Water heater with mix tank fluid time delay for causal feedforward control of hot water temperature

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO RE49883
SERIAL NO

17452265

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Importance

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Abstract

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A water heater includes a heat exchanger. A controllable three-way proportional valve provides a proportionally controllable flow to the hot water inlet of the heat exchanger and a boiler return water outlet. A mixing tank mixes a cold water and a hot water. The mixing tank provides a time delayed mixed water. A temperature sensor is disposed in or on the mixing tank to measure a temperature of the time delayed mixed water to provide a time delayed mixed water temperature. A feedforward control process running on a processor adjusts a proportional operating position of the controllable three-way proportional valve to regulate a temperature of hot water at the hx domestic hot water outlet based on the temperature of the time delayed mixed water temperature. A method for controlling a hot water temperature of a water heater a water heater using a flowmeter based feedforward control are also described.

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Patent Owner(s)

Patent OwnerAddress
WATTS REGULATOR CONORTH ANDOVER MA 01845

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Daniels, Mark Valley Cottage, US 37 287
Voicu, Adrian Bloomfield, US 3 5

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