EP1845311B1 - Device for measuring the temperature in a cooking oven and cooking oven comprising such a temperature measurement device - Google Patents
Device for measuring the temperature in a cooking oven and cooking oven comprising such a temperature measurement device Download PDFInfo
- Publication number
- EP1845311B1 EP1845311B1 EP07105948.9A EP07105948A EP1845311B1 EP 1845311 B1 EP1845311 B1 EP 1845311B1 EP 07105948 A EP07105948 A EP 07105948A EP 1845311 B1 EP1845311 B1 EP 1845311B1
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- EP
- European Patent Office
- Prior art keywords
- cooking
- temperature
- measurement device
- temperature measurement
- cooking 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.)
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- 238000010411 cooking Methods 0.000 title claims description 147
- 238000009529 body temperature measurement Methods 0.000 title claims 16
- 238000010438 heat treatment Methods 0.000 claims description 37
- 238000004140 cleaning Methods 0.000 claims description 10
- 239000003570 air Substances 0.000 description 49
- 238000009423 ventilation Methods 0.000 description 11
- 238000005485 electric heating Methods 0.000 description 6
- 239000012080 ambient air Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- F24C15/00—Details
- F24C15/006—Arrangements for circulation of cooling air
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- 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
- F24C15/00—Details
- F24C15/02—Doors specially adapted for stoves or ranges
- F24C15/022—Latches
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- 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
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2007—Removing cooking fumes from oven cavities
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- 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
- F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
- F24C14/02—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning pyrolytic type
Definitions
- the present invention relates to a device for measuring temperature in a baking oven.
- It also relates to a cooking oven equipped with such a temperature measuring device according to the invention.
- the present invention relates to domestic cooking ovens in which a temperature measuring device must be implemented to ensure the safety of the oven members and the user.
- This cooking oven comprises a cooking chamber and at least one heating element supplied with energy.
- the temperature inside the cooking chamber is regulated by control means activating said at least one heating element.
- the temperature measuring device makes it possible to monitor the temperature inside the cooking chamber and to actuate safety means when a temperature threshold is exceeded.
- baking ovens comprising a bimetallic thermostat controlling the temperature of an oven and mounted inside an opening so as to be in direct connection, not with the heating elements, but with the cooking chamber.
- a side wall of the cooking chamber has an opening arranged to allow the mounting of a thermostat with the interposition of an insulating protective pad.
- the bimetallic thermostat is located between the baking chamber and the oven housing.
- these temperature measuring devices have the disadvantage of not allowing to ensure the proper operation of the oven depending on the air temperature between the housing and the cooking chamber and the temperature of the enclosure Cooking.
- the insulating protective pad prevents the movement of hot air from the cooking chamber to the bimetallic thermostat and circulating along it.
- baking ovens comprising a bimetallic thermostat ensuring the safety of the components arranged between the housing and the cooking chamber without any hot air circulation of the cooking chamber near the bimetallic thermostat.
- these temperature measuring devices have the disadvantage of detecting an exceeding of a temperature threshold between the housing and the cooking chamber and not taking into account the temperature of the cooking chamber.
- the bimetallic thermostat does not allow to have a trigger threshold related to the internal temperature of the cooking chamber. Which causes a delay time when triggering the bimetallic thermostat since the temperature inside the cooking chamber has exceeded the maximum allowed threshold and the components in thermal relation with the cooking chamber have undergone this temperature overrun.
- a cooking oven described in the document EP 0 663 568 A1 .
- This document describes a cooking oven comprising an oven ventilation duct and a sensor placed downstream of a fan, said fan being arranged at the entrance of the ventilation duct.
- This baking oven makes it possible to measure the temperature or to determine the composition of the fumes leaving the cooking chamber by a sensor disposed in the ventilation duct.
- This sensor makes it possible to determine whether the cooking of the food is reached or whether a pyrolysis cleaning is achieved following a catalytic air treatment process.
- the document EP0663568 specifies that a sensor can not be positioned near the cooking chamber to regulate the temperature of the cooking chamber or determine the composition of the fumes, let alone to place a sensor in a hot air movement from of the cooking chamber.
- this sensor must be placed in a ventilation duct in which a flow of ambient air scans the said sensor to prevent the direct arrival of smoke on it and thus cool it.
- the senor is placed in a mixture of air flow including a hot air flow from the cooking chamber and a flow of ambient air.
- the proportion of the amount of hot air from the suction cooking chamber is reduced compared to the amount of ambient air supplied by the fan in the ventilation duct.
- the amount of ambient air supplied by the fan in the main ventilation duct is much greater than the amount of hot air from the suction cooking chamber in an auxiliary duct opening into the main ventilation duct.
- a cooking oven described in the document GB 1 130 803 A .
- This document describes a self-cleaning baking oven by heat comprising a first lock thermostat switch. When the temperature of the air in the cavity exceeds a temperature threshold, said locking thermostat closes and allows the lighting of a light, the starting of a fan and the locking of the door.
- a second high temperature thermostatic switch is opened and closed to regulate the temperature in the cavity during a cleaning operation of said cavity.
- this self-cleaning cooking oven has the disadvantage of using a set of switch devices to provide a mode of cleaning by the heat of the cavity.
- the thermostatic switch of this oven does not allow to have a trip threshold related to the internal temperature of the cooking chamber. This causes a delay time when triggering the thermostatic switch since the temperature inside the cooking chamber has exceeded the maximum allowed threshold and the components in thermal relation with the cooking chamber have undergone this overrun temperature.
- a cooking oven described in the document DE 91 12 405 U1 .
- This document describes a baking oven comprising an electromagnetic device moving a rod according to the temperature of the cavity to allow the closing of a door during a pyrolysis cleaning mode.
- the magnetic device comprises a winding powered by a thermocouple disposed within the cavity.
- this temperature measuring device has the disadvantage of not allowing to ensure operation of the oven as a function of the air temperature between the housing and the cooking chamber and the temperature of the enclosure of cooking.
- thermocouple must be positioned inside the cavity to activate a complex electromagnetic locking device of a door.
- the present invention aims to solve the aforementioned drawbacks and to provide a cooking oven with a temperature measuring device for implementing a security element to activate and / or deactivate the furnace members when exceeding a temperature threshold raised by the bimetallic thermostat.
- the present invention aims a device for measuring temperature in a cooking oven comprising a housing enclosing a cooking chamber, said cooking chamber comprising an upper wall, a bottom wall, two side walls, a bottom wall and an opening on the front face that can be closed by a door, at least one heating means being placed in thermal relation with the cooking chamber.
- the device for measuring temperature in a cooking oven also comprises at least one bimetallic thermostat mounted near at least one opening in said cooking chamber opening into a zone disposed between said cooking chamber and the cooking chamber. furnace housing, so as to measure the temperature inside said cooking chamber by movement of hot air flowing along said at least one bimetallic thermostat to control the temperature of the cooking chamber and trigger at least one safety baking oven when crossing a temperature threshold.
- said at least one bimetallic thermostat makes it possible to control the temperature inside the cooking chamber, to take into account the power and the type of the less a heating means.
- Said at least one heating means may be a grill element disposed under the upper wall of the cooking chamber, a hearth element disposed above or below the bottom wall of the cooking chamber, and / or a circular element disposed in front of or behind the bottom wall of the cooking chamber. This circular element can be ventilated in a housing comprising a fan.
- the temperature measuring device makes it possible to trigger at least one safety of the cooking oven and to monitor the crossing of a temperature threshold.
- This temperature measuring device also makes it possible to improve the responsiveness of the bimetallic thermostat to trigger at least one safety of the cooking oven.
- Said at least one bimetallic thermostat makes it possible in particular to cut off the power supply of the at least one heating means as soon as a temperature threshold is exceeded without degrading the components in thermal relation with the cooking chamber, and also to lock a Door security element for too high cooking chamber temperature.
- This device also makes it possible to overcome the failures of an electronic control device by a bimetallic thermostat, the latter being an electromechanical safety device.
- the proposed temperature measuring device makes it possible to improve the safety of a cooking oven at the lowest cost and to protect the furnace members more effectively against overheating.
- the temperature measuring device makes it possible to control the temperature of the cooking chamber as a function of the temperature of the air between the housing and said cooking chamber.
- Said at least one bimetallic thermostat makes it possible to respond to all the failures of an electronic control means. Furthermore, said at least one bimetallic thermostat can operate with an electromechanical control means.
- said at least one bimetallic thermostat operates for baking ovens with or without a furnace ventilation means disposed between the housing and the cooking chamber.
- the at least one bimetallic thermostat is adapted to a natural and / or forced convection mode of operation to allow the movement of hot air flowing therealong.
- said movement of hot air flowing along said at least one bimetallic thermostat is caused by at least one fan.
- the temperature measuring device is also sensitive to the speed and the flow rate of the air flow generated by the at least one fan, which may be variable depending on the set temperature required during a cooking or cleaning cycle.
- the temperature measuring device makes it possible to accelerate the reactivity of the at least one bimetallic thermostat by using the ventilation of the oven to store part of the internal heat of the cooking chamber and thus directly measure a temperature value without taking into account the radiation of the at least one heating means.
- Said at least one bimetallic thermostat is disposed near at least one suction zone of the at least one fan.
- said at least one bimetallic thermostat effectively monitors the temperature of the cooking chamber without disturbances related to openings in the housing allowing fresh air to enter the outside of the oven.
- Said at least one heating means is an electric heating resistor.
- said temperature measuring device is fixed to the cooking chamber by a fixing lug, or said temperature measuring device is attached to said at least one heating means.
- said at least one bimetallic thermostat is mounted at a first end of a tube, said tube comprising an air inlet opening at a second end opening into the interior of the tube. cooking chamber and an air outlet opening formed near said bimetallic thermostat.
- the air outlet opening of the tube is in air flow connection with a fan located between the housing and the cooking chamber.
- the tube is mounted on a flange of the heating means.
- a fan comprises at least one suction zone near the exit opening of the tube.
- the temperature measuring device may comprise two bimetallic thermostats having different temperature settings.
- first furnace members can be controlled as soon as a first temperature threshold is exceeded and second members can be controlled as soon as a second temperature threshold is exceeded.
- Said members may allow a first protection of the baking oven and then a second as a function of the temperature value reached.
- the first threshold of exceeding a temperature can control the locking of the oven door for a set temperature of the order of 320 ° C for a pyrolytic cooking oven.
- the first threshold of exceeding a temperature can also control the stopping of the at least one heating means if the oven door is not locked at said set temperature.
- the oven may have a pyrolytic cleaning mode and include at least one bimetallic thermostat controlling a door lock.
- the second threshold of exceeding a temperature can control the breaking of the at least one heating means for a set temperature of the order of 520 ° C corresponding to an overheating safety for a pyrolytic cooking oven.
- At least one bimetallic thermostat can shut off the power supply of the at least one heating means.
- At least one bimetallic thermostat is positioned between at least two branches of said at least one heating means having a tubular shape.
- the invention also relates to a cooking oven comprising a temperature measuring device according to the invention.
- This baking oven has characteristics and advantages similar to those described above with reference to the first aspect of the invention.
- a baking oven 1 comprises a muffle 2 whose front face 3 is closed by a door 4, and surrounded by a housing 5 comprising an upper wall 6, side walls 7 and a bottom wall 8.
- the baking oven 1 may comprise a ventilation device 9 having a fan 10 connected to at least one ventilation duct 11 placed in a space 12 between the casing 5 and the muffle 2 and intended to create an air flow between openings input 13 and output 14.
- a temperature measuring device 15 in a cooking oven 1 comprises a housing 5 enclosing a cooking chamber 2.
- Said cooking chamber 2 comprises an upper wall 16, a lower wall 17, two side walls 18, a bottom wall 19 and an opening 20 on the end face 3 which can be closed by a door 4, at least one heating means 21 being placed in thermal relation with the cooking chamber 2.
- the temperature measuring device 15 comprises at least one bimetallic thermostat 22 mounted near at least one opening 23 formed in said cooking chamber 2 opening into a zone 24 disposed between said cooking chamber 2 and the furnace box 5. , so as to measure the temperature inside said cooking chamber 2 by hot air movement F flowing along said at least one bimetallic thermostat 22.
- the temperature measuring device 15 has a high reactivity to trigger a safety member associated with the control means as soon as a temperature threshold is exceeded.
- Said at least one bimetallic thermostat 22 can cut off the power supply of the at least one heating means 21.
- Said at least one heating means 21 is an electric heating resistor.
- the cooking oven 1 may comprise a first electric heating resistor under the upper wall 16 of the cooking chamber 2 to perform a grill function, a second electric heating resistor under the lower wall 17 of the cooking chamber 2 commonly called element of sole.
- the baking oven 1 may also comprise a circular electric heating element disposed in a cavity 25 between the bottom wall 19 of the cooking chamber 2 and a diffuser 26 mounted inside said cooking chamber 2. Said cavity 25 can also be ventilated by a fan.
- Said movement of hot air F flowing along said at least one bimetallic thermostat 22 is caused by at least one fan 10.
- Said at least one bimetallic thermostat 22 is disposed close to said at least one opening 23 formed in the cooking chamber 2 without closing said at least one opening 23.
- said at least one bimetallic thermostat 22 is disposed between the housing 5 and the cooking chamber 2 without being introduced into said at least one opening 23 of the cooking chamber 2.
- said at least one bimetallic thermostat 22 measures the temperature of the cooking chamber 2 by the movement of hot air F leaving said cooking chamber 2 and takes into account the fresh air circulation between the housing 5 and said cooking chamber 2 caused by the fan 10.
- said at least one opening 23 of the cooking chamber 2 is formed in the bottom wall 19 of said cooking chamber 2 and advantageously in the upper part.
- Said at least one opening 23 of the cooking chamber 2 can be made by a multitude of orifices of small diameter, for example of the order of 4mm in diameter.
- Said at least one opening 23 of the cooking chamber 2 is of reduced size so as to create an air leakage of said cooking chamber 2 without disturbing the operation of the cooking oven 1, in particular the heating distribution of said enclosure cooking 1 and the heating of the components arranged between the housing 5 and said cooking chamber 2.
- the fan 10 causes a forced air flow between the at least one opening 23 of the cooking chamber 2 and a suction zone 32 of said fan 10. This forced air flow is oriented so as to touch the walls of said at least one bimetallic thermostat 22.
- Said at least one bimetallic thermostat 22 is located in the air passage generated by the fan 10.
- Said at least one bimetallic thermostat 22 is disposed near at least one suction zone 32 of the at least one fan 10.
- the temperature measuring device 15 makes it possible to trigger at least one safety during an unplanned shutdown of the fan 10. Following the shutdown of the fan 10, the temperature between the cooking chamber 2 and the housing 5 of the oven 1 increases. Said at least one heating means 21 continues to heat the cooking chamber 2. Said at least one bimetallic thermostat 22 detects an overshoot of a temperature threshold and cuts off the power supply of the at least one heating means 21.
- Said at least one bimetallic thermostat 22 controls the temperature inside the cooking chamber 2 and in the zone 24 disposed between said cooking chamber 2 and the housing 5 of the oven 1. Said oven 1 is secured from the detecting a malfunction by said temperature measuring device 15.
- a predetermined temperature threshold on said at least one bimetallic thermostat 22 is exceeded, the power supply of said at least one heating means 21 is cut off.
- This exceeding of a temperature threshold may come from inside the cooking chamber 2 and / or the zone 24 disposed between said cooking chamber 2 and the housing 5 of the oven 1.
- said at least one bimetallic thermostat 22 may be located in the air passage for the treatment of said fumes. Said at least one bimetallic thermostat 22 may in particular be placed upstream of a catalytic cell.
- said temperature measuring device 15 is fixed to the cooking chamber 2 by a fixing lug 27.
- the fixing of the temperature measuring device 15 is simple and makes it possible to easily position said at least one bimetallic thermostat 22 in the hot air movement F passing through said at least one opening 23 of the cooking chamber 2.
- said temperature measuring device 15 is attached to said at least one heating means 21. And particularly, the temperature measuring device 15 is attached to a flange of the electric heating element 21 disposed under the upper wall 16 of the cooking chamber 2.
- Said at least one bimetallic thermostat 22 may be positioned between at least two branches of said at least one heating means 21 having a tubular shape.
- the temperature measuring device 15 comprises two bimetallic thermostats 22 having different temperature settings.
- first members of the furnace 1 can be controlled as soon as a first temperature threshold is exceeded and second members can be controlled as soon as a second temperature threshold is exceeded. Said members may allow a first protection of the baking oven 1 and then a second as a function of the temperature value reached.
- the first threshold of exceeding a temperature can control the locking of the oven door 4 for a set temperature of the order of 320 ° C for a pyrolytic cooking oven.
- the first threshold of exceeding a temperature can also control the stopping of the at least one heating means 21 if the oven door 4 is not locked at said set temperature.
- the oven 1 may have a pyrolytic cleaning mode and comprise at least one bimetallic thermostat 22 controlling a lock (not shown) of the door 4.
- the second threshold of exceeding a temperature can control the breaking of the at least one heating means 21 for a set temperature of the order of 520 ° C corresponding to an overheating safety for a pyrolytic cooking oven.
- FIG 2 schematically illustrates the various means necessary for the implementation of the invention.
- said at least one bimetallic thermostat 22 is mounted at a first end of a tube 28, said tube 28 comprising an air inlet opening 29 at a second end opening to the inside the cooking chamber 2 and an air outlet opening 30 formed near said at least one bimetallic thermostat 22.
- the hot air movement F is effected from said cooking chamber 2 to said at least one bimetallic thermostat 22 through the tube 28.
- the hot air movement F is channeled through the tube 28 and enters through the opening. air inlet 29 to exit through the air outlet opening 30.
- the tube 28 may be of circular section.
- the air inlet opening 29 of the tube 28 is preferably formed in the section of said tube.
- the air outlet opening of the tube 28 is preferably formed in the peripheral wall of the tube 28.
- Said at least one bimetallic thermostat 22 is positioned at one end of the tube 28 and in relation to the movement of hot air F through an opening 33 formed in the section of said tube 28.
- the air outlet opening 30 and the opening 33 of the tube 28 may form a single opening.
- the hot air movement F passing through the tube 28 preferably rises along a wall 34 of said at least one thermostat 22 to increase the heat exchange surface.
- the air outlet opening 30 of the tube 28 is in air flow connection with a fan 10 located between the housing 5 and the cooking chamber 2.
- the air outlet opening 30 is preferably arranged in the direction of the suction zone 32 of the fan 10. In the embodiment of the invention illustrated in FIG. figure 2 , the air outlet opening 30 is directed towards the top of the cooking oven 1, the fan 10 being disposed at least partly above the upper wall 16 of the cooking chamber 2.
- the tube 28 is mounted on a flange 31 of the heating means 21.
- Said heating means 21 may be an electric grill element disposed below the upper wall 16 of the cooking chamber 2.
- the flange 31 of the at least one heating means 21 makes it possible to hold the latter to said cooking chamber 2 by fastening means (not shown) as well as the tube 28 of the temperature measuring device 15.
- a fan 10 comprises at least one suction zone 32 near the air outlet opening 30 of the tube 28.
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- Electric Stoves And Ranges (AREA)
Description
La présente invention concerne un dispositif de mesure de température dans un four de cuisson.The present invention relates to a device for measuring temperature in a baking oven.
Elle concerne également un four de cuisson équipé d'un tel dispositif de mesure de température conforme à l'invention.It also relates to a cooking oven equipped with such a temperature measuring device according to the invention.
De manière générale, la présente invention concerne les fours de cuisson domestiques dans lesquels un dispositif de mesure de température doit être mis en oeuvre pour assurer la sécurité des organes du four et de l'utilisateur.In general, the present invention relates to domestic cooking ovens in which a temperature measuring device must be implemented to ensure the safety of the oven members and the user.
Ce four de cuisson comprend une enceinte de cuisson et au moins un élément chauffant alimenté en énergie. La température à l'intérieur de l'enceinte de cuisson est régulée par des moyens de commande activant ledit au moins un élément chauffant. Le dispositif de mesure de température permet de surveiller la température à l'intérieur de l'enceinte de cuisson et d'actionner des moyens de sécurité lors d'un dépassement d'un seuil de température.This cooking oven comprises a cooking chamber and at least one heating element supplied with energy. The temperature inside the cooking chamber is regulated by control means activating said at least one heating element. The temperature measuring device makes it possible to monitor the temperature inside the cooking chamber and to actuate safety means when a temperature threshold is exceeded.
On connaît d'une part des fours de cuisson comprenant un thermostat bimétallique assurant la régulation de la température d'un four et monté à l'intérieur d'une ouverture de façon à être en liaison directe, non pas avec les éléments de chauffe, mais avec la chambre de cuisson. Une paroi latérale de la chambre de cuisson présente une ouverture agencée pour permettre le montage d'un thermostat avec interposition d'une plaquette isolante de protection. Le thermostat bimétallique est disposé entre la chambre de cuisson et le boîtier du four.On the one hand, there are known baking ovens comprising a bimetallic thermostat controlling the temperature of an oven and mounted inside an opening so as to be in direct connection, not with the heating elements, but with the cooking chamber. A side wall of the cooking chamber has an opening arranged to allow the mounting of a thermostat with the interposition of an insulating protective pad. The bimetallic thermostat is located between the baking chamber and the oven housing.
Cependant, ces dispositifs de mesure de température ont l'inconvénient de ne pas permettre d'assurer le bon fonctionnement du four en fonction de la température de l'air entre le boîtier et l'enceinte de cuisson et de la température de l'enceinte de cuisson. En outre, la plaquette isolante de protection empêche le mouvement de l'air chaud de l'enceinte de cuisson vers le thermostat bimétallique et de circuler le long de celui-ci. Ces dispositifs de mesure de température permettent d'assurer la régulation de la température à l'intérieur de l'enceinte de cuisson et non la sécurité du four dès le dépassement d'un seuil de température.However, these temperature measuring devices have the disadvantage of not allowing to ensure the proper operation of the oven depending on the air temperature between the housing and the cooking chamber and the temperature of the enclosure Cooking. In addition, the insulating protective pad prevents the movement of hot air from the cooking chamber to the bimetallic thermostat and circulating along it. These temperature measuring devices make it possible to regulate the temperature inside the cooking chamber and not the safety of the oven as soon as a temperature threshold is exceeded.
On connaît d'autre part des fours de cuisson comprenant un thermostat bimétallique assurant la sécurité des composants disposés entre le boîtier et l'enceinte de cuisson sans aucune circulation d'air chaud de l'enceinte de cuisson à proximité du thermostat bimétallique.On the other hand, there are known baking ovens comprising a bimetallic thermostat ensuring the safety of the components arranged between the housing and the cooking chamber without any hot air circulation of the cooking chamber near the bimetallic thermostat.
Cependant, ces dispositifs de mesure de température ont l'inconvénient de détecter un dépassement d'un seuil de température entre le boîtier et l'enceinte de cuisson et en ne tenant pas compte de la température de l'enceinte de cuisson. Le thermostat bimétallique ne permet pas d'avoir un seuil de déclenchement lié à la température interne de l'enceinte de cuisson. Ce qui occasionne un temps de retard lors du déclenchement du thermostat bimétallique puisque la température à l'intérieur de l'enceinte de cuisson a dépassé le seuil maximum toléré et les composants en relation thermique avec l'enceinte de cuisson ont subi ce dépassement de température.However, these temperature measuring devices have the disadvantage of detecting an exceeding of a temperature threshold between the housing and the cooking chamber and not taking into account the temperature of the cooking chamber. The bimetallic thermostat does not allow to have a trigger threshold related to the internal temperature of the cooking chamber. Which causes a delay time when triggering the bimetallic thermostat since the temperature inside the cooking chamber has exceeded the maximum allowed threshold and the components in thermal relation with the cooking chamber have undergone this temperature overrun.
On connaît également un four de cuisson décrit dans le document
Cependant, le document
Par conséquent d'après le document
En outre, le capteur est placé dans un mélange de flux d'air dont un flux d'air chaud provenant de l'enceinte de cuisson et d'un flux d'air ambiant. La proportion de la quantité d'air chaud provenant de l'enceinte de cuisson par aspiration est réduite par rapport à la quantité d'air ambiant fournie par le ventilateur dans le conduit de ventilation. La quantité d'air ambiant fournie par le ventilateur dans le conduit de ventilation principal est grandement supérieure à la quantité d'air chaud provenant de l'enceinte de cuisson par aspiration dans un conduit auxiliaire débouchant dans le conduit principal de ventilation.In addition, the sensor is placed in a mixture of air flow including a hot air flow from the cooking chamber and a flow of ambient air. The proportion of the amount of hot air from the suction cooking chamber is reduced compared to the amount of ambient air supplied by the fan in the ventilation duct. The amount of ambient air supplied by the fan in the main ventilation duct is much greater than the amount of hot air from the suction cooking chamber in an auxiliary duct opening into the main ventilation duct.
On connaît également un four de cuisson décrit dans le document
Cependant, ce four de cuisson autonettoyant présente l'inconvénient d'utiliser un ensemble de dispositifs d'interrupteurs pour assurer un mode de nettoyage par la chaleur de la cavité. L'interrupteur thermostatique de ce four de cuisson ne permet pas d'avoir un seuil de déclenchement lié à la température interne de l'enceinte de cuisson. Ce qui occasionne un temps de retard lors du déclenchement de l'interrupteur thermostatique puisque la température à l'intérieur de l'enceinte de cuisson a dépassé le seuil maximum toléré et les composants en relation thermique avec l'enceinte de cuisson ont subi ce dépassement de température.However, this self-cleaning cooking oven has the disadvantage of using a set of switch devices to provide a mode of cleaning by the heat of the cavity. The thermostatic switch of this oven does not allow to have a trip threshold related to the internal temperature of the cooking chamber. This causes a delay time when triggering the thermostatic switch since the temperature inside the cooking chamber has exceeded the maximum allowed threshold and the components in thermal relation with the cooking chamber have undergone this overrun temperature.
On connaît également un four de cuisson décrit dans le document
Cependant, ce dispositif de mesure de température a l'inconvénient de ne pas permettre d'assurer un fonctionnement du four en fonction de la température de l'air entre le boîtier et l'enceinte de cuisson et de la température de l'enceinte de cuisson.However, this temperature measuring device has the disadvantage of not allowing to ensure operation of the oven as a function of the air temperature between the housing and the cooking chamber and the temperature of the enclosure of cooking.
En outre, le thermocouple doit être positionné à l'intérieur de la cavité pour activer un dispositif électromagnétique complexe de verrouillage d'une porte.In addition, the thermocouple must be positioned inside the cavity to activate a complex electromagnetic locking device of a door.
La présente invention a pour but de résoudre les inconvénients précités et de proposer un four de cuisson avec un dispositif de mesure de température permettant de mettre en oeuvre un élément de sécurité pour activer et / ou désactiver des organes du four dès le dépassement d'un seuil de température relevé par le thermostat bimétallique.The present invention aims to solve the aforementioned drawbacks and to provide a cooking oven with a temperature measuring device for implementing a security element to activate and / or deactivate the furnace members when exceeding a temperature threshold raised by the bimetallic thermostat.
A cet effet, la présente invention vise un dispositif de mesure de température dans un four de cuisson comprenant un boîtier enfermant une enceinte de cuisson, ladite enceinte de cuisson comprenant une paroi supérieure, une paroi inférieure, deux parois latérales, une paroi de fond et une ouverture en face frontale pouvant être fermée par une porte, au moins un moyen de chauffe étant placé en relation thermique avec l'enceinte de cuisson.For this purpose, the present invention aims a device for measuring temperature in a cooking oven comprising a housing enclosing a cooking chamber, said cooking chamber comprising an upper wall, a bottom wall, two side walls, a bottom wall and an opening on the front face that can be closed by a door, at least one heating means being placed in thermal relation with the cooking chamber.
Selon l'invention, le dispositif de mesure de température dans un four de cuisson comprend également au moins un thermostat bimétallique monté à proximité d'au moins une ouverture ménagée dans ladite enceinte de cuisson débouchant dans une zone disposée entre ladite enceinte de cuisson et le boîtier du four, de sorte à mesurer la température à l'intérieur de ladite enceinte de cuisson par mouvement d'air chaud circulant le long dudit au moins un thermostat bimétallique pour contrôler la température de l'enceinte de cuisson et déclencher au moins une sécurité du four de cuisson dès le franchissement d'un seuil de température.According to the invention, the device for measuring temperature in a cooking oven also comprises at least one bimetallic thermostat mounted near at least one opening in said cooking chamber opening into a zone disposed between said cooking chamber and the cooking chamber. furnace housing, so as to measure the temperature inside said cooking chamber by movement of hot air flowing along said at least one bimetallic thermostat to control the temperature of the cooking chamber and trigger at least one safety baking oven when crossing a temperature threshold.
Ainsi, ledit au moins un thermostat bimétallique permet de contrôler la température à l'intérieur de l'enceinte de cuisson, de tenir compte de la puissance et du type du au moins un moyen de chauffe. Ledit au moins un moyen de chauffe peut être un élément de grill disposé sous la paroi supérieure de l'enceinte de cuisson, un élément de sole disposé au dessus ou en dessous de la paroi inférieure de l'enceinte de cuisson, et / ou un élément circulaire disposé devant ou derrière la paroi de fond de l'enceinte de cuisson. Cet élément circulaire peut être ventilé dans un logement comprenant un ventilateur.Thus, said at least one bimetallic thermostat makes it possible to control the temperature inside the cooking chamber, to take into account the power and the type of the less a heating means. Said at least one heating means may be a grill element disposed under the upper wall of the cooking chamber, a hearth element disposed above or below the bottom wall of the cooking chamber, and / or a circular element disposed in front of or behind the bottom wall of the cooking chamber. This circular element can be ventilated in a housing comprising a fan.
Le dispositif de mesure de température permet de déclencher au moins une sécurité du four de cuisson et de surveiller le franchissement d'un seuil de température.The temperature measuring device makes it possible to trigger at least one safety of the cooking oven and to monitor the crossing of a temperature threshold.
Ce dispositif de mesure de température permet en outre d'améliorer la réactivité du thermostat bimétallique pour déclencher au moins une sécurité du four de cuisson.This temperature measuring device also makes it possible to improve the responsiveness of the bimetallic thermostat to trigger at least one safety of the cooking oven.
Ledit au moins un thermostat bimétallique permet notamment de couper l'alimentation en énergie du au moins un moyen de chauffe dès le dépassement d'un seuil de température sans dégrader les composants en relation thermique avec l'enceinte de cuisson, et aussi de verrouiller un élément de sécurité de la porte pour une température de l'enceinte de cuisson trop élevée.Said at least one bimetallic thermostat makes it possible in particular to cut off the power supply of the at least one heating means as soon as a temperature threshold is exceeded without degrading the components in thermal relation with the cooking chamber, and also to lock a Door security element for too high cooking chamber temperature.
Ce dispositif permet également de pallier aux défaillances d'un dispositif de commande électronique par un thermostat bimétallique, ce dernier étant un organe de sécurité électromécanique.This device also makes it possible to overcome the failures of an electronic control device by a bimetallic thermostat, the latter being an electromechanical safety device.
Le dispositif de mesure de température proposé permet d'améliorer la sécurité d'un four de cuisson au moindre coût et de protéger plus efficacement les organes du four contre une surchauffe.The proposed temperature measuring device makes it possible to improve the safety of a cooking oven at the lowest cost and to protect the furnace members more effectively against overheating.
Le dispositif de mesure de température permet de contrôler la température de l'enceinte de cuisson en fonction de la température de l'air entre le boîtier et ladite enceinte de cuisson.The temperature measuring device makes it possible to control the temperature of the cooking chamber as a function of the temperature of the air between the housing and said cooking chamber.
Ledit au moins un thermostat bimétallique permet de répondre à toutes les défaillances d'un moyen de commande électronique. Par ailleurs, ledit au moins un thermostat bimétallique peut fonctionner avec un moyen de commande électromécanique.Said at least one bimetallic thermostat makes it possible to respond to all the failures of an electronic control means. Furthermore, said at least one bimetallic thermostat can operate with an electromechanical control means.
En outre, ledit au moins un thermostat bimétallique fonctionne pour des fours de cuisson ayant ou non un moyen de ventilation du four disposé entre le boîtier et l'enceinte de cuisson. Ledit au moins un thermostat bimétallique est adapté à un mode de fonctionnement par convection naturelle et / ou forcée pour permettre le mouvement d'air chaud circulant le long de celui-ci.In addition, said at least one bimetallic thermostat operates for baking ovens with or without a furnace ventilation means disposed between the housing and the cooking chamber. The at least one bimetallic thermostat is adapted to a natural and / or forced convection mode of operation to allow the movement of hot air flowing therealong.
Selon une caractéristique préférée de l'invention, ledit mouvement d'air chaud circulant le long dudit au moins un thermostat bimétallique est provoqué par au moins un ventilateur.According to a preferred feature of the invention, said movement of hot air flowing along said at least one bimetallic thermostat is caused by at least one fan.
De cette manière, le flux d'air provenant de l'enceinte de cuisson est de débit plus élevé et la sensibilité du dispositif de mesure de température est améliorée.In this way, the flow of air from the cooking chamber is higher and the sensitivity of the temperature measuring device is improved.
Le dispositif de mesure de température est également sensible à la vitesse et au débit du flux d'air généré par ledit au moins un ventilateur qui peuvent être variables en fonction de la température de consigne requise lors d'un cycle de cuisson ou de nettoyage.The temperature measuring device is also sensitive to the speed and the flow rate of the air flow generated by the at least one fan, which may be variable depending on the set temperature required during a cooking or cleaning cycle.
Le dispositif de mesure de température permet d'accélérer la réactivité du au moins un thermostat bimétallique en utilisant la ventilation du four pour emmagasiner une partie de la chaleur interne de l'enceinte de cuisson et ainsi mesurer directement une valeur de température sans tenir compte du rayonnement du au moins un moyen de chauffe.The temperature measuring device makes it possible to accelerate the reactivity of the at least one bimetallic thermostat by using the ventilation of the oven to store part of the internal heat of the cooking chamber and thus directly measure a temperature value without taking into account the radiation of the at least one heating means.
Ledit au moins un thermostat bimétallique est disposé à proximité d'au moins une zone d'aspiration du au moins un ventilateur.Said at least one bimetallic thermostat is disposed near at least one suction zone of the at least one fan.
De cette manière, ledit au moins un thermostat bimétallique surveille efficacement la température de l'enceinte de cuisson sans perturbations liées à des ouvertures dans le boîtier permettant l'entrée d'air frais de l'extérieur du four.In this way, said at least one bimetallic thermostat effectively monitors the temperature of the cooking chamber without disturbances related to openings in the housing allowing fresh air to enter the outside of the oven.
Ledit au moins un moyen de chauffe est une résistance chauffante électrique.Said at least one heating means is an electric heating resistor.
En pratique, ledit dispositif de mesure de température est fixé à l'enceinte de cuisson par une patte de fixation, ou encore ledit dispositif de mesure de température est fixé audit au moins un moyen de chauffe.In practice, said temperature measuring device is fixed to the cooking chamber by a fixing lug, or said temperature measuring device is attached to said at least one heating means.
Dans un mode de réalisation de l'invention, ledit au moins un thermostat bimétallique est monté à une première extrémité d'un tube, ledit tube comprenant une ouverture d'entrée d'air à une seconde extrémité débouchant à l'intérieur de l'enceinte de cuisson et une ouverture de sortie d'air ménagée à proximité dudit thermostat bimétallique.In one embodiment of the invention, said at least one bimetallic thermostat is mounted at a first end of a tube, said tube comprising an air inlet opening at a second end opening into the interior of the tube. cooking chamber and an air outlet opening formed near said bimetallic thermostat.
L'ouverture de sortie d'air du tube est en liaison d'écoulement d'air avec un ventilateur situé entre le boîtier et l'enceinte de cuisson.The air outlet opening of the tube is in air flow connection with a fan located between the housing and the cooking chamber.
Le tube est monté sur une bride du moyen de chauffe.The tube is mounted on a flange of the heating means.
Un ventilateur comprend au moins une zone d'aspiration à proximité de l'ouverture de sortie du tube.A fan comprises at least one suction zone near the exit opening of the tube.
Le dispositif de mesure de température peut comprendre deux thermostats bimétalliques ayant des consignes de température différentes.The temperature measuring device may comprise two bimetallic thermostats having different temperature settings.
Ainsi, des premiers organes du four peuvent être commandés dès le dépassement d'un premier seuil de température et des seconds organes peuvent être commandés dès le dépassement d'un second seuil de température. Lesdits organes peuvent permettre une première protection du four de cuisson puis une seconde en fonction de la valeur de température atteinte.Thus, first furnace members can be controlled as soon as a first temperature threshold is exceeded and second members can be controlled as soon as a second temperature threshold is exceeded. Said members may allow a first protection of the baking oven and then a second as a function of the temperature value reached.
En pratique, le premier seuil de dépassement d'une température peut commander le verrouillage de la porte de four pour une température de consigne de l'ordre de 320 °C pour un four de cuisson pyrolytique. Le premier seuil de dépassement d'une température peut aussi commander l'arrêt du au moins un moyen de chauffe si la porte de four n'est pas verrouillée à ladite température de consigne.In practice, the first threshold of exceeding a temperature can control the locking of the oven door for a set temperature of the order of 320 ° C for a pyrolytic cooking oven. The first threshold of exceeding a temperature can also control the stopping of the at least one heating means if the oven door is not locked at said set temperature.
Le four peut avoir un mode de nettoyage pyrolytique et comprendre au moins un thermostat bimétallique commandant un verrouillage de porte.The oven may have a pyrolytic cleaning mode and include at least one bimetallic thermostat controlling a door lock.
Le second seuil de dépassement d'une température peut commander la coupure du au moins un moyen de chauffe pour une température de consigne de l'ordre de 520°C correspondant à une sécurité de surchauffe pour un four de cuisson pyrolytique.The second threshold of exceeding a temperature can control the breaking of the at least one heating means for a set temperature of the order of 520 ° C corresponding to an overheating safety for a pyrolytic cooking oven.
Au moins un thermostat bimétallique peut couper l'alimentation en énergie dudit au moins un moyen de chauffe.At least one bimetallic thermostat can shut off the power supply of the at least one heating means.
Au moins un thermostat bimétallique est positionné entre au moins deux branches dudit au moins un moyen de chauffe ayant une forme tubulaire.At least one bimetallic thermostat is positioned between at least two branches of said at least one heating means having a tubular shape.
Selon un second aspect, l'invention concerne également un four de cuisson comprenant un dispositif de mesure de température conforme à l'invention.According to a second aspect, the invention also relates to a cooking oven comprising a temperature measuring device according to the invention.
Ce four de cuisson présente des caractéristiques et avantages analogues à ceux décrits précédemment en référence au premier aspect de l'invention.This baking oven has characteristics and advantages similar to those described above with reference to the first aspect of the invention.
D'autres particularités et avantages de l'invention apparaîtront encore dans la description ci-après.Other features and advantages of the invention will become apparent in the description below.
Aux dessins annexés, donnés à titre d'exemples non limitatifs :
- la
figure 1 représente une vue schématique d'un four de cuisson dans un premier mode de réalisation conforme à l'invention ; et - la
figure 2 représente une vue schématique et partielle d'un four de cuisson dans un second mode de réalisation conforme à l'invention.
- the
figure 1 represents a schematic view of a baking oven in a first embodiment according to the invention; and - the
figure 2 is a schematic and partial view of a baking oven in a second embodiment according to the invention.
On va décrire tout d'abord, en référence à la
Un four de cuisson 1 comprend un moufle 2 dont la face frontale 3 est fermée par une porte 4, et entouré par un boîtier 5 comprenant une paroi supérieure 6, des parois latérales 7 et une paroi inférieure 8.A baking oven 1 comprises a
Le four de cuisson 1 peut comprendre un dispositif de ventilation 9 ayant un ventilateur 10 connecté à au moins un conduit de ventilation 11 placé dans un espace 12 entre le boîtier 5 et le moufle 2 et destiné à créer une circulation d'air entre des ouvertures d'entrée 13 et de sortie 14.The baking oven 1 may comprise a ventilation device 9 having a
On notera aussi que les figures sont schématiques et que de nombreux organes nécessaires au fonctionnement du four de cuisson, par exemple les moyens de commande, l'isolant thermique entourant le moufle, ... ont été omis et n'ont pas besoin d'être décrits en détail ici.Note also that the figures are schematic and that many organs necessary for the operation of the baking oven, for example the control means, the thermal insulation surrounding the muffle, ... have been omitted and do not need to to be described in detail here.
Dans la description de l'invention réalisée ci-après, l'ensemble constitué du moufle et de l'isolant thermique l'entourant est considéré comme un seul élément. Cet ensemble sera dénommé enceinte de cuisson dans la suite du présent document.In the description of the invention carried out below, the assembly consisting of the muffle and the surrounding thermal insulation is considered as a single element. This set will be called cooking enclosure in the remainder of this document.
On va décrire à présent un premier mode de réalisation du dispositif de mesure de température d'un four de cuisson, en référence à la
Un dispositif de mesure de température 15 dans un four de cuisson 1 comprend un boîtier 5 enfermant une enceinte de cuisson 2.A temperature measuring device 15 in a cooking oven 1 comprises a housing 5 enclosing a
Ladite enceinte de cuisson 2 comprend une paroi supérieure 16, une paroi inférieure 17, deux parois latérales 18, une paroi de fond 19 et une ouverture 20 en face frontale 3 pouvant être fermée par une porte 4, au moins un moyen de chauffe 21 étant placé en relation thermique avec l'enceinte de cuisson 2.Said
Le dispositif de mesure de température 15 comprend au moins un thermostat bimétallique 22 monté à proximité d'au moins une ouverture 23 ménagée dans ladite enceinte de cuisson 2 débouchant dans une zone 24 disposée entre ladite enceinte de cuisson 2 et le boîtier 5 du four 1, de sorte à mesurer la température à l'intérieur de ladite enceinte de cuisson 2 par mouvement d'air chaud F circulant le long dudit au moins un thermostat bimétallique 22.The temperature measuring device 15 comprises at least one
Ainsi, le dispositif de mesure de température 15 a une grande réactivité pour déclencher un organe de sécurité associé aux moyens de commande dès le dépassement d'un seuil de température.Thus, the temperature measuring device 15 has a high reactivity to trigger a safety member associated with the control means as soon as a temperature threshold is exceeded.
Ledit au moins un thermostat bimétallique 22 peut couper l'alimentation en énergie dudit au moins un moyen de chauffe 21.Said at least one
Ledit au moins un moyen de chauffe 21 est une résistance chauffante électrique. Le four de cuisson 1 peut comprendre une première résistance chauffante électrique sous la paroi supérieure 16 de l'enceinte de cuisson 2 pour remplir une fonction de grill, une seconde résistance chauffante électrique sous la paroi inférieure 17 de l'enceinte de cuisson 2 couramment appelée élément de sole. Le four de cuisson 1 peut également comprendre un élément chauffant électrique circulaire disposé dans une cavité 25 entre la paroi de fond 19 de l'enceinte de cuisson 2 et un diffuseur 26 monté à l'intérieur de ladite enceinte de cuisson 2. Ladite cavité 25 peut en outre être ventilée par un ventilateur.Said at least one heating means 21 is an electric heating resistor. The cooking oven 1 may comprise a first electric heating resistor under the
Ledit mouvement d'air chaud F circulant le long dudit au moins un thermostat bimétallique 22 est provoqué par au moins un ventilateur 10.Said movement of hot air F flowing along said at least one
Ledit au moins un thermostat bimétallique 22 est disposé à proximité de ladite au moins une ouverture 23 ménagée dans l'enceinte de cuisson 2 sans obturer ladite au moins une ouverture 23.Said at least one
Préférentiellement, ledit au moins un thermostat bimétallique 22 est disposé entre le boîtier 5 et l'enceinte de cuisson 2 sans être introduit dans ladite au moins une ouverture 23 de l'enceinte de cuisson 2.Preferably, said at least one
En outre, ledit au moins un thermostat bimétallique 22 mesure la température de l'enceinte de cuisson 2 par le mouvement d'air chaud F sortant de ladite enceinte de cuisson 2 et prend en considération la circulation d'air frais entre le boîtier 5 et ladite enceinte de cuisson 2 provoquée par le ventilateur 10.In addition, said at least one
De préférence, ladite au moins une ouverture 23 de l'enceinte de cuisson 2 est ménagée dans la paroi de fond 19 de ladite enceinte de cuisson 2 et avantageusement en partie supérieure.Preferably, said at least one
Ladite au moins une ouverture 23 de l'enceinte de cuisson 2 peut être réalisée par une multitude d'orifices de faible diamètre, par exemple de l'ordre de 4mm de diamètre.Said at least one
Ladite au moins une ouverture 23 de l'enceinte de cuisson 2 est de taille réduite de manière à créer une fuite d'air de ladite enceinte de cuisson 2 sans perturber le fonctionnement du four de cuisson 1, notamment la répartition de chauffe de ladite enceinte de cuisson 1 et les échauffements des composants disposés entre le boîtier 5 et ladite enceinte de cuisson 2.Said at least one
Le ventilateur 10 provoque une circulation d'air forcée entre ladite au moins une ouverture 23 de l'enceinte de cuisson 2 et une zone d'aspiration 32 dudit ventilateur 10. Cette circulation d'air forcée est orientée de manière à effleurer les parois dudit au moins un thermostat bimétallique 22. Ledit au moins un thermostat bimétallique 22 se trouve dans le passage d'air généré par le ventilateur 10. Ledit au moins un thermostat bimétallique 22 est disposé à proximité d'au moins une zone d'aspiration 32 du au moins un ventilateur 10.The
Le dispositif de mesure de température 15 permet de déclencher au moins une sécurité lors d'un arrêt de fonctionnement non prévu du ventilateur 10. Suite à l'arrêt du ventilateur 10, la température entre l'enceinte de cuisson 2 et le boîtier 5 du four 1 augmente. Ledit au moins un moyen de chauffe 21 continue à chauffer l'enceinte de cuisson 2. Ledit au moins un thermostat bimétallique 22 détecte un dépassement d'un seuil de température et coupe l'alimentation en énergie du au moins un moyen de chauffe 21.The temperature measuring device 15 makes it possible to trigger at least one safety during an unplanned shutdown of the
Ledit au moins un thermostat bimétallique 22 contrôle la température à l'intérieur de l'enceinte de cuisson 2 et dans la zone 24 disposée entre ladite enceinte de cuisson 2 et le boîtier 5 du four 1. Ledit four 1 est mis en sécurité dès la détection d'un dysfonctionnement par ledit dispositif de mesure de température 15.Said at least one
Dès le dépassement d'un seuil de température préréglé sur ledit au moins un thermostat bimétallique 22, l'alimentation en énergie dudit au moins un moyen de chauffe 21 est coupée. Ce dépassement d'un seuil de température peut provenir de l'intérieur de l'enceinte de cuisson 2 et / ou de la zone 24 disposée entre ladite enceinte de cuisson 2 et le boîtier 5 du four 1.As soon as a predetermined temperature threshold on said at least one
Dans un four de cuisson 1 comprenant une cellule catalytique (non représentée) pour le traitement des fumées, ledit au moins un thermostat bimétallique 22 peut se situer dans le passage d'air pour le traitement desdites fumées. Ledit au moins un thermostat bimétallique 22 peut notamment se placer en amont d'une cellule catalytique.In a cooking oven 1 comprising a catalytic cell (not shown) for the treatment of flue gases, said at least one
Dans un mode de réalisation de l'invention, ledit dispositif de mesure de température 15 est fixé à l'enceinte de cuisson 2 par une patte de fixation 27. La fixation du dispositif de mesure de température 15 est simple et permet de positionner aisément ledit au moins un thermostat bimétallique 22 dans le mouvement d'air chaud F traversant ladite au moins une ouverture 23 de l'enceinte de cuisson 2.In one embodiment of the invention, said temperature measuring device 15 is fixed to the
Dans un autre mode de réalisation de l'invention, ledit dispositif de mesure de température 15 est fixé audit au moins un moyen de chauffe 21. Et particulièrement, le dispositif de mesure de température 15 est fixé à une bride de l'élément chauffant électrique 21 disposé sous la paroi supérieure 16 de l'enceinte de cuisson 2.In another embodiment of the invention, said temperature measuring device 15 is attached to said at least one heating means 21. And particularly, the temperature measuring device 15 is attached to a flange of the
Ledit au moins un thermostat bimétallique 22 peut être positionné entre au moins deux branches dudit au moins un moyen de chauffe 21 ayant une forme tubulaire.Said at least one
Dans un mode de réalisation de l'invention, le dispositif de mesure de température 15 comprend deux thermostats bimétalliques 22 ayant des consignes de température différentes.In one embodiment of the invention, the temperature measuring device 15 comprises two
Ainsi, des premiers organes du four 1 peuvent être commandés dès le dépassement d'un premier seuil de température et des seconds organes peuvent être commandés dès le dépassement d'un second seuil de température. Lesdits organes peuvent permettre une première protection du four de cuisson 1 puis une seconde en fonction de la valeur de température atteinte.Thus, first members of the furnace 1 can be controlled as soon as a first temperature threshold is exceeded and second members can be controlled as soon as a second temperature threshold is exceeded. Said members may allow a first protection of the baking oven 1 and then a second as a function of the temperature value reached.
En pratique, le premier seuil de dépassement d'une température peut commander le verrouillage de la porte 4 de four 1 pour une température de consigne de l'ordre de 320°C pour un four de cuisson pyrolytique. Le premier seuil de dépassement d'une température peut aussi commander l'arrêt du au moins un moyen de chauffe 21 si la porte 4 de four 1 n'est pas verrouillée à ladite température de consigne.In practice, the first threshold of exceeding a temperature can control the locking of the
Le four 1 peut avoir un mode de nettoyage pyrolytique et comprendre au moins un thermostat bimétallique 22 commandant un verrouillage (non représenté) de porte 4.The oven 1 may have a pyrolytic cleaning mode and comprise at least one
Le second seuil de dépassement d'une température peut commander la coupure du au moins un moyen de chauffe 21 pour une température de consigne de l'ordre de 520 °C correspondant à une sécurité de surchauffe pour un four de cuisson pyrolytique.The second threshold of exceeding a temperature can control the breaking of the at least one heating means 21 for a set temperature of the order of 520 ° C corresponding to an overheating safety for a pyrolytic cooking oven.
On va décrire à présent un second mode de réalisation d'un dispositif de mesure de température d'un four de cuisson, en référence à la
Comme précédemment, la
Les éléments identiques au mode de réalisation précédent, et portant les mêmes références numériques, ne seront pas redécrits ci-après.The elements identical to the previous embodiment, and bearing the same reference numerals, will not be described below.
Dans ce mode de réalisation de l'invention, ledit au moins un thermostat bimétallique 22 est monté à une première extrémité d'un tube 28, ledit tube 28 comprenant une ouverture d'entrée d'air 29 à une seconde extrémité débouchant à l'intérieur de l'enceinte de cuisson 2 et une ouverture de sortie d'air 30 ménagée à proximité dudit au moins un thermostat bimétallique 22.In this embodiment of the invention, said at least one
Le mouvement d'air chaud F s'effectue de ladite enceinte de cuisson 2 vers ledit au moins un thermostat bimétallique 22 au travers du tube 28. Le mouvement d'air chaud F est canalisé par le tube 28 et entre par l'ouverture d'entrée d'air 29 pour sortir par l'ouverture de sortie d'air 30.The hot air movement F is effected from said
Le tube 28 peut être de section circulaire.The tube 28 may be of circular section.
L'ouverture d'entrée d'air 29 du tube 28 est préférentiellement ménagée dans la section dudit tube. Et l'ouverture de sortie d'air du tube 28 est préférentiellement ménagée dans la paroi périphérique du tube 28.The air inlet opening 29 of the tube 28 is preferably formed in the section of said tube. And the air outlet opening of the tube 28 is preferably formed in the peripheral wall of the tube 28.
Ledit au moins un thermostat bimétallique 22 est positionné à une extrémité du tube 28 et en relation avec le mouvement d'air chaud F par une ouverture 33 ménagée dans la section dudit tube 28.Said at least one
L'ouverture de sortie d'air 30 et l'ouverture 33 du tube 28 peuvent ne former qu'une seule ouverture.The air outlet opening 30 and the opening 33 of the tube 28 may form a single opening.
Le mouvement d'air chaud F traversant le tube 28 remonte préférentiellement le long d'une paroi 34 dudit au moins un thermostat 22 pour augmenter la surface d'échange thermique.The hot air movement F passing through the tube 28 preferably rises along a
L'ouverture de sortie d'air 30 du tube 28 est en liaison d'écoulement d'air avec un ventilateur 10 situé entre le boîtier 5 et l'enceinte de cuisson 2.The air outlet opening 30 of the tube 28 is in air flow connection with a
L'ouverture de sortie d'air 30 est préférentiellement disposée en direction de la zone d'aspiration 32 du ventilateur 10. Dans le mode de réalisation de l'invention illustré à la
Le tube 28 est monté sur une bride 31 du moyen de chauffe 21. Ledit moyen de chauffe 21 peut être un élément de grill électrique disposé en dessous de la paroi supérieure 16 de l'enceinte de cuisson 2.The tube 28 is mounted on a flange 31 of the heating means 21. Said heating means 21 may be an electric grill element disposed below the
La bride 31 du au moins un moyen de chauffe 21 permet de retenir ce dernier à ladite enceinte de cuisson 2 par des moyens de fixation (non représentés) ainsi que le tube 28 du dispositif de mesure de température 15.The flange 31 of the at least one heating means 21 makes it possible to hold the latter to said
Un ventilateur 10 comprend au moins une zone d'aspiration 32 à proximité de l'ouverture de sortie d'air 30 du tube 28.A
Bien entendu, la présente invention n'est nullement limitée aux modes de réalisation décrits et représentés, mais englobe, bien au contraire, toute variante à portée de l'homme du métier dans le cadre des revendications annexées.Of course, the present invention is not limited to the embodiments described and shown, but encompasses, on the contrary, any variant within the scope of those skilled in the art within the scope of the appended claims.
Claims (14)
- A device for measuring temperature within a cooking oven comprising a housing (5) enclosing a cooking cavity (2), said cooking cavity (2) comprising an upper wall (16), a lower wall (17), two side walls (18), a back wall (19), and an opening (20) on the front (3) that can be closed by a door (4), at least one heating means (21) being placed in thermal connection with the cooking cavity (2), at least one thermostat (22) installed near at least one opening (23) built into said cooking cavity (2) opening into an area (24) disposed between said cooking cavity (2) and the housing (5) of the oven (1), so as to measure the temperature inside said cooking cavity (2) by hot air movement (F) travelling along said at least one thermostat (22) to check the temperature of the cooking cavity (2) and trigger at least one safety measure of the cooking oven (1) as soon as a temperature threshold is crossed, characterised in that said at least one thermostat (22) is a bimetallic thermostat (22) and in that said bimetallic thermostat (22) is disposed near at least one suction zone (32) of at least one fan (10).
- A temperature measurement device in a cooking oven according to claim 1, characterised in that said hot air movement (F) travelling along said at least one bimetallic thermostat (22) is caused by at least one fan (10).
- A temperature measurement device in a cooking oven according to claim 1 or characterised in that said at least one heating means (21) is an electrical heating resistor.
- A temperature measurement device in a cooking oven according to any one of the claims 1 to 3, characterised in that said temperature measurement device (15) is fastened to the cooking cavity (2) by a mounting pad (27).
- A temperature measurement device in a cooking oven according to any one of the claims 1 to 3, characterised in that said temperature measurement device (15) is fastened to said at least one heating means (21).
- A temperature measurement device in a cooking oven according to any one of the claims 1 to 5, characterised in that said at least one bimetallic thermostat (22) is mounted at a first end of one tube (28), said tube (28) comprising an air intake opening (29) at a second end opening onto the inside of the cooking cavity (2) and an air outlet opening (30) built near said at least one bimetallic thermostat (22).
- A temperature measurement device in a cooking oven according to claim 6, characterised in that the air outlet opening (30) of the tube (28) is in air flow connection with a fan (10) located between the housing (5) and the cooking cavity (2).
- A temperature measurement device in a cooking oven according to claim 6 or 7, characterised in that the tube (28) is mounted on a flange (31) of the heating means (21).
- A temperature measurement device in a cooking oven according to any one of the claims 6 to 8, characterised in that a fan (10) comprises at least one suction zone (32) near the air outlet opening (30) of the tube (28).
- A temperature measurement device in a cooking oven according to any one of the claims 1 to 9, characterised in that it comprises two bimetallic thermostats (22) with different temperature setpoints.
- A temperature measurement device in a cooking oven according to any one of the claims 1 to 10, characterised in that the oven (1) has a pyrolitic cleaning mode and in that at least one bimetallic thermostat (22) controls a door (4) lock.
- A temperature measurement device in a cooking oven according to any one of the claims 1 to 11, characterised in that at least one bimetallic thermostat (22) cuts the energy supply of said at least one heating means (21).
- A temperature measurement device in a cooking oven according to any one of the claims 1 to 12, characterised in that at least one bimetallic thermostat (22) is positioned between at least two branches of said at least one heating means (21).
- A cooking oven, characterised in that it comprises a temperature measurement device consistent with any of claims 1 to 13.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0603478A FR2899968B1 (en) | 2006-04-12 | 2006-04-12 | TEMPERATURE MEASURING DEVICE IN A COOKING OVEN AND COOKING OVEN COMPRISING SUCH A TEMPERATURE MEASURING DEVICE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1845311A1 EP1845311A1 (en) | 2007-10-17 |
EP1845311B1 true EP1845311B1 (en) | 2019-03-06 |
Family
ID=37533322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07105948.9A Active EP1845311B1 (en) | 2006-04-12 | 2007-04-11 | Device for measuring the temperature in a cooking oven and cooking oven comprising such a temperature measurement device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1845311B1 (en) |
ES (1) | ES2725080T3 (en) |
FR (1) | FR2899968B1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2935779A1 (en) * | 2008-09-09 | 2010-03-12 | Fagorbrandt Sas | Domestic built-in gas cooking oven and recessed kitchen cabinet assembly for use in kitchen, has channels in which air flows are respectively circulated in identical direction until flows are circulated in space that is located behind oven |
ITMO20090039A1 (en) * | 2009-02-13 | 2009-05-15 | Eurochef Srl | BUILT-IN MILL OVEN |
BRPI1002786A2 (en) * | 2010-07-27 | 2012-04-03 | Whirlpool Sa | baking oven |
DE102010063909A1 (en) * | 2010-12-22 | 2012-06-28 | BSH Bosch und Siemens Hausgeräte GmbH | Cooking appliance and method for monitoring two limit temperatures in a cooking appliance |
EP2655975B1 (en) * | 2010-12-24 | 2017-01-11 | Arçelik Anonim Sirketi | An oven comprising a thermostat |
RU173745U9 (en) * | 2016-12-23 | 2019-09-04 | Николай Егорович Мордвинцев | TEMPERATURE INDICATOR |
EP3798519A1 (en) | 2019-09-30 | 2021-03-31 | Arçelik Anonim Sirketi | A cooking device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB269437A (en) * | 1926-07-19 | 1927-04-21 | Axel Daniel Widstroem | Improvement in heat-accumulating ranges |
GB1130803A (en) | 1966-01-20 | 1968-10-16 | Westinghouse Electric Corp | Improvements in self-cleaning ovens |
DE2621151A1 (en) * | 1976-05-13 | 1977-12-01 | Witte & Co Stephan | Locking device for self cleaning oven door - is operated by bimetal strip and thermostatically controlled blocking motor |
DE3703539A1 (en) * | 1987-02-06 | 1988-08-18 | Buderus Kuechentechnik | DEVICE FOR CONTROLLING THE STEAM PERFORMANCE OF A STEAM-OPERATED COOKER |
DE9112405U1 (en) * | 1991-10-05 | 1993-02-04 | Gaggenau-Werke Haus- Und Lufttechnik Gmbh, 7560 Gaggenau | Locking device for an oven door |
FR2714959A1 (en) * | 1994-01-12 | 1995-07-13 | Scholtes Ets Eugen | Domestic cooking oven. |
US6107605A (en) * | 1997-09-12 | 2000-08-22 | Middleby-Marshall, Inc. | Pressure regulator for steam oven |
-
2006
- 2006-04-12 FR FR0603478A patent/FR2899968B1/en active Active
-
2007
- 2007-04-11 ES ES07105948T patent/ES2725080T3/en active Active
- 2007-04-11 EP EP07105948.9A patent/EP1845311B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
ES2725080T3 (en) | 2019-09-19 |
EP1845311A1 (en) | 2007-10-17 |
FR2899968A1 (en) | 2007-10-19 |
FR2899968B1 (en) | 2008-07-18 |
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