The principle of heat pump dryer Heat pump dryer is the use of anti-Carnot principle, the absorption of air heat and transferred to the room, to achieve the temperature rise of the drying room, with the appropriate equipment to achieve the material drying. Heat pump dryer from the compressor - heat exchanger (internal) - throttle - heat sink (external) - compressor and other devices form a circulation system. The refrigerant circulates through the system under the action of the compressor. It is in the compressor to complete the gaseous heating process (temperature up to 100 ℃), it enters the machine to release high-temperature heat to heat and dry the room air, while being cooled and transformed into a liquid state, when it runs to the machine After the liquid rapidly absorbs heat and evaporates again into the gas, while the temperature dropped to minus 20 ℃ - 30 ℃, then the heat around the air will be an endless stream of heat transfer to the refrigerant. Refrigerant constantly circulating to achieve the heat in the air to the drying room to heat the room air temperature. Second, heat pump drying oven performance characteristics: 1. Easy installation: easy installation, demolition, covers an area of ​​?? less, can be installed indoors and outdoors; 2. Energy efficient: just consume a small amount of electricity, you can absorb a lot of air Heat, power consumption is only 1 / 3-1 / 4 heater; with coal, oil, gas drying equipment, compared to about 75% savings in operating costs. 1 kWh equals 4 kWh. 3. Environmental pollution: no any combustion and emissions, is a sustainable development of environmentally friendly products. 4. Safe and reliable operation: the whole system is running without the danger of combustibility, explosion, poisoning and short circuit which may exist in the traditional dryer (fuel, gas or electric heating). It is an absolutely safe and reliable closed drying system. 5. Long service life and low maintenance cost: It is developed on the basis of the traditional air-conditioning technology. The technology is mature, the performance is stable, reliable, and the service life is long. The operation is safe and reliable, and it is free from manual operation and intelligent control. 6. Comfort and convenience, automation, high degree of intelligence: the use of automatic temperature control device, 24-hour continuous drying operation. 7. Wide range of applications, free from the impact of climate: It can be widely applied to the heating and drying operations of food, chemical, pharmaceutical, paper, leather, wood, agricultural and sideline products processing industries. Third, the application of heat pump drying and drying technology With the continuous expansion of the scale of industrial production, the traditional drying efficiency and high cost of drying methods are increasingly unable to meet existing needs. Heat pump as a new, energy-saving new technology. To a large extent, the problems of slow drying efficiency and high drying cost are solved. Under the background of slow drying efficiency and high drying cost, if the drying temperature is below 100 degrees, the choice of heat pump drying will be a preferred direction for the enterprise. At present, heat pump drying has gradually been applied in many industries. For example: Tobacco drying tobacco industry, the food industry starch, rice dry, paint the surface of the material drying, drying temperature of 100 degrees below the material drying. Heat pump drying is moving to improve the drying temperature, the development of new heat pump drying system, and automatic control of heat pump technology and other aspects of development, heat pump drying will reduce energy consumption and improve product quality will be a perfect unification of both technologies will bring significant drying industry Technological revolution.
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