Small low-noise centrifugal fan and breathing machine comprising same
A centrifugal fan and low-noise technology, applied in the field of ventilators, can solve problems such as high noise of ventilators, and achieve the effects of reducing noise, reducing energy loss, and facilitating mass production.
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[0021] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
[0022] Such as figure 1 As shown, the small low-noise centrifugal fan provided by the present invention, which can be used for ventilators, includes a fan blade 1 , an upper volute 2 and a lower volute 3 . A motor installation cavity 5 is provided at the center of the lower volute 3, in which a DC brushless motor is installed and fixed by screw locking. A through hole 4 is provided on the shaft center of the fan blade 1, and the through hole 4 is used for locking with the protruding shaft of the motor through interference fit. The upper volute 2 and the lower volute 3 are positioned and fastened through the slot, and then assembled by screw locking.
[0023] Such as figure 2 and image 3 As shown, the small centrifugal fan involved ...
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