CN204303753U - A microwave ultraviolet lamp based on the principle of electron cyclotron resonance - Google Patents
A microwave ultraviolet lamp based on the principle of electron cyclotron resonance 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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- 230000005284 excitation Effects 0.000 claims abstract description 14
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 9
- 230000001954 sterilising effect Effects 0.000 abstract 1
- 238000004659 sterilization and disinfection Methods 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- -1 mercury ions Chemical class 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
Description
技术领域technical field
本实用新型属于微波无电极光源技术领域。The utility model belongs to the technical field of microwave electrodeless light sources.
背景技术Background technique
微波紫外灯是一种新型的高效无电极紫外光源。微波紫外灯的工作原理如下：首先微波源产生的高频率、高功率微波，通过磁控管激励腔，从反光罩的馈入口处进入由反光罩和金属屏蔽网组成的封闭式谐振腔中，在灯管内部(充有氩气和汞)产生较强的电磁场，先击穿灯管中的氩气使其放电。由于氩的亚压稳激励态能比汞的电离能略高，有助于产生潘宁效应，进而有效使汞发生电离，使其成为高能级汞离子，高能级汞离子在跃迁至低能级时，会向外辐射出紫外光。Microwave UV lamp is a new type of high-efficiency electrodeless UV light source. The working principle of the microwave ultraviolet lamp is as follows: First, the high-frequency and high-power microwave generated by the microwave source enters the closed resonant cavity composed of the reflector and the metal shielding net from the feeding port of the reflector through the magnetron excitation cavity. A strong electromagnetic field is generated inside the lamp tube (filled with argon and mercury), and the argon in the lamp tube is first broken down to make it discharge. Since the sub-pressure stable excited state energy of argon is slightly higher than the ionization energy of mercury, it helps to produce the Penning effect, and then effectively ionizes mercury, making it into high-energy mercury ions. When high-energy mercury ions transition to low energy levels , which emits ultraviolet light.
然而在现有微波紫外灯产品中，由于在灯的启动过程中，灯管上的微波能量并非均匀分布，而是集中在馈入口附近，只有少部分微波能量集中在灯管中间部分，导致在启动过程中，容易出现灯管在靠近馈入口部分先放电呈等离子态，灯管中间部分仍为气态，从而极大地延长了微波紫外灯的启动时间。而且，灯管在运行时，由于灯管中间部位能量较少，使得灯管中间部位的等离子体密度较低，导致灯管中间部位的发光效率低，影响了紫外固化的效果。However, in the existing microwave ultraviolet lamp products, since the microwave energy on the lamp tube is not evenly distributed during the lamp start-up process, but concentrated near the feeding port, only a small part of the microwave energy is concentrated in the middle part of the lamp tube, resulting in During the start-up process, it is easy for the lamp tube to discharge into a plasma state near the feed port, and the middle part of the lamp tube is still in a gaseous state, which greatly prolongs the start-up time of the microwave UV lamp. Moreover, when the lamp tube is in operation, due to the low energy in the middle part of the lamp tube, the plasma density in the middle part of the lamp tube is low, resulting in low luminous efficiency in the middle part of the lamp tube, which affects the effect of ultraviolet curing.
实用新型内容Utility model content
本实用新型为了解决现有的微波紫外线灯灯管中间部位启动时间长和发光效率低的问题，也是为了解决这种灯的紫外固化效果差的问题，提出了一种基于电子回旋共振原理的微波紫外灯。In order to solve the problem of long start-up time and low luminous efficiency in the middle part of the existing microwave ultraviolet lamp tube, and also to solve the problem of poor ultraviolet curing effect of this lamp, the utility model proposes a microwave based on the principle of electron cyclotron resonance. UV lamp.
一种基于电子回旋共振原理的微波紫外灯，它包括磁控管、磁控管激励腔和灯管，磁控管用于通过连通管将其发出的微波注入磁控管激励腔内；它还包括永磁体、永磁体保护壳、反光罩和金属屏蔽网；A microwave ultraviolet lamp based on the principle of electron cyclotron resonance, which includes a magnetron, a magnetron excitation cavity and a lamp tube, and the magnetron is used to inject the microwave emitted by it into the magnetron excitation cavity through a connecting tube; it also Including permanent magnet, permanent magnet protective shell, reflector and metal shielding net;
金属屏蔽网固定在反光罩的底部，金属屏蔽网和反光罩构成微波谐振腔；灯管固定在微波谐振腔内，且灯管的中心轴线与反光罩的横向轴线位于同一平面；The metal shielding net is fixed on the bottom of the reflector, and the metal shielding net and the reflector form a microwave resonant cavity; the lamp tube is fixed in the microwave resonant cavity, and the central axis of the lamp tube and the transverse axis of the reflector are on the same plane;
反光罩罩体的上表面的左右两端开有两个馈入口；每个馈入口的正上方固定有磁控管激励腔；There are two feeding ports on the left and right ends of the upper surface of the reflector body; a magnetron excitation cavity is fixed directly above each feeding port;
永磁体固定在所述反光罩罩体的正上方，且永磁体与所述灯管处于同一直线上；The permanent magnet is fixed directly above the reflector cover, and the permanent magnet is on the same straight line as the lamp tube;
永磁体保护壳包裹在所述永磁体的顶部及侧面。The permanent magnet protective shell is wrapped on the top and the side of the permanent magnet.
有益效果：本实用新型所述的一种基于电子回旋共振原理的微波紫外灯利用电子回旋共振的原理，通过在灯管中间部位中引入恒定磁场，来解决微波紫外灯的灯管中间部位启动时间长、发光效率低等问题。Beneficial effects: a microwave ultraviolet lamp based on the principle of electron cyclotron resonance described in the utility model uses the principle of electron cyclotron resonance to solve the problem of starting time of the middle part of the lamp tube of the microwave ultraviolet lamp by introducing a constant magnetic field into the middle part of the lamp tube. Long, low luminous efficiency and other issues.
永磁体放置在反光罩的外表面上，且永磁体与灯管位于同一直线上，反光罩上开有馈入口，磁控管发出的微波经磁控管激励腔和馈入口进入反光罩内，此时永磁体在灯管周围产生恒定磁场，该恒定磁场与进入反光罩内的微波偶合，使灯管内中间部位产生电子共振加速，从而使灯管中间部位能够在较短时间内启动，解决了微波紫外灯的灯管中间部位启动时间长、发光效率低等问题。The permanent magnet is placed on the outer surface of the reflector, and the permanent magnet and the lamp are located on the same straight line. There is a feed inlet on the reflector, and the microwave emitted by the magnetron enters the reflector through the magnetron excitation cavity and the feed inlet. At this time, the permanent magnet generates a constant magnetic field around the lamp tube, and the constant magnetic field couples with the microwave entering the reflector, causing electron resonance acceleration to be generated in the middle part of the lamp tube, so that the middle part of the lamp tube can be started in a short time, solving the problem The problem of long start-up time and low luminous efficiency in the middle part of the lamp tube of the microwave ultraviolet lamp is solved.
附图说明Description of drawings
图1为本实用新型所述的一种基于电子回旋共振原理的微波紫外灯的结构示意图；Fig. 1 is a schematic structural view of a microwave ultraviolet lamp based on the electron cyclotron resonance principle described in the present invention;
图2为图1的侧视图；Fig. 2 is the side view of Fig. 1;
图3为反光罩的焦点示意图。Figure 3 is a schematic diagram of the focal point of the reflector.
具体实施方式Detailed ways
具体实施方式一、参照图1和图2具体说明本实施方式，本实施方式所述的一种基于电子回旋共振原理的微波紫外灯，它包括磁控管4、磁控管激励腔5和灯管7，磁控管4用于将其发出的微波注入磁控管激励腔5内；它还包括永磁体1、永磁体保护壳2、反光罩6和金属屏蔽网8；DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 1. This embodiment will be specifically described with reference to FIGS. 1 and 2. A microwave ultraviolet lamp based on the principle of electron cyclotron resonance described in this embodiment includes a magnetron 4, a magnetron excitation cavity 5 and a lamp. Tube 7, magnetron 4 is used for injecting the microwave that it sends into the magnetron excitation chamber 5; It also includes permanent magnet 1, permanent magnet protective shell 2, reflector 6 and metal shielding net 8;
金属屏蔽网8固定在反光罩6的底部，金属屏蔽网8和反光罩6构成微波谐振腔；灯管7固定在微波谐振腔内，且灯管7的中心轴线与反光罩的横向轴线位于同一平面；The metal shielding net 8 is fixed on the bottom of the reflector 6, and the metal shielding net 8 and the reflector 6 form a microwave resonant cavity; the lamp tube 7 is fixed in the microwave resonant cavity, and the central axis of the lamp tube 7 and the transverse axis of the reflector are at the same flat;
反光罩6罩体的上表面的左右两端开有两个馈入口；每个馈入口的正上方固定有磁控管激励腔5；There are two feeding ports on the left and right ends of the upper surface of the reflector 6 cover body; a magnetron excitation cavity 5 is fixed directly above each feeding port;
永磁体1固定在所述反光罩6罩体的正上方，且永磁体1与所述灯管7处于同一直线上；The permanent magnet 1 is fixed directly above the cover body of the reflector 6, and the permanent magnet 1 is on the same straight line as the lamp tube 7;
永磁体保护壳2包裹在所述永磁体1的顶部及侧面。The permanent magnet protective shell 2 is wrapped on the top and side of the permanent magnet 1 .
本实施方式中，为了防止永磁体1产生的恒定磁场干扰磁控管4的正常工作，将永磁体保护壳2盖在永磁体1的顶部及其侧面。In this embodiment, in order to prevent the constant magnetic field generated by the permanent magnet 1 from interfering with the normal operation of the magnetron 4 , the permanent magnet protective case 2 is covered on the top and side surfaces of the permanent magnet 1 .
本发明的工作原理是：磁控管4发出的微波，经过磁控管激励腔5，从反光罩6上的馈入口进入由反光罩6和金属屏蔽网8组成的封闭式微波谐振腔中，进而点亮灯管7。永磁体1在灯管7的中间部位产生的恒定磁场与进入微波谐振腔内的微波偶合，使灯管7内中间部位产生电子共振加速，从而使灯管中间部位能够在较短时间内启动，并提高灯管7中间部位的等离子体密度，提高其发光效率。The working principle of the present invention is: the microwave that magnetron 4 sends, through the magnetron excitation chamber 5, enters in the enclosed microwave resonator cavity that is made up of reflector 6 and metal shielding net 8 from the feeding port on reflector 6, Then light the lamp tube 7 . The constant magnetic field generated by the permanent magnet 1 in the middle part of the lamp tube 7 is coupled with the microwave entering the microwave resonant cavity, so that the electron resonance acceleration is generated in the middle part of the lamp tube 7, so that the middle part of the lamp tube can be started in a short time, And increase the plasma density in the middle part of the lamp tube 7 to improve its luminous efficiency.
与传统的依靠变压器驱动的有电极紫外灯相比，本实用新型所述的微波紫外灯具有如下优点：1无电极污染；2紫外效率高，紫外光分量可达30％以上；3灯管较小，产生的红外功率较低，热辐射功率小；4使用寿命长，可达8000小时以上；5不存在电极腐蚀现象，光效稳定。Compared with the traditional ultraviolet lamp with electrodes driven by a transformer, the microwave ultraviolet lamp described in the utility model has the following advantages: 1. no electrode pollution; 2. high ultraviolet efficiency, and the ultraviolet light component can reach more than 30%; Small, the infrared power generated is low, and the thermal radiation power is small; 4 The service life is long, up to more than 8000 hours; 5 There is no electrode corrosion, and the light efficiency is stable.
电子回旋共振原理是指，当电子回旋频率等同于所使用的微波频率时，微波能量可以共振偶合给电子，发生电子的共振加速，从而使电子获得较高的能量去撞击中性粒子，使其电离。应用电子回旋共振原理，可以在较低的气压下产生高密度、高电离度和大体积均匀的等离子体，从而解决现有产品中存在的问题。电子回旋频率的表达式为：The principle of electron cyclotron resonance means that when the electron cyclotron frequency is equal to the microwave frequency used, the microwave energy can be resonantly coupled to the electrons, and the resonance acceleration of the electrons occurs, so that the electrons obtain higher energy to hit the neutral particles, making them ionization. Applying the principle of electron cyclotron resonance, high-density, high-ionization, and large-volume uniform plasma can be generated at a lower air pressure, thereby solving the problems existing in existing products. The expression for electron cyclotron frequency is:
ωce＝eB/me ω ce =eB/m e
其中，ωce为电子回旋频率，e为电子电荷量，B为外加恒定磁场，me为电子质量。Among them, ω ce is the cyclotron frequency of the electron, e is the electronic charge, B is the external constant magnetic field, and m e is the mass of the electron.
作为微波源的磁控管4发出的微波频率为2.45GHz，根据电子回旋频率的表达式可知，当外加恒定磁场B＝875Gs时，可以满足灯管内电子共振加速的条件。The microwave frequency emitted by the magnetron 4 as a microwave source is 2.45 GHz. According to the expression of the electron cyclotron frequency, when a constant magnetic field B=875Gs is applied, the condition of electron resonance acceleration in the lamp tube can be satisfied.
具体实施方式二、本具体实施方式是对具体实施方式一所述的一种基于电子回旋共振原理的微波紫外灯的进一步说明，本实施方式中，所述永磁体1采用的是钕铁硼永磁体。Specific embodiment 2. This specific embodiment is a further description of a microwave ultraviolet lamp based on the principle of electron cyclotron resonance described in specific embodiment 1. In this embodiment, the permanent magnet 1 is made of NdFeB permanent magnet. magnet.
具体实施方式三、本具体实施方式是对具体实施方式一所述的一种基于电子回旋共振原理的微波紫外灯的进一步说明，本实施方式中，所述反光罩6罩体的纵向横截面为椭圆形的一半，且反光罩6罩体的纵向为长半轴，横向为短半轴。Specific embodiment three. This specific embodiment is a further description of a microwave ultraviolet lamp based on the principle of electron cyclotron resonance described in specific embodiment one. In this embodiment, the longitudinal cross-section of the reflector 6 cover is Half of the ellipse, and the longitudinal direction of the reflector 6 cover body is the semi-major axis, and the horizontal direction is the semi-minor axis.
本实施方式中，根据实施方式一的内容，永磁体1固定在所述反光罩6的正上方，且永磁体1与所述灯管7处于同一直线上；根据椭圆的聚焦原理，可以保证灯管发出的光线经过反光罩内表面反射后聚焦于椭圆的第二焦点处，参见图3。In this embodiment, according to Embodiment 1, the permanent magnet 1 is fixed directly above the reflector 6, and the permanent magnet 1 and the lamp tube 7 are on the same straight line; The light emitted by the tube is reflected by the inner surface of the reflector and then focused on the second focal point of the ellipse, see Figure 3.
从反光罩纵向横截面来看，反光罩6罩体的纵向为长半轴，横向为短半轴。图3中U表示短半轴所在轴线，V表示长半轴所在轴线。Viewed from the longitudinal cross-section of the reflector, the longitudinal direction of the reflector 6 cover body is the major semi-axis, and the transverse direction is the minor semi-axis. In Fig. 3, U represents the axis of the minor semi-axis, and V represents the axis of the major semi-axis.
具体实施方式四、本具体实施方式是对具体实施方式一所述的一种基于电子回旋共振原理的微波紫外灯的进一步说明，本实施方式中，所述反光罩6的罩体的内表面喷涂有氧化铝薄膜。Embodiment 4. This embodiment is a further description of a microwave ultraviolet lamp based on the principle of electron cyclotron resonance described in Embodiment 1. In this embodiment, the inner surface of the cover body of the reflector 6 is sprayed With aluminum oxide film.
本实施方式中，反光罩6的内表面喷涂氧化铝薄膜，并呈光亮镜面特性，其中氧化铝薄膜可吸收部分灯管发出的热辐射分量，保证被辐照材料不会因温度过高而氧化。In this embodiment, the inner surface of the reflector 6 is sprayed with an aluminum oxide film, which has the characteristics of a bright mirror surface. The aluminum oxide film can absorb part of the heat radiation component emitted by the lamp tube, so as to ensure that the irradiated material will not be oxidized due to excessive temperature. .
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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 microwave ion lamp for photolysis of organic waste gas |
| CN112515098A (en) * | 2020-12-10 | 2021-03-19 | 济南大学 | Green wheat ball and preparation method thereof |
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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 microwave ion lamp for photolysis of organic waste gas |
| CN112515098A (en) * | 2020-12-10 | 2021-03-19 | 济南大学 | Green wheat ball and preparation method thereof |
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