EP0814302A1 - Selbstregulierte Heizvorrichtung für Heizöl - Google Patents

Selbstregulierte Heizvorrichtung für Heizöl Download PDF

Info

Publication number
EP0814302A1
EP0814302A1 EP97401095A EP97401095A EP0814302A1 EP 0814302 A1 EP0814302 A1 EP 0814302A1 EP 97401095 A EP97401095 A EP 97401095A EP 97401095 A EP97401095 A EP 97401095A EP 0814302 A1 EP0814302 A1 EP 0814302A1
Authority
EP
European Patent Office
Prior art keywords
face
heating body
ptc
heater according
wing
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Withdrawn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
EP97401095A
Other languages
English (en)
French (fr)
Inventor
Pascal Gresard
Henri Canillac
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
Suntec Industries France SA
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 Suntec Industries France SA filed Critical Suntec Industries France SA
Publication of EP0814302A1 publication Critical patent/EP0814302A1/de
Withdrawn legal-status Critical Current

Links

Images

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

Definitions

  • Such a self-regulating device has the advantage of a very small footprint and above all a great hardiness of use; however, such a device is particularly difficult to adjust because its effectiveness is closely linked to the often random mechanical problems of contact between the heating elements and the heat transfer means. It is well understood indeed that if such contact was not particularly careful, it could lead to a rapid rise in temperature of the thermistor, resulting from a low thermal transfer to the product to be heated, with the consequence that the internal resistance of the thermistor, increasing proportionally, would immediately limit the heating power, which would further amplify the heat transfer fault; conversely, a particularly careful contact between the thermistors and the heating body allows the latter to recover a maximum of calories, that is to say to limit the temperature rise of the thermistor which can thus provide a power sufficient and constant to heat the fuel oil.
  • such a heater has the advantage of recovering the inevitable heat losses on the external faces of the PTC plates by pumping and thermo-injection into the heater body thus contributing to a very marked improvement in the thermal efficiency of all.
  • Another object of the invention which contributes to strengthening the mechanical contact between the various elements participating in the heating, is to provide the heater with arrangements characterized in that the folding zones of each wing consist of a double preforming of their base from of their connection line with the heating body, such as during assembly by lateral pressure on a wing, the latter, -articulated first around its connection line, then around a second line parallel to said line connection to escape the thickness of the PTC plate, comes in position parallel to the contact face of the heating body while remaining in positive support over the entire external surface of the PTC plate.
  • the heating body can be differently equipped to achieve the same end result and, in this sense, it is characterized in that a reserve of several plies is provided at the base of each wing which extends from its line of connection, first towards the outside and substantially in the plane of the contact face of the heating body with the plates, then performs a complete reversal in substantially a semicircle of diameter approximately equal to the thickness of the PTC plate to bring the contact face of the wing against the said plate by lateral pressure so as to hold it against the heating body in such a way that the wing remains well parallel to the contact face of the body and is, moreover, in positive support over the entire external surface of the same PTC plate.
  • the tubular shape of square cross section determines four rectangular outer faces, namely: two right and left side faces 4 a , 4 b , an upper face 4 c and a lower face 4 d ;
  • the tubular heating body 4 is made of a highly thermally conductive material such as brass, copper or bronze and according to the most advantageous version of the invention, it is provided in the axis of the heating body 4, a longitudinal duct 5 opening out, of circular section, inside which the fuel oil to be heated can freely circulate to be heated there, or better still, flow through stuffing elements 6 such as, for example, sintered bronze balls or the like, thereby increasing the heat exchange surfaces between the heating body 4 and the fuel oil.
  • stuffing elements 6 such as, for example, sintered bronze balls or the like
  • the inner duct 5 of the heating body 4 having, at each of its two ends, an O-ring 7 is mounted in a circular counterbore intended to receive, in a sealed manner, the connectors 2, 3 of the pipes coming respectively from the pump and the nozzle.
  • the heating elements 8, 9 are ceramic plates with a positive temperature coefficient (PTC); it is recalled here that such ceramics subjected to an electric current between their two active faces heat up and their internal resistance, unlike the conventional material, increases with temperature; at constant voltage, it follows that the current decreases and consequently, the absorbed power decreases: there results a self-limitation in temperature of these heating elements and consequently, a self-limitation of the production of heat energy.
  • PTC positive temperature coefficient
  • the two springs 12, 13 are made up of blades preferably made of spring steel, wavy along their edge, providing an elastic effect well distributed over the entire length of the wings 10, 11, thanks to the tops of the corrugation which come alternately in support on the wings 10,11, then on the internal face of the envelope 1; it is clear that such a setting, in addition to centering the assembly mounted in the cylindrical casing 1 and blocking it in the suitable position, maintains a relatively high transverse pressure coming to clamp each lateral wing 10,11 on the external face of the 8,9 platelets and help to strengthen the support between the inner face of each of the wafers 8,9 with the sides 4 a and 4 b of the heating body 4.
  • the thermal short-circuit inevitably operated by the springs between the wings 10, 11 and the casing 1 creating incontestable heat losses is, in principle, largely compensated in that such a short circuit actually contributes to lowering the temperature of the PTC wafers, i.e. to a slight increase in their intrinsic power and it has been calculated that the final heat balance is clearly positive.
  • the shims with wavy spring 11,12 can be replaced by shims obtained from a strip, for example made of brass copper or the like, folded back on itself longitudinally, the two faces being brought together. 'from each other without contact to form a half moon in cross section; these shims can then be forced in, the flat side coming against the wings 10,11 and the semi-circular part against the casing 1.
  • the heater is energized by pins 16.17 supplying the PCT plates 8.9, the burner not yet being supplied; fuel oil parked at this time in the heater just before the nozzle, therefore begins to heat up inside the duct 5 of the heating body 4, until reaching a correct spraying temperature which will then be detected by the thermostat 15, which can then switch, that is to say start the burner supplied by the two pins 17,18.
  • the construction of the heating body 4 provided with its lateral recovery wings 10, 11 will be described more particularly below, as well as the system for connecting and mounting the pads 8, 9 around the same body. heating 4.
  • the duct 5 is filled with packing elements 6 formed, for example, by small bronze balls held by any means such as sintering inside the duct 5 to increase the heat exchange surfaces between the fuel oil and the heating body 4, without too much hindering the flow of the fuel oil to be heated, which would cause a phenomenon of coking and would naturally lead to malfunction of the nozzle.
  • packing elements 6 formed, for example, by small bronze balls held by any means such as sintering inside the duct 5 to increase the heat exchange surfaces between the fuel oil and the heating body 4, without too much hindering the flow of the fuel oil to be heated, which would cause a phenomenon of coking and would naturally lead to malfunction of the nozzle.
  • the wings 10, 11 are formed from copper, bronze or brass plates whose length and width are substantially equal to the length and width of the faces of the tubular heating body 4; the thickness of the side wings 10,11 depends on the PTC plates used and their thermal power delivered; those skilled in the art can perfectly adapt the thickness of these wings to achieve optimal pumping of the heat losses from the plates 8,9.
  • Each lateral wing 10, 11 must come into intimate contact with the external face of the plates 8, 9 which themselves must come into intimate contact with the lateral faces 4 a and 4 b of the heating body 4; this implies that the wings 10,11 are parallel to the lateral faces 4a and 4b of said body, after mounting of the pads 8,9.
  • each wing is preformed by a first downward folding, from the connection line 20 to the heating body 4, then by a complete reversal according to an arc of circle of diameter equal to the thickness of the pads 8,9, the vertical portion is folded and flat 10a, 11a of the side flanges 10,11 for supplying and vertically parallel to the faces 4a, 4b of the heating body 4 (this first embodiment is not shown in Figure 4).
  • the vertical and flat part 10 a , 11 has lateral wings 10,11 will simply be connected to the heating body 4 by preforming the connection zone consisting of two successive folds from the connection line 20 to the heating body 4; the base of each wing then extends along a first surface 21 towards the outside and in the extension of the lateral contact faces 4 a , 4 b of the heating body 4; according to a first folding carried out along a line 22 parallel to the connection line 20, the flaps 10.11 are folded outwards and upwards, at an angle a; then a second folding along a new line 24 parallel to the previous two 20,22 is carried out in the same direction at an angle ⁇ making it possible to bring the vertical part 10 a , 11 a of each wing in position parallel to the lateral surfaces 4 a , 4 b of body 4; it will be noted that advantageously, the angle of folding ⁇ is equal to 45 ° and the angle ⁇ equal to approximately 135 °; indeed, it is important that the heating body 4 is centered

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
EP97401095A 1996-06-11 1997-05-16 Selbstregulierte Heizvorrichtung für Heizöl Withdrawn EP0814302A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9607224 1996-06-11
FR9607224A FR2749645B1 (fr) 1996-06-11 1996-06-11 Rechauffeur de mazout auto regule

Publications (1)

Publication Number Publication Date
EP0814302A1 true EP0814302A1 (de) 1997-12-29

Family

ID=9492930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97401095A Withdrawn EP0814302A1 (de) 1996-06-11 1997-05-16 Selbstregulierte Heizvorrichtung für Heizöl

Country Status (2)

Country Link
EP (1) EP0814302A1 (de)
FR (1) FR2749645B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1016824A2 (de) * 1998-12-28 2000-07-05 Rapa Rausch & Pausch Elektrotechnische Spezialfabrik Gmbh Vorwärmer für einen Öldruckzerstäubungsbrenner
KR101025479B1 (ko) * 2008-08-12 2011-04-04 주식회사 경동네트웍 액체연료 예열장치

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017057A1 (de) * 1979-03-27 1980-10-15 Danfoss A/S Vorrichtung zum Vorwärmen von Heizöl
DE2912000A1 (de) 1979-03-27 1980-11-06 Meku Metall Kunststoff Vorrichtung zum vorwaermen von heizoel
DE4216008A1 (de) 1992-05-12 1993-11-18 Rausch & Pausch Vorwärmer für Ölbrenner
EP0573691A1 (de) * 1992-06-11 1993-12-15 David & Baader DBK Spezialfabrik elektrischer Apparate und Heizwiderstände GmbH Verfahren zur Herstellung eines PTC-Heizkörpers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017057A1 (de) * 1979-03-27 1980-10-15 Danfoss A/S Vorrichtung zum Vorwärmen von Heizöl
DE2912000A1 (de) 1979-03-27 1980-11-06 Meku Metall Kunststoff Vorrichtung zum vorwaermen von heizoel
DE4216008A1 (de) 1992-05-12 1993-11-18 Rausch & Pausch Vorwärmer für Ölbrenner
EP0573691A1 (de) * 1992-06-11 1993-12-15 David & Baader DBK Spezialfabrik elektrischer Apparate und Heizwiderstände GmbH Verfahren zur Herstellung eines PTC-Heizkörpers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1016824A2 (de) * 1998-12-28 2000-07-05 Rapa Rausch & Pausch Elektrotechnische Spezialfabrik Gmbh Vorwärmer für einen Öldruckzerstäubungsbrenner
EP1016824A3 (de) * 1998-12-28 2000-10-11 Rapa Rausch & Pausch Elektrotechnische Spezialfabrik Gmbh Vorwärmer für einen Öldruckzerstäubungsbrenner
KR101025479B1 (ko) * 2008-08-12 2011-04-04 주식회사 경동네트웍 액체연료 예열장치

Also Published As

Publication number Publication date
FR2749645B1 (fr) 1998-07-17
FR2749645A1 (fr) 1997-12-12

Similar Documents

Publication Publication Date Title
EP2185046B1 (de) Heisswasserbereiter für eine getränkezubereitungsmaschine
WO2009156190A1 (fr) Chaudiere pour machine de preparation de boissons chaudes
WO2007039683A1 (fr) Dispositif de chauffage de liquide pour appareil electromenager
FR2750793A1 (fr) Dispositif de protection thermique pour moteurs electriques
WO2007039681A1 (fr) Dispositif de chauffage de fluide avec fusible thermique
FR2938633A1 (fr) Dispositif de chauffage de liquide pour vehicule automobile
EP0860212B1 (de) Auftragsgerät für Heissschmelzkleber und Kleberstift für dieses Gerät
EP3728962B1 (de) Elektrische heizvorrichtung mit elektrodengehäusestation
EP3619479B1 (de) Heizmodul für eine elektrische heizvorrichtung
EP2364402A1 (de) Piezoelektrische pumpe für ein elektrisches haushaltsgerät
WO2010025954A2 (fr) Dispositif de chauffage de pour vehicule automobile
EP0814302A1 (de) Selbstregulierte Heizvorrichtung für Heizöl
EP0275776B1 (de) Kontrollgerät für die Überhitzung und Verkalkung eines Flüssigkeitserhitzers und Gerät, versehen mit einem solchen Kontrollgerät
EP0597748B1 (de) Schnelldampferzeuger
FR2523216A1 (fr) Appareil de chauffage de liquides, notamment de combustibles liquides pour moteurs a combustion interne
WO1981001457A1 (en) Accumulation electric heating apparatus
EP0076735A1 (de) Apparat zum Aufbringen von wärmeschmelzbarem Leim
EP1967797B1 (de) Heizgerät mit zugehörigem Luftauslass
EP0568464B1 (de) Heizgerät, insbesondere Handtuchtrockner, mit elektrischer Heizleitung
EP3814692B1 (de) Elektrischer heizblock
EP0657132A1 (de) Form und Anordnung der Bauelemente eines Fleischgrillgerätes mit Kunststoffgehäuse
FR2631427A1 (fr) Element chauffant pour un radiateur electrique utilise pour le chauffage de locaux, notamment de type continu
FR3083301A1 (fr) Bloc de chauffage assemble par brasage
FR2692342A1 (fr) Dispositif de chauffage d'un liquide pourvu d'un organe de régulation thermique d'ambiance.
FR2805705A1 (fr) Unite de chauffage, notamment de fixation de toner

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE DK IT LI SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19980630