JPS6448552U

JPS6448552U -

Info

Publication number: JPS6448552U
Application number: JP14330987U
Authority: JP
Priority date: 1987-09-17
Filing date: 1987-09-17
Publication date: 1989-03-24

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す冷凍装置の
構成図、第２図は第１図に示す冷凍装置の回転数
制御装置の制御特性図、第３図は従来の冷凍装置
の構成図、第４図は第３図に示す冷凍装置の回転
数制御装置の制御特性図である。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は送風機、１１は回転数制御装
置、１２は温度検出センサー、２０は短絡回路、
２１は圧力スイツチ、２２はタイマーである。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 block diagram of a refrigeration system showing an embodiment of this invention, Fig. 2 is a control characteristic diagram of the rotation speed control device of the refrigeration system shown in Fig. 1, and Fig. 3 is a block diagram of a conventional refrigeration system. , FIG. 4 is a control characteristic diagram of the rotation speed control device of the refrigeration system shown in FIG. 3. In these figures, 1 is a compressor, 2 is a condenser, 3 is a throttle device,
4 is an evaporator, 10 is a blower, 11 is a rotation speed control device, 12 is a temperature detection sensor, 20 is a short circuit,
21 is a pressure switch, and 22 is a timer. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A refrigerant circuit consisting of a compressor, a condenser that condenses and liquefies the gas refrigerant supplied from the compressor, a throttle device, and an evaporator, a blower that supplies air to be heat exchanged to the condenser, and the condenser. a temperature detection sensor that detects the condensation temperature of the refrigerant supplied to the container;
A rotation speed control device that controls the rotation speed of the blower according to the temperature detection signal output from the temperature detection sensor, a pressure switch that detects the refrigerant pressure on the high pressure side of the refrigerant circuit, and a pressure switch that is connected in series with each other. It has a switch contact and a timer contact that closes only for a preset time period, and has a short circuit connected in parallel with the temperature detection sensor,
During the time period set in the timer, when the high pressure side refrigerant pressure of the refrigerant circuit is equal to or higher than a predetermined pressure value, the blower is driven by the power supply voltage and the high pressure side refrigerant pressure during this time period is less than the predetermined value. The refrigeration system is characterized in that the number of revolutions of the blower is controlled in accordance with the output signal of the temperature detection sensor during the time period and outside the time period set by the timer.