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1. WO2020067197 - MULTISTAGE COMPRESSION SYSTEM

Publication Number WO/2020/067197
Publication Date 02.04.2020
International Application No. PCT/JP2019/037672
International Filing Date 25.09.2019
IPC
F25B 1/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
1Compression machines, plant or systems with non-reversible cycle
F04B 39/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
39Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/-F04B37/225
F04C 23/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
23Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
F04C 29/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
29Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups F04C18/-F04C28/193
02Lubrication; Lubricant separation 
F25B 1/10 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
1Compression machines, plant or systems with non-reversible cycle
10with multi-stage compression
CPC
F04B 39/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
39Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
F04C 23/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
23Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
F04C 29/02
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
29Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
02Lubrication
F25B 1/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
1Compression machines, plant, or systems with non-reversible cycle
F25B 1/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
1Compression machines, plant, or systems with non-reversible cycle
10with multi-stage compression
Applicants
  • ダイキン工業株式会社 DAIKIN INDUSTRIES, LTD. [JP]/[JP]
Inventors
  • 大西 洋輔 OHNISHI, Yousuke
  • 足立 将彬 ADACHI, Masaaki
  • 梶原 幹央 KAJIWARA, Mikio
  • 富岡 直人 TOMIOKA, Naoto
  • 西出 洋平 NISHIDE, Yohei
  • 岡本 大輔 OKAMOTO, Daisuke
Agents
  • 新樹グローバル・アイピー特許業務法人 SHINJYU GLOBAL IP
Priority Data
2018-18507328.09.2018JP
2018-23378913.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) MULTISTAGE COMPRESSION SYSTEM
(FR) SYSTÈME DE COMPRESSION À ÉTAGES MULTIPLES
(JA) 多段圧縮システム
Abstract
(EN)
In a refrigeration apparatus using a plurality of multistage compressors, there is a need to keep an appropriate amount of refrigerator oil in each of the compressors. A multistage compression system (20) has a low-stage compressor (21), a high-stage compressor (23), refrigerant pipes (151-156, 16), pressure reducing elements (26, 15b), and an oil drain pipe (32). The refrigerant pipes (151-156, 16) introduce, into a suction part of the high-stage compressor (23), a refrigerant that is compressed at the low-stage compressor (21) and that is discharged therefrom. The pressure reducing elements (26, 15b) are disposed at intermediate locations in the intermediate-pressure refrigerant pipes (151-156, 16). The oil drain pipe (32) drains oil from the low-stage compressor (21). The oil drain pipe (32) connects the low-stage compressor (21) and the refrigerant pipe that is disposed at a downstream side of the pressure reducing elements (26, 15b).
(FR)
Dans un appareil de réfrigération utilisant une pluralité de compresseurs à étages multiples, il existe un besoin de maintenir une quantité appropriée d'huile de réfrigérateur dans chacun des compresseurs. À cet effet, l'invention concerne un système de compression à étages multiples (20) qui comprend un compresseur à étage bas (21), un compresseur à étage élevé (23), des tuyaux de fluide frigorigène (151-156, 16), des éléments de réduction de pression (26, 15b), et un tuyau de vidange d'huile (32). Les tuyaux de fluide frigorigène (151-156, 16) introduisent, dans une partie d'aspiration du compresseur à étage élevé (23), un fluide frigorigène qui est comprimé au niveau du compresseur à étage bas (21) et qui est refoulé à partir de celui-ci. Les éléments de réduction de pression (26, 15b) sont disposés à des emplacements intermédiaires dans les tuyaux de fluide frigorigène à pression intermédiaire (151-156, 16). Le tuyau de vidange d'huile (32) évacue l'huile du compresseur à étage bas (21). Le tuyau de vidange d'huile (32) relie le compresseur à étage bas (21) et le tuyau de fluide frigorigène qui est disposé au niveau d'un côté aval des éléments de réduction de pression (26, 15b).
(JA)
複数台の多段圧縮機を用いた冷凍装置においては、それぞれの圧縮機において、冷凍機油を適量に保つ必要性があった。多段圧縮システム(20)は、低段圧縮機(21)と、高段圧縮機(23)と、冷媒配管(151~156、16)と、圧力低下要素(26、15b)と、油排出管(32)とを有する。冷媒配管(151~156、16)は、低段圧縮機(21)で圧縮され、吐出された冷媒を、高段圧縮機(23)の吸入部分に導入する。圧力低下要素(26、15b)は、中間圧冷媒配管(151~156、16)の途中に配置されている。油排出管(32)は、低段圧縮機(21)の油を排出する。油排出管(32)は、低段圧縮機(21)と、圧力低下要素(26、15b)よりも下流側の冷媒配管と、を接続する。
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