System for deicing an air inlet cowl for a turbine engine

1. A system for deicing a hollow leading edge of an air inlet cowl of an aircraft turbine engine said deicing system comprising:

an injector designed to inject pressurized hot air inside said hollow leading edge;

a hot air intake mounted on a hot-stream generator of said turbine engine;

a hot-air circulation circuit for conveying said pressurized hot air from said hot air intake to said injector, said hot-air circulation circuit forming a right-angled structure comprised of a transverse branch rigidly connected to said hot air intake, and a longitudinal branch arranged laterally with respect to said turbine engine and whose end is connected to said injector;

a fastening unit arranged in the region of said injector for fastening said longitudinal branch to said air inlet cowl; and

a sealed articulation device comprised of two mutually secured swivels mounted on at least one of said transverse branch and said longitudinal branch of said hot-air circulation circuit to provide said right-angled structure with capabilities of deforming about said articulation device; and

an external protective casing surrounding said transverse branch and provided with a conjoint articulation device arranged and produced in correspondence with said sealed articulation device.

2. The deicing system as claimed in claim 1 , wherein the external protective casing is removable.

3. The deicing system as claimed in claim 1 , wherein at least one of the swivels is a detachable joint type swivel.

4. The deicing system as claimed in claim 3 , wherein, in each detachable joint type swivel, said swivel cooperates with a cylindrical surface.

5. The deicing system as claimed in claim 1 , wherein the swivels are mounted on the transverse branch of said hot-air circulation circuit.

6. The deicing system as claimed claim 1 , wherein:

said longitudinal branch of the hot-air circulation circuit is constituted by an internal hot-air-ducting element and by an external surrounding said two constituent elements of said branch is longitudinally rigid, other of said constituent elements least two parts which are nested one inside the other and which are capable of sliding with respect to one another in a sealed manner;

the two constituent elements of said longitudinal branch are secured to one another at their two ends;

in the region of said injector, the two constituent elements are rigidly connected in common to said fastening unit; and

in the region of said transverse branch, on the one hand, said internal hot-air-ducting elements of said longitudinal and transverse branches are secured to one another and, on the other hand, said external protective casing elements of said longitudinal and transverse branches are likewise secured to one another.

7. The deicing system as claimed in claim 1 , wherein:

said longitudinal branch of the hot-air circulation circuit comprises at least two sections mounted one at the end of the other;

each of said sections is constituted by an internal hot-air-ducting element and by an external protective casing element surrounding said internal element;

one of the constituent elements of each of said sections is longitudinally rigid, whereas the other of said constituent elements comprises at least two parts which are nested one inside the other and which are capable of sliding with respect to one another in a sealed manner;

the two constituent elements of each of said sections are secured to one another at their two ends;

the two sections of said longitudinal branch are joined together so as to connect their constituent elements, respectively;

in the region of said injector, the two constituent elements of one of the two sections are rigidly connected in common to said fastening unit; and

in the region of said transverse branch, on the one hand, said internal hot-air-ducting elements of the other of said sections and of the transverse branch are secured to one another and, on the other hand, said external protective casing elements of said other section and of said transverse branch are likewise secured to one another.

8. The deicing system as claimed in claim 1 , wherein said fastening unit comprises a partition which closes off said hollow leading edge.