G - Physics
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G01F 1/32 (2006.01) F23N 5/18 (2006.01) G01F 1/44 (2006.01) G01F 5/00 (2006.01) F23N 1/02 (2006.01)
Patent
CA 2061892
A package burner has a fan rotatably driven at constant speed. Air from the surrounding atmosphere is induced by the fan through an open end of a conduit which guides the air to the fan from which the air is propelled down an outlet passage to mix as combustion air in a chamber with fuel gas from a gas supply nozzle so that flames issue from the chamber. A valve in the conduit or outlet passage can be set to regulate how much air is supplied as combustion air. A fluidic oscillator has an inlet open to the atmosphere and has an outlet open to the interior of the conduit. The observed frequency of the fluidic oscillator is a function of the flow rate of air through the fluidic oscillator and is also a function of the flow rate of air along the conduit. Therefore the measured frequency of the fluidic oscillator can be used to calculate the amount of combustion air being supplied along the conduit in unit time.
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Gowling Lafleur Henderson Llp
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