Burner controller assembly

Details Burner controller assembly Burner controller assembly

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 31/10 (2006.01) F16K 51/00 (2006.01) F23N 1/00 (2006.01) F23N 5/10 (2006.01) F23N 5/24 (2006.01)

Patent

CA 2254966

A burner controller ( 10) for safe operation of a furnace has a an electromechanical latch (34) for holding first and second fuel valves (41, 42) open responsive to an enable signal. The latch comprises an armature (32) attached to the second valve (42) and an electromagnet assembly (33) attached to the first valve (41). When the electromagnet assembly (33) receives the enable signal and the armature (32) is attracted to the electromagnet assembly (33), the magnetic force opposes force of a spring (27) urging the first and second valve (41, 42) simultaneously closed. When the enable signal is not present, the spring forces (27) both valves (41, 42) into their closed position. An auxiliary valve (58) in series flow arrangement with the second valve (42) opposes flow of fuel passing through the second valve (42) in certain situations.

Un dispositif de commande pour brûleur (10), permettant le fonctionnement sans danger d'une chaudière, comporte un verrou électromécanique (34) qui maintient ouvertes une première et une seconde vanne de combustible (41, 42) en réponse à un signal de validation. Le verrou comprend une armature (32) fixée sur la seconde vanne (42) et un ensemble électro-aimant (33) fixé sur la première vanne (41). Quand l'ensemble électro-aimant (33) reçoit le signal de validation et que l'armature (32) est attirée vers l'électro-aimant (33), la force magnétique s'oppose à la force d'un ressort (27) qui ferme simultanément la première et la seconde vanne (41, 42). Quand le signal de validation n'est pas présent, le ressort (27) pousse les deux vannes (41, 42) en position fermée. Une vanne auxiliaire (58), montée en série avec la seconde vanne (42) en ce qui concerne l'écoulement fluidique, empêche le combustible, dans certaines situations, de traverser la seconde vanne (42).

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