Small mobile nitrogen generators are specially developed for the seafood fresh-keeping cold chain industry, solving the problems of short fresh-keeping period, easy oxidation and deterioration, and high cold chain loss rate of seafood products in transportation and storage. Different from industrial fixed nitrogen generation equipment, this type of generator features miniaturization, portability, low energy consumption and high safety, and is perfectly adapted to mobile scenarios such as seafood refrigerated trucks, cold storage turnover boxes and temporary fresh-keeping warehouses. Its working principle is mainly based on membrane separation technology, which separates nitrogen from air quickly and efficiently, produces food-grade high-purity nitrogen, and forms an oxygen-isolated nitrogen-filled fresh-keeping environment to inhibit the respiration and oxidation of seafood, prolong the fresh-keeping cycle.
In terms of structural design, the seafood fresh-keeping mobile nitrogen generator adopts an integrated compact layout, integrating air filtration, compression, separation, nitrogen storage and control systems into a small unit, with light weight and small footprint, which is convenient for mobile handling and vehicle-mounted installation. The equipment is equipped with a silent and low-vibration compressor, which avoids vibration damage to seafood products during mobile operation and reduces noise pollution in the cold chain environment. The shell is made of anti-corrosion and waterproof food-grade materials, adapting to the high-humidity and low-temperature working environment of the cold chain, preventing equipment rust and performance attenuation, and ensuring stable operation in the temperature range of -10℃ to 40℃.
In terms of performance parameters, the nitrogen purity of the equipment is stably controlled at 95%–99%, which meets the food fresh-keeping industry standard, and the nitrogen output is adjustable to adapt to different volumes of seafood packaging and cold storage spaces. The equipment supports automatic constant pressure operation, automatically starts and stops according to the set nitrogen concentration, effectively reducing energy consumption, and the power consumption is far lower than that of traditional liquid nitrogen fresh-keeping equipment. In actual application, nitrogen-filled fresh-keeping with this equipment can reduce the oxygen content in the seafood storage environment to below 5%, inhibit the growth of bacteria and microorganisms, keep the color, taste and nutritional components of seafood unchanged, and extend the fresh-keeping time of fresh seafood by 2–3 times compared with traditional refrigeration.
In terms of application advantages and maintenance, the mobile nitrogen generator has low operation cost and no need for liquid nitrogen procurement and storage, avoiding the safety risks of liquid nitrogen low-temperature leakage. The equipment is equipped with an intelligent fault self-detection system, which can alarm in real time for abnormal pressure, insufficient purity and other problems, with simple daily maintenance. It is widely used in the whole cold chain links of seafood fishing, transportation, wholesale and retail, and has become an essential energy-saving and efficient fresh-keeping equipment for the modern seafood circulation industry.
