Classifications

• • 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
  • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
• • 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 invention relates to a burner for a mobile, fuel-operated heating device, in particular for a vehicle heating device, and a mobile, fuel-operated heating device, in particular for a vehicle heating device, as well as a method for producing a burner.
• Burners in particular evaporator burners, are used in particular in auxiliary and / or auxiliary heaters operated with liquid fuel, in particular for vehicles.
• liquid fuel is introduced into an evaporator via a fuel supply line.
• a fuel supply line As the evaporator itself, for. B. metal fiber fleeces are used.
• the evaporator sucks in liquid fuel, in particular via capillary action, and distributes liquid fuel.
• liquid fuel is evaporated and ignited, so that the fuel can be burned with the supply of air.
• air supply openings are arranged in a peripheral wall. Such an arrangement is known, for example, from DE 10 2018 111 636 A1.
• DE 10 2005 032 980 B4 discloses an evaporator burner which comprises a combustion chamber housing in which an evaporator medium is received in a shell-like carrier.
• a fuel supply line is accommodated in the bottom area of the combustion chamber housing.
• the combustion chamber housing has a circumferential wall which is provided with exactly one row of air supply openings arranged in the circumferential direction.
• the air supply openings each have a radial direction of extent, ie parallel to one Circumferential wall normals.
• Such a perforation of the combustion chamber has the disadvantage that fuel and air are inhomogeneously distributed in the combustion chamber and the combustion thus takes place in an undefined manner in the sense of an ideal combustion process, which is characterized by complete and low-emission combustion. This can cause soot formation and greatly increased NOx emissions.
• the distribution of air and fuel and thus the combustion can be improved through an empirical design of the perforation.
• combustion chamber assembly is known from DE 10 2012 211 932 B3.
• This combustion chamber assembly has a plurality of combustion air inlet openings, of which at least one of the combustion air inlet openings has an opening longitudinal axis which is inclined with respect to a surface normal of the circumferential wall in the region of the combustion air inlet opening.
• the combustion air inlet openings can be arranged in several rows.
• the combustion air inlet openings of different rows can have different angles of inclination of the longitudinal axes of the openings.
• the combustion air inlet opening is inclined to such an extent that, when viewed in the direction of the surface normal, there is no residual radial opening. In the case of a high angle of inclination greater than 40 °, the depth of penetration is in particular insufficient.
• the heating device has a low-pressure atomizer.
• the heating device has inclined swirl openings in a circumferential wall.
• the object of the invention is to provide an improved burner for a mobile, fuel-operated heating device and a mobile, fuel-operated heating device, as well as a method for producing an evaporator receptacle.
• the object of the invention is achieved with regard to the burner by the features of claim 1, with regard to the heating device by the features of claim 12, and with regard to the method by the features of claim 13. Appropriate refinements result from the respective subclaims.
• the burner according to the invention for a mobile, fuel-operated heating device comprises an evaporator receptacle for receiving an evaporator module for distributing and evaporating liquid fuel and at least one fuel supply line for supplying liquid fuel to the evaporator module.
• the evaporator assembly includes at least one evaporator.
• an evaporator can be formed from a metal mesh or a porous material with a large surface area.
• a burner is understood to mean a component arrangement, in particular a component, to which fuel and combustion air are supplied for conversion into heat, in particular for a combustion process.
• the burner has a combustion chamber.
• the burner has a peripheral wall with a plurality of air supply openings.
• the peripheral wall preferably partially delimits the combustion chamber.
• the air supply openings are arranged in at least one row.
• the air supply openings can lie exactly or approximately on a straight or curved line extending along the row. "Approximately” should be understood to mean that the air supply openings are clearly assigned to the row by an observer, in particular the distance between the air supply opening and the line extending along the row is significantly smaller than the distance between two air supply openings in the row optionally extend in the circumferential direction.
• the air supply openings of the row in this embodiment lie on a circumferential circle.
• the row can lie on an oblique cut so that the row lies obliquely to the circumferential direction Air supply openings of the row thus lie on an elliptical section of the circumferential wall. Furthermore, the row can extend spirally along the circumferential wall.
• the air supply openings in the at least one row comprise at least one first air supply opening with a first opening longitudinal axis, a first entry surface and a first exit surface and at least one second air supply opening each with a second opening longitudinal axis, a second entry surface and a second exit surface.
• the first longitudinal axis of the opening forms a first angle to a circumferential wall normal of the first air supply opening.
• the second longitudinal axis of the opening has a second angle (which differs from the first angle, in particular differs from the first angle in terms of amount) to a normal to the circumference of the wall of the second air supply opening.
• the first angle and the second angle are preferably selected such that the first entry surface with the first exit surface and the second entry surface with the second exit surface at least partially overlap in the projection direction of the circumferential wall normal. If one looks at an air supply opening in the direction normal to the circumference, a continuous opening can preferably be seen at least in sections. Thus, at least two different air supply openings are arranged in the row. Such an arrangement has the advantage that a swirl, a penetration depth and thus also the mixing of combustion air and fuel are considerably improved. The combustion takes place in a more defined manner and nitrogen oxide emissions can be reduced.
• the air supply openings are arranged along at least two, in particular two to four, rows in the circumferential direction of the circumferential wall, each row comprising at least one first air supply opening and a second air supply opening.
• the first angle and the second angle are a maximum of 40 °, preferably 7 ° to 35 °, more preferably 8 ° to 30 °.
• first angle can be 0 °.
• first longitudinal axis of the opening is aligned parallel to the normal to the circumferential wall.
• the first angle and / or the second angle can / can lie in a plane that is spanned by the normal to the wall of the circumference and a circumferential direction (at the location of the respective air supply opening). Alternatively or additionally, the first angle and / or the second angle can lie in a (respective) plane that is spanned by the respective row.
• the first angle and / or the second angle can lie in a plane that is spanned by the normal to the circumferential wall (at the location of the respective air supply opening) and a central axis of the circumferential wall.
• the first angle and / or the second angle can lie in a plane that is spanned by the circumferential normal (at the location of the respective air supply opening) and a perpendicular to a plane spanned by the respective row.
• first angle and / or the second angle can run obliquely to a (or the above) plane which is separated from the
• first angle and / or the second angle can run obliquely to a plane which is spanned by the respective row (of air supply openings).
• the air supply openings furthermore comprise third air supply openings or third and fourth air supply openings which have a third angle different from the first angle and the second angle and optionally a fourth different angle.
• the air intakes may include a plurality of air supply openings each having different angles. Even if in principle each air supply opening can have a different angle to all other air supply openings, the exact design of the burner is e.g. B. by means of flow simulation may be expensive.
• air supply openings that are adjacent at least in the circumferential direction are air supply openings with different angles. This is achieved, for example, by an arrangement in which the first and second air supply openings alternate. The next row can then begin offset.
• the air supply openings can be arranged along the circumferential direction in a periodic pattern, in particular all rows of air supply openings having the same pattern.
• a pattern can e.g. B. A-B-A-B; A-B-C-A-B-C, A-A-B-B-A-A-B-B, A-A-B-A-A-B, A-B-C-B-A-B-C.
• the air supply openings can be arranged axially symmetrically with respect to the central axis of the circumferential wall.
• the air supply openings are expediently arranged at the same distance along the circumferential direction. Only the air supply openings of a respective row can have the same distance from one another or have the same distance from one another in all rows.
• the thickness of the circumferential wall can differ from the thickness of the rest of the circumferential wall at least in the region of a part of the air supply openings. This can be, for example, a local thickening of the circumferential wall in the area of one, several or all of the air supply openings.
• the peripheral wall is arranged on an evaporator receiving body. Such a
• the evaporator receptacle expediently has a base area.
• the peripheral wall advantageously extends from the floor area.
• the fuel supply line can open into the bottom area of the evaporator receptacle.
• the mobile heating device according to the invention in particular mobile vehicle heating device, comprises a burner according to the invention.
• a heating device is particularly suitable for use in land vehicles.
• the method according to the invention for producing a burner preferably one, in particular the above burner, comprises:
• Flow simulations and heat distribution simulations in particular can be used for the arrangement of the first and second air supply openings.
• the openings can be drilled or milled, for example, or they can be molded with the burner, in particular the evaporator receptacle.
• FIG. 2 shows a second view of the evaporator mounting arrangement from FIG. 1;
• Fig. 5 partial section perpendicular to a row of air supply openings of an embodiment
• FIG. 6 shows a partial section perpendicular to a row of air supply openings of an alternative embodiment.
• the evaporator receiving body 2 has a base region 6. In the bottom area 6 opens the
• Fuel supply line 4 can be designed, for example, as a pipe.
• the bottom area 6 has a recess which is suitable for receiving an evaporator assembly, in particular the evaporator.
• a circumferential wall 8 extends from the base region 6.
• the circumferential wall is configured to be cylindrical in sections and conical in sections. Alternatively, an exclusively cylindrical configuration is also possible.
• a receiving element 10 is arranged, which is suitable for receiving an ignition element and / or a flame monitor.
• the height of the receiving element 10 measured from the bottom area is matched in particular to the size of the evaporator assembly.
• a plurality of air supply openings 12 are provided in the peripheral wall 8.
• the air supply openings 12 are arranged in two rows 20, 22 in the circumferential direction. However, an arrangement in just one row or in several rows is also possible. In FIG. 1, the number of air supply openings 12 in row 20 is greater than in row 22, which is particularly also visible in the view according to FIG. 2. In the row 20, the distance between the air supply openings 12 also varies.
• first and second air supply openings 14, 15 are arranged as air supply openings and in the row 20 third and fourth air supply openings 16, 17 are arranged as air supply openings.
• the first air supply opening 14 is designed here with a first angle a1 of 0 °.
• the normal to the wall of the circumference i.e. the perpendicular of the wall, in the area of the air supply opening and a first longitudinal axis of the opening are parallel to one another.
• the first inlet surface and the first outlet surface completely overlap in projection along the normal to the circumferential wall.
• the second air supply opening 15 is formed at an angle here.
• the second opening longitudinal axis 15a of the second air supply opening and the circumferential wall normal 8a in the region of the second air supply opening 15 are at a second angle a2 to one another.
• this second angle a2 lies exclusively in a plane spanned by the normal to the wall of the circumference 8a and the circumferential direction.
• the second inlet surface 15b and the second outlet surface 15c partially overlap in projection along the normal 8a of the wall.
• the third air supply opening 16 is designed here with a third angle a3 of 0 °.
• the circumferential wall normal 8a ie the Vertical of the circumferential wall 8 in the area of the air supply opening and a third opening longitudinal axis 16a parallel to one another. If the air supply opening is of cylindrical design, the third inlet surface 16b and the third outlet surface 16c completely overlap in projection along the normal 8a of the peripheral wall.
• the fourth air supply opening 17 is formed at an angle here.
• the fourth opening longitudinal axis 17a of the fourth air supply opening 17b and the circumferential wall normal 8a in the area of the fourth air supply opening are at a fourth angle a4 to one another.
• this fourth angle a4 lies exclusively in a plane spanned by the normal to the wall 8a and the central axis.
• the fourth inlet surface 17b and the fourth outlet surface 17c partially overlap in projection along the normal 8a of the wall.
• first air supply openings 14 are arranged in a peripheral wall with a uniform thickness t of the wall.
• first air supply openings 14, second air supply openings 15 and third air supply openings 16 are periodically arranged.
• the periodicity here is A-B-C-A-B-C ....
• the angles a1, a2 and a3 should only lie in the plane shown in this figure.
• the first air supply opening 14 runs here perpendicular to the circumferential wall 8.
• circumferential wall normal 8a and first longitudinal opening axis 14a lie one above the other.
• the first exit surface 14c of the first air supply opening 14 is arranged on the inside of the peripheral wall and the first entry surface 14b is arranged on the outside of the peripheral wall 8.
• the first entry surface 14b and the first exit surface 14c completely overlap in projection along the normal to the wall of the circumference 8a.
• the second air supply opening 15 runs obliquely.
• circumferential wall normal 8a and second opening longitudinal axis 15a lie one above the other at a second angle a2 to one another.
• the second exit surface 15c of the second air supply opening 15 is arranged on the inside of the peripheral wall 8 and the second inlet surface 15b is arranged on the outside of the peripheral wall 8.
• the second entry surface 15b and the second exit surface 15c partially overlap in projection along the normal to the wall of the circumference 8a. An opening is thus present in the viewing direction along the normal 8a of the circumferential wall.
• the third air supply opening 16 runs obliquely.
• circumferential wall normal 8a and third longitudinal opening axis 16a lie one above the other at a third angle a3 to one another.
• the third exit surface 16c of the third air supply opening 16 is arranged on the inside of the peripheral wall 8 and the third inlet surface 16b is arranged on the outside of the peripheral wall 8.
• the third entry surface 16b and the third exit surface 16c partially overlap in projection along the normal to the wall of the circumference 8a. An opening is thus present in the viewing direction along the normal 8a of the circumferential wall.
• FIG. 4 shows an exemplary section through a row of air supply openings of an evaporator receiving body of an alternative embodiment.
• the air supply openings here have a periodicity of AB-ACABA ..., ie a first air supply opening 14 is followed by a second air supply opening 15. This is followed by a first air supply opening 14 followed by a third air supply opening 16.
• the first air supply opening has the angle al
• the second air supply opening has the angle a2
• the third air supply opening has the angle a3, with al not equal to a2 not equal to a3 here.
• FIG. 5 shows a detail of a section perpendicular to a row in which the air supply openings have an inclination component, ie in the plane spanned by the central axis and the normal to the circumference 8a.
• a first air supply opening 14 with a horizontal opening longitudinal axis 14a in a cylindrical region of the circumferential wall arranged parallel to the circumferential wall normal.
• a third air supply opening 16 is arranged, which has a longitudinal axis of the opening which in the plane of section forms the angle a3 to the circumferential wall normal 8a.
• Fig. 6 shows a detail of a section through an alternative embodiment perpendicular to a row in which the air supply openings have an inclination component, i.e. an angle in the plane spanned by the central axis and the circumferential normals 8a.
• a second air supply opening 15 is arranged in a cylindrical region of the circumferential wall, with an opening longitudinal axis 15a inclined to the circumferential wall normal 8a.
• a fourth air supply opening 17 is arranged, which has a horizontal opening longitudinal axis 17a, which forms the angle a4 to the circumferential wall normal 8a in the sectional plane.
• a peripheral wall with the air supply openings described above can also be arranged elsewhere in the burner, e.g. with a housing, as a separate component.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Spray-Type Burners (AREA)
• Air Supply (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=74183133

Family Applications (1)

Country Status (5)

Family Cites Families (6)

• 2020
  • 2020-01-10 DE DE102020100403.6A patent/DE102020100403B4/de active Active
• 2021
  • 2021-01-05 EP EP21700251.8A patent/EP4088062A1/de active Pending
  • 2021-01-05 US US17/791,792 patent/US20230036286A1/en active Pending
  • 2021-01-05 WO PCT/EP2021/050066 patent/WO2021140094A1/de unknown
  • 2021-01-05 CN CN202180008632.0A patent/CN114930081A/zh active Pending

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