JPS6083861U - Cooling system - Google Patents

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

【図面の簡単な説明】[Brief explanation of drawings]

第１図乃至第６図は従来例、第７図乃至第１０図は本考
案の一実施例を示し、第１図は冷却装置の概略冷媒回路
図、第２図乃至第６図は第１図に示した要部Ａの拡大縦
断面図、第７図乃至第１０図は液冷媒バイパスパイプ及
び逆止弁を備えた冷却装置の要部縦断面図である。 １・・・冷却装置、２・・・圧縮機、３・・・凝縮器、
６・・・膨張弁、７・・・蒸発器、８・・・アキュムレ
ータ、９・・・吸入圧力調整弁、１４・・・第１パイプ
、１５・・・第２パイプ、２０−・・液冷媒バイパスパ
イプ、２１・・・逆止弁。1 to 6 show a conventional example, FIGS. 7 to 10 show an embodiment of the present invention, FIG. 1 is a schematic refrigerant circuit diagram of a cooling device, and FIGS. FIGS. 7 to 10 are enlarged longitudinal sectional views of the main part A shown in the figure, and FIGS. 7 to 10 are longitudinal sectional views of the main parts of a cooling device equipped with a liquid refrigerant bypass pipe and a check valve. 1... Cooling device, 2... Compressor, 3... Condenser,
6... Expansion valve, 7... Evaporator, 8... Accumulator, 9... Suction pressure adjustment valve, 14... First pipe, 15... Second pipe, 20-... Liquid Refrigerant bypass pipe, 21... check valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 圧縮機、凝縮器、蒸発器及びアキュムレータ等を環状に
配管接続し、前記蒸発器と前記アキュムレータとの間に
は第１パイプが配管され、前記アキュムレータと前記圧
縮機との間には第２パイプが配管された冷却装置におい
て、前記圧縮機の出口側パイプと前記蒸発器の入口側パ
イプとの間には前記蒸発器の冷却運転時には閉じ除霜運
転時には開く電磁弁を備えたホットガス除霜用配管が設
けられ、前記第２パイプは前記アキュムレータの下部か
ら内部を上方へ延び適所にオイル戻し用小孔が形成され
ると共に、その上端が前記アキュムレータ内に開口し、
該第２パイプの適所には前記圧縮機の過負荷運転を防止
する吸入圧力調整弁が設けられると共に、該吸入圧力調
整弁と前記アキュムレータの下部との間の前記第２パイ
プには該アキュムレータより低い低部が形成され、前記
第１パイプには前記第２パイプの低部より低い低部が形
成され、前記第２パイプの底部と前記第１パイプの低部
との間には前記アキュムレータをバイパスした液冷媒バ
イパスパイプが配管され、該液冷媒バイパスパイプには
前記第２パイプから前記第１パイプへの冷媒の流れを許
し、前記第１パイプから前記第２パイプへの冷媒の流れ
を阻止する逆止弁が設けられたことを特徴とする冷却装
置。A compressor, a condenser, an evaporator, an accumulator, etc. are connected in an annular manner, a first pipe is provided between the evaporator and the accumulator, and a second pipe is provided between the accumulator and the compressor. In the cooling system, a hot gas defrosting valve is provided between the outlet side pipe of the compressor and the inlet side pipe of the evaporator, and a solenoid valve that closes during cooling operation of the evaporator and opens during defrosting operation. The second pipe extends upward from the bottom of the accumulator inside the accumulator, and has a small hole for oil return formed in a suitable position, and its upper end opens into the accumulator,
A suction pressure regulating valve for preventing overload operation of the compressor is provided at a proper location of the second pipe, and a suction pressure regulating valve is provided between the suction pressure regulating valve and the lower part of the accumulator from the accumulator. A low bottom portion is formed in the first pipe, the bottom portion being lower than the bottom portion of the second pipe, and the accumulator is disposed between the bottom portion of the second pipe and the bottom portion of the first pipe. A bypassed liquid refrigerant bypass pipe is installed, and the liquid refrigerant bypass pipe allows refrigerant to flow from the second pipe to the first pipe and prevents the refrigerant from flowing from the first pipe to the second pipe. A cooling device characterized by being provided with a check valve.