| 摘要 |
A ventilation door is provided to save energy by circulating indoor air with convection current owing to installing a ventilation passage in an entrance or a door, and to keep indoor air fresh by insulating sound and moisture. A ventilation door includes a first ventilation unit(10) installed between an indoor side plate(1a) and an outdoor side plate(1b) of a door(1) to communicate a first passage with a second passage(14) by a first connecting pipe(16), a second ventilation unit(20) divided by an insulation member(A) to communicate a third passage(22) with a fourth passage(24) by a second connecting pipe(26), air regulating members(30,30') installed in the first and fourth passages by a rib bar and provided with first through-holes(32) and shutoff plates(34) combined by a hinge(H) and opened or closed by an adjusting lever, and a grille(40) installed in the second and third passages by a fixing bar(41) and provided with second through-holes(42) and a filter(44). The first and fourth passages of the first and second ventilation units are communicated with the second and third passages by a radiating plate, and a heating member is installed in the radiating plate. |
