Method of cleaning relays

A method of cleaning a relay, the method including:

• a loading step:
• placing a relay on a feeding platform of a machine, and directing a laser processing head of the machine to allow emission of laser light towards the relay;
• and
• a surface treatment step:
• activating the laser processing head to perform laser surface treatment on a portion of the relay to be treated, a low-intensity laser light emitted from the laser processing head utilized during the surface treatment, and
• a cleaning step:
• moving the surface-treated relay under a hood and moving the hood downward to fully cover the relay and within the hood jetting gas onto surface-treated portions of the relay, wherein a high-pressure sprayer is disposed within the hood in the cleaning step to allow high-pressure jetting after the relay is fully covered by the hood, so as to enable removal of residues from inside the relay and block splattering of the residues by the hood, the machine includes a suction device and an exhaust pipe, the exhaust pipe has one end connected to the suction device and the other end connected to and internally communicated with the hood, while the high-pressure sprayer performs high-pressure jetting on the relay, the suction device operates and sucks gas from inside the hood through the exhaust pipe to collect the residues sprayed by the high-pressure sprayer inside the hood.