Multi-frequency solid state microwave oven and heating method using multi-frequency microwave oven

Abstract

The invention discloses a multi-frequency solid state microwave oven and a heating method using the multi-frequency microwave oven. The heating method comprises the following steps that a working frequency and / or a working band in the working process of a microwave oven is determined by a central control unit, transmitting a first indicating signal for indicating the working frequency and / or the working band to a multi-frequency information source, and transmitting second indicating signals for gating power amplifier units corresponding to the working frequency and / or the working band to a frequency gating switch; after the first indicating signal is received by the multi-frequency information source from the central control unit, generating a microwave signal of which the frequency is theworking frequency and / or the working frequency located on the working band, and after the second indicating signal is received by the frequency gating switch from the central control unit, gating thepower amplifier units indicated by the second indicating signal; and radiating units receive the microwave signal outputted by a multi-frequency solid state source, and according to the microwave signal, inspiring electromagnetic field in a microwave oven cavity. Through the adoption of the heating method disclosed by the invention, the varied frequency range cover of microwave heating can be realized; and flexible selection of different frequencies, the optimal heating effect is achieved.

Description

technical field [0001] The invention relates to the field of microwave heating, in particular to a multi-frequency solid-state microwave oven and a heating method using the multi-frequency solid-state microwave oven. Background technique [0002] The microwave heating method has replaced the traditional heating method in many fields due to its advantages of uniform heating, high quality, high efficiency, and strong penetrating power. [0003] Microwave heating is typically used in the field of microwave ovens. Microwave ovens generate a microwave electromagnetic field, which heats the food to be heated to polarize the water molecules in the heated food. The polarized water molecules move at high speed with the direction of the field, thereby realizing For heating, compared with the traditional heating method that relies solely on the different principles of heat transfer, the microwave heating method is more efficient, and it adopts the method of simultaneous internal and ex...

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Problems solved by technology

[0004] The traditional microwave oven generates a signal source through a magnetron. Since the magnetron is an electric vacuum device, it has many shortcomings such as unstable output power, needing a thousand volts of high voltage work, large volume and weight, and difficult integration and control, which is not conducive to intelligence. integrated design

[0005] Traditional microwave ovens usually work in a narrow frequency band near 2.45GHz, and use a single frequency band to achieve heating. The traditional heating method is not ideal for heating food with large size and high loss, and the working efficiency of microwave ovens is reduced.

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