KR20030067400A - Cooling apparatus for magnetron and plasma lighting system with that - Google Patents

Abstract

PURPOSE: A magnetron cooling apparatus and an electrodeless illumination system are provided to protect the illumination system from water or foreign substances, while reducing or eliminating fan noises. CONSTITUTION: A magnetron cooling apparatus comprises a cathode unit for generating thermal electrons when a current is applied; an anode unit having a space for accommodating the cathode unit, and cooperating with the cathode unit so as to generate a high frequency energy in the space; a plurality of magnets(14A,14B) disposed at both sides of the space of the anode unit in such a manner that the magnets apply a flux to the space; a thermoelement(110) for attaching conductors or semiconductors of different type to the anode unit in such a manner that the heat generated from the space is absorbed and radiated when a current is applied to the thermoelement; and a voltage difference generator(130) connected to the thermoelement, and which applies a current to the thermoelement.

Description

Cooling device of magnetron and electrodeless lighting system having same {COOLING APPARATUS FOR MAGNETRON AND PLASMA LIGHTING SYSTEM WITH THAT}

The present invention relates to a cooling device of a magnetron and an electrodeless illumination system having the same, and more particularly, to a cooling device of a magnetron that cools heat generated in a magnetron using a thermoelectric element, and an electrodeless illumination system having the same.

As is known, magnetrons used in microwave or microwave lighting systems convert electrical energy into high-frequency energy, such as microwaves, and induce the generated high-frequency energy into the microwave's cooking chamber to cook food or resonate with the lighting system. It induces to excite the light emitting material in the bulb to generate light.

As shown in FIG. 1, the magnetron has a main body 10 for generating microwaves, an input unit 20 formed on one side of the main body 10 to receive power, and the other of the main body 10. It is formed in the output part 30 formed in the side and outputs the microwave which generate | occur | produced in the main-body part 10 to a system.

The main body portion 10 is formed on the outer side of the vane 12 and the plurality of vanes 12 forming the cathode and installed in the longitudinal direction at the center of the center, and the anode and the periphery of the filament 11 Cylindrical anode cylinder 13 which forms working space to generate high frequency energy, and upper magnet 14A and lower magnet 14B which are respectively installed on the upper and lower sides of the anode cylinder 13 to apply magnetic flux to working space. ), A box pole 15A and a defect pole 15B forming a magnetic closed circuit together with the magnets 14A and 14B, and a yoke top plate 16A and a yoke bottom plate 16B, and a filament 11 with a current applied thereto. Center lead 17A and side lead 17B connected to the input unit, and cooling fins 18 are formed between the outer circumferential surface of the anode cylinder 13 and the inner circumferential surface of the lower yoke plate 16B to form a heat dissipation area. have.

The input unit 20 is connected to the filter box 21 mounted on the lower surface of the yoke lower plate 16B of the main body 10, and to the center lead 17A and the side lead 17B of the main body 10, respectively. A plurality of choke coils 22 to prevent leakage and a high-pressure through-type condenser 23 connected to the choke coil 22 and electrically connected to an external power supply terminal (not shown).

The output unit 30 includes an antenna 31 for guiding high frequency energy generated inside the anode cylinder 13 to the outside, and an antenna cap 32 accommodating the antenna 31.

In the drawings, reference numeral 19 denotes a gasket.

The conventional magnetron as described above operates as follows.

That is, when a current is applied to the filament 11 through the center lead 17A and the side lead 17B, hot electrons are emitted from the filament 11, which is a cathode, and the hot electrons are vanes, which are anodes and filaments 11, which are cathodes. High frequency energy is emitted by the strong electric field and the magnetic field applied between 12 and the anode cylinder.

The high frequency energy is radiated to the waveguide of the microwave oven or the lighting system through the antenna 31, while the radiated high frequency energy is dissipated as heat and radiated to the outside through the cooling fin 18.

Here, in order to increase the cooling efficiency of the cooling fins 18, a cooling fan 18 is usually mounted on one side of the magnetron, and a forced air cooling system for forcibly sucking external cold air and blowing it to the magnetron is mainly used. .

The electrodeless illumination system to which the forced air cooling system of the magnetron is applied is shown in FIG. 2.

As shown in the drawing, the conventional electrodeless illumination system includes a magnetron M mounted inside the casing 1 to generate microwaves, and a high voltage generator 3 for boosting and supplying commercial AC power to the magnetron M at a high pressure. ), A waveguide (4) communicating with the outlet of the magnetron (M) and transmitting microwaves generated by the magnetron (M), and a material encapsulated by the microwave energy are excited to form a plasma while excited. The light bulb 5, the waveguide 4, and the front of the light bulb 5 are covered in front of each other, and the microwaves are blocked to allow light to pass through, and the resonator 6 is accommodated so that the light generated from the light bulb can go straight. It consists of the reflecting mirror 7 which intensively reflects, and the cooling fan assembly 8 which is provided in one side of the casing 1, and cools the magnetron M and the high-pressure generator 3. As shown in FIG.

The casing 1 forms an air inlet 1a at the lower half corresponding to the cooling fan 8b to be described later, and an air outlet at the upper half of the casing 1 corresponding to the magnetron M and the high pressure generator 3, respectively. 1b).

The cooling fan assembly 8 is coupled to the fan motor 8a mounted inside the casing 1 and the rotating shaft of the fan motor 8a to suck in outside air, and then the magnetron M or the high pressure generator 3. It consists of a cooling fan (8b) for blowing.

In the figure, reference numeral 9 denotes a dielectric mirror.

The conventional electrodeless illumination system 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 M, and the magnetron M is oscillated by the high pressure. Generates microwaves with a high frequency, the microwaves radiate 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 illuminates the space while reflecting forward by the reflector 7 and the dielectric mirror 9.

At this time, in the magnetron (M), since high heat is generated as described above, the fan motor (8a) is operated to cool the cooling fan (8b) is rotated, and together with the air inlet (1a) of the casing (1) The outside air was sucked and passed through the inside of the casing (1) to cool the magnetron (M) and the high pressure generator (3) and then discharged through the air outlet (1b).

However, there are some problems when applying the conventional air-cooled magnetron as described above to an electrodeless illumination system.

First, when the electrodeless lighting system is installed outdoors, rain water or the like flows into the casing 1 through the air inlet 1a of the casing 1 by the suction pressure when the cooling fan 8b is driven. There was a risk of corrosion of various parts or damage of the whole system.

In addition, when the electrodeless lighting system is installed indoors, there is a fear that the user may cause discomfort to the user due to the flow noise or the fan noise generated during the operation of the cooling fan 8b.

The present invention has been made in view of the problems of the conventional air-cooled magnetron and the electrodeless lighting system equipped with the magnetron, and improves the cooling method of the magnetron so that rainwater does not penetrate even when the electrodeless lighting system is installed outdoors. It is an object of the present invention to provide a magnetron cooling device and an electrodeless illumination system having the same, which can prevent noise while being installed indoors, while preventing the installation.

1 is a longitudinal sectional view showing an example of a conventional magnetron;

Figure 2 is a longitudinal sectional view showing an example of an electrodeless illumination system equipped with a conventional magnetron.

Figure 3 is a longitudinal sectional view showing a cooling device of the magnetron of the present invention.

Figure 4 is a plan view showing a device mounting plate in the cooling device of the present invention magnetron.

Figure 5 is a longitudinal sectional view showing an example of an electrodeless illumination system with a cooling device of the magnetron of the present invention.

Figure 6 is a longitudinal sectional view showing a modification of the electrodeless illumination system with a cooling device of the present invention magnetron.

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

1: Casing 1c: Cooling Fin

1d: Air vent 1e: Gatbu

4: waveguide 5: light bulb

6: resonator 7: reflector

10 main body 11 filament

12: vane 13: anode cylinder

14A, 14B: Magnet 15A, 15B: Box pole and defect pole

16A, 6B: Yoke top and yoke bottom 17A, 17B: Center lead, side lead

19: gasket 20: input

21: filter box 22: choke coil

30: output unit 31: antenna or

32: antenna cap 110: thermoelectric element

120: device mounting plate 130: voltage difference generator

140: lead wire

In order to achieve the object of the present invention, when the current is applied to the anode portion having a cathode portion for generating hot electrons, and a working space accommodating the cathode portion in the working space to generate high frequency energy together with the cathode portion, the working space A plurality of magnets are disposed on both sides of the working space to apply magnetic flux, and different types of conductors or semiconductors are connected to the anode part to absorb and dissipate heat generated in the working space when current is applied. A magnetron cooling device including a thermoelectric element and a voltage difference generator for connecting a thermoelectric element with a wire and applying a current to the thermoelectric element is provided.

In addition, a light bulb having an encapsulating material to generate light while plasmaizing by microwaves, a resonator through which light emitted from the light bulb passes while receiving a light bulb and blocking microwaves, an anode part, a cathode part, and a magnet Magnetron mounted inside the casing to generate microwaves when applying current to the cathode, and different types of conductors or semiconductors are connected to absorb heat generated by the magnetron when applying current, and the anode part of the magnetron Electrodeless lighting system including a thermoelectric element attached to the thermoelectric element, a voltage difference generator for connecting a thermoelectric element with a wire to apply a current to the thermoelectric element, and a heat dissipation means for dissipating heat radiated through the thermoelectric element to the outside of the casing. To provide.

Hereinafter, a magnetron cooling apparatus and an electrodeless illumination system having the same according to the present invention will be described in detail with reference to an embodiment shown in the accompanying drawings.

Figure 3 is a longitudinal cross-sectional view showing a cooling device of the magnetron of the present invention, Figure 4 is a plan view showing an element mounting plate in the cooling device of the magnetron of the present invention, Figure 5 is an electrodeless lighting system having a cooling device of the magnetron of the present invention. 6 is a vertical cross-sectional view showing an example, and FIG. 6 is a vertical cross-sectional view showing a modification of the electrodeless lighting system including the cooling device of the magnetron of the present invention.

As shown, the magnetron cooling apparatus according to the present invention includes a cylindrical anode cylinder that receives the filament 11 forming the cathode and the vane 12 forming the anode and generates high frequency energy between the cathode and the anode ( 13, a main body 10 having a main body 10, an input unit 20 provided on one side of the main body 10, and receiving power, and a main body 10 formed on the other side of the main body 10. Thermoelectric element that is attached to the output unit 30 for outputting the microwave generated by the system to the outer peripheral surface of the anode cylinder 13 of the main body unit 10 and radiates heat generated in the working space of the anode cylinder 13 110.

Here, as shown in FIG. 4, the thermoelectric element 110 is formed in a flat plate shape in order to increase efficiency, so that the outer surface of the cylindrical anode cylinder 13 and the thermoelectric element 110 have a flat other side mounting plate ( It is preferable to interpose 120) closely.

In addition, the thermoelectric element 110 connects the ends of different kinds of conductors or semiconductors, and has a Peltier effect that absorbs heat on one side and emits heat on the other side according to a potential energy difference. It is preferable to apply the used element.

To this end, a voltage difference generator 130 capable of supplying a voltage difference to the thermoelectric element 110 is disposed on one side of the thermoelectric element 110, and the anode of the voltage difference generator 130 is connected to the thermoelectric element 110. (140).

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

In the figures, 14A and 14B are magnets, 15A and 15B are box and defect poles, 16A and 16B are yoke and yoke plates, 17A and 17B are center leads and side leads, 19 is a gasket, 21 is a filter box 22 is the choke coil, 31 is the antenna and 32 is the antenna cap.

The magnetron cooling apparatus of the present invention as described above has the following effects.

That is, when a current is applied to the filament 11 through the center lead 17A and the side lead 17B, hot electrons are emitted from the filament 11, which is a cathode, and the hot electrons are the filament 11 and the anode, which are cathodes. The high frequency energy is emitted by a strong electric field and a magnetic field applied between the in vane 12 and the anode cylinder 13, and part of the high frequency energy that is not radiated is lost by heat to overheat the magnetron.

At this time, when a current is applied to the thermoelectric element 110 by the voltage difference generator 140, heat generated in the anode cylinder 13 of the magnetron is absorbed through the thermoelectric element 110, and then radiates heat and eventually overheats the magnetron. Will be prevented.

An example of applying the magnetron cooling device to the electrodeless illumination system is as shown in FIG. 4.

As shown in the drawing, the electrodeless lighting system of the present invention includes a magnetron (M) mounted inside the casing (1) to generate microwaves, and a high voltage generator (1) that boosts and supplies commercial AC power to the magnetron (M) at a high pressure. 3), the waveguide 4 which communicates with the outlet of the magnetron M and transmits the microwaves generated by the magnetron M, and the substance enclosed by the microwave energy is excited to form plasma while being excited. The light bulb 5 and the waveguide 4 and the front surface of the light bulb 5 are generated so that microwaves are blocked and light passes through the resonator 6 and the resonator 6 is received to generate the light bulb 5. Reflector 7 for intensively reflecting light straight through, a thermoelectric element 110 attached to the magnetron M to absorb and radiate heat generated from the magnetron M, and a conductive wire 140 to the thermoelectric element 110. To supply current And a voltage difference generator 130 mounted inside the casing 1.

The casing 1 is formed in a hermetic form and is formed by integrally forming a plurality of cooling fins 1c on its outer surface, or by fabricating them separately and combining them in post-assembly.

In addition, an air vent 1d is formed at one side of the casing 1 so as to discharge heat radiated from the thermoelectric element 110 to the outside, and the thermoelectric element 110 is disposed around the air vent 1d. Discharge fan 150 for blowing out the heat to radiate through the outside may be mounted.

In this case, the air vent 1d is preferably formed on the lower surface of the air outlet 1d so that rainwater does not leak in consideration of the case where the electrodeless lighting system is installed outdoors. It is also preferable to protrude.

The thermoelectric element 110 is a device using a Peltier effect that connects the ends of different types of conductors or semiconductors to absorb heat on one side and to release heat on the other side according to the potential energy difference between them It is preferable to apply.

In addition, as the thermoelectric element 110 is formed in a flat plate shape, an element mounting plate 120 having a flat outer surface is closely contacted between the outer circumferential surface of the anode cylinder 13 of the cylindrical magnetron M and the thermoelectric element 110. It is preferable to interpose.

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

In the figure, reference numeral 9 denotes a dielectric mirror.

The electrodeless illumination system of the present invention has the following effects.

That is, microwaves generated by the magnetron M radiate into the resonator 6 through the waveguide 4, and discharge the encapsulated material in the light bulb 5 by the microwaves to generate light having a unique emission spectrum. This light illuminates the space while reflecting forward by the reflector 7 and the dielectric mirror 9.

At this time, in the magnetron (M), as described above, high heat is generated, but the heat is naturally radiated to the inside of the casing (1) through the thermoelectric element (110) to cool the magnetron (M).

In this way, when the electrodeless lighting system of the present invention is installed outdoors, rain water or foreign matter may flow into the casing 1 and damage various components therein. However, the magnetron M may be damaged as in the present invention. By attaching the thermoelectric element 110 to the heat dissipation heat generated from the magnetron (M) can form the casing (1) in a sealed type to effectively prevent rain or other foreign matter from entering the casing (1). Can be.

In addition, in order to more effectively discharge the heat emitted from the thermoelectric element 110, an air vent 1c is formed in the casing 1, and the discharge fan 150 is provided even if the discharge fan 150 is provided so as to correspond to the air vent 1c. Since 150 blows out the air of the casing (1), it is possible to reduce the amount of rain water to flow through the air inlet (1d).

In addition, the air vent 1d is also formed so that it is always located on the bottom surface according to the installation form of the system, and when the shaded portion 1e which is inclined downward is formed on the outside or the inside of the air vent 1d, rain water and foreign matters seep into it. You can further reduce the space.

On the other hand, in the case of installing the electrodeless lighting system of the present invention indoors, the user may feel comfortable when noise is reduced. As shown in FIG. 5, the heat of the magnetron (M) is used as the thermoelectric element 110 without using a separate fan. In addition to the heat dissipation, the heat can be reduced by mounting the cooling fan 1c in the casing 1 and discharging the operation of the lighting system.

In addition, even when using the discharge fan 150 as shown in Figure 6 can be used a fan with a small capacity can reduce the system noise by that much.

Although not shown in the drawings, the casing is connected to air by connecting one end of the heat pipe to the heat dissipation side of the thermoelectric element and connecting the other end of the heat pipe to the casing to transfer the generated heat of the magnetron emitted through the thermoelectric element to the casing. It may also be allowed to cool naturally.

In this case, it is possible to further reduce noise when installing indoors by not using a fan, and to prevent rainwater or foreign matter from flowing in when installed outdoors because it does not have to form an air vent in the casing.

In addition, the voltage difference generator 130 may be mounted outside the casing 1. In this case, the conductor 140 may be extended to extend the voltage difference generator 130 and the thermoelectric element 110 inside the casing 1. By connecting the plurality of lighting systems may be connected to one voltage difference generator 130 together, or may reduce the capacity or weight of each lighting system.

The magnetron cooling apparatus and the electrodeless lighting system having the same according to the present invention comprise a magnetron to emit heat generated at the anode portion using a thermoelectric element, and a magnetron equipped with the thermoelectric element. By constructing the lighting system, it is possible to prevent rainwater or foreign matter from entering the casing of the system when the electrodeless lighting system is installed outdoors, and effectively reduce or eliminate fan noise when installed indoors. have.

Claims (10)

A cathode portion for generating hot electrons when a current is applied; An anode part having a working space accommodating the cathode part and generating high frequency energy together with the cathode part in the working space; A plurality of magnets disposed on both sides with the working space therebetween to apply magnetic flux to the working space, A thermoelectric element which connects different types of conductors or semiconductors and attaches them to the anode to absorb heat generated in the working space upon application of current; Cooling device for magnetron including a voltage difference generator that connects the thermoelectric element with a wire and applies current to the thermoelectric element. The method of claim 1, And a device mounting plate having a flat portion between the anode portion and the thermoelectric element so as to flatten the attachment surface of the thermoelectric element. A light bulb having an encapsulating material for generating light while being plasmalized by microwaves, A resonator that receives a light bulb and blocks microwaves while passing light emitted from the light bulb; A magnetron having an anode portion, a cathode portion and a magnet mounted inside the casing to generate microwaves when a current is applied to the cathode portion; A thermoelectric element which connects different kinds of conductors or semiconductors and attaches them to the anode part of the magnetron so as to absorb heat generated from the magnetron when heat is applied, and then radiate heat; Electrodeless lighting system including a voltage difference generator for connecting a thermoelectric element with a wire and applying current to the thermoelectric element. The method of claim 3, An electrodeless illumination system, characterized in that the cooling fins are integrally or post-assembled on the outer surface of the casing. The method of claim 3, An electrodeless illumination system, characterized in that an air vent is formed in the casing, and a discharge fan is provided adjacent to the air vent so as to discharge heat radiated from the thermoelectric element to the outside of the casing. The method of claim 3, Electrodeless illumination system, characterized in that made by connecting the heat dissipation surface and the casing of the thermoelectric element with a heat transfer member. The method of claim 6, Electroless illumination system, characterized in that the heat transfer member is a heat pipe. The method of claim 3, An electrodeless illumination system, characterized in that the voltage difference generator is mounted inside the casing. The method of claim 3, An electrodeless illumination system, characterized in that the voltage difference generator is mounted on the outside of the casing. The method of claim 3, An electrodeless illumination system comprising an element mounting member for flattening an attachment surface of a thermoelectric element between an anode portion of a magnetron and a thermoelectric element.