CN204303753U - A kind of microwave ultraviolet lamp based on electron cyclotron resonace principle - Google Patents
A kind of microwave ultraviolet lamp based on electron cyclotron resonace principle Download PDFInfo
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- CN204303753U CN204303753U CN201520035709.5U CN201520035709U CN204303753U CN 204303753 U CN204303753 U CN 204303753U CN 201520035709 U CN201520035709 U CN 201520035709U CN 204303753 U CN204303753 U CN 204303753U
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- microwave
- fluorescent tube
- reflection shield
- permanent magnet
- ultraviolet lamp
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Abstract
Based on a microwave ultraviolet lamp for electron cyclotron resonace principle, belong to microwave non-electrode light sources technical field.To solve the problem that existing microwave ultraviolet line lamp fluorescent tube middle part start-up time is long and luminous efficiency is low.By fluorescent tube being placed in the microwave cavity that is made up of reflection shield and metallic shield net, permanent magnet is placed on the outer surface of reflection shield, and permanent magnet and fluorescent tube are located along the same line, reflection shield has feed-in mouth, the microwave that magnetron sends enters in reflection shield through magnetron excitation cavity and feed-in mouth, now permanent magnet produces stationary magnetic field around fluorescent tube, this stationary magnetic field and the microwave coupling entered in reflection shield, middle part in fluorescent tube is made to produce resonance acceleration, thus fluorescent tube middle part is started within a short period of time, the fluorescent tube middle part solving microwave ultraviolet lamp is long for start-up time, the problems such as luminous efficiency is low.The utility model may be used for the fields such as ultraviolet-sterilization, fluorescence excitation and ultra-violet curing.
Description
Technical field
The utility model belongs to microwave non-electrode light sources technical field.
Background technology
Microwave ultraviolet lamp is a kind of novel efficient electrodeless ultraviolet source.The operation principle of microwave ultraviolet lamp is as follows: high-frequency, the High-Power Microwave of first microwave source generation, by magnetron excitation cavity, enter from the feedback porch of reflection shield the closed resonant cavity be made up of reflection shield and metallic shield net, produce stronger electromagnetic field fluorescent tube inside (being filled with argon gas and mercury), the argon gas first punctured in fluorescent tube makes it discharge.Asia due to argon presses steady excited state can be slightly higher than the ionization energy of mercury, contributes to producing Penning effect, and then effectively makes mercury ionize, and become high level mercury ion, high level mercury ion, when transitting to low-lying level, outwards can give off ultraviolet light.
But in existing microwave ultraviolet lamp product, due in the start-up course of lamp, microwave energy on fluorescent tube non-uniform Distribution, but concentrate near feed-in mouth, only have small part microwave energy to concentrate on fluorescent tube mid portion, cause in start-up course, easily occur that fluorescent tube is first discharging in plasma state near feed-in notch portion, fluorescent tube mid portion is still gaseous state, thus greatly extends the start-up time of microwave ultraviolet lamp.And fluorescent tube operationally, because fluorescent tube middle part energy is less, makes the plasma density of fluorescent tube middle part lower, causes the luminous efficiency of fluorescent tube middle part low, have impact on the effect of ultra-violet curing.
Utility model content
The utility model is in order to solve the problem that existing microwave ultraviolet line lamp fluorescent tube middle part start-up time is long and luminous efficiency is low, also being the problem of the ultra-violet curing weak effect in order to solve this lamp, proposing a kind of microwave ultraviolet lamp based on electron cyclotron resonace principle.
Based on a microwave ultraviolet lamp for electron cyclotron resonace principle, it comprises magnetron, magnetron excitation cavity and fluorescent tube, and the magnetron microwave be used for by being sent communicating pipe injects in magnetron excitation cavity; It also comprises permanent magnet, permanent magnet containment vessel, reflection shield and metallic shield net;
Metallic shield net is fixed on the bottom of reflection shield, and metallic shield net and reflection shield form microwave cavity; Fluorescent tube is fixed in microwave cavity, and the axis of pitch of the central axis of fluorescent tube and reflection shield is positioned at same plane;
The two ends, left and right of the upper surface of reflection shield cover body have two feed-in mouths; Magnetron excitation cavity is fixed with directly over each feed-in mouth;
Permanent magnet is fixed on directly over described reflection shield cover body, and permanent magnet and described fluorescent tube are on same straight line;
Permanent magnet containment vessel is wrapped in top and the side of described permanent magnet.
Beneficial effect: a kind of microwave ultraviolet lamp based on electron cyclotron resonace principle described in the utility model utilizes the principle of electron cyclotron resonace, by introducing stationary magnetic field in fluorescent tube middle part, the problem such as fluorescent tube middle part start-up time of solving microwave ultraviolet lamp is long, luminous efficiency is low.
Permanent magnet is placed on the outer surface of reflection shield, and permanent magnet and fluorescent tube are located along the same line, reflection shield has feed-in mouth, the microwave that magnetron sends enters in reflection shield through magnetron excitation cavity and feed-in mouth, now permanent magnet produces stationary magnetic field around fluorescent tube, this stationary magnetic field and the microwave coupling entered in reflection shield, middle part in fluorescent tube is made to produce resonance acceleration, thus fluorescent tube middle part is started within a short period of time, the problem such as the fluorescent tube middle part start-up time solving microwave ultraviolet lamp is long, luminous efficiency is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of microwave ultraviolet lamp based on electron cyclotron resonace principle described in the utility model;
Fig. 2 is the end view of Fig. 1;
Fig. 3 is the focus schematic diagram of reflection shield.
Embodiment
Embodiment one, seeing figures.1.and.2 illustrates present embodiment, a kind of microwave ultraviolet lamp based on electron cyclotron resonace principle described in present embodiment, it comprises magnetron 4, magnetron excitation cavity 5 and fluorescent tube 7, and magnetron 4 injects in magnetron excitation cavity 5 for the microwave sent; It also comprises permanent magnet 1, permanent magnet containment vessel 2, reflection shield 6 and metallic shield net 8;
Metallic shield net 8 is fixed on the bottom of reflection shield 6, and metallic shield net 8 and reflection shield 6 form microwave cavity; Fluorescent tube 7 is fixed in microwave cavity, and the central axis of fluorescent tube 7 and the axis of pitch of reflection shield are positioned at same plane;
The two ends, left and right of the upper surface of reflection shield 6 cover body have two feed-in mouths; Magnetron excitation cavity 5 is fixed with directly over each feed-in mouth;
Permanent magnet 1 is fixed on directly over described reflection shield 6 cover body, and permanent magnet 1 and described fluorescent tube 7 are on same straight line;
Permanent magnet containment vessel 2 is wrapped in top and the side of described permanent magnet 1.
In present embodiment, the normal work of the stationary magnetic field interference magnetron 4 produced to prevent permanent magnet 1, covers permanent magnet containment vessel 2 in the top of permanent magnet 1 and side thereof.
Operation principle of the present invention is: the microwave that magnetron 4 sends, and through magnetron excitation cavity 5, enters in the closed microwave cavity be made up of reflection shield 6 and metallic shield net 8, and then light fluorescent tube 7 from the feed-in mouth reflection shield 6.The stationary magnetic field that permanent magnet 1 produces in the middle part of fluorescent tube 7 and the microwave coupling entered in microwave cavity, middle part in fluorescent tube 7 is made to produce resonance acceleration, thus fluorescent tube middle part is started within a short period of time, and improve the plasma density of fluorescent tube 7 middle part, improve its luminous efficiency.
What drive with traditional dependence transformer has compared with electrode ultraviolet lamps, and microwave ultraviolet light fixture described in the utility model has the following advantages: 1 electrodeless pollution; 2 ultraviolet efficiency are high, and ultraviolet light component can reach more than 30%; 3 fluorescent tubes are less, and the infrared power of generation is lower, and thermal radiation power is little; 4 long service life, can reach more than 8000 hours; 5 do not exist electrode corrosion phenomenon, and light efficiency is stablized.
Electron cyclotron resonace principle refers to, when electron gyro-frequency is equal to used microwave frequency, microwave energy can resonate coupling to electronics, and the resonance that electronics occurs is accelerated, thus makes the higher energy of electronics acquisition go to clash into neutral particle, makes it ionize.Applying electronic cyclotron resonance principle, can produce high density, high ionization degree and the uniform plasma of large volume under lower air pressure, thus solves Problems existing in existing product.The expression formula of electron gyro-frequency is:
ω
ce＝eB/m
e
Wherein, ω
cefor electron gyro-frequency, e is electronic charge, and B is applying constant external magnetic field, m
efor electron mass.
The microwave frequency sent as the magnetron 4 of microwave source is 2.45GHz, according to the expression formula of electron gyro-frequency, as applying constant external magnetic field B=875Gs, can meet the condition of resonance acceleration in fluorescent tube.
Embodiment two, this embodiment are further illustrating a kind of microwave ultraviolet lamp based on electron cyclotron resonace principle described in embodiment one, and in present embodiment, what described permanent magnet 1 adopted is Nd-Fe-B permanent magnet.
Embodiment three, this embodiment are further illustrating a kind of microwave ultraviolet lamp based on electron cyclotron resonace principle described in embodiment one, in present embodiment, the longitudinal cross-section of described reflection shield 6 cover body is oval half, and the longitudinal direction of reflection shield 6 cover body is major semiaxis, be laterally semi-minor axis.
In present embodiment, according to the content of execution mode one, permanent magnet 1 is fixed on directly over described reflection shield 6, and permanent magnet 1 and described fluorescent tube 7 are on same straight line; According to the focusing principle of ellipse, can ensure that the light that fluorescent tube sends focuses on the second oval focus place, see Fig. 3 after reflection shield internal surface reflection.
From reflection shield longitudinal cross-section, the longitudinal direction of reflection shield 6 cover body is major semiaxis, is laterally semi-minor axis.In Fig. 3, U represents semi-minor axis place axis, and V represents major semiaxis place axis.
Embodiment four, this embodiment are further illustrating a kind of microwave ultraviolet lamp based on electron cyclotron resonace principle described in embodiment one, and in present embodiment, the inner surface of the cover body of described reflection shield 6 is coated with aluminum oxide film.
In present embodiment, the inner surface spray aluminum oxide film of reflection shield 6, and in bright mirror surface characteristic, the wherein thermal that sends of aluminum oxide film Absorbable rod part fluorescent tube, ensure by exposed material can not Yin Wendu too high and be oxidized.
Claims (4)
1. the microwave ultraviolet lamp based on electron cyclotron resonace principle, it comprises magnetron (4), magnetron excitation cavity (5) and fluorescent tube (7), and magnetron (4) injects in magnetron excitation cavity (5) for the microwave sent; It is characterized in that, it also comprises permanent magnet (1), permanent magnet containment vessel (2), reflection shield (6) and metallic shield net (8);
Metallic shield net (8) is fixed on the bottom of reflection shield (6), and metallic shield net (8) and reflection shield (6) form microwave cavity; Fluorescent tube (7) is fixed in microwave cavity, and the central axis of fluorescent tube (7) and the axis of pitch of reflection shield are positioned at same plane;
The two ends, left and right of the upper surface of reflection shield (6) cover body have two feed-in mouths; Magnetron excitation cavity (5) is fixed with directly over each feed-in mouth;
Permanent magnet (1) is fixed on directly over described reflection shield (6) cover body, and permanent magnet (1) and described fluorescent tube (7) are on same straight line;
Permanent magnet containment vessel (2) is wrapped in top and the side of described permanent magnet (1).
2. a kind of microwave ultraviolet lamp based on electron cyclotron resonace principle according to claim 1, it is characterized in that, what described permanent magnet (1) adopted is Nd-Fe-B permanent magnet.
3. a kind of microwave ultraviolet lamp based on electron cyclotron resonace principle according to claim 1, it is characterized in that, the longitudinal cross-section of described reflection shield (6) cover body is oval half, and the longitudinal direction of reflection shield (6) cover body is major semiaxis, is laterally semi-minor axis.
4. a kind of microwave ultraviolet lamp based on electron cyclotron resonace principle according to claim 1, it is characterized in that, the inner surface of the cover body of described reflection shield (6) is coated with aluminum oxide film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520035709.5U CN204303753U (en) | 2015-01-19 | 2015-01-19 | A kind of microwave ultraviolet lamp based on electron cyclotron resonace principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520035709.5U CN204303753U (en) | 2015-01-19 | 2015-01-19 | A kind of microwave ultraviolet lamp based on electron cyclotron resonace principle |
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| Publication Number | Publication Date |
|---|---|
| CN204303753U true CN204303753U (en) | 2015-04-29 |
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|---|---|---|---|
| CN201520035709.5U Expired - Fee Related CN204303753U (en) | 2015-01-19 | 2015-01-19 | A kind of microwave ultraviolet lamp based on electron cyclotron resonace principle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172496A (en) * | 2018-01-31 | 2018-06-15 | 广州正虹科技发展有限公司 | A kind of photodissociation organic exhaust gas microwave plasma lamp |
| CN112515098A (en) * | 2020-12-10 | 2021-03-19 | 济南大学 | Green wheat ball and preparation method thereof |
-
2015
- 2015-01-19 CN CN201520035709.5U patent/CN204303753U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172496A (en) * | 2018-01-31 | 2018-06-15 | 广州正虹科技发展有限公司 | A kind of photodissociation organic exhaust gas microwave plasma lamp |
| CN112515098A (en) * | 2020-12-10 | 2021-03-19 | 济南大学 | Green wheat ball and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20160119 |
|
| EXPY | Termination of patent right or utility model |