JPS62111800U

JPS62111800U -

Info

Publication number: JPS62111800U
Application number: JP48486U
Authority: JP
Priority date: 1986-01-07
Filing date: 1986-01-07
Publication date: 1987-07-16

Description

[Brief explanation of the drawing]

第１図乃至第３図は本案の実施例を示し、第１
図は冷凍装置の冷媒回路図、第２図は制御器の論
理回路図、第３図は過電流検出信号と周波数可変
装置の入力電流との関係を示す説明図、第４図及
び第５図は従来例を示し、第４図は冷凍装置の冷
媒回路図、第５図は制御器の論理回路図である。１…冷凍サイクル、２…圧縮機、４…膨張弁、
５…蒸発器、６…周波数可変装置、９…電流検出
器、１０…制御器、１３…タイマー。 Figures 1 to 3 show examples of the present invention;
The figure is a refrigerant circuit diagram of the refrigeration system, Figure 2 is a logic circuit diagram of the controller, Figure 3 is an explanatory diagram showing the relationship between the overcurrent detection signal and the input current of the frequency variable device, and Figures 4 and 5. 4 shows a conventional example, FIG. 4 is a refrigerant circuit diagram of a refrigeration system, and FIG. 5 is a logic circuit diagram of a controller. 1... Refrigeration cycle, 2... Compressor, 4... Expansion valve,
5... Evaporator, 6... Frequency variable device, 9... Current detector, 10... Controller, 13... Timer.

Claims

[Scope of utility model registration request]

A refrigeration cycle configured by pipe-connecting a compressor, a condenser, a pressure reducing device, an evaporator, etc., a frequency variable device that changes the frequency of electric power supplied to the electric motor that drives the compressor, and an input current to the frequency variable device. Or in a refrigeration system equipped with a current detector that detects the output current and generates a signal, and a controller that controls the frequency variable device to lower the frequency when the signal from the current detector exceeds a set value. . The refrigeration system, wherein the controller has a built-in timer function that causes the frequency variable device to maintain a lowered frequency for a predetermined time when the signal from the current detector exceeds a set value.