Principle of Medium-Sized Liquid Nitrogen Generators for Laboratory Research Institutions

In industrial production, liquid nitrogen generators primarily obtain liquid nitrogen through the fractional distillation of compressed liquid air. It can be used as a deep cryogenic refrigerant. Due to its chemical inertness, it can directly contact biological tissues, instantly freezing them without damaging biological activity. The liquid nitrogen generator introduced by Lecheng Gas utilizes a single-compressor-driven deep cryogenic mixed refrigerant throttle refrigerator with pre-cooling to meet the demand for nitrogen liquefaction (-180°C). The deep cryogenic mixed refrigerant throttle refrigerator is based on a regenerative multi-component mixed refrigerant throttle refrigeration cycle. From ambient temperature to the target refrigeration temperature, it optimally combines pure components with high, medium, and low boiling points to form a multi-component mixed refrigerant, making it an efficient refrigerant for achieving temperatures in the range of -40°C to -196°C.

Application Areas of Medium-Sized Liquid Nitrogen Generators for Laboratory Research Institutions:

(1) Rapid freezing and transportation of food, or production of ice products;

(2) Research in low-temperature physics, sensor calibration, and specimen preservation;

(3) Fishing vessels, hotels, and food processing plants;

(4) Providing the temperature required for high-temperature superconductors to exhibit superconductivity, such as yttrium barium copper oxide;

(5) Can be used as a refrigerant to rapidly freeze biological tissues, preventing tissue damage;

(6) Used in the industrial production of nitrogen fertilizers;

(7) Used for cryotherapy in hospitals and beauty salons, as well as vaccine preservation;

(8) Used for embryo freezing and cryopreservation in farms.