CN2111614U - Double-tube fluorescent lamp - Google Patents

Abstract

The utility model relates to a fluorescent lamp, which comprises two lamp tubes which are connected in series and a ballast. The ballast adopts two groups of coils of which the tops and the ends are connected; a central tap is led out from the middle of the ballast; the ballast is connected with the two lamp tubes in series in an electrical source; the central tap is connected with the tandem point of the two lamp tubes by a power capacitor. The utility model has the advantages of simple circuit, low cost, reliable operation, quick starting, wide application range of voltage, long service life and remarkable effect of electricity saving.

Description

Double-tube fluorescent lamp

The utility model relates to a kind of fluorescent lamp.

Existing fluorescent lamp all adopts fluorescent tube of a ballast band, when room brilliancy need add a fluorescent tube inadequately again, then need join a cover ballast device again, and existing ballast is many for its coil turn of needs of current limliting, fluorescent lamp for 20W, 40W, the ballast number of turn is about 1300 circles, thereby power consumption is big, and cost is also high.In addition, existing fluorescent-lamp tube starting time is long, and influence by voltage is bigger, and when civil power is difficult to starter when low, also lack useful life.

The purpose of this utility model is exactly in order to address the above problem, and a kind of efficient energy-saving daylight double is provided.

Structure of the present utility model as shown in the figure.

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

Such as Fig. 1, the utility model includes two fluorescent tube Y₁、Y ₂, ballast ZL, fluorescent tube Y₁、Y ₂Two ends are connected to respectively starter S₁、S ₂, be characterized in that ballast ZL is two groups of coil L₁、L ₂, the number of turn of every group of coil is at 400-1200 circle (corresponding power is 60W-6W), two groups of coil L₁、L ₂Headtotail, centre cap is drawn in the centre, and ballast ZL one end is connected the other end and fluorescent tube Y by power switch K with the civil power live wire₁One end filament connects, fluorescent tube Y₁Other end filament and fluorescent tube Y₂One end filament is connected in series Y mutually₂Other end filament connects the civil power ground wire, and the centre cap of ballast ZL is by electric capacitor C and fluorescent tube Y₁、Y ₂Serial connection point connect.

After power switch K closure, electric current is by the L of ballast ZL₁Winding, electric capacitor C, fluorescent tube Y₂Filament is at starter S₂Two ends apply supply voltage and make it to begin glow discharge. Ballast ZL, fluorescent tube Y₂With starter S₂Form a closed-loop path, make fluorescent tube Y₂Filament obtain preheating. While starter S₂Because two contacts contacts, the loss of voltage between two contacts, glow discharge disappears and makes the two metal sheets shrinkage and disconnect, so produce transient pulse high pressure (V at ballast ZL two ends_L1＋V _L2). Simultaneously because the L of electric capacitor C and ballast ZL₁Winding forms the LC series circuit, capacitive reactance is about the twice of induction reactance, electric current approaches sinusoidal wave (can be comprehensive capacitive reactance), at this moment capacitor C two ends discharge voltage and ballast ZL pulse high pressure are superimposed upon (the 40W fluorescent lamp for two serial connections can reach more than the 300V) on the supply voltage, ionized inert gas and arc discharge impels fluorescent tube Y in the excitation fluorescent tube₁And Y₂Build-up of luminance is luminous respectively, again because capacitor C is the L that is connected in parallel on ballast ZL₂Winding and fluorescent tube Y₁On, form the contactless fast start circuit of impulse hunting, make Y₁Cold and hot filament all can be normally luminous, usually starter S₁Can save capacitor C among the figure₀Be additional bypass electric capacity, prevent the too high damage starter of discharge voltage.

The utility model adopts ballast tap and electric capacitor to form the LC series circuit, generation discharge pulse high pressure starts fluorescent tube fast makes it luminous respectively, circuit is carried out power factor compensation, make the power factor (PF) cos φ of entire circuit by common daylight double (is example with 40W) circuit 0.5 rise to cos φ ≈ 1, improved power factor (PF).Specifically be calculated as (being measured data):

Common two-tube 40W fluorescent lamp:

P _Always=40W * 2+8W * 2, V=220V, I _Always=0.41A * 2

The power factor (PF) of common daylight double then:

Cos φ=(P _Always)/(VI _Always)=(80+16)/(220 * 0,82) ≈ 0.53

And the power factor (PF) of daylight double of the present utility model is:

P _Always=40W * 2+8W, V=220V, I _Always=0.4A

Cos φ=(P _Always)/(VI _Always)=(80+8)/(220 * 0.4)=88/88=1

In the utility model actual measurement, circuit total current I _AlwaysBe about about 400mA, and fluorescent tube Y ₁, Y ₂Operating current be about 410mA, (ministry standard 40W tube filament electric current is 410 ± 35mA), compares with common daylight double, and power saving rate is about 50% to meet normal instructions for use.

Power saving rate=(ordinary lamps input power-energy-saving lamp input power)/(ordinary lamps input power) * 100%

＝ (220×0.41×2－220×0.4)/(220×0.41×2) ×100％

＝ 92.4/180.4 ×100％＝51×100％≈50％

Electrical efficiency of the present utility model is brought up to about 90%, that is: by 80% of common daylight double

For common 40W daylight double, its electrical efficiency:

η＝ (40×2)/(40×2＋8×2) ×100％＝83.3％，

For daylight double of the present utility model, its electrical efficiency

η＝ (40×2)/(40×2＋8) ×100％＝90.9％

The utility model removes in the daylight double light fixture that is well suited for using at present, also be adapted at many big quantity and use the occasion of fluorescent lamp lighting, as factory, school, shop, station, harbour, hospital, office building etc., has good economic use value, power savings is also more remarkable with the increase of fluorescent tube amount, if every two adjacent single tube daylights can circuit I I ' with II II ' locate to make connector to be connected, be convenient to popularize, install and keep in repair.The utility model reliable operation is as fluorescent tube Y ₁The bad brightness in the same old way of filament does not subtract as long as pipe is not bad, has both made fluorescent tube Y ₁Damage does not work, Y ₂But illuminate.

The utility model power savings is remarkable, and circuit is simple, and cost descends, reliable operation, and starter is fast, and the voltage adaptation scope is wide, at 180V-250V normal fast starting all, the luminous efficiency height, light is stable, the prolongation in service life, economic benefit is obvious.

Claims (1)

1, a kind of efficient energy-saving daylight double, it includes two fluorescent tube Y ₁, Y ₂, ballast ZL, fluorescent tube Y ₁, Y ₂Two ends are connected to starter S respectively ₁, S ₂, it is characterized in that ballast ZL is two groups of coil L ₁, L ₂, the number of turn of every group of coil is enclosed at 400-1200, two groups of coil L ₁, L ₂Headtotail, centre cap is drawn in the centre, and ballast ZL one end is connected the other end and fluorescent tube Y by mains switch K with the civil power live wire ₁One end filament connects, fluorescent tube Y ₁Other end filament and fluorescent tube Y ₂One end filament serial connection, Y ₂Other end filament connects the civil power ground wire, and the centre cap of ballast ZL is by electric capacitor C and fluorescent tube Y ₁, Y ₂Serial connection point connect.