| 摘要 |
PURPOSE:To supply combustion air always in a proper volume even if there is a faulty assembly or an adverse wind from outside by providing a detector which detects the blast volume to a burner from a fan for combustion, and a controller which corrects motor's rotational speed control by a control means according to the results of the detection. CONSTITUTION:A burner 2 is provided with an air flow speed sensor 20 which detects the air flow speed from a fan 1 for combustion to the burner 2, and it is connected to a controller 10. The controller 10 is provided with a means which detects the difference DELTAT between set temperature for the inside of room and detected temperature by a room temperature sensor 12 as a combustion load, a means to determine a gas volume Gs necessary for combustion from DELTAT and gas volume setting conditions that are beforehand stored in a memory, a means to adjust the degree of opening of a gas regulating valve 14 so as to obtain this Gs, a means to determine the rotational speed Rs of a fan motor 1M from the gas volume Gs and rotational speed setting conditions that are stored beforehand in memory, a controller which controls the rotational speed of the fan motor 1M so as to make the difference between this Rs and the result of a rotational speed sensor 13 zero, and a means to correct the rotational speed control by a control means according to the result of detection of an air flow speed sensor 20. |
