Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D3/00—Burners using capillary action
  • F23D3/02—Wick burners
  • F23D3/18—Details of wick burners
  • F23D3/22—Devices for mixing evaporated fuel with air
• • 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
• • 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
  • F23C7/02—Disposition of air supply not passing through burner
  • F23C7/06—Disposition of air supply not passing through burner for heating the incoming air
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
  • F23D11/36—Details, e.g. burner cooling means, noise reduction means
  • F23D11/44—Preheating devices; Vaporising devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
  • F23D11/36—Details, e.g. burner cooling means, noise reduction means
  • F23D11/44—Preheating devices; Vaporising devices
  • F23D11/441—Vaporising devices incorporated with burners
  • F23D11/443—Vaporising devices incorporated with burners heated by the main burner flame
• • 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
  • F23D14/12—Radiant burners
  • F23D14/14—Radiant burners using screens or perforated plates
  • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
• • 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
  • F23D2900/00016—Preventing or reducing deposit build-up on burner parts, e.g. from carbon
• • 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
  • F23D2900/21—Burners specially adapted for a particular use
  • F23D2900/21002—Burners specially adapted for a particular use for use in car heating systems

Definitions

• the present invention relates to an evaporator burner for a mobile heater.
• Mobile heaters are known, e.g. can be used as vehicle heaters for heating a vehicle.
• mobile heaters are e.g. as a heater, which can provide additional heat while the drive motor of the vehicle, or as a heater, which can provide both heating and stationary drive motor heat for heating purposes, used.
• a “mobile heater” is understood to mean a heater which is designed for use in mobile applications and adapted accordingly, in particular that it is transportable (possibly permanently installed in a vehicle or merely accommodated for transport therein ) and not exclusively for a permanent, stationary use, as is the case, for example, when heating a building, in which case the mobile heater can also be fixed in a vehicle (land vehicle, ship, etc.), in particular in a vehicle In particular, it can be designed for heating a vehicle interior, such as a land vehicle, watercraft or aircraft, as well as a partially open space, such as can be found on ships, in particular yachts Heater can also be used temporarily stationary, such as in large tents, Containe According to an advantageous development, the mobile heater is designed as a stationary or auxiliary heater for a land vehicle, such as for a caravan, a motor home, a bus, a car, etc.
• liquid fuel which may correspond to the fuel, for example, which is also used for an internal combustion engine of the vehicle, such as gasoline, diesel or ethanol, fed via a fuel pipe to an evaporator body, which consists of a porous, absorbent material.
• the fuel is evaporated.
• the fuel is mixed with also supplied combustion air and reacted in an exothermic reaction with the release of heat.
• the evaporator burners are usually not operated continuously, but depending on the Schutuls 130 relatively often on and off again. When switching off is usually first by turning off a Fuel supply pump stopped the fuel supply and initially continue to supply combustion air to allow a residue-free, clean burnout as possible.
• a standing fuel column is already present in the fuel tube during the burnout, in which there is still a high temperature in a combustion chamber of the burner. If there is a relatively good thermal connection between the combustion chamber and the fuel tube, a high level of heat can be applied to a stationary fuel column in the fuel tube, in particular in the period immediately after the interruption of the fuel supply. As a result, for example, polymerization of fuel constituents in the fuel tube may occur, which may result in deposits in the fuel tube that are not soluble in the unaltered fuel. These deposits can lead to an increase in the flow resistance in the combustion tube and ultimately to a clogging of the fuel supply.
• the evaporator burner comprises: a combustion chamber surrounding a combustion chamber for converting fuel with combustion air; an evaporator receptacle for receiving an evaporator body for evaporating liquid fuel, which is arranged at a rear side of the combustion chamber; a burner cap, the back of the combustion chamber
• Evaporator recording opens.
• the fuel tube is thermally coupled to the burner cap and the burner cap is provided with an air heat exchanger for cooling the burner cap, can be passed through the supplied during operation combustion air.
• the burner cap via the air heat exchanger efficiently by heat transfer to the supplied combustion air at a relatively low Tempe- temperature level. Since the burner cap is used as a heat sink for the fuel tube, can be dispensed with an additional, designed as a separate component heat sink for the fuel tube, which allows a cost-effective and compact design. Since an undesirably high temperature rise in the region of the combustion tube can be prevented, the risk of blockages in the fuel tube is reduced.
• the air heat exchanger may for example be formed as a separate component or be formed integrally with the burner cover of the material of the burner cover.
• the burner cap is connected to the combustion chamber only via a substantially linear contact point.
• the heat conduction from the combustion chamber to the burner cover is suppressed, since the linear contact point makes possible at most a weak heat conduction in the direction of the burner cover.
• the combustion lid can thus be reliably maintained at a relatively low temperature level and forms a reliable heat sink for the fuel tube. It is e.g. but also possible to design the burner cover in another way thermally isolated from the combustion chamber and other hot components.
• the air heat exchanger has a plurality of heat exchanger fins.
• good heat transfer to the supplied combustion air is achieved by a large surface area, so that heat can be efficiently removed from the burner cover.
• the heat exchanger fins may have various shapes.
• the air heat exchanger is arranged in the combustion air supply upstream of the combustion chamber.
• the air heat exchanger can be arranged immediately upstream of the combustion chamber in order to achieve a particularly compact construction.
• the combustion air can be preheated by the heat transfer before entering the combustion chamber.
• the burner cap is made of aluminum or an aluminum alloy. Compared to a configuration in which the burner cap is made of, for example, stainless steel, this embodiment provides efficient heat distribution and dissipation in the burner cap due to the high thermal conductivity of aluminum or aluminum alloy bars so that the dissipated heat is efficiently dissipated to the air heat exchanger.
• the burner cover and the evaporator receptacle are designed as separate components. In this case, an undesirably high heat input from the evaporator receptacle into the burner cap can be reliably prevented so that the burner cap as a heat sink can be kept at a low temperature.
• the combustion chamber has a plurality of holes for supplying combustion air into the combustion chamber.
• Fig. 1 is a schematic representation of an evaporator burner for a mobile heater in the range of an evaporator receptacle and a burner cap.
• FIG. 1 schematically shows a region of an evaporator receptacle 2 and a burner cap 8 of FIG
• Evaporator burner 1 shown for a mobile heater.
• a schematic sectional view in a plane is shown, which contains a main axis Z of the evaporator burner 1.
• the evaporator burner 1 may, for example, essentially have a rotational symmetry with respect to the main axis Z.
• the evaporator burner 1 may be formed, for example, for a vehicle heater, in particular a heater or a heater.
• the evaporator burner 1 is in particular designed to convert a mixture of vaporized fuel and combustion air with the release of heat in a combustion chamber 4. The heat released is transferred in a heat exchanger (not shown) to a medium to be heated, which may be formed, for example, by air or a cooling liquid.
• the heat exchanger the discharge for the hot combustion gases, the likewise provided combustion air delivery device (eg a fan), the fuel delivery device (eg a metering pump), the control unit for controlling the evaporator burner 1, etc. are not in the schematic representation of FIG shown.
• combustion air delivery device eg a fan
• fuel delivery device eg a metering pump
• the evaporator burner 1 has an evaporator receptacle 2 in which a porous, absorptive evaporator body 5 is arranged.
• the evaporator receptacle 2 has a substantially pot-shaped form with a hole in the bottom.
• the vaporizer body 5 is received in the pot-like recess of the evaporator receptacle 2 and in particular can be held firmly therein, e.g. by welding, soldering, jamming or with the aid of a suitable fuse element.
• Evaporator body 5 may e.g. in particular be formed by a metal fiber fleece or a plurality of layers of metal fiber fleece.
• a fuel pipe 6 for supplying fuel to the evaporator body 5.
• the fuel pipe 6 opens into the evaporator receptacle 2 and communicates with a (not shown) fuel delivery device, via which fuel can be conveyed through the fuel pipe 6 in a predetermined amount, as shown schematically by an arrow B.
• the fuel tube 6 is, e.g. by welding or soldering firmly connected to the evaporator receptacle 2.
• the combustion chamber 4 is circumferentially bounded by a combustion chamber 7, e.g. may be formed by a substantially cylindrical member made of a temperature-resistant steel.
• the combustion chamber 7 is provided with a plurality of holes 7a, via the combustion air into the combustion chamber 4 can be fed, as shown schematically in Fig. 1 by branched arrows L.
• the burner cap 8 is made of aluminum or an aluminum alloy and may be produced, for example, in a casting process.
• the burner cover 8 also has a substantially pot-like shape and is arranged such that a circumferential side wall surrounds the evaporator receptacle 2.
• the burner cover 8 and the evaporator receptacle 2 are formed as separate components, which are arranged spatially spaced from each other.
• a passage opening is provided, through which the fuel tube 6 passes.
• the combustion chamber 7 is fixedly connected to the burner cover 8, so that the combustion chamber 4 at the back is closing.
• the combustion chamber 7 is connected to the burner cover 8 only via a substantially linear contact point.
• the circumferential side wall of the burner cover 8 has a circumferential, narrow, projecting rib 8a, on which the combustion chamber 7 is fastened substantially linearly.
• the combustion chamber 7 can eg by welding, soldering or
• the fuel tube 6 is thermally coupled to the burner cover 8, so that heat transfer from the fuel tube 6 to the burner cover 8 can take place.
• the fuel tube 6 has a circumferential projection 6a, via which the fuel tube 6 is thermally conductively connected to the burner cover 8.
• the compound can e.g. be realized by soldering or welding.
• the fuel tube 6 may be connected in a thermally conductive manner with the burner cover 8 in another way. It can e.g. between the fuel tube 6 and the burner cap 8 also a thermally conductive element, such as e.g. a nickelleitpad be provided for heat transfer.
• the burner cap 8 is provided with an air heat exchanger 8b for cooling or dissipating heat from the burner cap 8.
• the air heat exchanger 8 b has a plurality of heat exchanger fins (preferably a plurality of heat exchanger fins) which are distributed over the outer circumference of the burner cover 8.
• the heat exchanger ribs protrude into the combustion air flow in a combustion air supply upstream of the combustion chamber 4.
• the heat exchanger ribs are in operation flows around the supplied combustion air, as shown schematically in Fig. 1 by arrows L, so that combustion air is passed through the air heat exchanger 8b and this way the burner cap 8 is cooled.
• the air heat exchanger 8b may for example be formed integrally with the burner cover 8 of the material of the burner cover 8 or be coupled as a separate component thermally conductive to the burner cover 8.
• the air heat exchanger 8b may be formed by formed on the outer wall of the burner cover 8 heat exchanger fins.
• the fuel pipe 6 is thermally connected to the burner cover 8 by the described design, so that the burner cover 8 serves as a heat sink for the fuel pipe 6. Due to the configuration of aluminum or an aluminum alloy, the burner cap 8 has a high thermal conductivity and the heat is efficiently conducted to the air heat exchanger 8b, where it is discharged to the supplied combustion air.
• the temperature of the burner cover 8 is kept as low as possible in operation, that a thermal insulation of the burner cap 8 is provided by hot components. This is achieved, for example, by virtue of the fact that the combustion chamber 7 is connected to the burner cover 8 only via a substantially line-shaped contact point and not via a flat support.
• the burner cover 8 effectively serves as a heat sink for the fuel pipe 6 in the manner described, sticking or clogging of fuel in the fuel pipe 6 can be reliably prevented by undesirably high heat without providing a separate heat sink as a separate, further component will need.
• the combustion chamber 4 is in a known manner by a heat exchanger for transferring the heat released to a medium to be heated, such. Air or a liquid, surrounded. Furthermore, a housing is provided in a conventional manner, in which the evaporator burner is received and which provides an adequate air flow for the combustion air supply.

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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)
• Air-Conditioning For Vehicles (AREA)
• Wick-Type Burners And Burners With Porous Materials (AREA)
• Spray-Type Burners (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=46026593

Family Applications (1)

Country Status (7)

Cited By (5)

Families Citing this family (16)

Citations (3)

Family Cites Families (12)

• 2011
  • 2011-04-30 DE DE102011050025A patent/DE102011050025A1/de not_active Withdrawn
• 2012
  • 2012-04-05 RU RU2013153267/06A patent/RU2567343C2/ru active
  • 2012-04-05 KR KR1020137031416A patent/KR101538568B1/ko active IP Right Grant
  • 2012-04-05 EP EP12718585.8A patent/EP2705299B1/de active Active
  • 2012-04-05 WO PCT/DE2012/100093 patent/WO2012149928A1/de active Application Filing
  • 2012-04-05 US US14/110,241 patent/US20140193759A1/en not_active Abandoned
  • 2012-04-05 CN CN201280020948.2A patent/CN103502731B/zh active Active

Patent Citations (3)

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