Which is better, liquid nitrogen pump or solid nitrogen pump?

According to today's headline official information, liquid nitrogen pump: saves space, and its nozzle and accelerator are relatively small. The operation is simple and the filling process of the liquid nitrogen pump is convenient. Efficient gas purification can be achieved, and liquid nitrogen can quickly absorb impurities in the air and maintain a high purification effect.

Solid nitrogen pump: no need to replenish nitrogen frequently, and the use cost is low. It can well avoid the waste of coolant caused by the damage of nozzle and accelerator. It is more stable in low-pressure environment. Both of them have their own advantages and disadvantages, and the choice of liquid nitrogen pump or solid nitrogen pump should be evaluated and selected according to the specific scene requirements.