CN108322953B - Microwave inhibition plate - Google Patents
Microwave inhibition plate Download PDFInfo
- Publication number
- CN108322953B CN108322953B CN201810190530.5A CN201810190530A CN108322953B CN 108322953 B CN108322953 B CN 108322953B CN 201810190530 A CN201810190530 A CN 201810190530A CN 108322953 B CN108322953 B CN 108322953B
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- China
- Prior art keywords
- microwave
- inhibition
- area
- suppression
- reflection area
- Prior art date
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- 230000005764 inhibitory process Effects 0.000 title claims abstract description 45
- 230000001629 suppression Effects 0.000 claims abstract description 42
- 238000010521 absorption reaction Methods 0.000 claims abstract description 25
- 239000004744 fabric Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 239000011358 absorbing material Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims 2
- 238000010009 beating Methods 0.000 claims 1
- 238000005253 cladding Methods 0.000 claims 1
- 239000003112 inhibitor Substances 0.000 description 6
- 239000010426 asphalt Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 235000021067 refined food Nutrition 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- H05B6/64—Heating using microwaves
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Cookers (AREA)
Abstract
The invention discloses a microwave inhibition plate, which belongs to the technical field of industrial microwave equipment and structurally comprises a reflection area and an absorption area positioned at the rear side of the reflection area, wherein the reflection area consists of a plurality of inhibition blocks, the absorption area consists of inhibition sheets, and the reflection area is positioned at one end close to a microwave generation source. Compared with the prior art, the microwave suppression plate has the characteristics of reasonable design, simple structure, easiness in processing, small volume, convenience in use and the like.
Description
Technical Field
The invention relates to industrial microwave equipment, in particular to a microwave suppression plate.
Background
In industry, a plurality of box-type microwave heaters are often connected in series to form tunnel microwave heating equipment, and inlets and outlets for materials are arranged at two ends of the equipment, so that the sizes of the inlets and outlets are often larger due to high-efficiency industrial production, and the contradiction between the sizes of the inlets and outlets and the leakage of microwave energy is generated. In industrial microwave devices, limiting microwave leakage is a critical link. The industrial microwave leakage amount of the microwave oven specified in China is that the microwave power is less than or equal to 1Mw/cm 2 (915 MHz) at the position 5 cm away from equipment.
The method has the defects that only a few high-order modes are suppressed, the leakage prevention capability is poor and the size is huge.
There are many methods of suppressing microwave leakage, and they can be classified into reactive leakage suppressors, resistive leakage suppressors and shielded leakage suppressors according to various principles. The reactive energy leakage inhibitor is provided with a comb plate type inhibitor, a 1/4 wavelength wave guide groove type inhibitor and the like according to the shape of the inhibitor; resistive energy leakage suppressors are based on absorbent material such as angular pile foam, silicone rubber material, liquid water, and the like. The shielding energy leakage inhibitor is provided with a microwave oven door, a microwave-proof curtain door and other inhibitors.
The food industry requires that processed food materials not be contaminated by the drying process, and therefore, there is a greater need for the inhibition of microwave energy leakage.
Disclosure of Invention
Aiming at the defects, the technical task of the invention is to provide the microwave suppression plate which has simple structure, low production cost and good microwave leakage absorption effect.
The technical scheme adopted for solving the technical problems is as follows: the microwave suppressing board includes one reflecting area and one absorbing area in the back side of the reflecting area, the reflecting area consists of several suppressing blocks, the absorbing area consists of suppressing sheets and the reflecting area is located in one end near the microwave generating source.
Further, it is preferable that a protection area is provided on the rear side of the absorption area, and the protection area is composed of a suppression block.
Further, it is preferable that a buffer region is arranged between the reflection region and the absorption region, and the buffer region is composed of a front end suppression sheet and a rear end suppression sheet.
Further, it is preferable that the width of the suppression block of the reflection region is decreased with an increase in distance from the microwave generation source.
Further, it is preferable that the width of the suppressing block of the reflection area is 50 to 150mm.
Further, it is preferable that the suppressing piece is formed by bending a metal plate, and the suppressing piece is made of an absorbing material.
Further, the distance between the inhibition pieces is preferably 40mm.
Further, it is preferable that the distance between the inhibition block and the inhibition sheet is 10 to 50 mm.
Further, it is preferable that the material of the suppressing block is aluminum metal, and the absorbing material is made of graphite and asphalt.
Further, the outside of the microwave suppression plate is preferably covered with a dustproof cloth, and the dustproof cloth is a tetrafluoro cloth.
Compared with the prior art, the microwave suppression plate provided by the invention not only comprises a reactive energy leakage suppression part, but also comprises a resistive energy leakage suppression part, and the microwave of each secondary mode is comprehensively suppressed in a combined mode, so that the leakage prevention capability is good.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a microwave suppression plate.
Fig. 2 is a schematic structural diagram of a microwave suppression plate in embodiment 3.
Wherein:
1. A reflection region; 2. an absorption zone; 3. a protection zone; 4. a buffer.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
In the description of the present invention, it should be noted that the indicated orientation or positional relationship of the terms "front end", "rear end", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1:
The invention relates to a microwave suppression plate, which structurally comprises a reflection area 1 and an absorption area 2 positioned at the rear side of the reflection area 1, wherein the reflection area 1 is formed by a plurality of suppression blocks, the absorption area 2 is formed by suppression sheets, and the reflection area 1 is positioned at one end close to a microwave generation source. Further, the width of the inhibition block of the reflection area 1 is 50mm.
The inhibiting piece is formed by bending metal plates, and the inhibiting piece is made of an absorbing material.
Further, the distance between the inhibition pieces is preferably 40mm.
Further, the distance between the inhibition block and the inhibition sheet is preferably 10mm.
Further, the material of the inhibition block is aluminum metal, and the absorption material is made of graphite and asphalt. The outside of the microwave inhibition plate is coated with dustproof cloth, and the dustproof cloth is tetrafluoro cloth.
Example 2:
The invention relates to a microwave suppression plate, which structurally comprises a reflection area 1 and an absorption area 2 positioned at the rear side of the reflection area 1, wherein the reflection area 1 is formed by a plurality of suppression blocks, the absorption area 2 is formed by suppression sheets, and the reflection area 1 is positioned at one end close to a microwave generation source. The width of the suppression block of the reflection area 1 decreases with increasing distance from the microwave generating source.
Further, the width of the inhibition block of the reflection area is 150mm.
Further, it is preferable that the suppressing piece is formed by bending a metal plate, and the suppressing piece is made of an absorbing material.
Further, the distance between the inhibition pieces is preferably 40mm.
It is known from electromagnetic field radiation theory that when the passage of wall current is cut off (e.g., a slot or opening in the waveguide, or an imprecise seam around the heater housing, etc.), energy within the waveguide is caused to radiate outwardly. With this feature, slots or openings are often formed in the waveguide wall in appropriate locations to achieve microwave energy excitation or coupling of the susceptors. For each particular mode, a set of short-circuit wave guide slots (anti-flow tabs, posts) are added to the broadside of the port, which are 1/4 the wavelength of that mode, to allow the microwave energy propagation to assume an open state. For a 1/4 long waveguide slot suppressor, the transmission mode and its cutoff wavelength should be determined first:
From the waveguide transmission theory, only TE wave and TM wave exist in the waveguide, and the TEmn respective TMmn mode cut-off wavelengths of the empty rectangular waveguide are solved by the formula (1): λe=2-
Wherein: a-width of the cross-sectional dimension of the input and output ports; b-height of cross-sectional dimensions of the input and output ports.
Further calculating waveguide wavelength of each mode capable of being transmitted in the input channel and the output channel according to the formula
The solving formula of λgmn is: lambdagmn=λ0
Since the microwave drying equipment we are experimental in general prepared with a frequency of 2450MHz, the solution in the equation is calculated from equation (1): λ0=c/¦
Where c=3×10 8 m/s, λ 0 =c/f= 122.4mm;
Taking the existing production equipment as an example, calculating the corresponding wavelength value and the cutoff wavelength of each mode in the waveguide, wherein the width a=410 mm and the height b=120 mm of the cross section dimensions of the input and output ports of the equipment. Since the channels are often filled with partial material in practical applications, the resulting estimated data should be corrected appropriately. For simplicity of analysis, a null waveguide approximation process is performed.
If the waveguide grooves with different waveguide wavelengths lambdag and a series of lambdag/4 depths are limited, different modes can be attenuated, the effect of inhibiting energy leakage is achieved, but according to the actual input and output port conditions of the device, only the waveguide groove smaller than 40mm can be selected.
Further, it is preferable that the distance between the inhibition block and the inhibition sheet is 50 mm.
Further, the material of the inhibition block is aluminum metal, and the absorption material is made of graphite and asphalt. The outside of the microwave inhibition plate is coated with dustproof cloth, and the dustproof cloth is tetrafluoro cloth.
Example 3:
The invention relates to a microwave suppression plate, which structurally comprises a reflection area 1 and an absorption area 2 positioned at the rear side of the reflection area 1, wherein the reflection area 1 is formed by a plurality of suppression blocks, the absorption area 2 is formed by suppression sheets, and the reflection area 1 is positioned at one end close to a microwave generation source. The width of the suppression block of the reflection area 1 decreases with increasing distance from the microwave generating source. In order to further enhance the microwave suppression effect, a buffer zone 4 is disposed between the reflection zone 1 and the absorption zone 2, and the buffer zone 4 is composed of a suppression sheet at the front end and a suppression block at the rear end.
Further, the width of the inhibition block of the reflection area is 100mm.
Further, it is preferable that the suppressing piece is formed by bending a metal plate, and the suppressing piece is made of an absorbing material.
Further, the distance between the inhibition pieces is preferably 40mm.
Further, the distance between the inhibition block and the inhibition sheet is preferably 30 mm.
Further, the material of the inhibition block is aluminum metal, and the absorption material is made of graphite and asphalt. The outside of the microwave inhibition plate is coated with dustproof cloth, and the dustproof cloth is tetrafluoro cloth.
Example 4:
The invention relates to a microwave suppression plate, which structurally comprises a reflection area 1 and an absorption area 2 positioned at the rear side of the reflection area 1, wherein the reflection area 1 is formed by a plurality of suppression blocks, the absorption area 2 is formed by suppression sheets, and the reflection area 1 is positioned at one end close to a microwave generation source. The width of the suppression block of the reflection area 1 decreases with increasing distance from the microwave generating source. In order to further enhance the microwave suppression effect, a buffer zone 4 is disposed between the reflection zone 1 and the absorption zone 2, and the buffer zone 4 is composed of a suppression sheet at the front end and a suppression block at the rear end. The rear side of the absorption zone 2 is provided with a protection zone 3, and the protection zone 3 consists of a suppression block.
Further, the width of the inhibition block of the reflection area is 100mm.
Further, it is preferable that the suppressing piece is formed by bending a metal plate, and the suppressing piece is made of an absorbing material.
Further, the distance between the inhibition pieces is preferably 40mm.
Further, the distance between the inhibition block and the inhibition sheet is preferably 30 mm.
Further, the material of the inhibition block is aluminum metal, and the absorption material is made of graphite and asphalt. The outside of the microwave inhibition plate is coated with dustproof cloth, and the dustproof cloth is tetrafluoro cloth.
The ML-91 microwave leakage energy tester is used for detection, the leakage threshold value specified by the country is set to be 1Mw/cm 2 in the ML-91 microwave leakage energy tester, at the moment, the microwave source of the microwave production line is fully opened to a high fire level, and the distance between measuring equipment and a port is less than or equal to 5cm during measurement. The leakage quantity of the microwave production line is monitored in real time by using a detection instrument, and the leakage quantity meets the national regulation standard.
The present invention can be easily implemented by those skilled in the art through the above specific embodiments. It should be understood that the invention is not limited to the particular embodiments described above. Based on the disclosed embodiments, a person skilled in the art may combine different technical features at will, so as to implement different technical solutions.
Claims (4)
1. The utility model provides a microwave inhibition board which characterized in that includes reflection area and the absorption area that is located the reflection area rear side, the reflection area be a plurality of inhibition pieces and constitute, the absorption area constitute by the inhibition piece, the reflection area be located the one end that is close to the microwave generation source, the rear side of absorption area be provided with the protection area, the protection area constitute by the inhibition piece, reflection area and absorption area between be provided with the buffer zone, the buffer zone constitute by the inhibition piece of front end and the inhibition piece of rear end, the inhibition piece of reflection area the width of inhibition piece decrease along with the increase of distance from the microwave generation source, the inhibition piece be the panel beating bending and form, the inhibition piece be made by absorbing material, the material of inhibition piece be aluminum metal, absorbing material be made by graphite and pitch, the outside cladding of microwave inhibition board have dust cloth, dust cloth be the tetrafluorocloth.
2. A microwave suppression plate according to claim 1, wherein the width of the suppression block of the reflective area is 50-150mm.
3. A microwave suppression sheet according to claim 1, wherein the distance between the suppression sheets is 40mm.
4. A microwave suppression sheet as recited in claim 1 wherein the distance between the suppression block and the suppression sheet is between 10 and 50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810190530.5A CN108322953B (en) | 2018-03-08 | 2018-03-08 | Microwave inhibition plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810190530.5A CN108322953B (en) | 2018-03-08 | 2018-03-08 | Microwave inhibition plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108322953A CN108322953A (en) | 2018-07-24 |
| CN108322953B true CN108322953B (en) | 2024-06-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810190530.5A Active CN108322953B (en) | 2018-03-08 | 2018-03-08 | Microwave inhibition plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108322953B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113015280B (en) * | 2019-12-19 | 2022-12-02 | 江苏麦克威微波技术有限公司 | Microwave suppressor and microwave device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011003351A (en) * | 2009-06-17 | 2011-01-06 | Takasago Ind Co Ltd | Microwave leakage control member, and hybrid type heating furnace |
| CN202282884U (en) * | 2011-11-08 | 2012-06-20 | 湖南顶立科技有限公司 | Tunnel type microwave heating equipment and energy-leaking suppressor thereof |
| CN102816623A (en) * | 2012-08-14 | 2012-12-12 | 南京三乐微波技术发展有限公司 | Coal quality improvement apparatus for microwave low temperature dehydration and desulfurization |
| CN207939780U (en) * | 2018-03-08 | 2018-10-02 | 山东立威微波设备有限公司 | A kind of microwave suppressing plate |
-
2018
- 2018-03-08 CN CN201810190530.5A patent/CN108322953B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011003351A (en) * | 2009-06-17 | 2011-01-06 | Takasago Ind Co Ltd | Microwave leakage control member, and hybrid type heating furnace |
| CN202282884U (en) * | 2011-11-08 | 2012-06-20 | 湖南顶立科技有限公司 | Tunnel type microwave heating equipment and energy-leaking suppressor thereof |
| CN102816623A (en) * | 2012-08-14 | 2012-12-12 | 南京三乐微波技术发展有限公司 | Coal quality improvement apparatus for microwave low temperature dehydration and desulfurization |
| CN207939780U (en) * | 2018-03-08 | 2018-10-02 | 山东立威微波设备有限公司 | A kind of microwave suppressing plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108322953A (en) | 2018-07-24 |
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