Hot Air Blower

A hot air blower, comprising:

• a fuel tank, in which fuel is stored;
• an air compression pump for sucking and compressing air;
• a pressure regulating valve installed at the air compression pump so as to decompress compressed air;
• a burner assembly for receiving the fuel from the fuel tank and the air from the air compression pump;
• and
• a combustion chamber for receiving the fuel from the burner assembly so as to combust the fuel,
• wherein the pressure regulating valve is composed of a high-pressure pressure regulating valve and a low-pressure pressure regulating valve,
• the low-pressure pressure regulating valve is provided with a low pressure valve opening and closing unit, and
• the low pressure valve opening and closing unit includes:
• a valve body installed communicating with a low pressure discharge port and having an inlet formed in the center of the front portion thereof so as to communicate with the low pressure discharge port, an outlet formed in the side surface thereof and communicating with the inlet, and an accommodation hole formed therein and communicating with both the inlet and the outlet;
• a screw valve piece having a part extending back and forth while being accommodated in the accommodation hole, a front end disposed facing the inlet, and the side surface disposed to be spaced apart from the outlet while facing the outlet, the screw valve piece being spirally coupled to the valve body so as to move linearly by rotation;
• and
• a valve knob coupled to the other end of the screw valve piece.