KR19990003389U - Refrigerant pipe sealing device of hermetic compressor - Google Patents

Abstract

The present invention relates to a refrigerant pipe sealing device of a hermetic compressor, in particular, a suction pipe (11) for supplying a refrigerant into the compressor, a discharge pipe (12) for discharging the compressed refrigerant, and initially filling the refrigerant oil and refrigerant gas. The groove portion 14 is formed at one end of the refrigerant filling pipe 13, and the groove portion 14 is formed at the outer circumference of the insertion portion 21 of the sealing cap 20 inserted into the refrigerant pipes 11, 12, 13. By forming the fixing protrusion 22 corresponding to the), the sealing cap 20 is not easily separated from the refrigerant pipes 11, 12, 13, thereby preventing the compressor from shortening its life due to inflow of moisture or foreign matter. have.

Description

Refrigerant pipe sealing device of hermetic compressor

The present invention relates to a hermetic compressor, in particular, a suction pipe for supplying refrigerant gas into the compressor, a discharge pipe for discharging the compressed refrigerant gas, and a refrigerating oil at first, in order to prevent water or foreign substances from entering into the produced compressor. And it relates to a refrigerant pipe sealing device of the hermetic compressor for sealing the refrigerant filling pipe used when filling the refrigerant gas.

In general, a compressor is a device that raises the pressure and temperature to a saturation pressure corresponding to the condensation temperature so that the low-temperature and low-pressure refrigerant gas evaporated in the evaporator can be easily condensed and liquefied in the condenser.

These compressors include a reciprocating compressor that compresses a refrigerant using a reciprocating motion of a piston, a rotary compressor that rotates a compressor in a cylinder and compresses the refrigerant, and converts velocity energy into pressure energy using a centrifugal force of an impeller to compress the refrigerant. Turbo compressors;

Such a compressor is mounted on a refrigerating device to perform a refrigerating operation together with a condenser, an expansion valve, and an evaporator, that is, a function of taking heat around the evaporator by using latent heat of evaporation of the refrigerant.

In other words, when the compressor compresses the refrigerant and raises the pressure and temperature of the refrigerant to the saturation pressure, the condenser absorbs the heat of the high-temperature / high-pressure refrigerant using water or air to condense and liquefy the refrigerant. The refrigerant condensed and liquefied thus has a low temperature and pressure due to the throttling action of the expansion valve, and the refrigerant absorbs heat from the object to be cooled while the evaporator evaporates to perform a freezing action.

The domestic refrigerator compressor is mainly one-stage reciprocating type and is sealed in the case for soundproofing and dustproofing and installed at the bottom of the refrigerator. 2 and 3 show a side cross-sectional view and a plan view, respectively, of a conventional hermetic reciprocating compressor operating as described above.

As shown in the figure, the compression mechanism 120 and the drive motor 130 constituting the compressor 110 is hermetically received inside the case consisting of the upper case 141 and the lower case 142, the compression mechanism The 120 and the driving motor 130 are supported by the compression spring 150 or the leaf spring for vibration and soundproofing, and a frame 160 for coupling the compression mechanism 120 and the driving motor 130 to the case. It is supported by the support which is fixed to the inner wall of the.

On the other hand, the compression mechanism 120 embedded in the case (141, 142) is composed of a cylinder 121 fixed to the upper portion of the frame 160, and a piston 122 for reciprocating the inside of the cylinder 121, On one side of the cylinder 121, the suction and discharge valve assembly for supplying the refrigerant sucked through the suction muffler 125 into the cylinder 121 and the refrigerant compressed in the cylinder 121 to the discharge muffler 124 ( 123 is mounted.

The suction and discharge valve assembly 123 is composed of a flapper or lead-type thin plate structure which is generally elastic for miniaturization, and according to the pressure difference generated by the reciprocating motion of the piston 122. It is passively opened and closed to suck or discharge the refrigerant from inside the cylinder 121.

That is, when the piston 122 moves backward, low-temperature and low-pressure refrigerant is sucked into the cylinder 121 from the external evaporator through the suction pipe 171 and the suction muffler 125, and when the piston 122 moves forward, the high temperature The high pressure refrigerant is discharged from the inside of the cylinder 121 to the condenser through the discharge muffler 124 and the discharge pipe 172. At this time, the suction muffler 125 and the discharge muffler 124 is filled with the refrigerant to reduce the noise due to the pulsation of the pressure generated during the suction and discharge of the refrigerant.

On the other hand, the drive motor 130 is composed of a stator 131 is fixed to the lower portion of the frame 160, and the rotor 132 rotates with a predetermined gap with the stator 131, The electron 132 is rotatably supported by the frame 160 and is coupled to a rotating shaft 133 which rotates together with the rotor 132.

In addition, an eccentric shaft 134 is formed at the end of the rotating shaft 133 to protrude upward of the frame 160, and the eccentric shaft 134 is coupled to the piston 122 through the connecting rod 135 and the bearing. have. Therefore, the piston 122 reciprocates by the amount of rotation of the eccentric shaft 134 to compress the refrigerant.

In addition, a refrigerant filling pipe 173 for initially filling the refrigerant oil and the refrigerant gas into the cases 141 and 142 is installed at one surface for a smooth compression process as described above.

In addition, the lubricating oil is stored in the lower part of the case 142 for the smooth operation of the compression mechanism 120 and the driving motor 130, the lubricating oil supply groove (lubricating oil supply groove formed in the rotating shaft 133 during the rotation of the rotating shaft 133) ( 136 is suctioned to the top, and then sprayed in all directions, supplied to each lubrication portion, and flows downward again to be collected at the bottom of the case 142.

The suction pipe 171, the discharge pipe 172, and the refrigerant filling pipe 173 of the compressor operating as described above are sealed to prevent moisture or foreign matter from penetrating into the compressor until the compressor is mounted in the refrigerating device. That is, as illustrated in FIG. 3, the insertion pipes 181 of the rubber sealing cap 180 are inserted into the suction pipes 171, the discharge pipes 172, and the end portions of the refrigerant filling pipes 173 to cool the refrigerant pipes 171, 172, and 173. ) Is sealed.

However, in the conventional sealing device as described above, since the inserting portion 181 of the sealing cap 180 inserted into the refrigerant pipes 171, 172, 173 is formed in a straight line, the sealing cap may be a refrigerant pipe 171, 172, 173 even in the light impact generated during movement. If the lubricant is buried in the inner circumference of the refrigerant pipes (171, 172, 173) when the lubricant is injected, the insertion portion 181 of the sealing cap 180 tends to be more easily separated from the refrigerant pipes (171, 172, 173). There was this.

Therefore, the present invention is designed to solve the above problems, and the sealing cap is firmly fixed to the refrigerant pipe so that the sealing cap is not easily separated from the refrigerant pipe due to the impact generated during movement, so that moisture or It is an object of the present invention to provide a refrigerant pipe sealing device of a hermetic compressor which prevents foreign substances from entering.

In order to achieve the above object, the present invention is a general hermetic compressor, the suction pipe for supplying the refrigerant into the compressor, the discharge pipe for discharging the compressed refrigerant and the refrigerant filling pipe for initially filling the refrigerant oil and refrigerant gas A groove is formed at one end of the groove, and a fixing protrusion corresponding to the groove is formed at the outer periphery of the insertion part of the sealing cap inserted into the refrigerant pipe.

1 shows a hermetic compressor equipped with a refrigerant pipe sealing device according to the present invention

drawing,

2 is a side cross-sectional view of a typical hermetic compressor,

3 is a view showing a hermetic compressor equipped with a conventional refrigerant pipe sealing device.

Explanation of symbols for main parts of the drawings

10 case 11 suction pipe

12: discharge pipe 13: refrigerant filling pipe

14: groove 20: sealing cap

21: insertion portion 22: fixing protrusion

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

1 is a view showing a hermetic compressor equipped with a refrigerant pipe sealing device according to the present invention, a suction pipe 11 for supplying a refrigerant into the compressor, a discharge pipe 12 for discharging the compressed refrigerant, and an initial compressor. The refrigerant filling pipe 13 is welded to and coupled to the compressor case 10 so as to fill the refrigerator oil and the refrigerant gas so as to be smoothly driven.

One end of the refrigerant pipes (11, 12, 13) to extend the inner diameter to form the recessed portion 14 and the sealing cap 20 of the rubber material inserted into the refrigerant pipes (11, 12, 13) insertion portion 21 The outer periphery of the) is shown that the fixing projection 22 corresponding to the groove portion 14 is formed and fastened.

Therefore, when the sealing cap 20 is inserted into the refrigerant pipes 11, 12 and 13 of the produced compressor, the sealing cap 20 is formed in the recess 14 formed in the inner circumference of the refrigerant pipes 11, 12 and 13. The fixing protrusion 22 formed at the outer periphery is inserted and fixed as shown in the enlarged view shown in the dashed-dotted line of FIG. Even if this occurs, the sealing cap 20 does not escape from the refrigerant pipes 11, 12, 13.

In addition, even if lubricating oil is applied to the inner circumference of the refrigerant pipes 11, 12, and 13 by the refrigerant oil injected so that the compression works smoothly, the recess 14 and the fixing protrusion 22 are fastened. It is possible to prevent the departure easily.

As described above, the present invention provides a recessed groove at one end of the suction pipe, the discharge pipe, and the refrigerant filling pipe, and also forms a fixing protrusion corresponding to the recessed groove in the outer periphery of the sealing cap inserted into the refrigerant pipe. It can prevent the compressor's life shortening due to the inflow of water or foreign substances by not being easily separated from the refrigerant pipe.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible.

Therefore, the true technical protection scope of the present invention should be defined only by the scope of the attached utility model registration request.

Claims (1)

In a typical hermetic compressor, one end of a suction pipe 11 for supplying a refrigerant into the compressor, a discharge pipe 12 for discharging the compressed refrigerant, and a refrigerant filling pipe 13 for initially filling the refrigerant oil and the refrigerant gas The groove 14 is formed, and the fixing projection 22 corresponding to the groove 14 is formed on the outer circumference of the insertion portion 21 of the sealing cap 20 inserted into the refrigerant pipes 11, 12, 13. Refrigerant pipe sealing device of the hermetic compressor characterized in that it is formed.