US 12,221,591 B2
Refrigeration cycle apparatus
Kenji Kojima, Tokyo (JP); Kengo Hiratsuka, Tokyo (JP); Satoru Toyama, Tokyo (JP); and Manami Nakamura, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/008,668
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Jul. 21, 2020, PCT No. PCT/JP2020/028233
§ 371(c)(1), (2) Date Dec. 7, 2022,
PCT Pub. No. WO2022/018821, PCT Pub. Date Jan. 27, 2022.
Prior Publication US 2023/0242833 A1, Aug. 3, 2023
Int. Cl. C10M 129/20 (2006.01); C09K 5/04 (2006.01); C10M 129/70 (2006.01); C10M 145/26 (2006.01); C10M 161/00 (2006.01); C10M 169/04 (2006.01); C10N 30/04 (2006.01); C10N 40/30 (2006.01)
CPC C10M 169/044 (2013.01) [C09K 5/044 (2013.01); C10M 129/20 (2013.01); C10M 129/70 (2013.01); C10M 145/26 (2013.01); C10M 161/00 (2013.01); C09K 2205/122 (2013.01); C09K 2205/24 (2013.01); C10M 2207/044 (2013.01); C10M 2207/2835 (2013.01); C10M 2207/284 (2013.01); C10M 2209/103 (2013.01); C10N 2030/04 (2013.01); C10N 2040/30 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A refrigeration cycle apparatus comprising:
a refrigeration circuit, the refrigeration circuit including a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an expansion valve, wherein
a refrigerant is sealed within the refrigeration circuit,
the refrigerant contains trifluoroiodomethane,
the compressor is filled with a refrigerator oil,
the refrigerator oil contains at least one of a first compound represented by the following chemical formula 1 and a second compound represented by the following chemical formula 2:

OG Complex Work Unit Chemistry
in the chemical formula 1,
each of R1 to R5 is a substituent composed of at least one of carbon atom, hydrogen atom, and oxygen atom, and
at least one of R6 to R8 is a hydrogen atom with the remainder being a substituent composed of at least one of carbon atom, hydrogen atom, and oxygen atom, and
in the chemical formula 2,
R1 is a substituent forming a ring structure with neighboring carbon atoms,
the ring structure is a 5- to 8-membered carbon ring or heterocyclic ring,
each of R2 to R5 is a substituent composed of at least one of carbon atom, hydrogen atom, and oxygen atom, and
at least one of R6 to R7 is a hydrogen atom with the remainder being a substituent composed of at least one of carbon atom, hydrogen atom, and oxygen atom.