Cold press, that is, cold and dry compressor. The amount of water vapor in the compressed air is determined by the temperature of the compressed air: In the case of keeping the pressure of the compressed air substantially unchanged, reducing the temperature of the compressed air can reduce the water vapor content in the compressed air, and the excess water vapor will condense Into a liquid. The cold dryer (freeze dryer) uses this principle to dry compressed air using refrigeration technology.
The cold press is divided into a screw cold press and a hydraulic cold press. The lead screw cold press has a turbine, which requires long-term maintenance and is vulnerable. Hydraulic cold press. It is not easy to leak oil and does not require frequent maintenance, and the work efficiency is high.
The cold dryer (freeze dryer) has a refrigeration system. In the refrigeration system of the cold and dry machine, the evaporator is a device that transmits cold energy, and the refrigerant absorbs the heat of the compressed air therein to achieve the purpose of dehydration and drying. The compressor is the heart and plays the role of sucking, compressing, and transmitting refrigerant vapor. Condenser is a device that releases heat, and transfers the heat absorbed in the evaporator to the cooling medium (such as water or air) along with the heat converted by the input power of the compressor. The expansion valve / throttle valve restricts and reduces the pressure of the refrigerant, controls and adjusts the amount of the refrigerant liquid flowing into the evaporator, and divides the system into two parts: a high-pressure side and a low-pressure side. In addition to the above-mentioned components, the SSS chiller also includes components such as energy regulating valves, high and low pressure protectors, automatic blowdown valves, and control systems.