US 12,286,971 B2
Scroll compressor
Minho Lee, Seoul (KR); Sungyong Ahn, Seoul (KR); Junghoon Park, Seoul (KR); and Seheon Choi, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Mar. 21, 2024, as Appl. No. 18/612,080.
Claims priority of application No. 10-2023-0043614 (KR), filed on Apr. 3, 2023.
Prior Publication US 2024/0328418 A1, Oct. 3, 2024
Int. Cl. F04C 18/02 (2006.01); F04C 29/02 (2006.01)
CPC F04C 18/0215 (2013.01) [F04C 18/0253 (2013.01); F04C 18/0261 (2013.01); F04C 29/02 (2013.01); F04C 29/023 (2013.01); F04C 29/028 (2013.01); F04C 2240/30 (2013.01); F04C 2240/50 (2013.01)] 8 Claims
OG exemplary drawing
 
4. A scroll compressor, comprising:
a casing having an oil storage space therein;
a main frame fixed inside of the casing;
a rotational shaft inserted through the main frame to be supported thereby and having an oil supply hole therein;
an orbiting scroll eccentrically coupled to the rotational shaft and having one side surface axially supported by the main frame;
a fixed scroll disposed on a same side of the main frame as the orbiting scroll interposed therebetween to form a compression chamber together with the orbiting scroll; and
an oil supply guide disposed in at least one of the orbiting scroll or the fixed scroll, the oil supply guide communicating with the oil supply hole to guide oil in the oil storage space to a thrust bearing surface between the orbiting scroll and the fixed scroll, wherein the oil supply guide comprises:
a first oil supply guide disposed in the orbiting scroll and that communicates with the oil supply hole of the rotational shaft; and
a second oil supply guide disposed in at least one of the orbiting scroll or the fixed scroll and that extends along the thrust bearing surface such that the first oil supply guide communicates with the compression chamber having a pressure lower than a pressure in the oil storage space, wherein the orbiting scroll has an orbiting thrust surface that is slidably in contact with a fixed thrust surface of the fixed scroll to define the thrust bearing surface, wherein the second oil supply guide comprises an oil supply extension groove having a first end connected to the first oil supply guide and a second end that communicates with the compression chamber, wherein the oil supply extension groove is recessed by a predetermined depth into the orbiting thrust surface to overlap the fixed thrust surface in an axial direction between ends thereof, wherein at least one oil supply expansion groove is formed between the first and second ends of the oil supply extension groove, and wherein the at least one oil supply expansion groove has a cross-sectional area larger than a cross-sectional area of the oil supply extension groove.