Just cut the power cord plugged into the vacuum cleaner and connect a 220V to 12V DC power adapter. If there is no adaptation, plugging directly into the 220 volt power interface will damage the car vacuum cleaner. However, it is not recommended that the owner do so, after all, it is more dangerous to change the line, and the invention of the car vacuum cleaner is mainly used in the car, so its power and capacity are not suitable for the home, compared with the ordinary household vacuum cleaner is far worse.
The simple way is to use four short wires, first connect the switch, then unplug the outer layer of the power cord, connect it in parallel to the power cord, and then close the switch, and then cut the original power cord to do processing, so that you can ensure constant power operation.