Hot Air Blower

Abstract

A hot air blower includes a shell including a fan mechanism, a combustion device, a vane mechanism, and a flame protector disposed therein. The vane mechanism includes a clipping seat and a plurality of guiding vanes extended thereon. The plurality of guiding vanes extend obliquely and prevents the air passing through the vane mechanism from generating turbulence. The clipping seat and the flame protector form a half-closed combustion chamber therebetween. Heat in the half-closed combustion chamber causes a thermal expansion of the air and, thereby increasing a speed and a volume of the air passing the guiding vanes of the vane mechanism. Heated air is discharged from an external flow tube and which controls a heating range of an area of the hot air blower.

What is claimed is: 
     
         1 . A hot air blower comprising:
 a shell;   a fuel canister, a fan mechanism, a combustion device, a vane mechanism, and a flame protector disposed within the shell, with the fan mechanism blowing air, with the combustion device including a burning end for giving out heat of combustion, with the vane mechanism disposed in a position making the combustion device locate between the fan mechanism and the vane mechanism, with the vane mechanism including a clipping seat and a plurality of guiding vanes, with each of the plurality of guiding vanes extending obliquely on the clipping seat and make as a one-piece structure to prevent air passing through the vane mechanism from generating turbulence and to achieve a flow-regulating effect; with the flame protector disposed in the vane mechanism and hooding the burning end of the combustion device, with the air passing the vane mechanism able to be expelled out of the flame protector, with the clipping seat and the flame protector forming a half-closed combustion chamber therebetween, with heat in the half-closed combustion chamber causing a thermal expansion of the air and thereby increasing a speed and a volume of the air passing the guiding vanes of the vane mechanism; and   an external flow tube fixed in and extended out of the shell, with heated air discharged out of the hot air blower from the external flow tube and which controls a heating range of an area of the hot air blower.   
     
     
         2 . The hot air blower as claimed in  claim 1 , wherein the plurality of vents are circumferentially disposed on the flame protector. 
     
     
         3 . The hot air blower as claimed in  claim 1  further comprising an internal flow tube disposed within the shell, wherein the internal flow tube includes a periphery delimiting a cavity, and the combustion device and the vane mechanism are disposed in the cavity of the internal flow tube, and the external flow tube includes a first end fixed to the internal flow tube and a second end extended out of the shell. 
     
     
         4 . The hot air blower as claimed in  claim 3 , wherein the flow tube includes a cavity extended therethrough from the first end to the second end thereof, and the flame protector is extended in the cavity of external flow tube. 
     
     
         5 . The hot air blower as claimed in  claim 1 , wherein the combustion device is connected with a first fuel line, and the clipping seat includes a heating tube mounted thereon. 
     
     
         6 . The hot air blower as claimed in  claim 5 , wherein the heating tube includes two legs extended separately with one leg connected with the first fuel line and the other leg connected with a second fuel line respectively. 
     
     
         7 . The hot air blower as claimed in  claim 6 , wherein the heating tube is disposed in front of the fan mechanism and aside of the combustion device, and the combustion device is able to give off heat energy to the heating tube and prevent fuel condensed and clogged therein. 
     
     
         8 . The hot air blower as claimed in  claim 6 , wherein the heating tube is disposed outside the clipping seat and adjacent to the plurality of guiding vanes. 
     
     
         9 . The hot air blower as claimed in  claim 6 , wherein the heating tube is disposed in the clipping seat. 
     
     
         10 . The hot air blower as claimed in  claim 1 , wherein the shell includes first and second outer shells symmetrically joined to each other. 
     
     
         11 . The hot air blower as claimed in  claim 10 , wherein the first and second shells include first and second clamping collars disposed therein and holding the internal flow tube fixedly inside the shell. 
     
     
         12 . The hot air blower as claimed in  claim 1 , wherein the fan mechanism includes a fan and a flow-regulating sleeve, encasing the fan. 
     
     
         13 . The hot air blower as claimed in  claim 1 , wherein the shell is substantially T-shaped and includes first and second extensions transverse to each other, and the fan mechanism, the combustion device, the vane mechanism, and the flame protector are disposed in the first section of the shell. 
     
     
         14 . The hot air blower as claimed in  claim 13 , wherein the fuel canister is joined to the second section of and disposed outside the shell. 
     
     
         15 . The hot air blower as claimed in  claim 13 , wherein the fuel canister is joined to the second section of and received in the shell. 
     
     
         16 . The hot air blower as claimed in  claim 3 , wherein the internal and external flow tubes form a plurality of gaps between junctions therebetween. 
     
     
         17 . The hot air blower as claimed in  claim 2 , wherein the flame protector includes a tamer disposed therein, and the flame protector defines an open end and an air exit end, and the tamer is in the form of a tube and includes a plurality of meshes. 
     
     
         18 . The hot air blower as claimed in  claim 1 , wherein the flame protector defines an open end and an air exit end including a plurality of meshes. 
     
     
         19 . The hot air blower as claimed in  claim 18  further comprising an internal flow tube disposed within the shell, wherein the internal flow tube includes a periphery delimiting a cavity, and the combustion device and the vane mechanism are disposed in the cavity of the internal flow tube, and the external flow tube includes a first end fixed to the internal flow tube and a second end extended out of the shell. 
     
     
         20 . The hot air blower as claimed in  claim 1  further comprising an internal flow tube disposed within the shell, wherein the internal flow tube includes a periphery delimiting a cavity, and the combustion device and the vane mechanism are disposed in the cavity of the internal flow tube, and the external flow tube includes a first end fixed to the internal flow tube and a second end extended out of the shell.