Microwave oven with double-layer stirring fan

Abstract

The invention discloses a microwave oven provided with two-layer stirring fans. A first stepper motor controlling uniformity of microwaves and a second stepper motor controlling microwave emissive power are arranged under a soleplate of the microwave oven; a rotating shaft of the second stepper motor passes through the soleplate and drives a driver gear to rotate; the driver gear drives a driven wheel which is meshed with the driver gear to rotate; a rotating shaft which is of a lug boss shape and used for mounting a lower layer of stirring fans which control the microwave emissive power, is formed on the driven wheel,; a through hole is arranged in the center of the driven wheel and the rotating shaft; a rotating shaft of the first stepper motor passes through the through hole; an upper layer of stirring fans which control the uniformity of the microwaves are arranged on the rotating shaft of the first stepper motor. The drive and control structure of the invention is simple, thereby reducing total time of heating up food and increasing utilization rate of electrical energy.

Description

technical field [0001] The invention relates to a microwave oven, in particular to a microwave oven with a double-layer stirring fan. Background technique [0002] In general, a microwave oven is a device that uses high-frequency (about 2450MHz per second) microwaves as a heating source to cook food through the frictional heat generated by disrupting the order of food molecules. Such microwave ovens are roughly classified into: a method in which a turntable on which food is placed is rotated in order to uniformly supply microwaves to the food in the cavity; and a system using a stirring fan to uniformly supply microwaves to the food in the cavity. Of course, the above two methods can be used at the same time. figure 1 It is an internal partial structure diagram of a microwave oven in the prior art using a stirring fan. This microwave oven is mainly provided with a stirring fan assembly in the bottom or upper part or side space of the oven cavity forming the cooking chamber...

AI Technical Summary

Problems solved by technology

[0004] However, the stirring fan of the microwave oven in the prior art can only control the transmitting power of the microwave because there is only one stirring fan. If a stirring fan is used to control both the up and down movement and the speed, see Chinese patent 200410001023.0, the drive of the motor is complicated and prone to Fault

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