3results about How to "Improve fan efficiency" patented technology

The present application relates to a kind of vane and impeller with the vane, vane includes vane body, the front end of the vane body is vane leading edge, rear end is vane trailing edge;The thickness of the vane body is gradually increased thick gradually decreasing from vane leading edge to vane trailing edge, and form a smooth vane body;The maximum camber position of the cross section of the vane body is located at 25%-75% of vane chord length.The vane of the present application can effectively save material and reduce noise by changing the maximum camber position of vane cross section and using front bending and rear sweep form.

The utility model provides a kind of pressure control device for longitudinal ventilation and smoke exhaust of rail transit tunnel, comprising: horizontal diffuser duct, one end of the horizontal diffuser duct is connected with the upper side portion of flow guide duct, another end of the horizontal diffuser duct is provided with interface three for intercommunication with external two-way reversible tunnel ventilator, compared with prior art, the utility model has the following two beneficial effects: by setting horizontal diffuser duct, flow guide duct, relying on the flow guiding and pressurizing effect of flow guide duct and adjustable angle nozzle, the air flow rate of tunnel along the driving direction can be effectively improved, the air leakage in the opposite direction of tunnel is reduced, the equipment size of tunnel ventilator and the civil engineering scale are reduced while providing equal air supply for fire section; by setting horizontal diffuser duct, electric air valve one, electric air valve two, simultaneously opening electric air valve one and electric air valve two, the fan efficiency and exhaust capacity of tunnel ventilator are significantly improved.

The utility model relates to a combined structure of a water-cooling row and a fan. The combined structure comprises the water-cooling row and an axial flow fan set. The water-cooling row comprises a frame shell, a plurality of water-cooling pipes and a plurality of water-cooling fins, wherein the water-cooling pipes and the water-cooling fins are combined in the frame shell. And the plurality of water cooling fins are arranged among the plurality of water cooling pipes at intervals. The axial flow fan group comprises an axial flow impeller and a bearing seat combined with the axial flow impeller, and the bearing seat is positioned in the frame shell and is adjacent to at least one water cooling pipe; therefore, the efficiency of the fan and the heat dissipation efficiency of the water-cooling bar are improved.