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Power management system and method for maximizing heat delivered to dialysate in a dialysis machine

  • US 5,624,572 A
  • Filed: 06/07/1995
  • Issued: 04/29/1997
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. A dialysis machine which consumes electrical power supplied from an electrical service but which is limited by a predetermined maximum allowed electrical power consumption value, the dialysis machine including an electrical heater for heating dialysate supplied to a dialyzer to a selected temperature during a dialysis treatment, the dialysis machine also including components other than the heater, the heater and the other components consuming electrical power supplied to the machine from the electrical service, the dialysis machine also including a power management system operative to regulate the relative amount of electrical power delivered to the heater and to the other components without exceeding the predetermined maximum allowed electrical power consumption value, the power management system comprising:

  • a power sensor connected to the electrical service and operative to supply a power signal related to an amount of instantaneous power consumed by the machine; and

    a controller responsive to the power signal and operative to;

    derive a power consumed value from the power signal, the power consumed value related to the power actually consumed by the dialysis machine;

    compare the power consumed value to the predetermined maximum allowed electrical power consumption value; and

    in response to the comparisoncontrol the total amount of power delivered to the heater to make available the maximum amount of power to the heater which still assures supply of power needed for consumption by the other components while simultaneously regulating the total power consumption of the dialysis machine to a value not substantially exceeding the predetermined maximum allowed electrical power consumption value.

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