CN1224321C - Freezing method and device for food - Google Patents
Freezing method and device for food Download PDFInfo
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- CN1224321C CN1224321C CN 01135334 CN01135334A CN1224321C CN 1224321 C CN1224321 C CN 1224321C CN 01135334 CN01135334 CN 01135334 CN 01135334 A CN01135334 A CN 01135334A CN 1224321 C CN1224321 C CN 1224321C
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Abstract
The present invention relates to a secondary refrigerant freezing method which establishes an electric field in nonfreezing solution to carry out freezing, particularly to a food freezing device which is provided with a freezing tank, a motor-driven nonfreezing solution drive part, a motor-driven frozen object elevation part and a motor-driven freezing machine, wherein the freezing tank is used for accommodating nonfreezing solution; the drive part is arranged in the freezing tank; the elevation part supports frozen foods and soaked the foods in the freezing tank; the freezing machine is used for cooling the nonfreezing solution. The present invention is characterized in that the present invention has the structure that a high potential electric field generation device is arranged to establish an electric field in the nonfreezing solution, a correspondingly arranged floor supports the whole device in an electrical insulation mode, each motor is supported on an installation part in an electrical insulation mode, and simultaneously, the power of each motor is output through an electrical insulation belt.
Description
Technical field
The present invention relates to a kind of refrigerating medium (Block ラ イ Application) freezing method and the employed food product freezing unit of this method of food.
Background technology
As everyone knows, the freezing method of food generally has the method that makes the cold air contact in freezer, but, be difficult to the fully place of contact at cold airflow, for example, in the inboard of the food of suitably arranging, side, bottom etc. locate to be easy to generate freezing uneven phenomenon, in addition, because hot biography rate is low, the time of passing through maximum ice crystallization generating zone (1～-5 ℃) that is frozen food is long, and the water in the tissue of food (cell) becomes ice crystal, grows up, and causes disorganization, when thawing, become dropping liquid, become the main cause that quality worsens.Therefore, because the food that freezes to produce worsens, be very important by maximum ice crystallization generating zone at short notice in order to prevent.
Therefore, the someone has proposed air IQF method and has carried out freezing freezing method by liquid nitrogen, liquid carbon dioxide.In addition, utilize the low characteristics of solidification point of salt solution, calcium chloride water, propane diols and alcohol etc., directly frozen food is immersed in the refrigerating medium freezing practicability in these cold-producing mediums.The great advantage of this method is the big order of magnitude owing to the thermal conductivity ratio air of refrigerating medium solution, so freezing speed is fast, and the main cause that the quality of frozen food worsens-short by the time of maximum ice crystallization generating zone (1～-5 ℃).
But, at the milt of the weak mountain Yu (Chi さ ぴ) of freezing washy food, tissue (cell), chicken gizzard, fish etc. or resemble when having the food of solidification point difference lean meat and the fat meat, the problem that exists is, when thawing, produce shape lose shape, since the dropping liquid phenomenon that disorganization causes reduced with taste, chewed head or the relevant qualities such as mouthfeel of sense of taste.
Recently, someone attempts in cold air (freezer) and sets up special magnetic field, by producing faint electric current in food inside, by the magnetic resonance phenomenon hydrone in the food is vibrated, even produce ice crystal,, make the whiles such as starch, protein of moisture and raw-food material freezing with this induction freezing method (Daiwada Tetsuo's " Architectural Equipment and pipeline engineering " No. 11 1998) at the hydrone that also do not make below freezing, reduce the dropping liquid when thawing thus, the good frozen food of exploitation freshness.
Setting up magnetic field in air carries out the advantage of freezing induction freezing simultaneously and is, even the moisture in the food can not become ice crystal yet below 0～-5 ℃ temperature, the starch of moisture and raw-food material, protein etc. freeze simultaneously, because the water in the tissue does not become the ice crystal piece at first, so, do not produce dropping liquid.But it is very difficult setting up magnetic field with even and stable form in cold air in very big storehouse, needing to be not suitable for a large amount of productions of big volume.In addition, the freezing method of setting up magnetic field in refrigerating medium solution was not also attempted.
As previously discussed, in existing freezing method,,, also there is not the solution that can meet the demands owing to respectively length is arranged although wish to produce that freshness is good, mouthfeel, color and luster and taste excellence, the few frozen food of dropping liquid when thawing.
Summary of the invention
Therefore, purpose of the present invention, want to provide after thawing also with freeze before the same high-quality frozen food.
If the present invention will be described briefly, just provide a kind of by the electric field of in non freezing solution, setting up high potential, perfect refrigerating medium freezing method and the shortcoming of high potential electric field freezing, the manufacture method that can manufacture high-quality frozen food and the manufacturing installation removed.Promptly, method of the present invention, be that a kind of thing that will be frozen is immersed in and carries out freezing refrigerating medium freezing method in the non freezing solution, it is characterized in that: utilize the high potential electric field generation device, one of secondary side terminal of insulated enclosure transformer, and another terminal is connected to refrigerating medium solution, in its non freezing solution, set up electric field and carry out freezing.
The present invention has above-mentioned refrigerating medium freezing, responds to the various advantages of freezing freezing, and the shortcoming of also having got rid of both, high potential electric field energy in the solution is more even than airborne, can in the refrigerating medium in the refrigerating medium accepting groove of big volume, set up the high potential electric field, can handle a large amount of product that freeze.And, when freezing, also can reduce about 20% than existing refrigerating medium freezing for the quality of the food time very important, by maximum ice crystallization generating zone (1～-5 ℃).Consequently, can produce that freshness is good, mouthfeel and color and luster excellence, the few frozen food of dropping liquid when thawing.And, be applicable to existing freezing very difficult, horseradish that tissue (cell) is weak, the milt of fish etc., can obtain thawing afterwards that freshness reduces hardly, taste, mouthfeel and color and luster frozen food that do not reduce, that dropping liquid is few can be realized frozen foodization.In the food of the object as freezing method of the present invention, agricultural product such as livestock products such as aquatic products such as fish, shellfish, marine alga, shell-fish, fish-egg, ox, pig, chicken, egg, root vegetables, fruit are arranged, and their cooking processed goods, comprise all foods.
Food product freezing unit of the present invention possesses: the freezing tank of accommodating the non freezing solution that keeps low-temperature condition; Be arranged in this freezing tank, with electrical motor driven to stir inner non freezing solution or to make the non freezing solution drive division of its circulation; Be arranged to support and be frozen food and it is immersed in the non freezing solution in the above-mentioned freezing tank, is frozen the thing lifting unit with electrical motor driven; Refrigerator non freezing solution cooling usefulness, that use electrical motor driven, it is characterized in that: its structure is: the high potential electric field generation device is set, one of secondary side terminal of this device insulated enclosure transformer, and another terminal is connected to refrigerating medium solution, and make it in above-mentioned non freezing solution, set up electric field, be oppositely arranged the whole device of electric insulation ground, floor supporting, and, electric insulation ground is bearing in each above-mentioned electro-motor on the installation portion, simultaneously, and by of the power output of electric insulation belt with motor.
Because whole device is oppositely arranged the floor insulation of device and is supporting, so, can be by setting up electric field in the non freezing solution of high potential generating means in freezing tank with having no obstacle.In addition, because relative its installation portion insulation twelve Earthly Branches are honoured device and are carried out mechanically operated each drive source---electro-motor, and carry out the transmission of driving force by the insulated hull band, so, the high potential electric field generation device brings influence can for electro-motor one side, and each action part can move reliably.Therefore, can implement the method for the invention described above.As a kind of high potential electric field generation device, the high frequency potential generator of Kubo Yao Shi invention (special public clear 38-6106 number of Japanese patent gazette) is more suitable, according to experiment, it can be the current potential that can produce 5～100kv, one of secondary side terminal of insulated enclosure transformer is connected another terminal with refrigerating medium solution.High potential electric field generation device, the position of one of its insulated enclosure lead-out terminal are points, and electric current does not almost flow.The refrigerating medium solution that uses can be calcium chloride, ethylene glycol, propane diols, alcoholic solution or the mixed solution that they are mixed, but, preferably 50～68% alcohol water blend is cooled to-35～-57 ℃ and uses, be suitable for the freezing of food.
Description of drawings
Shown in Figure 1 is the simple structure of a form of implementation of device of the present invention, is local vertical profile front view (a), (b) is side view, (c) is vertical view.
Fig. 2 be expression embodiment 1 and comparative example 1, the curve map of maximum ice crystallization generating zone by temporal differences.
The specific embodiment
The form of implementation of the inventive method is to be cooled in-20～-50 ℃ the non freezing solution to set up an electric field with high potential of 5～100kv, and the product of putting in the container such as polyethylene that are frozen were soaked 10～60 minutes, makes frozen food.In addition, the employed refrigerating plant of this method is a device as shown in Figure 1.
Food product freezing unit 1 shown in Fig. 1 possesses: freezing tank 2, non freezing solution drive division 3, be frozen thing lifting unit 4, refrigerator 5 and high potential electric field generation device 6.
Freezing tank 2 is to use the heat insulating construction form of heat-insulating material, contains non freezing solution 7 in inside, supports the peristome decline of the rack 9 of frozen product 8 from the top opening, and it is immersed in the non freezing solution 2.This freezing tank 2 is bearing on the floor 7 by insulator 34.
Non freezing solution drive division 3 will be immersed in the above-mentioned non freezing solution 7 with the axle 11 of screw 10, make screw 10 rotations, stir non freezing solution, make it all be even temperature, or make its circulation, non freezing solution 2 contacts with the endothermic section 12 of refrigerator 5 well, and fully with its cooling, in addition, the non freezing solution of low temperature contacts with frozen product 8 in the above-mentioned rack 9 effectively, in order that it can be cooled off equably.The rotation of propeller shaft 11 is driven by electro-motor 13, with insulator 14 this electro-motor 13 is installed by insulation, and rotation is exported by insulation belt 15, for example exported by balata belt.Therefore, motor 13 is with the complete electric insulation of other parts of food product freezing unit 1.
Being frozen thing lifting unit 4 is to drive above-mentioned rack 9 liftings, above-mentioned rack 9 is bearing on the rack support 16, this rack support 16 can carry out lifting by 2 guide stanchion on the edge that stands in freezing tank 2 17 guiding, screws, is arranged on internal thread part 19 on the rack support 16 by the rotating threaded shaft 18 of setting in parallel between pillar 17,17 with it and drive it and move up and down.The rotation of leading screw 18 is driven by electro-motor.This motor 20 also with above-mentioned the same, is installed by insulator 21, exports by insulation belt 22.
The compressor section 23 of refrigerator 5 is arranged on the suitable place of freezing tank 2 sides, endothermic section (refrigerating coil) 12 is arranged on the bottom in the freezing tank 2, connect with coolant channel 25 between compressor section 23 and the endothermic section 12, compressor outside freezing tank and relative part are bearing on the floor 27 by insulator 26.In addition, the motor 28 of drive compression machine also is bearing on the floor by insulator 29 respectively, exports by insulation belt 30.
High potential electric field generation device 6 uses above-mentioned high frequency potential generator, this device is bearing on the floor 27 with insulator 31 by insulation, one of insulated enclosure secondary side terminal contacts the non freezing solution 7 in another secondary side terminal and the freezing tank 2 by the electrode 33 that is connected with lead 32.
This refrigerating plant makes refrigerator 5 and 3 actions of non freezing solution drive division in advance, the temperature of the non freezing solution 7 in the freezing tank 2 is reduced to below the set point of temperature, to be frozen product 8 is placed on the rack 9, make and be frozen 4 actions of thing lifting unit, be immersed in the non freezing solution 7, through after the stipulated time, rack is risen, the product of being frozen 8 are freezed in the high potential electric field.
Below the embodiment of the inventive method is described, but the present invention is not limited to these
Embodiment.
Embodiment 1
The many commercially available living beef of fat constituent that is cut into thick 80mm, each 80mm of length and width is packed in the Polythene Bag, deflate seal after,
Undertaken freezing by method of the present invention.150 liters of the alcohol water blends of non freezing solution 7 uses 55% are cooled to-35～-38 ℃ in advance, apply the current potential of 10kv for this chilled non freezing solution with high potential electric field generation device 6, soak above-mentioned beef.With the temperature changing process of the beef central part in the temperature sensor measurement immersion, its result is shown in Fig. 2 with curve A.In addition, in Fig. 2, as a comparative example 1, do not make 6 actions of high potential electric field generation device, just, under the state that does not apply electric field, other condition is identical, freezes identical beef, measures its temperature changing process, represents with curve B.
Fig. 2 shows, the passing through the time of maximum ice zone of a crystal (1～-5 ℃), and 7.5 minutes of embodiment 1 relatively, 9.5 minutes of comparative example 1, embodiment 1 approximately short 20%.Its reason can think that the moisture in the beef vibrates by applying the high potential electric field, and the atomic group of its water diminishes, and can load and reduce., after preserving 1 month under-30 ℃ the temperature, carry out nature and thaw at the freezing beef of this embodiment 1, comparative example 1, the result of trial test, the freshness of embodiment 1, delicious, comparative example 1 weaker slightly with comparing of embodiment 1.Not thinking has too big difference, and the color and luster after thawing is judged with photo, the color and luster before freezing relatively, and embodiment 1 is more approaching than comparative example 1, almost as broad as long degree before reaching embodiment 1 and freezing.
Embodiment 2
Peel off the skin of the bamboo shoots that just dug morning, in torso portion and the above-mentioned Polythene Bag of similarly packing into, be used as sample.The sample that will apply electric field when freezing, freezes under the condition identical with embodiment 1 is as embodiment 2, and will not apply electric field, the sample that under the condition identical, freezes as a comparative example 2 with comparative example 1, the sample that general freezer is freezed as a comparative example 3.After freezing, keeping was thawed with cold water after 10 days in identical-30 ℃ freezer, estimated its taste.It the results are shown in table 1.Numerical value in the table normally adds up to the mark that 8 judging panels estimate and the value that draws, the mark of evaluation, well be 3 minutes, common be 2 minutes, bad be 1 minute.The result of table 1 shows that the sample of embodiment 2 is good.
Table 1
| Embodiment 2 | Comparative example 2 (refrigerating medium freezing process) | Comparative example 3 (freezer freezing process) | |
| Color and luster | 22 | 18 | 11 |
| Mouthfeel | 21 | 17 | 9 |
| Overall merit | 22 | 19 | 10 |
Embodiment 3
2 glasss in water, 1/2 glass of wine, sweetener wine 6 soupspoons, granulated sugar 2 soupspoons, soy sauce 1/2 soupspoon are boiled cup, put into the milt 600g of fish, boil about 1/2 with the moderate heat liquor.The dish that boils of this milt is put into poly container seal, be used as the sample of freezing processing.Use the freezing processing of this sample to be divided into 3 classes: to be embodiment 3 according to method of the present invention; The comparative example 4 that is used for comparison according to the induction freezing with the cold air refrigeration; The comparative example 5 that freezes by common freezer.And (と う body ん ラ Star Network formula Off リ-ザ), the temperature of freezing product approximately needs 2 hours to-25 ℃ to netted the freezing of islander of induction freezing use ABI company.Thaw with flowing water after 7 days in keeping under-30 ℃ the temperature at the various product that freeze that will obtain, carry out flavor tests.It is the results are shown in table 2.Numerical value in the table normally adds up to the mark that 7 judging panels estimate and the value that draws, the mark of evaluation, well be 3 minutes, common be 2 minutes, bad be 1 minute.The result of table 2 shows that the sample of embodiment 3 is good.
Table 2
| Embodiment 3 | Comparative example 4 (cold air actinobolia) | Comparative example 5 (freezer freezing process) | |
| The dropping liquid amount | 19 | 16 | 7 |
| Mouthfeel | 20 | 14 | 11 |
| Overall merit | 18 | 16 | 11 |
In addition, particularly, the liquid measure that is dropped on the filter paper after each sample thawed is used as dropping liquid research, and embodiment 3, comparative example 4 almost be can not see, and comparative example 5 can definitely be seen.In addition, as the feeling of freshness of mouthfeel, thinking that embodiment 3 is best, secondly is that comparative example 4 is a little bit poorer slightly, comparative example 5 deficiencies, discharge order clearly.
Embodiment 4
Through over-cook handle add intend Lithodes (ず わ い crab) after, take out the meat of foot, put into the Polythene Bag sealing and make sample.Use the freezing processing of this sample to be divided into 3 classes: to be embodiment 4 according to method of the present invention; Be used for comparison, according to not applying the comparative example 6 of the solution refrigerating medium method of electric field; The comparative example 7 that freezer freezes.Non freezing solution when embodiment 4 and comparative example 6 are freezing all uses 50% alcohol water blend.Freeze product keeping under-30 ℃ temperature with what obtain, carry out the nature processing of thawing after 60 days, carry out flavor tests.It the results are shown in table 3.Numerical value in the table normally adds up to the mark that 7 judging panels estimate and the value that draws, the mark of evaluation, well be 3 minutes, common be 2 minutes, bad be 1 minute.In addition, with the language performance mouthfeel time, when crab has been, elastic force being arranged, the taste of crab is arranged, ジ ュ one シ one さ etc. is arranged, still, when crab when being bad, then do not have elastic force, is as the thing of chewing paper etc., and the numerical value in the table has reflected this situation.Table 3 shows embodiment 4 excellences clearly.
Table 3
| Embodiment 4 | Comparative example 6 (refrigerating medium freezing process) | Comparative example 7 (freezer method) | |
| Mouthfeel | 20 | 17 | 12 |
| The dropping liquid amount | 20 | 19 | 13 |
| Overall merit | 20 | 17 | 11 |
Embodiment 5
The Sheng Eutrema yunnanense is put into the Polythene Bag sealing make sample, use the freezing processing of this sample the same, be divided into 3 classes: be embodiment 5 according to method of the present invention with the occasion of embodiment 4; The comparative example 8 that does not apply high voltage electric field that is used for comparison according to solution refrigerating medium method; The comparative example 9 that freezer freezes.Thaw in that freezing product are carried out nature in keeping under-30 ℃ the temperature after 60 days, carry out the test relevant with taste.Consequently, in comparative example 8 and comparative example 9 living horseradish softnesses, with crash bed crash do not get off, but embodiment 5 is hard, freezing fresh living horseradish is not the same with having, can with crash bed crash get off.In addition, though at embodiment 5, originally crash following time sends the fragrance of horseradish,, thick flavor when comparative example 8 and comparative example 9 thaw.Hence one can see that, its tissue (cell), and not having of embodiment 5 is destroyed, and comparative example 8 and comparative example 9 is destroyed significantly.
So, it is better than existing refrigerating medium freezing significantly to draw such conclusion: embodiment 1～5.And embodiment 2～5 its frozen food are the weak or washy food of tissue, owing to freezingly cause that easily aspect the disorganization, the conditional request strictness can not get the result who wishes in the past.So, can obtain good result's reason, the same with having shortened of time of passing through maximum ice crystallization generating zone when embodiment 1 and comparative example 1 measured, embodiment 1, being because by applying the high potential electric field, also is the cause that time by maximum ice crystallization generating zone has shortened at embodiment 2～5.
A first aspect of the present invention has can make that freshness is good, mouthfeel, color and luster excellence, frozen food that dropping liquid is few, in addition, and freezing processing washiness, the weak food of tissue (cell) well, the effect that can carry out a large amount of processing.
A second aspect of the present invention has the effect of the invention that can implement the method that first aspect puts down in writing.
Claims (2)
1. refrigerating medium freezing method, to be frozen thing and be immersed in and carry out freezingly in the non freezing solution, it is characterized in that: utilize the high potential electric field generation device, one of secondary side terminal of insulated enclosure transformer, and another terminal is connected to refrigerating medium solution, in this non freezing solution, set up electric field and carry out freezing.
2. a food product freezing unit comprises: the freezing tank of accommodating the non freezing solution that keeps low-temperature condition; Be arranged in this freezing tank, with electrical motor driven to stir inner non freezing solution or to make the non freezing solution drive division of this non freezing solution circulation; Be arranged to support and be frozen food and it is immersed in the non freezing solution in the above-mentioned freezing tank, is frozen the thing lifting unit with electrical motor driven; Refrigerator non freezing solution cooling usefulness, that use electrical motor driven, it is characterized in that: its structure is: the high potential electric field generation device is set, one of secondary side terminal of this device insulated enclosure transformer, and another terminal is connected to refrigerating medium solution, and make it in above-mentioned non freezing solution, set up electric field, be oppositely arranged the whole device of electric insulation ground, floor supporting, and, electric insulation ground is bearing in each above-mentioned electro-motor on the installation portion, simultaneously, and by of the power output of electric insulation belt with motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01135334 CN1224321C (en) | 2001-09-29 | 2001-09-29 | Freezing method and device for food |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01135334 CN1224321C (en) | 2001-09-29 | 2001-09-29 | Freezing method and device for food |
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| Publication Number | Publication Date |
|---|---|
| CN1408284A CN1408284A (en) | 2003-04-09 |
| CN1224321C true CN1224321C (en) | 2005-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01135334 Expired - Fee Related CN1224321C (en) | 2001-09-29 | 2001-09-29 | Freezing method and device for food |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103168826B (en) | 2013-03-26 | 2014-05-07 | 华南理工大学 | Method for improving brine salting-process frozen fish fillets through variable-power ultrasonic wave |
| CN107758059A (en) * | 2017-11-20 | 2018-03-06 | 南京工业大学 | Food freezing and fresh-keeping device using magnetic field and micro-freezing liquid |
| CN108870829A (en) * | 2018-08-20 | 2018-11-23 | 长虹美菱股份有限公司 | A kind of freeze preservation device and control method |
| CN108981266B (en) * | 2018-09-25 | 2023-08-25 | 长虹美菱股份有限公司 | Freezing fresh-keeping refrigerator and control method thereof |
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Owner name: YONEDA-KOHKI-GROUP.CO. SHIKOKU KAKOKI CO., LTD. Free format text: FORMER OWNER: ALFA CORPORATION SHIKOKU KAKOKI CO., LTD. |
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