EP3171085A1 - Appareil de chauffage doté d'un brûleur assisté d'un ventilateur - Google Patents

Appareil de chauffage doté d'un brûleur assisté d'un ventilateur Download PDF

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Publication number
EP3171085A1
EP3171085A1 EP16188709.6A EP16188709A EP3171085A1 EP 3171085 A1 EP3171085 A1 EP 3171085A1 EP 16188709 A EP16188709 A EP 16188709A EP 3171085 A1 EP3171085 A1 EP 3171085A1
Authority
EP
European Patent Office
Prior art keywords
fuel
switching
switching device
adjusting element
heating device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16188709.6A
Other languages
German (de)
English (en)
Inventor
Rainer Rausch
Sadik Cecen
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3171085A1 publication Critical patent/EP3171085A1/fr
Withdrawn legal-status Critical Current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
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/002—Gaseous fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/0027—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2900/00—Special features of, or arrangements for fuel supplies
    • F23K2900/05002—Valves for gaseous fuel supply lines
    • 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

Definitions

  • the invention relates to a heater with a fan supported by a burner according to the preamble of claim 1, and a fuel-air mixing device according to the preamble of claim 14.
  • Vormischbrenner are used in the rule.
  • a fan draws in a quantity of combustion air.
  • a fuel control valve then releases an amount of fuel corresponding to the amount of air (so-called fuel-air composite control).
  • Fuel and air are mixed together in a fuel-air mixer and then sent to combustion.
  • Natural gas is a naturally occurring fuel of varying qualities depending on the deposit. A distinction is made between H-natural gas with high energy content and L-natural gas with low energy content. To meet an assumed same heat requirement, a smaller amount of H natural gas would have to be burned than L natural gas.
  • a replaceable throttle insert is provided at the fuel outlet of the fuel control valve.
  • Throttle inserts for H natural gas have a smaller cross section than throttle inserts for L natural gas.
  • the throttle insert of the fuel control valve must be replaced. This assembly step requires great care and attention of a heating installer and can also be quite tricky and time-consuming because of the increasingly compact heaters. Inadvertently, a wrong throttle insert or even no throttle insert can be installed. As a result of such errors, a burner can be thermally overloaded or flames can not be stably formed on a burner surface and a heater operation can be disturbed. A heat requirement of connected heat consumers can no longer be reliably fulfilled.
  • the heater according to the invention with a burner supported by a fan and a fuel-air mixing device which supplies in particular gaseous fuel via a fuel line flowing air, is characterized in that in the fuel line a through-flow of the fuel switching device for switching between at least two switching positions is arranged, each switching position is associated with a passage opening for the fuel.
  • the blower is generally used to promote the combustion air, but may also promote the fuel-air mixture or the exhaust gas, and is arranged in accordance with the airway or in the mixture or in the exhaust path.
  • the fuel-air mixing device opens an air inlet for the entry of combustion air and a fuel line for the entry of fuel.
  • the purpose of the fuel-air mixing device is to combine and mix the combustion air and the fuel. The mixture is fed to the burner.
  • the fuel-air mixture continuously exits during a burning period, is ignited by means of a spark or pilot flame and burned.
  • the resulting during combustion hot exhaust gas is used to provide useful heat, for example, it heats in a heat exchanger flowing heating water and / or drinking water.
  • the cooled exhaust gas in the heat exchanger flows through an exhaust pipe to the chimney.
  • the switching device is arranged in the fuel line fuel upstream of the fuel-air mixing device.
  • the fuel flows through the switching device. According to their at least two switching positions, the switching device has at least two passage openings for the fuel. Depending on the switching position, the fuel either flows through a first passage opening or through a further passage opening.
  • a throttle insert change as in the prior art is no longer necessary because the previously required throttle inserts are replaced by the passage openings in the switching device. Instead of a throttle insert change, the switching device now switches over from one switching position to another switching position. This then also takes place a changeover from one passage opening to another passage opening. Swapping, losing or forgetting throttle inserts is thus excluded. Switching between the switching positions of the switching device can be done manually. But it is also conceivable, for example, an electrical, pneumatic or hydraulic switching mechanism.
  • An advantageous embodiment of the invention has a arranged in the fuel line fuel control valve for regulating a fuel pressure to a predetermined value, wherein the switching device is arranged downstream of the fuel fuel supply valve.
  • the fuel control valve releases a fuel quantity corresponding to a delivered air quantity and / or an applied air pressure or mixture pressure.
  • the fuel control valve regulates the pressure of the released fuel to the same value.
  • the switching device arranged between the fuel control valve and the fuel-air mixing device throttles the pressure according to the size of its passage opening and thus adapts the released fuel quantity to the fuel quality selected with the switching position of the switching device.
  • the switching device is integrally formed with the fuel control valve.
  • fuel control valve and switching device in one piece or as a component built, for example, directly connected or arranged in a common component housing. This results in a particularly compact or in a heater manufacturing simple and quick to assemble functional unit, for example, has fewer joints to be sealed.
  • An advantageous embodiment of the invention is characterized in that the passage openings of the switching device differ from each other in terms of their geometry. This ensures that is selected by switching depending on the switching position, a passage opening with other acting on the fuel pressure throttle influences.
  • These differences in geometry may exist in particular with regard to their passage opening diameter and / or their passage opening contour (longitudinal section contour, cross-sectional contour).
  • the switching device comprises a base member and an actuating element, wherein the base member of the recording of the actuating element is used, and wherein the actuating element is designed as a rotatable between at least two switching positions actuator.
  • the base member is for connecting the switching device to the fuel control valve and / or the fuel line and / or the fuel-air mixing device. This connection is made at a fuel inlet and / or a fuel outlet of the base member and is fuel-tight against leaks to the outside, but fuel-conducting towards the inside in a fuel flow direction.
  • the base member has a receiving opening for the actuator for its storage. In this case, the actuating element is rotatably arranged in the base element.
  • the switching positions of the switching device acting on the fuel arise in the interior of the switching device from the selectable switching positions of the actuating element, which is rotatable relative to the base element.
  • the switching device further comprises an actuating element for selecting and switching the switching positions. This may, for example, be a rotary knob.
  • the switching device comprises a base member and an actuating element, wherein the base member is used to receive the actuating element, and wherein the actuating element as a is formed between at least two switch positions displaceable actuator.
  • the base member is for connecting the switching device to the fuel control valve and / or the fuel line and / or the fuel-air mixing device. This connection is made at a fuel inlet and / or a fuel outlet of the base member and is fuel-tight against leaks to the outside, but fuel-conducting towards the inside in a fuel flow direction.
  • the base member has a receiving opening for the actuator for its storage. In this case, the adjusting element is arranged displaceably in the base element.
  • the switching positions of the switching device acting on the fuel arise in the interior of the switching device from the selectable switching positions of the actuating element, which is displaceable relative to the base element.
  • the switching device further comprises an actuating element for selecting and switching the switching positions. This may, for example, be a push and pull button.
  • An advantageous embodiment of the invention is characterized in that the switching positions of the switching device discretely distinguishable switching positions.
  • the switching device can be adjusted in fixed increments or at fixed intervals, this has a clear and unambiguous selection and determination of an acting on the fuel passage opening result.
  • the switching positions could also be infinitely selectable and adjustable, so that any intermediate switching positions arise.
  • the actuating element has at least two through openings, which are assigned or assignable to a fuel inlet and a fuel outlet of the base element depending on the switching position, so that each switching position is exactly one continuous open flow channel for a fuel flow through the switching device.
  • At least one passage opening may at least partially have the same size (for example, the same diameter) as the fuel inlet and / or the fuel outlet of the base element. Then arises because of the constant contour in a longitudinal section through the switching device (cut in the direction of a fuel flow) a pressure loss-free or at least low pressure loss flow path through the switching device a.
  • a further embodiment of the invention is characterized in that the continuously open flow channel is a rectilinear flow channel, that is, that the center line of the flow channel is a straight line and the flow channel has no deflections. This results in a particularly low-pressure flow control through the switching device.
  • a throttle section in the form of a passage constriction is at least partially formed in at least one passage opening of the actuating element.
  • This passage constriction may, for example, have rounded or beveled inlet contours and / or outlet contours.
  • the passage constriction in the control element can be formed with respect to a fuel inlet or fuel outlet in the base element by means of a reduced passage cross-section.
  • the switching device comprises at least one sealing element, wherein the sealing element causes a leakage-free flow through the switching device, wherein at least one sealing element between the base element and the adjusting element is arranged.
  • a sealing element may be, for example, an O-ring or a flat gasket.
  • the switching device comprises a latching element, wherein the latching element releasably locks and fixes the actuating element in its at least two switching positions relative to the base element.
  • This locking element is a precise selection and adjustment of the selected switching position achievable, since there is a tactile locking when setting a switch position.
  • the latching element may be, for example, a spring element that moves with the adjusting element and engages in a latching position on the base element or einfedert.
  • a spring element can also be firmly connected to the base element and engage in a locking position on the adjusting element. To release the spring element, for example, manually disengage or push out, then the actuator can be adjusted.
  • the switching device comprises a securing element, wherein the securing element secures the actuating element against slipping out of the base element.
  • the actuator can be adjusted securely in the base element, without taking the risk of falling out. Falling or slipping out of the control element from the base element would have an undesirable fuel leakage in a Aufstellumlibrary the heater or an undesirable air inlet into the fuel line result.
  • the securing element can be designed as a separate component-for example as a securing ring or lock washer-or in one piece with the adjusting element or the basic element.
  • the fuel-air mixing device with an air inlet and a fuel line, the gaseous fuel, in particular, for use in a heater according to the invention, the flowing air (20), characterized in that in the fuel line through which a flow through the fuel switching device for switching between at least two switching positions is arranged, each switching position is associated with a passage opening for the fuel.
  • FIG. 1 schematically shows a heater 10 according to the invention with a supported by a blower 11 burner 12 and a fuel-air mixing device 13, the air flowing through a fuel line 14 L in particular gaseous fuel B supplies.
  • the blower 11 arranged here in the fuel / air mixture path 15 draws air L into the fuel / air mixing device 13.
  • fuel B is introduced into the fuel / air mixing device 13 and mixed with the air L.
  • the thereby forming fuel-air mixture M is supplied to the burner 12, ignited and burned to form a stationary stable flame, hot exhaust A arise.
  • each switching position is associated with a passage opening 42 for the fuel B.
  • a fuel control valve 16 for controlling a fuel pressure
  • an exhaust-water heat exchanger 17 for transmitting the heat of the hot exhaust gases A to water W
  • an exhaust pipe 18 and an exhaust port 19 for discharging the cooled exhaust gases A in one here illustrated chimney
  • a flow line 20 and a return line 21 for the in the exhaust-water heat exchanger 17 is heated water W
  • a control device 22 for controlling heater functions.
  • a throttle insert on the fuel control valve 16 is replaced.
  • at least the fuel line 14 has to be dismantled at the fuel control valve 16, taken out an existing throttle insert, inserted a suitable for a used fuel quality new throttle insert and the fuel line 14 are mounted again on the fuel control valve 16.
  • the switching device 30 may also be connected directly and without an intermediate piece of the fuel line 14 to the fuel control valve 16 and / or to the fuel-air mixing device 13.
  • FIG. 2a shows a switching device 30 in parts with a base member 31 and a rotatable about an axis A1 actuator 32 in a perspective view.
  • FIG. 2b shows the same switching device 30 in a sectional view.
  • primitive 31 and actuator 32 show the FIGS. 2a and 2 B a locking element 33 arranged on the base element, two sealing elements 34 (here O-rings) arranged on the adjusting element, and a securing element 35 to be arranged on the adjusting element, which secures an adjusting element 32 mounted in the base element 31 against unintentional falling out.
  • the base member 31 has a fuel inlet 36 and a fuel outlet 37 and a fuel inlet 36 and fuel outlet 37 connecting through bore 38.
  • Fuel inlet 36 and fuel outlet 37 are configured for connection to fuel line 14 (or a conduit interface of fuel line 14) and / or fuel control fitting 16 and / or fuel-air mixing device 13 and for receiving sealant means (not shown) , Transverse, in particular perpendicular, to the through-bore 38, the receiving opening 39 is provided for receiving the adjusting element 32.
  • the receiving opening 39 divides the through-bore 38 into a first through-bore section 40 assigned to the fuel inlet 36 and into a second through-hole section 41 assigned to the fuel outlet 37.
  • the actuator 32 is formed as a rotatable actuator 32-D, which fits into the receiving opening 39 of the base member 31, where it is rotatably mounted. Depending on the selected switching position connects a first passage opening 42-1 or a further passage opening 42-2 of the actuating element 32, the two through-bore portions 40, 41 of the base member 31 to a fluid-conducting Connection by the switching device 30.
  • the actuator 32 includes a first portion 32-1 and a second portion 32-2.
  • the first portion 32-1 of the adjusting element 32 is received in the assembled state of the switching device 30 in the receiving opening 39 of the base member 31, in FIG. 2a
  • the first portion 32-1 is substantially cylindrical, but generally may be rotatable in a cylindrical and / or conical receiving opening 39 of the base member 31.
  • the first section 32-1 has (at least) two passage openings 42 for the fuel B, in the present example, both passage openings 42-1, 42-2 extend transversely through the axis of rotation A1 of the first section 32-1, wherein they intersect.
  • This is a particularly compact design of the switching device 30, but arise at the intersection of the openings 42-1, 42-2 demolition edges, which represent an increased flow resistance for a fuel flow, comparisons FIGS.
  • the passage openings 42 can also run eccentrically along secants through the first section 32-1 of the adjusting element 32, wherein they do not intersect, compare FIG. 3b (View from above).
  • the selected depending on the switching position passage opening 42-1, 42-2 in the actuator 32 connects the two Through-bore portions 40, 41 in the base member 31 fluid-conducting for a fuel flow from the fuel inlet 36 to the fuel outlet 37.
  • the at least one further, selected passage opening 42-2, 42-1 has no fluid-conducting connection to the fuel inlet 36 and the fuel outlet 37.
  • FIG. 2b shows in section an actuating element 32 with two passage openings 42, wherein at least one passage opening 42 has a throttle portion 43 in the form of a passage constriction.
  • the passage constriction defined by their size, for example by means of their diameter, the free flow cross-section, which is available for a fuel flow and causes a given pressure fuel flow a pressure loss.
  • the second section 32-2 of the actuating element 32 comes to lie in the assembled state of the switching device 30 outside of the base member 31 (outside the receiving opening 39 for the actuating element 32). It serves to introduce a movement for adjusting the adjusting element 32, for example, a manual rotation.
  • the second section 32-2 may have markings "L", "H” for identifying the selected switching position and the passage opening 42 selected therewith, as well as latching points 44 for latching a latching element 33 arranged on the base element.
  • the latching element 33 can also be located on the second section 32-2 for latching in latching points 44 on the base element 31st
  • Both the switching device 30 after FIG. 3a as well as the after FIG. 3b have consistently open, rectilinear flow channels (formed by the two through-hole sections 40, 41 and the selected passage opening 42-1), that is, that the center lines of the flow channels are straight lines and the flow channels have no deflections. This results in a low pressure loss flow.
  • FIG. 4 shows in section the mounted switching device 30 after FIGS. 2a and 2b on average.
  • FIG. 5a shows a switching device 30 in individual parts with a base member 31 and a displaceable along an axis A2 actuator 32-S in a perspective view.
  • FIG. 5b shows the same switching device 30 in a sectional view.
  • the switchover device 30 has a latching element (not shown) arranged on the base element 31, at least one sealing element (for example a flat gasket, not shown) arranged on the control element 32 or base element 31, and at least one securing element 35 to be arranged on the control element 32. the one mounted in the base member 31 actuator 32 secures against accidental falling out.
  • the base member 31 has a fuel inlet 36 and a fuel outlet 37 and a fuel inlet 36 and fuel outlet 37 connecting through bore 38.
  • Fuel inlet 36 and fuel outlet 37 are for a connection to the fuel line 14 (or a line adapter of the fuel line 14) and / or the fuel control valve 16 and / or the fuel-air mixing device 13 and for receiving suitable in this regard sealing means.
  • Transverse, in particular perpendicular, to the through-bore 38 the receiving opening 39 is provided for receiving the adjusting element 32.
  • the receiving opening 39 divides the through-bore 38 into a through-bore section 40 assigned to the fuel inlet 36 and into a through-bore section 41 assigned to the fuel outlet 37.
  • the actuator 32 is formed as a sliding actuator 32-S, which fits into the receiving opening 39 of the base member 31, where it is slidably mounted. Depending on the selected switching position connects a first 42-1 or another passage opening 42-2 of the adjusting element 32, the two through-bore portions 40, 41 of the base member 31 to a fluid-conducting connection by the switching device 30th
  • the actuator 32 is received in the assembled state of the switching device 30 in the receiving opening 39 of the base member 31.
  • the actuator 32 and the corresponding dividendöffung 39 are in FIGS. 5a and 5b elongated cuboid, but may be generally prismatic, so that the actuator 32 has only one degree of freedom of movement (translation along the prism longitudinal axis).
  • the adjusting element 32 has (at least) two passage openings 42-1, 42-2 for the fuel B, which are arranged parallel to one another and extend transversely through the prismatic, in particular parallelepiped, actuating element 32-S.
  • the selected depending on the switching position passage opening 42 in the actuator 32 connects the two through-bore portions 40, 41 in the base member 31 fluidly conductive for a fuel flow from the fuel inlet 36 to the fuel outlet 37.
  • the at least one other, selected passage opening 42 has no fluid-conducting connection to the fuel inlet 36 and the fuel outlet 37 ,
  • the actuator 32 comes in the assembled state of the switching device 30 partially within the base member 31 (within the receiving opening 39 for the actuator 32) and partially outside of the base member 31 (outside the receiving opening 39) lie, wherein a lying in a first switching position within the receiving opening 39 part of the actuating element 32 is located in a second switching position outside the receiving opening 39.
  • a lying in a first switching position within the receiving opening 39 part of the actuating element 32 is located in a second switching position outside the receiving opening 39.
  • the fluid-conducting passage opening 42 serves to connect the fuel inlet 36 and fuel outlet 37.
  • a movement for adjusting the control element 32 for example a manual movement.
  • the actuator 32 may have markings for identifying the selected switching position and the passage opening 42 selected therewith and latching points 44 for latching a latching element 33 arranged on the base element 31.
  • the latching element 33 can also be located on the adjusting element 32 for latching in latching points 44 on the base element 31st
  • FIG. 5c shows the mounted switching device 30 after FIGS. 5a and 5b ,
  • FIG. 6 shows a top view of a switching device 30 in section.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Multiple-Way Valves (AREA)
EP16188709.6A 2015-11-20 2016-09-14 Appareil de chauffage doté d'un brûleur assisté d'un ventilateur Withdrawn EP3171085A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015222950.5A DE102015222950A1 (de) 2015-11-20 2015-11-20 Heizgerät mit einem von einem Gebläse unterstützten Brenner

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EP3171085A1 true EP3171085A1 (fr) 2017-05-24

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EP16188709.6A Withdrawn EP3171085A1 (fr) 2015-11-20 2016-09-14 Appareil de chauffage doté d'un brûleur assisté d'un ventilateur

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EP (1) EP3171085A1 (fr)
DE (1) DE102015222950A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110143294A1 (en) * 2009-12-14 2011-06-16 David Deng Dual fuel heating source with nozzle
WO2013143830A1 (fr) * 2012-03-27 2013-10-03 Coprecitec, S.L. Vanne de régulation pour une cuisinière à gaz, et cuisinière à gaz comprenant ladite vanne de régulation
EP2863125A1 (fr) * 2013-10-16 2015-04-22 Robert Bosch Gmbh Appareil de chauffage doté d'un brûleur assisté d'un ventilateur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2239507C3 (de) * 1972-08-11 1978-07-20 Sredneasiazkij Nautschno-Issledovatelskij Institut Prirodnogo Gasa, Sredasniigas, Taschkent (Sowjetunion) Gasbrenner
DE4000446A1 (de) * 1990-01-09 1991-07-11 Siemens Ag Armatur zur verbindung mindestens eines hybridbrenners mit einrichtungen zur zustellung eines fluidischen brennstoffes
DE102013113814A1 (de) * 2013-12-11 2015-06-11 Endegs Gmbh Brenneranordnung und Verfahren zum Betrieb derselben

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110143294A1 (en) * 2009-12-14 2011-06-16 David Deng Dual fuel heating source with nozzle
WO2013143830A1 (fr) * 2012-03-27 2013-10-03 Coprecitec, S.L. Vanne de régulation pour une cuisinière à gaz, et cuisinière à gaz comprenant ladite vanne de régulation
EP2863125A1 (fr) * 2013-10-16 2015-04-22 Robert Bosch Gmbh Appareil de chauffage doté d'un brûleur assisté d'un ventilateur

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