US 12,000,395 B2
Scroll compressor and refrigeration cycle device
Kazuyuki Matsunaga, Tokyo (JP); and Ryota Iijima, Tokyo (JP)
Assigned to HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC., Tokyo (JP)
Filed by Hitachi-Johnson Controls Air Conditioning, Inc., Tokyo (JP)
Filed on Sep. 2, 2022, as Appl. No. 17/901,944.
Claims priority of application No. 2021-143695 (JP), filed on Sep. 3, 2021.
Prior Publication US 2023/0077032 A1, Mar. 9, 2023
Int. Cl. F04C 18/02 (2006.01); F04C 29/02 (2006.01)
CPC F04C 18/0261 (2013.01) [F04C 18/0215 (2013.01); F04C 18/0253 (2013.01); F04C 29/023 (2013.01); F04C 2240/603 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A scroll compressor comprising:
a hermetic container;
an electric motor having a stator and a rotor and housed in the hermetic container;
a shaft having an oil supply path in which lubricant oil flows and rotating integrally with the rotor;
a fixed scroll having a spiral fixed wrap;
a revolving scroll having a spiral revolving wrap and provided such that a compression chamber is formed between the fixed wrap and the revolving wrap; and
a frame having an insertion hole for the shaft and supporting the fixed scroll,
wherein a back pressure chamber is provided between the revolving scroll and the frame,
at an end plate surface of the fixed scroll, an annular back pressure groove connected to the back pressure chamber is provided, and an arc-shaped first groove and an arc-shaped second groove are provided inside the back pressure groove in a radial direction,
a distance between the second groove and the back pressure groove is shorter than a distance between the first groove and the back pressure groove,
the revolving scroll is provided with a first hole and a second hole for guiding the lubricant oil from the oil supply path to an end plate surface side of the fixed scroll,
at least part of a movement locus of an opening of the first hole is included in the first groove,
at least part of a movement locus of an opening of the second hole is included in the second groove, and
the first groove and the second groove at least partially overlap with each other in the radial direction.
 
10. A scroll compressor comprising:
a hermetic container;
an electric motor having a stator and a rotor and housed in the hermetic container;
a shaft having an oil supply path in which lubricant oil flows and rotating integrally with the rotor;
a fixed scroll having a spiral fixed wrap;
a revolving scroll having a spiral revolving wrap and provided such that a compression chamber is formed between the fixed wrap and the revolving wrap; and
a frame having an insertion hole for the shaft and supporting the fixed scroll,
wherein a back pressure chamber is provided between the revolving scroll and the frame,
at an end plate surface of the fixed scroll, an annular back pressure groove connected to the back pressure chamber is provided, and an arc-shaped first groove and an arc-shaped second groove are provided inside the back pressure groove in a radial direction,
a distance between the second groove and the back pressure groove is shorter than a distance between the first groove and the back pressure groove,
the revolving scroll is provided with a first hole and a second hole for guiding the lubricant oil from the oil supply path to an end plate surface side of the fixed scroll,
at least part of a movement locus of an opening of the first hole is included in the first groove,
at least part of a movement locus of an opening of the second hole is included in the second groove, and
a connection hole connected to the oil supply path and connected to both of the first hole and the second hole is provided at the revolving scroll.