Suction cleaning apparatus

Suction cleaning apparatus comprising a closed chamber for receiving dust and similar matter together with liquid such as water intermingled therewith and having an outlet at its upper part for suction air flow therefrom;

• an upwardly directed suction duct having an upper outlet end communicating with an upper part of the chamber below the suction flow outlet of the latter, said suction duct having a lower inlet end arranged to be positioned in close proximity with a surface to be cleaned in order to take up by suction dust and similar matter therefrom;
• suction means in communication with the suction flow outlet of the chamber for drawing air therefrom in order to create suction air flow in the chamber and hence in the suction duct;
• return flow means for passing liquid from a lower outlet of the chamber and introducing it directly into the interior of said lower inlet end portion of the suction duct solely for the purpose of intermingling the liquid with dust and similar matter drawn by suction into the duct;
• a filter screen disposed adjacent to the lower outlet of the chamber and arranged between the chamber interior and the lower outlet and acting to filter liquid passing from the lower outlet so as to separate dust and similar matter therefrom;
• and,
• a substantially horizontal deflector plate mounted in the chamber below the suction flow outlet thereof but over the upper outlet end of the suction duct and extending over a substantial part of the lower interior of the chamber in order to deflect liquid laden with dust and similar matter into the chamber as said laden liquid entrained with the suction air flow discharges from the upper outlet end of the suction duct and also to assist separation of the laden liquid from the air on reduction in velocity of the laden liquid and suction air flow, the separated air flow then passing from under the deflector plate to the suction flow outlet of the chamber and thence to the suction means.

Suction cleaning apparatus comprising a closed chamber for receiving dust and similar matter together with liquid such as water intermingled therewith and having an outlet at its upper part for suction air flow therefrom and a lower outlet for liquid flow therefrom;

• a filter screen adjacent to the lower outlet of said chamber for filtering liquid from dust and similar matter in the chamber;
• an upwardly directed suction duct having an upper outlet end communicating with an upper part of the chamber below the suction flow outlet of the latter, said suction duct having a lower inlet end arranged to be positioned in close proximity with a surface to be cleaned in order to take up by suction dust and similar matter therefrom;
• suction means in communication with the suction flow outlet of the chamber for drawing air therefrom in order to create suction air flow in the chamber and hence in the suction duct;
• passageway means downwardly directed from the chamber providing communication between the suction means and the suction flow outlet of the chamber the suction means communicating with the passageway means at substantially a right angle and the passageway means being of large bore for effecting separation by inertia of any residual liquid from the suction air flow, as the air is drawn by the suction means via said passageway means from the chamber;
• return flow means for passing liquid draining through the filter screen from dust and similar matter in the chamber to a lower interior part of the suction duct in order to introduce liquid therein solely for the purpose of intermingling with dust and similar matter drawn by suction into the duct;
• and,
• a substantially horizontal deflector plate mounted in the chamber below the suction flow outlet thereof but over the upper outlet end of the suction duct and extending over a substantial part of the lower interior of the chamber in order to deflect liquid laden with dust and similar matter into the chamber as said laden liquid entrained with the suction air flow discharges from the upper outlet end of the suction duct and also to assist separation of the laden liquid from the air on reduction in velocity of the laden liquid and suction air flow, the separated air flow then passing from under the deflector plate to the suction flow outlet of the chamber and thence to the suction means.