Our ultra-low temperature cascade refrigeration unit (cryogenic unit) ranges from -100 ℃ to -40 ℃ and is widely used in high-tech and R&D fields such as aerospace, research institutes, chemical and pharmaceutical industries, new materials, superconductivity, and environmental protection. Create huge economic benefits for users, and win the favor and recommendation of customers with its performance and perfect services.

Specific application areas of cryogenic units:
1. Pharmaceutical: synthesis, hydrolysis, esterification, etherification and other processes that require temperature control.
2. Chemical industry: distillation and purification, rubber crushing, low-temperature grinding.
3. Metal processing: low temperature assembly, low temperature sticking.
4. Food: Processing and storage of ultra-low temperature foods such as tuna.
5. Electronics: Environmental testing of components.
6. Aerospace: Heat sink experiment, component environment simulation test.
7. Environmental Protection: Waste gas condensation and recycling, net emissions.

Advantages of ultra-low temperature stacked explosion-proof refrigeration unit (stacked explosion-proof refrigeration unit) compared to liquid nitrogen:
1. The cost of using liquid nitrogen is 7-10 times that of using ultra-low temperature cascade refrigeration units; The vaporization heat of liquid nitrogen is 5.6KJ/mol=200kJ, the refrigeration power is 1kw. h, and 18KG=22 liters of liquid nitrogen are required.
2. Low temperature refrigeration units can control temperature, while liquid nitrogen temperature control is more difficult.
3. The transportation and storage of liquid nitrogen are very complicated, and once interrupted, production will stop.
4. The use of liquid nitrogen carries certain risks and requires a license for use.

Characteristics of stacked explosion-proof cryogenic unit:
When the stacked cryogenic unit is applied in industries such as pharmaceuticals, chemicals, and aerospace heat sink experiments, a refrigerant circulation system is usually required between the ultra-low temperature freezer and the user's load reaction tank. The main reasons are:
1. The load volume of general users is relatively large. If the load requires uniform temperature, it must be filled with refrigerant. However, at room temperature, a large amount of low-temperature refrigerant will turn into gas, and the volume and pressure of the gas will be huge, which the equipment itself will not be able to meet.
2. The load on the user's site is far away from the refrigeration room, and the load area is usually a clean, explosion-proof, and quiet area. The refrigerant circulation system can separate the cryogenic unit and the load area, making the entire system safer.
3. Usually, the cooling capacity is achieved by cooling the materials inside the load through the heat exchange coils. Once the heat exchange coils leak, it may contaminate the materials. The refrigerant system usually uses substances that are in contact with the material solvent, so even if there is a leak, it can avoid the possibility of contamination.
4. The refrigerant of the stacked explosion-proof deep refrigeration unit is also a carrier for storing cooling capacity. When the load changes greatly, it can be adjusted by the refrigerant. This is beneficial for temperature control and energy conservation. Generally speaking, the greater the load fluctuation, the more refrigerant is required.
5. The heat exchange efficiency is higher than that of liquid nitrogen. Liquid nitrogen uses latent heat of evaporation to release cooling energy. After absorbing heat, liquid nitrogen becomes gaseous, and a state of gas-liquid two-phase mixing occurs inside the coil, resulting in significant gas resistance and a sharp decrease in flow rate. This prevents liquid nitrogen from contacting the tube wall, greatly reducing heat transfer efficiency.

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