Air volume adjustable draught fan based on fan blade angle adjusting
A fan blade and air volume technology, which is applied in the field of adjustable air volume fans, can solve the problems of increasing cost burden, reducing the effective utilization rate of the machine, and the blade angle cannot be adjusted, and achieves the effect of simple angle adjustment.
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[0019] Examples, see e.g. Figure 1 to Figure 4 As shown, a fan with adjustable air volume based on adjusting the blade angle includes a housing 11, a motor 12 is fixed inside the housing 11, an impeller 2 is fixed on the motor shaft of the motor 12, and the impeller 2 is connected by a connecting piece 4. A fan blade 3, the impeller 2 is formed with a left open cavity 21, a plurality of circumferentially evenly distributed bosses 22 are formed on the outer wall of the impeller 2, and the bosses 22 are formed with a cavity that is large on the outside and small on the inside. 21 communicates with a conical hole 23; the fan blade 3 includes a blade 31, the inner end of the blade 31 is fixed with a conical frustum 32 with a large outside and a small inside, and a stepped hole 33 with a large outside and a small inside is formed on the frustum 32. The taper 32 is inserted into the taper hole 23; the connector 4 includes a base 41 arranged in the cavity 21, the base 41 is formed w...
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