KR20060023277A - Hermetic compressor - Google Patents

Abstract

The present invention relates to a hermetic compressor, and an object of the present invention is to provide a hermetic compressor provided to improve the manufacturability and assemblability of the oil pickup member.

To this end, the hermetic compressor according to the present invention includes a compression unit for compressing the refrigerant; A driving unit providing compression power according to the compression of the refrigerant; A hermetically sealed container which seals the compression part and the driving part with the outside and has an oil receiving space at a bottom thereof; A rotating shaft provided to transmit the driving force of the driving unit to the compression unit and having an oil guiding flow path formed therein to guide the oil in the oil receiving space to the friction part of the compression unit and the rotating shaft; Including a cylindrical portion that is pressed into the rotating shaft to communicate the oil space and the oil guide flow path, and an oil pick-up member is provided integrally injected into the plate-shaped plate provided inside the cylindrical portion to promote the oil pick-up action It is composed.

Description

Hermetic Compressor

1 is a side cross-sectional view showing the overall structure of a hermetic compressor according to the present invention.

Figure 2 is an enlarged side cross-sectional view showing a state in which the oil pickup member of the hermetic compressor according to the present invention is separated from the rotating shaft.

Figure 3 is an enlarged side cross-sectional view showing a state in which the oil pickup member of the hermetic compressor according to the present invention is coupled to the rotating shaft.

4 is a perspective view showing the structure of an oil pick-up member of the hermetic compressor according to the present invention.

Explanation of symbols on the main parts of the drawings

1: sealed container 10: compression part

20: drive unit 30: rotating shaft

31: Oil guiding flow path 32: Communication hole

33: groove 34: indentation groove

40: oil accommodation space 50: oil pickup member

60: cylindrical part 61: press-fitting part

61a: indentation protrusion 62: sealing jaw                 

70: plate

The present invention relates to a hermetic compressor, and more particularly to a hermetic compressor having an oil pick-up member for guiding the oil of the bottom of the hermetic container to the compression portion and the friction portion of the rotating shaft. will be.

In general, a hermetic compressor used in a refrigeration cycle such as a refrigerator or an air conditioner forms an exterior through a hermetically sealed container. A compression unit for compressing a refrigerant is performed inside the hermetically sealed container, and a compression is performed according to the compression of the refrigerant. A driving unit providing power and a rotating shaft connecting the driving unit and the compression unit to transmit the driving force of the driving unit to the compression unit are installed. One side and the other side of the airtight container are compressed in the suction pipe and the compression unit for guiding the external refrigerant into the airtight container. A discharge tube for discharging the refrigerant to the outside of the sealed container is installed.

Accordingly, when the driving unit is driven, the compression unit receiving the driving force through the rotating shaft is operated, and thus the refrigerant outside the sealed container is transferred from the suction pipe to the compression unit and then pressurized and discharged from the compression unit, and thus the refrigerant discharged from the compression unit. Is discharged to the outside of the sealed container through the discharge tube, this process is repeated repeatedly and the compression of the refrigerant by the compressor is performed.

In addition, such a hermetic compressor is provided with a structure for supplying oil to the friction part of the compression part and the rotating shaft for the purpose of lubrication and cooling of the compression part and the friction part of the rotating shaft side, the oil supply structure is a sealed container so that the oil is filled An oil receiving space formed on the bottom surface, an oil guiding flow path formed inside the rotating shaft to guide the oil in the oil storage space to the friction portion of the compression part and the rotating shaft, and a lower end of the rotating shaft to communicate the oil guiding flow path and the oil receiving space. It is provided through a cylindrical oil pick-up member to be coupled.

Therefore, when the rotating shaft is rotated during the operation of the compressor, the oil of the oil receiving space by the centrifugal force of the rotating shaft is moved upward along the inner surface of the oil pick-up member and the oil guide flow path and supplied to the friction portion of the rotating shaft and the piston, The lubrication and cooling of the friction part of the compression part or the driving part is performed through the plate, and the inside of the oil pick-up member which is provided in a cylindrical shape forms a vortex between the inner circumferential surface of the oil pick-up member to promote the pick-up action of the oil. Oil pickup plate is installed.

On the other hand, the oil pick-up plate is pressed into the oil pick-up member so that both ends are respectively supported on the inner circumferential surface of the oil pick-up member, the oil pick-up member is in the state that the oil pick-up plate is pressed in the top of the oil guide passage The oil pick-up member is press-fitted into the press-in groove formed at the lower end of the rotation shaft to be connected to the rotation shaft, and the oil pick-up member is provided through a hard metal material so as to be press-fitted in the press-in groove.

However, in the conventional hermetic compressor, since the oil pick-up member is formed through a metal material having a low elasticity, since the oil pick-up member can be pressed into the rotary shaft only when there is little processing error, oil pick-up of the oil pick-up member requires a great precision. The manufacturing of the member was difficult, and there was a lot of inconvenience in assembling, such as installing the oil pick-up plate in the oil pick-up member before press-fitting the oil pick-up member to the rotating shaft.

The present invention is to solve such a problem, it is an object of the present invention to provide a hermetic compressor provided to improve the manufacturability and assembly of the oil pickup member.

The hermetic compressor according to the present invention for achieving the above object comprises a compression unit in which the compression of the refrigerant is performed; A driving unit providing compression power according to the compression of the refrigerant; A hermetically sealed container which seals the compression part and the driving part with the outside and has an oil receiving space at a bottom thereof; A rotating shaft provided to transmit the driving force of the driving unit to the compression unit and having an oil guiding flow path formed therein to guide the oil in the oil receiving space to the friction part of the compression unit and the rotating shaft; A cylindrical portion press-fitted to the rotary shaft to communicate the oil space with the oil guide passage, and an oil pick-up member formed by integrally injecting a plate-shaped plate portion provided inside the cylindrical portion to promote an oil pick-up action. It is characterized by.

And the lower end of the rotary shaft is formed with a pressing groove for pressing the cylindrical portion, the upper end of the cylindrical portion is provided with a press-fitting portion is pressed into the press-in groove, the outer surface of the entry portion along the circumferential direction of the cylindrical portion spaced apart from each other It is characterized in that the indentation projection protruding to be provided, the sealing jaw is provided in the cylindrical part on the lower side of the indentation portion to seal between the cylindrical portion and the indentation groove.

In addition, the sealing jaw is characterized in that it is formed to protrude to have a band-shaped along the circumferential direction of the cylindrical portion is provided to be caught on the rotation axis of the inlet side of the press-in groove.

In addition, the indentation protrusion is characterized in that provided along the vertical direction of the cylindrical portion.

In addition, the outer diameter of the indentation portion including the indentation projection is characterized in that it is provided larger than the inner diameter of the insertion groove.

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

As shown in FIG. 1, the compressor according to the present invention forms its appearance through an airtight container 1 formed by combining an upper container 1a and a lower container 1b, and inside the sealed container. Compressor 10 to compress the refrigerant, the driver 20 to provide the compression power according to the compression of the refrigerant, and the drive unit 20 and the compression to transfer the driving force of the drive unit 20 to the compression unit 10 Rotating shaft 30 connecting the unit 10 is installed, and on one side and the other side of the sealed container (1) compressed by the suction pipe (2) and the compression unit 10 for guiding the external refrigerant into the sealed container (1) A discharge tube 3 for discharging the coolant outside the sealed container 1 is provided.

The double compression unit 10 includes a cylinder block 11 in which a compression chamber 11a is formed to compress the refrigerant, a piston 12 linearly reciprocating in the compression chamber 11a and performing a compression action of the refrigerant, and compression A cylinder head 13 coupled to one side of the cylinder block 11 to seal the chamber 11a and having a refrigerant discharge chamber 13a and a refrigerant suction chamber 13b partitioned therein, and the cylinder block 11 and the cylinder head 13. And a valve device 14 for intermittent flow of the refrigerant sucked into the compression chamber 11a from the refrigerant suction chamber 13b or discharged from the compression chamber 11a to the refrigerant discharge chamber 13a. .

In addition, the drive unit 20 provides a driving force to allow the piston 12 to reciprocate in the compression chamber 11a. The stator 21 and the stator 21 fixed inside the sealed container 1 are provided. It is provided in the interior of the rotor having a rotor 22 which electromagnetically interacts with the stator 21, the rotary shaft 30 is rotated in conjunction with such a rotor 22, the lower portion of the rotation The eccentric portion 23 and the eccentric portion, which are press-fitted into the electron 22 and the upper portion thereof is rotatably supported by the shaft support portion 11b formed at the lower portion of the cylinder block 11, and eccentrically rotated on the upper portion of the rotating shaft 30. One end is rotatably coupled to the eccentric portion 23 and the other end is provided with a connecting rod 24 installed to rotate and linearly move the piston 12 so that the eccentric rotation of the 23 can be converted into linear movement. . For reference, reference numeral 4 is a suction muffler installed between the compression chamber 11a and the suction pipe 2 to reduce the flow noise of the refrigerant sucked from the suction pipe 2 into the compression chamber 11a.

Therefore, in the hermetic compressor having such a structure, when the rotating shaft 30 is rotated together with the rotor 22 by the electrical interaction between the stator 21 and the rotor 22 according to the power applied, the eccentric 23 And the piston 12 connected through the connecting rod 24 perform a linear reciprocating motion inside the compression chamber 11a, through which the refrigerant outside the sealed container 1 is discharged from the suction pipe 2 to the cylinder head 13. After flowing into the refrigerant suction chamber 13b, the refrigerant is delivered to the compression chamber 11a and compressed inside the compression chamber 11a. The refrigerant compressed in the compression chamber 11a is again supplied to the refrigerant discharge chamber of the cylinder head 13. After being discharged to 13a, it is discharged to the outside of the sealed container 1 through the discharge tube 3, and this process is repeated and the compression of the refrigerant through the compressor is performed.

On the other hand, the bottom surface of the sealed container (1) is formed with an oil receiving space 40 is filled with oil, inside the rotary shaft 30 between the rotary shaft 30 and the shaft support (11b) or the compression chamber (11a) and the piston An oil guide flow passage 31 for guiding oil in the oil receiving space 40 to the frictional portion between the compression section 10 and the rotary shaft 30, etc. is provided between the 12 and the outer surface of the rotary shaft 30. A plurality of communication holes 32 and grooves 33, etc., formed to communicate with the guide passage 31 are formed, and the oil receiving space 40 and the oil guide passage 31 communicate with each other at the lower end of the rotating shaft 30. A cylindrical oil pick-up member 50 is provided.

And when the rotary shaft 30 is rotated when the compressor is driven through the oil supply structure, the oil in the oil receiving space 40 by the centrifugal force of the rotary shaft 30 is the oil pickup member 50 and the oil guide flow path ( 31 is moved upward along the inner surface of the 31 and supplied to the friction portion of the compression unit 10 and the rotating shaft 30 through the respective communication holes 32 and grooves 33, and thus the compression unit 10 by oil ) And the lubrication action and cooling action of the friction portion of the rotating shaft 30 side.

In addition, the oil pick-up member 50, as shown in detail in Figures 2 to 4, so that the upper end is pressed into the lower end of the rotary shaft 30 to communicate the oil receiving space 40 and the oil guide flow path (31). The plate-shaped provided inside the cylindrical portion 60 to form an vortex between the cylindrical cylindrical portion 60 and the inner peripheral surface of the cylindrical portion 60 to promote the oil pumping action of the oil pickup member 50. It includes a plate portion 70, the cylindrical portion 60 and the plate portion 70 is provided integrally injected.

Here, the plate portion 70 is formed to connect between the inner surface of one side of the cylindrical portion 60 to perform the function of the oil pick-up plate that is provided to be pressed into the conventional oil pick-up member, the plate portion 70 is The oil pick-up member 50 according to the present invention, which is integrally injected with the cylindrical part 60, does not need to press-fit the plate part 70 to the cylindrical part 60 when assembled to the rotary shaft 30. Is improved. In addition, since the oil pick-up member 50 is made of an injection molding having a large elastic force compared to the metal material, even if a machining error occurs to some extent, the oil pick-up member 50 may be press-fitted to the rotating shaft 30 by the elastic force, so that the operation accuracy is greatly required. The manufacturability can be improved as well.

In addition, a press-fitting groove 34 formed to communicate with the oil guide passage 31 is formed at a lower end of the rotary shaft 30 so that the cylindrical part 60 is press-fitted, and the press-fitting groove 34 is formed at the upper end of the cylindrical part 60. A press-fitting part 61 press-fitted therein is formed. On the outer surface of the press-fitting part 61, a press-fitting protrusion 61a provided to protrude along the vertical direction of the cylindrical part 60 is formed.

The indentation protrusion 61a is formed in plural so as to be spaced apart from each other by a predetermined interval along the circumferential direction of the cylindrical portion 60, and the indentation protrusion 61a is such that the indentation portion 61 can be forcibly pressed into the indentation groove 34. The outer diameter of the indentation portion 61 including the indentation protrusion 61a is provided to be formed to be somewhat larger than the inner diameter of the indentation groove 34 within the range, the oil pick-up member is produced as an injection through the indentation projection (61a) 50 can be strongly press-fitted into the press-in groove 34 over the conventional oil pick-up member formed of a metal material.

In addition, the lower end cylindrical part 60 of the press-fitting part 61 is formed to protrude to have a band shape along the circumferential direction of the cylindrical part 60 to seal between the cylindrical part 60 and the press-fitting groove 34. 62 is provided.

The closed jaw 62 presses the press-in part 61 into the press-in groove 34 and at the same time the upper end thereof is caught by the inlet-side rotation shaft 30 of the press-in groove 34 and the cylindrical part 60 and the press-in groove ( 34) is sealed between the sealing jaw (62) blocks the oil leakage and air inflow so that air or oil does not flow through the indentation projections (61a) formed for the solid fastening of the oil pickup member (50). In order to prevent the oil pumping force of the oil pickup member 50 from being lowered.

Next will be described with respect to the operation of the hermetic compressor according to the present invention configured as described above and the resulting effects.

First, when the rotating shaft 30 is rotated together with the rotor 22 by the electrical interaction between the stator 21 and the rotor 22 according to power application, the eccentric 23 and the connecting rod 24 are rotated. Piston 12 connected through the linear reciprocating motion in the compression chamber (11a), through which the refrigerant outside the sealed container (1) passing through the suction muffler (4) from the suction pipe (2) is somewhat reduced noise After entering the refrigerant suction chamber 13b of the cylinder head 13 in a state, it is delivered to the compression chamber 11a and compressed in the compression chamber 11a, and the refrigerant compressed in the compression chamber 11a is again a cylinder. After the discharge to the refrigerant discharge chamber (13a) of the head 13 is discharged to the outside of the sealed container 1 through the discharge pipe (3), this process is repeated and the compression of the refrigerant through the compressor is performed.

In addition, during operation of the compressor, the oil in the oil receiving space 40 is caused by the centrifugal force caused by the rotation of the rotary shaft 30 along the inner surface of the cylindrical portion 60 and the oil guide passage 31 of the oil pickup member 50. It is moved upward and supplied to the friction part of the compression unit 10 and the rotation shaft 30 through the respective communication holes 32 and grooves 33, and by the oil of the compression unit 10 and the rotation shaft 30 The lubrication action and the cooling action are performed on the friction part, and the plate part 70 of the oil pick-up member 50 forms a vortex between the inner surface of the cylindrical part 60 and the oil pick-up action is further promoted. To help.

 In the hermetic compressor according to the present invention, as the cylindrical portion 60 and the plate portion 70 constituting the oil pick-up member 50 are integrally injected, the oil pick-up member 50 may be assembled to the rotary shaft 30. In this case, the plate portion 70 does not need to be press-fitted to the cylindrical portion 60, so that the assembly performance of the oil pick-up member 50 is improved, and the oil pick-up member 50 has an injection product having a large elastic force compared to the metal material. Even if the processing error occurs to some extent as produced by the elastic force can be pressed into the rotary shaft 30, the manufacturability is also improved.

In addition, the oil pick-up member 50 provided with the injection molded product is provided with a pressurizing protrusion 61a provided at the press-in part 61 of the cylindrical part 60 and a sealing jaw 62 provided at the lower side of the press-in part 61. Through it can be strongly pressed into the pressing groove 34 of the rotating shaft 30 without lowering the oil pumping force.

As described above in detail, the hermetic compressor according to the present invention integrally integrates a cylindrical portion communicating the oil storage space and the oil guiding flow passage constituting the oil pick-up member with a plate portion installed in the cylindrical portion to promote the oil pumping action. When the oil pick-up member is assembled to the rotary shaft, it is not necessary to press-fix the plate part to the cylindrical part, thereby improving the assembly of the oil pick-up member, and the oil pick-up member has an injection material having a large elastic force compared to the metal material. Even if the processing error occurs to some extent, the elasticity can be pressed into the rotating shaft by the elastic force, so the manufacturability is also improved.

Claims (5)

A compression unit to compress the refrigerant; A driving unit providing compression power according to the compression of the refrigerant; A hermetically sealed container which seals the compression part and the driving part with the outside and has an oil receiving space at a bottom thereof; A rotating shaft provided to transmit the driving force of the driving unit to the compression unit and having an oil guiding flow path formed therein to guide the oil in the oil receiving space to the friction part of the compression unit and the rotating shaft; A cylindrical portion press-fitted to the rotary shaft to communicate the oil space with the oil guide passage, and an oil pick-up member formed by integrally injecting a plate-shaped plate portion provided inside the cylindrical portion to promote an oil pick-up action. Hermetic compressor, characterized in that. The method of claim 1, A press-fitting groove for press-fitting the cylindrical part is formed at the lower end of the rotary shaft, and a press-fitting part press-fitted into the press-fitting groove is provided at the upper end of the cylindrical part. The outer surface of the inlet part is provided with a press-in projection projecting to be spaced apart from each other by a predetermined interval along the circumferential direction of the cylindrical portion, the lower end of the press-in portion is provided with a sealing jaw to seal between the cylindrical portion and the press-in groove. Hermetic compressor. The method of claim 2, The hermetic jaw is formed to protrude in a circumferential direction in the circumferential direction of the cylindrical portion is hermetic compressor characterized in that it is provided to be caught on the rotation axis of the inlet side of the pressing groove. The method of claim 2, The press-fit projection is a hermetic compressor, characterized in that provided along the vertical direction of the cylindrical portion. The method of claim 2, The closed compressor, characterized in that the outer diameter of the indentation portion including the indentation protrusion is provided larger than the inner diameter of the insertion groove.

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