EP0331969B1 - Anordnung zur Absenkung der Abgastemperatur bei Heizeinrichtungen - Google Patents

Anordnung zur Absenkung der Abgastemperatur bei Heizeinrichtungen Download PDF

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Publication number
EP0331969B1
EP0331969B1 EP89102983A EP89102983A EP0331969B1 EP 0331969 B1 EP0331969 B1 EP 0331969B1 EP 89102983 A EP89102983 A EP 89102983A EP 89102983 A EP89102983 A EP 89102983A EP 0331969 B1 EP0331969 B1 EP 0331969B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
exhaust gas
guide plate
arrangement
pipe
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.)
Expired - Lifetime
Application number
EP89102983A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0331969A3 (en
EP0331969A2 (de
Inventor
Fritz Mohring
Dieter Maisenbacher
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 EP0331969A2 publication Critical patent/EP0331969A2/de
Publication of EP0331969A3 publication Critical patent/EP0331969A3/de
Application granted granted Critical
Publication of EP0331969B1 publication Critical patent/EP0331969B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F24H9/00—Details
    • F24H9/0052—Details for air heaters
    • F24H9/0057—Guiding means
    • F24H9/0068—Guiding means in combustion gas channels
    • 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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/12—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically the surrounding tube being closed at one end, e.g. return type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0024—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for combustion apparatus, e.g. for boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/10—Secondary fins, e.g. projections or recesses on main fins

Definitions

  • the invention relates to an arrangement for lowering the exhaust gas temperature in heating devices with a combustion chamber, a combustion air blower, an electrical ignition device and a flame tube and a heat exchanger concentrically spaced around it with indirect heating surfaces (fins) and a nozzle for removing the combustion gases.
  • Such heaters are known for use in mobile units such as motor vehicles, ships or caravans and are used there to heat the vehicle interior.
  • the known heaters are operated with liquid fuel, preferably the fuel that is also used for combustion in the vehicle's engine.
  • the interior can either be heated using warm air that is blown directly into the room or indirectly using heated water. With the so-called water heaters, it is also possible to preheat the engine circuit.
  • Such a heater is described in detail in DE-OS 2139504.
  • a heating device is described which is provided with a die-cast piece, which forms in one piece the combustion chamber together with the heat exchanger provided on both sides with indirect heating surfaces (fins) and the exhaust gas connection, with a flame tube connected to the combustion chamber, which is provided in the fins Extends heat exchanger room.
  • This device is designed for heating fresh air and is used to heat the vehicle interior.
  • this heater has disadvantages with regard to exhaust gas routing.
  • the combustion gas emerging from the flame tube and redirected at the heat exchanger wall flows as exhaust gas to the exhaust pipe in the shortest way, and only a small proportion also flows through the annular space between the flame pipe and heat exchanger along the fins in the area opposite the exhaust pipe. This results in an unevenness in the temperature distribution and, due to the relatively small flow path of the exhaust gas, leads to an unnecessarily high exhaust gas temperature at the exhaust gas outlet.
  • the invention has for its object to provide an arrangement in a generic heating device in which a more uniform temperature distribution in the heat exchanger and thereby a reduction in the exhaust gas temperature and an increase in the efficiency of the heat exchanger is achieved.
  • This object is achieved according to the present invention in a generic heating device in that a baffle is arranged in the annular space between the flame tube and the heat exchanger in the flow path of the exhaust gas in front of the exhaust pipe in the area in which the exhaust pipe is molded onto the heat exchanger Covering the area between 45 ° and 180 ° of the annulus.
  • a baffle is arranged in the annular space between the flame tube and the heat exchanger in the flow path of the exhaust gas in front of the exhaust pipe in the area in which the exhaust pipe is molded onto the heat exchanger Covering the area between 45 ° and 180 ° of the annulus.
  • the baffle is arranged on the heat exchanger.
  • the baffle has an angle with which it is inserted into the heat exchanger and firmly connected to it.
  • the guide plate in which the ribs of the heat exchanger are guided up to the guide plate, the guide plate can also be attached directly to the ribs of the heat exchanger.
  • the baffle is a simple sheet metal part.
  • Another expedient embodiment is characterized in that the guide plate has one or more gas passage openings.
  • the guide plate can also be attached to the flame tube.
  • the flame tube together with the baffle plate is placed on the combustion chamber when assembling the heater.
  • the heater shown as an example corresponds to that from DE-OS 2139504. This is a heater for heating the interior of a motor vehicle with warm air.
  • the fuel is supplied via the spark plug connector 8, in which the ignition device 9 is also used.
  • the processed, ignitable mixture is ignited in the lateral prechamber 10 and burns in the combustion chamber 11, which is followed by a flame tube 12.
  • This flame tube 12 projects into the heat exchanger 13, which has indirect heating surfaces (fins) 14 on its outside and indirect heating surfaces (fins) 15 on its inside.
  • the exhaust gas is discharged through the exhaust pipe 16.
  • the fresh air sucked in through the fresh air inlet connection 3 flows through the heating device 1 and is heated with the indirect heating surfaces 15 when flowing through the annular space between the housing 2 and the heat exchanger 13 and leaves the heating device 1 as heating air via the heating air outlet connection 4.
  • the heating of the fresh air is carried out by the hot ones Combustion gases emerging from the flame tube 12, which is open at the end, and deflected on the wall of the heat exchanger 13 and flowing through the annular space 17 between the flame tube 12 and the heat exchanger 13 with the inner indirect heating surfaces 14.
  • the combustion gas takes the shortest and most resistance-free path from the flame tube outlet to the exhaust pipe 16, thereby preventing both a uniform flow in the heat exchanger 13 and a longer dwell time for heat transfer to the fresh air.
  • a guide plate 18 is arranged in the flow path of the exhaust gas in front of the exhaust pipe 16 in the annular space 17 between the flame tube 12 and the heat exchanger 13.
  • This baffle 18 covers at least a portion of the lower half of the annulus, preferably half of the annulus 17, so that the exhaust gas is forced to flow through the entire annulus 17 and to a certain extent flow out of the annulus half above the exhaust port 16.
  • the baffle 17 can be fastened to the heat exchanger 13 via a fastening leg 18, the inner indirect heating surfaces (ribs) 14 of which are of course shortened in this area.
  • the guide plate 17 can also be fastened directly to the ribs 14 without a fastening leg 18. Installation is very simple since the guide plate 17 is only inserted into the heat exchanger 13 and then fastened.
  • the baffle 17 can also have exhaust gas passage openings 20 in order to enable a part of the exhaust gas to flow directly to the exhaust gas connector 16. In this way, an optimization of the exhaust gas temperature reduction can be achieved in a simple manner by extending the residence time of the exhaust gas for heat transfer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Central Heating Systems (AREA)
EP89102983A 1988-03-11 1989-02-21 Anordnung zur Absenkung der Abgastemperatur bei Heizeinrichtungen Expired - Lifetime EP0331969B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808061A DE3808061A1 (de) 1988-03-11 1988-03-11 Anordnung zur absenkung der abgastemperatur bei heizeinrichtungen
DE3808061 1988-03-11

Publications (3)

Publication Number Publication Date
EP0331969A2 EP0331969A2 (de) 1989-09-13
EP0331969A3 EP0331969A3 (en) 1990-10-24
EP0331969B1 true EP0331969B1 (de) 1991-10-23

Family

ID=6349435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89102983A Expired - Lifetime EP0331969B1 (de) 1988-03-11 1989-02-21 Anordnung zur Absenkung der Abgastemperatur bei Heizeinrichtungen

Country Status (4)

Country Link
EP (1) EP0331969B1 (enrdf_load_stackoverflow)
CA (1) CA1336260C (enrdf_load_stackoverflow)
DE (2) DE3808061A1 (enrdf_load_stackoverflow)
ES (1) ES2027049T3 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4116692A1 (de) * 1991-05-22 1992-11-26 Kreis Truma Geraetebau Waermetauschereinsatz fuer luftheizgeraete
DE4208611C2 (de) * 1992-03-18 1995-05-18 Ruhrgas Ag Atmosphärischer Gasbrenner mit einem schachtförmigen, einen Luftstrom führenden Gehäuse
DE4327139A1 (de) * 1993-08-12 1995-02-16 Eberspaecher J Verfahren zur Verringerung der Geruchs- und Schadstoffemissionen bei Heizgeräten für Fahrzeuge und Anordnung zur Durchführung des Verfahrens
DE19516688C1 (de) * 1995-05-06 1996-09-05 Webasto Thermosysteme Gmbh Fahrzeugheizgerät mit einem Abgasstutzen und einem Prallblech
CA2916073C (en) 2014-12-22 2023-04-11 Mcs Italy S.P.A. Transportable air heater
CN108534135B (zh) * 2018-06-08 2024-06-04 中山劲牛科技有限公司 封堵头

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7147049U (de) * 1972-04-20 K Raunser Waermetechn Anlagen- Und Zentralheizungsbau Ölofen
DE2139504C3 (de) * 1971-08-06 1979-06-28 Fa. J. Eberspaecher, 7300 Esslingen Heizgerät für mobile Einheiten
DE3546368A1 (de) * 1985-12-31 1987-07-02 Siegfried Dipl Ing Weishaupt Heizkessel

Also Published As

Publication number Publication date
DE3808061A1 (de) 1989-09-21
EP0331969A3 (en) 1990-10-24
CA1336260C (en) 1995-07-11
DE58900389D1 (de) 1991-11-28
DE3808061C2 (enrdf_load_stackoverflow) 1990-07-19
ES2027049T3 (es) 1992-05-16
EP0331969A2 (de) 1989-09-13

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