Abstract: The purpose of the invention is a treatment device fitting in a filter, particularly a particle filter (1) or a combined filter of a heating, ventilation and/or air conditioning installation for a vehicle cabin, to prevent the development of microorganisms on the surfaces of such an installation. This device is composed mainly of a permeable container (6) for a volatile treatment agent, and comprises means for attachment of the container (6) to the filter (1) between the folds of the filter structure (3) making up the filter, so that the container (6) can be installed on any filter (1) in an existing installation to prevent the development of microorganisms on the surfaces of such an installation.

Abstract: The subject of the invention is a heating, ventilation and/or air-conditioning unit, especially for a vehicle, which is equipped with means for treating the air by diffusion of a volatile agent. This unit comprises a wall (2) bounding an air circuit (8), this wall (2) having an opening (7) therethrough for the passage of a treatment cartridge (1). A permeable partition (10) defines a diffusion chamber (11) for the volatile agent, this partition (10) being placed in the internal volume of the air circuit (8).

Abstract: The invention relates to an air treatment device 1 using a volatile agent contained inside a casing 2 that is at least partially permeable, characterized in that it includes means 4 for activating the emission of the volatile agent. These means are advantageously constituted by a film, a strip, a cord or a percussor. Application in motor vehicles.

Abstract: The invention relates to an air treatment device using a volatile treating agent contained inside a permeable container (1), particularly applicable to a ventilating, heating and/or air conditioning installation. The treating agent is a liquid packaged inside a cohesive spongy body (2) occupying the available volume of a chamber (3) formed by an internal hollow of the container (1).