EP0240394A1 - Wasser- oder Badgasbrenner - Google Patents

Wasser- oder Badgasbrenner Download PDF

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Publication number
EP0240394A1
EP0240394A1 EP87400503A EP87400503A EP0240394A1 EP 0240394 A1 EP0240394 A1 EP 0240394A1 EP 87400503 A EP87400503 A EP 87400503A EP 87400503 A EP87400503 A EP 87400503A EP 0240394 A1 EP0240394 A1 EP 0240394A1
Authority
EP
European Patent Office
Prior art keywords
current
solenoid valve
water
gas
valve
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.)
Granted
Application number
EP87400503A
Other languages
English (en)
French (fr)
Other versions
EP0240394B1 (de
Inventor
Jean-Claude Charron
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.)
Chaffoteaux et Maury SAS
Original Assignee
Chaffoteaux et Maury SAS
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 Chaffoteaux et Maury SAS filed Critical Chaffoteaux et Maury SAS
Priority to AT87400503T priority Critical patent/ATE57009T1/de
Publication of EP0240394A1 publication Critical patent/EP0240394A1/de
Application granted granted Critical
Publication of EP0240394B1 publication Critical patent/EP0240394B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/085—Regulating fuel supply conjointly with another medium, e.g. boiler water using electrical or electromechanical means

Definitions

  • the invention relates to instantaneous gas water heaters or bath heaters of the type without permanent pilot light operating without batteries and without connection to the electrical network, in which the presence of a small hydraulic turbo-alternator rotated by water which passes through the water heater for the entire duration of a hot water drawing, allows, in conjunction with a small solenoid valve driving a gas valve with differential membrane, automatic production, each time a drawing tap is opened d 'hot water, successive and known following operations: ignition of the gas in the pilot, check of the existence of the flame at the head of this pilot, then control the arrival of the gas in the burner.
  • the object of the invention is, above all, to propose such a solution.
  • the devices of the type in question according to the invention also comprise, in a manner known per se, a small turbo-alternator crossed by the tap water and suitable for generating an alternating current i as a function of this crossing. , means for exploiting this current i for the purpose of lighting a main pilot, means for exploiting the circulation of water of drawing so as to admit the gas on the one hand to the main pilot and on the other hand into a gas inlet chamber, a pneumatic valve for controlling the supply of gas to the burner, valve including the diaphragm valve sealingly divides the gas inlet chamber into two compartments, the opening of this valve being controlled by partial venting, at the level of an auxiliary pilot, of one of the two compartments of the chamber , a solenoid valve to ensure this venting and means for exploiting the current i for the purpose of electrical supply to the solenoid valve so as to control the opening of this solenoid valve only when the main pilot is on, and they are characterized in that the solenoid valve is chosen of a
  • the invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.
  • the water Downstream of the chamber 2, the water is sent in parallel to a relief valve 5 calibrated by a spring 6 and to the turbine 8 of a small turbo-alternator 9,10, these two paths being combined at the same outlet. 7.
  • This outlet 7 is placed in communication with the second chamber 41 delimited by the differential membrane 4 and it communicates successively with a water pipe which passes through the heating body (not shown), which pipe is itself extended by the tubing of drawing hot water controlled by a tap (not shown).
  • the 8-10 turbo-alternator is advantageously of the type which has been described in French patent No. 84 04890 filed on March 29, 1984.
  • the turbine 8 is chosen so that the pressure drop of the water passing through it is equal to the pressure difference applied to the membrane 4 when the flow of this water has its minimum value allowing the device to operate.
  • This pressure difference is slightly lower than that which causes the opening of the valve 5 to start.
  • This admission is successively controlled by a gas valve 37 mounted on a rod 42 linked to the center of the membrane 4, then by a differential pneumatic valve 44.
  • a second gas valve 39 also mounted on the rod 42, controls the admission of gas to a main pilot 22 through a pipe 25.
  • the differential pneumatic valve 44 comprises a gas chamber divided into two compartments, one upper 34 and the other lower 35, by a membrane 33 whose central portion forming a valve is applied by a spring 31 against a seat 32 secured to the burner 43.
  • the compartment 34 communicates with the downstream zone of the valve 37.
  • the compartment 35 communicates either with the upstream zone of the valve 37 by a tube 45, or with the atmosphere by a tube 24 terminating in an auxiliary pilot 23, according to a "reversing" lining 27, located in the chamber 35, is applied against an outlet nozzle 26 of the tube 45 or against an inlet nozzle 28 of the tube 24.
  • This lining 27 is constituted by the central portion of a vibrating membrane with very low inertia and with almost instantaneous response, as is known in the field of loudspeakers.
  • the frequency of the beats of the mobile assembly is of the order of a few tens of Hz, being more generally between 15 and 100 Hz, and the electric power necessary to generate these beats is very low, being generally less than 80 mW (with a current intensity generally between 50 and 100 mA).
  • the solenoid valve 30 formed by the assembly of the coil 29, the electromagnet 46, the lining 27 and the nozzles 26 and 28 cooperating with the latter is advantageously constituted in the manner described in French patent n ° 85 08544 filed June 6, 1985.
  • the electrical winding of the electromagnet 46 is connected to the stator winding 10 of the turbo-generator 8-10 by an electronic circuit comprising a diode bridge 11, a photoresistor 16 sensitive to the ignition of the pilot light 22, a temperature sensor 40 sensitive to the temperature of the drawn water, a transistor or other amplification member 15 and electrical connection wires 17 and 18.
  • the stator winding 10 is also connected, by means of a rectifying circuit (diode 12) and filtering (capacitor 13) and a high voltage igniter 14 with recurrent sparks suitable for lighting the pilot light 22.
  • the water valve 5 opens little by little, bypassing the turbine 8.
  • the gas valves 37 and 39 also open, which supplies gas, in addition to compartment 35, compartment 34 and the main pilot 22.
  • the turbo-generator generates electric current, which has the effect of exciting the electrode 21 of the igniter 14 and lighting the main pilot 22.
  • the transmission of the bright light of the black body 20, by the guide 19, to the photoresistor 16, has the effect of causing the ohmic value of the latter to drop in a considerable ratio, in particular of the order of 100 to 1: amplitude of the current which appears at the base of the transistor 15 during the production of each half-wave rectified current by the diode bridge 11, increases in the same proportion and is found on the collector of said transistor in a ratio further amplified by the gain of this transistor.
  • This diode bridge 11 has the effect of rectifying one of the two half-alternations of each alternation of the alter-native current i generated by the stator winding 10 and letting the other half pass unmodified.
  • half-wave, and the half-waves obtained, all of the same polarity are applied to the voice coil 29, one of the connection wires 18 of which is connected to the collector of the transistor 15, its other connection wire 17 being connected to the positive output of the diode bridge 11; the base of transistor 15 is also connected to the positive output of this same bridge 11 in series with on the one hand, the photoresist cell 16, and on the other hand the temperature sensor 40.
  • the latter is preferably constituted by a resistance with a positive temperature coefficient, called PTC, having the known characteristic of exhibiting, from a certain temperature, a very rapid and very significant increase in its ohmic value.
  • PTC positive temperature coefficient
  • the pilot 23 causes a progressive drop in the pressure of the gas in the chamber 35, that is to say under the membrane 33 and, as the pressure in the chamber 34 above this same membrane is constant and substantially equal to the gas supply pressure of the device, the gas pressure differential on either side of the membrane increases and this increase is substantially proportional to the ratio between the duration A, of each half-wave, during which the current in the voice coil exceeds the threshold value I n , and the total duration B of each half-wave, that is to say at the rate of modulation of the width of the slots of operation of the solenoid valve 30.
  • this modulation rate which is expressed by the A / B ratio, increases itself as a function of the amplitude of the half-waves of current from the moment when the value of this amplitude exceeds the threshold current value I n .
  • this amplitude is linked, to the current gain near transistor 15, to the value of the current in the base of this same transistor and that the latter is linked, by Ohm's law, to the ohmic value of the sensor resistive 40, it is understood that, each time the temperature of the hot water produced approaches the temperature T from which the ohmic value of the sensor 40 increases very quickly, the base current of the transistor also decreases very quickly, causing the same rapid decrease in the amplitude of the half-vibrations in the voice coil and, consequently, such a rapid decrease in the modulation rate of the micro-solenoid valve, which results in a decrease in the differential pressure acting on the membrane 33 , which finally lifts towards the seat 32, thereby reducing the gas flow rate to the burner 43.
  • This value T is given the setpoint of the temperature at which one wishes to draw water.
  • the curve of FIG. 6 shows the variations of the differential pressure P 1 -P 2 applied to the membrane 33 (P 1 being the pressure of the gas in the upper compartment 34 and P 2 the pressure of the gas in the lower compartment 35) in function of the A / B ratio between the duration of opening A of the solenoid valve 30 and the duration B of each half-wave of current.
  • the point C of the curve corresponding to the maximum amplitude I m is that beyond which a further increase in the amplitude, resulting in a further increase in the differential pressure P 1 -P 2 ' remains without effect on the gas flow , the latter then having reached its maximum value, corresponding to the maximum lifting of the differential membrane.
  • the value of the A / B ratio corresponding to this point C is here equal to 4/5.
  • Point C in question corresponds to the situation shown schematically in Figure 2 while point D (for which the A / B ratio is equal to 1/3) corresponds to the situation shown schematically in Figure 4 and that point E (for which the A / B ratio is zero) corresponds to the situation shown diagrammatically in FIG. 5.
  • This curve shows that, for the whole range of amplitudes between the threshold value 1 and the maximum value I m , the differential pressure P 1 -P 2 is substantially proportional to the ratio A / B.
  • said calorific power is also regulated as a function of the flow rate of the drawn water since the amplitudes of the alternations of the current i generated by the turbo-alternator are substantially proportional to this flow rate, at least as long as the bypass valve 5 is not fully open.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fluid-Driven Valves (AREA)
  • Resistance Heating (AREA)
  • Control Of Combustion (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Gas Separation By Absorption (AREA)
EP87400503A 1986-03-06 1987-03-06 Wasser- oder Badgasbrenner Expired - Lifetime EP0240394B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87400503T ATE57009T1 (de) 1986-03-06 1987-03-06 Wasser- oder badgasbrenner.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8603189 1986-03-06
FR8603189A FR2595446B1 (fr) 1986-03-06 1986-03-06 Nouveau procede de controle et de modulation du debit de gaz permettant aux chauffe-eau instantanes a gaz du type sans veilleuse permanente et sans pile, de fonctionner en puissance variable proportionnelle au debit d'eau ou avec regulation thermostatique

Publications (2)

Publication Number Publication Date
EP0240394A1 true EP0240394A1 (de) 1987-10-07
EP0240394B1 EP0240394B1 (de) 1990-09-26

Family

ID=9332837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400503A Expired - Lifetime EP0240394B1 (de) 1986-03-06 1987-03-06 Wasser- oder Badgasbrenner

Country Status (7)

Country Link
US (1) US4770161A (de)
EP (1) EP0240394B1 (de)
JP (1) JPS62272013A (de)
AT (1) ATE57009T1 (de)
DE (1) DE3765154D1 (de)
ES (1) ES2018028B3 (de)
FR (1) FR2595446B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0681147A1 (de) * 1994-05-04 1995-11-08 Robert Bosch Gmbh Gasbeheizter Durchlauf-Wassererhitzer
FR2730794A1 (fr) * 1995-02-21 1996-08-23 Sdecc Mecanisme gaz pour chauffe-bains a gaz sans veilleuse permanente a commande electronique

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4852524A (en) * 1988-06-16 1989-08-01 Aerco International, Inc. Gas fired water heater
US5154162A (en) * 1991-10-07 1992-10-13 Chang Che Yuan Gas-fired water heater with combustion-aid supply system
US5297535A (en) * 1992-09-21 1994-03-29 Chi Chang P Ignition device for water heaters
DE19647432C1 (de) * 1996-11-15 1998-02-12 Honeywell Bv Steuerschaltung für ein Gasmagnetventil
DE19954967A1 (de) * 1999-11-16 2001-05-17 Bosch Gmbh Robert Vorrichtung zur Erzeugung einer elektrischen Spannung für Komponenten eines gasbeheizten Wassererhitzers
US6553946B1 (en) 2000-06-09 2003-04-29 Roberrshaw Controls Company Multi-function water heater control device
US20050058959A1 (en) * 2003-09-17 2005-03-17 General Electric Company Gas flow control for gas burners utilizing a micro-electro-mechanical valve
ITPD20060126A1 (it) * 2006-04-05 2007-10-06 Omvl Srl Dispositivo di controllo della erogazione di un gas combustibile in motori a combustione interna.
DE102006053993B3 (de) * 2006-11-16 2008-01-31 Robert Bosch Gmbh Wassererhitzer
DE102012003912B3 (de) * 2012-02-28 2013-02-07 Mertik Maxitrol Gmbh & Co. Kg Armatur für einen Durchlauf-Wassererhitzer
ES1135492Y (es) * 2014-12-11 2015-04-13 Eika S Coop Foco radiante adaptado a una encimera de cocción
US11573032B2 (en) * 2019-07-16 2023-02-07 Rheem Manufacturing Company Water heater pilot operation
CN115370780B (zh) * 2022-08-04 2024-06-04 广东聚德阀门科技有限公司 一种手动和电控复合式燃气阀

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1215731A (fr) * 1958-11-07 1960-04-20 Saunier Duval Appareil de production instantanée d'eau chaude par le gaz avec allumage automatique du brûleur et dispositif de sécurité totale sans veilleuse de contrôle permanente
FR1497608A (fr) * 1966-08-31 1967-10-13 Procédé de réglage de débit d'un fluide et un dispositif pour la mise en oeuvre du procédé
US4434933A (en) * 1980-03-08 1984-03-06 Ckd Controls Limited Gas flow rate control system
WO1985003761A1 (en) * 1984-02-22 1985-08-29 Vulcan Australia Limited Gas heaters and control thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2127263A5 (de) * 1971-03-02 1972-10-13 Saunier Duval
FR2138436B1 (de) * 1971-05-26 1973-05-25 Saunier Duval
FR2407429A2 (fr) * 1977-10-28 1979-05-25 Saunier Duval Perfectionnements aux dispositifs de securite et de commande pour appareils de production instantanee d'eau chaude par le gaz fonctionnant sans veilleuse permanente
GB2038039B (en) * 1978-12-11 1983-08-17 Matsushita Electric Ind Co Ltd Automatic temperature control of water heater
GB2154727B (en) * 1984-02-27 1987-06-24 Rinnai Kk Water heater

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1215731A (fr) * 1958-11-07 1960-04-20 Saunier Duval Appareil de production instantanée d'eau chaude par le gaz avec allumage automatique du brûleur et dispositif de sécurité totale sans veilleuse de contrôle permanente
FR1497608A (fr) * 1966-08-31 1967-10-13 Procédé de réglage de débit d'un fluide et un dispositif pour la mise en oeuvre du procédé
US4434933A (en) * 1980-03-08 1984-03-06 Ckd Controls Limited Gas flow rate control system
WO1985003761A1 (en) * 1984-02-22 1985-08-29 Vulcan Australia Limited Gas heaters and control thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0681147A1 (de) * 1994-05-04 1995-11-08 Robert Bosch Gmbh Gasbeheizter Durchlauf-Wassererhitzer
FR2730794A1 (fr) * 1995-02-21 1996-08-23 Sdecc Mecanisme gaz pour chauffe-bains a gaz sans veilleuse permanente a commande electronique
EP0728990A1 (de) * 1995-02-21 1996-08-28 Saunier Duval Eau Chaude Chauffage - Sdecc S.A. Gasventil für einen elektronisch gesteuerten Badgasbrenner ohne permanente Zündflamme

Also Published As

Publication number Publication date
FR2595446B1 (fr) 1989-02-03
ES2018028B3 (es) 1991-03-16
FR2595446A1 (fr) 1987-09-11
EP0240394B1 (de) 1990-09-26
US4770161A (en) 1988-09-13
DE3765154D1 (de) 1990-10-31
JPS62272013A (ja) 1987-11-26
ATE57009T1 (de) 1990-10-15

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