EP0355953B1 - Premix type multiport burner - Google Patents
Premix type multiport burner Download PDFInfo
- Publication number
- EP0355953B1 EP0355953B1 EP89305507A EP89305507A EP0355953B1 EP 0355953 B1 EP0355953 B1 EP 0355953B1 EP 89305507 A EP89305507 A EP 89305507A EP 89305507 A EP89305507 A EP 89305507A EP 0355953 B1 EP0355953 B1 EP 0355953B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- port
- ports
- probe
- flame
- 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.)
- Expired - Lifetime
Links
Images
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
- F23N5/107—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using mechanical means, e.g. safety valves
-
- 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
- F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
- F23N2225/16—Measuring temperature burner temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/28—Fail safe preventing flash-back or blow-back
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
Definitions
- the present invention relates to a premix type multiport burner.
- Such burners comprise a plenum chamber for receiving fuel and air for mixing within the chamber before passage to the burner outlet.
- the outlet is formed by one of the walls of the chamber, which wall will contain a multitude of ports through which the fuel/air mixture can pass for combustion.
- DE-A1-3636294 discloses a typical burner of this type in which the outlet is formed by a plate having a multitude of ports through which the fuel/air mixture can pass for combustion, some of the ports being of smaller diameter than others to vary the drag when gasses pass through them.
- Mounted above the ports is an electrode to detect whether there is a flame present above the ports and to send a signal to close a safety valve when the electrode fails to detect a flame as a result of misfire or an ignition failure.
- a premix type multiport burner in which one or more selected ports has or have a bore which at least in part is smaller in area than that of the remaining ports and in which means is provided for detecting the presence of a flame within the confines of the or each selected port.
- the means for detecting the presence of a flame in the selected port or ports is an elongate thermocouple probe.
- the selected port or ports is or are contrived such that following the controlled lightback, the flame is contained within the port and cannot proceed upstream into the space from which the remaining ports receive their supply of air/gas mixture.
- the selected port or ports may have their smaller area bore portion formed by an aperture restricting means located adjacent to the upstream end of the port and the probe may extend through the restricting means with its tip located between the restricting means and the downstream end of the port.
- thermocouple is suitably located not less than eight orifice diameters downstream of the selected port or ports.
- the size of the restricting means is such that the selected port or ports receives or receive a rate of flow of mixture sufficiently lower than the normal ports to ensure that it or they will experience a higher working temperature and so lightback sooner than the remaining ports.
- the outlet wall 1 comprises a slotted plate of for example a ceramic in which each slot 2 forms an outlet for the fuel and air mixture, each slot 2 having an identical bore area.
- an apertured bore restrictor 4 Located in a recess adjacent to the upstream end 3 of one selected port 2′ is an apertured bore restrictor 4, the aperture area being less than that of the rest of the port 2′ and indeed of the remaining ports 2.
- Extending into the port 2′ by way of the restrictor 4 is a thermocouple probe 5 whose tip 6 terminates about six restrictor aperture hydraulic diameters from the upstream end 3 of the port 2′.
- the diameter of the probe 5 is such that there is an annular clearance between the periphery of the probe 5 and the wall of the restrictor aperture to permit the fuel/air mixture to enter the port 2′.
- the probe 5 is connected to a control box 7 which is activated on receiving a signal from the probe 5 to close a valve 8 which controls the supply of fuel to the plenum chamber of the burner.
- the burner outlet wall 10 is generally formed by a number of undulating metal strips 11, each strip 11 being held between a pair of metal spacing elements 12 so that the ports 13 can be formed in the spaces between the strip 11 and the elements 12.
- one strip 12 comprises two distinct portions 14 and 15 which are spaced apart to form the selected port 16 with adjacent spacing.
- an apertured bore restrictor 17 Secured at the upstream end of the port 16 to the strip portions 14 is an apertured bore restrictor 17, the aperture area being smaller than that of the selected port 16 and of the remaining ports 13.
- thermocouple probe 5 Extending into the port 16 by way of the restrictor 17 is the thermocouple probe 5. As with the embodiment previously described, the thermocouple tip 6 also terminates about six restrictor aperture hydraulic diameters from the upstream end of the port 16 and forms an annular clearance between the periphery of the probe 5 and the wall of the restrictor aperture to permit the fuel/air mixture to enter the port 16.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Gas Burners (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8813026 | 1988-06-02 | ||
GB8813026A GB2219388B (en) | 1988-06-02 | 1988-06-02 | Premix type multiport burner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0355953A1 EP0355953A1 (en) | 1990-02-28 |
EP0355953B1 true EP0355953B1 (en) | 1992-03-04 |
Family
ID=10637929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89305507A Expired - Lifetime EP0355953B1 (en) | 1988-06-02 | 1989-06-01 | Premix type multiport burner |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0355953B1 (ja) |
JP (1) | JPH0229507A (ja) |
DE (1) | DE68900918D1 (ja) |
ES (1) | ES2029375T3 (ja) |
GB (1) | GB2219388B (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2254945A (en) * | 1991-04-19 | 1992-10-21 | British Gas Plc | Thermoelectric sensor for a gas burner |
GB9519111D0 (en) * | 1995-09-19 | 1995-11-22 | Willey Robinson Ltd | Gas burner safety device |
DE19734574B4 (de) * | 1997-08-09 | 2006-06-14 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Regeln eines Brenners, insbesondere eines vollvormischenden Gasbrenners |
AU2002214834B2 (en) * | 2000-11-16 | 2006-11-16 | Fernando Teodoro Garcia | Shut-off safety system and gas appliance including same |
AUPR152400A0 (en) * | 2000-11-16 | 2000-12-14 | Garcia, Fernando Teodoro | Shut-off safety system and gas applicance including same |
IT1393070B1 (it) * | 2008-10-24 | 2012-04-11 | Worgas Bruciatori Srl | Termocoppia speciale per bruciatori |
JP2013194995A (ja) * | 2012-03-21 | 2013-09-30 | Nepon Inc | 予混合バーナ |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2340899A (en) * | 1939-10-13 | 1944-02-08 | William R Ray | Thermocouple structure |
GB1348245A (en) * | 1970-07-31 | 1974-03-13 | Parkinson Cowan Appliances Ltd | Gas burner |
FR2308057A1 (fr) * | 1975-04-14 | 1976-11-12 | Chaffoteaux Et Maury | Perfectionnements aux dispositifs de securite pour bruleurs a gaz |
JPS5364832A (en) * | 1976-11-20 | 1978-06-09 | Atago Seisakusho | Sensing system for abnormal combustion in gas burner |
DE3636294A1 (de) * | 1985-10-25 | 1987-04-30 | Rinnai Kk | Brennervorrichtung mit geblaese |
-
1988
- 1988-06-02 GB GB8813026A patent/GB2219388B/en not_active Expired - Fee Related
-
1989
- 1989-06-01 DE DE8989305507T patent/DE68900918D1/de not_active Expired - Lifetime
- 1989-06-01 ES ES198989305507T patent/ES2029375T3/es not_active Expired - Lifetime
- 1989-06-01 EP EP89305507A patent/EP0355953B1/en not_active Expired - Lifetime
- 1989-06-01 JP JP1140241A patent/JPH0229507A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
GB8813026D0 (en) | 1988-07-06 |
GB2219388B (en) | 1992-04-29 |
EP0355953A1 (en) | 1990-02-28 |
JPH0229507A (ja) | 1990-01-31 |
GB2219388A (en) | 1989-12-06 |
JPH0512617B2 (ja) | 1993-02-18 |
ES2029375T3 (es) | 1992-08-01 |
DE68900918D1 (de) | 1992-04-09 |
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