Scroll compressor

Patent metadata

Field	Value
Publication number	US-12473918-B2
Application number	US-202318842136-A
Country	US
Kind code	B2
Filing date	Jan 2, 2023
Priority date	Mar 3, 2022
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A scroll compressor including a casing forming the exterior; a driving unit installed in the casing and generates a drive power; a rotary shaft installed in the driving unit to be rotatable; a compression portion including an orbiting scroll installed on the rotary shaft to be capable of orbiting, and a fixed scroll which is coupled to be engaged with the orbiting scroll so as to form a compression chamber between the orbiting scroll and the fixed scroll; and a check valve including a valve portion which is arranged so that one side thereof faces the compression chamber and guides suction of a refrigerant when being opened and is closed when the driving of the compressor is stopped so as to prevent the refrigerant from flowing backward, and a valve fixing portion which is installed on the side surface provided in the suction port of the fixed scroll.

First claim

The invention claimed is:

1 . A scroll compressor, comprising:
a casing that defines an appearance thereof; a driving unit that is installed inside of the casing to generate a drive force; a rotary shaft that is rotatably installed in the driving unit; a compression unit that comprises an orbiting scroll installed on the rotary shaft to perform an orbital motion, and a fixed scroll engaged with the orbiting scroll to form a compression chamber together with the orbiting scroll; and a check valve that comprises a valve part having one side disposed to face the compression chamber to guide suction of refrigerant when being open and suppress backflow of refrigerant by being closed when an operation of the compressor is stopped, and a valve fixing part installed through a side surface disposed on a suction port of the fixed scroll, wherein the valve fixing part is screw-coupled to the side surface disposed on the suction port of the fixed scroll, and wherein the valve fixing part comprises a screw portion formed to extend spirally in a circumferential direction, and a screw coupling portion is formed on the side surface disposed on the suction port of the fixed scroll and has a screw thread extending in a spiral shape to be screw-coupled with the screw portion.

2 . A scroll compressor, comprising:
a casing that defines an appearance thereof; a driving unit that is installed inside of the casing to generate a drive force; a rotary shaft that is rotatably installed in the driving unit; a compression unit that comprises an orbiting scroll installed on the rotary shaft to perform an orbital motion, and a fixed scroll engaged with the orbiting scroll to form a compression chamber together with the orbiting scroll; and a check valve that comprises a valve part having one side disposed to face the compression chamber to guide suction of refrigerant when being open and suppress backflow of refrigerant by being closed when an operation of the compressor is stopped, and a valve fixing part installed through a side surface disposed on a suction port of the fixed scroll, wherein the valve part comprises:
a valve body having one side inserted into the valve fixing part and comprising a refrigerant flow passage through which refrigerant flows; and
a plate member having a rotating portion on one side adjacent to the compression chamber to be rotatably connected to the valve body, the plate member being open when refrigerant is introduced and closed when the operation of the compressor is stopped to suppress the backflow of the refrigerant.

3 . The scroll compressor of claim 2 , wherein the valve body comprises a rotation-limiting end portion that is disposed on one surface facing the compression chamber and supports the plate member while limiting rotation of the plate member in one direction to suppress the backflow of the refrigerant.

4 . The scroll compressor of claim 2 , wherein the plate member is disposed, in the open state, such that an inner surface thereof is disposed to face a flowing direction of refrigerant in the compression chamber, to guide an introduction of the refrigerant into the compression chamber.

5 . The scroll compressor of claim 4 , wherein a plate member receiving groove is formed in the suction port of the fixed scroll to rotatably receive the plate member, and wherein the plate member receiving groove is formed from one side portion of the compression chamber to another side portion of the compression chamber along a path along which the plate member rotates.

6 . The scroll compressor of claim 4 , wherein the valve body comprises an opening direction maintenance portion formed by cutting one side of an outer circumference into a D-cut shape to maintain an opening direction of the plate member, and wherein a guide groove is formed in a side portion of the fixed scroll to be engaged with the opening direction maintenance portion to maintain the opening direction of the plate member.

7 . The scroll compressor of claim 2 , wherein the valve body comprises a protruding coupling end portion that protrudes toward the valve fixing part from an opposite end of the valve part, and wherein the valve fixing part comprises a coupling groove disposed in an inner circumference of an end portion facing the valve body such that the protruding coupling end portion is inserted and received.

8 . The scroll compressor of claim 1 , wherein the valve fixing part is press-fitted to the side surface disposed on the suction port of the fixed scroll.

9 . The scroll compressor of claim 1 , wherein an inlet coupling portion is disposed in an inner circumference of an opposite side of the valve fixing part to the valve part, such that an inlet tube is installed therein.

10 . The scroll compressor of claim 9 , wherein the inlet coupling portion is formed such that an inner circumference thereof has a polygonal structure for fixing the inlet tube.

11 . The scroll compressor of claim 1 , wherein the valve fixing part further comprises a sealing portion connected to the screw portion and disposed on an outer circumference of an opposite side to the valve part.

12 . The scroll compressor of claim 11 , wherein the sealing portion protrudes radially more than the screw portion, and wherein the valve fixing part comprises an inlet coupling portion disposed in an inner circumference of an opposite side thereof to where the valve part is disposed, such that an inlet tube is installed, and a collar coupling portion formed more inward than the inlet coupling portion to form a step, such that a collar member is installed to be fitted to an inner circumference of the inlet tube.

Assignees

• Lg Electronics Inc

Inventors

• PARK Sangbaek
• Jeon Nayoung
• Kim Cheolhwan

Classifications

• F04C2240/30

  Casings or housings · CPC title

• F04C28/24

  characterised by using valves controlling pressure or flow rate, e.g. discharge valves {or unloading valves}(F04C28/10 takes precedence) · CPC title

• F05B2210/14

  Refrigerants with particular properties, e.g. HFC-134a · CPC title

• F05B2240/20

  Rotors · CPC title

• F05B2240/10

  Stators · CPC title