WO2009031169A1 - Dispositif de surveillance pour un élément de sécurité d'un appareil électroménager ou d'un appareil ménager à gaz - Google Patents

Dispositif de surveillance pour un élément de sécurité d'un appareil électroménager ou d'un appareil ménager à gaz Download PDF

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Publication number
WO2009031169A1
WO2009031169A1 PCT/IT2007/000613 IT2007000613W WO2009031169A1 WO 2009031169 A1 WO2009031169 A1 WO 2009031169A1 IT 2007000613 W IT2007000613 W IT 2007000613W WO 2009031169 A1 WO2009031169 A1 WO 2009031169A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical
branches
branch
parallel
unidirectional
Prior art date
Application number
PCT/IT2007/000613
Other languages
English (en)
Inventor
Pierluigi Bertelli
Original Assignee
Bertelli & Partners S.R.L.
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 Bertelli & Partners S.R.L. filed Critical Bertelli & Partners S.R.L.
Priority to PCT/IT2007/000613 priority Critical patent/WO2009031169A1/fr
Publication of WO2009031169A1 publication Critical patent/WO2009031169A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1844—Monitoring or fail-safe circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/20—Opto-coupler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/12—Burner simulation or checking
    • F23N2227/16—Checking components, e.g. electronic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/10—Fail safe for component failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/14—Fuel valves electromagnetically operated

Definitions

  • the present invention relates to a monitoring device for a safety element of an electrical appliance for domestic use or of a gas appliance in accordance with the introduction to the main claim.
  • Each safety element present in an electrical appliance for example a washing machine, a dishwasher, a refrigerator, an oven or the like
  • a gas appliance for example the gas valve in the case of a boiler
  • the control devices usually comprise a change-over switch or a series of change-over switches provided in an electrical supply line to said safety element, the opening and closure of which results in the operation of said element.
  • a particular object of the invention is to provide a device of the stated type which is able to effectively identify all problems in the electrical supply to the safety element, such as to prevent its inopportune activation. Another object is to provide a device of the stated type which is able to identify any risk conditions (for example risk of gas leakage) if the monitored element is the gas valve and if abnormalities exist in its electrical supply. A further object is to provide a device of the stated type which enables effective control of the safety element and enables its timed operation (if provided) to be monitored as required for safety standard purposes.
  • a device of the invention comprises an electric circuit 1 connected to a power supply mains, for example of an environment in which a gas appliance is installed.
  • the circuit 1 is used to monitor the operation and power supply of a safety element of said appliance, such as a gas solenoid valve 2 presenting electrical connectors or terminals 2A and 2B which connect it to the circuit 1.
  • This solenoid valve can present a dispersion towards earth 34 indicated for example by 33 in the figure.
  • the connector 2A is connected to a first branch 3 of a power supply line 4 of the circuit 1, whereas the connector 2B is connected to the branch 5 of this line.
  • Each of the two branches 3 and 5 of the line 4 comprises a corresponding change-over switch 7 A and 7B controlled in any manner by a control element, for example external to the device of the invention such as a usual electronic control unit of the burner flame control type.
  • Each change-over switch 7A and 7B is hence able to close onto its own electrical branch 3 or 5 to power the valve 2 when necessary, to hence operate the boiler.
  • Two parallel electrical branches 10 and 11 are connected between the branches 3 and 5.
  • Each branch 10, 11 comprises a first portion 1OC, 11C positioned between the node 1OA, 11A and an intermediate node 10D, 11 D to which an electrical branch 13 comprising a resistor 14 is connected.
  • branch 15 comprising an optoisolated device such as an optoisolator 16, of known type, arranged to generate electrical signals across its terminals 16A, 16B at the moment in which an electrical signal is present in the branch 15.
  • each portion 10C, 11C comprises a resistor 18A, 18B and an electrical unidirectional device or diode 19A, 19B (which can also be of electronic type, i.e. a transistor).
  • Each branch also comprises, between the intermediate node 10D, 11 D and the node 10B, 11 B, a further branch portion 10E, 11E comprising a resistor 2OA, 2OB and another unidirectional electrical device or diode 21 A, 21 B; the latter opposes the diode 19A, 19B connected into the said branch 10, 11.
  • the diode 19A opposes the diode 19B and the diode 2OA opposes the diode 2OB (i.e. the diodes 19A, 2OB are disposed in the same direction in the respective branch portions 10, 11 , as are the diodes 19B, 21A) to hence enable an electrical signal to transit along the portions 3, 10C, 13, 15, 11 E, 5 or, vice versa (depending on the polarity), 5, 10E, 13, 15, 11C and 3 as a result of the closure of only one of the change-over switches in the respective branch in the case of a fault.
  • a further branch 30 comprising a fan 31 (to provide combustion air in the case of a gas appliance) and a controlled change-over switch 32A.
  • a fan 31 to provide combustion air in the case of a gas appliance
  • a controlled change-over switch 32A can be part of a two-pole member with a single control, said member also comprising the change-over switch 7B or 7A.
  • the optoisolator 16 senses the current circulation through the circuit 1 (of frequency double the mains frequency, i.e. 100 Hz or 120 Hz), this current enabling operation of the safety element 2. This is therefore also recognized by the appliance control unit; this latter, depending on the frequency of the electrical signal or current circulating through the optoisolator 16, can control the safety element (valve 2) to which the circuit 1 is connected. Said unit can also verify operation timing of the safety element 2, necessary for safety regulation purposes. If a fault appears in the circuit 1 , this can be immediately identified.
  • both the regular operation of the safety element and that the situation of a fault therein or in its piloting circuit can be identified rapidly even in the rest state, with consequent possible immediate intervention by the user (or by any electronic control member of the appliance) aimed at preventing further problems in the use of the appliance itself or for the environment in which it is positioned.
  • the monitoring device also enables the safety element to be actively controlled by monitoring the electrical signal generated by the optoisolator 16.
  • the invention also enables the presence of earth dispersions (for example winding insulation deficiency) of the safety element (for example if it comprises a coil) to be verified, even in the rest state.
  • earth dispersions for example winding insulation deficiency
  • the safety element for example if it comprises a coil
  • the potential difference between the branches 3 and the earth 34 generates a current flow through the branches 3, 10C, 13, 15, 11 E, 33 or 5, 10E, 13, 15, 11 C, 33, the control member then being able to act in the aforedescribed manner by monitoring the output of the optoisolator 16.
  • a preferred embodiment of the invention represented simplified in its main aspects has been described.
  • the invention has been described in particular with reference to a gas appliance, but can also be used for other electrical appliances such as washing machines, dishwashers etc.
  • the invention has been described as comprising an optoisolator device which is usually necessary when separation is required between the electrical supply mains and the control unit for the safety element, which operates at low safety voltage.
  • said optoisolator device can be omitted and, for the purpose of detecting the electrical signal transiting towards the safety element, direct use can be made of a signal withdrawn, in any known manner, from across the resistor 14 or another electrical component able to determine a passage of current through the branch 13 (such as a shunt or equivalent). Consequently other solutions are obtainable in the light of the aforegoing, and are to be considered as falling within the scope of the following claims.

Abstract

L'invention concerne un dispositif de surveillance pour un élément de sécurité ou un composant de sécurité d'un appareil électroménager ou d'un appareil ménager à gaz, tel qu'une soupape à gaz (2) ou analogue, ladite soupape (2) étant mise sous tension électrique par ledit dispositif. Le dispositif de l'invention comprend une ligne d'alimentation électrique (4) reliée à des connecteurs électriques (2A, 2B) de la soupape et reliée à une alimentation principale. Un commutateur (7) est relié à chaque dérivation opposée (2, 5) de la ligne d'alimentation (4), des dérivations électriques (10, 11) parallèles étant placées entre lesdites dérivations (3, 5) et reliées à des dispositifs (16) de détection des signaux électriques, ces derniers (16) étant reliés aux dérivations parallèles (10, 11) correspondantes, dans une position intermédiaire entre des dispositifs (19A, 21A; 19B, 21 B) unidirectionnels dirigés de manière opposée et positionnés dans chaque dérivation (10, 11), lesdits dispositifs (16) étant placés de manière à transmettre correctement le signal à l'élément de sécurité (2).
PCT/IT2007/000613 2007-09-05 2007-09-05 Dispositif de surveillance pour un élément de sécurité d'un appareil électroménager ou d'un appareil ménager à gaz WO2009031169A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT2007/000613 WO2009031169A1 (fr) 2007-09-05 2007-09-05 Dispositif de surveillance pour un élément de sécurité d'un appareil électroménager ou d'un appareil ménager à gaz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2007/000613 WO2009031169A1 (fr) 2007-09-05 2007-09-05 Dispositif de surveillance pour un élément de sécurité d'un appareil électroménager ou d'un appareil ménager à gaz

Publications (1)

Publication Number Publication Date
WO2009031169A1 true WO2009031169A1 (fr) 2009-03-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2007/000613 WO2009031169A1 (fr) 2007-09-05 2007-09-05 Dispositif de surveillance pour un élément de sécurité d'un appareil électroménager ou d'un appareil ménager à gaz

Country Status (1)

Country Link
WO (1) WO2009031169A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023062112A1 (fr) * 2021-10-13 2023-04-20 Ebm-Papst Landshut Gmbh Procédé de commande orientée sécurité

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751212A (en) * 1972-06-29 1973-08-07 Honeywell Inc Fuel burner control system
US4246621A (en) * 1977-07-15 1981-01-20 Yuken Kogyo Company Limited Energizing circuit for solenoid valve
US4599575A (en) * 1984-04-06 1986-07-08 Societe Pour L'etude Et La Fabrication De Circuits Integres Speciaux Efcis Broad-band differential amplifier with double reverse feed-back of common mode
US6129284A (en) * 1998-01-23 2000-10-10 Tridelta Industries, Inc. Integrated appliance control system
US6567255B1 (en) * 1997-06-19 2003-05-20 Bosch Rexroth Ag Electromagnetic actuator
US20060255786A1 (en) * 2003-11-06 2006-11-16 Hans Schwenkel Method and device for switching off an inductive load in a failsafe manner
US20070146956A1 (en) * 2003-12-19 2007-06-28 Karlheinz Panzer Electric circuit arrangement for controlling a solenoid-operated fluid valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751212A (en) * 1972-06-29 1973-08-07 Honeywell Inc Fuel burner control system
US4246621A (en) * 1977-07-15 1981-01-20 Yuken Kogyo Company Limited Energizing circuit for solenoid valve
US4599575A (en) * 1984-04-06 1986-07-08 Societe Pour L'etude Et La Fabrication De Circuits Integres Speciaux Efcis Broad-band differential amplifier with double reverse feed-back of common mode
US6567255B1 (en) * 1997-06-19 2003-05-20 Bosch Rexroth Ag Electromagnetic actuator
US6129284A (en) * 1998-01-23 2000-10-10 Tridelta Industries, Inc. Integrated appliance control system
US20060255786A1 (en) * 2003-11-06 2006-11-16 Hans Schwenkel Method and device for switching off an inductive load in a failsafe manner
US20070146956A1 (en) * 2003-12-19 2007-06-28 Karlheinz Panzer Electric circuit arrangement for controlling a solenoid-operated fluid valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023062112A1 (fr) * 2021-10-13 2023-04-20 Ebm-Papst Landshut Gmbh Procédé de commande orientée sécurité

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