In the heat pump drying equipment, the drying medium is closed in the cycle, and there is no pollution caused by the discharge of the material dust, volatile substances and odors with the drying exhaust gas to the environment; the waste heat in the exhaust of the drying chamber is directly recovered by the heat pump to heat the cold and dry air, no The thermal pollution of the unit to the environment. Food dryers are suitable for a wide range of materials. Suitable materials for drying are mainly a large class of materials that can withstand temperatures between 20 and 70°C during the drying process, or even though the materials can withstand higher temperatures, heat pumps are used to dry more energy-saving or safe materials.
The low temperature air can be closed and cycle dried, and the material drying quality is good. After controlling the working conditions of the equipment, the temperature of the hot dry air in the drying room is between 20 and 70 ℃, which can meet the high-quality drying requirements of most heat-sensitive materials; the closing cycle of the drying medium can avoid the exchange with the outside air May contaminate the material with impurities, which is particularly important for food, medicine or biological products
Temperature: Drying of food is generally divided into two categories: dry and wet. Dry food generally uses high temperature and fast drying; wet food uses low temperature and slow drying.
Humidity: Food generally has a large water content, so controlling the amount of moisture is an important factor in determining the drying quality of the food dryer; the moisture of other meat foods exists in fats and fats, and it is difficult to dehydrate and control the speed of dehydration It is very important.
Circulating wind: Food drying generally requires a large amount of air and wind speed to remove the moisture from the surface as soon as possible to avoid moisture staying on the surface of the material for a long time and affecting the drying speed.
Food dryers are suitable for a wide range of materials. The materials suitable for drying are mainly a large class of materials that can withstand temperatures between 20 and 80°C during the drying process, or although the materials can withstand higher temperatures, heat pumps are used to dry materials that are more energy-efficient or safe. Materials such as wood, grain, seeds, edible fungi, medicinal materials, seafood, biologically active products, tea, and paper have been studied and applied.