CN107373296A - A kind of radio frequency heating apparatus uniformly to thaw - Google Patents
A kind of radio frequency heating apparatus uniformly to thaw Download PDFInfo
- Publication number
- CN107373296A CN107373296A CN201710812218.0A CN201710812218A CN107373296A CN 107373296 A CN107373296 A CN 107373296A CN 201710812218 A CN201710812218 A CN 201710812218A CN 107373296 A CN107373296 A CN 107373296A
- Authority
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- China
- Prior art keywords
- radio frequency
- thaw
- frequency heating
- heating apparatus
- media containers
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/62—Apparatus for specific applications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
- A23L3/365—Thawing subsequent to freezing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/60—Arrangements for continuous movement of material
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
Abstract
A kind of radio frequency heating apparatus uniformly to thaw, including radio heater, media Containers and heat exchanger；The media Containers are arranged between the two-plate of radio heater, and medium solution is full of in the media Containers, and the media Containers upper end sets opening, are treated that unfrozen object is immersed in media Containers and are thawed by radio heater.The present invention develops a kind of extensive radio frequency thawing apparatus of application, improve unfreezing quality, edge heating effect that can both in solution rule object, solve non-regular shape object again causes magnetic distribution inequality to heat uneven phenomenon caused by parallel plate electrode by uneven thickness, tunnelling container and its interior media solution are reusable, improvement cost is low on the original basis for equipment, additional operating cost is low, it is easy to operate, applicability is wide, and can realize a variety of different volumes and shape freezing object while rapidly and uniformly industrialization defrosting.
Description
Technical field
The invention belongs to material processing field, and in particular to one kind can uniformly thaw the pre-packaged freezing of various complicated shapes
The radio frequency heating apparatus of object.
Background technology
Rf wave is 1-300MHz electromagnetic wave, ion, atom, molecule of the frequency electromagnetic waves by encouraging food product etc.
Microcosmic particle vibrates or rotated so that food product is integrally rapidly heated, and reaches the rapid effect integrally heated.Typical radio frequency
It is heated to be parallel plate electrode formula, as shown in figure 1, i.e.：Two pieces of pole plates that frequency electromagnetic waves access is placed in parallel, high voltagehigh frequency electric field
Food entirety is acted on, electromagnetic energy is converted to heat energy, food is so as to heated.Radio frequency heating be avoided that traditional heating mode because
Heat from outside to inside and be limited to heat source temperature and the thermal conduction characteristic of food in itself causes firing rate slow, can be fast by material
Speed is warming up to required temperature so that the lifting that the quality of processed food can be by a relatively large margin, suitable for food drying, defrosting, sterilizing,
Most food hot-working fields such as desinsection, enzyme deactivation.Rf wave penetration depth in food is more than microwave, more suitable for bulk material
Heating application, as bulk freezing livestock products, aquatic products defrosting, drying, the deinsectization of large agricultural product (fruits and vegetables, cereal etc.)
Deng.
Radio-frequency technique can be by frozen product quick-thawing to required temperature (10~20 minutes).But due to flat heater chamber
Plate designs limitation, the edge of regular shape food has concentration heating effect, and non-regular shape food is in parallel plate electrode
In Energy distribution can be caused uneven, cause unfreezing quality to have notable difference.The reason for Energy distribution inequality is that electromagnetic field exists
Being heated material edge has concentration effect, second, the vertical range between pole plate and food is different so that electromagnetic field intensity point
Cloth is different.Corner concentration effect refers to that electric field is intended to from every when there is two or more surfaces to cross at a certain angle
Individual surface passes perpendicularly through so that electric-field intensity is higher in the edge that these cross, and causes the edge rate of heat addition far above food
Product core.In order to solve corner concentration effect, patent document 1 (publication number CN101115406A) elaborates this problem, but
Only solve the homogeneity question of the regular shape such as cuboid, cylinder frozen food defrosting in partial extent, can not be applied to
The temperature of complete irregular frozen food radio frequency course of defrosting and greater homogeneity lifting.
The content of the invention
1st, technical problems to be solved
The defects of causing some position food qualities to deteriorate for radio heater defrosting inequality existing for solution prior art,
The present invention proposes a kind of radio frequency heating apparatus that can be widely applied to variously-shaped frozen food and uniformly thaw.
2nd, technical scheme
The purpose of the present invention is mainly realized by following technical scheme.
A kind of radio frequency heating apparatus uniformly to thaw of the present invention, including radio heater and media Containers；The radio frequency
Heater includes radio-frequency signal generator, electric pole plate and bottom electrode plate, and the media Containers are arranged on the electric pole plate and described
Between bottom electrode plate, the media Containers are built with medium solution, for that will treat that unfrozen object immerses the medium when thawing
Hold in liquid and thawed together through radio heater.
Further, liquid medium solution be freezing point less than -20 DEG C, low toxicity and during radio frequency heating heating it is fast
Rate, which is less than, treats unfrozen object heating rate.
Further, the medium solution is ethanol solution.
Further, the media Containers are made up of the material being not easy by radio frequency heating.
Further, it is described to be not easy to include Teflon or polypropylene by the material of radio frequency heating.
Further, temperature setting of the ethanol solution before defrosting is identical with treating unfrozen object temperature.
Further, in addition to heat exchanger, the media Containers are connected with the heat exchanger so that the medium is molten
Liquid carries out temperature control circulation by heat exchanger, and the heat exchanger also includes temperature feedback system, and the temperature feedback system is used
In the temperature for detecting the medium solution and the heat exchanger is fed back to, the heat exchanger is according to the temperature feedback system
Feedback control described in medium solution temperature.
Further, it is additionally provided with liquid level sensor in the media Containers.
Further, be additionally provided with conveyer belt, for by the electric pole plate of object continuous conveying to radio heater and under
Between battery lead plate.
3rd, beneficial effect：
Compared with prior art, a kind of beneficial effect of radio frequency heating apparatus uniformly to thaw of the invention is：
Many common frozen food, such as whole chicken, diad or tetrad ox can not make regular shape, be thawed in radio frequency
During there is poor defrosting uniformity.Common general radio heater is parallel plate electrode formula heater on the market, is put down
It is air dielectric between row pole plate, food defrosting lack of homogeneity.The present invention develops a kind of extensive frozen food radio frequency of application
Thawing apparatus, defrosting food quality is improved, be capable of the corner concentration effect of both solution rule food, solve non-regular shape again
Food causes magnetic distribution inequality to heat uneven phenomenon caused by parallel plate electrode by uneven thickness, Teflon or
Polypropylene tunnelling container is fixing device, can add or further transfer belt does not realize two kinds of modes of production of batch and continous way,
Ethanol solution and it can be used by temperature-controlling system circulating repetition, and nontoxic, cost is low, and by the way that food is pre-packaged, makes food
Product surface is completely immersed in medium solution so that food uniformly heats in all directions, is advantageous to the uniformity of food defrosting.Equipment exists
Improvement cost is low on original base, it is only necessary to increases media Containers and medium solution on the basis of existing technology, you can real
The uniformity of existing food defrosting, operating cost is low, easy to operate, and applicability is wide, and can realize a variety of different volumes and shape freezing
Quick uniform thaws food simultaneously.
Brief description of the drawings
Fig. 1 is parallel plate electrode formula radio heater sketch.
Fig. 2 is the structural representation of the radio frequency heating apparatus batch defrosting embodiment of the present invention.
Fig. 3 is the structural representation of the radio frequency heating apparatus continous way defrosting embodiment of the present invention.
Fig. 4 is the structural representation of the another embodiment of radio frequency heating apparatus continous way defrosting of the present invention.
In figure：1- radio-frequency signal generators, 2- electric pole plates, 3- bottom electrode plates, 4- food, 5- media Containers, 6- open wide opening,
7- heat exchangers, 8- medium solutions, 9- conveyer belts.
Embodiment
Hereinafter, the specific embodiment of the present invention is described in detail refer to the attached drawing, detailed according to these
Description, one of ordinary skill in the art can implement the present invention it can be clearly understood that the present invention.Without prejudice to the principle of the invention
In the case of, the feature in each different embodiment can be combined to obtain new embodiment, or is substituted some
Some features in embodiment, obtain other preferred embodiments.
Fig. 2 shows a kind of radio frequency heating apparatus uniformly to thaw formed according to the preferred embodiment of the present invention.Such as Fig. 2 institutes
Show, a kind of radio frequency heating apparatus uniformly to thaw, including radio heater, media Containers 5 and heat exchanger 7；The radio frequency adds
Hot device includes radio-frequency signal generator 1, electric pole plate 2 and bottom electrode plate 3, and the media Containers 5 are arranged on the electric pole plate 2 and institute
Between stating bottom electrode plate 3, medium solution 8 is full of in the media Containers 5, the upper end of media Containers 5 sets opening 6, described
Opening 6 is used to treat picking and placeing for defrosting food 4, and the media Containers 5 are connected with the heat exchanger 7 so that the medium solution
Temperature control circulation is carried out by heat exchanger 7, the heat exchanger 7 also includes temperature feedback system, and the temperature feedback system is used
In the temperature for detecting the medium solution and the heat exchanger 7 is fed back to, the heat exchanger 7 is according to the temperature feedback system
The temperature of medium solution described in the feedback control of system, and the inwall of media Containers 5 is provided with liquid level sensor, for detecting medium
The liquid level of solution 8, defrosting food is treated to ensure that medium solution 8 surrounds completely.In batch course of defrosting, radio frequency can be directly opened
Heater door, pre-packaged frozen food is put at tunnel upper opening, opens radio heater, complete to open until thawing
Door takes out sample.
In continous way course of defrosting, as shown in figure 3, setting tunnel type media Containers 5, the tunnel in radio heater 1
Road formula media Containers 5 are arranged on bottom electrode plate 3, conveyer belt are set in the media Containers 5, to be thawed is of different shapes
Food can be put into media Containers 5 through the opening of one end of media Containers 5, and is delivered to radio frequency heating region by conveyer belt 9 and is entered
Row thaws, and waits to thaw and completes, and food is delivered to the other end of media Containers 5 by conveyer belt 9, and take out to thaw from opening and complete
Food.
Another embodiment that continous way is thawed, as shown in figure 4, setting biography above bottom electrode plate 3 in radio heater 1
Band 9 is sent, multiple media Containers 5 are set on the conveyer belt 9, medium solution 8 is full of in container 5, waits to solve by of different shapes
Jelly food is respectively put into the media Containers 5 of the one end of conveyer belt 9, and communicated band 9 is delivered to radio frequency heating region and thawed, and treats
Thaw and complete, media Containers 5 are delivered to the other end of conveyer belt 9 by conveyer belt 9, take out the food for thawing and completing, medium holds
Device 5 and medium solution 8 can be recycled.
Operation principle：Medium solution is arranged to ethanol solution, and ethanol is polar solvent, the dielectric loss in radio frequency band
It is extremely low, substantially not by radio frequency Wave heating.Ethanol solution freezing point more than 40% concentration is below -30 DEG C, therefore in conventional food
It is still liquid when near -20 DEG C of cryogenic temperature, there is the contact good with treating defrosting food.In course of defrosting, ethanol
Solution has completely cut off air and frozen food well, reduces corner energy concentration effect, and cold ethanol solution can absorb
Edge crosses complementary energy, further by thaw point distribution uniformity.Teflon and polypropylene material have foodsafety,
Easy to clean and dielectric loss is small, will not be by radio frequency Wave heating.
Application Example
It is 285*190*80mm with size3Cuboid polypropylene box, temperature is inside poured into as -30 DEG C, concentration is 60%
Ethanol solution.By a block-shaped irregular 1.5kg or so fresh beef, be frozen in -30 DEG C of refrigerators more than 24 hours until
Sample integrally all reaches -30 DEG C.The beef freezed is vacuum-packed with polypropylene screen, and is put into ethanol solution.By box
It is put into SairemLabotronIn parallel plate electrode formula radio heater, adjustment pole plate spacing is 115mm.Heat time sets
For 5 minutes, after heating terminates, stop radio heater immediately, beef sample is taken out, remove packaging, move to FLIR rapidly
The temperature collection of illustrative plates shooting on surface, section is carried out under SC60 thermal infrared imagers.With under same radio frequency thawing condition without using the present invention
The method of proposition, the beef sample for directly carrying out radio frequency defrosting are contrasted.Before application the inventive method, defrosting sample is not
Uniformity coefficient is ± 11 DEG C, and ± 3 DEG C of are promoted to using degree of irregularity after this method
Although above by referring to specific embodiment, invention has been described, and one of ordinary skill in the art should
Work as understanding, in principle disclosed by the invention and scope, configuration disclosed by the invention can be directed to and details makes many modifications.
For example, although this specification describes defreezing method by taking food as an example, the defreezing method obviously can also remove suitable for defrosting
Other freezing objects outside food.Protection scope of the present invention is determined by appended claim, and claim is anticipated
Whole modifications that the equivalent literal meaning of technical characteristic or scope are included in claim is covered.
Claims (10)
- A kind of 1. radio frequency heating apparatus uniformly to thaw, it is characterised in that：Including radio heater and media Containers；The radio frequency Heater includes radio-frequency signal generator, electric pole plate and bottom electrode plate, and the media Containers are arranged on the electric pole plate and described Between bottom electrode plate, the media Containers are built with medium solution, for that will treat that unfrozen object immerses the medium when thawing Hold in liquid and thawed together through radio heater.
- 2. a kind of radio frequency heating apparatus uniformly to thaw as claimed in claim 1, it is characterised in that liquid medium solution is solidifying Solid point is below -20 DEG C, low toxicity, and during radio frequency heating heating rate less than treating unfrozen object heating rate.
- 3. a kind of radio frequency heating apparatus uniformly to thaw as claimed in claim 2, it is characterised in that the medium solution is second Alcoholic solution.
- 4. a kind of radio frequency heating apparatus uniformly to thaw as claimed in claim 4, it is characterised in that the media Containers is not Easily it is made by the material of radio frequency heating.
- 5. a kind of radio frequency heating apparatus uniformly to thaw as claimed in claim 4, it is characterised in that described to be not easy to be added by radio frequency The material of heat includes Teflon or polypropylene.
- 6. a kind of radio frequency heating apparatus uniformly to thaw as claimed in claim 5, it is characterised in that the ethanol solution is solving Temperature setting before jelly is with treating that unfrozen object temperature approaches.
- A kind of 7. radio frequency heating apparatus uniformly to thaw as claimed in claim 6, it is characterised in that also including heat exchanger, The media Containers are connected with the heat exchanger so that the medium solution carries out temperature control circulation by heat exchanger.
- 8. a kind of radio frequency heating apparatus uniformly to thaw as claimed in claim 7, it is characterised in that the heat exchanger also wraps Temperature feedback system is included, the temperature feedback system is used to detect the temperature of the medium solution and feeds back to the heat exchange Device, the temperature of heat exchanger medium solution according to the feedback control of the temperature feedback system.
- 9. a kind of radio frequency heating apparatus uniformly to thaw as claimed in claim 7, it is characterised in that in the media Containers also It is provided with liquid level sensor.
- 10. a kind of radio frequency heating apparatus uniformly to thaw as described in one of claim 1-7, it is characterised in that be additionally provided with Conveyer belt, for by between the electric pole plate of object continuous conveying to radio heater and bottom electrode plate.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812218.0A CN107373296A (en) | 2017-09-11 | 2017-09-11 | A kind of radio frequency heating apparatus uniformly to thaw |
| PCT/CN2018/103785 WO2019047800A1 (en) | 2017-09-11 | 2018-09-03 | Radio-frequency heating method and radio-frequency heating device |
| US16/804,363 US11751297B2 (en) | 2017-09-11 | 2020-02-28 | Radio frequency heating method and radio frequency heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812218.0A CN107373296A (en) | 2017-09-11 | 2017-09-11 | A kind of radio frequency heating apparatus uniformly to thaw |
Publications (1)
| Publication Number | Publication Date |
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| CN107373296A true CN107373296A (en) | 2017-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710812218.0A Pending CN107373296A (en) | 2017-09-11 | 2017-09-11 | A kind of radio frequency heating apparatus uniformly to thaw |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108924982A (en) * | 2017-12-20 | 2018-11-30 | 恩智浦美国有限公司 | Thawing equipment and its operating method |
| WO2019047800A1 (en) * | 2017-09-11 | 2019-03-14 | 上海海洋大学 | Radio-frequency heating method and radio-frequency heating device |
| US10917948B2 (en) | 2017-11-07 | 2021-02-09 | Nxp Usa, Inc. | Apparatus and methods for defrosting operations in an RF heating system |
| US10917065B2 (en) | 2017-11-17 | 2021-02-09 | Nxp Usa, Inc. | RF heating system with phase detection for impedance network tuning |
| US10952289B2 (en) | 2018-09-10 | 2021-03-16 | Nxp Usa, Inc. | Defrosting apparatus with mass estimation and methods of operation thereof |
| US11039511B2 (en) | 2018-12-21 | 2021-06-15 | Nxp Usa, Inc. | Defrosting apparatus with two-factor mass estimation and methods of operation thereof |
| US11039512B2 (en) | 2016-08-05 | 2021-06-15 | Nxp Usa, Inc. | Defrosting apparatus with lumped inductive matching network and methods of operation thereof |
| CN113048706A (en) * | 2019-12-26 | 2021-06-29 | 青岛海尔电冰箱有限公司 | Thawing apparatus and refrigerator |
| US11166352B2 (en) | 2018-12-19 | 2021-11-02 | Nxp Usa, Inc. | Method for performing a defrosting operation using a defrosting apparatus |
| CN114885977A (en) * | 2022-05-25 | 2022-08-12 | 江苏经贸职业技术学院 | Beef thawing device capable of reducing water loss rate and thawing process thereof |
| EP4007452A4 (en) * | 2019-08-27 | 2022-09-07 | Dotwil Intelligent Technology Co., Ltd. | Distributed radio frequency or microwave thawing device |
| US11570857B2 (en) | 2018-03-29 | 2023-01-31 | Nxp Usa, Inc. | Thermal increase system and methods of operation thereof |
| US11632829B2 (en) | 2016-08-05 | 2023-04-18 | Nxp Usa, Inc. | Apparatus and methods for detecting defrosting operation completion |
| US11800608B2 (en) | 2018-09-14 | 2023-10-24 | Nxp Usa, Inc. | Defrosting apparatus with arc detection and methods of operation thereof |
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| JPS58101671A (en) * | 1981-12-14 | 1983-06-16 | Hitachi Heating Appliance Co Ltd | Cooled state detector |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11039512B2 (en) | 2016-08-05 | 2021-06-15 | Nxp Usa, Inc. | Defrosting apparatus with lumped inductive matching network and methods of operation thereof |
| US11632829B2 (en) | 2016-08-05 | 2023-04-18 | Nxp Usa, Inc. | Apparatus and methods for detecting defrosting operation completion |
| WO2019047800A1 (en) * | 2017-09-11 | 2019-03-14 | 上海海洋大学 | Radio-frequency heating method and radio-frequency heating device |
| US11751297B2 (en) | 2017-09-11 | 2023-09-05 | Shanghai Ocean University | Radio frequency heating method and radio frequency heating device |
| US10917948B2 (en) | 2017-11-07 | 2021-02-09 | Nxp Usa, Inc. | Apparatus and methods for defrosting operations in an RF heating system |
| US10917065B2 (en) | 2017-11-17 | 2021-02-09 | Nxp Usa, Inc. | RF heating system with phase detection for impedance network tuning |
| US11382190B2 (en) | 2017-12-20 | 2022-07-05 | Nxp Usa, Inc. | Defrosting apparatus and methods of operation thereof |
| CN108924982A (en) * | 2017-12-20 | 2018-11-30 | 恩智浦美国有限公司 | Thawing equipment and its operating method |
| US11570857B2 (en) | 2018-03-29 | 2023-01-31 | Nxp Usa, Inc. | Thermal increase system and methods of operation thereof |
| US10952289B2 (en) | 2018-09-10 | 2021-03-16 | Nxp Usa, Inc. | Defrosting apparatus with mass estimation and methods of operation thereof |
| US11800608B2 (en) | 2018-09-14 | 2023-10-24 | Nxp Usa, Inc. | Defrosting apparatus with arc detection and methods of operation thereof |
| US11166352B2 (en) | 2018-12-19 | 2021-11-02 | Nxp Usa, Inc. | Method for performing a defrosting operation using a defrosting apparatus |
| US11039511B2 (en) | 2018-12-21 | 2021-06-15 | Nxp Usa, Inc. | Defrosting apparatus with two-factor mass estimation and methods of operation thereof |
| EP4007452A4 (en) * | 2019-08-27 | 2022-09-07 | Dotwil Intelligent Technology Co., Ltd. | Distributed radio frequency or microwave thawing device |
| CN113048706A (en) * | 2019-12-26 | 2021-06-29 | 青岛海尔电冰箱有限公司 | Thawing apparatus and refrigerator |
| CN114885977A (en) * | 2022-05-25 | 2022-08-12 | 江苏经贸职业技术学院 | Beef thawing device capable of reducing water loss rate and thawing process thereof |
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