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.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a portable no-pump multi-fuel stove in which a gasoline injection hole is devised to have multi functions so as to enable injection of butane as well as gasoline and also to act as a check valve and a safety valve in combination. [0003] In addition, a preheating tube installed to traverse an upper portion of a burner bowl has a dual structure so that a gas tube with small diameter is inserted into the preheating tube as a gas passage and an inhaling member is put into a space out of the preheating tube. [0004] Thus, gas is injected into the preheating tube and fuel in a liquid state is injected out of the preheating tube. Multiple heat sinks are provided to an inner upper end of a fuel tank at intervals so that conductive heat of the burner bowl may directly heat the inner upper end of the fuel tank. [0005] Thus, a pressure of the expanded gas allows fuel to be continuously injected ...

AI Technical Summary

Benefits of technology

[0014] The present invention is designed to solve the problems of the prior art, and therefore an object of the invention is to provide a portable stove using both gasoline and gas without a pump, which may be used as a gasoline stove or a gas stove as required by making a preheating tube in a dual structure, eliminate a preheating process and resultant unnecessary energy consumption by injecting and combusting butane gas at an initial ignition state when being used as a gasoline stove, and also allow a fuel to keep vaporized and injected without any pressuring work after ignition.

[0015] Another object of the invention is to provide a portable stove using both gasoline and gas without a pump, in which a plurality of heat sinks heated by heat conducted from a heating unit are multiply installed at intervals so that an inner gas in a fuel tank is expanded using a heat radiated from the heat sinks and thus an air pressure is increased, thereby not requiring any separate pressuring work and ensuring good combustion.

[0017] Further another object of the invention is to provide a portable stove using both gasoline and gas without a pump, which may prevent accidents by configuring so that a high temperature gas in the fuel tank is discharged downward toward the ground when a fuel cap is separated from the stove after the stove is used.

[0026] Therefore, the stove of the present invention may use gasoline and butane together. In particular, butane gas is injected into the fuel tank in a region above gasoline so that the butane gas is combusted at an initial ignition stage, thereby eliminating the need of preheating that results from incomplete combustion of gasoline at an initial ignition stage in a conventional gasoline stove.

[0028] In addition, the present invention ensures the nozzle to be not easily separated but easily exchanged. Moreover, the gas discharge hole is formed downward at one side of the fuel injection hole, and the inhaling member is filled to a middle portion of the entire length of the preheating tube, so that the portable multi-fuel stove may have small and light structure.

Problems solved by technology

However, the petroleum stove needs a preparation tool for preheating such as a preheating torch and alcohol, which is so cumbersome.

In addition, due to high risks in preheating, the petroleum is gradually used not so often.

However, the gas stove gives small energy output in comparison to volume of liquefied butane, and its flame is easily extinguished by wind.

In addition, due to the high evaporation point (e.g., −0.5° C. for butane), fuel is not sprayed in below-zero temperature, so it can be hardly used in the winter unless a separate heating device is attached thereto.

Moreover, propane gas is not suitable for a portable stove since it requires very strong container to endure pressure due to its too low evaporation point (−40° C.).

However, a conventional gasoline stove has a problem that a preheating tube is insufficiently heated at an initial ignition so that gasoline is incompletely combusted in a liquid state.

Thus, the gasoline stove should endure an unnecessary preheating process, which causes generation of black dirt and spreading of red flame, until the preheating tube is sufficiently preheated to reach a complete combustion state at which gasoline is vaporized and gives flue flame.

Furthermore, the pump increases weight of the stove and is also not preferable in an economic view since it is a factor of price increase by about 20 to 30%.

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