Dongguan Jitian Machinery Co., Ltd.
Q Q： 281732381
Address：No. 65 Of Chiling Section,GuanTai Road,HouJie Town,DongGuan City
Definition of Dryer and Its Working Principle
A mechanical device that uses the heat energy to reduce the moisture content of the material for drying the object. The dryer evaporates the moisture in the material (generally refers to moisture or other volatile liquid components) by heating to obtain a solid material with a defined moisture content. The purpose of drying is for the purpose of material use or further processing.
Such as wood in the production of wood mold, wood drying can prevent the deformation of the product, ceramic billet in the calcination before drying can prevent the finished product cracking. Another dry material is also easy to transport and storage, such as the harvest of food to a certain moisture content below, to prevent mildew. As the natural drying can not meet the needs of the development of production, a variety of mechanized dryer more and more widely applied.
The following are the same as the "
The amount of water vapor in the compressed air is determined by the temperature of the compressed air: reducing the temperature of the compressed air to reduce the water vapor content in the compressed air while maintaining the compressed air pressure substantially constant, and the excess water vapor will condense Into a liquid. Freeze dryer is the use of this principle using refrigeration technology to dry compressed air. So the cold and dry machine has a refrigeration system. Analysis of the principle of freeze dryer
Freeze dryer refrigeration system is compressed refrigeration, by the refrigeration compressor, condenser, evaporator, expansion valve and other four basic components. They are connected in turn by piping to form a closed system, the refrigerant in the system constantly circulating, the state changes and the compressed air and cooling medium for heat exchange.
The refrigerant compressor sucks the low pressure (low temperature) refrigerant in the evaporator into the compressor cylinder, the refrigerant vapor is compressed, the pressure and the temperature rise simultaneously; the high pressure high temperature refrigerant vapor is pressed into the condenser, in the condenser, The higher the temperature of the refrigerant vapor and the temperature is relatively low cooling water or air for heat exchange, the refrigerant heat is taken away by water or air condensed down, the refrigerant vapor into a liquid. This part of the liquid is then transported to the expansion valve, through the expansion valve into a low temperature and low pressure liquid and into the evaporator; in the evaporator low temperature, low pressure refrigerant liquid to absorb the heat of compressed air and vaporization (commonly known as "evaporation") And the compressed air is cooled to condense a large amount of liquid water; the refrigerant vapor in the evaporator is sucked by the compressor so that the refrigerant is compressed, condensed, throttled and evaporated in the system so that the refrigerant Completed a loop. The following are the same as the "
In the refrigeration system of the freeze dryer, the evaporator is a device for conveying the cooling capacity in which the refrigerant absorbs the heat of the compressed air to achieve the purpose of dehydration and drying. The compressor is the heart, plays the role of inhalation, compression, and delivery of refrigerant vapor. The condenser is a device that discharges heat and transfers the heat absorbed in the evaporator along with the heat of the compressor input power to the cooling medium, such as water or air. The expansion valve / throttle valve acts as a throttle to the refrigerant, and controls and regulates the amount of the refrigerant liquid flowing into the evaporator, and divides the system into two parts: the high pressure side and the low pressure side.