KR890003954Y1 - Prevention apparatus of microwave leakage - Google Patents

Abstract

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Description

Radio wave shield of high frequency heater

1 is a perspective view of a high frequency heater according to the present invention.

2 is a structural diagram of an electromagnetic shield formed on a door of a conventional high frequency heater.

Figure 3 is a cutaway perspective view of the electromagnetic shield formed on the door of the high frequency heater according to the present invention.

4 is a side view of the damping groove of the door according to the present invention

5 is a front view of a shield group of damping grooves according to the present invention.

* Explanation of symbols for main parts of the drawings

1: door 2: high frequency heater

5: heating chamber 27: sealing plate

28: frame 20: shield group

21,21 ': protrusion 22: reducing groove

The present invention relates to a shielding device for electromagnetic waves flowing out into a gap of an assembly structure of a high frequency heater, and more particularly, to an electromagnetic shielding device suitable for preventing the leakage of synthesized electromagnetic waves.

The high frequency heater has a structure in which the object to be heated is placed in a heating space and can be freely taken out so that a space is formed between natural assemblies.

Since the high frequency discharged from the high frequency oscillator flows out through this space, the high frequency emitted has a great effect on the human body.

Therefore, in the high frequency heater, the upper limit of the discharge allowance of high frequency was set as the standard, and the radio wave shield was installed around the door with the largest assembly space to meet the standard.

When the apparatus for shielding the radio wave of the high frequency heater is examined, the metal contact and the radio wave absorber, the radio wave shielding frequency, the tooth circuit or the pickling circuit, and the check method are used. When the shielding structure of the heavy check method is examined on the second degree, a damping groove 12 is formed around the inside of the door 1 to attenuate the microwave traveling in the Z direction and is sealed to attenuate the microwave traveling in the X and Y directions. The stage 7 is fixed to the frame 8 of the door 1 by the screw 10, and the attenuating groove 12 receives the radio wave absorber 13 which finally prevents the micro-leakage which cannot be prevented even by contact between metals and finally leaks. ) It has a triple check structure formed on one side.

However, the above structure is not efficient to obtain a sufficient shielding effect of the radio waves because it does not shield the radio waves traveling in the synthesis direction of the electromagnetic waves, that is, the synthesized radio waves in the X, Y and X and Z directions. The present invention devised to solve this problem is to bend the surface of the damping groove formed by bending the frame of the door at uniform intervals to form a plurality of protruding pieces and to address one side of the sealing plate covering the damping groove. A plurality of protrusions are formed by cutting the positions corresponding to the protrusions at even intervals, and a shield group is formed in the damping groove with these protrusions to shield the synthesized microwave in the X, Y, X, and Z directions. In this case, the attenuation groove itself is used to shield the radio waves in each direction and to extend the service life by not using a radio wave absorber.

This will be described in detail with reference to the accompanying drawings.

The circumference of the frame 28 of the door 1 is bent to form the damping groove 22, and the bottom surface of the damping groove 22 is cut at uniform intervals and then bent to form several protruding pieces 21. .

Then, the bent portion of the sealing plate 27 which is in contact with the frame 28 is propagated and cut at uniform intervals to form another protrusion 21 'at the same position as the protrusion 21 of the damping groove.

And the cover 29 is covered without using a radio wave absorber on the damping groove 22.

4 is a side view of the damping groove according to the present invention.

In the present invention made of the above configuration, the protruding pieces 21 and 21 'are vertical at the intermediate position of the damping groove 22, and have a horizontal row type up and down to form a shielding group 20.

In this case, the clearance gap 2 is provided between the protrusion pieces 21 and the protrusion pieces 21 ', and the heights of the protrusion pieces 21 and 21' are increased. To be.

5 is a front view of the shield group according to the present invention.

The spacing of the protrusions of the shielding group 20 arranged in a row while facing up and down adds the two protrusions and the space therebetween. Formed.

According to the present invention having such a configuration, in the heating chamber 5, the radio wave in the Z direction, which is to be leaked to the outside by the spaces of the cabinet, is turned in the damping groove 22 formed in the outer circumference of the door 1. , The radio wave propagating in the X and Y directions is shielded by the sealing plate (27).

Thus, radio waves propagating in each direction are shielded, but are reflected in the synthetic component (x, z) (x, y) directions of x, z, x, and y while reflecting.

However, the propagation traveling in the direction of the composite component may be Take the height of The shielding group 20 is shielded from the shielding group 20 having two protrusion pieces or two space grooves between the widths.

More specifically, the protrusions are integrally formed on the sealing plate 27 and the door frame 28 to protrude in various directions due to load fluctuations or changes in the electric force distribution pattern. It shields the components of and draws radio waves having only the Z component into the attenuation grooves 22 to exhibit excellent shielding performance.

As described above, the present invention forms a shielding group by forming an integral projecting piece in the damping groove with the size and width of the uniformly spaced, so that the door itself without the radio absorber is synthesized not only in the X, Y, and Z directions, but also as an inferior reflection. It also reliably shields radio waves traveling in the X, Z, X, and Y directions, achieves a variable effect of the shielding range, improves the safety of functions according to the variable effect, and improves the quality, even if the assembly dimensions are inaccurate. It is a radio wave shielding device of high frequency heater which can reduce the cost and increase the production efficiency by the simple structure of assembly because the function of the function is supplemented and the expensive and limited use period is not used.

Claims (2)

In the door 1 which opens and closes the heating chamber 5 of the high frequency heater 2 freely, the surface of the damping groove 22 formed by bending the frame 18 of the door is bent at regular intervals and several projections are made. The pieces 21 are formed, and one side of the sealing plate 17 covering the damping grooves 22 is extended to cut the position corresponding to the above-described protruding pieces 21 at uniform intervals, thereby providing another several pieces of the protruding pieces 21. '), And a shielding group 20 is formed in the damping groove 22 with these protruding pieces 21 and 21' to shield the synthesized microwave in the X, Y, X, and Z directions. A radio wave shielding device of a high frequency heater, characterized in that. The height of the protruding pieces 21 and 21 'above and below the damping groove 2 is increased. Two projections Radio wave shielding device of the high frequency heater formed so that.