CN2262164Y - Long life daylight lamp started by field excitation - Google Patents

Abstract

The utility model relates to a daylight lamp started by field excitation, which can prevent a lamp filament of the daylight lamp from breaking off and both end heads from becoming black. The lamp filament is electrified and preheated by four wires output by the existing electronic ballast, and only two wires which are correspondingly connected with a lamp tube of the filament, and each end head of the lamp tube which is in a short circuit through a conducting wire only educes a wire. The two wires are output by a field excitation starter with high frequency power after rectification of commercial power, wave filter and separation for oscillating power output. Every time, when the daylight lamp is turned on, the lamp filament is not impacted by impact current and is not preheated. The lamp filament is used for forming two electrodes with high frequency electromagnetic fields in the lamp tube after the daylight lamp is electrified. Thereby, the two problems that the lamp filament of the lamp tube is broken off, and the end heads of the lamp tube become black are solved, the lamp filament does not consume electric energy, and the power factor of the lamp filament is as high as 0.99 or more.

Description

The long-life daylight light fixture of field exciting build-up of luminance

This case application be a kind of utility model patent that utilizes the long-life daylight light fixture of high-frequency electromagnetic field excitation build-up of luminance.

At present, known daylight light fixture all adopts preheating, the illumination of heating fluorescent tube filament build-up of luminance.The moment impact electric current is big, filament bombardment opening.Even still have electric current to pass through filament behind the build-up of luminance.The heat that filament produces toasts the phosphor powder (containing adhesive glue) near the inwall of fluorescent tube two ends filament repeatedly, causes phosphor powder accelerated ageing, blackening on the inwall of termination, and wherein adhesive glue heats the charing blackening repeatedly.Like this fluorescent tube in use for some time, filament breaking, the lamp tube ends hair is black, and has to scrap in advance.More than two reasons, shortened life-span of fluorescent tube.Number during use that most of fluorescent tubes all do not reach national standard.Account for 40% according to the sample investigation fluorescent tube owing to what filament breaking was scrapped; What the termination blackout was scrapped accounts for 40%; What gas leakage and other reason were scrapped accounts for 20%.

The purpose of this utility model provides a kind of daylight light fixture that utilizes the electromagnetic field of high frequency to excite build-up of luminance, and this light fixture has solved the two large problems of current daylight light fixture fluorescent tube filament breaking and two ends blackout.

The purpose of this utility model is to realize like this, it be with electric ballast improve that field exciting starter, the vibration form produce on the filament that high frequency power output directly is added in the lamp tube ends head after straight, tube filament is with lead or short-circuit piece short circuit, the no power preheating, heat filament, each end of fluorescent tube is only drawn single line, be connected on arbitrarily respectively on the output 3,4 of field exciting starter, as shown in Figure 3.The electrical schematic diagram of field exciting starter as shown in Figure 1.Civil power AC220V50HZ transports to the input 1,2 of field exciting starter.Directly rectifying and wave-filtering is exported the direct voltage about 240V.This filter is a kind of special low-and high-frequency filter, C during charging ₄Through D ₆With C ₅Serial connection charge, C during discharge ₄, D ₅C ₆, D ₇Discharge respectively makes whole light fixture form capacitive load to improve power factor.Filament not power consumption again, so the power factor of this light fixture is up to more than 0.99.(homemade power factor meter survey), oscillator is by BG ₁, BG ₂And L ₁, L ₂, L ₃(being 4 circles) is same on the high frequency magnet ring of φ 10 * 5, its direction of winding such as Fig. 2, and circuits for triggering R ₁, C ₆, R ₃, D ₈Etc. formation.Input powers up the instantaneous overtime 32V of moment B point current potential, because of DB ₃Puncture voltage be 32V.Therefore circuits for triggering are instantaneous to BG ₂Base stage provides trigger voltage, R ₂Be BG ₂Load during starting of oscillation is through L ₁, L ₂, L ₃BG is given in coupling ₁Base stage provides a positive potential, makes BG ₁The beginning conducting after positive feedback repeatedly, forms stable oscillation stationary vibration.R ₅, R ₆Be negative feedback resistor, to stablize BG ₁, BG ₂The working point, R ₇, R ₈Be base stage current-limiting resistance, C ₈, C ₉For eliminating the base stage peak voltage, protection base stage, C ₁₁, C ₁₂Be capacitance, so that have only the high frequency voltage after the starting of oscillation, C on the tube filament ₁₂Undertake load 3 ends again and exchange ground connection, so that BG ₁With BG ₂Mid point A dividing potential drop 110V about, the frequency of oscillating voltage is between 50KHZ～80KHZ, L ₄For adjusting power output usefulness, magnetic core is an a bit of broadcast receiver bar magnet (being glued).Reach the power that the standard fluorescent tube needs to adjust power: 20W, 25W, 30W, 32W, 40W (power that does not comprise 2～3W that field exciting starter itself consumes).Protective circuit is by L ₅(around L ₄Skin be 1.5 circles), R ₄, C ₁₀, D ₁₀, D ₁₁, D ₁₂, R ₁₁, R ₁₂, R ₁₃, C ₁₅Form D ₁₁Threshold values be 3.2V, L when build-up of luminance and operate as normal ₅On induced voltage through D ₁₂Be lower than the threshold voltage of 3.2V after the halfwave rectifier filtering dividing potential drop, not conducting of controllable silicon, C at this moment ₁₀Through R ₄Be charged to 25V.In case the fluorescent tube access failure, open circuit or wrong short circuit, overvoltage or lamp tube service life arrive, build-up of luminance not, output high voltage increases sharply, this moment L ₅On induced voltage raise D after the rectifying and wave-filtering dividing potential drop ₁₁On obtain surpassing threshold values 3.2V voltage, make D ₁₁Puncture, give D ₁₀Control utmost point G one trigger current is provided, make D ₁₀Conducting, C ₁₀Through D ₁₀, R ₆, BG ₂Eb knot and R ₈, L ₂Discharge makes BG ₂Base stage adds C ₁₀Negative voltage on the electric capacity makes BG ₂End, this moment, A point current potential was about 240V.Work as C ₁₀After having discharged, D ₁₀D when the anode A current potential is crossed other ₁₀Return to cut-off state, this moment, circuits for triggering started again, and trigger generator is starting of oscillation again.If input voltage recovers normal or fault is got rid of, automatically with lamp tube starting.Protected field exciting starter to be unlikely overvoltage, overcurrent like this and damaged.

Field exciting starter is given the voltage that adds the high frequency power output after straight on the lamp tube ends filament leading foot, the obstructed overcurrent of filament, only as two electrodes launching electromagnetic field, so it can be with lamp lighting-up, mainly be that filament encourages in the civil power power frequency, the emitting electrons ability, high frequency power output voltage at field exciting starter output 50KHZ～80KHZ is added on two filaments, between two filaments, form the electromagnetic field of high frequency, filament is under the excitation of high frequency strong-electromagnetic field, electron emission ability strengthens, two filaments are opposite in each instantaneous phase, the electron cloud that overflows is high-speed motion under the effect of high frequency forceful electric power magnetic, excite mercury vapour emission X ray, thereby excite the phosphor powder luminous lighting.

Owing to adopted such scheme, the high frequency power output that produces with the field exciting starter vibration directly is added on two filaments after straight, filament lead short circuit, and obstructed overcurrent, so filament can not break, filament does not generate heat.The problem that the lamp tube ends hair is black is resolved, and has prolonged the useful life of fluorescent tube, all substantially exceeds the useful life of fluorescent tube GB useful life, is actually the decay life-span of phosphor powder and the decay life-span of filament emitting electrons ability the useful life of fluorescent tube.In addition owing to cancelled the starter of inductance type, filament lead short circuit, each end is only drawn single line, as long as tube lamp holder two leading foots and lamp socket have one to contact and get final product build-up of luminance, the loose contact phenomenon that the fluorescent lamp of making over occurs improves, reliability improves, as long as components and parts are carried out conscientious crash handling.In a single day daylight light fixture with the electric field excitation build-up of luminance installs like this, can non-maintaining one draw promptly bright.

Main technical characteristics: (1) power factor＞0.99 (2) economize on electricity, 30%～40% (3) operating voltage range: civil power AC100V～260V50HZ, but equal operate as normal.(4) useful life of prolongation fluorescent tube: homemade common fluorescent tube is all more than 10,000 hours.(5) non-maintaining, reliable over-voltage over-current protection arranged.(6) triple-frequency harmonics＜20%

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is an electrical schematic diagram of the present utility model

Fig. 2 is L in the electrical schematic diagram of the present utility model ₁, L ₂, L ₃The coiling direction, be 4 circles.

Fig. 3 be the utility model field exciting starter and civil power AC220V50HZ and with the connection layout of fluorescent tube.

Among Fig. 1, C ₁, L ₀, C ₂Pi type filter for input; D ₁～D ₄Be bridge rectifier; C ₃, C ₄, D ₅, D ₆, D ₇, C ₅Be the low-and high-frequency filter; R ₁, C ₆, R ₃, D ₈, L ₂, R ₈Be circuits for triggering; BG ₁, BG ₂, R ₂, C ₇, R ₅, R ₆, L ₁, L ₂, L ₃, R ₇, R ₈Be oscillating circuit; C ₈, C ₉Be protection BG ₁, BG ₂The elimination base stage peak voltage that is provided with; C ₁₁, C ₁₂Be capacitance; L ₄Use for adjusting power output; R ₄, C ₁₀, D ₁₀, D ₁₁, L ₅, D ₁₂, R ₁₁, R ₁₂, R ₁₃, C ₁₅Constitute an over-voltage over-current protection circuit, L ₅Around L ₄Skin, be 1.5 circles; D ₁₀Be one-way SCR; D ₁₁Be voltage-stabiliser tube, threshold values 3.2V, L ₄In magnetic core be a bit of of broadcast receiver bar magnet; C ₁₃, C ₁₄, R ₉, R ₁₀Be coupling circuit.

Among Fig. 2,1 is the coiling direction of φ 10 * 5 magnet rings, L ₁, L ₂, L ₃Be 4 circles, line is the installation flexible cord of φ 0.1 * 7.3.3 ' be L ₁, 2.2 ' be L ₃, 4.4 ' be L ₂

Among Fig. 3,1,2 are civil power AC220V50HZ input.3,4 ends and the lamp tube ends head lamp silk two line roots of drawing after with the lead short circuit are connected arbitrarily.The 5th, fluorescent tube, 6 is the end cap of fluorescent tube termination, and 7 is short-circuit piece, and 8 is field exciting starter, and 9 is the tube filament leading foot, and 10 is filament, and 11 is mercury vapour, and 12 is the phosphor powder on the tube inner wall.

Claims (3)

1. the long-life daylight light fixture of a field exciting build-up of luminance, it is to be made of field exciting starter and fluorescent tube, and field exciting starter is supplied with the II vibration power amplification of holding concurrently by I rectifying and wave-filtering output dc voltage, the vibration power amplifier voltage is by C ₁₁, L ₄Output circuit is supplied with fluorescent tube; IV is constituted by protective circuit.Four lines of existing electronic ballast output end adopt filament to add electric preheating, filament emitting electrons, and with the fluorescent tube build-up of luminance, and its principal character of field exciting starter is that output circuit is by C ₁₁, C ₁₂, L ₄And C ₁₃, C ₁₄Add equalizing resistance and constitute, output is two lines 3,4 only, are connected respectively on the filament of fluorescent tube, and two filaments are only as the pole plate of launching the electromagnetic field of high frequency, with the illumination of high-frequency electromagnetic field excitation fluorescent lamp build-up of luminance.

2. require the daylight light fixture of 1 described field exciting build-up of luminance according to profit, it is characterized in that the high frequency power output capacitance C of field exciting build-up of luminance ₁₁, C ₁₂, remove direct current.

3. according to claim 1, the daylight light fixture of field exciting build-up of luminance, the filament that it is characterized in that the fluorescent tube termination is all with lead or short-circuit piece short circuit.

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