KR19990056507A - Microwave Oscillation Tube for Microwave Oven - Google Patents

Abstract

The present invention relates to a microwave oven tube for microwave oven, comprising: a lower case surrounding a lower portion of a heating means, a cathode, a first grid, a second grid, and an anode; An upper case surrounding the upper part of the anode and the cooling fins, the upper case extending inwardly so that the upper bracket is positioned on the upper part of the anode; An antenna, one end of which is located in the output cavity and the other end of which protrudes outside the bracket of the upper case to propagate microwaves generated in the output cavity to the cooking chamber; An anode cap coupled to the top of the anode and having a central protrusion inserted into the gasket attached to the inside of the bracket; Gasket ring consisting of a flat plate and a protrusion, interposed between the anode cap and the gasket, the flat plate is located between the top of the anode and the bracket and supported by them, the top of the protrusion is bent outward to cover a portion of the gasket Characterized in that it comprises a.

According to the present invention, the space between the anode upper end and the bracket of the upper case is eliminated to achieve miniaturization of the product, and the gasket is more firmly supported through the gasket ring.

Description

Microwave Oscillation Tube for Microwave Oven

The present invention relates to an ultra-high frequency oscillation tube for a microwave oven, and more particularly, the space between the anode top and the bracket of the upper case is removed to achieve miniaturization of the product, and the microwave oven is more firmly supported by the gasket ring. It is about a high frequency oscillator tube.

The applicant's Korean Patent Application No. 97-36327 proposes a microwave oven tube for microwave oven which is simple in structure and can reduce the risk due to high voltage and achieve light weight. In this ultra-high frequency oscillation tube, as shown in FIG. 1, the cathode 132 as a ring-shaped disk-shaped electron radiator is disposed on the upper surface of the heater 120 by indirect heating, and the heat generated by the heater 120 is generated. When the cathode 132 is heated to about 600-1200 ° C., the cathode 132 emits hot electrons, and the released hot electrons are biased to the first grid 134 arranged at predetermined intervals on the cathode 132. As it is applied, it is controlled and focused in the input cavity 130.

The electrons focused on the input cavity 130 in the space surrounded by the cathode 132, the first grid 134, and the blocking capacitor 136 are densely modulated by the automatic shielding function of the bias power supply of the first grid 134 to be formed. When an operating voltage is applied between the input and output cavities 130 and 140 that are insulated from each other through the first grid 134, a potential difference is generated therebetween to accelerate electrons passing through the first grid 134. As it passes through the second grid 142, surface current is induced in the output cavity 140. As a result, microwaves are formed in the output cavity 140, and the formed microwaves penetrate through the center of the anode 146 and are radiated through the antenna 150 formed in the output cavity 140. For this purpose, the coupling end 152 of the antenna 150 is located in the output cavity 140.

Meanwhile, a feed rod 160 for feeding back part of the microwaves formed in the output cavity 140 to the input cavity 140 is installed at the center between the input / output cavities 130 and 140 to amplify and resonate the power of the microwave. .

However, in the conventional microwave microwave tube, there is a space between the bracket 102 and the upper end of the anode 146 to increase the size of the product, and weak structure for supporting the gasket 149. There is a problem.

Accordingly, the present invention has been devised according to this, the space between the anode top and the bracket of the upper case is removed to achieve miniaturization of the product, and to provide a microwave microwave tube for supporting the gasket more firmly through the gasket ring It is.

As a means for achieving the above object, the microwave oven for microwave oven of the present invention, the heating means; A cathode disposed in the heat generating unit to emit electrons; A first grid disposed on the cathode to form an input cavity with the cathode and the blocking capacitor, the first grid focusing electrons emitted from the cathode according to the formed bias voltage; A second grid disposed on the first grid and through which electrons passing through the first grid pass; An anode disposed on the second grid to form an output cavity with the second grid; A lower case surrounding the lower portion of the heat generating means, the cathode, the first grid, the second grid, and the anode to maintain the interior thereof in a vacuum; An upper case surrounding the upper portion of the anode and the cooling fins, the upper case extending inwardly so that the upper bracket is overlapped on the upper portion of the anode; An antenna whose one end is located in the output cavity and whose other end protrudes outward through the bracket of the upper case to propagate microwaves generated in the output cavity to the cooking chamber; An anode cap coupled to the top of the anode and having a central protrusion inserted into a gasket attached to the inside of the bracket; A flat plate and a protrusion are interposed between the anode cap and the gasket, and the flat plate is positioned between and supported by the upper end of the anode and the bracket, and the upper end of the protrusion is bent outward to the gasket. It characterized in that it comprises a gasket ring covering a portion of the.

According to the present invention, the space between the anode upper end and the bracket of the upper case is eliminated to achieve miniaturization of the product, and the gasket is more firmly supported through the gasket ring.

1 is a cross-sectional view showing the overall structure of a conventional microwave oven for microwave oven,

Figure 2 is a cross-sectional view showing the main part of the microwave oven for microwave oven according to a preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

120: heater 130: input cavity

134: first grid 140: output cavity

142: second grid 146: anode

150: antenna 160: feedback rod

180: heater holder 182, 184: first and second grid holder

501: upper case 502: bracket

503: anode cap 504: gasket

505: Gasket Ring

Hereinafter, with reference to the accompanying drawings will be described in detail a microwave microwave oscillation tube for a preferred embodiment of the present invention. For convenience of explanation, the same reference numerals are given to the same configuration as in the prior art.

3 shows an improved cathode structure, which is a characteristic element of the present invention, with reference to FIG. 1 to illustrate the microwave microwave tube of the present invention.

The microwave microwave tube of the present invention includes a heater 120 as a heat generating means, a cathode 232 disposed on the heater 120 to emit electrons, and a cathode 232 and a blocking capacitor disposed on the cathode 232. The first cavity 134 is formed together with the first 136 to focus the electrons emitted from the cathode 232 according to the formed bias voltage, and is disposed on the first grid 134. A second grid 142 through which electrons passing through the first grid 134 pass, and an anode 146 disposed on the second grid 142 to form an output cavity 140 together with the second grid 142. It includes. Such structures and operations are described in detail in the currently pending Korean Patent Application No. 97-36327, which is incorporated herein by reference.

Microwave oscillation tube for a microwave oven of the present invention, as shown in Figure 2, the heater 120, the cathode 132, the first grid 134, the second grid 142 to maintain the inside of the vacuum. And the lower case 105 surrounding the lower portion of the anode 146, the upper portion of the anode 146 and the cooling fins 148, and the upper bracket 102 overlaps the upper portion of the anode 146. An upper case 501 extending inwardly to be positioned.

One end of the antenna 150 is located in the output cavity 140, and the other end of the antenna 150 protrudes outward through the bracket 502 of the upper case 501 so that microwaves generated in the output cavity 140 may be microwaved. To propagate.

The anode cap 502 has a central protrusion 503a coupled to the top of the anode 146 and inserted into a gasket 504 attached to the inside of the bracket 502. An antenna ceramic 154 is brazed and fixed to an upper end of the central protrusion 503a, and an antenna cap 156 is brazed and fixed to the antenna ceramic 154.

On the other hand, the gasket ring 505 is composed of a flat plate portion 505a and a protrusion 505b, and is interposed between the anode cap 503 and the gasket 504. At this time, the plate portion of the gasket ring 505 is located between and supported by the upper end of the anode 146 and the bracket 502, and the upper end of the protrusion 505b of the gasket ring 505 is bent outwardly. Part of the gasket 504 is covered.

As described above, in the microwave microwave oscillation tube of the present invention, the space between the anode upper end and the bracket of the upper case is removed to achieve miniaturization of the product, and the gasket is more firmly supported through the gasket ring.

Claims (2)

Heating means; A cathode disposed in the heat generating unit to emit electrons; A first grid disposed on the cathode to form an input cavity with the cathode and the blocking capacitor, the first grid focusing electrons emitted from the cathode according to the formed bias voltage; A second grid disposed on the first grid and through which electrons passing through the first grid pass; An anode disposed on the second grid to form an output cavity with the second grid; A lower case surrounding the lower portion of the heat generating means, the cathode, the first grid, the second grid, and the anode to maintain the interior thereof in a vacuum; An upper case surrounding the upper portion of the anode and the cooling fins, the upper case extending inwardly so that the upper bracket is overlapped on the upper portion of the anode; An antenna whose one end is located in the output cavity and whose other end protrudes outward through the bracket of the upper case to propagate microwaves generated in the output cavity to the cooking chamber; An anode cap coupled to the top of the anode and having a central protrusion inserted into a gasket attached to the inside of the bracket; A flat plate and a protrusion are interposed between the anode cap and the gasket, and the flat plate is positioned between and supported by the upper end of the anode and the bracket, and the upper end of the protrusion is bent outward to the gasket. Microwave oscillation tube for a microwave, characterized in that it comprises a gasket ring covering a portion of the. The microwave oscillation tube of claim 1, wherein the antenna ceramic is brazed and fixed on the center protrusion of the anode cap, and the antenna cap is brazed and fixed on the antenna ceramic.