EP1016824A2 - Préchauffeur pour un brûleur à pulvérisation de fuel sous pression - Google Patents

Préchauffeur pour un brûleur à pulvérisation de fuel sous pression Download PDF

Info

Publication number
EP1016824A2
EP1016824A2 EP99125978A EP99125978A EP1016824A2 EP 1016824 A2 EP1016824 A2 EP 1016824A2 EP 99125978 A EP99125978 A EP 99125978A EP 99125978 A EP99125978 A EP 99125978A EP 1016824 A2 EP1016824 A2 EP 1016824A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
sensor
preheater
heating
preheater according
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.)
Granted
Application number
EP99125978A
Other languages
German (de)
English (en)
Other versions
EP1016824A3 (fr
EP1016824B1 (fr
Inventor
Rafael Benavides
Werner DÖHLA
Julius Hudec
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.)
Suntec Industries France SA
Original Assignee
Rapa Rausch and Pausch Elektrotechnische Spezialfabrik GmbH
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 Rapa Rausch and Pausch Elektrotechnische Spezialfabrik GmbH filed Critical Rapa Rausch and Pausch Elektrotechnische Spezialfabrik GmbH
Publication of EP1016824A2 publication Critical patent/EP1016824A2/fr
Publication of EP1016824A3 publication Critical patent/EP1016824A3/fr
Application granted granted Critical
Publication of EP1016824B1 publication Critical patent/EP1016824B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F23D11/448—Vaporising devices incorporated with burners heated by electrical means

Definitions

  • the invention relates to a preheater for one Oil pressure atomizing burner according to the preamble of the claims.
  • Preheaters for oil pressure atomization burners are known, the one electronic control of the heating and preheating of the oil have a sensor in the form of a ball in contact with the preheater and at least with wire connections electronic partly installed on a circuit board Control arrangement is connected.
  • the disadvantage of this arrangement is that the wire connections difficult to install and easily undesirable are exposed to mechanical and thermal loads.
  • this object is achieved by the characterizing features of the first claim.
  • all components of the electronic control including the contacts of a release thermostat, can be integrated on the conductor foil, so that the cumbersome contacting of wire connections is eliminated.
  • the heater is usually designed as a heating wire that is wound around the preheater. This makes it possible to equip the flexible printed circuit board with the components by machine and to achieve a reduction in rejects and a higher quality of the oil pressure atomization burner compared to the prior art.
  • the area of the conductor foil in which the components of the electronic controller are contacted is not in contact with the heat exchanger. All components, including the PTC sensor, are applied to the conductor foil using SMD technology.
  • the flat PTC sensor is conveniently attached to the downstream end of the heat exchanger and enables a flat contact with the heat exchanger, so that an optimal thermal coupling between the two is possible. This is further supported by the fact that the sensor is arranged in a recess in the heat exchanger and thus closer to the heat-emitting region of the heat exchanger.
  • the flat sensor has a faster response time than a sensor which makes point contact with the heat exchanger according to the prior art, so that its response time is faster and the control behavior of the entire preheater is more precise.
  • the configuration of the sensor used is essentially important for the resistance-time characteristic distribution of oil preheaters. Because the flat sensor has a reproducible heat transfer with its surface, the behavior of the oil preheater is also relatively stable.
  • the heating element is advantageously a spirally wound heating wire, and the film is arranged between the heating wire and the heat exchanger in such a way that it is pressed against the heat exchanger by the heating wire. Electrically insulating layers are provided between the film and the heating winding and on the heating winding.
  • a preheater 10 is shown, the housing of which consists of a hollow cylindrical, tubular housing part 11 made of brass downstream, a sleeve-shaped housing part 12 also made of brass upstream and a box-shaped cover 13 made of a plastic for an opening 14 in the sleeve-shaped Housing part 12 is composed.
  • the housing part 11 is connected to the housing part 12 via a fit 16.
  • the cover 13 is releasably attached to the housing part 12 by means of resilient holding elements 17.
  • a heat exchanger 18 consisting of Al is arranged in the direction of a common geometric axis XX, which is supported with its front surface 19 against an annular shoulder 20 in the housing part 11 and by the action of a spring plate 21 which is supported against the housing part 12 against the Ring shoulder 20 is pressed.
  • the spring plate 21 also serves to compensate for existing tolerances.
  • the heat exchanger 18 has an axial bore 22 which has extensions 23 and 24 upstream and downstream.
  • connection piece 26, provided with a sealing ring 25, of a feed line 28 guided through a connecting piece 27 of the housing part 12 projects into the upstream extension 23.
  • a sintered body 29 as a surface multiplier.
  • On the upper part of the heat exchanger 18 in FIG. 1 there is a foil 33 provided with conductor tracks 32 (FIG. 3), which is surrounded by a heating coil (heating element) 34 which is placed around the heat exchanger 18 and which is opposed by insulation layers 35 and 36 the conductor tracks 32 and the room 15 is insulated.
  • the heating coil 34 presses the components located in it against the heat exchanger 18.
  • the wall of the heat exchanger 18 is thick enough to ensure a sufficiently uniform distribution of the heat given off by the heating coil 34.
  • the heat exchanger 18 has a recess 37, into which the film 33 is drawn with the corresponding end and at this end carries a PTC sensor 38, which does not contact the film 33 in a punctiform manner but over the entire surface, using SMD technology she is upset.
  • the arrangement and design of the sensor 38 enables it to be sufficiently close to the sintered body 29 through which oil flows, and thus ultimately to precisely regulate the oil temperature.
  • electronic components 40 of the temperature control electronics bridge resistors, diodes, thyristors, transistors, in a circuit known per se
  • the components 40 are electrically connected on the foil 33 via conductor tracks 41 to the sensor 38 and via conductor tracks 42 to the connections 43, 44 of the heating coil 34.
  • 33 are provided on the flexible circuit board 33 soldering 45 for a thermostat 46 which is attached to a surface 47 of the heat exchanger 18.
  • the film 39 is provided with recesses 48, with which it is placed on holding lugs 49 and is soldered to them.
  • the holding lugs 49 are parts of contact pins 50 suitably held in the cover 13 for supplying power to the preheater 10. Before the heating current can flow, the oil supplied through the supply line 28 must have a sufficiently high starting temperature.
  • thermostat 41 release the electronic temperature control based on the sensor measurements and thus the function of the oil pressure atomizing burner, which is not shown in the rest.
  • the preheater 10 ensures that the outlet temperature of the oil at its end in the flow direction is at least almost constant regardless of the flow rate (1-8 kg / h).
  • the invention is not applicable to certain materials of the housing parts 11, 12, 13 and the heat exchanger 18 to a certain one Embodiment of the area multiplier 29 bound.
  • the latter also from a system of adjacent tubes or bullets exist if only the purpose of achieving a good one Heat transfer is maintained.
  • the electrical Heating element not as a spiral 34, but can also, for example, in the form of Be designed bars.
  • the sensor does not have to be a PTC sensor. Also it is not necessary to control electronics or all components 40 of the Control electronics on the film or flexible circuit board 33 to install.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Regulation And Control Of Combustion (AREA)
EP99125978A 1998-12-28 1999-12-28 Préchauffeur pour un brûleur à pulvérisation de fuel sous pression Expired - Lifetime EP1016824B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19860900 1998-12-28
DE19860900 1998-12-28

Publications (3)

Publication Number Publication Date
EP1016824A2 true EP1016824A2 (fr) 2000-07-05
EP1016824A3 EP1016824A3 (fr) 2000-10-11
EP1016824B1 EP1016824B1 (fr) 2003-04-02

Family

ID=7893224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99125978A Expired - Lifetime EP1016824B1 (fr) 1998-12-28 1999-12-28 Préchauffeur pour un brûleur à pulvérisation de fuel sous pression

Country Status (2)

Country Link
EP (1) EP1016824B1 (fr)
DE (1) DE59904837D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2366629A (en) * 2000-09-11 2002-03-13 Bookham Technology Plc Methods and apparatus for temperature control
FR2902862A1 (fr) * 2006-06-21 2007-12-28 Noel Castaing Dispositif pour alimenter en huiles vegetales, graisses fluides les bruleurs - moteurs diesel a la place du fioul- (gazole)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4215995A1 (de) * 1992-05-12 1993-11-18 Rausch & Pausch Düsenstock für Öldruckzerstäubungsbrenner
WO1994004872A1 (fr) * 1992-08-17 1994-03-03 Rapa Rausch & Pausch Elektrotechnische Spezialfabrik Gmbh Raccord de gicleur pour bruleur a mazout
EP0814302A1 (fr) * 1996-06-11 1997-12-29 Suntec Industries France (Sa) Réchauffeur de mazout auto-régulé

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4215995A1 (de) * 1992-05-12 1993-11-18 Rausch & Pausch Düsenstock für Öldruckzerstäubungsbrenner
WO1994004872A1 (fr) * 1992-08-17 1994-03-03 Rapa Rausch & Pausch Elektrotechnische Spezialfabrik Gmbh Raccord de gicleur pour bruleur a mazout
EP0814302A1 (fr) * 1996-06-11 1997-12-29 Suntec Industries France (Sa) Réchauffeur de mazout auto-régulé

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2366629A (en) * 2000-09-11 2002-03-13 Bookham Technology Plc Methods and apparatus for temperature control
FR2902862A1 (fr) * 2006-06-21 2007-12-28 Noel Castaing Dispositif pour alimenter en huiles vegetales, graisses fluides les bruleurs - moteurs diesel a la place du fioul- (gazole)

Also Published As

Publication number Publication date
EP1016824A3 (fr) 2000-10-11
DE59904837D1 (de) 2003-05-08
EP1016824B1 (fr) 2003-04-02

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