KR960000408Y1 - Control panel for microwave range - Google Patents

Abstract

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Description

Control panel PCB installation structure of microwave oven

1 is a block diagram of the control panel PC installation of the conventional microwave oven

2 is a cross-sectional view showing a control panel PC installation structure of the microwave oven according to the present invention

* Explanation of symbols for main parts of the drawings

1: battlefield room 2: chassis

11: first PCB 12: second PCB

13 through hole 14 film wire connector

The present invention relates to a control panel (PCB) installation structure of the microwave oven, in particular, the control panel of the microwave oven to prevent the components of the PC by blocking the radiation noise and conduction noise generated in the electrical equipment room to prevent malfunction It relates to a PC installation structure.

As shown in FIG. 1, in the conventional microwave control panel PC installation structure, a long hole 3 corresponding to the size of the PC is punched in the chassis 2 of the electric compartment 1, and the control panel portion 4 is formed. The PC 5 is fixedly installed so that the component mounting surface is exposed to the outside, and the control panel portion 4 is screwed to the outer side of the chassis 1 of the electrical equipment chamber 1, Through the long hole (3) is mounted so that the component mounting surface of the PC (4) exposed to the electrical equipment room (1).

On the other hand, the PCB 5 of the control panel portion 4 is equipped with a number of components such as various semiconductor chips, LEDs, relays, the components are exposed to the inside of the electrical chamber 1, and inside the electrical chamber Is equipped with a magnetron (7), a high-voltage transformer (8) and a cooling fan, and the components in the electric compartment (1) are connected by the control panel unit 4 and the electric conductor, respectively, to control the control panel unit. It is to be received.

By the way, the noise is generated in the magnetron 7 provided in the electrical equipment chamber 1, the high voltage transformer 8, the cooling fan motor and the like. For example, micro-wave leakage may occur at the contact portion of the magnetron 7 and the waveguide or at the inlet 6 of the heating chamber, and at the high voltage transformer 8 and the cooling fan motor. Conduction noise may occur.

Therefore, according to the conventional control panel PC installation structure of the microwave oven, some components including the microcomputer among the components mounted on the PC 5 of the control panel are very weak to noise, which is generated in the electric compartment 1. Radiation noise such as microwave liquid generated by the high frequency of the magnetron 7 and conduction noise generated from the high voltage transformer 8 and the cooling fan motor are transmitted to the microcomputer, which may cause a malfunction in some cases. Often on some models this is a big problem.

As a countermeasure against such noise, a separate noise filter may be used for the fan motor, etc., and the noise is reduced by adding various components for noise prevention to the PCB itself, thus increasing the number of components for noise prevention. And there is a problem in that the size of the PC is large because the mounting space of the anti-noise components are required.

The purpose of the present invention is to improve the weakness of the conventional noise by mounting the PC on the outside of the electric room chassis without breaking the electric chassis, the control panel PC installation structure of the microwave oven is not affected by noise. It is to provide.

The object of the present invention is to provide a first PCB in which parts of the control panel are equipped with weak parts of noise, and a second part in which parts having a relatively large size and strong parts of noise are mounted, without punching the front chassis of the electronic cabinet. After separating the PCB, the first PCB is mounted in the space between the chassis outside of the battlefield and the control panel part 4, the second PCB is mounted inside the chassis of the battlefield, It is achieved by forming and passing the film wire connector through the opening to the inside and outside of the electrical chamber to connect the signal lines of the first PCB and the second PCB.

Hereinafter, with reference to the accompanying drawings an embodiment of the control panel PC installation structure of the microwave oven according to the present invention will be described in detail.

2 is a cross-sectional view showing the control panel PC installation structure of the microwave oven according to the present invention, as shown in this, without the front chassis (2) of the electric chamber 1, the PC of the control panel is weak to noise After separating the first PCB (11) to which the parts are mounted and the second PCB (12) to which the parts having relatively large size and noise resistance are mounted, the first PCB (11) is separated from the electrical equipment room (1). Mounted in the space between the outside of the chassis 2 and the control panel portion 4, the second PC 12 is mounted inside the chassis (2) of the electric compartment 1, through the chassis (2) (13) to form a film wire connector 14 through the through hole 13 to the inside and outside of the electrical chamber 1 to connect the signal lines of the first PC11 and the second PC12 (12) It is composed of a structure.

According to the control panel PCB installation structure of the pendulum range according to the present invention, since the first PCB 11 is fixed to the outside of the chassis 2 of the electric compartment 1, the parts are weak to noise such as high frequency. That is, the semiconductor elements such as the microcomputer are blocked by the chassis 2 from the noise such as the leaked high frequency so as not to be affected by the noise.

On the other hand, since the second PC 12 is mounted inside the chassis 2 of the battlefield 1, the components in the battlefield 1, ie, magnetron, high-pressure transformer and cooling fan, are mounted through the second PC 12. Electric wires are connected to the motor and can be controlled.

Accordingly, the wiring can be simplified. In addition, since signal lines are connected between the first PC 11 and the second PC 12 through the film wire connector 14, conduction noise is not conducted.

As described above, according to the present invention, since the first PC 11 having the components susceptible to noise is completely blocked by the electrical chamber 1 and the chassis 2, the radiated noise is not completely transmitted to the microcomputer or the like. In addition, since the first and second PCBs 11 and 12 are connected by the film wire connector 14, and the film wire connector 14 is connected through the small through hole 13, conduction noise In addition, the PCP pattern is much reduced than when exposed in the electric compartment 1. As a result, it is hardly influenced by noise, so that an additional noise prevention filter or prevention circuit and its components can be reduced to some extent, and the size of the PC can be reduced. It works.

Claims (1)

After separating the PCB of the control panel into a first PC 11 having components that are weak in noise and a second PC 12 having components having a relatively large size and resisting noise, the first PC 11 is installed. ) Is mounted in the space between the outside of the chassis 2 of the electrical equipment compartment 1 and the control panel portion 4, and the second PC 12 is mounted inside the chassis 2 of the electrical equipment compartment 1; A small through hole 13 is formed in the chassis 2, and the film wire connector 14 passes through the through hole 13 to the inside and the outside of the electrical equipment chamber 1 so that the first PC 11 and the second can be formed. Control panel PC installation structure of the microwave oven, characterized in that for connecting the signal lines of the PC (12).