Refrigeration cycle apparatus

Patent metadata

Field	Value
Publication number	US-12221591-B2
Application number	US-202018008668-A
Country	US
Kind code	B2
Filing date	Jul 21, 2020
Priority date	Jul 21, 2020
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

A refrigeration cycle apparatus including 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, and 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:

First claim

The invention claimed is:

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:

in the chemical formula 1,
each of R 1 to R 5 is a substituent composed of at least one of carbon atom, hydrogen atom, and oxygen atom, and
at least one of R 6 to R 8 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,
R 1 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 R 2 to R 5 is a substituent composed of at least one of carbon atom, hydrogen atom, and oxygen atom, and
at least one of R 6 to R 7 is a hydrogen atom with the remainder being a substituent composed of at least one of carbon atom, hydrogen atom, and oxygen atom.

2. The refrigeration cycle apparatus according to claim 1 , wherein a content of trifluoroiodomethane in the refrigerant is from 1 to 70 mass % relative to a total amount of the refrigerant.

3. The refrigeration cycle apparatus according to claim 1 , wherein, in the chemical formula 1,
R 7 is —COO—R 10 , and
R 10 is a hydrocarbon group having 1 to 10 carbon atoms.

4. The refrigeration cycle apparatus according to claim 1 , wherein, in the chemical formula 1,
R 3 is —O—R 9 , and
R 9 is a hydrocarbon group having 1 to 10 carbon atoms.

5. The refrigeration cycle apparatus according to claim 1 , wherein, in the chemical formula 1,
each of R 1 to R 2 , R 4 to R 6 , and R 8 is a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.

6. The refrigeration cycle apparatus according to claim 1 , wherein, in the chemical formula 2,
each of R 2 to R 6 is a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.

7. The refrigeration cycle apparatus according to claim 1 , wherein the second compound is a compound represented by the following chemical formula 4

8. The refrigeration cycle apparatus according to claim 1 , wherein the refrigerator oil contains a dissolution aid.

9. The refrigeration cycle apparatus according to claim 8 , wherein the dissolution aid is polyalkylene glycol.

Assignees

• Mitsubishi Electric Corp

Inventors

• Kojima Kenji
• Hiratsuka Kengo
• Toyama Satoru
• Nakamura Manami

Classifications

• C10N2040/30

  Refrigerators lubricants {or compressors lubricants} · CPC title

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10M2209/103

  Polyethers, i.e. containing di- or higher polyoxyalkylene groups · CPC title

• C10M2207/284

  of aromatic monocarboxylic acids · CPC title

• C10M2207/2835

  used as base material · CPC title