How long is it appropriate to fill the liquid nitrogen machine with liquid nitrogen?

The self pressurized liquid nitrogen machine is a stainless steel cryogenic vessel. Its working principle is that when there is a small amount of liquid nitrogen in the container, we need to pressurize 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 convenient to use, but how long is it appropriate to fill the self pressurized liquid nitrogen tank with liquid nitrogen?

The self increasing liquid nitrogen machine can not only output liquid nitrogen, but also input liquid nitrogen, with double effects. The liquid container in this way is mainly embodied in the inlet and outlet valves of the liquid. When filling the container, 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 the liquid medium from the inlet / outlet valve. After filling, close the inlet / outlet valves. The other method is to plug the liquid port 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. After filling the liquid, plug it into the liquid port. To reduce the loss of liquid nitrogen, please replenish 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 can conduct infusion and drainage in time.

If the conventional storage type liquid nitrogen machine is used, the volatility of liquid nitrogen is different for different capacity liquid nitrogen machines. The larger the diameter of the same liquid nitrogen container, the stronger the volatility of liquid nitrogen. The larger the volume of the same liquid nitrogen container, the longer the storage time of liquid nitrogen. However, if you buy a new liquid nitrogen container, you should pay attention to the heat balance phenomenon every time you fill the container with liquid nitrogen. First fill a small amount of liquid nitrogen into the container for precooling, and then slowly fill it to prevent the liquid nitrogen tank from freezing.