Working principle of dryer
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- Time of issue:2022-12-21
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(Summary description)For example, the drying of wood before making wood mold and wood ware can prevent the deformation of products, and the drying of ceramic billet before calcination can prevent the cracking of finished products. In addition, after drying materials are also easy to transport and storage, such as the harvest of food dry to a wet content below, in order to prevent mildew. As natural drying can not meet the needs of production development, various mechanical drying machines are more and more widely used.
The amount of water vapor in the compressed air is determined by the temperature of the compressed air: Lowering the temperature of the compressed air, while keeping the pressure of the compressed air basically constant, reduces the amount of water vapor in the compressed air, and the excess water vapor condenses into a liquid. Freeze dryer is to use this principle to use refrigeration technology to dry compressed air. Therefore, the cold drying machine has refrigeration system. The refrigeration system of freeze dryer belongs to compression refrigeration, composed of refrigeration compressor, condenser, evaporator, expansion valve and other four basic components. They are successively connected by pipes to form a closed system, in which the refrigerant constantly circulates, changes state and exchanges heat with compressed air and cooling medium. Compressed air dryer and adsorption dryer and dissolution dryer.
The refrigeration compressor inhales the low pressure (low temperature) refrigerant in the evaporator into the compressor cylinder. The refrigerant steam is compressed, and the pressure and temperature rise at the same time. The high pressure and high temperature refrigerant steam is pressed to the condenser. In the condenser, the refrigerant steam with a higher temperature exchanges heat with the cooling water or air with a lower temperature. The heat of the refrigerant is taken away by the water or air and condensed, and the refrigerant steam becomes a liquid. This part of the liquid is transported to the expansion valve, through the expansion valve to choke into low temperature and low pressure liquid and into the evaporator; In the evaporator, the low temperature and low pressure refrigerant liquid absorbs the heat of the compressed air and vaporizes (commonly known as "evaporation"), and the compressed air is cooled and condenses a large amount of liquid water; The refrigerant steam in the evaporator is sucked away by the compressor, so that the refrigerant is compressed, condensed, throttled and evaporated in the system, thus completing a cycle.
In the refrigeration system of freeze dryer, the evaporator is the equipment for conveying cold volume, in which the refrigerant absorbs the heat of compressed air to achieve the purpose of dehydration and drying. Compressor is the heart, playing the role of suction, compression, transport refrigerant steam. Condenser is a device that releases heat. It transfers the heat absorbed in the evaporator together with the heat converted by the input power of the compressor to the cooling medium (such as water or air) to take away. The expansion valve/throttle valve plays a role in throttling the refrigerant and reducing the pressure. At the same time, it controls and regulates the amount of refrigerant liquid flowing into the evaporator, and divides the system into two parts: the high pressure side and the low pressure side.
Working principle of dryer
(Summary description)For example, the drying of wood before making wood mold and wood ware can prevent the deformation of products, and the drying of ceramic billet before calcination can prevent the cracking of finished products. In addition, after drying materials are also easy to transport and storage, such as the harvest of food dry to a wet content below, in order to prevent mildew. As natural drying can not meet the needs of production development, various mechanical drying machines are more and more widely used.
The amount of water vapor in the compressed air is determined by the temperature of the compressed air: Lowering the temperature of the compressed air, while keeping the pressure of the compressed air basically constant, reduces the amount of water vapor in the compressed air, and the excess water vapor condenses into a liquid. Freeze dryer is to use this principle to use refrigeration technology to dry compressed air. Therefore, the cold drying machine has refrigeration system. The refrigeration system of freeze dryer belongs to compression refrigeration, composed of refrigeration compressor, condenser, evaporator, expansion valve and other four basic components. They are successively connected by pipes to form a closed system, in which the refrigerant constantly circulates, changes state and exchanges heat with compressed air and cooling medium. Compressed air dryer and adsorption dryer and dissolution dryer.
The refrigeration compressor inhales the low pressure (low temperature) refrigerant in the evaporator into the compressor cylinder. The refrigerant steam is compressed, and the pressure and temperature rise at the same time. The high pressure and high temperature refrigerant steam is pressed to the condenser. In the condenser, the refrigerant steam with a higher temperature exchanges heat with the cooling water or air with a lower temperature. The heat of the refrigerant is taken away by the water or air and condensed, and the refrigerant steam becomes a liquid. This part of the liquid is transported to the expansion valve, through the expansion valve to choke into low temperature and low pressure liquid and into the evaporator; In the evaporator, the low temperature and low pressure refrigerant liquid absorbs the heat of the compressed air and vaporizes (commonly known as "evaporation"), and the compressed air is cooled and condenses a large amount of liquid water; The refrigerant steam in the evaporator is sucked away by the compressor, so that the refrigerant is compressed, condensed, throttled and evaporated in the system, thus completing a cycle.
In the refrigeration system of freeze dryer, the evaporator is the equipment for conveying cold volume, in which the refrigerant absorbs the heat of compressed air to achieve the purpose of dehydration and drying. Compressor is the heart, playing the role of suction, compression, transport refrigerant steam. Condenser is a device that releases heat. It transfers the heat absorbed in the evaporator together with the heat converted by the input power of the compressor to the cooling medium (such as water or air) to take away. The expansion valve/throttle valve plays a role in throttling the refrigerant and reducing the pressure. At the same time, it controls and regulates the amount of refrigerant liquid flowing into the evaporator, and divides the system into two parts: the high pressure side and the low pressure side.
- Categories:News
- Author:
- Origin:
- Time of issue:2022-12-21
- Views:0
For example, the drying of wood before making wood mold and wood ware can prevent the deformation of products, and the drying of ceramic billet before calcination can prevent the cracking of finished products. In addition, after drying materials are also easy to transport and storage, such as the harvest of food dry to a wet content below, in order to prevent mildew. As natural drying can not meet the needs of production development, various mechanical drying machines are more and more widely used.
The amount of water vapor in the compressed air is determined by the temperature of the compressed air: Lowering the temperature of the compressed air, while keeping the pressure of the compressed air basically constant, reduces the amount of water vapor in the compressed air, and the excess water vapor condenses into a liquid. Freeze dryer is to use this principle to use refrigeration technology to dry compressed air. Therefore, the cold drying machine has refrigeration system. The refrigeration system of freeze dryer belongs to compression refrigeration, composed of refrigeration compressor, condenser, evaporator, expansion valve and other four basic components. They are successively connected by pipes to form a closed system, in which the refrigerant constantly circulates, changes state and exchanges heat with compressed air and cooling medium. Compressed air dryer and adsorption dryer and dissolution dryer.
The refrigeration compressor inhales the low pressure (low temperature) refrigerant in the evaporator into the compressor cylinder. The refrigerant steam is compressed, and the pressure and temperature rise at the same time. The high pressure and high temperature refrigerant steam is pressed to the condenser. In the condenser, the refrigerant steam with a higher temperature exchanges heat with the cooling water or air with a lower temperature. The heat of the refrigerant is taken away by the water or air and condensed, and the refrigerant steam becomes a liquid. This part of the liquid is transported to the expansion valve, through the expansion valve to choke into low temperature and low pressure liquid and into the evaporator; In the evaporator, the low temperature and low pressure refrigerant liquid absorbs the heat of the compressed air and vaporizes (commonly known as "evaporation"), and the compressed air is cooled and condenses a large amount of liquid water; The refrigerant steam in the evaporator is sucked away by the compressor, so that the refrigerant is compressed, condensed, throttled and evaporated in the system, thus completing a cycle.
In the refrigeration system of freeze dryer, the evaporator is the equipment for conveying cold volume, in which the refrigerant absorbs the heat of compressed air to achieve the purpose of dehydration and drying. Compressor is the heart, playing the role of suction, compression, transport refrigerant steam. Condenser is a device that releases heat. It transfers the heat absorbed in the evaporator together with the heat converted by the input power of the compressor to the cooling medium (such as water or air) to take away. The expansion valve/throttle valve plays a role in throttling the refrigerant and reducing the pressure. At the same time, it controls and regulates the amount of refrigerant liquid flowing into the evaporator, and divides the system into two parts: the high pressure side and the low pressure side.
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