Compressor and refrigeration cycle apparatus
AssigneeDaikin Industries, Ltd.
InventorsArisa Kira, Masaru Tanaka, Hideki Matsuura
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Abstract
A compressor is a compressor for a refrigeration cycle apparatus that performs a refrigeration cycle using a refrigerant containing a hydrofluoroolefin and a refrigeration oil containing a polyol ester or a polyvinyl ether. The compressor includes a sliding portion. The sliding portion is formed of an aluminum alloy containing from 5 wt % to 25 wt % of silicon. The refrigeration oil contains an acid scavenger or an oxygen scavenger and satisfies the following relational formula: total content (wt %) of acid scavenger and oxygen scavenger in refrigeration oil≥(2.3+2.6×(hydrofluoroolefin content (wt %) in refrigerant)−1.6×(silicon content (wt %) in sliding portion))/100.
Claims7
A compressor for a refrigeration cycle apparatus that performs a refrigeration cycle using a refrigerant and a refrigeration oil, the refrigerant containing a hydrofluoroolefin and the refrigeration oil containing a polyol ester or a polyvinyl ether, the compressor comprising:
- a sliding portion comprising an aluminum alloy containing from 7 wt % to 20 wt % of silicon,
- wherein the refrigeration oil contains an acid scavenger and an oxygen scavenger, the total content of acid scavenger and oxygen scavenger in the refrigeration oil being 1.1 wt % to 3.6 wt %,
- the hydrofluoroolefin content in the refrigerant is 30 wt % to 100 wt %,
- the acid scavenger includes one or more epoxy compounds,
- the oxygen scavenger includes one or more compounds selected from a group consisting of sulfur-containing aromatic compounds, aliphatic unsaturated compounds, and terpenes having a double bond, and
- the refrigeration oil satisfies the following relational formula:
- total
-
- content
-
- (
- wt
-
- %
- )
-
-
- of
-
- acid
-
-
- scavenger
-
- and
-
- oxygen
-
- scavenger
-
- in
-
- refrigeration
-
- oil
- ≥
- (
- 2.3
- +
- 2.6
- ×
- (
- hydrofluoroolefin
-
- content
-
- (
- wt
-
- %
- )
-
- in
-
- refrigerant
- )
- -
- 1.6
- ×
- (
- silicon
-
- content
-
- (
- wt
-
-
- %
- )
-
- in
-
- sliding
-
- portion
- )
- )
- /
- 100.
Dependencies are inferred from the claim text.