EP1681519A2 - Echangeur de chaleur et appareil de chauffage pour véhicules avec un tel échangeur de chaleur - Google Patents

Echangeur de chaleur et appareil de chauffage pour véhicules avec un tel échangeur de chaleur Download PDF

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Publication number
EP1681519A2
EP1681519A2 EP06000649A EP06000649A EP1681519A2 EP 1681519 A2 EP1681519 A2 EP 1681519A2 EP 06000649 A EP06000649 A EP 06000649A EP 06000649 A EP06000649 A EP 06000649A EP 1681519 A2 EP1681519 A2 EP 1681519A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
exchanger body
peripheral wall
region
heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06000649A
Other languages
German (de)
English (en)
Other versions
EP1681519A3 (fr
Inventor
Michael Haefner
Andreas Collmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP1681519A2 publication Critical patent/EP1681519A2/fr
Publication of EP1681519A3 publication Critical patent/EP1681519A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/065—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/263—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body with a dry-wall combustion chamber

Definitions

  • the present invention relates to a heat exchanger body for a vehicle heater or a vehicle heater with such a heat exchanger body, wherein the heat exchanger body has an elongated peripheral wall which limits with its inner side a flow space for combustion products.
  • Such a heat exchanger body or a vehicle heater with such a heat exchanger body is known from DE 102 11 591 A1.
  • the heat exchanger body is formed with its peripheral wall while substantially pot-shaped and carries in its open end region of the burner assembly in which hot combustion products are formed during combustion.
  • These hot combustion products after having passed through a comparatively short flame tube, enter into an inlet region, close to the open end region of the heat exchanger body, of a flow space provided in this heat exchanger body.
  • heat transfer fins leading to an exit region are provided on the inside of the peripheral wall. The height and thus also the surface of these heat transfer ribs increases in the direction from the inlet area to the outlet area.
  • the exit region is formed near the bottom of the heat exchanger body adjoining the circumferential wall in the form of a lateral opening.
  • a heat exchanger body for a vehicle heater comprising an elongated peripheral wall which defines an inside of a combustion chamber flow space, wherein in a first longitudinal portion of the flow space leading away from an inlet region, the peripheral wall substantially not is provided with heat transfer ribs and in a leading to an exit region second longitudinal portion, the peripheral wall is provided on its inside with heat transfer ribs.
  • the heat exchanger body is configured in a first longitudinal section of the flow space with a substantially restructured, that is not provided with ribbed, surface.
  • the combustion products flow through this flow space region, in which, based on a unit length of the peripheral wall in the direction of its longitudinal extent, this provides a comparatively small heat transfer surface.
  • heat transfer ribs are provided, which lead to a significant increase in the heat transfer surface provided per unit length of the peripheral wall.
  • the already cooled combustion products thus come into contact with a larger surface area, which means that a larger amount of energy can be transferred to the heat exchanger body even in these later and thus through cooler combustion products flow areas.
  • the energy input into the heat exchanger body over its length is significantly more uniform.
  • the peripheral wall is widened stepwise at least on the inner side.
  • the heat transfer fins extend away from the transition region such that a vertex of at least a portion of the heat transfer fins is substantially continuous with the inner surface of the peripheral wall in the first length segment. It can further be provided that an inner dimension of the peripheral wall increases in the direction of the exit area.
  • the manufacturability in a casting process can be further facilitated by the fact that the apex regions of the heat transfer ribs extend away from one another in the direction of the exit region. In this way, not only in the region of the peripheral wall, but also in the region of the vertexes of the heat transfer ribs, the demolding slope which is generally required or advantageous when metal casting processes are carried out can be provided.
  • heat transfer ribs for transmitting heat to a medium to be heated be provided on an outer side of the circumferential wall.
  • a vehicle heater comprising a burner assembly with a combustion products in the direction of a combustion chamber leading away flame tube, a heat exchanger body according to the invention, wherein the flame tube extends into the heat exchanger body and limits the same along with the peripheral wall of the flow space Further, wherein the flame tube, the combustion products leads towards the inlet region of the flow space.
  • the flow space for the combustion products on the one hand by the peripheral wall,
  • the heat exchanger body itself and on the other hand limited by the combustion products leading flame tube.
  • the combustion products which have already introduced heat into the heat exchanger body when flowing through the flow space, can also absorb heat from the flame tube, which flows around the inside of the very hot combustion products, through the flow along the flame tube, and thus also into the outlet region Sections of the flow space have a sufficiently high temperature to promote a uniform heat introduction into the heat exchanger body over its length.
  • the flame tube near the transition region has a step-like change in its dimension.
  • the flame tube has at least one intermediate outlet opening for products of combustion toward the flow space in its region bounding the second longitudinal section of the flow space.
  • a vehicle heater according to the invention is generally designated 10.
  • a vehicle heater 10 may be used to heat the air to be introduced into a vehicle interior.
  • it has a generally designated 12 heat exchanger body, which, as described below, absorbs combustion heat and transmits it to the umströmente air.
  • the vehicle heater 10 as a further essential system area a burner assembly 14.
  • a combustion chamber housing 16 a combustion chamber 18, in which fuel is introduced via a Brennstoffzumoltechnisch and possibly a porous evaporator medium and via a Heileinleitstutzen 20, the required combustion air is further initiated.
  • ignition device By not further illustrated ignition device, the mixture of fuel and combustion air can be ignited.
  • the hot combustion products leave the combustion chamber 18 and the combustion chamber housing 16 and enter through a flame cover 22 in a generally designated 24 flame tube.
  • This is fixedly connected to the combustion chamber housing 16 and is elongated along a Lekssache L.
  • the combustion chamber housing 16 is generally provided as a cast component, the flame tube 24 may be made of sheet metal material, for example.
  • the flame tube 24 and the heat exchanger body 12 is elongated in the direction of the longitudinal axis L or has an elongated circumferential wall 26 in this direction.
  • the heat exchanger body 12 is substantially pot-shaped and, in addition to the circumferential wall 26, also has a bottom wall 28, which adjoins the circumferential wall 26 directly.
  • an overall arrangement is created by the peripheral wall 26 and bottom wall 28, which is open in one end region and there via a connecting lug 30, the combustion chamber housing 16 carries, but which is completely completed in the other end, so that there are no combustion exhaust gases can.
  • the flame tube 24 extends, thus leading the combustion products from the open end 32 of the heat exchanger body 12 in the direction and close to the closed end 34 thereof.
  • a flow space generally designated 40 is formed between an outer side 36 of the flame tube 24 and an inner side 38 of the peripheral wall 26 and the bottom wall 28, a flow space generally designated 40 is formed.
  • An entry region 44 for this flow space 40 is thus formed at the axial end 42 of the flame tube 24 remote from the combustion chamber 18, in which the hot combustion products initially conducted along the flame tube 24 and at the end 42 of the same extend outwardly from the heat exchanger body 12 limited flow space 40 occur.
  • the flowing combustion products are also essentially deflected by the bottom wall 28, so that they now flow back along the outside 36 of the flame tube 24 or the inside 38 of the peripheral wall 26 in the direction of the open end 32 of the heat exchanger body 12.
  • a first longitudinal section 50 includes, for example, the inlet region 44 and leads away from it.
  • the heat exchanger body 12 or the circumferential wall 26 thereof is provided with a substantially smooth, unstructured surface. This means that on the inner side 38 in this first longitudinal section 50, no elevations or depressions substantially influencing the provided surface are formed.
  • a second longitudinal section 52 which adjoins the first longitudinal section 50 in a transitional area 54, the inner side 38 of the circumferential wall 26 is formed with heat transfer ribs 56 extending approximately in the direction of flow, ie in the direction of the outlet area 48.
  • the heat transfer ribs 56 enlarge the surface of the peripheral wall 26 or of the heat exchanger body 12 made available for heat absorption relative to a respective length unit thereof in the direction of the longitudinal axis L in comparison to a surface that is not substantially structured with such ribs, as in the first embodiment Length section 50 is provided.
  • transition region 54 between the two longitudinal sections 50, 52 is designed stepwise, so that at least on the inner side 38, the dimension of the peripheral wall or the inner diameter of the thus provided volume increases in steps.
  • the apex regions 58 of the heat transfer ribs 56 are designed so that they flush with the inner side 38 of the peripheral wall 26 in the firstConnectnabschitt 50, so continue this essentially without step-like transition.
  • the apex regions 58 also diverge in the direction of the exit region 48, ie also diverge according to the widening shape of the circumferential wall 26, so that, for example, with respect to the longitudinal axis L diametrically opposite or approximately opposite heat transfer ribs 56 of the mutual Distance thereof increases in their apex areas 58 in the direction of the exit region 48 out.
  • the demolding slope which is advantageous or required, in particular, when the heat exchanger body 12 is produced in a metal casting process.
  • the flame tube 24 in a transition region 60th provided with a dimensional change, so in that it is designed to taper in the direction of its end 42 remote from the combustion chamber 18, or is widening in the direction in which the combustion products flow in the flow space 40.
  • a further step-like transition 62 is then provided near the connection of the flame tube 24 to the heat exchanger housing 26.
  • FIG. 3 Another embodiment of the heater according to the invention is shown in Fig. 3.
  • the construction basically corresponds to that described above with reference to FIGS. 1 and 2, so that reference may be made to these explanations. It can be seen, however, that two ring rows of intermediate outlet openings 64 are provided in the flame tube 24 in its section delimiting the second longitudinal section 52 of the flow space 40 together with the circumferential wall 26 of the heat exchanger body 12. Through these intermediate outlet openings 64, a portion of the combustion products flowing in the direction of the combustion chamber 18 in the flame tube 24 from the flame tube 24 can enter directly into the second longitudinal section 52 of the flow space 40.
  • the number of intermediate outlet openings 64, the size and their positioning on the flame tube 24 can be selected so that by appropriate staggering of these intermediate outlet openings 64, a further optimization can be obtained.
  • the opening cross section thereof or the total cross section of the intermediate outlet openings 64 provided in a respective longitudinal region of the flame tube 24 can decrease in the direction of the end 42.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
EP06000649A 2005-01-13 2006-01-12 Echangeur de chaleur et appareil de chauffage pour véhicules avec un tel échangeur de chaleur Withdrawn EP1681519A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005001662A DE102005001662A1 (de) 2005-01-13 2005-01-13 Wärmetauscherkörper und Fahrzeugheizgerät mit einem Wärmetauscherkörper

Publications (2)

Publication Number Publication Date
EP1681519A2 true EP1681519A2 (fr) 2006-07-19
EP1681519A3 EP1681519A3 (fr) 2008-12-31

Family

ID=36193756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06000649A Withdrawn EP1681519A3 (fr) 2005-01-13 2006-01-12 Echangeur de chaleur et appareil de chauffage pour véhicules avec un tel échangeur de chaleur

Country Status (3)

Country Link
US (1) US20060151623A1 (fr)
EP (1) EP1681519A3 (fr)
DE (1) DE102005001662A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020006264A1 (de) 2020-10-12 2022-04-14 Truma Gerätetechnik GmbH & Co. KG Vorrichtung zum Erwärmen eines Mediums

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005053514A1 (de) * 2004-11-26 2006-07-06 Webasto Ag Luftheizgerät für ein Kraftfahrzeug
DE102011079018A1 (de) 2011-07-12 2013-01-17 J. Eberspächer GmbH & Co. KG Fahrzeugheizgerät
DE102012220792A1 (de) * 2012-11-14 2014-05-15 Eberspächer Climate Control Systems GmbH & Co. KG Wärmetauscheranordnung, insbesondere für ein Fahrzeugheizgerät
US9296275B2 (en) * 2013-01-04 2016-03-29 Denso International America, Inc. Multi-function infrared heating device
DE102016117408B4 (de) * 2016-09-15 2020-11-26 Eberspächer Climate Control Systems GmbH Brennkammerbaugruppe für ein brennstoffbetriebenes Fahrzeugheizgerät
DE102017125783B4 (de) * 2017-11-06 2019-09-05 Eberspächer Climate Control Systems GmbH & Co. KG Fahrzeugheizgerät
DE102018117213A1 (de) * 2018-07-17 2020-01-23 Eberspächer Climate Control Systems GmbH & Co. KG Fahrzeugheizgerät

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE10211591A1 (de) 2002-03-15 2003-10-02 Eberspaecher J Gmbh & Co Luftheizgerät zur Integration in eine luftführende Gehäuseanordnung

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Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE10211591A1 (de) 2002-03-15 2003-10-02 Eberspaecher J Gmbh & Co Luftheizgerät zur Integration in eine luftführende Gehäuseanordnung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020006264A1 (de) 2020-10-12 2022-04-14 Truma Gerätetechnik GmbH & Co. KG Vorrichtung zum Erwärmen eines Mediums
WO2022078619A1 (fr) 2020-10-12 2022-04-21 Truma Gerätetechnik GmbH & Co. KG Dispositif destiné à chauffer un milieu

Also Published As

Publication number Publication date
EP1681519A3 (fr) 2008-12-31
US20060151623A1 (en) 2006-07-13
DE102005001662A1 (de) 2006-07-27

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