Wave guide structure of microwave oven

Abstract

The invention discloses a microwave oven, in particular to a waveguide tube structure for a microwave oven capable of guiding microwave into a cooking chamber. The technical problem to be solved is that the invention provides a waveguide structure for microwave oven with simple structure and capable of reducing microwave reflection coefficient. The waveguide structure of the microwave oven comprises a magnetron insert slot, an inclined top wall, a U-shaped lower wall, wherein the U-shaped lower wall is shorter than the inclined top wall and is parallel to an antenna; and grooves are formed on the inclined top wall. The grooves arranged horizontally and vertically on the inclined top wall of the waveguide tube can prevent a portion of microwave energy from returning to the magnetron, thus effectively improving the heat feedback and aggregation of the magnetron, and prolonging the service life of the magnetron.

Description

technical field [0001] The present invention relates to a microwave oven, and more particularly to a structure of a microwave waveguide for guiding microwaves into a cooking chamber. Background technique [0002] Microwave is a kind of high-frequency wave, which changes at a speed of 2.4 billion times per second, causing high-speed motion of water molecules, causing water molecules to rub against each other to generate heat, in order to achieve the purpose of heating food, and can heat the inside and outside of the food at the same time, so Microwaves are widely used in the cooking of many kinds of food. [0003] Microwaves are used in the microwave oven to heat food, and the magnetron generates microwaves, which are introduced into the cooking chamber through wave guides. Such as figure 1 As shown, the cavity 1 plays a role as a frame inside the microwave oven, and a cooking chamber 3 for cooking is formed inside the cavity 1, and an electric control room 5 is arranged on...

AI Technical Summary

Problems solved by technology

However, the existing waveguide has the following disadvantages: when the microwave is irradiated in the waveguide 9 through the antenna, it can be seen from the impedance matching diagram that the reflection coefficient of the microwave is relatively large, close to 1, and a lot of microwave energy will be reflected back to the waveguide 9. The magnetron makes the magnetron heat up, which can easily lead to the damage of the magnetron

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