| 摘要 |
The conditioning element comprises a perforated plate (1) comprising a front plate with a planar rear side and a base plate (4) with a front side, and a tube (3) connected to the base plate. The base plate is provided on the rear side of the front plate. The connection between the base plate and the tube is formed by ultrasonic welding or laser welding, and is present in the form of a weld seam (5) longitudinally extending along the tube. The tube has straight sections connected to other by curved portions. Each straight portion of the tube is connected to the base plate. The conditioning element comprises a perforated plate (1) comprising a front plate with a planar rear side and a base plate (4) with a front side, and a tube (3) connected to the base plate. The base plate is provided on the rear side of the front plate. The connection between the base plate and the tube is formed by ultrasonic welding or laser welding, and is present in the form of a weld seam (5) longitudinally extending along the tube. The tube has straight sections connected to other by curved portions. Each straight portion of the tube is connected to the base plate. The base plate is respectively formed as a strip. A rear side of the base plate is connected with the perforated plate facing a front side of the tube. The tube or a portion of the tube is arranged on first and second sides of the base plate. The base plate is provided with an integral connecting portion, which is welded to the perforated plate facing away from the rear side of the tube. The connecting portion is integral with the base plate. The front plate has comprises an acoustic membrane on which the base plate is arranged. The membrane is provided on and connected to the rear side of the perforated plate. The base plate is connected to the acoustic membrane. |
