Closed-type compressor
First Claim
1. A closed-type compressor which comprises a closed casing accommodating an electric motor from which a rotational shaft extends and a compressing machine to be operated by the motor, the compressing machine being provided with a sliding portion, wherein a hydrofluorocarbon (HFC) refrigerant is used as a compressor refrigerant, wherein a refrigerator oil consisting essentially of ester is used as a lubricating oil and wherein the sliding portion of the compressing machine is formed of two members, one of which is made of cast iron subjected to an insoluble film forming process using manganese phosphate and another one of which is made of carbon steel.
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Accused Products
Abstract
A closed-type compressor includes a closed casing accommodating an electric motor from which a rotational shaft extends and a compressing machine to be operated by the motor and the compressing machine is of a reciprocating-type and provided with sliding portions. A hydrofluorocarbon (HFC) refrigerant is used as a compressor refrigerant, and a refrigerator oil consisting essentially of ester is used as a lubricating oil. The sliding portions of the compressing machine each is formed of two members one of which is made of cast iron subjected to an insoluble film forming process using manganese phosphate and another one of which is made of carbon steel.
26 Citations
14 Claims
- 1. A closed-type compressor which comprises a closed casing accommodating an electric motor from which a rotational shaft extends and a compressing machine to be operated by the motor, the compressing machine being provided with a sliding portion, wherein a hydrofluorocarbon (HFC) refrigerant is used as a compressor refrigerant, wherein a refrigerator oil consisting essentially of ester is used as a lubricating oil and wherein the sliding portion of the compressing machine is formed of two members, one of which is made of cast iron subjected to an insoluble film forming process using manganese phosphate and another one of which is made of carbon steel.
- 6. A closed-type compressor which comprises a closed casing accommodating an electric motor from which a rotational shaft extends and a compressing machine to be operated by said motor, said compressing machine being provided with sliding portions, wherein a hydrofluorocarbon (HFC) refrigerant is used as a compressor refrigerant, wherein a refrigerator oil consisting essentially of ester is used as a lubricating oil, and wherein each of the sliding portions of the compressing machine is formed of two members, one of which is made of cast iron subjected to a nitriding treatment and to an insoluble film forming treatment using manganese phosphate and another one of which is made of a carbon steel not subjected to any treatment.
- 11. A closed-type compressor which comprises a closed casing accommodating an electric motor from which a rotational shaft extends and a compressing machine to be operated by the motor, the compressing machine being provided with a sliding portion, wherein a hydrofluorocarbon (HFC) refrigerant is used as a compressor refrigerant, wherein a refrigerator oil consisting essentially of ester is used as a lubricating oil and wherein said compressing machine is of a reciprocating-type provided with a piston-cylinder assembly in which the sliding portion of the compressing machine is formed of two members, one of which is a cylinder member of the piston-cylinder assembly made of cast iron subjected to an insoluble film forming treatment using manganese phosphate and another one of which is a piston member of the piston-cylinder assembly made of carbon steel, said piston member including a piston spherical seat portion subjected to a nitriding treatment and then subjected to an insoluble film forming treatment using manganese phosphate, said piston spherical seat portion being engaged with a connection rod operatively connected to the rotational shaft, said connection rod having one end which is of a diameter smaller than another end thereof and made of a carbon steel not subjected to any treatment.
Specification