Sealing member, scroll compressor including a sealing member and method for manufacturing a sealing member for a scroll compressor

Patent metadata

Field	Value
Publication number	US-9890861-B2
Application number	US-201514948928-A
Country	US
Kind code	B2
Filing date	Nov 23, 2015
Priority date	Dec 4, 2014
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A scroll compressor is provided that may include a casing, a discharge cover fixed inside of the casing, a first scroll revolved a rotational shaft, a second scroll provided on the first scroll to define compression chambers, the second scroll having an intermediate pressure discharge hole that communicates with a compression chamber of the compression chambers having an intermediate pressure, a back pressure plate provided on the second scroll and having an intermediate pressure suction hole that communicates with the intermediate pressure discharge hole, a floating plate movably provided at a side of the back pressure plate and defining a back pressure chamber, and a sealing member provided between the back pressure plate and the floating plate, the sealing member including a sealing body, and at least one protrusion provided at an incline with respect to a central line that extends in a horizontal direction of the sealing body.

First claim

What is claimed is:

1. A scroll compressor, comprising:
a casing in which a rotational shaft is provided;
a discharge cover provided at an inside of the casing to partition the inside of the casing into a suction space and a discharge space;
a first scroll revolved by rotation of the rotational shaft;
a second scroll provided at a side of the first scroll to define a plurality of compression chambers together with the first scroll, the second scroll having an intermediate pressure discharge hole that communicates with a compression chamber of the plurality of compression chambers having an intermediate pressure;
a back pressure plate provided on the second scroll and having an intermediate pressure suction hole that communicates with the intermediate pressure discharge hole;
a floating plate movably provided at a side of the back pressure plate to define a back pressure chamber together with the back pressure plate;
at least one sealing member provided between a surface of the back pressure plate and a surface of the floating plate to prevent a refrigerant from leaking from the back pressure chamber, wherein the at least one sealing member includes:
a sealing body; and
at least one protrusion provided at an incline with respect to a central line that extends in a horizontal direction of the sealing body; and

an accommodation portion defined by a recess defined in the back pressure plate and an outer surface of the floating plate and in which the sealing member is provided, wherein the sealing body is seated on a bottom surface of the accommodation portion, and wherein the at least one protrusion protrudes from the sealing body toward a point at which the recess and an outer surface of the floating plate meet each other.

2. The scroll compressor according to claim 1 , wherein the sealing body has at least one sealing surface which is closely attached to the back pressure plate or the floating plate, and wherein the at least one protrusion is spaced apart from the at least one sealing surface.

3. The scroll compressor according to claim 1 , wherein the at least one protrusion includes:
a first protrusion that protrudes from a first portion of an outer circumferential surface of the sealing body; and
a second protrusion that protrudes from a second portion of the outer circumferential surface of the sealing body.

4. The scroll compressor according to claim 3 , wherein a virtual line that connects the first protrusion to the second protrusion and the central line are angled at a predetermined angle.

5. The scroll compressor according to claim 4 , wherein the predetermined angle ranges from approximately 30° to approximately 60°.

6. The scroll compressor according to claim 1 , wherein the recess includes a bent portion bent from a first surface to a second surface of the recess, and wherein the at least one protrusion protrudes from the sealing body toward the bent portion.

7. The scroll compressor according to claim 1 , wherein the back pressure plate includes:
a support supported by the second scroll;
a first wall that extends in an upward direction from an inner circumferential surface of the support; and
a second wall that extends in the upward direction from an outer circumferential surface of the support.

8. The scroll compressor according to claim 7 , wherein the floating plate is provided in a space defined by the first and second walls and the support.

9. The scroll compressor according to claim 8 , wherein the at least one sealing member includes:
a first sealing member provided between the floating plate and an inner circumferential surface of the second wall; and
a second sealing member provided between the floating plate and an outer circumferential surface of the first wall.

10. A scroll compressor, comprising:
a casing in which a rotational shaft is provided;
a discharge cover provided at an inside of the casing to partition the inside of the casing into a suction space and a discharge space;
a first scroll revolved by rotation of the rotational shaft;
a second scroll provided at a side of the first scroll to define a plurality of compression chambers together with the first scroll, the second scroll having an intermediate pressure discharge hole that communicates with a compression chamber of the plurality of compression chambers having an intermediate pressure;
a back pressure plate provided on the second scroll and having an intermediate pressure suction hole that communicates with the intermediate pressure discharge hole;
a floating plate movably provided at a side of the back pressure plate to define a back pressure chamber together with the back pressure plate; and
at least one sealing member provided between a surface of the back pressure plate and a surface of the floating plate to prevent a refrigerant from leaking from the back pressure chamber, wherein the at least one sealing member includes:
a sealing body; and
at least one protrusion that protrudes from the sealing body, wherein a recess is provided in the back pressure plate in which the sealing member is provided, wherein the sealing body is seated on a surface of the recess, wherein the at least one protrusion protrudes from the sealing body toward at least one of the surface of the recess or an outer surface of the floating plate, but does not contact the at least one of the surface of the recess or the outer surface of the floating plate.

11. The scroll compressor according to claim 10 , wherein the recess includes a bent portion bent from a first surface to a second surface of the recess, and wherein the at least one protrusion protrudes from the sealing body toward the bent portion.

12. The scroll compressor according to claim 10 , wherein the back pressure plate includes:
a support supported by the second scroll;
a first wall that extends in an upward direction from an inner circumferential surface of the support; and
a second wall that extends in the upward direction from an outer circumferential surface of the support, and wherein the floating plate is provided in a space defined by the first and second walls and the support.

13. The scroll compressor according to claim 12 , wherein the at least one sealing member includes:
a first sealing member provided between the floating plate and an inner circumferential surface of the second wall; and
a second sealing member provided between the floating plate and an outer circumferential surface of the first wall.

Assignees

• Lg Electronics Inc

Inventors

• Jin Honggyun
• Lee Munyoung
• Joo Sangwoo

Classifications

• F04C27/003

  of resilient material · CPC title

• B29L2031/26

  Sealing devices, e.g. packaging for pistons or pipe joints · CPC title

• B29C2045/0034

  Mould parting lines · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F16J15/3204

  with at least one lip · CPC title