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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.

Active Publication Date: 2015-11-04
SHENZHEN DYMIND BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a small-sized low-noise centrifugal fan and a ventilator using the centrifugal fan, aiming to solve the problem of high noise of the existing ventilator

Method used

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  • Small low-noise centrifugal fan and breathing machine comprising same
  • Small low-noise centrifugal fan and breathing machine comprising same
  • Small low-noise centrifugal fan and breathing machine comprising same

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Embodiment Construction

[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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Abstract

The invention discloses a small low-noise centrifugal fan and a breathing machine comprising the same. The fan comprises a fan blade, an upper volute and a lower volute. A motor installation cavity is formed in the center of the lower volute and a brushless direct-current motor is installed in the motor installation cavity. A through hole is formed in the axis of the fan blade and used for locking a stretching shaft of the motor in a matched mode. The upper volute and the lower volute are assembled in a locked mode. The fan blade is composed of a plurality of arc-shaped short blade bodies, a plurality of arc-shaped long blade bodies and a lower disc. The number of the arc-shaped short blade bodies is equal to that of the arc-shaped long blade bodies. The arc-shaped short blade bodies and the arc-shaped long blade bodies are alternately arranged on the lower disc. The centrifugal fan has the advantages of being high in performance, low in noise, small in size, simple in structure, easy to manufacture and the like.

Description

technical field [0001] The invention relates to a ventilator, in particular to a ventilator equipped with a small-sized low-noise centrifugal blower. Background technique [0002] Household ventilators are usually used on the bedside at night, so the requirements for noise control are very high. The fan is the power-providing component in the ventilator, and it is also the main source of noise. Generally speaking, the larger the diameter of the blades of the fan, the more advantageous it is in terms of noise. However, considering the portability and aesthetics, household ventilators will develop in the direction of miniaturization in the future, leaving less and less space for the fan. Therefore, designing a new centrifugal fan with high performance, low noise and small size is the most fundamental means to solve the problem. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] The object of the present invention...

Claims

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Application Information

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IPC IPC(8): F04D29/30F04D29/42F04D29/66F04D25/08
Inventor 夏聪
Owner SHENZHEN DYMIND BIOTECH
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