CN86209387U - Light-variable fluorescent lamp - Google Patents

Abstract

The utility model relates to the improvement of a working line matched with a fluorescent lamp. The utility model realizes the electricity-restricting glowing of a fluorescent lamp by utilizing a manual double-control switch (according to the sequence of closing, normally glowing, light reducing and closing) and by the method that capacitances are connected in series on an ordinary fluorescent lamp circuit, the interference to the working of a television set is decreased. The utility model has the advantages of lower noise and energy saving. The luminous efficiency of a lamp fitting is enhanced; simultaneously, the original ballast is reserved, so the lamp fitting can be used just as an ordinary fluorescent lamp.

Description

Light-variable fluorescent lamp

The utility model relates to the improvement that the allotment of labor of fluorescent lamp institute makes circuit.

In order to be suitable for seeing night the luminous environment requirement of TV, must reduce the brightness of fluorescent lamp, reduce the interference of fluorescent lamp to television set work.For this reason, must reduce the fluorescent lamp operating current.Prior art has:

(1) with the special-purpose ballast of switch reconfiguration light modulation;

(2) adopt the mode of the variable silicon controlled rectifier in the current lead-through angle that constitutes by series impedance;

(3) on daylight lamp circuit, be connected in series electric capacity to reach the luminous purpose of rationing the power supply.

Above method (one), (two) cost are higher, and method (three) luminosity can not arbitrarily be controlled.

" files such as electrotechnics handbook the 4th volume and U.S Patent 4082981 have reflection to prior art in (Japanese electric apparatus association).

The purpose of this utility model is to send less light with common fluorescent lamp, reduces the interference to television set work, reduces the noise that light fixture itself sends.

The key problem in technology that the utility model is implemented is the fluorescent lamp serial connection electric capacity to the adapted ballast, adjunction preheating (normal illumination at this moment) change over switch, and it can only be by the sequential loop connection of passs → normally luminous → dim light → pass.

Typical Route such as Fig. 1, its electric current calculate and use formula:

$I_m=\frac{V_m}{\sqrt{{\mathrm{(R}}_{}{\mathrm{＋\; R}}_L{)}^2\mathrm{+\; (\omega \; L}\frac{1}{\mathrm{\omega \; C}}{)}^2}}$

Wherein: ω L＜＜1/ (ω C)

I _m: maximum current (A);

V _m: maximum mains voltage (V);

R _Lamp: fluorescent tube internal resistance (Ω);

R _L: the ballast D.C. resistance;

ω: angular frequency, also represent with 2 π f;

C: adjunction capacitance (F);

L: the inductance value of ballast (H).

The utility model is compared with prior art products, and following advantage is arranged:

(1) reduced the interference of fluorescent lamp greatly, be apparent that the radio interference reduces greatly, has reduced the interference to broadcast receiver work on every side simultaneously most television set work;

(2) one lamps are dual-purpose, both can use as conventional fluorescent lamps, can reduce light output again and use;

(3) noise that sends of light fixture itself (being the vibration and the fluorescent tube vibration of ballast iron core) greatly reduces;

(4) cause day spectrum luminous environment under the TV situation to seeing, than using the incandescent lamp with constant power to cause red partially luminous environment more to allow the people feel soft comfortable, image color is true to nature;

(5) saving electric energy, mainly is the decline more originally of electrical power with the electrical power of fluorescent tube of ballast, than using the identical little fluorescent lamp power saving of electrical power when exporting with dim light more than 40%;

(6) make by adapted hysteresis ballast that leading circuit is regulated in power factor correction, short circuit current, line current is regulated into and regulate with supply voltage and to have superiority aspect the lamp current, kept simultaneously when general lighting, the hysteresis ballast is in the superiority of aspects such as ignition voltage, lamp current waveform and permission lamp voltage change again;

(7) prolonging lamp tube useful life, because the lamp current of dim light connection is very little, the volatilization of filament material is slow, is subjected to the influence of transient process impulse current little at switch moment filament, and through preheating, starter no longer moves in the starter process of dim light connection;

(8) ballast of adapted is the original fitting of fluorescent lamp.

Implement two examples:

(1) press Fig. 2 wiring, connect second grade on switch from about 10 seconds of the time of connecting first grade on switch, stable and uniform ground is luminous behind the tube starting, photochromicly becomes.At this moment power of lamp tube is about 6.1 watts, about 6.5 watts of total power consumption.Lamp is hung in 1.5 meters, color television set top, and during the general lighting connection, television image upwards rolls, and picture has 1/4th part torsional deformation, and distinguishable noise is arranged in the sound accompaniment.When adopting the dim light connection, image no longer upwards turns over, and picture has only 24 minutes one part torsional deformation, and the degree of distortion is light, can not differentiate the interference noise of lamp in the sound accompaniment.

(2) press Fig. 3 wiring, connect second grade on switch from time in about 10 seconds of connecting first grade on switch, stable and uniform ground is luminous behind the tube starting, photochromicly becomes, and at this moment power of lamp tube is about 8.6 watts, and total power consumption is about 9 watts.Lamp is hung in 1.5 meters, color television set top, and disturbed condition is example as above, just the interference the during illumination of general lighting and dim light all go up example slightly a little less than.

More than two examples to note and can not be transferred to lamp power below 4 watts, otherwise to prolong warm-up time and may put out certainly.

Claims (1)

1. A kind of variable light fluorescent lamp, it comprises fluorescent tube, starter, ballast, capacitor and preheating change over switch.It is characterized in that adding serial connection electric capacity shelves again on fluorescent tube and the circuit that ballast is connected.

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