KR20150023173A - Electrodeless discharge lamp - Google Patents

Abstract

The present invention relates to an electrodeless discharge lamp which includes a discharge tube which is filled with discharge gas, mercury, and activated carbon component. It includes a discharge tube which has a fluorescent layer coated on an inner side and is filled with discharge gas and mercury; a ferrite core installed to the discharge tube; and an induction coil wound around the ferrite core. The discharge tube is filled with the activated carbon component, thereby replacing mercury with it and contributing to environmental protection.

Description

[0001] Electrodeless discharge lamp [0002]

The present invention relates to an electrodeless discharge lamp in which an active carbon component is enclosed in a discharge tube filled with a discharge gas and mercury.

The electrodeless discharge lamp excites a discharge gas enclosed in a bulb by a high frequency electromagnetic field generated by flowing a high frequency current through an induction coil, and the emitted ultraviolet rays are converted into visible light by the fluorescent material.

Since the electrodeless discharge lamp device has a structure in which no electrode is provided therein, there is no negative light due to deterioration of the electrode, and the life span is longer than that of a general fluorescent lamp.

For example, in the electrodeless discharge lamp disclosed in Japanese Unexamined Patent Publication No. 7-272688 or Japanese Utility Model Application Laid-Open No. 6-5006, a bismuth-indium-mercury amalgam is used as a source of mercury vapor I am using it. This amalgam has the advantage of being able to obtain stable and high light output in the electrodeless discharge lamp even if the ambient temperature changes to a wide range by using it.

However, since the use of mercury as described above is adversely affecting the environment, there is a need to reduce or replace the amount of mercury used.

The present invention has been made in order to solve the above-mentioned problems, and it is proposed to enclose an activated carbon component in an electrodeless lamp in order to reduce or replace the amount of mercury used. In addition, The amount of activated carbon to be sealed in the discharge tube of the present invention is proposed.

An electrodeless discharge lamp according to the present invention includes: a discharge tube coated with a phosphor film on an inner surface thereof and filled with a discharge gas and mercury; A ferrite core installed in the discharge tube; And an induction coil wound around the ferrite core, wherein an activated carbon component is sealed in the discharge tube and operated.

The activated carbon component is enclosed in the discharge tube in the form of activated carbon powder, and is filled with the mercury at a rate of 1 to 2 times the weight of the mercury.

According to the present invention, it is possible to produce an electrodeless lamp in which the electrode activated carbon is used in a non-electrode lamp with little or no mercury, and thus can be regarded as an eco-friendly lighting device in addition to an LED.

In addition, it is expected to have a huge import substitution effect by preempting the technological advantage over the technology of the electrodeless lamp of advanced countries, and it can contribute to national energy saving as a high efficiency lighting device.

1 is an operation block diagram of an electrodeless discharge lamp according to an embodiment of the present invention
Fig. 2 is a graph for comparing the performance of the activated carbon filled with the mercury enclosed in the lamp (discharge tube)
3 is a graph comparing the luminous flux maintenance rate of the electrodeless lamp using mercury and the luminous flux maintenance rate of the electrodeless lamp to which activated carbon is added
4 is a graph showing the results of the accelerated life test of the electrodeless lamp using activated carbon
5 is an example of luminous flux measurement of an electrodeless lamp using mercury.
6 is an example of luminous flux measurement of an electrodeless lamp using activated carbon.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the embodiments of the present invention, substantially the same contents will not be described in detail.

Also, when a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

Also, when it is stated that an element is formed, formed or constituted, it should be interpreted as substantially the same unless otherwise defined.

In addition, since the activated carbon in the present invention means carbon material, the ratio of the carbon material in the practical example of the present invention is not limited.

It should also be understood that the discharge lamp or lamp described in the present invention is described with the discharge tube in mind, since the embodiment of the present invention relates to a discharge tube which is a component of the (discharge) lamp.

The technical idea according to the embodiment of the present invention will be described below with reference to the respective drawings.

1 is an operational block diagram of an electrodeless discharge lamp according to an embodiment of the present invention.

As shown in Fig. 1, a discharge tube 10 having a phosphor film (not shown) coated on its inner surface and a discharge gas and mercury (not shown) sealed therein; A ferrite core (20) installed on the discharge tube; And an induction coil (21) wound on the ferrite core,

FIG. 2 is a block diagram of an electrodeless discharge lamp in which an activated carbon component (not shown) is sealed in the discharge tube.

In addition, the discharge tube 10 may be provided with a mercury amalgam filler inlet 23 and an activated carbon filler inlet 24, and each inlet is filled with mercury (amalgam) or activated carbon powder.

A lighting device 30 including a high frequency power source 31 connected to the ferrite core 20 and / or the coil 21 is formed.

A ferrite core 20 which is formed of a translucent material and which is arranged in a manner to surround a predetermined portion of a loop-shaped discharge tube 10 in which a discharge gas of argon gas or the like and mercury vapor are enclosed, And a lighting device (30) including an induction coil (21) wound around the core and a high frequency power source (31) connected to each induction coil for applying a high frequency current.

In the electrodeless discharge lamp shown in FIG. 1, when a high frequency current of several hundreds kHz is applied from the high frequency power source 31 to the induction coil 21, electromagnetic induction is generated inside the discharge tube 10 constituting the electrodeless discharge lamp The generated induced electric field acts on the discharge gas sealed inside the discharge tube to generate discharge, and the mercury existing in the discharge tube enters the excited state, and ultraviolet rays are generated. That is, electrons are accelerated in the discharge tube to generate plasma, and ultraviolet rays emitted from the plasma stimulate phosphors coated in the discharge tube to emit visible light.

In such a configuration, the activated carbon component can be injected into the discharge tube through the activated carbon inlet 24. At this time, the activated carbon component is enclosed in the discharge tube through the injection port 24 in the form of activated carbon powder, and it is preferable that the activated carbon component is sealed at 1 to 2 times the weight of mercury to be encapsulated.

The discharge tube 10 is generally composed of a plurality of the discharge tubes 10 and is integrally assembled with each other. For convenience of description, the discharge tube on the upper side in FIG. 1 is referred to as a first discharge tube 11, 1, the discharge tube on the lower side is referred to as a second discharge tube 12, and the powder of activated carbon is sealed in the second discharge tube. Therefore, it is preferable that the weight of the activated carbon powder sealed in the second discharge tube is 1-2 times (6-12 mg) with respect to the weight of mercury (for example, 6 mg) sealed in the first discharge tube.

Of course, the activated carbon powder may be sealed in the first discharge tube, and mercury may be sealed in the second discharge tube, and the technical idea of operation is the same. In addition, each component (mercury, activated carbon powder) may be mixed with each of the discharge tubes 11 and 12 and sealed. However, the overall difference in the weight of the activated carbon component with respect to the weight of mercury is preferably 1-2 times as described above. The threshold of the weight ratio can be confirmed by the following.

FIG. 2 is a chart for illustrating Table 1 below comparing the performance (luminous flux) in the apparatus of FIG. 1 according to the weight of activated carbon to be encapsulated with respect to the weight of mercury enclosed in a lamp (discharge tube) in the embodiment of the present invention.

Experimental Case       Mercury (mg)       Activated carbon (mg)       The luminous flux (lm)   One          6           0        10,200   2          6           2        10,220   3          6           6        10,340   4          6           8        10,400   5          6           10        10,480   6          6           12        10,330   7          6           14        10,280

As described above, when the activated carbon powder of 1 to 2 times (experimental case 3 - case 6) is filled in the mercury enclosed in the discharge tube 10, excellent results are obtained in terms of performance (luminous flux) Also, it can be seen that the threshold value is formed. On the other hand, as shown in Experimental Cases 6 and 7, even when the weight of activated carbon is twice as much as the weight of mercury, a value twice as large as the case of doubling is set as a critical value.

3 is a graph comparing the luminous flux maintenance rate (Sample 1) of the electrodeless lamp using mercury and the luminous flux maintenance rate (Sample 2) of the electrodeless lamp to which activated carbon is added as in Experimental case 5, to be.

As shown in FIG. 3, when the activated carbon powder was sealed in a discharge tube, and the high frequency power was applied through the apparatus according to FIG. 1 to measure the luminous flux retention rate, the luminous flux retention rate was more than the reference value (10,000 lm) (Target value 90%) (51,61), and it is not problematic in terms of performance.

4 is a graph showing the results of the accelerated life test of the electrodeless lamp using activated carbon.

As shown in FIG. 4, the electrodeless lamp of the embodiment of the present invention in which activated carbon powder was enclosed showed a result of a long life test of 60,000 hours or more, maintained a luminous flux of a predetermined luminous flux (70%) or more, , Metal halide lamps, and the like. Accordingly, it can be seen that the discharge lamp in the case where the activated carbon component of the embodiment of the present invention is sealed has a great energy saving effect.

5 is an example of luminous flux measurement of an electrodeless lamp using mercury.

(10200) (51) measured in Experimental case 1 of Table 1 above.

6 shows an example of luminous flux measurement of the electrodeless lamp using activated carbon.

The measured fluxes (10480) and (6180) in the experimental case 5 of Table 1 are shown.

As shown in Tables 1, 2, 3, 4, 5, and 6, it can be seen that the activated carbon component is satisfactory in terms of performance in the case of 1-2 times of the mercury weight, It can be confirmed that there is a sufficient possibility and can greatly contribute to environmental protection.

Meanwhile, as another embodiment of the present invention, the ratio of the mercury to the activated carbon component may be implemented as follows.

Experimental Case            Mercury (mg)         Activated carbon (mg)     One               3            10     2               0            10

As shown in Table 2, the amount of mercury in Table 1 may be varied to operate the electrodeless lamp, and the effect is substantially the same as in Table 1.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. It is to be understood that the terms "comprises", "comprising", or "comprising" as used herein are meant to imply that the components may be present unless specifically stated to the contrary, But should be construed to include other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Lamp
20: Ferrite core, 21: Induction coil, 23/24: Injection hole
30: a lighting device, 31: a high frequency power source

Claims (3)

A discharge tube coated with a phosphor film on the inner surface thereof and filled with a discharge gas and mercury;
A ferrite core installed in the discharge tube; And
And an induction coil wound around the ferrite core,
And an activated carbon component is sealed in the discharge tube. The electrodeless discharge lamp according to claim 1, wherein the activated carbon component is enclosed in the discharge tube in the form of powder of activated carbon, and is filled with the mercury by 1 to 2 times the weight of the mercury. The electrodeless discharge lamp according to claim 2, wherein the discharge tube comprises a plurality of discharge tubes, and the weight of activated carbon powder sealed in the second discharge tube is 1-2 times the weight of mercury sealed in the first discharge tube.

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