Car air conditioning system

A car air conditioning system comprising a pneumatic circuit (2) configured to feed an air flow into a passenger compartment (3) of a vehicle;

• and a cooling circuit (4) to cool the air flow fed along the pneumatic circuit (2);
• the pneumatic circuit (2) comprising at least one feeding branch (10) comprising, in turn, a first pneumatic duct (11), a second pneumatic duct (12) and a three-way joint (14), wherein the pneumatic circuit (2) further includes an inlet (16) connected to the first pneumatic duct (11), a first outlet (17) connected to the second pneumatic duct (12), a second outlet (18) configured to communicate with the passenger compartment (3) of the vehicle, and a shutter (19), which is movable within the three-way joint (14) from and to a closing position for the inlet (16), wherein the inlet (16) is separate from the two outlets (17, 18),
• wherein the three-way joint (14) comprises a valve body (15) with a cylindrical shape provided with the inlet (16) and with the two outlets (17, 18);
• the shutter (19) being mounted within the valve body (15) so as to rotate around a longitudinal axis (20) of the valve body (15),
• wherein the shutter (19) comprises a rocker arm (21) provided with a first arm (22a) and with a second arm (22b), each delimited by a respective end edge (23), which is parallel to the longitudinal axis (20) of the valve body (15) and cooperates with an inner surface (24) of the valve body (15), and
• wherein the shutter (19) is movable to a plurality of fourth opening positions, in which the first arm (22a) prevents the refrigerated air flow fed through the inlet (16) from reaching the second outlet (18), the second arm (22b) directs the refrigerated air flow fed through the inlet (16) towards the first outlet (17) and the shutter (19) selectively controls the refrigerated air flow rate fed through the first outlet (17).