Compressor

Patent metadata

Field	Value
Publication number	US-2021108837-A1
Application number	US-202017067304-A
Country	US
Kind code	A1
Filing date	Oct 9, 2020
Priority date	Oct 10, 2019
Publication date	Apr 15, 2021
Grant date	—

Abstract

A compressor includes: a cylinder in which a piston is accommodated, the cylinder defining a compression space that is configured, based on the piston reciprocating in an axial direction, to compress a refrigerant gas therein, and a frame configured to accommodate the cylinder therein and defining a gas hole configured to pass the refrigerant gas therethrough. The gas hole is configured to communicate with an outside of the frame to receive the refrigerant gas and communicate with a gas pocket that is defined between an inner circumferential surface of the frame and an outer circumferential surface of the cylinder. The outer circumferential surface of the cylinder or the inner circumferential surface of the frame provides a plurality of restrictor regions partitioned by a gas supply passage, the gas supply passage defined to be recessed at the cylinder and configured to communicate with the gas hole.

First claim

What is claimed is:

1 . A compressor comprising:
a cylinder in which a piston is accommodated, the cylinder defining a compression space that is configured, based on the piston reciprocating in an axial direction, to compress a refrigerant gas therein; and a frame configured to accommodate the cylinder therein and defining a gas hole configured to pass the refrigerant gas therethrough, wherein one side of the gas hole is configured to communicate with an outside of the frame to receive the refrigerant gas, and the other side of the gas hole is configured to communicate with a gas pocket that is defined between an inner circumferential surface of the frame and an outer circumferential surface of the cylinder, wherein the outer circumferential surface of the cylinder or the inner circumferential surface of the frame provides a plurality of restrictor regions partitioned by a gas supply passage, the gas supply passage defined to be recessed at the cylinder and configured to communicate with the gas hole, and wherein a restrictor region of the plurality of restrictor regions or a region of the cylinder facing the restrictor region defines a gas intake hole configured to communicate with an inner space of the cylinder and the gas pocket.

2 . The compressor of claim 1 , wherein
the gas supply passage comprises a plurality of first-directional gas supply passages extending in a longitudinal direction of the cylinder and a plurality of second-directional gas supply passages extending in a circumferential direction of the cylinder, wherein the plurality of restrictor regions is partitioned by the plurality of first-directional gas supply passages and the plurality of second-directional gas supply passages.

3 . The compressor of claim 2 , wherein
the plurality of first-directional gas supply passages is defined along the circumferential direction of the cylinder, wherein the plurality of second-directional gas supply passages is defined along the longitudinal direction of the cylinder, and wherein the plurality of restrictor regions is provided in the longitudinal direction of the cylinder and the circumferential direction of the cylinder.

4 . The compressor of claim 3 , wherein
the plurality of restrictor regions provided in the circumferential direction of the cylinder has the same width in the axial direction.

5 . The compressor of claim 4 , wherein
the plurality of restrictor regions provided in the longitudinal direction of the cylinder has different widths from each other in the axial direction.

6 . The compressor of claim 5 , wherein
a first restrictor region of the plurality of restrictor regions provided at a first part of the cylinder or the frame facing the first part of the cylinder has a width shorter than a width of a second restrictor region of the plurality of restrictor regions provided at a second part of the cylinder or the frame facing the second part of the cylinder.

7 . The compressor of claim 3 , wherein
the plurality of second-directional gas supply passages has different widths from each other in the longitudinal direction of the cylinder.

8 . The compressor of claim 7 , wherein
a first second-directional gas supply passage of the plurality of second-directional gas supply passages defined at a first part of the cylinder or the frame facing the first part of the cylinder has a width longer than a width of a second second-directional gas supply passage of the plurality of second-directional gas supply passages defined at a second part of the cylinder or the frame facing the second part of the cylinder.

9 . The compressor of claim 3 , wherein
the plurality of first-directional gas supply passages has different widths from each other in the longitudinal direction of the cylinder.

10 . The compressor of claim 9 , wherein
a width of a first part of the first-directional gas supply passage is longer than a width of a second part of the second-directional gas supply passage.

11 . The compressor of claim 2 ,
wherein the cylinder comprises:
a cylinder body in a cylindrical shape and extending in the axial direction; and
a cylinder flange protruding outward in a radial direction from one side of the cylinder and coupled to the frame,
wherein the gas supply passage is defined at the cylinder body, and wherein the second-directional gas supply passage comprises a first second-directional gas supply passage defined adjacent to the cylinder flange, a second second-directional gas supply passage spaced apart from the first second-directional gas supply passage by a predetermined distance, and a third second-directional gas supply passage spaced apart from the second second-directional gas supply passage by a predetermined distance.

12 . The compressor of claim 11 , wherein
the third second-directional gas supply passage defines a seating recess in which a sealing member provided between the cylinder and the frame is disposed.

13 . The compressor of claim 2 , wherein
one of the plurality of second-directional gas supply passages is disposed to overlap an outlet of the gas hole.

14 . The compressor of claim 1 , wherein
the restrictor region is provided to have a circular shape, an oval shape, a portion of the circular shape, and a portion of the oval shape.

15 . The compressor of claim 1 , wherein,
an interval between the inner circumferential surface of the frame and the outer circumferential surface of the cylinder is provided within a range of 5 to 10 micrometers in the restrictor region.

16 . The compressor of claim 1 , wherein
a width of the gas supply passage is longer than an interval between the inner circumferential surface of the frame and the outer circumferential surface of the cylinder in the restrictor region by 10 times or more.

17 . The compressor of claim 1 , wherein
a depth of the gas supply passage is longer than an interval between the inner circumferential surface of the frame and the outer circumferential surface of the cylinder in the restrictor region by 10 times or more.

18 . The compressor of claim 1 , wherein
the frame comprises:
a frame body having a cylindrical shape and accommodating the cylinder; and
a frame flange extending outward in a radial direction from a first part of the frame body and connected to a driving unit configured to drive the piston, and
wherein one side of the gas hole is configured to communicate with a first part of the frame flange and the other side of the gas hole is configured to communicate with an inner side of the frame body.

19 . The compressor of claim 18 , wherein
the frame further comprises a frame connection part configured to connect the frame body and the frame flange, wherein the gas hole extends from an inlet provided at the frame flange in a first direction, molds in a direction adjacent to the cylinder, and extends in a second direction to be connected to an outlet provided at the frame body, and wherein the outlet is provided to overlap a portion of the gas supply passage.

20 . The compressor of claim 1 , wherein
the cylinder defines a first opening at a first end and a second opening at a second end, wherein the piston is inserted through the first opening of the cylinder, and wherein the second opening of the cylinder is configured to be closed by a discharge valve assembly.

Assignees

• Lg Electronics Inc

Inventors

• Son Sangik
• Kim Youngpil
• Lee Kyungmin
• Jeon Wooju

Classifications

• F04B35/045 Primary

  using solenoids · CPC title

• F04B39/04

  Measures to avoid lubricant contaminating the pumped fluid · CPC title

• F04B39/126

  Cylinder liners · CPC title

• F04B39/0292

  Lubrication of pistons or cylinders · CPC title

• F04B39/123

  Fluid connections · CPC title