Device for generating a temperature controlled air flow and appliance comprising said device

The air flow generator for a system with a mixing chamber (22) and air outlets (24, 26, 28) has at least one cold (18) and one hot (14) air duct, with a heating radiator (16) in the latter, and a distributor (38) for the main air flow (8) from the heater between the hot and cold air ducts. It incorporates at least one leak duct (64) permitting a cold air leak into the mixing chamber, with a regulator (66) to control its flow independently of the distributor. The regulator (66) is linked kinematically to the defrosting duct (24) shutter (32), and can be made in one piece with one of the heating/air conditioning shutters.