11results about How to "Improve fan efficiency" patented technology

The invention relates to a split type sterile spraying drug delivery device which comprises a gun body assembly and a drug bin system, and the gun body assembly and the drug bin system are detachably connected. The gun body assembly comprises a shell, a material extruding mechanism, a gas generating assembly, a wind power adjusting device and a trigger assembly. The medicine bin system comprises a medicine bin and an injector. The medicine bin can be independently detached to be sterilized or replaced, and the sterility of clinical application is ensured.

The invention relates to an efficient fan and a manufacturing method thereof, and relates to the technical field of fans, the efficient fan comprises a machine shell, an upper shell and a lower shell of the machine shell are connected through bolts, field installation and client field maintenance are facilitated, a main shaft penetrates through the center position of the machine shell, independent bearing seats are arranged at the two ends of the main shaft, and the main shaft is turned into a stepped hierarchical structure. The impeller is detachably installed on the main shaft and fixed in an abutting mode through the fixing ring and can be replaced, stress generated in the operation process of the impeller is transmitted to the stepped grading structure of the main shaft through the fixing ring, and the impeller is prevented from slipping off and deforming. A backflow device is arranged outside the impeller, the size and shape of the backflow device are optimized through pneumatic calculation, and the casting can be closer to the size of pneumatic design; a backflow channel is arranged in the backflow device and communicated with the air inlet machine shell and the exhaust volute which are welded to the machine shell, the overall weight of the draught fan is reduced, and meanwhile the using requirement under the complex environment is met.

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 present application relates to the technical field of air conditioning equipment, and in particular, to an axial flow fan, an axial flow fan and an air conditioning equipment. The axial flow fan includes a hub rotating around a central axis and blades extending radially outward from the hub and arranged around the central axis. A guide surface is formed on the side of the hub between the suction surface of the first blade and the pressure surface of the second blade adjacent to the first blade. The guide surface is a curved surface surrounded by a first curve AB, a second curve BC, a third curve CD and a fourth curve DA. The second curve BC is located on the front end surface of the hub, the fourth curve DA is close to the inner edge of the first blade, the endpoints A and B are located in front of the front end point of the inner edge of the first blade, and the endpoints C and D are located at the rear of the front end point of the inner edge of the first blade and in front of the front end point of the inner edge of the second blade. The axial flow fan blade is applied to the axial flow fan, which improves the fan efficiency and reduces turbulence and aerodynamic noise.

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 present invention discloses a high-efficiency, large-air-volume centrifugal induced fan, comprising a casing, a volute is provided in the casing, the volute is provided with an air inlet and an air outlet channel that are interconnected, a collector is provided at the air inlet, an impeller is provided in the volute, a motor for driving the impeller to rotate is installed in the casing, the volute adopts a semi-volute structure, the volute is provided with a multi-volute tongue flow guide component, and the air outlet channel of the volute is connected with a nozzle with adjustable wind direction. The present invention uses a semi-volute structure with a multi-volute tongue flow guide component to evenly separate the outlet cross-section of the fan volute, reduce airflow disturbance, and improve the efficiency of the fan. An adjustable guide vane structure is provided at the air outlet, and the induction effects such as induced air volume, ejection distance, and coverage area are improved by adjusting the deflection angle of the double-layer guide vane. The present invention has high efficiency, large coverage area, and small space occupied by equipment installation.

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.

This invention discloses a composite high-efficiency, low-noise three-dimensional impeller with backward-curved blades. The impeller employs a composite structure combining double-layer and single-layer blades. The first blade is a backward-curved twisted blade, the second blade is a forward-curved twisted blade, and the third blade is a radial blade. This design effectively improves the flow pattern of the fluid within the flow channel, reducing noise. The third blade has a bent portion protruding inwards from the first and second outlet blades near the outlet side. The flow area is minimized at the bent portion, and maximized at the radially outer outlet of the third blade. This structural design more effectively boosts pressure and improves the efficiency of the fan operation.

The invention discloses a cabinet air conditioner based on a simple centrifugal air duct, which comprises a cabinet air conditioner shell, the centrifugal air duct arranged in the cabinet air conditioner shell and a centrifugal fan arranged in the centrifugal air duct, the centrifugal fan is a volute-free centrifugal fan, and the position of a minimum gap between the inner side wall of the centrifugal air duct and the centrifugal fan is limited as a point A; a connecting line between the point A and a fan rotating shaft of the centrifugal fan is arranged in the horizontal direction and is positioned in the width direction of the cabinet machine shell; compared with the prior art, the centrifugal fan is designed to be a volute-free centrifugal fan, some supporting pieces in the centrifugal fan are removed, and simplicity of the centrifugal air duct is embodied; and the connecting line between the point A and the fan rotating shaft of the centrifugal fan is limited to be arranged in the horizontal direction and located in the width direction of the cabinet machine shell, so that the diameter of a wind wheel of the centrifugal fan can be designed to be maximum under the condition that the width of the cabinet machine shell is not changed, and the fan efficiency and the noise effect are improved.

The present invention provides a mounting plate structure, an air duct structure and an indoor unit of an air conditioner, wherein at least part of the mounting plate structure is located in the air duct, and the mounting plate structure comprises: a mounting plate body, on which a mounting portion for mounting a driving device is provided, and the mounting portion is located in the air duct; a guide portion, connected to the mounting portion, and having a guide surface, so as to guide the airflow toward the center line of the air duct through the guide surface; or to guide the airflow away from the center line of the air duct through the guide surface; and a first-stage guide vane, wherein the first-stage guide vane is provided on the guide portion, and the first-stage guide vane is located in the air duct, so as to rectify the airflow in the air duct through the first-stage guide vane. The mounting plate structure of the present invention solves the problem that the air duct structure in the prior art has a small air volume and a large energy loss.

The invention provides a mine main ventilator structure arranged in an underground ventilation system, and relates to the technical field of mine ventilation equipment.The mine main ventilator structure comprises a fan outer barrel and a fan room, an air door is arranged at the air inlet end of the fan outer barrel, and a brake and a grounding control box are fixedly installed in the fan room; an air inlet and an air outlet of the fan outer barrel both extend to the outside of the fan room, the fan outer barrel and the fan room are connected in a sealed mode, a fan inner barrel is fixedly installed in the fan outer barrel through a connecting part, a motor is fixedly installed in the fan inner barrel, and an air duct is arranged between the fan inner barrel and the fan outer barrel. The fan main body is arranged in the fan room, and the inlet and the outlet of the fan main body are connected with the ventilation pipelines in front of and behind the fan room, so that underground waste gas is prevented from leaking into the fan room, the fan room is always clean, and workers can conveniently enter the fan room at any time to inspect and maintain the fan and auxiliary facilities of the fan.