| 摘要 |
PURPOSE:To prevent the generation of yellow flame and CO in large amounts by enabling the amount of combustion to be smoothly changed by a method in which the output of a differential amplifier is transmitted through an integration circuit to the drive circuit of fan motor. CONSTITUTION:In an integration circuit 40 made up of CR and, the output voltage V0 of a differential amplifier 32 is used as an input, and output terminal voltage V01 is supplied to the + input side of a differential amplifier 37a. For this reason, even when the output voltage V0 of the differential amplifier 32 is abruptly changed, it is transmitted through the integration circuit 40 to the drive circuit 37 of a fan motor 17a, and therefore, the input voltage V01 of the drive circuit 37 is slowly changed and the rotation number of the motor 17a is slowly changed. The amount of combustion is easily and smoothly changed to prevent the generation of large amounts of yellow flame and CO. |
