EP4303493A1 - Dispositif de contrôle rapide de flammes à réponse variable en continu - Google Patents

Dispositif de contrôle rapide de flammes à réponse variable en continu Download PDF

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Publication number
EP4303493A1
EP4303493A1 EP22762724.7A EP22762724A EP4303493A1 EP 4303493 A1 EP4303493 A1 EP 4303493A1 EP 22762724 A EP22762724 A EP 22762724A EP 4303493 A1 EP4303493 A1 EP 4303493A1
Authority
EP
European Patent Office
Prior art keywords
injectors
fuel
phase shift
valves
control
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.)
Pending
Application number
EP22762724.7A
Other languages
German (de)
English (en)
Inventor
Remo CARVALHO
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.)
Industrial Atilla Ltda
Original Assignee
Industrial Atilla Ltda
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 Industrial Atilla Ltda filed Critical Industrial Atilla Ltda
Publication of EP4303493A1 publication Critical patent/EP4303493A1/fr
Pending legal-status Critical Current

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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
    • F23N1/005—Regulating fuel supply using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/206—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electrical or electromechanical means
    • 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
    • F23N2235/14—Fuel valves electromagnetically operated
    • 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
    • F23N2235/18—Groups of two or more valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2239/00—Fuels
    • F23N2239/04—Gaseous fuels

Definitions

  • the present invention relates to a fast flame controller with continuously variable response to be used in heating, drying and roasting systems for food products, capable of providing greater accuracy, repeatability and precision in process control.
  • the innovation is directed towards the field of regulation and control of gaseous fuel.
  • Equipment with direct or indirect heating are used in current processes of heating, drying and roasting food products, said processes using electrical devices or apparatuses for burning gaseous fuels as heat sources.
  • valves are employed to control gas flow, serving as a means to adjust flame intensity, capable of controlling the energy input into the process and of indirectly adjusting temperature.
  • valves In order to mitigate these issues, the market employs high-cost valves with refined designs. Such valves are sometimes equipped with mechanical flow linearization through the profile of the seat and actuator assembly, as well as actuation systems using stepper motors or servo motors.
  • Patent EP2923057_B1 titled “Fuel injector calibration and trimming,” employs a control of the gas volume, correcting the amount according to a prior calibration, which indicates losses and differences between nominal and actual injected quantities.
  • Patent US6244525_B1 titled “Fuel injector for an internal combustion engine,” adds rotation to the injection and modifies the injector profile to enhance nozzle response speed and eliminate dead time.
  • This invention aims to provide a fast flame controller with continuously variable response for use in heating, drying and roasting systems for food products, enabling more accurate, repetitive and refined process control.
  • This controller consists of one or a set of electromagnetic or piezoelectric fuel injectors/valves (3) that match the fuel demand of the systems, allowing, through electro electronic actuation, a precise control of the flow of fuel to be burned and an indirect control of the main energy source introduced into the process where the injectors/valves are employed.
  • These fuel injectors/valves (3) comprise: an injection valve provided with a movable needle; a support body; and an electromagnetic or piezoelectric actuator.
  • the apparatus employs one or more processors and circuits for power supply, process sensing and power amplification (1), forming an electronic system to control the flow of fuel through adjustment of injection timings, drive frequency and phase shift (Pulse Width Modulation - PWM) of the fuel injectors/valves (3), which results in instantaneous and repetitive control of flame intensity with a wide linear working range, allowing for a compensation of fuel characteristics and operating conditions, making use of injection phases, when multiple injectors are used, aiming at reducing flame pulsation and enhancing stability.
  • processors and circuits for power supply, process sensing and power amplification (1), forming an electronic system to control the flow of fuel through adjustment of injection timings, drive frequency and phase shift (Pulse Width Modulation - PWM) of the fuel injectors/valves (3), which results in instantaneous and repetitive control of flame intensity with a wide linear working range, allowing for a compensation of fuel characteristics and operating conditions, making use of injection phases, when multiple injectors are
  • the present invention aims at providing a fast flame controller with continuously variable response to be used in heating, drying and roasting systems for food products, capable of providing a more accurate, repetitive and precise control of the processes.
  • the product to be protected consists of one or more processors and circuits for power supply, process sensing and power amplification (1), which, by means of command lines (2), control the gas quantity (4) through one or a set of gaseous fuel injectors/valves (3), providing an appropriate gas output (5) to meet the fuel demand of the heating, drying and roasting systems for food products ( Figure 1 ).
  • Each of these fuel injectors/valves (3) is characterized by comprising: an injection valve provided with a movable needle to regulate the flow of fuel through an injection nozzle; a support body with a feed channel ending at the injection valve; and an electromagnetic or piezoelectric actuator comprising a spring, which tends to keep the needle in a closed position, an electromagnet or piezoelectric crystal and a retainer, arranged inside the support body, against the direction of the spring, mechanically coupled to the needle.
  • said fuel injectors/valves (3) provide a refined control of the flow of fuel to be burned, and a consequent indirect control of the main energy source introduced into the process where the injectors/valves are employed.
  • the processors and circuits for power supply, process sensing, and power amplification (1) form an electronic system to control the flow of fuel through adjustment of injection timings, drive frequency and phase shift (Pulse Width Modulation - PWM) of the fuel injectors/valves (3).
  • the number of fuel injectors/valves (3) will depend on their functional characteristics, flow rate, linearity curve, and on the system's demand where they will be employed. There must be a number of fuel injectors/valves (3) to ensure a suitable compromise between minimum and maximum flame in the burner system employed. It should also be avoided injectors/valves (3) from operating in a nonlinear region by adjusting the injection opening time (T). The combination of the number of fuel injectors/valves (3) and the adjustment of their opening times guarantees flame control.
  • phase shift strategy between the fuel injections of each injector is employed, such as for example: in the case of 2 injectors, a 180° valve opening phase shift ( Figure 2 ); in the case of 3 injectors, a 120° phase shift ( Figure 3 ); in the case of 4 injectors, a 90° phase shift ( Figure 4 ), and so on, wherein the phase shift is inversely proportional to the number of injectors.
  • this system efficiently controls flow of gaseous fuel, guaranteeing a rapid and precise flame intensity control (energy source modulation) with reduced pulsation. All of this comes at a low cost and is suitable for operation, safety and durability conditions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
EP22762724.7A 2021-03-02 2022-03-21 Dispositif de contrôle rapide de flammes à réponse variable en continu Pending EP4303493A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR2021039375 2021-03-02
PCT/IB2022/052542 WO2022185294A1 (fr) 2021-03-02 2022-03-21 Dispositif de contrôle rapide de flammes à réponse variable en continu

Publications (1)

Publication Number Publication Date
EP4303493A1 true EP4303493A1 (fr) 2024-01-10

Family

ID=83155128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22762724.7A Pending EP4303493A1 (fr) 2021-03-02 2022-03-21 Dispositif de contrôle rapide de flammes à réponse variable en continu

Country Status (2)

Country Link
EP (1) EP4303493A1 (fr)
WO (1) WO2022185294A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5590642A (en) * 1995-01-26 1997-01-07 Gas Research Institute Control methods and apparatus for gas-fired combustors
FR2773851B1 (fr) 1998-01-20 2000-03-24 Sagem Injecteur de carburant pour moteur a combustion interne
IT1308113B1 (it) * 1999-06-02 2001-11-29 Sit La Precisa Spa Gruppo valvolare per la modulazione della pressione di erogazione diun gas.
CN1411543A (zh) * 1999-10-18 2003-04-16 肯普阀公司 具有文火系统的电子燃气炉灶控制装置及其方法
US7004749B2 (en) * 2002-08-29 2006-02-28 Noritz Corporation Combustion apparatus
US10240785B2 (en) * 2010-01-28 2019-03-26 Noritz Corporation Driving method for solenoid valve, solenoid valve driving apparatus, and combustion apparatus including same
ITPD20110261A1 (it) * 2011-08-03 2013-02-04 Sit La Precisa Spa Con Socio Unico Metodo e sistema di controllo di una unità valvolare modulante includente un elettromagnete
CA2796614C (fr) 2012-11-21 2015-01-06 Westport Power Inc. Calibrage et compensation d'injecteurs de carburant
DE102014218010A1 (de) 2014-09-09 2016-03-10 Robert Bosch Gmbh Vorrichtung und Verfahren zum Erzeugen eines Signals mit einem einstellbaren Tastverhältnis
JP7116304B2 (ja) * 2018-06-28 2022-08-10 ミツミ電機株式会社 電子制御装置および電子制御用半導体集積回路装置並びにガスコンロ
KR102057972B1 (ko) * 2018-10-29 2019-12-20 린나이코리아 주식회사 가스레인지 전자밸브 제어방법

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WO2022185294A1 (fr) 2022-09-09
WO2022185294A4 (fr) 2022-10-20

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