MULTISTAGE COMPRESSION SYSTEM

In a refrigeration apparatus using a plurality of multistage compressors, it has been necessary to keep an appropriate amount of refrigerator oil in each of the plurality of multistage compressors. When oil discharged by a high-stage compressor is returned to a refrigerant suction side of a low-stag...

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Bibliographische Detailangaben
Hauptverfasser:	TOMIOKA, Naoto, NISHIDE, Yohei, OKAMOTO, Daisuke, KAJIWARA, Mikio, ADACHI, Masaaki, OHNISHI, Yousuke
Format:	Patent
Sprache:	eng ; fre ; ger
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 ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS WEAPONS
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Beschreibung
Zusammenfassung:	In a refrigeration apparatus using a plurality of multistage compressors, it has been necessary to keep an appropriate amount of refrigerator oil in each of the plurality of multistage compressors. When oil discharged by a high-stage compressor is returned to a refrigerant suction side of a low-stage compressor, a heat loss and a pressure loss occur, thereby reducing efficiency of a system. A multistage compression system (20) has a low-stage compressor (21), a high-stage compressor (23), and an oil return pipe (31). The low-stage compressor (21) has a compression part (50), a motor (40), and a container (30). The container (30) houses the compression part (50) and the motor (40). The oil return pipe (31) is connected to a space below the motor (40) inside the container (30).