Refrigeration cycle device using refrigerants containing hydrocarbon and sulfur-based odorant
A refrigeration cycle device can include a refrigerant circuit that includes a compressor. A refrigerant can be enclosed in the refrigerant circuit, particularly where the refrigerant can contain a hydrocarbon having 1 to 4 carbon atoms and a sulfur-based odorant. The compressor can be filled with a refrigeration oil, where the refrigeration oil can contain a base oil, and where the ratio of the number of oxygen atoms to the number of carbon atoms in the molecular structure of the base oil is less than 0.50.
1 . A refrigeration cycle device comprising:
a refrigerant circuit comprising a compressor, wherein
a refrigerant is enclosed in the refrigerant circuit,
the refrigerant contains a hydrocarbon having 1 to 4 carbon atoms and a sulfur-based odorant,
a refrigeration oil is stored in the compressor of the refrigerant circuit, the refrigeration oil contains a base oil,
the base oil is an oxygen-containing oil (excluding polyalkylene glycol),
a ratio of a number of oxygen atoms to a number of carbon atoms in a molecular structure of the base oil is less than 0.50,
the sulfur-based odorant is intermixed with the refrigeration oil containing the base oil, and
at least one component of another molecular structure of the base oil has a second ratio of a number of oxygen atoms to a number of carbon atoms greater than 0.50.
2 . The refrigeration cycle device according to claim 1 , wherein the sulfur-based odorant is tetrahydrothiophene, and the refrigerant is propane.
3 . The refrigeration cycle device according to claim 1 , wherein a concentration of the sulfur-based odorant in the refrigerant is 50 ppm by mass or more and less than 1,100 ppm by mass.
4 . The refrigeration cycle device according to claim 1 , wherein the refrigerant includes a non-sulfur-based odorant.
5 . A refrigeration cycle device comprising:
a refrigerant circuit comprising a compressor, wherein
a refrigerant is enclosed in the refrigerant circuit,
the refrigerant contains a hydrocarbon having 1 to 4 carbon atoms and a sulfur-based odorant,
a refrigeration oil is stored in the compressor of the refrigerant circuit,
the refrigeration oil contains a base oil,
the base oil contains polyalkylene glycol represented by the following chemical formula 1:
a ratio of a number of oxygen atoms to a number of carbon atoms in a molecular structure of the base oil is less than 0.50,
wherein m and n are each a numerical value of 0 or more and represent an average of the number of ethylene oxide groups and propylene oxide groups, and R 1 and R 2 are a hydrogen atom or a hydrocarbon chain having one or more carbon atoms,
m and n satisfy the following formula (1) and formula (2):
m
+
n
≤
100
(
1
)
n
/
(
m
+
n
)
≥
0.2
.
(
2
)
the sulfur-based odorant is intermixed with the refrigeration oil containing the base oil, and
at least one component of another molecular structure of the base oil has a second ratio of a number of oxygen atoms to a number of carbon atoms greater than 0.50.
6 . The refrigeration cycle device according to claim 5 , wherein the sulfur-based odorant is tetrahydrothiophene, and the refrigerant is propane.
7 . The refrigeration cycle device according to claim 5 , wherein a concentration of the sulfur-based odorant in the refrigerant is 50 ppm by mass or more and less than 1,100 ppm by mass.
8 . The refrigeration cycle device according to claim 5 , wherein the refrigerant includes a non-sulfur-based odorant.