Unpowered controllable ventilator

Abstract

The invention provides an unpowered controllable ventilator comprising an impeller set, a fixed shaft and a support. The impeller set is composed of arc blades and provided with an upper connecting ring and a lower connecting ring. The upper connecting ring is movably connected with the fixed shaft through a bearing. The outside of the upper connecting ring is provided with a circular cover plate. The lower connecting ring is connected with a first cross connection rack. The center of the first cross connection rack is provided with another bearing which is movably connected with the fixed shaft. The distance between the upper connecting ring and the fixed shaft is smaller than that between the lower connecting ring and the fixed shaft. A second cross connection rack arranged at the bottom of the fixed shaft is movably connected with the top of the support. The bottom of the support is provided with a conical ring with large bottom and small top. The top of the conical ring is provided with a seal chamber; the wall or surface of the seal chamber is in a shutter structure. The unpowered controllable ventilator has the advantages that ventilation speed can be increased, rain in the ventilator and condensate generated by the ventilator can be collected effectively and are treated through a water outlet and a drain outlet, ventilation is controlled effectively and can be adjusted as required, and startup wind force is under the light breeze.

Description

technical field [0001] The invention relates to a non-powered ventilation device, in particular to a non-powered controllable ventilator. Background technique [0002] The unpowered fan is a kind of fan that uses the principle of natural air convection, uses the "heat pressure" generated by the temperature difference between indoor and outdoor air and the "wind pressure" generated by the effect of outdoor wind, to improve the effect of indoor ventilation. It has been very popular in western European and American countries for decades. In China, with the advent of a large number of steel structure buildings, the installation and use of non-powered fans is also increasing. It does not use electricity, has no noise, and can run for a long time. , remove indoor heat, humidity and odors. [0003] Generally, unpowered fans use curved blades to form a spherical impeller. Due to authoritative research in this field in the United States, such as the conclusion of 32 blades with the ...

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Problems solved by technology

[0004] However, in the specific use process, it was found that all the non-powered fans have uncontrollable ventilation volume, and they all work at the maximum air volume. The rainproof function is limited, and they can effectively prevent rain when the rainfall is small or the rainfall time is short. During heavy and prolonged rainfall, there will be rainwater dripping into the

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