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. A multistage compression system (20) has a low-stage compressor (21), a high-stage compressor (23), re...

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Bibliographische Detailangaben
Hauptverfasser:	TOMIOKA, Naoto, UENO, Akitoshi, HORITA, Takuya, NISHIDE, Yohei, OKAMOTO, Daisuke, TAKEGAMI, Masaaki, 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. A multistage compression system (20) has a low-stage compressor (21), a high-stage compressor (23), refrigerant pipes (151 to 156 and 16), pressure reducing elements (26 and 15b), and an oil discharge pipe (32). The refrigerant pipes (151 to 156 and 16) introduce refrigerant compressed and discharged by the low-stage compressor (21) into a suction part of the high-stage compressor (23). The pressure reducing elements (26 and 15b) are disposed in a middle of the intermediate pressure refrigerant pipes (151 to 156). The oil discharge pipe (32) discharges oil in the low-stage compressor (21). The oil discharge pipe (32) connects the low-stage compressor (21) and the refrigerant pipe upstream of the pressure reducing elements (26 and 15b).