[go: up one dir, main page]

EP1101068A1 - Baking oven with temperature sensor - Google Patents

Baking oven with temperature sensor

Info

Publication number
EP1101068A1
EP1101068A1 EP99938367A EP99938367A EP1101068A1 EP 1101068 A1 EP1101068 A1 EP 1101068A1 EP 99938367 A EP99938367 A EP 99938367A EP 99938367 A EP99938367 A EP 99938367A EP 1101068 A1 EP1101068 A1 EP 1101068A1
Authority
EP
European Patent Office
Prior art keywords
temperature sensor
sensor
sensor tube
radiator
tube
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.)
Withdrawn
Application number
EP99938367A
Other languages
German (de)
French (fr)
Inventor
Josef Wurm
Peter Mallinger
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1101068A1 publication Critical patent/EP1101068A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations

Definitions

  • the present invention relates to an oven with a cooking space in which a tubular, multi-curved radiant heater is held in a substantially horizontally extending radiator plane, and with a temperature sensor for regulating the cooking space temperature, the sensor tube for thermal coupling to the radiant heater in the same Is arranged close, and a suitably trained temperature sensor
  • Such an oven is known from the document DE 195 44 908 A1, an outer and an inner heating element with different stabilizing bars being held in the ceiling area of the cooking space of the oven on a heating element flange.
  • there is a straight element in the heating element flange between two straight starting sections of the inner grill element Temperature protection sensor tube held In order to reproducibly regulate the cooking space temperature and to achieve this for a large number of pieces of oven, the thermal coupling of the temperature sensor to the radiator, in particular its relative position to one another, must be carefully observed
  • the coupling length between the temperature sensor and the radiant heater of a baking oven be determined by appropriate choice of the position of the transition point between the resistance coil and the straight connecting section of the radiant heater in the area along the straight temperature sensor
  • the object of the present invention is to improve the thermal coupling of the temperature sensor to the radiant heater in an oven according to the preamble of claim 1
  • a temperature sensor is held in the sensor tube with flexible supply lines, that the temperature sensor is arranged essentially in the radiator level and that the sensor tube has at least one curved section, as a result of which the sensor tube bends around the radiator section.
  • This makes it possible to place the temperature sensor at locations in the radiator plane that were previously not accessible due to the straight sensor tubes.
  • the parallel placement of the straight tube which is particularly critical with respect to manufacturing tolerances
  • the temperature sensor for a straight radiator section can be omitted. Due to the control-technically robust arrangement possibilities of the temperature sensor according to the invention, complex final tests of the control properties of the oven can be dispensed with. It is particularly advantageous if the conventional capillary tube sensors are replaced by measuring resistors with flexible electrical leads, which in the probe tube are supported
  • the curved sensor tube makes it possible to place the temperature sensor at any point in the radiator level at suitable locations within the radiant heater
  • the probe tube and the radiant heater are advantageously held at the same height in the cooking space. A too strong thermal coupling of the temperature sensor to the ceiling of the cooking space is therefore definitely excluded
  • the temperature sensor is arranged approximately in the center of gravity of a measuring surface which lies in the radiator plane and which is essentially surrounded by radiator sections.
  • a measuring surface which lies in the radiator plane and which is essentially surrounded by radiator sections.
  • Such an arrangement of the temperature sensor has proven to be particularly robust. This means that slight positional deviations of the temperature sensor in the The measuring surface has hardly any influence on the control behavior of the oven.
  • the control coupling of the temperature sensor to the radiant heater is distinguished by a suitable choice of the measuring surface for all operating modes
  • the curved section of the sensor tube is spaced from the steel heating element to form an air gap in such a way that no direct heat conduction from the radiation heating element to the sensor tube can take place
  • FIG. 1 shows a perspective front view in sections of the cooking space of the oven according to the first exemplary embodiment
  • Fig. 2 is a perspective view on an enlarged scale, the radiant heater and the temperature sensor with wall sections of the cooking space of the oven according to the second embodiment
  • a known oven has, according to FIG. 1, a cuboid-shaped cooking chamber 1 which can be closed on the front side and which can be closed at the front by a hinged oven door (not shown).
  • a top wall 3 of the cooking chamber 1 there is a two-part unit known per se
  • Upper heat or radiator 5 is held, which extends almost over the entire surface of the top wall 3.
  • the radiant heater 5 is arranged parallel to the top wall 3 at a short distance immediately below it.
  • two fastening rods 7 held on the top wall 3 serve to hold the radiant heater 5 , which at the same time give the radiant heater 5 the required mechanical stability.
  • the radiant heater 5 is fastened in a rear wall 11 of the cooking space 1 by means of a plate-shaped radiator flange 13.
  • Tubular end sections of the radiant heater 5 extend through en Appropriate openings of the Bankkorperflansches 13 from the cooking space 1 There they are placed in a known manner via a switch and control unit of the oven, not shown, according to the control requirements for mains voltage.
  • the multi-curved two-part tubular heater 5 extends in a radiator level 15, which is just below the top wall 3 runs parallel to this
  • the measuring surface 17 is essentially surrounded on all sides by different radiator sections 19.
  • a thermally conductive sensor tube 21 at the same height as the two-part upper heat radiator 5
  • This has a curved section 22, as a result of which the sensor tube 21 initially extends essentially parallel to the tubular heater 5 in the radiator plane 15 in order to curve with increasing distance from the radiator flange 13 by an approximately right-angled bend of the tubular heater 5 into the measuring surface 17
  • a platinum 500 temperature measuring Resistor 23 is arranged approximately in the center of gravity of the measuring surface 17. This is much shorter than the sensor tube 21 itself.
  • the coupling of the measuring resistor 23 to the radiant heater 5 and to other heat sources in the cooking space 1 is excellent, such as, for example, additional heating elements or that in the cooking space 1 arranged food moreover, slight deviations in the position of the measuring resistor 23 within the measuring surface 17 have hardly any adverse effects on the control behavior of the oven.
  • the sensor tube is held on one of the fastening rods 7.
  • the measuring resistor 23 has flexible electrical connections Supply lines 25 connected, which are led through the sensor tube 21 in the area of the heater flange 13 from the cooking space 1 of the oven.
  • the temperature sensor 23 with the supply lines 25 is inserted into the sensor tube 21 until the temperature sensor sensor 23 abuts the closed free end of the sensor tube 21. A necessary strain relief is then ensured by means of a temperature-resistant adhesive in the sensor tube 21.
  • the supply lines 25 are connected to the control unit of the oven for regulating the oven temperature (not shown)
  • a one-piece, multiply curved, tubular top heat radiator 35 is held below a top wall 33 of a cooking space of an oven, which is not shown in detail.
  • Fastening rod 37 is used to hold and stabilize the radiator 35 for holding the top heat radiator 35 on the top wall 33 of the cooking space and on the other holding tabs 39 for holding and stabilizing the tubular heating element 35
  • the tubular heating element 35 is held in a rear wall 41 of the cooking space by means of a plate-shaped heating element flange 43.
  • the upper heat radiator 35 spans a heating element level 45 which extends essentially parallel to the top wall 33 of the cooking space of the oven in the heating element plane 45, a measuring surface 47 is shown with broken lines.
  • the measuring surface 47 is essentially delimited on all sides by radiator sections 49 of the upper heat radiator 35.
  • a sensor tube 51 is held in the radiator flange 43 and by means of a corresponding flange opening through the rear wall 41 led out of the cooking space Since the upper heat radiator 35 extends between the heater flange 43 and the measuring surface 47, the sensor tube 51 has a curved section 52.
  • temperature measuring resistor 53 is arranged essentially in the measuring surface 47.
  • the temperature sensor 53 is arranged approximately in the center of gravity of the measuring surface 47 in the radiator plane 45. This measuring point has proven to be particularly favorable with regard to the control behavior of the oven.
  • the coupling of the sensor 53 in the measuring surface 47 to the upper heat heater 35 is good enough, on the one hand, to be able to provide a quick control behavior, and, on the other hand, relatively insensitive to small deviations in position of the temperature sensor 53 within the measuring surface 47.
  • the end section of the sensor 51 is fastened to the fastening rod 37 and thus to the upper heat heater 35 with the aid of a holding tab 39.
  • the curvature section 52 is formed such that the sensor tube 51 does not touch the upper heat heater 35 over its entire length.
  • Electrical supply lines 55 of the temperature sensor 53 are led out of the cooking space through the sensor tube 51 and connected to a corresponding control unit of the oven for regulating the cooking space temperature (not shown).
  • a second temperature sensor 57 is stably held in the radiator flange 53 parallel to a rectilinear section of the upper heat radiator 35.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

Baking ovens are known which comprise a baking chamber (1) in which a tubular radiator element (5) having multiple bends is mounted in a horizontal radiator element plane (15), as well as a temperature sensor (25, 53) for adjusting the baking chamber temperature, whose sensor tube (21, 51) is arranged near the radiator element (5) to create a heat-conducting bond with same. To obtain a good bond between the temperature sensor (25, 53) and the radiator element, a temperature sensor (25, 53) with flexible feed lines (25, 55) is mounted in the sensor tube (21, 51), the temperature sensor (25, 53) is positioned substantially in the radiator element plane (15) and the sensor tube (21, 51) has at least one bent section (22, 52) so that said sensor tube (21, 51) curves around the radiator section.

Description

Backofen mit Temperaturfühler Oven with temperature sensor
Die vorliegende Erfindung betrifft einen Backofen mit einem Garraum, in dem ein rohrfor- miger, mehrfach gebogener Strahlungsheizkorper in einer sich im wesentlichen horizontal erstreckenden Heizkorperebene gehaltert ist, und mit einem Temperaturfühler zur Regelung der Garraumtemperatur, dessen Fuhlerrohr zur thermischen Kopplung an den Strahlungsheizkorper in dessen Nahe angeordnet ist, und einen entsprechend ausgebildeten TemperaturfühlerThe present invention relates to an oven with a cooking space in which a tubular, multi-curved radiant heater is held in a substantially horizontally extending radiator plane, and with a temperature sensor for regulating the cooking space temperature, the sensor tube for thermal coupling to the radiant heater in the same Is arranged close, and a suitably trained temperature sensor
Ein derartiger Backofen ist bekannt aus der Druckschrift DE 195 44 908 A1 , wobei an einem Heizkorperflansch ein äußerer und ein innerer Gπllheizkorper mit verschiedenen Stabilisie- rungstaben im Deckenbereich des Garraumes des Backofens gehaltert ist Zudem ist im Heizkorperflansch zwischen zwei geraden Anfangsabschnitten des inneren Grillheizkorpers ein gerades Temperaturschutz-Fuhlerrohr gehaltert Um eine ansprechende Regelung der Garraumtemperatur reproduzierbar und für eine große Stuckzahl von Backofen zu erreichen, ist die thermische Kopplung des Temperaturfühlers an den Heizkörper, also insbesondere deren relative Lage zueinander, genau zu beachtenSuch an oven is known from the document DE 195 44 908 A1, an outer and an inner heating element with different stabilizing bars being held in the ceiling area of the cooking space of the oven on a heating element flange. In addition, there is a straight element in the heating element flange between two straight starting sections of the inner grill element Temperature protection sensor tube held In order to reproducibly regulate the cooking space temperature and to achieve this for a large number of pieces of oven, the thermal coupling of the temperature sensor to the radiator, in particular its relative position to one another, must be carefully observed
In der Druckschrift DE 34 42 848 C2 wird vorgeschlagen, daß die Festlegung der Ankop- plungslange zwischen dem Temperaturfühler und dem Strahlungsheizkorper eines Backofens durch entsprechende Wahl der Lage der Übergangsstelle zwischen der Widerstandswendel und geradem Anschlußabschnitt des Strahlungsheizkorpers im Bereich längs des geraden Temperaturfühlers erfolgtIn the document DE 34 42 848 C2 it is proposed that the coupling length between the temperature sensor and the radiant heater of a baking oven be determined by appropriate choice of the position of the transition point between the resistance coil and the straight connecting section of the radiant heater in the area along the straight temperature sensor
Aufgabe der vorliegenden Erfindung ist es, bei einem Backofen nach dem Oberbegriff des Patentanspruches 1 die thermische Kopplung des Temperaturfühlers an den Strahlungsheizkorper zu verbessernThe object of the present invention is to improve the thermal coupling of the temperature sensor to the radiant heater in an oven according to the preamble of claim 1
Erfindungsgemaß ist dies bei einem Backofen nach dem Oberbegriff des Patentanspruches 1 dadurch erreicht, daß in dem Fuhlerrohr ein Temperaturfühler mit flexiblen Zuleitungen gehaltert ist, daß der Temperaturfühler im wesentlichen in der Heizkorperebene angeordnet ist und daß das Fuhlerrohr zumindest einen Krummungsabschnitt aufweist, wodurch sich das Fuhlerrohr um den Heizkorperabschnitt krümmt Dadurch ist es möglich, den Temperaturfühler an Stellen in der Heizkorperebene zu plazieren, die bisher aufgrund der geraden Fuhlerrohre nicht erreichbar waren Die gegenüber Fertigungstoleranzen besonders kritische parallele Plazierung des geraden Temperaturfühlers zu einem geraden Heizkorperabschnitt kann entfallen Durch die regelungstechnisch robusten Anordnungsmoglichkeiten des erfin- dungsgemaßen Temperaturfühlers kann gegebenenfalls auf aufwendige Endprüfungen der Regelungseigenschaften des Backofens verzichtet werden Besonders gunstig ist es, wenn die herkömmlichen Kapillarrohrfuhler durch Meßwiderstande mit flexiblen elektrischen Zulei- tungen ersetzt sind, die in dem Fuhlerrohr gehaltert sindAccording to the invention this is achieved in an oven according to the preamble of claim 1 in that a temperature sensor is held in the sensor tube with flexible supply lines, that the temperature sensor is arranged essentially in the radiator level and that the sensor tube has at least one curved section, as a result of which the sensor tube bends around the radiator section.This makes it possible to place the temperature sensor at locations in the radiator plane that were previously not accessible due to the straight sensor tubes. The parallel placement of the straight tube, which is particularly critical with respect to manufacturing tolerances The temperature sensor for a straight radiator section can be omitted. Due to the control-technically robust arrangement possibilities of the temperature sensor according to the invention, complex final tests of the control properties of the oven can be dispensed with. It is particularly advantageous if the conventional capillary tube sensors are replaced by measuring resistors with flexible electrical leads, which in the probe tube are supported
Besonders kompakt und montagetechnisch einfach ist es, wenn das Fuhlerrohr und der Strahlungsheizkorper zusammen an einem Heizkorperflansch gehaltert sind Trotz der gemeinsamen Halterung ist es aufgrund des gekrümmten Fuhlerrohres möglich, den Temperaturfuhler an beliebigen Punkten in der Heizkorperebene an geeigneten Orten innerhalb des Strahlungsheizkorpers zu plazierenIt is particularly compact and easy to assemble if the sensor tube and the radiant heater are held together on a radiator flange.Thanks to the common holder, the curved sensor tube makes it possible to place the temperature sensor at any point in the radiator level at suitable locations within the radiant heater
Um das Fuhlerrohr nicht zu nahe am Deckenbereich des Backofens plazieren zu müssen, sind das Fuhlerrohr und der Strahlungsheizkorper in vorteilhafter Weise auf der gleichen Hohe in dem Garraum gehaltert Eine zu starke thermische Kopplung des Temperaturfühlers an die Garraumdecke ist damit sicher ausgeschlossenIn order not to have to place the probe tube too close to the ceiling area of the oven, the probe tube and the radiant heater are advantageously held at the same height in the cooking space. A too strong thermal coupling of the temperature sensor to the ceiling of the cooking space is therefore definitely excluded
Gemäß einer bevorzugten Ausfuhrungsform ist der Temperaturfühler etwa im Schwerpunkt einer Meßflache angeordnet, die in der Heizkorperebene liegt und die im wesentlichen um- geben ist durch Heizkorperabschnitte Eine derartige Anordnung des Temperaturfühlers hat sich als besonders robust erwiesen Dies bedeutet, daß geringe Positionsabweichungen des Temperaturfühlers in der Meßflache kaum einen Einfluß auf das regelungstechnische Verhalten des Backofen ausüben Zudem ist durch eine geeignete Wahl der Meßflache die regelungstechnische Kopplung des Temperaturfühlers an den Strahlungsheizkorper für alle Betriebsarten ausgezeichnetAccording to a preferred embodiment, the temperature sensor is arranged approximately in the center of gravity of a measuring surface which lies in the radiator plane and which is essentially surrounded by radiator sections. Such an arrangement of the temperature sensor has proven to be particularly robust. This means that slight positional deviations of the temperature sensor in the The measuring surface has hardly any influence on the control behavior of the oven. In addition, the control coupling of the temperature sensor to the radiant heater is distinguished by a suitable choice of the measuring surface for all operating modes
Um das Regelungsverhalten des Backofens nicht zu beeinträchtigen, ist der Krummungsabschnitt des Fuhlerrohres von dem Stahlungsheizkorper derart unter Bildung eines Luftspaltes beabstandet, daß keine direkte Warmeleitung vom Strahlungsheizkorper auf das Fuhlerrohr erfolgen kann Nachfolgend sind anhand schematischer Darstellungen zwei Ausfuhrungsbeispieie des erfindungsgemaßen Backofens bzw Temperaturfühlers beschrieben Es zeigenIn order not to impair the control behavior of the oven, the curved section of the sensor tube is spaced from the steel heating element to form an air gap in such a way that no direct heat conduction from the radiation heating element to the sensor tube can take place Two exemplary embodiments of the baking oven or temperature sensor according to the invention are described below with the aid of schematic representations
Fig 1 in einer perspektivischen Frontansicht abschnittsweise den Garraum des Backofens gemäß dem ersten Ausfuhrungsbeispiel und1 shows a perspective front view in sections of the cooking space of the oven according to the first exemplary embodiment and
Fig 2 in perspektivischer Ansicht in vergrößertem Maßstab den Strahlungsheizkorper und den Temperaturfühler mit Wandabschnitten des Garraums des Backofens gemäß dem zweiten AusfuhrungsbeispielFig. 2 is a perspective view on an enlarged scale, the radiant heater and the temperature sensor with wall sections of the cooking space of the oven according to the second embodiment
Ein nicht naher dargestellter an sich bekannter Backofen weist gemäß Fig 1 einen front- seitig verschließbaren quaderformigen Garraum 1 auf, der frontseitig durch eine angelenkte Backofentur (nicht gezeigt) verschließbar ist Unmittelbar unterhalb einer Deckwand 3 des Garraums 1 ist in diesem ein an sich bekannter zweiteiliger Oberhitze- bzw Gπllheizkorper 5 gehaltert, der sich nahezu über die gesamte Flache der Deckwand 3 erstreckt Der Strahlungsheizkorper 5 ist dabei parallel zur Deckwand 3 mit geringem Abstand unmittelbar unterhalb dieser angeordnet Zur Halterung des Strahlungsheizkorpers 5 dienen zum einen zwei an der Deckwand 3 gehalterte Befestigungsstabe 7, die dem Strahlungsheizkorper 5 zugleich die erforderliche mechanische Stabilität verleihen Zum anderen ist der Strahlungs- heizkorper 5 in einer Ruckwand 11 des Garraums 1 mittels eines plattenformigen Heiz- korperflansches 13 befestigt Dabei erstrecken sich rohrformige Endabschnitte des Strahlungsheizkorpers 5 durch entsprechende Öffnungen des Heizkorperflansches 13 aus dem Garraum 1 Dort sind sie in an sich bekannter Weise über eine nicht gezeigte Schalt- und Steuereinheit des Backofens entsprechend den regelungstechnischen Bedurfnissen an Netzspannung gelegt Der mehrfach gebogene zweiteilige Rohrheizkorper 5 erstreckt sich in einer Heizkorperebene 15, die knapp unterhalb der Deckwand 3 parallel zu dieser verlauftA known oven, not shown in more detail, has, according to FIG. 1, a cuboid-shaped cooking chamber 1 which can be closed on the front side and which can be closed at the front by a hinged oven door (not shown). Immediately below a top wall 3 of the cooking chamber 1 there is a two-part unit known per se Upper heat or radiator 5 is held, which extends almost over the entire surface of the top wall 3. The radiant heater 5 is arranged parallel to the top wall 3 at a short distance immediately below it. On the one hand, two fastening rods 7 held on the top wall 3 serve to hold the radiant heater 5 , which at the same time give the radiant heater 5 the required mechanical stability. On the other hand, the radiant heater 5 is fastened in a rear wall 11 of the cooking space 1 by means of a plate-shaped radiator flange 13. Tubular end sections of the radiant heater 5 extend through en Appropriate openings of the Heizkorperflansches 13 from the cooking space 1 There they are placed in a known manner via a switch and control unit of the oven, not shown, according to the control requirements for mains voltage. The multi-curved two-part tubular heater 5 extends in a radiator level 15, which is just below the top wall 3 runs parallel to this
Mit einer unterbrochenen Linie ist in Fig 1 eine begrenzte Meßflache 17 in der Heizkorperebene 15 bezeichnet Die Meßflache 17 in im wesentlichen allseitig von verschiedenen Heiz- korperabschnitten 19 umgeben Im Heizkorperflansch 13 ist weiterhin auf der gleichen Hohe wie der zweiteilige Oberhitzeheizkorper 5 ein thermisch leitendes Fuhlerrohr 21 gehaltert Dieses weist einen Krummungsabschnitt 22 auf, wodurch sich das Fuhlerrohr 21 zunächst im wesentlichen parallel zum Rohrheizkorper 5 in der Heizkorperebene 15 erstreckt, um sich mit zunehmendem Abstand vom Heizkorperflansch 13 um eine etwa rechtwinklige Ab- biegung des Rohrheizkorpers 5 in die Meßflache 17 zu krummen Im Bereich des freien Endabschnittes des Fuhlerrohres 21 ist in dessem Inneren ein Platιn-500-Temperaturmeß- widerstand 23 etwa im Schwerpunkt der Meßflache 17 angeordnet Dieser ist wesentlich kurzer ausgebildet als das Fuhlerrohr 21 selbst An dieser Meßstelle ist die Kopplung des Meßwiderstandes 23 an den Strahlungsheizkorper 5 und an sonstige Wärmequellen im Garraum 1 ausgezeichnet, wie beispielsweise vorhandene Zusatzheizkorper oder das im Garraum 1 angeordnete Gargut Außerdem haben geringe Abweichungen der Lage des Meßwiderstandes 23 innerhalb der Meßflache 17 kaum nachteilige Auswirkungen auf das Regelungsverhalten des Backofens Zur Festlegung der Lage des Fuhlerrohres 21 insbesondere wahrend des Garbetriebes ist das Fuhlerrohr an einem der Befestigungsstabe 7 gehaltert An den Meßwiderstand 23 sind flexible elektrische Zuleitungen 25 angeschlossen, die durch das Fuhlerrohr 21 im Bereich des Heizkorperflansches 13 aus dem Garraum 1 des Backofens gefuhrt sind Bei der Montage wird der Temperatursensor 23 mit den Zuleitungen 25 in das Fuhlerrohr 21 eingeschoben, bis der Temperaturfühler 23 am geschlossenen freien Ende des Fuhlerrohrs 21 anstoßt Eine erforderliche Zugentlastung wird anschließend mittels eines temperaturbeständigen Klebers im Fühlerrohr 21 sichergestellt Die Zuleitungen 25 sind mit der Steuereinheit des Backofens zur Regelung der Backofentemperatur verbunden (nicht gezeigt)1 with a broken line denotes a limited measuring surface 17 in the radiator plane 15. The measuring surface 17 is essentially surrounded on all sides by different radiator sections 19. In the radiator flange 13 there is also a thermally conductive sensor tube 21 at the same height as the two-part upper heat radiator 5 This has a curved section 22, as a result of which the sensor tube 21 initially extends essentially parallel to the tubular heater 5 in the radiator plane 15 in order to curve with increasing distance from the radiator flange 13 by an approximately right-angled bend of the tubular heater 5 into the measuring surface 17 In the area of the free end section of the sensor tube 21, a platinum 500 temperature measuring Resistor 23 is arranged approximately in the center of gravity of the measuring surface 17. This is much shorter than the sensor tube 21 itself. At this measuring point, the coupling of the measuring resistor 23 to the radiant heater 5 and to other heat sources in the cooking space 1 is excellent, such as, for example, additional heating elements or that in the cooking space 1 arranged food moreover, slight deviations in the position of the measuring resistor 23 within the measuring surface 17 have hardly any adverse effects on the control behavior of the oven. To determine the position of the sensor tube 21, especially during cooking, the sensor tube is held on one of the fastening rods 7. The measuring resistor 23 has flexible electrical connections Supply lines 25 connected, which are led through the sensor tube 21 in the area of the heater flange 13 from the cooking space 1 of the oven. During assembly, the temperature sensor 23 with the supply lines 25 is inserted into the sensor tube 21 until the temperature sensor sensor 23 abuts the closed free end of the sensor tube 21. A necessary strain relief is then ensured by means of a temperature-resistant adhesive in the sensor tube 21. The supply lines 25 are connected to the control unit of the oven for regulating the oven temperature (not shown)
Gemäß dem zweiten Ausfuhrungsbeispiel nach Fig 2 ist analog dem ersten Ausfuhrungsbeispiel unterhalb einer Deckwand 33 eines nicht naher gezeigten Garraums eines Back- ofens ein einteiliger mehrfach gebogener, rohrformiger Oberhitzeheizkorper 35 gehaltert Zur Halterung und Stabilisierung des Heizkörpers 35 dienen Befestigungsstabe 37 Diese weisen zum einen Befestigungsoffnungen 38 zur Halterung des Oberhitzeheizkorpers 35 an der Deckwand 33 des Garraums auf und zum anderen Haltelaschen 39 zur Halterung und Stabilisierung des Rohrheizkorpers 35 Der Rohrheizkorper 35 ist in einer Ruckwand 41 des Garraums mittels eines plattenformigen Heizkorperflansches 43 gehaltert Durch entsprechende Öffnungen des Heizkorperflansches 43 ragen Endabschnitte des Oberhitzeheizkorpers 35 mit elektrischen Anschlußmitteln aus dem Garraum Der Oberhitzeheizkorper 35 spannt eine Heizkorperebene 45 auf, die sich im wesentlichen parallel zur Deckwand 33 des Garraums des Backofens erstreckt In der Heizkorperebene 45 ist mit unterbrochenen Linien eine Meßflache 47 gezeigt Die Meßflache 47 ist im wesentlichen allseitig von Heizkorperabschnitten 49 des Oberhitzeheizkorpers 35 begrenzt Auf gleicher Hohe mit dem Oberhitzeheizkorper 35 ist in dem Heizkorperflansch 43 ein Fuhlerrohr 51 gehaltert und mit Hilfe einer entsprechenden Flanschoffnung durch die Ruckwand 41 aus dem Garraum gefuhrt Da sich zwischen dem Heizkorperflansch 43 und der Meßflache 47 der Ober- hitzeheizkorper 35 erstreckt, weist das Fuhlerrohr 51 einen Krummungsabschnitt 52 auf Dadurch ist es möglich daß ein im Endbereich des Fuhlerrohres 51 angeordneter Platin- 500-Temperaturmeßwiderstand 53 im wesentlichen in der Meßfläche 47 angeordnet ist. Der Temperaturfühler 53 ist etwa im Schwerpunkt der Meßfläche 47 in der Heizkörperebene 45 angeordnet. Dieser Meßort hat sich bezüglich des Regelungsverhaltens des Backofens als besonders günstig erwiesen. Die Ankopplung des Meßfühlers 53 in der Meßfläche 47 an den Oberhitzeheizkorper 35 ist einerseits gut genug, um ein schnelles Regelungsverhalten bereitstellen zu können, und andererseits gegenüber kleinen Lageabweichungen des Temperaturfühlers 53 innerhalb der Meßfläche 47 relativ unempfindlich. Um den Ort des Platin-500-Messfühlers 53 in der Meßfläche 47 während des Betriebes des Backofens definiert gewährleisten zu können, ist der Endabschnitt des Fühlers 51 mit Hilfe einer Haltelasche 39 am Befestigungsstab 37 und damit am Oberhitzeheizkorper 35 befestigt. Zudem ist der Krümmungsabschnitt 52 derart ausgebildet, daß das Fühlerrohr 51 über dessen gesamte Länge den Oberhitzeheizkorper 35 nicht berührt. Elektrische Zuleitungen 55 des Temperaturfühlers 53 sind durch das Fühlerrohr 51 aus dem Garraum geführt und an eine entsprechende Steuerungseinheit des Backofens zur Regelung der Garraumtemperatur angeschlossen (nicht gezeigt). Insbesondere für einen möglichen Selbstreinigungsbetrieb ist in dem Heizkörperflansch 53 parallel zu einem geradlinigen Abschnitt des Oberhitzeheizkorpers 35 an diesem ein zweiter Temperaturfühler 57 stabil gehaltert. According to the second exemplary embodiment according to FIG. 2, analogously to the first exemplary embodiment, a one-piece, multiply curved, tubular top heat radiator 35 is held below a top wall 33 of a cooking space of an oven, which is not shown in detail. Fastening rod 37 is used to hold and stabilize the radiator 35 for holding the top heat radiator 35 on the top wall 33 of the cooking space and on the other holding tabs 39 for holding and stabilizing the tubular heating element 35 The tubular heating element 35 is held in a rear wall 41 of the cooking space by means of a plate-shaped heating element flange 43. End sections of the upper heating element protrude through corresponding openings in the heating element flange 43 35 with electrical connection means from the cooking space The upper heat radiator 35 spans a heating element level 45 which extends essentially parallel to the top wall 33 of the cooking space of the oven in the heating element plane 45, a measuring surface 47 is shown with broken lines. The measuring surface 47 is essentially delimited on all sides by radiator sections 49 of the upper heat radiator 35. At the same height as the upper heat radiator 35, a sensor tube 51 is held in the radiator flange 43 and by means of a corresponding flange opening through the rear wall 41 led out of the cooking space Since the upper heat radiator 35 extends between the heater flange 43 and the measuring surface 47, the sensor tube 51 has a curved section 52. This makes it possible for a platinum arranged in the end region of the sensor tube 51 500 temperature measuring resistor 53 is arranged essentially in the measuring surface 47. The temperature sensor 53 is arranged approximately in the center of gravity of the measuring surface 47 in the radiator plane 45. This measuring point has proven to be particularly favorable with regard to the control behavior of the oven. The coupling of the sensor 53 in the measuring surface 47 to the upper heat heater 35 is good enough, on the one hand, to be able to provide a quick control behavior, and, on the other hand, relatively insensitive to small deviations in position of the temperature sensor 53 within the measuring surface 47. In order to be able to guarantee the location of the platinum 500 sensor 53 in the measuring surface 47 in a defined manner during operation of the oven, the end section of the sensor 51 is fastened to the fastening rod 37 and thus to the upper heat heater 35 with the aid of a holding tab 39. In addition, the curvature section 52 is formed such that the sensor tube 51 does not touch the upper heat heater 35 over its entire length. Electrical supply lines 55 of the temperature sensor 53 are led out of the cooking space through the sensor tube 51 and connected to a corresponding control unit of the oven for regulating the cooking space temperature (not shown). In particular for a possible self-cleaning operation, a second temperature sensor 57 is stably held in the radiator flange 53 parallel to a rectilinear section of the upper heat radiator 35.

Claims

Patentansprücheclaims
Backofen mit einem Garraum, in dem ein rohrformiger, mehrfach gebogenerOven with a cooking space in which a tubular, multi-curved
Strahlungsheizkorper in einer sich im wesentlichen horizontal erstreckenden Heizkorperebene gehaltert ist, und mit einem Temperaturfühler zur Regelung der Garraumtemperatur, dessen Fuhlerrohr zur thermischen Kopplung an den Strahlungsheizkorper in dessen Nahe angeordnet ist, d a d u r c h g e k e n n z e i c h n e t, d a ß in dem Fuhlerrohr (21 , 51) ein Temperaturfühler (23, 53) mit flexiblen Zuleitungen (25, 55) gehaltert ist, daß der Temperatur- fuhler (23, 53) im wesentlichen in der Heizkorperebene (15, 45) angeordnet ist, und daß das Fuhlerrohr (21 , 51 ) zumindest einen Krummungsabschnitt (22, 52) aufweist, wodurch sich das Fuhlerrohr (21 , 51) um den Heizkorperabschnitt krümmt (19, 49)Radiant heating element is held in a substantially horizontally extending heating element level, and with a temperature sensor for regulating the cooking space temperature, the sensor tube for thermal coupling to the radiation heater being arranged in the vicinity thereof, characterized in that a temperature sensor () in the sensor tube (21, 51) 23, 53) with flexible feed lines (25, 55) that the temperature sensor (23, 53) is arranged essentially in the radiator plane (15, 45) and that the sensor tube (21, 51) has at least one curved section (22, 52), whereby the sensor tube (21, 51) curves around the radiator section (19, 49)
Backofen nach Anspruch 1 , dadurch gekennzeichnet, daß das FuhlerrohrBaking oven according to claim 1, characterized in that the sensor tube
(21 , 51 ) und der Strahlungsheizkorper (5, 35) zusammen an einem Heizkorperflansch (13, 43) gehaltert sind(21, 51) and the radiant heater (5, 35) are held together on a heater flange (13, 43)
Backofen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Fuh- lerrohr (21 , 51 ) und der Strahlungsheizkorper (5, 35) auf der gleichen Hohe an der Ruckwand des Garraumes (1 ) gehaltert sindBaking oven according to claim 1 or 2, characterized in that the sensor tube (21, 51) and the radiant heater (5, 35) are held at the same height on the rear wall of the cooking space (1)
Backofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Temperaturfühler (23, 53) etwa im Schwerpunkt einer Meß- flache (17, 47) angeordnet ist, die in der Heizkorperebene (15, 45) liegt und die im wesentlichen umgeben ist durch Heizkorperabschnitte (19, 49)Baking oven according to one of the preceding claims, characterized in that the temperature sensor (23, 53) is arranged approximately in the center of gravity of a measuring surface (17, 47) which lies in the heating element plane (15, 45) and which is essentially surrounded by Radiator sections (19, 49)
Backofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Fuhlerrohr (21 , 51) im Krummungsabschnitt (22, 52) von dem Strahlungsheizkorper (5, 35) unter Bildung eines Luftspaltes beabstandet Temperaturfühler mit einem Fühlerrohr, dadurch gekennzeichnet, daß in dem Fühlerrohr (21 ; 51) ein Temperaturfühler (23; 53) mit flexiblen Zuleitungen (25; 55) gehaltert ist, und daß das Fuhlerrohr (21; 51) gekrümmt ausgebildet ist. Baking oven according to one of the preceding claims, characterized in that the sensor tube (21, 51) in the curved section (22, 52) is spaced from the radiant heater (5, 35) to form an air gap Temperature sensor with a sensor tube, characterized in that a temperature sensor (23; 53) with flexible feed lines (25; 55) is held in the sensor tube (21; 51), and that the sensor tube (21; 51) is curved.
EP99938367A 1998-07-31 1999-07-28 Baking oven with temperature sensor Withdrawn EP1101068A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19834644A DE19834644C1 (en) 1998-07-31 1998-07-31 Oven with temperature sensor
DE19834644 1998-07-31
PCT/EP1999/005418 WO2000008393A1 (en) 1998-07-31 1999-07-28 Baking oven with temperature sensor

Publications (1)

Publication Number Publication Date
EP1101068A1 true EP1101068A1 (en) 2001-05-23

Family

ID=7876041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99938367A Withdrawn EP1101068A1 (en) 1998-07-31 1999-07-28 Baking oven with temperature sensor

Country Status (4)

Country Link
US (1) US6437293B2 (en)
EP (1) EP1101068A1 (en)
DE (1) DE19834644C1 (en)
WO (1) WO2000008393A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005044696A1 (en) * 2005-09-19 2007-03-22 BSH Bosch und Siemens Hausgeräte GmbH High-level built-in cooking device, has muffle which encloses cooking chamber, and thermal functional unit detachably fastened at rear wall of muffle, where functional unit is formed by heater and/or temperature sensor
US7619182B2 (en) * 2006-01-08 2009-11-17 Whirlpool Corporation Warming drawer
US8247743B2 (en) * 2007-02-06 2012-08-21 Bsh Home Appliances Corporation Cooking appliance having a broiling element with loops of non-uniform length
DE102007043370B3 (en) * 2007-09-12 2008-09-25 Miele & Cie. Kg Home appliance, particularly baking oven, has treatment room, electrical controller and rod antenna that has elongated base body and rod antenna is fixed on front end of wall of treatment room by fixed bearing or clamping
TR201110501A2 (en) * 2011-10-21 2012-01-23 Vestel Beyaz Eşya Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇@ A cooking appliance.
FR2997497B1 (en) * 2012-10-25 2014-11-21 Univ Lorraine METHOD FOR MEASURING THE TEMPERATURE OF A WORKPIECE DURING A THERMOFORMING OPERATION
DE102014217630A1 (en) * 2014-09-03 2016-03-03 BSH Hausgeräte GmbH Sensor system for a cooking appliance
WO2023140805A1 (en) * 2022-01-03 2023-07-27 Femas Metal San. Ve Tic. A.S. Oven with a thermostat
WO2023224568A1 (en) * 2022-01-19 2023-11-23 Femas Metal San. Ve Tic. A.S. A cooking device with a heating element for a heating element

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511971A (en) * 1967-08-24 1970-05-12 Richard T Keating Temperature control
US3668371A (en) * 1971-06-16 1972-06-06 Gen Motors Corp Circuit arrangement for accelerated continuous cleaning of self cleaning oven coatings
DE2950946C2 (en) * 1979-12-18 1984-08-09 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Oven with fan and grill element
DE3246429C2 (en) * 1982-12-15 1985-08-29 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart oven
FR2559240B1 (en) * 1984-02-03 1986-05-30 Seb Sa PORTABLE COOKING APPLIANCE COMPRISING AN ENCLOSURE AND A COOKING PLATE
DE3442848C2 (en) * 1984-11-23 1987-02-05 Bosch-Siemens Hausgeraete Gmbh, 8000 Muenchen oven
DE3442812C1 (en) * 1984-11-23 1986-05-28 Bosch-Siemens Hausgeräte GmbH, 8000 München Oven with a fan fan
EP0306885A1 (en) * 1987-09-07 1989-03-15 Siemens Nixdorf Informationssysteme Aktiengesellschaft Temperature sensor for extreme environmental conditions
DE3904135C2 (en) * 1989-02-11 1994-06-23 Miele & Cie Baking and roasting oven
SE469857B (en) * 1992-02-07 1993-09-27 Electrolux Ab Temperature probe intended to be introduced into a food product to be heat treated and an oven for treating food products comprising a temperature probe
US5397873A (en) * 1993-08-23 1995-03-14 Emerson Electric Co. Electric hot plate with direct contact P.T.C. sensor
DE19505588C2 (en) * 1995-02-18 1998-09-17 Miele & Cie Temperature sensor arrangement for an oven
DE19544908C2 (en) * 1995-12-01 2000-07-06 Bsh Bosch Siemens Hausgeraete Barbecue with swiveling tubular heater
JP2956581B2 (en) * 1996-05-15 1999-10-04 本田工業株式会社 Fluid measurement probe
DE29611237U1 (en) * 1996-06-27 1996-09-05 Röckert, Leo, 91166 Georgensgmünd Portable temperature measuring device
JP3279275B2 (en) * 1999-01-07 2002-04-30 松下電器産業株式会社 Toaster oven

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0008393A1 *

Also Published As

Publication number Publication date
WO2000008393A1 (en) 2000-02-17
US20010020612A1 (en) 2001-09-13
US6437293B2 (en) 2002-08-20
DE19834644C1 (en) 2000-02-03

Similar Documents

Publication Publication Date Title
EP0141923A1 (en) Temperature limiter for a glass-ceramic cooking unit
DE19713796B4 (en) Electric cooker, especially deep fryer
EP1152639B1 (en) Electrical heating unit, particularly for liquid supports
WO2001062048A1 (en) Cooking surface comprising a temperature sensor
WO2000008393A1 (en) Baking oven with temperature sensor
DE4138817A1 (en) TEMPERATURE DETECTION DEVICE
DE3423085A1 (en) DEVICE FOR CONTROLLING OR LIMITATION OF AT LEAST ONE TEMPERATURE VALUE OR A TEMPERATURE RANGE OF RADIATION OR CONTACT HEATER
WO2001062049A1 (en) Cooking surface comprising a temperature sensor
EP1258170B1 (en) Cooking surface comprising a temperature sensor
DE3710387C2 (en)
DE3333645A1 (en) Temperature limiter for a glass-ceramic cooking unit
EP0927428A1 (en) Radiant heating element for a cooking area
DE60131255T2 (en) TEMPERATURE SENSOR
DE2614564C3 (en) Heater
EP0114307B1 (en) Temperature-regulating device for a heating apparatus
DE3219517C2 (en) Temperature control switch
DE3442848C2 (en) oven
EP1339260B1 (en) Temperature sensor
EP1260120A1 (en) Cooking surface comprising a temperature sensor
EP0399105A2 (en) Electrical cooking plate
DE4228769C2 (en) Oven with a temperature sensor for automatic roasting control
DE2806193C3 (en) Temperature sensors for thermal household appliances, in particular for baking ovens
EP0610588A2 (en) Oven muffle with a pivotally mounted heating element
EP0481355B1 (en) Switching mechanism with an apparatus for controlling the influence of ambient characteristics
EP0016893A1 (en) Soldering iron

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010228

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 20021113

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20030929