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Electronically controlled hot water recirculation pump with data logging

  • US 9,207,682 B2
  • Filed: 11/14/2013
  • Issued: 12/08/2015
  • Est. Priority Date: 02/18/2010
  • Status: Active Grant
First Claim
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1. A smart pump for a building hot water system comprising in combination:

  • a water pump mechanism;

    a microcontroller comprising a data input for receiving data electronically from a sensor for sensing the flow of hot water through a hot water piping system, a time clock, a database for receiving, logging and recording data signals from a flow sensor indicating the times when a flow of hot water occurred during a pre-defined data logging time period, an operational connection to the water pump mechanism, and a software algorithm in the microcontroller for instructing the microcontroller to operate the water pump mechanism at predetermined times based upon the logged and recorded data signals;

    the water pump mechanism automatically, operationally controlled by the microcontroller in accordance with the logged and recorded hot water flow times in the data pattern generated from occurrences of hot water flows logged by the microcontroller during the immediately prior pre-defined data logging period without further input from an operator, the water pump mechanism operating to recirculate hot water through the hot water system, the logging, recording and data pattern generation occurring during each pre-defined data logging period in order to update the logged usage pattern data on an ongoing basis; and

    the micro-controller receiving logging and recording data signals during each successive pre-defined data logging time period and utilizing the recorded data signals from the flow sensor for automatically controlling the recirculation flow times for the next successive time period.

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