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Cooling abnormality detection system for electronic equipment

  • US 5,301,743 A
  • Filed: 09/16/1992
  • Issued: 04/12/1994
  • Est. Priority Date: 09/21/1988
  • Status: Expired due to Fees
First Claim
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1. A cooling abnormality detection system for external electronic equipment, including a heat exchanger for performing the heat exchange of a liquid coolant supplied from the external electronic equipment, a coolant tank for absorbing expansion of the liquid coolant supplied from said heat exchanger, a pump for circulating the liquid coolant stored in the coolant tank to the external electronic equipment, and a protection unit for detecting a cooling abnormality of the liquid coolant in said electronic equipment, said protection unit being arranged to stop the power supply to a given electronic equipment when the cooling abnormality of said given electronic equipment is detected, thereby preventing reliability degradation and breakdown of said electronic equipment, said protection unit comprising:

  • temperature measuring means for detecting the temperature of said electronic equipment while said electronic equipment is being powered;

    timer means for starting counting a predetermined period of time when said electronic equipment is powered and for outputting a signal when the predetermined period of item elapses;

    first abnormal temperature discriminating means, which operates until a time-out signal is output from said timer means, for discriminating whether one temperature measured by said temperature measuring means is an abnormal temperature;

    second abnormal temperature discriminating means, which operates after the time-out signal is output from said timer means, for discriminating whether a plurality of temperatures measured by said temperature measuring means are abnormal temperatures; and

    abnormality alarm means for receiving an abnormality signal from at least one of said first and second abnormal temperature discriminating means for stopping the power supply to said internal electronic equipment.

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