CN110006077A - The method for improving micro-wave oven heating uniformity by lasting adjusting reflection line position - Google Patents
The method for improving micro-wave oven heating uniformity by lasting adjusting reflection line position Download PDFInfo
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- CN110006077A CN110006077A CN201910368080.9A CN201910368080A CN110006077A CN 110006077 A CN110006077 A CN 110006077A CN 201910368080 A CN201910368080 A CN 201910368080A CN 110006077 A CN110006077 A CN 110006077A
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- microwave
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- wave oven
- line position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/22—Reflectors for radiation heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/02—Stoves or ranges heated by electric energy using microwaves
-
- 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
- H05B6/64—Heating using microwaves
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Electric Ovens (AREA)
Abstract
The invention belongs to micro-wave oven control technology fields, disclose a kind of method that micro-wave oven heating uniformity is improved by lasting adjusting reflection line position, either vertically or horizontally the glass window or plastic window of a fixed transparent microwave are installed in direction in micro-wave oven, the cavity that one depth is less than 20mm is set behind glass window or plastic window, moveable metal mirror is arranged in cavity bottom, the shift position of metal mirror is adjusted by intelligence control system, lasting reciprocating motion, or the movement or static in a certain position in a certain section.The present invention solves the non-uniform problem of microwave heating from principle, improves the uniformity of microwave heating；The present invention does not change the size of cooking cavity, easy to operate, can additionally combine with existing metallic rotator and turntable, reach better heating uniformity.
Description
Technical field
The invention belongs to micro-wave oven control technology field, more particularly to one kind are micro- by persistently adjusting reflection line position raising
The method of wave stove heating uniformity.
Background technique
Currently, the immediate prior art:
With the development of society, allegro life style leads to gradually changing for consumer spending habit, people other side
Just the demand of food increasingly increases.Many consumers get used to eating again after heating food.Household microwave oven is quickly square because of it
Just heating method and be widely used, be increasingly becoming the most important method of reheating.Although micro-wave oven heating speed is fast,
It is to form standing wave in the cavity due to microwave to cause electric field in spatial distribution and uneven, and then cause heating uneven.Furthermore
Field distribution in micro-wave oven will receive the influence of material, size and shape with food.In order to avoid because hot-spot is in
Explosion caused by portion's pressure rise must reduce power and extend heating time in heating food, especially packaged food.It is logical
It often needs to be stirred after heating a period of time or turn-over is to promote the uniformity heated.Heating → stirring → reheating mistake
Cheng Zaocheng is inconvenient for use.
Existing household microwave oven improves there are two ways to heating uniformity: rotating disc type microwave oven persistently changes the position of food
It sets；Flat plate microwave oven has added rotor below top or plate, persistently changes the phase of microwave by rotor.Both sides
The essence of formula is all the relative position by changing food and electric field, makes distribution of the microwave in heating chamber chaotic as far as possible,
It allows food to undergo different microwave field strengths everywhere, to make the different parts of food by the microwave radiation of equal probabilities, reaches
To the purpose of the uniformity of improved microwave heating.Although the micro-wave oven of two kinds of working methods improves the uniformity of heating,
It is actual effect and unsatisfactory.Because both modes are without fundamentally solving to lead to the non-uniform original of microwave heating
Because: non-uniform electric caused by standing wave.
In conclusion problem of the existing technology is:
(1) in the prior art, without fundamentally solving the problems, such as that microwave heating is non-uniform, do not change caused by standing wave
Non-uniform electric problem causes the uniformity of microwave heating poor.
(2) in addition, either Flat-plate microwave oven or turntable micro-wave oven, food is all placed in the bottom of micro-wave oven, close
Bottom metal reflecting surface, this will lead to bottom-heated too fast (microwave source is at bottom) or underheat, and (microwave source is on top
When).The heating uniformity of food in a thickness direction also receives limitation, can solve this in microwave furnace bottom setting reflecting surface and asks
Topic.
(3) design of existing household microwave oven is in order to meet widely heating application, but for different food
Its rate heated and uniformity are all different.Therefore optimal heating effect is all unable to reach for each food.
Solve the difficulty of above-mentioned technical problem: household microwave oven has been widely applied, and current solution is in turntable
Except rotor, increase fixed multiple random scatters faces on micro-wave oven inner wall, principle still increases the mixed of microwave
Random degree, but effect is limited.Because micro-wave oven is once be formed, microwave heating chamber size is just secured, the height position of food
It sets and also secures.Therefore change of its heating effect only by food and microwave relative position, limitation.
Solve the meaning of above-mentioned technical problem: by adjusting bottom or offside reflection face position, thus it is possible to vary microwave exists
Standing wave position in heating chamber, improves the uniformity of heating.In addition, the position of reflecting surface can be designed for different food,
Most suitable microwave heating chamber is designed for it, realizes the general and dedicated perfect combination of micro-wave oven.
Solve the problems, such as that the reheating of instant food has important application value, such as: it is installed on automatic vending machine
Quick and uniform special microwave oven is heated, the edible problem of instant food can be greatly improved, improve the automation journey of heating
Degree.The quasi- reflection line position by changing microwave of the present invention, changes the phase of standing wave to improve the uniformity of microwave heating.
Summary of the invention
In view of the problems of the existing technology, the present invention provides one kind improves microwave by persistently adjusting reflection line position
The method of stove heating uniformity.
The invention is realized in this way a kind of side for improving micro-wave oven heating uniformity by lasting adjusting reflection line position
Method, it is described to include: by persistently adjusting the method that reflection line position improves micro-wave oven heating uniformity
Either vertically or horizontally the glass window or plastics of a fixed transparent microwave are installed in direction in micro-wave oven
Window, is arranged the cavity that a depth is less than 20mm behind glass window or plastic window, and cavity bottom setting is removable
Metal mirror, the shift position of metal mirror adjusts small-power servo motor by intelligence control system, and lasting is past
Multiple movement, or the movement or static in a certain position in a certain section；
Under the premise of keeping microwave cooking chamber size constant, the standing wave position of microwave is adjusted, it is uniform to improve microwave heating
Property.
Further, metal mirror area and glass window or plastic window area equation.
Further, the standing wave wavelength of change is 0-30mm, is realized from node to trough, the movement of heating cold spot to hot spot.
Further, the shift position distance of metal mirror are as follows: 0~20mm.
Another object of the present invention, which is to provide, to be improved micro-wave oven by persistently adjusting reflection line position described in a kind of implementation and adds
The method of thermal uniformity improves micro-wave oven heating uniformity device by persistently adjusting reflection line position, described by persistently adjusting
The device setting that section reflection line position improves micro-wave oven heating uniformity is applicable to microwave oven cavity of different shapes；
The inside of microwave oven cavity is shelved with cooking plate；Microwave oven cavity bottom is equipped with telescopic device；On telescopic device
Metallic reflection plate is installed；The bottom or side metallic reflection plate that metallic reflection plate is mounted on microwave oven cavity is bonded with cooking plate
Or separation；
Microwave feed-in mouth is offered on microwave oven cavity.
Further, microwave oven cavity is cylindrical or rectangle；
The microwave feed-in mouth of rectangle microwave furnace cavity is mounted at the top of microwave oven cavity or side, then metal mirror device
In on the face for being different from feed-in mouth；
The microwave feed-in mouth of cylindrical microwave furnace cavity is mounted at the top of cylindrical microwave furnace cavity, then metal mirror is set
It is placed in cavity bottom.
In conclusion advantages of the present invention and good effect are as follows:
The present invention provides another resolving ideas for improving microwave heating uniformity, are mainly technically characterized by micro-wave oven
Under the premise of cooking cavity size constancy, by the lasting position for changing microwave reflection face, and then constantly changes the phase of standing wave, mention
The uniformity of height heating.
Advantage of the present invention is also:
The present invention solves the non-uniform problem of microwave heating from principle, improves the uniformity of microwave heating.
The present invention does not change the size of cooking cavity, easy to operate, additionally can be with existing metallic rotator and turntable phase
In conjunction with having reached better heating uniformity.Such as on existing right side be microwave feed-in mouth, bottom adds in the micro-wave oven of turntable,
(i.e. the opposite of microwave feed-in mouth) increases the reflecting surface of sustainable adjusting to the left, and the knot of the device and turntable may be implemented
It closes, similarly, the device can also be increased in the microwave heating chamber of metallic rotator.
Reflection line position of the present invention can be set to continue adjusting, may be set to be and fixes in a certain position, therefore needle
Different location procedures can be set to specific product, so that micro-wave oven customizes the individual of different food products, change existing micro-
Wave furnace realizes the optimal heating to different product to the adaptability of different food products.
By taking cylindrical bottom reflects as an example, in the reflecting surface mobile space of cavity bottom setting 20mm, put on a glass
The food of high 40mm is set, when reflecting surface height is 0,10,20mm, field distribution of the chamber central position on height and position is as schemed
4.This Figure illustrates variation of the electric field strength in microwave cavity short transverse.
It can be seen that electric field strength reduces after microwave enters food, reflecting surface is in different location, food product standing wave
Phase it is different.Food product electric-field intensity distribution such as Fig. 5.This Figure illustrates reflectings surface in different location, food product electricity
The variation of field intensity in a thickness direction, electric field strength height represent the height of the rate of heat addition.
It can be seen that antinode and node position of the reflection line position at 0mm and 20mm are exactly the opposite, that heats is cold and hot
Point position be it is complementary, the phase of reflection line position standing wave 10mm between this two, therefore pass through reflecting surface it is past
Polyphony section can improve the uniformity of heating.
Detailed description of the invention
Fig. 1 is the dress provided in an embodiment of the present invention that micro-wave oven heating uniformity is improved by lasting adjusting reflection line position
Set middle cylindrical bottom portion reflecting surface microwave oven cavity schematic diagram.
Fig. 2 is the dress provided in an embodiment of the present invention that micro-wave oven heating uniformity is improved by lasting adjusting reflection line position
Away from shape offside reflection face microwave oven cavity schematic diagram in setting.
Fig. 3 is the dress provided in an embodiment of the present invention that micro-wave oven heating uniformity is improved by lasting adjusting reflection line position
Away from shape bottom reflection face microwave oven cavity schematic diagram in setting.
In figure: 1, microwave oven cavity；2, cooking plate；3, metallic reflection plate；4, telescopic device；5, microwave feed-in mouth.
Fig. 4 is provided in an embodiment of the present invention so that cylindrical bottom reflects as an example, in the reflection of cavity bottom setting 20mm
Face mobile space places the food of high 40mm on a glass, and when reflecting surface height is 0,10,20mm, chamber central position exists
Height and position figure.
Fig. 5 is that the electric field strength provided in an embodiment of the present invention after microwave enters food reduces, and reflecting surface is in different location
When, the phase of food product standing wave is different.Food product electric-field intensity distribution figure.
Fig. 6 is provided in an embodiment of the present invention for cylindricity wave chamber, diameter 190mm, whole height 180mm,
Middle reflecting surface mobile cavity is 20mm, and food is diameter 140mm, and the circular foods of high 40mm, dielectric constant is set as 54, perpendicular
Histogram is upward, the distribution map of the electric field of round position.
Fig. 7 is the high diameter 190mm high 180mm of cylindrical microwave furnace provided in an embodiment of the present invention wherein cooking cavity 160mm,
Reflecting surface moving distance 20mm, microwave source is at the top of cavity.Heating diameter is 140mm, and the food of high 40mm, reflecting surface is in 0mm
With the electric field strength longitudal section figure at 20mm.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
In the prior art, it does not solve the problems, such as that microwave heating is non-uniform, does not change field distribution caused by standing wave not
Uniformity problem.Cause the uniformity of microwave heating poor.
To solve the above problems, below with reference to concrete scheme, the invention will be further described.
The method provided in an embodiment of the present invention that micro-wave oven heating uniformity is improved by lasting adjusting reflection line position, packet
It includes:
Either vertically or horizontally the glass window or plastics of a fixed transparent microwave are installed in direction in micro-wave oven
Window, is arranged the cavity that a depth is less than 20mm behind glass window or plastic window, and cavity bottom setting is removable
Metal mirror, the shift position of metal mirror adjusted by intelligence control system, lasting reciprocating motion, or a certain
Movement or static in a certain position in section；
Under the premise of keeping microwave cooking chamber size constant, the standing wave position of microwave is adjusted, it is uniform to improve microwave heating
Property.
In embodiments of the present invention, metal mirror area and glass window or plastic window area equation.
In embodiments of the present invention, the standing wave position of change is 0-30mm.
In embodiments of the present invention, the shift position distance of metal mirror are as follows: 0~20mm.
As shown in Figure 1-Figure 3, the present invention provides a kind of by persistently adjusting reflection line position raising micro-wave oven homogeneous heating
The device of property is provided with microwave oven cavity 1 of different shapes；
The inside of microwave oven cavity is shelved with cooking plate 2；Microwave oven cavity bottom is equipped with telescopic device 4；Telescopic device
On metallic reflection plate 3 is installed；Metallic reflection plate is mounted on the bottom or side metallic reflection plate and cooking plate of microwave oven cavity
Fitting or separation；
Microwave feed-in mouth 5 is offered on microwave oven cavity.
Microwave oven cavity 1 is cylindrical or rectangle；
The microwave feed-in mouth 5 of rectangle microwave furnace cavity is mounted at the top of microwave oven cavity or side, then microwave reflection face is set
It sets in bottom or side on the other side；
The microwave feed-in mouth 5 of cylindrical microwave furnace cavity is mounted at the top of cylindrical microwave furnace cavity., then microwave reflection face
It is arranged in bottom.
Below with reference to working principle, the invention will be further described.
The microwave centre frequency of household microwave oven is 2450MHz, and wavelength is 122mm or so, and the standing wave wavelength of formation is
Its half, when it enters food, size reduction is that its is aerialεrFor the relative dielectric constant of food, value is general
It is direct in 40-70, thus microwave in the wavelength in food between 15-20mm, standing wave wavelength is between 7.5-10mm.Micro-
Either vertically or horizontally the glass window of a fixed transparent microwave is installed in direction in wave furnace, and a depth is arranged in face behind
A transportable metal mirror, metal mirror area and glass window is arranged in cavity less than 20mm, cavity bottom
It is equal, position by intelligence control system adjust, can continue reciprocating motion, can also be moved in a certain section or
It is static in a certain position.The setting is realized under the premise of keeping microwave cooking chamber size constant, and the standing wave position of microwave is adjusted,
Improve microwave heating uniformity.
As shown in Figure 1, Figure 2, Fig. 3 be three kinds using become size wave chamber technology micro-wave oven models, cooking plate glass or its
He makes the material of microwave, and purpose keeps apart food material and metallic reflection plate, prevents food material from polluting metal
Reflecting plate.The entire cooked plate of cavity is divided into the big chamber for containing food and the small storehouse chamber for adjusting resonant cavity size, work
When metallic reflection plate change standing wave mode is moved back and forth in small chamber, can also for certain food metal plate is locked in it is fixed
Position generates special standing wave mode.According to actual needs, microwave oven cavity may be designed to cylindrical or rectangle, metallic reflection plate
It may be alternatively mounted at bottom or side, microwave feed-in mouth is mountable at top or side (except circular cylindrical cavity).
Below with reference to using effect, the invention will be further described.
By taking cylindrical bottom reflects as an example, in the reflecting surface mobile space of cavity bottom setting 20mm, put on a glass
The food of high 40mm is set, when reflecting surface height is 0,10,20mm, field distribution of the chamber central position on height and position is as schemed
4。
It can be seen that electric field strength reduces after microwave enters food, reflecting surface is in different location, food product standing wave
Phase it is different.Food product electric-field intensity distribution such as Fig. 5.
It can be seen that antinode and node position of the reflection line position at 0mm and 20mm are exactly the opposite, that heats is cold and hot
Point position be it is complementary, the phase of reflection line position standing wave 10mm between this two, therefore pass through reflecting surface it is past
Polyphony section can improve the uniformity of heating.
Scheme works are described further below with reference to computer simulation.
For cylindricity wave chamber, diameter 190mm, whole height 180mm, wherein reflecting surface mobile cavity is 20mm, food
Product are diameter 140mm, and the circular foods of high 40mm, dielectric constant is set as 54, in the vertical direction, the electric field of round position
Distribution such as Fig. 6.
The high diameter 190mm high 180mm of cylindrical microwave furnace wherein cooking cavity 160mm, reflecting surface moving distance 20mm, microwave
Source is at the top of cavity.Heating diameter is 140mm, and the food of high 40mm, electric field strength of the reflecting surface at 0mm and 20mm be longitudinal sectional
Face such as Fig. 7.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of method for improving micro-wave oven heating uniformity by lasting adjusting reflection line position, which is characterized in that described logical
Crossing the method for persistently adjusting reflection line position raising micro-wave oven heating uniformity includes:
Either vertically or horizontally the glass window or plastic window of a fixed transparent microwave are installed in direction in micro-wave oven,
The cavity that one depth is less than 20mm is set behind glass window or plastic window, and moveable metal is arranged in cavity bottom
The shift position of reflecting surface, metal mirror is adjusted by intelligence control system, lasting reciprocating motion, or in a certain section
Movement is static in a certain position；
Under the premise of keeping microwave cooking chamber size constant, the standing wave position of microwave is adjusted, improves microwave heating uniformity.
2. the method as described in claim 1 for improving micro-wave oven heating uniformity by persistently adjusting reflection line position, special
Sign is, metal mirror area and glass window or plastic window area equation.
3. the method as described in claim 1 for improving micro-wave oven heating uniformity by persistently adjusting reflection line position, special
Sign is, the shift position distance of metal mirror are as follows: 0~20mm.
4. the method as described in claim 1 for improving micro-wave oven heating uniformity by persistently adjusting reflection line position, special
Sign is that the standing wave position of change is 0-30mm.
5. a kind of implement to improve the method for micro-wave oven heating uniformity by persistently adjusting reflection line position described in claim 1
The device of micro-wave oven heating uniformity is improved by lasting adjusting reflection line position, which is characterized in that described by persistently adjusting
The device that reflection line position improves micro-wave oven heating uniformity is provided with microwave oven cavity of different shapes；
The inside of microwave oven cavity is shelved with cooking plate；Microwave oven cavity bottom is equipped with telescopic device；It is installed on telescopic device
There is metallic reflection plate；The bottom or side metallic reflection plate that metallic reflection plate is mounted on microwave oven cavity is bonded or divides with cooking plate
From；
Microwave feed-in mouth is offered on microwave oven cavity.
6. the device as claimed in claim 5 for improving micro-wave oven heating uniformity by persistently adjusting reflection line position, special
Sign is that microwave oven cavity is cylindrical or rectangle；
In rectangle microwave furnace cavity, moveable metal mirror presents entrance side in the front of microwave feed-in mouth or in microwave
Face.
In cylindrical microwave furnace cavity, moveable metal mirror is at the top or bottom of cavity, depending on microwave feed-in mouth position
Set determination.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322642A (en) * | 2020-01-07 | 2020-06-23 | 四川大学 | Telescopic microwave oven based on optical transformation algorithm |
| CN112822809A (en) * | 2021-02-05 | 2021-05-18 | 四川大学锦城学院 | Microwave oven |
| CN114224190A (en) * | 2021-12-27 | 2022-03-25 | 无锡贝克威尔器具有限公司 | Baking tray capable of uniformly transferring heat |
| CN114709586A (en) * | 2022-04-07 | 2022-07-05 | 湖南大学 | Microwave resonant cavity capable of continuously translating electromagnetic field in microwave cavity and implementation method |
| CN114736029A (en) * | 2022-04-09 | 2022-07-12 | 上海财盈半导体股份有限公司 | Microwave focusing method ceramic welding device and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322642A (en) * | 2020-01-07 | 2020-06-23 | 四川大学 | Telescopic microwave oven based on optical transformation algorithm |
| CN112822809A (en) * | 2021-02-05 | 2021-05-18 | 四川大学锦城学院 | Microwave oven |
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| CN114709586A (en) * | 2022-04-07 | 2022-07-05 | 湖南大学 | Microwave resonant cavity capable of continuously translating electromagnetic field in microwave cavity and implementation method |
| CN114736029A (en) * | 2022-04-09 | 2022-07-12 | 上海财盈半导体股份有限公司 | Microwave focusing method ceramic welding device and method |
| CN114736029B (en) * | 2022-04-09 | 2024-04-12 | 上海财盈半导体股份有限公司 | Ceramic welding device and method by microwave focusing method |
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