EP1353126B1 - Hydraulically controlled gas fitting - Google Patents

Hydraulically controlled gas fitting Download PDF

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Publication number
EP1353126B1
EP1353126B1 EP03007464A EP03007464A EP1353126B1 EP 1353126 B1 EP1353126 B1 EP 1353126B1 EP 03007464 A EP03007464 A EP 03007464A EP 03007464 A EP03007464 A EP 03007464A EP 1353126 B1 EP1353126 B1 EP 1353126B1
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EP
European Patent Office
Prior art keywords
valve
gas
hydraulically controlled
sleeve
fitting
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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.)
Expired - Lifetime
Application number
EP03007464A
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German (de)
French (fr)
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EP1353126A2 (en
EP1353126A3 (en
Inventor
Thomas Schmidbauer
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Vaillant GmbH
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Vaillant GmbH
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Priority claimed from AT0183902A external-priority patent/AT412232B/en
Application filed by Vaillant GmbH filed Critical Vaillant GmbH
Priority to AT03007464T priority Critical patent/ATE439553T1/en
Publication of EP1353126A2 publication Critical patent/EP1353126A2/en
Publication of EP1353126A3 publication Critical patent/EP1353126A3/en
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Publication of EP1353126B1 publication Critical patent/EP1353126B1/en
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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
    • 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
    • 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
    • F23N2235/24—Valve details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/04—Heating water

Definitions

  • the invention relates to a hydraulic regulated gas valve for a fuel gas heated continuous water heater.
  • Such gas fittings are characterized in that they adjust the amount of fuel gas that reaches a burner depending on the amount of water to be heated and a knob.
  • an amplification factor fuel gas volume flow to water volume flow
  • Such gas fittings are off FR 2 525 327 A and DE 2 533 910 A known.
  • these gas fittings must have at least two sealing valves which have different control signals.
  • the ionization current in a flame is used as a control signal. If a flame is present at the burner surface, an ionization current can be tapped in the region of the flame. With this ionization current, a valve, the safety valve, can be opened by means of a coil.
  • the other sealing valve is usually the water shortage valve. In this valve, a stroke equivalent to the water volume flow is generated in a water switch. By means of this lifting movement, the water shortage valve can be opened and thus a fuel gas equivalent to the water volume flow can flow through the gas fitting.
  • gas valves often have a valve with which an amplification factor between the fuel gas volume flow and the water volume flow can be set. This adjustment is usually done manually by the operator, who often linearly continuously opens or closes a conical valve linearly by means of a rotary knob.
  • Gas fittings for fuel gas heated continuous water heaters are usually relatively complex, since the various functions are achieved by a mechanism with many deflections.
  • the aim of the invention is to provide a gas valve for fuel gas heated continuous water heater, which is characterized by simple and reliable structure.
  • the valve for adjusting the amplification factor does not have to be a sealing cone valve whose cone is linearly displaced by means of a deflection. Rather, according to the invention, the valve consists of a guide with an opening and a sleeve located therein with slot, wherein the sleeve is guided in the guide and slot and opening are superimposed. In this way, the adjustment of the valve can be done directly without deflection, which simplifies the structure and thus reduces the susceptibility to failure.
  • the valve for adjusting the amplification factor need not be sealing. Rather, a slight leak can be accepted because the function of the valve, the adjustment of the fuel gas flow, but not its total prevention. As a result, can be dispensed with separate seals.
  • valve can be dosed sensitively. It is particularly advantageous if the slot is very narrow at one end of its translation path and its width widens continuously.
  • the guide is part of the housing, which accommodates the components of the gas valve, whereby a component reduction is achieved. It is particularly advantageous if the opening is part of a bushing inserted, since in this way an exchange of the bushing (for example, because of power limitation, GasartCAD, etc.) and higher manufacturing accuracy (housing is usually a die-cast part, which is reworked) is possible.
  • the gas pressure is directed against the opening direction of the water shortage valve. This avoids that e.g. in case of failure or reduction of the closing force of the valve, the valve is opened by the gas pressure.
  • Fig. 1 and Fig. 2 show a gas fitting 20 according to the invention with a housing 25, a knob 1, fuel gas inlet 17, fuel gas outlet 18 with screw 29 for adjusting the burner pressure, Zündgasausgang 19 and water switch port 14.
  • the water switch not shown, is separated by a membrane into two pressure chambers. When warm water tap a differential pressure between the chambers is generated by a Venturi nozzle in the water switch; the differential pressure raises the membrane. As a result, a steadily growing to the amount of water signal is delivered, which is transmitted in the form of a lifting movement to the control pin 15.
  • Fig. 3 is a section through this gas fitting 20 in the initial state (ie no fuel gas flow) to see.
  • the fuel gas inlet 17 opens into a chamber 24, in which a safety valve 5 and a thermomagnet 6, which are coupled together, are located.
  • a sleeve 8 is in a guide 21 with a slot 9.
  • a Zündgasbolzen 3 which ends in the knob 1.
  • a portion of the sleeve 8 forms with a portion of the Zündgasbolzens 3 a Zündgasventil 4, which seals the connection to an annular channel 26.
  • a spring 7 is stretched.
  • the Zündgasbolzen 3 is connected to the knob 1.
  • the sleeve 8 is located on a bushing 11, which has an opening 13 at.
  • a spring 12 which presses against a water shortage valve 10. From the water shortage valve 10, a control pin 15 projects into the water shortage 14th
  • Fig. 4 shows the gas valve 20 in another section. From this perspective, the connection of the Zündgasausgangs 19 and the mechanism for actuating the gas valve 20 is clear.
  • a control cam 2 see. Fig. 13
  • the adjustment knob 1 in conjunction with a screw 16; the function will be described later.
  • Fig. 5 shows the same perspective in a different working position, in the ignition position, in which the connection of the annular channel 26 to Zündgasausgang 19 through the bore 27 is clear.
  • Fig. 6 shows a part of the gas valve 20 in a further step.
  • Fig. 7 is a part of the gas fitting 20 to see in a subsequent step.
  • Fig. 8 shows a portion of the gas valve 20 in the operating condition in which fuel gas from the fuel gas inlet 17 to the fuel gas outlet 18 can flow.
  • Fig. 9 shows the opened water shortage valve 10 in detail.
  • Fig. 10 is a device for adjusting the burner pressure to see.
  • Fig. 11 shows the sleeve 8 in detail with the slot 9 and sealing rings 28.
  • Fig. 12 the ignition gas bolt is shown in detail.
  • Out Fig. 13 goes the interior of the knob 1 with the control cam out.
  • Fig. 14 shows the sleeve 11 with opening 13 and
  • Fig. 15 shows the water shortage valve 10 with control pin 15th
  • Fig. 3 and Fig. 4 is the gas fitting 20 in the initial state in which no fuel gas flows to see.
  • the safety valve 5, the pilot gas valve 4 and the water shortage valve 10 are closed; the opening 13 of the valve for adjusting the amplification factor is closed by the sleeve 8.
  • Fig. 6 the knob 1 manually pushed further, causing the tip of Zündgasbolzens 3 opens the valve disc on the safety valve 5.
  • the pressure movement ends as soon as inside the thermomagnet 6, an anchor plate rests against the iron core of a Elektomagneten.
  • Fuel gas can now from the fuel gas inlet 17 via the chamber 24, through the open safety valve 5 in the chamber 23, from there via the open Zündgasventil 4 in the annular channel 26 and from there via the bore 27 in the Zündgasausgang 19, of which a connection to a pilot burner, not shown, flow.
  • thermo-current holds the anchor plate to the iron core.
  • the knob 1 After releasing the knob 1 is - as in Fig. 7 shown - the knob 1 together with the Zündgasbolzen 3 pushed back by the spring 7, wherein the safety valve 5 remains open in the presence of a pilot flame and a corresponding lonisationstromes by the thermomagnet 6.
  • the gas valve 20 By turning the knob 1, the gas valve 20 is brought into the ready position. While the axial position remains unchanged, the sleeve 8 can be rotated and the variably shaped slot 9 superimposed on the opening 13 to the water shortage valve 10, which is still closed.
  • the adapted on one side to the lateral surface of the sleeve 8 bushing 11 is inserted axially floating and is pressed by a spring 12 to the sleeve 8.
  • the bush 11 with the opening 13 in conjunction with the position of the slot 9 of the sleeve 9 determine the possible amount of flowing gas (with open water deficiency valve 10) or the so-called power preselection.
  • the water shortage valve 10 blocks the fuel gas flow via the fuel gas outlet 18 to the burner, not shown.
  • a signal for opening the water deficiency valve 10 can be given to the control pin 15.
  • the water switch not shown transmits a dependent of the water flow stroke to the control pin 15, which finally presses the water lack valve plate against the gas flow and thus the water shortage valve 10 opens.
  • Fig. 8 shown The fuel gas can now flow from the chamber 23 via the slot 9 and the opening 13 through the open water deficiency valve 10 into the fuel gas outlet 18.
  • the opening cross section of the water deficiency valve 10 and thus the fuel gas volume flow is dependent on the stroke of the control pin 15.
  • Fig. 9 shows the gas valve, in particular the opened water shortage valve 10 with the fuel gas outlet 18th
  • the spring 12 fulfills two functions. First, it ensures a concern of the socket 11 on the sleeve 8 sure; on the other hand, it closes the water shortage valve 10. An expansion of the socket 11, for example, for a gas type change is possible after disassembly of the water deficiency valve 10.
  • the Zündgasventil 4 is performed without the usual flat gasket and without a rotated valve seat, so that the number of parts reduced and the assembly is simplified.
  • the water shortage valve 4 closes in the fuel gas flow direction. Due to the therefore smaller closing spring force 12, the membrane can be reduced in size at the water switch.

Abstract

A hydraulically controlled gas fitting (20) for a gas heated water heater, comprises a valve for adjusting the intensification factor, which fixes the ratio of the gas volume flow to the water volume flow. The valve consists of a sleeve (8) with a slot (9) and a guide (21) with an opening (13). The sleeve is located in the guide so the slot is continually over the opening.

Description

Die Erfindung bezieht sich auf eine hydraulische geregelte Gasarmatur für einen brenngasbeheizten Durchlauf-Wasserheizer.The invention relates to a hydraulic regulated gas valve for a fuel gas heated continuous water heater.

Derartige Gasarmaturen zeichnen sich dadurch aus, dass sie in Abhängigkeit der zu erhitzenden Wassermenge und eines Stellknopfes die Brenngasmenge, die zu einem Brenner gelangt, anpassen. Mittels des Stellknopfes kann ein Verstärkungsfaktor (Brenngasvolumenstrom zu Wasservolumenstrom) eingestellt werden, das heißt, dass letztendlich die Wassertemperatur annähernd über den Knopf eingestellt wird. Derartige Gasarmaturen sind aus FR 2 525 327 A und DE 2 533 910 A bekannt.Such gas fittings are characterized in that they adjust the amount of fuel gas that reaches a burner depending on the amount of water to be heated and a knob. By means of the adjusting knob, an amplification factor (fuel gas volume flow to water volume flow) can be set, which means that ultimately the water temperature is set approximately via the knob. Such gas fittings are off FR 2 525 327 A and DE 2 533 910 A known.

Gemäß Normanforderungen müssen diese Gasarmaturen über mindestens zwei dichtende Ventile, die unterschiedliche Steuersignale haben, verfügen. Häufig wird als ein Steuersignal der lonisationsstrom in einer Flamme verwendet. Ist eine Flamme an der Brenneroberfläche vorhanden, so kann im Bereich der Flamme ein lonisationsstrom abgegriffen werden. Mit diesem lonisationsstrom kann mittels einer Spule ein Ventil, das Sicherheitsventil, geöffnet werden. Bei dem anderen dichtenden Ventil handelt es sich meist um das Wassermangelventil. Bei diesem Ventil wird in einem Wasserschalter eine dem Wasservolumenstrom äquivalente Hubbewegung erzeugt. Mittels dieser Hubbewegung lässt sich das Wassermangelventil öffnen und somit kann eine dem Wasservolumenstrom äquivalente Brenngasmenge durch die Gasarmatur strömen.According to standard requirements, these gas fittings must have at least two sealing valves which have different control signals. Frequently, the ionization current in a flame is used as a control signal. If a flame is present at the burner surface, an ionization current can be tapped in the region of the flame. With this ionization current, a valve, the safety valve, can be opened by means of a coil. The other sealing valve is usually the water shortage valve. In this valve, a stroke equivalent to the water volume flow is generated in a water switch. By means of this lifting movement, the water shortage valve can be opened and thus a fuel gas equivalent to the water volume flow can flow through the gas fitting.

Letztendlich verfügen häufig Gasarmaturen zusätzlich über ein Ventil, mit dem ein Verstärkungsfaktor zwischen Brenngasvolumenstrom und Wasservolumenstrom eingestellt werden kann. Diese Einstellung erfolgt in der Regel manuell vom Bediener, der häufig mittels Drehknopf mittels Umlenkung ein Kegelventil linear kontinuierlich öffnet beziehungsweise schließt.Finally, gas valves often have a valve with which an amplification factor between the fuel gas volume flow and the water volume flow can be set. This adjustment is usually done manually by the operator, who often linearly continuously opens or closes a conical valve linearly by means of a rotary knob.

Gasarmaturen für brenngasbeheizte Durchlauf-Wasserheizer sind in der Regel relativ aufwändig, da die verschiedenen Funktionen über eine Mechanik mit vielen Umlenkungen erreicht werden.Gas fittings for fuel gas heated continuous water heaters are usually relatively complex, since the various functions are achieved by a mechanism with many deflections.

Ziel der Erfindung ist, eine Gasarmatur für brenngasbeheizte Durchlauf-Wasserheizer zu schaffen, die sich durch einfachen und zuverlässigen Aufbau auszeichnet.The aim of the invention is to provide a gas valve for fuel gas heated continuous water heater, which is characterized by simple and reliable structure.

Erfindungsgemäß wird dies durch eine Gasarmatur gemäß den Merkmalen des Anspruchs 1 erreicht. Das Ventil zur Einstellung des Verstärkungsfaktors muss demnach kein dichtendes Kegelventil sein, dessen Kegel mittels Umlenkung linear verschoben wird. Vielmehr besteht erfindungsgemäß das Ventil aus einer Führung mit Öffnung und einer darin befindlichen Hülse mit Schlitz, wobei die Hülse in der Führung geführt wird und Schlitz und Öffnung überlagerbar sind. Auf diese Art kann die Einstellung des Ventils direkt ohne Umlenkung erfolgen, was den Aufbau vereinfacht und somit die Störanfälligkeit reduziert.This is achieved by a gas fitting according to the features of claim 1 according to the invention. The valve for adjusting the amplification factor does not have to be a sealing cone valve whose cone is linearly displaced by means of a deflection. Rather, according to the invention, the valve consists of a guide with an opening and a sleeve located therein with slot, wherein the sleeve is guided in the guide and slot and opening are superimposed. In this way, the adjustment of the valve can be done directly without deflection, which simplifies the structure and thus reduces the susceptibility to failure.

Verfügt die Gasarmatur über die eingangs erwähnten Sicherheits- und Wassermangelventile, die jeweils dichtend sind, so muss das Ventil zur Einstellung des Verstärkungsfaktors nicht dichtend sein. Vielmehr kann eine leichte Undichtigkeit schon deshalb in Kauf genommen werden, weil die Funktion des Ventils, die Einstellung des Brenngasstroms, nicht jedoch seine gänzliche Verhinderung ist. Demzufolge kann auf gesonderte Dichtungen verzichtet werden.If the gas valve has the above-mentioned safety and water-shortage valves, which are each sealing, then the valve for adjusting the amplification factor need not be sealing. Rather, a slight leak can be accepted because the function of the valve, the adjustment of the fuel gas flow, but not its total prevention. As a result, can be dispensed with separate seals.

Gemäß den Merkmalen des Anspruchs 2 ergibt sich der Vorteil, dass die Steuerbewegung des Ventils rotationsförmig erfolgen kann; dies kommt der üblichen Drehbewegung zur Steuerung derartiger Ventile entgegen. Auf eine Umlenkung kann dabei verzichtet werden.According to the features of claim 2, there is the advantage that the control movement of the valve can be rotationally; this is contrary to the usual rotary motion for controlling such valves. On a diversion can be dispensed with.

Gemäß den Merkmalen des Anspruchs 3 ergibt sich der Vorteil, dass das Ventil feinfühlig dosiert werden kann. Besonders vorteilhaft ist es, wenn der Schlitz an einem Ende seines Translationsweges sehr schmal ist und seine Breite sich kontinuierlich verbreitert.According to the features of claim 3, there is the advantage that the valve can be dosed sensitively. It is particularly advantageous if the slot is very narrow at one end of its translation path and its width widens continuously.

Gemäß den Merkmalen des Anspruchs 4 ergibt sich der Vorteil, dass die Führung Bestandteil des Gehäuses, welches die Bauteile der Gasarmatur aufnimmt, ist, wodurch eine Bauteilreduzierung erreicht wird. Besonders vorteilhaft ist es, wenn die Öffnung Teil einer eingesetzten Buchse ist, da auf diese Art ein Austausch der Buchse (z.B. wegen Leistungsbegrenzung, Gasartenwechsel, u.a.) und eine höhere Fertigungsgenauigkeit (Gehäuse ist meist ein Druckgussteil, das nachbearbeitet wird) möglich ist.According to the features of claim 4, there is the advantage that the guide is part of the housing, which accommodates the components of the gas valve, whereby a component reduction is achieved. It is particularly advantageous if the opening is part of a bushing inserted, since in this way an exchange of the bushing (for example, because of power limitation, Gasartenwechsel, etc.) and higher manufacturing accuracy (housing is usually a die-cast part, which is reworked) is possible.

Gemäß den Merkmalen der Ansprüche 5 und 6 können gute Gleit- und Dichteigenschaften der beiden Ventilteile erreicht werden.According to the features of claims 5 and 6 good sliding and sealing properties of the two valve parts can be achieved.

Gemäß den Merkmalen des Anspruchs 7 ergibt sich der Vorteil, dass der Gasdruck gegen die Öffnungsrichtung des Wassermangelventils gerichtet ist. Hierdurch wird vermieden, dass z.B. bei Ausfall oder Reduzierung der Schließkraft des Ventils das Ventil durch den Gasdruck geöffnet wird.According to the features of claim 7 there is the advantage that the gas pressure is directed against the opening direction of the water shortage valve. This avoids that e.g. in case of failure or reduction of the closing force of the valve, the valve is opened by the gas pressure.

Gemäß den Merkmalen des Anspruchs 8 ergibt sich der Vorteil, dass eine translatorische Bewegung zur Erfüllung zweier Funktionen genutzt werden kann; aufwändige Umlenkungen werden überflüssig.According to the features of claim 8, there is the advantage that a translational movement can be used to fulfill two functions; elaborate deflections are superfluous.

Die Erfindung wird nun anhand der Zeichnungen erläutert. Hierbei zeigen

  • Fig. 1 und Fig. 2 zwei perspektivische Ansichten einer erfindungsgemäßen Gasarmatur,
  • Fig. 3 und Fig. 4 zwei Schnitte einer erfindungsgemäßen Gasarmatur im unbelasteten Zustand,
  • Fig. 5 bis Fig. 8 einen Teilschnitt in verschiedenen Betriebsstellungen,
  • Fig. 9 ein erfindungsgemäßes Wassermangelventil,
  • Fig. 10 eine Vorrichtung zur Brennerdruckeinstellung und
  • Fig. 11 bis Fig. 15 Einzelbauteile einer erfindungsgemäßen Gasarmatur.
The invention will now be explained with reference to the drawings. Show here
  • Fig. 1 and Fig. 2 two perspective views of a gas fitting according to the invention,
  • Fig. 3 and Fig. 4 two sections of a gas fitting according to the invention in the unloaded state,
  • Fig. 5 to Fig. 8 a partial section in different operating positions,
  • Fig. 9 an inventive water shortage valve,
  • Fig. 10 a device for burner pressure adjustment and
  • Fig. 11 to Fig. 15 Individual components of a gas fitting according to the invention.

Fig. 1 und Fig. 2 zeigen eine erfindungsgemäße Gasarmatur 20 mit einem Gehäuse 25, einem Einstellknopf 1, Brenngaseingang 17, Brenngasausgang 18 mit Schraube 29 zum Einstellen des Brennerdrucks, Zündgasausgang 19 und Wasserschalteranschluß 14. Der nicht dargestellte Wasserschalter ist durch eine Membrane in zwei Druckkammern getrennt. Beim Warmwasserzapfen wird von einer Venturidüse im Wasserschalter ein Differenzdruck zwischen den Kammern erzeugt; durch den Differenzdruck hebt sich die Membrane. Hierdurch wird ein zur Wassermenge stetig wachsendes Signal geliefert, das in Form einer Hubbewegung auf den Steuerstift 15 übertragen wird. Fig. 1 and Fig. 2 show a gas fitting 20 according to the invention with a housing 25, a knob 1, fuel gas inlet 17, fuel gas outlet 18 with screw 29 for adjusting the burner pressure, Zündgasausgang 19 and water switch port 14. The water switch, not shown, is separated by a membrane into two pressure chambers. When warm water tap a differential pressure between the chambers is generated by a Venturi nozzle in the water switch; the differential pressure raises the membrane. As a result, a steadily growing to the amount of water signal is delivered, which is transmitted in the form of a lifting movement to the control pin 15.

In Fig. 3 ist ein Schnitt durch diese Gasarmatur 20 im Ausgangszustand (d.h. kein Brenngasfluß) zu sehen. Der Brenngaseintritt 17 mündet in eine Kammer 24, in der sich ein Sicherheitsventil 5 und ein Thermomagnet 6, die miteinander gekoppelt sind, befinden.In Fig. 3 is a section through this gas fitting 20 in the initial state (ie no fuel gas flow) to see. The fuel gas inlet 17 opens into a chamber 24, in which a safety valve 5 and a thermomagnet 6, which are coupled together, are located.

Unterhalb des Sicherheitsventils 5 befindet sich eine weitere Kammer 23, in der sich in einer Führung 21 eine Hülse 8 mit einem Schlitz 9 befindet. In der Hülse 8 steckt zentrisch ein Zündgasbolzen 3, der in dem Einstellknopf 1 endet. Ein Teilbereich der Hülse 8 bildet mit einem Teilbereich des Zündgasbolzens 3 ein Zündgasventil 4, das die Verbindung zu einem Ringkanal 26 abdichtet. Zwischen Hülse 8 und Einstellknopf 1 ist eine Feder 7 gespannt. Der Zündgasbolzen 3 ist mit dem Einstellknopf 1 verbunden. Die Hülse 8 liegt an einer Buchse 11, die über eine Öffnung 13 verfügt, an. In der Buchse 11 befindet sich eine Feder 12, welche gegen ein Wassermangelventil 10 drückt. Vom Wassermangelventil 10 ragt ein Steuerstift 15 in den Wassermangelanschluß 14.Below the safety valve 5 is another chamber 23, in which a sleeve 8 is in a guide 21 with a slot 9. In the sleeve 8 inserted centrally a Zündgasbolzen 3, which ends in the knob 1. A portion of the sleeve 8 forms with a portion of the Zündgasbolzens 3 a Zündgasventil 4, which seals the connection to an annular channel 26. Between sleeve 8 and knob 1, a spring 7 is stretched. The Zündgasbolzen 3 is connected to the knob 1. The sleeve 8 is located on a bushing 11, which has an opening 13 at. In the socket 11 is a spring 12, which presses against a water shortage valve 10. From the water shortage valve 10, a control pin 15 projects into the water shortage 14th

Fig. 4 zeigt die Gasarmatur 20 in einem anderen Schnitt. Aus dieser Perspektive wird die Anbindung des Zündgasausgangs 19 sowie den Mechanismus zur Betätigung der Gasarmatur 20 deutlich. Für die translatorische Bewegung des Zündgasbolzens 3 ist eine Steuerkurve 2 (vgl. Fig. 13) im Einstellknopf 1 in Verbindung mit einer Schraube 16 vorhanden; die Funktion wird später beschrieben. Fig. 4 shows the gas valve 20 in another section. From this perspective, the connection of the Zündgasausgangs 19 and the mechanism for actuating the gas valve 20 is clear. For the translational movement of Zündgasbolzens 3 is a control cam 2 (see. Fig. 13 ) in the adjustment knob 1 in conjunction with a screw 16; the function will be described later.

Fig. 5 zeigt die gleiche Perspektive in einer anderen Arbeitsstellung, in der Zündstellung, bei der die Verbindung des Ringkanals 26 zum Zündgasausgang 19 über die Bohrung 27 deutlich wird. Fig. 5 shows the same perspective in a different working position, in the ignition position, in which the connection of the annular channel 26 to Zündgasausgang 19 through the bore 27 is clear.

Fig. 6 zeigt einen Teil der Gasarmatur 20 in einem weiteren Arbeitsschritt. Fig. 6 shows a part of the gas valve 20 in a further step.

In Fig. 7 ist ein Teil der Gasarmatur 20 in einem folgenden Arbeitsschritt zu sehen.In Fig. 7 is a part of the gas fitting 20 to see in a subsequent step.

Fig. 8 zeigt einen Teil der Gasarmatur 20 in den Betriebszustand, in dem Brenngas vom Brenngaseingang 17 zum Brenngasausgang 18 strömen kann. Fig. 8 shows a portion of the gas valve 20 in the operating condition in which fuel gas from the fuel gas inlet 17 to the fuel gas outlet 18 can flow.

Fig. 9 zeigt das geöffnete Wassermangelventil 10 im Detail. Fig. 9 shows the opened water shortage valve 10 in detail.

In Fig. 10 ist eine Vorrichtung zur Einstellung des Brennerdrucks zu sehen.In Fig. 10 is a device for adjusting the burner pressure to see.

Fig. 11 zeigt die Hülse 8 im Detail mit dem Schlitz 9 und Dichtringen 28. In Fig. 12 ist der Zündgasbolzen detailliert dargestellt. Aus Fig. 13 geht die Innenansicht des Einstellknopfes 1 mit der Steuerkurve hervor. Fig. 14 zeigt die Hülse 11 mit Öffnung 13 und Fig. 15 zeigt das Wassermangelventil 10 mit Steuerstift 15. Fig. 11 shows the sleeve 8 in detail with the slot 9 and sealing rings 28. In Fig. 12 the ignition gas bolt is shown in detail. Out Fig. 13 goes the interior of the knob 1 with the control cam out. Fig. 14 shows the sleeve 11 with opening 13 and Fig. 15 shows the water shortage valve 10 with control pin 15th

In Fig. 3 und Fig. 4 ist die Gasarmatur 20 im Ausgangszustand, in dem kein Brenngas strömt, zu sehen. Das Sicherheitsventil 5, das Zündgasventil 4 und das Wassermangelventil 10 sind geschlossen; die Öffnung 13 des Ventils zur Einstellung des Verstärkungsfaktors ist von der Hülse 8 verschlossen.In Fig. 3 and Fig. 4 is the gas fitting 20 in the initial state in which no fuel gas flows to see. The safety valve 5, the pilot gas valve 4 and the water shortage valve 10 are closed; the opening 13 of the valve for adjusting the amplification factor is closed by the sleeve 8.

Zur Inbetriebnahme wird der Einstellknopf 1 gemäß Fig. 5 in die Zündstellung gedreht. Während dieser Drehung verschiebt sich der Griff abhängig von der Position der Schraube 16 in der Steuerkurve 2 (vgl. Fig. 13) in Richtung Gehäuse. Der Einstellknopf 1 drückt den Zündgasbolzen 3 nach oben, wodurch das Dichtelement am Zündgasventil 4 aus der Bohrung heraustritt und das Ventil geöffnet wird. Eine Verbindung des Ringkanals 26 durch die Bohrung 27 zum Zündgasausgang 19 ist somit gegeben.To start up the knob 1 according to Fig. 5 turned to the ignition position. During this rotation, the handle shifts depending on the position of the screw 16 in the control cam 2 (see. Fig. 13 ) in the direction of the housing. The knob 1 presses the Zündgasbolzen 3 upwards, whereby the sealing element emerges from the bore at Zündgasventil 4 and the valve is opened. A compound of the annular channel 26 through the bore 27 to Zündgasausgang 19 is thus given.

Nun wird gemäß Fig. 6 der Einstellknopf 1 manuell weitergedrückt, wodurch die Spitze des Zündgasbolzens 3 den Ventilteller am Sicherheitsventil 5 öffnet. Die Druckbewegung endet sobald im Inneren des Thermomagneten 6 eine Ankerplatte am Eisenkern eines Elektomagneten anliegt. Brenngas kann nun vom Brenngaseingang 17 über die Kammer 24, durch das geöffnete Sicherheitsventil 5 in die Kammer 23, von dort über das geöffnete Zündgasventil 4 in den Ringkanal 26 und von dort über die Bohrung 27 in den Zündgasausgang 19, von dem eine Verbindung zu einem nicht dargestellten Zündbrenner besteht, strömen.Now according to Fig. 6 the knob 1 manually pushed further, causing the tip of Zündgasbolzens 3 opens the valve disc on the safety valve 5. The pressure movement ends as soon as inside the thermomagnet 6, an anchor plate rests against the iron core of a Elektomagneten. Fuel gas can now from the fuel gas inlet 17 via the chamber 24, through the open safety valve 5 in the chamber 23, from there via the open Zündgasventil 4 in the annular channel 26 and from there via the bore 27 in the Zündgasausgang 19, of which a connection to a pilot burner, not shown, flow.

Ein mechanisch erzeugter Zündfunken entzündet das Brenngas am Zündbrenner. Wenn die Zündflamme ein Thermoelement ausreichend erwärmt hat, wird durch den erzeugten Thermostrom die Ankerplatte am Eisenkern festgehalten.A mechanically generated spark ignites the fuel gas at the pilot burner. When the pilot has sufficiently heated a thermocouple, the generated thermo-current holds the anchor plate to the iron core.

Nach dem Loslassen des Einstellknopfes 1 wird - wie in Fig. 7 dargestellt - der Einstellknopf 1 zusammen mit dem Zündgasbolzen 3 von der Feder 7 wieder zurückgeschoben, wobei das Sicherheitsventil 5 bei Vorliegen einer Zündflamme und eines entsprechenden lonisationstromes durch den Thermomagneten 6 geöffnet bleibt. Durch Drehen des Einstellknopfes 1 wird die Gasarmatur 20 in die Bereitschaftsstellung gebracht. Während die axiale Lage dabei unverändert bleibt, kann die Hülse 8 gedreht werden und der variabel gestaltete Schlitz 9 überlagert die Öffnung 13 zum Wassermangelventil 10, welches nach wie vor geschlossen ist.After releasing the knob 1 is - as in Fig. 7 shown - the knob 1 together with the Zündgasbolzen 3 pushed back by the spring 7, wherein the safety valve 5 remains open in the presence of a pilot flame and a corresponding lonisationstromes by the thermomagnet 6. By turning the knob 1, the gas valve 20 is brought into the ready position. While the axial position remains unchanged, the sleeve 8 can be rotated and the variably shaped slot 9 superimposed on the opening 13 to the water shortage valve 10, which is still closed.

Die auf einer Seite an die Mantelfläche der Hülse 8 angepaßte Buchse 11 ist axial schwimmend eingesetzt und wird durch eine Feder 12 an die Hülse 8 angedrückt. Die Buchse 11 mit der Öffnung 13 in Verbindung mit der Stellung des Schlitzes 9 der Hülse 9 bestimmen die mögliche fließende Gasmenge (bei geöffnetem Wassermangelventil 10) bzw. die sogenannte Leistungsvorwahl.The adapted on one side to the lateral surface of the sleeve 8 bushing 11 is inserted axially floating and is pressed by a spring 12 to the sleeve 8. The bush 11 with the opening 13 in conjunction with the position of the slot 9 of the sleeve 9 determine the possible amount of flowing gas (with open water deficiency valve 10) or the so-called power preselection.

Gemäß Fig. 7 sperrt das Wassermangelventil 10 den Brenngasfluß über den Brenngasausgang 18 zum nicht dargestellten Brenner.According to Fig. 7 the water shortage valve 10 blocks the fuel gas flow via the fuel gas outlet 18 to the burner, not shown.

Über den Wasserschalteranschluß 14 kann ein Signal zum Öffnen des Wassermangelventils 10 auf den Steuerstift 15 gegeben werden. Der nicht dargestellte Wasserschalter überträgt einen vom Wasserdurchfluß abhängigen Hub an den Steuerstift 15, der schließlich den Wassermangelventilteller entgegen dem Gasfluss drückt und somit das Wassermangelventil 10 öffnet. Dies ist in Fig. 8 dargestellt. Das Brenngas kann nun von der Kammer 23 über den Schlitz 9 und die Öffnung 13 durch das geöffnete Wassermangelventil 10 in den Brenngasausgang 18 strömen. Der Öffnungsquerschnitt des Wassermangelventils 10 und somit der Brenngasvolumenstrom ist vom Hub des Steuerstiftes 15 abhängig. Fig. 9 zeigt die Gasarmatur, insbesondere das geöffnete Wassermangelventil 10 mit dem Brenngasausgang 18.Via the water switch connection 14, a signal for opening the water deficiency valve 10 can be given to the control pin 15. The water switch, not shown transmits a dependent of the water flow stroke to the control pin 15, which finally presses the water lack valve plate against the gas flow and thus the water shortage valve 10 opens. This is in Fig. 8 shown. The fuel gas can now flow from the chamber 23 via the slot 9 and the opening 13 through the open water deficiency valve 10 into the fuel gas outlet 18. The opening cross section of the water deficiency valve 10 and thus the fuel gas volume flow is dependent on the stroke of the control pin 15. Fig. 9 shows the gas valve, in particular the opened water shortage valve 10 with the fuel gas outlet 18th

Wie aus Fig. 10 ersichtlich, ist zur Anpassung an die örtlichen Drücke im Gasnetz die Möglichkeit zur Feineinstellung des Brennerdruckes mittels einer Schraube 29 gegeben.How out Fig. 10 can be seen, the possibility of fine adjustment of the burner pressure by means of a screw 29 is to adapt to the local pressures in the gas network.

Erst mit dem Zapfen von Wasser wird der Gasweg vom Brenngaseingang 17 über den Brenngasausgang 18 zum Brenner frei. Die Zündung des Brenners erfolgt durch Überspringen der Flamme von der brennenden Zündflamme. Wird der Wasserfluß beendet und der Wasserschalter überträgt dann keinen Hub, so wird der Ventilteller des Wassermangelventils von der Feder 12 wieder in den Ventilsitz zurückgedrückt und somit das Ventil geschlossen.Only with the pin of water, the gas path from the fuel gas inlet 17 via the fuel gas outlet 18 to the burner is released. Ignition of the burner is done by skipping the flame from the burning pilot flame. If the water flow is terminated and the water switch then transmits no stroke, the valve plate of the water deficiency valve is pushed back by the spring 12 back into the valve seat, thus closing the valve.

Durch die koaxiale Anordnung von Zündgasventil 4 und Sicherheitsventil 5 entfallen im Vergleich zum Stand der Technik Umlenkungen. Die Funktionsintegration vereinfacht den Aufbau und reduziert Kosten.Due to the coaxial arrangement of Zündgasventil 4 and 5 safety valve eliminates in comparison to the prior art deflections. Function integration simplifies setup and reduces costs.

Die Feder 12 erfüllt zwei Funktionen. Zum einen stellt sie ein Anliegen der Buchse 11 an der Hülse 8 sicher; zum anderen schließt sie das Wassermangelventil 10. Ein Ausbau der Buchse 11 z.B. für eine Gasartenwechsel ist nach der Demontage des Wassermangelventils 10 möglich.The spring 12 fulfills two functions. First, it ensures a concern of the socket 11 on the sleeve 8 sure; on the other hand, it closes the water shortage valve 10. An expansion of the socket 11, for example, for a gas type change is possible after disassembly of the water deficiency valve 10.

Weitere Vorteile sind:Further advantages are:

Das Zündgasventil 4 ist ohne die sonst übliche Flachdichtung und ohne gedrehten Ventilsitz ausgeführt, so dass die Anzahl der Teile verringert und die Montage vereinfacht ist.The Zündgasventil 4 is performed without the usual flat gasket and without a rotated valve seat, so that the number of parts reduced and the assembly is simplified.

Das Wassermangelventil 4 schließt in Brenngasströmungsrichtung. Durch die deshalb kleinere Schließfederkraft 12 kann die Membrane am Wasserschalter verkleinert werden.The water shortage valve 4 closes in the fuel gas flow direction. Due to the therefore smaller closing spring force 12, the membrane can be reduced in size at the water switch.

Durch Verwendung von Drehteilen für die Ventilsitze am Sicherheitsventil 5 und Wassermangelventil 10 kann die mechanische Bearbeitung des Gehäuses vereinfacht und auf ein Mindestmaß reduziert werden. Es gibt bei der gezeigten Ausführungsform nur vier Bearbeitungs- bzw. Montagerichtungen.By using turned parts for the valve seats on the safety valve 5 and water shortage valve 10, the mechanical processing of the housing can be simplified and reduced to a minimum. There are only four processing or assembly directions in the embodiment shown.

Falls ein Heizgerät mit einer erfindungsgemäßen Gasarmatur auf eine andere Gasart umgestellt werden soll, muß nur die Wasserschalterseite geöffnet werden.If a heater is to be switched with a gas fitting according to the invention to another type of gas, only the water switch side must be opened.

Claims (8)

  1. A hydraulically controlled gas fitting (20) for a gas fired instantaneous water heater, such fitting (20) having a valve for setting the amplification factor governing the ratio between the fuel gas flow rate and the water flow rate, characterised in that the valve for setting such amplification factor is formed by a sleeve (8) with a slot (9) and a guide sleeve (21) with an opening (13), with the sleeve (8) being guided in the guide sleeve (21) in such a way that the slot (9) is continuously guidable via the opening (13).
  2. A hydraulically controlled gas fitting (20) as claimed in Claim 1 characterised in that the sleeve (8) and the guide sleeve (21) are of rotationally symmetrical configuration and have the same axis of rotation (22).
  3. A hydraulically controlled gas fitting (20) as claimed in Claim 1 or Claim 2 characterised in that the slot (9) does not have a constant width in the translational direction.
  4. A hydraulically controlled gas fitting (20) as claimed in any of the Claims 1 to 3 characterised in that the guide sleeve (21) forms part of a housing (25), preferably with an inserted bushing (11) provided with the opening (13).
  5. A hydraulically controlled gas fitting (20) as claimed in any of the Claims 1 to 4 characterised in that the sleeve (8) is made of a plastics material, preferably polyamide.
  6. A hydraulically controlled gas fitting (20) as claimed in any of the Claims 1 to 5 characterised in that the guide sleeve (21), or the housing (25), respectively, is made of metal, preferably brass, zinc or aluminium.
  7. A hydraulically controlled gas fitting (20) as claimed in any of the Claims 1 to 6 characterised in that the gas fitting (20) is provided with a low water valve (10) controlling the volume of fuel gas in relation to the volume of water, and that the opening direction of the low water valve (10) directed against the flow direction of the fuel gas.
  8. A hydraulically controlled gas fitting (20) as claimed in any of the Claims 1 to 7 characterised in that the gas fitting (20) is provided with an ignition gas valve (23) and a safety valve (5) whose translational axis (22) is identical.
EP03007464A 2002-04-11 2003-04-04 Hydraulically controlled gas fitting Expired - Lifetime EP1353126B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT03007464T ATE439553T1 (en) 2002-04-11 2003-04-04 HYDRAULICALLY CONTROLLED GAS FACTORY

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10217030 2002-04-11
DE10217030 2002-04-11
AT18392002 2002-12-10
AT0183902A AT412232B (en) 2002-12-10 2002-12-10 Gas fitting for a gas heated water heater, comprises a valve composed of a sleeve with a slot and a guide with an opening

Publications (3)

Publication Number Publication Date
EP1353126A2 EP1353126A2 (en) 2003-10-15
EP1353126A3 EP1353126A3 (en) 2004-06-23
EP1353126B1 true EP1353126B1 (en) 2009-08-12

Family

ID=28455342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03007464A Expired - Lifetime EP1353126B1 (en) 2002-04-11 2003-04-04 Hydraulically controlled gas fitting

Country Status (6)

Country Link
EP (1) EP1353126B1 (en)
AT (1) ATE439553T1 (en)
DE (2) DE10315543A1 (en)
DK (1) DK1353126T3 (en)
ES (1) ES2329022T3 (en)
PT (1) PT1353126E (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL1528320T3 (en) * 2003-10-31 2011-07-29 Vaillant Gmbh Gas valve

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525327A1 (en) * 1982-04-20 1983-10-21 Sdecc Membrane for controlling gas valve - opens or shuts valve helped by hydraulic actuator and pressure differential
EP0252252A3 (en) * 1986-05-15 1988-09-21 Joh. Vaillant GmbH u. Co. Domestic hot water heater

Also Published As

Publication number Publication date
DE50311791D1 (en) 2009-09-24
PT1353126E (en) 2009-09-28
ATE439553T1 (en) 2009-08-15
DE10315543A1 (en) 2003-10-30
ES2329022T3 (en) 2009-11-20
EP1353126A2 (en) 2003-10-15
EP1353126A3 (en) 2004-06-23
DK1353126T3 (en) 2009-12-14

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