EP0115861A1 - Dispositif à préchauffer - Google Patents

Dispositif à préchauffer Download PDF

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Publication number
EP0115861A1
EP0115861A1 EP84101081A EP84101081A EP0115861A1 EP 0115861 A1 EP0115861 A1 EP 0115861A1 EP 84101081 A EP84101081 A EP 84101081A EP 84101081 A EP84101081 A EP 84101081A EP 0115861 A1 EP0115861 A1 EP 0115861A1
Authority
EP
European Patent Office
Prior art keywords
heating
chamber
heating cartridge
oil
central passage
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Withdrawn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
EP84101081A
Other languages
German (de)
English (en)
Inventor
Horst Heimler
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0115861A1 publication Critical patent/EP0115861A1/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Withdrawn legal-status Critical Current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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
    • F24H1/102—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with resistance
    • 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 preheater for heating oil, which is preferably switched on between the oil pump and burner of an oil-operated boiler fire system.
  • the invention has for its object to develop a preheater of the type mentioned, the constant, close to the optimum temperature of the Ensures the fuel oil supplied to the burner and does not lead to local overheating even in the event of burner malfunctions or temporary shutdowns.
  • this object is achieved by the features specified in the characterizing part of the main claim.
  • a pressure vessel the volume of which is so large that it acts as a kind of buffer
  • two heating cartridges are connected in series in such a way that the oil entering the pressure chamber first flows through the interior of the first heating cartridge and then through an immersion tube through the interior of the second heating cartridge, whereupon the oil is forced via a deflection to flow along the outer wall of the second heating chamber and only then enters the interior of the pressure vessel.
  • the temperature of the heating oil stored in the pressure vessel is kept at operating temperature by the heat given off via the outer surface of the first heating cartridge.
  • the invention has the particular advantage that almost 100% of the electrical heating power of the heating cartridges is supplied to the heating oil, since there is no heat loss to the surroundings.
  • the heat transfer from the heating cartridge to the heating oil is good or the heat transfer coefficient is high, and the heating cartridges can be dimensioned accordingly small.
  • the oil is fed to the burner at a constant temperature that is close to the optimum, so that the throughput can be minimized and the atomization can be optimized.
  • the pressure in the pressure vessel rises due to the thermal expansion of the enclosed oil volume, since backflow to the pump is prevented by means of a suitable check valve. When opening the burner nozzle there is a sudden pressure equalization with correspondingly fine atomization, which effectively prevents soot formation even during the ignition process.
  • the device consists of a pressure-resistant chamber 10, which is cylindrical in the exemplary embodiment shown.
  • the chamber is fed via an inlet pipe 12 from a centrifugal pump (not shown) and is connected via an outlet connection 14 to the burner or the burner nozzle of a boiler combustion system.
  • Inside the chamber 10 are a first heating element 16 and a second heating p CARTRIDGE 18 one behind the other and coaxially arranged.
  • the heating cartridges 16, 18 are cylindrical and each have a tubular central passage.
  • Suitably dimensioned mounting sockets 20, 22 are provided for introducing the heating cartridges into the chamber.
  • the embodiment shown can also be modified in such a way that the two heating cartridges arranged one behind the other can be inserted into the chamber through only one nozzle.
  • the central passage of the first heating cartridge 16 is, on the one hand, tightly connected to the inlet pipe 12 and, on the other hand, to an immersion pipe 24, which connects the interior of the first heating cartridge 16 to the interior of the second heating cartridge 18.
  • the immersion tube 24 extends right up to the end of the central passage of the second heating cartridge which is closed by a corresponding seal.
  • the second heating cartridge 18 sits in a cup-like Vessel 26 such that the mouth of the central passage is opposite the bottom of the cup.
  • a pressure chamber 28 is thus formed between the heating cartridge 18 and the bottom of the cup 26.
  • the diameter of the vessel 26 is larger than the outer diameter of the heating cartridge 18, so that a narrow annular gap is formed around the heating cartridge 18, which extends over almost the entire length of the heating cartridge 18.
  • the central passage of the heating cartridge 18 is extended in a tubular manner and connected to the bottom of the cup-shaped vessel 26.
  • Flow-through bores are arranged in the tubular extension and connect the interior of the heating cartridge 18 to the actual pressure chamber 28.
  • the annular gap between the heating cartridge 18 and the inner wall of the cup-shaped vessel 26 opens: into the chamber 10.
  • the chamber also has a venting and safety valve 30, which responds when a maximum pressure is exceeded and feeds excess oil into the return line of the pump to the tank. Furthermore, the chamber is provided with a temperature sensor 32 which controls the two heating cartridges 16, 18 in such a way that the temperature of the heating oil in the chamber 10 does not drop below 65 ° C and rise above 95 ° C. Of course, this interval can also be set differently or reduced.
  • a safety temperature sensor 34 is provided in the chamber, which interrupts further heating of the heating cartridges 16, 18 when a certain maximum temperature, for example an oil temperature of 110 ° C., is exceeded.
  • the safety valve 30 has a double function, too In addition to the pressure limitation, the air generated during filling can be blown off via this valve.
  • the chamber 10 can be surrounded with insulation, not shown, which prevents heat loss to the outside and thus ensures a constant operating temperature.
  • a suspension device can be provided on the insulation or casing for fastening to the boiler casing.
  • the measurement signals of the temperature sensors 32, 34 are given to an electronic temperature control, not shown, for example based on an IC, which can be designed, for example, such that the heating oil flowing through the device always has a temperature between 70 ° C. and 90 ° C.
  • the chamber 10 can have a volume of approximately 0.5-1 1. Depending on the desired throughput, the volume can of course also be larger or smaller.
  • the device works as follows.
  • the oil entering via the inlet pipe 12 is heated in the interior of the first heating cartridge 16, the throttle point 36 regulates to a certain extent the dwell time in the first heating cartridge.
  • the oil then reaches the bottom of the interior of the second heating cartridge 18 via the immersion tube 24 and flows in the annular space between the immersion tube 24 and the inner wall of the heating cartridge 18 to “backwards” and enters the pressure chamber 28 through flow-through bores. It flows from the pressure chamber 28 through the annular gap, along the outer surface of the heating cartridge 18, into the interior of the actual chamber 10.
  • the temperature of the heating oil in the chamber 10 is largely maintained by the heating power of the first heating cartridge 16, which emits heat to the oil located in the interior of the chamber 10 via its outer wall.
  • the oil in the chamber is under a certain pressure, which is maintained by the centrifugal pump feeding the chamber.
  • a certain target pressure for example a pressure of 16 bar compared to 9 bar operating pressure
  • the burner nozzle opens and the atomized fuel oil jet is ignited.
  • the high pressure results in very fine atomization, which on the one hand facilitates the ignition and on the other hand ensures a particularly residue-free combustion, so that no soot deposits can form on the boiler even when the system is ignited.
  • the excess pressure before ignition is of course immediately reduced, so that the chamber 10 is in the operating state under a pressure of, for example, 9 bar, which results on the one hand from the pump characteristic and on the other hand from the accumulated flow resistances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Spray-Type Burners (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
EP84101081A 1983-02-03 1984-02-02 Dispositif à préchauffer Withdrawn EP0115861A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838302976U DE8302976U1 (de) 1983-02-03 1983-02-03 Vorwaermgeraet
DE8302976U 1983-02-03

Publications (1)

Publication Number Publication Date
EP0115861A1 true EP0115861A1 (fr) 1984-08-15

Family

ID=6749611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101081A Withdrawn EP0115861A1 (fr) 1983-02-03 1984-02-02 Dispositif à préchauffer

Country Status (5)

Country Link
US (1) US4562336A (fr)
EP (1) EP0115861A1 (fr)
JP (1) JPS6016214A (fr)
CA (1) CA1223192A (fr)
DE (1) DE8302976U1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4020005C1 (fr) * 1990-06-24 1991-12-19 Danfoss A/S, Nordborg, Dk
TR200809852A1 (tr) * 2008-12-26 2010-07-21 Yenbu Maki̇ne Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Gazların genleşmesinden yararlanılarak yapılan tüketim tasarruf sistemi.
JP2017009255A (ja) * 2015-06-26 2017-01-12 新熱工業株式会社 流体加熱器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR577470A (fr) * 1924-02-20 1924-09-05 Chauffe-eau à chauffage électrique
US1529559A (en) * 1923-05-05 1925-03-10 Earle I Staples Fuel-oil heater
CH289318A (fr) * 1951-03-15 1953-03-15 Meylan Louis Appareil électrique pour le chauffage de l'eau.
FR1240342A (fr) * 1958-11-13 1960-09-02 Thermomatic S P A Installation de foyer à huile lourde
FR2258590A1 (en) * 1974-01-21 1975-08-18 Caillaud Jacques Fuel economiser for a gas burner - recycles excess fuel through preheater to burner
FR2452669A1 (fr) * 1979-03-24 1980-10-24 Afriso Euro Index Gmbh Filtre pour chauffages au mazout

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1108348B (de) * 1957-06-26 1961-06-08 Dr Hans Vonhoff Wasserwaermer, insbesondere fuer den Haushalt
US4436983A (en) * 1981-03-12 1984-03-13 Solobay Leo A Electric water heater with upwardly inclined zig-zag flow path

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1529559A (en) * 1923-05-05 1925-03-10 Earle I Staples Fuel-oil heater
FR577470A (fr) * 1924-02-20 1924-09-05 Chauffe-eau à chauffage électrique
CH289318A (fr) * 1951-03-15 1953-03-15 Meylan Louis Appareil électrique pour le chauffage de l'eau.
FR1240342A (fr) * 1958-11-13 1960-09-02 Thermomatic S P A Installation de foyer à huile lourde
FR2258590A1 (en) * 1974-01-21 1975-08-18 Caillaud Jacques Fuel economiser for a gas burner - recycles excess fuel through preheater to burner
FR2452669A1 (fr) * 1979-03-24 1980-10-24 Afriso Euro Index Gmbh Filtre pour chauffages au mazout

Also Published As

Publication number Publication date
CA1223192A (fr) 1987-06-23
JPS6016214A (ja) 1985-01-28
US4562336A (en) 1985-12-31
DE8302976U1 (de) 1983-06-23

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

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AK Designated contracting states

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

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18D Application deemed to be withdrawn

Effective date: 19850416