Cascade type shaftless electric fan

Abstract

The invention particularly relates to a cascade type shaftless electric fan which comprises a stator component, a rotor component and a driving device. The stator component comprises a mesh enclosure 2 and a shell 4, the shell 4 comprises an outer shell 41, a static cascade 42 and an inner shell 43 which are radially and sequentially arranged, the outer shell 41 and the inner shell 43 are fixedly connected by blades of the static cascade 42, the mesh enclosure 2 is arranged on an inlet side of the outer shell 41, the rotor component comprises a rotating wheel 3 and a gear 8, the rotating wheel 3 comprises an outer ring 31, a moving cascade 32 and an inner ring 33 which are radially and sequentially arranged, the outer ring 31 and the inner ring 33 are fixedly connected by blades of the moving cascade 32, the driving device drives the gear 8 to rotate, the gear 8 is engaged with the outer ring 31, the inner ring 33 is connected with the inner shell 43 through a bearing, and the runner center of the moving cascade 32 is overlapped with that of the static cascade 42. Air enters the moving cascade 32 from an inlet and then enters atmosphere through the static cascade 42, redundant flow passage components in the middle are omitted, runner design is reasonable, and energy conversion efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electric fans, in particular to a cascade-type shaftless electric fan. Background technique [0002] At present, the known bladeless fan has the advantages of more stable wind and soft wind force like natural wind. The mixing of high-energy fluid at the fan outlet and ambient low-energy fluid increases the air flow area in the direction of the outlet, making the incoming flow more uniform and larger. The area can be blown by the wind; but in comparison, the noise of the existing bladeless fan will be greater than that of the ordinary rotary blade fan when the air volume is large. The reasons are: 1. There are more noises from the inlet to the outlet. The design of flow parts and flow channels is unreasonable, and the energy conversion efficiency is low; 2. The diameter of the fan blade in the base is small. When a certain air volume must be guaranteed, the speed must be increased, resulting in increased n...

AI Technical Summary

Problems solved by technology

[0002] At present, the known bladeless fan has the advantages of more stable wind and soft wind force like natural wind. The mixing of high-energy fluid at the fan outlet and ambient low-energy fluid increases the air flow area in the direction of the outlet, making the incoming flow more uniform and larger. The area can be blown by the wind; but in comparison, the noise of the existing bladeless fan will be greater than that of the ordinary rotary blade fan when the air volume is large. The reasons are: 1. There are more noises from the inlet to the outlet. The design of flow parts and flow channels is unreasonable, and the energy conversion efficiency is low; 2. The diameter of the fan blade in the base is small. When a certain air volume must be guaranteed, the speed must be increased, resulting in increased noise; 3. In order to ensure a certain The wind speed of the bladeless fan is usually set to a gap of 1-2mm wide, and the flow rate of the outlet gas must be high. In addition, the mixing with the low-energy fluid in the environment will cause an increase in noise.

From an energy point of view, the air inlet and outlet of the bladeless fan increase the flow resistance compared with the traditional fan, and its energy conversion efficiency must not be as high as that of the traditional fan, that is to say, the power consumption of the same air volume is generated by the bladeless fan. The fan will be higher than the traditional fan

Images