Portable no-pump multi-fuel stove

Abstract

Disclosed is a portable no-pump multi-fuel stove that may use gasoline and butane together. Butane gas is injected above gasoline in the fuel tank so that the butane gas is combusted at an initial ignition stage, thereby eliminating the need of preheating resulting from incomplete combustion of gasoline at an initial ignition stage in a conventional gasoline stove. Once a certain amount of butane is combusted, though butane is not supplied, gasoline is continuously inhaled, vaporized and injected by means of vapor pressure in the fuel tank and osmotic pressure of the inhaling member without any gasoline pressuring work. The nozzle is not easily separated but easily exchanged. The gas discharge hole is formed downward at one side of the fuel injection hole. The inhaling member is filled to a middle portion of the entire length of the preheating tube so that the stove has small and light structure.

1 . A portable no-pump multi-fuel stove, in which a burner bowl ( 5 ) acting as a windscreen, a flame hole ring ( 6 ) where at least one ply of a flat flame hole ring and a flame hole ring with a V-shaped groove are accumulatively assembled, and a burner cap ( 7 ) are subsequently assembled to a central upper portion of a fuel tank ( 4 ) having a cylindrical shape with a fuel injection hole ( 2 ) to which a fuel cap ( 1 ) is combined so that a tripod ( 3 ) is attached to an outer side of the fuel tank ( 4 ), a gas injection hole ( 1   a ), a check valve ( 1   b ) and a safety valve ( 1   c ) are installed to a side upper portion of the fuel tank ( 4 ), a preheating tube is installed to traverse an upper portion of the burner bowl ( 5 ), a flame control valve ( 10 ) having a nozzle ( 9 ) is formed at a front end of the preheating tube, and the flame control valve ( 10 ) is connected to a guide tube ( 11 ) having a front end fixed to an inner bottom of the burner bowl ( 5 ), 
 wherein the gas injection hole ( 1   a ), the check valve ( 1   b ) and the safety valve ( 1   c ) are installed to an inside of the fuel cap ( 1 ),    wherein the preheating tube is composed of a dual preheating tube ( 8 ) so that a gas tube ( 13 ) having a predetermined diameter is inserted in the dual preheating tube ( 8 ), one end of the gas tube ( 13 ) being communicated with an upper space of the fuel tank ( 4 ), the other end of the gas tube ( 13 ) being communicated with the flame control valve ( 10 ),    wherein an inhaling member ( 14 ) is filled into a space out of the gas tube ( 13 ) within the dual preheating tube ( 8 ) so as to be contacted with an inner bottom of the fuel tank ( 4 ),    wherein a rod ( 28 ) for supporting the burner cap and transferring heat is penetrated into an upper inside of the fuel tank ( 4 ) so that at least one heat sink ( 29 ) is attached to the rod ( 28 ) in multi stages at suitable intervals.    
   
   
       2 . A portable no-pump multi-fuel stove according to  claim 1 , 
 wherein the heat sink ( 29 ) has a smooth plate shape or a waved shape that gives a relatively larger heat emitting area.    
   
   
       3 . A portable no-pump multi-fuel stove according to  claim 1 , 
 wherein the heat sink ( 29 ) is made of copper or alloys thereof.    
   
   
       4 . A portable no-pump multi-fuel stove according to  claim 1 , 
 wherein a control valve support ( 15 ) whose lower end is contacted with an upper outer surface of the fuel tank ( 4 ) and upper end is contacted with an outer bottom of the burner bowl ( 5 ) is integrally installed to a rear end of the guide tube ( 11 ).    
   
   
       5 . A portable no-pump multi-fuel stove according to  claim 1 , 
 wherein a filter ( 16 ) for removing impurities is installed to an end of the inhaling member ( 14 ) toward the flame control valve ( 10 ).    
   
   
       6 . A portable no-pump multi-fuel stove according to  claim 1 , 
 wherein the inhaling member ( 14 ) is made of one selected from the group consisting of silicate fabric woven with silicate yarns, metal fabric composed of a plurality of metal fibers, glass fiber and rock wool.    
   
   
       7 . A portable no-pump multi-fuel stove according to  claim 1 , 
 wherein the fuel injection hole ( 2 ) has a gas discharge hole ( 2   a ) additionally formed in one side positioned in a lower portion so that a high pressure gas in the fuel tank ( 4 ) is discharged downward toward the ground when the fuel cap ( 1 ) is separated after the stove is used.    
   
   
       8 . A portable no-pump multi-fuel stove according to  claim 1 , 
 wherein the dual preheating tube ( 8 ) has a diameter that is constant over the entire length, or that is greatest at a portion toward the fuel tank ( 4 ) and gradually decreased toward the flame control valve ( 10 ).    
   
   
       9 . A portable no-pump multi-fuel stove according to  claim 1 , 
 wherein the inhaling member ( 14 ) filled in the outer space of the gas tube ( 13 ) within the dual preheating tube ( 8 ) is filled from an inner bottom of the fuel tank ( 4 ) up to a top of an overall length of the dual preheating tube ( 8 ) or up to a middle portion.    
   
   
       10 . A portable no-pump multi-fuel stove according to  claim 1 , wherein the flame control valve ( 10 ) includes: 
 a pipe having a screw on an inside of one end thereof;    a body ( 30 ) positioned in the pipe to be screwed to the screw of the pipe, the body ( 30 ) having a large diameter portion ( 34 ) at a middle portion so that an end of the inhaling member ( 14 ) toward the flame control valve ( 10 ) is opened or closed when the body ( 30 ) moves right or left; and    a detachable nozzle cleaning device ( 31 ) screwed to the other end of the body ( 30 ) and having a nozzle hole and an inner space so that the nozzle ( 9 ) is detachably mounted to the nozzle hole and the inner space,    wherein the nozzle ( 9 ) has one end bent so that the bent end is positioned in the inner space of the detachable nozzle cleaning device ( 31 ), and the nozzle ( 9 ) has the other end protruded through the nozzle hole so that the screwed detachable nozzle cleaning device ( 31 ) is not separated from the body ( 30 ) of the flame control valve ( 10 ).    
   
   
       11 . A portable no-pump multi-fuel stove according to  claim 10 , 
 wherein the pipe of the flame control valve ( 10 ) is configured so that one end thereof is enlarged more than the other end, whereby a bushing ( 32 ), a gasket seal ( 33 ) and a packing fastening bolt ( 10   a ′) are put around the body ( 30 ) to fill the space formed around the body ( 30 ) for the purpose of keeping an airtight and waterproof state.