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Method for controlling the rotation speed of fan

A control method and fan speed technology, applied in the field of control, can solve the problems of reduced heat dissipation effect of cooling fans, reduced air output, and increased static pressure value

Inactive Publication Date: 2011-09-21
YEN SUN TECH CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although changing the fan speed by changing the ambient temperature can be applied to most heat dissipation requirements, the change in the ambient temperature may be caused by the shielding of the air inlet or outlet of the cooling fan or the change of fluid resistance. Decrease in static pressure and increase in static pressure will reduce heat dissipation effect of cooling fan and cause heat accumulation. Therefore, the fan speed control method that uses changes in ambient temperature to change fan speed is not suitable for air inlet or outlet. Fans where shadowing from time to time or where fluid resistance may change

Method used

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  • Method for controlling the rotation speed of fan
  • Method for controlling the rotation speed of fan
  • Method for controlling the rotation speed of fan

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

[0021] refer to figure 2 , a preferred embodiment of the fan speed control method of the present invention includes a detection step 11 , a judgment step 12 , an adjustment step 13 and a confirmation step 14 .

[0022] refer to figure 2 , image 3 , the detection step 11 is to use a controller to detect an operation flow resistance value generated when the fan is running. In this preferred embodiment, the controller is a programmable micro control unit (Micro Controller Unit, MCU), and the running flow resistance value is the current value required to drive the fan, and the running flow resistance value is related to the Shading is inversely proportional to fan operation....

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Abstract

The invention relates to a method for controlling the rotation speed of a fan. The method sequentially comprises a detection step, a judging step, a regulating step and a confirming step; the detection step is used for detecting an operation flow resistance value generated by the rotation of the fan; and a controller is utilized for the judging step to judge whether the operation flow resistance value is less than a set flow resistance value, if the operation flow resistance value is less than the set flow resistance value, the regulating step begins to increase the rotation speed of the fan, and the confirming step is used for maintaining the rotation speed of the fan. The rotation speed of the fan is regulated by utilizing the comparison of the operation flow resistance value and the set flow resistance value, not only are additional construction members not required to be added, but also because the air out quantity is in contrast to the shielded ratio of the fan, and the air out amount is controlled by the regulated flow resistance value, the fan can still maintain the optimum air out quantity and the optimum static pressure value at a fixed shielded ratio.

Description

technical field [0001] The invention relates to a control method, in particular to a fan speed control method. Background technique [0002] The heat dissipation effect of the existing heat dissipation fan mostly depends on the rotational speed of the fan, and the higher the rotational speed of the fan, the better the heat dissipation effect. However, the higher the rotation speed of the fan, the greater the noise will be relatively, and it will also consume more power. figure 1 The fan performance curve shown (static pressure-air volume curve, P-Q curve) determines the optimal air volume and static pressure value of the fan to achieve a balance between heat dissipation effect, noise value, and power consumption. [0003] With the advancement of technology, the volume of various electronic products is getting smaller and smaller, but the heat generated by the components is getting higher and higher. Therefore, in addition to reducing the heat generated by the components dur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00
Inventor 陈建荣刘贤文蔡子文
Owner YEN SUN TECH CORP
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