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Noise-reducing axial flow fan

An axial flow fan and noise reduction technology, which is applied in the direction of mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of inability to cut and comb large eddy currents, cannot form ideal airflow, and cannot play the role of guiding, etc., to achieve reduction The effects of personal injury, timely heat dissipation, and uniform air supply

Inactive Publication Date: 2014-04-16
ZHANGJIAGANG ZHONGXIN FAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcomings: First, the rear edge of the blade is a corrugated surface section, which can neither effectively cut and comb the large vortex generated at the wind outlet into countless small eddies, nor can it effectively separate the viscous airflow to the blade root, which is not effective. Due to the guiding effect, the ideal airflow cannot be formed, so the efficiency is low and the noise is large

Method used

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  • Noise-reducing axial flow fan
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Examples

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Embodiment Construction

[0018] Such as figure 1 figure 2 As shown, a noise-reducing axial flow fan includes a housing, an impeller is installed in the housing, a protective cover is installed in the housing, a motor is arranged on the outer wall of the housing, and the two ends of the housing are A support seat is provided, the two sides of the support seat and the bottom edge are mutually inclined, and a rubber pad is provided at the lower end of the bottom edge of the support seat.

[0019] The tail of each fan blade of the impeller has a plurality of unequal sawtooth slots. The unequal-spaced sawtooth cuts and combs the large vortex generated at the outlet of the wind into countless small eddies, and controls the viscous airflow at the root of the fan blade. Effective separation and guidance, resulting in an ideal airflow.

[0020] The blade adopts a new type of high-efficiency forward-swept sickle blade with circular arc thin plate, which is designed according to the negative exponential flow ...

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Abstract

The invention discloses a noise-reducing axial flow fan comprising a shell, an impeller is mounted in the shell, multiple unequal sawtooth grooves are formed in the tail of each blade of the impeller, non-equidistant sawteeth cut and comb a large eddy generated at the air outing position to form a plurality of small eddies, viscous air flow at roots of the blades is effectively separated and guided so as to form desired air flow. The axial flow fan is reasonable in structural design, stable in operation, uniform in air supply and stable in placement. An external motor dissipates heat timely by itself without affecting operation, automatic induction and alarm reminding can be performed when the fan is under abnormal actions in operation, and accordingly danger coefficient is lowered; meanwhile, the motor can be powered off automatically, the impeller stops operation immediately, and personal injuries are minimized.

Description

technical field [0001] The invention relates to a noise reduction axial flow fan. Background technique [0002] Axial flow fans are generally suitable for ventilation in factories, warehouses, offices, and residences or to enhance heating and heat dissipation. They can also be installed in series at intervals in longer exhaust ducts to increase the wind pressure in the ducts. However, the traditional axial flow fan usually has a built-in motor, so that the motor will release heat inside it, which affects the efficiency of exhaust and heat dissipation; in addition, the axial flow fan vibrates greatly when it runs, and the base is unstable and easy to fall over; Touch the fan, the fan will run as usual without prompting, the personal safety will be greatly threatened, and it will also affect the normal operation of the fan. [0003] CN201159203Y, titled "a low-noise axial flow fan blade", the blade is forward-swept, and has an acute angle of 20° to 35°; the blades are curved ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D25/08F04D29/38F04D29/66
Inventor 王家银
Owner ZHANGJIAGANG ZHONGXIN FAN
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