| 摘要 |
PURPOSE:To miniaturize the ventilating device and improve ventilating and heat exchanging performance by a mechanism wherein oblique cut portions are formed to the one portions of spiral portions while opposing the cut portions to the discharge sides of ducts. CONSTITUTION:Oblique cut portions 30 are mounted to the spiral portions of a feed duct 5 and an exhaust duct 7. the cut portions 30 are installed at the sides facing to discharge ports 27. At the element side, the discharge port 27 of a feed current A is brought near to the center side of a case 1, and the current flows to an element, and an exhaust current B is also brought near to the center side of the case 1, bends from the element are decreased, and the current B flows to suction port 29 of the exhaust duct 7. Thus, both air currents A, B are brought near to the center, and effectively made function from a standpoint of area, heat exchanging efficiency is promoted while the both air currents A, B flow at the outdoor side in the directions that the currents separate, the mixing of air is lessened, and ventilating effect is improved. |
