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EP0013488A1 - Procédé de démarrage pour un brûleur à huile et brûleur à huile - Google Patents

Procédé de démarrage pour un brûleur à huile et brûleur à huile Download PDF

Info

Publication number
EP0013488A1
EP0013488A1 EP79302808A EP79302808A EP0013488A1 EP 0013488 A1 EP0013488 A1 EP 0013488A1 EP 79302808 A EP79302808 A EP 79302808A EP 79302808 A EP79302808 A EP 79302808A EP 0013488 A1 EP0013488 A1 EP 0013488A1
Authority
EP
European Patent Office
Prior art keywords
pump
motor
fan
speed
circuit
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.)
Ceased
Application number
EP79302808A
Other languages
German (de)
English (en)
Inventor
Hans Per Reinhold Edman
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.)
DeLaval International AB
Original Assignee
Zander and Ingestrom AB
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 Zander and Ingestrom AB filed Critical Zander and Ingestrom AB
Publication of EP0013488A1 publication Critical patent/EP0013488A1/fr
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/025—Regulating fuel supply conjointly with air supply using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed

Definitions

  • the present invention relates to a method of starting an oil burner unit comprising a fan, a pump, and a motor for driving the fan and the pump.
  • an electric motor which drives the oil pump as well as the fan for supplying air to the combustion chamber.
  • a so called preventilation period is prescribed during the course of starting which means that the fan is to be operated for a certain period of time to ventilate the combustion chamber before the oil supply and the combustion begin.
  • this is obtained by means of a solenoid valve which is controlled by a time delay relay and prevents the supply of oil to the pump during, e.g. the first 10 to 15 seconds following the starting of the motor.
  • the object of the invention is to eliminate the need for the above mentioned solenoid valve, whereby a simplification and a considerable reduction of cost can be obtained.
  • This invention accordingly provides a method of starting an oil burner unit comprising a fan, a pump, and a motor for driving the fan as well as the pump characterised in that the pump is of the kind (known per sc) which begins to operate only when exceeding a critical rotational speed, and that the motor is first, operated at a lower rotational velocity at which the fan operates but not the pump, whereafter the rotational speed is increased above the critical speed so that the pump begins to operate also.
  • the invention also provides an oil burner unit for carrying out the above mentioned method, comprising a fan, an oil pump and an electric motor for driving the pump and the fan wherein the pump is of the type (known per se) which delivers liquid only when rotating at or above a critical rotational speed, and that the electric motor is controlled by control gear including a first current supply circuit which operates the motor to drive the pump at a speed below the critical speed, a second current supply circuit which operates the motor to drive the pump at a speed at or above its critical speed, a start switch which closes the first circuit and a time- delay device which operates closes the second circuit a predetermined time after closure of the first circuit.
  • Suitable pumps for use in carrying out the invention are known per se, for example from Swedish Patent 335477 which discloses a pump comprising an inner rotor having a number of radially extending bores with respective plungers co-operating at thieir outer ends with an outer stator having a cylindrical chamber disposed eccentrically in relation to the rotor axis.
  • the plungers When the rotor rotates above a critical speed, the plungers are urged outwardly against the stator chamber, the eccentric form of which causes the plungers to he reciprocated within their bores, the inner ends of which act as positive displacement pumping chambers from which oil is expelled under pressure to a central delivery conduit.
  • the rotational speed is helow the critical speed, the plungers are not thrown out against the slator chamber so that there is no pumping action and no oil delivery.
  • the unit illustrated on the drawing comprises an electric motor 1 which is drivingly connected to a fan 2 and a pump 3.
  • the last mentioned is of the kind mentioned above and begins to operate at a critical rotational velocity of 2400 rmp.
  • the fan 2 and the pump 3 are directly connected to the shaft of the motor so as to rotate at the same velocity.
  • the motor 1 is started by throwing a double switch 4 which closes a first current circuit of the motor through a contact relay 5.
  • a resistor 6 of a suitable size is provided in the current circuit as a means for reducing the rotational velocity, whereby the motor is caused to operate at about 2200 rmp. At this speed the pump 3 does not operate to deliver oil, but the fan 2 supplies air to the combustion chamber which is thereby ventilated.
  • a time delay relay 7 is energised which after about 10 seconds closes a switch 8.
  • the motor 1 is thereby connected through a second circuit directly to the source of current, whereby the reducing effect of the resistor 6 upon the rotational velocity ceases and the speed of revolution increases to the normal operating speed of the unit i.e. about 2500 rpm.
  • the pump 3 then starts operating and supplies oil to the combustion chambers and combustion can begin.
  • the speed of the motor may also be controlled otherwise than by means of the resistor mentioned above, e.g. by means of a condensor or a winding or by thyristor control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Regulation And Control Of Combustion (AREA)
EP79302808A 1978-12-21 1979-12-06 Procédé de démarrage pour un brûleur à huile et brûleur à huile Ceased EP0013488A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7813158 1978-12-21
SE7813158A SE7813158L (sv) 1978-12-21 1978-12-21 Forfarande for igangsettning av ett oljebrennaraggregat

Publications (1)

Publication Number Publication Date
EP0013488A1 true EP0013488A1 (fr) 1980-07-23

Family

ID=20336668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79302808A Ceased EP0013488A1 (fr) 1978-12-21 1979-12-06 Procédé de démarrage pour un brûleur à huile et brûleur à huile

Country Status (3)

Country Link
EP (1) EP0013488A1 (fr)
DK (1) DK545579A (fr)
SE (1) SE7813158L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740047A1 (de) * 1987-11-26 1989-06-08 Man Technologie Gmbh Verfahren und vorrichtung zur steuerung der verbrennungsluft fuer einen brenner

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281020B (de) * 1967-03-14 1968-10-24 Danfoss As Anlaufschaltung fuer einen Einphasenmotor
DE1451405A1 (de) * 1964-12-07 1969-03-06 Licentia Gmbh OElbrennergeblaese,insbesondere fuer Hausbeheizungen
DE2000714A1 (de) * 1969-01-10 1970-07-23 Cem Comp Electro Mec Pumpen-Geblaese mit einem Antriebsmotor
DE2058637A1 (de) * 1969-12-05 1971-06-16 Stenberg Flygt Ab Verzoegerungsvorrichtung bei OElpumpen,insbesondere OElbrennerpumpen od.dgl.
DE1763405A1 (de) * 1965-02-17 1971-11-11 Bosch Gmbh Robert Anlassvorrichtung fuer einen elektrischen Universalmotor
AT295717B (de) * 1969-05-17 1972-01-10 Danfoss As Elektrischer Einphasenmotor, insbesondere für Ölbrenner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1451405A1 (de) * 1964-12-07 1969-03-06 Licentia Gmbh OElbrennergeblaese,insbesondere fuer Hausbeheizungen
DE1763405A1 (de) * 1965-02-17 1971-11-11 Bosch Gmbh Robert Anlassvorrichtung fuer einen elektrischen Universalmotor
DE1281020B (de) * 1967-03-14 1968-10-24 Danfoss As Anlaufschaltung fuer einen Einphasenmotor
DE2000714A1 (de) * 1969-01-10 1970-07-23 Cem Comp Electro Mec Pumpen-Geblaese mit einem Antriebsmotor
AT295717B (de) * 1969-05-17 1972-01-10 Danfoss As Elektrischer Einphasenmotor, insbesondere für Ölbrenner
DE2058637A1 (de) * 1969-12-05 1971-06-16 Stenberg Flygt Ab Verzoegerungsvorrichtung bei OElpumpen,insbesondere OElbrennerpumpen od.dgl.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740047A1 (de) * 1987-11-26 1989-06-08 Man Technologie Gmbh Verfahren und vorrichtung zur steuerung der verbrennungsluft fuer einen brenner

Also Published As

Publication number Publication date
DK545579A (da) 1980-06-22
SE7813158L (sv) 1980-06-22

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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

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19810106

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

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19831013

RIN1 Information on inventor provided before grant (corrected)

Inventor name: EDMAN, HANS PER REINHOLD