| CPC F04C 18/0215 (2013.01) [F04C 18/0253 (2013.01); F04C 18/0261 (2013.01); F04C 28/26 (2013.01); F04C 28/265 (2013.01); F04C 29/12 (2013.01); F04C 29/128 (2013.01)] | 16 Claims |
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1. 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.
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