CN1290025A

CN1290025A - Sulfur lamp with waveguide discharge to excite microwave

Info

Publication number: CN1290025A
Application number: CN 99115180
Authority: CN
Inventors: 金行星
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-29
Filing date: 1999-09-29
Publication date: 2001-04-04

Abstract

A sulfur lamp with waveguide discharge to excite microwave is composed of magnetron to generate microwave energy, microwave exciting mechanism connected to magnetron and non-electrode bulb in the microwave cavity composed of rectangular waveguide and shielding metal net. Its advantages include simple structure, low cost, small size and light weight.

Description

Adopt waveguide discharge excitation microwave sulfur lamp device

The invention belongs to electrodeless electric light source device and make the field.

Present microwave sulfur lamp device, its typical structure as shown in Figure 1.Mainly by magnetron 1, exciter 2, microwave cavity (rectangular cavity H for example ₁₀₁, cylindrical H ₀₁₀, H ₁₁₁, H ₁₁₂Deng) or coaxial exciter 3 and electric power system 4, electrical micro-machine 7 etc. partly form.Wherein parts 3 contain parts such as electrodeless bulb 5, metallic shield net 6, speculum.Because parts 3 (microwave cavity or coaxial exciter) requirement on machining accuracy height, manufacturing expense is corresponding higher.Simultaneously, because the existence of 3 parts, it is many that volume, the weight of whole device are increased, and brings inconvenience to use.

The objective of the invention is to design a kind of microwave sulfur lamp device, make it to save the microwave cavity or the coaxial exciter of parts 3 among class such as Fig. 1, electrodeless bulb, gauze screen, speculum etc. are set directly on the exciter, realize the transmission and the excitation of microwave energy with minimum device.The volume and weight that reduces production costs and install.

The objective of the invention is to realize by following structure.

Mainly producing the microwave sulfur lamp device that magnetron, the microwave excitation mechanism that links to each other with magnetron of microwave energy and the bulb that places microwave cavity etc. are formed by obtaining the power supply power supply, microwave excitation mechanism is only linked to each other with magnetron by an end and end face short circuit and the other end are equipped with one section rectangular waveguide of metallic shield net adpting flange and constitute.Electrodeless bulb places the microwave cavity that is made of rectangular waveguide and metallic shield net.

After having adopted design as above, compared with prior art, saved the higher parts of requirement on machining accuracy such as microwave cavity, coaxial exciter, production cost of products, volume, weight are reduced.

Description of drawings is as follows.

Fig. 1 is the exemplary block diagram of existing microwave sulfur lamp device.

Fig. 2 is the partial sectional view of the embodiment of the invention.

Fig. 3 is the A-A cutaway view of Fig. 2.

Fig. 4 is the making alive V of institute on the magnetron _AKVariation diagram in time.

Below in conjunction with accompanying drawing structure of the present invention is described in further detail, claimed scope is not limited to embodiment itself.

By seeing among Fig. 2 and Fig. 3, magnetron 11, the microwave excitation mechanism that links to each other with magnetron and the compositions such as bulb 14 that place microwave cavity, microwave excitation mechanism is only linked to each other with magnetron 11 by an end and end face short circuit and the other end is equipped with one section rectangular waveguide 12 of metallic shield net adpting flange 16 constitutes; Electrodeless bulb 14 places the microwave cavity that is made of rectangular waveguide and metallic shield net 13.

The microwave energy that magnetron produces by the coaxial waveguide conversion, in exciter, produces H by the magnetron transmission antennas transmit in the rectangular waveguide of exciter ₁₀The microwave of modulus.At last, microwave is ended by metallic shield net 13.Form standing wave between gauze screen and exciter, the sulphur shiner in the bulb is encouraged by stationary field and luminous.

For making magnetron produce enough stability microwave energy, reduce optical flare, all can adopt the Switching Power Supply power supply between the anode of magnetron and negative electrode and the filament.As shown in Figure 4, the making alive V of institute on the magnetron _AKSubstantially be constant situation over time.

Embodiment 1

In the structure of Fig. 2 and Fig. 3, the magnetron that magnetron 11 adopts common microwave oven to use, be fixed on the rectangular waveguide 12 with screw, the polishing of aluminum rectangular waveguide inwall is silver-plated, the cross section is 76 * 44mm, the one end is by the aluminium sheet short circuit, and the other end is welded with ring flange 16, with tapping screw metallic shield net 13 is fixed on the flange.Bulb 14 is quartzy bead, is placed in the microwave cavity that is surrounded by exciter 12 and gauze screen 13 by quartz pushrod 17.Quartz pushrod 17 is connected with the rotating shaft of electrical micro-machine 18 by transition joint 19.Switching Power Supply adopts conventional microwave oven Switching Power Supply.

For making more light radiation, oxide-film speculum 15 is positioned on rectangular waveguide 12 inwalls with the polytetrafluoroethylene screw to space outerpace.The radius of curvature of speculum is 30-40mm, is tile, is end liner with the quartz plate, surface plating oxide-film, and reflected waveband is at visible light wave range.

The quartzy internal diameter φ 38mm of bulb, in be filled with the 1.6-2.0mg/c.c high purity sulphur, electrical micro-machine rotates bulb with the speed that per second 10 changes.With little magnetron of the electric fan of 20-30W and Switching Power Supply cooling.Gauze screen adopts cambered surface structure, makes the calotte shape in this example.

This routine microwave sulfur lamp adopts 220V, the 50Hz mains-supplied, and power consumption 1250W, microwave output 900W produces 120,000 lumen light intensity, little 95 lumens of light efficiency/W, optical flare＜5%.

Claims

1, adopts waveguide discharge excitation microwave sulfur lamp device, mainly producing magnetron, the microwave excitation mechanism that links to each other with magnetron of microwave energy and the bulb that places microwave cavity etc. by obtaining the power supply power supply forms, it is characterized in that microwave excitation mechanism is only linked to each other with magnetron by an end and end face short circuit and the other end is equipped with one section rectangular waveguide 12 of metallic shield net adpting flange constitutes; Electrodeless sulphur lamp 14 places the microwave cavity that is made of rectangular waveguide and metallic shield net.

2, employing waveguide discharge excitation microwave sulfur lamp device according to claim 1 is characterized in that, all adopts the Switching Power Supply power supply between the anode of magnetron and negative electrode and the filament.

3, employing waveguide discharge excitation microwave sulfur lamp device according to claim 1 is characterized in that, is provided with nonmetal speculum 15 in the rectangular waveguide inner chamber.

4, employing waveguide discharge excitation microwave sulfur lamp device according to claim 1 is characterized in that described metallic shield net is cambered surface structure.

5, employing waveguide discharge excitation microwave sulfur lamp device according to claim 3 is characterized in that speculum is the tile bending, and its radius of curvature is the 30-40 millimeter.