KR970007289B1 - Magnetron - Google Patents

Abstract

A magnetron for electromagnetic range decreases the size of yoke, increases the size of radiation plate and the exposure size of radiation plate and advances the curtailment of material cost and cooling efficiency. A plurality of radiation plates(20) is attached to circumference portion of a magnetron body(1). A permanent magnet(2) is combined with the upper and lower part of the body(1). A filter box(6) is fixed to the lower part of the floor. A yoke(30) is fixed to the lower part of the body. A yoke cover(4) is combined with the upper part of the yoke(30). The size of yoke(30) is reduced for exposuring the left and right part of the radiation plate(20) by the certain size. Thereby, the magnetron can improve the performance of magnetron and has trust and stability.

Description

Microwave Magnetron

1 is a front view of a magnetron for a conventional microwave oven.

2 is a side view of a magnetron for a conventional microwave oven.

3 is a plan view of a heat sink of a magnetron for a conventional microwave oven.

Figure 4 is a side view of the heat sink of the conventional microwave magnetron.

5 is a front view of a magnetron for a microwave oven according to the present invention.

6 is a side view of a magnetron for a microwave oven according to the present invention.

7 is a plan view of a heat sink of a magnetron for a microwave oven according to the present invention.

8 is a side view of the heat sink of the magnetron for microwave oven according to the present invention.

* Explanation of symbols for main parts of the drawings

1: main body 2: permanent magnet

4: yoke top 5: antenna

6: filter box 20: heat sink

23; 23a-23d: Small 30: York

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetron structure for a microwave oven, and more particularly, to a magnetron of a microwave oven, which reduces a yoke size, increases an area and an exposed area of a heat sink, and improves material cost and cooling efficiency.

In general, microwave ovens are equipped with a magnetron for high frequency oscillation, and a plurality of heat sinks (heat radiating fins) are welded outside the main body of the magnetron to cool the heat generated during the oscillation of the magnetron, and the left and right sides of the case are opened. Cooling by forcibly blowing wind by installing a cooling fan on one side.

1 is a front view of a magnetron for a conventional microwave oven, and FIG. 2 is a side view, and a magnetron anode assembly (hereinafter referred to as a main body) having oscillation means such as filaments, vanes, and magnetic poles as shown therein (1) A plurality of heat sinks 10 (e.g., six) are fixedly attached to the outer periphery of the head), and permanent magnets 2 are coupled to the upper and lower parts of the main body 1, and the filter box 6 is disposed below the bottom plate. Is fixed integrally and the yoke 3 having the left and right sides and the upper surface opened is fixed to the lower portion of the main body 1 at the bottom of the lower permanent magnet, and drawn out of the main body 1 on the upper surface of the yoke 3. The yoke lid 4 is fixedly coupled to the antenna 5.

Here, the filter box 6 installed below the main body 1 is a structure for shielding the high frequency leakage of the power lead for supplying power in the main body 1, the main body 1 through the high frequency choke The lead is drawn out, and the power lead is connected to the external power supply terminal through the choke coil and through-type capacitor in the filter box.

In addition, the yoke (3) forms a magnetic circuit of the permanent magnet to form a magnetic circuit, the left and right sides are opened so that the wind of the cooling fan can pass between the cooling fan 10, the heat sink 10 The front and rear ends of the are in close contact with the wall surface of the yoke 3 to serve as an outer case.

The heat sink 10 has a coupling hole in which the main body 1 is fitted in the center of the rectangular plate as shown in FIG. 3 of the heat sink of the conventional magnetron for microwave ovens and the side view of the heat sink of the conventional magnetron for microwave ovens. (11) is formed, heat is transferred from the main body (1) around the coupling hole (11), and a coupling edge (12) for improving the bondability is bent, and the front side of the heat sink (10). The rear end portion is formed into four small pieces 13, and each of the small pieces 13 is cut so that a jig for fixing the magnetron is fitted to the outer corners of the small pieces 13a and 13d on both sides. The inner two small pieces 13b and 13c are symmetrically bent up and down predetermined angles, respectively, and end portions of the small pieces 13 are bent in a predetermined length so as to be in close contact with the wall surface of the yoke 3 to achieve heat transfer. . At this time, the bending length is bent in such a way that the upper and lower heat sinks do not interfere with each other. In addition, the block portion 14 is formed long in the left and right sides inside each of the small pieces 13 to serve as a guide to pass the wind well.

However, according to the heat sink 10 and the yoke 3 structure of the conventional microwave magnetron for microwaves, when the left and right sides of the yoke 3 are opened and forcedly blown by a cooling fan from one side thereof, the wind causes a plurality of heat sinks. Cooling while passing between the (10), but the front and rear side is blocked by the yoke (3), the cooling efficiency is lowered, the heat sink 10 itself also has a cut portion to join the jig, etc. There is this.

In addition, the yoke 3 serves as a case for maintaining the shape of the magnetron and acts as a magnet of the upper and lower permanent magnets 2, thereby serving as a part of a magnetic circuit required for oscillation of the magnetron, and dissipating all of the heat sink 10. The yoke structure of the conventional magnetron having a size to cover has a wasteful factor because it is a size that is enough to perform the function of the desired magnetic role, reducing the cooling efficiency.

The present invention is to provide a magnetron for microwave oven to improve the disadvantages to increase the heat dissipation area of the heat sink, reduce the size of the yoke to improve the cooling efficiency.

The object of the present invention is a microwave magnetron having a structure in which a plurality of heat sinks are attached to the periphery of the magnetron body, and the left and right sides of the yoke are open. By cutting both sides of the yoke as much as possible to reduce the width, it is achieved by extending to the outside to extend without protruding jig engaging portion of the exposed portion of the heat sink, it is achieved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a front view of a magnetron for a microwave oven according to the present invention, and FIG. 6 is a side view, and as shown therein, a plurality of magnetron main bodies 1 having oscillation means such as filaments, vanes, and magnetic poles, as shown in FIG. Two heat sinks 20 are fixedly attached, permanent magnets 2 are installed at upper and lower portions of the main body 1, and the filter box 6 is integrally fixed to the lower part of the bottom plate, and the left and right sides and the yoke are opened. 30 is fixed to the lower part of the main body 1 at the bottom of the lower permanent magnet, and the yoke lid 4 by guiding the antenna 5 drawn from the main body 1 on the upper surface of the yoke 30. This combination is fixed.

Here, the yoke 30 is configured to form a magnetic circuit of the permanent magnet, the left and right sides are opened so that the wind of the cooling fan can pass between the heat sink 20, the heat sink 20 The left and right side portions of the heat sink 20 are formed to be reduced in size, and an end portion of the middle portion of the heat sink 20 is in close contact with the wall surface of the yoke 30 to serve as heat dissipation and an outer case.

The heat sink 20 is a plan view of a heat sink of the magnetron for a microwave oven according to FIG. 7 and a heat sink side view of the magnetron for a microwave oven according to the present invention. The coupling hole 21 into which is inserted is formed, heat is transferred from the main body 1 around the coupling hole 21, and the coupling edge 22 is formed to bend to improve the bonding property, and the heat sink The front side and the rear end of the 20 are each formed into four small pieces 23, and the small pieces 23a and 23d on both sides of the small pieces 23 are spread out to both sides of the yoke 30. The inner two small pieces 23b and 23c are each symmetrically bent up and down in symmetry, and the ends of the two inner small pieces 23b and 23c are brought into close contact with the wall surface of the yoke 30 so that heat transfer is performed. The predetermined length is formed to be made. At this time, the bending length is bent in such a way that the upper and lower heat sinks do not interfere with each other. In addition, the convex portion 24 is formed to be formed to the left and right sides long inside each of the small pieces 23 to serve as a guide to pass the wind well.

According to the magnetron for microwave oven according to the present invention configured as described above, the width of the yoke 30 is reduced to about 1/2 compared to the conventional one as shown in FIG. At this time, the yoke 30 is an important part constituting the magnetic circuit of the magnetron, and also serves as a case of the upper and lower permanent magnet (2). Therefore, it is composed of only the minimum width that can act as a magnetic contact with the upper and lower magnets.

Accordingly, the material for manufacturing the yoke 30 can be reduced, and the cooling efficiency can be improved by increasing the exposed area of the heat sink 20.

On the other hand, the structure of the heat sink 20 is configured as shown in Figure 7 to increase the heat dissipation area. Conventionally, all four small pieces are hidden inside the yoke, but according to the present invention, since the width of the yoke 30 is reduced, the two outer small pieces 23a and 23d reduce the width of the yoke 30. Therefore, the outer two small pieces 23a and 23d are exposed to both sides of the yoke 30, so that the lengths of the small pieces 23a and 23d are unfolded without clipping the portion cut out for jig insertion.

In the related art, the jig can be inserted into the yoke when the jig is used to fix the magnetron, but the magnetron may be fixed by supporting the jig in close contact with the outside. Therefore, in the present invention, when the jig is installed to be in close contact with the outside, the jig insertion groove is not necessary, so that the heat sink 30 may not be cut out.

And, since the magnetron is installed at regular intervals without being installed in close contact with the side wall of the cavity, the length of the unfolded small pieces 23a, 23d can be extended to a predetermined length, which is used when forming the heat sink 30. Since only the size needs to be adjusted, a separate process is not required, and only the same process as in the related art can be made into a desired shape.

As described in detail above, the magnetron according to the present invention is configured to reduce the width of the yoke, thereby reducing the material cost, and increasing the area of the heat sink and increasing the exposed area, thereby improving the cooling efficiency of the magnetron. In addition, the cooling efficiency is improved, and as a result, the performance of the magnetron is improved and reliability and safety are secured.

Claims (3)

A plurality of heat sinks 20 are fixedly attached to the outer periphery of the magnetron body 1, the permanent magnets 2 are coupled to the upper and lower portions of the body 1, and the filter box 6 is integrated at the bottom of the bottom plate. The yoke 30 is fixed to the lower side and the upper and the open side is fixed to the lower portion of the main body 1 from the bottom of the lower permanent magnet, the antenna drawn from the main body 1 on the upper surface of the yoke 30 ( 5) In the microwave magnetron in which the yoke lid 4 is fixedly coupled to each other, the microwave oven is characterized in that the yoke 30 is reduced in width so as to expose the left and right sides of the heat sink 20 by a predetermined width. Dragon magnetron. The yoke 30 according to claim 1, wherein the heat sink 20 extends a predetermined length by forming portions exposed to both sides of the yoke 30 into small pieces 23a and 23d, and extends the end thereof. A magnetron for a microwave oven, characterized in that the structure is formed to protrude to both sides of the. The magnetron for microwave oven according to claim 2, wherein the heat dissipation plate (20) is configured without cutting out the jig insertion portion for fixing the magnetron.