JPS604868U

JPS604868U - Heat pump air conditioner

Info

Publication number: JPS604868U
Application number: JP9615283U
Authority: JP
Inventors: 荒巻　辰男
Original assignee: 株式会社東芝
Priority date: 1983-06-22
Filing date: 1983-06-22
Publication date: 1985-01-14

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図は従来のヒートポンプ式空気調和装置を示す構成
図、第２図はその除霜時の四方弁の動作状況を示す線図
、第３図ないし第５図はこの考案の一実施例を示し、第
３図はヒートポンプ式空気調和装置を示す構成図、第４
図はその除霜時の四方弁、電動式膨張弁、その他機器の
動作状況を示す線図、第５図は同じく冷凍サイクルの圧
力変化を従来のものと対比して示した線図である。１・・・圧縮機、２・・・四方弁、３・・・室内側熱交
換器、４・・・電動式膨張弁、５・・・室外側熱交換器
、６・・・冷媒路、７・・・冷凍サイクル、８・・・制
御回路（制御手段）。］□− −運転状ｗＪ７弁 −１」１ＬFig. 1 is a configuration diagram showing a conventional heat pump type air conditioner, Fig. 2 is a diagram showing the operating status of a four-way valve during defrosting, and Figs. 3 to 5 show an embodiment of this invention. Fig. 3 is a configuration diagram showing a heat pump type air conditioner;
The figure is a diagram showing the operating status of the four-way valve, electric expansion valve, and other equipment during defrosting, and FIG. 5 is a diagram showing the pressure changes in the refrigeration cycle in comparison with the conventional one. DESCRIPTION OF SYMBOLS 1... Compressor, 2... Four-way valve, 3... Indoor heat exchanger, 4... Electric expansion valve, 5... Outdoor heat exchanger, 6... Refrigerant path, 7... Refrigeration cycle, 8... Control circuit (control means). ]□---Operating status wJ7 valve-1" 1L

Claims

[Scope of utility model registration request]

(1) A refrigeration cycle consisting of a compressor, a four-way valve, an indoor heat exchanger, an electric expansion valve, and an outdoor heat exchanger connected in sequence through a refrigerant path, and a refrigeration cycle at the start of defrosting operation and at the end of defrosting operation. control means for fully opening the electric expansion valve for a predetermined period of time, and controlling the circular valve to be switched to a defrosting operation side and a return side after the electric expansion valve is fully opened. Heat pump type air conditioner.

(2) The electric expansion valve is a heat pump type % type according to claim 1 of the utility model registration claim, characterized in that the electric expansion valve does not involve a pressure reducing action when fully opened.

(3) The heat pump according to claim 1, wherein the fully open operation time of the electric expansion valve is the time during which the condensed liquid refrigerant flows to the evaporation side through the electric expansion valve. formula% formula%