Motor-vehicle seat provided with a system for supplying conditioned air

In a motor-vehicle seat the padding body (1, 1') of the cushion and/or the backrest has a passage for the air coming from the air conditioning system (7) of the motor-vehicle. This passage comprises a closed cavity defined between a lowered surface formed in the outer surface of the padding body and the seat cover (3). The cavity (106) of the padding body (1, 1') is connected to the air conditioning system (7) of the motor-vehicle by means of an air supply line (9) which extends up to an outlet mouth (10) located above the motor-vehicle floor panel and arranged under the motor-vehicle seat. The outlet mouth (10) communicates with an air guiding line (4) carried by the seat, which extends from an inlet mouth (57) located under the seat to said cavity formed in the padding body. The outlet mouth (10) and the inlet mouth (57) are not mechanically connected with each other but are in fluid communication by means of an auxiliary connecting system (40, 41; 50) which maintains the communication in different adjustment positions of the seat relative to the floor panel, both along the longitudinal and the vertical directions. The auxiliary connecting system comprises a suction hood device (40) associated to the inlet mouth (57).