| 摘要 |
A hot air flap controls the cross-section of the mouth of the hot air channel and a cold air flap controls the mouth cross-section of the cold air channel. Air conducting cover surfaces (20,21), working in conjunction with the cold air flap (17), are formed on the mouth (121) of the cold air channel (12). The formation of the cover surfaces is such that the cold air flap frees the mouth of the cold air channel over a predetermined first area of the pivot path. It moves it from its closed position with a continually growing opening cross-section only over a part of the mouth width and over a second area of the pivot path with a continually growing opening cross-section in the entire width of its mouth.
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