Air cleaner for removing air pollutants from an air stream

摘要

The present invention relates to an air cleaner for removing air pollutants from an air stream, for instance such as the cleaning exhaust/intake gas of an amusement machine, said air cleaner comprising a filter device including at least one filter layer (4a, 4b) held by a filter holder (5) in said airflow substantially perpendicular to a main flow direction thereof and including a plurality of preferably stick-shaped filter elements (6) neighbouring each other. In accordance with the present invention, the filter device has no closed surrounding along the circumference of the filter layers, but provides for an open side along at least a portion of the periphery of the filter layer. At least one circumferential side section (7, 8) of the filter layer parallel to or tangential to the longitudinal axis of an outermost filter element is formed as an open side free of flow control elements surrounding the filter layer. Contrary to the prior art where the filter layer is usually enclosed in a tubular flow channel, the present invention avoids such flow-control-elements for guiding the air stream through the filter layer and/or preventing the airflow from diverging away from the filter layer, wherein in particular the filter layer, at its open side, is dispensed with flow-control-elements such as flow guiding surfaces, flow channel walls, fences or housing walls surrounding the filter layer.

主权项

1. An air cleaner for removing air-polluting materials from an airflow, comprising
a filter device (1) which includes at least one filter layer (4) held by a filter holder (5) in said airflow (3) substantially perpendicular to a main flow direction thereof, said at least one filter layer formed by a plurality of stick-shaped filter elements (6) for absorbing or adsorbing the air-polluting materials on a surface of the stick-shaped filter elements (6), wherein said at least one filter layer (4) has a periphery going along an outermost one of said plurality of stick-shaped filter elements (6e) and/or end portions of said plurality of stick-shaped filter elements (6), wherein the air cleaner further comprises a mounting frame (26) surrounding said at least one filter layer (4) at the periphery thereof wherein said mounting frame (26) is provided with an insertion recess (27), an inside surface of the insertion recess (27) fully overlapping the at least one filter layer (4) when viewed in an airflow (3) direction, wherein the filter holder of the at least one filter layer (4) is in contact with the inside surface of the insertion recess (27), thus enabling insertion and removal of the at least one filter layer (4) into and from the mounting frame (26) in a direction perpendicular to a plane defined by the at least one filter layer (4), wherein said plurality of stick-shaped filter elements (6) are held with each other by a holding element (9), wherein the insertion recess holds the at least one filter layer along at least the periphery formed by the end portions of the plurality of stick-shaped filter elements, and wherein opposite ends of the plurality of stick-shaped filter elements (6) and/or the holding element (9) are press-fitted into the insertion recess (27).