| 摘要 |
PURPOSE:To reduce the blasting loss and to efficiently perform the heat exchange by forming the blade portion of an impeller into a corrugated shape having radial grooves forming blast paths on both surfaces, and forming the grooves on both surfaces of the blade portion so that air flows through grooves on both surfaces in a manner adjacent to each other. CONSTITUTION:Suction ports 9 and 10, exhaust ports 11 and 12 and a partitioning plate 14 of air currents 7 and 8 flowing into both surfaces of an impeller, separate the air currents 7 and 8. In this case, when the impeller is rotated around a rotary shaft 15, two kinds of air currents 7 and 8 sucked up in the vicinity of the center of both surfaces of the impeller flow in an adjacent manner through grooves 2a and 2b on both surfaces of the impeller portion. As a result, the air currents are subjected to heat exchange by the heat conduction of the blade portion 2, and thereafter sent out through exhaust ports 11 and 12. Thus, since air which has flowed into the grooves 2a and 2b on both surfaces of the blade portion 2, flows along the wall surfaces of grooves on both surface without generating a dead space, the heat exchange surface can be utilized effectively and the blast loss is small, thus the heat exchange is efficiently performed. |
