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The refrigerated air dryer adopts the principle of physical refrigeration. It cools and separates the moisture in the compressed air. Finally remove the water. At the same time, we get the pressure dew point of 2~10℃.

Refrigerated type air dryers are a type of compressed air treatment equipment that removes moisture and contaminants from compressed air systems. They work by reducing the temperature of the compressed air, which causes the moisture to condense and separate from the air stream. The dry air is then reheated and sent to the point of use.

The working principle of refrigerated type air dryers can be explained in the following steps:

Compression and Cooling: The compressed air from the compressor is cooled down to a temperature of around 38°C to 45°C in a heat exchanger using cooling water. This step is important because compressed air contains a large amount of moisture and other impurities, which can cause problems downstream in the system.

Pre-cooling: In the pre-cooling step, the compressed air is further cooled down to a temperature of around 3°C to 5°C using a refrigeration unit. The refrigeration unit works on the principle of the vapor compression cycle, where a refrigerant gas is compressed, cooled, and expanded to cool the compressed air.

Moisture Removal: The cooled compressed air enters the separator, where the moisture in the air stream condenses into liquid droplets. The liquid droplets are removed from the air stream by a drain trap, which automatically discharges the condensate from the system.

Post Cooling: The dry compressed air leaving the separator is reheated by the incoming warm air in a heat exchanger. The heat exchanger uses a counterflow design to maximize the heat transfer between the two air streams, which helps to reduce the temperature of the incoming air and increase the temperature of the outgoing air.

Final Filtration: Before the dry compressed air is sent to the point of use, it passes through a final filtration stage. This stage removes any remaining impurities and contaminants from the air stream, such as oil, dust, and other particulates.

The refrigeration unit in a refrigerated type air dryer plays a crucial role in the working principle of the system. The refrigeration unit consists of several components, including a compressor, condenser, evaporator, and expansion valve. The compressor compresses the refrigerant gas and sends it to the condenser, where it is cooled down by the cooling water. The cooled refrigerant gas then enters the evaporator, where it expands and cools down the compressed air. Finally, the refrigerant gas is sent back to the compressor through the expansion valve, where the cycle starts again.

In summary, the working principle of refrigerated type air dryers involves cooling and condensing the compressed air to remove moisture and other impurities. The refrigeration unit plays a crucial role in this process by cooling the compressed air using a vapor compression cycle. The dry air is then reheated and filtered before being sent to the point of use. Refrigerated type air dryers are commonly used in a wide range of industries, including food and beverage, pharmaceuticals, and electronics, to ensure that the compressed air used in their processes is clean and dry.