| 摘要 |
PURPOSE:To render the distribution of temperature in an enclosed chamber uniform, by producing forced flow of air in the enclosed chamber. CONSTITUTION:A suction port 4 is opened at the central portion in the top plate of an enclosed, hollow chamber 1, and a rotatable means a consisting of rotatable blades 6 driven by a motor 5 is fitted in the suction port 4 for drawing air in the hollow chamber 1 to the outside and defining a frictional heat generating section A in the operational range of the means a. Further, rotatable blades 8 are arranged downward of the rotable means a with some spacing from the same to constitute a driven, rotatable mechanism Y which is turned by the viscosity of air drawn by the means a. The rotatable blades 8 discharges air in the hollow chamber 1 to the outside at the time of starting operation of the apparatus. However, when pressures on the outside and inside of the chamber 1 are balanced and heating process is started, they function to draw air upward at the central portion and to direct air downwardat the circumferential portion as shown by arrows in the drawing, so that forced convection of air is produced in the enclosed, hollow chamber. |
