| 摘要 |
PURPOSE:To obtain a blade, simple in structure and easy to assemble, which is intended to exchange heat by producing currents of air differed in temperature on the opposite sides of the blade in the form of a corrugated plate, by forming projections respectively on a main plate located at the central portion of rotation and a circumferential plate, and fixing the corrugated plate by use of these projections. CONSTITUTION:A main plate 1 is provided at its central portion with a boss for fixing a turning shaft, and triangular projections 4 are formed along its peripheral portion alternately on both sides of the plate 1. Further, similar projections 5 as the projections 4 are formed along the inner peripheral portion of a circumferential plate 3 which constitutes the circumferential portion of a blade. With such an arrangement, a blade 2 in the form of a thin plate made of a material having a high heat conductivity is extended between the projections 4 and 5 in the manner of straddling the same and fastened securely in plate by way of bonding or by means of screws or the like. |
