Scroll compressor having at least one valve fixedly inserted into block insertion groove of non-orbiting scroll

Patent metadata

Field	Value
Publication number	US-11953003-B2
Application number	US-202318100712-A
Country	US
Kind code	B2
Filing date	Jan 24, 2023
Priority date	Jun 9, 2022
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

A scroll compressor is provided, the scroll compressor having a block insertion groove recessed by a predetermined depth into a rear surface of a non-orbiting scroll to accommodate a discharge port and a plurality of bypass holes, and a retainer block having a bypass valve that opens and closes the plurality of bypass holes fixedly inserted into the block insertion groove. The bypass valve may be fixed to a first axial side surface of the retainer block facing the block insertion groove. Through this, the bypass valve that suppresses or prevents overcompression of a compression chamber is not fastened to a non-orbiting end plate, which may allow the non-orbiting end plate to be reduced in thickness. This may shorten lengths of the plurality of bypass holes and the discharge port by the reduced thickness of the non-orbiting end plate, thereby decreasing a dead volume in the plurality of bypass holes and the discharge port.

First claim

What is claimed is:

1. A scroll compressor, comprising:
a casing;
an orbiting scroll coupled to a rotary shaft in an inner space of the casing to perform an orbiting motion;
a non-orbiting scroll engaged with the orbiting scroll to define a compression chamber, and provided with a discharge port and a plurality of bypass holes through which refrigerant in the compression chamber is discharged; and
a back pressure chamber assembly coupled to a rear surface of the non-orbiting scroll to press the non-orbiting scroll toward the orbiting scroll, wherein a block insertion groove is recessed by a predetermined depth into the rear surface of the non-orbiting scroll to accommodate the discharge port and the plurality of bypass holes therein, and a retainer block having at least one bypass valve that opens and closes the plurality of bypass holes is fixedly inserted into the block insertion groove, wherein the at least one bypass valve is fixed to a first axial side surface of the retainer block facing the block insertion groove, wherein the compression chamber includes a first compression chamber and a second compression chamber, wherein the plurality of bypass holes include a first bypass hole that communicates with the first compression chamber and a second bypass hole that communicates with the second compression chamber, and wherein the at least one bypass valve comprises:
a first bypass valve that opens and closes the first bypass hole;
a second bypass valve that opens and closes the second bypass hole; and
a valve connection portion that connects the first bypass valve and the second bypass valve, wherein a discharge guide protrusion extends axially from the retainer block toward the block insertion groove, wherein a discharge guide hole that communicates with the discharge port is formed in the discharge guide protrusion, and wherein a sealing connection portion that extends between the block insertion groove and the discharge guide protrusion is formed on the valve connection portion.

2. The scroll compressor of claim 1 , wherein the at least one bypass valve comprises:
a fixing portion fixed between the block insertion groove and the retainer block facing the block insertion groove; and
an opening/closing portion that extends from the fixing portion to open and close the plurality of bypass holes while being bent or unbent with respect to the fixing portion, and wherein the fixing portion is fastened to the first axial side surface of the retainer block.

3. The scroll compressor of claim 2 , wherein the retainer block has a bypass valve support disposed on the first axial side surface, and wherein the bypass valve support comprises:
a valve fixing surface fixed to the block insertion groove as the fixing portion is fastened thereto; and
a valve opening/closing surface that extends from the valve fixing surface in a curved or inclined manner so as to be spaced apart from the block insertion groove and supports the opening/closing portion.

4. The scroll compressor of claim 1 , wherein the first bypass valve includes a first fixing portion fixed to the retainer block and a first opening/closing portion that extends from the first fixing portion to open and close the first bypass hole, wherein the second bypass valve includes a second fixing portion fixed to the retainer block and a second opening/closing portion that extends from the second fixing portion to open and close the second bypass hole, and wherein the valve connection portion connects the first fixing portion and the second fixing portion.

5. The scroll compressor of claim 4 , wherein a first valve through-hole is formed through the first fixing portion, and a second valve through-hole is formed through the second fixing portion, wherein the first fixing portion is fixed to the retainer block by a first fastening member inserted through the first valve through-hole, and the second fixing portion is fixed to the retainer block by a second fastening member inserted through the second valve through-hole, and wherein fastening member accommodating grooves into which a head of the first fastening member and a head of the second fastening member are inserted are formed in at least one of the block insertion groove or the first axial side surface of the retainer block.

6. The scroll compressor of claim 1 , wherein the sealing connection portion includes a discharge communication hole that communicates with the discharge guide hole.

7. The scroll compressor of claim 1 , wherein the retainer block is fixed in contact with the rear surface of the non-orbiting scroll and a rear surface of the back pressure chamber assembly facing the non-orbiting scroll by a fastening force that fastens the non-orbiting scroll and the back pressure chamber assembly.

8. The scroll compressor of claim 1 , wherein the retainer block is fastened to the rear surface of the back pressure chamber assembly facing the retainer block in an axial direction.

9. The scroll compressor of claim 8 , wherein the at least one bypass valve is fastened to the retainer block by a fastening member that fastens the retainer block to the back pressure chamber assembly.

10. A scroll compressor, comprising:
a casing;
an orbiting scroll coupled to a rotary shaft in an inner space of the casing to perform an orbiting motion;
a non-orbiting scroll engaged with the orbiting scroll to define a compression chamber, and provided with a discharge port and a plurality of bypass holes through which refrigerant in the compression chamber is discharged; and
a back pressure chamber assembly coupled to a rear surface of the non-orbiting scroll to press the non-orbiting scroll toward the orbiting scroll, wherein a block insertion groove is recessed by a predetermined depth into the rear surface of the non-orbiting scroll to accommodate the discharge port and the plurality of bypass holes therein, and a retainer block having at least one bypass valve that opens and closes the plurality of bypass holes is fixedly inserted into the block insertion groove, wherein the at least one bypass valve is fixed to a first axial side surface of the retainer block facing the block insertion groove, wherein the back pressure chamber assembly includes a valve guide groove formed therein such that a discharge valve is slidably inserted therein, wherein the retainer block includes a discharge valve accommodating portion in which the discharge valve is axially supported, wherein the discharge valve accommodating portion includes the discharge guide hole that communicates with the discharge port, and wherein the discharge valve is disposed between the back pressure chamber assembly and the retainer block to open and close the discharge guide hole.

11. A scroll compressor, comprising:
a casing;
an orbiting scroll coupled to a rotary shaft in an inner space of the casing to perform an orbiting motion;
a non-orbiting scroll engaged with the orbiting scroll to define a compression chamber, and provided with a discharge port and a plurality of bypass holes through which refrigerant in the compression chamber is discharged; and
a back pressure chamber assembly coupled to a rear surface of the non-orbiting scroll to press the non-orbiting scroll toward the orbiting scroll, wherein a block insertion groove is recessed by a predetermined depth into the rear surface of the non-orbiting scroll to accommodate the discharge port and the plurality of bypass holes therein, and a retainer block having at least one bypass valve that opens and closes the plurality of bypass holes is fixedly inserted into the block insertion groove, wherein the at least one bypass valve is fixed to a first axial side surface of the retainer block facing

Assignees

• Lg Electronics Inc

Inventors

• Jo Changeol
• Kim Jeonghun
• Han Nara
• Yun Juhwan

Classifications

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C28/26

  using bypass channels · CPC title

• F04C29/124

  with inlet and outlet valves specially adapted for rotary or oscillating piston pumps · CPC title

• F04C29/128

  of the elastic type, e.g. reed valves · CPC title

• F04C23/008

  Hermetic pumps · CPC title