EP1275901A2 - Verdampferbrenner - Google Patents
Verdampferbrenner Download PDFInfo
- Publication number
- EP1275901A2 EP1275901A2 EP02014269A EP02014269A EP1275901A2 EP 1275901 A2 EP1275901 A2 EP 1275901A2 EP 02014269 A EP02014269 A EP 02014269A EP 02014269 A EP02014269 A EP 02014269A EP 1275901 A2 EP1275901 A2 EP 1275901A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- evaporator
- heating
- fuel
- evaporation
- combustion chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/06—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs structurally associated with fluid-fuel burners
- F23Q7/08—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs structurally associated with fluid-fuel burners for evaporating and igniting liquid fuel, e.g. in hurricane lanterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01B—BOILING; BOILING APPARATUS ; EVAPORATION; EVAPORATION APPARATUS
- B01B1/00—Boiling; Boiling apparatus for physical or chemical purposes ; Evaporation in general
- B01B1/005—Evaporation for physical or chemical purposes; Evaporation apparatus therefor, e.g. evaporation of liquids for gas phase reactions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D3/00—Burners using capillary action
- F23D3/40—Burners using capillary action the capillary action taking place in one or more rigid porous bodies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2207/00—Ignition devices associated with burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/00002—Cleaning burner parts, e.g. burner tips
Definitions
- the present invention relates to an evaporator burner, such as, for example applies to heaters in motor vehicles application.
- WO 98/49494 discloses an evaporator burner in which Floor area of a combustion chamber, a porous evaporator medium, for example Nonwoven material is arranged.
- a porous evaporator medium for example Nonwoven material is arranged.
- liquid fuel is passed to it by capillary action in the porous evaporator medium to distribute.
- the fuel evaporates, leaving in the area of Combustion chamber by accumulation of fuel vapor and combustion air an ignitable or combustible mixture is formed.
- Glühzündux includes. By heating the Glühzünduxs becomes in whose environment generates such a high temperature that in this Area existing ignitable mixture ignites and then in the Area of the combustion chamber which spreads combustion.
- an evaporator burner which in turn in the bottom region of a combustion chamber provided porous medium for distribution and evaporation of fuel is.
- a heating coil heating device provided, which in the region of the porous medium when energized the temperatures required to ignite in the range of about 1,100 ° C can lie, can generate.
- an evaporator burner is to solve this problem provided, comprising an evaporator medium for Feeding fuel vapor into a combustion chamber, a first heater, comprising at least one for igniting in the combustion chamber existing fuel vapor at least with its heating area in the combustion chamber protruding Zündheizelement, and a second heating device, comprising at least one of the evaporator medium for influencing Evaporation heater associated with its vaporization characteristic.
- the present invention overcomes those of the prior art Disadvantage in that they are used for ignition on the one hand and for Evaporation of the liquid supplied fuel on the other hand, each separate Provides heaters. These may vary in terms of These temperatures to be generated and the required heating capacities each optimally adapted to the requirements placed on these become.
- preheating the fuel to be evaporated the evaporation rate is increased while still avoiding for this purpose, heat energy is withdrawn from the flame which is spreading out becomes.
- the flame propagation in the starting phase of such Evaporator burner runs much faster, so that ultimately too the full load operation is achieved much faster than with the out of the Prior art known evaporator burners.
- the at least one evaporative heating element the only for Preheating of the fuel to be evaporated is used, not the prevailing in the combustion chamber comparatively high temperatures suspend, it can be provided that the at least one evaporation heating element on a side facing away from the combustion chamber side the evaporator medium is arranged. This can be done, for example be obtained that the evaporator medium on an evaporator medium carrier is provided and that the at least one evaporation heating element between the evaporator medium and the evaporator medium carrier is arranged.
- the evaporator burner according to the invention further a fuel supply passage arrangement for introducing liquid fuel provided in the evaporator medium.
- the fuel supply channel arrangement for Distribution of the liquid fuel across the evaporator medium is trained. This can be achieved, for example, by the fact that the Brennstoffzu Georgiakanalanowski extract least one annular channel region and / or at least one of a fuel supply line substantially radially outgoing radial channel area in the evaporator medium and / or an evaporator medium carrier.
- the inventive evaporator burner preferably a Air supply duct arrangement for supplying with the fuel vapor to be burned air in the combustion chamber.
- the air supply duct arrangement in a combustion chamber delimiting wall at least one towards the combustion chamber having open air inlet opening.
- the Luftzu 1500kanalan extract At least one Having the evaporator medium open air inlet opening.
- the Luftzu 1500kanalan extract at least a Heilzu Georgiakanal Scheme passing through the evaporator medium having.
- the heat dissipation occurring in the area of an evaporator burner can, according to a further advantageous aspect of the present Invention in that the at least one evaporation heating element and the evaporator medium on a ceramic material formed Evaporator medium carriers are provided for improved thermal Isolation and thus a further acceleration of the flame propagation be taken care of.
- the evaporator medium may comprise porous material for obtaining the fastest possible dissemination of the liquid fuel in the evaporator medium itself and then for the evaporation of the distributed liquid fuel may preferably be formed multi-layered.
- fleece material can be used.
- a general problem that occurs in the operation of evaporator burners is the required high variability of the burner output.
- such evaporator burners with a variety of different fuels or with fuels different quality can be operated.
- conventional diesel fuel for example in addition to the applicability of conventional diesel fuel of course the usability of winter diesel or Arctic diesel required.
- evaporation is not always under optimal conditions, such as e.g. optimal evaporation temperature and optimum oxygen supply, takes place.
- an evaporator burner preferably a cleaning assembly for removal from depositing in the combustion chamber in the combustion mode Deposits.
- the cleaning arrangement a heating arrangement through which in the region of A combustion chamber in the range or above a combustion temperature of the Deposits lying temperature can be generated.
- the present invention provides that the heating arrangement for generating the temperature in the range or above the burnup temperature is formed at least in the region of the evaporator medium.
- this heater also the forms to be used for cleaning heating assembly. Depending if, then a normal evaporation operation or a burn-off operation for cleaning is provided, this heater can then with different Heating power to be operated accordingly different, for the different operating phases to produce suitable temperatures.
- the present invention relates to a purification process for cleaning a heating burner, in particular one Evaporator burner, as has been described above, at Which method by activating a heating arrangement to deposits a wall surrounding a combustion chamber to a temperature in Area of or above the burning temperature of the deposits heated and be burned down.
- the cleaning process is then performed when the heating burner is not in a heating mode is. Since in the normal heating mode by the interaction various system components ensure that Fuel and oxygen in a suitable ratio for combustion can be entered, this measure according to the invention can ensure that does not take place during a heating operating state phase Burning off oxygen, which in itself for normal combustion of the injected or vaporized fuel would be required, for Burning of the deposits is used and thus for combustion is no longer available. An impairment of normal operation can thus be avoided.
- the Cleaning process subsequent to a heating operating state phase of Heating burner is performed.
- the advantage of this measure is that in the Connection to a normal heating operating state the various System components are already heated so that the to burn off the Impurities or deposits required heating power accordingly can be reduced.
- the heating arrangement driven with a duty cycle of less than one become.
- the advantage of this measure is that you get through the clocked Driving the heater in a simple manner, the heating power can regulate, without depending on the available supply voltage to be or to be essentially limited by this.
- this a drive device by which the heating power at least the second heating device is adjustable, wherein a monitoring module the heating power and / or the required heating power of the second Heating device monitored and based on the monitoring result detects the presence of a fuel vapor.
- the present invention takes advantage of the fact that in the evaporation of fuel due to the need for evaporation and the energy extracted from the environment in the transition from a state in which there is no evaporation, to a state in which Evaporation is present to maintain the same temperature performance the evaporation supporting heater must be increased. Otherwise, a cooling of the area would occur in the the evaporation takes place.
- This change in the driving characteristic or required driving characteristic for this heater uses the present invention to recognize when the transition to the vaporization state occurs.
- the Evaporation heater an electrically operated heating element with at increasing temperature increasing electrical resistance includes.
- the present invention further relates to a method for monitoring the fuel supply to an evaporator burner, this method in particular in an evaporator burner according to the invention for use can come.
- This evaporator burner includes one for assistance the fuel evaporation provided heater.
- Method is based on the heating power of the heater and / or a change in the heating power of the heater and / or a required Changing the heating power of the heater determines whether in one Combustion chamber of the evaporator burner, a fuel evaporation available is.
- an evaporator burner is disabled, which, for example by deactivating a combustion assist heater and adjusting the fuel supply, it is advantageous to ensure that in the evaporator burner remaining fuel residues be completely ejected. This may preferably be achieved be done that activates a evaporation supporting heater is evaporated and the remaining fuel evaporates. Due to the already described above physical effect that for the production the fuel evaporation energy is required, which by corresponding excitation of the associated heating device provided may be further provided according to the present invention that then, if the heating power or the required heating power of the evaporation supporting heater decreases, it is recognized that no more fuel is available for evaporation anymore.
- FIGS. 1-5 A first embodiment of an evaporator burner 10 according to the invention is shown in FIGS. 1-5.
- the evaporator burner 10 comprises an air duct housing 12, which is shown only partially, as well as a burner housing 16 which defines it and essentially a longitudinal central axis L of the evaporator burner 10, as indicated schematically by arrows P 1 in FIG supplied in an air supply area 18 of the air guide housing 12 combustion air.
- the combustion exhaust gases via a discharge region 20 of the air guide housing 12, as indicated by an arrow P 2 , discharged from the area of the evaporator burner 10.
- the supply of combustion air or the discharge of the resulting exhaust gases during combustion can be carried out in a conventional manner.
- a flame tube 22 extending along the longitudinal central axis L of the evaporator burner 10 is provided.
- the flame tube 22 similar to the burner housing 16 in its axially open region, on the air guide housing 12, namely a front housing plate 24 thereof, set.
- the flame tube 22 is axially open, so that, as indicated by the arrow P 3 , the exhaust gases resulting during combustion flow into an annular space region 28 formed between the flame tube 22 and the burner housing 16 can.
- the housing plate 24 has in its lower region a slot-like, approximately over an angular range of 180 ° curved extending outlet opening 30.
- the flame tube 22 is positioned on the housing plate 24 such that this outlet opening 30 is located outside of the space enclosed by the flame tube 22 space and thus establishes a connection between the annular space 28 and the discharge area 20 of the air guide housing 12.
- a pot-like molded evaporator medium carrier 32 is attached in the area enclosed by the flame tube 22 space area is at the same side as the flame tube 22 on the housing plate 24 .
- evaporator medium carrier 32 enclosed space area is the common one arranged with 34 designated evaporator medium, in the illustrated Example comprises two layers 36, 38 of nonwoven material.
- the nonwoven material situation 36 for example, formed with finer pore structure than the nonwoven material layer 38.
- At the substantially cylindrical wall area 40 of the evaporator medium carrier 32 includes a ring-shaped, for example, from sheet metal constructed Brennschttingsteil 42 on. This has removed in its from the evaporator medium carrier 32 lying end portion a ring-like Flammblende 44 with central passage opening.
- a plurality of slot-like and curved air inlet openings 46 are provided on the housing plate 24.
- the air inlet openings 46 are - in relation to the longitudinal center axis L - in a radial region between the flame tube 22 and the evaporator medium carrier 32.
- the combustion air can enter via these air inlet openings 46 in an annular space 48, which is formed between the flame tube 22 and the evaporator medium carrier 32 and the adjoining the evaporator medium carrier 32 region of the Brennschdungsteils 42.
- This annular space 48 is closed axially by the widening contour of the combustion chamber wall part 42, which then rests against the inner circumference of the flame tube 22.
- the combustion chamber wall part 42 In its approximately cylindrically formed region adjoining the evaporator medium carrier 32, the combustion chamber wall part 42 has a plurality of air passage openings 50, which follow each other in the circumferential direction and, for example, are axially offset. The air which has reached the annular space 48 via the air inlet openings 46 can thus flow through these air passage openings 50 into the combustion chamber 52 enclosed by the combustion chamber wall part 42 into a region which lies close to the surface of the evaporator medium 34.
- a central, i. the longitudinal central axis L near area has the Bottom region 54 of the evaporator medium carrier 32 has an opening, in which opens a fuel supply line 56.
- the fuel supply line 56 ends before the evaporator medium 34, i. the floor area 54 near nonwoven material layer 36.
- the via the fuel line 56 supplied fuel thus occurs in this central area in the nonwoven material layer 36.
- a disc-like design deflector 58 may be provided, which is the immediate axial entry of the fuel from the nonwoven material layer 36 into the nonwoven material layer 38 in the longitudinal center axis L near area prevented.
- the bottom portion 54 of the evaporator medium carrier 32 and the two Nonwoven material layers 36, 38 openings 62, 64, 66, 68 are provided. These passes through a Glühzünd21 70 so that he can provide with his the ignition temperatures provided end portion into the combustion chamber 52nd protrudes.
- evaporator burner 10 thus has two from each other separately trained and also independently operable Heaters on.
- a first of these includes the Glühzündit 70, while the second heater, the evaporation heater 72nd includes.
- the evaporator burner 10 in particular in the start state be operated in such a way that by energizing the evaporation heating 72 of the evaporator medium carrier 32 and thus also the be heated on this supported evaporator medium 34.
- the Heat required for this purpose is essentially the evaporation heating element 72 supplied, and there also by increased evaporation of Fuel distributed over the entire area of the combustion chamber 52 a very good ignitable mixture is a very fast flame spread occur over the entire area of the combustion chamber.
- FIGS. 1 - 3 illustrated evaporator medium carrier 32 thermally well insulating material, e.g. Ceramic material to provide. Since, as can be seen in particular in Figs. 2 and 3, the at the Rear side of the bottom portion 54 provided evaporation heating 72 in a region 88 of reduced wall thickness of the floor area 54 is still in this area a comparatively good heat transfer to the evaporator medium 34 obtained.
- the Brennschdungsteil 42 from To provide ceramic material or this possibly also integral with form the evaporator medium carrier 32.
- combustion chamber wall part 42 for example, as investment casting or sheet metal part be constructed.
- the evaporation heating element on the evaporator medium 32 on the side to provide which also supports the nonwoven material layer 36, i. the evaporator medium 34, carries. It becomes a very good thermal one in this way Contact generated.
- FIGS. 1-3 A modification of the embodiment shown in FIGS. 1-3, in particular in the region of the evaporator medium carrier 32, in FIGS. 4 and 5 shown. It can be seen here that in the wall region 40 of the pot-shaped evaporator medium carrier 32 in the circumferential direction distributed more air passage openings 74 are provided. These are thus in an axial region which is covered by the evaporator medium 34 is.
- the air passage openings 74 open into their radially inner Areas in the evaporator medium 34 a.
- the over the air passage openings 74 flows from the annular space 48 supplied combustion air So first the evaporator medium 34, is there together with in the Evaporating medium 34 heats accumulated fuel and then enters from the evaporator medium 34 together with the evaporating fuel into the combustion chamber 52. It will thus make the generation easy ignitable mixture of vaporized fuel and combustion air promoted, so that according to an advantageous variant, the air passage openings 74 preferably serve for supplying ignition air. The then in normal combustion state is used or required air continue mainly by the above-mentioned air passage openings 50 supplied.
- FIG. 6-10 An alternative embodiment of an evaporator burner according to the invention is shown in Figs. 6-10.
- the basic structure of the evaporator burner 10 with regard to the provision of the air guide region 12 and the evaporator housing 16 corresponds to the structure described above.
- a clear difference, however, is that now to the flame tube 22 concentrically a radially inner air supply pipe 80 is provided.
- the evaporator medium carrier 32 is , as seen especially in Fig. 6 and 10, formed like a ring segment.
- the two nonwoven material layers 36, 38 of the evaporator medium 34 are also ring-shaped and have the openings 66, 68 in the interruption region of the evaporator medium carrier 32.
- the evaporator medium carrier 32 with the nonwoven material layers 36, 38 carried thereon is arranged surrounding the air supply tube 80 in the bottom region of the combustion chamber 52, so that the nonwoven material layer 38 is again exposed to the combustion chamber 52.
- the evaporator medium carrier 32 In the surface in contact with the nonwoven material layer 36 has the evaporator medium carrier 32 axially toward the nonwoven material layer 36 open groove-like annular channel 86. In this opens the fuel line 56, so that the supplied via the fuel line 56 fuel through the channel 86 in the circumferential direction over the entire ring-like trained nonwoven material layers 36, 38 can be distributed.
- the Evaporator medium carrier 32 again a recess 88, in which the for example, again formed by a heating coil or such Heating coil comprehensive evaporation heating element 72 positioned is.
- Glühzünd21 70 On the housing plate 24 is in a trained use area 90 of the Glühzünd21 70 carried such that it with his for generating high temperature area provided the interrupted area of the Evaporator medium carrier 32 and the openings 66, 68 in the nonwoven material layers 36, 38 interspersed, in one with respect to the longitudinal center line L in the example shown skewed configuration.
- the free one End region of Glühzünduxs 70 is thus positioned near the area in which when energizing the evaporation heating element 72 a comparatively large amount of fuel by evaporation in the combustion chamber 52 arrives.
- FIG. 11 An alternative type of fuel supply in this Ausliensart an evaporator burner is shown in Fig. 11.
- the fuel via the fuel line 56 is not in the axial direction in the Channel 86 is fed, but approximately in a circumferential center region This channel 86 is introduced from radially outside. Due to the introduction into the circumferential center region of this channel 86 can achieve an even better distribution of the supplied fuel become.
- Fig. 11 in a circumferential direction uninterrupted annular evaporator medium carrier 32 is provided is.
- passage opening for this in the evaporator medium carrier 32 for the suitable positioning of Glühzündits 70th be taken care of.
- FIG. 12 Another alternative variant of the fuel supply is shown in FIG. 12. It can be seen here that the fuel line 56 is in the groove-like open channel 86 extends into or extends along it. The fuel line 56 points in the region lying in the channel 86 Openings 94, through which the fuel can then escape and in the nonwoven material layer 36 can enter.
- the in the variants according to the Fig. 6 - 12 shown approximately annular distribution of the fuel is particularly advantageous in pulse-like fuel supply.
- suitable selection of the dimension of the openings 94 and the mutual Distance of the same here can influence the distribution characteristic be taken. For example, it is possible in Circumferential direction distributes the openings 94 with changing dimension or to provide varying mutual distance.
- spacer ribs 96 are provided which the contact surface between the evaporator medium carrier 32 and the housing plate 24 to minimize the Reduce heat transfer.
- the ring-like formed evaporator medium carrier 32 preferably made of ceramic material or other poorly thermally conductive material formed.
- FIGS. 13 to 15 Another embodiment of an assembly, which the two heaters or the evaporator medium comprises, is in Figs. 13 to 15 is shown.
- the structure corresponds approximately to the previous With reference to FIGS. 1-5 described construction with central Fuel supply.
- an approximately disk-like trained evaporator medium carrier 32 in the central region of the Fuel line 56 opens.
- the evaporator medium carrier 32 At the nonwoven material layer 36 bearing Side, the evaporator medium carrier 32, the star-shaped radially outside emanating from the junction of the fuel line 56 groove-like channels 60. About this is at the back of the nonwoven material layer 36 increases the supplied fuel over the surface of the Nonwoven material layer 36 distributed.
- the embodiment variant shown in FIGS. 13-15 can be a form preassembled module, so can pre-assembled the evaporator medium carrier 32, the multi-layered porous evaporator medium, for example 34 and the two heaters, so the Glühzünd21 70 and the evaporation heating element 72 include.
- This assembly can then in a particularly simple manner in the other Integrated manufacturing process of an evaporator burner according to the invention become.
- a second heater provides by heating the medium, that both for the distribution and for the evaporation of the fuel contributes, that a high rate of evaporation independent of the flame formation of the fuel is present, for a faster Firing favors and on the other hand an improved flame propagation over the entire combustion chamber result.
- an evaporator burner has been described in which by providing the evaporation heating element 72, in particular on Start of an operating phase for increased fuel evaporation and thus faster provision of a good ignitable and combustible Mixture of fuel vapor and air can be taken care of.
- a problem in such evaporator burners is that these generally for A variety of fuels should be used and beyond should have comparatively large Brenner orientalssprektrum. Here can be a ratio of maximum to minimum burner power at about 4: 1 lie.
- the present invention is characterized by appropriate design of the Verdampfungsheizelements ensured that the deposits forming in the combustion mode, which are themselves flammable, removed at certain times become.
- the procedure is such that for the evaporation heating a heating element is provided which generate temperatures can lead to the burning off of the deposits. These are temperatures of at least 600 ° C.
- Is by appropriate energization of the Evaporation heater 72 generates such a high temperature the coke-like deposits were ignited and burned. To this, too can support the blower with which in normal combustion mode the combustion air provided in the combustion chamber 52nd also be put into operation. It can be this way and the oxygen required to burn off the deposits be provided in sufficient quantity.
- heating elements have so-called Mantelloomleiter proven. These include a ceramic powder embedded Resistance wire. The ceramic powder and this resistance wire are pressed into a heat-resistant steel tube.
- the essential Advantage of this arrangement is that it is electrically non-conductive and thus even when producing so-called coke bridges no risk of short circuit consists. Furthermore, it is very heat resistant and due to their good deformability optimally adaptable to other components.
- Heating the evaporation heating element 72 to such high temperatures that also in the area of the combustion chamber 52, in particular in the area the evaporator medium 34 deposits are burned off For example, by monitoring the total operating time of the Evaporator burner 10 are made at certain times. It This can be done more or less periodically in this way be that the entire evaporator burner back to a state is brought, in which this one correct combustion operation can perform. Since during the normal combustion operation of the Provided oxygen for burning the evaporated fuel is needed and thus for burning deposits in the Substantially no oxygen is available according to the present invention Invention preferably proceeded such that the burning the deposits are made at a time in which the evaporator burner 10 is not in an operating condition in which evaporates Fuel is burned. This is preferably done here, that after such an operating phase, the burning off the deposits is carried out. The advantage is that in this Condition different components of the evaporator burner 10 relative are warm. It is thus necessary to carry out the burning electrical power slightly lowered.
- the evaporation heating element 72 either for a normal evaporation operation or to burn off deposits to use this, this is preferably in a clocked manner and driven with a different duty cycle of one. Depending on whether lower temperatures achieved in the evaporation operation should be obtained or higher temperatures in the burn-off should, the duty cycle can be adjusted accordingly. To this Way is further ensured that the operation of the evaporation heating element 72 substantially independent of the supply voltage becomes. Just the setting of the heating intervals allows easy Setting the heating power.
- Another advantage of performing a cleaning process in this Operating phase is that generally after switching off an auxiliary heater or an auxiliary heater of the internal combustion engine of a vehicle and the cooling water supplied to this are at operating temperature and thus also by stopping the auxiliary heater, the load on the supply voltage is reduced. Also in this phase of operation are generally the Seat heating, the rear and windscreen heating is no longer in operation be.
- evaporator burners of the type described above is generally the dosing pump, through which the fuel into the combustion chamber 52 introduced or conveyed to the evaporator medium 34, in terms supervised by their company.
- the coil current the metering pump are evaluated and it may possibly from it be closed, whether the metering pump is working properly or not. Should however, in the area between dosing pump and combustion chamber, for example a liquid leak may be present, this can only be conditionally recognize the current waveform of a dosing pump coil. Especially would a very precise evaluation of this current waveform a very require complex electronics.
- According to the present invention therefore provided with the inclusion of the evaporation heating element To obtain information about whether fuel in the combustion chamber 52nd is initiated or not. This will be described below.
- the present invention makes Benefits of a particular temperature-resistance relationship provided in the bottom region of the combustion chamber 52 Evaporation heater 72.
- This is in accordance with the principles of the present invention provided as a so-called PTC element. That is, by energizing too Exciting Verdamfungsheizelement 72 has an electrical resistance on, which increases with increasing temperature and in a corresponding manner decreases with decreasing temperature.
- the evaporator medium 34 to a for Evaporate suitable temperature for example in the range of 400 ° C. are heated, it is by means of a drive device, not shown the evaporation heating element 72 is energized. It is preferred in clocked fashion, i.
- a voltage is applied to the evaporation heater 72.
- For temperature detection For example, in the driving device information be laid down about the relationship between the electric Resistance and thus the current flowing at a given voltage electrical Current and the temperature in the area of the evaporation heating element 72 reproduces. It is determined that the current flow is one for the desired temperature expected to flow, so Can gradually increase the heating power by shortening the intervals while which the voltage is applied, can be reduced, i. it will also reduces the duty cycle.
- the evaporation heating element 72 are operated at a power, the essentially only keeping the temperature constant.
Abstract
Description
- Fig. 1
- eine Explosionsansicht der wesentlichen Komponenten eines Verdampferbrenners gemäß einer ersten Ausgestaltungsform der vorliegenden Erfindung;
- Fig. 2
- eine Längsschnittansicht des in Fig. 1 dargestellten Verdampferbrenners;
- Fig. 3
- eine Zusammenbauansicht der die verschiedenen Heizeinrichtungen umfassenden Baugruppen des in Fig. 1 dargestellten Verdampferbrenners;
- Fig. 4
- eine Explosionsansicht einer alternativen Ausgestaltungsart der die beiden Heizeinrichtungen umfassenden Baugruppe des in Fig. 1 dargestellten Verdampferbrenners;
- Fig. 5
- die in Fig. 4 dargestellte Baugruppe im Zusammenbau;
- Fig. 6
- eine Explosionsansicht der wesentlichen Komponenten eines Verdampferbrenners gemäßeiner alternativen Ausgestaltungsart der vorliegenden Erfindung;
- Fig. 7
- eine Längsschnittansicht des Verdampferbrenners der Fig. 6, geschnitten in einer eine Längsmittelachse des Verdampferbrenners nicht enthaltenden Ebene;
- Fig. 8
- eine Schnittansicht des in Fig. 6 dargestellten Verdampferbrenners, geschnitten in einer die Längsmittelachse enthaltenden Ebene;
- Fig. 9
- die die verschiedenen Heizeinrichtungen des Verdampferbrenners der Fig. 6 aufweisende Baugruppe im Zusammenbau;
- Fig. 10
- die beiden beim Verdampferbrenner der Fig. 6 eingesetzten Heizeinrichtungen;
- Fig. 11
- eine alternative Ausgestaltungsart der zum Verdampfen des Brennstoffs und zum Verteilen desselben eingesetzten Heizeinrichtung;
- Fig. 12
- eine Explosionsansicht der die beiden Heizeinrichtungen des Verdampferbrenners der Fig. 6 aufweisenden Baugruppe gemäß einer alternativen Ausgestaltungsart;
- Fig. 13
- eine Explosionsansicht einer die beiden Heizeinrichtungen und das Verdampfermedium aufweisenden Baugruppe gemäß einer alternativen Ausgestaltungsart;
- Fig. 14
- die bei der Ausgestaltungsart gemäß Fig. 13 vorgesehenen Verdampfermediumträger;
- Fig. 15
- eine Schnittansicht der in den Fig. 13 und 14 dargestellten Baugruppe;
- Fig. 16
- eine Abwandlung der in den Fig. 13 - 15 dargestellten Baugruppe in perspektivischer Rückansicht.
Claims (30)
- Verdampferbrenner, umfassend:ein Verdampfermedium (34) zum Einspeisen von Brennstoffdampf in eine Brennkammer (52),eine erste Heizeinrichtung (70), umfassend wenigstens ein zum Zünden von in der Brennkammer (52) vorhandenem Brennstoffdampf wenigstens mit seinem Heizbereich in die Brennkammer (52) ragendes Zündheizelement (70),eine zweite Heizeinrichtung (72), umfassend wenigstens ein dem Verdampfermedium (34) zur Beeinflussung von dessen Verdampfungscharakteristik zugeordnetes Verdampfungsheizelement (72).
- Verdampferbrenner nach Anspruch 1,
dadurch gekennzeichnet, dass das wenigstens eine Verdampfungsheizelement (72) an einer von der Brennkammer (52) abgewandten Seite des Verdampfermediums (34) angeordnet ist. - Verdampferbrenner nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass das Verdampfermedium (34) an einem Verdampfermediumträger (32) vorgesehen ist und dass das wenigstens eine Verdampfungsheizelement (72) zwischen dem Verdampfermedium (34) und dem Verdampfermediumträger (32) angeordnet ist. - Verdampferbrenner nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass das Verdampfermedium (34) an einem Verdampfermediumträger (32) vorgesehen ist und dass das wenigstens eine Verdampfungsheizelement (72) an einer vom Verdampfermedium (34) abgewandten Seite des Verdampfermediumträgers (32) vorgesehen ist. - Verdampferbrenner nach einem der Ansprüche 1 bis 4,
gekennzeichnet durch eine Brennstoffzuführkanalanordnung (60; 86, 56) zum Einleiten von flüssigem Brennstoff in das Verdampfermedium (34). - Verdampferbrenner nach Anspruch 5,
dadurch gekennzeichnet, dass die Brennstoffzuführkanalanordnung 60; 86, 56) zur Verteilung des flüssigen Brennstoffs über das Verdampfermedium (34) hinweg ausgebildet ist. - Verdampferbrenner nach Anspruch 6,
dadurch gekennzeichnet, dass die Brennstoffzuführkanalanordnung (60; 86, 56) wenigstens einen ringartigen Kanalbereich (86, 56) oder/und wenigstens einen von einer Brennstoffzuführleitung (56) im Wesentlichen radial ausgehenden Radialkanalbereich (60) in dem Verdampfermedium (34) oder/und einem Verdampfermediumträger (32) aufweist. - Verdampferbrenner nach einem der Ansprüche 1 bis 7,
gekennzeichnet durch eine Luftzuführkanalanordnung zum Zuführen von mit dem Brennstoffdampf zu verbrennender Luft in die Brennkammer (52). - Verdampferbrenner nach Anspruch 8,
dadurch gekennzeichnet, dass die Luftzuführkanalanordnung in einer die Brennkammer (52) begrenzenden Wandung wenigstens eine zur Brennkammer (52) hin offene Lufteintrittsöffnung (50; 84, 92) aufweist. - Verdampferbrenner nach Anspruch 8 oder 9,
dadurch gekennzeichnet, dass die Luftzuführkanalanordnung wenigstens eine zu dem Verdampfermedium (34) hin offene Lufteintrittsöffnung (74) aufweist. - Verdampferbrenner nach einem der Ansprüche 8 bis 10,
dadurch gekennzeichnet, dass die Luftzuführkanalanordnung wenigstens einen das Verdampfermedium (34) durchsetzenden Luftzuführkanalbereich (92, 66, 68) aufweist. - Verdampferbrenner nach einem der Ansprüche 1 bis 11,
dadurch gekennzeichnet, dass das wenigstens eine Verdampfungsheizelement (72) und das Verdampfermedium (34) an einem aus Keramikmaterial gebildeten Verdampfermediumträger (32) vorgesehen sind. - Verdampferbrenner nach einem der Ansprüche 1 bis 12,
dadurch gekennzeichnet, dass das Verdampfermedium (34) vorzugsweise mehrlagig angeordnetes poröses Material umfasst. - Verdampferbrenner nach einem der Ansprüche 1 bis 13,
dadurch gekennzeichnet, dass das Verdampfermedium (34) Vliesmaterial (36, 38) umfasst. - Verdampferbrenner nach einem der Ansprüche 1 bis 13,
gekennzeichnet durch eine Reinigungsanordnung (100) zum Entfernen von im Bereich der Brennkammer (52) im Verbrennungsbetrieb sich ablagernden Ablagerungen. - Verdampferbrenner nach Anspruch 15,
dadurch gekennzeichnet, dass die Reinigungsanordnung (100) eine Heizanordnung (72) umfasst, durch welche im Bereich der Brennkammer (52) eine im Bereich oder über einer Abbrandtemperatur der Ablagerungen liegende Temperatur erzeugbar ist. - Verdampferbrenner nach Anspruch 16,
dadurch gekennzeichnet, dass die Heizanordnung (72) zur Erzeugung der im Bereich oder über der Abbrandtemperatur liegenden Temperatur wenigstens im Bereich des Verdampfermediums (34) ausgebildet ist. - Verdampferbrenner nach Anspruch 17,
dadurch gekennzeichnet, dass die Heizanordnung (72) die zweite Heizeinrichtung (72) umfasst. - Reinigungsverfahren zum Reinigen eines Heizbrenners, insbesondere eines Verdampferbrenners nach einem der Ansprüche 16 bis 18,
bei welchem Reinigungsverfahren durch Aktivieren einer Heizanordnung (72) Ablagerungen an einer eine Brennkammer (52) umgebenden Wandung auf eine Temperatur im Bereich oder über einer Abbrandtemperatur der Ablagerungen erhitzt und dabei abgebrannt werden. - Reinigungsverfahren nach Anspruch 19,
dadurch gekennzeichnet, dass das Reinigungsverfahren dann durchgeführt wird, wenn der Heizbrenner nicht in einem Heiz-Betriebszustand ist. - Reinigungsverfahren nach Anspruch 20,
dadurch gekennzeichnet, dass das Reinigungsverfahren anschließend an eine Heiz-Betriebszustandsphase des Heizbrenners durchgeführt wird. - Reinigungsverfahren nach einem der Ansprüche 19 bis 21,
dadurch gekennzeichnet, dass das Verfahren nach einer vorgegebenen Betriebsdauer des Heizbrenners durchgeführt wird. - Reinigungsverfahren nach einem der Ansprüche 19 bis 22,
dadurch gekennzeichnet, dass bei Durchführung des Reinigungsverfahrens die Heizanordnung (72) mit einem Tastverhältnis von weniger als Eins angesteuert wird. - Verdampferbrenner nach einem der Ansprüche 1 bis 17,
gekennzeichnet durch eine Ansteuervorrichtung, durch welche die Heizleistung wenigstens der zweiten Heizeinrichtung (72) einstellbar ist, wobei ein Überwachungsmodul die Heizleistung oder/und die geforderte Heizleistung der zweiten Heizeinrichtung (72) überwacht und beruhend auf dem Überwachungsergebnis das Vorhandensein einer Brennstoffverdampfung erkennt. - Verdampferbrenner nach einem der Ansprüche 1 bis 24,
dadurch gekennzeichnet, dass das Verdampfungsheizelement (72) ein elektrisch betriebenes Heizelement mit bei zunehmender Temperatur ansteigendem elektrischen Widerstand umfasst. - Verfahren zur Überwachung der Brennstoffzufuhr zu einem Verdampferbrenner, insbesondere nach einem der Ansprüche 1 bis 17 oder 24 oder 25, wobei der Verdampferbrenner eine zur Unterstützung der Brennstoffverdampfung vorgesehene Heizeinrichtung (72) aufweist, bei welchem Verfahren beruhend auf der Heizleistung der Heizeinrichtung (72) oder/und einer Änderung der Heizleistung der Heizeinrichtung (72) oder/und einer geforderten Änderung der Heizleistung der Heizeinrichtung (72) bestimmt wird, ob in einer Brennkammer (52) des Verdampferbrenners (10) eine Brennstoffverdampfung vorhanden ist.
- Verfahren nach Anspruch 26,
dadurch gekennzeichnet, dass bei während des Betreibens der Heizeinrichtung (72) ansteigender Heizleistung oder/und geforderter höherer Heizleistung auf Vorliegen einer Brennstoffverdampfung erkannt wird. - Verfahren nach Anspruch 26 oder 27,
dadurch gekennzeichnet, dass bei einem Zündvorgang des Verdampferbrenners in einer ersten Betriebsphase die Heizeinrichtung (72) mit höherer, vorzugsweise im Bereich einer maximalen Heizleistung liegender Heizleistung betrieben wird, in einer nachfolgenden zweiten Betriebsphase die Heizeinrichtung (72) mit verminderter, vorzugsweise abnehmender Heizleistung betrieben wird und in einer weiter nachfolgenden dritten Betriebsphase die Heizeinrichtung (72) mit wieder erhöhter, vorzugsweise zunehmender Heizleistung betrieben wird, wobei bei oder nach Übergang in die dritte Betriebsphase auf Vorliegen einer Brennstoffverdampfung erkannt wird. - Verfahren nach einem der Ansprüche 26 bis 28,
dadurch gekennzeichnet, dass dann, wenn auf Vorliegen einer Brennstoffverdampfung erkannt wird, eine das Zünden des verdampften Brennstoffes unterstützende Heizeinrichtung (70) aktiviert wird. - Verfahren nach einem der Ansprüche 26 bis 29,
dadurch gekennzeichnet, dass in einer Betriebsphase, in welcher der Verbrennungsbetrieb des Verdampferbrenners eingestellt wird, die die Verdampfung unterstützende Heizeinrichtung (72) aktiviert wird oder aktiviert ist und dass beruhend auf einer Abnahme der Heizleistung erkannt wird, dass keine Brennstoffverdampfung mehr vorliegt.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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DE2001130638 DE10130638A1 (de) | 2001-06-26 | 2001-06-26 | Verdampferbrenner |
DE10130638 | 2001-06-26 | ||
DE2001136292 DE10136292A1 (de) | 2001-07-25 | 2001-07-25 | Verdampferbrenner |
DE10136292 | 2001-07-25 |
Publications (3)
Publication Number | Publication Date |
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EP1275901A2 true EP1275901A2 (de) | 2003-01-15 |
EP1275901A3 EP1275901A3 (de) | 2003-10-15 |
EP1275901B1 EP1275901B1 (de) | 2007-09-05 |
Family
ID=26009586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP02014269A Expired - Lifetime EP1275901B1 (de) | 2001-06-26 | 2002-06-26 | Verdampferbrenner |
Country Status (6)
Country | Link |
---|---|
US (2) | US6726114B2 (de) |
EP (1) | EP1275901B1 (de) |
JP (1) | JP2003090512A (de) |
CZ (1) | CZ305020B6 (de) |
DE (1) | DE50210836D1 (de) |
RU (1) | RU2287109C2 (de) |
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WO2006056179A1 (de) * | 2004-11-26 | 2006-06-01 | Webasto Ag | Baugruppe für ein heizgerät sowie verfahren zur herstellung derselben |
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DE102005004359A1 (de) * | 2005-01-31 | 2006-08-03 | J. Eberspächer GmbH & Co. KG | Brennkammergehäuse für einen Verdampferbrenner |
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EP1484552A1 (de) * | 2003-06-05 | 2004-12-08 | J. Eberspächer GmbH & Co. KG | Brennkammeranordnung für einen Verdampferbrenner, insbesondere für ein Fahrzeugheizgerät |
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DE102011077891B3 (de) * | 2011-06-21 | 2012-12-06 | J. Eberspächer GmbH & Co. KG | Verdampferbaugruppe, insbesondere für ein Fahrzeugheizgerät |
EP2538135A2 (de) | 2011-06-21 | 2012-12-26 | J. Eberspächer GmbH & Co. KG | Verdampferbaugruppe, insbesondere für ein Fahrzeugheizgerät |
US9297529B2 (en) | 2011-06-21 | 2016-03-29 | Eberspächer Climate Control Systems GmbH & Co. KG | Evaporator assembly unit, especially for a vehicle heater |
DE102011085076B4 (de) | 2011-10-24 | 2022-07-07 | Eberspächer Climate Control Systems GmbH | Heizgerät, insbesondere für ein Fahrzeug und Verfahren zum Betreiben eines Heizsystems |
CN104566360A (zh) * | 2013-10-14 | 2015-04-29 | 埃贝斯佩歇气候控制系统有限责任两合公司 | 用于蒸发器燃烧炉的燃烧室组件的底板组件 |
US9857081B2 (en) | 2013-10-14 | 2018-01-02 | Eberspächer Climate Control Systems GmbH & Co. KG | Bottom assembly unit for a combustion chamber assembly unit of a vaporizing burner |
CN104566360B (zh) * | 2013-10-14 | 2017-08-29 | 埃贝斯佩歇气候控制系统有限责任两合公司 | 用于蒸发器燃烧炉的燃烧室组件的底板组件 |
CN107614975A (zh) * | 2015-06-02 | 2018-01-19 | 株式会社三五 | 蒸发式燃烧器 |
WO2019219510A1 (de) * | 2018-05-15 | 2019-11-21 | Webasto SE | Verdampferbaugruppe für mobile heizgeräte |
US11530813B2 (en) | 2018-05-15 | 2022-12-20 | Webasto SE | Evaporator assembly for mobile heating devices |
Also Published As
Publication number | Publication date |
---|---|
US20040173692A1 (en) | 2004-09-09 |
CZ20022221A3 (cs) | 2003-02-12 |
US6726114B2 (en) | 2004-04-27 |
RU2287109C2 (ru) | 2006-11-10 |
DE50210836D1 (de) | 2007-10-18 |
JP2003090512A (ja) | 2003-03-28 |
US6988885B2 (en) | 2006-01-24 |
CZ305020B6 (cs) | 2015-04-01 |
EP1275901A3 (de) | 2003-10-15 |
US20030027090A1 (en) | 2003-02-06 |
EP1275901B1 (de) | 2007-09-05 |
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