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    • 8. 发明申请
    • Roof-mounted suction ventilator
    • US20180119969A1
    • 2018-05-03
    • US15732337
    • 2017-10-26
    • Jason LinJianfang Lin
    • Jason LinJianfang Lin
    • F24F7/02B60H1/24
    • F24F7/02B60H1/248B60H1/262
    • This invention provides a natural ventilator that is free of moving parts, wind-activated, rain-proof, and not only suitable to be a standalone natural ventilator but also advantageous to be used as an enhanced exhaust exit in a forced-air ventilation system. It can also be used as a suction generator that supplies so-called suction or negative pressure to help stabilize such building components as roof membranes by channeling the low pressure to its underneath to balance the wind uplift above.The ventilator includes a hollow base body to be secured onto an exterior surface of such enclosed objects as a building or vehicle and having a convex upper face, and a hollow raised body being supported and secured on the base body with elongated hollow members and having a convex lower face towards the base body. The elongated hollow members establish conduits that channel the internal spaces of the hollow base and raised bodies. A free space is formed between the convex faces of the base and raised bodies. Each of the said convex faces has an opening, at or near their centers and substantially facing each other. The said convex faces of the base and raised bodies are configured in such a way that the free space between the convex faces is generally narrower near the openings than away from them. This forms a first contracting and then expanding path for airflow to approach from any direction and to pass through the free space between the said convex faces, providing a venturi mechanism. The device thus creates low pressure in the free space near the openings and hence a suction effect therein, which can be readily communicated to any interior space of a building or vehicle needing air relief or suction and to be properly connected with the hollow base body.A series of enhanced rainwater-proof designs are illustrated to exemplify methods of defending the system against rainwater invasion, even if raindrop trajectory becomes highly oblique from vertical as driven by strong winds.