Patent ID: 6913449

Claim:
Apparatus for the treatment of metallic workpieces with cooling gas, having a cylindrical housing with an opening for introducing and removing the workpieces, having a cooling-gas source, by means of which blower-conveyed cooling gas guided via heat exchangers is fed to the workpieces, and having a workpiece support with support plates arranged on both sides of the workpiece support, extending vertically and parallel to one another, separating the workpieces from lateral spaces and provided with openings, and having heat exchangers held, at least one of above or below the workpieces, between the support plates, and having blower motors, arranged on both sides of the cylindrical housing, with shafts extending into the lateral spaces horizontally and at right angles to the longitudinal axis of the cylindrical housing, blower wheels, which rotate with the shafts in a blower housing, each being provided close to the inner wall of the cylindrical housing and being separated from the support plates by air-guiding plates which, each held by the blower housings, extend parallel to and at a distance from the support plates and with the support plates each form, on both sides of the workpiece batch, two vertically extending shafts for guiding the cooling-gas stream, reversing flaps being mounted at each of an upper and a lower end of the two air-guiding plates and, depending on the position, sealingly butting against the support plates or against the inner wall of the cylindrical housing.