JPS6422971U

JPS6422971U -

Info

Publication number: JPS6422971U
Application number: JP11601587U
Authority: JP
Priority date: 1987-07-28
Filing date: 1987-07-28
Publication date: 1989-02-07

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例による冷凍装置の
冷凍サイクル構成図、第２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３図はこの考案の一実施例による冷凍装置
の制御動作を説明するための庫内温度と蓄熱剤温
度・バイパスの電磁弁の開閉状態を示す関係図、
第４図は第１、第２図に示す冷凍装置の動作を示
すフローチヤート図、第５図は従来の冷凍装置の
冷凍サイクル構成図である。これらの図において、１は圧縮機、２は凝縮器
、３は絞り装置、４は蒸発器、１０は高圧側熱交
換路、１１は低圧側熱交換路、９ａは蓄熱剤、９
は蓄熱槽、２３は除霜開始信号発生回路、２２は
庫内温度検出器、２１は蓄熱剤温度検出器、３０
は選択回路、３１はバイパス配管、３２はバイパ
ス電磁弁である。なお、各図中同一符号は同一、
または相当部分を示す。 Fig. 1 is a refrigeration cycle configuration diagram of a refrigeration system according to an embodiment of this invention, Fig. 2 is a block diagram showing a defrosting control circuit of a refrigeration system according to an embodiment of this invention, and Fig. 3 is an embodiment of this invention. A relationship diagram showing the internal temperature, the heat storage agent temperature, and the opening/closing state of the bypass solenoid valve to explain the control operation of the refrigeration system according to the embodiment,
FIG. 4 is a flowchart showing the operation of the refrigeration system shown in FIGS. 1 and 2, and FIG. 5 is a refrigeration cycle configuration diagram of the conventional refrigeration system. In these figures, 1 is a compressor, 2 is a condenser, 3 is a throttle device, 4 is an evaporator, 10 is a high pressure side heat exchange path, 11 is a low pressure side heat exchange path, 9a is a heat storage agent, 9
2 is a heat storage tank, 23 is a defrosting start signal generation circuit, 22 is an internal temperature detector, 21 is a heat storage agent temperature detector, 30
31 is a selection circuit, 31 is a bypass pipe, and 32 is a bypass solenoid valve. In addition, the same symbols in each figure are the same,
or a significant portion.

Claims

[Scope of utility model registration request]

In a refrigeration system equipped with a compressor, a condenser, a throttle device, an evaporator, heat exchange paths provided on the high-pressure side and low-pressure side, and a heat storage tank containing a heat storage agent, the output of the defrosting start signal generation circuit defrosting is performed by bypassing the expansion device and supplying the high-temperature refrigerant discharged from the compressor to the evaporator;
and hot gas defrost means for supplying the liquid refrigerant sent out from the evaporator to the low-pressure side heat exchange path to cool the heat storage agent, and stopping the operation of the compressor by the output of a defrosting start signal generation circuit. an off-cycle defrost means for defrosting, an internal temperature detector for detecting the internal temperature of the refrigerator or freezer, a heat storage agent temperature detector for detecting the temperature of the heat storage agent, and a temperature sensor for detecting the internal temperature of the refrigerator or freezer; When the temperature of the heat storage agent is equal to or higher than the predetermined temperature, off-cycle defrost is selected by the output of the defrost start signal generation circuit, and when the internal temperature is below the predetermined value, the hot gas defrost is selected. and a bypass piping which bypasses the high pressure side heat exchanger and has a bypass solenoid valve in the middle, and controls the opening and closing of the bypass solenoid valve by the output signal of the heat storage agent temperature detector. Characteristic refrigeration equipment.