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DE10223032A1 - Electric heating device e.g. for immersing bath, has short-circuit switch connected across heating element and excess current trip in front of short-circuit switch - Google Patents

Electric heating device e.g. for immersing bath, has short-circuit switch connected across heating element and excess current trip in front of short-circuit switch

Info

Publication number
DE10223032A1
DE10223032A1 DE2002123032 DE10223032A DE10223032A1 DE 10223032 A1 DE10223032 A1 DE 10223032A1 DE 2002123032 DE2002123032 DE 2002123032 DE 10223032 A DE10223032 A DE 10223032A DE 10223032 A1 DE10223032 A1 DE 10223032A1
Authority
DE
Germany
Prior art keywords
short
circuit switch
heating element
temperature sensor
heating
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.)
Ceased
Application number
DE2002123032
Other languages
German (de)
Inventor
Leo Roeckert
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE2002123032 priority Critical patent/DE10223032A1/en
Publication of DE10223032A1 publication Critical patent/DE10223032A1/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/21058—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water
    • A47J27/21091—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water of electronic type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/12—Deep fat fryers, e.g. for frying fish or chips
    • A47J37/1266—Control devices, e.g. to control temperature, level or quality of the frying liquid

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

An electric heating appliance has a switching unit (3,4) comprises a short-circuit switch (3) connected across the heating element (2) and the excess current trip (4) in front of the short-circuit switch and the heating element in the heating current circuit (21), so that when the temperature limit is exceeded the temperature sensor (5) operates the short-circuit switch to transfer to the conducting state and the current flowing through the short-circuit switch trips the excess current trip.

Description

Die Erfindung betrifft ein elektrisches Heizgerät zur Erwärmung flüssiger oder gasförmiger Medien. The invention relates to an electric heater for Heating of liquid or gaseous media.

Bekannte gattungsgemäße Heizgeräte bestehen aus einem elektrischen Heizelement, einer Schalteinheit zur Ausschaltung des Heizstromes, einen die Temperatur des Heizgerätes erfassenden Temperaturfühler und einer Steuerungseinheit zur Ansteuerung der Schalteinheit, sodaß die Schalteinheit bei Überschreiten eines vorgegebenen Grenzwertes der Temperatur am Temperaturfühler den Heizstrom ausschaltet. Diese Schaltung hat den Nachteil, daß der Heizstrom während der gesamten Betriebszeit durch die Schalteinheit fließt und hierbei eine nicht vernachlässigbare Verlustwärme entsteht, die abgeführt werden muß. Known generic heaters consist of a electric heating element, a switching unit for Switching off the heating current, the temperature of the Heater detecting temperature sensor and one Control unit for controlling the switching unit, so that the switching unit when a predetermined one is exceeded Limit value of the temperature at the temperature sensor Heating current switches off. This circuit has the disadvantage that the heating current through during the entire operating time the switching unit flows and one does not negligible heat loss arises, which dissipates must become.

Der Erfindung liegt daher die Aufgabe zugrunde, die vorbeschriebenen Nachteile des bekannten Heizgertes zu beseitigen. The invention is therefore based on the object above-described disadvantages of the known heater remove.

Diese Aufgabe wird dadurch gelöst, daß die Schalteinheit aus einem zum Heizelement parallel geschalteten Kurzschlußschalter und einem im Heizstromkreis vor den Kurzschlußschalter und dem Heizelement geschalteten Überstromauslöser besteht, sodaß bei Überschreiten des Temperaturgrenzwertes der Temperaturfühler den Kurzschlußschalter ansteuert, ihn in den leitenden Zustand versetzt und der dann durch den Kurzschlußschalter fließende Strom den Überstromauslöser auslöst. This object is achieved in that the switching unit from one connected in parallel to the heating element Short circuit switch and one in the heating circuit in front of the Short circuit switch and the heating element switched Overcurrent release exists so that when the Temperature limit of the temperature sensors Short circuit switch controls him in the conductive state offset and then flowing through the short circuit switch Current triggers the overcurrent release.

In den Unteransprüchen werden Ausgestaltungen und Fortbildungen der Erfindung beschrieben. Refinements and Developments of the invention described.

In der Zeichnung ist das Schaltbild des Heizgerätes wiedergegeben. In the drawing it is Circuit diagram of the heater played.

In dem Heizgerät 1 befindet sich das Heizelement 2, das über die Anschlüsse A, B mit dem Heizstrom versorgt wird. Zum Heizelement 2 ist ein Kurzschlußschalter 3 parallel geschaltet, der sich während des normalen Betriebs im nichtleitenden Zustand befindet. Der Kurzschlußschalter 3 ist vorzugsweise ein Thyristor. Das bedeutet, daß während des normalen Betriebs durch den Kurzschlußschalter kein Strom fließt und daher an diesem auch keine abzuführende Verlustwärme entsteht. In the heater 1 there is the heating element 2 , which is supplied with the heating current via the connections A, B. A short-circuit switch 3 is connected in parallel with the heating element 2 and is in the non-conductive state during normal operation. The short-circuit switch 3 is preferably a thyristor. This means that no current flows through the short-circuit switch during normal operation and therefore there is no heat loss to be dissipated.

Außen oder innen am Heizgerät 1 ist ein Temperaturfühler 5 angeordnet. Dieser kann ein Bimetallschalter oder ein Kontaktthermometer sein. Von dem Temperaturfühler 5 wird bei Erreichen, bzw. bei Überschreiten eines vorgegebenen Grenzwertes der Temperatur der Kurzschlußschalter 3 angesteuert und in den leitenden Zustand versetzt. Das hat zur Folge, daß der durch den Kurzschlußschalter 3 fließende Kurzschlußstrom sofort den Überstromauslöser 4 auslöst und somit der Heizstrom der durch das Heizelement 2 fließt unterbrochen bzw. ausgeschaltet wird. A temperature sensor 5 is arranged on the outside or inside of the heater 1 . This can be a bimetal switch or a contact thermometer. When the temperature sensor 5 reaches or exceeds a predetermined limit value, the short-circuit switch 3 is activated and switched to the conductive state. The result of this is that the short-circuit current flowing through the short-circuit switch 3 immediately triggers the overcurrent release 4 and thus the heating current flowing through the heating element 2 is interrupted or switched off.

Zwischen dem Temperaturfühler 5 und dem Kurzschlußschalter 3 kann eine in der Zeichnung nicht dargestellte Steuerungselektronik eingeschaltet sein. Control electronics (not shown in the drawing ) can be switched on between the temperature sensor 5 and the short-circuit switch 3 .

Die Sicherung 4 ist vorzugsweise im Heizgerät 1 angeordnet. Es ist aber auch möglich, die Sicherung 4 in der Anschlußleitung oder in einem externen Schaltschrank anzuordnen. The fuse 4 is preferably arranged in the heater 1 . However, it is also possible to arrange the fuse 4 in the connecting line or in an external control cabinet.

Claims (7)

1. Elektrisches Heizgerät zur Erwärmung flüssiger oder gasförmiger Nedien, mit einem elektrischen Heizelement, einer Schalteinheit zur Ausschaltung des Heizstromes, einen die Temperatur des Heizgerätes erfassenden Temperaturfühler und einer Steuerungseinheit zur Ansteuerung der Schalteinheit, sodaß die Schalteinheit bei Überschreiten eines vorgegebenen Grenzwertes der Temperatur am Temperaturfühler den Heizstrom ausschaltet, dadurch gekennzeichnet, daß die Schalteinheit (3, 4) aus einem zum Heizelement (2) parallel geschalteten Kurzschlußschalter (3) und dem im Heizstromkreis (21) vor den Kurzschlußschalter (3) und dem Heizelement (2) geschalteten Überstromauslöser (4) besteht, sodaß bei Überschreiten des Temperaturgrenzwertes der Temperaturfühler (5) den Kurzschlußschalter (3) ansteuert, ihn in den leitenden Zustand versetzt und der dann durch den Kurzschlußschalter (3) fließende Strom den Überstromauslöser (4) auslöst. 1.Electric heater for heating liquid or gaseous media, with an electric heating element, a switching unit for switching off the heating current, a temperature sensor that detects the temperature of the heating device and a control unit for controlling the switching unit, so that the switching unit when the temperature at the temperature sensor exceeds a predetermined limit value the heating off, characterized in that the switching unit (3, 4) from one to the heating element (2) connected in parallel short-circuiting switch (3) and connected in the heating current circuit (21) in front of the short-circuit switch (3) and the heating element (2) over-current release ( 4 ), so that when the temperature limit value is exceeded, the temperature sensor ( 5 ) controls the short-circuit switch ( 3 ), puts it in the conductive state and the current then flowing through the short-circuit switch ( 3 ) triggers the overcurrent release ( 4 ). 2. Elektrisches Heizgerät nach Anspruch 1 in der Funktion als Tauchbadwärmer, dadurch gekennzeichnet, daß sich in einem Tauchrohr das elektrische Heizelement und innen oder außen am Tauchrohr der Temperaturfühler befindet. 2. Electric heater according to claim 1 in the function as immersion heater characterized in that the electrical heating element and inside or outside of the immersion tube of the temperature sensor located. 3. Heizgerät nach Anspruch 1 oder 2, gekennzeichnet durch einen Thyristor als Kurzschlußschalter (3) 3. Heater according to claim 1 or 2, characterized by a thyristor as a short-circuit switch ( 3 ) 4. Heizgerät nach einem der Ansprüche 1 bis 3, gekennzeichnet durch einen Bimetallschalter oder ein Kontaktthermometer als Temperaturfühler (5) 4. Heater according to one of claims 1 to 3, characterized by a bimetal switch or a contact thermometer as a temperature sensor ( 5 ) 5. Heizgerät nach einem der Ansprüche 1 bis 4, gekennzeichnet durch einen die Meßergebnisse des Temperaturfühlers (5) verarbeitenden und den Thyristor (3) ansteuernde Steuerungselektronik. 5. Heater according to one of claims 1 to 4, characterized by one of the measurement results of the temperature sensor ( 5 ) processing and the thyristor ( 3 ) control electronics. 6. Heizgerät nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß als Überstromauslöser eine Sicherung (4) im Heizgerät (1) angeordnet ist. 6. Heater according to one of claims 1 to 5, characterized in that a fuse ( 4 ) in the heater ( 1 ) is arranged as an overcurrent release. 7. Heizgerät nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß als Überstromauslöser die Sicherung (4) extern in der Zuleitung oder in einem Schaltschrank angeordnet ist. 7. Heater according to one of claims 1 to 5, characterized in that the fuse ( 4 ) is arranged externally in the supply line or in a control cabinet as an overcurrent release.
DE2002123032 2002-05-22 2002-05-22 Electric heating device e.g. for immersing bath, has short-circuit switch connected across heating element and excess current trip in front of short-circuit switch Ceased DE10223032A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2002123032 DE10223032A1 (en) 2002-05-22 2002-05-22 Electric heating device e.g. for immersing bath, has short-circuit switch connected across heating element and excess current trip in front of short-circuit switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2002123032 DE10223032A1 (en) 2002-05-22 2002-05-22 Electric heating device e.g. for immersing bath, has short-circuit switch connected across heating element and excess current trip in front of short-circuit switch

Publications (1)

Publication Number Publication Date
DE10223032A1 true DE10223032A1 (en) 2003-12-11

Family

ID=29432262

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2002123032 Ceased DE10223032A1 (en) 2002-05-22 2002-05-22 Electric heating device e.g. for immersing bath, has short-circuit switch connected across heating element and excess current trip in front of short-circuit switch

Country Status (1)

Country Link
DE (1) DE10223032A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2003927C2 (en) * 2009-12-09 2011-06-14 Princess Household Appliances B V FRYER AND METHOD FOR FRYING FOOD.
DE202013001121U1 (en) 2013-02-05 2013-02-20 Leo Röckert Bath heating device for heating a galvanic bath
DE102013001964A1 (en) 2013-02-05 2014-08-07 Leo Röckert Device, used for heating galvanic bath e.g. lead bath, includes heatable immersion section, external level sensor, tamper-proof, additional temperature sensor for detection of temperature of immersion section, and evaluation switch device
GB2564127A (en) * 2017-07-04 2019-01-09 Eaton Intelligent Power Ltd Voltage transformer with overload protection

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19924279A1 (en) * 1999-05-27 2000-11-30 Aweco Appliance Sys Gmbh & Co Automatic power switching device for coffee machine has temperature controlled bistable switch with electromagnetic coil for control of switch element

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19924279A1 (en) * 1999-05-27 2000-11-30 Aweco Appliance Sys Gmbh & Co Automatic power switching device for coffee machine has temperature controlled bistable switch with electromagnetic coil for control of switch element

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP 2000209768 A in Patent Abstracts of Japan *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2003927C2 (en) * 2009-12-09 2011-06-14 Princess Household Appliances B V FRYER AND METHOD FOR FRYING FOOD.
DE202013001121U1 (en) 2013-02-05 2013-02-20 Leo Röckert Bath heating device for heating a galvanic bath
DE102013001964A1 (en) 2013-02-05 2014-08-07 Leo Röckert Device, used for heating galvanic bath e.g. lead bath, includes heatable immersion section, external level sensor, tamper-proof, additional temperature sensor for detection of temperature of immersion section, and evaluation switch device
GB2564127A (en) * 2017-07-04 2019-01-09 Eaton Intelligent Power Ltd Voltage transformer with overload protection

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8131 Rejection