| 摘要 |
PURPOSE:To furnish the weather cover of a ventilating system, which can be installed at the end part of a double tube duct consisting of two ducts with different diameters, one of which is put in the other. CONSTITUTION:An outside cover main body 4 is installed so as to cover the end part of a double tube duct 1 consisting of an intake duct 2 and an exhaust duct 3, both the bores of which are different from each other and one of which is put in the other. The foul air sent through the exhaust duct 3 is discharged from an exhaust port 5. On the contrary, the fresh air is introduced from suction ports 6 and supplied through the intake duct 2 into a room (not shown). When a steel plate double tube duct is employed for the use at the site with heat of fire, the employment of the outside cover main body 4 and a partition plate 8 made of heat-resistant material makes the conditions more safe. |
