CN106234561B - Low-temperature freezing fresh preservation method and system for aquatic products - Google Patents
Low-temperature freezing fresh preservation method and system for aquatic products Download PDFInfo
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- CN106234561B CN106234561B CN201610653940.XA CN201610653940A CN106234561B CN 106234561 B CN106234561 B CN 106234561B CN 201610653940 A CN201610653940 A CN 201610653940A CN 106234561 B CN106234561 B CN 106234561B
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/14—Preserving with chemicals not covered by groups A23B4/02 or A23B4/12
- A23B4/18—Preserving with chemicals not covered by groups A23B4/02 or A23B4/12 in the form of liquids or solids
- A23B4/20—Organic compounds; Microorganisms; Enzymes
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/06—Freezing; Subsequent thawing; Cooling
- A23B4/062—Freezing; Subsequent thawing; Cooling the materials being transported through or in the apparatus with or without shaping, e.g. in the form of powder, granules or flakes
- A23B4/064—Freezing; Subsequent thawing; Cooling the materials being transported through or in the apparatus with or without shaping, e.g. in the form of powder, granules or flakes with packages or with shaping in the form of blocks or portions
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/06—Freezing; Subsequent thawing; Cooling
- A23B4/08—Freezing; Subsequent thawing; Cooling with addition of chemicals or treatment with chemicals before or during cooling, e.g. in the form of an ice coating or frozen block
- A23B4/09—Freezing; Subsequent thawing; Cooling with addition of chemicals or treatment with chemicals before or during cooling, e.g. in the form of an ice coating or frozen block with direct contact between the food and the chemical, e.g. liquid N2, at cryogenic temperature
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/14—Preserving with chemicals not covered by groups A23B4/02 or A23B4/12
- A23B4/18—Preserving with chemicals not covered by groups A23B4/02 or A23B4/12 in the form of liquids or solids
- A23B4/24—Inorganic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Polymers & Plastics (AREA)
- Microbiology (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
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- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a low-temperature freezing fresh preservation method and low-temperature freezing fresh preservation system for aquatic products. The fresh preservation method comprises the following steps that 1, anti-oxidation treatment is conducted on the aquatic products through an anti-oxidation solution for 2 minutes to 10 minutes; 2, vacuum packaging is conducted on the aquatic products subjected to anti-oxidation treatment; 3, low-temperature refrigeration treatment is conducted on the vacuum-packaged aquatic products through low-temperature active liquid, wherein the temperature of the low-temperature active liquid ranges from minus 45 DEG C to minus 35 DEG C, and the refrigeration treatment time ranges from 10 minutes to 30 minutes. According to the automated low-temperature freezing fresh preservation system for the aquatic products, the aquatic products can be in an anti-oxidation state in a low-temperature storage environment, and it is guaranteed that the quality of the aquatic products is not affected in the storage process.
Description
Technical field
The present invention relates to an organism cryogenic freezing technology, and in particular to be a kind of Aquatic product based on anti-oxidation tech
Product freezing fresh-keeping system.
Background technology
Refrigeration Technique is widely used in aquatic products storage, transport and sales process.It is different from domestic animal birdss, aquatic products
Containing abundant oils and fatss, the fat content of part Fish has exceeded itself 30%.Oils and fatss are easily sent out during aquatic products storage
The phenomenon of raw oxidation, so as to cause aquatic products discoloration, rotten and corruption.Meanwhile, cryogenic freezing technology the most frequently used at present, by water
Product is directly placed in freezer and is transported, stored or processed after freezing.But this process is usually used air as medium
Aquatic products are cooled down.Because air conduction coefficient is low, aquatic products are cooled to set freezen protective temperature and need experience from room temperature
Up to several hours.This slow refrigerating process can cause the intracellular generation ice crystal of aquatic products, cause cell wall（Film）Rupture,
Cytoplasm hydrorrhea goes out.In addition, in air ambient, aquatic products refrigerating process can not kill completely thin on face attached thereto
Bacterium.At low temperatures, the antibacterial on aquatic products surface can't be freezed to death completely, and simply vigor is temporarily restrained.Once
Aquatic products are taken out under low temperature environment, and antibacterial will regain growing environment.Oxygen in air equally can be aoxidized constantly
The oils and fatss of aquatic products, destroy the nutrient of aquatic products.So, aquatic products are preserved more than after the several months in freezer, it may occur that cell is dead
Die, Oxidation of Fat and Oils causes aquatic products to go bad.In addition, the single batch of the aquatic products of each capture of fishing boat or plant processes water
Product, usual enormous amount, processing procedure is complex, and traditional manual single-piece freezing processing method cannot meet and increasingly increases
The freezing processing demand of long aquatic products.Therefore, in the urgent need to developing a kind of aquatic products antioxidation freezing automatic business processing skill
Art, being capable of mass disposal aquatic products so that freezing state is immediately entered after anti-oxidant treatment at short notice, while keeping away
Exempt from oils and fatss to be oxidized, extend the holding time.
It is known that the thermal conductivity ratio air of liquid is much larger, therefore aquatic products are freezed using cryogenic liquid
Process can greatly accelerate the refrigerating process of aquatic products.Simultaneously liquid can completely cut off air, prevent the Oxidation of Fat and Oils in aquatic products.Separately
Outward, solution temperature is maintained to be in particular temperature levels（Such as -35 DEG C）Also can oil-control oxidation reaction.Conventional refrigeration machine
With higher refrigeration performance during more than 10 DEG C of the cryogenic temperature of group, once at low temperatures（Such as less than -30 DEG C）Refrigeration
Efficiency is low, it is difficult to mass disposal aquatic products.Accordingly, it would be desirable to introduce a kind of new refrigeration system ensure at cryogenic fluid freezing
The reliability of reason aquatic products, and automatic technology is combined, mass processes aquatic products.
The content of the invention
Present invention aim at improving drawbacks described above of the prior art, there is provided a kind of aquatic products based on anti-oxidation tech
Automatization's freezing preservation method and system, first with anti-oxidant solution and oxygen uptake plastic film packaging so that aquatic products
All the time in antioxidation environment.Simultaneously using vacuum packaging isolation air, it is ensured that aquatic products are during freezing and storage
All avoid Oxidation of Fat and Oils.The heat transfer property for recycling liquid stronger than air, reaches the temperature-fall period that organism is completed in the short time,
Make it into freezing state.Introduce new refrigerating plant to cause solution-stabilized to maintain the suitable temperature of preservation of fishery.It is whole
Body processing meanss central control computer automatically controls operation, realizes that the rapid batch that aquatic products are freezed is automatically processed.
Technical scheme
In order to improve the defect on convention freezing techniques, the technical solution used in the present invention is：
A kind of aquatic product low temperature freeze preservation method, it is characterised in that step is：
Step one, using anti-oxidant solution aquatic products are carried out with anti-oxidant treatment, the time of anti-oxidant treatment is 2 ~ 10 points
Clock；
Step 2, the aquatic products after anti-oxidant treatment are vacuum-packed；
Step 3, using low temperature vigor liquid vacuum-packed aquatic products are carried out with cryogenic refrigeration process, low temperature vigor liquid
Temperature is -45 DEG C～-35 DEG C, and the time for processing of freezing is 10 ~ 30 minutes.
The anti-oxidant solution is made up of the following components of mass percent：5 ~ 15% Sodium Chloride, 4 ~ 10% ethanol, 3 ~
5% glycerol, 1 ~ 5% flavonol, 1 ~ 5% anthocyanin, 3 ~ 5% Fructose, remaining is distilled water.
The composition of the vigor liquid is：0.5 ~ 8% Sodium Chloride, 0.1 ~ 2% magnesium chloride, 5 ~ 12% ethanol, 7 ~ 10%
Glycerol, 2 ~ 5% chitin, remaining is distilled water.
The aquatic products are fish, shrimp, shell etc..
A kind of aquatic product low temperature freeze preservation system, it is characterised in that：Including central control computer, anti-oxidant treatment
System, vacuum oxygen absorbing film packaging subsystem, vigor liquid freezing subsystem and hutch；
The anti-oxidant treatment subsystem, including anti-oxidant treatment pond and the mobile pallet for placing aquatic products；
The vigor liquid freezing subsystem includes freezing pond and places the mobile platform of aquatic products；
The central control computer control is placed with the described mobile pallet of aquatic products and is put in antioxidation pond in immersion simultaneously
Mobile pallet is taken out from antioxidation pond by the time for setting；It is thin that the central control computer controls the vacuum oxygen uptake
Film packs subsystem and the aquatic products taken out from the oxidation pond is vacuum-packed；The central control computer control is moved
Moving platform is put in freezing pond in immersion and is taken out mobile platform from low temperature indifference pond by the time of setting.
Aquatic products are vacuum-packed using oxygen absorbing film, the oxygen absorbing film is deoxidizer polyisoprene and ethyl
Cellulose is polymerized.
The vigor liquid freezing subsystem also include step refrigeration unit, the step refrigeration unit include condenser,
High pressure stage compressor, low-pressure stage compressor, intercooler, vaporizer, first throttle valve and second throttle, the vaporizer
One end is connected by first throttle valve with the intercooler, and the vaporizer is connected with the low-pressure stage compressor, described
Condenser is connected with the high pressure stage compressor, and the intercooler includes first medium passage and second medium passage, institute
State vaporizer and loop is connected to form by first throttle valve and the first medium passage, the condenser passes through second throttle
Loop is connected to form with the second medium passage, freezing pond is located in vaporizer.
The cold-producing medium that the step refrigeration unit is adopted is for R717 or R22.
Different from domestic animal birdss, aquatic products contain abundant oils and fatss, and the fat content of part Fish has exceeded itself
30%.Easily there is the phenomenon for aoxidizing in oils and fatss, during aquatic products storage so as to cause aquatic products discoloration, rotten and corruption.This
Invention employs the oxidation reaction of anti-oxidant solution and vacuum oxygen absorbing film packaged combination oil-control.Group in anti-oxidant solution
Dividing has following effect.Flavonol is a kind of natural plants compound, in being widely present in fruits and vegetables, as a kind of natural
Antioxidant, can remove free radical, and effectively suppress the negative cytochemistry change of free yl induction.Anthocyanin, extensively deposits
Be plant the Cell sap of flower, fruit, stem, leaf and root organ in, the multiple phenolic hydroxyl groups in its structure, suppress free radical product
Free radical is directly removed in life, reaches antioxidative effect.Sodium Chloride not only can reduce the freezing point of solution, it is also ensured that living
The osmotic pressure of power liquid is in much the same level with aquatic products cell, cell rupture can be prevented effectively from, while Sodium Chloride also has
There is certain bacteria-eliminating efficacy.Ethanol is added in oxidation resistance liquid, the freezing point of oxidation resistance liquid can be greatly reduced so that oxidation resistance liquid exists
Also in liquid phase state under low temperature condition.Glycerol is a kind of important cryoprotective agent, in glycerol adds oxidation resistance liquid, glycerol
Can penetrate into intracellular, concentrate or combine ICW, and glycerol also has diluting effect, can reduce oxidation resistance liquid and Aquatic product
Osmotic pressure between product cell tissue.Fructose contains in most fruits, is used as by the osmosiss of itself extracellular anti-
Cryoprotective agent and work.The composition of oxygen absorbing film packaging has following effect.Polyisoprene is a kind of conventional deoxidizer.
Ethyl cellulose film.Convenient polymerization.Aquatic products are vacuum-packed, can more effectively completely cut off aquatic products and oxygen is carried out
Contact, prevents the oils and fatss in aquatic products to be oxidized.
The various constituents of vigor liquid have following effect.Sodium Chloride and magnesium chloride are the main salts in sea water and fresh water
Composition, the component content for regulating and controlling Sodium Chloride and magnesium chloride ensure that aquatic products are stored in the solution similar with primary dis environment
In so that the osmotic pressure of vigor liquid is in much the same level with organism, cell rupture can be prevented effectively from, additionally, chlorination
Sodium not only has certain bacteria-eliminating efficacy, can also reduce the freezing point of solution, it is also ensured that.Ethanol as a kind of Organic substance,
With certain reproducibility, aquatic products can be played with antioxidative protective effect.The vigor liquid of ethanol is added simultaneously, and it coagulates
Solid point substantially reduces, it is ensured that vigor liquid is in liquid phase state for -45 DEG C～-35 DEG C in operating temperature.Glycerol is a kind of important low
Warm protective agent, while also having moisturizing, high activity, antioxidative function.Chitin is present in a large number in aquatic products such as shrimp, Eriocheir sinensiss
In shell, in Crustaceanses content up to 58% ~ 85%, its substantial amounts of hydroxyl for containing and amino, can effectively remove hydroxyl from
By base, with stronger non-oxidizability.Sodium Chloride, magnesium chloride, ethanol, glycerol, chitin this several vigor liquid component coupling
Under cooperation is used so that aquatic products hardly come to harm under low temperature vigor pendular ring border, can be in effective antioxidation environment,
Realize optimal organism stored frozen.
Traditional single-stage refrigeration when more than 10 DEG C of cryogenic temperature with higher refrigeration performance, once at low temperatures
（Such as less than -30 DEG C）Refrigerating efficiency is low.This is reduced mainly due to the actual aspirated volume of compressor, and refrigerating capacity is reduced, throttling
Loss increases, and coefficient of refrigerating performance declines.Freezed using step compression, the delivery temperature of compressor can be reduced, reduce pressure ratio, subtracted
Few restriction loss.Vigor liquid temp is set as -35 DEG C or so.When cryogenic temperature is set as -35 DEG C, according to aquatic products intracellular fluid
Body heat mechanics and hydrodynamic characteristic, intracellular fluid is changed to glassy state, it is intracellular can not solidified water ratio reach it is beneficial
Value, while water viscosity now is higher.The state is proved to effectively be maintained in the fishery product protein activity of freezing state.
Beneficial effect
（1）The present invention is carried out at fast cooling using the strong refrigeration in vigor liquid at low temperature to room temperature aquatic products
Reason, from ice crystal injury.
（2）Using anti-oxidant solution and oxygen absorbing film, suppressed in aquatic products by wherein antioxidant and deoxidant ingredient
Aquatic products, in combination with vacuum packaging starvation, are carried out anti-oxidation protection by the oxidation reaction of oils and fatss.
（3）Aquatic products are freezed using step compression refigerating machine group, the unit can reduce the aerofluxuss temperature of compressor
Degree, reduces pressure ratio, reduces restriction loss.
Description of the drawings
Fig. 1 anti-oxidant treatment subsystems；
Fig. 2 vacuum oxygen absorbing film packs subsystem；
Fig. 3 vigor liquid freezing subsystems；
Fig. 4 step refrigeration units.
In figure：1 movement pallet；2 anti-oxidant solutions；3 anti-oxidant solution ponds；4 aquatic products；5 mobile bars；6 oxygen absorbing film bags；
7 vacuum packing machines；8 vacuum-packed aquatic products；9 mobile platforms；10 freezing ponds；11 vigor liquid；12 vaporizers；13 low pressure
Compressor；14 intercoolers；15 first throttle valves；16 high pressure compressors；17 condensers；18 second throttle.
Specific embodiment
Further described in detail with reference to specific embodiments and the drawings：
Aquatic products automatization freezing fresh-keeping system of the present invention based on anti-oxidation tech, need to adopt anti-oxidant solution pair
Aquatic products are processed, and anti-oxidant solution 2 is prepared according to the component of following mass percentage content：5 ~ 15% Sodium Chloride, 4 ~
10% ethanol, 3 ~ 5% glycerol, 1 ~ 5% flavonol, 1 ~ 5% anthocyanin, 3 ~ 5% Fructose, remaining is distilled water.Antioxidation
Antioxidant flavonol and anthocyanin effective protection in the solution cell of aquatic products so as to process after and stored
Not by the dioxygen oxidation in air in journey.Oxygen absorbing film is polymerized by deoxidizer polyisoprene and ethyl cellulose.It is poly- different
Pentadiene can absorb oxygen, slow down the Oxidation of aquatic products as deoxidizer.For the vigor liquid of refrigeration, according to following
Mass percentage content is prepared：0.5 ~ 8% Sodium Chloride, 0.1 ~ 2% magnesium chloride, 5 ~ 12% ethanol, 7 ~ 10% glycerol,
2 ~ 5% chitin, remaining is distilled water.Sodium Chloride, magnesium chloride in vigor liquid, ethanol, glycerol, chitin ensure that water
Product hardly comes to harm under low temperature vigor pendular ring border, in effective antioxidation environment.
Anti-oxidant treatment subsystem is grasped as shown in figure 1, aquatic products 4 are placed on mobile pallet 1 by central control computer
Translational speed of the mobile pallet 1 of control in mobile bar 5, and cause mobile pallet 1 when 3 top of anti-oxidant solution pond is moved to,
Mobile pallet 1 is declined until submerging in anti-oxidant solution 2.After aquatic products 4 soak 10 minutes in anti-oxidant solution, rise
Mobile pallet 1, and move forward.
Vacuum oxygen absorbing film pack subsystem as shown in Fig. 2 when move pallet 1 be moved to oxygen absorbing film 6 top of bag when,
The mobile pallet 1 of central control computer operation is inclined so that aquatic products 4 fall into from the opening of the top of oxygen absorbing film bag 6.Subsequently
Oxygen absorbing film bag 6 is moved in vacuum packing machine 7, carries out Vacuum Package, obtains vacuum-packed aquatic products 8.Vacuum packaging energy
It is enough that air and aquatic products isolation come, all avoid aquatic products to contact with oxygen during freezing processing and storage.
Vigor liquid freezing subsystem is as shown in figure 3, open step refrigeration system, there is provided cold is by freezing pond 10
In vigor liquid 11 be cooled to -35 DEG C.A collection of vacuum-packed aquatic products 8 are placed on mobile platform 9, mobile platform is controlled
9 submerge vigor liquid 11, and to aquatic products frozen cooling is started.Mobile platform 9 rises after 30 minutes, and by vacuum-packed aquatic products
8 deliver to stored frozen in the hutch with air ambient.Temperature control in hutch is at -35 DEG C.
As shown in figure 4, step refrigeration unit is made up of condenser 1, high temperature compressor 2, choke valve 3, evaporative condenser 4.
Low temperature compression cooling cycle system is by vaporizer 12, low pressure compressor 13, intercooler 14, first throttle valve 15, high pressure pressure
Contracting machine 16, condenser 17, second throttle 18 are constituted.Steaming after low pressure compressor 13 compresses is cooled down using intercooler 14
Vapour, is then fed into being compressed to condensing pressure in high pressure compressor 16.
Embodiment 1
Saury is put into and is considered simultaneously in the anti-oxidant solution that saury feature is prepared according to formula in advance.Antioxidation is molten
Liquid composition is：10% Sodium Chloride, 8% ethanol, 3% glycerol, 1% flavonol, 2% anthocyanin, 3% Fructose, remaining is
Distilled water.Saury is placed in after soaking 10 minutes in anti-oxidant solution, is vacuum-packed saury with oxygen absorbing film.Configuration is lived
Power liquid, vigor liquid composition is：3% Sodium Chloride, 0.5% magnesium chloride, 10% ethanol, 8% glycerol, 4% chitin, remaining
For distilled water.Step refrigeration unit is opened, packaged saury is placed in -35 DEG C of vigor liquid and is freezed 30 minutes.Subsequently
Saury is taken out, and is put into preservation 12 months in the stored frozen warehouse with air ambient.Saury was taken out every 2 months to enter
Row degree of oxidation is detected.The peroxide value of saury, all the time in 1meg/kg or so, was compared unprocessed during 12 months
Saury, peroxide value reduces 80%.Prove that the processing method can effectively preserve aquatic products.
Claims (7)
1. a kind of aquatic product low temperature freeze preservation method, it is characterised in that step is：
Step one, using anti-oxidant solution aquatic products are carried out with anti-oxidant treatment, the time of anti-oxidant treatment is 2 ~ 10 minutes；
Step 2, the aquatic products after anti-oxidant treatment are vacuum-packed；
Step 3, using low temperature vigor liquid vacuum-packed aquatic products are carried out with cryogenic refrigeration process, the temperature of low temperature vigor liquid
For -45 DEG C～-35 DEG C, the time for processing of freezing is 10 ~ 30 minutes；The anti-oxidant solution by mass percent following components
Composition：5 ~ 15% Sodium Chloride, 4 ~ 10% ethanol, 3 ~ 5% glycerol, 1 ~ 5% flavonol, 1 ~ 5% anthocyanin, 3 ~ 5% fruit
Sugar, remaining is distilled water.
2. aquatic product low temperature freeze preservation method according to claim 1, it is characterised in that the vigor liquid is comprising following
The component of mass percent：0.5 ~ 8% Sodium Chloride, 0.1 ~ 2% magnesium chloride, 5 ~ 12% ethanol, 7 ~ 10% glycerol, 2 ~ 5%
Chitin, remaining is distilled water.
3. aquatic product low temperature freeze preservation method according to claim 1, it is characterised in that the aquatic products are fish, shrimp
Or shell.
4. a kind of aquatic product low temperature freeze preservation system, it is characterised in that：Including central control computer, anti-oxidant treatment subsystem
System, vacuum oxygen absorbing film packaging subsystem, vigor liquid freezing subsystem and hutch；
The anti-oxidant treatment subsystem, including anti-oxidant treatment pond and the mobile pallet for placing aquatic products, it is described anti-
Anti-oxidant solution in oxidation processes pond is made up of the following components of mass percent：5 ~ 15% Sodium Chloride, 4 ~ 10% ethanol,
3 ~ 5% glycerol, 1 ~ 5% flavonol, 1 ~ 5% anthocyanin, 3 ~ 5% Fructose, remaining is distilled water；The vigor liquid low temperature cold
Freezing subsystem includes freezing pond and places the mobile platform of aquatic products；
The central control computer control is placed with the described mobile pallet of aquatic products and is put in antioxidation pond in immersion and passes through
The time of setting takes out mobile pallet from antioxidation pond；The central control computer controls the vacuum oxygen absorbing film bag
Dress subsystem is vacuum-packed to the aquatic products taken out from the oxidation pond；The central control computer control is mobile flat
Platform is put in freezing pond in immersion and is taken out mobile platform from low temperature indifference pond by the time of setting.
5. a kind of aquatic product low temperature freeze preservation system according to claim 4, it is characterised in that：To aquatic products using suction
Oxygen thin film is vacuum-packed, and the oxygen absorbing film is polymerized for deoxidizer polyisoprene with ethyl cellulose.
6. a kind of aquatic product low temperature freeze preservation system according to claim 4, it is characterised in that：The vigor liquid low temperature
Freezing subsystem also includes step refrigeration unit, and the step refrigeration unit includes condenser, high pressure stage compressor, low-pressure stage compression
Machine, intercooler, vaporizer, first throttle valve and second throttle, described vaporizer one end is by first throttle valve and institute
Intercooler connection is stated, the vaporizer is connected with the low-pressure stage compressor, and the condenser compresses with the hiigh pressure stage
Machine connects, and the intercooler includes first medium passage and second medium passage, and the vaporizer passes through first throttle valve
Loop is connected to form with the first medium passage, the condenser is connected by second throttle with the second medium passage
Loop is formed, freezing pond is located in vaporizer.
7. a kind of aquatic product low temperature freeze preservation system according to claim 6, it is characterised in that：The step refrigeration machine
The cold-producing medium that group is adopted is for R717 and R22.
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