CN104637780A

CN104637780A - HED (high efficiency discharge) lamp with external electromagnetic field electrode

Info

Publication number: CN104637780A
Application number: CN201510054689.0A
Authority: CN
Inventors: 李俐劼; 王桂光; 王希天; 王建超
Original assignee: Us Integrated Science And Technology Ltd Of Lucky Star Of Shenzhen
Current assignee: Us Integrated Science And Technology Ltd Of Lucky Star Of Shenzhen
Priority date: 2015-01-31
Filing date: 2015-01-31
Publication date: 2015-05-20

Abstract

The invention discloses an HED (high efficiency discharge) lamp with an external electromagnetic field electrode. The interior of an electric arc tube in a lamp bulb is provided with a discharging cavity, the two ends of the discharging cavity are respectively connected with two electrode tubes, an electrode is arranged in each electrode tube, the tail end of each electrode tube is sealed, an electrode lead which is electrically connected with each electrode extends out of the tail end of the corresponding electrode tube, two magnetic coils are respectively wound at the outer walls of the two electrode tubes, one end of each magnetic coil is electrically connected with a lamp bulb outgoing line, and the other end of each magnetic coil is connected with an electrode lead of the opposite electrode tube. The HED lamp has the advantages that the starting voltage of the HED lamp is reduced, the starting is rapid, the lamp electric arc is stable, the loss of the lamp electrodes is reduced, and the service life of the electric arc tube of the HED lamp is prolonged.

Description

The HED lamp of external electromagnetic field plate

Technical field

The invention belongs to HED lamp technical field, be specifically related to the HED lamp of external electromagnetic field plate.

Technical background

In the life-span of existing HID lamp, depend primarily on the scaling loss degree of lamp arc electrodes, therefore under the stable prerequisite of pilot arc, how to reduce the scaling loss degree of electric arc to electrode, extend the HID lamp life-span, effective ways are as follows:

According to " joule lenzs law ", square being directly proportional of the temperature that lamp electrode is burnt by electric arc root and lamp current, so when lamp power is identical, promotes lamp arc voltage and just can reduce lamp current, just can reduce lamp electrode arc to electrode erosion.So create the HED lamp that modulating voltage is higher in HID lamp conventional industries.HED lamp is the abbreviation of English High Efficiency Discharge, means high efficiency gaseous discharge lamp.All advantages of its collection general gas flow discharge lamp, have specular removal, high color rendering index (CRI), long-life, warm start, energy-conservation, operating cost is low and applied environment advantage widely.Coordinate the most specular removal of special HED electric ballast more than 140LM/W, twice can be exceeded than the light efficiency of common quartz metal halide lamp, meet or exceed the light efficiency of ceramic gold-halogen lamp, higher than traditional incandescent lamp more than 10 times; Especially HED lamp sends the spectrum close to sunlight, and most high color rendering index (CRI) can more than 94, and the color of reduction scenery is more bright-coloured, truer; The maximum life of joining special electronic ballast can more than 12000 hours, and this is longer than the common quartz metal halide lamp life-span; Some specific occasion needs warm start, joins special electronic ballast HED and can realize this target; The energy consumption more than 30% is saved than conventional illumination sources; The longer replacement cycle, low power consumption cost and the price lower than LED; Than LED tenable environment high temperature, application widely, the fields such as the illumination of such as industrial and mineral and harbour, Sports lighting, commercial lighting, office lighting, road lighting.

But problem is also following, and the HED lamp that modulating voltage is higher is more difficult than the startup of traditional HED lamp, maintain HED lamp arc stability also more difficult.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of reduction HED lamp starting voltage, and starter is rapid, lamp arc stability, reduces lamp export license, extends the HED lamp of the external electromagnetic field plate in HED lamp electric arc tube life-span.

The present invention adopts following technology to solve the problems of the technologies described above:

The HED lamp of external electromagnetic field plate, have discharge cavity in electric arc tube in bulb, discharge cavity two ends connect two electrode tubes respectively, respectively have an electrode in two electrode tubes, two equal end seals of electrode tube, the contact conductor be electrically connected with electrode stretches out outside electrode tube end; The pipe outer wall of two electrode tubes is wound around two magnetic coils respectively; One end of each magnetic coil is electrically connected a bulb lead-out wire, the contact conductor of other end electrical connection opposite end electrode tube.

Halogen ball is also had in described discharge cavity.

The number of turn of described magnetic coil is no less than 3 circles.

Described magnetic coil adopts carrying magnetic martensitic stain less steel or pure iron to make.

Described magnetic coil is also as the mechanical support of electric arc tube, and the internal diameter of coil and shape and electrode tube outer wall match.

The invention has the advantages that:

Effectively can reduce HED lamp starting voltage, be beneficial to starter rapid, lamp arc stability; The electric arc termination of electrode is bombarded from electron ion, effectively reduces electrode erosion, effectively extend the HED lamp electric arc tube life-span.

Accompanying drawing explanation

Fig. 1 is the structural representation of the HED lamp of external electromagnetic field plate of the present invention.

In figure, 1: discharge cavity, 2: the first electrode tubes, 3: the first magnetic coils, 4: the first bulb lead-out wires, 5: the first electrodes, 6: the first contact conductors, 7: encapsulant, 8: the second electrode tubes, 9: the second magnetic coils, 10: the second bulb lead-out wires, 11: the second electrodes, 12: the second contact conductors, 13: halogen ball.

Embodiment

Below the specific embodiment of the present invention is described in detail, but does not form limiting the scope of the invention.

As shown in Figure 1, the HED lamp of external electromagnetic field plate, in bulb transparent ceramic material electric arc tube in have containing xenon formula high strength air pressure and sealing discharge cavity 1, discharge cavity 1 one end connects the first electrode tube 2, and the other end connects the second electrode tube 8; Have in first electrode tube 2 in first electrode 5, second electrode tube 8 and have the second electrode 11; The end of the first electrode tube 2 and the second electrode tube 8 seals with encapsulant 7 respectively; It is outer as the first contact conductor 6 that first electrode 5 is directly stretched out the first electrode tube 2 end by the present embodiment, the second electrode 11 stretched out the second electrode tube 8 end outer as the second contact conductor 12; It is outer as the first bulb lead-out wire 4 that bulb is directly stretched out in one end that the pipe outer wall of the first electrode tube 2 is wound around the first magnetic coil 3, first magnetic coil 3, and the other end is electrically connected the second contact conductor 12; It is outer as the second bulb lead-out wire 10 that bulb is directly stretched out in one end that the pipe outer wall of the second electrode tube 8 is wound around the second magnetic coil 9, second magnetic coil 9, and the other end is electrically connected the first contact conductor 6; Halogen ball 13 is also had in discharge cavity 1.

First magnetic coil 3 and the second magnetic coil 9 all adopt carrying magnetic martensitic stain less steel or pure iron to make, the number of turn is all no less than 3 circles, around must under prerequisite under should the number of turn mostly be, and wire is enough thick, be enough to support electric arc tube, tread flaking after the mould molding coiling that during making, employing is identical with electrode tube profile, then be enclosed within electrode tube, make magnetic coil can as the mechanical support of electric arc tube, enough mechanical strengths are still had under being operated in arctube walls high-temperature condition, be enough to the weight supporting whole electric arc tube, keep electric arc tube to stablize and be firm.

Due to the external magnetic coil of electrode tube; based on the law of electromagnetic induction; when lamp arc current flows through magnetic coil; a circle short circuit ring current must be equivalent in electric arc tube inwall induction formation; produce saturated electrons cloud continually and fill the air the termination surrounding electrode, the termination forming " electron cloud shield " guard electrode is bombarded from electron ion.

Distributed capacitance is there is by between electrode and magnetic coil, the voltage of this distributed capacitance, be exactly the voltage between fluorescent tube two electrode, based on square being directly proportional of electric field Coulomb force and capacitance voltage, before HED lamp starter, starter high voltage forms the Coulomb force of electrostatic field in electrode tube, and after HED lamp starter, the Lorentz force of a circle short circuit current in HED lamp current induction electrode pipe, order about the electron cloud that arc tube electrode is saturated and fill the air encirclement, formed " electron cloud shield ", realize the difficulty effectively reducing HED lamp starter, and be conducive to lamp arc stability.Sunglasses observable through electric welder's helmet contrasts electric arc when being magnetic coil, and be better than traditional HID lamp electric arc or general HED lamp electric arc, starting voltage reduces, and starter is rapid, and the smooth-going stability of electric arc is relatively good.

Claims

1. the HED lamp of external electromagnetic field plate, have discharge cavity in electric arc tube in bulb, discharge cavity two ends connect two electrode tubes respectively, respectively have an electrode in two electrode tubes, two equal end seals of electrode tube, the contact conductor be electrically connected with electrode stretches out outside electrode tube end; It is characterized in that, the pipe outer wall of two electrode tubes is wound around two magnetic coils respectively; One end of each magnetic coil is electrically connected a bulb lead-out wire, the contact conductor of other end electrical connection opposite end electrode tube.

2. the HED lamp of external electromagnetic field plate as claimed in claim 1, is characterized in that, also has halogen ball in described discharge cavity.

3. the HED lamp of external electromagnetic field plate as claimed in claim 1, it is characterized in that, the number of turn of described magnetic coil is no less than 3 circles.

4. the HED lamp of external electromagnetic field plate as claimed in claim 1, is characterized in that, described magnetic coil adopts carrying magnetic martensitic stain less steel or pure iron to make.