Aircraft hot-air supply system

A hot-air supply system for an aircraft equipped with at least one engine (2) with a fan (3) and compressors (4), comprising:

• a first pipe (10) which bleeds pressurized hot air off said compressors (4) and on which there are mounted a flow-regulating valve (14) and a pressure-regulating valve (15), said valves respectively comprising a controlled member (14A or 15A) capable of controlling the passage of hot air through said first pipe;
• a second pipe (11), which bleeds pressurized cold air off said fan (3) and on which is mounted a flow-regulating valve (16), said valve comprising a controlled member (16A) capable of controlling the passage of cold air through said second pipe;
• a pre-cooling heat exchanger (12) to which said first and second pipes (10 and 11) are connected;
• an air-temperature detector (28), placed at the outlet from said heat exchanger (12);
• an air-pressure detector (27), placed on said first hot-air bleed pipe (10);
• a control device (24) receiving electrical signals representing measurements from said temperature detector (28) and from said pressure detector (27) and controlling said hot-air flow-regulating valve (14),
• wherein:
• said hot-air flow-regulating valve (14), said hot-air pressure-regulating valve (15) and said cold-air flow-regulating valve (16) each comprise a control unit (14B, 15C, 16C) capable of controlling the corresponding controlled member (14A, 15A, 16A);
• each of said control units (14B, 15C, 16C) comprises electrically controlled means capable of bleeding pressurized air from said first and second pipes (10, 11) to actuate said corresponding controlled member (14A, 1SA, 16A) pneumatically;
• and
• said control device (24), in addition to controlling said hot-air flow-regulating valve (14) controls said hot-air pressure-regulating valve (15) and said cold-air flow-regulating valve (16), thus providing said system with centralized management.