A fan failure over-temperature protection method, device and system

Abstract

The embodiment of the present invention provides a fan failure over-temperature protection method, device and system. The protection method first obtains the current temperature of the switch tube to be detected, and then judges whether the fan fails, and if so, determines the input amount of the fan failure over-temperature protection is the current temperature, if not, determine that the input of the fan failure over-temperature protection is the first preset value, use the current temperature as the hysteresis of the fan failure over-temperature protection, and based on the current temperature, determine the output fan Threshold for failing over-temperature protection. Afterwards, it is judged whether the input amount is greater than the threshold value, and if yes, over-temperature protection is performed. It can be seen that this scheme determines the threshold value and input amount according to the detected current temperature and fan failure status, and triggers over-temperature protection when the input amount is greater than the threshold value. Since the threshold value of over-temperature protection is determined by the current temperature, it is not a fixed value, so , it can realize the over-temperature protection of the UPS after the failure of the fan and improve the accuracy of the 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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