CN2145491Y - Initiate preheater for fluorescent lamp - Google Patents
Initiate preheater for fluorescent lamp Download PDFInfo
- Publication number
- CN2145491Y CN2145491Y CN 92219487 CN92219487U CN2145491Y CN 2145491 Y CN2145491 Y CN 2145491Y CN 92219487 CN92219487 CN 92219487 CN 92219487 U CN92219487 U CN 92219487U CN 2145491 Y CN2145491 Y CN 2145491Y
- Authority
- CN
- China
- Prior art keywords
- preheater
- fluorescent lamp
- lamp
- thermistor
- open circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model relates to an initiate preheater for fluorescent lamp. The preheater has a positive temperature coefficient and also has a curie point or a thermal resistor of the switch temperature, and is connected in parallel to a main oscillation capacitance of the electronic ballast, which is connected in series between two filaments of the fluorescent lamp. At the initial stage of starting the lamp, the preheater is in a low-impedance state, amplitude limiting the open circuit voltage and heating the filaments via the oscillating current; at the middle and later time after starting the lamp, the resistance rises rapidly to make the open circuit voltage amplify, and then the lamp tube is lightened by using of not very high open circuit voltage; at last the preheater is in a high-impedance state and exits the running. The utility model has simple structure, and can reliably protect the filaments and electron emission matter on the surface, prolonging the service life of the lamp tube obviously.
Description
The utility model is a kind of fluorescent lamp starting preheater.
Compare with inductance type ballast, electronic ballast for fluoresent lamp has efficiently, economizes on electricity, no buzzer, no stroboscopic sense and can low voltage starting etc. advantage.Particularly answer lamp electronic ballast, with low cost, have universal bright prospects.But common electric ballast belongs to quick startup formula more, fluorescent lamp then almost all belongs to the preheating cathode type, owing to electric ballast without preheating function forces fluorescent lamp cold start-up under too high open circuit voltage peak value, this just causes the too fast so that sputter of the electronic emitting material evaporation on filament surface easily, comes off, lamp tube ends is turned black too early, the lost of life.
Task of the present utility model is; on common single, multi-lamp electric ballast, install a kind of fluorescent lamp starting preheater additional; when fluorescent lamp starting; at first through the time-delay of one section preheating filament; and then fluorescent tube is lighted with not too high open circuit voltage; the electronic emitting material on protection filament and surface thereof, prolonging lamp tube service life.
Of the present utility model being characterised in that: the fluorescent lamp starting preheater has one and positive temperature coefficient is arranged and have Curie point or the thermistor of switch temperature, this thermistor other impedance components of can connecting, this thermistor or this thermistor are with after other impedance components are connected in series, still can and connect capacity cell or big resistance resistance, the two ends of preheater link to each other with the two ends that are serially connected in the main oscillations electric capacity between two filaments of fluorescent lamp of electric ballast respectively.
Below, solution of the present utility model is described in conjunction with the accompanying drawings.
Be fluorescent lamp starting preheater of the present utility model in the chain-dotted line frame A in the accompanying drawing 1, surplus is an electronic ballast for fluoresent lamp and the closely related part of preheater of the present utility model.Positive temperature coefficient is arranged among the preheater A and have Curie point or the thermistor of switch temperature, by having positive temperature coefficient and exist the semiconductor ceramic material PTC of Curie point to serve as, the PTC two ends directly or be connected in series behind other impedance components with electric ballast be serially connected in Filament of fluorescent lamp R
1With R
2Between the two ends D of main oscillations capacitor C link to each other with E, PTC or PTC still can and connect electric capacity and big resistance resistive element with after other impedance components are connected in series.
The curve that accompanying drawing 2 changes with himself temperature T for the resistivity q of PTC, accompanying drawing 3 is depicted as the fluorescent lamp starting stage open circuit voltage U that adapted adds the electric ballast of preheater
1Along with the passing of time t changes corresponding to PTC resistivity q and the waveform that changes.At the beginning of the electric ballast energising, oscillating current is through filament R
1, R
2Flow to main oscillations capacitor C and preheater A respectively, PTC begins to heat up.PTC rises to Curie point or switch temperature T in its temperature T
bBefore, though its resistivity q slightly descends, its resistance shows as a constant R that numerical value is less substantially
25Because PTC is in parallel with C, thereby LCR vibration branch road impedance and the equivalent resistance at this moment that is in series by inductance, electric capacity and filament etc. is all bigger, thereby the quality factor q value is less, rises to T in the temperature T of PTC
bTime t before
bIn, open circuit voltage U
1Amplitude is less and more stable, and oscillating current is also less and to filament R
1And R
2Heating.Along with the passing of time t and the accumulation of PTC heat, the temperature T of PTC meets and exceeds its Curie point or switch temperature T
b, the resistivity q of PTC skyrockets, and the impedance and the equivalent resistance of LCR branch road are die-offed, and the quality factor q value sharply increases, open circuit voltage U
1Amplitude more and more higher, preheat curent is increasing, preheating is quickened.Through width is t
D1Warm-up time, the temperature T of PTC rises to quite high T
P, resistivity q is corresponding very high, this moment open circuit voltage U
1There is a higher peak value and fluorescent tube is lighted.After fluorescent tube is lighted, the voltage U of lamp tube ends
1Go down after a rise to the normal working voltage of fluorescent tube.At this moment still have the very little one part of current PTC that flows through, the temperature T of PTC and then rise to T
N, resistivity q increases to maximum, and preheater A is equivalent to open circuit and out of service, no longer LCR vibration branch road is exerted an influence.
Open circuit voltage U when accompanying drawing 4 is depicted as adapted and does not have the fluorescent lamp cold start-up of electric ballast of preheat function
2Waveform.Can find out significantly that the fluorescent lamp that adapted adds the electric ballast of preheater A in the accompanying drawing 3 is being lighted t constantly
D1Crest voltage, the fluorescent lamp that is significantly less than the electric ballast of adapted without preheating function in the accompanying drawing 4 is being lighted t constantly
D2Crest voltage.As seen, preheater of the present utility model has significant protective effect to the Filament of fluorescent lamp of adapted electric ballast and the electronic emitting material on surface thereof, can prolong the life-span of fluorescent lamp significantly.
Claims (2)
1, a kind of fluorescent lamp starting preheater A that is applicable to the single, multi-lamp electric ballast, it is characterized in that: preheater A has one and positive temperature coefficient is arranged and have Curie point or the thermistor of switch temperature, this thermistor can be connected in series other impedance component, after this thermistor or this thermistor are connected in series other impedance components, still can and connect capacitor and big resistance resistance, the two ends of preheater A respectively with electric ballast be serially connected in two filament R of fluorescent lamp
1With R
2Between the two ends D of main oscillations capacitor C link to each other with E, preheater A can be an one with Design of Digital Ballast both, also can design at electric ballast externally, or was installed in a container preferably in metal such as the aluminum container, two terminals of A are drawn, link to each other with E with D respectively.
2, according to the fluorescent lamp starting preheater A of claim 1, it is characterized in that: among the described preheater A positive temperature coefficient is arranged and have Curie point or the thermistor of switch temperature, by having positive temperature coefficient and existing the semiconductor ceramic material PTC of Curie point to serve as.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92219487 CN2145491Y (en) | 1992-07-24 | 1992-07-24 | Initiate preheater for fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92219487 CN2145491Y (en) | 1992-07-24 | 1992-07-24 | Initiate preheater for fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2145491Y true CN2145491Y (en) | 1993-11-03 |
Family
ID=33766720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92219487 Expired - Fee Related CN2145491Y (en) | 1992-07-24 | 1992-07-24 | Initiate preheater for fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2145491Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401858C (en) * | 2002-10-31 | 2008-07-09 | 株式会社村田制作所 | Fluorescent lamp lighting device |
| WO2010102431A1 (en) * | 2009-03-12 | 2010-09-16 | Liao Yung Fa | Energy-saving fluorescent lamp apparatus |
| CN102789893A (en) * | 2011-05-14 | 2012-11-21 | 欧阳施孝 | Dedicated Capacitor for fluorescent lamp preheating luminance starting |
-
1992
- 1992-07-24 CN CN 92219487 patent/CN2145491Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401858C (en) * | 2002-10-31 | 2008-07-09 | 株式会社村田制作所 | Fluorescent lamp lighting device |
| WO2010102431A1 (en) * | 2009-03-12 | 2010-09-16 | Liao Yung Fa | Energy-saving fluorescent lamp apparatus |
| CN102789893A (en) * | 2011-05-14 | 2012-11-21 | 欧阳施孝 | Dedicated Capacitor for fluorescent lamp preheating luminance starting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6323597B1 (en) | Thermistor shunt for series wired light string | |
| CN1110044A (en) | Ballast circuit for a cathode-heated type of gas discharge lamp | |
| CN2145491Y (en) | Initiate preheater for fluorescent lamp | |
| KR890006109A (en) | Compact fluorescent lamp circuit | |
| CA1248169A (en) | Fluorescent light unit with dual light levels | |
| CN2148455Y (en) | Fluorescent lamp starting preheater matching with electronic ballast | |
| CN2183650Y (en) | Preheating startor of fluorescent lamp | |
| CN2167504Y (en) | High reliable high efficiency and energy-saving electronic ballast for fluorescent lamp | |
| CN2269691Y (en) | Electronic ballast | |
| CN1224325A (en) | Electronic ballast circuit for fluorescent lamp | |
| CN2399899Y (en) | Filament preheating resistance of gas discharging lamp electronic ballast | |
| CN2574330Y (en) | Fluorescent lamp preheating starting device | |
| CN2459844Y (en) | Novel electronic ballast | |
| CN2138381Y (en) | Start failure protector of electronic ballast lamp | |
| JPH04503730A (en) | Preheating connection for fluorescent lamps | |
| CN2688014Y (en) | Preheat start device for fluorescent lamp | |
| CN2142257Y (en) | Electronic fluorescent lamp | |
| CN2160187Y (en) | Electric starter | |
| CN2342508Y (en) | Over-current protector for electronic ballast | |
| CN2353050Y (en) | Automatic protection dc energy-saving lamp | |
| CN2084704U (en) | Long life starter of fluorescent lamp | |
| CN2219575Y (en) | electronic starter | |
| CN2188841Y (en) | Self-starting ballast for fluorescent lamp | |
| KR910003811Y1 (en) | Apparatus for discharge lamps | |
| CN2063732U (en) | Low voltage glow starting and lightness intensifing device for fluorescent lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |