Cleaning device and cleaning method

The invention relates to the technical field of article cleaning, in particular to a cleaning device and a cleaning method.The cleaning device comprises a sucking pump and a pipeline, the pipeline is provided with a sucking pump connecting port, a cleaning object connecting port and a nitrogen inlet, and the sucking pump connecting port, the cleaning object connecting port and the nitrogen inlet extend towards the interior of the pipeline to form an intersection area; the pipeline is provided with a first valve for controlling the connection and disconnection of the sucking pump connector and the intersection area and a second valve for controlling the connection and disconnection of the nitrogen inlet and the intersection area, the nitrogen inlet is provided with a water storage container through a first connecting pipe, the first connecting pipe is provided with a third valve, and the water storage container is provided with a water-nitrogen mixed gas outlet; the pipeline is provided with a water-nitrogen m