A fixed blade type low wind resistance windpipe rain cover
A technology for fixing blades and blades, applied in the directions of heating and ventilation hoods/covers, etc., can solve the problems of complex rain hood structure, increased wind resistance of air duct outlet, and high use cost, and achieves simple overall structure, large outlet area, The effect of enhancing stability
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[0011] Such as figure 1 As shown, a fixed blade type low wind resistance air duct rain cover of the present invention includes a bracket 1, and the bracket 1 is installed in the middle part of the inner side of the air duct 4, such as figure 1 with figure 2 As shown, a circular top cover 5 is installed above the bracket 1, and several same fan-shaped blades 2 are evenly installed on the top cover 5. Such as figure 1 As shown, the blade 2 is arranged obliquely downward from its root to the outer edge, and at the same time, as figure 2 As shown, the fan surface of the blade 2 rotates along its axis of symmetry and tilts at a certain angle, and the angle of inclination is less than 45°, and as figure 2 with image 3 As shown, the edge of the blade 2 on the lower side is turned up to form a drainage groove 6 . The projections of adjacent blades 2 in the vertical direction partially overlap to ensure that the higher side of the blade 2 can cover the lower side of its adjace...
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