Waveguide assembly and microwave rice cooker

Abstract

The invention discloses a waveguide assembly and a microwave rice cooker. A cover plate (62) of the waveguide assembly (6) includes a horizontal cover plate (621) and a longitudinal cover plate (622). A base plate (61) is in a Z shape and consists of a first horizontal base plate (611), a lower extending plate (612), and a second horizontal base plate (613); base plate flanges (614) are formed at the peripheral edges of the base plate; and the cover plate covers the flanges of the base plate, thereby forming a microwave transmission cavity (63). The microwave transmission cavity includes a horizontal cavity and a longitudinal cavity, wherein the horizontal cavity and the longitudinal cavity are mutually communicated; the horizontal cover plate and the first horizontal base plate are arranged at an interval along the longitudinal direction to form the horizontal cavity; and the longitudinal cover plate and the lower extending plate are arranged at an interval along the horizontal direction and the longitudinal cover plate extends to the second horizontal base plate to form the longitudinal cavity. The waveguide assembly has advantages of small size, compact structure, and short transmission distance and is suitable for being installed in a microwave rice cooker having a cylindrical cooking cavity, thereby realizing high-efficiency microwave energy transmission and the excellent microwave matching performance.

Description

technical field [0001] The invention belongs to the field of household appliances, and in particular relates to a microwave heating product. Background technique [0002] Common microwave ovens in daily life are modern cooking stoves that use microwaves to heat food, and their power ranges from 500 to 1000 watts. figure 1 As shown, it is generally made up of parts such as power supply, magnetron 11, control circuit and cooking cavity. The power supply provides a high voltage of about 4000 volts to the magnetron 11. Under the excitation of the power supply, the magnetron 11 continuously generates microwaves, and then passes through the waveguide assembly 6 to couple into the cooking cavity. Near the entrance of the cooking cavity, there is a rotatable stirrer. Since the stirrer is a fan-shaped metal sheet, it can reflect microwaves in all directions after rotating, so it can evenly distribute microwave energy in the cooking cavity. thereby heating the food. [0003] Such a...

AI Technical Summary

Problems solved by technology

Due to the large volume of the cavity, the length of the waveguide assembly 6 is relatively long. When the microwave is introduced into the bottom of the cavity from the magnetron 11 installed sideways through the waveguide assembly 6, and then fed into the microwave cavity, the microwave conduction distance is long, resulting in Microwave transmission loss is large

Specifically, when the microwaves generated by the magnetron 11 are transmitted in the microwave tube, if the transmission path is long, it is easy to form microwave concentration, so that the distribution of microwaves in the microwave transmission cavity in the waveguide is uneven, and it is easy to cause multiple microwaves in the microwave transmission process. Focusing on the ignition causes a local temperature rise on the surface of the microwave tube, a large loss of microwave energy, and poor stability of the output efficiency of the microwave component 6, which cannot effectively ensure the heating uniformity and the best cooking effect in the cooking process.

[0005] In addition, there are a variety of microwave stirrers in the existing microwave ovens, but their shapes and structures are mostly designed as various hollow sheet structures to adapt to the square cooking cavity. However, it is always difficult to make the microwave in the square cavity achieve continuous Excellent distribution effect

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