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1. WO2020067194 - MULTISTAGE COMPRESSION SYSTEM

Publication Number WO/2020/067194
Publication Date 02.04.2020
International Application No. PCT/JP2019/037669
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
  • 岡本 大輔 OKAMOTO, Daisuke
  • 富岡 直人 TOMIOKA, Naoto
  • 梶原 幹央 KAJIWARA, Mikio
  • 西出 洋平 NISHIDE, Yohei
  • 大西 洋輔 OHNISHI, Yousuke
  • 足立 将彬 ADACHI, Masaaki
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
2018-22158527.11.2018JP
2018-23378713.12.2018JP
2018-23379013.12.2018JP
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 device using a plurality of multistage compressors, it has been necessary to keep refrigerating machine oil at an appropriate amount in each of the compressors. There has been a problem that when oil discharged from a compressor on a high stage is returned to the refrigerant suction side of a compressor on a low stage, heat loss and pressure loss occur and the efficiency of the system is decreased. A multistage compression system (20) has a low-stage compressor (21), a high-stage compressor (23), and an oil returning tube (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 returning tube (31) is connected to a space lower than the motor (40) inside the container (30).
(FR)
Dans un dispositif de réfrigération utilisant une pluralité de compresseurs à étages multiples, il a été nécessaire de maintenir l'huile de la machine de réfrigération à une quantité appropriée dans chacun des compresseurs. Il existe un problème selon lequel, lorsque l'huile refoulée d'un compresseur sur un étage élevé est renvoyée au côté aspiration de fluide frigorigène d'un compresseur sur un étage bas, une perte de chaleur et une perte de pression se produisent et le rendement du système est réduit. 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), et un tube de retour d'huile (31). Le compresseur à étage bas (21) comporte une partie de compression (50), un moteur (40) et un récipient (30). Le récipient (30) loge la partie de compression (50) et le moteur (40). Le tube de retour d'huile (31) est relié à un espace inférieur au moteur (40) à l'intérieur du récipient (30).
(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。高段側の圧縮機で吐出された油を、低段側の圧縮機の冷媒吸入側に戻した場合に、熱ロス、圧力ロスが発生し、システムの効率が低下する課題があった。多段圧縮システム(20)は、低段圧縮機(21)と、高段圧縮機(23)と、油戻し管(31)とを有する。低段圧縮機(21)は、圧縮部(50)と、モータ(40)と、容器(30)とを有している。容器(30)は、圧縮部(50)とモータ(40)とを収容する。油戻し管(31)は、容器(30)内部のモータ(40)よりも下の空間に接続されている。
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