Pump and pump control circuit apparatus and method
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United States of America Patent
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Feb 4, 2014
Grant Date -
Jul 31, 2008
app pub date -
Oct 31, 2007
filing date -
Nov 26, 2001
priority date (Note) -
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Abstract
Embodiments of the invention provide a method of controlling a pump. The method includes sensing a pressure in the pump and entering a low-flow mode when the sensed pressure in the pump is greater than a low pressure threshold. The method also includes reducing power to the pump when the sensed pressure is greater than a shut-off pressure during the low-flow mode and there is flow through the pump until the sensed pressure is less than the shut-off pressure. The method further includes turning the pump off when in the low-flow mode the sensed pressure is greater than the shut-off pressure and there is no flow through the pump.
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