| 摘要 |
PURPOSE:To improve a heating feeling and prevent any erroneous operation of an electrical equipment in a hot air heating device by a method wherein blown air vol. of an air blower is delayed for a specified period of time in response to an indoor air temperature, a temperature in a hot air dust, a combustion state of a burner and a combustion continuing time and then a control circuit for changing-over large air vol. to small air vol. is provided. CONSTITUTION:When combustion of a burner 6 is switched from high to low, blown air vol. of a convection air blower 3 is changed over from large to small with a delay of a predetermined period of time by a control circuit 10 in response to an indoor air temperature detected by sensor means 11, 17, 12, a temperature in a hot air duct, a combustion state of a burner or a detected amount such as a combustion continuing time of a burner. In this way, the inside part of the equipment of the hot air heater 1 is not over-cooled in response to a variation of a predetermined time in which the convection air blower 3 continues to keep large air vol. and further the control circuit 10 arranged in the device or the electrical equipment such as an overheating safety device or the like is not exposed to a high temperature for a long period of time. |
