Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating [HVAC] devices
  • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
  • B60H1/2203—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from burners
• • 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
  • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating [HVAC] devices
  • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
  • B60H2001/2268—Constructional features
  • B60H2001/2271—Heat exchangers, burners, ignition devices

Definitions

• the invention relates to a burner of a vehicle heating device, which has:
• the invention has for its object to design the burner in such a way that favorable ignition conditions result on the one hand and that on the other hand the glow plug is protected against impairments due to the conditions prevailing in the combustion chamber, in particular with regard to flame exposure and contamination.
• the burner is characterized according to the invention in that
• Lining is arranged, the recess space over a open transition communicates with the interior of the combustion chamber.
• the open transition between the recess space and the interior of the combustion chamber should be so large that the ignition of the fuel-air mixture can spread well into the interior of the combustion chamber.
• the open transition preferably has a cross-sectional area that is 0.5 to 10%, preferably 1 to 5%, of the area of the combustion chamber base.
• the lining preferably has a combustion chamber base lining part and an essentially cylindrical combustion chamber wall lining part adjoining it with an end face.
• a particularly favorable material for the combustion chamber floor lining part is metal web or metal mesh; a particularly favorable material for the combustion chamber wall lining part is ceramic.
• the recess space can be formed particularly cheaply in that the combustion chamber base lining part is not completely - disc-shaped, but in comparison has no lining material in a limited area of the disc. This material omission best starts from the edge of the combustion chamber floor lining part.
• the open transition - viewed in the axial direction of the combustion chamber end region - is essentially circular. This is the geometric relationships of the
• Combustion chamber end area is particularly well adapted and enables particularly simple production.
• a glow plug sometimes also called a rod candle, is preferably provided as the glow plug.
• glow plugs In contrast to the more conventional glow plugs, glow plugs have one more coated filament.
• the essentially cylindrical glow plug, rounded at its free end, is made of ceramic or metallic material. The glow plug quickly reaches high temperatures and is less sensitive. In addition, the power consumption per ignition process is lower.
• Vehicle heaters for which the burner according to the invention is intended are intended in particular for installation in passenger cars, trucks, ships, mobile homes, caravan trailers, bulldozers and the like.
• the heater can be integrated into the liquid circuit, which is usually provided for cooling the internal combustion engine and heating the interior of the vehicle.
• the vehicle heater can either be a so-called water heater, which emits the generated heat to a liquid circuit, or a so-called air heater, which emits the generated heat directly as a warm air flow.
• Petrol or diesel are primarily considered as fuels.
• the burner according to the invention can also be used as a heat generator for the thermal regeneration of particle filters, in particular in the exhaust line of diesel engines.
• the invention and refinements of the invention are explained in more detail below with reference to an exemplary embodiment shown in the drawing. It shows:
• Burner area of a vehicle heater Fig. 2 in cross section along II-II in Fig. 1 that area of the burner where the glow plug is positioned.
• FIG. 1 shows the burner area of a vehicle heating device which, as the most important components, has a combustion chamber 2 with a glow plug 4 and with a fuel supply device 6 to be described later, and a combustion air blower 8.
• the housing of the heater is not shown for reasons of clarity.
• the heater in Fig. 1 includes the right
• Combustion chamber 2 then a heat exchanger for transferring heat from the hot combustion gases to a liquid or air.
• the combustion air blower consists of an electric motor 10 and an impeller 12, which is shown schematically in FIG. 1.
• side channel blowers are often used, which have a fixed channel and a rotating impeller rotating at a short distance from it.
• the combustion chamber essentially consists of an end region 14 on the left in FIG. 1 and a main combustion region 16 adjoining on the right in FIG. 1. This is followed by a flame tube 18 to the right in FIG. 1, in which the combustion of the fuel ends .
• the end region 14 of the combustion chamber 2 has a cylindrical one
• Combustion chamber wall 20 and on the left in FIG. 1 a final combustion chamber floor 22 which, apart from a bulge to be described later, is essentially in the form of a circular disk.
• a connection piece 24 with an internal thread is provided at one point.
• the main combustion region 16 of the combustion chamber 2 is cylindrical and coaxial with the end region 14 described.
• the main combustion region 16 has a larger diameter than the end region 14.
• the wall of the main combustion region 16 has several circumferential rows of openings 26 axially one behind the other, through which the combustion air comes in from the outside flows into the main combustion area 16.
• the main combustion region 16 is closed off by a transverse flame diaphragm 28 which has a large passage opening 30 for the outflowing hot gas in the center.
• the combustion chamber arrangement is on a transverse wall by means of a funnel-shaped or a cylindrical component 32
• a cylindrical combustion chamber wall lining part 36 made of ceramic material is attached to the inside of the cylindrical combustion chamber wall 20 of the end region 14 of the combustion chamber 2.
• combustion chamber base lining part 38 which, apart from a material omission to be described further below, is in the form of a circular disk.
• the left end face in FIG. 1 of the combustion chamber wall lining part 36 bears against the combustion chamber floor lining part 38.
• Openings 40 are provided in the combustion chamber wall 20 and the combustion chamber wall lining part 36 so that combustion air can flow in.
• the combustion chamber floor lining part 38 consists of spun metal in the exemplary embodiment described.
• the glow plug 4 is positioned with its longitudinal axis in the tangential direction relative to the combustion chamber wall 20.
• the glow plug 4 could be arranged radially or be inclined at any angle between tangential and radial arrangement.
• the longitudinal axis of the glow plug 4 is perpendicular.
• the glow plug 4 could be arranged at another point on the combustion chamber wall 20, which can be illustrated by rotating the glow plug 4 about the longitudinal central axis of the combustion chamber 2.
• the glow plug 4 in the illustrated embodiment is arranged so that it sits exactly in front of the end face 42 of the combustion chamber wall lining part 36 .
• the glow plug 4 could be moved further to the right in FIG. 2, so that a small one
• the glow plug 4 could also be arranged a little further than shown to the left in FIG. 2, so that a certain distance between the inner circumference of the combustion chamber wall
• the glow region 44 has a small axial distance from the end face 42 of the
• the glow plug 4 is screwed into the socket 24.
• the glow plug 4 is connected to a control unit (not shown) via two current conductors, not shown, from where it receives power when ignition in the heater is required.
• the bulge 46 of the combustion chamber base 22 already mentioned above is designed such that the glow plug 4 can be accommodated in its intended position with respect to the right / left in FIG. 2 and with regard to the axial direction of the combustion chamber 2.
• the combustion chamber floor lining part 38 differs from the complete circular disk shape in that the material on the left and above is omitted from the boundary line 48 shown in FIG. 2, which runs like the legs of a right angle.
• a recess space 50 is thus formed which, overall, very roughly speaking, is cylindrical with vertical axes and is of sufficient size to accommodate the glow area 44 of the glow plug 4.
• the recess space 50 is axial bounded at the rear (left in FIG. 1) and on the outside (left in FIG. 2) by the bulge of the combustion chamber base 2; axially at the front (on the right in FIG. 1), the recess space 50 is delimited by the end face 42 of the combustion chamber wall lining part 36; On the inside (on the right in FIG. 2) and below, the recess space 50 is delimited by the boundary line 48 described further above.
• Axial direction, substantially circular section-shaped transition opening 52 is formed between the recess space 50 and the interior of the end region 14 of the combustion chamber 2.
• glow plug 4 is alternatively a
• Combustion chamber floor 22 has an opening which cannot be seen in the drawing.
• the attachment 6 is filled with metal web, which adjoins the metal web of the combustion chamber bottom lining part 38.
• a fuel line 54 opens into the interior of the attachment 6. A fuel pump (not shown) and the line 54 can thus do this
• Metal web of the combustion chamber bottom lining part 38 fuel is supplied from where the fuel into the interior of the end region
• combustion chamber wall lining part 36 for example porous ceramic or woven metal.
• fuel also enters the combustion chamber wall lining part 36 by capillary action, from where it enters the interior of the
• End region 14 of the combustion chamber 2 evaporates.
• a generally axially extending bore of relatively small diameter is provided, through which the combustion air required to ignite the glow area 44 of the glow plug 4 into the
• FIG. 1 Arrows in Fig. 1 indicate how the. Combustion air required by the fan 8 through the openings 40 in the end region 14 and through the openings 26 in the main combustion region 16 of the
• Combustion chamber flows and, like a small amount of combustion air, flows through the bore 56 described in the last paragraph into the recess space 50.
• transition opening 52 has a size that only makes up a small percentage of the area of the combustion chamber bottom 22 or the combustion chamber bottom lining part 38.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Wick-Type Burners And Burners With Porous Materials (AREA)
• Air-Conditioning For Vehicles (AREA)
• Evaporation-Type Combustion Burners (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=6496122

Family Applications (1)

Country Status (6)

Families Citing this family (21)

Family Cites Families (7)

• 1993
  • 1993-08-26 DE DE4328789A patent/DE4328789C2/de not_active Expired - Fee Related
• 1994
  • 1994-08-25 CN CN94192504.8A patent/CN1125477A/zh active Pending
  • 1994-08-25 WO PCT/EP1994/002812 patent/WO1995006223A1/de active IP Right Grant
  • 1994-08-25 CZ CZ953195A patent/CZ285670B6/cs not_active IP Right Cessation
  • 1994-08-25 US US08/564,334 patent/US5707227A/en not_active Expired - Fee Related
  • 1994-08-25 EP EP94926881A patent/EP0714493A1/de not_active Withdrawn

Non-Patent Citations (1)

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