EP0281823A2 - Dispositif de régulation de puissance de producteurs de chaleur chauffés au carburant - Google Patents

Dispositif de régulation de puissance de producteurs de chaleur chauffés au carburant Download PDF

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Publication number
EP0281823A2
EP0281823A2 EP88102494A EP88102494A EP0281823A2 EP 0281823 A2 EP0281823 A2 EP 0281823A2 EP 88102494 A EP88102494 A EP 88102494A EP 88102494 A EP88102494 A EP 88102494A EP 0281823 A2 EP0281823 A2 EP 0281823A2
Authority
EP
European Patent Office
Prior art keywords
fuel
air
main line
ratio
heat
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.)
Withdrawn
Application number
EP88102494A
Other languages
German (de)
English (en)
Other versions
EP0281823A3 (fr
Inventor
Alfred Sinner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Karl Dungs GmbH and Co KG
Original Assignee
Karl Dungs GmbH and Co KG
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 Karl Dungs GmbH and Co KG filed Critical Karl Dungs GmbH and Co KG
Publication of EP0281823A2 publication Critical patent/EP0281823A2/fr
Publication of EP0281823A3 publication Critical patent/EP0281823A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F23N1/00—Regulating fuel supply
    • F23N1/06—Regulating fuel supply conjointly with draught
    • 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
    • F23N2005/181—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of air
    • 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
    • F23N2005/185—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2221/00—Pretreatment or prehandling
    • F23N2221/06—Preheating gaseous fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/13—Measuring temperature outdoor temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/02—Ventilators in stacks
    • F23N2233/04—Ventilators in stacks 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

Definitions

  • the invention relates to a device for regulating the output of fuel-fired, in particular gas-fired, heat generators, comprising a burner, a main line connecting the burner with an air inlet opening, a flow sensor arranged in the main line, and a fuel line opening in the main line in the region between the flow sensor and the burner which is supplied to the main line with a predetermined, constant amount of fuel, a fan which is operatively connected to the main line and which determines the air flow rate in the main line and a the delivery rate of the fan in Dependency on the output signal of the flow sensor and possibly further control device controlling the variables influencing the optimal fuel / air ratio.
  • a heat generator using gas as a fuel with such a device is described in a brochure no. 1.23.202320 from Karl Dungs GmbH & Co., Schorndorf.
  • Such a heat generator can be optimally set for a given heating output by firmly specifying the amount of fuel required to achieve this heating output and supplying the air required for optimal combustion in a controlled manner.
  • the air supply is regulated with the aid of the blower, the output of which is controlled in such a way that the air speed determined by the flow sensor is kept at a predetermined value, which is determined by the control device as a function of variables influencing the amount of air supplied, in particular as a function of the air temperature. can be changed.
  • the known device has the advantage that it does not require complicated control loops in order to change the amount of fuel supplied when the heating power changes and to provide the optimum amount of air for the respective amount of fuel. Rather, if a reduced heating capacity is required, it is sufficient to periodically switch the burner control on and off, as is generally the case in central heating systems. With such burner controls, the nominal output is normally set to the maximum heating requirement of the central heating system. With central heating systems for single-family houses, flats and the like, the heat requirement is not very high, especially Thermal insulation measures are increasingly being used which greatly reduce the heat requirement.
  • the burner controls of such central heating systems are not only used for heating the living rooms, but also for hot water preparation.
  • the heat requirement for hot water preparation is much greater than for the actual heating, if not very large hot water storage facilities are provided and no sensitive shortage of hot water is to be accepted.
  • the burning time of the heat generator is as long as possible, so that the instantaneous heat output does not significantly exceed the respective heat requirement.
  • a change in the heat output by increasing the amount of fuel supplied to the main line while increasing the amount of air supplied would, however, require difficult control processes, because even with slight deviations from the respectively optimal mixing ratio of fuel and air, pollutants develop and ultimately suffocate or tear off Flames and thus the burner may go out, which would have the consequence that the burner would malfunction and would only have to be restarted by hand.
  • the user of a power-controlled heat generator wants to be able to rely on the fact that his device works trouble-free and does not interfere with changes in the operating conditions, such as with strong changes in the outside temperature, but especially when hot water is drawn.
  • the invention has for its object to develop a device of the type mentioned so that it can be adjusted to different heating capacities depending on the respective heat requirements, without losing the optimal setting of the combustion conditions and without complicated control devices required to maintain these optimal conditions are.
  • a heat exchanger is arranged in the main line in front of the flow sensor, which is switched on in the fuel line, that a throttle valve for adjusting the fuel throughput and a flow sensor are arranged behind this throttle valve and the heat exchanger and that the control device is designed to adjust the air throughput to a constant ratio of the flow velocity of gas and air.
  • the quantity of fuel that can be adjusted to the respective heating requirement with the help of the throttle valve is used as a reference variable, which the air quantity is always tracked in the correct ratio by keeping the flow rates of fuel and air in the corresponding lines in a constant ratio. It is then easily possible to change this ratio depending on environmental conditions, in particular on air temperature and humidity, in order to always maintain optimal conditions.
  • the throttle valve for adjusting the fuel throughput in the fuel line upstream of the heat exchanger, in which the fuel can be exposed to strong temperature changes due to the adaptation to the air temperature.
  • the throttle valve can be controlled by variables influencing the heating power, in particular by the room temperature, the flow temperature of a hot water central heating system, the temperature in the reservoir of a system for hot water preparation and the like.
  • the invention is described and explained in more detail below with reference to the embodiment shown in the drawing.
  • the features that can be gathered from the description and the drawing can be used individually or in any combination in other embodiments of the invention.
  • the drawing shows a schematic representation of a heat generator with a device for power control designed according to the invention.
  • the heat generator shown in the drawing has a burner 1, to which a gas / air mixture is supplied via a main line 2.
  • the burner 1 is located within a boiler housing 3, which also encloses the heat exchanger 4 of a heating system.
  • the boiler housing 3 is provided with a vent 5 for the flue gases, in which there is a fan 7 driven by a motor 6.
  • the main line 2 connects the burner 1 to an air inlet opening 8.
  • a temperature sensor 9 and a flow sensor 10 also protrude into the main line. The output signals of these sensors 9, 10 are fed to a control device 11.
  • a fuel line 13 opens into the main line 2 and supplies gas to the main line as fuel.
  • a gas pressure regulator 14 and a throttle valve 15 are located in the fuel line 13 in the flow direction of the gas, which cause a predetermined amount of gas to be supplied to the main line.
  • a heat exchanger 16 switched into the fuel line 3, which is designed as a coil in the illustrated embodiment. Since the heat exchanger 16 is traversed by the air supplied through the main line 2, heat exchange takes place between the gas and the air, with the result that the gas at the outlet of the heat exchanger 16 has the same temperature as the air supplied to the burner 1. Behind the heat exchanger 16 there is a further flow sensor 17 in the line 13, the output signal of which is also fed to the control device 11.
  • the control device 11 is designed such that it controls the speed of the motor used to drive the blower 7 in such a way that the value supplied by the flow sensor 9 arranged in the main line 2 is always in a predetermined ratio to that of the flow sensor 17 in FIG Fuel line 13 delivered value is.
  • control device 11 makes it possible to change the amount of gas supplied to the burner 1 via the fuel line 13 and thus to change the heating output of the burner as desired, because the control device 11 always ensures that the air is always in the correct manner via the main line 2 Ratio is fed.
  • control device 11 varies this predetermined ratio as a function of various influencing variables, in particular as a function of the temperature, which is determined by the temperature sensor 9.
  • a further influencing variable could, for example, be the relative air humidity determined by a sensor (not shown in more detail).
  • throttle valve 15 serves this purpose, the position of which is controlled by a gas regulator 21, which responds to signals supplied by sensors 22.
  • sensors 22 can in particular be thermal sensors which monitor the outside temperature, the room temperature and / or the flow temperature of the heating water in central heating systems and the water temperature in a storage boiler in systems for hot water preparation.
  • shut-off valve 24 can also be located in the line 13 upstream of the flow sensor 17. Shutting off the fuel line 13 has the result that the output signal of the flow sensor 17 indicates the absence of a gas flow, whereupon the control device 11 can also switch off the delivery of air by the engine 6.
  • the invention is not limited to the exemplary embodiment shown, but deviations from it are possible without the scope of the invention leave.
  • the heat exchanger is to be selected from the point of view that temperature balancing between these two substances occurs essentially at all flow rates of air and fuel occurring during operation of the system, i.e. the fuel temperature essentially adjusts to the air temperature in view of the very small amount of fuel.
  • the heat exchanger 16 for the fuel must fit into the air supply main line 2 and should not increase the flow resistance for gas and air excessively, so that on the one hand the gas pressure is sufficient to supply the main line 2 with the necessary amount of gas and on the other hand no blower 7 of excessive power application must find to promote the required amount of air.

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  • 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)
EP88102494A 1987-03-12 1988-02-20 Dispositif de régulation de puissance de producteurs de chaleur chauffés au carburant Withdrawn EP0281823A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3707883 1987-03-12
DE3707883A DE3707883C1 (de) 1987-03-12 1987-03-12 Einrichtung zur Leistungsregelung von brennstoffbefeuerten Waermeerzeugern

Publications (2)

Publication Number Publication Date
EP0281823A2 true EP0281823A2 (fr) 1988-09-14
EP0281823A3 EP0281823A3 (fr) 1988-12-07

Family

ID=6322813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102494A Withdrawn EP0281823A3 (fr) 1987-03-12 1988-02-20 Dispositif de régulation de puissance de producteurs de chaleur chauffés au carburant

Country Status (2)

Country Link
EP (1) EP0281823A3 (fr)
DE (1) DE3707883C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000070267A1 (fr) * 1999-05-14 2000-11-23 Honeywell B.V. Dispositif de regulation pour bruleur de gaz
WO2013117516A1 (fr) 2012-02-09 2013-08-15 Sit La Precisa S.P.A. Con Socio Unico Procédé de contrôle d'un brûleur de chaudière et système de contrôle fonctionnant selon ce procédé

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3818265A1 (de) * 1988-05-28 1989-11-30 Wolfgang Weinmann Regler fuer eine heizungsanlage
DE19824524C2 (de) * 1998-06-02 2002-08-08 Honeywell Bv Regeleinrichtung für Gasbrenner
US6537060B2 (en) 2001-03-09 2003-03-25 Honeywell International Inc. Regulating system for gas burners
JP6458487B2 (ja) * 2014-12-22 2019-01-30 三菱ケミカル株式会社 可燃性ガスと酸素含有ガスの混合方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1551779A1 (de) * 1967-08-08 1970-12-03 Joseph Degen Verfahren zum Betrieb von Rekuperatoren
DE2613175A1 (de) * 1976-03-27 1977-10-06 Maschf Augsburg Nuernberg Ag Vorrichtung zum beschicken eines mit verdampftem fluessiggas zu betreibenden verbrennungsmotors
FR2407428A1 (fr) * 1977-10-31 1979-05-25 Zink Co John Dispositif de prechauffage d'un combustible gazeux destine a alimenter un four concu pour bruler divers gaz
EP0040736A1 (fr) * 1980-05-22 1981-12-02 Siemens Aktiengesellschaft Procédé pour faire fonctionner une installation de brûleur à gazéification/chaudière de chauffage
US4611984A (en) * 1985-07-05 1986-09-16 Gte Products Corporation Temperature compensator for pressure operated fuel regulator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1551779A1 (de) * 1967-08-08 1970-12-03 Joseph Degen Verfahren zum Betrieb von Rekuperatoren
DE2613175A1 (de) * 1976-03-27 1977-10-06 Maschf Augsburg Nuernberg Ag Vorrichtung zum beschicken eines mit verdampftem fluessiggas zu betreibenden verbrennungsmotors
FR2407428A1 (fr) * 1977-10-31 1979-05-25 Zink Co John Dispositif de prechauffage d'un combustible gazeux destine a alimenter un four concu pour bruler divers gaz
EP0040736A1 (fr) * 1980-05-22 1981-12-02 Siemens Aktiengesellschaft Procédé pour faire fonctionner une installation de brûleur à gazéification/chaudière de chauffage
US4611984A (en) * 1985-07-05 1986-09-16 Gte Products Corporation Temperature compensator for pressure operated fuel regulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000070267A1 (fr) * 1999-05-14 2000-11-23 Honeywell B.V. Dispositif de regulation pour bruleur de gaz
WO2013117516A1 (fr) 2012-02-09 2013-08-15 Sit La Precisa S.P.A. Con Socio Unico Procédé de contrôle d'un brûleur de chaudière et système de contrôle fonctionnant selon ce procédé

Also Published As

Publication number Publication date
EP0281823A3 (fr) 1988-12-07
DE3707883C1 (de) 1988-07-21

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