| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ventilation hood capable of preventing foreign matter including dust and insects from entering a room, and also capable of preventing entry of rain water into the room. <P>SOLUTION: The ventilation hood A for ventilating an indoor air with an outdoor air includes: a cylindrical air inlet 1 protruding from the building side to the outside; a spiral passage 2 arranged to enclose the front and outer periphery of the air inlet 1; an air outlet 3 arranged adjacently to the spiral passage; and an outside air intake port 4 and the air outlet 5 connected with the air outlet 3 that can exhaust the foreign matter entering the spiral passage 2 and opened to an outside air at the spiral passage 2. <P>COPYRIGHT: (C)2013,JPO&INPIT |
