JPS6383511A - Liquid fuel combustion apparatus - Google Patents

Abstract

PURPOSE:To keep the running cost low, as well as to lower the manufacturing cost and to make a burner assembly compact in the title combustion apparatus, by providing a vaporizing chamber, surrounding externally the throat which sucks and mixes vaporized fuel with air, separated from a throat external wall at a small gap. CONSTITUTION:A liquid level being fed by a pump 7 through a fuel oil feeding pipe 8 is led into a vaporizing chamber 21 from a fuel inlet port 9. The fuel is vaporized in a moment of time because the inside of a vaporizing cylinder 21 is preheated by an electric heater 2. As the internal pressure in the vaporizing chamber 21 is raised by expansion of fuel by vaporing, the vaporized fuel is injected into a throat 4 from a nozzle 3 via an introducing pipe 23. A jet flow of fuel sucks air into the throat 4 from an opening 13 at the bottom thereof, becoming a mixed gas together with the combustion air, going up to a burner head 5. The air being sucked at that time is at room temperature, so that the inside of the throat 4 is cooled by the air. But the cooling effect to the vaporizing chamber 21 is little because the cylinder 21 is separated by a small gap 50, provided between the outer wall 4' of the throat 4 and the vaporizing chamber 21. Accordingly the electric power consumption by the electric heater 2 in order to keep the vaporizing cylinder at a proper temperature may be saved, as a result the running coat of the title combustion apparatus is maintained low.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid fuel combustion device that vaporizes and burns liquid fuel.

[Conventional technology]

FIG. 3 is a sectional view of a main part of a conventional liquid fuel combustion device.

In the figure, 1 is preheated to 200°C to 30°C by electric heating element 2.
A vaporization chamber heated to a temperature of 0° C., 3 a nozzle for spouting the vaporized fuel vaporized in the vaporization chamber 1, 4 a throat for receiving the vaporized fuel ejected from the nozzle 3, and 5 a burner formed of a wire mesh or the like. The head is fixed on the burner bottom wall 6 provided at the top of the throat 4.

In the above, the vaporization chamber i, the Tt heating body 2. The vaporizing section consisting of the nozzle 3 and the combustion section consisting of the s o - h 4 p burner head 5 are manufactured as completely separate bodies.

F is a pump, which connects the oil tank 12 through the oil supply pipe 8.
The liquid fuel inside is supplied to the vaporization chamber 1 from the fuel supply port 9.

A thermistor 10 detects the temperature of the vaporizing chamber, and the temperature of the vaporizing chamber is controlled to a predetermined temperature by this thermistor.

11 opens and closes the nozzle 3, and when the nozzle 3 is closed, it forms an i-path that communicates the inside of the vaporization chamber 1 with the inside of the oil tank 12, and when the nozzle 3 is open, it is closed. This is a solenoid valve with a jp product structure.

Next, the operation will be explained. When the inside of the vaporization chamber 1 reaches a temperature at which the fuel can continue to be sufficiently vaporized by the electric heating element 2,
The pump valve is actuated 17 and the nozzle 3 is opened, and the fuel supplied into the vaporization chamber 1 through the fuel supply pipe 8 is instantaneously vaporized and ejected toward the throat 4.

At this time, air is sucked through the lower opening 13 of the throat 4 by the ejection force of the vaporized fuel, becomes an air-fuel mixture in the throat 4, reaches the space 14, and is appropriately ignited to form a flame 15.

[Problem that the invention seeks to solve]

In the conventional combustion device as described above, the combustion part having the throat 4 and the burner head 5 and the vaporization part having the vaporization chamber 1 and the nozzle 3 have completely separate element configurations, so the cost is relatively high. At the same time as it becomes a thing,
There were nm points where space loss was large.

This invention was made in order to solve the above-mentioned problems of the conventional M4, and aims to provide a liquid combustion device that can reduce costs and save space, as well as keep running costs low. .

[Means for solving problems]

The liquid fuel combustion device according to the present invention has a vaporization chamber disposed around the outer circumference of a throat through which vaporized fuel and air are sucked and mixed, with a small gap being separated from the outer circumferential wall of the throat.

[Effect]

In this invention, since the vaporization chamber is provided using the empty space around the throat, space is saved in manufacturing the combustion device, and cost can be reduced.

Further, since the vaporization chamber is provided with a small gap from the outer circumferential wall of the throat, the cooling effect of the jet stream during combustion is not exerted on the vaporization chamber.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 21 is a vaporization chamber, and the outer peripheral wall 4' of the throat 4
It has a bottomed hollow annular shape with a small 11XR50 spaced apart from the periphery thereof, and the upper opening is closed by a lid body 22. This lid body 22 also serves as the bottom wall of the burner, and the burner head 5 is mounted on it! ! Fix it.

Reference numeral 23 denotes a vaporized fuel outlet pipe, one end of which is connected to the vaporization chamber 21 and the other end connected to the nozzle 3. Note that the same reference numerals as in FIG. 3 indicate the same or corresponding parts.

Next, the operation of this embodiment configured as described above will be explained.

The liquid fuel sent to Bonpouf through the fuel supply pipe 8 is preheated from the fuel supply port 9 to 200°C to 3°C by the electric heating element 2.
When entering the vaporization chamber 21 heated to a temperature of 00° C., it is instantaneously vaporized.

When the internal pressure increases due to vaporization and expansion, the vaporized fuel is ejected from the nozzle 3 into the throat 4 through the outlet pipe 23.
The lower opening 13 of the throat 4 transports air with the jet stream.
The mixture is drawn into the gas mixture and reaches the burner head 5.

The air sucked in at that time is at room temperature, so the inside of the throat 4 is cooled.

However, according to the configuration of this embodiment, since the vaporization chamber 21 is formed with a small gap 50 between it and the outer circumferential wall 4' of the throat 4, the cooling effect is limited to the cooling of the vaporization chamber 21. has little impact.

Therefore, the amount of increase in the energization rate to the heating element 2 to maintain the vaporization chamber 21 at an appropriate temperature can be reduced, and running costs can be kept low.

〔Effect of the invention〕

As described above, according to the present invention, the vaporization chamber is provided around the outer periphery of the throat that mixes vaporized fuel and air for ophthalmic purposes, with a small gap separated from the outer circumferential wall of the throat. It is possible to reduce costs and save space in the combustion section and vaporization section, and to minimize the effect of the cooling effect of the jet stream on the vaporization chamber, making it possible to obtain a combustion device with low running costs and low electricity supply to the electric heating element. .

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a liquid fuel combustion device showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the I-JT style in Fig. 1,
FIG. 3 is a sectional view of a conventional example. In the figure, 3 is a nozzle, 4 is a throat, 4' is its outer peripheral wall, 5 is a combustion burner head, 21 is a vaporization chamber, 23
5 is a vaporized fuel outlet pipe, and 50 is a small gap. Agent Masuo Oiwa (2 others) 1st eye 2 Kanga 3 fixed procedure amendment (voluntary) Showa Convex 1v 27th

Claims (1)

[Claims] In a liquid fuel combustion device in which a combustion burner head is provided at the upper part of a throat that sucks and mixes vaporized fuel ejected from a nozzle and external air, on the outer periphery of the throat,
A liquid fuel combustion device characterized in that a vaporization chamber is provided at a small gap from the outer circumferential wall forming the throat, and vaporized fuel vaporized in the vaporization chamber is guided to the nozzle.