Aircraft air inlet comprising at least two walls connected end to end by welding, method for the assembly of such an air inlet, and aircraft comprising at least one such air inlet

An air inlet of a nacelle of an aircraft comprising:

• a lip having outer and inner faces and a leading edge configured to split an air flow into an interior air flow and an exterior air flow, the interior air flow entering the air inlet, the exterior air flow being laminar over a length of the nacelle from an aerodynamic stagnation point at the leading edge of the lip extending aft along the outer face of the lip during operation of an aircraft engine,
• an exterior panel having an outer face against which the exterior air flow flows in operation, an inner face opposite to the outer face and a front edge oriented towards the lip,
• a front frame, in the form of a ring, which has exterior and interior edges, and,
• an intermediate panel, interposed between the lip and the exterior panel, having an outer face against which the exterior air flow flows in operation, an inner face opposite to the outer face, a first edge connected to the lip by at least a first connection and a second edge connected to the exterior panel by at least a second connection, and
• a third connection connecting an exterior edge of the front frame to the lip,
• wherein the first connection connecting the first edge of the intermediate panel and the lip comprises at least a first butt weld bead having an outer face in an extension of the outer faces of the lip and of the intermediate panel,
• wherein the third connection is positioned between the leading edge and the first connection.