JPS5835686U

JPS5835686U - Oil recovery device for two-stage compression refrigerator

Info

Publication number: JPS5835686U
Application number: JP12920581U
Authority: JP
Inventors: 蓼沼　正道
Original assignee: 株式会社東洋製作所
Priority date: 1981-08-31
Filing date: 1981-08-31
Publication date: 1983-03-08

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図中、１・・・蒸発器、２・・・低圧側受液器、３・・
・冷媒戻り管、４・・・低段側圧縮機、６・・・低段側
油分離器、７・・・低段側油冷却器、８・・・低段側油
ポンプ、９・・・油戻し管、１０・・・分岐油戻し管、
１１・・・膨張弁、１２・・・電磁弁、１３・・・逆止
弁、１４・・・高段側圧縮機、１５・・・油面レベルス
イッチ、１６・・・低段冷媒ガス管、１７・・・中間冷
却器、１８・・・油戻し管、１９・・・膨張弁、２０・
・・高低段兼油回収器、２１・・・低段側冷媒戻り管、
２２・・・冷媒ガス管、２３・・・高段側油分離器、２
４・・・高段側油冷却器、２５・・・高段側油ポンプ、
２６・・・油戻し管、２７・・・冷媒ガス管、２８・・
・凝縮器、２９・・・高圧側受液器、３０・・・過冷却
管、３１・・・膨張弁、３２・・・冷媒ガス管、３３・
・・電磁弁、３４・・・液面レベルスイッチ、３５・・
・油戻し管、３６・・・膨張弁、３７・・・油戻し管、
３８・・・膨張弁、３９・・・均圧管、４０・・・冷媒
液管、４１・・・膨張弁。補正　昭５７．　１．２５図面の簡単な説明を次のように補正する。明細書中、第６頁１２行目「図面の簡単な説明」の次に
文章を加入する。「図は本考案に係る２段圧縮冷凍機の油回収装置の系統
図を示す。」In the figure, 1... evaporator, 2... low pressure side liquid receiver, 3...
・Refrigerant return pipe, 4...low stage compressor, 6...low stage oil separator, 7...low stage oil cooler, 8...low stage oil pump, 9...・Oil return pipe, 10...branch oil return pipe,
11... Expansion valve, 12... Solenoid valve, 13... Check valve, 14... High stage compressor, 15... Oil level switch, 16... Low stage refrigerant gas pipe , 17... Intercooler, 18... Oil return pipe, 19... Expansion valve, 20...
...High and low stage oil recovery device, 21...low stage side refrigerant return pipe,
22... Refrigerant gas pipe, 23... High-stage oil separator, 2
4...High stage side oil cooler, 25...High stage side oil pump,
26... Oil return pipe, 27... Refrigerant gas pipe, 28...
・Condenser, 29... High pressure side receiver, 30... Supercooling pipe, 31... Expansion valve, 32... Refrigerant gas pipe, 33...
...Solenoid valve, 34...Liquid level switch, 35...
・Oil return pipe, 36... expansion valve, 37... oil return pipe,
38... Expansion valve, 39... Pressure equalization pipe, 40... Refrigerant liquid pipe, 41... Expansion valve. Correction 1984. 1.25 The brief description of the drawings is amended as follows. In the specification, add a sentence next to "Brief explanation of the drawings" on page 6, line 12. ``The figure shows a system diagram of an oil recovery device for a two-stage compression refrigerator according to the present invention.''

Claims

[Scope of utility model registration request]

high, each with independent oil separator and oil recovery circuit;
Equipped with each low-stage compressor, the refrigerant discharged from the low-stage compressor is sent to the secondary side of the low-stage oil separator, intercooler, high-stage compressor, condenser, liquid receiver, and intercooler. , low pressure receiver, expansion valve,
In a two-stage compression refrigerator where oil is sucked into a low-pressure compressor via a cooler, one oil collector is provided to collect oil from the intercooler and the low-pressure liquid receiver, and this oil collector is used as an oil collector. The low-stage oil separator is connected to the low-stage compressor with a return pipe, and the low-stage oil separator is connected to the low-stage compressor with an oil return pipe, and is also connected to the high-stage compressor with a branch oil return pipe. □An oil recovery device for a two-stage compression refrigerating machine, characterized in that a return pipe is provided with a solenoid valve that opens when recovered oil in a low-stage oil separator exceeds a predetermined amount.