EP0424358B1 - Heating apparatus with a flow quantity control device for the flow of combustion air - Google Patents

Heating apparatus with a flow quantity control device for the flow of combustion air Download PDF

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Publication number
EP0424358B1
EP0424358B1 EP90890286A EP90890286A EP0424358B1 EP 0424358 B1 EP0424358 B1 EP 0424358B1 EP 90890286 A EP90890286 A EP 90890286A EP 90890286 A EP90890286 A EP 90890286A EP 0424358 B1 EP0424358 B1 EP 0424358B1
Authority
EP
European Patent Office
Prior art keywords
duct
combustion air
valve
burner
heating appliance
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.)
Expired - Lifetime
Application number
EP90890286A
Other languages
German (de)
French (fr)
Other versions
EP0424358A2 (en
EP0424358A3 (en
Inventor
Peter Goebel
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.)
N.V. VAILLANT S.A.
Vaillant Austria GmbH
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Original Assignee
Vaillant Austria GmbH
Nv Vaillant Sa
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Vaillant BV
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 Austria GmbH, Nv Vaillant Sa, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd, Vaillant BV filed Critical Vaillant Austria GmbH
Publication of EP0424358A2 publication Critical patent/EP0424358A2/en
Publication of EP0424358A3 publication Critical patent/EP0424358A3/en
Application granted granted Critical
Publication of EP0424358B1 publication Critical patent/EP0424358B1/en
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
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/008—Flow control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/02—Air or combustion gas valves or dampers
    • F23N2235/06—Air or combustion gas valves or dampers at the air intake

Definitions

  • the invention relates to a heater with a device according to the introductory part of the independent claim.
  • Such a heating device has become known from US Pat. No. 4,262,608, which has an exhaust gas fan and a fresh air fan, both of which are driven by a common motor. A concentric guidance of the exhaust and supply air pipe serves to preheat the combustion air. There is an air flow-controlled flap in each of the supply air duct and the flue gas duct so that both ways can be closed when the fans are stopped.
  • the invention has for its object to provide a cheaper space-saving design for the heater, in which a control of the throughput of combustion air is possible.
  • the heat exchanger 3 of a device for example a water heater, which is heated by a forced draft burner 1 and is arranged above a combustion chamber 2, is located within a technically sealed housing 21, the ceiling of which is designated by 4.
  • This housing cover 4 is penetrated within a sleeve 5 by an exhaust gas duct 7 adjoining the exhaust hood 6 of the heat exchanger 3, which exhaust gas duct 7 is held in a sealing manner in the exhaust pipe 8 of the exhaust hood 6 by means of a seal 9.
  • This seal 9 seals the exhaust duct 7 also against the wall of a duct carrying the combustion air 10, which runs in the upper part of the device housing below the ceiling 4 and is fed via the sleeve 5 with combustion air from the installation room of the device or an external wall connection.
  • the combustion air from this duct 10 is fed to the forced draft burner 1 by means of a blower, not shown, via the mixture distribution chamber 11 and the connection 12.
  • the combustion air (room air or fresh air) emerges from the duct 10 via the recess 13 in the wall of this duct 10, which can be closed in phases by means of a conical valve body 14 coaxial with this recess 13.
  • the combustion air entering the device housing via this recess 13 reaches the mixture distribution chamber 11 via the fan, but is previously cleaned in the dust filter 15 which has been eroded between the sleeve 5 and the recess 13.
  • a differential pressure monitor 16 is arranged in the area of the channel 10, which monitors the compliance with the pressure conditions required for the correct operation of the device.
  • a direct current magnet 18 is used according to FIG.
  • the respective end position or the operating state can be recognized and controlled by any monitoring element, for example by a microswitch.
  • a differential pressure switch 16 (FIG. 1) can only excite the DC coil 18 when the blower reaches a certain negative pressure, but this always depends on the operating state of the device.
  • the conical valve body 14 is pressed by its closing spring 17 onto the valve seat 13 formed by the recess 13, closed or (continuously) throttles the combustion air throughput Burner 1 and thereby acts as a circulation lock or throttle.
  • the direct current magnet 18 is excited and pulls the valve body 14 against the action of the closing spring 17 against the stop 20 that can be adjusted from the outside.
  • This adjustability enables the device to be subsequently adjusted at the installation location.
  • the closing spring 17 and / or the direct current magnet 18 By selecting the closing spring 17 and / or the direct current magnet 18, a different dimensioning of the combustion air throughput for heating or domestic water operation is also possible.

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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)
  • Air Supply (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Abstract

For controlling the flow quantity of combustion air to a burner (1) with fan, of a heating device, for example a water heater, which burner is fed with a fuel/air mixture, there is provided in the combustion-air guide (10) a valve (13, 14) which is automatic in stoppages, for example closing under the influence of a return spring (17) and only opening in the event of heat requirement. The valve body (14) of this valve (13, 14) can, inside a duct (10) serving for combustion air guidance and arranged above the combustion chamber (2), the heat exchanger (3) and the waste gas hood (6) of the burner (1) with fan, lie coaxially opposite a recess (13) which is provided in the wall of this duct (10) and serves as valve seat and via which the combustion air flows to the burner (1) with fan. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Heizgerät mit einer Vorrichtung gemäß dem einleitenden Teil des unabhängigen Patentanspruchs.The invention relates to a heater with a device according to the introductory part of the independent claim.

Aus der US-PS 4 262 608 ist ein solches Heizgerät bekanntgeworden, das einen Abgas- und einen Frischluftventilator aufweist, die beide von einem gemeinsamen Motor angetrieben sind. Eine konzentrische Führung des Abgas- und Zuluftrohres dient der Vorheizung der Verbrennungsluft. In der Zuluftführung und der Abgasleitung ist je eine luftstromgesteuerte Klappe vorhanden, um beide Wege abschließen zu können, wenn die Ventilatoren stillgesetzt sind.Such a heating device has become known from US Pat. No. 4,262,608, which has an exhaust gas fan and a fresh air fan, both of which are driven by a common motor. A concentric guidance of the exhaust and supply air pipe serves to preheat the combustion air. There is an air flow-controlled flap in each of the supply air duct and the flue gas duct so that both ways can be closed when the fans are stopped.

Gegenüber diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine günstigere raumsparendere Konstruktion für das Heizgerät zu schaffen, bei der eine Steuerung des Durchsatzes an Verbrennungsluft möglich ist.Compared to this prior art, the invention has for its object to provide a cheaper space-saving design for the heater, in which a control of the throughput of combustion air is possible.

Die Lösung der Aufgabe ist bei einer beim Heizgerät der eingangs näher bezeichneten Art möglich durch die im kennzeichnenden Teil des unabhängigen Patentanspruchs aufgenommenen Merkmale.The problem is solved in a heater of the type specified in the introduction by the features included in the characterizing part of the independent claim.

Hieraus resultiert der technische Fortschritt einer raumsparenden Konstruktion in Verbindung mit einer aktiven Steuerung des Durchsatzstromes an Verbrennungsluft.This results in the technical progress of a space-saving construction in connection with an active control of the flow rate of combustion air.

Durch die GB-PS 886 349 ist es bekannt, die Zufuhr von Verbrennungsluft zu einem Brenner während seines Betriebs aktiv zu steuern. Dies geschieht dort allerdings durch eine Verbindung eines Ventilkörpers mit dem Motor als Gebläse.From GB-PS 886 349 it is known to actively control the supply of combustion air to a burner during its operation. However, this is done there by connecting a valve body to the motor as a fan.

Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche, und ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen veranschaulicht und wird anschließend anhand dieser Zeichnungen erläutert.Further embodiments of the invention are the subject of the subclaims, and an exemplary embodiment of the invention is illustrated in the drawings and is subsequently explained on the basis of these drawings.

Im einzelnen zeigen:

  • Figur 1 das Gerät mit der Vorrichtung in einem schematischen Vertikalschnitt,
  • Figur 2 a einen Schnitt durch das zugehörige Ventil in Betriebsstellung und
  • Figur 2 b einen Schnitt durch das zugehörige Ventil in Ruhestellung.
In detail show:
  • FIG. 1 shows the device with the device in a schematic vertical section,
  • Figure 2 a shows a section through the associated valve in the operating position and
  • Figure 2 b shows a section through the associated valve in the rest position.

Der mit einem Gebläsebrenner 1 beheizte, oberhalb eines Brennraumes 2 angeordnete Wärmetauscher 3 eines Gerätes, zum Beispiel eines Wasserheizers, befindet sich innerhalb eines technisch dichten Gehäuses 21, dessen Decke mit 4 bezeichnet ist.The heat exchanger 3 of a device, for example a water heater, which is heated by a forced draft burner 1 and is arranged above a combustion chamber 2, is located within a technically sealed housing 21, the ceiling of which is designated by 4.

Diese Gehäusedecke 4 wird innerhalb einer Manschette 5 von einer an die Abgashaube 6 des Wärmetauschers 3 anschließenden Abgasführung 7 durchsetzt, die im Abgasstutzen 8 der Abgashaube 6 mittels einer Dichtung 9 dichtend gehalten wird.This housing cover 4 is penetrated within a sleeve 5 by an exhaust gas duct 7 adjoining the exhaust hood 6 of the heat exchanger 3, which exhaust gas duct 7 is held in a sealing manner in the exhaust pipe 8 of the exhaust hood 6 by means of a seal 9.

Diese Dichtung 9 dichtet die Abgasführung 7 auch gegen die Wandung eines die Verbrennungsluft führenden Kanales 10 ab, der im oberen Teil des Gerätegehäuses unterhalb dessen Decke 4 verläuft und über die Manschette 5 mit Verbrennungsluft aus dem Aufstellungsraum des Gerätes oder einem Außenmaueranschluß gespeist wird. Dem Gebläsebrenner 1 wird die Verbrennungsluft aus diesem Kanal 10 mittels eines nicht dargestellten Gebläses über die Gemischverteilerkammer 11 und den Anschluß 12 zugeführt. Der Austritt der Verbrennungsluft (Raumluft oder Frischluft) aus dem Kanal 10 erfolgt über die Ausnehmung 13 der Wandung dieses Kanales 10, die mittels eines zu dieser Ausnehmung 13 koaxialen kegelförmigen Ventilkörpers 14 phasenweise verschließbar ist. Die über diese Ausnehmung 13 in das Gerätegehäuse eintretende Verbrennungsluft gelangt über das Gebläse in die Gemischverteilerkammer 11, wird jedoch vorher in dem zwischen der Manschette 5 und der Ausnehmung 13 angerodneten Staubfilter 15 gereinigt.This seal 9 seals the exhaust duct 7 also against the wall of a duct carrying the combustion air 10, which runs in the upper part of the device housing below the ceiling 4 and is fed via the sleeve 5 with combustion air from the installation room of the device or an external wall connection. The combustion air from this duct 10 is fed to the forced draft burner 1 by means of a blower, not shown, via the mixture distribution chamber 11 and the connection 12. The combustion air (room air or fresh air) emerges from the duct 10 via the recess 13 in the wall of this duct 10, which can be closed in phases by means of a conical valve body 14 coaxial with this recess 13. The combustion air entering the device housing via this recess 13 reaches the mixture distribution chamber 11 via the fan, but is previously cleaned in the dust filter 15 which has been eroded between the sleeve 5 and the recess 13.

Ferner ist im Bereich des Kanals 10 ein Differenzdruckwächter 16 angeordnet, der die Einhaltung der für den einwandfreien Betrieb des Gerätes erforderlichen Druckverhältnisse überwacht.Furthermore, a differential pressure monitor 16 is arranged in the area of the channel 10, which monitors the compliance with the pressure conditions required for the correct operation of the device.

Zur Steuerung des in bezug zur Ausnehmung 13 axial beweglich gelagerten Ventilkörpers 14 dient gemäß Figur 2 ein Gleichstrommagnet 18, der gegen die Wirkung der den Ventilkörper 14 beeinflussenden Verschließfeder 17 erregbar und mittels einer Halterung 19 an der Gehäusedecke 4 befestigt ist.To control the valve body 14, which is mounted so as to be axially movable with respect to the recess 13, a direct current magnet 18 is used according to FIG.

Die jeweilige Endlage beziehungsweise der Betriebszustand kann durch ein beliebiges Überwachungselement erkannt und gesteuert werden, zum Beispiel durch einen Mikroschalter. Ebenso kann ein Differenzdruckwächter 16 (Figur 1) erst bei Erreichen eines bestimmten Unterdrucks durch das Gebläse die Gleichstromspule 18 erregen, dies aber stets in Abhängigkeit vom Betriebszustand des Gerätes.The respective end position or the operating state can be recognized and controlled by any monitoring element, for example by a microswitch. Likewise, a differential pressure switch 16 (FIG. 1) can only excite the DC coil 18 when the blower reaches a certain negative pressure, but this always depends on the operating state of the device.

Die Funktion der Vorrichtung ergibt sich aus deren oben geschildertem Aufbau wie folgt:The function of the device results from the structure described above as follows:

In Betriebspausen wird der kegelförmige Ventilkörper 14 von seiner Verschließfeder 17 auf den von der Ausnehmung 13 gebildeten Ventilsitz 13 gedrückt, verschließt oder (stufenlos) drosselt den Verbrennungsluftdurchsatz zum Brenner 1 und wirkt dadurch als Zirkulationssperre beziehungsweise -drossel.During breaks in operation, the conical valve body 14 is pressed by its closing spring 17 onto the valve seat 13 formed by the recess 13, closed or (continuously) throttles the combustion air throughput Burner 1 and thereby acts as a circulation lock or throttle.

Bei allgemeiner Wärmeanforderung, sei es einer Heizungswasser- oder Brauchwasseranforderung, wird der Gleichstrommagnet 18 erregt und zieht den Ventilkörper 14 gegen die Wirkung der Verschließfeder 17 gegen den von außen einstellbaren Anschlag 20.In the event of a general heat request, be it a heating water or service water request, the direct current magnet 18 is excited and pulls the valve body 14 against the action of the closing spring 17 against the stop 20 that can be adjusted from the outside.

Diese Einstellbarkeit ermöglicht eine nachträgliche Justierung der Vorrichtung am Einbauort. Durch Auswahl der Verschließfeder 17 und/oder des Gleichstrommagneten 18 ist auch eine unterschiedliche Bemessung des Verbrennungsluftdurchsatzes für Heizungs- oder Brauchwasserbetrieb möglich.This adjustability enables the device to be subsequently adjusted at the installation location. By selecting the closing spring 17 and / or the direct current magnet 18, a different dimensioning of the combustion air throughput for heating or domestic water operation is also possible.

Claims (5)

  1. A heating appliance comprising an apparatus for colltrolling the flow rate of the combustion air in a duct (10) for supplying the combustion air to a fan-assisted burner (1), which is supplied with a fuel-air mixture, wherein the duct (10) is disposed in a housing (21), which is tight for technical purposes and extends above the combustion chamber (2) of the heating appliance and an exhaust gas hood (6) of the fan-assisting burner, and the apparatus comprises a valve, which is disposed in the duct (10) and comprises a valve member (14) and a valve seat (13) and is controlled by a differential air pressure to automatically close when the appliance is turned off and to open only in response to a heat demand, characterized in that
    (i) a heat exchanger (3) is provided between the combustion chamber (2) and the duct (10),
    (ii) the housing (21) which is tight for technical purposes encloses the heating appliance and comprises a top wall (4) above the duct (10),
    (iii) the valve comprises a closing spring (17), which biases the valve member (14) to the valve seat, and the valve seat is constituted by an aperture (13), which is formed in the duct (10) and coaxially faces the valve member (14) and the valve-closing spring (17), and
    (iv) the aperture (13) constitutes a part of a differential pressure detector (16), which controls a solenoid (18) for actuating the valve member (14).
  2. A heating appliance according to claim 1, characterized in that the exhaust gas duct (7) associated with the fan-assisted burner (1) extends transversely through said duct (10).
  3. A heating appliance accordint to claim 2, characterized by a collar (5), which is spaced around the exhaust gas duct (7) and constitutes the inlet for the combustion air.
  4. A heating appliance according to any of claims 1 to 3, characterized in that the duct (10) contains a dust filter (15) between the inlet for the combustion air and the aperture (13), which constitutes an outlet for the combustion air flowing to the burner (1).
  5. A heating appliance according to claim 4, characterized in that the collar (5), which constitutes the inlet for the combustion air and surrounds the exhaust gas duct (7), and the holder (19) for the valve (13, 14) for controlling the flow rate of the combustion air, are secured to said top wall (4).
EP90890286A 1989-10-20 1990-10-22 Heating apparatus with a flow quantity control device for the flow of combustion air Expired - Lifetime EP0424358B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0241089A AT393890B (en) 1989-10-20 1989-10-20 DEVICE FOR CONTROLLING THE FLOW OF COMBUSTION AIR TO A FAN BURNER
AT2410/89 1989-10-20

Publications (3)

Publication Number Publication Date
EP0424358A2 EP0424358A2 (en) 1991-04-24
EP0424358A3 EP0424358A3 (en) 1991-06-05
EP0424358B1 true EP0424358B1 (en) 1994-06-01

Family

ID=3533848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90890286A Expired - Lifetime EP0424358B1 (en) 1989-10-20 1990-10-22 Heating apparatus with a flow quantity control device for the flow of combustion air

Country Status (3)

Country Link
EP (1) EP0424358B1 (en)
AT (2) AT393890B (en)
DE (2) DE9014470U1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397851B (en) * 1989-11-24 1994-07-25 Vaillant Gmbh HEATER
US6223697B1 (en) * 1998-08-21 2001-05-01 Srp 687 Pty Ltd. Water heater with heat sensitive air inlet
AT407434B (en) * 1998-11-30 2001-03-26 Vaillant Gmbh HEAT EXCHANGER GASKET
JP2003329244A (en) * 2002-05-14 2003-11-19 Mitsubishi Heavy Ind Ltd Gas turbine combustor and combustion controlling method
EP3073195B1 (en) 2015-03-23 2019-05-08 Honeywell Technologies Sarl Method for calibrating a gas burner

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB886349A (en) * 1958-11-14 1962-01-03 Denis Wharmby Myers Improvements in oil burner draught control devices
US4262608A (en) * 1979-06-14 1981-04-21 Jackson Bert W Method and apparatus for powered flue products exhaust and preheated combustion air supply
EP0024376A1 (en) * 1979-08-17 1981-03-04 Archibald Watson Kidd Heating apparatus
NL8600247A (en) * 1986-01-31 1987-08-17 Atag Bv Apparatenfab HEATING DEVICE.
EP0303559A3 (en) * 1987-08-13 1990-06-20 Joh. Vaillant GmbH u. Co. Circulation of combustion air to the burner of a burner appliance, for instance of a water heater

Also Published As

Publication number Publication date
DE59005920D1 (en) 1994-07-07
EP0424358A2 (en) 1991-04-24
ATA241089A (en) 1991-06-15
AT393890B (en) 1991-12-27
ATE106527T1 (en) 1994-06-15
EP0424358A3 (en) 1991-06-05
DE9014470U1 (en) 1990-12-20

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