[2] In a modern society, a refrigerator for storing food in more fresh state and an air conditioner for maintaining indoor as more comfortable state are absolutely necessary. In the refrigerator and the air conditioner, a refrigerating cycle system including a compressor, a condenser, a capillary tube, and an evaporator is utilized.

[3] The compressor constituting the refrigerating cycle system converts an electric energy into a kinetic energy, and compresses a refrigerant by the kinetic energy. The compressor is a core component constituting the refrigerating cycle system.

[4] The compressor can be classified into a rotary compressor, a scroll compressor, a reciprocal compressor, and etc. according to a compression mechanism for compressing a refrigerant.

[5] Said compressors basically include a hermetic container, a driving motor disposed in the hermetic container for generating a driving force, and a compression unit for compressing a refrigerant by receiving a driving force of the driving motor.

[6] In the rotary compressor, when the driving motor generates a rotational force, a roller constituting the compression unit receives the rotational force thus to be rotated in a compression space, thereby sucking, compressing, and discharging a refrigerant with an operation of a vane.

[7] In the scroll compressor, when the driving motor generates a rotational force, an orbit scroll constituting the compression unit receives the rotational force thus to be orbitingly-moved by being engaged to a fixed scroll, thereby sucking, compressing, and discharging a refrigerant.

[8] In the reciprocating compressor, when the driving motor generates a driving force, a piston constituting the compression unit receives the driving force thus to be linearly- moved in a cylinder, thereby sucking, compressing, and discharging a refrigerant. In the reciprocating compressor, there is a method that the driving motor generates a rotational force and the rotational force is transmitted to a piston through a crank axis, and a method that the driving motor generates a linear reciprocation driving force and the linear reciprocation driving force is transmitted to a piston.

[9] According to said compressors, vibration and noise are generated in the driving motor and the compression unit disposed in the hermetic container in a process that a refrigerant is sucked, compressed, and discharged. When the vibration and noise are transmitted to the hermetic container, vibration and noise leaked to outside are increased thereby to lower a reliability. Therefore, many researches for restraining vibration and noise generated from the driving motor and the compression unit disposed in the hermetic container from being transmitted to the hermetic container are being performed, in which a technique using a spring is much applied.

[10] In case of applying the technique using a spring to a compressor, a transient state vibration is generated from the driving motor and the compression unit, and the driving motor and the compression unit collide with the hermetic container when a compressor is mounted at a refrigerator or an air conditioner or a refrigerator or an air conditioner at which a compressor has been mounted is moved, thereby causing a damage of components and generating a collision noise.

[11] In case of a refrigerator or an air conditioner, a size of a compressor that is mounted in the refrigerator or the air conditioner is designed to be minimum in order to minimize an installation area of the compressor. In order to minimize an appearance of the compressor, a size of the hermetic container forming the appearance is minimized. Herein, the driving motor and the compression unit disposed in the hermetic container have a certain size according to a capacity, so that an interval between the hermetic container and the driving motor and the compression unit disposed in the hermetic container becomes so small. According to this, a collision between the hermetic container and the driving motor and the compression unit is generated even by a small vibration of the driving motor and the compression unit.

[12] As one embodiment for preventing a collision between the hermetic container and a compressing assembly including the driving motor and the compression unit, as shown in Figure 1, a compressing assembly 20 including the driving motor and the compression unit is disposed in the hermetic container 10, and springs 30 are mounted between a lower portion of the compressing assembly 20 and a lower surface of the hermetic container 10. The springs 30 are coil springs, and both sides of the springs 30 are respectively engaged to mounting units 11 protruding from the lower surface of inside of the hermetic container 10 and mounting units 21 protruding from the lower portion of the compressing assembly 20. [13] Also, a plurality of bar type stoppers 40 bent at inner side surfaces of the hermetic container 10 are fixedly engaged to lateral portions of the compressing assembly 20. The bar type stoppers 40 are engaged to an inner wall of the hermetic container 10 by a welding so as to be disposed at both sides of the compressing assembly 20.

[14] Unexplained reference numerals 12 and 13 respectively denote a suction pipe and a discharge pipe.

[15] According to said structure, when the compressor is operated or the compressor is moved, the compressing assembly 20 vibrates under a state of being elastically supported by the springs 30. When the compressing assembly 20 generates a transient state vibration, the compressing assembly 20 collides with the bar type stoppers 40 thereby to prevent the compressing assembly 20 from colliding with the hermetic container 10.

[16] However, according to said structure, it is complicated to respectively engage the bar type stoppers 40 to preset positions inside the hermetic container 10, and the number of assembly processes is increased. Disclosure

[17] Therefore, an object of the present invention is to provide a stopper of a compressor capable of preventing a collision between a compressing assembly disposed in a hermetic container for compressing gas by generating a driving force and the hermetic container.

[18] Another object of the present invention is to provide a stopper of a compressor capable of simplifying a structure and an assembly process.

[19] 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 stopper of a compressor comprising: a hermetic container having a predetermined inner space; a compressing assembly disposed in the hermetic container for compressing gas by a driving force of a driving motor; and an elastic supporting means mounted between the hermetic container and the compressing assembly for elastically supporting the compressing assembly, the stopper comprises a movement limiting means provided at the hermetic container and the compressing assembly for limiting a movement of the compressing assembly in horizontal and vertical directions.

[20] 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 aocompanying drawings. Description of Drawings [21] Figure 1 is a sectional view of a compressor provided with a stopper in accordance with the conventional art; [22] Figure 2 is a sectional view of a compressor provided with a stopper according to one embodiment of the present invention; [23] Figures 3 and 4 are sectional views respectively showing an engagement structure of a position setting pin constituting the stopper of the compressor; [24] Figure 5 is a sectional view showing a compressor provided with a stopper according to another embodiment of the present invention; [25] Figure 6 is a sectional view showing an engagement structure of a position setting pin constituting the stopper of the compressor; [26] Figure 7 is a sectional view of a compressor provided with a stopper according to still another embodiment of the present invention; [27] Figure 8 is a sectional view showing yet another embodiment of the stopper of the compressor according to the present invention; and [28] Figure 9 is a sectional view showing an operational state of the stopper of the compressor according to the present invention. Mode for Invention [29] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. [30] Hereinafter, a stopper of a compressor according to the present invention will be explained. [31] First, one embodiment of the stopper of the compressor according to the present invention will be explained. [32] Figure 2 is a front section view of a compressor provided with a stopper according to one embodiment of the present invention. [33] As shown, the compressor comprises: a hermetic container 10 having a predetermined inner space; a compressing assembly 20 disposed in the hermetic container 10 for compressing gas by a driving force of a driving motor; and an elastic supporting means mounted between the hermetic container 10 and the compressing assembly 20 for elastically supporting the compressing assembly 20. [34] Also, a movement limiting means for limiting a movement of the compressing assembly 20 in horizontal and vertical directions is provided at the hermetic container 10 and the compressing assembly 20. [35] A suction pipe 12 for sucking a refrigerant and a discharge pipe 13 for discharging a refrigerant are respectively engaged to the hermetic container 10. [36] The compressing assembly 20 includes a driving motor for generating a driving force, and a compression unit for compressing a refrigerant by receiving a driving force of the driving motor.

[37] The elastic supporting means includes a plurality of mounting units 11 formed at a lower surface of inside of the hermetic container 10; a plurality of mounting units 21 formed at a lower surface of the compressing assembly 20 disposed in the hermetic container 10; and springs 30 respectively engaged to the mounting units 11 of the hermetic container and the mounting units 21 of the compressing assembly.

[38] The springs 30 are coil springs.

[39] The mounting units 11 of the hermetic container and the mounting units 21 of the compressing assembly are disposed to face each other with a certain interval, and both sides of the springs 30 are respectively engaged to the mounting units 11 of the hermetic container and the mounting units 21 of the compressing assembly.

[40] The movement limiting means includes a hemispherical cap 50 formed as a hemisphere shape and fixed to the hermetic container 10; and a position setting pin 60 having a certain length and of which one side is fixedly engaged to the compressing assembly 20 and another side is disposed inside the hemispherical cap 50.

[41] The hemispherical cap 50 is formed as a hemisphere shape having a certain thickness and an inner diameter. The hemispherical cap 50 has an opened side towards the compressing assembly 20, and the opposite side of the opened side is fixedly engaged to an inner wall of the hermetic container 10. The hemispherical cap 50 is preferably engaged to the inner wall by a welding method.

[42] As shown in Figure 3, the position setting pin 60 is engaged to one side of the compressing assembly 20 by a screw. That is, a screw thread is formed at one side of the position setting pin 60, and a screw thread is formed at one side of the compressing assembly 20 by a tap. The screw thread of the position setting pin 60 is engaged to the screw thread of the compressing assembly 20.

[43] As shown in Figure 4, the position setting pin 60 can be extendingly-formed from one side of the compressing assembly 20.

[44] The hemispherical cap 50 and the position setting pin 60 are disposed at the opposite side of the elastic supporting means.

[45] Even if the hemispherical cap 50 and the position setting pin 60 can be engaged to arbitrary positions, they are preferably disposed on a perpendicular line of a center of gravity of the compressing assembly 20.

[46] As a modification example of the hemispherical cap 50 and the position setting pin 60, a plurality of hemispherical caps 50 and a plurality of position setting pins 60 can be provided.

[47] As another embodiment of the movement limiting means, as shown in Figure 5, the movement limiting means includes a hemispherical cap 50 formed as a hemisphere shape and fixedly engaged to the compressing assembly 20, and a position setting pin 60 having a certain length and of which one side is fixedly engaged to the inner wall of the hermetic container 10 and another side is disposed inside the hemispherical cap 50.

[48] The hemispherical cap 50 is formed as a hemisphere shape having a certain thickness and an inner diameter. The opposite side of an opened side of the hemispherical cap 50 is fixedly engaged to the compressing assembly 20. The hemispherical cap 50 is preferably engaged to the compressing assembly by a welding method.

[49] The position setting pin 60 is engaged to the inner wall of the hermetic container 10 by a welding method.

[50] As shown in Figure 6, the position setting pint 60 can be engaged to the hermetic container 10 by a screw. That is, a through hole is formed at the hermetic container 10, a screw thread is formed at the through hole by a tap, and a screw thread is formed at one side of the position setting pin 60. Also, the screw thread of the position setting pin 60 is engaged to the screw thread of the hermetic container 10.

[51] The hemispherical cap 50 and the position setting pin 60 are disposed on a perpendicular line of a center of gravity of the compressing assembly 20.

[52] The hemispherical cap 50 and the position setting pin 60 are disposed at the opposite side of the elastic supporting means.

[53] As another embodiment of the movement limiting means, as shown in Figure 7, the movement limiting means includes a guide groove 22 concaved toward an inner side of the compressing assembly 20 with a certain depth; and a position setting pin 60 having a certain length and of which one side is fixedly engaged to the hermetic container 10 and another side is disposed inside the guide groove 22.

[54] A shape of a sectional surface of the guide groove 22 is a circle. The sectional surface of the guide groove 22 can have various shapes.

[55] The position setting pin 60 is engaged to the inner wall of the hermetic container 10 by a welding method.

[56] Also, the position setting pin 60 can be engaged to the hermetic container 10 by a screw.

[57] The guide groove 22 and the position setting pin 60 are disposed at the opposite side of the elastic supporting means.

[58] Even if the guide groove 22 and the position setting pin 60 can be disposed at arbitrary positions, they are preferably disposed on a perpendicular line of a center of gravity of the compressing assembly 20.

[59] It is also possible that a plurality of guide grooves 22 and a plurality of position setting pins 60 are provided.

[60] As another embodiment of the movement limiting means, as shown in Figure 8, the movement limiting means includes a cylindrical cap 70 formed as a cylindrical shape having a certain length and fixed to the inner wall of the hermetic container 10; and a position setting pin 60 having a certain length and of which one side is fixedly engaged to the compressing assembly 20 and another side is disposed inside the cylindrical cap 70.

[61] The cylindrical cap 70 can be fixedly engaged to the compressing assembly 20, and the position setting pin 60 can be fixedly engaged to the hermetic container 10.

[62] A shape that covers the position setting pin 60 can be variously implemented, and a shape of the position setting pin 60 can be also variously implemented.

[63] Hereinafter, operation of the stopper of the compressor according to the present invention will be explained.

[64] First, if a power is supplied to the compressor, the driving motor constituting the compressing assembly 20 is driven thus to generate a driving force. The driving force is transmitted to the compression unit. The compression unit receives the driving force of the driving motor thus to suck, compress, and discharge a refrigerant. At this time, the refrigerant is sucked into the compression unit through the suction pipe 12, and the compresses refrigerant is discharged through the discharge pipe 13.

[65] During the above process, vibration is generated from the compressing assembly 20 constituted with the driving motor and the compression unit, and the vibration is absorbed by the elastic supporting means thus to be prevented from being transmitted to the hermetic container 10. Also, when a transient state vibration is generated from the compressing assembly 20, a shake of the compressing assembly 20 is restricted by the movement limiting means thereby to prevent a collision between the compressing assembly 20 and the hermetic container 10.

[66] Especially, in case that the compressor is moved or a refrigerator or an air conditioner in which a compressor is mounted is moved, the compressing assembly 20 disposed inside the hermetic container 10 of the compressor vibrates under a state of being supported by the elastic supporting means. In this case, too, a shake of the compressing assembly 20 is restricted by the movement limiting means thereby to prevent a collision between the compressing assembly 20 and the hermetic container 10.

[67] IV re specifically, in case that the movement limiting means is constituted with the hemispherical cap 50 and the position setting pin 60, if the compressing assembly 20 vibrates, the position setting pin 60 disposed inside the hemispherical cap 50 collides with the inner wall of the hemispherical cap 50 thereby to prevent the compressing assembly 20 from colliding with the hermetic container 10.

[68] Also, in case that the movement limiting means is constituted with the guide groove 22 and the position setting pin 60, if the compressing assembly 20 vibrates, the position setting pin 60 disposed inside the guide groove 22 collides with the inner wall of the guide groove 22 thereby to prevent a collision between the compressing assembly 20 and the hermetic container 10.

[69] Additionally, in case that the movement limiting means is constituted with the cylindrical cap 70 and the position setting pin 60, if the compressing assembly 20 vibrates, a shake of the compressing assembly 20 is restricted by the cylindrical cap 70 and the position setting pin 60 thereby to prevent a collision between the compressing assembly 20 and the hermetic container 10.

[70] In the stopper of the compressor according to the present invention, as shown in Figure 9, even if the compressing assembly 20 vibrates in all directions (in drawing) including a vertical direction and a horizontal direction, the movement of the compressing assembly 20 is restricted. Herein, a downward movement of the compressing assembly 20 is restricted by the elastic supporting means.

[71] Also, according to the present invention, a structure and construction components are simplified, and the number of assembly processors is decreased.

[72] As aforementioned, in the stopper of the compressor according to the present invention, the compressing assembly disposed inside the hermetic container is prevented from colliding with the hermetic container thus to prevent a damage of components and to reduce an occurrence of collision noise, thereby enhancing a reliability. Also, since the structure and construction components are simplified and the number of assembly processors is decreased, a fabrication cost is reduced and a productivity is enhanced.

[73] 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 de- scription, 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 stopper of a compressor comprising: a hermetic container having a predetermined inner space; a compressing assembly disposed in the hermetic container for compressing gas by a driving force of a driving motor; and an elastic supporting means mounted between the hermetic container and the compressing assembly for elastically supporting the compressing assembly, the stopper comprising: a movement limiting means provided at the hermetic container and the compressing assembly for limiting a movement of the compressing assembly in horizontal and vertical directions. [2] The stopper of a compressor of claim 1, wherein the movement limiting means includes: a hemispherical cap formed as a hemisphere shape and fixed to the hermetic container; and a position setting pin having a certain length and of which one side is fixedly engaged to the compressing assembly and another side is disposed inside the hemispherical cap. [3] The stopper of a compressor of claim 2, wherein the hemispherical cap and the position setting pin are disposed on a perpendicular line of a center of gravity of the compressing assembly. [4] The stopper of a compressor of claim 2, wherein the hemispherical cap and the position setting pin are disposed at an opposite side of the elastic supporting means. [5] The stopper of a compressor of claim 2, wherein the hemispherical cap is fixedly engaged to an inner wall of the hermetic container. [6] The stopper of a compressor of claim 2, wherein the position setting pin is ex- tendingly formed from the compressing assembly. [7] The stopper of a compressor of claim 2, wherein a plurality of the hemispherical caps and a plurality of the position setting pins are provided. [8] The stopper of a compressor of claim 1, wherein the movement limiting means includes: a hemispherical cap formed as a hemisphere shape and fixed to the compressing assembly; and a position setting pin having a certain length and of which one side is fixedly engaged to the hermetic container and another side is disposed inside the hemispherical cap. [9] The stopper of a compressor of claim 8, wherein the position setting pin is engaged to the hermetic container by being penetratingly-inserted. [10] The stopper of a compressor of claim 1, wherein the movement limiting means includes: a guide groove concaved toward an inner side of the compressing assembly with a certain depth; and a position setting pin having a certain length and of which one side is fixedly engaged to the hermetic container and another side is disposed inside the guide groove. [11] The stopper of a compressor of claim 10, wherein a sectional surface of the guide groove has a circle shape. [12] The stopper of a compressor of claim 10, wherein the guide groove and the position setting pin are disposed on a perpendicular line of a center of gravity of the compressing assembly. [13] The stopper of a compressor of claim 10, wherein the guide groove and the position setting pin are disposed at an opposite side of the elastic supporting means. [14] The stopper of a compressor of claim 10, wherein a plurality of the guide grooves and a plurality of the position setting pins are provided. [15] The stopper of a compressor of claim 1, wherein the movement limiting means includes: a cylindrical cap formed as a cylindrical shape having a certain length and fixed to an inner wall of the hermetic container; and a position setting pin having a certain length and of which one side is fixedly engaged to the compressing assembly and another side is disposed inside the cylindrical cap. [16] The stopper of a compressor of claim 15, wherein the cylindrical cap is fixedly engaged to the compressing assembly and the position setting pin is fixedly engaged to the hermetic container.