Scroll compressor

Patent metadata

Field	Value
Publication number	US-11187231-B2
Application number	US-201916588716-A
Country	US
Kind code	B2
Filing date	Sep 30, 2019
Priority date	Sep 28, 2018
Publication date	Nov 30, 2021
Grant date	Nov 30, 2021

Abstract

Disclosed herein is a scroll compressor capable of optimizing a position where a load is applied from a support member to an orbiting scroll. The scroll compressor includes a fixed scroll fixed to an inside of a body, an orbiting scroll configured to orbit in engagement with the fixed scroll, a rotary shaft configured to allow the orbiting scroll to orbit, a holding member configured to hold the fixed scroll from a side opposite to the orbiting scroll, and a support member arranged between the rotary shaft and the holding member to support the orbiting scroll by a load applied to a position away from a center of the orbiting scroll.

First claim

What is claimed is:

1. A scroll compressor comprising:
a body;
a fixed scroll fixed to an inside of the body and provided with a fixed wrap;
an orbiting scroll configured to orbit about the fixed scroll and provided with an orbiting wrap forming a compression chamber together with the fixed wrap;
a main frame configured to support the fixed scroll;
a sub-frame arranged inside the main frame to support the orbiting scroll in a position away from a center of the orbiting scroll;
a gap formed between the main frame and the sub-frame to allow the sub-frame to be movable about the main frame;
a sealing member configured to seal at least a portion of the gap between the main frame and the sub-frame to form a chamber between the main frame and the sub-frame; and
a passage configured to guide a refrigerant discharged from the compression chamber, wherein the passage comprises:
a first passage provided in the orbiting scroll to communicate with the compression chamber;
a second passage provided in the main frame to communicate with the chamber; and
a third passage provided in the fixed scroll to connect the first passage to the second passage.

2. The scroll compressor of claim 1 , wherein:
an outlet of the first passage forms a track according to an orbital movement of the orbiting scroll, and
an inlet of the third passage is arranged on the track.

3. The scroll compressor of claim 1 , further comprising:
a rotary shaft to which the orbiting scroll is coupled and by which the orbiting scroll orbits,
wherein the sub-frame is configured to be movable about the main frame in at least one of a first direction extending along the rotary shaft or a second direction orthogonal to the first direction.

4. The scroll compressor of claim 1 , further comprising:
a rotary shaft inserted into a shaft through hole formed in the main frame and coupled to the orbiting scroll to allow the orbiting scroll to orbit,
wherein the main frame comprises a first body portion comprising a fixed scroll support surface configured to support the fixed scroll, and a second body portion positioned below the first body portion and comprising the shaft through hole,
wherein the sub-frame comprises a first body portion arranged inside the first body portion of the main frame, and a second body portion inserted into the shaft through hole to be arranged between the rotary shaft and the second body portion of the main frame, and
wherein a gap is formed between the first body portion of the main frame and the first body portion of the sub-frame and a gap is formed between the second body portion of the main frame and the second body portion of the sub-frame.

5. The scroll compressor of claim 4 , wherein the gap between the first body portion of the main frame and the first body portion of the sub-frame is smaller than the gap between the second body portion of the main frame and the second body portion of the sub-frame.

6. The scroll compressor of claim 4 , wherein the sub-frame is configured to be movable about the main frame,
wherein the sub-frame further comprises a thrust bearing positioned above the first body portion of the sub-frame and comprising an orbiting scroll support surface configured to support the orbiting scroll, and
wherein the thrust bearing has an elastically deformable shape.

7. The scroll compressor of claim 4 , wherein the sub-frame is configured to be movable about the main frame, and
a protrusion configured to be in contact with the first body portion of the sub-frame is formed on an inner surface of the first body portion of the main frame.

8. The scroll compressor of claim 7 , wherein the protrusion of the main frame is in contact with the first body portion of the sub-frame before the second body portion of the main frame is in contact with the second body portion of the sub-frame when the sub-frame is inclined while being moved about the main frame.

9. The scroll compressor of claim 1 , further comprising:
an Oldham ring configured to prevent a pivot of the orbiting scroll,
wherein the Oldham ring is coupled to the orbiting scroll and the sub-frame.

10. The scroll compressor of claim 1 , further comprising:
an Oldham ring configured to prevent a pivot of the orbiting scroll,
wherein the Oldham ring is coupled to the orbiting scroll and the main frame.

11. The scroll compressor of claim 1 , further comprising:
an Oldham ring configured to prevent a pivot of the orbiting scroll,
wherein the Oldham ring is coupled to the orbiting scroll and the fixed scroll.

12. A scroll compressor comprising:
a body;
a fixed scroll fixed to an inside of the body and provided with a fixed wrap;
an orbiting scroll configured to orbit about the fixed scroll and provided with an orbiting wrap forming a compression chamber together with the fixed wrap;
a rotary shaft to which the orbiting scroll is coupled and by which the orbiting scroll orbits;
a main frame configured to support the fixed scroll;
a sub-frame arranged inside the main frame to be spaced apart from the main frame;
a gap formed between the main frame and the sub-frame to allow the sub-frame to be movable about the main frame;
a sealing member configured to seal at least a portion of the sap between the main frame and the sub-frame to form a chamber between the main frame and the sub-frame; and
a passage configured to guide a refrigerant discharged from the compression chamber, wherein the passage comprises:
a first passage provided in the orbiting scroll to communicate with the compression chamber;
a second passage provided in the main frame to communicate with the chamber; and
a third passage provided in the fixed scroll to connect the first passage to the second passage.

13. The scroll compressor of claim 12 , wherein a gap between an upper end of the main frame and an upper end of the sub-frame positioned in an upper side in an axial direction of the rotary shaft is smaller than a gap between a lower end of the main frame and a lower end of the sub-frame positioned in a lower side in the axial direction of the rotary shaft.

14. The scroll compressor of claim 12 , wherein:
the rotary shaft is inserted into a shaft through hole formed in the main frame and coupled to the orbiting scroll,
the main frame comprises a first body portion comprising a fixed scroll support surface configured to support the fixed scroll, and a second body portion positioned below the first body portion and comprising the shaft through hole,
the sub-frame comprises a first body portion arranged inside the first body portion of the main frame, and a second body portion inserted into the shaft through hole to be arranged between the rotary shaft and the second body portion of the main frame, and
a gap between the first body portion of the main frame and the first body portion of the sub-frame is smaller than a gap between the second body portion of the main frame and the second body portion of the sub-frame.

15. The scroll compressor of claim 12 , wherein:
the sub-frame is configured to be movable about the main frame, and
a protrusion configured to be in contact with the sub-frame is formed on an inner surface of the main frame.

16. The scroll compressor of claim 15 , wherein:
the orbiting scroll comprises a plate comprising an orbiting wrap forming surface on which the orbiting wrap is formed,
the sub-frame comprises a first body portion facing the orbiting scroll, and a second body portion positioned below the first body portion to have a width smaller than that of the first body portion, and
the protrusion is formed

Assignees

• Samsung Electronics Co Ltd

Inventors

• Takashi Uekawa
• Cho Yang Hee

Classifications

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C23/008

  Hermetic pumps · CPC title

• F04C29/0021

  Systems for the equilibration of forces acting on the pump (interstice adjustment other than by fluid pressure F01C21/102) · CPC title

• F04C2240/56

  Bearing bushings or details thereof · CPC title

• F04C2240/50

  Bearings · CPC title