Patent ID: 6398852
Filing Date: 2002-06-04
Classification: B03C,F24F,Y02A

Abstract:
Device (1; 1â€²; 1â€³; 1â€²â€³; 1â€³â€³; 1â€²â€³â€³) for air cleaning, said device (1; 1â€²; 1â€³; 1â€²â€³; 1â€³â€³; 1â€²â€³â€³) including an air flow channel (2; 2â€²; 2â€³; 2â€²â€³; 2â€³â€³; 2â€²â€³â€³;), an air transporting mechanical fan (3; 3â€²; 3â€³; 3â€²â€³; 3â€³â€³; 3â€²â€³â€³), a precipitator (4; 4â€²; 4â€³; 4â€²â€³; 4â€³â€³; 4â€²â€³â€³), a high voltage source (5; 5â€²; 5â€³; 5â€²â€³; 5â€³â€³; 5â€²â€³â€³), said precipitator (4; 4â€²; 4â€³; 4â€²â€³; 4â€³â€³; 4â€²â€³â€³) including two band-shaped electrode elements that are wound several times around an axis or bobbin body (7; 7â€²; 7â€³; 7â€²â€³; 7â€³â€³; 7â€²â€³â€³), a gap distance being present between adjacent electrode elements, the respective electrode elements being electrically connected with each terminal of the high voltage source (5; 5â€²; 5â€³; 5â€²â€³; 5â€³â€³; 5â€²â€³â€³), and the precipitator (4; 4â€²; 4â€³; 4â€²â€³; 4â€³â€³; 4â€²â€³â€³) is arranged downstream from the fan (3; 3â€²; 3â€³; 3â€²â€³; 3â€³â€³; 3â€²â€³â€³), characterized in that the axial distance (a), seen in the air flow direction, between the fan (3; 3â€²; 3â€³; 3â€²â€³; 3â€³â€³; 3â€²â€³â€³) and the precipitator (4; 4â€²; 4â€³; 4â€²â€³; 4â€³â€³; 4â€²â€³â€³) is less than 4R, where R is equal to the radius of the air flow channel (2; 2â€²; 2â€³; 2â€²â€³; 2â€³â€³; 2â€²â€³â€³) or the smallest radial distance from the centre of the precipitator (4; 4â€²; 4â€³; 4â€²â€³; 4â€³â€³; 4â€²â€³â€³) to the envelope source of the air flow channel (2; 2â€²; 2â€³; 2â€²â€³; 2â€³â€³; 2â€²â€³â€³), said radius or said smallest radial distance being measured in connection with the precipitator (4; 4â€²; 4â€³; 4â€²â€³; 4â€³â€³; 4â€²â€³â€³).