KR19980061214U - Ground wire coupling structure of microwave oven - Google Patents

Abstract

The present invention relates to a microwave oven, the purpose of which relates to a ground wire coupling structure of the microwave oven to form a stable external structure by installing a ground wire on one side of the bracket of the magnetron.

The ground wire coupling structure of the microwave oven according to the present invention includes a case 100 in which a cooking chamber 160 and an electrical equipment compartment 130 are partitioned therein, and a case 100 coupled to an inner side of the case 100. The ground wire 230 for guiding the current flowing into the outside to the outside is provided.

Description

Ground wire coupling structure of microwave oven

The present invention relates to a microwave oven, and in particular, to a ground wire coupling structure of the microwave oven to provide a stable external structure by coupling the ground wire to one side of the bracket of the magnetron.

In general, a microwave oven is a cooker applying the principle that food in a metal case generates heat by its own molecular motion by using an electromagnetic wave of approximately 2,450 MHz. In these microwave ovens, radio waves of about 2,450 MHz are oscillated in the magnetron and induced into the case, and the molecules constituting the food are charged with + and-by the induced high frequency. At this time, one side of the molecule is charged with-on the + side of the electric field due to radio waves, and the other side of the molecule is charged with + on the-side of the electric field. However, since the polarity of the electric field changes 2.45 billion times a second due to radio frequency propagation, the food molecules are severely collided with each other, causing frictional heat to heat the food.

1 is a partial cutaway perspective view showing the electrical equipment room by cutting the side of a typical microwave oven. As shown in the drawing, the interior of the case 10 is a cooking compartment 20 in which food is accommodated and cooked, and an electrical equipment compartment 30 in which parts for cooking food are accommodated by irradiating high frequency to the food stored in the cooking compartment 20. ) Is provided. In the electrical equipment compartment 30, a magnetron 31 that radiates high frequency to the cooking chamber 20 is coupled to and installed on a bracket 32 provided above the electrical equipment compartment 30, and a high pressure for applying a high voltage to the magnetron 31 is provided. A transformer 33, a high voltage capacitor 34, and the like are provided below. A cooling fan 35 is installed at the rear of the electronic component room 30 to cool the heat generated when the electrical components are operated. The support member for supporting the motor of the cooling fan 35 is a circuit board 37 provided with a choke coil for removing noise components included in the power supply frequency and a fuse for blocking an overvoltage on the cooling fan 35. It is fixed to the upper side of the 35).

On the other hand, in the upper rear side of the electrical equipment compartment 30, a wire fixing hole 13 into which the power cord 40 is inserted and fixed is provided, and external power is supplied to the components of the electrical equipment compartment 30 through the circuit board 37. The coupler 41 of the power cord 40 to be supplied to is inserted and fixed. The power cord 40 is provided with a power line 42 provided with a + line and a-line therein, and a ground line 43 for guiding an abnormal current generated due to overcurrent or overvoltage generated inside the microwave oven to the outside. The power line 42 is coupled to the circuit board 37 provided with the choke coil and the fuse, and the ground line 43 is fastened as a bolt 45 of the rear plate 12 provided at the rear of the case 10.

In detail, the rear plate 12 is a thin plate of a metal material forming the rear wall surface of the case 10, and the upper end thereof is bent inward, and is coupled with the upper plate 11 to the upper side of the bent surface. The upper plate 11 is supported. This bent surface is provided with a screw hole (not shown) to which the bolt 45 can be coupled to a portion near the wire fixing hole 13. In addition, the ground wire 43 branched from the power cord 40 is provided with a circular ground hole 44 at its end to be coupled as a bolt 45 to a screw hole (not shown).

Such microwave ovens induce damage to the microwave oven and damage to the user by inducing the electric current to the outside through the ground wire 43 when the insulation of electrical components is destroyed due to overcurrent, overvoltage, lightning, etc. To prevent.

However, by providing a screw hole in the bent surface of the thin metal sheet bending, the rear plate is twisted or the gap between the upper plate and the top plate to damage the aesthetics of the microwave oven, the heat inside is discharged between the microwave oven There was a problem of damaging the goods. In addition, the cooling fan coupled to the backplane is out of the normal position due to the twisting of the backplane has a problem that the cooling efficiency is lowered.

Therefore, the present invention is to solve the above problems, an object of the present invention is to provide a grounding wire coupling structure of the microwave oven to form a stable external structure by providing a grounding wire inside the microwave oven is installed on one side of the bracket to which the magnetron is coupled.

1 is a partial cutaway perspective view showing the electrical equipment room of a typical microwave oven.

Figure 2 is a partial cutaway perspective view showing the electrical equipment room of the microwave oven according to the present invention.

FIG. 3 is an enlarged perspective view showing the electrical equipment room in FIG. 2.

Explanation of symbols on the main parts of the drawings

100: Case 130: Electronic equipment room

131: magnetron 132: bracket

200: power cord 210: coupling hole

220: power line 230: ground line

240: Bolt 250: Screw thread

231: Earth 232: Hall

Microwave ground wire coupling structure of the present invention for achieving the above object is a case in which the cooking chamber and the electrical equipment compartment is partitioned therein, a ground wire coupled to the inner side of the case and conductive to guide the current flowing into the case to the outside It is characterized by being provided.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

As shown in FIG. 2, the microwave oven according to an embodiment of the present invention includes a cooking chamber for storing food in the case 100 in which the inner case 120 and the outer case 110 are combined. 160 and an electrical equipment room 130 on which various electric parts are mounted.

The inner case 120 is provided with a front plate (not shown), a rear plate 101, and a lower plate 103, and a cooking chamber 160 is formed on one side of the inner case 120. The front plate (not shown) is opened to form the entrance of the cooking chamber 160. The front plate (not shown) includes an extension portion (not shown) that is bent to extend by a predetermined width from the top and left.

In addition, the back plate 101 facing the front plate (not shown) also includes an extension portion 102 which is integrally extended and bent from the upper side and the left and right by a predetermined width.

The outer case 110 extends to the left and right sides of the upper side provided on the upper side of the inner case 120 and is provided as a left and right side of the outer case, the outer edges of which are the front plate (not shown) and the rear of the inner case 120. It is combined with the edge of the extension 102 of the plate 101 to form the body of the microwave oven. At this time, the front and rear length of each plate of the outer case 110 is equal to the front and rear length of each plate of the inner case 120, the outer case 110 is the inner case 120 by the width of the extension plate of the inner case 120 Spaced outwards. In addition, since the back plate 101 of the inner case 120 serves as the back plate 101 of the outer case 110 at the same time, there is no need for a separate outer case 110 back plate 101. Therefore, the back plate 101 of the inner case 120 is not wrapped by the outer case 110 is exposed. The door 140 is coupled to a front plate (not shown) of the inner case 120 to open and close the cooking chamber 160, and a control box 150 provided with a display part and a button is provided on the right side of the front plate (not shown). It is coupled to form approximately the same plane as 140. The space formed by the right side plate of the inner case 120 and the outer case 110, the front plate (not shown) of the inner case 120, and the right extension plate of the back plate 101 forms the electrical equipment compartment 130. .

The electrical equipment room 130 is provided with a bracket 132 to be coupled to the upper side of the cooking chamber 160 so that the magnetron 131 is coupled. The bracket 132 is bent the plate shape of the metal material is bent one end is coupled to the upper side of the cooking chamber 160 by welding. At the other end of the lower side, a magnetron 131 (Magnetron), which is a high frequency oscillation means, is installed, and a high voltage transformer 133 and a high voltage capacitor 134 for applying a high voltage to the magnetron 131 around it. High Voltage Capacitor) and a cooling fan 135 for cooling these electrical components that become hot at operation are installed on the right side of the rear plate 101 of the inner case 120. A circuit board 137 is provided on the support member 136 that supports and supports the motor (not shown) that drives the cooling fan 135. The circuit board 137 is equipped with a choke coil for removing noise included in the power source and a fuse for preventing overvoltage from being applied to an electrical component, thereby supplying the rectified current to the electrical component of the electronic component room 130. will be.

FIG. 3 is an enlarged view of the bracket 132 surrounding the electrical equipment compartment 130. As shown in the figure, an electric wire fixing hole 105 into which the power cord 200 is inserted and fixed is provided on the rear plate 101 at the upper rear side of the electrical equipment room 130, and the external power is supplied to the circuit board 137. The coupling port 210 of the power cord 200 to supply the components of the electrical equipment room 130 through the insertion is fixed. The power cord 200 is provided with a power line 220 provided with a + line and a-line therein, and a ground line 230 for guiding an abnormal current generated due to overcurrent or overvoltage generated inside the microwave oven to the outside. The power line 220 is coupled to the circuit board 137 provided with the choke coil and the fuse, and the ground line 230 is fastened as a bolt 240 to one end of the bracket 132.

This will be described in detail as follows. An upper end of the bracket 132 is provided with a screw hole 250 to allow the bolt 240 to be coupled. And the end of the ground wire 230 branched from the power cord 200 is coupled to the ground hole 231 is provided with a circular hole 232 therein is installed on the upper side in the screw hole 250 as a bolt 240 Will be combined. Such a microwave oven is to prevent damage to the microwave oven and damage to the user by inducing the electric current to the outside through the ground wire 230 when the insulation of the electrical component is destroyed due to overcurrent, overvoltage or lightning, etc. .

The microwave oven according to the present invention has an advantage of achieving a stable external structure by installing a grounding wire on one side of a bracket to which a magnetron is coupled to the inside of the microwave oven.

Claims (2)

A case in which a cooking compartment and an electrical appliance compartment are partitioned therein, and a ground line coupled to the inner side of the case, which is electrically connected to the case, is provided with a ground line for inducing current flowing into the case to the outside. The method of claim 1, Brackets of a conductive material provided on the outside of the cooking chamber is coupled to a bracket of a conductive material coupled to the magnetron generating a high frequency, the ground wire coupling structure is characterized in that the ground wire is coupled to one side of the bracket to induce current to be conducted to the outside .