KR20040071934A - Horizontal type compressor having pressure plate - Google Patents

Abstract

The present invention is mounted on the upper surface of the main bearing and formed in a shape having a predetermined space to attenuate the noise of the refrigerant, and is integrally extended from the muffler to the outside and in close contact with the upper surface of the main bearing to close the inside of the compressor It is divided into a high pressure chamber and a low pressure chamber, and the end portion thereof is composed of a differential pressure portion formed to have a predetermined gap with the outer edge of the main bearing so that the refrigerant can pass, thereby reducing the manufacturing cost by forming the differential pressure separating plate integrally with the muffler. It is possible to shorten the work process, and to improve the structure of the differential pressure separator to maintain a constant pressure difference in the compressor to provide a horizontal compressor that can improve the oil supply capacity.

Description

Horizontal compressor with differential pressure plate {HORIZONTAL TYPE COMPRESSOR HAVING PRESSURE PLATE}

The present invention relates to a horizontal compressor, and more particularly, to a horizontal compressor having a differential pressure separating plate capable of minimizing the amount of refrigerant oil flowing out of the compressor.

In general, a hermetic compressor is classified into a rotary compressor, a reciprocating compressor, a scroll compressor, and the like according to a method of compressing a fluid.

The rotary compressor compresses the fluid while the rolling piston rotates and rotates inside the cylinder, and is classified into a horizontal type installed horizontally and an upright type installed vertically according to the installation form.

1 is a cross-sectional view of a horizontal rotary compressor according to the prior art.

The horizontal rotary compressor according to the prior art includes a casing 102, a driving unit 104 embedded in the left side of the casing 102 to generate a rotational force, and a built-in rotary drive compressor 104 built in the right side of the casing 102. Compression unit 106 for compressing the refrigerant by the rotational force, and the lubrication unit 140 for supplying the oil filled in the lower surface of the casing 102 to each sliding part in the compressor.

The casing 102 is mounted on the left and right sides so that the first cover 110 and the second cover 108 are hermetically sealed, respectively, and a suction pipe 112 through which the refrigerant is sucked is connected to the side of the casing 102. The second cover 108 is connected to a discharge tube 114 through which the compressed refrigerant is discharged.

The driving unit 104 is fixed to the inside of the casing 102 and the power is applied from the outside, and is arranged at a predetermined interval inside the stator 116 to interact with the stator 120 Rotor 118 is rotated, and the rotating shaft 120 is fixed to the center of the rotor 118 is rotated together to transmit a rotational force to the compression unit 106.

The compression unit 106 includes a main bearing 122 and a sub bearing 124 mounted at predetermined intervals inside the casing 102 so as to rotatably support the rotating shaft 120, and the main bearing ( A cylinder 128 connected between the suction pipe 112 and the eccentric portion formed at one side of the rotating shaft 118 is formed between the 122 and the sub-bearing 124 to form a compression chamber 126 of a predetermined space and connected to the suction pipe 112 ( Rolling piston (130) rotatably fitted to the outer circumferential surface of the 132 and in contact with the inner surface of the compression chamber 126, and the vane (not shown) for partitioning the inside of the compression chamber 126 into a high pressure portion and a low pressure portion It consists of.

The main bearing 122 has a discharge port 136 through which the refrigerant compressed in the compression chamber 126 is discharged, and a refrigerant discharged from the discharge port 136 on the upper surface of the main bearing 122. The muffler 138 is reduced to reduce the noise of the.

The lubrication unit 140 supplies oil filled in the lower portion of the casing 102 by a predetermined level (L), and a portion of the refrigerant connected to one side of the sub bearing 124 and compressed in the compression chamber 126. A refrigerant pipe 142 that receives the oil supply pressure and is connected to an oil passage (not shown) formed in the rotary shaft 120 and is supplied to the oil passage by the pressure of the refrigerant discharged through the refrigerant pipe 142. It consists of an oil pipe 144 for supplying, the oil supplied to the oil pipe 144 delivers the oil through the oil passage to each sliding portion of the compressor inside.

The lubricated oil is discharged to the second cover 108 through a gap between the rotor 118 and the stator 116 like a refrigerant, and a part of the oil is connected to the second cover 108. It is discharged together with the refrigerant through the discharge pipe 114.

The operation of the horizontal rotary compressor according to the prior art configured as described above will be described below.

When power is applied to the stator 116, when the rotor 118 is rotated by the interaction of the stator 116 and the rotor 118, the rotating shaft 120 is rotated together with the rotor 118.

Then, as the rolling piston 130 rotates and revolves in the compression chamber 126, the refrigerant introduced into the compression chamber 126 through the suction pipe 112 is compressed. The refrigerant compressed in the compression chamber 126 is discharged through the discharge port 136, the noise is attenuated while passing through the muffler 138, and passes through the gap between the rotor 118 and the stator 116. 2 is discharged through the discharge pipe 114 connected to the cover (108).

In addition, the oil filled in the lower portion of the casing 102 is supplied to the oil pipe 144 by the pressure of the refrigerant discharged into the refrigerant pipe 142, and through the oil passage formed on the rotating shaft 120 to each sliding portion Supplied to lubricate.

Then, a part of the lubricated oil falls to the lower portion of the casing 102, and a part of the oil is discharged to the outside through the discharge pipe 114 through a gap between the rotor 118 and the stator 116 like the refrigerant. do.

In the horizontal rotary compressor according to the related art, the oil stored in the lower portion of the casing 102 is supplied to each sliding part inside the freezing chamber by the pressure of the refrigerant to lubricate, and a part of the oil that has completed the lubricating action is the casing ( 102 falls into the lower part of the compressor, and part of the compressor is discharged to the outside of the compressor through the discharge pipe 114 and the oil is insufficient in the compressor to cause wear of each sliding part, thereby shortening the life of the compressor. The problem of lowering the reliability of is generated.

In addition, in order to prevent the outflow of oil as described above, if a separate differential pressure separator is installed in order to generate a pressure difference inside the compressor, the manufacturing cost is increased and a process of installing the differential pressure separator in the assembly process is added, thus assembling process This is complicated and there is a problem of lowering work efficiency.

The present invention was created to solve the above problems of the prior art, an object of the present invention is to install a differential pressure separating plate between the compression unit and the drive unit to generate a pressure difference in the compressor to smoothly supply the refrigeration oil and the compressor The present invention provides a horizontal compressor capable of minimizing the amount of refrigeration oil flowing outward, thereby extending the life of the compressor and improving the reliability of the compressor.

Another object is to provide a horizontal compressor that can form a differential pressure plate integrally with the muffler to reduce the manufacturing cost and shorten the work process.

Another object is to provide a horizontal compressor that can improve the oil supply capacity by improving the structure of the differential pressure separator to maintain a constant pressure difference inside the compressor.

1 is a cross-sectional view of a horizontal compressor according to the prior art.

2 is a cross-sectional view of a horizontal compressor according to the present invention.

3 is a front view of the differential pressure separating plate of the horizontal compressor according to the present invention.

4 is a cross-sectional view taken along the line A-A of FIG. 3.

5 is a front view of a differential pressure separating plate according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

2: casing 4: driving part

6: compression unit 8: differential pressure separator

10: first cover 12: second cover

14: suction pipe 16: discharge pipe

22: rotating shaft 24: main bearing

28: cylinder 32: eccentric ring

52: muffler part 54: differential pressure part

56 bolt 58 coolant outlet

60: stepped portion 62: first stepped portion

64: second step

Horizontal compressor having a differential pressure separating plate according to the present invention for realizing the above object is mounted on the upper surface of the main bearing and formed in a shape having a predetermined space to reduce the noise of the refrigerant, and the outer side in the muffler It is integrally extended to the upper surface of the main bearing to be integrally divided into a high pressure chamber and a low pressure chamber, and the end portion includes a differential pressure portion formed to have a predetermined gap with the outer edge of the main bearing so that the refrigerant can pass through It is characterized in that the configuration.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

2 is a cross-sectional view of a horizontal compressor according to the present invention.

The horizontal compressor according to the present invention includes a casing (2), a driving part (4) embedded in one side of the casing (2) and generating a rotational force, and built in the other side of the casing (2) and generated in the driving part (4). Compression part 6 which compresses a refrigerant by the driving force which becomes, and a lubrication part which supplies oil to each sliding part in the said compressor. In addition, a differential pressure separating plate 8 is installed between the compression part 6 and the driving part 4 to generate a pressure difference so as to partition the inside of the casing 2 into a high pressure part and a low pressure part.

The casing 2 is formed in a cylindrical shape, and the first cover 10 and the second cover 12 are respectively mounted to be opened on both sides of the casing 2, and a suction pipe on which one side of the casing 2 is sucked in refrigerant. 14 is connected, and the other side of the casing 2 is connected to the discharge tube 16 through which the compressed refrigerant is discharged.

The drive unit 4 is fixed to one side of the casing 2 and the stator 18 to which power is applied from the outside, and is disposed at regular intervals inside the stator 18 to interact with the stator 18 Rotor 20 is rotated, and the rotating shaft 22 is fixed to the center of the rotor 20 is rotated together to transmit a driving force to the compression unit (6).

The compression unit 6 forms a compression chamber 34 in a predetermined space and is connected to the cylinder 28 connected to the suction pipe 14 and on an outer circumferential surface of the eccentric portion 30 formed on one side of the rotation shaft 22. It consists of a rolling piston 32 and the like rotatably fitted and rotated and in contact with the inner surface of the compression chamber 34.

The main bearings 24 and the sub bearings 26 are rotatably supported on both sides of the cylinder 28 so as to rotatably support the rotating shaft 22 and form part of the compression chamber 34.

The main bearing 24 has a plurality of through-holes 38 through which the refrigerant and oil pass in the circumferential direction at regular intervals, and one side of the main bearing 24 has a discharge port 40 through which the compressed refrigerant is discharged.

The differential pressure separating plate divides the compressor into a high pressure chamber 42 and a low pressure chamber 44 to act as a muffler to reduce noise of the refrigerant discharged to the discharge port 40 on the side of the main bearing 24. (8) is mounted.

As shown in FIGS. 3 and 4, the differential pressure separating plate 8 has a muffler part 52 having a predetermined space for attenuating the noise of the refrigerant, and extends outside the muffler part 52 and inside the compressor. The pressure difference part 54 which divides into the high pressure chamber 42 and the low pressure chamber 44 is comprised.

Here, the muffler portion 52 is bent to have a predetermined space and fastened with a bolt 56 on the surface of the main bearing 24, a through hole 50 into which the main bearing 24 is inserted is formed At one side of the through hole 50, a coolant outlet 58 through which coolant is discharged is formed.

In addition, the differential pressure portion 54 extends to the outside of the muffler portion 52 and is in close contact with the front of the main bearing 24 to generate a pressure difference, and a stepped portion 60 is formed at the edge portion thereof. Between the step portion 60 and the main bearing 24 has a predetermined gap (P) to allow the refrigerant to pass through. In addition, a coolant passage 70 through which a coolant passes is formed at one side of the differential pressure unit 54.

The stepped part 60 may include a first stepped part 62 in which an outer circumferential surface of the differential pressure part 54 is bent at an angle in an upward direction, and a second extended part extending from the first stepped part to be bent in a flat shape. It is comprised by the step part 64. At this time, the stepped portion 60 has a form in which the edge of the main bearing 24 is wrapped with a predetermined gap P.

Since the refrigerant passes through the gap P between the step portion 60 and the main bearing 24, the pressure difference between the high pressure chamber 42 and the low pressure chamber 44 changes according to the size of the gap P. do. Therefore, in order to maintain the oil level of the high pressure chamber 42 and the low pressure chamber 44 in an appropriate state, the size of the gap P should be optimized.

The lubrication unit is connected to the rotary shaft 22 located in the high pressure chamber 42, the suction force is generated by the centrifugal force of the rotary shaft 22 and the oil pipe 70 for sucking the oil stored in the high pressure chamber 42, Is formed in the longitudinal direction in the center of the rotary shaft 22 is composed of an oil passage 72 and the like to transfer the oil sucked into the oil pipe 70 to each sliding portion.

Here, since the oil filled in the compressor is divided into the high pressure chamber 42 and the low pressure chamber 44 by the differential pressure separating plate 8, the oil level of the high pressure chamber 42 is the low pressure chamber 44. ) Is formed higher than the oil level.

The operation of the horizontal compressor according to the present invention configured as described above will be described below.

When power is applied to the stator 18, the rotor 20 is rotated by the interaction of the stator 18 and the rotor 20, and the rotating shaft 22 is rotated together with the rotor 20.

Then, the rolling piston 32 rotates and rotates in the compression chamber 34 to compress the fluid sucked into the suction pipe 14 and discharge the fluid to the discharge port 40. The refrigerant discharged into the discharge port 40 flows into the muffler portion 52 of the differential pressure separating plate 8, and noise is attenuated and discharged into the compressor through the refrigerant discharge port 58 formed in the differential pressure separating plate 8. .

In addition, the refrigerant filled in the high pressure chamber 42 is sucked into the oil pipe 70 by the centrifugal force of the rotating shaft 22, and is transferred to each sliding part through the oil passage 72 of the rotating shaft 22 to perform a lubricating action. After performing the lubricating action, the oil passes through the gap between the stator 18 and the rotor 20 together with the refrigerant and hits the inner surface of the second cover 12.

At this time, the coolant and the oil are separated while hitting the second cover 12 and the coolant flows to the coolant guide 80 formed between the casing 2 and the stator 18, and formed on the differential pressure separating plate 8. Passed through the coolant passage 70 is discharged to the outside through the discharge pipe (16).

At this time, the refrigerant passes through the refrigerant passage 70 and passes through the gap P between the step portion 60 of the differential pressure separating plate and the main bearing 24 and is discharged to the discharge tube 16.

Then, the oil separated while hitting the second cover 12 falls to the lower side of the low pressure chamber 44 and the casing 2 and the stator 18 by the pressure difference between the high pressure chamber 42 and the low pressure chamber 44. Inflow into the oil guide 82 formed between the through and through the gap (P) between the step portion 60 and the main bearing 24 of the differential pressure separating plate 8 is supplied to the high pressure chamber 42 is The oil level difference between the chamber 42 and the low pressure chamber 44 is maintained at an appropriate level.

5 is a front view of a differential pressure separating plate according to another embodiment of the present invention.

The differential pressure separating plate according to another embodiment has the same structure as that described in the above embodiment, except that the oil passage 90 through which the oil in the low pressure chamber is moved to the high pressure chamber is formed in the stepped portion.

That is, the lubricated oil is dropped to the bottom of the low pressure chamber 44, the oil of the low pressure chamber 44 is not only the clearance P between the step portion 60 and the main bearing 24, but also the oil passage ( 90 is moved to the high pressure chamber 42.

In the horizontal compressor according to the present invention constructed and operated as described above, a differential pressure separator is installed between the compression unit and the driving unit to partition the inside of the compressor into a high pressure chamber and a low pressure chamber, and the oil level between the high pressure chamber and the low pressure chamber is a certain difference. It is possible to minimize the phenomenon of oil flowing out through the discharge pipe by changing the position of the discharge pipe to the side of the casing to improve the reliability of the compressor by smoothing the lubrication of each sliding part inside the compressor. Can extend the life of the compressor.

In addition, by manufacturing the differential pressure separating plate integrally with the muffler, the assembly process can be shortened and the manufacturing cost can be reduced.

In addition, the differential pressure forming part to form the differential pressure in the differential pressure separating plate can completely cover the upper surface of the main bearing can increase the pressure difference between the high pressure chamber and the low pressure chamber to facilitate the supply of oil for lubrication.

Claims (7)

A muffler portion mounted to an upper surface of the main bearing and formed in a shape having a predetermined space to reduce noise of the refrigerant; It is integrally extended from the muffler to the outside and in close contact with the upper surface of the main bearing to partition the inside of the compressor into a high pressure chamber and a low pressure chamber, and the end portion is formed to have a predetermined gap with the outer edge of the main bearing to allow the refrigerant to pass through. Horizontal compressor having a differential pressure separating plate, characterized in that comprising a differential pressure that is configured. The method of claim 1, The muffler is bent to have a predetermined space and bolted to the upper surface of the main bearing, the differential pressure separating plate, characterized in that the refrigerant outlet for discharging the refrigerant attenuated coolant is formed on one side of the through hole in which the main bearing is inserted; Having a horizontal compressor. The method of claim 1, The curved stepped portion is formed at the edge portion of the differential pressure portion, and the horizontal compressor, characterized in that a predetermined clearance gap through which the refrigerant passes is formed between the stepped portion and the main bearing. The method of claim 3, wherein And the stepped portion is bent at an angle in an upward direction, and is bent in a planar shape to form a gap having a predetermined gap on an edge circumferential surface of the main bearing. The method of claim 3, wherein The stepped portion may include a first stepped portion in which an outer circumferential surface of the differential pressure portion is bent at an angle in an upward direction; Comprising a second stepped portion extending from the first stepped portion is bent in a flat form, and has a differential pressure separation plate, characterized in that a predetermined gap (P) is formed between the second stepped portion and the edge of the main bearing Horizontal compressor. The method of claim 1, The horizontal pressure compressor having a differential pressure separator, characterized in that the refrigerant passage through which the refrigerant is passed is formed in the differential pressure portion. The method of claim 1, And the oil pressure passage in which the oil in the low pressure chamber is moved to the high pressure chamber in the differential pressure unit.