How the Air Fryer's Circuit Works

Plug in the power supply, only when the oil drip barrel (pan) is placed normally, its micro switch K is turned on, the 12V switching power supply and the 5V regulated power supply can work, and the control system is powered on. The program self-checks, when the temperature and the position of the flip handle are normal, the buzzer emits a long "di" sound, the relay J is turned on, and the digital tube displays "000", ready to start the machine. Then, set the baking program on the control panel, press the "start" button, and the machine starts to work. During the baking period, when the temperature reaches the set value, the single-chip microcomputer will issue a stop light-wave tube heating instruction; when the temperature is lower than the set value, the single-chip microcomputer sends a light-wave tube heating command, which continues to alternate until the end of the time. In the middle of baking, if you want to open the flip cover and brush oil on the food to be grilled, you can directly lift the flip cover handle, and the micro switch at the handle shaft is disconnected. , the light wave heating tube, the fan, and the rotary motor of the grill will stop running immediately. When the flip cover is restored, the original program will resume to continue the baking work. In the circuit, the digital tube shows the time, the red LED shows the set baking mode, and the green LED is the working indicator. When the temperature fuse exceeds the maximum temperature limit or a serious short-circuit fault occurs, the power supply of the whole machine is cut off, and the normal operation can only be resumed after the fault is removed and the new temperature fuse is replaced.

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