EP2519771A1 - Verfahren und system zur erhöhung der sicherheit bei gasbetriebenen kochvorrichtungen - Google Patents
Verfahren und system zur erhöhung der sicherheit bei gasbetriebenen kochvorrichtungenInfo
- Publication number
- EP2519771A1 EP2519771A1 EP10796074A EP10796074A EP2519771A1 EP 2519771 A1 EP2519771 A1 EP 2519771A1 EP 10796074 A EP10796074 A EP 10796074A EP 10796074 A EP10796074 A EP 10796074A EP 2519771 A1 EP2519771 A1 EP 2519771A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- control valve
- burner
- flame
- flame detector
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
-
- 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
-
- 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
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/06—Fail safe for flame failures
Definitions
- the present invention relates to a method and a system for increasing safety in a cooking device, in particular in a gas range, said cooking device having at least one connected via a manifold to the main gas pipe gas burner, and in the manifold a manually operated gas valve for opening and closing the gas flow and an igniter are present.
- Gas fired cooking appliances consist of at least one, but generally a larger number of gas burners, the ignition of the flame of the gas burner being provided by use of an external spark igniter.
- the gas burner is connected to a main gas line, which has a distributor between gas burner and main gas network.
- the ignition process can be triggered simultaneously by means of a switch located in a burner valve associated with the gas burner in each burner individually or with the aid of a centrally generated ignition signal on all burners, with ignition only on the burners whose valve is open ,
- the designations EV1 to EV4 in FIG. 1 stand for electrically controlled valves, each used for shutting off the gas flow into the distribution pipes for the gas burners B1 to B4.
- T1 to T4 denote the thermocouples arranged around the gas burners B1 to B4, while KL denotes the line of the main gas source.
- Figure 1 shows an example in which the operation can be resumed by electrically operated valves (EV1-EV4) are mechanically operated and the ignition can be provided.
- EV1-EV4 electrically operated valves
- B1-B4 independently carry out the cooking process, burn in the case when one of the burner extinguishes the flame, all other burners that are in operation and their flame continues to burn on. And this clearly creates a new danger in terms of system security.
- Another problem arises with respect to this solution considering that gas fired cooking appliances generally have more than one burner (usually four), and it is a very expensive solution to attach an electrically controlled valve to each gas burner to control the gas flow to interrupt.
- EP 0 727 616 A1 discloses a safety device developed to remedy the above-mentioned safety problems.
- the system in EP 0 727 616 A1 shuts off the gas flow in the main gas source line, rather than in the distribution lines, which obviously makes the cooking device less expensive.
- a child safety device is provided to prevent the extinguished flame of a burner from re-igniting in any unintentional manner.
- the electromagnetic valve continues to block the gas flow coming from the network even if a single burner valve is opened. To re-activate the system, it is necessary to open and close two gas taps at the same time, or to press a separate button for a certain period of time.
- EP 0 727 616 A1 Although additional safety precautions are described in EP 0 727 616 A1, it is known that the measures are not effective in preventing children from improperly activating the safety device's blocking safety system. A child playing with the taps can also open or close two taps at the same time, or press a button long enough to activate the system.
- the safety system proposed in EP 0 727 616 A1 has the In terms of children's play behavior, they do not have a mature level of safety and, if children play with the valves on this cooking device, they may accidentally or unfortunately not work properly.
- An object of the present invention is to provide a safety system for gas cooking appliances in which the above-mentioned disadvantages are eliminated.
- Another object of the present invention is to provide a safety system for gas fired cooking appliances in which it is necessary for the user to use both hands simultaneously to put cooking appliances in the active state.
- Another safety measure proposed in the present invention is that a switch is manually operated, which communicates with an electrically controlled valve, which interrupts the gas flow of the main gas source and at the same time to close and open the tap whose flame has extinguished.
- a gas cooking appliance having a newly designed safety system and a safety system for a gas cooking appliance in which at least one burner is connected to the main gas network via a distributor whose gas flow is controlled by a manually operated gas valve.
- the safety system has a position switch which serves to monitor the position of each gas valve and transmit it as an electrical signal, and further a flame detector adapted to monitor the presence of a flame on a corresponding gas burner as an electrical signal transferred to. It includes an electrically controlled valve installed in the main gas network at a point between the gas inlet point on the unit and any of the gas taps.
- the safety system according to the present invention has a manually operated reset switch in communication with the control valve is working.
- the safety system has a control circuit associated with each of the position switches, flame detectors, and the control valve.
- the control circuit is adapted to open a closed control valve only when simultaneously receiving a signal from the reset switch and a signal from the position switch of the burner whose flame detector has closed the control valve.
- the object of the safety system according to the present invention is to be a measure for the safety of children, which excludes the possibility of unintentional activation of a locked gas flow system, and makes an intentional action necessary for the opening of the gas flow in the device.
- FIG. 1 shows a gas burner system of a gas-operated cooking appliance according to the prior art, wherein electrically controlled valves do not block the gas flow in the main gas network but in the distributors of the gas burners.
- Figure 2 shows the gas burner system of a gas fired cooking appliance as proposed in the present invention.
- the gas flow in a burner system according to the present invention is controlled by the control valve (15) installed at a location in the main gas network (16) before the gas is admitted into the manifold of a burner.
- the control valve (15) installed at a location in the main gas network (16) before the gas is admitted into the manifold of a burner.
- the control circuit (17) sends a signal to the control valve (15) and closes the valve to block the further gas flow in the main gas network (16). As a result, the flames on all burners go out immediately and the status of the system returns to a "locked" mode.
- the control valve (15) has an electromagnetically controlled gas passage, with the receipt of the blocking signal from the control circuit (17) the gas flow locks.
- the control valve (15) has, in addition to the electrically controlled gas passage, a mechanically actuated reset switch (18) which blocks the flow of gas when a user does not manually activate it. If the reset switch (18) is not activated by hand, the control valve (15) locks the gas flow into the network, even if the electrically operated part is open.
- the electrically actuated part of the control valve (15) may generally be an electromagnet form operating at AC line voltage or alternatively at a lower DC voltage source arranged in the safety system proposed by the invention. Since, in an emergency situation, the gas flow in the gas network is blocked, it is not necessary, in contrast to the known systems shown by way of example in FIG. 1, to use electrically controlled valves on each gas tap (11).
- the gas valves (11) according to the present invention are, for the purpose of reducing the cost of the safety system for gas burners, simple manual valves which have no electrically operated closing devices.
- the control circuit (17) constantly controls the status of the burners (12) and the control valves (15).
- the status of the burners can be evaluated by comparing the signals received from a flame detector (13).
- the flame detectors may typically be temperature sensors that report the temperature above or in the vicinity of a burner (12). In this case, the notification of a sudden drop in temperature by a flame detector means that the flame of the burner (12) associated with that flame detector has gone out. Typical sensors generate a potential difference at the millivolt level when exposed to a temperature difference. For this reason, it is appropriate to amplify the received signals before they are compared.
- An operational amplifier circuit can be used for effective and inexpensive amplification.
- control circuit (17) to turn off the system in an even shorter period of time, because upon detection of a flame being extinguished, amplified signals can be compared more easily and more quickly. It is clear that for purposes of determining whether a flame is present or not, different techniques may be used, with these different flame detection techniques, without the content being limited to these should be confined to optical devices or chemical sensors that record burnt or unburned gas.
- the control circuit (17) may typically include analog circuits and logic comparators placed on a circuit board. It is also possible to use a processor in an alternative embodiment and to carry out the same task.
- Each individual gas valve (11) is monitored by a position switch (14) which informs the control circuit (17) as to whether a particular valve (11) is in the "on” or “off” position. This information is required because the control circuit must not interpret all "flame missing" signals as gas leakage because not all burners may be active. In general, when a flame detector (13) reports the absence of a flame, the burner (12) has not been activated by the user.
- the power supply of the control circuit (17) and the connected units in the environment can be provided by the use of a transformer supplied by the mains power supply.
- the safety system may be powered by batteries, preferably by rechargeable batteries, which are permanently connected to the power supply from the mains and therefore recharged when the mains power supply is present.
- the control valve (15) is preferably adapted to allow gas flow only when energized and to interrupt the flow of gas when not energized.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
- Regulation And Control Of Combustion (AREA)
- Control Of Combustion (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2009/10137A TR200910137A2 (tr) | 2009-12-31 | 2009-12-31 | Gazla çalişan pi̇şi̇rme ci̇hazlarinda artirilmiş güvenli̇k sağlamaya yöneli̇k yöntem ve si̇stem |
| PCT/EP2010/070657 WO2011080218A1 (de) | 2009-12-31 | 2010-12-23 | Verfahren und system zur erhöhung der sicherheit bei gasbetriebenen kochvorrichtungen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2519771A1 true EP2519771A1 (de) | 2012-11-07 |
| EP2519771B1 EP2519771B1 (de) | 2016-03-23 |
Family
ID=43770628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10796074.2A Active EP2519771B1 (de) | 2009-12-31 | 2010-12-23 | Verfahren und system zur erhöhung der sicherheit bei gasbetriebenen kochvorrichtungen |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9612019B2 (de) |
| EP (1) | EP2519771B1 (de) |
| CN (1) | CN102686950B (de) |
| ES (1) | ES2566548T3 (de) |
| TR (1) | TR200910137A2 (de) |
| WO (1) | WO2011080218A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2399893B1 (es) * | 2011-09-20 | 2014-09-02 | Coprecitec, S.L. | Aparato de cocción a gas y método asociado a dicho aparato de cocción a gas |
| TR201109716A2 (tr) | 2011-09-30 | 2012-06-21 | Turas Gaz Armatuerleri Sanayi Ve Ticaret A S | Zaman ayarlı bir mekanik gaz kesme sistemi. |
| ES2430939R1 (es) * | 2012-05-22 | 2014-03-03 | BSH Electrodomésticos España S.A. | Aparato de cocción calentado a gas |
| US10690057B2 (en) | 2017-04-25 | 2020-06-23 | General Electric Company | Turbomachine combustor end cover assembly with flame detector sight tube collinear with a tube of a bundled tube fuel nozzle |
| CN114828715B (zh) | 2020-01-10 | 2025-05-09 | 韦伯-斯蒂芬产品公司 | 指示火焰存在的方法和设备 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3574308A (en) * | 1969-03-07 | 1971-04-13 | Honeywell Inc | Manually reset safety control |
| US3963410A (en) * | 1975-03-20 | 1976-06-15 | Emerson Electric Co. | Control system for domestic gas oven burners |
| US4537345A (en) * | 1982-09-30 | 1985-08-27 | Bbc Industries Inc. | Flame control system for heat exchanger |
| GB2186721A (en) * | 1986-02-18 | 1987-08-19 | Thorn Emi Appliances | Gas-fired cooking appliance |
| JPH03236520A (ja) * | 1990-02-13 | 1991-10-22 | Matsushita Electric Ind Co Ltd | 過熱防止コンロ |
| IL99903A (en) * | 1991-10-30 | 1995-08-31 | Chinsky Moshe | Safety device for gas-powered equipment |
| US5203688A (en) * | 1992-02-04 | 1993-04-20 | Honeywell Inc. | Safe gas control valve for use with standing pilot |
| TW233336B (de) * | 1993-02-26 | 1994-11-01 | Rinnai Kk | |
| US5400766A (en) * | 1993-12-06 | 1995-03-28 | Dillon; John A. | Gas appliance stove safety valve system |
| NL9500317A (nl) | 1995-02-17 | 1996-10-01 | Atag Keukentechniek Bv | Beveiligingsinrichting voor een kooktoestel. |
| US6164958A (en) * | 1999-09-20 | 2000-12-26 | Huang; Tai-Tung | Safety system for gas range |
| US6733276B1 (en) * | 2003-03-04 | 2004-05-11 | Jeffrey R. Kopping | Gas shut-off device |
| EP1528326B1 (de) * | 2003-10-10 | 2013-09-04 | BSH Bosch und Siemens Hausgeräte GmbH | Gaskochfeld sowie Anzeigeverfahren |
| ES2336402B1 (es) * | 2007-09-17 | 2011-02-18 | Bsh Electrodomesticos Espana | Dispositivo de coccion a gas. |
-
2009
- 2009-12-31 TR TR2009/10137A patent/TR200910137A2/xx unknown
-
2010
- 2010-12-23 ES ES10796074.2T patent/ES2566548T3/es active Active
- 2010-12-23 CN CN201080060143.1A patent/CN102686950B/zh active Active
- 2010-12-23 EP EP10796074.2A patent/EP2519771B1/de active Active
- 2010-12-23 US US13/515,319 patent/US9612019B2/en not_active Expired - Fee Related
- 2010-12-23 WO PCT/EP2010/070657 patent/WO2011080218A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011080218A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2519771B1 (de) | 2016-03-23 |
| CN102686950B (zh) | 2015-10-07 |
| US9612019B2 (en) | 2017-04-04 |
| US20120247443A1 (en) | 2012-10-04 |
| CN102686950A (zh) | 2012-09-19 |
| WO2011080218A1 (de) | 2011-07-07 |
| ES2566548T3 (es) | 2016-04-13 |
| TR200910137A2 (tr) | 2011-07-21 |
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