Cooling device for a turbomachine supplied by a discharge circuit

A method for controlling at least one device for cooling at least one unit of a turbine engine, comprising a heat exchanger, an air outlet of which is connected to an ejector of the jet pump type, which comprises a feed-through duct for a secondary airflow coming from said air outlet, as well as a nozzle for spraying a primary airflow inside said feed-through duct, the method comprising the steps of:

• feeding the spray nozzle, during which the spray nozzle is fed with a bleed airflow originating from a bleed system of a compressor of the turbine engine, said bleed system being designed to discharge a bleed airflow at reduced flows, so as to allow a pressure to be dropped downstream of the compressor in order to prevent any blowback and to avoid any pumping phenomena in said compressor, and said bleed system being connected to a bleed duct placed downstream the compressor it bleeds, and connected to said compressor by at least one valve;
• and
• cutting off the feed to the spray nozzle.