DE10342924A1 - Thermal two-point switch - Google Patents

Thermal two-point switch Download PDF

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Publication number
DE10342924A1
DE10342924A1 DE10342924A DE10342924A DE10342924A1 DE 10342924 A1 DE10342924 A1 DE 10342924A1 DE 10342924 A DE10342924 A DE 10342924A DE 10342924 A DE10342924 A DE 10342924A DE 10342924 A1 DE10342924 A1 DE 10342924A1
Authority
DE
Germany
Prior art keywords
heating resistor
electric
switch
supply current
dependent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE10342924A
Other languages
German (de)
Other versions
DE10342924B4 (en
Inventor
Andreas Gessler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GESLER ELECTRONIC GmbH
Original Assignee
GESLER ELECTRONIC GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GESLER ELECTRONIC GmbH filed Critical GESLER ELECTRONIC GmbH
Priority to DE10342924A priority Critical patent/DE10342924B4/en
Priority to AT04765068T priority patent/ATE361650T1/en
Priority to PCT/EP2004/010142 priority patent/WO2005027577A1/en
Priority to DE502004003714T priority patent/DE502004003714D1/en
Priority to EP04765068A priority patent/EP1665885B1/en
Publication of DE10342924A1 publication Critical patent/DE10342924A1/en
Application granted granted Critical
Publication of DE10342924B4 publication Critical patent/DE10342924B4/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0208—Switches actuated by the expansion or evaporation of a gas or liquid
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices

Abstract

The invention relates to a thermal two point switch comprising a heating resistor (R19; R18) with a temperature dependent resistance value, a switch (S1) for closing an electric circuit of the heating resistor (R18, R19) fed by a supply current at a first temperature and for opening the electric current at a second higher temperature. The invention also relates to a method for switching off a heating resistor (R19; R18). According to the invention, means (R14, R19) are provided to detect a first electric signal dependent on the resistance value of the heating resistor (R19, R18) and the value of the supply current are provide, in addition to means (R12, R13) which are used to detect a second electric signal which is only dependent on the value of the supply current, in addition to a comparator (KS) which is used to compare third and fourth signals derived from said electric signals in order to ensure that the electrical heating resistor works in a safe and reliable manner. An output signal of the comparator (KS) is fed to a control input of the switch (S1).
DE10342924A 2003-09-15 2003-09-15 Overheat protection circuit and method of operation thereof Expired - Fee Related DE10342924B4 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE10342924A DE10342924B4 (en) 2003-09-15 2003-09-15 Overheat protection circuit and method of operation thereof
AT04765068T ATE361650T1 (en) 2003-09-15 2004-09-10 TWO-POINT THERMAL SWITCH AND METHOD FOR TURNING OFF A HEATER
PCT/EP2004/010142 WO2005027577A1 (en) 2003-09-15 2004-09-10 Thermal two point switch and method for switching off a heating resistor
DE502004003714T DE502004003714D1 (en) 2003-09-15 2004-09-10 THERMAL TWO-POINT SWITCH AND METHOD FOR SWITCHING OFF A HEAT RESISTANCE
EP04765068A EP1665885B1 (en) 2003-09-15 2004-09-10 Thermal two-point switch and method for switching off a heating resistor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10342924A DE10342924B4 (en) 2003-09-15 2003-09-15 Overheat protection circuit and method of operation thereof

Publications (2)

Publication Number Publication Date
DE10342924A1 true DE10342924A1 (en) 2005-04-28
DE10342924B4 DE10342924B4 (en) 2006-07-06

Family

ID=34305833

Family Applications (2)

Application Number Title Priority Date Filing Date
DE10342924A Expired - Fee Related DE10342924B4 (en) 2003-09-15 2003-09-15 Overheat protection circuit and method of operation thereof
DE502004003714T Active DE502004003714D1 (en) 2003-09-15 2004-09-10 THERMAL TWO-POINT SWITCH AND METHOD FOR SWITCHING OFF A HEAT RESISTANCE

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE502004003714T Active DE502004003714D1 (en) 2003-09-15 2004-09-10 THERMAL TWO-POINT SWITCH AND METHOD FOR SWITCHING OFF A HEAT RESISTANCE

Country Status (4)

Country Link
EP (1) EP1665885B1 (en)
AT (1) ATE361650T1 (en)
DE (2) DE10342924B4 (en)
WO (1) WO2005027577A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005029921A1 (en) * 2005-06-22 2007-01-04 BSH Bosch und Siemens Hausgeräte GmbH Heating device for fluids and household appliance
DE102005056708A1 (en) * 2005-11-28 2007-05-31 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement for e.g. electric stove, has fuse switch operated based on temperature of cooking device, so that power supply at heating units is interruptible via coupler switch during exceeding of marginal temperature of device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124187C1 (en) * 1991-07-20 1992-11-12 Eldeco Elektronik Entwicklungen Gmbh, 7910 Neu-Ulm, De Temp. regulating circuitry for electrical heating element - uses current measuring resistor and reference voltage forming divider consisting of ohmic resistors in series with element
DE19640009A1 (en) * 1996-09-27 1998-04-02 Bosch Gmbh Robert Circuit arrangement for controlling a heating resistor
US5841204A (en) * 1997-03-21 1998-11-24 English; Larry G. Temperature control system and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086466A (en) * 1976-04-30 1978-04-25 Scharlack Ronald S Automatic heater controller
DE3818974A1 (en) * 1988-06-03 1990-02-08 Ruthenberg Gmbh Waermetechnik CONTROL AND MONITORING CIRCUIT FOR ELECTRIC SEAT HEATERS, ESPECIALLY OF MOTOR VEHICLES
DE19711291A1 (en) * 1997-03-18 1998-09-24 Bosch Siemens Hausgeraete Process for regulating thermal paths and heating devices in household appliances
GB2336481B (en) * 1998-04-06 2002-10-16 Otter Controls Ltd Improvements relating to control of electric heating elements
DE10028152A1 (en) * 2000-06-07 2001-12-13 Bsh Bosch Siemens Hausgeraete Immersion heater for e.g. hot water storage tank, includes switch and second heating element in protective tube, thermally-coupled to first element

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124187C1 (en) * 1991-07-20 1992-11-12 Eldeco Elektronik Entwicklungen Gmbh, 7910 Neu-Ulm, De Temp. regulating circuitry for electrical heating element - uses current measuring resistor and reference voltage forming divider consisting of ohmic resistors in series with element
DE19640009A1 (en) * 1996-09-27 1998-04-02 Bosch Gmbh Robert Circuit arrangement for controlling a heating resistor
US5841204A (en) * 1997-03-21 1998-11-24 English; Larry G. Temperature control system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005029921A1 (en) * 2005-06-22 2007-01-04 BSH Bosch und Siemens Hausgeräte GmbH Heating device for fluids and household appliance
DE102005056708A1 (en) * 2005-11-28 2007-05-31 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement for e.g. electric stove, has fuse switch operated based on temperature of cooking device, so that power supply at heating units is interruptible via coupler switch during exceeding of marginal temperature of device

Also Published As

Publication number Publication date
DE502004003714D1 (en) 2007-06-14
ATE361650T1 (en) 2007-05-15
EP1665885A1 (en) 2006-06-07
DE10342924B4 (en) 2006-07-06
EP1665885B1 (en) 2007-05-02
WO2005027577A1 (en) 2005-03-24

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee