Scroll compressor
View Patent ↗Provided is a scroll compressor capable of ensuring reliability of a release valve device. The scroll compressor is provided with: an orbiting scroll having an orbiting scroll wrap; a fixed roll having a fixed scroll wrap intermeshing with the orbiting scroll wrap; a release hole formed in the fixed scroll; a housing hole communicating with the release hole and having larger diameter than that of the release hole; a valve seat member which is housed in the housing hole and has a valve seat surface; a valve plate contacting with or separating from the valve seat surface by a pressure difference; a spring for pressing the valve plate against the valve seat surface; a stopper which is equipped with the spring and secures the valve seat member; and a retainer for securing the stopper.
1. A scroll compressor comprising:
an orbiting scroll having an orbiting scroll wrap;
a fixed scroll having a fixed scroll wrap intermeshing with the orbiting scroll wrap;
a release hole disposed in the fixed scroll;
a housing hole communicating with the release hole and having a larger diameter than that of the release hole;
a valve seat member which is housed in the housing hole and has a valve seat surface;
a valve plate contacting with or separating from the valve seat surface by a pressure difference;
a spring for pressing the valve plate against the valve seat surface;
a stopper supporting the spring and securing the valve seat member; and
a retainer for securing the stopper,
wherein a hardness of the valve seat member is higher than that of the fixed scroll, and
wherein the stopper has a cylindrical portion in contact with the valve seat member and has a cutout portion in the cylindrical portion.
2. A scroll compressor comprising:
an orbiting scroll having an orbiting scroll wrap;
a fixed scroll having a fixed scroll wrap intermeshing with the orbiting scroll wrap;
a release hole disposed in the fixed scroll;
a housing hole communicating with the release hole and having a larger diameter than that of the release hole;
a valve seat member which is housed in the housing hole and has a valve seat surface;
a valve plate contacting with or separating from the valve seat surface by a pressure difference;
a first spring for pressing the valve plate against the valve seat surface;
a stopper supporting the first spring and securing the valve seat member;
a second spring for pressing the stopper; and
a retainer for pressing the second spring,
wherein a hardness of the valve seat member is higher than that of the fixed scroll.
3. A scroll compressor comprising:
an orbiting scroll having an orbiting scroll wrap;
a fixed scroll having a fixed scroll wrap intermeshing with the orbiting scroll wrap;
a release hole disposed in the fixed scroll;
a housing hole communicating with the release hole and having a larger diameter than that of the release hole;
a valve seat member which is housed in the housing hole and has a valve seat surface;
a valve plate contacting with or separating from the valve seat surface by a pressure difference;
a first spring for pressing the valve plate against the valve seat surface;
a stopper supporting the first spring;
a second spring disposed between the stopper and the valve seat member; and
a retainer for securing the stopper,
wherein a hardness of the valve seat member is higher than that of the fixed scroll.
4. The scroll compressor according to claim 1 ,
wherein the valve seat member has a protrusion, and
wherein the stopper has a cylindrical portion in contact with the valve seat member, and the cylindrical portion has a groove into which the protrusion is pressed.
5. The scroll compressor according to claim 1 ,
wherein a material of the fixed scroll and the orbiting scroll is an aluminum alloy or a magnesium alloy.
6. The scroll compressor according to claim 1 ,
wherein a material of the valve seat member has a Vickers hardness equal to or more than 250.
7. The scroll compressor according to claim 1 ,
wherein the material of the valve seat member is one of a molding material, a steel material, a sintered material subjected to steam treatment, a molding material subjected to nitriding treatment, a steel material subjected to nitriding treatment, a sintered material subjected to steam treatment and nitriding treatment, and a steel material subjected to carburizing quenching treatment.
8. The scroll compressor according to claim 1 ,
wherein the release hole communicates with a compression chamber, and
wherein the housing hole communicates with a discharge pressure chamber.
9. The scroll compressor according to claim 1 ,
wherein the release hole communicates with a back pressure chamber, and
wherein the housing hole communicates with a compression chamber.
10. The scroll compressor according to claim 2 ,
wherein the stopper has a cylindrical portion in contact with the valve seat member and has a cutout portion in the cylindrical portion.
11. The scroll compressor according to claim 2 ,
wherein the valve seat member has a protrusion, and
wherein the stopper has a cylindrical portion in contact with the valve seat member, and the cylindrical portion has a groove into which the protrusion is pressed.