US 12,345,259 B2
Scroll compressor
Changeol Jo, Seoul (KR); Jeonghun Kim, Seoul (KR); Nara Han, Seoul (KR); and Juhwan Yun, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 18/836,795
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Nov. 17, 2022, PCT No. PCT/KR2022/018240
§ 371(c)(1), (2) Date Aug. 8, 2024,
PCT Pub. No. WO2024/034741, PCT Pub. Date Feb. 15, 2024.
Claims priority of application No. 10-2022-0099477 (KR), filed on Aug. 9, 2022.
Prior Publication US 2025/0146488 A1, May 8, 2025
Int. Cl. F04C 18/02 (2006.01); F04C 28/24 (2006.01)
CPC F04C 18/023 (2013.01) [F04C 28/24 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A scroll compressor comprising:
a casing;
a high/low pressure separation plate that is fixed inside of the casing and divides the inside of the casing into a low-pressure portion forming a suction space and a high-pressure portion forming a discharge space;
a main frame that is fixed inside of the casing and disposed in the low-pressure portion;
an orbiting scroll that is supported on the main frame in an axial direction to perform an orbital motion;
a non-orbiting scroll that is movable in the axial direction with respect to one side surface of the main frame with the orbiting scroll disposed therebetween, and forms a compression chamber together with the orbiting scroll;
a back pressure chamber assembly that is disposed between the high/low pressure separation plate and the non-orbiting scroll and comprises a back pressure chamber formed in an annular shape; and
a back pressure hole that is disposed in the non-orbiting scroll and the back pressure chamber assembly, such that the compression chamber and the back pressure chamber communicate with each other, wherein a back pressure valve is disposed inside of the back pressure hole, the back pressure valve moving along a longitudinal direction of the back pressure hole due to a pressure difference between the compression chamber and the back pressure chamber to vary a passage area of the back pressure hole, wherein the back pressure valve comprises:
a valve body that forms a first refrigerant passage together with an inner circumferential surface of the back pressure hole; and
a plurality of refrigerant movement holes that are formed through an inside of the valve body to form a second refrigerant passage, and wherein the valve body is formed in a spherical shape, and the plurality of refrigerant movement holes are formed to intersect one another.