CN2686274Y

CN2686274Y - Special energy-saving lamp for DC

Info

Publication number: CN2686274Y
Application number: CN 200420043331
Authority: CN
Inventors: 李金英; 张著明; 林日和
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-03-08
Filing date: 2004-03-08
Publication date: 2005-03-16
Anticipated expiration: 2014-03-08

Abstract

The utility model discloses a special energy-saving lamp for DC. The past energy-saving lamp for DC adopts the monocrystal oscillation circuit, and as a result, the service life of the light pipe is not long; the starting under low temperature and low power is unreliable, which also affects the service life. The utility model the secondary coil of a transformer T on a push-pull oscillation circuit is connected in series with a capacitance C3 and a lamp DG, and the resistance value of an intelligent composite resistance PTC connected among the filament of the lamp DG and compounded by a voltage-sensitive resistance and a thermal resistance is gradually increased, and the end voltage is gradually raised following the extension of the preheat time, and as a result, the voltage added on both ends of the lamp DG is raised to start the lamp DG. After the lamp DG is started, the resistance value of the intelligent composite resistance PTC alters following the alteration of the temperature and the time, but always maintains to be flowed over by a low current. Thus, the end voltage of the lamp DG is always ensured to maintain constant, so that the lamp DG is not subjected to the external impact when working to ensure the stability and extend the service life of the lamp DG. The utility model is widely suitable to various emergency lighting and energy-saving lighting of solar energy, wind energy, etc.

Description

Direct current energy-saving lamp

Technical field

The utility model relates to a kind of electricity-saving lamp, particularly a kind of direct current energy-saving lamp.

Background technology

Because the DC power saving lamp mainly is to rely on dry cell to power, save the energy, easy to use, thereby be widely used in emergency lighting, solar energy, in the light-source system of the direct current supply of energy-conservation illumination such as wind energy, particularly for field worker, the resident in the herdsman of outlying mountain area and the area that usually has a power failure is convenient especially, but because general DC power saving lamp all is to adopt the monocrystal oscillating circuit, band twin coil preheating is arranged or be not with the branch of preheating, not with preheating since rush of current big, thereby the useful life of light pipe is not long, and need preheating, since unreliable when low temperature and small-power start, also can influence its useful life.

Summary of the invention

At the problems referred to above, the utility model provides the direct current energy-saving lamp of a kind of low-voltage pipeline start up by preheating, stable performance.

The technical scheme that its technical problem that solves the utility model adopts is:

Direct current energy-saving lamp, comprise DC power supply and fluorescent tube, the positive pole of DC power supply is serially connected with diode D1, filter capacitor C1 just is being attempted by power supply, between the negative pole, inductance L 1 one ends link to each other with the link of diode D1 and filter capacitor C1, the other end and resistance R 1, R2, and the link of transformer T links to each other, the end of the other end of resistance R 2 and instrument transformer T1 inserts the base stage of triode BG2 jointly, the other end of resistance R 1 is connected the base stage that triode BG1 is inserted in the back with the other end of instrument transformer T1, triode BG1, the emitter of BG2 is connected on the negative pole of DC power supply, triode BG1, be connected to capacitor C 2 between the collector electrode of BG2, capacitor C 2 is attempted by on the primary coil T3 of transformer T, resistance R 1 is attempted by on the primary coil T2 of transformer T by the collector electrode of triode BG1, by inductance L 1, resistance R 1, R2, instrument transformer T1, triode BG1, BG2, capacitor C 2, the common push-pull type oscillating circuit of forming of transformer T is attempted by power positive cathode, be serially connected with capacitor C 3 and fluorescent tube DG on the secondary coil of transformer T on the push-pull type oscillating circuit, between the filament of fluorescent tube DG and be connected to the Intelligent Composite resistance PTC that is composited by piezo-resistance and thermistor.

The beneficial effects of the utility model are: because the utility model adopts the push-pull type oscillating circuit, be connected between the filament of fluorescent tube DG, can be by the Intelligent Composite resistance PTC that piezo-resistance and thermistor are composited along with the lengthening of low-temperature prewarming time, resistance progressively increases, terminal voltage increases gradually, thereby make the voltage that is added in fluorescent tube DG two ends raise, start fluorescent tube DG, after fluorescent tube DG starts, the resistance value of Intelligent Composite resistance PTC can change with the change of temperature and time, but always having kept little electric current flows through, thereby total energy guarantees that the terminal voltage of fluorescent tube DG remains unchanged, make fluorescent tube DG can not be subjected to extraneous impact at work, guarantee the stability of fluorescent tube DG and prolong its useful life.

Description of drawings

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

Fig. 1 is an operation principle circuit diagram of the present utility model.

Embodiment

With reference to Fig. 1, direct current energy-saving lamp, comprise DC power supply and fluorescent tube, the positive pole of DC power supply is serially connected with diode D1, filter capacitor C1 just is being attempted by power supply, between the negative pole, inductance L 1 one ends link to each other with the link of diode D1 and filter capacitor C1, the other end and resistance R 1, R2, and the link of transformer T links to each other, the end of the other end of resistance R 2 and instrument transformer T1 inserts the base stage of triode BG2 jointly, the other end of resistance R 1 is connected the base stage that triode BG1 is inserted in the back with the other end of instrument transformer T1, triode BG1, the emitter of BG2 is connected on the negative pole of DC power supply, triode BG1, be connected to capacitor C 2 between the collector electrode of BG2, capacitor C 2 is attempted by on the primary coil T3 of transformer T, resistance R 1 is attempted by on the primary coil T2 of transformer T by the collector electrode of triode BG1, by inductance L 1, resistance R 1, R2, instrument transformer T1, triode BG1, BG2, capacitor C 2, the common push-pull type oscillating circuit of forming of transformer T is attempted by power positive cathode, be serially connected with capacitor C 3 and fluorescent tube DG on the secondary coil of transformer T on the push-pull type oscillating circuit, between the filament of fluorescent tube DG and be connected to the Intelligent Composite resistance PTC that is composited by piezo-resistance and thermistor.Because the utility model is exclusively used in the work system that dry cell low-voltages such as adopting 6V or 12V starts, for preventing that the user is when installing battery, power positive cathode is installed wrong, and cause the whole system short circuit, so that burn fluorescent tube DG or other electron component, the utility model has been connected in series an anti-reverse short-circuit protection diode D1 at the positive pole of power supply, guarantees that whole system can not start work when mistake appears in battery plus-negative plate, thereby protects whole work system; Filter capacitor C1 is attempted by the two ends of the power positive cathode of push-pull type oscillating circuit, plays anti-interference effect, guarantees the stability of whole work system; And the push-pull type oscillating circuit of being made up of jointly inductance L 1, resistance R 1, R2, instrument transformer T1, triode BG1, BG2, capacitor C 2, transformer T is attempted by power positive cathode, guarantee that but whole work system low-temperature prewarming, low-voltage start, of a specified duration with the longer service life that guarantees fluorescent tube DG; In addition, owing to be connected between the filament of fluorescent tube DG, the Intelligent Composite resistance PTC that is composited by piezo-resistance and thermistor is during along with cold-starting, the lengthening of warm-up time, resistance can progressively increase, terminal voltage also can increase gradually, at this moment, the voltage that is added in fluorescent tube DG two ends raises, reach the rated voltage of fluorescent tube DG, fluorescent tube DG is activated, after fluorescent tube DG starts, owing to Intelligent Composite resistance PTC is composited by piezo-resistance and thermistor, though resistance value can change with the change of temperature and time, but can keep stable little electric current flows through, thereby total energy guarantees that there is enough stable voltage at the two ends of fluorescent tube DG, makes fluorescent tube DG can not be subjected to extraneous impact at work, guarantees the stability of fluorescent tube DG and prolongs its useful life.

Claims

1, direct current energy-saving lamp, comprise DC power supply and fluorescent tube, the positive pole of DC power supply is serially connected with diode D1, filter capacitor C1 just is being attempted by power supply, between the negative pole, inductance L 1 one ends link to each other with the link of diode D1 and filter capacitor C1, the other end and resistance R 1, R2, and the link of transformer T links to each other, the end of the other end of resistance R 2 and instrument transformer T1 inserts the base stage of triode BG2 jointly, the other end of resistance R 1 is connected the base stage that triode BG1 is inserted in the back with the other end of instrument transformer T1, triode BG1, the emitter of BG2 is connected on the negative pole of DC power supply, triode BG1, be connected to capacitor C 2 between the collector electrode of BG2, capacitor C 2 is attempted by on the primary coil T3 of transformer T, resistance R 1 is attempted by on the primary coil T2 of transformer T by the collector electrode of triode BG1, by inductance L 1, resistance R 1, R2, instrument transformer T1, triode BG1, BG2, capacitor C 2, the common push-pull type oscillating circuit of forming of transformer T is attempted by the two ends of power positive cathode, be serially connected with capacitor C 3 and fluorescent tube DG on the secondary coil of transformer T on the push-pull type oscillating circuit, it is characterized in that between the filament of fluorescent tube DG and be connected to Intelligent Composite resistance PTC.

2, direct current energy-saving lamp according to claim 1 is characterized in that Intelligent Composite resistance PTC is the multiple tube resistance that is composited by piezo-resistance and thermistor.