CN2333140Y - Low voltage d. c. energy saving lamp - Google Patents

Abstract

The utility model relates to a low voltage d. c. energy saving lamp. The utility model is characterized in that the low voltage d. c. energy saving lamp is composed of a push-pull typed oscillation circuit (1) and a feedback network (6) which is connected to a lighting tube in series. The feedback network is series is connected to the lighting tube. The utility model gets a feedback signal from a series-wound loop. The utility model has the advantages of stable work, no blackening to the lighting tube, automatic protection, etc.

Description

The low-voltage direct electricity-saving lamp

The utility model is a kind of light fixture.

Traditional low-voltage direct light fixture (as the solar power generation light fixture of automobile lamp, outlying mountain area, wind power generation lamp etc.) adopts incandescent lamp mostly, luminous efficiency is extremely low, temperature rise is big during work, both wasted a large amount of electric energy, damages light fixture outer cover and corresponding accessory thereof because of temperature rise easily again.Also because former the carrying on as before on the circuit is in inefficient operating state, and lamp tube ends blackout aging phenomenon appearred to the low-voltage direct fluorescent lamp of Chu Xianing (as some automobile ceiling light, power failure Emergency daylight lamp etc.) in long-term work easily afterwards.

The purpose of this utility model provides a kind of high efficiency electric energy-saving light fixture (comprising fluorescent lamp, neon light etc.) of working under the low-voltage direct state, it has high light efficiency, more more energy-conservation under same brightness than conventional lamp, and the long-term work lamp tube ends is difficult for blackout.

The purpose of this utility model is to realize like this, adopt two (or equivalence is two) power tubes (containing devices such as transistor, field effect transistor, electron tube) to constitute the push-pull type oscillating circuit, low-voltage DC is transformed into high frequency (for the audio frequency) alternating current that is suitable for lamp works supplies lamp works, to overcome single the inefficient shortcoming of power tube operating circuit, also can prevent the lamp tube ends blackout.Simultaneously, the utility model also adopts the feedback network of connecting with load (fluorescent tube) operating state with stabilizing circuit, and the operating efficiency of optimum resonance with further raising circuit takes place in all cases for assurance and fluorescent tube; Since feedback network connect with load also can the fluorescent tube inefficacy fluorescent tube is not installed or unusual condition such as starter failure under circuit is quit work, protect the safety of components and parts.

Compare with conventional art, the utlity model has the luminous efficiency height, energy-saving effect is remarkable, can not make lamp tube ends blackout and prolonging lamp tube service life greatly, also has circuit abnormality and plurality of advantages such as protection automatically.

Accompanying drawing 1 is that block diagram is implemented in recommendation of the present utility model, and accompanying drawing 2 is a kind of concrete recommendation circuit of the present utility model.In the accompanying drawing 1,2,1 is oscillating circuit, the 2nd, and fluorescent tube; 3 is low-voltage dc power supply; 4,5 is power tube, the 6th, and the serial Feedback network, 7 is high frequency transformer; the 8th, the ballast inductance; 9 is resonant capacitance, and 10 is starting resistance, and 11 are the resistive element in the feedback; 12 is the capacity cell in the feedback network, and 13 are the protection diode.

Now 1,2 embodiment of the present utility model is described in conjunction with the accompanying drawings.In accompanying drawing 1, two (or equivalence is two) power tubes (4,5) are formed high-frequency generator (1) to produce the required voltage of lamp works jointly with high frequency transformer (7) and feedback network (6).The effect of inductance (8) and resonant capacitance (9) is to make fluorescent tube (2) pipeline start up by preheating.Since power tube (4, the 5) symmetrical operation of oscillating circuit (1), so circuit working is very stable, the efficient height, power tube is low in energy consumption, and temperature rise is little.Feedback network (6) is connected with fluorescent tube (2), once abnormal condition of lamp tube, series loop is opened circuit, and feedback network (6) loses feedback signal, and circuit quits work, and entire circuit is protected.In accompanying drawing 2, power tube (4,5) is typical high-power high-frequency triode, and circuit is provided with starting resistance (10) and protection diode (13), includes resistance (11) and electric capacity (12) in the serial Feedback network.

Claims (3)

1, the utility model is a kind of low-voltage direct electricity-saving lamp, is made of oscillating circuit (1) and fluorescent tube (2), it is characterized in that oscillating circuit (1) is made up of two power tubes (4,5) and serial Feedback network (6) etc.

2,, it is characterized in that oscillating circuit (1) is that two or equivalence are that two power tube (4,5) is formed push pull mode work according to the described electricity-saving lamp of claim 1.

3,, it is characterized in that serial Feedback network (6) and fluorescent tube (2) are in series, and obtain feedback signal from series loop according to the described electricity-saving lamp of claim 1.

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