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WO1986005860A1 - Dispositidf de securite pour un four, en particulier un four a petrole - Google Patents

Dispositidf de securite pour un four, en particulier un four a petrole Download PDF

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Publication number
WO1986005860A1
WO1986005860A1 PCT/NL1986/000010 NL8600010W WO8605860A1 WO 1986005860 A1 WO1986005860 A1 WO 1986005860A1 NL 8600010 W NL8600010 W NL 8600010W WO 8605860 A1 WO8605860 A1 WO 8605860A1
Authority
WO
WIPO (PCT)
Prior art keywords
stove
safety device
sensor
burner
height
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
PCT/NL1986/000010
Other languages
English (en)
Inventor
Johannes Martinus Minten
Hubertus Leonardus Minten
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 WO1986005860A1 publication Critical patent/WO1986005860A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C5/00—Stoves or ranges for liquid fuels
    • F24C5/16—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F23N5/006—Systems for controlling combustion using detectors sensitive to combustion gas properties the detector being sensitive to oxygen

Definitions

  • Safety device for a stove in particular a paraffin stove.
  • the invention relates to a safety device for a stove wherein during normal operation the height of flames produced by the stove being beyond a certain range and/or of the extent to which a heating means becomes hot is characteristic for an undesired operating condition.
  • the present invention relates in particular to a paraffin stove.
  • the purpose of the invention is to remove one or more of the above-mentioned disadvantages and/or other disadvantages of known stoves and for that purpose provides a safety device of the kind mentioned in the preamble, which is characterized in that it comprises a sensor means" for scanning said height(s) and, when they are beyond the respective range, giving a detection signal representative therefor and an actuator means for setting the stove in a desired operating- condition or putting the stove out of action in response to the detectio signal.
  • the safety device advantageously comprises therefore a sensor means with one or more sensors for detecting one or more of the following conditions with a paraffin stove with two-stage combustion: too low flames, too high flames, the burner for the initial combustion being hot within a too small range. It should be remarked hereby that the sensor for the last-mentioned condition will be located comparatively high relative to the lower burner. With a type of paraffin stove with a single burner corresponding with the afore-mentioned lower burner the sensor will be placed comparatively low relative to said burner.
  • the undesired operating condition i.e. the stove operating when insufficient oxygen is present and the stove operating- such that soot and/or smell is produced
  • the safety device advantageously comprises an actuator means which, when the stove operates when too little oxygen is present, puts said stove out of operation by e.g. putting the burner out of action or, with an operation condition of the stove whereby soot and/or smell is produced, sets the stove in a desired operating condition by e.g. automatically adjusting the wick to a suitable height, among which the maximum height, the minimum height or a height between said heights.
  • reference number 1 indicates a strongly diagrammatically and simplified representation of a paraffin stove of the two-stage combustion type
  • reference number 2 indicates the safety device according to the present invention, be it in the form of a much simplified block diagram.
  • the safety device in particular the electric or electronic part thereof using components according to the present state of the art, among which a range of sensors, actuators, digital circuits and even microprocessors.
  • the paraffin stove 1 comprises a tank 11 for paraffin or another suitable liquid fuel. Connected with the tank 11 is a burner regulator 12 with a fuse means 13, in particular a wick. The burner regulator is provided with an adjusting means not further illustrated, for adjusting the height of the fuse means which is naturally connected with the paraffin present in the tank 11.
  • a combustion will take place as a t • -- result of the evaporation of the paraffin and its reaction with oxygen, which produces heat. Said lighting may be done e.g. with matches, but in the illustrated embodiment of the paraffin stove 1 an ignition means 14 is provided, being electronic in said illustrated embodiment.
  • a safety mechanism 15 operating in this embodiment with the adjusting means mentioned before and not illustrated to make the fuse means go down so far that the fire is put out when the paraffin stove 1 is overturned or knocked down. This is one of the ways of what is called putting the burner out of action.
  • a heating means or burner head comprising a lower burner 16 and an upper' burner 17.
  • the lower burner 16 comprises an element in the form of substantially a closed tube.
  • a plate 19 On the upper side of the non- perforated tube of the upper burner 17 a plate 19 has-been placed.
  • the flame or flames 18 hereby develop mainly along the circumference of the non-perforated tube, deviating, as a result of the action of the circula plate 19, upwards from said surface of the cilindrical non-perforated tube, so taht an upwardly fanned out shape arises.
  • the safety mechanism may comprise a counterweight and a pawl, whereby the pawl is biased with the counterweight on adjustment of the wick height by the burner regulator, which may be called the putting into action of the burner, whereby on excitation by e.g. pushing against the safety mechanism 15 the counterweight is displaced, the pawl moves back and the wick height is adjusted to its minimum by the adjusting element and the burner, as said before, is put out of action.
  • paraffin stoves with an electric ignition are known, for which purpose there is a provision in the paraffin stove for the connection and accommodation of one or more batteries. In principle it is possible, therefore, that there is a source of electric energy present in the known paraffin stoves.
  • paraffin stoves are known or conceivable with in addition to a source of electric energy an electronic device for controlling the putting into and out of action of the burner as well as the adjustment of the height of the fuse means, e.g. in " operation with a possibly electronic time clock and a thermostat.
  • the larger part of the time ⁇ clock may comprise a part of afore-said integrated circuit ( iming part) .
  • the same may apply to the thermostat.
  • the safety device can simply be built into known paraffin stoves by providing therin a sensor means and an actuator means and providing electronic circuitry or modifying the electronic device present, which may in practice boil down to replacing one chip by another.
  • the safety device being electronic by nature in the illus ⁇ trated embodiment, comprises an electronic circuit 24, a sensor means 21a,21b, 22a, 22b, an actuator means 29 and a power supply means which last means may be formed by the batteries already present in the stove.
  • the illustrated safety device according to the invention comprises a delay means 27 and a response delaying means 28, whose operation will be explained in detail later on, as well as a time clock means 25 and a thermostat means 26, which may have been formed by the afore-mentioned time clock and thermostat or may comprise these.
  • the illustrated safety device is electronic by natur as said before, this is not necessary; when e.g. the sensor means comprises a bimetal said bimetal may control the actuator means 29 directly.
  • the safety device 2 therefore comprises a sensor means 21a-b, 22 a-b, which comprises at least one sensor.
  • the sensor means scans or detects whether the height of the flame or flames is beyond a certai range, i.e. whether the flame is too low and/or too high.
  • the sensor means comprises in particular a first flame sensor 21a and a second flame sensor 21b, whereby the first flame sensor 21a is located at a comparatively great height and the flame sensor 21b is located at a comparatively small height relativ to the upper burner 17.
  • the first flame sensor 21a therefore detects too high flames and the second scanning sensor -detects too low flames.
  • the first flame sensor 21a detects an abnormal operating condition whereby soot and/or smell is produced
  • flame sensor 21b detects an abnormal operating condition whereby too little oxygen is present and there is a danger of carbon monoxide being produced.
  • the sensor 21a is important, because possibly the production of soot and/or smell is not detected by a person.
  • the flame sensor 21b is of great importance, because it makes it possib as it were to detect that there is too little oxygen for a safe operation of the paraffing stove.
  • the flame sensor may e.g. be a thermo couple, bimetal, a visible light sensor, an invisible light sensor or an ionisation sensor. It will be apparent to the average person skilled in this field of the art how a useful detection signal can be obtained from said sensors. The same applies with relation to their location relative to the upper burner.
  • the two-stage paraffin stove may comprise a heat or radiation sensor 22a, which is located at a comparatively great height relative to the initial burner 16.
  • Said heat or radiation sensor 22a has a function similar to that of flame sensor 21a, be it that the operating condition related to the sensor 22a occurs with a fuse means 13 adjusted too low.
  • the embodiment illustrates a second heat or radiation sensor 22b, it is specifically intended for a paraffin stove with a single burner head 16. In that case the sensor 22b is located at a comparatively small height relative to the burner 16 in order to have an operation analogue to that of sensor 21b, viz. too little oxygen for an adequate combustion with the corresponding possible danger of carbon monoxide being developed.
  • two heat or radiation sensors 22a, 22b may be provided, whereby sensor 22a corresponds with a too high position of the wick and sensor 22b may be (also) representative for a fuse means 13 adjusted too low.
  • the heat or radiation sensors 22a, 22b may e.g. be a thermo couple, a bimetal or an infrared sensor.
  • the signals of the sensors 21a-b, 22a-b are supplied to the electronic circuit.
  • the electronic circuit 24 has a discriminating element to dertermine whether the detection signal of the sensors is representative for the case of too little oxygen being present or for the case of soot and/or smell being produced.
  • the electronic circuit 24 will excite the actuator means 29 to put the burner 16,17 out of action; whereas in the second case the electronic circuit may drive the actuator means to make the adjusting means of the burner regulator 12 adjust the fuse to a certain position, as said before possibly a minimum, intermediate or maximum position.
  • the electronic circuit may comprise a counting means to record how often the adjusting means has been driven by the actuator menas to assume a correct position from a position too high or too low and a detecting means to put the burner out of action yet after a certain numer of times having been counted by the counting means.
  • the detection signals may hereby simulate the operation of the time clock means 25 and/or the thermostat means 26, therefore.
  • the actuator means 29 may be connected with the adjusting means of the burner regulator.
  • the actuator means may be connected to the safety mechanism in order to simulate an overturn or knock ⁇ down, as it were.
  • the actuato means may comprise an electromotor for separately controlling the adjusting height of the fuse means 13, i.e. independent of the burne regulator, with which the fuse height can be adjusted by hand, whereby preferably the safety mechanism 15 is at once set "ready" for action.
  • the actuator means may also be of the electromagnetic type for, if driven, pushing over the switch pawl of the safety mechanism 15, thus simulating an overturn or a knock-down.
  • the driving means may be an electromagnet.
  • the delay means 27 has for its function the blocking, for a certain time, of the drivability of the actuator means 29.
  • a certain time elapses namely between the moment when the stove is (can be) put into action and the moment when flames develop as illustra in the embodiment, i.e. normal operation.
  • Said delay means 27 may be a timer and be incorporated in an integrated circuit or be provided in the form of a separate (smaller) integrated circuit.
  • the response delaying means 28 is also provided to prevent false triggering of the actuator means on the basis of detection signals of the sensor means in e.g. the case of flaring of the flame, whereby the flame may be too low for a short period of time.
  • This response delaying means may be realized in a timer-IC or be incorporated in a larger integrated circuit. It will be apparent that the delay time of the delay means 27 will be longer ' than that of the response delaying means 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Control Of Combustion (AREA)

Abstract

Dispositif de sécurité destiné à un four du type dans lequel, en fonctionnement normal, la hauteur des flammes produites par le four dépassant une certaine plage et/ou étant d'une importance à laquelle un moyen de chauffage devient brûlant, est caractéristique d'un état de fonctionnement non désiré. Le dispositif comporte un capteur qui explore ladite ou lesdites hauteur(s) et, lorsque celle(s)-ci dépasse(nt) la plage respective, produit un signal de détection significatif, et un actuateur qui remet le four dans un état de fonctionnement désiré ou le met hors service en réponse audit signal de détection.
PCT/NL1986/000010 1985-03-27 1986-03-27 Dispositidf de securite pour un four, en particulier un four a petrole Ceased WO1986005860A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8500889 1985-03-27
NL8500889A NL8500889A (nl) 1985-03-27 1985-03-27 Beveiligingsinrichting voor een kachel, in het bijzonder een petroleumkachel.

Publications (1)

Publication Number Publication Date
WO1986005860A1 true WO1986005860A1 (fr) 1986-10-09

Family

ID=19845743

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1986/000010 Ceased WO1986005860A1 (fr) 1985-03-27 1986-03-27 Dispositidf de securite pour un four, en particulier un four a petrole

Country Status (3)

Country Link
EP (1) EP0217909A1 (fr)
NL (1) NL8500889A (fr)
WO (1) WO1986005860A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0424597A1 (fr) * 1989-10-26 1991-05-02 Toyotomi Co., Ltd. Procédé pour contrôler et arrêter le fonctionnement des fours conformément à la sécurité notamment des fours à pétrole et dispositif pour exécuter ce procédé
GB2254945A (en) * 1991-04-19 1992-10-21 British Gas Plc Thermoelectric sensor for a gas burner
TR25545A (tr) * 1989-10-26 1993-05-01 Toyotomi Kogyo Co Ltd BORUSUZ SOBALARIN ÖZELLIKLE GAZ SOBALARININ EMNIYET KURALLARINA UYGUN CALISTIRILMASI VE KONT- ROLüNE AIT SISTEM VE BU SISTEM ICIN GEREKLI TERTIBAT
FR2751400A1 (fr) * 1996-07-16 1998-01-23 Dtn Fr Sa Convecteur radiant a petrole a meche associe a un thermostat
NL2002762C2 (nl) * 2009-04-17 2010-10-19 D & J Holding B V Sfeerhaard, ingericht voor het verbranden van vloeibare brandstof, in het bijzonder bio-ethanol.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1212453A (fr) * 1958-10-16 1960-03-24 Dispositif de sécurité pour appareils à gaz
US4392813A (en) * 1979-08-20 1983-07-12 Matsushita Electric Industrial Co., Ltd. Combustion appliance with safety device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1212453A (fr) * 1958-10-16 1960-03-24 Dispositif de sécurité pour appareils à gaz
US4392813A (en) * 1979-08-20 1983-07-12 Matsushita Electric Industrial Co., Ltd. Combustion appliance with safety device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Volume 8, No. 132, 20 June 1984 & JP, A, 5932717 (Matsushita) 22 February 1984 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0424597A1 (fr) * 1989-10-26 1991-05-02 Toyotomi Co., Ltd. Procédé pour contrôler et arrêter le fonctionnement des fours conformément à la sécurité notamment des fours à pétrole et dispositif pour exécuter ce procédé
WO1991006808A1 (fr) * 1989-10-26 1991-05-16 Toyotomi Kogyo Co., Ltd. Procede de controle et de maintien de la securite de fonctionnement des poeles sans conduit, en particulier des poeles a mazout, et dispositif pour la mise en ×uvre du procede
US5165883A (en) * 1989-10-26 1992-11-24 Toyotomi Co. Ltd. Apparatus and method for safe operation of kerosene heaters
TR25545A (tr) * 1989-10-26 1993-05-01 Toyotomi Kogyo Co Ltd BORUSUZ SOBALARIN ÖZELLIKLE GAZ SOBALARININ EMNIYET KURALLARINA UYGUN CALISTIRILMASI VE KONT- ROLüNE AIT SISTEM VE BU SISTEM ICIN GEREKLI TERTIBAT
GB2254945A (en) * 1991-04-19 1992-10-21 British Gas Plc Thermoelectric sensor for a gas burner
US5393222A (en) * 1991-04-19 1995-02-28 British Gas Plc Thermoelectric sensor
FR2751400A1 (fr) * 1996-07-16 1998-01-23 Dtn Fr Sa Convecteur radiant a petrole a meche associe a un thermostat
EP0824208A1 (fr) * 1996-07-16 1998-02-18 D.T.N. France Convecteur radiant à pétrole à mèche associé à un thermostat
NL2002762C2 (nl) * 2009-04-17 2010-10-19 D & J Holding B V Sfeerhaard, ingericht voor het verbranden van vloeibare brandstof, in het bijzonder bio-ethanol.

Also Published As

Publication number Publication date
NL8500889A (nl) 1986-10-16
EP0217909A1 (fr) 1987-04-15

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