Combustion heater

Combustion – Timer – programmer – retarder or condition responsive control – Control of purger – of scavenger or of combustion start-up...

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Details

237 2A, 126110C, 126110D, F23N 500

Patent

active

051958864

ABSTRACT:
According to a first aspect of the invention, a combustion heater has an ECU for controlling operations of a glow plug, a battery, a fuel pump, and a blower for supplying air to a combustor. The ECU is responsive to an instruction signal instructing starting ignition of the combustor for starting to cause the battery to apply a first predetermined voltage to the glow plug, and at the same time starting to cause both of the fuel pump and the blower to operate for a predetermined time period, and when ignition of the combustor is detected, the ECU starts to cause both of the fuel pump and the blower to operate, and at the same time starts to cause the battery to apply a second predetermined voltage lower than the first predetermined voltage to the glow plug. According to a second aspect of the invention, the ECU is responsive to an instruction signal instructing stopping combustion of the combustor for causing the blower to supply air at a flow rate at which air has been supplied to the combustor immediately before the signal is supplied to the ECU, for a first predetermined time period, and after the first predetermined time period has elapsed, the ECU causes the flow rate to be progressively decreased to a first predetermined flow rate over a second predetermined time period, and then causes the blower to supply air at a second predetermined flow rate larger than the first predetermined flow rate.

REFERENCES:
patent: 4070143 (1978-01-01), Dietz
patent: 4230444 (1980-10-01), Matthews
patent: 4519772 (1985-05-01), Mittmann

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