EP4118381A1 - Four avec unité de régulation de température - Google Patents

Four avec unité de régulation de température

Info

Publication number
EP4118381A1
EP4118381A1 EP20924875.6A EP20924875A EP4118381A1 EP 4118381 A1 EP4118381 A1 EP 4118381A1 EP 20924875 A EP20924875 A EP 20924875A EP 4118381 A1 EP4118381 A1 EP 4118381A1
Authority
EP
European Patent Office
Prior art keywords
temperature
cavity
oven according
conductive probe
oven
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.)
Pending
Application number
EP20924875.6A
Other languages
German (de)
English (en)
Other versions
EP4118381A4 (fr
Inventor
Mehmet Baris Gocer
Mustafa BOZTAS
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.)
Femas Metal Sanayi ve Ticaret AS
Original Assignee
Femas Metal Sanayi ve Ticaret AS
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 Femas Metal Sanayi ve Ticaret AS filed Critical Femas Metal Sanayi ve Ticaret AS
Publication of EP4118381A1 publication Critical patent/EP4118381A1/fr
Publication of EP4118381A4 publication Critical patent/EP4118381A4/fr
Pending 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
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/085—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on baking ovens

Definitions

  • the invention relates to a household oven with a temperature upper limit and lower limit control unit used for safety purposes.
  • Temperature sensors are used to control the internal oven temperature of the ovens.
  • internal oven temperature control is provided by a temperature sensor secured on the cavity of the oven or inside the oven.
  • the sensor transmits the required information to the control unit in accordance with the lower and upper limit temperatures with regard to a threshold value or provides the safe shut-down of the oven by means of a switch. Securing the sensor inside in such ovens may cause early malfunctions, and in ovens in which only one sensor is used, the function of determining the upper limit and lower limit values simultaneously may cause a malfunction after a while.
  • EP2775215B1 disclose an oven having a temperature sensor that senses a temperature of cooking space.
  • a controller controls a heating capacity of heating elements in order to control cooking temperature to desired temperature.
  • a climate sensor is arranged in opening of cooking space and temperature sensor is arranged outside the opening, such that heating capacity of heating elements is lowered with controller and the cooking space temperature falls below target temperature, when the temperature sensed by temperature sensor exceeds a threshold temperature.
  • the object of the invention is to ensure that a single compact assembly measuring the heat on the cavity of a household oven performs all the measurements required for the cooking operation.
  • the invention relates to an oven comprising a cavity defining a cooking chamber, and a heat insulating layer provided for surrounding an outer wall of the cavity.
  • the oven further comprises a hole which is provided on the heat insulating layer and a temperature measurement unit having a conductive probe extending inside the hole reaching the cavity from a distal end; a conductive bridge secured to temperature sensors from proximal end of the conductive probe in a heat transferrable manner and provided between a first temperature sensor and at least a second neighboring temperature sensor.
  • the first and second temperature sensors are positioned at close to each other on the conductive bridge element.
  • each temperature sensor can be set to a predetermined threshold temperature value defined for a specific cooking operation, when the determined threshold value is reached, it operates by transmitting this for example to an electronic control unit, or an external or internal switch unit.
  • the first temperature sensor can be set to measure the maximum temperature upper limit of the oven, while the second temperature sensor can be set to measure a lower limit value relative to the set cooking temperature.
  • the conductive probe is made of brass material. Thereby, the time for transmission of the temperature inside the oven to the temperature sensors through the conductive probe is faster.
  • brass instead of brass, it may preferred to use steel or other alloys that will provide the same conductive properties and have a heat resistance similar to brass.
  • the length of the conductive probe is substantially equal to the thickness of a heat insulating layer in which the hole is located.
  • heat insulating layer forms a barrier while the conductive probe transmits the heat and the transmission of the heat throughout is facilitated.
  • the diameter of the hole can be chosen equal to or greater than the diameter of the conductive probe. If chosen equal, while the heat insulating layer provides heat by also surrounding the conductive probe; if chosen grater, the installation of the conductive probe on the outer periphery of the heat insulating layer becomes easier.
  • connection element is provided at the proximal end of the conductive probe such that mounting to the cavity.
  • the conductive probe can be directly mounted in the cavity.
  • maintenance is facilitated by removing the conductive probe from the cavity when necessary.
  • the connection of the conductive probe to the cavity can be a welding seam.
  • the conductive bridge element is in form of a metal strip at one side the conductive probe is mounted and at the opposing other side the first and second temperature sensors are mounted. Thereby, the loss during temperature transmission is minimized and the temperature sensors are provided to give more accurate results. Also, the conductive probe provides heat transfer from one point to the temperature sensors.
  • the first and second temperature sensors are arranged sequentially. Thereby, a compact structure is obtained and also the negative effect of the measurement performance due to the temperature sensors interacting with each other is prevented.
  • the conductive bridge element is comprising a thoroughly formed hole and the distal end is having a narrowed section extending inside the hole (462). Thereby, it is ensured that the conductive probe is directly mounted to the bridge.
  • the extension can be partially or completely placed into the opening.
  • the first and second temperature sensors comprise mechanical thermostats.
  • both the temperature measurement is provided on the bridge and the power is turned off when the threshold values are reached.
  • an electronic temperature sensor can be used instead of a mechanical thermostat. In such a case, which type of action will be applied when the threshold temperature value is reached is determined by a switch or a control unit attached to the temperature sensors.
  • the first temperature sensor has a temperature upper limit value set at 50 °C and above.
  • the temperature inside the oven exceeds the upper limit value, it is directly transmitted to the control unit and thereby the cooling fan of the oven is enabled. When it falls below the set limit value, it stops the operation of the cooling fan.
  • the second temperature sensor will have a limit of 50°C in the range of 230-180°C. If the cooking chamber exceeds 230 °C and the operation of the cooling fan falls below 180 °C, it will ensured that the resistors are reactivated. Thereby, the temperature inside the oven is provided to fluctuate proximately to the set temperature.
  • the second temperature sensor has a temperature lower limit value set at 250 °C and below. Thereby, when the set temperature lower limit is reached, a safe shut-down of the oven is provided by means of the second temperature sensor.
  • an upper resistor and a lower resistor are provided in the cooking chamber.
  • the resistors ensure that the cooking chamber is heated by electric current.
  • magnetron and halogen heating elements can be used instead of resistors.
  • the conductive probe is arranged at a rear part of the cavity. Thereby, it prevents space occupation in the cooking chamber.
  • the conductive probe can extend in the cooking chamber or be mounted on the top, bottom or sides of the cavity.
  • the conductive probe is in the form of a rod.
  • the rod structure ensures that the distance between the cavity and the conductive bridge element carrying the temperature sensors is maintained.
  • Figure 1 shows a schematic cross-sectional view of a household oven comprising a representative embodiment of the temperature measurement unit of the invention.
  • Figure 2 shows a zoomed-in view of the temperature measurement unit of the oven given in figure 1.
  • FIG. 1 there is schematically shown an electrical oven with a temperature measurement unit (40) of the invention from one side.
  • a metal box-like cavity (10) delimits a cooking chamber (2).
  • An upper resistor (3) and a lower resistor (4) corresponding to the upper and lower parts of the cavity (10) are mounted on an inner wall (12).
  • the upper and lower resistors (3,4) are activated by means of the control elements (not shown) located on a control panel (6).
  • the control panel (6) carries a control unit (5).
  • the control unit (5) is in the form of an electronic control card and includes a processor and a memory unit.
  • a door (1) is hinged to the open outlet of the cavity (10) in such a way that it can be opened and closed. When the door (1) is closed, it covers the cooking chamber (2).
  • An outer wall (14) of the cavity (10) is covered with a heat insulating layer (20) made entirely of glass wool.
  • the heat insulating layer (20) is applied directly to the outer wall (14).
  • a hole (24) is drilled on an outer periphery (22) of the heat insulating layer (20), reaching up to the cavity (10).
  • the hole (24) is arranged in proximity to the upper corner of a rear part (16) in the outer wall (14) of the cavity (10).
  • the hole (24) is in a cylindrical form drilled on the heat insulating layer (20).
  • An opening (18) is drilled by cutting in the rear part (16) of the cavity (10), and the conductive probe (48) extends vertically from the rear part (16) of the cavity (10) perpendicularly to the outer wall (14).
  • the conductive probe (48) extends outward from the opening (18).
  • a connection element (49) such as nut is fixed to a distal end (482) in such a way that it rests against the inner wall (12) of the cavity (10). When the connection element (49) rests against the cavity (10), the conductive probe (48) is fixed outwardly from the outer wall (14).
  • a conductive bridge element (46) in the form of strip metal cut perpendicular to the conductive probe (48) is mounted at one proximal end (484) of the conductive probe (48)
  • An hole (462) is formed by making a hole through the conductive bridge element (46).
  • a tapered extension (486) is formed that fits into the hole (462) of the conductive bridge element (46), fixing it to the conductive bridge element (46).
  • the body length of the conductive probe (48) is equal to a width (H) of corresponding heat insulating layer.
  • the width of the heat insulating layer (20) is constant along the rear part (16).
  • a casing (30) covers the outer periphery (22) of the heat insulating layer (20) at a distance.
  • FIG 2 there is provided a zoomed-in view of the temperature measurement unit (40).
  • a first and a second temperature sensor (42, 44) in the form of a mechanical thermostat are mounted at a distance on the conductive bridge element (46).
  • An L-shaped tab (461) extending over the conductive bridge element (46) keeps the first and second temperature sensors (42, 44) fixed on the conductive bridge element (46) from its corresponding part.
  • the first temperature sensor (42) is placed on the conductive bridge element (46) in alignment with the conductive probe (48).
  • Each temperature sensor (42, 44) has a terminal end (43, 45) facing outward. Terminal ends (43, 45) transmit an electrical signal to the control unit (5) by means of a cable (50).
  • the user adjusts the cooking temperature by means of a control button (not shown) on the control panel (6).
  • the upper and lower resistors (3,4) are activated individually or in pairs, thereby heating the cooking chamber (2).
  • the conductive probe (48) transfers the heat to the conductive bridge element (46) through heat conduction.
  • the first temperature sensor (42) is set with an upper limit of 50 °C.
  • a cooling fan (not shown) is activated by the control unit (5) when the temperature of the cooking chamber (2) exceeds the set 50 °C limit due to any malfunction during cooking.
  • the cooling fan is activated when the temperature rises to 230 °C, when the temperature drops to 160 °C, the switch on the first temperature sensor (42) is triggered, thereby instructing the resistors (3,4) to be activated.
  • the second temperature sensor (44) is configured such that the set temperature of the cooking chamber (2) is activated according to its safe lower limit. When the temperature of the cooking chamber (2) reaches 250°C, the switch on the second temperature sensor (44) is triggered, thereby giving an instruction to cut the power sent via the control unit (5) or directly to the resistors (3,4).
  • both the lower temperature for safety purposes and the upper temperature limit maintaining the temperature of the cooking chamber (2) in the cooking operation at the same time can be controlled by temperature sensors (42, 44) arranged on the single conductive bridge element (46) and in case of exceeding the limit, action can be taken according to the determined scenario by comparing the predetermined values and the current temperature measured by the temperature sensors (42, 44) instantly at the same time.
  • Control Panel 46 Conductive Bridge Element Cavity 461 Tab Inner Wall 462 Opening Outer Wall 48 Conductive Probe Rear Part 482 Distal End Opening 484 Proximal End Heat Insulating Layer 486 Extension Outer Periphery 49 Connection Element Hole 50 Cable Casing H Thickness of the Insulating Layer

Landscapes

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

Abstract

L'invention concerne un four comprenant une cavité (10) qui définit une chambre de cuisson (2), et une couche d'isolation thermique (20) prévue pour entourer une paroi externe (14) de la cavité (10). Le four comprend en outre un trou (24) disposé sur la couche d'isolation thermique (20) et une unité de mesure de température (40) pourvue d'une sonde conductrice (48) qui s'étend à l'intérieur du trou (24) pour atteindre la cavité (10) à partir d'une extrémité distale (482) ; un pont conducteur (46) fixé à des capteurs de température (42, 44) à partir d'une extrémité proximale (484) de la sonde conductrice (48) d'une manière qui permet le transfert de la chaleur et qui est disposé entre un premier capteur de température (42) et au moins un deuxième capteur de température voisin (44).
EP20924875.6A 2020-03-13 2020-03-13 Four avec unité de régulation de température Pending EP4118381A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2020/050203 WO2021183068A1 (fr) 2020-03-13 2020-03-13 Four avec unité de régulation de température

Publications (2)

Publication Number Publication Date
EP4118381A1 true EP4118381A1 (fr) 2023-01-18
EP4118381A4 EP4118381A4 (fr) 2023-11-22

Family

ID=77670773

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20924875.6A Pending EP4118381A4 (fr) 2020-03-13 2020-03-13 Four avec unité de régulation de température

Country Status (2)

Country Link
EP (1) EP4118381A4 (fr)
WO (1) WO2021183068A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112008002697T5 (de) * 2007-10-09 2010-09-23 Apc, Inc. Temperatursteuerung für ein GArgerät mit einem Kombinations-Heizsystem
EP2445311B1 (fr) * 2011-12-28 2017-05-31 V-Zug AG Appareil de cuisson combiné
EP3190857B1 (fr) * 2016-01-11 2020-04-01 Electrolux Appliances Aktiebolag Appareil de cuisson et procédé de commande pour un tel appareil
GB201620108D0 (en) * 2016-11-28 2017-01-11 Sensor Cambridge Innovation Ltd Oven method of controlling oven and sensors

Also Published As

Publication number Publication date
WO2021183068A1 (fr) 2021-09-16
EP4118381A4 (fr) 2023-11-22

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