Scroll compressor

Patent metadata

Field	Value
Publication number	US-2018172004-A1
Application number	US-201815876396-A
Country	US
Kind code	A1
Filing date	Jan 22, 2018
Priority date	Apr 26, 2016
Publication date	Jun 21, 2018
Grant date	—

Abstract

A scroll compressor includes: a frame configured to support a second scroll by being coupled to a first scroll; a sealing member insertion groove formed in a ring shape, on at least one of one side surface of the second scroll and one side surface of the frame contacting the second scroll; and a sealing member formed in a ring shape, inserted into the sealing member insertion groove, and configured to divide an interval between the second scroll and the frame in a radial direction, wherein the sealing member is formed such that a sectional surface of an inner circumferential surface thereof is smaller than that of an outer circumferential surface thereof, and such that a second gap between the outer circumferential surface of the sealing member and an outer side wall surface of the sealing member insertion groove is smaller than or equal to a first gap between the inner circumferential surface of the sealing member and an inner side wall surface of the sealing member insertion groove.

First claim

What is claimed is:

1 . A scroll compressor, comprising:
a first scroll; a second scroll which forms a compression chamber together with the first scroll while performing an orbiting movement with respect to the first scroll; a frame configured to support the second scroll by being coupled to the first scroll; a sealing member insertion groove formed in a ring shape, on at least one of one side surface of the second scroll and one side surface of the frame contacting the second scroll; and a sealing member formed in a ring shape, inserted into the sealing member insertion groove, and configured to divide an interval between the second scroll and the frame in a radial direction, wherein the sealing member is formed such that a sectional surface of an inner circumferential surface thereof is smaller than that of an outer circumferential surface thereof, and such that a second gap between the outer circumferential surface of the sealing member and an outer side wall surface of the sealing member insertion groove is smaller than or equal to a first gap between the inner circumferential surface of the sealing member and an inner side wall surface of the sealing member insertion groove.

2 . The scroll compressor of claim 1 , wherein the second gap is formed to be 0.05˜1.0% with respect to an outer diameter of the sealing member.

3 . The scroll compressor of claim 1 , wherein a first chamfering portion is formed on at least one of an outer edge of the sealing member insertion groove and an outer edge of the sealing member.

4 . The scroll compressor of claim 3 , wherein the sealing member includes:
a first sealing portion formed in a ring shape, and having one surface forming an axial sealing surface with the frame; and a second sealing portion extended from another surface of the first sealing portion in a ring shape, and having an outer circumferential surface forming a radial sealing surface with the outer side wall surface of the sealing member insertion groove, and wherein an axial height of the first chamfering portion is formed to be smaller than or equal to an axial thickness of the first sealing portion.

5 . The scroll compressor of claim 1 , wherein the sealing member includes:
a first sealing portion formed in a ring shape, and having one surface forming an axial sealing surface with the frame; and a second sealing portion extended from another surface of the first sealing portion in a ring shape, and having an outer circumferential surface forming a radial sealing surface with the outer side wall surface of the sealing member insertion groove, and wherein an outer diameter of the first sealing portion is formed to be equal to an outer diameter of the second sealing portion.

6 . The scroll compressor of claim 1 , wherein the sealing member includes:
a first sealing portion formed in a ring shape, and having one surface forming an axial sealing surface with the frame; and a second sealing portion extended from another surface of the first sealing portion in a ring shape, and having an outer circumferential surface forming a radial sealing surface with the outer side wall surface of the sealing member insertion groove, and wherein an outer diameter of the first sealing portion is formed to be different from an outer diameter of the second sealing portion.

7 . The scroll compressor of claim 6 , wherein the second gap is formed to be 0.05˜1.0% with respect to an outer diameter of the sealing member.

8 . The scroll compressor of claim 1 , wherein the sealing member is formed of Teflon (PEFE) mixed with carbon fibers.

9 . The scroll compressor of claim 8 , wherein the sealing member further includes a graphite material.

10 . The scroll compressor of claim 1 , wherein the sealing member is formed to have a ‘¬’-shaped sectional surface, and a part of the sealing member contacting the frame has a larger thickness than a part of the sealing member contacting the sealing member insertion groove.

11 . The scroll compressor of claim 1 , wherein a gap between the second scroll and the frame is formed such that an inner interval is larger than an outer interval in a radius direction based on the sealing member insertion groove, and
wherein a first passage for communicating the inner interval and the outer interval with each other is formed at the second scroll or the frame.

12 . The scroll compressor of claim 11 , wherein a second passage for communicating the outer interval with the compression chamber is formed at the first scroll or the frame.

13 . A scroll compressor, comprising:
a casing having an inner space where oil is stored; a driving motor provided at the inner space of the casing; a rotation shaft coupled to the driving motor; a frame provided below the driving motor; a first scroll provided below the frame, and having a first wrap on one side surface thereof; a second scroll having a sealing member insertion groove on a surface thereof contacting the frame, provided between the frame and the first scroll, having a second wrap engaged with the first wrap, eccentrically-coupled to the rotation shaft such that the rotation shaft is overlapped with the second wrap in a radial direction, and forming compression chambers at a space between the second scroll and the first scroll while performing an orbiting movement with respect to the first scroll; and a sealing member formed in a ring shape, inserted into the sealing member insertion groove, provided between the frame and the second scroll, and configured to divide an interval between the frame and the second scroll into an inner interval and an outer interval, wherein the sealing member is formed such that a sectional surface of an inner circumferential surface thereof is smaller than that of an outer circumferential surface thereof, and an outer diameter of the sealing member is smaller than that of the sealing member insertion groove.

14 . The scroll compressor of claim 13 , wherein a plurality of oil passages for guiding the oil stored in the casing to an outer circumferential surface of the rotation shaft are formed at the rotation shaft, and
wherein at least one of the plurality of oil passages is formed to be communicated with the inner interval separated from the outer wall by the sealing member.

15 . The scroll compressor of claim 14 , wherein the outer interval is communicated with a compression chamber which forms an intermediate pressure between a suction pressure and a discharge pressure, among the compression chambers.
wherein a communication passage for communicating the inner interval and the outer interval with each other is further provided at the second scroll or the frame, and wherein a depressurizing unit is provided at the communication passage.

16 . The scroll compressor of claim 15 , wherein the interval between the frame and the second scroll is formed such that the outer interval is smaller than the inner interval, and
wherein a chamfering portion inclined towards the sealing member insertion groove is formed at an edge of the sealing member insertion groove contacting the outer interval.

17 . The scroll compressor of claim 16 , wherein the sealing member is formed to have a ‘¬’-shaped sectional surface, and an outer diameter of the sealing member is smaller than that of the sealing member insertion groove by 0.05˜1.0%.

18 . The scroll compressor of claim 13 , wherein the sealing member is formed of Teflon (PEFE) mixed with carbon fibers.

19 . The scroll compressor of claim 18 , wherein the s

Assignees

• Lg Electronics Inc

Inventors

• Lee Howon
• Choi Jungsun
• Kim Cheolhwan

Classifications

• F04C23/008

  Hermetic pumps · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C27/005

  Axial sealings for working fluid · CPC title

• F04C2230/60

  Assembly methods · CPC title

• F04C27/008

  for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine · CPC title