Fan failure over-temperature protection method, device and system

Abstract

The embodiment of the invention provides a fan failure over-temperature protection method, device and system. The fan failure over-temperature protection method comprises the steps: firstly, the current temperature of a to-be-detected switch tube is obtained, then whether a fan loses efficacy or not is judged, if yes, the input amount of fan failure over-temperature protection is determined as thecurrent temperature, if not, the input amount of fan failure over-temperature protection is determined as a first preset value, the current temperature is used as the return difference of fan failureovert-temperature protection, and a threshold value of fan failure over-temperature protection is determined based on the current temperature; and then, whether the input amount is greater than the threshold value or not is judged, and if yes, over-temperature protection is carried out. It can be seen that according to the fan failure over-temperature protection method, the threshold value and the input amount are determined according to the detected current temperature and a fan failure state, over-temperature protection is triggered when the input amount is greater than the threshold value,the threshold value of over-temperature protection is determined by the current temperature and is not a fixed value, and thus the accuracy of over-temperature protection can be improved while a UPSafter a fan failure is subjected to over-temperature protection.

Description

technical field [0001] The invention relates to the technical field of equipment protection, in particular to a fan failure over-temperature protection method, device and system. Background technique [0002] In the UPS system, fans are usually used to dissipate heat for the system. When the fan fails, the temperature in the UPS cabin, the temperature of the heat sink, and the temperature of the inductor will gradually increase. At present, by collecting the temperature of the heat sink, when the temperature is higher than the protection threshold, over-temperature protection is performed. [0003] However, the inventors found that the rising speed of the temperature in the system cabin and the temperature of the heat sink is lower than that of the inductor temperature. Therefore, the temperature of the heat sink has not yet reached the protection threshold, but the temperature of the inductor is too high, causing the inductor to be damaged and the machine to malfunction. ...

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Problems solved by technology

[0003] However, the inventor found that the rising speed of the temperature in the system cabin and the temperature of the heat sink will be lower than the rising speed of the inductor temperature

Therefore, the temperature of the heat sink has not reached the protection threshold, but the temperature of the inductor is too high, resulting in damage to the inductor and machine failure.

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