| 摘要 |
PURPOSE: A cylindrical door of an air conditioning system for a vehicle is provided to reduce operation force demanded in moving a rotary door by limiting a part contacting the rotary door with a door cover by a seal and installing a friction reducing member. CONSTITUTION: A cylindrical door installed movably in an air conditioner case to regulate an opening area of plural blowing opening units(3,4,5) comprises a rotary door(20) rotated to form an opening unit(22) communicating with the blowing opening units and a door cover(21) fixed in the case with covering the rotary door and composed of an opening unit communicating with the blowing opening units, a seal(26) stuck on a surface contacting with the rotary door to prevent air-leakage, and a friction reducing member(27) attached on the upper part of the seal.
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