KR100202916B1 - A cooling device of compressor using heat pipe - Google Patents

Abstract

The present invention relates to a compressor cooling apparatus using a heat pipe that improves compressor performance by providing a heat pipe in a high-pressure generating unit in a hermetic compressor of a refrigerator.

This apparatus is characterized in that the compressor (10) for refrigerator having means for compressing the refrigerant by reciprocating the piston (14) in the cylinder (13) by the action of the eccentric shaft (12) inside the enclosure (11) A plurality of evaporating parts 21 surrounding the outside of the cylinder 13 are provided in the case 11 and a condensing part 22 is connected to the upper part of the evaporating part 21 to form a closed case 11), and a plurality of heat transfer fins (22a) are provided on the surface of the condensing portion (22); The evaporator 21 and the condenser 22 constitute a predetermined heat pipe 20 and dissipate the heat of compression generated in the cylinder 13.

Accordingly, in the hermetic compressor of the refrigerator having the means for sucking and discharging the refrigerant into the sealed case, the heat pipe is installed in the high-pressure generating portion, so that the refrigerant performs the isothermal compression process to improve the performance of the compressor .

Description

Compressor cooling system using heat pipe

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, and more particularly, to a hermetic compressor of a refrigerator having a means for sucking and discharging a refrigerant into a closed casing, a heat pipe is installed in a high- And more particularly to a compressor cooling apparatus using a heat pipe for improving the performance of the compressor.

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 the liquid refrigerant is vaporized in the cooler, one refrigeration cycle is completed.

1 shows an internal construction diagram schematically showing a hermetic compressor.

The compressor 10 has a structure in which a suction pipe (not shown) and a discharge pipe (not shown) of a refrigerant are connected to the outside of the closed casing 11, and a high-pressure generating unit and a motor unit are installed inside. The high pressure generating portion can be roughly divided into a cylinder 13, a piston 14 and a valve 15. The motor portion can be roughly divided into a stator 18 and a rotor 19. The high pressure generating portion includes a motor portion And an eccentric shaft (12).

The cylinder 13, the piston 14, the valve 15, the discharge muffler 16 and the like are formed as an integral assembly and supported on the frame 17. The frame 17 also serves as a bushing for rotatably supporting the eccentric shaft 12 on which the rotor 19 is mounted.

In operation, the eccentric shaft 12, which is rotated by the motor, induces cam movement of the eccentric cam at its upper portion, and the cam movement again reciprocates the piston 14 in the cylinder 13 through the connecting rod, (15) is opened and closed by the pressure difference between both sides formed at this time to move the refrigerant in one direction.

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

When the refrigerant in the cylinder 13 performs an ideal isothermal compression process, the COP reaches approximately 2.7. However, in practice, when the refrigerant in the cylinder 13 performs the isothermal compression process or the polytropic compression process While the COP is about 1.5.

The reason why the COP is lowered is that the adiabatic compression or polytropic compression increases the work required for compression (that is, the compression date) compared to the isothermal compression. Therefore, in order to improve the COP, It is necessary to release it.

Accordingly, it is an object of the present invention to provide a hermetically sealed compressor of a refrigerator having a means for sucking and discharging a refrigerant into a sealed case, and a heat pipe is installed in a high-pressure generating portion to reduce a compression work, And an object thereof is to provide a device.

FIG. 1 is an internal schematic view schematically showing a hermetic compressor. FIG.

FIG. 2 is a front view showing a cooling device according to the present invention; FIG.

FIG. 3 is a cross-sectional view illustrating a heat pipe of FIG. 2; 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

20: Heat pipe 21: Evaporator

22: condensing part 22a: electrothermal fin

31: copper tube 32: inner tube

33: working fluid

In order to achieve this object, the present invention provides a refrigerator compressor (10) having a means for reciprocating a piston (14) in a cylinder (13) by the action of an eccentric shaft (12) A plurality of evaporator portions 21 surrounding the outside of the cylinder 13 are provided in the inside of the closed case 11 and a condenser portion 22 is provided at a place where the upper portion of the evaporator portion 21 is integrated into one, And a plurality of heat conducting fins 22a are provided on the surface of the condensing section 22, Wherein the evaporator (21) and the condenser (22) constitute a predetermined heat pipe (20) and heat the compressed heat generated in the cylinder (13).

At this time, the evaporator 21 of the heat pipe 20 may be inserted into the wall of the cylinder 13 instead of being wound on the outside of the cylinder 13.

The heat pipe 20 includes a copper tube 31 molded into a completely sealed structure using a material having a good thermal conductivity and an inner tube 31 having a mesh structure mounted with a small clearance inward of the copper tube 31 (32), and a working fluid (33) filled in the copper tube (31).

[Example]

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows a front view showing the cooling device according to the present invention.

The present invention is applied to a compressor for a refrigerator (10) having means for compressing a refrigerant by reciprocating a piston (14) in a cylinder (13) by the action of an eccentric shaft (12) in a closed casing (11).

And a plurality of evaporating parts 21 surrounding the outside of the cylinder 13 are installed in the closed case 11. [ The evaporator 21 is composed of a plurality of tubes which are branched from a tube disposed on the upper surface of the cylinder 13 and must contact the outside of the cylinder 13 and evenly cover it. In order to increase the contact area with the cylinder 13, it is desirable to reduce the diameter of the evaporator 21 and increase the water quantity.

At this time, the evaporator 21 of the heat pipe 20 may be inserted into the wall of the cylinder 13 instead of being wound on the outside of the cylinder 13.

The installation on the wall of the cylinder 13 is more difficult to manufacture, but the object of the present invention can be accomplished more effectively. In this case as well, it is preferable to reduce the diameter of the evaporator 21 and increase the water volume to increase the contact area with the cylinder 13.

The condenser 22 is connected to the upper portion of the evaporator 21 and is drawn out to the outside of the upper side of the enclosure 11.

Since the condensing part 22 is a part for discharging the heat from the evaporator 21 to the outside, the condenser 22 is drawn out to the outside without being placed inside the closed case 11 in which the high temperature is formed, and a bracket (not shown) .

In this embodiment, the condenser 22 is provided in the cold air flow path of the refrigerator. However, when the amount of heat radiation from the condenser 22 is large, it is preferable to guide the refrigerant to the outside of the cool air flow path by using more brackets .

On the other hand, a plurality of heat transfer fins 22a are provided on the surface of the condenser 22. The heat transfer fin 22a is formed to increase the amount of heat radiation by increasing the heat exchange area between the condenser 22 and the outside air, and is uniformly formed of the same material as the condenser 22. When a cooling fan (not shown) is provided in the heat transfer fin 22a and forced cooling is performed, the heat radiation amount is further increased.

It is preferable that a packing made of a heat resistant / chemical resistant rubber material is provided at a place where the condensing portion 22 and the sealing case 11 are in contact with each other. The vibration generated in the operating part such as the eccentric shaft 12 and the piston 14 is transmitted to the upper part of the rubber packing through the cylinder 13 and the evaporator 21 so that the condenser 22 and the sealing case 11 It is possible to prevent the refrigerant from leaking out of the enclosure 11 only.

In this manner, the evaporator 21 and the condenser 22 constitute a predetermined heat pipe 20 and dissipate the heat of compression generated in the cylinder 13. The main structure of the heat pipe 20 is clearly shown in FIG. 3 .

3 is a cross-sectional view illustrating the heat pipe of FIG. 2; FIG.

The heat pipe 20 according to the present invention is constituted by a copper pipe 31, an inner pipe 32 and a working fluid 33 and is arranged so as to extend from the evaporator 21 to the condenser 22 .

The copper tube 31 is formed into a completely sealed structure by using a material having a good thermal conductivity.

The copper tube 31 may be made of a material such as aluminum having a good thermal conductivity, so that the airtightness is maintained in the evaporating portion 21 and the condensing portion 22 as well as the connecting portion thereof. In addition, the copper tube 31 is required to have a fatigue strength with respect to a relative displacement amount due to vibration of the sealing case 11 and the cylinder 13.

And an inner tube 32 of a mesh structure to be mounted when a minute gap is maintained inside the copper tube 31 is provided.

The inner tube 32 has a mesh structure in which a wire mesh is bent in the same shape as the copper tube 31. The inner tube 32 extends from the distal end of the evaporation portion 21 to the inner surface of the copper tube 31 It is inserted with maintaining a certain gap.

It is necessary to use the inner tube 32 integrally connected to the inner tube 32 at the connecting portion or the curved portion of the evaporator 21 and the condenser 22 so that the connection of the inner tube 32 is naturally natural, It is easy to maintain a certain gap with the inner surface of the copper tube 31 from the end of the portion 21 to the end of the condensing portion 22. [

At this time, a predetermined working fluid 33 is filled in the copper tube 31. The working fluid 33 uses a liquid which is vaporized in the intermediate portion 21 and is liable to be condensed in the condensing portion 22. In the present invention, during the normal operation of the compressor, the cylinder 13 ) Is maintained at 100 DEG C or higher, it is possible to use water.

In this manner, the copper tube 31, the inner tube 32, and the working fluid 33 constitute a predetermined heat pipe 20 and radiate heat of compression generated in the cylinder 13, Will be described with reference to FIGS.

The eccentric shaft 12 rotated by the motor induces the cam movement of the eccentric cam at its upper portion and the cam movement reciprocates the piston 14 in the cylinder 13 through the connecting rod again, The valve 15 is opened and closed by the pressure difference.

In this high-pressure generating unit, the refrigerant is charged into the closed casing 11 and then flows into the cylinder 13 through the suction muffler and is compressed and then sent to a condenser (not shown) through a discharge pipe. So that the cylinder 13 is heated.

During operation of the compressor, the cylinder 13 maintains a temperature equal to or higher than the boiling point of the water, so that the working fluid 33 absorbs the heat and becomes a vapor state. The working fluid 33 in this state flows into the center of the copper tube 31 and the inner tube 32 as indicated by an arrow in FIG. And conveys the heat of the cylinder 13 to the portion 22.

The working fluid 33 in the gaseous state reaching the upper end of the condensing section 22 is released and condensed and the working fluid 33 in the liquid state again flows through the gap between the copper tube 31 and the inner tube 32, Reaches the lower end of the evaporator (21) by tension.

The evaporating portion 21 is provided in the downward direction and the condensing portion 22 is provided in the upward direction in order to smooth the circulation of the working fluid 33. [

By using the heat pipe 20 forming the heat release circulation cycle of the working fluid 33 in the copper tube 31 as described above, the compression heat generated when the refrigerant is compressed is released to the outside air, And reduces compression days and compressor work.

This means that the input is reduced at the compression performance (COP) indicated by the refrigeration capacity / input, which means that the performance of the compressor is improved.

As described above, in the compressor cooling apparatus using the heat pipe of the present invention, the heat pipe is installed in the high-pressure generating unit in the hermetic compressor of the refrigerator having the means for sucking and discharging the refrigerant into the closed casing. So that the performance of the compressor can be improved by reducing the compression work.

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 know what is known in the art.

Claims (3)

A compressor (10) for a refrigerator having means for compressing a refrigerant by reciprocating a piston (14) in a cylinder (13) by the action of an eccentric shaft (12) in a sealed casing (11) A plurality of evaporating parts 21 surrounding the outside of the cylinder 13 are installed in the inside of the sealing case 11 and the condensing part 22 is connected to the upper part of the evaporating part 21, And a plurality of heat conducting fins (22a) are provided on the surface of the condensing section (22); Wherein the evaporator (21) and the condenser (22) constitute a predetermined heat pipe (20) and heat the compressed heat generated in the cylinder (13). The heat pipe according to claim 1, wherein the evaporator (21) of the heat pipe (20) is inserted into a wall of the cylinder (13) instead of being wound on the outside of the cylinder (13) Cooling device. The heat pipe (20) according to claim 1 or 2, wherein the heat pipe (20) has a copper tube (31) formed into a completely sealed structure using a material having a good thermal conductivity, and a small gap And a working fluid (33) filled in the inside of the copper tube (31).