CN201039563Y - Fluorescent lamp pre-heating start circuit based on self-excited electronic rectifier - Google Patents
Fluorescent lamp pre-heating start circuit based on self-excited electronic rectifier Download PDFInfo
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- CN201039563Y CN201039563Y CNU2007200359113U CN200720035911U CN201039563Y CN 201039563 Y CN201039563 Y CN 201039563Y CN U2007200359113 U CNU2007200359113 U CN U2007200359113U CN 200720035911 U CN200720035911 U CN 200720035911U CN 201039563 Y CN201039563 Y CN 201039563Y
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- lamp
- fluorescent tube
- preheating
- flourescent lamp
- filament
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Abstract
The utility model relates to a flourescent lamp preheat and start circuit of an auto-excitation type electronic ballast, comprising a flourescent lamp tube, a half bridge driving circuit, an inductive ballast and a resonant capacitor, wherein, the inductive ballast is connected between the flourescent lamp tube and the half bridge driving circuit in series; the resonant capacitor is connected between the two end filaments of the flourescent lamp in parallel and is in series connected with the inductive ballast through the filament at one end of the flourescent lamp; the utility model also comprises a flat bulb element which is connected in parallel between the two end filaments of the flourescent lamp with the resonant capacitor; and the flat bulb element consists of a pair of metal sheets which is formed by a straight type electrode and a U shaped bimetallic electrode with various swell factor. The utility model is stable and reliable when the flourescent lamp is preheated the started and meets the demand of coherence and interchangeability of lamp tubes.
Description
Technical field
The utility model belongs to preheating and starting circuit of florescent lamp, particularly a kind of preheating and starting circuit of florescent lamp based on auto-excitation type electric ballast.
Background technology
High performance auto-excitation type electric ballast requires fluorescent tube to provide enough warm-up time of the filament pre-heating electric current that meets the fluorescent tube standard-required and 0.4-2 second to tube cathode before triggering, make filament reach the desired suitable temperature of emitting electrons (950-1000) ° K, trigger that then lamp is lighted.
The preheat circuit of fluorescent lamp is filament " current-mode " preheat circuit that a kind of widely popular thermistor PTC forms as shown in Figure 1 at present.Though sort circuit electronic component integrated level is good, utilize thermistor PTC pipeline start up by preheating to have following problem:
1) consistency is poor, lost efficacy easily: facts have proved that thermistor PTC preheat curent and warm-up time consistency when producing in batches is relatively poor, can not reach satisfied effect, special task is after a period of time, the PTC resistive performance is aging, makes pre-hot property generation significant change, and PTC resistance power consumption increases, cause to burn out and burst, product reliability is descended.
2) fluorescent tube interchangeability is relatively poor: thermistor PTC pipeline start up by preheating requires high to the fluorescent tube consistency of performance, changes the same model fluorescent tube of different factories, often makes the preheating performance change, does not reach pre-heat effect, and the serious lamp tube service life that makes descends.
Summary of the invention
In order to remedy above deficiency, the utility model provides a kind of pipeline start up by preheating the reliable and stable preheating and starting circuit of florescent lamp based on auto-excitation type electric ballast.
The technical solution of the utility model is such realization: a kind of preheating and starting circuit of florescent lamp based on auto-excitation type electric ballast, comprise fluorescent tube, half-bridge drive circuit, be series at the ballast inductance between this fluorescent tube and this half-bridge drive circuit and be parallel to resonant capacitance between this fluorescent tube two ends filament, this resonant capacitance is connected in series by filament and this ballast inductance of this fluorescent lamp one end, this preheating and starting circuit of florescent lamp also comprises and this resonant capacitance is parallel to flat bubble element between this fluorescent tube two ends filament simultaneously, the pair of metal sheet that this flat bubble element is made up of a straight type electrode and a U type bimetallic electrode with different coefficients of expansion.
Should flatly steep element for to form with a U type bimetallic electrode with different coefficients of expansion by a straight type electrode, should have and common flat bubble characteristic inequality by flat bubble element: first impulse duration after connecting voltage, should flatly steep element glow discharge and make the U-shaped bimetallic electrode obtain enough heats and extensional deformation, the result of distortion connects the two poles of the earth.After this pulse voltage is more and more littler, and the duration is shorter and shorter.Therefore guarantee that preheat curent and warm-up time are more reliable and more stable, are suitable for product lot quantity production.
Description of drawings
Fig. 1 is a fluorescent lamp pipeline start up by preheating device circuit block diagram of the prior art;
Fig. 2 is for adopting preheating and starting circuit of florescent lamp block diagram of the present utility model;
Fig. 3 is the structural representation of described flat bubble element;
The characteristic schematic diagram that Fig. 4 should possess for the fluorescent lamp pipeline start up by preheating;
Fig. 5 is the actual fluorescent lamp pipeline start up by preheating characteristic schematic diagram that records among the embodiment.
Embodiment
Below in conjunction with Fig. 2 and Fig. 3, be further described:
A kind of preheating and starting circuit of florescent lamp based on auto-excitation type electric ballast, comprise fluorescent tube, half-bridge drive circuit, be series at the ballast inductance L between this fluorescent tube and this half-bridge drive circuit and be parallel to resonant capacitance C between this fluorescent tube two ends filament, this resonant capacitance C is connected in series by filament and this ballast inductance L of this fluorescent lamp one end, this preheating and starting circuit of florescent lamp also comprises and this resonant capacitance C is parallel to flat bubble element between this fluorescent tube two ends filament simultaneously, the pair of metal sheet that this flat bubble element is made up of a straight type electrode and a U type bimetallic electrode with different coefficients of expansion.
The pipeline start up by preheating of electric ballast should satisfy starting characteristic shown in Figure 4 just can reach pre-heat effect preferably, and as can be known from Fig. 4: 1, between Δ t warming up period, should meet the warm-up time of stipulating in the fluorescent tube standard its warm-up time; 2, between Δ t warming up period, the size of its preheat curent should meet the temperature that setting in the fluorescent tube standard just reaches emitting electrons; 3, between Δ t warming up period, the tube voltage of its fluorescent tube should be enough low, to prevent the injury of sputters such as glow discharge and hard reboot to filament; 4, preheating finishes, and when fluorescent tube entered normal operating condition, heater current should be enough little, to reduce plate loss.To satisfy above-mentioned preheating requirement simultaneously for auto-excitation type electric ballast, almost be difficult to.
Use the utility model, after Fig. 2 connection, 12 T8/28W fluorescent lamps are carried out the ON/OFF test, accumulative total ON/OFF number of times reaches more than 43000 time, also no abnormal result, as need not as described in flat bubble element, the test of accumulative total ON/OFF can only be experienced 10000 left and right sides filaments and just damage, get 50 continuous ON/OFF tests of T8/28W lamp 2000 times simultaneously, all obtain satisfied result, as shown in Figure 5, utilize HB-5A electric ballast performance evaluation instrument, the actual pipeline start up by preheating characteristic that records on the T8/28W electric ballast.Therefore adopt the utility model to be applied to the filament pre-heating startup life-span of improving fluorescent tube is played obvious effects.
Claims (1)
1. preheating and starting circuit of florescent lamp based on auto-excitation type electric ballast, comprise fluorescent tube, half-bridge drive circuit, be series at the ballast inductance (L) between this fluorescent tube and this half-bridge drive circuit and be parallel to resonant capacitance (C) between this fluorescent tube two ends filament, this resonant capacitance (C) is connected in series by filament and this ballast inductance (L) of this fluorescent lamp one end, it is characterized in that, this preheating and starting circuit of florescent lamp also comprises and this resonant capacitance (C) is parallel to flat bubble element between this fluorescent tube two ends filament simultaneously, the pair of metal sheet that this flat bubble element is made up of a straight type electrode and a U type bimetallic electrode with different coefficients of expansion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200359113U CN201039563Y (en) | 2007-04-13 | 2007-04-13 | Fluorescent lamp pre-heating start circuit based on self-excited electronic rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200359113U CN201039563Y (en) | 2007-04-13 | 2007-04-13 | Fluorescent lamp pre-heating start circuit based on self-excited electronic rectifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201039563Y true CN201039563Y (en) | 2008-03-19 |
Family
ID=39212093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200359113U Expired - Fee Related CN201039563Y (en) | 2007-04-13 | 2007-04-13 | Fluorescent lamp pre-heating start circuit based on self-excited electronic rectifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201039563Y (en) |
-
2007
- 2007-04-13 CN CNU2007200359113U patent/CN201039563Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Preheating and starting circuit of florescent lamp based on auto-excitation type electric ballast Effective date of registration: 20101222 Granted publication date: 20080319 Pledgee: Huaxia Bank, Limited by Share Ltd, Suzhou branch Pledgor: Suzhou Kunshilai Illumination Technology Co., Ltd. Registration number: 2010990001021 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080319 Termination date: 20130413 |