KR100690675B1 - Impedance matching control device for plasma lighting system - Google Patents

Abstract

The present invention relates to an impedance matching control device for an electrodeless lighting device, comprising: a magnetron generating electromagnetic waves, a light bulb excited by an electromagnetic wave generated from the magnetron, and a light emitting material emitting an encapsulation material; In an electrodeless illuminator including a resonator for transmitting light and a waveguide for transmitting microwaves generated from a magnetron to the resonator, at least one of the waveguide or the resonator has a protrusion height so as to match the impedance of electromagnetic waves. By installing and configuring a plurality of matching stubs that can be adjusted, the width of the system becomes smaller, so that the restriction of the space to be installed when installing in a narrow installation space, thereby increasing the utilization of the system.

Description

Impedance matching control device for induction lighting equipment {IMPEDANCE MATCHING CONTROL DEVICE FOR PLASMA LIGHTING SYSTEM}

1 is a longitudinal sectional view showing an example of a conventional electrodeless lighting device;

2 is a longitudinal sectional view showing an example of the electrodeless illuminator of the present invention;

FIG. 3 is a detailed view of part “A” of FIG. 2;

** Description of symbols for the main parts of the drawing **

11: casing 12: magnetron

13 high pressure generator 14 waveguide

14a: stub hole 15: bulb

16: resonator 17: reflection shade

18: dielectric mirror 20: matching stub

21: thread

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrodeless illuminator, and more particularly, to an impedance matching control apparatus of a pole electrode illuminator capable of finely adjusting impedance matching between a magnetron, a waveguide, and a light bulb after assembling the product.

In general, a lighting apparatus using electromagnetic waves is a device that applies electromagnetic waves to an electrodeless plasma bulb to emit visible light or ultraviolet rays therefrom, and has a longer lamp life and excellent lighting effect than conventional incandescent or fluorescent lamps.

1 is a longitudinal cross-sectional view showing an example of a conventional electrodeless lighting device using electromagnetic waves.

As shown in the drawing, the conventional electrodeless lighting device includes a magnetron 2 mounted inside the casing 1 to generate microwaves, and a high voltage generator 3 for boosting and supplying commercial AC power to the magnetron 2 at a high pressure. ), A waveguide (4) communicating with the outlet of the magnetron (2) and delivering microwaves generated by the magnetron (2), and encapsulated by microwave energy enclosed with a luminescent material therein and transmitted through the waveguide (4). A light bulb 5 which emits light while being excited by a substance is plasma-covered, and is disposed in front of the waveguide 4 and the light bulb 5 to block microwaves while passing light emitted from the light bulb 5. The resonator 6 to accommodate the resonator 6, the reflector 7 for intensively reflecting light generated from the light bulb, and the inside of the resonator 6 at the rear side of the light bulb 5. Light reflects oil field And it consists of a mirror (8), a cooling fan 9 for cooling the magnetron 2 and the high voltage generator 3, and provided at one side of the casing (1).

The waveguide 4 is coupled to the bulb 5 and the resonator 6 on one side thereof, while the side wall has a cylindrical portion with a space therein so as to insert and engage the outlet (unsigned) of the magnetron 2. Forming.

In the drawings, reference numeral M1 denotes a bulb motor for rotating a light bulb, and M2 denotes a fan motor for rotating a cooling fan.

The lighting system using the conventional microwave as described above operates as follows.

That is, when the control unit inputs a driving signal to the high pressure generator 3, the high pressure generator 3 boosts AC power to supply the boosted high pressure to the magnetron 3, and the magnetron 2 oscillates by the high pressure. Generates microwaves having a high frequency, the microwaves are emitted through the waveguide 4 into the resonator 6 to discharge the encapsulated material in the bulb 5 to generate light having a unique emission spectrum, This light was reflected by the reflector 7 and the dielectric mirror 8 to brighten the space.

However, in the conventional electrodeless illuminator as described above, if the impedance between the bulb 5 and the electromagnetic wave unit (magnetron, waveguide, resonator) is not matched, the resonance frequency of the electromagnetic wave is not properly excited and the bulb 5 Even if the initial discharge is not or is not discharged, most of the power is not absorbed well by the light bulb 5, so that the luminous flux is not only lowered significantly but the overall efficiency may be lowered. There was a problem in that the impedance matching between the waveguide 4, the resonator 6, and the bulb 5 could not be finely adjusted.

The present invention has been made in view of the above problems of the conventional lighting apparatus using electromagnetic waves, and impedance matching of the electrodeless lighting apparatus which can finely adjust the impedance matching between the magnetron, the waveguide, the resonator and the bulb after assembly of the apparatus. It is an object of the present invention to provide a control device.

In order to achieve the object of the present invention, a magnetron for generating electromagnetic waves, a light bulb excited by an electromagnetic wave generated from the magnetron emits light, and a resonator that receives the light bulb traps the electromagnetic wave while transmitting the light generated from the light bulb And a waveguide for transmitting a microwave generated from a magnetron to a resonator, wherein at least one of the waveguide or the resonator is provided with a plurality of matching stubs to match the impedance of electromagnetic waves. Provided is an impedance matching control device for an electrodeless lighting device.

EMBODIMENT OF THE INVENTION Hereinafter, the impedance matching control apparatus of the electrodeless illuminating device by this invention is demonstrated in detail based on one Example shown in an accompanying drawing.

Figure 2 is a longitudinal sectional view showing an example of the electrodeless illuminator of the present invention, Figure 3 is a detailed view of the "A" portion of FIG.

As shown in the drawing, the electrodeless illuminator using electromagnetic waves according to the present invention includes a magnetron 12 mounted inside the casing 11 to generate microwaves, and boosting commercial AC power to the magnetron 12 at a high pressure. The high pressure generator 13 to be supplied and the outlet of the magnetron 12 communicate with each other the microwave generated by the magnetron 12, and several matching stubs 20 for impedance matching therein. Waveguide 14 having a light emitting material and the light emitting material is encapsulated and the light emitting material is plasma generated by the electromagnetic wave energy transmitted through the waveguide 14, the light bulb 15, the waveguide 14 and the light bulb ( 15 is covered in front of the resonator 16 to block the microwave while passing the light emitted from the bulb 15, the reflector 17 to accommodate the resonator 16 to reflect the light generated from the bulb to go straight and And a dielectric mirror 18 mounted inside the resonator 16 at the rear side of the light bulb 15 and reflecting light while passing electromagnetic waves, and a magnetron 12 and a high pressure generator 13 provided at one side of the casing 11. It consists of a cooling fan 19 which cools.

The waveguide 14 couples the above-described bulb 15 and the resonator 16 to one side end thereof, while a space portion is inserted into the opposite end portion to insert and engage the outlet (unsigned) of the magnetron 12. To form a rectangle. In addition, one or more matching stubs 20 may be installed on the side surface of the waveguide 14, that is, on the surface on which the magnetron 12 and the resonator 13 are mounted, or on opposite sides thereof or on both end portions thereof. The matching stub 20 has a better matching effect on the opposite side of the magnetron 12 than the surface on which the magnetron 12 is mounted, considering the flow of electromagnetic waves generated from the magnetron 12. Mounting on the side is excellent matching effect.

In addition, in the case where a plurality of matching stubs 20 are provided as shown in FIG. 3, it is preferable to mount the spacing between the stubs 20 about 1/4 of the wavelength in the tube of the waveguide 14.

The matching stub 20 is preferably screwed to the waveguide 14 so as to finely match the impedance of the electromagnetic wave while adjusting the protrusion height after assembling the entire luminaire. To this end, a thread 21 is formed on the outer circumferential surface of the matching stub 20, and a thread (unsigned) is also formed in the stub insertion hole 14a of the waveguide 14 corresponding thereto.

Meanwhile, the matching stub 20 may be installed in the resonator 16. In this case, the matching stub may be screwed so as to finely match the impedance after assembling the entire lighting device.

In the drawings, the same reference numerals are given to the same parts as in the prior art.

Reference numeral M1 in the drawings denotes a bulb motor for rotating the bulb, and M2 is a fan motor for rotating the cooling fan.

Effects of the impedance matching control device of the electrodeless lighting device of the present invention as described above are as follows.

That is, when the high pressure generator 13 boosts AC power and supplies the boosted high pressure to the magnetron 12, the magnetron 12 generates electromagnetic waves by oscillating by high pressure, and the electromagnetic waves are resonators through the waveguide 14. (16) Light is generated by discharging the encapsulated material in the light bulb 15 while radiating inside, and the light brightens the space while reflecting forward by the reflector 17 and the dielectric mirror 18.

Here, the matching stub 20 is mounted inside the waveguide 14 or the resonator 16 so as to protrude by a predetermined height, and thus, between the magnetron 12, the waveguide 14, the resonator 16, and the light bulb 15. The impedance of the can be matched to facilitate the initial discharge or total discharge can increase the light efficiency of the electrodeless lighting device using electromagnetic waves. In particular, the matching stub 20 of the present invention is screwed so as to adjust the protrusion height (insertion depth) to the lighting device, even if a machining error or assembly error between the components when the assembly of the lighting device occurs as described above The matching stub 20 can be tightened or loosened after assembly of the lighting device to finely adjust the actual resonant frequency of the electromagnetic waves oscillating from the magnetron 12 to match the initially designed resonant frequency, thereby further increasing the light efficiency of the lighting device. have.

Impedance matching control device of the electrodeless lighting device according to the present invention, by screwing the matching stub to the waveguide or resonator, it is possible to arbitrarily adjust the protrusion height of the matching stub even after the assembly of the lighting equipment, through which the resonance frequency of the electromagnetic wave The impedance can be finely adjusted so that the impedance can be maintained properly, thereby increasing the light efficiency of the lighting device.

Claims (3)

A magnetron that generates electromagnetic waves, a light bulb that is excited by electromagnetic waves generated by the magnetron, and a light emitting material encapsulates, a resonator that receives light and traps electromagnetic waves while emitting light from the light bulb, and a microwave generated by the magnetron. In the electrodeless illuminator including a waveguide for transmitting to Impedance matching control device of the electrodeless lighting device, characterized in that a plurality of matching stubs are provided on at least one of the waveguide or the resonator to match the impedance of the electromagnetic wave. The method of claim 1, The matching stub is an impedance matching control device of the electrodeless illuminator, characterized in that the screw coupling to the waveguide or resonator to finely control the height of the projection. The method according to claim 1 or 2, The matching stub is an impedance matching control device of the electrodeless lighting device, characterized in that the mutual spacing is 1/4 of the wavelength in the tube.

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