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Anti-entrapment and anti-dead head function

  • US 9,551,344 B2
  • Filed: 12/04/2013
  • Issued: 01/24/2017
  • Est. Priority Date: 08/26/2004
  • Status: Active Grant
First Claim
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1. A pumping system for at least one aquatic application, the pumping system comprising:

  • a pump;

    a motor coupled to the pump;

    an interface associated with the pump designed to receive input instructions from a user; and

    a controller in communication with the motor,the controller designed to detect and respond to a blockage condition, which is at least one of an entrapment condition or a deadhead condition, based on a power consumption value of the motor, and further including an auto-restart function that is designed to allow the pump to automatically restart after detection of the blockage condition, the controller undertaking a fast detection method in response to the entrapment condition and the controller undertaking a slow detection method in response to the deadhead condition, the fast detection method designed to alert the controller upon a first occurrence of a blockage event and the slow detection method designed to alert the controller upon a plurality of blockage events.

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