CN202454530U - Low-frequency discharge lamp - Google Patents
Low-frequency discharge lamp Download PDFInfo
- Publication number
- CN202454530U CN202454530U CN2012200015520U CN201220001552U CN202454530U CN 202454530 U CN202454530 U CN 202454530U CN 2012200015520 U CN2012200015520 U CN 2012200015520U CN 201220001552 U CN201220001552 U CN 201220001552U CN 202454530 U CN202454530 U CN 202454530U
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- electrodeless lamp
- low frequency
- circuit
- foam
- discharge lamp
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Abstract
The utility model discloses a low-frequency discharge lamp which relates to the technical field of discharge lamps. The low-frequency discharge lamp comprises a glass bulb housing, wherein inert gas is filled in a bulb body of the glass bulb housing, a cavity surrounded by the bulb body is internally provided with an iron core wound with an electromagnetic coil, and the iron core is electrically connected with a high-frequency generator outside the bulb housing. According to the low-frequency discharge lamp provided by the utility model, as a power coupler is arranged in the glass bulb housing, the volume of the discharge lamp is reduced, the structure of the discharge lamp is more compact, the electromagnetic leakage is also reduced, the lumen loss is avoided, and the cost of the discharge lamp is lowered. In addition, the safety of the low-frequency discharge lamp provided by the utility model is relatively high.
Description
Technical field
The utility model relates to electrodeless lamp technical field, relates in particular to a kind of low frequency electrodeless lamp.
Background technology
Low frequency electrodeless lamp mainly is made up of radio-frequency generator, power coupler and glass cell-shell three parts; Through way of electromagnetic induction energy is coupled in the bulb; Being that comprehensive power electronics, plasma are learned, magnetic material is learned the new and high technology illuminating product that scheduling theory develops, is the technological maturation of a new generation and the practical long-life of commercialization, the light source of high light efficiency.Mostly the bulb of traditional low frequency electrodeless lamp is annular, is filled with an amount of special gas in it, and bulb inner wall scribbles fluorescent material, and bulb outer wall cover is cored, and around solenoid (formation power coupler), solenoid connects radio-frequency generator on the iron core.Electromagnetic field through radio-frequency generator is coupled in the bulb with the mode of responding to; Make gas snowslide in it (ionization or excite); Atom after exciting sends ultraviolet photon when higher energy level is returned ground state, and ultraviolet photon excites the fluorescent material of inner wall to produce visible light.
The electrodeless lamp of high power low-frequency is the existence that other conventional illuminating lamp commonly used institute can't reach, and still traditional electrodeless lamp coupler of high power low-frequency is external, the fluorescent tube volume is big, and the joined light fixture that overall volume causes greatly is also considerably less, and causes some lumen losses.Coupler is external in addition also can cause a spot of electromagnetism to leak.
The utility model content
The technical problem that (one) will solve
The technical problem that the utility model will solve is: how to provide a kind of volume less low frequency electrodeless lamp.
(2) technical scheme
For addressing the above problem; The utility model provides a kind of low frequency electrodeless lamp; This electrodeless lamp comprises: the glass cell-shell; Be full of inert gas in the foam of said cell-shell, be provided with the iron core that is wound with solenoid in the cavity that said foam enclosed, said iron core is electrically connected with the outer radio-frequency generator of said cell-shell.
Preferably, cavity that said foam encloses is the U-shaped chamber, and the opening part in said U-shaped chamber is sealed by seal.
Preferably, cavity that said foam encloses is a vacuum chamber.
Preferably, scribble fluorescent material on the said foam inwall.
Preferably, also be provided with the solid mercurial on the said foam inwall.
Preferably, said solid mercurial is arranged at least one place on the said foam inwall.
Preferably, this electrodeless lamp also comprises: current rectifying and wave filtering circuit.
Preferably, this electrodeless lamp also comprises: circuit of power factor correction, its input connects the output of said current rectifying and wave filtering circuit.
Preferably, this electrodeless lamp also comprises: inverter circuit, and its input connects the output of said circuit of power factor correction, and output connects said radio-frequency generator.
Preferably, this electrodeless lamp also comprises: abnormity protection circuit links to each other with said inverter circuit.
(3) beneficial effect
The low frequency electrodeless lamp of the utility model is through being built in power coupler in the glass cell-shell; Thereby reduced the volume of electrodeless lamp, made its structure compact more, also reduced electromagnetism simultaneously and leaked; Avoided the lumen loss; Reduced the cost of electrodeless lamp, in addition, the low frequency electrodeless lamp fail safe of the utility model is higher.
Description of drawings
Fig. 1 is the structural representation according to the low frequency electrodeless lamp of a kind of execution mode of the utility model;
Fig. 2 is the structured flowchart according to the low frequency electrodeless lamp of a kind of execution mode of the utility model;
Fig. 3 is the filter circuit construction sketch map according to the low frequency electrodeless lamp of a kind of execution mode of the utility model;
Fig. 4 is the pfc circuit structural representation according to the low frequency electrodeless lamp of a kind of execution mode of the utility model;
Fig. 5 is the inverter circuit structural representation according to the low frequency electrodeless lamp of a kind of execution mode of the utility model;
Fig. 6 is the abnormity protection circuit structural representation according to the low frequency electrodeless lamp of a kind of execution mode of the utility model.
Embodiment
The low frequency electrodeless lamp that the utility model proposes specifies as follows in conjunction with accompanying drawing and embodiment.
As shown in Figure 1; Low frequency electrodeless lamp according to a kind of execution mode of the utility model comprises: glass cell-shell 1, power coupler and radio-frequency generator, and this power coupler is built in the glass cell-shell 1, thereby has reduced the volume of electrodeless lamp; Make its structure compact more; Also reduce electromagnetism simultaneously and leaked, avoided the lumen loss, reduced the cost of electrodeless lamp.
In the electrodeless lamp of this execution mode; Be full of inert gas (for example argon gas) in the foam 1-1 of cell-shell 1; Scribble fluorescent material (preferred fluorescent RE powder) on the inwall of foam 1-1; Also be provided with at least one place solid mercurial (being two places in this execution mode, solid mercurial 1-1-1 and auxiliary solid mercurial 1-1-2, but be not limited thereto).Be provided with the iron core 2 (formation power coupler) that an end is wound with solenoid in the cavity 1-2 that the 1-1 foam is enclosed; Preferably; This foam 1-1 encloses cavity 1-2 and takes the shape of the letter U, and its opening part is by the sealing of seal (not shown), and this cavity 1-2 is a vacuum chamber; Thereby, constitute vacuum-packed discharge space with glass cell-shell 1.Solenoid lead-in wire is drawn to be connected with the radio-frequency generator 3 of outside from seal and is drawn the access electric current.Be equivalent in the gas discharge that a low-frequency transformer iron core that contains electromagnetism primary coil is immersed in a vacuum tight in the heart, discharge gas (ionization is the plasma gaseous conductor) is equivalent to the secondary coil of transformer.
In addition, as shown in Figure 2 in order to improve the fail safe of low frequency electrodeless lamp, the low frequency electrodeless lamp of the utility model also comprises: current rectifying and wave filtering circuit, circuit of power factor correction, inverter circuit and abnormity protection circuit.
The effect of current rectifying and wave filtering circuit is in order to prevent that the lamp power supply noise from scurrying into power network, to disturb other power consumption equipments, and stops the noise input lamp power supply in the power network, avoids influencing the operate as normal of lamp.The filtering part of current rectifying and wave filtering circuit is as shown in Figure 3 to be the two-stage type power filter network of being made up of inductance and electric capacity, and CX1, CX2, CX3 also are X electric capacity, bypass the DM EMI noise.LF1, LF2 are common mode choke, suppress common-mode noise.CY1, CY2 also are Y electric capacity, are used to suppress the radio noise of power transmission line secondary.RV1 is a varistor, is used for absorbing the spike overvoltage.Power-type NTC themistor of serial connection in power circuit, the surge current in the time of suppressing to start shooting effectively.R1, R2 are the bleeder resistances of X electric capacity.
The input of power factor correction (PFC) circuit links to each other with the output of current rectifying and wave filtering circuit, and output connects said radio-frequency generator.This circuit preferably is made up of the MC33262 chip, and this chip is a power factor correction chip reliable and with low cost, and its application circuit is as shown in Figure 4.Obtain Rectified alternating current after the effect of civil power through current rectifying and wave filtering circuit, when C2 charged to 10V, IC1's this direct current electric current started working through starting resistance R10.Dc pulse moving voltage after the rectification is imported multiplier as sampled signal through 3 pin of IC1 in the dividing potential drop of R5.The dividing potential drop of VD on R6 and WR transported to the inverting input of error amplifier through 1 pin, relatively amplifies direct-flow error voltage of back output with the reference voltage of 2.5V, also is input to multiplier simultaneously.Electric current through power switch MOSFET converts voltage signal on source resistance R9, be input to 4 pin of IC1, and compares with the output voltage of multiplier.Pass through to peak value from zero with AC voltage sinusoidally, the threshold value of 4 pin of the output voltage control IC 1 of multiplier, thus make the peak current of Q1 follow the tracks of ac input voltage, cause the load of correcting circuit to be resistive.
Because the control action of MC33262, make input current tightly follow AC voltage and change, be level and smooth sine wave.Simultaneously, pfc circuit is again a kind of booster type switching power supply, and the power of electrodeless lamp and luminous flux can not changed with the fluctuation of line voltage.
Inverter circuit is as shown in Figure 5.Its input connects the output of pfc circuit, the high voltage direct current of pfc circuit output is transformed to the high-frequency alternating current of the electrodeless lamp use of confession.It is 2.2MHz～3.0MHz that the CISPR15 of International Electrotechnical Commission allows the frequency range to the magnetic field induction standard, and its centre frequency is 2.6MHz.Pfc circuit output dc voltage after the energized. be added on the capacitor C 12 through R19, R18, C12 begins charging.When C12 attend institute's charging voltage and reaches the breakover voltage of trigger tube (DI-AC) D8～D16, DI-AC transferred conducting state to by shutoff.The stored electric charge of integrating capacitor C12 relies on W22, two windings of W21 to make Q81, Q82 acquisition amplitude equate the drive signal that the phase phasic difference is 180 ° through the elementary winding W20 that DI-AC is added on oscillation transformer BT1.Q81 is compelled to turn-off and ends when the Q82 conducting; During the Q81 conducting, Q82 is compelled to again turn-off and ends.The frequency of oscillation of inverter circuit is determined by the input capacitance of the inductance value of winding W21, W22 and FET Q81, Q82 and building-out capacitor C81, C82 jointly; The resonance frequency of lamp loop network must be identical with the resonance frequency of input circuit, and for example: resonance frequency is 2.65MHz.Also to optimize the amplitude and the waveform of Q81, Q82 drive signal as possible, make himself power consumption drop to minimum.Diode D8 ' has two effects: the electric charge on the C12 that is used for during forward releasing prevents that inverter circuit from because of common conducting phenomenon appears in false triggering, shielding; When reverse, utilize the reverse current of reverse recovery time to be the oscillation transformer input signal.
Lz, C14, C15 are resonant inductance resonant electric capacity among Fig. 5, and it is the important parameters in the circuit.The startup stage, the equivalent resistance of electrodeless lamp bulb is very big, series resonance takes place in Lz, C14, C15, resonant circuit can form the ignition voltage of very high (about 3000V) at the lamp two ends.After electrodeless lamp ignites, get into normal operating phase, in the foam electric arc equivalent resistance at hundreds of ohms, after lamp current generates, the resonant tank off resonance, C14, the last resonance potential of C15 drop to the operating voltage of lamp.Lamp is lighted lamp is stablized in the back by Lz arc current.Meanwhile, because the frequency-selective filtering effect of output loop, the electric energy of lighting a lamp is the voltage and current of a cosine wave, and its frequency is the fundamental frequency of pumping signal.
When occurring that the bulb wiring comes off or during abnormality such as bulb gas leakage, electrodeless lamp can not normally start, the resonance circuit of igniting is in resonance condition always, and the electric current of inverter circuit output increases to 3～5 times of normal current.If do not take effective safeguard measure, will cause light a lamp inverter and prime element circuit to burn because of overload, even cause smolder, accident such as explosion.Therefore, the electrodeless lamp of the utility model also comprises: abnormity protection circuit, its circuit constitutes as shown in Figure 6.
When abnormality: draw the abnormal protection sampled voltage at the mid point of resonant capacitance C14, C15; Become control voltage after dividing potential drop through capacitor C 16, C18 and D18, D19, the R24 rectification, through R25, R21 and C19 delay circuit, the direct voltage that on C19, is risen in time; When this voltage just breakdown during greater than the voltage stabilizing value of DZ1; Controllable silicon MCR conducting with Q82 grid and ground short circuit, forces half-bridge inversion circuit to quit work through blocking diode D17.And under normal condition, the last voltage of C19 does not also rise to the voltage stabilizing value of DZ1, and lamp has just been lighted, and lamp is lighted the just off resonance of back resonant circuit, thereby DZ1 is in cut-off state always.Can not obtain too big the operate time of protective circuit, was generally 1～2 second.C20, R23 play anti-interference effect, prevent that unidirectional silicon is because of the interference signal misoperation.
Above execution mode only is used to explain the utility model; And be not the restriction to the utility model; The those of ordinary skill in relevant technologies field under the situation of spirit that does not break away from the utility model and scope, can also be made various variations and modification; Therefore all technical schemes that are equal to also belong to the category of the utility model, and the scope of patent protection of the utility model should be defined by the claims.
Claims (10)
1. low frequency electrodeless lamp; It is characterized in that this electrodeless lamp comprises: the glass cell-shell is full of inert gas in the foam of said cell-shell; Be provided with the iron core that is wound with solenoid in the cavity that said foam enclosed, said iron core is electrically connected with the outer radio-frequency generator of said cell-shell.
2. low frequency electrodeless lamp as claimed in claim 1 is characterized in that, cavity that said foam encloses is the U-shaped chamber, and the opening part in said U-shaped chamber is sealed by seal.
3. low frequency electrodeless lamp as claimed in claim 1 is characterized in that, cavity that said foam encloses is a vacuum chamber.
4. low frequency electrodeless lamp as claimed in claim 1 is characterized in that, scribbles fluorescent material on the said foam inwall.
5. low frequency electrodeless lamp as claimed in claim 1 is characterized in that, also is provided with the solid mercurial on the said foam inwall.
6. low frequency electrodeless lamp as claimed in claim 5 is characterized in that, said solid mercurial is arranged at least one place on the said foam inwall.
7. low frequency electrodeless lamp as claimed in claim 1 is characterized in that, this electrodeless lamp also comprises: current rectifying and wave filtering circuit.
8. low frequency electrodeless lamp as claimed in claim 7 is characterized in that, this electrodeless lamp also comprises: circuit of power factor correction, its input connects the output of said current rectifying and wave filtering circuit.
9. low frequency electrodeless lamp as claimed in claim 8 is characterized in that, this electrodeless lamp also comprises: inverter circuit, and its input connects the output of said circuit of power factor correction, and output connects said radio-frequency generator.
10. low frequency electrodeless lamp as claimed in claim 9 is characterized in that, this electrodeless lamp also comprises: abnormity protection circuit links to each other with said inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200015520U CN202454530U (en) | 2012-01-04 | 2012-01-04 | Low-frequency discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200015520U CN202454530U (en) | 2012-01-04 | 2012-01-04 | Low-frequency discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202454530U true CN202454530U (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200015520U Expired - Fee Related CN202454530U (en) | 2012-01-04 | 2012-01-04 | Low-frequency discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202454530U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474326A (en) * | 2013-08-14 | 2013-12-25 | 中国电子科技集团公司第十六研究所 | High-frequency electrodeless lamp based on micro-channel heat pipe |
-
2012
- 2012-01-04 CN CN2012200015520U patent/CN202454530U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474326A (en) * | 2013-08-14 | 2013-12-25 | 中国电子科技集团公司第十六研究所 | High-frequency electrodeless lamp based on micro-channel heat pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20140104 |