Diffusion terminal of clean air provided with double emission, and corresponding air exchange system

A diffusion terminal of clean air, provided for improving the quality of the air breathed by a person,

• said diffusion terminal comprising:
• an outer body, which is configured to be connected to an outlet of a respective supply channel of clean air,
• said outer body-having an outlet mouth provided for supplying clean air towards an inhalation area of a person,
• a first conical element at least partially hollow arranged inside the outer body, in such a way that an axis of the first conical element is substantially coincident with a main axis of the body,
• said first conical element having a base portion arranged close to a plane defined by the outlet mouth of the outer body, so as to provide an outlet of an airflow along a crown defined between an inner surface of the outer body and an outer surface of the first conical element,
• said first conical element comprises at least one opening to enable passing of an airflow within the first conical element and through an outlet mouth of the first conical element,
• in such a way that the clean air supplied by means of the diffusion terminal is realized with an airflow passing through said crown and another central airflow passing through the first conical element,
• wherein said first conical element is tapered proceeding away from the outlet mouth of the outer body, creating a cavity with a shape converging towards the outlet mouth of the outer body, defined by the inner surface of the outer body and by the outer surface of the first conical element, in such a way that the air emitted by said crown, before leaving the crown, crosses a cavity with a shape converging towards the outlet along the crown.