JPS5833369Y2 - vaporizing burner - Google Patents

Description

[Detailed explanation of the invention] The present invention is capable of converting the fuel into moist gas at an appropriate concentration even if liquefied fuel flows into the gas chamber due to cooling of the combustion tube during the transition from raw combustion to vaporization combustion. The present invention relates to a vaporizing burner that can perform vaporization combustion after a green flame state in which red flame is not mixed with hot gas filling a gas chamber.

Conventionally, a combustion plate having a large number of flame holes is arranged in a combustion cylinder with an open flame nozzle at one end, and gas is formed between them. A rotary vaporizing cylinder is provided correspondingly, and a moisture-absorbing material is arranged on the inner surface of the lower part of the gas chamber to absorb moisture from the raw fuel. A raw fuel spill prevention device for a kerosene vaporizing burner that evaporates and vaporizes the raw fuel without leaking into the kerosene and burns the raw fuel is well known, having been described in, for example, Japanese Utility Model Application Publication No. 50-146117 prior to this application.

By the way, in conventional devices of this kind, the moisture absorbent material installed to prevent the raw fuel from flowing out had a structure in which the entire surface was open without covering the top surface of the moisture absorbent material. The absorbed fuel is evaporated all at once from the entire surface by the heating effect of combustion heat, and the dense vaporized gas that is generated is combusted by fumarole from the nozzle hole without stirring and mixing with the humid gas that is successively injected into the gas chamber. As a result, red flame due to incomplete combustion is inevitably mixed into the blue flame, and the purpose of vaporization combustion after a complete blue flame state from the start of vaporization combustion cannot be achieved, and vaporization combustion continues. In some cases, there was no fuel supply to the hygroscopic material, which caused the hygroscopic material to burn out, making it impossible to use it for a long period of time.

In view of the above, the present invention has been developed by disposing a combustion disk having a large number of flame holes in a combustion tube with an open flame nozzle at one end and forming a gas chamber between them. The opening end of the blower cylinder is facing inside, and a rotating vaporizing cylinder is provided correspondingly.
Even if the fuel is automatically vaporized and burned rather than raw combustion, there is a blind liquefied fuel flow stop plate in the force chamber whose tip end is installed in the combustion tube on the nozzle side to block it. is arranged along the combustion tube to define a bag-shaped liquefied fuel evaporation chamber between the inner surface of the combustion tube and the liquefied fuel flow stop plate, and the base end side of the liquefied fuel evaporation chamber communicates with the gas chamber. Even if a situation occurs in which liquefied fuel flows into the gas chamber due to cooling of the combustion cylinder when the combustion cylinder is opened, the fuel will not accidentally flow out to the outside or will be stored in the liquefied fuel evaporation chamber without being combusted. At the same time, the stored liquefied fuel is gradually evaporated and vaporized by the combustion heating action, and the generated vaporized gas is spouted into the gas chamber from the proximal opening of the liquefied fuel evaporation chamber at any time, and is combined with the mixed gas pressurized into the gas chamber. By stirring and mixing the mixture thoroughly, the mixed gas with the appropriate concentration is combusted through the fumarole from the fumarole hole, which not only reliably prevents the red flame from mixing with the green flame, but also eliminates the use of any burnt-out parts. By that,
The present invention is intended to provide a vaporizing burner capable of repeating the above-mentioned action over a long period of time, and the structure of the present invention will be described below with reference to a preferred embodiment shown in the drawings.

In the drawing, reference numeral 1 indicates a combustion section of a vaporizing burner, and this combustion section 1 is connected to one side of a burner main body case 1', and a rotating shaft 2 of a motor built in the burner main body case 1' is connected to the above-mentioned one. It extends toward the combustion section 1.

Reference numeral 3 denotes a bottomed cylindrical combustion tube, one end of which is an open flame nozzle 4, a combustion disk 5 is disposed within the combustion tube 3, and a gas chamber 6 is arranged between them. is formed.

A large number of flame holes 7 are bored in the combustion disk 5.

Reference numeral 8 denotes a blower tube, which passes through the bottom of the combustion tube 3 and opens toward the front, and its base end side is connected to the burner main body case 1'.

9 is a plurality of air supply ports.

Further, 10 is a rotary vaporizing cylinder with one side open, and this rotary vaporizing cylinder 10 is directly connected to the tip of the rotating shaft 2.
The opening of the blower tube 8 is deeply inserted into the rotary vaporizer tube 10 and covered, and the mixed gas passage 1
1 is formed.

A fuel diffuser 12 is attached to the inner bottom of the rotary vaporizing cylinder 10, and this fuel diffuser 12 faces the open end of the blast cylinder 8.

A fuel scattering section 13 extending outward is formed on the open side of the rotary vaporization cylinder 10, and a rotating inner wall 14 extending inward is integrally formed with this fuel scattering section 13, and the rotating inner wall 14 extends outward. The inner wall 14 and the correspondingly formed fume chamber wall 16 of the fume chamber 15 face each other with a small gap 17 in between.

A side fumarole gap 18 is formed in the fumarole chamber 15 , and the fume chamber 15 is communicated with the air inlet 9 through an air pipe 19 .

The mixed gas passage 11 and the gas chamber 6 are in communication via a passage 20 formed at the bottom of the combustion cylinder 3.

Further, in the gas chamber 6, a blind liquefied fuel flow stop plate 21 is disposed along the combustion tube 3, the tip end of which is adhered by welding or the like to the combustion tube 3 on the side of the flame nozzle 4. A bag-shaped liquefied fuel evaporation chamber 22 is defined between the liquefied fuel evaporation chamber 22 and the inner surface of the combustion tube 3, and a gas chamber 6 is formed on the base end side of the liquefied fuel evaporation chamber 22.
It is open so that it can be communicated with.

The liquefied fuel flow stop plate 21 is shown in FIGS. 1 and 2.
As shown in the figure, it extends all around the inside of the combustion tube 3,
This may be the lower half as shown in FIG. 4, or about the lower one-third.

The liquefied fuel flow stop plate 21 may have one end bonded between the combustion tube 3 and the combustion disk 5 as shown in FIG.

Reference numeral 23 denotes a fuel supply pipe, and the open end of the fuel supply pipe 23 faces a position close to the outer surface of the fuel diffuser 12.

24 is a spark plug.

Next, the operation of the present invention will be explained.

To start the burner now, if the motor is started, the rotary carburetor 10 rotates at high speed together with the fuel diffuser 12 provided at its inner bottom, and the forced air blown from the blower tube 8 is transmitted to the rotary carburetor 10 and The hot air is passed through the hot gas passage 11 and further from the passage 20 to the gas chamber 6 .

Further, the forced wind that has entered the fumarole chamber 15 from the air inlet 9 via the air pipe 19 is blown out into the mixed gas passage 11 through the side fumarole gap 18 thereof.

Under this condition, if a predetermined amount of liquid fuel is sent from the fuel supply pipe 23 toward the outer surface of the fuel diffuser 12, it will be spread evenly along the surface of the fuel diffuser 12 and will be transferred to the rotary vaporizer cylinder.
The fuel is supplied to the inner surface of the cylinder 0, and is transferred while being diffused into a thin film due to the blowing action of the forced air circulating as described above and the action of the centrifugal force due to the rotation, and becomes fine particles from the fuel scattering part 13 of the rotary vaporizing cylinder 10. It is scattered into the combustion tube 3 and quickly causes main combustion by the discharge action of the spark plug 24.

Then, when the rotary vaporizer cylinder 10 is heated with live combustion flames, the gasification of the fuel is promoted, and the continuously fed liquid fuel is sequentially transferred to the inner surface of the rotary vaporizer cylinder 10 in the form of a thin film. In the process of evaporation, the generated vaporized gas is stirred and mixed as it passes through the mixed gas passage 11 with forced air, becoming a complete mixed gas and stored in the gas chamber 6 via the passage 20. The gas is then ejected from the flame hole 7 of the combustion plate 5 at a constant pressure, and is combusted as vaporized blue flame.

By the way, in cold weather, the combustion tube 3 is not sufficiently heated yet at the initial stage of ignition, and the combustion tube 3 is cold.

For this reason, a portion of the vaporized gas that has come into contact with the inner wall surface of the combustion tube 3 may liquefy, although usually in a small amount, and drip and concentrate in the lower part of the gas chamber 6 .

However, since the gas chamber 6 is divided into a liquefied fuel evaporation chamber 22 whose distal end is closed by a liquefied fuel flow stop plate 21 and whose proximal end is open, the generated liquefied fuel is transferred to the proximal end. The liquefied fuel enters the liquefied fuel evaporation chamber 22 through the open part and is temporarily stored therein, and is prevented from flowing out to the outside.

Since the upper surface of the liquefied fuel evaporation chamber 22 is covered by the liquefied fuel stop plate 21, the liquefied fuel stored in the liquefied fuel evaporation chamber 22 gradually evaporates into gas as the temperature inside the combustion tube 3 increases. While the gas is being heated, the gas enters the gas chamber 6 from the open side and is stirred and mixed with the mixed gas that is continuously supplied into the gas chamber 6, becoming a warm gas with an appropriate concentration and flowing out from the flame hole 7 under a constant pressure state. The fuel is combusted by fumarole.

Therefore, it is possible to prevent the mixing of red flame caused by the fumes of moisture gas with different concentrations into the blue flame already generated in the combustion tube 3, and to generate blue flame well from the start of transition to vaporization combustion. I can do it.

In short, the present invention provides a combustion chamber 3 with a flame nozzle 4 open at one end, a combustion plate 5 having a large number of nozzles 7, and a gas chamber 6 between them. Even if the open end of the blower tube 8 is faced into the combustion tube 3 and the rotary carburetor tube 10 is provided correspondingly, there are
A blind liquefied fuel flow stop plate 21 whose tip end is installed inside the combustion tube 3 on the side of the flame nozzle 4 and is closed is disposed along the combustion tube 3, and the inner surface of the combustion tube 3 and the liquefied fuel flow stop plate 21 are closed. A bag-shaped liquefied fuel evaporation chamber 22 is defined between the liquefied fuel evaporation chamber 22 and the proximal end of the liquefied fuel evaporation chamber 22 is open to communicate with the gas chamber 6. The liquefied fuel generated during the transition period until the temperature reaches a sufficiently high temperature is introduced into the liquefied fuel evaporation chamber 22 from the open part and temporarily stored therein, and is prevented from flowing out of the combustion tube 3, thereby eliminating any danger. The liquefied fuel temporarily stored in the liquefied fuel evaporation chamber 22 is gradually evaporated and vaporized little by little as the temperature of the combustion tube 3 rises, and the generated vaporized gas is transferred from the base end opening to the gas chamber 6. Gas chamber 6
The mixture is stirred and mixed in the gas chamber 6 with the air mixture pressurized into the gas chamber 6, and while the mixture gas is kept at a constant concentration, it can be combusted through a number of fumarole holes 7. As a result, highly concentrated vaporized gas is released all at once. Since the liquefied fuel evaporation chamber 22 is not burned out, the liquefied fuel evaporation chamber 22 can be prevented from being mixed in with the red flame generated by fumarole combustion, and the liquefied fuel evaporation chamber 22 can be vaporized in a blue flame state from the start of vaporization combustion. It has the effect of being able to be used repeatedly over a long period of time.

[Brief explanation of drawings]

The drawings show one embodiment of the device of the present invention, and the first
The figure is a longitudinal sectional front view of the vaporizing burner with a part cut away, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a longitudinal sectional front view showing a part of another example, and Fig. 4 is another example. FIG. 1... Combustion part, 1'... Burner body case, 2... Rotating shaft of motor, 3...
Combustion tube, 4...its nozzle, 5...combustion plate, 6...gas chamber, 7...nozzle hole,
8...Blower tube, 9...Air vent, 10.
... Rotating carburetor cylinder, 11 ... Mixed gas passage, 21 ... Liquefied fuel flow stop plate, 22 ...
Liquefied fuel evaporation chamber.

Claims (1)

[Scope of utility model registration request] A combustion plate having a large number of flame holes is arranged in a combustion cylinder with an open flame nozzle at one end to form a gas chamber between them, and an open end of a blower cylinder is placed inside the combustion cylinder. In the gas chamber, a blind liquefied fuel flow stop plate whose tip end is attached to the combustion cylinder on the side of the flame nozzle to block the combustion cylinder is installed in the gas chamber. A bag-shaped liquefied fuel evaporation chamber is arranged along the cylinder to define a bag-shaped liquefied fuel evaporation chamber between the inner surface of the combustion cylinder and the vaporized fuel flow stop plate, and the base end side of the liquefied fuel evaporation chamber communicates with the gas chamber. A vaporizing burner characterized by being open.