Fan control method, system and electrical equipment with cooling fan

Abstract

The invention relates to a fan control method and system and electrical appliance equipment provided with a heat dissipation fan. The method comprises the following steps: acquiring fan input voltage;processing and analyzing the fan input voltage to generate a speed-regulating control signal; and controlling a fan working state according to the speed-regulating control signal, and regulating rotation speed of the fan. The fan control method enables the fan to operate with low noises and low speed under a low-heating-value working state of the electrical appliance, also enables the fan to operate at high speed under a high-heating-value working state of the electrical appliance, and guarantees that the noises meet product requirements.

Description

technical field [0001] The invention relates to the field of fan control, in particular to a fan control method, system and electrical equipment with a cooling fan. Background technique [0002] At present, in the fan control schemes of electrical products with cooling fans, most of them directly control the operation within the rated speed range, and some of them simply adjust the fan speed through software control. It does not reflect the actual heat dissipation requirements of electrical hardware, nor does it achieve the best noise state under the premise of ensuring temperature rise. It is a passive and rough heat dissipation process. [0003] For circuit boards or electrical appliances that do not generate much heat by themselves, when they are working in a low-heat state, it is only necessary to meet the heat dissipation requirements of the device during the actual work process, and the fan does not need to continue to run at high speed. On the one hand, the noise of ...

AI Technical Summary

Problems solved by technology

On the one hand, the noise of the fan running at high speed will be relatively large. On the other hand, the continuous high-speed operation of the fan will also have a certain impact on the life of its driver chip.

[0004] Simply use software to set the speed of the fan, and the control of the speed is only determined by the settings of the programmer, which cannot reflect the temperature rise of the components in the electrical cavity during the actual working process in real time, nor can it obtain the ideal noise state.

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