Comparison between traditional drying method and air source heat pump food dehydrator
Comparison between traditional drying method and air source heat pump food dehydrator
Dried beancurd should be dried rather than exposed to the sun, because the dried beancurd is easy to mildew in storage. At first, people used firewood and hot gas to dry, which was poor in sanitation, easy to control the fire, low yield and labor-intensive. Later, it was heated and dried with the steam of the boiler, which consumed too much energy, and the boiler had to be guarded by a specially assigned person. Sometimes the steam supply is insufficient, and the drying effect of Yuba is not good. For example, it is easy to sour, fragile, not environmentally friendly, poor appearance, etc.
In recent years, with the improvement of heat pump production technology and drying technology, the use of air energy heat pump dryer can obtain the required high-temperature heat without burning coal, wood, boiler or steam, and only a small amount of electric energy can drive the compressor to obtain the required heat, which is safe and hygienic, no pollution, no waste gas emission, ultra-low operation electricity cost, and fully automatic operation without personnel on duty. It is a new generation of traditional Yuba drying equipment. In the drying process, the intelligent system accurately controls the temperature and humidity of the drying time, and carries out accurate drying in strict accordance with the drying process, making a medium and high-grade dry goods.
Core principle of heat pump food dehydrator
Using the inverse Carnot principle, the air energy heat pump dryer machine absorbs the free heat in the air by inputting a small amount of electric energy and transfers it to the drying warehouse (inputting 1 degree of electric energy to produce 4 degrees of electric heat energy), so as to improve the temperature of the drying room and cooperate with the corresponding dehumidification and dehumidification equipment to dry the materials. The air dryer is powered by a compressor. Condenser (heater). Throttling device (electronic expansion valve), evaporator (heat absorber), compressor and other devices constitute a refrigerant circulation system. The refrigerant circulates in the system under the action of the compressor. It completes the pressure rise and temperature rise process in the compressor (the temperature is as high as 120 c). After entering the condenser, it releases high-temperature heat to heat the air in the drying room. At the same time, it is cooled and transformed into liquid. When it runs to the evaporator, the liquid evaporates rapidly, absorbs heat and transforms into gas again, and the temperature drops to - 20 30C, At this time, the air around the evaporator will continuously transfer heat to the refrigerant. The continuous circulation of refrigerant can transport the heat in the air to the drying room, and the air in the drying room can achieve the purpose of drying materials.
Technical characteristics of heat pump food dehydrator
1. Energy saving: the energy efficiency ratio of heat pump determines its energy-saving characteristics. Compared with ordinary gas and electric drying, the energy consumption cost can be saved by 60-70 percent . The energy-saving effect of heat pump dryer is more energy-saving than traditional dryers such as oil, coal, gas and electric heating.
2. Stability: another characteristic of Yuba dryer is stability. Compared with gas and electricity, its safety and stability can be improved by 4-5 times.
3. Good drying quality: heat pump food dehydratordrying is an ideal drying method, which is close to natural drying. The evaporation rate of surface water is close to the migration rate of internal water to the surface, so the color and quality of dry products are very good.
4. Drying parameters are easy to control: in the heat pump drying process, temperature, humidity and circulating air volume can be accurately and effectively controlled.
