US 2015/0316057 A1 · SCROLL COMPRESSOR

Abstract

A scroll compressor is provided that may include a casing including a rotational shaft, a cover fixed 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 disposed on or at one side of the first scroll to define a compression chamber together with the first scroll, the second scroll including a discharge, through which a refrigerant pressed in the compression chamber may be discharged, a switching device movably disposed on or at one side of the discharge to selectively open and close the discharge, a back pressure portion including a moving guide that accommodates at least a portion of the switching device, and a top surface that covers one side of the switching device; and an adhesion preventer that reduces a contact area between the switching device and at least a portion of the back pressure portion.

Claims32

Dependent claims

A scroll compressor, comprising:

a casing comprising a rotational shaft;
a cover fixed inside of the casing to partition an inner space of the casing into a suction space and a discharge space;
a first scroll that is revolved by rotation of the rotational shaft;
a second scroll disposed on or at one side of the first scroll to define a compression chamber together with the first scroll, wherein the second scroll comprises a discharge hole through which a refrigerant compressed in the compression chamber is discharged;
a switching device movably disposed on or at one side of the discharge hole to selectively open and close the discharge hole;
a back pressure portion comprising a moving guide that accommodates at least a portion of the switching device and a top surface that covers one side of the switching device;
and
an adhesion preventer to reduce a contact area between the switching device and at least a portion of the back pressure portion.

5 more elements

A scroll compressor, comprising:

a casing comprising a rotational shaft;
a cover fixed inside the casing to partition an inner space of the casing into a suction space and a discharge space;
a first scroll that is revolved by rotation of the rotational shaft;
a second scroll disposed on or at one side of the first scroll to define a compression chamber together with the first scroll, wherein the second scroll comprises a discharge hole through which a refrigerant compressed in the compression chamber is discharged;
and
a back pressure portion coupled to the second scroll, wherein the back pressure portion comprises:
a support supported by the second scroll, the support having an annular shape;
a first wall that extends from an inner circumferential surface of the support;
a second wall spaced inward from the first wall;
a top surface disposed on an upper portion of the second wall, the top surface having a discharge pressure apply hole to which a pressure of a refrigerant in the discharge space is applied;
at least one intermediate discharge hole disposed between the first wall and the second wall to allow the refrigerant discharged from the discharge hole to flow therethrough;
and
a protrusion that protrudes from the top surface to surround the discharge pressure apply hole.

10 more elements

Dependencies are inferred from the claim text.

Scroll compressor

Life of this patent

Scroll compressor

Life of this patent

Abstract

Claims32