| 摘要 |
PURPOSE:To provide a ventilating device equipped with a filter having high efficiency of collection of oil with low pressure loss which is easily washed and uninflammable, by forming a filter with a metal plate having a large number of small openings thereon, specifying the area of opening of a hole and the total ratio of opening as well. CONSTITUTION:A filter 15 held by a filter frame 14 is disposed in front of vanes 13. The filter 15 is composed of a punching metal in which the area of opening of a hole is under 3.15mm<2> and the total ratio of opening is 40-55%. Since the ratio of opening of the metal 16 is large, the filter 15 has a small pressure loss and provides a large flow rate, so that oil mist generated is efficiently led to the ventilating device, leading to the prevention of pollution of indoor air. Since the diameter of a hole is small, large oil particles are caught without fail, resulting in a high efficiency of collection. |
