Importance

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Abstract

A pump system or device is provided for removing water from a pool cover or sump, featuring a controller configured to respond to a signal containing information about the ambient temperature in relation to a pump and to provide a controller signal containing information to control the operation of the pump based at least partly on the ambient temperature. The pumping system or device me be configured to include some combination of the following: temperature sensing, including a Thermistor, to change control logic at temperatures below a specific level (e.g. below 35 degrees F.); the initiation of impeller cycling at low operating temperatures to avoid ice formation in the impeller cavity and/or hose, but not for level sensing; the use of temperature feedback to turn off pump at low temperatures that may result in damage to the system; the addition of control logic to ignore torque increases due to contamination or flow-back Inclusion of soft-start of motor to reduce stress on impeller/motor; the option to connect Garden-style hose with an integral heating element to avoid freezing; a heating element to receive power from the pump via, e.g., a plug connector, where power to the heating element is supplied only when the temperature device is activated at some specified setting; the addition of a temperature sensor to render the pump inoperative if the temperature should fall below a set point (freezing); and/or the use of a field effect level sensor, such that the temperature sensing is substantially independent of the level of sensing device.

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First Claim