December 22, 2024

The relationship between several systems of high and low temperature test chambers

The relationship between several systems of high and low temperature test chambers

The system action of the high and low temperature test chamber is based on three interrelated systems: the refrigerant circulation system, the air circulation system, and the electrical automatic control system. Below, our company will briefly describe these three systems and hope to help users.

Refrigerant circulation system of high and low temperature test chamber: The liquid refrigeration in the evaporator absorbs the heat of the air and begins to evaporate. Finally, a certain temperature difference between the refrigerant and the air is formed. The liquid refrigerant also completely evaporates into a gaseous state, and then It is absorbed and compressed by the compressor. The gaseous refrigerant absorbs heat through the condenser and condenses into a liquid. Then through the expansion valve or the capillary throttling, the low-temperature and low-pressure refrigerant enters into the evaporator to complete the refrigerant circulation process.

Air circulation system of high and low temperature test chamber: The air blower inhales the air from the air inlet. After the air passes through the evaporator, humidifier, electric heater, it is sent to the space required by the user through the air outlet, and the air and air in the space are sent out. Return to the air outlet after mixing.

The electrical automatic control system of the high and low temperature test box includes a power supply part and an automatic control part. The power supply part supplies power to the compressor, the fan, and the humidifier through the contactor. Automatic control part is divided into temperature and humidity control and fault protection part: temperature and humidity control is through the temperature and humidity controller. Comparing the temperature and humidity of the return air with the temperature and humidity set by the user, the compressor, humidifier, electric heater and other components are automatically operated to realize its automatic control failure. The protection control is through pressure protection, delayer, relay , Overload protection and other combinations achieve control of compressor, fan, humidifier and other components for fault protection.

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