CN103175242A - Microwave shield plate of microwave oven door - Google Patents
Microwave shield plate of microwave oven door Download PDFInfo
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- CN103175242A CN103175242A CN2013101365910A CN201310136591A CN103175242A CN 103175242 A CN103175242 A CN 103175242A CN 2013101365910 A CN2013101365910 A CN 2013101365910A CN 201310136591 A CN201310136591 A CN 201310136591A CN 103175242 A CN103175242 A CN 103175242A
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Abstract
The invention discloses a microwave shield plate of a microwave oven door, and belongs to the technical field of microwave shield. The microwave shield plate is mainly characterized in that the periphery of the shield plate has an opening structure, each opening is an arbitrary shape, the size of each opening is that the width of the opening is greater than 0.5 mm and is less than 10 mm, optimally, the width of the opening is greater than 1 mm and is less than 4 mm, the opening depth and opening distance are determined to ensure that a bulge between any two adjacent openings is in close contact with the edge of a metal oven hole or the small plane of the edge of the metal oven hole, and the depth of the openings in the periphery of the shield plate in the metal oven hole is smaller than 25mm. The microwave shield plate with the characteristics can effectively shield microwave to prevent microwave leakage, a shield effect can achieve an ambient level, the zero leakage is realized, and the microwave shield plate has the notable advantages of simple structure and low manufacturing cost. The microwave shield plate provided by the invention is widely used by household microwave ovens and microwave instruments for laboratories and microwave shield and leakage prevention of microwave equipment for industries.
Description
Technical field
The invention belongs to microwave and stop the shield technology field, specifically relate to a kind of micro-wave screening plate of door for microwave oven, this barricade can effectively prevent the microwave leakage in micro-wave oven.
Background technology
Microwave energy is described as " second flame of the mankind " as a kind of mode of heating of novel energy-conserving and environment-protective, more and more has been applied to the heating field, for example: food, papermaking, timber, sintering etc.The microwave that actual heating is used normally frequency is the electromagnetic wave of 915MHz and 2450MHz.The simple principle of heating using microwave is that the polarization of its alternating electromagnetic field is arranged the free charge of material internal again and the accent repeatedly of dipole revolves, thereby produce powerful vibration and friction, the Conversion of Energy of alternating electromagnetic field is the heat energy in medium in this microprocess, cause medium temperature to raise, so heating using microwave is dielectric material own loss energy of electromagnetic field and generating heat.Heating using microwave significantly is different from conventional heating, has following advantage: (1) belongs to interior heating, has not contact; (2) firing rate is fast; (3) efficiency of heating surface is high, can be significantly energy-conservation; (4) optionally add thermal material; (5) thermal inertia is little; (6) chemical reaction had catalytic action.
At present, microwave energy has been widely used in household microwave oven, use for laboratory microwave quasi-instrument and industrial microwave equipment.Microwave energy is in the ascendant in the application in high-temperature heating field, extremely wide in numerous high-technology field prospects such as the coking of pottery, powder metallurgy, new material, mine, steel industry, blast furnace ignitions, the microwave high-temperature heating technique has been listed in People's Republic of China's " Policy of Technology For Energy Saving outline " emphasis disseminate technology.Damage but due to excessive microwave, the people is known from experience, so the key issue that the microwave energy utilization need to solve is exactly the microwave leakage that prevents instrument and equipment, that is: must be enclosed in (because metal can stop shield microwaves by reflection) in a metallic cavity to microwave, country has also formulated relevant industry standard for this reason: microwave leakage amount GB is＜5mW/cm
2
The fire door of all kinds of microwave apparatus equipment is as the access way of sample and material, for security consideration, must accomplish when fire door is closed and effectively to stop and shield microwaves, Leakage prevention is as U.S. Patent No. 4645892, Chinese patent CN1145998A, CN101752014A and CN1752571A.at present, the one-level micro-wave screening means that generally adopt are fire doors with fire door between form metal and contact (normally the face between corrosion resistant plate contacts) with intermetallic, but belonging in essence the hard of rigidity between metal and metal contacts, therefore between metal fire door and metal fire door, the comparatively desirable tight face of formation contacts if want, just necessarily require metal fire door and metal fire door to have simultaneously sufficiently high machining accuracy and the depth of parallelism, so just not only brought very large difficulty to processing, and improved production cost, particularly when the size of fire door and fire door is very large, desired machining accuracy of micro-wave screening and the depth of parallelism just are difficult to guarantee, too high production cost also becomes and is difficult to accept, sometimes people have to adopt microwave flow-disturbing groove, the multiple secondary micro-wave screening such as microwave-absorbing body and microwave suppressor having mode, therefore developing the low micro-wave screening mode of a kind of cost simple in structure has important practical significance.
Summary of the invention
The objective of the invention is to overcome microwave shielding structure processing difficulties and the high shortcoming of cost in existing door of microwave oven, a kind of novel micro-wave screening plate structure and manufacture method are provided.Its advantage is that micro-wave screening plate of the present invention not only can effectively stop and prevents microwave leakage by shield microwaves, and have simple in structure, the remarkable advantage of low cost of manufacture.
The present invention realizes above-mentioned purpose by following technical solution.The micro-wave screening plate of a kind of door for microwave oven of the present invention, it is characterized in that, the surrounding of barricade has hatch frame, opening size is: 0.5mm＜A/F＜10mm, but take 1mm＜A/F＜4mm as best, the opening degree of depth and aperture pitch determine to guarantee that projection between any two adjacent apertures and metal fire door edge or metal fire door edge facet close contact are as the criterion.Can cause microwave leakage due to opening size when excessive, therefore generally A/F is the smaller the better.
Described micro-wave screening plate uses metallic plate or the alloy sheets with elasticity and plasticity, its appearance and size is greater than the size on micro-wave oven metal furnaces doorway, guarantee simultaneously the surrounding opening at depth direction across edge, metal furnaces doorway, and under the prerequisite of guaranteeing projection between adjacent apertures and metal fire door edge or metal fire door edge facet close contact, barricade surrounding opening is the smaller the better in the metal fire door opening degree of depth of inner minute, usually less than 25mm, cause microwave leakage when excessive with the opening degree of depth that prevents part in fire door.
Described micro-wave screening plate hatch frame, its shape is any, can be rectangle, square, trapezoidal, semicircle, half elliptic, triangle, irregular, etc.The opening shape schematic diagram of micro-wave screening plate of the present invention as shown in Figure 1, wherein Fig. 1 a is the micro-wave screening plate with oblong openings 11 structures, Fig. 1 b is the micro-wave screening plate with square openings 12 structures, Fig. 1 c is the micro-wave screening plate with trapezoid-shaped openings 13 structures, Fig. 1 d is the micro-wave screening plate with semicircle 14 hatch frames, Fig. 1 e is the micro-wave screening plate with half elliptic 15 hatch frames, Fig. 1 f is the micro-wave screening plate with triangle 16 hatch frames, and Fig. 1 g is the micro-wave screening plate with irregular opening 17 structures.
micro-wave screening plate of the present invention will be fixed on door for microwave oven and cover, and require when fire door is closed, the micro-wave screening plate that is fixed on stove face plate will be stressed at mid portion, because the projection between adjacent apertures corresponding to micro-wave screening plate surrounding hatch frame can strain, it is hereby ensured each projection on the micro-wave screening plate can be closely pressed together on form the line contact on metal fire door edge or be closely pressed together on metal fire door edge facet on the contact of formation face, consequently these small embossments just have been divided into short gap corresponding to little opening with the slit gap that may occur between fire door and fire door, be subjected to the restriction of its wavelength due to microwave, microwave is to leak from the little opening part of barricade surrounding, therefore adopt the micro-wave screening plate of this hatch frame of the present invention just microwave well can be enclosed in the micro-wave oven metallic cavity, avoid leaking.
Advantage of the present invention and good effect:
The micro-wave screening plate of a kind of door for microwave oven of the present invention has following advantage and good effect:
(1) the micro-wave screening plate of door for microwave oven of the present invention can effectively stop and prevents microwave leakage by shield microwaves, and shield effectiveness can reach ambient level, even realizes zero leakage.
(2) the micro-wave screening plate structure of door for microwave oven of the present invention is very simple, low cost of manufacture.
(3) the micro-wave screening plate of door for microwave oven of the present invention is not subjected to the restriction of fire door size, especially is fit to large-sized fire door and fire door, and difficulty of processing is little.
Description of drawings
Fig. 1 is the opening shape schematic diagram of micro-wave screening plate of the present invention.
Fig. 2 is the schematic diagram of the micro-wave screening plate structure schematic diagram of the described door for microwave oven of first embodiment of the present invention and the relative position that contacts with door for microwave oven metal fire door thereof, wherein: before Fig. 2 a is micro-wave screening plate and the pressing of metal fire door, that is: before fire door is closed, after Fig. 2 b is micro-wave screening plate and the pressing of metal fire door, that is: after fire door is closed.
Fig. 3 is the micro-wave screening plate structure schematic diagram of second described door for microwave oven of embodiment of the present invention.
Fig. 4 is the micro-wave screening plate structure schematic diagram of the 3rd the described door for microwave oven of embodiment of the present invention.
Numeral in Fig. 2 of first embodiment and letter explanation:
21---the micro-wave screening plate, 22---oblong openings, 23---rectangular preiection, 24---micro-wave oven metal fire door, 25---metal fire door edge, 26---the facet at metal fire door edge, 27---the micro-wave oven metallic cavity, A---A/F, B---barricade surrounding opening is in the metal fire door opening degree of depth of inner minute.
Numeral in Fig. 3 of second embodiment and letter explanation:
C---A/F, D---the opening degree of depth, the arc radius in R---oblong openings bight, E---rectangular preiection width, F---rectangular preiection width.
Numeral in Fig. 4 of the 3rd embodiment and letter explanation:
G---oblong openings width, H---the oblong openings degree of depth, the arc radius in R---oblong openings bight, E---rectangular preiection width, I---rectangular preiection width, J---isosceles trapezoid opening water table opening, K---isosceles trapezoid opening base square, L---the isosceles trapezoid opening degree of depth.
The specific embodiment
The following example is to further explanation of the present invention and explanation, and the present invention is not constituted any limitation.
Embodiment 1:
The schematic diagram of the micro-wave screening plate structure schematic diagram in first embodiment of the invention and the relative position that contacts with door for microwave oven metal fire door thereof as shown in Figure 2, wherein: before Fig. 2 a is micro-wave screening plate and the pressing of metal fire door, that is: before fire door is closed, after Fig. 2 b is micro-wave screening plate and the pressing of metal fire door, that is: after fire door is closed.the micro-wave screening plate 21 of the present embodiment is selected the aluminium alloy plate with elasticity and plastic deformation ability, plate thickness 1mm, the barricade surrounding adopts the oblong openings structure, the A/F A of oblong openings 22 is 3mm, the opening degree of depth is 20mm, rectangular preiection 23 width (that is: aperture pitch) between adjacent apertures are 6mm, the appearance and size of micro-wave screening plate 21 is than the large 10mm of size of micro-wave oven metal fire door 24, barricade surrounding rectangular aperture at depth direction across metal fire door edge 25, barricade surrounding opening is 15mm in the metal fire door opening depth B of inner minute, this is the micro-wave screening plate of the described door for microwave oven of first embodiment of the invention.here, micro-wave screening plate 21 with oblong openings 22 structures will be fixed on stove face plate, and require when fire door is closed, the micro-wave screening plate 21 that is fixed on stove face plate will be stressed at mid portion, thereby the micro-wave screening plate is closely pressed together on formation face contact on the facet 26 that forms the line contact on metal fire door edge 25 or be closely pressed together on metal fire door edge, this is because rectangular preiection 23 corresponding to micro-wave screening plate surrounding hatch frame can strain, it is hereby ensured each rectangular preiection can be closely pressed together on metal fire door edge 25 or be closely pressed together on metal fire door edge facet 26 on, consequently these rectangle small embossments 23 just have been divided into short gap corresponding to the little opening of rectangle with the slit gap that may occur between fire door and fire door, be subjected to the restriction of its wavelength due to microwave, microwave is to leak by little opening part from the rectangle of barricade surrounding, therefore adopt the micro-wave screening plate of this hatch frame just microwave well can be enclosed in micro-wave oven metallic cavity 27, avoid leaking.
Embodiment 2:
The micro-wave screening plate structure schematic diagram of second described door for microwave oven of embodiment of the present invention as shown in Figure 3.The micro-wave screening plate of the present embodiment is selected 304 corrosion resistant plates with elasticity and plastic deformation ability, plate thickness 1mm, the barricade surrounding adopts the oblong openings structure, A/F C is 2mm, and the opening depth D is 12mm, and arc structure is adopted in the bight of oblong openings, arc radius R is 1mm, rectangular preiection between adjacent apertures adopts two kinds of sizes, and be respectively: rectangular preiection width E (that is: aperture pitch E) is 2mm, and rectangular preiection width F (that is: aperture pitch F) is 10mm.The appearance and size of micro-wave screening plate is than the large 10mm of size of micro-wave oven metal fire door, barricade surrounding rectangular aperture at depth direction across metal fire door edge, barricade surrounding opening is at the metal fire door opening degree of depth 7mm of inner minute, this is the micro-wave screening plate of the described door for microwave oven of second embodiment of the invention, the relative position figure of barricade and metal fire door is with reference to Fig. 2 of first embodiment, and its using method and micro-wave screening principle are same as first embodiment.
Embodiment 3:
The micro-wave screening plate structure schematic diagram of the 3rd the described door for microwave oven of embodiment of the present invention as shown in Figure 4.The micro-wave screening plate of the present embodiment is selected 304 corrosion resistant plates with elasticity and plastic deformation ability, plate thickness 0.8mm, and the barricade surrounding adopts rectangle and two kinds of hatch frames of isosceles trapezoid.The oblong openings width G is 2mm, and the opening depth H is 12mm, and arc structure is adopted in the bight of oblong openings, and arc radius R is 1mm, and the rectangular preiection width I between adjacent apertures (that is: aperture pitch I) is 2mm.Isosceles trapezoid opening water table opening J is 2mm, and base square K is 4mm, and opening degree of depth L is 12mm.The appearance and size of micro-wave screening plate is than the large 12mm of size of micro-wave oven metal fire door, barricade surrounding rectangular aperture at depth direction across metal fire door edge, barricade surrounding opening is at the metal fire door opening degree of depth 6mm of inner minute, this is the micro-wave screening plate of the described door for microwave oven of third embodiment of the invention, the relative position figure of barricade and metal fire door is with reference to Fig. 2 of first embodiment, and its using method and micro-wave screening principle are same as first embodiment.
Claims (3)
1. the micro-wave screening plate of a door for microwave oven, it is characterized in that, the surrounding of barricade has hatch frame, opening size is: 0.5mm＜A/F＜10mm, but take 1mm＜A/F＜4mm as best, the opening degree of depth and aperture pitch determine to guarantee that projection between any two adjacent apertures and metal fire door edge or metal fire door edge facet close contact are as the criterion.
2. the micro-wave screening plate of door for microwave oven according to claim 1, it is characterized in that, described micro-wave screening plate uses metallic plate or the alloy sheets with elasticity and plasticity, its appearance and size is greater than the size on micro-wave oven metal furnaces doorway, guarantee simultaneously the surrounding opening at depth direction across edge, metal furnaces doorway, and barricade surrounding opening in the metal fire door opening degree of depth of inner minute less than 25mm.
3. the micro-wave screening plate of door for microwave oven according to claim 1, is characterized in that, described opening, and its shape is any, can be rectangle, square, trapezoidal, semicircle, half elliptic, triangle, irregular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101365910A CN103175242A (en) | 2013-04-19 | 2013-04-19 | Microwave shield plate of microwave oven door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101365910A CN103175242A (en) | 2013-04-19 | 2013-04-19 | Microwave shield plate of microwave oven door |
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| CN103175242A true CN103175242A (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013101365910A Pending CN103175242A (en) | 2013-04-19 | 2013-04-19 | Microwave shield plate of microwave oven door |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104491898A (en) * | 2014-12-25 | 2015-04-08 | 天津泰合兴业科技有限公司 | Medical cabinet type microwave sterilization machine |
| CN104501274A (en) * | 2014-11-19 | 2015-04-08 | 成都实景信息技术有限公司 | Low cost ray-proof structure |
| CN107218638A (en) * | 2017-06-08 | 2017-09-29 | 广东美的厨房电器制造有限公司 | A kind of shield plate of microwave and microwave cooking device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57170487A (en) * | 1981-04-14 | 1982-10-20 | Matsushita Electric Ind Co Ltd | Door for electronic range |
| US5958278A (en) * | 1997-09-08 | 1999-09-28 | Amana Company, L.P. | Microwave oven having an orthogonal electromagnetic seal |
| JP2001148286A (en) * | 2000-10-12 | 2001-05-29 | Sharp Corp | Radio wave sealing device of high frequency heater |
| CN1598409A (en) * | 2003-09-15 | 2005-03-23 | Lg电子株式会社 | Door assembly of microwave oven |
| TW200914774A (en) * | 2007-09-21 | 2009-04-01 | Wen-Qing Li | Hybrid microwave oven |
| CN201314619Y (en) * | 2008-09-09 | 2009-09-23 | 美的集团有限公司 | Microwave leakage protection device |
-
2013
- 2013-04-19 CN CN2013101365910A patent/CN103175242A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57170487A (en) * | 1981-04-14 | 1982-10-20 | Matsushita Electric Ind Co Ltd | Door for electronic range |
| US5958278A (en) * | 1997-09-08 | 1999-09-28 | Amana Company, L.P. | Microwave oven having an orthogonal electromagnetic seal |
| JP2001148286A (en) * | 2000-10-12 | 2001-05-29 | Sharp Corp | Radio wave sealing device of high frequency heater |
| CN1598409A (en) * | 2003-09-15 | 2005-03-23 | Lg电子株式会社 | Door assembly of microwave oven |
| TW200914774A (en) * | 2007-09-21 | 2009-04-01 | Wen-Qing Li | Hybrid microwave oven |
| CN201314619Y (en) * | 2008-09-09 | 2009-09-23 | 美的集团有限公司 | Microwave leakage protection device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501274A (en) * | 2014-11-19 | 2015-04-08 | 成都实景信息技术有限公司 | Low cost ray-proof structure |
| CN104501274B (en) * | 2014-11-19 | 2016-08-10 | 成都实景信息技术有限公司 | A kind of low cost radiation resistant structure |
| CN104491898A (en) * | 2014-12-25 | 2015-04-08 | 天津泰合兴业科技有限公司 | Medical cabinet type microwave sterilization machine |
| CN107218638A (en) * | 2017-06-08 | 2017-09-29 | 广东美的厨房电器制造有限公司 | A kind of shield plate of microwave and microwave cooking device |
| CN107218638B (en) * | 2017-06-08 | 2019-09-20 | 广东美的厨房电器制造有限公司 | A kind of shield plate of microwave and microwave cooking device |
| US11582840B2 (en) | 2017-06-08 | 2023-02-14 | Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd. | Microwave shielding plate and microwave cooking device |
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Application publication date: 20130626 |