A spiral liquid nitrogen freezing equipment for aquatic products

Abstract

The invention discloses spiral liquid nitrogen refrigeration equipment for aquatic products, and aims to provide liquid nitrogen refrigeration equipment, which has high space utilization rate, long cooling gas path and high utilization rate of cooling capacity, and is capable of improving the refrigerating efficiency and overall freezing quality. The equipment comprises a refrigerating chamber, a vertical spiral conveyor for conveying aquatic product and arranged in the refrigerating chamber, and a turnover device arranged on the vertical spiral conveyor and for flipping aquatic products. The vertical spiral conveyor includes a support column and a spiral conveyor chain in spiral arising along the support column; the support column is provided with a plurality of liquid nitrogen spray nozzles extending around the spiral conveyor chain, and the liquid nitrogen spray nozzles are arranged downwards above the spiral conveyor chain; and the turnover device is arranged on the middle part of the support column, the turnover device is positioned above the spiral conveyor chain, and the turnover device comprises a horizontal transfer rail and a turnover mechanism mounted on the support column.

Description

technical field [0001] The invention relates to a freezing device, in particular to a spiral liquid nitrogen freezing device for aquatic products, especially fish. Background technique [0002] Aquatic product freezing refers to the use of low temperature conditions to inhibit the activity of autolyzed enzymes and the reproduction of attached microorganisms in aquatic products, and to slow down the chemical reactions such as lipid oxidation and non-enzymatic browning, so that they can maintain good quality during storage. Low temperature preservation method. The freezing of aquatic products generally includes two types of methods: refrigeration preservation and freezing preservation. Among them, the freezing preservation method mainly uses freezing equipment to quickly freeze fresh aquatic products. Liquid nitrogen freezing equipment has the characteristics of being able to quickly freeze products, pass through the ice crystal formation zone, prevent the formation of large ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the tunnel-type liquid nitrogen freezing equipment in the prior art. In the process of freezing aquatic products, a certain part of the aquatic product is always attached to the conveyor belt, which makes it difficult to maintain the original flavor of this part of the aquatic product. and quality, thereby reducing the freezing efficiency and overall freezing quality of aquatic products, providing a method that can effectively solve the above-mentioned deficiencies in tunnel-type liquid nitrogen freezing equipment in the prior art, and improve the overall freezing efficiency and freezing quality of aquatic products Spiral liquid nitrogen freezing equipment for aquatic products

The spiral liquid nitrogen freezing equipment for aquatic products in this scheme uses a vertical screw conveyor to transport aquatic products, which not only has high space utilization rate, but also has a long cooling gas path and high cooling utilization rate; at the same time, the vertical screw conveyor combined with the turning device is used to solve the existing technology. In the tunnel-type liquid nitrogen freezing equipment in the process of freezing aquatic products, because a certain part of the aquatic product is always attached to the conveyor belt, it is difficult to maintain the original flavor and quality of this part of the aquatic product, reducing the freezing efficiency and Overall freezing quality issues

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