Power control method of radio frequency heating module and radio frequency heating device

Abstract

The invention discloses a power control method of a radio frequency heating module and a radio frequency heating device. The method comprises the steps of controlling the radio frequency heating module to transmit an electromagnetic wave, and adjusting the transmitting power to a set power; determining a maximum value Imax and a minimum value Imin of an input current according to the set power; and detecting an input current I of the radio frequency heating module, wherein when I is greater than Imax, the radio frequency heating module reduces the amplitude of electromagnetic waves transmittedby the radio frequency heating module and reduces the transmitting power, and when I is less than Imin, the radio frequency heating module increases the amplitude of electromagnetic waves transmittedby the radio frequency heating module and increases the transmitting power. According to the invention, whether the operation of the radio frequency heating module is normal or not is sensed by detecting the input current of the radio frequency heating module in real time; the input current of the radio frequency heating module is adjusted by adjusting the amplitude of the electromagnetic wave when the radio frequency heating module is abnormal, and the transmitting power of the radio frequency heating module can be controlled to be stable by controlling the input current within the preset range, so that the heating quality is improved, and the user experience is improved.

Description

Technical field [0001] The invention belongs to the technical field of heating devices, and relates to a radio frequency heating technology, in particular, to an electromagnetic wave emission power control technology applied to a radio frequency heating device. Background technique [0002] Current heating devices such as electric ovens and microwave ovens mostly use microwave heating technology using magnetrons as emission sources. For this kind of additional device, the power supply of the magnetron is mostly used such as figure 1 The circuit design shown includes the main components such as switch K, transformer HVT, capacitor C and diode D. Among them, for the on-off control of the switch K, a PWM control method is generally adopted, and the on-off timing of the switch K is changed by adjusting the duty ratio of the PWM signal, and then the power control of the heating device is realized. For example, if the duty cycle of the PWM signal is 100%, the switch K will remain clos...

AI Technical Summary

Problems solved by technology

[0004]However, in the current RF heating device, the RF heating module cannot sense whether the RF heating module is operating normally according to the predetermined power during the working period

If the RF heating module does not operate normally according to the predetermined power during the heating time set by the user or the cooking program selected by the user, the food will be overcooked or undercooked, which will seriously affect the user experience

Images