Refrigeration system and working principle of constant temperature and humidity test chamber

The constant temperature and humidity test chamber is used to test the performance of materials in various environments and to test the heat resistance, cold resistance, dry resistance and humidity resistance of various materials. It is suitable for testing the quality of electronic, electrical, communication, instrument, vehicle, plastic products, metal, food, chemical, building materials, medical, aerospace and other products.

Constant temperature and humidity test chamber refrigeration system

1. The low temperature refrigeration adopts a fully enclosed compressor unit. The evaporative condenser acts both as a high temperature stage evaporator and a low temperature stage condenser.

2. In order to ensure the safe operation of the system, protection systems such as high and low voltage control, overpressure and overload should be set up in the system. At the same time, in order to monitor the operation of the system, high and low pressure gauges are required to monitor the operation of the system at the high and low voltage ends.

3. The cooling capacity is adjusted by the split method.

Working principle:

The constant temperature and humidity test chamber consists of two parts: temperature regulation (heating, cooling) and humidification. Through the rotating fan installed on the top of the chamber, the air is discharged into the chamber to realize gas circulation and balance the temperature and humidity in the chamber. The data collected by the built-in temperature and humidity sensor in the chamber is transmitted to the temperature and humidity controller (micro Information processor) to edit and process, and issue temperature and humidity control instructions, which are completed by the air heating unit, the condenser tube and the heating and evaporation unit in the water tank.

The temperature adjustment of the constant temperature and humidity chamber is to collect data through the built-in temperature sensor in the chamber, adjust the temperature controller (micro information processor), and connect the air heating unit to increase the temperature or adjust the refrigeration solenoid valve to reduce the temperature inside the chamber, so as to reduce the temperature inside the chamber, to the temperature required for control. The humidity adjustment of the constant temperature and humidity chamber is to collect data through the built-in humidity sensor in the body, adjust the humidity controller (micro information processor), connect the heating element of the water tank, and evaporate the water in the water tank to increase the humidity in the chamber or adjust the refrigeration. Solenoid valve to achieve dehumidification to achieve the required humidity control.

The constant temperature and humidity chamber is equipped with multiple protection measures; the temperature system is equipped with an over-temperature protector under the condition that the maximum safe allowable temperature can be set, and the air heating element can be automatically powered off when the rotating fan stops; The humidification system can stop power supply when the water level of the humidification tank decreases; the refrigeration system can also stop working when the temperature of the chamber rises (over 40℃) or the humidity increases.