Working principle and characteristics of air source heat pump dryer

Operational principle

The materials in the drying room are vaporized and evaporated by hot air, and the evaporated water vapor is discharged by the dehumidification system to achieve the purpose of drying the materials. After condensation and heat release, the refrigerant passes through the throttle valve and becomes a low-temperature and low-pressure liquid due to a sudden drop in pressure

Low, liquid refrigerant entering the evaporator continuously absorbs the low-level heat energy of the surrounding air and quickly evaporates into a gaseous state. The refrigerant that has absorbed a certain amount of energy flows back to the compressor and enters the next cycle. In this way, the refrigerant continuously circulates to transfer heat from the air

Transport to the drying room to heat the air temperature inside the room.

Characteristic

The heat pump absorbs low-temperature heat energy from the exhaust gas of the dryer, raises the temperature of the heat energy, and is used to heat the drying medium entering the dryer. At the same time, it cools and condenses the moisture in the exhaust gas of the dryer into liquid water for discharge. Compared with conventional dryer equipment, heat pump drying devices have

There are several outstanding advantages as follows:

① Energy saving. The energy consumption of high-temperature heat pump dryers can be reduced by more than 40% compared to ordinary dryers.

② Low temperature. Easy to achieve low-temperature drying at 0-100 ℃ under normal pressure, and can achieve high quality of dried products.

③ Safety. Convenient for safe drying of flammable and explosive products, as well as products that are prone to oxidation and deterioration, using inert drying media for fully enclosed circulation.

④ Environmental protection. When dry, it does not emit dust or odors to the external environment, and can recover the aroma components, solvents, etc. in the product.

Therefore, high-temperature heat pump dryers can provide a new solution for low-cost and high-quality drying of many materials, and have strong market competitiveness. Currently, energy conservation and environmental protection are increasingly valued, and users have higher requirements for material drying quality

In the current environment, the heat pump dryer, a new type of drying device that saves money, is energy-efficient, efficient, and has good drying quality, has obtained excellent development opportunities.