Electrodeless ultraviolet germicidal lamp

Abstract

The invention discloses an electrodeless ultraviolet germicidal lamp which comprises a frame-shaped lamp tube, two power couplers and a high-frequency excitation source; a heat radiator comprises a base and a top cover and the upper end of the base is combined together with the top cover to form a complete circle; a magnetic ring comprises an upper semicycle and a lower semicycle which can be combined into a complete circle; the magnetic ring is arranged in the heat radiator and fixed through buckles on the base and the top cover of the heat radiator; a coil is wound at the bottom of the lower semi-circular magnetic ring, and the number of turns of the coil is set according to the demand of output powder; output ends of the high-frequency excitation source are respectively connected at the both ends of the coil, input ends of the high-frequency excitation source are connected with a power supply; blind pipes at the both ends of the lamp tube are loaded with amalgam, the lamp tube is filled with inert gas and the two short sides of the lamp tube are clipped in the upper semi-circular magnetic ring and the lower semi-circular magnetic ring of the power couplers. The invention solves the contradiction which cannot be solved by the electrode ultraviolet germicidal lamp and has the advantages of high efficiency, high power, wide power range, long service life, instant start, environmental-protection, wide applicable temperature range, simple manufacturing process, lower processing cost, and the like.

Description

1. Technical field: [0001] The invention relates to an ultraviolet germicidal lamp. 2. Background technology: [0002] The existing ultraviolet germicidal lamps all have electrodes (i.e. filaments). The quartz glass tube filled with argon and mercury vapor mixture or the glass tube through ultraviolet light is connected to the power socket through the ballast. It emits the characteristic spectral lines of argon and mercury, that is, ultraviolet light. Ultraviolet germicidal lamps with glass tubes that pass through ultraviolet rays have a simple production process and relatively low manufacturing costs, but they are far inferior to quartz germicidal lamps in terms of ultraviolet germicidal effects. But there are many disadvantages in the existing quartz germicidal lamp, 1, the cost is higher. The performance of quartz glass is very different from that of ordinary glass. The main reason is that the thermal expansion coefficient is different. The sealing cannot be made by ord...

AI Technical Summary

Problems solved by technology

Ultraviolet germicidal lamps with glass tubes that pass through ultraviolet rays have a simple production process and relatively low manufacturing costs, but they are far inferior to quartz germicidal lamps in terms of ultraviolet sterilization effects.

However, there are many disadvantages in the existing quartz germicidal lamps, 1. The cost is relatively high

The performance of quartz glass is very different from that of ordinary glass. The main reason is that the thermal expansion coefficient is different. The sealing cannot be made by ordinary high-automation manufacturing methods, and the electrode ultraviolet germicidal lamp is composed of multiple lamp parts. Formed, the processing process of each part is more complicated

This makes the production of quartz germicidal lamps unable to be scaled and mechanized, but can only be produced manually, resulting in higher costs

2. Short lifespan

(1) Since the expansion coefficient of the metal material of the electrode is not exactly the same as that of the quartz glass, a small air leak will occur at the sealing of the electrode after long-term use, resulting in the end of the life of the lamp

(2) The life of the lamp is short due to poor electrode treatment

The high temperature generated during the sealing process of the wick and the lamp tube of the ultraviolet germicidal lamp intensifies the high temperature oxidation of the filament, resulting in serious damage to the cathode. This is a fatal defect of the electrode ultraviolet germicidal lamp, which leads to the effective life of the electrode ultraviolet lamp Less than a few thousand hours, the average lifespan of better quality is generally only about 3000 hours

3. Severe light decay

Due to the high-temperature oxidation of the core part of the lamp tube during the processing process, the cathode has been damaged to varying degrees, resulting in a significant reduction in the cathode electron emission capability of the lamp tube. Can not achieve a strong bactericidal effect

4. Long startup time

Moreover, the quartz lamp tube of the existing ultraviolet germicidal lamp is only filled with argon gas. Once the tube wall temperature is high, its radiation intensity will drop. It can only be made into a low-power tube not higher than 100 watts, and cannot be applied to large On the power tube, and sterilization in many occasions requires high-power ultraviolet germicidal lamps, so the use of existing ultraviolet germicidal lamps is limited

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