Control method and microwave heating device
A technology of microwave heating device and control method, applied in microwave heating, electric heating device, electric/magnetic/electromagnetic heating and other directions, can solve the problem of inability to accurately evaluate the cooking and heating curve of food, and inability to accurately calculate the efficiency and detection of energy absorbed by food. The accuracy does not meet the cooking needs and other problems
Active Publication Date: 2022-05-31
GUANGDONG WITOL VACUUM ELECTRONICS MFR
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Problems solved by technology
[0003] However, the microwave reflection detection method is applied to solid-state source microwave heating devices to detect the absorption efficiency of the emitted microwave energy by food. The detection accuracy of only judging that the standing wave is lower or higher than a certain threshold obviously does not meet the cooking needs. Accurately calculate the efficiency of energy absorption of food, so it is impossible to accurately evaluate the cooking heating curve of food
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Then, read the frequency point corresponding to the set frequency, and control the solid-state source to output the microwave signal corresponding to the frequency point, so that the output can be
The microwave signal corresponding to the set frequency is output.
In step S14, the reverse link can be understood as being used to collect the reflected microwaves reflected from the cavity through the antenna
size link. The reverse link may include antennas, circulators, 50ohm loads, reverse couplers and detector tubes to reflect microwave signals.
The signal is reflected into the circulator through the antenna port, and the circulator receives the microwave signal entering the 50ohm load, through reverse coupling
A certain proportion of microwave energy is coupled to the detector and passed through the detector tube. The detector tube can convert the microwave signal into a DC voltage, and then
The reverse link voltage can be obtained. Generally, the voltage of the rever...
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The invention discloses a control method and a microwave heating device. The control method is used in a microwave heating device. The microwave heating device includes a solid state source. The control method includes: controlling the solid-state source to output a microwave signal according to the set frequency and power; obtaining the voltage of the reverse link of the microwave heating device; obtaining the temperature of the solid-state source; obtaining the reflected power corresponding to the voltage according to the frequency and the temperature of the solid-state source . In the above control method, the voltage of the reverse link at different frequencies and powers and the temperature of the solid-state source can be collected, and the method of temperature compensation can be used to ensure that relatively accurate reflected power can be collected, and then can be calculated more accurately. The efficiency with which the food absorbs energy, which facilitates the control of the output power of the solid state source.
Description
Control method and microwave heating device technical field [0001] The present invention relates to the technical field of household microwave heating, in particular to a control method and a microwave heating device. Background technique In related art, the launch module of microwave heating device can realize precise amplitude, phase, frequency to microwave energy. rate control, and the reflected power detection of the transmitting output port only prevents the circulator from being destroyed or the reflected power being too large. Load resistance and final power amplifier tube, so the reflected power detection accuracy of the output port is not high, such as port standing wave division Open circuit (standing wave is infinite), short circuit (standing wave is infinite), 50ohm (standing wave is 1), the standing wave may be 2, 3 under different mismatch loads, 4, 5...etc. The reflected signal detection in the communication field only reports an alarm message when th...
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IPC IPC(8): H05B6/68
CPCH05B6/687H05B6/686Y02B40/00
Inventor 方友平陈茂顺
Owner GUANGDONG WITOL VACUUM ELECTRONICS MFR