Manufacturing method of alternately pre-cooling liquid nitrogen quick-freezing machine

The utility model discloses a liquid nitrogen quick-freezer with alternate pre-cooling, comprising a cooling chamber A and a cooling chamber B that are fixedly connected, a connecting pipe is arranged at the connection of the cooling chamber A and the cooling chamber B, and the cooling chamber A and the cooling chamber B are inside Both are screwed with a circulating fan and a temperature measuring device. The cooling chamber A and the cooling chamber B are respectively provided with a liquid nitrogen device. The liquid nitrogen device includes a liquid nitrogen pipe and a vaporization device connected to the liquid nitrogen pipe. The vaporization device includes a vaporization pipe , The evaporator located inside the vaporization tube, the flow controller located at the port of the vaporization tube, and the jet ports evenly located on the side of the vaporization tube toward the cooling chamber A, the circulation fan, the evaporator, and the flow controller are all electrically connected to the PLC controller. Through the utility model, the problems of long quick freezing time and poor quality can be overcome, and the liquid nitrogen energy can be fully utilized, and the production efficiency and economic benefits can be improved. High production efficiency and economic benefits. High production efficiency and economic benefits.

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