Scroll compressor

Patent metadata

Field	Value
Publication number	US-9879679-B2
Application number	US-201414283187-A
Country	US
Kind code	B2
Filing date	May 20, 2014
Priority date	May 21, 2013
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

A scroll compressor is provided, in which a fixed side discharge opening is formed eccentric from a geometrical center of an orbiting scroll toward an orbiting side discharge opening, so as to overlap the orbiting side discharge opening across a relatively wide area. This may reduce flow resistance between the orbiting side discharge opening and the fixed side discharge opening. Accordingly, a refrigerant compressed in a final compression chamber may be rapidly discharged without being blocked by an upper frame, while maintaining a proper discharge pressure. Since uniform pressure may be maintained in compression chambers positioned at both sides of the scroll compressor, input losses due to over-compression may be reduced.

First claim

What is claimed is:

1. A scroll compressor, comprising:
a hermetic container that defines an inner space;
a fixed scroll provided in the inner space of the hermetic container, the fixed scroll having a fixed wrap;
an orbiting scroll provided in the inner space of the hermetic container, the orbiting scroll having an orbital wrap that is engaged with the fixed wrap of the fixed scroll so as to form a compression chamber therebetween as the orbiting scroll performs an orbital motion with respect to the fixed scroll;
a rotation shaft having an eccentric portion that extends through the fixed scroll and is coupled to a center of the orbiting scroll, wherein the eccentric portion radially overlaps the orbital wrap;
a frame provided in the inner space, at a second side of the orbiting scroll opposite to a first side on which the orbital wrap is formed, and configured to support the orbiting scroll;
an Oldham ring provided between the second side of the orbiting scroll and a surface of the frame facing the second side of the orbiting scroll;
an orbiting side discharge opening formed in the orbiting scroll to communicate with the compression chamber, a position of the orbiting side discharge opening being eccentric from a geometric center of the orbital scroll, and the orbiting side discharge opening guiding refrigerant compressed in the compression chamber into the inner space of the hermetic container;
a fixed side discharge opening formed in the frame, in communication with the orbiting side discharge opening formed in the orbiting scroll, a position of the fixed side discharge opening being eccentric from the geometric center of the orbital scroll and from a geometric center of the frame; and
a seal provided on the second side of the orbiting scroll and configured to form a ring shaped back pressure chamber between the second side of the orbiting scroll and a surface of the frame facing the second side of the orbiting scroll, a geometric center of the seal being eccentric from the geometric center of the orbiting scroll such that a geometric center of the ring shaped back pressure chamber is eccentric from the geometric center of the orbiting scroll so as to be adjacent to a geometric center of the fixed side discharge opening rather than an axial center of the eccentric portion of the rotation shaft.

2. The scroll compressor of claim 1 , wherein the orbiting side discharge opening is formed near an inner end portion of the orbital wrap.

3. The scroll compressor of claim 1 , wherein the fixed side discharge opening is positioned so as to always overlap at least a portion of the orbiting side discharge opening during operation of the scroll compressor.

4. The scroll compressor of claim 3 , wherein the orbiting side discharge opening and the fixed side discharge opening are formed such that respective centers thereof are aligned with each other at least once when the orbiting scroll performs the orbital motion with respect to the fixed scroll.

5. The scroll compressor of claim 1 , wherein a surface of the orbiting scroll includes the orbiting side discharge opening, with an inner diameter of the orbiting side discharge opening being uniform along a length thereof.

6. A scroll compressor, comprising:
an orbiting scroll installed between a fixed scroll and a frame and having a first surface and a second surface opposite the first surface, and engaged with the fixed scroll so as to form at least one compression chamber therebetween, the at least one compression chamber including a discharge chamber that is eccentric from a geometric center of the orbiting scroll, wherein the orbiting scroll includes a rotation shaft coupling portion to which a rotation shaft is coupled;
an Oldham ring provided between the second surface of the orbiting scroll and a surface of the frame facing the second surface of the orbiting scroll;
a first discharge opening formed at the orbiting scroll, in communication with the discharge chamber wherein a position of the first discharge opening is outside of an area of the orbiting scroll where the rotation shaft coupling portion is formed;
a second discharge opening formed at the frame, in communication with the first discharge opening, wherein the first discharge opening and the second discharge opening are formed at positions such that the first discharge opening and the second discharge opening always at least partially overlap each other; and
at least one seal provided on the second surface of the orbiting scroll and configured to form a ring-shaped back pressure chamber between the second surface of the orbiting scroll and the surface of the frame facing the second surface of the orbiting scroll,
wherein the first discharge opening and the second discharge opening are formed at an inner side of the back pressure chamber, wherein a position of the second discharge opening is eccentric from a geometric center of the frame, and wherein a geometric center of the at least one seal is eccentric from the geometric center of the orbiting scroll such that a geometric center of the ring shaped back pressure chamber is eccentric from the geometric center of the orbiting scroll so as to be adjacent to a geometric center of the discharge chamber rather than the geometric center of the orbiting scroll.

7. The scroll compressor of claim 6 , wherein the first discharge opening and the second discharge opening are formed so as to be concentric with each other at least once when the orbiting scroll performs the orbital motion.

Assignees

• Lg Electronics Inc

Inventors

• Lee Jaesang
• Lee Kangwook
• Won Inho

Classifications

• F04C18/0215

  where only one member is moving · CPC title

• F04C23/008

  Hermetic pumps · CPC title

• F04C29/12 Primary

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04C18/0261

  Details of the ports, e.g. location, number, geometry · CPC title

• F04C14/18 Primary

  characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C14/10) · CPC title