Compressor
A compressor of an embodiment includes a sealed container and a compression mechanism part configured to compress a refrigerant within the sealed container. The refrigerant is an unsaturated refrigerant or a mixed refrigerant containing an unsaturated refrigerant. The compression mechanism part contains chromium. The compression mechanism part includes a first member and a second member. The first member and the second member slide relative to each other. A blend layer containing chromium nitride and titanium nitride is formed on a surface of the first member. The titanium nitride in the blend layer is distributed such that a concentration of the titanium nitride increases and decreases regularly in a thickness direction of the blend layer. Carbide is precipitated on a surface of the second member.
1 . A compressor comprising:
a sealed container; and
a compression mechanism part configured to compress a refrigerant within the sealed container, wherein
the refrigerant is an unsaturated refrigerant or a mixed refrigerant containing an unsaturated refrigerant,
the compression mechanism part contains chromium,
the compression mechanism part includes a first member and a second member,
the first member and the second member slide relative to each other,
a blend layer containing chromium nitride and titanium nitride is formed on a surface of the first member,
the titanium nitride in the blend layer is distributed such that a concentration of the titanium nitride increases and decreases regularly in a thickness direction of the blend layer, and
carbide is precipitated on a surface of the second member.
2 . The compressor according to claim 1 , wherein
a concentration of the titanium nitride in a cross-sectional region perpendicular to the thickness direction of the blend layer increases and decreases in a range of 0 to 5.0% by mass in the thickness direction of the blend layer.
3 . The compressor according to claim 1 , wherein
a refrigeration oil having a phosphorus-containing anti-wear agent blended therein is contained within the sealed container.
4 . The compressor according to claim 1 , being a rotary compressor, the rotary compressor including:
a blade serving as the first member; and
a roller serving as the second member.
5 . A compressor comprising:
a sealed container; and
a compression mechanism part configured to compress a refrigerant within the sealed container, wherein
the refrigerant is carbon dioxide or a mixed refrigerant containing carbon dioxide,
the compression mechanism part contains chromium,
the compression mechanism part includes a first member and a second member,
the first member and the second member slide relative to each other,
a blend layer containing chromium nitride and titanium nitride is formed on a surface of the first member,
the titanium nitride in the blend layer is distributed such that a concentration of the titanium nitride increases and decreases regularly in a thickness direction of the blend layer, and
carbide is precipitated on a surface of the second member.
6 . The compressor according to claim 5 , wherein
a concentration of the titanium nitride in a cross-sectional region perpendicular to the thickness direction of the blend layer increases and decreases in a range of 0 to 5.0% by mass in the thickness direction of the blend layer.
7 . The compressor according to claim 5 , wherein
a refrigeration oil having a phosphorus-containing anti-wear agent blended therein is contained within the sealed container.
8 . The compressor according to claim 5 , being a rotary compressor, the rotary compressor including:
a blade serving as the first member; and
a roller serving as the second member.
9 . A compressor comprising:
a sealed container; and
a compression mechanism part configured to compress a refrigerant within the sealed container, wherein
the refrigerant is a hydrocarbon or a mixed refrigerant containing a hydrocarbon,
the compression mechanism part contains chromium,
the compression mechanism part includes a first member and a second member,
the first member and the second member slide relative to each other,
a blend layer containing chromium nitride and titanium nitride is formed on a surface of the first member,
the titanium nitride in the blend layer is distributed such that a concentration of the titanium nitride increases and decreases regularly in a thickness direction of the blend layer, and
carbide is precipitated on a surface of the second member.
10 . The compressor according to claim 9 , wherein
a concentration of the titanium nitride in a cross-sectional region perpendicular to the thickness direction of the blend layer increases and decreases in a range of 0 to 5.0% by mass in the thickness direction of the blend layer.
11 . The compressor according to claim 9 , wherein
a refrigeration oil having a phosphorus-containing anti-wear agent blended therein is contained within the sealed container.
12 . The compressor according to claim 9 , being a rotary compressor, the rotary compressor including:
a blade serving as the first member; and
a roller serving as the second member.