Natural smoke exhaust device under strengthening action of Venturi effect

Abstract

The invention discloses a natural smoke exhaust device under the strengthening action of the Venturi effect. The natural smoke exhaust device comprises a cover plate arranged on the upper portion of anatural smoke exhaust opening. A Venturi strengthening flow-guiding face protruding downwards and located on the upper portion of the natural smoke exhaust opening is arranged on the bottom face of the cover plate. Profiles, cut by any horizontal plane, of the Venturi strengthening flow-guiding face are circles with the circle centers being located on the same vertical straight line; and as for any two of the horizontal planes intersecting with the Venturi strengthening flow-guiding face, the diameter of the profile, cut on the Venturi strengthening flow-guiding face, of the horizontal planelocated on the upper portion is larger than the diameter of the profile, cut on the Venturi strengthening flow-guiding face, of the horizontal plane located on the lower portion. According to the natural smoke exhaust device under the strengthening action of the Venturi effect, the natural smoke exhaust efficiency under the condition of environment wind can be improved, the failure of natural smoke exhaust is avoided, the natural smoke exhaust device can adapt to the environment wind in all directions, and natural smoke exhaust under the condition of the environment wind is strengthened to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of smoke exhaust systems, in particular to a natural smoke exhaust device under the strengthening of the Venturi effect. Background technique [0002] The natural smoke exhaust system is widely used in public buildings with large spaces due to its easy installation and cost savings. The principle of natural smoke exhaust is to use the thermal pressure caused by the temperature difference between indoor and outdoor and the wind pressure caused by the outdoor wind to form the convective movement of indoor smoke and outdoor air. Natural smoke exhaust does not require electricity, which can not only save energy, but also It is not affected by power interruption caused by fire, so as long as the design is reasonable, its reliability can be well guaranteed in a fire. [0003] Natural smoke exhaust windows are widely used in industrial buildings, commercial buildings and residential buildings due to their convenie...

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Problems solved by technology

[0008] In view of this, the purpose of the present invention is to provide a natural smoke exhaust device under the strengthening of the Venturi effect, which can solve the natural smoke exhaust efficiency under ambient wind conditions, and avoid the failure of natural smoke exhaust, and can adapt to all directions. Ambient wind, to a certain extent, strengthen the natural smoke exhaust under ambient wind conditions

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