TONGUE-AND-GROOVE COUPLING BETWEEN PANELS OF SELF-SUPPORTING AIR-CONDITIONING DUCTS

摘要

The invention relates to a tongue-and-groove coupling between panels of self-supporting airconditioning ducts and the like, of the type that is provided in order to establish an optimum fit of the canted edge corresponding to the panels that are coupled in a tongue-and-groove manner, and also to avoid the air coming into contact with the core of the duct therein. To this end, the panels consist of a core of insulating material complemented by all outer and inner layers based on aluminium o other coating, the juxtaposing canted edge or edge between the panels having an oblique eut in relation to the horizontality or longitudinal intermediate line in the join between the two panels; extending the aluminium layer or coating, which determines the inner face of the duct, past the edge of the panel, taking into account the oblique surface that defines the coupling profile.