Vacuum cleaner for natural and synthetic fibre surfaces - has corona type electrode and counter-electrode immersed in air producing negative and positive ions

摘要

The device is used for removing dust from natural or artificial fibre surfaces by vacuum suction and has a housing connected to a suction device. Wheels and a rotary brush are also provided. To neutralise any electrostatic charge on the dust or surface before and after brushing to facilitate dust pick-up, a source of positive and negative ions is provided in the housing. The source comprises a corona electrode bar (1) provided with a number of points (14) which project through a dielectric sleeve (21) covering the bar. The bar is surrounded by a cylindrical receptor electrode spaced from the bar and provided with holes (220) opposite the bar points. An alternating voltage below discharge level is applied across the electrodes to generate ions by a 'corona' effect, the bar electrode having a very small radius of curvature in cross-section. The device may be used for record cleaning.