VEHICULAR AIR CONDITIONER

PROBLEM TO BE SOLVED: To provide a vehicular air conditioner for restraining a hitting sound in sealing, without complicating a structure and reducing durability-reliability of the seal function. SOLUTION: This vehicular air conditioner U switches blowout modes by opening and closing, by using mode doors 14, 11 and 6 of rotating with rotary shafts 17d, 17v and 17f as the center, air-conditioning air blowout ports 15, 12, 9 and 13 formed in an air-conditioning case 1 therefor, and the air conditiner is provided with a silent sound seal structure for gradually reducing the blowout ports by gradually increasing the contact area of a seal part in response to an increase in a closing degree of the mode doors by setting of at least one shape among door side seal parts 16d, 16v and 16f and case side seal parts 1d, 1v and 1f in the mode doors, and minimizes the residual area of not mutually contacting both seal parts just before fully closing the blowout ports of maximizing a relative speed of the door side seal parts and the case side seal parts. COPYRIGHT: (C)2009,JPO&INPIT