Global Patent Index - EP 1076212 A2

EP 1076212 A2 2001-02-14 - Control and method for electric water heater operation

Title (en)

Control and method for electric water heater operation

Title (de)

Verfahren und Vorrichtung zur Steuerung eines elektrischen Wasserheizers

Title (fr)

Méthode et dispositif de commande pour chauffe-eau électrique

Publication

EP 1076212 A2 (EN)

Application

EP 00306820 A

Priority

US 37386399 A

Abstract (en)

A control and method for preventing dry start of an electric water heater provides activation of a bottom heating element for a short time and then senses the temperature to detect the absence or presence of water around the bottom heating element. In the absence of water, the control prevents further activation of the heating element. If water is present, the bottom heating element is activated to heat the water to a set point temperature. An additional upper heating element is activatable only after its temperature falls a predetermined amount below the set point temperature. The control may also include a programmable time having the ability to vary the turn off set point temperature in a predetermined manner during different times of a given day and/or week as well as to provide a convenient way to maintain a reduced turn off set point temperature for an extended period of time. <IMAGE>

IPC 1-7 (main, further and additional classification)

F24H 9/20

IPC 8 full level (invention and additional information)

F24H 9/20 (2006.01)

CPC (invention and additional information)

F24H 9/2021 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1076212 A2 20010214; EP 1076212 A3 20021218; AU 4880800 A 20010215; CA 2314190 A1 20010213; CN 1284635 A 20010221; NO 20004058 A 20010214; NO 20004058 D0 20000811

INPADOC legal status


2003-10-16 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

2003-09-10 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030301

2002-12-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2002-12-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI

2001-02-14 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-02-14 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI