SYSTEM AND METHOD OF CONTROLLING A WATER HEATER HAVING A POWERED ANODE

Title:

SYSTEM AND METHOD OF CONTROLLING A WATER HEATER HAVING A POWERED ANODE

Document Type and Number:

WIPO Patent Application WO/2018/089485

Kind Code:

A3

Abstract:

A gas-fired appliance includes a tank configured to store a fluid to be heated, a powered anode extending into the tank and configured to generate an electric anode current, and a combustion chamber including a burner configured to generate products of combustion. The appliance also includes an exhaust structure, a heat exchanger, and an electronic processor coupled to the powered anode. The products of combustion flow from the combustion chamber to the exhaust structure via the heat exchanger. The electronic processor is configured to determine a duty cycle of the burner, determine whether the duty cycle of the burner exceeds a predetermined threshold, increase a magnitude of a protection parameter of the powered anode from a first value to a second value when the duty cycle of the burner exceeds the predetermined threshold, and control the powered anode according to the second value of the protection parameter.

Inventors:

KNOEPPEL RAY (US)
SCHULTZ MICHAEL (US)
ROONEY TIMOTHY (US)
VAN SISTINE THOMAS (US)

Application Number:

PCT/US2017/060627

Publication Date:

June 06, 2019

Filing Date:

November 08, 2017

Export Citation:

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Assignee:

SMITH CORP A O (US)

International Classes:

F24H9/20; F24H1/20; F24H9/02; H05B3/78

Foreign References:

US20090308332A1	2009-12-17
US20090056644A1	2009-03-05
US20060083491A1	2006-04-20
US4972066A	1990-11-20
US20040139929A1	2004-07-22
US6435424B1	2002-08-20

Other References: