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The mutual restriction of the three major systems of the constant temperature and humidity chamber ensures the stable operation of the equipment

Date: May 27,2021 Views: 32

1. Air circulation system of constant temperature and humidity chamber: the centrifugal fan is responsible for sucking in the air from the return air outlet, and the air passes through the steamer, humidifier, and electric heater, and after cooling or heating, dehumidification or humidification, it is sent to the user experiment space through the air outlet Inside, the sent air mixes with the air in the space and then returns to the return air vent, so that the circulating operation reaches the experimental temperature and is stable.

 

2. constant temperature and humidity chamber electrical automatic control system: this block contains some power supplies and some that are actively controlled. Some of the power supplies pass through the contactor, and some are actively controlled to supply power to compressors, fans, electric heaters, humidifiers, etc. Some of them are temperature and humidity. Some control and fault protection. The temperature and humidity control is through the temperature and humidity controller, the temperature and humidity of the return air are compared with the temperature and humidity set in the experiment, and the compressor, humidifier, electric heating and other components are actively operated to cool down, heat up, and dehumidify to achieve constant temperature and humidity. Active control.

 

3. Compressor refrigeration cycle system of constant constant temperature and humidity chamber: The liquid refrigerant in the evaporator absorbs the heat of the air (the air is cooled and dehumidified) and starts to evaporate, resulting in a certain temperature difference between the refrigerant and the air, liquid refrigeration The refrigerant completely evaporates into a gaseous state, and is sucked and compressed by the compressor (pressure and temperature addition). The gaseous refrigerant passes through the condenser (air-cooled/water-cooled) to absorb heat and condenses into a liquid. After throttling by an expansion valve (or capillary tube), it becomes a low-temperature and low-pressure refrigerant and enters the evaporator, completing the refrigerant cycle process.




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