High and low-voltage transformer for micro-wave oven

Abstract

The invention discloses a high and low voltage common transformer of a microwave that comprises a high voltage main coil which is connected with a power source and a high voltage secondary coil which is used for forming the secondary pole of the high voltage main coil and is used for the power supply of a magnetron of the microwave. A relay is arranged between an output end of the high voltage secondary coil and the magnetron of the microwave. The secondary pole of the high voltage main coil is also provided with a low voltage secondary coil which is connected with a PCB plate of a control circuit of the microwave and is used for the power supply of the control circuit of the microwave. The relay is arranged on the PCB plate of the control circuit of the microwave. A normally open contact of the relay is connected between the high voltage secondary coil and the magnetron of the microwave. The relay coil is connected on a control chip of the PCB plate 3 of the control circuit of the microwave. As the high and low voltage common transformer of the microwave is added with a group of independent secondary coils on the secondary pole of the high voltage transformer, a low voltage transformer is composed to supplie power to the low voltage circuit, thus the whole circuit has simple structure; the production cost is lowered and the production efficiency is improved.

Description

technical field [0001] The invention relates to a transformer for a microwave oven. In particular, it relates to a high and low voltage shared transformer of a microwave oven with simple circuit structure and low cost. Background technique [0002] Generally, microwave ovens use high frequency (about 2,450MHz per second) as the heating source, and use the frictional heat between molecules to heat food by disrupting the molecular arrangement of food. [0003] Such a microwave oven is equipped with a magnetron that emits microwaves inside the electric control room; a high-voltage transformer that provides high voltage to the magnetron; a blower fan used to cool various electrical components inside the fuselage and a fan that drives the blower fan Various parts such as motors [0004] like figure 1 As shown, for the microwave oven in the prior art, the high-voltage transformer and the low-voltage transformer are provided separately. The primary coil 11 of the high voltage t...

AI Technical Summary

Problems solved by technology

[0005] However, the arrangement structure of the above-mentioned high-voltage and low-voltage transformers makes the circuit arrangement more complicated, and also causes waste of raw materials and reduces production efficiency.

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