CA2334383A1 - Regulating system for gas burners - Google Patents
Regulating system for gas burners Download PDFInfo
- Publication number
- CA2334383A1 CA2334383A1 CA002334383A CA2334383A CA2334383A1 CA 2334383 A1 CA2334383 A1 CA 2334383A1 CA 002334383 A CA002334383 A CA 002334383A CA 2334383 A CA2334383 A CA 2334383A CA 2334383 A1 CA2334383 A1 CA 2334383A1
- Authority
- CA
- Canada
- Prior art keywords
- gas
- flow
- combustion
- regulating
- signal
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
- F23N5/184—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/02—Measuring filling height in burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/04—Measuring pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2233/00—Ventilators
- F23N2233/06—Ventilators at the air intake
- F23N2233/08—Ventilators at the air intake with variable speed
-
- 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
- F23N2235/16—Fuel valves variable flow or proportional valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/08—Regulating air supply or draught by power-assisted systems
- F23N3/082—Regulating air supply or draught by power-assisted systems using electronic means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
Regulating devices for gas burners are used to provide a gas/air mixture for a burner. Regulating devices are also known which have a variable transmission ratio between gas pressure and combustion air pressure or gas flow and combustion air flow. The required measurement of pressure in all known regulating devices is carried out pneumatically. The inventive regulating device has a sensor (19) that generates an electrical or electronic signal (22) and that is arranged between a first line guiding the gas flow and a second line (14) guiding a combustion air flow. The regulating device is also fitted with a summation device (26) that calculates the electrical or electronic signal (22) of the sensor (19) using an auxiliary signal (27). A
regulating signal (24) generated from an output signal (30) of the summation device (26) is used to alter the gas flow.
regulating signal (24) generated from an output signal (30) of the summation device (26) is used to alter the gas flow.
Description
Regulating system for gas burners The invention relates to a regulating system for gas burners accord:ing to the preamble of claim 1.
Regulating systems for gas burners serve to provide a gas/air mixture, that is, they serve to feed a gas flow and a combustion-air flow to a burner. In this case, the gas flow through a gas valve can be set as a function of the combustion-air pressure. .Such regulating systems have been disclosed by DE 24 27 819 B2, Austrian Patent. 190 195 and DE 37 07 883 Cl.
Regulating systems for gas burners are known in which the transmission ratio between gas pressure and combustion-air pressure or between gas flow and combustion-air flow is variable. In all the known regulating systems, the requisite pressure measurement is carried out by means of a diaphragm, that is pneumatically. However, this pneumatic method ha:> a large number of disadvantages, which all together restrict the range of application of known regulating systems. Thus the hysteresis properties of the diaphragm and the forces acting between the diaphragm and the gas valve restrict the working range and thus the range of appl~_cation. Furthermore, the interplay between the requis:ite small actuating forces and the operating tolerances of the diaphragm, as a result of disturbances such as temperature fluctuations or the like, restricts the range of application of known regulating systems.
Against this background, the problem underlying the present invention is to provide a regulating system for gas burners which avoids the abovementioned disadvantages and thus has a greater range of application.
This problem is solved by a regulating system for gas burners having the features of claim 1.
Further advantageous refinements of the invention follow from the subclaims and the description. A
preferred exemplary embodiment of the invention is explained in more detail below with reference to the drawing, in which:
Fig. 1 shows a regulating system according to the invention with further modules in schematic representation.
The regulating system shown in the drawing serves to provide a gas/air mixture for a gas burner (not shown) .
A gas flow can be fed to the burner (not shown) via a first line 10. A gas-regulating valve 11 and two gas safety valves 12, 13 are assigned to the first line 10 carrying the gas flow. The gas-regulating valve 11 and the gas safety valves 12, 13 may be of any desired design. The construction and mode of operation of gas safety valves <~nd gas-regulating valves are sufficiently known from the prior art.
Furthermore, a combustion-air flow can be fed to the burner_ (not shown) via a second line 14. 'rhe combustion-air flow is produced by a fan 15, 'the rotational speed of which is determined by a motor 16 assigned to the fan 15.
A restrictor o:r choke point 17 is arranged inside the second line 14 carrying the combustion-air flow. In the region downstream of the choke point 17, the first line 10 carrying the gas flow opens into the second line 14 carrying the air flow. In this region, t:he first line 10 carrying the gas flow is terminated by a gas nozzle 18.
A sensor 19 is arranged between the first line 10 carrying the gas flow and the second line 14 carrying the combustion-air flow. The sensor 19 is connected by a first measuring point 20 to the first line 10 carrying the gas flow, namely upstream of the gas nozzle 18 in the direction of flow of the gas.
Furthermore, the ~~ensor 19 is connected by a second measuring point 21 to the second line 14 carrying the combustion-air flow, namely upstream of the choke point 17 in the direction of flow of the combustion air.
The sensor 19 is designed as a differential pressure sensor, in par icular as a flow-rate meter or anemometer. The pressure difference between the gas pressure and the combustion-air pressure can therefore be determined by means of the sensor 19.
If the gas pressure matches the combustion air, the flow through the sensor 19 designed as a flow-rate meter or anemometer is equal to zero. If the combustion-air pressure is higher than the gas pressure, a flow .from the second measuring point 21 in the direction of the first measuring point 20 can be detected. On the other hand, i.f the combustion-air pressure is lower than the gas pressure, a flow from the first measuring point 20 in the direction of the second measuring point 21 can be detected by the sensor 19. The pressure ratios of gas pressure and combustion-air pressure can therefore be determined by the sensor 19 from the rate of flow through the sensor 19 and from the direction of flow.
Depending on these pressure ratios, the sensor 19 generates an electrical or electronic signal 22. This electrical or elecaronic signal 22 is fed to a control unit or regulating unit 23, which generates a regulating signal 24 for an actuator 25 of the gas-regulating valve 11.
To insure a variable transmission ratio between gas pressure and combustion-air pressure or gas flow and combustion-air flow, the electrical or electronic signal 22 of th~~ sensor 19 is balanced with an auxiliary signal 27 in a summing device 26, specifically before the signal 22 is fed to the regulating unit 23.. The output signal 30 of the summing device 26 is therefore fed as input signal to the regulating unit 23, the output signal 30 being an additive superimpo~>ition of the signals 22, 27.
The auxiliary signal 27 is a signal which functionally depends on a rotational speed of the fan 15. The auxiliary signal 27 is obtained in an evaluating device :?$ from a rotational-speed signal 29 of the fan 15 or of the motor 16 of the fan 15. Since the auxiliary signal 27 functionally depends on the rotational speed of the fan 15, it directly follows that the auxiliary signal 27 depends on the combusti.on-air flow or combustion-air pressure.
Unlike the exemplary embodiment shown, it is possible to generate the auxiliary signal 27 in another way. Thus it is not abs;.~lutely necessary for the auxiliary signal 2.7 to be determined from the rotational speed of the fan. It is also conceivable to provide an additional sensor (not shown) for determining the combustion-air flow and thus for generating the auxiliary signal 27.
To provide a gas/air mixture with a variable transmission ratio between gas pressure and combustion-air pressure, the procedure with the regulating system according to the invention is therefore as follows:
An electrical or electronic signal 22 which corresponds to the pressure difference between the gas 5 pressure and the combustion-air pressure is determined by means of the sensor 19. This electrical or electronic signal 22 is balanced with an auxiliary signal 27. To this end, the electrical or electronic signal 22 and the auxiliary signal 27 are added. The auxiliary signal 2'7 depends on the combustion-air flow, in particular on t=he rotational speed of the fan 15.
The output signal 30, determined from the signals 22, 27, of the summing device 26 is fed to a regulating unit 23, which generates a regulating signal 24 fo.r the actuator 25 of the gas-regulating valve 11. In t:his case, the regulating signal 24 is determined in such a way that the regulating unit 23 changes the gas flow to the effect that t:he input signal for the regulating unit 23, that is the signal 30 determined from the signals 22, 27, assumes a value of. zero.
A factor which determines the transmission ratio between gas flow and combustion-air flow can be determined in the Evaluating device 28. This factor is a multiplication factor. The higher this multiplication factor is, the higher is the transmission ratio. The 'ransmission ratio can be varied by varying the multiplication factor.
List of desicrnations Line 11 Gas-regulating valve 5 12 Gas safety valve 13 Gas safety valve 14 Line Fan 16 Motor 10 17 Choke point 18 Gas nozzle 19 Sensor Measuring point 21 Measuring point 15 22 Signal 23 Regulating unit 24 Regulating signal Actuator 26 Summing device 20 27 Auxiliary signal 28 Evaluating device 29 Rotational-speed signal Output signal
Regulating systems for gas burners serve to provide a gas/air mixture, that is, they serve to feed a gas flow and a combustion-air flow to a burner. In this case, the gas flow through a gas valve can be set as a function of the combustion-air pressure. .Such regulating systems have been disclosed by DE 24 27 819 B2, Austrian Patent. 190 195 and DE 37 07 883 Cl.
Regulating systems for gas burners are known in which the transmission ratio between gas pressure and combustion-air pressure or between gas flow and combustion-air flow is variable. In all the known regulating systems, the requisite pressure measurement is carried out by means of a diaphragm, that is pneumatically. However, this pneumatic method ha:> a large number of disadvantages, which all together restrict the range of application of known regulating systems. Thus the hysteresis properties of the diaphragm and the forces acting between the diaphragm and the gas valve restrict the working range and thus the range of appl~_cation. Furthermore, the interplay between the requis:ite small actuating forces and the operating tolerances of the diaphragm, as a result of disturbances such as temperature fluctuations or the like, restricts the range of application of known regulating systems.
Against this background, the problem underlying the present invention is to provide a regulating system for gas burners which avoids the abovementioned disadvantages and thus has a greater range of application.
This problem is solved by a regulating system for gas burners having the features of claim 1.
Further advantageous refinements of the invention follow from the subclaims and the description. A
preferred exemplary embodiment of the invention is explained in more detail below with reference to the drawing, in which:
Fig. 1 shows a regulating system according to the invention with further modules in schematic representation.
The regulating system shown in the drawing serves to provide a gas/air mixture for a gas burner (not shown) .
A gas flow can be fed to the burner (not shown) via a first line 10. A gas-regulating valve 11 and two gas safety valves 12, 13 are assigned to the first line 10 carrying the gas flow. The gas-regulating valve 11 and the gas safety valves 12, 13 may be of any desired design. The construction and mode of operation of gas safety valves <~nd gas-regulating valves are sufficiently known from the prior art.
Furthermore, a combustion-air flow can be fed to the burner_ (not shown) via a second line 14. 'rhe combustion-air flow is produced by a fan 15, 'the rotational speed of which is determined by a motor 16 assigned to the fan 15.
A restrictor o:r choke point 17 is arranged inside the second line 14 carrying the combustion-air flow. In the region downstream of the choke point 17, the first line 10 carrying the gas flow opens into the second line 14 carrying the air flow. In this region, t:he first line 10 carrying the gas flow is terminated by a gas nozzle 18.
A sensor 19 is arranged between the first line 10 carrying the gas flow and the second line 14 carrying the combustion-air flow. The sensor 19 is connected by a first measuring point 20 to the first line 10 carrying the gas flow, namely upstream of the gas nozzle 18 in the direction of flow of the gas.
Furthermore, the ~~ensor 19 is connected by a second measuring point 21 to the second line 14 carrying the combustion-air flow, namely upstream of the choke point 17 in the direction of flow of the combustion air.
The sensor 19 is designed as a differential pressure sensor, in par icular as a flow-rate meter or anemometer. The pressure difference between the gas pressure and the combustion-air pressure can therefore be determined by means of the sensor 19.
If the gas pressure matches the combustion air, the flow through the sensor 19 designed as a flow-rate meter or anemometer is equal to zero. If the combustion-air pressure is higher than the gas pressure, a flow .from the second measuring point 21 in the direction of the first measuring point 20 can be detected. On the other hand, i.f the combustion-air pressure is lower than the gas pressure, a flow from the first measuring point 20 in the direction of the second measuring point 21 can be detected by the sensor 19. The pressure ratios of gas pressure and combustion-air pressure can therefore be determined by the sensor 19 from the rate of flow through the sensor 19 and from the direction of flow.
Depending on these pressure ratios, the sensor 19 generates an electrical or electronic signal 22. This electrical or elecaronic signal 22 is fed to a control unit or regulating unit 23, which generates a regulating signal 24 for an actuator 25 of the gas-regulating valve 11.
To insure a variable transmission ratio between gas pressure and combustion-air pressure or gas flow and combustion-air flow, the electrical or electronic signal 22 of th~~ sensor 19 is balanced with an auxiliary signal 27 in a summing device 26, specifically before the signal 22 is fed to the regulating unit 23.. The output signal 30 of the summing device 26 is therefore fed as input signal to the regulating unit 23, the output signal 30 being an additive superimpo~>ition of the signals 22, 27.
The auxiliary signal 27 is a signal which functionally depends on a rotational speed of the fan 15. The auxiliary signal 27 is obtained in an evaluating device :?$ from a rotational-speed signal 29 of the fan 15 or of the motor 16 of the fan 15. Since the auxiliary signal 27 functionally depends on the rotational speed of the fan 15, it directly follows that the auxiliary signal 27 depends on the combusti.on-air flow or combustion-air pressure.
Unlike the exemplary embodiment shown, it is possible to generate the auxiliary signal 27 in another way. Thus it is not abs;.~lutely necessary for the auxiliary signal 2.7 to be determined from the rotational speed of the fan. It is also conceivable to provide an additional sensor (not shown) for determining the combustion-air flow and thus for generating the auxiliary signal 27.
To provide a gas/air mixture with a variable transmission ratio between gas pressure and combustion-air pressure, the procedure with the regulating system according to the invention is therefore as follows:
An electrical or electronic signal 22 which corresponds to the pressure difference between the gas 5 pressure and the combustion-air pressure is determined by means of the sensor 19. This electrical or electronic signal 22 is balanced with an auxiliary signal 27. To this end, the electrical or electronic signal 22 and the auxiliary signal 27 are added. The auxiliary signal 2'7 depends on the combustion-air flow, in particular on t=he rotational speed of the fan 15.
The output signal 30, determined from the signals 22, 27, of the summing device 26 is fed to a regulating unit 23, which generates a regulating signal 24 fo.r the actuator 25 of the gas-regulating valve 11. In t:his case, the regulating signal 24 is determined in such a way that the regulating unit 23 changes the gas flow to the effect that t:he input signal for the regulating unit 23, that is the signal 30 determined from the signals 22, 27, assumes a value of. zero.
A factor which determines the transmission ratio between gas flow and combustion-air flow can be determined in the Evaluating device 28. This factor is a multiplication factor. The higher this multiplication factor is, the higher is the transmission ratio. The 'ransmission ratio can be varied by varying the multiplication factor.
List of desicrnations Line 11 Gas-regulating valve 5 12 Gas safety valve 13 Gas safety valve 14 Line Fan 16 Motor 10 17 Choke point 18 Gas nozzle 19 Sensor Measuring point 21 Measuring point 15 22 Signal 23 Regulating unit 24 Regulating signal Actuator 26 Summing device 20 27 Auxiliary signal 28 Evaluating device 29 Rotational-speed signal Output signal
Claims (3)
1. A regulating system for gas burners for providing a gas/air mixture, namely for feeding a gas flow and a combustion-air flow to a burner, the transmission ratio between gas pressure and combustion-air pressure being variable, having the following features:
a) a sensor (19) is arranged between a first line (10) carrying the gas flow and a second line (14) carrying the combustion-air flow, b) the sensor (19) is coupled by a first measuring point (20) to the first line (10) carrying the gas flow and by a second measuring point (21) to the second line (14) carrying the combustion-air flow, c) the sensor (19) generates an electrical or electronic signal (22), d) a summing device (26) balances the electrical or electronic signal (22) of the sensor (19) with an auxiliary signal (27), e) the auxiliary signal (27) functionally depends on the combustion-air flow, f) an output signal (30) of the summing device (26) can be fed to a regulating unit (23), the regulating unit (23) generating a regulating signal (24) which acts on a gas-regulating valve (11) and is thus used for varying the gas flaw.
a) a sensor (19) is arranged between a first line (10) carrying the gas flow and a second line (14) carrying the combustion-air flow, b) the sensor (19) is coupled by a first measuring point (20) to the first line (10) carrying the gas flow and by a second measuring point (21) to the second line (14) carrying the combustion-air flow, c) the sensor (19) generates an electrical or electronic signal (22), d) a summing device (26) balances the electrical or electronic signal (22) of the sensor (19) with an auxiliary signal (27), e) the auxiliary signal (27) functionally depends on the combustion-air flow, f) an output signal (30) of the summing device (26) can be fed to a regulating unit (23), the regulating unit (23) generating a regulating signal (24) which acts on a gas-regulating valve (11) and is thus used for varying the gas flaw.
2. The regulating system as claimed in claim 1, characterized in that the auxiliary signal (27) depends on a rotational speed of a fan (15), the fan (15) providing for the combustion-air flow.
3. The regulating system as claimed in claim 1 or 2, characterized in that the first measuring point (20) is arranged upstream of a gas nozzle (18) in the direction of flow of the gas and the second measuring point (21) is arranged upstream of a choke point (17) in the direction of flow of the combustion air.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19824524.6 | 1998-06-02 | ||
| DE1998124524 DE19824524C2 (en) | 1998-06-02 | 1998-06-02 | Control device for gas burners |
| PCT/EP1999/003671 WO1999063273A1 (en) | 1998-06-02 | 1999-05-27 | Regulating device for a gas burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2334383A1 true CA2334383A1 (en) | 1999-12-09 |
Family
ID=7869611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002334383A Abandoned CA2334383A1 (en) | 1998-06-02 | 1999-05-27 | Regulating system for gas burners |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1082575B1 (en) |
| JP (1) | JP2002517703A (en) |
| KR (1) | KR20010052485A (en) |
| CA (1) | CA2334383A1 (en) |
| DE (2) | DE19824524C2 (en) |
| DK (1) | DK1082575T3 (en) |
| ES (1) | ES2187166T3 (en) |
| WO (1) | WO1999063273A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104094058B (en) * | 2012-02-06 | 2016-10-26 | (株)庆东Navien公司 | Gas-air mixing arrangement for burner |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19922226C1 (en) * | 1999-05-14 | 2000-11-30 | Honeywell Bv | Control device for gas burners |
| DE10056064B4 (en) * | 2000-11-11 | 2005-09-08 | Honeywell B.V. | Method for controlling a gas burner |
| US6434060B1 (en) * | 2001-07-31 | 2002-08-13 | Hewlett-Packard Company | Write pulse limiting for worm storage device |
| DE102005034758B3 (en) * | 2005-07-21 | 2006-08-10 | Honeywell Technologies S.A.R.L. | Method for operating a gas burner comprises actuating one or each gas valve for adjusting the gas stream through a gas line with a running fan depending on a signal from a sensor |
| KR20080037753A (en) * | 2006-10-27 | 2008-05-02 | (주)금산조형연구소 | Combustion system of flame |
| AT509212B1 (en) | 2010-03-01 | 2011-07-15 | Vaillant Group Austria Gmbh | DEVICE AND METHOD FOR REGULATING THE COMBUSTION AIR-AIR CONDITION OF A FUEL-DRIVEN BURNER |
| AT510075B1 (en) | 2010-07-08 | 2012-05-15 | Vaillant Group Austria Gmbh | METHOD FOR CALIBRATING A DEVICE FOR CONTROLLING THE COMBUSTION AIR-AIR CONDITION OF A FUEL-DRIVEN BURNER |
| DE102011117736A1 (en) * | 2011-11-07 | 2013-05-08 | Honeywell Technologies Sarl | Method for operating a gas burner |
| DE102021127223A1 (en) * | 2021-10-20 | 2023-04-20 | Ebm-Papst Landshut Gmbh | Method for model predictive control of a fuel-air mixture of a system and an associated system |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT190195B (en) * | 1954-08-12 | 1957-06-11 | Siemens Ag | Equipment for securing the operation of gas or oil firing |
| NL7308176A (en) * | 1973-06-13 | 1974-12-17 | ||
| GB1571906A (en) * | 1977-11-22 | 1980-07-23 | British Gas Corp | Air fuel gas ratio controls for burners |
| JPS58224226A (en) * | 1982-06-21 | 1983-12-26 | Matsushita Electric Ind Co Ltd | Combustion control device |
| JPS5969611A (en) * | 1982-10-14 | 1984-04-19 | Matsushita Electric Ind Co Ltd | Combustion control device |
| JPS5997421A (en) * | 1982-11-25 | 1984-06-05 | Matsushita Electric Ind Co Ltd | Combustion controlling device |
| JPS602111A (en) * | 1983-06-17 | 1985-01-08 | 株式会社クボタ | Drive apparatus with seedling planter of rice planter |
| US4468192A (en) * | 1983-07-01 | 1984-08-28 | Honeywell Inc. | Control system for controlling the fuel/air ratio of combustion apparatus |
| JPS6080018A (en) * | 1983-10-06 | 1985-05-07 | Matsushita Electric Ind Co Ltd | Gas burning control device |
| JPS6080118A (en) * | 1983-10-07 | 1985-05-08 | Canon Inc | Magnetic recording medium |
| JPS6091335A (en) * | 1983-10-26 | 1985-05-22 | Canon Inc | Film feeding device of camera |
| JPS60122818A (en) * | 1983-12-06 | 1985-07-01 | Matsushita Electric Ind Co Ltd | Device for controlling combustion of gas |
| JPS60164115A (en) * | 1984-02-06 | 1985-08-27 | Matsushita Electric Ind Co Ltd | Gas burning control device |
| JPS62190322A (en) * | 1986-02-18 | 1987-08-20 | Rinnai Corp | Device for controlling combustion |
| DE3707883C1 (en) * | 1987-03-12 | 1988-07-21 | Dungs Karl Gmbh & Co | Device for regulating the output of fuel-fired heat generators |
| JPS63251720A (en) * | 1987-04-07 | 1988-10-19 | Rinnai Corp | Combustion control device |
| GB2237665B (en) * | 1989-10-31 | 1993-09-01 | Potterton Int Ltd | Heating boilers |
| US5634786A (en) * | 1994-11-30 | 1997-06-03 | North American Manufacturing Company | Integrated fuel/air ratio control system |
-
1998
- 1998-06-02 DE DE1998124524 patent/DE19824524C2/en not_active Expired - Fee Related
-
1999
- 1999-05-27 CA CA002334383A patent/CA2334383A1/en not_active Abandoned
- 1999-05-27 EP EP99927777A patent/EP1082575B1/en not_active Expired - Lifetime
- 1999-05-27 DK DK99927777T patent/DK1082575T3/en active
- 1999-05-27 KR KR1020007013605A patent/KR20010052485A/en active IP Right Grant
- 1999-05-27 ES ES99927777T patent/ES2187166T3/en not_active Expired - Lifetime
- 1999-05-27 DE DE59904166T patent/DE59904166D1/en not_active Expired - Lifetime
- 1999-05-27 WO PCT/EP1999/003671 patent/WO1999063273A1/en active IP Right Grant
- 1999-05-27 JP JP2000552437A patent/JP2002517703A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104094058B (en) * | 2012-02-06 | 2016-10-26 | (株)庆东Navien公司 | Gas-air mixing arrangement for burner |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59904166D1 (en) | 2003-03-06 |
| JP2002517703A (en) | 2002-06-18 |
| DE19824524C1 (en) | 2000-02-03 |
| KR20010052485A (en) | 2001-06-25 |
| WO1999063273A1 (en) | 1999-12-09 |
| DE19824524C2 (en) | 2002-08-08 |
| EP1082575B1 (en) | 2003-01-29 |
| DK1082575T3 (en) | 2003-06-23 |
| EP1082575A1 (en) | 2001-03-14 |
| ES2187166T3 (en) | 2003-05-16 |
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| Date | Code | Title | Description |
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