JPS58172780U

JPS58172780U - air conditioner

Info

Publication number: JPS58172780U
Application number: JP6927982U
Authority: JP
Inventors: 深見　晃; 待井　義弘; 学北本
Original assignee: 株式会社東芝
Priority date: 1982-05-12
Filing date: 1982-05-12
Publication date: 1983-11-18

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]

第１図は従来における水冷ヒートポンプ式冷凍サイクル
の構成図、第２図、第３図および第４図は従来の高圧保
護回路の一例をそれぞれ示す構成図、第５図はこの考案
の一実施例を示す冷凍サイクルの構成図、第６図は同実
施例における高圧保護回路を示す構成図、第７図ａ、　
　ｂは同実施例の変形例の要部をそれぞれ示す構成図で
ある。１・・・圧縮機、３・・・水熱交換器、１１・・・電磁
接触器、２１・・・電気回路、２２ａ・・・リレー接点
、３０・・・熱交換器、３１・・・オイル戻し管、４１
・・・保護抵抗、４２・・・高圧スイッチ。Figure 1 is a block diagram of a conventional water-cooled heat pump type refrigeration cycle, Figures 2, 3, and 4 are block diagrams showing examples of conventional high-voltage protection circuits, and Figure 5 is an example of an embodiment of this invention. Fig. 6 is a block diagram showing the high voltage protection circuit in the same embodiment, Fig. 7a,
b is a configuration diagram showing main parts of a modification of the same embodiment. DESCRIPTION OF SYMBOLS 1... Compressor, 3... Water heat exchanger, 11... Magnetic contactor, 21... Electric circuit, 22a... Relay contact, 30... Heat exchanger, 31... Oil return pipe, 41
...Protection resistor, 42...High voltage switch.

Claims

[Scope of utility model registration request]

A refrigeration cycle, an electromagnetic contactor that controls the opening and closing of an energizing path for a drive motor of a compressor of the refrigeration cycle, and a high-pressure switch that is a bidirectional switching contact that operates when the high-pressure side pressure of the refrigeration cycle exceeds a certain value. and an electric circuit including a relay contact that is turned on in response to an operation command and turned off when the high voltage switch is activated based on the normally closed side contact output of the high voltage switch, and the electromagnetic contactor is connected to a protective resistor and the electric circuit. An air conditioner characterized in that it is connected to a power source via a series circuit with a relay contact, and a normally open contact of the high voltage switch is connected in parallel to the electromagnetic contactor.゛