US 5,174,364 AGranted

Cooling abnormality detection system for electronic equipment

AssigneeNEC Corporation

InventorTsukasa Mizuno

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Abstract

A cooling abnormality detection system for external electronic equipment includes a protection unit, a flowmeter, a water level gauge, a pump operation detector, an abnormal temperature sensor. The flowmeter detects a decrease in flow rate of the liquid coolant supplied from the electronic equipment. The water level gauge is arranged in the coolant tank to detect a decrease in water level of the liquid coolant. The pump operation detector is arranged in a pump to detect an operation of the pump. The abnormal temperature sensor detects an abnormal temperature of the electronic equipment. The protection unit discriminates a cooling abnormality when an abnormal temperature is detected by the temperature sensor during the operation of the pump and discriminates a cooling abnormality when an abnormality is detected by any one of the flow meter, the warer level gauge, and the abnormal temperature sensor during operation of the pump.

Claims1

Dependent claims

A cooling abnormality detection system for external electronic equipment, including a heat exchanger for performing the heat exchange of a liquid coolant supplied from external electronic equipment, a coolant tank for receiving the coolant and absorbing the expansion thereof, and a protection unit for detecting a cooling abnormality during a detection of a decrease in flow rate of the liquid coolant, said protection unit being arranged to stop the power supply to given electronic equipment when a cooling abnormality of said given electronic equipment is detected, comprising:

flow rate detecting means for detecting a decrease in flow rate of the liquid coolant supplied from said electronic equipment;
liquid level detecting means, arranged in said coolant tank, for detecting any decrease in the level of the liquid coolant;
pump abnormal state detecting means arranged in said pump for detecting an abnormal state of said pump;
and
abnormal temperature detecting means for detecting an abnormal temperature of said electronic equipment;
wherein said protection unit identifies a cooling abnormality when an abnormal temperature is detected by said temperature detecting means, with no detection of a decrease in the flow rate of the liquid coolant by said flow rate detecting means, and further identifies a cooling abnormality when an abnormality is detected by any one of said pump abnormal state detecting means, said water level detecting means, and said abnormal temperature detecting means.

3 more elements

Dependencies are inferred from the claim text.