Handheld burning device

Abstract

A handheld burning device includes a diversion mechanism, a nozzle connected to the diversion mechanism, a mixing inner tube arranged adjacent to an outlet of the nozzle, an ignition mechanism, and a metal outer tube that is sleeved around the mixing inner tube. The outlet of the nozzle has an aperture being within a range from 0.17 mm to 0.19 mm, an inner diameter of the mixing inner tube is within a range from 28 times to 33 times of the aperture, a length of the mixing inner tube is within a range from 60 mm to 100 mm, and a length of the metal outer tube is greater than the length of the mixing inner tube and is within a range from 90 mm to 140 mm.

What is claimed is: 
     
         1 . A handheld burning device, comprising:
 a diversion mechanism having a flow channel therein, wherein the diversion mechanism is configured to be detachably connected to a fuel tank for allowing one end of the flow channel to be in spatial communication with the fuel tank;   a nozzle connected to the diversion mechanism and being in spatial communication with another end of the flow channel, wherein an outlet of the nozzle has an aperture being within a range from 0.17 mm to 0.19 mm;   a mixing inner tube having two ends that are respectively defined as a first end and a second end, wherein the first end is arranged adjacent to the outlet of the nozzle, and wherein an inner diameter of the mixing inner tube is within a range from 28 times to 33 times of the aperture, and a length of the mixing inner tube is within a range from 60 mm to 100 mm;   an ignition mechanism having an ignition end and a manipulation end, wherein the ignition end is arranged adjacent to the second end of the mixing inner tube, and the manipulation end is arranged away from the second end of the mixing inner tube; and   a metal outer tube sleeved around the mixing inner tube, wherein the second end of the mixing inner tube is arranged in the metal tube, and wherein a length of the metal outer tube is greater than the length of the mixing inner tube and is within a range from 90 mm to 140 mm.   
     
     
         2 . The handheld burning device according to  claim 1 , wherein the diversion mechanism includes:
 a metal frame carrying the nozzle, the mixing inner tube, the ignition mechanism, and the metal outer tube;   a copper valve assembled to the metal frame and being configured to be threadedly connected to the fuel tank; and   a diversion pipe, wherein one end of the diversion pipe is connected to the metal frame to jointly define the flow channel, another end of the diversion pip is connected to the nozzle, and a length of the diversion pipe is at least two times of the length of the mixing inner tube.   
     
     
         3 . The handheld burning device according to  claim 2 , wherein the copper valve is fixed to the metal frame in a riveted manner, and a height of the copper valve is within a range from 20 mm to 25 mm. 
     
     
         4 . The handheld burning device according to  claim 2 , wherein the copper valve is fixed to the metal frame through structural engagement, and a height of the copper valve is within a range from 10 mm to 15 mm. 
     
     
         5 . The handheld burning device according to  claim 2 , wherein the diversion pipe includes:
 a first flow segment extending from the metal frame toward the second end of the mixing inner tube;   a second flow segment extending from the nozzle toward the second end of the mixing inner tube, wherein the first flow segment is arranged adjacent to the first flow segment; and   a turning gasification segment arranged adjacent to the ignition end of the ignition mechanism, wherein the first flow segment and the second flow segment are connected to the turning gasification segment so as to be in spatial communication with each other.   
     
     
         6 . The handheld burning device according to  claim 5 , wherein the turning gasification segment protrudes from the mixing inner tube and is arranged in the metal outer tube, and a central angle of the turning gasification segment with respect to a central axis of the metal outer tube is within a range from 15 degrees to 90 degrees. 
     
     
         7 . The handheld burning device according to  claim 2 , further comprising a housing that covers the diversion mechanism and the nozzle and that has a plurality of thru-holes, wherein the metal frame has a mixing chamber accommodating a part of the nozzle and the first end of the mixing inner tube, and wherein the mixing chamber has a plurality of openings, and an interior space of the mixing chamber is in spatial communication with an external space through the openings and the thru-holes. 
     
     
         8 . The handheld burning device according to  claim 1 , wherein the mixing inner tube includes:
 a transmission tube body, wherein the first end of the mixing inner tube is arranged on the transmission tube body; and   an ignition head assembled to the transmission tube body, wherein the second end of the mixing inner tube is arranged on the ignition head, and an inner diameter of the ignition head is within a range from 80% to 95% of an inner diameter of the transmission tube body.   
     
     
         9 . The handheld burning device according to  claim 8 , wherein the ignition head has:
 a main flame channel arranged along an axial direction of the transmission tube body, wherein the main flame channel and the transmission tube body are in spatial communication with each other; and   a plurality of pilot flame channels surrounding the main flame channel and respectively arranged along radial directions of the transmission tube body, wherein the pilot flame channels and the transmission tube body are in spatial communication with each other;   wherein the ignition end of the ignition mechanism is arranged adjacent to an extension path of at least one of the pilot flame channels.   
     
     
         10 . The handheld burning device according to  claim 8 , further comprising a ceramic tube having:
 an inner channel sleeved around the ignition head, wherein the ignition head and the metal outer tube are separated from each other through the ceramic tube;   a first channel, wherein at least part of the first channel is in spatial communication with the inner channel, and the ignition end is arranged in the first channel; and   a second channel, wherein at least part of the second channel is in spatial communication with the inner channel, and a part of the flow channel is arranged in the second channel.