CN2084704U

CN2084704U - Long life starter of fluorescent lamp

Info

Publication number: CN2084704U
Application number: CN 91201999
Authority: CN
Inventors: 李荣厚; 朱仁君; 李瑞新
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-02-08
Filing date: 1991-02-08
Publication date: 1991-09-11

Abstract

Disclosed is a long life starter of fluorescent lamp, belonging to light fitting accessories. The utility model is characterized in that a temperature compensator with negative temperature coefficient is connected with the loop of the cathode tungsten filament of a florescent lamp whose temperature coefficient is positive to reach the goal that the maximum value of surge current which flows through the tungsten filament at the moment when the electrical source of the long life starter of fluorescent lamp is switched on; therefore, excessive consumption of the emission material of cathode is avoided; the service life of a florescent lamp is improved.

Description

Long life starter of fluorescent lamp

The fluorescent lamp starter of lengthening the life is a kind of accessory of lighting.

Fluorescent lamp is a kind of general lighting source, its continuous useful life between 2000～3000 hours, the switch number of times of its life-span and fluorescent lamp, the time relationship of lighting of also promptly and at every turn turning on light is very big.If lighted three hours by 2500 hours if turn on light at every turn its average useful life continuously, then facts have proved and just have only about 1000 hours its useful life, be 40% of average useful life continuously.If shorten the time of turning on light and lighting again at every turn, then the life-span can sharply descend.Its reason just is; The tungsten filament coiling of the negative electrode of fluorescent lamp, its resistance has positive temperature coefficient, be that temperature is high more, resistance is big more, before turning on light, because it is under the room temperature condition, thereby its cathode resistor is lower, only is 9.5 ohm as 20 watts of fluorescent lamp its cathode resistors this moment, and when cathodal closing heats, cathode resistor will increase with the rising of self-temperature, and this moment, the anode resistance of 20 watts of fluorescent lamps was about 43 ohm.Thereby, the moment of energized (being generally several seconds zero point) negative electrode will be by a very strong impulse current (be about normal negative electrode heating current five times).The powerful impulse current of this strand will make cathodic sputtering go out more emissive material, thereby seriously damage the continuous useful life of fluorescent lamp, sometimes even can blow the negative electrode tungsten filament and cause fluorescent tube to damage at once.

In order to eliminate or to reduce when starting by the impulse current of negative electrode, prolong the useful life of fluorescent lamp, the utility model proposes a kind of novel fluorescent lamp starter of lengthening the life.

Feature of the present utility model is: a temperature compensator and the glow discharge tube with negative temperature coefficient is in series, use an anti-interference condenser and this series circuit parallel connection again, also can be only and the glow discharge tube parallel connection, two output terminations of this series-parallel circuit are to two electrodes that are installed on the base, and whole base then is installed in the shell of a sealing.

Use proof: this fluorescent lamp is lengthened the life the useful life that starter can improve fluorescent lamp significantly.

In order in conjunction with the embodiments the utility model to be done more detailed explanation below, now as follows employed accompanying drawing title of present specification and numbering brief introduction:

The circuit connection diagram of Fig. 1, the utility model and fluorescent lamp;

Fig. 2, actual installation figure of the present utility model.

Embodiment:

Ask for an interview Fig. 1.The 1st, glow discharge tube, 2 is the thermistors with negative temperature coefficient, the 3rd, anti-interference condenser, their threes have been connected into the fluorescent lamp start-up circuit of lengthening the life.The 4th, fluorescent lamp tube, the 5, the 6th, two electrodes of fluorescent lamp, the 7th, mains switch, the 8th, ballast.Supply voltage is added on 9,10 two ends fully when fluorescent lamp starting.The negative electrode heating current flows through thermistor and two ohmic tungsten cathodes successively.Because 5,6 have positive temperature coefficient, and 2 have negative temperature coefficient, thereby when room temperature, though 5,6 resistance is very little, because 2 resistance value is very big, thereby just limited the maximum of impulse current widely.After, along with the increase of time, though the resistance of thermistor descends along with the rising of temperature, but 5,6 resistance promptly increases along with the rising of temperature, thereby the variation of resistance value cancels out each other, and impulse current is weakened greatly even eliminates, thereby played the effect of lengthening the life and starting.If make 3 be in parallel by 2 and 1 series circuit of forming, its effect and process and above-mentioned circuit are basic identical.Wherein, capacitor has played an interference that is produced when eliminating the glow discharge tube switching.

The actual installation structure of this starter of lengthening the life is seen Fig. 2.Wherein 11 is glow discharge tubes, the 12nd, and thermistor, the 13rd, capacitor, the 14th, base, the 15th, shell, available aluminium or plastics are made.16,17 two electrodes then join with two tungsten cathodes of fluorescent lamp respectively.

Claims

1, a kind of fluorescent lamp starter of lengthening the life, it is characterized in that, temperature compensator and a glow discharge tube with negative temperature coefficient is in series, anti-interference condenser can with whole series circuit parallel connection, also can be only and the glow discharge tube parallel connection, two terminations of this series-parallel circuit are to two electrodes that are installed on the base, and whole base then is installed in the shell of a sealing.

2, according to the fluorescent lamp of claim 1 starter of lengthening the life, it is characterized in that said temperature compensator is a thermistor with negative temperature coefficient.