WO2008106971A1 - Système de préchauffage à mazout - Google Patents

Système de préchauffage à mazout Download PDF

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Publication number
WO2008106971A1
WO2008106971A1 PCT/DK2008/000088 DK2008000088W WO2008106971A1 WO 2008106971 A1 WO2008106971 A1 WO 2008106971A1 DK 2008000088 W DK2008000088 W DK 2008000088W WO 2008106971 A1 WO2008106971 A1 WO 2008106971A1
Authority
WO
WIPO (PCT)
Prior art keywords
heizölvorwärmer
oil
heating
boundary wall
oil passage
Prior art date
Application number
PCT/DK2008/000088
Other languages
German (de)
English (en)
Inventor
Bent Kjeldal
Finn Ulf Schmidt
Original Assignee
Danfoss A/S
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 Danfoss A/S filed Critical Danfoss A/S
Publication of WO2008106971A1 publication Critical patent/WO2008106971A1/fr

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/20—Preheating devices

Definitions

  • the invention relates to a Walkerölvoriser with at least one heating element, which has a heating surface, and at least one ölkanalge- housing having at least one oil passage with a first boundary wall, the outside of which abuts the heating surface.
  • the oil passage housing has an oil passage, are arranged in the heat conducting body. These heat-conducting body can have different shapes. Proposed are a good heat-conducting porous material or a separately formed shaped body made of sintered bronze.
  • US 4,447,706 shows an oil preheater in which the oil passage housing is formed by a Flachkantrohr. Alternatively, you can also cut out flat channels in a plastic or provide tightly adjacent holes in a plastic.
  • DE 2422 216 A1 shows a nozzle rod for an oil burner, in which the heating is performed by heating elements which extend axially to an oil feed pipe.
  • heating elements which extend axially to an oil feed pipe.
  • heating elements that are wound around the oil feed tube. These heating elements are cast in a heat storage aluminum.
  • DE 198 59 014 A1 shows an oil preheater, which is composed of a plurality of elements, namely a tube, an outer varnishvertei- management element and an inner heat distribution element, wherein a heating resistor is in heat-conducting connection with the outer heat distribution element.
  • Heating oil preheaters are used to raise the fuel oil supplied to an oil burner to an elevated temperature. This increased temperature reduces the viscosity of the heating oil and facilitates its atomization. The better the fuel oil is atomized, the lower the environmental impact of burning the heating oil.
  • the invention has for its object to realize a Schufflevoriser with a simple structure.
  • the oil passage housing is formed at least in a region in which the heating element on the oil passage housing, as an aluminum profile having at least one protruding from the boundary wall in the heat-conducting wall.
  • the aluminum profile has two tasks. It surrounds the oil channel. Heat can then be transferred to the heating oil through the boundary wall of the oil channel. The heat transfer is further improved by the fact that protrudes from the boundary wall, the heat conducting wall inwards into the oil passage. Since the oil passage housing is formed overall as an aluminum profile, the heat conducting wall is integrally connected to the boundary wall, so that a heat flow from the heating element to the boundary wall and of There is possible on the politiciansleitwand without major losses. This makes it possible to make the free cross section, through which the fuel oil can flow, a little larger. This reduces the risk that the heating oil preheater gets clogged.
  • the heat-conducting wall connects the first boundary wall with a second boundary wall, which lies opposite the first boundary wall.
  • the nickelleitwand then has a second function. It not only serves to transfer heat to the fuel oil that flows along the heat-conducting wall.
  • the skilletleitwand also serves the mechanical support of the second boundary wall with respect to the first boundary wall, so that for example on the second
  • Limiting wall can apply a force with which the oil channel housing is pressed against the heating element and the greater this force, the better the heat transfer between the heating element and the oil channel housing in general. This force can then be applied for example by a spring.
  • the heat conducting wall divides the oil channel into several channels.
  • a plurality of planteleitense from the first boundary wall and a mean distance between the politiciansleitSTn is provided which is smaller than a mean extent of the varnishleitprocess of the first boundary wall away.
  • a mean distance between the politiciansleitclassn is provided which is smaller than a mean extent of the varnishleitprocess of the first boundary wall away.
  • the distances between the politiciansleitclassn are not absolutely necessary.
  • a mean distance is formed by dividing the sum of the distances by the number of distances. In the same way, it is generally advantageous if the politiciansleitprocess the same "height", ie extension away from the first boundary wall, have. But this is not mandatory.
  • a mean extension is formed from the sum of the extensions of all the heat-conducting walls divided by the number of heat-conducting walls. If one now chooses the average extent greater than the average distance between the skilletleit paragraphn, then there is a relatively large heat transfer surface for the fuel oil at a rela-5 tively small layer thickness of the fuel oil. Thus, a good heating of the fuel oil can be achieved even if the Schwarzvor Anlagenr has only a limited length in the flow direction of the fuel oil.
  • the average extension of the heat-conducting walls of o of the first boundary wall is preferably 3 to 4 times the mean distance. This results in a flow path for the heating oil between two bathleit paragraphn, which has a rectangular cross section in principle.
  • the rectangle formed by the cross-section has a broad side which is about 3 to 4 times the height of the rectangle. This allows a satisfactory heat transfer.
  • the heat conducting walls have an average thickness which is in the range of 0.5 to 1, 2 times the average distance.
  • the heat conducting walls need not have the same thickness, although this is advantageous.
  • the average thickness is then calculated from the sum of the thicknesses divided by the number of heat conducting walls.
  • the thickness is the extension of a sautwand parallel to the first boundary wall.
  • At least one heat-conducting wall limits a section of the oil passage that is essentially triangular in cross-section.
  • a "triangle" for the section of the oil channel is achieved even then a good heat transfer and thus a satisfactory temperature for the fuel oil when spatially unfavorable conditions.
  • the oil passage housing has at least one end portion into which the aluminum profile is inserted.
  • the end portion has the task to connect the oil passage housing with a supply or discharge for the fuel oil.
  • the end section has the task of distributing the heating oil as evenly as possible over the cross section of the oil channel housing.
  • the end section has a plug-in space with an end face provided with an opening, into which the aluminum section profile is inserted with a distance to the front side.
  • the insertion space then forms the connection between the opening and the oil channel housing.
  • the fuel oil which enters the insertion space through the opening can then spread over the cross section of the oil passage housing and thus flow through the oil channel housing with the corresponding distribution.
  • the fuel oil is then collected in the insertion space before it can flow through the opening in the end face.
  • the end portion is formed of cold pressed aluminum.
  • the use of aluminum for the end section has the advantage that at least substantially the same coefficient of thermal expansion is obtained for the end section and the oil channel housing. Even with temperature changes that result in operation, thermal stresses are then avoided or at least kept small.
  • Aluminum can be brought into the desired shape by means of cold pressing without the need for complex metal-cutting shapes. By cold pressing the end section also gets a sufficient mechanical strength.
  • the aluminum profile and the end portion are soldered, welded or glued together. This can be omitted a seal between the aluminum profile and the end portion. The tightness is rather generated by the connection between the aluminum profile and the end portion.
  • the outside is at least partially flat. This makes it easier to bring the heating element and the oil channel housing to each other to the plant.
  • the outside is at least partially curved. This is especially advantageous if the Outside and the heating element with their shapes are adapted to each other, so that here too a flat contact can be made. By contrast, a curvature ensures that the heating element can be displaced laterally relative to the oil channel housing.
  • the outer side at least partially has a circular curvature.
  • a circular, more precisely a cylindrical curvature can be easily produced with the required accuracy.
  • the outside has a concave curvature.
  • the heating element can be inserted.
  • the heating element can then, for example, have a cylindrical shape, the radius of the cylinder matching the radius of the curvature.
  • the Schuziervormaschiner on two aluminum profiles, between which the heating element is arranged. You can then press the two aluminum profiles against each other, for example by means of a spring, so that both aluminum profiles are pressed against the heating element.
  • FIG. 3 shows the heating oil preheater in a partially cut-away perspective view
  • FIG. 4 shows a modified embodiment of a Schuetzvormaschiners.
  • Wienölvor Anlagenr 1 has a heating element 2, which may be formed for example as a PTC element.
  • the heating element 2 is supplied with electrical energy via connecting lines 3, 4. Since it changes its electrical resistance with temperature, the heating element 2 acts largely self-regulating, ie it can be kept at a certain temperature.
  • each oil channel housing 5 is designed as an aluminum profile, which can be produced for example by extrusion.
  • the oil channel housing 5 are then soldered, glued or welded to the end sections 6.
  • the end sections 6 can ensure that the two oil channel housings 5 are pressed against the heating element 2 with sufficient force. If this is not the case, then you can use a non-illustrated bracket to press the two oil channel housing 5 against the heating element 2.
  • Both oil channel housing 5 are formed the same, so that only one will be described below.
  • Each oil channel housing has a first boundary wall 7 and a second boundary wall 8.
  • the outside of the first boundary wall 7 abuts against the heating element 2, wherein the surface on which the oil channel housing 5 bears against the heating element 2 is referred to as the heating surface 9.
  • the heating oil preheater 1 has two oil channel housing 5, then the heating element 2 accordingly has two heating surfaces.
  • the heat-conducting walls 10 connect the first boundary wall 7 with the second boundary wall 8. Accordingly, forces exerted on the second boundary wall 8 are transmitted through the heat-conducting walls 10 to the first boundary wall 7.
  • the skilletleitance 10 all have approximately the same distance a from each other. If the distances a are not equal, then, for the purposes of the following explanation, one may consider a mean distance that results from the sum of the distances a divided by the number of distances a.
  • the heat-conducting walls 10 have a thickness d.
  • the thicknesses d of the slaughterleitrind 10 are also the same. If this is not the case, then an average thickness is considered that results from the sum of the thicknesses d of the heat-conducting walls 10 divided by the number of heat-conducting walls 10.
  • a favorable dimensioning results when the average distance a between the heat-conducting walls 10 is smaller than the average extent e of the heat-conducting walls 10, 10 'of the first boundary wall. This results in rectangular channels 11, in which the "broadside” is available for heat transfer from the oil channel housing to the fuel oil flowing through. At the same time, the "layer thickness" of the heating oil, which must be penetrated by the heat, kept small.
  • the mean extension should be 3 to 4 times the mean distance a.
  • the heat conducting walls 10 preferably have an average thickness d which is in the range 0.5 to 1.2 times the mean distance a.
  • the thickness d of the tillleitance 10, 10 ' is chosen so that on the one hand, a sufficiently large cross section for the heat conduction available, on the other hand, not too much material is used. It is in a given volume enough flow area for the flowing fuel oil available.
  • each oil passage housing 5 The two outer channels 11 * in each oil passage housing 5 are substantially triangular shape. Each oil channel housing then has an approximately trapezoidal cross-section. This makes it easier to accommodate the Schuölvormaschiner- mer 1 in a cylindrical envelope, which is often desired.
  • the end portion 6 has an opening 12 which is arranged in an end face 13. Through the opening 12 in an end portion 6 fuel oil can flow. Through the opening 12 in the other end portion 6, the heated fuel oil can flow.
  • the end portion 6 has for both oil passage housing 5 each have a plug-in space 14 into which the respective oil passage housing 5 can be easily inserted. A tight connection results from the above-mentioned soldering, gluing or welding.
  • Fig. 4 shows a modified embodiment. While in the embodiment according to FIGS. 1 to 3, the heating element 2 has a cuboid shape, the heating element 2 in the embodiment according to FIG. 4 has a cylindrical shape. Accordingly, the heating surface 9 is circular in cross-section and convex.
  • the oil channel housing 5 has a first boundary wall 7, which is concave with the same radius. In this case, the banksleitmony 10 extend substantially in the radial direction.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un système de préchauffage à mazout (1) comportant au moins un élément de chauffage (2) présentant une surface de chauffage (9), et au moins un boîtier de canal à mazout (5) présentant au moins un canal à mazout (11) pourvu d'une première paroi de délimitation dont le côté extérieur est adjacent à la surface de chauffage (9). L'invention vise à mettre en oeuvre un tel système de préchauffage à mazout de construction simple. A cet effet, le boîtier de canal à mazout (5) est conçu en tant que profilé en aluminium au moins dans une zone dans laquelle l'élément de chauffage (2) est adjacent au boîtier de canal à mazout (5), le profilé présentant à l'intérieur au moins une paroi thermoconductrice (10) faisant saillie par rapport à la paroi de délimitation (7).
PCT/DK2008/000088 2007-03-05 2008-03-03 Système de préchauffage à mazout WO2008106971A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007010958.1 2007-03-05
DE102007010958A DE102007010958A1 (de) 2007-03-05 2007-03-05 Heizölvorwärmer

Publications (1)

Publication Number Publication Date
WO2008106971A1 true WO2008106971A1 (fr) 2008-09-12

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Application Number Title Priority Date Filing Date
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DE (1) DE102007010958A1 (fr)
WO (1) WO2008106971A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015137817A1 (fr) * 2014-03-13 2015-09-17 Defa As Dispositif chauffant pour fluide
US9377090B2 (en) 2008-10-02 2016-06-28 Litens Automotive Partnership Compact tensioner with sustainable damping

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018127202B4 (de) * 2018-10-31 2020-10-15 Hidria, d.o.o. PTC-Heizung und System

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018554A2 (fr) * 1979-04-26 1980-11-12 Siemens Aktiengesellschaft Dispositif de préchauffage de mazout
DE4216008A1 (de) * 1992-05-12 1993-11-18 Rausch & Pausch Vorwärmer für Ölbrenner
US5879149A (en) * 1996-09-09 1999-03-09 Black Gold Corporation Fuel control and preheating system for a fuel-burning heater
DE10024306A1 (de) * 1999-06-18 2001-07-19 Tuerk & Hillinger Gmbh Durchlauferhitzer mit PTC-Heizelementen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7811098U1 (de) * 1978-08-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Heizer mit f erroelektrischem Keramik-Heizelement
DE2422216A1 (de) 1974-05-08 1975-11-20 Elco Oelbrennerwerk Ag Duesenstange fuer oelbrenner
EP0017057B1 (fr) 1979-03-27 1982-03-10 Danfoss A/S Dispositif pour le préchauffage du mazout
GB2076270B (en) * 1980-05-14 1984-08-30 Matsushita Electric Ind Co Ltd Electrical air-heating device
DE3571869D1 (en) * 1985-04-09 1989-08-31 Hengst Walter Gmbh & Co Kg Oil cooler
US5370178A (en) * 1993-08-25 1994-12-06 International Business Machines Corporation Convertible cooling module for air or water cooling of electronic circuit components
US5551868A (en) * 1994-04-14 1996-09-03 Clean Burn, Inc. Preheater block for multi oil furnaces
DE19859014A1 (de) 1998-01-09 1999-07-15 Danfoss As Ölvorwärmer
DE10044320B4 (de) * 2000-09-07 2008-04-10 Danfoss A/S Heizölvorwärmer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018554A2 (fr) * 1979-04-26 1980-11-12 Siemens Aktiengesellschaft Dispositif de préchauffage de mazout
DE4216008A1 (de) * 1992-05-12 1993-11-18 Rausch & Pausch Vorwärmer für Ölbrenner
US5879149A (en) * 1996-09-09 1999-03-09 Black Gold Corporation Fuel control and preheating system for a fuel-burning heater
DE10024306A1 (de) * 1999-06-18 2001-07-19 Tuerk & Hillinger Gmbh Durchlauferhitzer mit PTC-Heizelementen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9377090B2 (en) 2008-10-02 2016-06-28 Litens Automotive Partnership Compact tensioner with sustainable damping
WO2015137817A1 (fr) * 2014-03-13 2015-09-17 Defa As Dispositif chauffant pour fluide
US20170016421A1 (en) 2014-03-13 2017-01-19 Defa As Heating device for fluid
US10174737B2 (en) 2014-03-13 2019-01-08 Defa As Heating device for fluid
EP3594468A1 (fr) * 2014-03-13 2020-01-15 Defa AS Dispositif de chauffage de fluide

Also Published As

Publication number Publication date
DE102007010958A1 (de) 2008-09-11

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