EP1712841A1 - Dispositif électronique et procédé pour contrôler l'évacuation des gaz brûlés, en particulier dans une chaudière - Google Patents

Dispositif électronique et procédé pour contrôler l'évacuation des gaz brûlés, en particulier dans une chaudière Download PDF

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Publication number
EP1712841A1
EP1712841A1 EP05425224A EP05425224A EP1712841A1 EP 1712841 A1 EP1712841 A1 EP 1712841A1 EP 05425224 A EP05425224 A EP 05425224A EP 05425224 A EP05425224 A EP 05425224A EP 1712841 A1 EP1712841 A1 EP 1712841A1
Authority
EP
European Patent Office
Prior art keywords
ventilation devices
burnt gases
boiler
exhaust
processing unit
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Withdrawn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
EP05425224A
Other languages
German (de)
English (en)
Inventor
Claudio Bianchini
Daniele Vecchi
Alberto Benecchi
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.)
Immergas SpA
Original Assignee
Immergas SpA
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 Immergas SpA filed Critical Immergas SpA
Priority to EP05425224A priority Critical patent/EP1712841A1/fr
Publication of EP1712841A1 publication Critical patent/EP1712841A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F23N2233/02—Ventilators in stacks
    • F23N2233/04—Ventilators in stacks with variable speed

Definitions

  • the invention described herein concerns an electronic device and method for managing the exhaust of burnt gases, particularly in a boiler.
  • Boilers currently available on the market need mechanical diaphragms to operate at the appropriate working pressure, these diaphragms being able to change the length and/or cross section of the fume vent so that the boiler can operate at the appropriate working pressure.
  • the aforesaid diaphragms are basically spacers and/or throttling rings with a variable length, shape and cross section.
  • they can be rigid or flexible sleeves with a circular, square, rectangular section or other shape.
  • Another problem consists in the need to install appropriate diaphragms for each type of boiler, which gives rise to considerable production costs as well as warehousing problems.
  • the scope of the invention described herein is to eliminate the above drawbacks by using an electronic device for the management of burnt gases, particularly in a boiler, thereby avoiding the need to install mechanical diaphragms.
  • Another scope of the invention described herein is to build an electronic device for the management of burnt gases able to adapt and connect the boiler fume vent to that of a building without interposing mechanical spacers, for example the above-mentioned diaphragms.
  • Another scope of the invention described herein consists in the use of an electronic device for the management of burnt gases, which can be extremely easy to install and basically universal, in other words compatible with many types of boilers.
  • Another scope consists in achieving the above-mentioned results in the light of a simple, functional and reliable structural solution.
  • the electronic device for managing the exhaust of burnt gases is entirely indicated by the number "1".
  • the device 1 is particularly suitable for being installed in boilers equipped with an exhaust duct for burnt gases and provided with ventilation devices, normally located near an inlet to said duct, capable of ejecting burnt gases coming from the burner.
  • the device 1 comprises a processing unit 2, which is functionally connected to ventilation devices 3 in order to manage their operation.
  • the device 1 comprises a pressure sensor 4 capable of detecting an exhaust pressure of the burnt gases.
  • the sensor 4 is advantageously feedback-connected to the processing unit 2.
  • the device 1 has an operation scheme referred to as "closed ring” instead of a more simple, but definitely imprecise and unreliable, operation scheme referred to as "open ring”.
  • the device 1 has at least one actuator 5 functionally connected to the processing unit 2 in order to control the ventilation devices according to a signal coming from the unit thereof.
  • ventilation devices In traditional boilers, ventilation devices generally comprise a fan, usually of the centrifuge type.
  • the processing unit 2 comprises a programmable functional block 6 capable of generating a signal A for managing the operation of the ventilation devices 3.
  • such functional block 6 preferably comprises software containing the characteristic operation curve for the ventilation devices 3, in order to control their operational parameters according to a thermal input request signal P on the part of a user.
  • the processing unit 2 also comprises electronic devices 7 capable of making a comparison between a signal A generated by the functional block 6, and a ranging signal B coming from the pressure sensor 4.
  • the electronic devices generate a control signal C to be sent to the actuator 5 in order to operate the ventilation devices 3.
  • such electronic devices 7 comprise at least one adder circuit.
  • control signal C forces the actuator 5 to change the rotating speed of the fan.
  • the device 1 preferably comprises a second actuator 8 used for controlling, via an electric signal D, a rate modulator 9 for fuel gas to be fed to the boiler burner.
  • the procedure for managing the exhaust of burnt gases, particularly in a boiler, according to the present invention originally comprises the following phases:
  • the phase concerning the variation of the operating speed of the ventilation devices occurs thanks to at least one electric actuator operated by at least one processing unit capable of making a comparison between said measured pressure value and said preset operation parameters of the ventilation devices.
  • the operation of the electronic device for managing the discharge of burnt gases is as follows:
  • the functional block 6 generates a signal A for managing the operation of the ventilation devices 3, according to the power value requested and/or set by a user.
  • the electronic devices 7 compare signal A with signal B coming from the pressure sensor 4 in order to generate a control signal C to be sent to the actuator 5 and to change the operating speed of the ventilation devices.
  • the invention achieves significant advantages.
  • an electronic device ensures suitable exhaust pressure of the burnt gases, thereby avoiding the installation of mechanical diaphragms.
  • Boilers are usually equipped with a safety valve capable of shutting down the burner in case the exhaust pressure of the burnt gases drops below a minimum value; as a matter of fact, this is an indication of a possible blockage in the exhaust ducts with an apparent danger of overpressures inside the burner.
  • Another advantage is given by the fact that a device according to the invention is extremely easy to install and can be applied to many types of boilers, whether they are new or already operating.
  • a device according to the invention is advantageously inexpensive and easy to build.
EP05425224A 2005-04-14 2005-04-14 Dispositif électronique et procédé pour contrôler l'évacuation des gaz brûlés, en particulier dans une chaudière Withdrawn EP1712841A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05425224A EP1712841A1 (fr) 2005-04-14 2005-04-14 Dispositif électronique et procédé pour contrôler l'évacuation des gaz brûlés, en particulier dans une chaudière

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05425224A EP1712841A1 (fr) 2005-04-14 2005-04-14 Dispositif électronique et procédé pour contrôler l'évacuation des gaz brûlés, en particulier dans une chaudière

Publications (1)

Publication Number Publication Date
EP1712841A1 true EP1712841A1 (fr) 2006-10-18

Family

ID=34943148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05425224A Withdrawn EP1712841A1 (fr) 2005-04-14 2005-04-14 Dispositif électronique et procédé pour contrôler l'évacuation des gaz brûlés, en particulier dans une chaudière

Country Status (1)

Country Link
EP (1) EP1712841A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5075608A (en) * 1974-06-24 1991-12-24 Erdman David M Control system, electronically commutated motor system, draft inducer apparatus and method
EP0909922A1 (fr) * 1997-10-17 1999-04-21 IABER S.p.A. Système de commande combinée à gaz et à air pour commander la combustion d'une chaudière à gaz
EP1351019A2 (fr) * 2002-04-02 2003-10-08 Siemens Building Technologies AG Procédé pour le contrôle du fonctionnement d'un système de régulation de brûleur pour appareil de chauffage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5075608A (en) * 1974-06-24 1991-12-24 Erdman David M Control system, electronically commutated motor system, draft inducer apparatus and method
EP0909922A1 (fr) * 1997-10-17 1999-04-21 IABER S.p.A. Système de commande combinée à gaz et à air pour commander la combustion d'une chaudière à gaz
EP1351019A2 (fr) * 2002-04-02 2003-10-08 Siemens Building Technologies AG Procédé pour le contrôle du fonctionnement d'un système de régulation de brûleur pour appareil de chauffage

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