The operation of the industrial constant temperature and humidity test chamber system is through three interconnected systems: a refrigerant circulation system, an air circulation system, and an electrical automatic control system.
First, the 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. Finally, a certain temperature difference between the refrigerant and the air is formed. The liquid refrigerant also completely evaporates into a gaseous state, which is then inhaled by the compressor. And compression (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 tube), the refrigerant turns into a low-temperature and low-pressure refrigerant and enters the evaporator to complete the refrigerant circulation process.
Second, the air circulation system:
The fan is responsible for sucking air from the 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. The air sent is mixed with the air in the space. Back to the air outlet.
Third, electrical automatic control system:
Including power supply and automatic control. The power supply part supplies power to the compressor, fan, power injector, humidifier, etc. through the contactor. The automatic control part is divided into temperature and humidity control and fault protection parts: the temperature and humidity control is through the temperature and humidity controller, the temperature and humidity of the return air is compared with the temperature and humidity set by the user, and the compressor is automatically operated (cooling , Dehumidifier, humidifier, electric heating (heating) and other components, to achieve automatic control of temperature and humidity failure protection control is achieved through pressure protection, delay, relays, overload protection and other combinations, the compressor, fan, humidification Components such as devices for fault protection control.
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