Low-noise fan for classroom

A low-noise, classroom-based technology, applied to parts of pumping devices for elastic fluids, non-variable pumps, pump devices, etc., can solve problems such as distraction, distracted students, and teachers affecting educational effects, etc., to achieve Reduce noise and increase the effect of blowing range

Inactive Publication Date: 2016-02-24
华蓥市双河第二初级中学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing school teaching is generally taught by the teacher orally. The sound of the fan turning too loud can easily drown out the teacher's voice so that the students can't hear it and affect the educational effect. Moreover, the sound of the fan turning can easily make the students distracted and distracted.

Method used

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  • Low-noise fan for classroom
  • Low-noise fan for classroom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, a low-noise classroom fan includes a motor 1, a fixed seat 2 arranged at the lower end of the motor 1, and a fan blade 3 connected to the fixed seat 2; it also includes shields connected to the left and right sides of the fixed seat 2 4 and the sound-absorbing unit 5 that is fixed on fan blade 3 around.

[0024] In this embodiment, the baffles 4 arranged on the left and right sides of the fixed seat 2 will guide the wind force, and the noise reduction unit 5 arranged around the fan blade 3 will reduce the noise generated by the rotation of the fan blade 3 to ensure student's listening efficiency.

Embodiment 2

[0026] In this embodiment, on the basis of Embodiment 1, the noise reduction unit 5 includes an acoustic wave induction device 6 that converts noise into a first electrical signal, and an acoustic wave induction device connected to the acoustic wave induction device 6 that converts the first electrical signal into equal magnitude and opposite phase The processing chip 7 that outputs the second electric signal and the sound wave generator 8 that is connected to the output end of the processing chip 7 and converts the second electric signal into sound waves; . The acoustic wave induction device 6 , the processing chip 7 and the acoustic wave generator 8 are evenly arranged on the inner wall of the shield 4 .

[0027] In this embodiment, the noise generated by the rotation of the fan blade 3 is processed by the acoustic wave induction device 6 and the processing chip 7 in sequence, and then the acoustic wave generator 8 will produce an acoustic wave that is equal in magnitude to ...

Embodiment 3

[0029] In this embodiment, on the basis of embodiment 1 or embodiment 2, the shield 4 is an arc-shaped structure.

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PUM

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Abstract

The invention discloses a low-noise fan for a classroom. The low-noise fan comprises a motor, a fixed base arranged at the lower end of the motor and fan blades connected to the fixed base. The low-noise fan further comprises blocking covers connected to the left side and the right side of the fixed base and noise reduction units fixed to the periphery of the fan blades. In the low-noise fan, the blocking covers arranged on the left side and the right side of the fixed base achieve the flow guide effect on wind power. By means of the arrangement sound wave induction devices, processing chips and sound wave generators, sound waves with the intensity equal to that of noise and the waveform phase opposite to that of the noise can be generated; and according to the wave interference principle, the noise is lowered, and the effect of noise reduction is achieved.

Description

technical field [0001] The invention relates to a fan, in particular to a low-noise classroom fan. Background technique [0002] When summer comes, cooling school classrooms usually requires the use of fans, however existing fans are open and bladed. When in use, the fan rotation often makes a lot of noise. Existing school teaching is generally taught by the teacher orally, and the sound of the fan rotating is too loud to drown the teacher's voice so that the students cannot hear it, thereby affecting the educational effect. Moreover, the sound of the fan rotating is also likely to make the students distracted and distracted. Contents of the invention [0003] In order to solve the defect that the fan rotates loudly, the present invention provides a low-noise classroom fan. [0004] Technical scheme of the present invention is as follows: [0005] A low-noise classroom fan, comprising a motor, a fixing seat arranged at the lower end of the motor, and fan blades connecte...

Claims

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Application Information

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IPC IPC(8): F04D25/08F04D29/66F04D29/54F04D29/32F04D29/38F04D29/00
Inventor 蒋轶
Owner 华蓥市双河第二初级中学
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