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What are the characteristics of special dehumidifiers?


Special dehumidifiers provide a method and equipment for heating, cooling, and dehumidifying indoor spaces under varying indoor and outdoor temperatures to meet indoor temperature and humidity requirements. They can improve the performance of dehumidification and temperature control systems, expand their applicability, and have the following advantages: ① Automatic defrosting: The indoor heat exchanger of the special dehumidifier acts as an evaporator. When the surface temperature of the evaporator is below 0°C and the relative humidity of the air entering the evaporator is high, moisture in the air may frost on the outer surface of the evaporator. Once the frost reaches a certain thickness, it increases the pressure loss on the air side, reduces air flow, and deteriorates heat exchange efficiency, necessitating defrosting.

The special dehumidifier provides a method and equipment for heating, cooling, and dehumidifying indoor spaces under different indoor and outdoor temperatures to meet indoor temperature and humidity requirements. It can improve the performance of the dehumidification and temperature control system, expand its applicable range, and has the following advantages:

① Automatic Defrosting:Special DehumidifierThe indoor heat exchanger acts as the evaporator. When the surface temperature of the evaporator is below0℃, if the relative humidity of the air entering the evaporator is high, moisture in the air may frost on the outer surface of the evaporator. When the frost reaches a certain thickness, it increases the pressure loss on the air side, reduces air flow, and decreases heat exchange efficiency, necessitating defrosting.

Special Dehumidifier

② Heating Mode:Special DehumidifierWhen the indoor temperature is very low and the heat load is relatively large, although the relative humidity is high, the moisture content is low, making it difficult to expel moisture from the air. However, after heating the air, under the condition of unchanged moisture content, the relative humidity of the air drops rapidly. Therefore, temperature control of the indoor environment can be achieved through the system's heating operation.

③ Heating and Dehumidifying Mode: When both indoor humidity and moisture load are high, but the indoor temperature is low and the heat load is relatively small,Special Dehumidifierthe system operates in heating and dehumidifying mode. At this time, the four-way valve is not energized, and the system operates in cooling mode. The outdoor heat exchanger branch is shut off by an electromagnetic valve, the second indoor heat exchanger acts as a condenser, and the indoor heat exchanger acts as an evaporator.

④ Special Dehumidifier Cooling and Dehumidifying Mode: When both indoor temperature and humidity are high, and the indoor cooling load is relatively large,Special Dehumidifierthe system operates in cooling and dehumidifying mode. At this time, the four-way valve is not energized, and the system operates in cooling mode. The branch of the second indoor heat exchanger is shut off by an electromagnetic valve, the outdoor heat exchanger acts as a condenser, and the indoor heat exchanger acts as an evaporator. The indoor air is only cooled and dehumidified by the indoor heat exchanger, becoming low-temperature and low-humidity air that returns indoors.

⑤ Special Dehumidifier Temperature Control and Dehumidifying Mode: When both indoor humidity and moisture load are high, and the indoor cooling load is relatively small,Special Dehumidifierthe system operates in temperature control and dehumidifying mode. At this time, the four-way valve is not energized, and the system still operates in cooling mode. The outdoor heat exchanger and the second indoor heat exchanger act as two parallel condensers, while the indoor heat exchanger acts as an evaporator.

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