Combustion – Timer – programmer – retarder or condition responsive control – Control of purger – of scavenger or of combustion start-up...
Reexamination Certificate
2007-04-17
2010-11-02
McAllister, Steven B (Department: 3749)
Combustion
Timer, programmer, retarder or condition responsive control
Control of purger, of scavenger or of combustion start-up...
C431S030000, C431S031000, C431S353000, C126S101000, C126S11600A, C126S350100, C122S018100
Reexamination Certificate
active
07824177
ABSTRACT:
Provided is a combustion apparatus that can positively prevent a combustible gas present in the vicinity from catching fire in performing prepurge, which involves exhausting air from a combustion chamber provided with a burner, before igniting the burner. The combustion apparatus1contains combustion control means6that ignites the burner after performing prepurge by use of a fan4, and gas detection means5that is provided between an air supply port7and the fan4and detects the concentration of a combustible gas. The combustion control means6ascertains, before starting the prepurge, whether a combustible gas of a preset maximum concentration or higher is detected by use of the gas detection means5(STEP1) and prohibits the prepurge by prohibiting the energization of the fan4when a combustible gas of the maximum concentration or higher has been detected (STEP2).
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Okamoto Hideo
Takasu Yoshihiko
McAllister Steven B
Rankin , Hill & Clark LLP
Rinnai Corporation
Savani Avinash
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