Rotary compressor

Patent metadata

Field	Value
Publication number	US-11002279-B2
Application number	US-201816038340-A
Country	US
Kind code	B2
Filing date	Jul 18, 2018
Priority date	Jul 24, 2017
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

A rotary compressor includes a cylinder with a vane slot and a suction port. A vane is slidably disposed in the vane slot. The suction port guides fluid to a compression chamber at one circumferential end of the vane slot. The suction port may be formed in a recessed manner in a radial direction such that at least an end of the suction port in contact with an inner circumferential surface of the cylinder forms a slot shape extending between opposite axial side surfaces of the cylinder. A circumferential length of the suction port is reduced from conventional suction ports as a result of the slot configuration, thereby advancing the compression start angle, and a partition wall portion between the suction port and the vane slot may have elasticity, thereby suppressing close contact between the vane and the vane slot.

First claim

What is claimed is:

1. A rotary compressor, comprising: a cylinder having an annular shape; at least two plate members provided on upper and lower axial side surfaces of the cylinder, respectively, and forming a compression chamber together with the cylinder; a rolling piston provided inside the compression chamber, the rolling piston being coupled to a rotation shaft; and a vane slidably disposed in a vane slot formed in the cylinder such that contact between the vane and an outer circumferential surface of the rolling piston divides the compression chamber into a suction chamber and a discharge chamber, wherein the cylinder comprises a suction port configured for guiding fluid to the compression chamber at one circumferential side of the vane slot, and the suction port is recessed in a radial direction such that at least an inner circumferential end of the suction port located at an inner circumferential surface of the cylinder forms a slot shape extending between the upper and lower axial side surfaces of the cylinder, wherein the suction port has an asymmetric shape, the suction port having a cross sectional area closer to the vane slot with respect to a radial center line of the suction port that is larger than a cross sectional area disposed on an opposite side of the radial center line from the vane.

2. The rotary compressor of claim 1 , wherein the suction port is formed in the slot shape from an outer circumferential end to the inner circumferential end located at the inner circumferential surface of the cylinder.

3. The rotary compressor of claim 1 , wherein the suction port comprises a chamfered portion formed on at least one edge of the suction port in contact with the inner circumferential surface of the cylinder.

4. The rotary compressor of claim 1 , wherein the suction port is formed such that an inner circumferential end cross-sectional area is greater than an outer circumferential end cross-sectional area with respect to the cylinder.

5. A rotary compressor, comprising: a first cylinder, comprising: a first compression chamber, a first suction port communicatively coupled with the first compression chamber, and a first vane slot on one side of the first suction port; a first roller rotatably supported in the first compression chamber; a first vane slidably disposed in the first vane slot, and contacting an outer circumferential surface of the first roller; a second cylinder disposed on one axial side of the first cylinder, and forming a second compression chamber separated from the first compression chamber, the second cylinder comprising: a second suction port communicatively coupled with the second compression chamber, and a second vane slot on one side of the second suction port; a second roller rotatably supported in the second compression chamber; a second vane slidably disposed in the second vane slot, and contacting an outer circumferential surface of the second roller; and an intermediate plate disposed between the first cylinder and the second cylinder, separating the first compression chamber and the second compression chamber, and formed with a suction passage configured for connection to a suction pipe, the suction passage being communicatively coupled with the first suction port and the second suction port, wherein at least one of the first suction port or the second suction port fluidly connects an inner circumferential surface of the respective first or second cylinder and at least one axial side surface of the respective first or second cylinder in contact with the intermediate plate, wherein a first partition wall portion is formed between the first suction port and the first vane slot and a second partition wall portion is formed between the second suction port and the second vane, wherein the first suction port has an asymmetric shape, the first suction port having a cross sectional area closer to the first vane slot with respect to a radial center line of the first suction port that is larger than a cross sectional area disposed on an opposite side of the radial center line from the first vane.

6. The rotary compressor of claim 5 , wherein at least one of the first suction port or the second suction port is formed in a slot shape extending between opposite axial side surfaces of the respective first or second cylinder such that both of the axial side surfaces thereof are open.

7. The rotary compressor of claim 5 , wherein at least one of the first suction port or the second suction port is formed in a slot shape extending from an outer circumferential surface to the inner circumferential surface of the respective first or second cylinder.

Assignees

• Lg Electronics Inc

Inventors

• Cho Gukhyun
• Lee Sedong
• Sa Bumdong

Classifications

• F04C29/12 Primary

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04C18/356 Primary

  with vanes reciprocating with respect to the outer member · CPC title

• F04C28/22

  by changing the eccentricity between cooperating members · CPC title

• F04C23/008

  Hermetic pumps · CPC title

• F04C2/3564 Primary

  the surfaces of the inner and outer member, forming the working space, being surfaces of revolution · CPC title