JPH0113214Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vaporizing burner for liquid fuel such as kerosene.

Conventionally, as shown in FIG. 1, liquid fuel A is rotatably atomized by a diffuser 20 disposed inside a gas container main body 10 and vaporized in the vaporizer main body 10, and then transferred to the vaporizer main body 10 by this and a blower fan 30. The vaporizer body 10 is used as a liquid fuel vaporization burner that mixes the blown combustion air and ignites and burns the mixture in the peripheral wall 41 having the combustion holes 41a of the burner body 40.
A liquid fuel vaporizing burner is known in which a heat recovery flange 11 is formed at the upper part of the burner body 40 so as to surround the lower end of the peripheral wall 41 of the burner body 40.

However, in such a liquid fuel vaporizing burner, the heat recovery flange 11 of the vaporizer body 10 cannot sufficiently absorb the combustion heat of the combustion flame B ejected from the peripheral wall 41 of the burner body 40, and in particular, the amount of combustion is When the temperature is large, the amount of sprayed liquid fuel A and the amount of air blown increase, resulting in a disadvantage that the temperature drops significantly. Further, in order to avoid the above-mentioned drawbacks, a method has been used in which the heater 60 attached to the lower part of the carburetor body 10 is energized, but this method poses a problem in terms of energy saving.

In addition, in this liquid fuel vaporization burner, the heat recovery flange 11 is formed so as to surround only the lower end side of the peripheral wall 41 of the burner body 40, so the flow velocity of combustion air becomes faster during large combustion, and as a result, The combustion flame B ejected from the combustion hole 41a becomes elongated in the diagonal horizontal direction, and the combustion flame B blows out from the peripheral wall 4 of the burner body 40.
There is a tendency to move away from 1. This tendency becomes stronger as the amount of combustion increases, and eventually the velocity of the air blown out from the combustion hole 41a becomes faster than the flame propagation velocity, and there is a possibility that the so-called blow-out phenomenon of the combustion flame B may occur.

In view of the above-mentioned conventional drawbacks, the present invention aims to provide a liquid fuel vaporizing burner that can sufficiently absorb the combustion heat of the combustion flame ejected from the peripheral wall of the burner body and prevent the combustion flame from blowing out. It is something to do. Hereinafter, the present invention will be explained with reference to the drawings.

2 and 3 show an embodiment of the present invention, and the same components as those of the conventional example are denoted by the same reference numerals. That is, in the figure, 20 is the diffusion blade 2
1. Heat insulation plate 22, legs 23, and liquid fuel supply cylinder 24
A diffuser consisting of
A predetermined distance 25 is formed between the fuel supply cylinder 24 and the fuel supply cylinder 24 . Reference numeral 30 denotes a blower fan disposed inside the air duct 31, and is attached to one end of a rotating shaft 32a of a blower motor 32. 40 is a burner body formed in a hat shape, and its peripheral wall 41
has a plurality of combustion holes 41a. Reference numeral 50 denotes an air blow tube, which is attached to the outside of a carburetor main body 70, which will be described later, at a predetermined interval, and has a plurality of blow holes 51a in its peripheral wall 51. 60 is a heater attached to the lower part of the carburetor main body 70.

70 is the main body of the vaporizer, which includes a large diameter upper cylinder (heat recovery flange) 71 and a small diameter lower cylinder (vaporization part).
72. The heat recovery flange 71
is composed of a connecting portion 71c extending laterally (radially) from the upper end of the vaporizing portion 71 and a heat recovery portion 71b extending upward (axially) from the tip of the connecting portion 71c. The upper part 71a is made of a thin plate-like super heat-resistant alloy. Further, the heat recovery section 70b includes the burner body 40 and the air blower tube 50.
and the peripheral wall 4 of the burner body 40
The peripheral wall 41 is formed so as to surround the entire peripheral wall 41 at a predetermined interval from the outer surface of the peripheral wall 1 .

In addition, 80 is a motor connected to the rotating shaft 80a to the diffuser 20, 90 is an electromagnetic pump, and 100 is a fuel whose one end is connected to the electromagnetic pump 90 and the other end is arranged inside the fuel supply cylinder 24 of the diffuser 20. Supply tube, 1
10 is a thermistor, 120 is an ignition rod, and 130 is a flame detector.

In the above-described configuration, when the liquid fuel vaporizing burner is ignited, the liquid fuel A jetted into the fuel supply cylinder 24 by the electromagnetic pump 90 is caused by the centrifugal force caused by the rotation of the diffuser 20 to cause the liquid fuel A to flow into the fuel supply cylinder 24. Go up the inner wall surface of the carburetor body 7 from the space 25.
It scatters in the form of a mist toward the vaporization section 72 of 0. Since the vaporization section 72 is heated to the vaporization temperature by the heater 60, the atomized liquid fuel A that touches the vaporization surface is instantly vaporized. The vaporized liquid fuel A is forced by the blowing fan 30 to the blowing hole 31a of the air duct 31 and the through hole 8 of the mounting plate 81 of the motor 80.
It mixes with the air that has flowed in through 1a and becomes combustion gas. The combustion gas flows into the burner body 40 through the mixing cylinder 140 and further passes through the pressure equalizing cylinder 150 and the wire mesh 160.
The heat is emitted from the combustion hole 41a of the peripheral wall 41 of the burner body 40, ignited by the spark of the ignition rod 120, and then the heat recovery part 71b of the heat recovery flange 71 of the vaporizer body 70 is emitted.
The combustion flame B is ejected towards the And the combustion flame B
When the heat recovery section 71b is heated and the vaporization section 72 reaches the vaporization temperature, the heater 60 is de-energized and the liquid fuel A is absorbed only by the heat absorbed by the heat recovery section 71b.
vaporization and combustion will continue.

In this way, the heat recovery flange 7 of the vaporizer main body 70
1 is constantly sufficiently heated by the combustion flame B and reaches the vaporization section 7.
As shown in Figure 3, compared to the conventional liquid fuel vaporizing burner (indicated by a dashed line A), the liquid fuel vaporizing burner of the present invention (indicated by a solid line B) maintains a vaporization temperature of Even when the amount is large, the temperature of the vaporizing section 72 should be kept at the ideal vaporizing temperature (280° to 300°).
The temperature will not drop significantly from ℃). Therefore,
The temperature of the vaporizing section is almost constant from low to high combustion amount, which has the effect of widening the range of good combustion.

Further, the liquid fuel vaporizing burner according to the present embodiment connects the heat recovery flange 71 to a connecting portion 71c extending laterally from the upper end of the vaporizing portion 72.
and a heat recovery section 71b extending upward from the tip of the burner body 40, and the heat recovery section 71b is formed so as to surround the entire circumferential wall 41 at a predetermined distance from the outer surface of the circumferential wall 41 of the burner body 40. The combustion flame B collides with the heat recovery section 71b, and is held flame-stabilized between the outer surface of the peripheral wall 41 and the heat recovery section 71b.
The combustion flame B does not move far away from the Therefore, the blow-out phenomenon of combustion flame B does not occur,
Stable combustion can be achieved.

Furthermore, since only the upper part 71a of the heat recovery flange 71 is made of a super heat-resistant alloy, the cost of the vaporizer main body 70 as a whole can be reduced.

As explained above, the present invention is characterized in that liquid fuel is rotary atomized by a diffuser and vaporized in a cylindrical vaporizer body having a heat recovery flange, and combustion air is blown into the vaporizer body by a blower fan. In a liquid fuel vaporizing burner that mixes and burns the mixture in a combustion hole in a peripheral wall of a burner body, the heat recovery flange is connected to a connecting part extending radially from the tip of the vaporizing part of the vaporizer body, and the connecting part. a heat recovery section extending in the axial direction from the tip of the section, and the heat recovery section is made of a super heat-resistant alloy in whole or in part, and
Since it is formed so as to surround the entire peripheral wall at a predetermined distance from the outer surface of the peripheral wall of the burner body, the heat recovery section of the heat recovery flange of the vaporizer main body is always sufficiently heated by the combustion flame to maintain the temperature of the vaporization section. Even when the combustion amount is large, the temperature of the vaporization section does not drop significantly from the ideal vaporization temperature, and it has the advantage that stable combustion can be obtained at all times. In addition, even when the combustion amount is increased, the combustion flame ejected from the peripheral wall of the burner collides with the heat recovery section, and the flame is held between the peripheral wall and the heat recovery section, so that the combustion flame is blown out. This phenomenon is prevented and stable combustion can be obtained. Furthermore, since the vaporization and combustion of the liquid fuel is continued only by the heat recovered by the heat recovery flange, it is not necessary to heat the vaporizer body with a heater, which is advantageous in terms of energy saving. Furthermore, since all or part of the heat recovery section is made of a super heat-resistant alloy, the heat recovery flange can be maintained at a high temperature, and as a result, the temperature of the vaporization section during combustion can be kept almost constant. can. Further, such a super heat-resistant alloy is not used for the entire carburetor body but only for all or part of the heat recovery flange, which is advantageous in terms of cost.

[Brief explanation of drawings]

The drawings are for explaining the present invention, and FIG. 1 is a sectional view showing a conventional liquid fuel vaporization burner, and FIG.
The figure is a cross-sectional view showing a liquid fuel vaporizing burner according to the present invention, and FIG. 3 is a graph showing changes in vaporizing part temperature with the amount of liquid fuel burned. In the figure, 20... diffuser, 30... ventilation fan,
40...burner body, 41...peripheral wall, 41a...combustion hole, 50...air blower tube, 70...carburizer main body, 71...heat recovery flange, 72...vaporization section.

Claims (1)

[Claims for Utility Model Registration] Liquid fuel rotatably atomized by a diffuser and vaporized in a cylindrical vaporizer body having a heat recovery flange, and combustion air blown into the vaporizer body by a blower fan. In a liquid fuel vaporizing burner that mixes and burns the mixture in a combustion hole in a peripheral wall of a burner body, the heat recovery flange is connected to a connecting part extending radially from the tip of the vaporizing part of the vaporizer main body, and the connecting part It consists of a heat recovery section extending in the axial direction from the tip of the
A liquid fuel vaporizing burner characterized in that the heat recovery section is made entirely or partially of a super heat-resistant alloy and is formed so as to surround the entire circumferential wall of the burner body at a predetermined distance from the outer surface of the circumferential wall.