CN2132378Y

CN2132378Y - Energy-saving ballast for fluorescent lamp

Info

Publication number: CN2132378Y
Application number: CN 92218016
Authority: CN
Inventors: 顾新东
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-30
Filing date: 1992-05-30
Publication date: 1993-05-05
Anticipated expiration: 2002-05-30

Abstract

The utility model discloses an energy saving fluorescent lamp ballast, which mainly comprises a resonant circuit which comprise a capacitor and a coil, a PTC resistor and a change-over switch. When the utility model is started, the high voltage generated by the resonant circuit is added with the two ends of a fluorescent lamp tube to cause that the fluorescent lamp is rapidly lightened for operation; after the fluorescent lamp is lightened, the resonant circuit can be stopped from working by the PTC resistor; the fluorescent lamp is provided with power supply of normal lighting voltage; that the change-over switch is disconnected and is closed can ensure that fluorescent lamps whose filament is not broken and fluorescent lamps with connected filament can be started for operation. The utility model has the advantages of high power factor, capability of starting without a starter, prolongation of the service life of fluorescent lamp tubes and utilization of old fluorescent lamps whose filament is broken.

Description

Energy-saving ballast for fluorescent lamp

The utility model relates to a kind of fluorescent lamp ballast.

At present, the fluorescent start circuit that extensively adopts mainly is the circuit that has starter.Because aspect such as starter manufacturing process, often make the fluorescent lamp can not the one-shot success, this has just reduced the useful life of fluorescent tube, and starter itself also is a consumable accessory, need often to change, this can result in hand cramps concerning being installed in high aerial light fixture.Therefore, people more welcome just can make the fluorescent lamp circuit of startup fast without starter, and the voltage-multiplying type electric ballast arises at the historic moment, and this ballast startability is good, but daylight light output decline is more, and the dark phenomenon of the bright end of an end can occur; Also have some to start circuit fast, but the structure more complicated, power factor (PF) is low.

The purpose of this utility model is to provide a kind of and saves starter, to the energy-saving daylight lamp ballast that waste and old fluorescent lamp still can utilize, power factor (PF) is high of fracture of wire.

In order to achieve the above object, the technical solution of the utility model is: when starting fluorescent lamp, the resonant circuit that utilization is made of coil, electric capacity and the series connection of PTC resistance, form high pressure at the fluorescent lamp two ends, make gas ionization in the fluorescent tube, lamp is lighted immediately, along with the electric current PTC resistance of flowing through, its resistivity increases to infinity rapidly, and resonant circuit quits work, and fluorescent lamp is by the power for illumination normal power supply; When filament of fluorescent lamp is disconnected, coil through filament and electric capacity and PTC resistance formation resonant circuit again through fluorescent tube other end filament and receive on the lighting circuit; To the fluorescent lamp of fracture of wire, coil is connected with electric capacity, PTC resistance by diverter switch K and is constituted resonant circuit and receive on the lighting circuit, and at this moment the input of fluorescent lamp one end and ballast joins, and the output of the other end and coil joins.In order to improve the power factor (PF) of ballast, incorporate an electric capacity at the input of ballast; In order to eliminate the high order harmonic component that fluorescent lamp work the time is produced, at the two ends of fluorescent tube and connect an electric capacity.

The utility model has the advantages that: the useful life of luminosity height, power and energy saving, prolonging lamp tube, the waste fluorescent lamp of fracture of wire still can use, just can realize the low pressure build-up of luminance without starter.

Below in conjunction with accompanying drawing the utility model is described in further detail

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

When the fluorescent lamp filament is not disconnected, diverter switch K _1-1, K _1-2Disconnect simultaneously, coil l connects with capacitor C 1 and PTC resistance through fluorescent lamp one end filament and constitutes resonant circuit through other end filament again, energising back filament is preheated, resonant circuit work simultaneously, form high pressure at the fluorescent tube two ends, make gas ionization in the fluorescent tube, lamp is lighted immediately and is worked, along with the electric current PTC resistance of flowing through, its resistivity increases to infinity rapidly, and resonant circuit quits work, and fluorescent lamp is by the normal illumination power voltage supply, fluorescent lamp is preheated the back at filament and starts, and can delay the aging speed of fluorescent tube; For the former days light modulation of fracture of wire, diverter switch K _1-1, K _1-2Closed simultaneously, coil l is through K _1-2With capacitor C 1, PTC resistance and K _1-1Series connection constitutes resonant circuit, be attempted by on the mains lighting supply, the input of fluorescent lamp one end and ballast joins, and the output of the other end and coil l is joined, energising back resonant circuit is worked immediately, directly form high pressure at the fluorescent tube two ends, make gas ionization in the fluorescent tube, fluorescent tube is promptly lighted and is worked, along with the electric current PTC resistance of flowing through, its resistivity increases to infinity rapidly, and resonant circuit quits work, and fluorescent lamp is by the normal illumination power voltage supply; Incorporate capacitor C 2 at the startup circuit, can improve the power factor (PF) of ballast; Capacitor C 3 is attempted by the two ends of PTC resistance and capacitor C 1 series arm, and this equivalence is attempted by the fluorescent tube two ends with capacitor C 3, the high order harmonic component that is produced in the time of can eliminating lamp works like this; Because being added in the voltage that the fluorescent-lamp tube two ends make fluorescent start and work is alternating voltage, thereby the dark phenomenon of the bright end of an end can not appear in fluorescent-lamp tube.

Claims

1, a kind of fluorescent lamp ballast, it is made of coil L, capacitor C 1, capacitor C 2 and capacitor C 3, it is characterized in that: it also has PTC resistance and diverter switch K, when filament of fluorescent lamp is disconnected, coil L through filament connect with capacitor C 1 and PTC resistance, again through fluorescent tube other end filament formation resonant circuit and receive on the lighting circuit; When filament of fluorescent lamp disconnected, coil L connected behind the formation resonant circuit by the closure of diverter switch K and receives on the lighting circuit with capacitor C 1 and PTC resistance, and an end of fluorescent tube links to each other with ballast one input, and the other end links to each other with the output of coil L.

2, fluorescent lamp ballast according to claim 1 is characterized in that capacitor C 2 is attempted by the input of ballast, and capacitor C 3 is attempted by the two ends by PTC resistance and capacitor C 1 series arm.