Device for the multifunctional control of the supply of a...

F - Mech Eng,Light,Heat,Weapons – 23 – N

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F23N 1/00 (2006.01)

Patent

CA 2619221

A device for the multifunctional control of the supply of a combustible gas to a burner apparatus (4) is disclosed and comprises, in a main gas supply duct (2), an electromagnetically controlled electrovalve (6) with an on/off function, a flow regulator (9) downstream of this electrovalve and comprising a valve seat, a respective shutter associated therewith and controlled by a reversible electric motor (20), such as a step-by-step motor, for the control of the displacement of the shutter with respect to the valve seat. The device further comprises means (22) for detecting the intercepted condition of the valve seat and means (25) for generating a signal correlated with the detected intercepted condition of the valve seat, this signal being adapted to supply the corresponding consent for the control to open or close the electrovalve (6), in order to enable or prevent the passage of gas through this duct (2) in the phases of ignition and extinction of the burner (4) respectively.

L~invention concerne un dispositif de commande multifonctionnelle de l~alimentation d~un appareil à brûleur (4) en gaz combustible. Le dispositif comprend, dans une conduite principale d~alimentation en gaz (2), une électrovanne à commande électromagnétique (6) dotée d~une fonction d~ouverture/fermeture, un régulateur de débit (9) placé en aval de l~électrovanne et comprenant un siège de vanne, un clapet respectif associé à celui-ci et commandé par un moteur électrique réversible (20), tel qu~un moteur pas à pas, servant à commander le mouvement du clapet par rapport au siège de vanne. Le dispositif comprend en outre un moyen (22) servant à détecter l~état intercepté du siège de vanne et un moyen (25) servant à générer un signal corrélé à l~état intercepté détecté du siège de vanne, ce signal fournissant une commande d~ouverture ou de fermeture de l~électrovanne (6) afin de permettre et de bloquer le passage du gaz dans la conduite (2) au cours, respectivement, des étapes d~allumage et d~extinction de l~appareil à brûleur (4).

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