KR100587312B1 - Magnetron - Google Patents

Abstract

The present invention relates to a magnetron, and more particularly, to a magnetron having improved performance by improving the materials of the acyl and fsil of the magnetron, and thus generating no effective magnetic field due to the acyl and fsil.

To this end, the present invention is to make the material of the acyl and Fsil of the magnetron to a nonmagnetic material having a relative permeability similar to that of air, thereby reducing the loss of the magnetic field by eliminating the invalid magnetic field generated by the acyl and the Fsil of the magnetron. It provides a magnetron that can increase the performance and reduce the cost.

Magnetron, magnetic field, invalid magnetic field, Asil, Fsil, nonmagnetic material

Description

Magnetron

1 is a cross-sectional view showing a schematic configuration of a conventional magnetron.

2 is a cross-sectional view showing a schematic configuration of the magnetron of the present invention.

* Description of Signs of Major Parts of Drawings *

101: York Edition 111: anode

112: magnet 114a: ACIL

114b: fsyl

The present invention relates to a magnetron, and more particularly, to a magnetron having improved materials of ACIL and FSI that shield high frequency leakage.

In general, magnetrons are applied to microwave ovens, plasma lighting equipment, dryers and other high frequency systems. The magnetron is used as a heat source for heating the target by generating a high frequency (micro wave) by the electromagnetic field of the hot electrons emitted to the cathode as the power is applied.

The magnetron is roughly divided into a high frequency generator for generating high frequency energy by an electromagnetic field, an input unit for applying power to the high frequency generator, and an output unit for emitting high frequency energy from the high frequency generator.

1 is a block diagram illustrating a structure of a conventional magnetron. Referring to the magnetron, a yoke upper plate 1a and a yoke lower plate 1b are installed inside an outer case, and a high frequency output unit is provided on an upper portion of the yoke upper plate 1a. A high frequency generator is installed inside the upper and lower yoke plates (hereinafter, referred to as a "yoke plate"), and an input part is provided below the yoke lower plate 1b.

The input unit has a filter box 22 fixed to the lower portion of the yoke lower plate 1b, a capacitor 23 installed in the filter box to supply power, and a choke coil 23a connected to the capacitor to receive current. And an external connection lead 23b extending from the choke coil.

The high frequency generator is provided with a cylindrical anode 11 at the center of the yoke plate 1, an acyl 14a is installed at an upper end of the anode 11, and an F-silk at a lower end of the anode 11. 14b is provided, and the upper magnet 12a and the lower magnet 12b are respectively provided outside the Asil 14a and the Fsil 14b. In addition, on the inner surfaces of the f-sil 14b and the ac-il 14a, a box electrode 13a and a retarder 13b are provided to be symmetrical with respect to the vane 15 up and down, and the f-sil 14b. At the lower end of the ceramic stem 21 is installed to seal the lower end of the F chamber 14b.

The inner surface of the anode 11 is radially provided with vanes 15 to form a working space 15a in the center, and a cathode 16 is installed in the working space 15a, and the cathode A center lead 17a and a side lead 17b are installed at 16 to support the cathode 16, and the center lead 17a and the side lead 17b are electrically connected to an external connection lead 23b. do.

The high frequency output unit includes an antenna feeder 32 and an ceramic 31. The antenna feeder 32 has one end connected to the vane 15 and the other end connected to the antenna cap (not shown). It is installed so as to surround the ceramic 31 is installed between the upper end of the acyl 14a and the antenna cap. Accordingly, the high frequency transmitted through the antenna feeder 32 reaches the target object through the ceramic 31.

In general, a magnetic force is generated between the magnetic body and the magnetic body. The strength of the magnetic force is determined by the magnetic field generated around the magnetic body.

As the magnetron is applied with current to the center lead 17a through the external connection lead 23b, hot electrons are emitted from the cathode 16 connected thereto, and the hot electrons are emitted from the inner surface of each vane 15 and the cathode. It is located in the working space (15a) formed between (16). In addition, the magnetic energy generated from the upper and lower magnets 12a and 12b is concentrated into the working space 15a through the upper and lower magnetic poles 13a and 13b.

The focused magnetic energy delivers kinetic energy to the hot electrons, thereby generating high frequency.

Here, the acyl 14a and the fsil 14b maintain a vacuum inside the anode 11 and prevent the high frequency generated from the high frequency generator from leaking to the outside. Installed to shield the output.

The acyl 14a and fsil 14b are mainly made of iron-based materials having low cost and high strength, and the iron-based materials are easily magnetized as ferromagnetic materials having a relative permeability of 4000 or more. Since the acyl 14a and the fsil 14b made of the iron-based material are installed in the vicinity of the magnets 12a and 12b, which are strong sources of magnetic force, they are easily magnetized by the magnetic forces of the magnets 12a and 12b. .

However, when the AC 14a and the F seal 14b are formed of a material having a high relative permeability as described above, the Asil of ferromagnetic material easily magnetized by the magnets 12a and 12b and the magnets 12a and 12b. Magnetic loss, i.e., an invalid magnetic field is generated between the 14a and the f chamber 14b, and this invalid magnetic field is represented by a loss of the total magnetic field acting on the working space, thereby degrading the performance of the entire magnetron. .

In order to solve the above problems, an object of the present invention is to improve the material of the Asil and Fsil of the magnetron, to provide a magnetron with improved performance because no reactive magnetic field is generated due to the Asil and Fsil.

In order to achieve the above object, the present invention provides a high frequency generator for generating high frequency energy by an electromagnetic field, an input unit for applying power to the high frequency generator, and a high frequency output for emitting high frequency energy from the high frequency generator. A magnet provided between a high frequency generating portion and an input portion to prevent high frequency leakage, and an acyl provided between the high frequency generating portion and the high frequency output portion to prevent high frequency leakage. At least one of the real is made of a non-magnetic material to provide a magnetron, characterized in that to prevent the generation of an invalid magnetic field.

In addition, at least one of the Asil and Fsil is characterized in that the relative permeability is made of a material in the range of 1 ± 0.1.

Hereinafter, with reference to the accompanying drawings and the preferred embodiment of the magnetron of the present invention will be described in detail.

In addition, in the following description, the same parts as those of the prior art main components of the magnetron according to the present invention will be referred to the prior art according to FIG.

2 is a view showing a magnetron of the present invention.

The magnetron according to the present invention is roughly divided into a high frequency generator for generating high frequency energy by an electromagnetic field, an input unit for applying power to the high frequency generator, and an output unit for emitting high frequency energy from the high frequency generator.

The input unit is installed below the high frequency generator, and forms a filter box 122 forming an appearance, a capacitor 123 installed in the filter box 122 to supply power, a choke coil 123a and an external connection lead ( 123b).

The output unit includes an antenna feeder 132 and an ceramic 131.

In addition, the high-frequency generating unit between the yoke plate 101 forming an appearance, the anode 111 formed in a cylindrical shape at the center, the vanes 115 formed inside the anode 111, and the vanes 115. The cathode 116 is formed in the working space (115a), and the magnet 112 is formed on the upper and lower portions of the anode 115, respectively, in the high frequency generator in a portion connected to the input and output An ac-il 114a and a f-sil 114b are provided to shield the generated high frequency so as not to leak to the outside.

Table 1 is a result of comparing the strength of the magnetic field of the magnetron from which the acyl 114a and the fsil 114b are removed from the conventional magnetron and the conventional magnetron.

Magnetron model Magnetic Field Density (G) In case of Asil and Fsil (ferromagnetic material with high permeability) Without Asil and Fsil (permeability equal to air) Sample 1 1715 1915 Sample 2 1881 2029 Sample 3 1816 2058

In Table 1, the numerical value of the magnetic field of the sample is proportional to the operating voltage of the magnetron. That is, even when the magnets 112 having the same capacity are used, the larger the magnetic field is, the higher the performance of the magnetron of higher voltage can be exhibited.

In addition, as shown in Table 1, when the acyl 114a and fsil 114b are removed, that is, when the permeability is equal to air, the magnetic field value of the magnetron is about 200 G higher than that of the conventional magnetron. Can be.

Therefore, if a material having the relative permeability equal to or similar to air is used for the materials of the acyl 114a and the fsil 114b, the effect that occurs when the acyl 114a and the fsil 114b is removed is as follows. It is obvious that similar effects are expected.

Therefore, it is preferable that the acyl 114a and the fsil 114b of the magnetron of the present invention are made of a nonmagnetic material.

In addition, the relative permeability of the material forming the acyl 114a and fsil 114b is more preferably 1 ± 0.1.

Such materials are typically copper, brass, silver, gold, and non-magnetic stainless steel (Sus 304). In addition, other materials similar in relative permeability may be used.

Other components and operation are the same as the configuration and operation of the prior art described above, the detailed description thereof will be omitted.

As described above, according to the magnetron of the present invention, there is an effect that can increase the performance of the magnetron by reducing the loss of the magnetic field without the invalid magnetic field generated by the acyl and Fsil of the magnetron.

In addition, even when using a small size and low-cost magnet can generate a sufficient magnetic field has the effect of reducing the cost.

Claims (7)

A high frequency generator for generating high frequency energy by an electromagnetic field, an input unit for applying power to the high frequency generator, a high frequency output unit for emitting high frequency energy from the high frequency generator, and between the high frequency generator and the input unit In the magnetron which is provided in the F chamber to prevent the leakage of high frequency, and the acron provided between the high frequency generator and the high frequency output unit to prevent the leakage of high frequency, At least one of the Asil and the F-sil is made of a nonmagnetic material of the magnetron, characterized in that to prevent the generation of an invalid magnetic field. The magnetron of claim 1, wherein at least one of the acyl and the fsil is made of a material having a relative permeability of 1 ± 0.1. The magnetron according to claim 2, wherein at least one of the acyl and fsil is made of copper. The magnetron of claim 2, wherein at least one of the acyl and fsil is made of brass. The magnetron of claim 2, wherein at least one of the acyl and fsil is made of silver. The magnetron according to claim 2, wherein at least one of the acyl and fsil is made of gold. The magnetron of claim 2, wherein at least one of the acyl and fsil materials is made of non-magnetic stainless steel (Sus 304).

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