Patent ID: 7913351

Claim:
A cleaning apparatus that removes deposits attached to a structural object to clean the structural object, comprising: a jetting unit adapted to jet out a mixture of a substance in gaseous form and the same substance in liquid form or solid form as the former toward the deposits; a suction unit adapted to suck the jetted mixture and the deposits to which the mixture has been jetted; and a pump to which said jetting unit and said suction unit are connected, wherein a jet port of said jetting unit is surrounded by a suction port of said suction unit and opens in the suction port, said pump comprises a first impeller corresponding to said jetting unit and a second impeller corresponding to said suction unit, and said first impeller is disposed coaxially with said second impeller, and blades of said first impeller have inclinations opposite to inclinations of blades of said second impeller.