The operation of the industrial constant temperature and humidity test chamber system is through three interconnected systems: refrigerant circulation system, air circulation system, electrical automatic control system.
1. Refrigerant circulation system:
The liquid refrigerant in the evaporator absorbs the heat of the air (the air is cooled and dehumidified) and begins to evaporate. Eventually, a certain temperature difference is formed between the refrigerant and the air, and the liquid refrigerant is completely evaporated into a gaseous state, and then sucked into the compressor And compressed (pressure and temperature increase), the gaseous refrigerant absorbs heat through the condenser (air-cooled / water-cooled) and condenses into a liquid. After throttling through the expansion valve (or capillary), it turns into a low-temperature and low-pressure refrigerant and enters the evaporator to complete the refrigerant circulation process.
2. Air circulation system:
The fan is responsible for sucking air from the return air inlet. The air passes through the evaporator (cooling, dehumidification), humidifier, electric heater (heating) and is sent to the user's space through the air outlet. Back to the air outlet.
Three, electrical automatic control system:
Including power supply part and automatic control part. The power supply part supplies power to the compressor, fan, electric heater, humidifier, etc. through the contactor. The automatic control part is divided into temperature and humidity control and fault protection parts: 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, and automatically running the compressor (cooling , Dehumidification), humidifier, electric heating (heating) and other components to achieve automatic control of constant temperature and humidity. Fault protection control is achieved through a combination of pressure protection, delay, relay, overload protection, etc., for compressors, fans, humidification And other components for fault protection control.
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