Liquid nitrogen recharge device

The utility model discloses a liquid nitrogen recharging device which comprises a heat exchanger, a liquid nitrogen recharging device and a liquid nitrogen recharging device. Liquid nitrogen is stored in the storage tank, and the storage tank communicates with the input end of the reheating channel; the air cold inlet box is communicated with the input end of the cooling channel; and the rectifying tower is communicated with the output end of the cooling channel. According to the utility model, the liquid nitrogen is discharged differently, so that the problem that the whole product line is shut down when the purity of the liquid nitrogen cannot meet the requirement of product nitrogen is solved, meanwhile, qualified nitrogen can still be safely produced under the condition that the purity of the product nitrogen is seriously damaged, and the device has wide market application value. 本实用新型公开了一种液氮回灌装置，包括：换热器，其内部设置有冷却通道及复热通道；储罐，其内部存储有液氮，且所述储罐与所述复热通道输入端相连通；空气进冷箱，其与所述冷却通道的输入端相连通；以及精馏塔，其与所述冷却通道输出端相连通。根据本实用新型，其通过对液