WO2016162526A1 - Dispositif de sécurité approprié pour brûleurs à gaz - Google Patents

Dispositif de sécurité approprié pour brûleurs à gaz Download PDF

Info

Publication number
WO2016162526A1
WO2016162526A1 PCT/EP2016/057832 EP2016057832W WO2016162526A1 WO 2016162526 A1 WO2016162526 A1 WO 2016162526A1 EP 2016057832 W EP2016057832 W EP 2016057832W WO 2016162526 A1 WO2016162526 A1 WO 2016162526A1
Authority
WO
WIPO (PCT)
Prior art keywords
electromagnetic valve
burner
thermocouple
switch
current
Prior art date
Application number
PCT/EP2016/057832
Other languages
English (en)
Inventor
Marcos Pablo Curto
Andoni Unanue Imaz
Mikel ZURIARRAIN BERASATEGI
Original Assignee
Orkli, S.Coop.
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 Orkli, S.Coop. filed Critical Orkli, S.Coop.
Publication of WO2016162526A1 publication Critical patent/WO2016162526A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/105—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means

Definitions

  • the present invention relates to a safety device adapted for gas burners and a cooking appliance comprising at least one burner and the safety device.
  • Some gas cooking appliances are known to comprise safety means to prevent a cooking utensil arranged on a gas burner comprised in the cooking appliance from overheating, thereby preventing said cooking utensil from being burned, and/or safety means preventing the gas supply passage towards the burner when a thermocouple does not detect the presence of flame in the burner.
  • WO2014/152957A1 discloses a safety system for gas cooking appliances comprising a manual control connected to a valve opening or closing the gas supply passage to the burner, a sensor arranged proximally to the burner, a second sensor arranged proximally to the manual control for detecting the temperature of an area proximal to the manual control, and a controller connected to the valve which closes said valve when the characterization of the flame obtained through values of the sensor proximal to the burner is equal to predetermined values stored in the controller and the second sensor does not detect the temperature of the user's hand around the manual control.
  • the intention is to prevent the cooking appliance from continuing to operate when the user is not present.
  • KR2013032674A discloses a safety device for preventing a cooking utensil from overheating, comprising a thermocouple, a multiprocessor unit and an overheat prevention unit.
  • a terminal of the thermocouple is connected to the multiprocessor unit.
  • the overheat prevention unit comprises a receiving member which receives oil therein, a first electrode connected to an end of the thermocouple and a second electrode which is connected to the multiprocessor unit.
  • US2006/0166154A1 discloses a device to prevent a cooking utensil arranged on a gas burner from overheating due to an excessively long, unintentional use, comprising a thermocouple, an electromagnetic valve generating a magnetic force due to the electromotive force of the thermocouple keeping the gas supply passage towards the burner open as long as said thermocouple detects the presence of flame, and a timer switch which is arranged between a terminal of the thermocouple and a terminal of the electromagnetic valve. The timer switch disconnects the connection between the thermocouple and the electromagnetic valve when a predetermined time is exceeded. Therefore, even though the thermocouple detects a flame in the burner, if a predefined burner operating time is reached, the timer switch cuts off the power supply to the electromagnetic valve such that gas supply passage towards the burner is closed.
  • the object of the invention is to provide a safety device adapted for gas burners and a cooking appliance comprising the safety device, as defined in the claims.
  • the safety device comprises an electromagnetic valve opening or closing the gas supply passage towards at least one burner, a thermocouple connected to the electromagnetic valve keeping the electromagnetic valve open as long as it detects the presence of flame in the burner, and thermoelectric means connected to the electromagnetic valve which are activated depending on the temperature reached in a vessel arranged on the burner.
  • the safety device further comprises a switch connected to thermoelectric means and to the electromagnetic valve, allowing a current generated by the thermoelectric means when said thermoelectric means detect a specific temperature threshold in the vessel to flow towards the electromagnetic valve in the direction opposite the current generated by the thermocouple once a specific difference in potential has been reached in said switch, the current circulating towards the electromagnetic valve in the direction opposite the current generated by the thermocouple being greater than the current generated by the thermocouple.
  • the safety device according to the invention does not require an external power supply once the burner is operating is thereby obtained.
  • This safety device is an autonomous, simple, economical and optimized device.
  • Figure 1 shows a sectional schematic view of a burner of a gas cooking appliance comprising a safety device according to the invention.
  • Figure 2 is a diagram of the electrical circuit of the safety device shown in Figure 1.
  • Figure 1 shows a gas burner 6 of a cooking appliance 20 (partially depicted) comprising a safety device 1 which, on one hand, prevents gas from coming out through the burner 6 when there is no flame, and on the other hand prevents a cooking vessel 7 arranged on the burner 6 from overheating.
  • a safety device 1 which, on one hand, prevents gas from coming out through the burner 6 when there is no flame, and on the other hand prevents a cooking vessel 7 arranged on the burner 6 from overheating.
  • the safety device 1 comprises a safety valve 2 opening or closing the gas supply passage towards the respective burner 6, a thermocouple 3 connected to the safety valve 2 keeping the safety valve 2 open as long as it detects the presence of flame in the burner 6, and thermoelectric means 4 electrically connected to the safety valve 2 which are activated depending on the temperature reached in the vessel 7 arranged on the burner 6.
  • the safety valve 2 is an electromagnetic valve opening or closing the gas supply passage towards the burner 6.
  • Said electromagnetic valve 2 schematically shown in Figure 1 , comprises a body (not depicted) in which there are housed an electromagnet 1 1 , a shutter 12 adapted for sealing the gas supply passage towards the burner 6 against the body of the valve, a moving armature 13 coupled to the shutter 12 and movable together with the shutter 12 between a safety valve open position allowing the gas supply to flow towards the burner 6 and a safety valve closed position in which the shutter 12 closes the gas supply passage towards the burner, and a spring 15 which forces the shutter 12 together with the moving armature 13 to return to the safety valve closed position when the electromagnet 1 1 is not energized.
  • the shutter 12 is coupled to the moving armature 13 through a rod 14.
  • the electromagnet 1 1 is energized either manually or through a specific power supply source, it is kept energized through the thermocouple 3 as long as said thermocouple 3 detects the presence of flame in the burner 6. In said position, the moving armature 13 is in contact with the electromagnet 1 1 (safety valve open position) and the shutter 12 does not close the gas supply passage.
  • the electromagnet 1 1 is no longer energized, i.e., the thermocouple 3 does not detect flame in the burner 6, the spring 15 acts on the shutter 12, moving it together with the moving armature 13 to the safety valve closed position, closing the gas supply passage towards the burner 6.
  • the safety valve 2 further comprises a support 18 of the electromagnet 1 1.
  • the support 18 is made of an electrically conductive material, preferably a metallic material.
  • the electromagnet 1 1 further comprises a core 1 1 a made of a ferromagnetic material and a winding 1 1 b comprising a first end connected to a ground terminal 19 and a second end connected to a phase terminal 14, both terminals 14 and 19 being respectively connected to the phase and ground terminals of the thermocouple 3.
  • the safety valve 2 further comprises a casing 17 which encloses the electromagnet 1 1 , the moving armature 13 and partially the support 18 therein.
  • thermoelectric means 4 comprise at least one thermoelectric sensor which, in the embodiment shown, is supported in the burner 6, in particular it is arranged centered with respect to the burner 6 for the purpose of being arranged centered with respect to the cooking utensil 7 which is placed on the burner 6.
  • thermoelectric means 4 can be arranged proximally to the cooking utensil 7 in any other position.
  • thermoelectric sensor is electrically connected in parallel to the thermocouple 3.
  • the thermoelectric sensor converts at least part of the heat energy generated in the burner 6, when it is operating, into electric energy. Therefore, when the thermoelectric sensor detects a predetermined temperature threshold in the cooking vessel 7, it generates a predeterminated current I2 towards the electromagnetic valve 2.
  • the safety device 1 further comprises a switch 5 electrically connected to the thermoelectric means 4 and to the electromagnetic valve 2, in particular said switch 5 and said thermoelectric means 4 are connected in parallel to the electromagnetic valve 2 and to the thermocouple 3.
  • Said switch 5 allows the current I2 generated by the thermoelectric means 4 to flow towards the electromagnetic valve 2 in the direction opposite the current 11 generated by the thermocouple 3 (keeping the electromagnetic valve 2 energized) once a specific difference in potential has been reached in said switch 5.
  • the thermoelectrics means 4 generate a voltage higher than the voltage generated by the thermocouple 3 in order to safely disable the electromagnetic valve 2 when the switch 5 is activated.
  • the switch 5 operates abruptly, the circulation of current to the electromagnetic valve 2 not being progressive, the switch 5 allowing the circulation of the current I2 through it only when the threshold voltage is achieved.
  • the thermoelectric means 4 generate a voltage so that when a predeterminated temperature is reached in the cooking vessel 7 and the voltage generated by the thermoelectric means 4 at said temperature exceeds the predeterminated threshold voltage of the switch 5, said switch 5 actuates abruptly allowing the circulation of the current to the electromagnetic valve 2 in the direction opposite to the current 11 generated by the thermocouple 3.
  • thermocouple 3 As the current I2 circulating towards the electromagnetic valve 2 through the switch 5, in the direction opposite the current 11 generated by the thermocouple 3, is greater than the current 11 generated by the thermocouple 3, the electromagnetic valve 2 is de-energized, closing the gas supply passage towards the burner 6. In contrast, when a specific difference in potential is not reached in said switch 5, current I2 does not pass through said switch 5, so the thermocouple 3 continues to keep the safety valve 2 energized and the gas supply passage towards the burner open.
  • a safety device 1 not requiring an external power supply once the burner is operating is thereby obtained.
  • This safety device is a simple, economical and optimized device.
  • the switch 5 is an electronic switch, which prevents electric contact failures as occurs with mechanical switches.
  • the switch 5 is a diode. In other embodiments not depicted in the drawings, the switch 5 is a transistor. In other embodiments, the switch could be any other switch element which could actuate abruptly when a predeterminated threshold voltage is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)

Abstract

Cette invention concerne un dispositif de sécurité (1) approprié pour brûleurs à gaz, comprenant une soupape électromagnétique (2) ouvrant ou fermant le passage d'alimentation en gaz vers au moins un brûleur (6), un thermocouple (3) relié à la soupape électromagnétique (2), des moyens thermoélectriques (4) reliés à la soupape électromagnétique (2) et un commutateur (5) connecté aux moyens thermoélectriques (4) et à la soupape électromagnétique (2). Ledit commutateur (5) permet à un courant (I2) généré par les moyens thermoélectriques (4) lorsque lesdits moyens thermoélectriques (4) détectent un seuil de température spécifique dans la cuve (7), de s'écouler vers la soupape électromagnétique (2) dans la direction opposée au courant (I1) généré par le thermocouple (3) une fois qu'une différence de potentiel spécifique a été atteinte dans ledit commutateur (5), le courant (12) généré par les moyens thermoélectriques (4) étant supérieur audit courant (I1) généré par le thermocouple (3).
PCT/EP2016/057832 2015-04-08 2016-04-08 Dispositif de sécurité approprié pour brûleurs à gaz WO2016162526A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15382170.7 2015-04-08
EP15382170.7A EP3078911A1 (fr) 2015-04-08 2015-04-08 Dispositif de sécurité adapté pour des brûleurs à gaz

Publications (1)

Publication Number Publication Date
WO2016162526A1 true WO2016162526A1 (fr) 2016-10-13

Family

ID=52998011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/057832 WO2016162526A1 (fr) 2015-04-08 2016-04-08 Dispositif de sécurité approprié pour brûleurs à gaz

Country Status (2)

Country Link
EP (1) EP3078911A1 (fr)
WO (1) WO2016162526A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109730521A (zh) * 2019-01-28 2019-05-10 广东美集世智能科技有限公司 一种用于厨用电器无线供电的烹饪灶具装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR20180100213A (el) * 2018-05-22 2020-01-22 Ιωαννης Κωνσταντινου Οικονομου Συσκευη καυσης υγραεριου με θερμοζευγος ασφαλειας

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61105025A (ja) * 1984-10-29 1986-05-23 Matsushita Electric Ind Co Ltd ガスコンロの制御装置
US4645124A (en) * 1984-01-18 1987-02-24 Indesit Industria Elettrodomestici Italiana S.P.A. Device to compensate for an external sources' thermic effects on a sensitive element in an automatic control system of the temperature reached by foods in heated vessels
JPH074651A (ja) * 1993-04-19 1995-01-10 Rinnai Corp 燃焼装置
US5769622A (en) * 1995-11-15 1998-06-23 Paloma Industries, Ltd. Gas combustion apparatus
US20060166154A1 (en) 2002-10-11 2006-07-27 Jin-Ha Park Overheat prevention apparatus and gas range having the overheat prevention apparatus
US20100275897A1 (en) * 2009-04-30 2010-11-04 The Brinkmann Corporation Gas cooking appliance having an automatic gas shutoff mechanism
KR20130032674A (ko) 2011-09-23 2013-04-02 동아콘트롤 주식회사 열팽창을 이용한 가스렌지용 과열방지장치
US20140246010A1 (en) * 2013-03-02 2014-09-04 David Deng Heating assembly
WO2014152957A1 (fr) 2013-03-14 2014-09-25 Golomb Mercantile Company Llc Brûleur de sécurité avec arrêt automatique

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645124A (en) * 1984-01-18 1987-02-24 Indesit Industria Elettrodomestici Italiana S.P.A. Device to compensate for an external sources' thermic effects on a sensitive element in an automatic control system of the temperature reached by foods in heated vessels
JPS61105025A (ja) * 1984-10-29 1986-05-23 Matsushita Electric Ind Co Ltd ガスコンロの制御装置
JPH074651A (ja) * 1993-04-19 1995-01-10 Rinnai Corp 燃焼装置
US5769622A (en) * 1995-11-15 1998-06-23 Paloma Industries, Ltd. Gas combustion apparatus
US20060166154A1 (en) 2002-10-11 2006-07-27 Jin-Ha Park Overheat prevention apparatus and gas range having the overheat prevention apparatus
US20100275897A1 (en) * 2009-04-30 2010-11-04 The Brinkmann Corporation Gas cooking appliance having an automatic gas shutoff mechanism
KR20130032674A (ko) 2011-09-23 2013-04-02 동아콘트롤 주식회사 열팽창을 이용한 가스렌지용 과열방지장치
US20140246010A1 (en) * 2013-03-02 2014-09-04 David Deng Heating assembly
WO2014152957A1 (fr) 2013-03-14 2014-09-25 Golomb Mercantile Company Llc Brûleur de sécurité avec arrêt automatique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109730521A (zh) * 2019-01-28 2019-05-10 广东美集世智能科技有限公司 一种用于厨用电器无线供电的烹饪灶具装置
CN109730521B (zh) * 2019-01-28 2024-03-26 广东美集世智能科技有限公司 一种用于厨用电器无线供电的烹饪灶具装置

Also Published As

Publication number Publication date
EP3078911A1 (fr) 2016-10-12

Similar Documents

Publication Publication Date Title
US9347665B2 (en) Device for controlling gas supply to a burner
US8851884B2 (en) Control system for the ignition of a gas burner
US11536452B2 (en) Valve arrangement for a gas burner
EP2783161B1 (fr) Système de commande et d'allumage de flamme
US11193673B2 (en) Method and apparatus for controlling operation of bake and broil elements in an electric oven
MX2012000472A (es) Dispositivo de seguridad contra fugas de gas combustible para aparatos domesticos.
US10969112B2 (en) Switch for a cooking appliance
US7268324B2 (en) Electric cooking assembly with hot-warning indicator
JP2009501599A (ja) ボウルの存在及びボウルの温度を検出する電気調理機器に対する検出器
WO2016162526A1 (fr) Dispositif de sécurité approprié pour brûleurs à gaz
KR101710401B1 (ko) 조리기기 및 이의 제어방법
US10816216B2 (en) Method and apparatus for preventing cooktop fires
CN111345115B (zh) 用于厨房用具的温度限制或调节装置
US9214798B1 (en) Range infinite switch with integral GFCI subsystem
GB2336255A (en) Electric cooking appliance energy regulator
JP2003083543A (ja) 加熱調理器具の安全装置
WO2015113638A1 (fr) Ensemble brûleur à gaz et appareil de cuisson au gaz
KR20100120885A (ko) 바이메탈스위치가 구비된 전기매트용 발열제어회로장치
JP2006320608A (ja) 暖房装置と暖房便座およびそれを備えたトイレ装置
CN107468047B (zh) 一种电饭锅
JPH11162312A (ja) サーマルリレー及びこれを用いた制御回路
KR101847062B1 (ko) 가스레인지용 과열방지 장치
US11570853B2 (en) Method for actuating a heating device of a hob, and hob
ES2966343T3 (es) Método para controlar un dispositivo de calentamiento de una encimera de cocción y encimera de cocción
JP2015159908A (ja) トースター

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16719031

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16719031

Country of ref document: EP

Kind code of ref document: A1