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Principle of heat pump dehumidifier


Although the categories of dehumidifier dryers are not as diverse as those of chiller machines, they are actually quite a lot. The related content is also introduced in the previous article. This article mainly introduces the principles of heat pump dehumidifier dryers, and The difference between traditional hot air drying and other related content.

Heat pump dehumidifier uses external air as a heat source. The principle is the same as that of air conditioner. 3.0km compressor power = 10kw electric heat. The dry air performs a closed cycle between the drying chamber and the heat pump dryer.It uses the heat pump refrigeration system to dehumidify and dehumidify the wet air from the drying chamber. When the wet air flows through the heat pump evaporator, the low-pressure refrigerant inside absorbs the air. The heat changes from liquid to gaseous, and most of the condensed water is discharged from the air due to dehumidification. The low-pressure refrigeration steam from the evaporator is boosted by the compressor and sent to the condenser. When the dehumidified dry cold air flows through the condenser, the internal high-pressure refrigerant emits heat due to condensation, and the external air is heated to hot air. After returning to drying, the high-pressure refrigerant liquid flowing out of the condenser is depressurized by the expansion valve and then flows into the evaporator to continue the next cycle. The motor is driven in the machine, and the waste heat is fully utilized, and a regenerator is added in the heat pump dehumidifier to reduce the humidity of the air entering the evaporator and the humidity of the air going into the condenser. The regenerative cycle makes the cold amount of the evaporator used for air cooling. Humidity is reduced, and the amount of coldness used in the dehumidification and dehumidification process is increased, which increases the optimal evaporation humidity and the optimal dehumidification capacity of the heat pump.The heat pump dehumidification and drying that increases the regenerative cycle is more than 31% more energy-efficient than ordinary heat pump drying. High thermal efficiency, material is stirred and dried, uniform heat transfer, low vaporization humidity, and the finished product comes out as small particles. This machine is suitable for super wet bulk materials, such as paste, wet powder, paste powder, paste material. It can reduce the moisture content from 79% to 5.1%. It is especially used for the drying of biological strains under normal humidity and low cost. The biological activity is hardly lost during the drying process. The difference between heat pump dehumidification drying and traditional hot air drying is that the air circulation is different, and the way of dehumidifying the air in the drying room is also different. When the heat pump is drying, the air performs a closed cycle between the drying chamber and the heat pump dryer. It uses the refrigeration system of the heat pump dryer to dehumidify and dehumidify the wet air from the drying chamber. When the wet air flows through the heat pump evaporator, the internal low pressure The heat absorbed by the refrigerant changes from liquid to gas, and most of the condensed water is discharged from the air due to dehumidification. The low-pressure refrigeration steam from the evaporator is boosted by the compressor and sent to the condenser. When the dehumidified dry and cold air flows through the condenser, the high-pressure refrigerant inside emits heat due to condensation, and the outside air is heated to hot air and returned to the drying chamber to continue drying the wood.

The high-pressure refrigeration expansion valve from the condenser is depressurized and flows into the evaporator to continue the next cycle. The heat pump dehumidification drying and regenerative cycle is to add a regenerator in the heat pump dehumidification dryer to reduce the humidity of the air entering the evaporator and increase the humidity of the air entering the condenser; the reheating cycle makes the evaporator's cooling capacity for air dehumidification and reduce ( Ineffective cooling process), and the cooling capacity for the cooling and dehumidification process increases, so that the optimal evaporation humidity and the optimal dehumidification capacity of the heat pump are increased; the heat pump dehumidification and drying by increasing the regenerative cycle saves energy by more than 28% compared with ordinary heat pump drying;

It is precisely because the heat pump dehumidifier has many advantages, so it is still very popular among customers in actual use.



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