Hermetic two-stage compression type compressor

The object of this invention is to provide a hermetic two-stage compression type compressor preventing wear or settling of a buffer ring at the time of heavy load operation or after operation under a overloading operating condition, and having excellent durability, high reliability and high performa...

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Bibliographische Detailangaben
Hauptverfasser:	KOYAMA, SATOSHI, SAKATA, HIROTSUGU, YOSHIDA, MASATOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING WEAPONS
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Beschreibung
Zusammenfassung:	The object of this invention is to provide a hermetic two-stage compression type compressor preventing wear or settling of a buffer ring at the time of heavy load operation or after operation under a overloading operating condition, and having excellent durability, high reliability and high performance. The solution of this invention is as following. In this hermetic two-stage compression type compressor, ball joint type pistons 32, 42 are used in a first compression part 3 and a second compression part 4. Inside of a closed case 2 is set an intermediate-pressure refrigerant atmosphere discharged from the first compression part 3 or a high-pressure refrigerant atmosphere discharged from the second compression part 4. At least, the buffer ring 34 arranged between a ball part 33a and a ball seat 32c of the ball joint type piston 32 of the first compression part 3 is formed of PTFE having a perfluoroalkoxyl group or cross-linked PTFE.