Liquid nitrogen quick freeing machine for aquatic products

Abstract

Provided is a liquid nitrogen quick freeing machine for aquatic products. The to-be-solved technical scheme is to change original refrigerating fluid liquid ammonia into liquid nitrogen. The refrigerating efficiency of the liquid nitrogen is high, the refrigerating effect is good, and the short-time refrigerating temperature can reach -198 DEG C, therefore the freezing time can be greatly shortened (about 20 minutes), and the freezing consumption is reduced. The size of the freeing machine can be reduced, and the energy consumption is reduced; the liquid nitrogen used as a refrigerating fluidis safe and environmentally friendly. The liquid nitrogen quick freeing machine for the aquatic products is characterized by being composed of a liquid nitrogen storage tank, a freeing machine box body, a liquid nitrogen delivery pipe, a sub-box body, a solenoid valve, a temperature probe, a nitrogen spraying pipe, a liquid nitrogen nozzle, a liquid nitrogen evenly mixing motor, a conveyor belt, aCPU computer automatic controller and a freeing machine box body bracket.

Description

technical field [0001] The invention relates to a freezer, in particular to a liquid nitrogen quick freezer for aquatic products. Background technique [0002] As far as the applicant knows, aquatic products such as shrimps are generally manually peeled, rinsed, sterilized, and then transported to the single freezing workshop for freezing treatment. The frozen products are packaged and then sent to the cold storage for storage. In this process, liquid ammonia is generally used to freeze aquatic products at present. Using liquid ammonia to freeze aquatic products, liquid ammonia is unsafe and not environmentally friendly; the liquid ammonia freezing equipment is huge and consumes a lot of energy; the liquid ammonia freezing time is long (about one hour), the freezing consumption is large, and the freezing effect is poor (minimum up to -40°C). There has been no good solution to the above problems. Contents of the invention [0003] Aiming at the current freezing treatment...

AI Technical Summary

Problems solved by technology

[0003] For the current freezing treatment of aquatic products, liquid ammonia is generally used.

Using liquid ammonia to freeze aquatic products, liquid ammonia is unsafe and not environmentally friendly; the liquid ammonia freezing equipment is huge and consumes a lot of energy; the liquid ammonia freezing time is long (about one hour), the freezing consumption is large, and the freezing effect is poor (minimum Reach -40 ℃), propose a liquid nitrogen quick freezing machine for aquatic products

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