The Core Technology of Liquid Nitrogen Doser Injection Machine

Published on 24 October 2026 at 17:25

The liquid nitrogen filling injector machine utilizes the physical characteristics of rapid vaporization and expansion of low-temperature liquid nitrogen at -196℃ at room temperature to drip precise doses of liquid nitrogen into food and beverage packaging containers. The liquid nitrogen rapidly vaporizes and expands by about 700 times, instantly driving away the air inside the bottle, achieving the functions of deoxygenation, preservation, and pressurization to prevent collapse.

The key core technologies of Sichuan Aosituo Technology liquid nitrogen dripping injection machine include the following six aspects:

  1. Accurate metering injectiontechnology: Using speed synchronous injection and micro injection technology, the liquid nitrogen dosercan maintain consistent nitrogen injection volume and accuracy at different assembly line speeds.
  2. Nocontainersno filling technology: By using container sensors to detect whether a container/bottle has passed through, the filling will automatically stop when there is no container, avoiding waste of liquid nitrogen and greatly improving the utilization rate of liquid nitrogen.
  3. Anti freezing protectiontechnology: The nozzle adopts dry nitrogen positive pressure protection to prevent external air from entering and causing frost and ice blockage inside the nozzle, allowing the equipment to operate stably in low temperature environments.
  4. Vacuum insulation technology: All pipelines use vacuum liquid nitrogen insulation tubes to minimize liquid nitrogen consumption.
  5. Soft filling compatibility technology: suitable for hot filling, powder and granularfoodproducts, the filling mode can be switched between individual filling and continuous filling, and the speed is set by the user themselves.
  6. Intelligent controltechnology: PLC controllable programming, human-machine interface touch control, variable frequency speed regulation, simple operation and high degree of automation.

Technical Specifications of DO300 Sichuan Aosituo Liquid Nitrogen Doser Machine

  1. Raw material:SUS304
  2. Empty weight:15kg
  3. Size:950*177*603mm
  4. Power:100W 220V 50Hz
  5. LN2 pressure:<0.15Mpa
  6. Gas N2 pressure:0.5-0.65Mpa
  7. LN2 dosing head size:280*51mm
  8. Arm length:328mm
  9. Dosing nozzle size:1mm, 1.5mm, 2mm
  10. LN2 consumption:0.2L/h
  11. Dosing time:15-1000ms adjustable
  12. Dosing volume:0.01-14g/time adjustable
  13. Dosing accuracy:±5%
  14. Spot spray speed:0-300bottles/min
  15. Max. continuous spray speed:2000bottles/min

Please contact us for more product details.

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