Method and device for air circulation switching in vehicle air conditioners

A section (10) of an air-guiding channel has sectional air channels (12,14,16). A first sectional air channel (12) ends in an opening through which external air (A) is sucked in and fed into a central air channel (16). A second sectional air channel (14) ends in an opening through which internal air is sucked in and fed also into the central air channel. A ventilating flap (18) can block the first sectional air channel to adjust the circulating-air operation. An Independent claim is also included for a device for carrying out the present invention.