2results about How to "Optimized airflow organization" patented technology

The utility model relates to a low-wind-noise wind wheel structure, a fan assembly and a dehumidifier, a wind wheel comprises a support, the support comprises a hub, a mounting part and a flow guide part connected between the hub and the mounting part, the flow guide part and the mounting part are both located on the air inlet side of the wind wheel, the flow guide part is in a hollow circular truncated cone shape, and a containing cavity for at least containing part of a motor is defined by the flow guide part; the mounting part is used for mounting a driving shaft of the motor; and the inner ends of the blades are connected to the circumferential outer surface of the hub. According to the low-wind-noise wind wheel structure, the fan assembly and the dehumidifier, the flow guide part with the specific through-flow opening is arranged in the wind wheel, airflow organization in the wind wheel is optimized, airflow is more regular and smoother when entering the containing cavity and acting with the blades, and pneumatic noise is effectively reduced while the air volume is increased; meanwhile, the motor can be partially wrapped by the containing cavity formed by the flow guide part, and leakage of noise of the motor is reduced.

This invention discloses a hot gas recirculation hood and a heavy-duty UAV using the hood, relating to the field of UAV technology. The proposed solution includes a hot gas recirculation hood comprising: a shell for covering the outside of a fuel cell system stack, with the interior of the shell forming an annular circulating air duct with the fuel cell system stack; a rectifier for discharging waste heat gas generated by the fuel cell system stack to the outside of the shell; a spoiler hood disposed downstream of the exhaust path of the rectifier hood for changing the exhaust direction of the waste heat gas; and an active recirculation component movably disposed on the shell, having a waste gas capture section opposite to the spoiler hood. The movement of the active recirculation component is configured to synchronously adjust the proportion of waste gas recirculated back into the shell via the waste gas capture section, and the flow rate of fresh air entering the shell via the shell, thereby achieving regulation of the working microenvironment of the fuel cell system stack.