| 摘要 |
At least one cylinder-shaped resistance (1) is arranged inside a cylinder-shaped housing (2), the two forming a ring shaped chamber (3) open at its ends and guiding a cooling air current about and along the resistance. At the input opening of the housing for the feed of the air current into the ring gap, there are provided regulators (5,6,7,8) for controlling the flow. Pref. the housing is coaxial with the resistance and the housing forms a mounting and support for the resistance. The regulators are pref. a shutter system with a fixed device with holes and a movable device with holes cooperating with the fixed holes to allow full or partial opening. |
