A computer and cooling fan drive delay control circuit
A heat dissipation fan and time-delay control technology, which is applied in pump control, machine/engine, mechanical equipment, etc., can solve the problems of narrow fan speed control range and large static work loss, so as to improve safety and reliability, effectively dissipate heat, and realize The effect of a linear change
Active Publication Date: 2016-01-27
CHINA GREATWALL TECH GRP CO LTD
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[0005] The purpose of the present invention is to provide a drive delay control circuit for cooling fans, which aims to solve the technical problems of the existing cooling fan drive and speed control circuits, such as large static work loss and narrow control range for fan speed.
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[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0016] The drive delay control circuit of the cooling fan provided by the present invention includes a main drive control module and a shutdown delay module, which can not only keep the cooling fan at a stable low speed from the beginning of the system to stable operation, but also reduce the main drive control. The static working loss of the module part can be quickly discharged when the system accumulates too much heat, so as to realize the linear change of the speed of the cooling fan, and it can also delay the operation of the cooling fan for a period of time when the system is shut down to achi...
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The invention belongs to the technical field of electronic product radiating and particularly relates to a computer and radiating fan drive delay control circuit. The computer and radiating fan drive delay control circuit comprises a main drive control module and a shutdown delay module. When a system starts to operate or operates at low power consumption, a radiating fan is stably kept at a low rotation speed to reduce system noise; when the system reaches a certain temperature, the rotation speed of the radiating fan can be adjusted and controlled linearly; during system shutdown, shutdown of the radiating fan can be delayed to allow the radiating fan to keep operation for a certain period of time so as to effectively discharge residual heat of the system, and accordingly safety and reliability of the system can be increased, and service life of the system can be prolonged.
Description
technical field [0001] The invention belongs to the technical field of heat dissipation of electronic products, and in particular relates to a driving delay control circuit of a computer and a cooling fan. Background technique [0002] In the case of the system mainframe (such as a home desktop computer) of general electronic products, a large part of the power consumed by the operation of electronic components is dissipated in the form of heat, causing the temperature inside the case to rise. Most electronic components will affect their electrical quality and shorten their service life due to the increase in temperature. To solve this problem, fans are usually installed inside the system and forced air cooling is used to dissipate heat from the system. [0003] Ordinary fan heat dissipation method is to directly apply a fixed DC voltage to the fan, and the fan speed is fixed. Although this method is simple in circuit, it has the following disadvantages: First, it is to ensu...
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IPC IPC(8): F04D27/00
Inventor 许于星李伟平黄昌宾
Owner CHINA GREATWALL TECH GRP CO LTD