JPH0216966U

JPH0216966U -

Info

Publication number: JPH0216966U
Application number: JP9431588U
Authority: JP
Priority date: 1988-07-14
Filing date: 1988-07-14
Publication date: 1990-02-02

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例による冷凍装置の
除霜制御回路を示すブロツク図、第２図は第１図
に示す冷凍装置の動作を示すフロー図、第３図は
この考案の一実施例を説明するための庫内温度と
蓄熱剤温度と圧縮機運転時間とバイパス電磁弁開
閉状態を示すタイミング図、第４図は従来の冷凍
装置の冷凍サイクルの構成図である。図中、１……圧縮機、２……凝縮器、３……絞
り装置、４……蒸発器、８ａ……バイパス配管、
９……蓄熱槽、９ａ……蓄熱剤、１０……高圧側
熱交換路、１１……低圧側熱交換路、１２……三
方電磁弁、１４，１５……第１、第２の電磁弁、
１６……バイパス電磁弁、１７……圧力調整弁、
２１……圧縮機運転時間積算回路。なお、図中同
一符号は同一、又は相当部分を示す。 Fig. 1 is a block diagram showing a defrosting control circuit of a refrigeration system according to an embodiment of this invention, Fig. 2 is a flow diagram showing the operation of the refrigeration system shown in Fig. 1, and Fig. 3 is an implementation of this invention. FIG. 4 is a timing chart showing the internal temperature of the refrigerator, the heat storage agent temperature, the compressor operating time, and the opening/closing state of the bypass solenoid valve for explaining an example. FIG. 4 is a configuration diagram of a refrigeration cycle of a conventional refrigeration system. In the figure, 1...compressor, 2...condenser, 3...throttle device, 4...evaporator, 8a...bypass piping,
9... Heat storage tank, 9a... Heat storage agent, 10... High pressure side heat exchange path, 11... Low pressure side heat exchange path, 12... Three-way solenoid valve, 14, 15... First, second solenoid valve ,
16...Bypass solenoid valve, 17...Pressure regulating valve,
21... Compressor operating time integration circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

A high-pressure side heat exchange path whose inlet side is connected to the outlet side of a compressor that compresses refrigerant gas, a low-pressure side heat exchange path whose inlet side is connected to the outlet side of an evaporator for evaporating refrigerant liquid, and a heat storage agent. and a heat storage tank in which the high-pressure and low-pressure side heat exchange paths are disposed within the heat storage agent, and a bypass motor-operated valve provided in a bypass path that bypasses the low-pressure side heat exchange path, and a refrigerating cycle mode. and a refrigeration system that selects either the bypass path or the low-pressure side heat exchange path by opening and closing the bypass motor-operated valve according to the hot gas defrost mode; opening/closing means for temporarily closing the bypass electric valve when the accumulated operating time of the compressor exceeds a predetermined time; and at least resetting the operating time of the compressor when the bypass electric valve is opened by the opening/closing means. A refrigeration device comprising a reset means.