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US 12,071,947 B2Granted
Scroll compressor
AssigneeLG Electronics Inc.
InventorsJaesang Lee, Sanghun Seong, Honghee Park, Sooho Jang
Life of this patent
Estimating the term…
Abstract
In a scroll compressor, a discharge chamber is provided in an inner space of a back pressure chamber inner wall, a discharge port is provided inside the discharge chamber, a bypass hole is provided around the discharge port, and a communicating recess portion allowing the discharge chamber to communicate with the bypass hole is provided on an inner circumferential surface of the back pressure chamber inner wall forming the discharge chamber. Through this, the bypass hole may be easily configured in addition to the discharge port, thereby increasing an operation range of the compressor and suppressing overcompression.
Claims16
A scroll compressor comprising:
- an orbiting scroll including an orbiting wrap positioned at a surface of an orbiting end plate, the orbiting scroll being coupled to a rotation shaft;
- and
- a non-orbiting scroll including:
- a non-orbiting wrap positioned at a surface of a non-orbiting end plate, the non-orbiting wrap being configured to engage the orbiting wrap to thereby define a compression chamber,
- a back pressure chamber part defining a back pressure chamber at an opposite surface of the non-orbiting end plate, and
- a discharge chamber defined at the back pressure chamber part and being in fluid communication with the compression chamber,
- wherein a discharge port is defined at the non-orbiting scroll and enables fluid communication between the compression chamber and the discharge chamber, and
- wherein a bypass hole is defined around the discharge port and enables fluid communication between a first portion of the compression chamber and the discharge chamber, the first portion of the compression chamber having a pressure lower than a pressure of a second portion of the compression chamber that is in fluid communication with the discharge port,
- wherein a communicating recess portion is provided at an inner circumferential surface of the discharge chamber and enables fluid communication between the discharge chamber and the bypass hole,
- wherein a bypass valve is provided inside the bypass hole and configured to open and close the bypass hole,
- wherein the bypass valve includes:
- a fixed member inserted into the bypass hole, and
- a valve member located between the fixed member and the communicating recess portion and configured to, based on a pressure difference between the compression chamber and the discharge chamber, move in an axial direction and be detachably attached to the fixed member to thereby selectively open and close the bypass hole,
- wherein a fixed discharge passage is provided at the fixed member and extends in the axial direction,
- wherein a valve discharge passage is provided at the valve member and configured to be selectively in fluid communication with the fixed discharge passage,
- wherein the valve discharge passage includes:
- a valve discharge port penetrating from a first side of the valve member facing the fixed member to a second side of the valve member, and
- a valve discharge recess extending from the valve discharge port to an outer circumferential surface of the valve member toward the discharge chamber, and
- wherein an axial thickness of the valve member is greater than or equal to an axial height of the communicating recess portion.
16 more elements
A scroll compressor comprising:
- an orbiting scroll including an orbiting wrap positioned at a surface of an orbiting end plate, the orbiting scroll being coupled to a rotation shaft;
- and
- a non-orbiting scroll including:
- a non-orbiting wrap positioned at a surface of a non-orbiting end plate, the non-orbiting wrap being configured to engage the orbiting wrap to thereby define a compression chamber,
- a back pressure chamber part defining a back pressure chamber at an opposite surface of the non-orbiting end plate, and
- a discharge chamber defined at the back pressure chamber part and being in fluid communication with the compression chamber,
- wherein a discharge port is defined at the non-orbiting scroll and enables fluid communication between the compression chamber and the discharge chamber,
- wherein a bypass hole is defined around the discharge port and enables fluid communication between a first portion of the compression chamber and the discharge chamber, the first portion of the compression chamber having a pressure lower than a pressure of a second portion of the compression chamber that is in fluid communication with the discharge port,
- wherein a communicating recess portion is provided at an inner circumferential surface of the discharge chamber and enables fluid communication between the discharge chamber and the bypass hole,
- wherein a bypass valve is provided inside the bypass hole and configured to open and close the bypass hole,
- wherein the bypass valve includes:
- a fixed member inserted into the bypass hole, and
- a valve member located between the fixed member and the communicating recess portion and configured to, based on a pressure difference between the compression chamber and the discharge chamber, move in an axial direction and be detachably attached to the fixed member to thereby selectively open and close the bypass hole,
- wherein a fixed discharge passage is provided at the fixed member and extends in the axial direction,
- wherein a valve discharge passage is provided at the valve member and configured to be selectively in fluid communication with the fixed discharge passage,
- wherein the fixed discharge passage includes:
- a fixed discharge port being open at a first end toward the compression chamber and extending through the fixed member in the axial direction,
- wherein a fixed discharge recess is defined in the axial direction at a surface of the fixed member facing the valve member and a second end of the fixed discharge port is in fluid communication with the fixed discharge recess to be opened and closed by the valve member,
- wherein the fixed discharge port includes a plurality of fixed discharge ports that are spaced apart from each other at a predetermined distance along a main surface of the non-orbiting wrap,
- wherein the fixed discharge recess has an annular shape, each of the plurality of fixed discharge ports being in fluid communication with the fixed discharge recess, and
- wherein, in the fixed member, an opening/closing protrusion is provided along a same axial line as the valve discharge passage and configured to open and close the valve discharge passage, the opening/closing protrusion having a same height as a surface of the fixed member facing the valve member inside the fixed discharge recess.
18 more elements
A scroll compressor comprising:
- an orbiting scroll including an orbiting wrap positioned at a surface of an orbiting end plate, the orbiting scroll being coupled to a rotation shaft;
- and
- a non-orbiting scroll including:
- a non-orbiting wrap positioned at a surface of a non-orbiting end plate, the non-orbiting wrap being configured to engage the orbiting wrap to thereby define a compression chamber,
- a back pressure chamber part defining a back pressure chamber at an opposite surface of the non-orbiting end plate, and
- a discharge chamber defined at the back pressure chamber part and being in fluid communication with the compression chamber,
- wherein a discharge port is defined at the non-orbiting scroll and enables fluid communication between the compression chamber and the discharge chamber,
- wherein a bypass hole is defined around the discharge port and enables fluid communication between a first portion of the compression chamber and the discharge chamber, the first portion of the compression chamber having a pressure lower than a pressure of a second portion of the compression chamber that is in fluid communication with the discharge port,
- wherein a communicating recess portion is provided at an inner circumferential surface of the discharge chamber and enables fluid communication between the discharge chamber and the bypass hole,
- wherein a bypass valve is provided inside the bypass hole and configured to open and close the bypass hole,
- wherein the bypass valve includes:
- a fixed member inserted into the bypass hole, and
- a valve member located between the fixed member and the communicating recess portion and configured to, based on a pressure difference between the compression chamber and the discharge chamber, move in an axial direction and be detachably attached to the fixed member to thereby selectively open and close the bypass hole,
- wherein a fixed discharge passage is provided at the fixed member and extends in the axial direction,
- wherein a valve discharge passage is provided at the valve member and configured to be selectively in fluid communication with the fixed discharge passage,
- wherein the valve discharge passage includes:
- a valve discharge port penetrating from a first side of the valve member facing the fixed member to a second side of the valve member, and
- a valve discharge recess extending from the valve discharge port to an outer circumferential surface of the valve member toward the discharge chamber, and
- wherein the valve discharge recess is depressed in the axial direction from the second side of the valve member.
16 more elements
Dependencies are inferred from the claim text.