Door with a built-in burner for a heating appliance

A door with a built-in burner for a heating appliance, which is provided on the internal face of the door with a gas burner and on the external face of the door with a system for feeding a combustible gas mixture to the burner, the door adapted to engage into the frame of a wall of the appliance, and to be removably attached to the frame, wherein the door includes a pair of metal sheets firmly attached to each other at their periphery, the outer metal sheet having in a central zone thereof an inlet opening for the arrival of said gas mixture while the inner metal sheet has in a central zone thereof an outlet opening coaxial with said inlet opening, to which is attached the burner, wherein both of the sheets are spaced apart from each other, making between them a space, inside which a deflector plate is fixedly mounted, wherein the deflector plate has the shape of a disc, the diameter of which is substantially greater than that of said inlet and outlet openings of said door, and that the deflector plate is mounted centered on the axis of these openings and perpendicular to the latter, and wherein the deflector plate consists of two slightly spaced apart parallel metal sheets, attached to each other at their periphery, the deflector plate thus being shaped and dimensioned so that the gas mixture flow penetrating into the appliance through said inlet opening is deflected towards the outside of the deflector plate, circumvents the peripheral edge thereof from the outside towards the inside, and then flows onto the internal face of the deflector plate, in order to flow out through said outlet opening and penetrate into the burner.