Heat dissipation fan delay control system

Abstract

The invention particularly relates to a heat dissipation fan delay control system. A shutdown detection unit, a temperature collecting unit, a central processor, a storage battery and a circuit switchare included. The shutdown detection unit and the temperature collecting unit are connected with the central processor. The storage battery is provided with a USB charging interface and provides a power source for a heat dissipation fan. The circuit switch is arranged between the storage battery and the heat dissipation fan. The central processor controls the on-off states of the circuit switch.According to the system, after a computer shuts down and the temperature in a machine case is larger than the set value, the circuit switch is controlled to be closed, the storage battery continuouslysupplies power to the heat dissipation fan, the heat dissipation fan continuously runs till the temperature in the machine case is reduced to the set value or below, then, the circuit switch is controlled to be disconnected, and the heat dissipation fan stops running.

Description

technical field [0001] The invention specifically relates to a cooling fan delay control system. Background technique [0002] Due to the advancement of science and technology, the refinement of the manufacturing process of integrated circuits and various electronic components, the speed of calculation and processing per unit time is also faster, and the heat generated is relatively increasing. In order to meet the needs of the above-mentioned integrated circuit (CPU) and drive its internal devices (such as: optical, disk drive), the power supply must provide higher power output, especially in the processing of various devices in the computer. The speed increases sharply, and the heat generated is also relatively increased, so it is necessary to install more fans to dissipate heat (by the way, the power source of the fans is still from the power supply), so in order to provide the power demand of the aforementioned loads, the power supply The power supply must maintain the ...

AI Technical Summary

Problems solved by technology

In order to meet the needs of the above-mentioned integrated circuit (CPU) and drive its internal devices (such as: optical, disk drive), the power supply must provide higher power output, especially in the processing of various devices in the computer. The speed increases sharply, and the heat generated is also relatively increased, so it is necessary to install more fans to dissipate heat (by the way, the power source of the fans is still from the power supply), so in order to provide the power demand of the aforementioned loads, the power supply The power supply must maintain the high power output mode, which causes the electronic components (such as commutators, voltage regulators, etc.) used for step-down rectification to increase heat. When the computer is running, the electronic components and the commutator , Transformers, etc., can achieve the cooling effect by blowing the preset fan. However, when the computer is turned off by the user (Soft off), the fan is simultaneously cut off from the power supply and stops running, and at the same time stops the blowing of the wind. Since the general operating temperature of the integrated circuit, electronic components, commutator, transformer, etc. is already quite high, when the fan suddenly stops, the remaining heat will gradually accumulate due to not being hit by the wind, causing its temperature to rise suddenly. Its temperature often exceeds the normal working temperature and lasts for a long time, that is, the so-called return temperature phenomenon occurs. At this stage, it often causes damage to the integrated circuit or the aforementioned electronic components or affects the service life of the system.

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