Combustion controlling system
AssigneeAzbil Corporation
InventorsTomoya Nakata, Yuichi Kumazawa, Katsumi Morikawa
Life of this patent
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Abstract
A combustion controlling system according to the present invention provides a signal path for transmitting an ignition preparation signal SA output from a master device to a transmission line through cascade-connected slave devices. Then, each of the slave devices determines whether each of the slave devices outputs the ignition preparation signal to a subsequent device, or not, based on whether there is a flame of the corresponding burner, or not, at the time of igniting the burners, and the master device opens a safety shutoff valve on the condition that an ignition preparation signal SAo has been input from the transmission line.
Claims5
A combustion controlling system comprising:
- a master device that controls opening and closing of a common safety shutoff valve collectively switching supply and shutoff of a fuel to a plurality of burners and generates a predetermined signal;
- a plurality of slave devices that are provided corresponding to the respective burners, the plurality of slave devices configured to determine whether there is a flame in the corresponding respective burners, control an ignition of the corresponding respective burners, and output the input predetermined signal when it is determined that there is no flame before the ignition of the corresponding respective burners, and output no predetermined signal when it is determined that there is the flame before the ignition of the corresponding respective burners;
- and
- a transmission line connected to the master device for transmitting the predetermined signal, wherein
- the plurality of slave devices are connected in cascade, when all of the plurality of slave devices determine that there is no flame before the ignition of the corresponding respective burners, the predetermined signal input to an initial-stage slave device of the plurality of slave devices from the master device is sequentially output and output from a final-stage slave device of the plurality of slave devices to the transmission line, when any one of the plurality of slave devices determines that there is the flame before the ignition of the corresponding burner, the predetermined signal is not output from the final-stage slave device to the transmission line, and the master device controls the opening and closing of the safety shutoff valve based on whether the predetermined signal transmitted through the transmission line is input.
Dependencies are inferred from the claim text.