Microwave oven magnetron control circuit

Abstract

This invention provides a control circuit for magnetron of microwave oven, which mainly comprises the magnetron to generate main microwave heat source, relay of on / off magnetrons, switches of the on / off relay and a microcomputer to control the switch to let the drive magnetron output relevant control signals, wherein, there located in the noise monitor part to monitor signals with noises and prevent the noise signals output on the output end of control signal of the microcomputer. This invention is to cut off the microcomputer signals with noise and to ensure the working stability of the magnetron and to improve the reliability of the whole property of the microwave oven by use of the noise monitoring part formed with transistor , capacitor and its resistance according to the magnetron control circuit of the microwave oven.

Description

technical field [0001] The invention relates to a microwave oven, in particular to a magnetron control circuit of the microwave oven which can prevent the malfunction of the magnetron caused by noise. Background technique [0002] Now, many families are using household appliances for processing food, such as gas stoves, gas ovens, microwave ovens, electric ovens and so on. [0003] Here, a microwave oven is a device that uses microwaves generated by a magnetron installed inside as a main heat source, and heats food in the heating part as an object to process food. [0004] Generally, a microwave oven can be divided into two parts: a heating part for processing food and an electrical part for outputting microwaves. [0005] The electrical part of the microwave oven mainly includes a high-voltage transformer capable of driving a magnetron and a magnetron driven by the high-voltage transformer to output microwaves. [0006] In the electrical department, it is easy to mix vari...

AI Technical Summary

Problems solved by technology

[0014] However, according to the magnetron control circuit of the microwave oven in the prior art, when the microcomputer is out of control due to internal or external noise interference, the transistor Q1 will continue to be turned on, and the problem of continuously driving the magnetron 1 to work will occur.

[0015] That is, when the microcomputer is out of control caused by noise, the magnetron cannot be effectively controlled, and the stability of the magnetron cannot be guaranteed.

Images