JPH064183Y2 - Liquid fuel combustion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a liquid fuel combustion apparatus used in, for example, an oil heater, an oil boiler, and the like, and in particular, an improvement of a mixing chamber for mixing the vaporized fuel with external air. It is a thing.

[Conventional technology]

 FIG. 3 shows a cross-sectional view of a main part of a conventional liquid fuel combustion device.

In the figure, 1 is a fuel tank, 2 is an oil supply pump, 3 is an oil supply pipe, 4 is a vaporization chamber, 5 is an oil supply port, 6 is a nozzle, 7 is a nozzle hole, 8 is an electromagnetic solenoid, 9 is a return pipe, 10
Is a communication hole, 11 is a throat, 12 is a cover plate, 13 is a burner head, 13a is a mixing chamber, 13b is a flame hole surface, 13c is a mounting surface, 14 is a throat outlet, 15 is a heater, 16 is a temperature sensor, 17 is Needle, 18 is throat inlet, 2
0 is a mounting screw.

An oil supply pump 2 is attached to the upper surface of the fuel tank 1, and one end of an oil supply pipe 3 is connected to the oil supply pump 2. The other end of the oil supply pipe 3 is connected to an oil supply port 5 which is projected into the vaporization chamber 4.

The nozzle 6 has a nozzle hole 7 at one end thereof so as to face the throat inlet 18, and one end of a return pipe 9 is fixed at the other end. The other end of the return pipe 9 is the electromagnetic solenoid 8
The electromagnetic solenoid 8 opens and closes the nozzle hole 7 by driving the needle 17.

The nozzle 6 is communicated with the vaporization chamber 4 through a communication hole 10, and the throat 11 is formed by a hollow portion provided so as to penetrate substantially the center of the vaporization chamber 4, and its upper end and lower end are open.

The cover plate 12 is fixed to the upper portion of the vaporization chamber 4 by means such as welding.

The burner head 13 has an attachment surface 13c attached to the upper portion of the cover plate 12 with attachment screws 20 to cover the throat outlet 14 to form a mixing chamber 13a and a flame hole surface 13b.
have.

Next, the operation will be described.

When the heater 15 is energized, the vaporization chamber 4 is heated. When the temperature in the vaporization chamber 4 reaches 200 to 300 ° C,
It is detected by the temperature sensor 16. This temperature sensor 1
Refueling is performed by the refueling pump 2 according to the detection of 6, and fuel is supplied through the refueling pipe 3.

The refueled fuel is dropped from the refueling port 5 into the vaporization chamber 4 to be heated and vaporized, and along with this, the electromagnetic solenoid 8
The needle 17 is driven by and the nozzle hole 7 is opened. As a result, the vaporized fuel is jetted from the nozzle hole 7 toward the throat inlet 18, and the kinetic energy of this jet sucks air from the throat inlet 18,
This sucked air together with vaporized fuel causes throat 11
It is introduced into the mixing chamber 13a through the inside and mixed.

The air-fuel mixture produced in this way is discharged from the flame hole surface 13b on the outer periphery of the burner head 13, and when the air-fuel mixture is ignited, a combustion flame 19 is generated, and thereafter, the fuel gas is continuously sent to burn. Is maintained.

[Problems to be solved by the invention]

In the liquid fuel combustion device described above, in order to obtain proper blue combustion, it is necessary to make the mixing ratio of the air amount and the vaporized fuel appropriate, and for that purpose, the length of the throat 11 is set to a predetermined length. The above must be secured.

On the other hand, in order to make the vaporizing chamber 4 compact by shortening the preheating time, the throat 11 projects into the mixing chamber 13a.

However, considering the pressure loss at the throat outlet 14,
The facing distance between the burner head 13 and the throat outlet 14 must be at least l ₁ .

Therefore, the burner head 13 becomes large and the mounting screw 2
As 0 becomes longer, the assembling workability becomes worse.

As described above, there is a problem that the cost becomes high due to the reduction of work efficiency.

The present invention has been made to solve the above-mentioned problems, and a liquid fuel combustion that can secure a sufficient distance between the burner head and the throat outlet, improve the assembly workability, and reduce the manufacturing cost. The purpose is to obtain the device.

[Means for solving problems]

A liquid fuel combustion apparatus according to the present invention includes a vaporization chamber that vaporizes liquid fuel, a jet nozzle that jets vaporized vaporized fuel, and a throat that guides vaporized fuel and external air to a mixing chamber.
A burner head for burning vaporized fuel is provided, and an outlet of the throat is provided so as to project into the mixing chamber, and a bulge portion is formed at a portion of the burner head facing the throat outlet, and around the bulge portion. It is provided with a mounting surface.

[Action]

In the liquid fuel combustion apparatus according to this invention, the burner head facing the throat outlet projecting into the mixing chamber is provided with the bulging portion, so that a sufficient distance from the throat outlet can be secured.

Also, by providing a mounting surface around the bulging portion,
It is possible to lower the screw mounting portion and the flame hole portion, so that the assembling workability is good, and the cost and the size can be reduced.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an essential part of a liquid fuel combustion apparatus according to an embodiment of the present invention. The structure and operation are basically the same as those of the conventional liquid fuel combustion apparatus shown in FIG. The differences are as follows.

Reference numeral 13d denotes a bulging portion formed by drawing on the top surface of the burner head 13, which secures a distance l ₁ from the throat outlet 14 and is provided around the bulging portion 13a.
And the flame hole surface 13b is made low.

In this embodiment, as described above, the bulging portion 13d is formed in the portion of the burner head 13 facing the throat outlet 14 as compared with the conventional one, and the mounting surface 13c and the flame hole surface 13b are formed.
As a result of lowering, without changing the amount of intake air,
The mounting screw 20 can be shortened, the assembling workability is good, and the cost can be reduced.

[Effect of device]

As described above, according to the present invention, the bulging portion is formed by drawing the burner head portion facing the throat outlet, and the mounting surface is provided around the bulging portion. Since the flame surface can be lowered, the assembling workability can be improved, and the cost of an oil heater or an oil boiler equipped with this device can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an essential part showing an embodiment of a liquid fuel combustion apparatus according to the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a cross-sectional view of an essential part of a conventional liquid fuel combustion apparatus. Is a plan view of the same. In the figure, 4 is a vaporization chamber, 6 is a nozzle, 11 is a throat, and 13 is.
Is a burner head, 13a is a mixing chamber, 13d is a bulge,
14 is the throat exit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Fumikichi Futami Inventor Fumiyoshi Futami 800 Iwamatsu, Oshima-cho, Nitta-gun, Gunma Ryoden Engineering Co., Ltd. Tokyo Office Gunma Branch (56) Reference JP 62-166211 (JP) , A)

Claims (1)

[Scope of utility model registration request] 1. A vaporization chamber for vaporizing liquid fuel, an ejection nozzle for ejecting vaporized fuel vaporized in the vaporization chamber, and a throat for guiding the vaporized fuel and external air ejected from the ejection nozzle to a mixing chamber. And a burner head for burning the vaporized fuel mixed with the external air in the mixing chamber, the outlet of the throat is provided so as to project into the mixing chamber, and the portion of the burner head facing the throat outlet is expanded. A liquid fuel combustion apparatus, characterized in that a protruding portion is formed and a mounting surface is provided around the protruding portion.