How long should the liquid nitrogen machine be filled with liquid nitrogen?

The self-pressurized liquid nitrogen machine is a stainless steel cryogenic container. The working principle is that when there is a small amount of liquid nitrogen in the container, we need to pressurize it to vaporize the liquid nitrogen. When the booster valve reaches the critical pressure, open the drain valve, and the liquid nitrogen can be discharged normally. It is easy to use, but how long is it suitable for the self-pressurized liquid nitrogen tank to be filled with liquid nitrogen?

The self-increasing liquid nitrogen machine can not only output liquid nitrogen, but also input liquid nitrogen, which has double effects. The liquid container in this way is mainly embodied in the liquid inlet and outlet valve. When filling the container with liquid, it is necessary to open the drain valve, connect the infusion metal hose to the inlet/outlet valve, open the inlet/outlet valve, and add liquid medium from the inlet/outlet valve. After filling, close the inlet/outlet valve. Another method is to plug the liquid inlet from the liquid port. After filling the container, please open the exhaust valve first, unscrew the liquid port plug, and then add liquid medium from the liquid port. . To reduce the loss of liquid nitrogen, please refill the container when there is still a small amount of liquid in the container. Fill the container 48 hours after the liquid is used up. The function of self-pressurized liquid nitrogen tank is more convenient, and the infusion and drainage can be carried out in time.

If a conventional storage type of liquid nitrogen machine is used, liquid nitrogen machines of different capacities have different liquid nitrogen volatility. For the same liquid nitrogen container, the larger the diameter, the stronger the liquid nitrogen volatility. The larger the volume of the same liquid nitrogen container, the longer the storage time of liquid nitrogen. However, if you purchase a new liquid nitrogen container, pay attention to the heat balance phenomenon each time you fill the container with liquid nitrogen. First fill the container with a small amount of liquid nitrogen for pre-cooling, and then slowly fill it to prevent the liquid nitrogen tank from freezing.