CN202524624U - Electronic energy-saving lamp ballast possessing heat protection and heat protection device - Google Patents
Electronic energy-saving lamp ballast possessing heat protection and heat protection device Download PDFInfo
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- CN202524624U CN202524624U CN2012201056706U CN201220105670U CN202524624U CN 202524624 U CN202524624 U CN 202524624U CN 2012201056706 U CN2012201056706 U CN 2012201056706U CN 201220105670 U CN201220105670 U CN 201220105670U CN 202524624 U CN202524624 U CN 202524624U
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- saving lamp
- constant temperature
- automatic switch
- temperature automatic
- heat protection
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Abstract
The utility model relates to a ballast circuit used for an electronic energy-saving lamp and a heat protection device. An electronic energy-saving lamp ballast possessing the heat protection is connected with the energy-saving lamp, and includes a fore-stage rectifier filter circuit and a back-stage semi-bridge driving circuit. After the improvement, a constant temperature automatic switch is arranged between the fore-stage rectifier filter circuit and the back-stage semi-bridge driving circuit, and the constant temperature automatic switch is fixed on one of two switch tubes which are pasted on the semi-bridge driving circuit. The heat protection device used for the electronic energy-saving lamp ballast is the constant temperature automatic switch which is connected between the fore-stage rectifier filter circuit and the back-stage semi-bridge driving circuit of the electronic energy-saving lamp ballast, and the constant temperature automatic switch is fixed on one of two switch tubes which are pasted on the semi-bridge driving circuit. The electronic energy-saving lamp ballast possessing the heat protection can carry out the heat protection to the electronic energy-saving lamp so as to improve the electrical safety.
Description
Technical field
The utility model relates to ballast circuit and the thermel protection device that is used for electronic energy-saving lamp, and the electric energy-saving lamp ballast circuit that especially has heat protection function improves and the thermel protection device improvement.
Background technology
The present huge electronic energy-saving lamp of market owning amount considers owing to employed circuit cost or other multiple reasons cause electricity-saving lamp internal components overheated (particularly power switch pipe, magnetic material, capacitor etc.); Like component parameters variation or inefficacy, lamp tube life end etc.; Cause the electricity-saving lamp of a lot of cases seriously to burn out, shell burns fusing, more very fire hazard arranged.
Therefore; Following domestic and international market and user will be increasingly high to the safety requirements of electronic energy-saving lamp; Except the element and material of selecting high-quality for use, also design adds the overheated automatic protection functions of constant temperature, just can effectively prevent the above-mentioned electricity-saving lamp safety problem that mentions when design and production.
The patent scheme of one Chinese patent 200420039458.X discloses a kind of electric energy-saving lamp ballast with overvoltage, overcurrent and superheat protection; Comprise current rectifying and wave filtering circuit and the control circuit of supplying power by current rectifying and wave filtering circuit; Control circuit comprises the charge circuit and the discharge loop of circuits for triggering, a charge and discharge capacitance, this charge and discharge capacitance; Its design feature is in charge circuit, to increase the charge circuit adjustment pipe that is connected in series with the charge circuit switching tube is arranged; Be connected to thermistor in the base circuit of charge circuit adjustment pipe; In discharge loop, increasing has the discharge loop adjustment pipe that is connected in series with the discharge loop switching tube, is connected to another thermistor in the base circuit of discharge loop adjustment pipe.This patent scheme is from being that mode through the temperature-sensitive electronics has realized heat protection function to a certain extent; But having weak point is: 1, overvoltage protection sensitivity is low; Because positive temperature thermistor is its resistance to be diminished just make the conducting of described adjustment pipe, be that its threshold voltage ranges is very wide again, usually more than positive and negative 30V through reaching its critical voltage; So the voltage range of overvoltage protection is too wide; Be difficult to the set point that reaches desirable, and can realize in the precision of positive and negative 3V with the voltage of the overvoltage protection of accurate voltage comparator circuit, higher more than 10 than temperature-sensitive resistance protection precision; 2, thermistor is when overvoltage protection, and self-heating consumed power, and it damages when long-time protection (heating) owing to be macromolecular material device (non-semiconductor material devices) easily can occur not protecting or possibility that mistake is protected.
The utility model content
Therefore, the applicant has carried out professional discussion to the overheated automatic protection functions of electronic energy-saving lamp, and develops a kind of effective electric energy-saving lamp ballast with heat protection.
The technical scheme of the utility model is:
A kind of electric energy-saving lamp ballast with heat protection is connected on the electricity-saving lamp, comprises the current rectifying and wave filtering circuit of prime and the half-bridge drive circuit of back level.Improved, between the half-bridge drive circuit of the current rectifying and wave filtering circuit of prime and back level, insert 1 constant temperature automatic switch, and the constant temperature automatic switch is fixed in and is close to wherein on 1 of 2 switching tubes in the half-bridge drive circuit.The constant temperature automatic switch is a kind of temperature detect switch (TDS) that is configured to not reach the specified temp conducting, surpasses the specified temp disconnection.
Further, at parallelly connected 1 the RC circuit unit that is composed in series by electric capacity, resistance of two ends of said constant temperature automatic switch.Like this, when the constant temperature automatic switch that plays the disconnection protection recovered conducting once more after temperature descends back normal temperature, the surge voltage when logical surge current in the time of can being used for absorbing conducting and disconnection was not impacted by surge current with protection thermostatic switch and electricity-saving lamp ballast.
Further, said constant temperature automatic switch is the vertical plane side that is pressed in above-mentioned switching tube through the tight card of customization jump ring.Fixing through being close to of customization jump ring realization constant temperature automatic switch that tightly mode of card can be simple and reliable and switching tube, make the switching tube temperature conduction more fast smooth and easy.
A kind of thermel protection device that is used for the electric energy-saving lamp ballast; Described thermel protection device is a constant temperature automatic switch; This constant temperature automatic switch is connected between the half-bridge drive circuit of current rectifying and wave filtering circuit and back level of prime of electric energy-saving lamp ballast, and the constant temperature automatic switch is fixed in and is close to wherein on 1 of 2 switching tubes in the half-bridge drive circuit.
Further, at parallelly connected 1 the RC circuit unit that is composed in series by electric capacity, resistance of two ends of said constant temperature automatic switch.
Further, said constant temperature automatic switch is the vertical plane side that is pressed in above-mentioned switching tube through the tight card of customization jump ring.
The utility model adopts technical scheme as above; The technological merit that has is: the ballast structure and the interface of realization are simple; Can use different constant temperature automatic switch elements according to the electronic energy-saving lamp of different capacity and the difference of electric ballast caloric value, various electronic energy-saving lamps and electronic ballast circuit all are fit to install additional; And the desirable interface of ingenious selection, other performances, the index of original electronic energy-saving lamp and electric ballast there are not influence.The ballast that the constant temperature automatic switch is housed can effectively avoid electronic energy-saving lamp and electric ballast overheated because of inner other devices; Like component parameters variation or inefficacy, lamp tube life end etc.; Cause taking place seriously the burning out of electronic energy-saving lamp and electric ballast, shell burns fusing, even causes fire alarm and cause the person and property damage.
Description of drawings
Fig. 1 is the utility model one embodiment circuit theory diagrams.
Embodiment
Combine accompanying drawing and embodiment that the utility model is further specified at present.
Consult shown in Figure 1ly, the electric energy-saving lamp ballast with heat protection of present embodiment is to be connected on the electricity-saving lamp, comprises the current rectifying and wave filtering circuit of prime and the half-bridge drive circuit of back level.The circuit of electric energy-saving lamp ballast can adopt the implementation of other multiple existing current rectifying and wave filtering circuits and half-bridge drive circuit.Provide a kind of current rectifying and wave filtering circuit that utilizes bridge rectifier and the big electrochemical capacitor of filtering to realize among the embodiment, half-bridge drive circuit adopts the self-maintained circuit that is realized by pipe and associated diodes, resistance, capacity cell under pipe and the half-bridge on the half-bridge.The utility model embodiment is on the basis of existing ballast circuit; Between the half-bridge drive circuit of the current rectifying and wave filtering circuit of prime and back level, insert 1 constant temperature automatic switch SW1, and constant temperature automatic switch SW1 is fixed in and is close in the half-bridge drive circuit wherein on 1 of 2 switching tubes (on the half-bridge pipe Q1 or half-bridge pipe Q2) down.
This constant temperature automatic switch is a kind of temperature detect switch (TDS) that is configured to not reach the specified temp conducting, surpasses the specified temp disconnection.The constant temperature automatic switch can adopt existing various scheme, wherein adopts a kind of customization particulate metal thermal deformation thermostat to realize the simplest.Preferably; Constant temperature automatic switch shell also becomes the square segment (being designated hereinafter simply as the thermostatic switch body) like TO-220 triode size with the above epoxy encapsulation of flame-proof heat-resistant 200 degree; And the constant temperature automatic switch in this body draws two electrical cables, uses so that welding is installed.
Preferably, said constant temperature automatic switch is the vertical plane side that is pressed in above-mentioned switching tube through the tight card of customization jump ring.Fixing through being close to of customization jump ring realization constant temperature automatic switch that tightly mode of card can be simple and reliable and switching tube; Like this; Can be delivered to the constant temperature automatic switch very soon as long as the temperature one of switching tube changes, it is more fast smooth and easy to make the constant temperature automatic switch receive temperature conduction.
Preferably, at parallelly connected 1 the RC circuit unit that is composed in series by capacitor C 9, resistance R 4 of two ends of said constant temperature automatic switch.
Be the operation principle of example explanation the utility model below with 20W electronic energy-saving lamp (hereinafter to be referred as electricity-saving lamp): at normal temperatures during operate as normal; Electric current through constant temperature automatic switch (hereinafter to be referred as thermostatic switch) is 100---300 milliampere (because of different circuit and different input voltage differ greatly); Space temperature in the electricity-saving lamp housing is between 90---98 degree centigrade, and the temperature of two switching tubes is (junction temperature of switching tube is 150 degrees centigrade) between 115---120 degree centigrade.Select the setting operating temperature of the thermostatic switch of customization this moment for use is 130 degrees centigrade, and operating current is 1 peace; During the electricity-saving lamp operate as normal, thermostatic switch remains on logical state, and the operate as normal of electricity-saving lamp is had no effect; When electricity-saving lamp occurs unusually when overheated, concentrated reflection is on 2 switching tubes of electricity-saving lamp; When rectifying effect occurring like fluorescent tube, modulating voltage descends and lamp current rises suddenly, and certainly will cause the switching tube overload and Guan Wen rises sharply; When the temperature of switching tube reached 135 degrees centigrade, thermostatic switch broke off, and has cut off electricity-saving lamp operating current major loop, uses whole oscillating circuit to quit work; After the fault of electricity-saving lamp was got rid of, thermostatic switch can be connected automatically, and electricity-saving lamp gets into normal operating conditions again.Here be noted that: the constant temperature operating temperature is 130 degrees centigrade; And will reaching 135 degrees centigrade of thermostatic switches, just breaks off switching tube; The constant temperature automatic switch is fixed in and is close on the switching tube although this is, there are the reason of thermal resistance in the surface of switching tube and the insulator of thermostatic switch.Therefore, when we customize at the specified temp for thermostatic switch, need consider this point.
In the preferred embodiment; Function in the RC unit of two end shunt capacitance C9 of constant temperature automatic switch and resistance R 4 is: when thermostatic switch by breaking off (the on-off action that the fault of electricity-saving lamp can be gone round and begun again before not getting rid of when connecting again; Be to connect automatically after thermostatic switch gets into normal temperature); Be used for absorbing the surge voltage of logical surge current when breaking off when connecing, not impacted by surge current with protection thermostatic switch and electricity-saving lamp ballast.Be that the electricity-saving lamp ballast can not get into operating state because the capacitance of C9 is very little, and when thermostatic switch broke off, C9 two ends had only minimum leakage current again.
It should be noted that; The overheated automatic safety device of constant temperature inserts between the half-bridge drive circuit of the current rectifying and wave filtering circuit of prime and back level; It is rear end at the big electrochemical capacitor C2 of filtering; And the reason of front end that is not contained in electrolysis C2 is following: if be contained in the front end (promptly installing again between rectifier bridge unit and the filter unit) of the big capacitor C 2 of filtering, when thermostatic switch by being disconnected to when connecting the charging current that will bear electrochemical capacitor; Special when using big capacity electrochemical capacitor, the charging current that is several times as much as operating current can be damaged thermostatic switch.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; But the those skilled in the art should be understood that; In the spirit and scope of the utility model that does not break away from appended claims and limited; Can make various variations to the utility model in form with on the details, be the protection range of the utility model.
Claims (6)
1. the electric energy-saving lamp ballast that has the heat protection; Be connected on the electricity-saving lamp; Comprise the current rectifying and wave filtering circuit of prime and the half-bridge drive circuit of back level; It is characterized in that: between the half-bridge drive circuit of the current rectifying and wave filtering circuit of prime and back level, insert 1 constant temperature automatic switch, and the constant temperature automatic switch is fixed in and is close to wherein on 1 of 2 switching tubes in the half-bridge drive circuit.
2. the electric energy-saving lamp ballast with heat protection according to claim 1 is characterized in that: 1 RC circuit unit that is composed in series by electric capacity, resistance of two ends parallel connection of said constant temperature automatic switch.
3. the electric energy-saving lamp ballast with heat protection according to claim 1 and 2 is characterized in that: said constant temperature automatic switch is the vertical plane side that is pressed in above-mentioned switching tube through the tight card of customization jump ring.
4. the thermel protection device that is used for the electric energy-saving lamp ballast; It is characterized in that: described thermel protection device is a constant temperature automatic switch; This constant temperature automatic switch is connected between the half-bridge drive circuit of current rectifying and wave filtering circuit and back level of prime of electric energy-saving lamp ballast, and the constant temperature automatic switch is fixed in and is close to wherein on 1 of 2 switching tubes in the half-bridge drive circuit.
5. the thermel protection device that is used for the electric energy-saving lamp ballast according to claim 1 is characterized in that: 1 RC circuit unit that is composed in series by electric capacity, resistance of two ends parallel connection of said constant temperature automatic switch.
6. according to claim 4 or the 5 described thermel protection devices that are used for the electric energy-saving lamp ballast, it is characterized in that: said constant temperature automatic switch is the vertical plane side that is pressed in above-mentioned switching tube through the tight card of customization jump ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201056706U CN202524624U (en) | 2012-03-20 | 2012-03-20 | Electronic energy-saving lamp ballast possessing heat protection and heat protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201056706U CN202524624U (en) | 2012-03-20 | 2012-03-20 | Electronic energy-saving lamp ballast possessing heat protection and heat protection device |
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| Publication Number | Publication Date |
|---|---|
| CN202524624U true CN202524624U (en) | 2012-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201056706U Expired - Fee Related CN202524624U (en) | 2012-03-20 | 2012-03-20 | Electronic energy-saving lamp ballast possessing heat protection and heat protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762835A (en) * | 2014-01-24 | 2014-04-30 | 成都熊谷加世电器有限公司 | Starting inrush current suppression circuit |
-
2012
- 2012-03-20 CN CN2012201056706U patent/CN202524624U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762835A (en) * | 2014-01-24 | 2014-04-30 | 成都熊谷加世电器有限公司 | Starting inrush current suppression circuit |
| CN103762835B (en) * | 2014-01-24 | 2016-01-20 | 成都熊谷加世电器有限公司 | A kind of power-on surge current suppresses circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20150320 |
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| EXPY | Termination of patent right or utility model |