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Method and device for keeping fresh aquatic products by cold accumulation on board

A technology for aquatic products and cold storage, which is applied in household refrigeration devices, hull ventilation/heating/cooling, applications, etc. It can solve problems such as high energy consumption, high cost, and poor fresh-keeping quality, and achieve reduction in labor force, energy consumption, and The effect of waiting time

Inactive Publication Date: 2011-04-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the existing aquatic product fresh-keeping technology that cannot be applied to on-board operations, high energy consumption, high cost, and poor fresh-keeping quality, the present invention provides a method that is effectively adapted to on-board operations, reduces energy consumption, reduces costs, and improves Method and device for cold storage and fresh-keeping aquatic products on board with fresh-keeping quality

Method used

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  • Method and device for keeping fresh aquatic products by cold accumulation on board
  • Method and device for keeping fresh aquatic products by cold accumulation on board
  • Method and device for keeping fresh aquatic products by cold accumulation on board

Examples

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Embodiment 1

[0032] A method for cold storage and preservation of aquatic products on board. In this method, the brine in the cold storage tank is maintained at a temperature of -30°C to -5°C through the ship's refrigeration system in advance, and then the seawater in the cooling water tank and the cold brine in the cold storage tank are separated. Indirect cold and heat exchange reduces the seawater temperature in the cooling water tank to 10°C to -10°C, and the caught fish can be cooled in the cold seawater tank to quickly cool the fish body to the central temperature of -5°C to 10°C After reaching the cooling requirement.

[0033] The cooled fish catch is taken out and stored in the on-board refrigerator, and the brine in the cold storage tank is connected with the on-board refrigerator through a heat exchanger, so that the temperature in the on-board refrigerator is maintained at -5°C to 15°C. The low-temperature cold storage tank can also be connected to the refrigerator or refrigerat...

Embodiment 2

[0036] refer to figure 1, a device for cold storage and preservation of aquatic products on board, which includes a cold storage tank 6, a cooling water tank 14, and a ship-mounted refrigeration system, and the ship-mounted refrigeration system includes a compressor 4, a condenser 1, an expansion valve 2 and an evaporator 5 , the expansion valve 2 and the compressor 4 are respectively connected to both ends of the evaporator 5, one end of the condenser 1 is connected to the compressor 4, the other end of the condenser 1 is connected to the expansion valve 2, and the The evaporator 5 is submerged in the cold storage tank 6 , and the cold storage tank 6 is connected to the cooling water tank 14 through an indirect heat exchanger.

[0037] In this embodiment, the first water outlet and the first water inlet of the cold storage tank 6 communicate with one end of the indirect heat exchanger 10, and a first Water pump 9, the other end of the indirect heat exchanger 10 communicates ...

Embodiment 3

[0046] Such as figure 1 As shown, the outlet of the compressor 4 is connected to the inlet of the condenser 1, and the medium in the condenser 1 is cooled by ammonia as the refrigerant, flows from the outlet to the expansion valve 2, and then passes through the dry filter 3 to the evaporator 5. The cold storage tank 6 is filled with brine containing 25% (w / w) sodium chloride, the evaporator 5 is immersed in the brine, and exchanges heat and cold with the brine, cools down the brine and keeps it at -18°C . The low-temperature cold brine is transported to the plate heat exchanger 10 through the water pump 9 to exchange heat and cold with the seawater in the cooling water tank 14 of the heat exchanger 10 through the water pump 12, and the temperature of the sea water in the cooling water tank 14 is lowered to 0° C. Cool sea water.

[0047] The 500kg sea prawns caught on board are put into net bags and put into the cooling water tank 14 for cooling. During the cooling period, th...

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Abstract

The invention discloses a method for keeping fresh aquatic products by cold accumulation on board, which comprises the following steps of: keeping cold brine in a cold accumulation tank at the temperature of -30 to -5 DEG C in advance by using an onboard cooling system, performing indirect cold heat exchange on seawater in a cooling tank and the brine in the cold accumulation tank to decrease the temperature of the seawater in the cooling tank to 10 to -10 DEG C, and quickly cooling catches in the cooling seawater tank to the central temperature of-5 to 10 DEG C to meet cooling requirements. The invention also provides a device for keeping fresh the aquatic products by cold accumulation on board, which comprises the cold accumulation tank, the cooling seawater tank and the onboard cooling system. The method and the device for keeping fresh the aquatic products by cold accumulation on board are effectively adapted to onboard operation, reduce energy consumption and cost and improve the fresh-keeping quality.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping aquatic products, in particular to a method and device for cold storage and fresh-keeping aquatic products on board. Background technique [0002] After the seafood is caught, due to the death of the cells and tissues in the human body, it cannot inhibit the action of enzymes in the body and resist the invasion of microorganisms and their growth and reproduction, which eventually leads to spoilage of the seafood. However, as the temperature decreases, the action of microorganisms and enzymes will be weakened, and the speed of chemical reactions such as oxidation will also be significantly slowed down, so the freshness of seafood can be kept for a long time without spoilage. This is the principle of low-temperature preservation of aquatic products. [0003] At present, the fish fresh-keeping technology at home and abroad mainly adopts the method of cooling and fresh-keeping, especially in Ch...

Claims

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Application Information

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IPC IPC(8): B63J2/14F25D15/00
CPCY02T70/72Y02T70/00
Inventor 丁玉庭刘书来张建友吕飞王嘉文
Owner ZHEJIANG UNIV OF TECH
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