| 摘要 |
PURPOSE:To simplify construction in the vicinity of a blow out port and improve thermal efficiency by providing a heating body by electrification on a duct blow out port while giving an air heating function and an air deviating function to this heating body. CONSTITUTION:Plural number of vent holes 12a are opened on the cover grill 12 of a nozzle unit 11 which is provided on the blow out port of a defroster duct. On the inside of this cover grill 12 which is formed by an electrically insulating and heat resisting material, a row of PTC honeycomb 14 made of a BaTiO3 group semiconductor which can be heated by electrification and whose resisting value increases rapidly after reaching a certain temp., is provided. The row of honeycomb 14 is loosely fitted in, and supported by, conductive terminal frames 13, 15 which are fixed to a fixed duct 17. This row of honeycomb 14 consists of divided elements 21-23. On the divided elements 21, 22 on the both end sides, through holes 21a, 22a are provided being inclined at directed angles B, C in a direction perpendicular to top and bottom flat end surfaces, respectively. A through flow holes 23a is provided on the central divided element 23, perpendicular to the top and bottom flat end surfaces. |
