F - Mech Eng,Light,Heat,Weapons – 23 – N
Patent
F - Mech Eng,Light,Heat,Weapons
23
N
F23N 5/18 (2006.01) F24B 5/00 (2006.01)
Patent
CA 2352648
An oxygen sensing arrangement for a gas-fired oven includes an oxygen sensor positioned for sensing gases along an exhaust path of the oven, the oxygen sensor including a heater and a measurement cell. A sensor control circuit includes a sensor initialization portion connected to a bridge portion. The bridge portion is operatively connected for energizing the heater. The sensor initialization portion produces a start signal which unbalances the bridge circuit for a start-up time period, causing the bridge circuit to deliver a heating current/voltage to the heater for the start-up time period. After the start-up time period the sensor initialization portion no longer produces the start signal and the bridge circuit balances so as to deliver an operating current/voltage to the heater. A voltage of the heating current/voltage is less than a voltage of the operating current/voltage. The arrangement enables the oxygen sensor to be heated to its operating temperature at a voltage and corresponding heating rate which will not damage the sensor, and is particularly useful where the oxygen sensor is an amperometric type sensor. The sensor may be located in a sensor chamber is positioned alongside the exhaust duct so as to be spaced from a primary flow of exhaust gases, with the chamber open to receive gases in the exhaust duct. Both the sensor chamber and oxygen sensor therein are sealed off from gases outside of the exhaust duct.
Finlayson & Singlehurst
Premark Feg L.l.c.
LandOfFree
Oven exhaust gas oxygen sensing arrangement and related... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oven exhaust gas oxygen sensing arrangement and related..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oven exhaust gas oxygen sensing arrangement and related... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1625900