CN103915313A - Coaxial resonant cavity microwave light source - Google Patents
Coaxial resonant cavity microwave light source Download PDFInfo
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- CN103915313A CN103915313A CN201410166712.0A CN201410166712A CN103915313A CN 103915313 A CN103915313 A CN 103915313A CN 201410166712 A CN201410166712 A CN 201410166712A CN 103915313 A CN103915313 A CN 103915313A
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- resonant cavity
- coaxial resonant
- magnetron
- radome
- light source
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Abstract
The invention provides a coaxial resonant cavity microwave light source which comprises a magnetron (1) for generating microwaves, a magnetron antenna (5) which is connected with the magnetron (1), a tapered waveguide (7) which is fixed on the magnetron (1) and is located at the periphery of the magnetron antenna (5), a shielding case which is fixed on the tapered waveguide (7) and a coaxial resonant cavity (8) which is formed by the magnetron antenna (5), the tapered waveguide (7) and the shielding case, wherein an electrodeless bulb (3) is arranged in the coaxial resonant cavity (8). The electrodeless bulb is a small quartz ball, and the small quartz ball is filled with luminescent substances and starting gas. The center lines of the electrodeless bulb (3), the tapered waveguide (7), the magnetron antenna (5) and the shielding case are at the same central axis line. The coaxial resonant cavity microwave light source is characterized in that the coaxial resonant cavity is a lambada/ 4 coaxial resonant cavity; a light hole (14) is formed at the top of the shielding case, and the center of the light hole (14) is located on the central axis line. The shielding case is a mesh shielding case (4) or a non mesh shielding case (16).
Description
One, technical field
The present invention relates to Non-polarized lamp electric light source field, particularly a kind of microwave plasma light source technology.
Two, background technology
The 3400W HIGH-POWERED MICROWAVES sulphur lamp (Non-polarized lamp) of being invented by American for 1994 comes out, because this new type light source light efficiency is high, energy-saving and environmental protection, approximate sunlight color, was once once causing a sensation illumination circle, and after this HIGH-POWERED MICROWAVES sulphur lamp is full of international market a period of time.20 beginnings of the century, just there is tens of the enterprises above HIGH-POWERED MICROWAVES sulphur of the 1000W lamp that releases one after another in China, but has arrived now, the production of HIGH-POWERED MICROWAVES sulphur lamp, uses and has declined to a great extent.Tracing it to its cause, is mainly due to reasons such as the security reliability of HIGH-POWERED MICROWAVES sulphur lamp are poor, price is high, the life-span is short, has hindered promoting the use of of this lamp.Practice shows, adopts low power microwave light source, both can overcome above-mentioned shortcoming, can keep again advantages efficient, energy-saving and environmental protection.But the minimum 700W that also can only accomplish on the market at present.
The core technology of microwave light source is exactly microwave cavity technology.Design a microwave light source that performance is good, will design the microwave cavity of a high quality factor Q value, high transmission rate.American, in the beginning of this century, has transferred LG company by HIGH-POWERED MICROWAVES sulphur lamp technology high price, sets about again researching and developing the microwave light source of semiconductor microactuator wave source drive medium resonant cavity simultaneously, succeeds, and has released the LEP product of 150W～500W.But this microwave light source also has weak point: 1, semiconductor microwave source technology, and price is higher at present, and therefore price of complete machine is also higher, and the LEP lamp price of a general 300W is 6000 yuan of left and right; 2, because adopting media ceramic to do microwave cavity, bring dielectric loss, affect the raising of light efficiency; 3, mercurous in bulb and
85kr radioactivity is not real environment-friendly products.
HIGH-POWERED MICROWAVES light source is general adopts cylindrical or rectangle microwave resonant cavity, but in the time of the low power microwave light source of development, this two classes microwave cavity is just not quite suitable.Also some coaxial resonant cavities that released one after another are in recent years applied on microwave light source, as Chinese patent ZL200720078798.7 discloses a kind of compact electrodeless lamp, what adopt is trumpet type coaxial resonant cavity, light efficiency is very high, but experiment finds that light transmission part, resonator surface only accounts for 1/5, and luminaire efficiency is not high.Chinese patent ZL201120072612.3 discloses a kind of double cone microwave cavity.Cavity light transmitting surface is long-pending accounts for 1/2, and luminaire efficiency increases, but can't meet the demands.
LED light source be called as at present the 4th generation lighting source or green light source, widely promoted and use by people.There is the outstanding advantages such as light efficiency is high, energy-conserving and environment-protective, operating voltage is low, the life-span is long, volume is little due to it.But LED is not as microwave light source (sulphur lamp) aspect light source qualitative characteristics, and these weak points are mainly manifested in:
Light efficiency is high not as good as microwave sulfur lamp.
LED is that atom spectrum is good less than the molecular spectrum of microwave sulfur lamp.LED light source is by adopting the fluorescence spectrum of blue-ray LED or ultraviolet LED+laser fluorescence powder, or polycrystal indigo plant, red, green multiple spectrum combines, and light source color rendering index is in 75 left and right, and the spectrum of LED is discontinuous.And microwave sulfur lamp color rendering index is generally in 85 left and right, spectrum is continuous, approaches very much sunlight spectrum.
LED product is more responsive to temperature, and the heat dissipation problem of high-power LED product is a difficult problem at present.
The light decay of LED product is large, and after 10000 hours, light decay is greater than 20%, microwave sulfur lamp after 10000 hours light decay be less than 2%.
Comprehensively above-mentioned, it is generally acknowledged that illumination below small-power 200w adopts LED light source comparatively suitable, because a current high-power LED product is such as the LED price of 300w is 6000 yuan of left and right, this is difficult to be accepted by user.
So general LEP light source or the low-powered microwave sulfur lamp (LSL) of adopting is for well more than 200w.But present stage LEP product is still too expensive in price, therefore developing cheap low-powered microwave sulfur lamp (LSL) energy saving environmental protection product more has realistic meaning.
Three, summary of the invention
The object of the invention is to design a kind of small-power coaxial resonant cavity microwave light source with high quality factor Q value, high transmission rate.
Basic ideas of the present invention are: being beneficial to λ/4 coaxial resonant cavity is not totally enclosed (being that one end is opening) this principle, adopt compact structure, realize the small-power coaxial resonant cavity microwave light source with high quality factor Q value, high transmission rate.
The present invention is achieved in that a kind of coaxial resonant cavity microwave light source, comprise the magnetron that produces microwave, the magnetron antenna being connected with magnetron, is fixed on magnetron and is positioned at the Conical Waveguide of magnetron antenna periphery, is fixed on the radome above Conical Waveguide.Magnetron antenna, Conical Waveguide, radome form coaxial resonant cavity, electrodeless bulb is housed in coaxial resonant cavity, electrodeless bulb is quartzy bead, in quartz bead, be filled with luminescent substance and start gas, the center line of electrodeless bulb, Conical Waveguide, magnetron antenna, radome all, on same axis, is characterized in that:
Coaxial resonant cavity is λ/4 coaxial resonant cavity;
Radome top has loophole, and being centered close on axis of loophole.
Further scheme is: magnetron antenna sidewall is equipped with mica cover.
Further scheme is: radome is mesh radome;
Magnetron antenna top is fixed with layer of reflective material, and electrodeless bulb is fixed in layer of reflective material by adhesive linkage.
Further scheme is: radome is without mesh radome;
On loophole inwall, be fixed with orifice ring, on orifice ring inwall, attacked internal thread;
Have on a quartz curette rim of a cup outer wall and be fixed with adjustable ring, on adjustable ring outer wall, attacked external screw thread, layer of reflective material is housed in quartz curette, electrodeless bulb is fixed in layer of reflective material by adhesive linkage;
The internal thread of orifice ring matches with the external screw thread of adjustable ring.
Between magnetron antenna top and layer of reflective material, also can be provided with mica spacer
In the present invention: layer of reflective material can adopt the SiO 2 powder of encapsulation etc.In electrodeless bulb, can be filled with the luminescent substances such as high purity sulphur, and be filled with certain such as argon gas of startup gas.Conical Waveguide can be made up of aluminium, and radome is woven after polishing by aluminium net and forms (mesh radome) or aluminium sheet and roll and form (without mesh radome).Radome seat and Conical Waveguide can integral manufacturings, also can split production.Adhesive linkage is generally high-temperature plastic.
Advantage of the present invention is: adopt the coaxial resonant cavity microwave light source of the compact structure of the present invention's design, have high quality factor Q value, high transmission rate, the small-power that can accomplish 300W～400W.Particularly the present invention has saved the motor and the control system that in conventional art, drive electrodeless bulb constantly to rotate, and making, maintenance cost all reduce greatly.The internal thread of orifice ring matches with the external screw thread of adjustable ring, can effectively mobile coaxial resonant cavity in the position of electrodeless bulb, thereby it is adjustable to implement resonance frequency, to reach optimum efficiency.The loophole at shielding new cover top has increased transparent surface greatly.
Four, brief description of the drawings
Fig. 1 is first embodiment of the invention agent structure schematic diagram.
Fig. 2 is the partial enlarged drawing in C region in Fig. 1.
Fig. 3 is second embodiment of the invention agent structure schematic diagram.
In figure: 1. magnetron, 2. radome seat, 3. electrodeless bulb, 4. mesh radome, 5. magnetron antenna, 6. mica cover, 7. Conical Waveguide, 8. coaxial resonant cavity, 9. adhesive linkage, 10. quartz curette, 11. layer of reflective material, 12. adjustable rings, 13. orifice rings, 14. loopholes, 15. mica spacers, 16. without mesh radome.
Five, embodiment
Below in conjunction with accompanying drawing, the present invention is described further.But enforcement of the present invention is not limited to the following example.
The first embodiment: as Fig. 1 and Fig. 2, a kind of coaxial resonant cavity microwave light source, comprise the magnetron 1 that produces microwave, the magnetron antenna 5 being connected with magnetron 1, be fixed on magnetron 1 and be positioned at the Conical Waveguide 7 of magnetron antenna 5 peripheries, be fixed on Conical Waveguide 7 radome above, magnetron antenna 5, Conical Waveguide 7, radome forms coaxial resonant cavity 8, electrodeless bulb 3 is housed in coaxial resonant cavity 8, electrodeless bulb 3 is quartzy bead, in quartz bead, be filled with luminescent substance and start gas, electrodeless bulb 3, Conical Waveguide 7, magnetron antenna 5, the center line of radome is all on same axis, it is characterized in that:
Coaxial resonant cavity is λ/4 coaxial resonant cavity;
Radome top has loophole 14, and being centered close on axis of loophole 14.
Magnetron antenna 5 sidewalls are equipped with mica cover 6.
Radome is mesh radome 4;
Magnetron antenna 5 tops are fixed with layer of reflective material 11, and electrodeless bulb 3 is fixed in layer of reflective material 11 by adhesive linkage 9.
Between magnetron antenna 5 tops and layer of reflective material 11, be also provided with mica spacer 15.
The second embodiment: as Fig. 3, a kind of coaxial resonant cavity microwave light source, comprise the magnetron 1 that produces microwave, the magnetron antenna 5 being connected with magnetron 1, be fixed on magnetron 1 and be positioned at the Conical Waveguide 7 of magnetron antenna 5 peripheries, be fixed on Conical Waveguide 7 radome above, magnetron antenna 5, Conical Waveguide 7, radome forms coaxial resonant cavity 8, electrodeless bulb 3 is housed in coaxial resonant cavity 8, electrodeless bulb 3 is quartzy bead, in quartz bead, be filled with luminescent substance and start gas, electrodeless bulb 3, Conical Waveguide 7, magnetron antenna 5, the center line of radome is all on same axis, it is characterized in that:
Coaxial resonant cavity is λ/4 coaxial resonant cavity;
Radome top has loophole 14, and being centered close on axis of loophole 14.
Magnetron antenna 5 sidewalls are equipped with mica cover 6.
Radome is without mesh radome 16;
On loophole 14 inwalls, be fixed with orifice ring 13, on orifice ring 13 inwalls, attacked internal thread;
Have on a quartz curette rim of a cup outer wall and be fixed with adjustable ring 12, on adjustable ring 12 outer walls, attacked external screw thread, layer of reflective material 11 is housed in quartz curette, electrodeless bulb 3 is fixed in layer of reflective material 11 by adhesive linkage 9;
The internal thread of orifice ring 13 matches with the external screw thread of adjustable ring 12.
Radome seat 2 can integral manufacturing with Conical Waveguide 7.
By the typical coaxial electrodeless lamp of above-mentioned two kinds of methods design, in the time that input power is 300w～400w, can obtain light efficiency 120lm/w, colour temperature 5000k～6000k, color rendering index is higher than 80 microwave light source.
Claims (5)
1. a coaxial resonant cavity microwave light source, comprise the magnetron (1) that produces microwave, the magnetron antenna (5) being connected with magnetron (1), be fixed on magnetron (1) and go up and be positioned at the Conical Waveguide (7) of magnetron antenna (5) periphery, be fixed on Conical Waveguide (7) radome above, magnetron antenna (5), Conical Waveguide (7), radome forms coaxial resonant cavity (8), electrodeless bulb (3) is housed in coaxial resonant cavity (8), electrodeless bulb (3) is quartzy bead, in quartz bead, be filled with luminescent substance and start gas.The center line of electrodeless bulb (3), Conical Waveguide (7), magnetron antenna (5), radome all, on same axis, is characterized in that:
Coaxial resonant cavity (8) is λ/4 coaxial resonant cavity;
Radome top has loophole (14), and being centered close on axis of loophole (14).
2. coaxial resonant cavity microwave light source according to claim 1, is characterized in that: magnetron antenna (5) sidewall is equipped with mica cover (6).
3. coaxial resonant cavity microwave light source according to claim 1, is characterized in that:
Radome is mesh radome (4);
Magnetron antenna (5) top is fixed with layer of reflective material (11), and electrodeless bulb (3) is fixed in layer of reflective material (11) by adhesive linkage (9).
4. coaxial resonant cavity microwave light source according to claim 1, is characterized in that:
Radome is without mesh radome (16);
On loophole (14) inwall, be fixed with orifice ring (13), on orifice ring (13) inwall, attacked internal thread;
Have on a quartz curette (10) rim of a cup outer wall and be fixed with adjustable ring (12), on adjustable ring (12) outer wall, attack external screw thread, layer of reflective material (11) is housed in quartz curette (10), and electrodeless bulb (3) is fixed in layer of reflective material (11) by adhesive linkage (9);
The internal thread of orifice ring (13) matches with the external screw thread of adjustable ring (12).
5. coaxial resonant cavity microwave light source according to claim 3, is characterized in that: between magnetron antenna (5) top and layer of reflective material (11), be also provided with mica spacer (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410166712.0A CN103915313B (en) | 2014-04-24 | 2014-04-24 | Coaxial resonant cavity microwave light source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410166712.0A CN103915313B (en) | 2014-04-24 | 2014-04-24 | Coaxial resonant cavity microwave light source |
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| Publication Number | Publication Date |
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| CN103915313A true CN103915313A (en) | 2014-07-09 |
| CN103915313B CN103915313B (en) | 2017-03-08 |
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| CN201410166712.0A Expired - Fee Related CN103915313B (en) | 2014-04-24 | 2014-04-24 | Coaxial resonant cavity microwave light source |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241082A (en) * | 2014-09-18 | 2014-12-24 | 单家芳 | Microwave coaxial cavity plasma 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 |
| CN112885705A (en) * | 2021-03-29 | 2021-06-01 | 李碧霞 | Microwave coaxial cavity metal halide lamp |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4902935A (en) * | 1988-06-29 | 1990-02-20 | Fusion Systems Corporation | Method and apparatus for evening out the temperature distribution of electrodeless lamp bulbs |
| US5525865A (en) * | 1994-02-25 | 1996-06-11 | Fusion Lighting, Inc. | Compact microwave source for exciting electrodeless lamps |
| CN202018949U (en) * | 2011-03-17 | 2011-10-26 | 雷彩云 | Coaxial biconical electrodeless lamp |
-
2014
- 2014-04-24 CN CN201410166712.0A patent/CN103915313B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4902935A (en) * | 1988-06-29 | 1990-02-20 | Fusion Systems Corporation | Method and apparatus for evening out the temperature distribution of electrodeless lamp bulbs |
| US5525865A (en) * | 1994-02-25 | 1996-06-11 | Fusion Lighting, Inc. | Compact microwave source for exciting electrodeless lamps |
| CN202018949U (en) * | 2011-03-17 | 2011-10-26 | 雷彩云 | Coaxial biconical electrodeless lamp |
Non-Patent Citations (1)
| Title |
|---|
| 丁荣林，李媛: "《微波技术与天线》", 31 August 2012, article ""无源微波元件"" * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241082A (en) * | 2014-09-18 | 2014-12-24 | 单家芳 | Microwave coaxial cavity plasma lamp |
| CN104241082B (en) * | 2014-09-18 | 2016-08-24 | 单家芳 | Microwave cylindrical coaxial cavity resonator plasma 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 |
| CN112885705A (en) * | 2021-03-29 | 2021-06-01 | 李碧霞 | Microwave coaxial cavity metal halide lamp |
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| Publication number | Publication date |
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| CN103915313B (en) | 2017-03-08 |
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Granted publication date: 20170308 |