Patent ID: 9267707
Filing Date: 2016-02-23
CPC Classification: F23D,F23L,F23N,F24H,Y02B

Claim Text:
1. A heating power adjusting apparatus of a hot blast heater which adjusts the heating power of the hot blast heater by controlling a flow cross-sectional area of air supplied to a burner of the hot blast heater, comprising: a valve body including an air injection part, an air exhaust part, and an air flow space between the air injection part and the air exhaust part; an orifice body rotatably installed in the air flow space of the valve body and provided with a substantially cylindrical segment having a plurality of orifices, the plurality of orifices having different flow cross-sectional areas to variably adjust the flow rate of air, the plurality of orifices being formed on a circumferential surface of the substantially cylindrical segment of the orifice body; a rotary knob to adjust rotation of the orifice body with respect to the valve body; and a rotary shaft connecting the orifice body and the rotary knob.