| 摘要 |
<p>The purpose of the present invention is to changeably control thermal power generated from a burner by controlling air pressure supplied to the burner by selectively controlling a cross-sectional area of an orifice in an air flow space located between a pump and a burner head. To achieve the described purpose, the present invention is an apparatus to control thermal power by controlling the flow of air supplied from the burner of a hot air blower. The apparatus comprises: an air injecting part (12); an air discharging part (14); a valve body (10) forming an air flow space between the air injecting part (12) and the air discharging part (14); an orifice body (20) which is installed to be rotatable in the flow space of the valve body (10) and forms multiple orifices (22) having different cross-sectional area of flow in order to control the amount of air flowing; and a rotating knob (30) to control the rotation of the orifice body (20) of the valve body (10).</p> |
