The laboratory liquid nitrogen machine is characterized by its simple process flow, ambient temperature production, high automation, convenient start-stop operation, minimal wear parts, easy maintenance, and low production costs. It is primarily used in educational laboratory settings, cryopreservation of animal sperm, thermal expansion and contraction in bearing production, and preservation of freshness in beverage cans.

The liquid nitrogen machine utilizes a deep cold mixed refrigerant throttling refrigeration system driven by a single compressor with pre-cooling to achieve nitrogen liquefaction (-180°C). Based on a reheating multi-component mixed refrigerant throttling refrigeration cycle, it matches the relay cooling of various boiling point components effectively from ambient temperature to the target refrigeration temperature, making it highly efficient for refrigeration in the temperature range of -40°C to -196°C. The product advantages include the use of mature commercial compressors, heat exchangers, and other equipment available in the market, high liquefaction efficiency, high reliability, maintenance-free operation, and long service life.

Main Applications of the Liquid Nitrogen Machine:

Low-temperature Ball Milling Technology Continuous input of liquid nitrogen into a ball mill equipped with insulation allows rapid absorption of heat generated by the high-speed rotating ball mill jar, maintaining a consistent low-temperature environment. This setup is used for mixing, fine grinding, research and development of new products, and small-scale production of high-tech materials. The product is compact, versatile, efficient, and operates with low noise, widely applied in pharmaceuticals, chemicals, environmental protection, light industry, building materials, metallurgy, ceramics, and mining sectors.

Manufacturing and Testing of Electronic Components Liquid nitrogen serves as a rapid and effective method for shielding and testing electronic components and circuit boards.

Superconducting Technology Widely utilized across various fields, liquid nitrogen replaces liquid helium as a superconducting refrigerant to enable large-scale development and application of superconducting technology.

Green Machining Technology Low-temperature cutting involves directing low-temperature fluids such as liquid nitrogen, liquid carbon dioxide, or cold air into the cutting zone of the processing system, creating localized low or ultra-low temperature conditions. This process utilizes the low-temperature brittleness of workpieces under low-temperature conditions to enhance machining performance, tool life, and surface quality of workpieces. Liquid nitrogen cooling in cutting primarily applies to difficult-to-process materials such as titanium alloys, high manganese steel, and quenched steel.