KR100369816B1 - Microwave oven - Google Patents

Abstract

The present invention relates to a microwave oven having a main body casing which forms a cooking chamber and a component chamber, which are isolated from each other, and an outer casing surrounding the main body casing, wherein an uneven pattern is formed on the side wall of the part chamber side of the outer casing. It features. As a result, a microwave oven is provided which effectively prevents resonance noise and at the same time reduces manufacturing costs and improves productivity.

Description

Microwave oven {MICROWAVE OVEN}

The present invention relates to a microwave oven having a main body casing which forms a cooking chamber and a component chamber which are isolated from each other, and an outer casing surrounding the main body casing.

3 is a perspective view of an external casing disassembled state of a conventional microwave oven, and FIG. 4 is a partial cross-sectional view taken along line IV-IV of FIG. 3. As shown in these figures, the conventional microwave oven has an inverted " U " shape arranged to surround the main body casing 101 and the main body casing 101 forming the cooking chamber 107 and the component chamber 105. It has an outer casing 103. The main body casing 101 is composed of a front plate 111, a rear plate 113, and a lower plate 115 coupled to the front, rear, and bottom surfaces of the outer casing 103, respectively, and the front plate 111 and the back plate. Between the 113 is a rectangular cylindrical casing 117 is formed, the inner space is formed by the cooking chamber 107.

In front of the main body casing 101, a door 106 for rotating and opening the front opening of the cooking chamber 107, and an operation panel 104 for operating a microwave oven are provided, and the main body casing in the rear region of the operation panel 104 is provided. The component chamber 105 is formed in 101. The component chamber 105 is provided with a magnetron 123 for outputting microwaves and supplying it to the cooking chamber 107, and a high voltage transformer 121 and a high voltage capacitor 124 for applying a high voltage to the magnetron 123.

However, in the conventional microwave oven, when the high voltage transformer 121 applying a high voltage to the magnetron 123 generates a vibration of a relatively high frequency, the vibration is an outer casing adjacent to the high voltage transformer 121. If the vibration of the high-voltage transformer 121 coincides with the period of the natural frequency of the side plate 110, the side plate 110 of the outer casing 103 is subjected to resonance. Vibration and vibration are caused by. As a result, resonance noise is generated from the outer casing 103 side plate 110, and the lower plate 115 of the lower side of the side plate 110 of the outer casing 103 and the component chamber 105 side of the main body casing 101. There is a problem that the contact noise is repeatedly contacted with each other.

In order to solve this problem, the conventional microwave oven is attached to the damping sheet 120 such as a sponge inside the side plate 110 of the component chamber 105 side of the outer casing 103. The damping sheet 120 absorbs and blocks the resonance generated during the operation of the high voltage transformer 121, thereby preventing resonance noise of the microwave oven.

However, in the conventional microwave oven, since damping sheets 120 such as sponges are separately attached to the side plates 110 of the outer casing 103 in order to prevent resonance noise, fabrication of additional parts is performed. There is a problem that the cost is increased, the productivity is reduced by the addition of the assembly process.

Accordingly, an object of the present invention is to provide a microwave oven which can effectively prevent resonance noise, reduce manufacturing costs, and improve productivity.

1 is a perspective view of a disassembled state of the outer casing of the microwave oven according to the present invention;

FIG. 2 is a partial cross-sectional view taken along line II-II of FIG. 1;

3 is a perspective view of an external casing disassembled state of a conventional microwave oven,

4 is a partial cross-sectional view taken along line IV-IV of FIG.

* Explanation of symbols for the main parts of the drawings

3: outer casing 5: parts chamber

7: cooking chamber 10: side plate

17: cavity casing 20: uneven pattern

21: high voltage transformer

The object of the present invention is a microwave oven having a main body casing which forms a cooking chamber and a component chamber which are mutually isolated from each other, and an outer casing surrounding the main body casing. It is achieved by the microwave oven characterized by the above-mentioned.

Here, the uneven pattern is preferably formed to be adjacent to the high voltage transformer installed in the component chamber.

The uneven pattern may be formed in a triangular shape having a closed section, and the uneven pattern may be formed to protrude outward.

Hereinafter, with reference to the accompanying drawings will be described in detail for the subject innovation.

1 is a perspective view of an external casing disassembled state of the microwave oven according to the present invention, Figure 2 is a partial cross-sectional view along the line II-II of FIG. As shown in these figures, the microwave oven includes a main body casing 1 forming the cooking chamber 7 and a component chamber 5, and an outer casing having an inverted " U " shape arranged to surround the main body casing 1; Has (3). The main body casing (1) consists of a front plate (11), a rear plate (13) and a lower plate (15) coupled to the front, rear, and bottom surfaces of the outer casing (3), respectively. Between the 13 is a rectangular cylindrical casing 17 in which an internal space is formed by the cooking chamber 7 is interposed.

In front of the main body casing 1, a door 6 for rotating and opening the front opening of the cooking chamber 7 and an operation panel 4 for operating the microwave oven are provided, and the main body casing in the rear region of the operation panel 4 is provided. The component chamber 5 is formed in (1). The component chamber 5 is provided with a magnetron 23 for outputting microwaves and supplying it to the cooking chamber 7, a high voltage transformer 21 and a high voltage capacitor 24 for applying a high voltage to the magnetron 23.

On the other hand, an anti-resonance pattern 20 for preventing resonance is formed in the side plate 10 on the component chamber 5 side of the outer casing 3. The uneven pattern 20 is formed to protrude outward in a triangular shape having a closed section from the plate surface of the outer casing 3 adjacent to the high voltage transformer 21 provided in the component chamber 5. The uneven pattern 20 is formed by press working during molding of the outer casing 3.

The uneven pattern 20 serves to increase the rigidity of the side plate 10 of the outer casing 3, so that the outer casing (3) side plate by the resonance transmitted from the high voltage transformer 21 during the microwave operation. 10) to prevent vibration and tremor.

Thus, by forming the outwardly-projected pattern 20 in the side plate 10 of the component chamber 5 side of the outer casing 3, the resonance noise by the high-voltage transformer 21 generated when the microwave oven is operated. It can effectively prevent, and the noise due to the contact of the outer casing 3 and the adjacent member can be effectively prevented.

In addition, by not attaching a separate damping sheet to prevent resonance noise, components are reduced to reduce manufacturing costs and assembly process is reduced to improve productivity.

In the above description and the embodiment, the uneven pattern is described as a triangular shape having a closed section, but of course it can be molded to have a polygonal shape including a rectangular shape.

As described above, according to the present invention, a microwave oven is provided which effectively prevents resonant noise and reduces manufacturing cost and improves productivity.

Claims (4)

In a microwave oven having a main body casing to form a cooking chamber and a component chamber separated from each other, and an outer casing surrounding the main body casing, And a concave-convex pattern is formed on the side wall of the component chamber side of the outer casing. The method of claim 1, The uneven pattern is microwave oven, characterized in that formed to be adjacent to the high-voltage transformer installed in the component chamber. The method of claim 2, The uneven pattern is a microwave oven, characterized in that formed in a triangular shape having a closed section. The method according to any one of claims 1 to 3, The uneven pattern is microwave oven, characterized in that formed to protrude outward.