Ignition knob assembly, range hood, kitchen range and kitchen range linkage equipment and system

The utility model provides an ignition knob assembly, a range hood, a kitchen range and a kitchen range linkage device and system. The ignition knob assembly comprises an ignition knob, the ignition knob comprises a shell, a mounting base, a transmission assembly, a detection device and a stove communication device, the mounting base, the detection device and the stove communication device are arranged in the shell, the transmission assembly is arranged on the mounting base, and the lower end of the transmission assembly extends out of the lower surface of the shell from the interior of the shell; the detection device detects the spatial state of the transmission assembly and generates fire detection signals representing different fire power according to the spatial state, and the stove communication device transmits the fire power detection signals to the range hood to control the working state of the range hood; the upper surface of the layered driving piece is provided with a high-low plane, the ignition k