JPH06265116A - Combustion device - Google Patents

Abstract

PURPOSE:To prevent an inside part of a pre-heating pipe for forcedly gasifying fuel from being clogged with carbon in a combustion device using a cartridge type liquified gas bomb 4. CONSTITUTION:A preheating pipe is comprised of an outer pipe 17 having its one end closed and an inner pipe 16 inserted into the outer pipe 17 from the other end side with a predetermined space being left in it. The other end of the inner pipe 16 is connected to a fuel passage at an adjusting valve 7 for use in adjusting an amount of supplying fuel and then the other end of the outer pipe 17 is connected to a fuel passage at a flame port.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus using a cartridge type liquefied petroleum gas cylinder for convenient refueling.

[0002]

2. Description of the Related Art A combustion device using a cartridge type liquefied petroleum gas cylinder is a stove, a grass burner, a torch,
It is used for stoves.

In this type of combustion apparatus, a crater is detachably attached to a fuel outlet of a cartridge type liquefied petroleum gas cylinder by a holder, and a fuel supply amount is provided in the middle of a fuel passage connecting the crater and the fuel outlet. It has a structure with a control valve for adjusting.

Further, in this type of combustion apparatus, a part of the fuel passage between the control valve and the crater is made into a preheating tube located near the crater, and the preheating tube is used to forcibly vaporize the fuel, thereby making it more powerful. Some have been designed to get a good firepower.

[0005]

However, since the preheating tube is conventionally formed of a thin tube, when the thin tube is burnt, carbon is generated in the thin tube and the thin tube is clogged, resulting in insufficient fuel supply. There was a problem.

Therefore, the present invention is intended to provide a combustion apparatus having a preheating tube in which the problem of poor fuel supply due to generation of carbon is unlikely to occur.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a preheating tube with an outer tube whose one end is closed, and a predetermined gap from the other end side of the outer tube. It is constituted by an inner pipe inserted by opening, the other end of the inner pipe is connected to the fuel passage on the adjusting valve side, and the other end of the outer pipe is connected to the fuel passage on the crater side.

[0008]

[Function] The fuel in the cartridge type liquefied petroleum gas cylinder passes through the control valve from the fuel outlet, enters into the inner pipe from the other end of the inner pipe, passes through the inner pipe, and is discharged from the opening at one end of the inner pipe to the outer pipe. It enters the gap between the inner tube and the outer tube and is supplied to the crater from the other end.

The fuel is preheated and forcedly vaporized while passing through the inner pipe and the outer pipe.

When the preheating pipe is formed by the inner and outer double pipes as described above, the inner pipe is inserted into the outer pipe with a predetermined gap, so that even if the outer pipe is burnt, the inner pipe is burnt. Since it does not exist, carbon is less likely to be generated in the inner pipe, and even if the inner pipe is thin, the inner pipe is not clogged with carbon.

Since the outer tube is covered with a predetermined gap on the outer side of the inner tube, the outer tube has a larger diameter than the inner tube. Therefore, even if carbon is generated inside the outer tube, the outer tube is not clogged.

[0012]

1 and 2 show an example in which the combustion apparatus according to the present invention is applied to a weeding burner, and this weeding burner has the following structure.

A cartridge type liquefied petroleum gas cylinder 4 is detachably attached to a rear end of an outer cylinder 1 having a crater 2 at its tip through a holder 3. A grip 5 is attached to the rear portion of the outer cylinder 1 so that its length can be adjusted.

At the rear end of the outer cylinder 1, there is provided a control valve 7 which is connected to the fuel outlet 6 of the liquefied petroleum gas cylinder 4 and which controls the amount of fuel supplied. This control valve 7
The needle 1 in the fuel passage 9 formed in the valve body 8.
0 is provided, and the opening of the fuel passage 9 is adjusted by the needle 10, and the needle 10 is adjusted by the handle 11.

A fuel chamber 12 is provided in front of the valve body 8.
The nozzle mounting member 13 is mounted via. A nozzle 14 and an inner cylinder 15 that surrounds the nozzle 14 are installed on the front surface of the nozzle mounting member 13.

Between the inner cylinder 15 and the outer cylinder 1, the inner pipe 1 is provided.
A preheating tube consisting of a double tube of 6 and an outer tube 17 is installed. The tip of the outer tube 17 is closed and located at the crater 2 portion. The rear end of the outer pipe 17 is connected to a fuel passage 18 formed inside the nozzle mounting member 13 so that the outer pipe 17 and the nozzle 14 are communicated with each other. Outer tube 1
An inner pipe 16 is inserted into the inside of the valve 7 with a predetermined gap, and the rear end of the inner pipe 16 has a valve body 8 and a nozzle mounting member 1.
3 communicates with a fuel chamber 12 formed between them.

Therefore, the fuel in the liquefied petroleum gas cylinder 4 is supplied to the nozzle 14 through the following route.

That is, the fuel in the liquefied petroleum gas cylinder 4 is
From the fuel outlet 6 of the liquefied petroleum gas cylinder 4 to the control valve 7
To enter the fuel chamber 12, pass through the inner pipe 16,
6 through the gap between the outer pipe 17 and the nozzle mounting member 1
It reaches the nozzle 14 through the fuel passage 18 of No. 3. Then, the fuel is forcibly vaporized while passing through the inner pipe 15 and the outer pipe 17, and is vigorously ejected from the nozzle 14.

In FIG. 2, reference numeral 19 indicates an electrode for ignition.

[0020]

As described above, according to the present invention, by constructing the fuel preheating pipe by the inner and outer double pipes,
It is possible to prevent the fuel supply failure due to the clogging of carbon in the preheating pipe. Further, since the liquefied fuel passes through the thin inner pipe and the vaporized fuel passes through the outer thick outer pipe, the change in the liquefied petroleum gas cylinder is unlikely to directly affect the nozzle, and the combustion state is stabilized. There is also.

[Brief description of drawings]

FIG. 1 is an overall view showing an example in which a combustion device according to the present invention is applied to a grass-burning burner.

FIG. 2 is a partial detailed sectional view of the above.

[Explanation of symbols]

 1 Outer Cylinder 2 Crater 3 Holder 4 Liquefied Petroleum Gas Cylinder 5 Grip 6 Fuel Outlet 7 Control Valve 8 Valve Body 9 Fuel Passage 10 Needle 11 Handle 12 Fuel Chamber 13 Nozzle Mounting Member 14 Nozzle 15 Inner Cylinder 16 Inner Tube 17 Outer Tube 18 Fuel Passage 19 electrode

Claims (1)

[Claims] 1. A fuel outlet of a cartridge type liquefied petroleum gas cylinder is detachably attached to a fuel outlet by a holder, and in the middle of a fuel passage connecting the fuel outlet and the fuel outlet.
In a combustion device in which a regulating valve for regulating the amount of fuel supply is provided, and a part of the fuel passage between the regulating valve and the crater is formed by a preheating pipe located near the crater, one end of the preheating pipe is blocked. Outer pipe and an inner pipe inserted from the other end side of the outer pipe into the outer pipe with a predetermined gap. The other end of the inner pipe is connected to the fuel passage on the adjusting valve side to form an outer pipe. Combustion device characterized in that the other end thereof is connected to the fuel passage on the crater side.