| 摘要 |
<p>The invention relates to air diverters for use in ventilation systems, and in particular to diverters provided with a 'fail-safe' configuration. Embodiments disclosed include an air diverter valve (200) for a ventilation system, the air diverter valve comprising: a frame (201) having first and second openings (202, 203) and a longitudinal axis (204); a shutter (205) mounted to the frame for rotation about the longitudinal axis and having a convex cylindrical outer surface (206), the shutter being rotatable from a first position in which the outer surface covers the first opening to restrict air flow therethrough towards a second position where the first opening is uncovered to allow air flow between the first and second openings; and a rotary actuator (207) configured to rotate the shutter between the first and second positions, wherein the shutter is biased towards the first position such that, in use, de-activation of the actuator causes the shutter to return to, or remain in, the first position.</p> |
