Equipment

Details Equipment Equipment

H - Electricity

01

H

H01H 3/00 (2006.01) F22B 35/18 (2006.01) H01H 3/32 (2006.01) H01H 43/00 (2006.01)

Patent

CA 2582883

Provided is an equipment having a safety mechanism in hardware. The equipment is arranged such that a third relay (9) is controlled by a third contact driving circuit (11) as hardware so that an igniter (2) and a fuel supply valve (3) become operable when a blower is operated and a certain amount of time elapses. The equipment is arranged so as to complement drawbacks of software by the safety mechanism of hardware. The third contact driving circuit (11) is composed of a voltage multiplying rectifier circuit (27) containing a time constant circuit (13), an oscillating circuit (28) on a secondary side of the voltage multiplying rectifier circuit (27), a contact driving part (relay driving circuit) (37) on a secondary side of the oscillating circuit (28), and the like. The third relay (9) is connected to a part of the contact driving part (37).

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