| 摘要 |
During welding of metals in particular, but also other materials, a high-temperature heat source is used, often an electric arc or a gas flame. The intense heat makes the material from the work piece and adds material evaporate and then condenses outside the hottest zone to form particulate smoke. This smoke can be made to settle out on the work piece or other grounded objects by subjecting it to discharges from a nearby point electrode with high voltage in relation to ground. The flow of charges from a point electrode emanates primarily from the tip itself and is directed in its direction. The charges carry along molecules from the air and an air current is formed in the direction of the tip. By using a high-voltage electrode according to the invention, adapted to simultaneously produce a discharge in various directions, the resulting electric wind is dampened and an improved smoke suppression outcome is achieved. <IMAGE> |
