EP1701096A1 - Procédé pour adapter la puissance de chauffage d'un appareil de chauffage à ventilation forcée aux pertes de pression individuelles d'une conduite d'amenée d'air frais et d'évacuation de gaz d'échappement - Google Patents

Procédé pour adapter la puissance de chauffage d'un appareil de chauffage à ventilation forcée aux pertes de pression individuelles d'une conduite d'amenée d'air frais et d'évacuation de gaz d'échappement Download PDF

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Publication number
EP1701096A1
EP1701096A1 EP05005198A EP05005198A EP1701096A1 EP 1701096 A1 EP1701096 A1 EP 1701096A1 EP 05005198 A EP05005198 A EP 05005198A EP 05005198 A EP05005198 A EP 05005198A EP 1701096 A1 EP1701096 A1 EP 1701096A1
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EP
European Patent Office
Prior art keywords
fan
power
heater
speed
blower
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.)
Ceased
Application number
EP05005198A
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German (de)
English (en)
Inventor
Frank Altendorf
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.)
Vaillant GmbH
Original Assignee
Vaillant GmbH
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 Vaillant GmbH filed Critical Vaillant GmbH
Priority to EP05005198A priority Critical patent/EP1701096A1/fr
Publication of EP1701096A1 publication Critical patent/EP1701096A1/fr
Ceased 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
    • 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
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/335—Output power or torque
    • 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

Definitions

  • the invention relates to a method for adjusting the device heating power of a fan-assisted heater to the individual pressure losses of a fresh air exhaust gas line system and a method associated therewith to avoid incomplete combustion.
  • the fuel and the combustion air are mixed together in a certain predetermined ratio.
  • a pneumatic or electronic fuel gas-air composite is usually used, in which the fuel gas quantity of the air quantity is adjusted.
  • a heater is connected via a fresh air exhaust pipe to the environment.
  • the resistance which opposes the flow system, vary significantly. This has the consequence that at a predetermined speed of a blower to promote the combustion air flow rate of the flow rate can vary widely. Since a heater usually has a certain rated power, a certain air flow is necessary to achieve this rated power. Therefore, the fan speed must be adapted to the resistance of the fresh air exhaust pipe system. According to the prior art, this is done by measuring the combustion air volume flow via a pressure loss measurement on a throttle. Accordingly, the device power is regulated according to a pressure loss signal.
  • the exhaust gas is sucked in behind the heat exchanger and pressed with positive pressure in the exhaust pipe.
  • fresh air is sucked into the heater.
  • Part of the air is premixed in a burner with fuel gas and then burned. The remaining air flows past the burner into the combustion chamber and dilutes the exhaust gas.
  • the modulation range - ie the range of minimum to maximum heating power could vary significantly. For example, if a high pressure drop allowed only low flow rates of air with standard fan control, then excessive fuel gas would be added to the process, so that the combustion would be incomplete and disproportionate carbon monoxide and hydrocarbon emissions Leave the device. If too much air was conveyed, the combustion zone would become too cool and also high pollutant emissions.
  • the EP 981 025 A1 deals with the adaptation of a heater to an individual air-exhaust system. This is done manually by the installer, who measures the length of the exhaust pipe and inputs it via a manual input device. The blower control now takes place using characteristics stored in a memory. An automatic adjustment does not take place, so that it can not be ruled out that the adjustment is made incorrectly or not at all, so that the operation is impaired.
  • the invention has for its object to provide a method for checking a fresh air-Abgassystems a blower-assisted heater with the fan in the exhaust pipe downstream of the heat exchanger, which prevents incomplete and unhygienic combustion.
  • the object is achieved according to the features of independent claim 1, characterized in that the blower power is detected at a predetermined fan speed and when exceeding a predetermined limit of the case to be avoided (fresh air exhaust pipe system on the fresh air and / or exhaust side too long, whole or partially blocked) is detected.
  • the blower speed is detected at a predetermined blower power as an alternative to this and detected when exceeding a predetermined limit value of the case to be avoided.
  • the blower power is detected by means of a pulse width modulation signal.
  • the reference values are stored in a memory of the device control.
  • FIG. 1 shows a heating device 1 with a fresh-air exhaust gas line system 2.
  • the components of the heating device 1 are located within a vacuum chamber 13, a burner 9 is located in a combustion chamber 11, which opens into a heat exchanger 10.
  • the heat exchanger 10 is connected via an exhaust manifold 12 with the fresh air exhaust pipe system 2.
  • the blower 5 has a motor 14, which in turn is connected to the controller 3 and also a speed detection 6 and has a power detection 7.
  • On the input side of the burner 9 is the fuel gas supply with a controllable fuel gas valve 4, which is connected to the controller 3.
  • the control 3 has a memory 8.
  • the controller 3 controls the motor 14 of the blower 5, after which the blower 5 supplies a certain volume flow.
  • the control 3 accordingly controls the controllable gas valve 4, so that a certain gas volume flow is supplied to the injectors of the burner 9.
  • Fresh air primary air
  • the fuel gas-air mixture flows into the burner 9 and burns in the combustion chamber 11 together with secondary air, which flows past the burner and the flame is supplied.
  • the exhaust gas mixes with tertiary air, which also flows to the exhaust gas.
  • the diluted exhaust gases flow through the heat exchanger 10 and thereby give off their heat to a not further illustrated heating network.
  • FIG. 2 shows typical power pressure losses and speed characteristics of a blower as a function of the volume flow.
  • the volumetric flow is plotted on the X-axis, the electrical power, the pressure loss and the speed on the Y-axis. It is known that the electrical power consumption of a fan is dependent on the pressure loss of the line system, the flow rate and the speed of the fan.
  • Line 22 shows a line of constant speed n 1 over variable volumetric flow, line 20 the matching electrical input power as a function of the volumetric flow and this constant first speed n 1 .
  • Line 21 shows the pressure loss as a function of the variable volume flow and the constant speed n 1 .
  • Line 25 shows a line of constant speed n 2 which is higher than n 1 .
  • line 23 shows the electrical power consumption as a function of the variable volumetric flow and the constant speed n 2 .
  • Line 24 shows the pressure loss as a function of the variable volume flow and the constant speed n 2 .
  • the heater is connected to a reference fresh air exhaust pipe system, which is also the shortest permissible fresh air exhaust pipe system for the example case.
  • a reference fresh air exhaust pipe system which is also the shortest permissible fresh air exhaust pipe system for the example case.
  • P el, 1, I index Arabic numeral: speed, index Roman numeral: volume flow
  • This point is labeled 26 in the diagram. If, in the real state, the heating system is connected to an unknown fresh air exhaust gas line system, which has a higher pressure loss than the reference system, then the system is operated at the same speed n 1 . It turns a lesser volume flow v ⁇ II , as can be seen on the line 20. At point 27, a power P el, 1, II is measured.
  • Line 29 illustrates at which speed which electrical power sets.
  • the point 26 illustrates the reference point with the predetermined fresh-air exhaust pipe system and the point 28 the set point in the fresh air-exhaust pipe system to be adapted. With the adapted line system and the predetermined speed n 1 , the Point 27, wherein a corresponding electric power P el, 11, II can be measured.
  • the characteristic curve 29 is determined in laboratory tests.
  • FIG. 4 shows a likewise determined in the laboratory curve 30, which illustrates how high the target speed should be at a corresponding measured electrical power.
  • the point 26 again represents the reference point. If, as explained in FIG. 3, an electrical power consumption P el, 1, II is measured, it is known from laboratory experiments that this electrical power consumption is significant for a specific pressure loss. In order to achieve the same volume flow v ⁇ 1 , an increased speed n 2 is required.
  • the characteristic curve 30 includes possible for all pressure losses fresh air off-gas line systems, the assignment of the necessary rotational speed n of the blower to achieve the reference flow rate V I as a function of the measured blower output P el, 1 at the reference rotation speed n. 1
  • the conveyed air volume flow is thus determined via the measurement of the fan speed in conjunction with the electric fan power, which is then assigned the corresponding amount of fuel gas and supplied accordingly.
  • the range of modulation of the heater is determined by the calculated minimum speed and maximum speed.
  • the speed of the fan is detected for example by a Hall sensor.
  • the blower output results from the product of current and voltage, which act on the blower.
  • any other measuring method for determining the blower (device) power can also be used according to the invention.
  • the absorbed electric fan power decreases the further the delivered volume flow is throttled.
  • the point 32 illustrates the recorded electrical power P el1,0 for the speed n 1 without volume flow promotion .
  • the fresh air exhaust pipe system is completely closed.
  • the recorded electrical power consumption of the blower motor is measured.
  • the measured value is stored and stored, for example, in the memory of the control of the heater.
  • a heater is now individually connected to an air and exhaust pipe, it can be checked whether a complete blockage of the air and exhaust pipe is present. For this purpose, e.g. after the initial startup or before each heating operation, the above defined fan speed is approached and checked whether the recorded electrical power consumption of the fan motor is above the determined reference value. If this is the case, there is no complete obstruction of the air / exhaust path. If only the minimum recorded electric fan power is measured, then there is a complete blockage of the air / exhaust path. In this case, the device electronics generates an error message and prevents the burner of the heater from operating. In order to also consider series variations and also an almost completely closed line, it makes sense that the reference value is slightly larger than the experimentally determined value.
  • a stoichiometric fuel gas-air ratio is necessary. This requires a certain minimum volume flow of combustion air. If the exhaust pipe is clogged in whole or in part or too long, the fuel gas volume flow corresponding to the heat load still flows, as is the case, but no correspondingly required combustion air flow. As a result, the combustion is incomplete; it produces carbon monoxide and unburned hydrocarbon emissions. Since with stoichiometric combustion, the amount of combustion air corresponds to about ten times the amount of fuel gas, the Abgasvolumentrom is mainly caused by the fuel gas volume.
  • the heater shuts off when a predetermined minimum exhaust gas flow is not reached.
  • the speed can be measured.
  • the power can be varied, for example, by changing the voltage or the pulse width modulation signal.

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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)
EP05005198A 2005-03-10 2005-03-10 Procédé pour adapter la puissance de chauffage d'un appareil de chauffage à ventilation forcée aux pertes de pression individuelles d'une conduite d'amenée d'air frais et d'évacuation de gaz d'échappement Ceased EP1701096A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05005198A EP1701096A1 (fr) 2005-03-10 2005-03-10 Procédé pour adapter la puissance de chauffage d'un appareil de chauffage à ventilation forcée aux pertes de pression individuelles d'une conduite d'amenée d'air frais et d'évacuation de gaz d'échappement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05005198A EP1701096A1 (fr) 2005-03-10 2005-03-10 Procédé pour adapter la puissance de chauffage d'un appareil de chauffage à ventilation forcée aux pertes de pression individuelles d'une conduite d'amenée d'air frais et d'évacuation de gaz d'échappement

Publications (1)

Publication Number Publication Date
EP1701096A1 true EP1701096A1 (fr) 2006-09-13

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EP05005198A Ceased EP1701096A1 (fr) 2005-03-10 2005-03-10 Procédé pour adapter la puissance de chauffage d'un appareil de chauffage à ventilation forcée aux pertes de pression individuelles d'une conduite d'amenée d'air frais et d'évacuation de gaz d'échappement

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012016606A1 (de) * 2012-08-23 2014-02-27 Robert Bosch Gmbh Verfahren zur Regelung einer Heizeinrichtung und Heizeinrichtung
EP3382277A1 (fr) * 2017-03-27 2018-10-03 Siemens Aktiengesellschaft Détection d'une bâche

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5222888A (en) * 1991-08-21 1993-06-29 Emerson Electric Co. Advanced proof-of-rotation switch
US5682826A (en) * 1993-02-22 1997-11-04 General Electric Company Systems and methods for controlling a draft inducer for a furnace
EP0823774A1 (fr) * 1996-07-12 1998-02-11 FHP Motors GmbH Convertisseur de fréquence pour opération d'un moteur asynchrone triphasé
EP0981025A2 (fr) 1998-08-19 2000-02-23 Wolf GmbH Dispositif et procédé de réglage de vitesse de rotation d'un ventilateur d'un dispositif de chauffage à gaz, notamment une chaudière à gaz
EP1236957A2 (fr) * 2001-03-01 2002-09-04 Robert Bosch Gmbh Procédé et dispositif d'adaptation d'un appareil de chauffage à brûleur à un système d'évacuation d'air/de gaz brûlés
US6462494B1 (en) * 1999-03-23 2002-10-08 Ebm Werke Gmbh & Co. Fan with preset characteristic curve
FR2824628A1 (fr) * 2001-05-11 2002-11-15 Wilo Salmson Components Chaudiere a extraction de fumee
EP1519113A2 (fr) * 2003-09-23 2005-03-30 Vaillant GmbH Procédé pour adapter la puissance de chauffage d'un appareil de chauffage à ventilation forcée aux pertes de pression individuelles d'une conduite d'amenée d'air frais et d'évacuation de gaz d'échappement

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5222888A (en) * 1991-08-21 1993-06-29 Emerson Electric Co. Advanced proof-of-rotation switch
US5682826A (en) * 1993-02-22 1997-11-04 General Electric Company Systems and methods for controlling a draft inducer for a furnace
EP0823774A1 (fr) * 1996-07-12 1998-02-11 FHP Motors GmbH Convertisseur de fréquence pour opération d'un moteur asynchrone triphasé
EP0981025A2 (fr) 1998-08-19 2000-02-23 Wolf GmbH Dispositif et procédé de réglage de vitesse de rotation d'un ventilateur d'un dispositif de chauffage à gaz, notamment une chaudière à gaz
US6462494B1 (en) * 1999-03-23 2002-10-08 Ebm Werke Gmbh & Co. Fan with preset characteristic curve
EP1236957A2 (fr) * 2001-03-01 2002-09-04 Robert Bosch Gmbh Procédé et dispositif d'adaptation d'un appareil de chauffage à brûleur à un système d'évacuation d'air/de gaz brûlés
FR2824628A1 (fr) * 2001-05-11 2002-11-15 Wilo Salmson Components Chaudiere a extraction de fumee
EP1519113A2 (fr) * 2003-09-23 2005-03-30 Vaillant GmbH Procédé pour adapter la puissance de chauffage d'un appareil de chauffage à ventilation forcée aux pertes de pression individuelles d'une conduite d'amenée d'air frais et d'évacuation de gaz d'échappement
AT412902B (de) * 2003-09-23 2005-08-25 Vaillant Gmbh Verfahren zur anpassung der geräteheizleistung eines gebläseunterstützten heizgerätes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012016606A1 (de) * 2012-08-23 2014-02-27 Robert Bosch Gmbh Verfahren zur Regelung einer Heizeinrichtung und Heizeinrichtung
EP3382277A1 (fr) * 2017-03-27 2018-10-03 Siemens Aktiengesellschaft Détection d'une bâche
US11231174B2 (en) 2017-03-27 2022-01-25 Siemens Aktiengesellschaft Detecting blockage of a duct of a burner assembly

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