CN1652656A - Circuit for protecting filament of fluorescent tube - Google Patents
Circuit for protecting filament of fluorescent tube Download PDFInfo
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- CN1652656A CN1652656A CN 200410015289 CN200410015289A CN1652656A CN 1652656 A CN1652656 A CN 1652656A CN 200410015289 CN200410015289 CN 200410015289 CN 200410015289 A CN200410015289 A CN 200410015289A CN 1652656 A CN1652656 A CN 1652656A
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- filament
- tube
- fluorescent tube
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- lamp
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Abstract
The protected circuit through litten tube heats up cavity temperature of lamp holder seat or temperature of luminous tube as well as turns on (close) normal open type thermostat WKl, WK2, which are connected to filament 1 and filament 2 at two ends of lamp tube in parallel. Thus, filaments at two ends of lamp tube are in short circuit. Resonance current bypasses filaments. This arrangement possesses advantages of not influencing normal preheating and starting lamptube as well as preventing from phenomena of tungsten evaporation generated by too much of filament current when normal ignition so as to prolong service life of filaments and save energy since power waste on filaments caused by resonance current is avoided.
Description
Technical field
The present invention relates to a kind of fluorescent tube filament resist technology, especially compact fluorescent lamp tube (containing split type fluorescent lamp) filament protective circuit that cooperates electric ballast to use.
Background technology
Compact fluorescent lamp is a kind of energy-conserving light source, is widely used.Fluorescent lamp is made and is generally adopted technologies such as water dusting and glass-tube stopping off; the lamp life-span duration of work chemistry that causes by the reason of fluorescent material and glass-tube, physical damnification and the phenomenon that causes the bright sustainment rate of light stream to reduce is better overcome; in the result of compact fluorescent lamp light decay and life test (two groups of lamps being surveyed all are instantaneous startings), show that filament blow and seal wire come off and account for whole failure rate 75%.Cause three basic processes of cathode emission material loss; (1) chemical reaction of cathode emission material and gaseous impurity; (2) sputter; (3) evaporation.Wherein first factor is negligible fully to making good fluorescent lamp, and the small amount of impurities gas that occurs in the fluorescent tube works main and phosphor powder layer, and the latter's area is more much bigger than negative electrode.For sputter and evaporation, sputter mainly occurs in start-up course, and evaporation mainly occurs in the burning-point process.Cathode life has determined the life-span of fluorescent lamp.If fluorescent tube does not have pipeline start up by preheating, electrode blast temperature rise causes that cathode emission material sheet peels off during startup, can reduce the storage capacity of coating significantly.In the burning-point process, if cathode current is excessive, superheating phenomenon will appear in filament, makes the oxide material accelerated evaporation, causes the tungsten evaporation when serious, fluorescent tube is turned black in early days, the lost of life.Simultaneously; when the fluorescent lamp operate as normal; because filament is a resistance element; so thermal losses must take place; its power consumption is generally in gross power more than 10%; made bigger waste; in order to address the above problem; I disclose a kind of filament cathode protective circuit scheme in Chinese patent ZL96217089.5; it is on the seal wire of two groups of filament cathodes of fluorescent tube; difference negative tempperature coefficient thermistor NTC in parallel, but owing to thermistor NTC damages than being easier in the process of long-term energising, thereby fail to be applied widely.
Summary of the invention
The objective of the invention is by cavity temperature or tube wall temperature in cavity temperature, the fluorescent tube lamp socket in the electric ballast behind the normal burning-point of fluorescent tube, with thermostat WK1 open in usual, the WK2 closure that is attempted by on lamp tube ends filament 1, filament 2 connecting lines, the short circuit filament, resonance current is passed through, prolonging lamp tube useful life and further energy savings effectively from the filament bypass.
Purpose of the present invention can realize by following technical measures: on the connecting line of the two ends of fluorescent tube filament 1, filament 2, thermostat WK1 open in usual, WK2 in parallel, thermostat WK1, WK2 can also be close on the tube wall by fixing mode, by cavity temperature in cavity temperature, the fluorescent tube lamp socket in the electric ballast behind the normal burning-point of fluorescent tube or tube wall temperature thermostat take-off adhesive, with lamp tube ends filament 1, filament 2 short circuits, resonance current is passed through from the filament bypass, not only avoided resonance current in the power consumption of filament but also reduced filament pervaporation phenomenon.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is elaborated.
Fig. 1 is the electrical schematic diagram of fluorescent tube filament protective circuit.
Fig. 2 is placed on the interior structural representation of tube face for WK device of the present invention.
Fig. 3 is close to the structural representation of tube wall for WK device of the present invention adopts fixed form.
Embodiment
As shown in Figure 1, on the connecting line of fluorescent tube two ends filament 1, filament 2, be parallel with thermostat WK1 open in usual, WK2.When the electric ballast energized is worked, be divided into two-way through the high-frequency current after the switching circuit conversion, wherein one the tunnel is operating current Id by fluorescent tube, another road is the resonance current Ic of fluorescent tube filament and resonance capacitor C x of flowing through.And filament is a resistance element, so heat release loss must take place, the filament when making operate as normal produces the tungsten evaporation, and it is about 10% that the power consumption on filament accounts for the input electric energy, caused very big waste.At this moment, heater members such as electric ballast magnetic material heat the electric ballast inner chamber, when reaching the thermostat take-off temperature of setting, thermostat WK1, WK2 closure, filament 1, filament 2 short circuits with lamp tube ends make resonance current pass through from the filament bypass, not only avoided the power consumption of resonance current on filament, and having reduced the tungsten Evaporation Phenomenon of filament, both energy efficient has prolonged useful life of fluorescent tube again effectively.
Fig. 2 is the structural representation that thermostat WK is set in the tube face of split type fluorescent tube.Figure is same as in figure 1 for its basic principle, and the temperature of different is heating temperature control device WK is that the heat by the fluorescent tube filament part makes thermostat WK1, WK2 reach design temperature and take-off the heating of tube shell inner chamber, with lamp tube ends filament 1, filament 2 short circuits.
Fig. 3 adopts fixing mode to be close on the tube wall of fluorescent tube thermostat WK1, WK2, reaches design temperature sooner and makes thermostat WK1, WK2 take-off to reach, with the purpose of lamp tube ends filament 1, filament 2 short circuits.Fixed form can adopt forms such as binding, gluing, location notch to constitute.
Claims (3)
1. fluorescent tube filament protective circuit is characterized in that a thermostat open in usual (WK1), (WK2) of inserting in parallel respectively on the connecting line of two ends filament (1), filament (2) of fluorescent tube or compact fluorescent tube.
2. fluorescent tube filament protective circuit according to claim 1; it is characterized in that being connected in parallel on thermostat open in usual (WK1), (WK2) on fluorescent tube or the compact fluorescent lamp tube two ends filament connecting line, the mode that can also take to fix is close to fluorescent tube and places on the tube wall of the tube wall of filament position or other position of fluorescent tube.
3. according to claim 1,2 described fluorescent tube filament protective circuits, it is characterized in that the temperature of described thermostat open in usual (WK1), (WK2) is arranged on 40～125 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410015289 CN1652656A (en) | 2004-02-06 | 2004-02-06 | Circuit for protecting filament of fluorescent tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410015289 CN1652656A (en) | 2004-02-06 | 2004-02-06 | Circuit for protecting filament of fluorescent tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1652656A true CN1652656A (en) | 2005-08-10 |
Family
ID=34868000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410015289 Pending CN1652656A (en) | 2004-02-06 | 2004-02-06 | Circuit for protecting filament of fluorescent tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1652656A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502183B (en) * | 2006-08-03 | 2013-07-10 | 库珀·克劳斯-海因兹有限责任公司 | Device and method for monitoring at least one fluorescent lamp |
-
2004
- 2004-02-06 CN CN 200410015289 patent/CN1652656A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502183B (en) * | 2006-08-03 | 2013-07-10 | 库珀·克劳斯-海因兹有限责任公司 | Device and method for monitoring at least one fluorescent lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |