CN102087952A - Microwave cavity and double-waveguide microwave plasma lamp - Google Patents
Microwave cavity and double-waveguide microwave plasma lamp Download PDFInfo
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- CN102087952A CN102087952A CN200910258669XA CN200910258669A CN102087952A CN 102087952 A CN102087952 A CN 102087952A CN 200910258669X A CN200910258669X A CN 200910258669XA CN 200910258669 A CN200910258669 A CN 200910258669A CN 102087952 A CN102087952 A CN 102087952A
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Abstract
The invention discloses a microwave cavity and a double-waveguide microwave plasma lamp comprising the microwave cavity. The microwave cavity is used for preventing the microwave from leaking and emits a generated ray. The microwave cavity comprises two short circuit plates, a first waveguide and a metal shielding net, wherein the short circuit plates are used for preventing the microwave from leaking and reflecting the generated ray; the first waveguide is used for stimulating the microwave so as to generate the ray and reflect the generated ray; the metal shielding net is used for preventing the microwave from leaking and emitting the generated ray out of the microwave cavity; and the two short circuit plates, the metal shielding net and the first waveguide form a closed cavity. The waveguide stimulation technology is adopted in the microwave cavity and the double-waveguide microwave plasma lamp, the stimulation effect is good, and the ray can be effectively emitted to the external space. Meanwhile, the microwave cavity and the double-waveguide microwave plasma lamp have the advantages of low processing difficulty, small volume, light weight and low manufacture cost.
Description
Technical field
The present invention relates to the electric light source field, particularly a kind of microwave cavity and comprise that the double wave of microwave cavity leads the microwave plasma lamp.
Background technology
Existing microwave plasma lamp generally comprises the magnetron that generates microwave, the waveguide of coupling and Transmission Microwave, resonant cavity that is coupled by seam or hole and electrodeless bulb etc.Electrodeless bulb places resonant cavity, is generated light by microwave excitation.Resonant cavity need be processed into the solid (for example cylinder bodily form etc.) with certain rotating speed, and is necessary for the network structure with high light transmission rate characteristic.Therefore, difficulty of processing is higher.Have big, the Heavy Weight of volume of the microwave plasma lamp of this resonant cavity, cost an arm and a leg.
Chinese patent ZL99241233.1, ZL01274852.8 disclose another kind of microwave plasma lamp, have removed microwave cavity, use the rectangular waveguide exciting technique instead, have reduced the difficulty of processing and the manufacturing cost of microwave plasma lamp.The shortcoming of this microwave plasma lamp is: at the residing waveguide mouth of electrodeless bulb because rectangular waveguide E limit broad, electric field strength a little less than, thereby influence arousal effect.In addition, the residing position of electrodeless bulb causes part light can not penetrate to space outerpace, influences illuminating effect.
Summary of the invention
In view of this, the technical problem that the present invention solves has been to provide a kind of microwave cavity and has comprised that the double wave of microwave cavity leads the microwave plasma lamp, utilizes the waveguide excitation technology, and arousal effect is good, can also light be penetrated to space outerpace.Simultaneously, the difficulty of processing that microwave cavity and double wave are led the microwave plasma lamp is low, and volume is little, and is in light weight, low cost of manufacture.
The present invention is achieved by the following technical solutions: a kind of microwave cavity is used to prevent microwave leakage, and the light that generates is penetrated that described microwave cavity comprises: two short boards, be used to prevent microwave leakage, and the light of reflection generation; One first waveguide is used to encourage microwave, with generation light, and the light of reflection generation; With a metallic shield net, be used to prevent microwave leakage, and the light that generates is penetrated described microwave cavity; Two short boards, metallic shield net and first waveguides form closed cavity.
Further, described first waveguide is the semiellipse cylindricality of hollow.
Further, described two short boards are symmetrically distributed in the described first waveguide both sides, and the angle between the described short board and first waveguide is greater than 90 degree.
Further, the approximate centre position on the surface of described first waveguide offers the microwave resonance window, is used for microwave is coupled to described microwave cavity.
Further, described microwave resonance window is provided with the medium mica sheet.
Further, described microwave resonance window is roughly rectangle.
Further, described short board is a concave mirror.
Preferably, described short board is made of aluminum.
Further, described short board, first waveguide and metallic shield net are made by identical metal.
Preferably, described short board, first waveguide and metallic shield net are made of aluminum.
Further, described metallic shield net is connected by screw, rivet or welding manner with described first waveguide.
The present invention also provides a kind of double wave to lead the microwave plasma lamp, comprising: a magnetron by the variable frequency power supply power supply, is used to generate microwave; One second waveguide is used for coupling and Transmission Microwave; An electrodeless bulb, the microwave of described second waveguide bombards described electrodeless bulb, generate plasma light, described magnetron links to each other with described second waveguide, described double wave is led the microwave plasma lamp and is also comprised above-mentioned microwave cavity, links to each other with described second waveguide, is used to prevent microwave leakage, and the light that generates penetrated described microwave cavity, described electrodeless bulb places described microwave cavity.
Further, described second waveguide is a rectangular waveguide.
Further, described magnetron comprises transmitting antenna, is coated with the medium mica sheet on the described transmitting antenna, and described magnetron is connected with described second waveguide by described transmitting antenna.
Further, described electrodeless bulb is positioned at the approximate centre position of described microwave cavity.
Further, described electrodeless bulb is a quartz bulb.
Microwave cavity of the present invention forms closed cavity by two short boards, metallic shield net and first waveguide, effectively prevents microwave leakage, and the light that generates is penetrated.
First waveguide of the present invention is the semiellipse cylindricality of hollow, is used to encourage microwave, to generate light.Utilize the waveguide excitation technology, arousal effect is good.Simultaneously, the semiellipse cylindricality is with respect to the columniform network structure of prior art, and difficulty of processing is low, and volume is little, and is in light weight, low cost of manufacture.
Double wave of the present invention is led the microwave plasma lamp and is comprised two waveguides, with microwave by in second waveguide-coupled to the first waveguide.Electrodeless bulb is generated light by first waveguide excitation.By the light reflection of short board, the light that generates is penetrated to space outerpace from the metallic shield net.Double wave of the present invention is led the microwave plasma lamp and is utilized the waveguide excitation technology, and arousal effect is good, and the light that generates can be penetrated described microwave cavity.Simultaneously, the difficulty of processing that double wave of the present invention is led the microwave plasma lamp is low, and volume is little, and is in light weight, low cost of manufacture.
Be described further below with reference to the technique effect of accompanying drawing, to understand purpose of the present invention, feature and effect fully design of the present invention, concrete structure and generation.
Description of drawings
Fig. 1 is the stereogram of the microwave cavity of preferred embodiment of the present invention;
Fig. 2 is the stereogram that the double wave of preferred embodiment of the present invention is led the microwave plasma lamp;
Fig. 3 is the front view that the double wave of preferred embodiment of the present invention is led the microwave plasma lamp;
Fig. 4 is the vertical view that the double wave of preferred embodiment of the present invention is led the microwave plasma lamp;
Fig. 5 is the profile of Fig. 4 along the A-A direction.
Description of symbols: 1 magnetron, 2 second waveguides, 3 ring flanges, 4 metallic shield nets, 5 first waveguides, 6 electrodeless bulbs, 7 direct current machines, 8 short boards, 9 medium mica sheets, 10 microwave resonance windows, 11 microwave cavities
Embodiment
See also Fig. 1, a kind ofly be used to prevent microwave leakage, and, comprising the microwave cavity 11 that the light that generates penetrates: two short boards 8, be used to prevent microwave leakage, and the light that generates of reflection; One first waveguide 5 is used to encourage microwave, with generation light, and the light of reflection generation; With a metallic shield net 4, be used to prevent microwave leakage, and the light that generates is penetrated microwave cavity 11.Two short boards 8, metallic shield net 4 and first waveguides 5 form closed cavity.Metallic shield net 4 is fixedlyed connected with first waveguide 5 by the some screws on the ring flange 3.
In the present embodiment, first waveguide 5 is the semiellipse cylindricality of hollow.Two short boards 8 are concave mirror, are symmetrically distributed in the both sides of first waveguide 5, are connected at a certain angle with first waveguide 5.Angle between first waveguide 5 and the short board 8 determines that by the experiment of microwave light source this angle need guarantee that the light that generates can be reflected onto metallic shield net 4.This angle is greater than 90 degree, and preferably, this angle is slightly larger than 90 degree.
Two short boards 8, metallic shield net 4 and first waveguides 5 are made by same metal, aluminium for example, iron, stainless steel etc.Preferably, two short boards 8, metallic shield net 4 and first waveguides 5 are made of aluminum.
Approximate centre position at the cylinder of the semiellipse post of first waveguide 5 offers microwave resonance window 10, is used for microwave is coupled to microwave cavity 11.Microwave resonance window 10 is roughly rectangle, and the size of rectangle is determined that by the experiment of microwave light source this size need guarantee that the microwave energy of second waveguide, 2 outputs is coupled to first waveguide 5 fully.Preferably, microwave resonance window 10 is provided with the medium mica sheet, helps strengthening the effect of excitation discharge.
See also Fig. 2～Fig. 5, a kind of double wave is led the microwave plasma lamp, comprises a magnetron 1, by the variable frequency power supply power supply, is used to generate microwave; One second waveguide 2 is used for coupling and Transmission Microwave; An electrodeless bulb 6 places the microwave bombardment electrodeless bulb 6 of microwave cavity 11, the second waveguides 2 transmission, generates plasma light; Microwave cavity 11 links to each other with second waveguide 2, is used to prevent microwave leakage, and the light that generates is penetrated microwave cavity 11.Magnetron 1 links to each other by transmitting antenna second waveguide 2, is coated with the medium mica sheet on the transmitting antenna.
Magnetron 1 generated frequency is the microwave of 2.45GHz, by second waveguide 2, the second waveguides 2 permission Hs of transmission antennas transmit to rectangle
10The microwave of modulus passes through.H
10The microwave of modulus is coupled to microwave cavity 11 through the microwave resonance window 10 of rectangle.First waveguide, the 5 excitation microwaves of semiellipse cylindricality, the electrodeless bulb 6 in the bombardment microwave cavity 11.Electrodeless bulb 6 contains highly purified sulphur powder and argon gas, generates the white light of approximate day spectrum after bombarding.To reflect the light that generates by first waveguide 5 and two short boards 8, light injects to space outerpace via metallic shield net 4.
Variable frequency power supply is magnetron 1 power supply, and the electrodeless bulb 6 with connecting rod links to each other with the direct current machine 7 of outside.Direct current machine 7 can make microwave irradiation even, and can reduce the temperature of bulb, helps realizing impedance matching.Direct current machine 7 is rotated with the speed that per minute 300～600 changes.
Through the experimental verification of microwave light source, be 24 millimeters electrodeless bulb 6 if use diameter, when input power is 600 watt-hours, can generate light efficiency is 90 lumens/watt, and colour temperature is 6000 Kelvins, and color rendering index is 80 plasma light.
It should be noted that, every structural parameters of microwave cavity 11 of the present invention, the size of first waveguide 5 for example, the size of microwave resonance window 10, the spacing of two short boards 8, angle between the short board 8 and first waveguide 5, the manufactured materials of microwave cavity 11 etc. all should be adjusted by the experiment of microwave light source, lead the impedance matching of the microwave system of microwave plasma lamp to realize whole double wave.
In addition, metallic shield net 4 is not limited to screw with first waveguide 5 and is connected, and also can pass through connected modes such as rivet, welding and fixedly connected with first waveguide 5, only needs to realize that the function that metallic shield net 4 is connected with first waveguide 5 gets final product.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area need not creative work and just can design according to the present invention make many modifications and variations.Therefore, all technical staff in the art all should be in claim protection range of the present invention under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (16)
1. a microwave cavity is used to prevent microwave leakage, and the light that generates is penetrated, and it is characterized in that described microwave cavity comprises:
Two short boards are used to prevent microwave leakage, and the light of reflection generation;
One first waveguide is used for the excitation discharge, with generation light, and the light of reflection generation;
With a metallic shield net, be used to prevent microwave leakage, and the light that generates is penetrated described microwave cavity;
Described two short boards, described metallic shield net and described first waveguide form closed cavity.
2. a kind of microwave cavity according to claim 1 is characterized in that, described first waveguide is the semiellipse cylindricality of hollow.
3. microwave cavity according to claim 1 and 2 is characterized in that, described two short boards are symmetrically distributed in the described first waveguide both sides, and the angle between the described short board and first waveguide is greater than 90 degree.
4. microwave cavity according to claim 1 and 2 is characterized in that, the approximate centre position on the surface of described first waveguide offers the microwave resonance window, is used for microwave is coupled to described microwave cavity.
5. microwave cavity according to claim 4 is characterized in that, described microwave resonance window is provided with the medium mica sheet.
6. microwave cavity according to claim 4 is characterized in that, described microwave resonance window is roughly rectangle.
7. microwave cavity according to claim 1 is characterized in that, described short board is a concave mirror.
8. microwave cavity according to claim 6 is characterized in that described short board is made of aluminum.
9. microwave cavity according to claim 1 is characterized in that, described short board, first waveguide and metallic shield net are made by identical metal.
10. microwave cavity according to claim 9 is characterized in that, described short board, first waveguide and metallic shield net are made of aluminum.
11. microwave cavity according to claim 1 is characterized in that, described metallic shield net is connected by screw, rivet or welding manner with described first waveguide.
12. a double wave is led the microwave plasma lamp, comprising:
A magnetron by the variable frequency power supply power supply, is used to generate microwave;
One second waveguide is used for coupling and Transmission Microwave;
An electrodeless bulb, the microwave of described second waveguide bombards described electrodeless bulb, generates plasma light,
Described magnetron links to each other with described second waveguide,
It is characterized in that described double wave is led the microwave plasma lamp and also comprised microwave cavity as claimed in claim 1, link to each other with described second waveguide, be used to prevent microwave leakage, and the light that generates is penetrated described microwave cavity, described electrodeless bulb places described microwave cavity.
13. double wave according to claim 12 is led the microwave plasma lamp, it is characterized in that, described second waveguide is a rectangular waveguide.
14. double wave according to claim 12 is led the microwave plasma lamp, it is characterized in that, described magnetron comprises transmitting antenna, is coated with the medium mica sheet on the described transmitting antenna, and described magnetron is connected with described second waveguide by described transmitting antenna.
15. double wave according to claim 12 is led the microwave plasma lamp, it is characterized in that, described electrodeless bulb is positioned at the approximate centre position of described microwave cavity.
16. double wave according to claim 12 is led the microwave plasma lamp, it is characterized in that, described electrodeless bulb is a quartz bulb.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910258669XA CN102087952A (en) | 2009-12-08 | 2009-12-08 | Microwave cavity and double-waveguide microwave plasma lamp |
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| CN200910258669XA CN102087952A (en) | 2009-12-08 | 2009-12-08 | Microwave cavity and double-waveguide microwave plasma lamp |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363325A (en) * | 2012-03-30 | 2013-10-23 | 海洋王照明科技股份有限公司 | Anti-electromagnetic interference lamp |
| CN106548921A (en) * | 2015-09-17 | 2017-03-29 | 李碧霞 | A kind of microwave sulfur lamp discharged based on 1/4 λ double cones coaxial resonant cavity |
| CN108902650A (en) * | 2018-08-22 | 2018-11-30 | 江苏麦克威微波技术有限公司 | A kind of microwave thawing equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3323637A1 (en) * | 1982-06-30 | 1984-01-05 | Fusion Systems Corp., 20852 Rockville, Md. | ELECTRODELESS LAMP AND PROVIDED LAMP HOUSING |
| CN2336191Y (en) * | 1997-09-24 | 1999-09-01 | 中国工程物理研究院核物理与化学研究所 | Microwave sulfur lamp device |
| US5998934A (en) * | 1997-05-15 | 1999-12-07 | Matsushita Electronics Corporation | Microwave-excited discharge lamp apparatus |
| CN1290025A (en) * | 1999-09-29 | 2001-04-04 | 金行星 | Sulfur lamp with waveguide discharge to excite microwave |
| CN2679965Y (en) * | 2004-02-09 | 2005-02-16 | 金行星 | Microwave plasma light source |
| CN201681794U (en) * | 2009-12-08 | 2010-12-22 | 上海明凯照明有限公司 | Microwave cavity and double-waveguide microwave plasma lamp |
-
2009
- 2009-12-08 CN CN200910258669XA patent/CN102087952A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3323637A1 (en) * | 1982-06-30 | 1984-01-05 | Fusion Systems Corp., 20852 Rockville, Md. | ELECTRODELESS LAMP AND PROVIDED LAMP HOUSING |
| US5998934A (en) * | 1997-05-15 | 1999-12-07 | Matsushita Electronics Corporation | Microwave-excited discharge lamp apparatus |
| CN2336191Y (en) * | 1997-09-24 | 1999-09-01 | 中国工程物理研究院核物理与化学研究所 | Microwave sulfur lamp device |
| CN1290025A (en) * | 1999-09-29 | 2001-04-04 | 金行星 | Sulfur lamp with waveguide discharge to excite microwave |
| CN2679965Y (en) * | 2004-02-09 | 2005-02-16 | 金行星 | Microwave plasma light source |
| CN201681794U (en) * | 2009-12-08 | 2010-12-22 | 上海明凯照明有限公司 | Microwave cavity and double-waveguide microwave plasma lamp |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363325A (en) * | 2012-03-30 | 2013-10-23 | 海洋王照明科技股份有限公司 | Anti-electromagnetic interference lamp |
| CN106548921A (en) * | 2015-09-17 | 2017-03-29 | 李碧霞 | A kind of microwave sulfur lamp discharged based on 1/4 λ double cones coaxial resonant cavity |
| CN108902650A (en) * | 2018-08-22 | 2018-11-30 | 江苏麦克威微波技术有限公司 | A kind of microwave thawing equipment |
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Application publication date: 20110608 |