US 12,253,083 B2
Rotary compressor
Bumdong Sa, Seoul (KR); Seseok Seol, Seoul (KR); and Seokhwan Moon, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/926,210
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Apr. 15, 2021, PCT No. PCT/KR2021/004733
§ 371(c)(1), (2) Date Nov. 18, 2022,
PCT Pub. No. WO2021/235703, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 10-2020-0061623 (KR), filed on May 22, 2020.
Prior Publication US 2023/0184250 A1, Jun. 15, 2023
Int. Cl. F04C 18/344 (2006.01)
CPC F04C 18/344 (2013.01) [F04C 2210/12 (2013.01); F04C 2240/20 (2013.01); F04C 2240/50 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A rotary compressor, comprising:
a cylinder;
a chamber eccentrically formed in the cylinder and accommodating a predetermined working fluid;
a rotor rotatably disposed in the chamber and disposed concentrically to the cylinder;
first and second bearings that are disposed above and below the cylinder to seal the chamber, respectively and support a drive shaft of the rotor;
a plurality of vanes movably installed in the rotor in a radial direction of the rotor and protruding to an inner circumferential surface of the cylinder from the rotor to divide the chamber into a plurality of compressed spaces;
first and second guide grooves formed concentrically to the chamber on surfaces of the first and second bearings facing the chamber, to accommodate portions of the plurality of vanes and continuously guiding the plurality of vanes to protrude to the inner circumferential surface of the cylinder while the rotor rotates; and
an auxiliary bearing provided in at least one of the first guide groove or the second guide groove and rotating with the plurality of vanes, wherein the auxiliary bearing further includes a cover that isolates the auxiliary bearing from the chamber.