JPH05141626A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To obtain a liquid fuel burner which gasifies liquid fuels such as petroleum and burns the gasified liquid fuels. CONSTITUTION:A liquid fuel (a) and a combustion air (b) are supplied. A burner head 12 is installed to the upper part of an opening peripheral edge 2c of a vaporizer 2 which uses an electric heater 8 to gasify the liquid fuel. A heat collection section 13 which presses the burner head arranged to rise on the upper part of frames side in structure so as.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion apparatus for vaporizing and burning liquid fuel such as kerosene.

[0002]

2. Description of the Related Art In a conventionally used oil vaporization premixing type liquid fuel combustion apparatus, it is necessary to preheat a vaporizer in order to vaporize ordinary oil. At the start of combustion, a preheater (electric heater) is used to raise the carburetor temperature, but it is not preferable from the viewpoint of energy saving to constantly heat the carburetor with the preheater even during combustion. For this reason, a method of transmitting heat generated by combustion to the carburetor during the continuation of combustion (hereinafter referred to as heat back) is generally performed.

[0003]

However, when using a combustion plate (for example, a ceramic flat plate burner head) in which the flame extends upward (does not spread laterally), the heat of the flame is directly transferred to the vaporizer. It is difficult to heat back, so development of other means is awaited.

In view of the above circumstances, the present invention has an object to provide a liquid fuel combustion apparatus which solves the above problems by integrating a heat recovery member (heat back metal fitting) above the peripheral portion of the burner head. ..

[0005]

According to the present invention, a liquid fuel and combustion air are supplied, the liquid fuel is vaporized by an electric heater, and at the same time, a vaporizer having an opening at the top and an opening of the vaporizer are provided. A plate-shaped burner head that is attached and burns a mixed gas of vaporized fuel and combustion air that has been vaporized by a vaporizer, an abutment portion that contacts the opening peripheral edge of the vaporizer and the peripheral edge of the burner head, and The heat recovery member integrally includes a heat recovery unit that is erected above the burner head from the inside of the abutting unit.

Also, liquid fuel and combustion air are supplied,
A liquid fuel vaporizes with an electric heater, and a vaporizer with an opening at the top, and a flat plate that is attached to the vaporizer's opening and burns a mixed gas of vaporized fuel vaporized by the vaporizer and combustion air. The burner head, an abutting portion that comes into contact with the opening peripheral edge of the carburetor and the peripheral edge of the burner head, and a heat recovery section that is erected above the burner head from inside the abutting portion are integrally provided. A heat recovery member and a mounting screw for attaching the contact portion of the heat recovery member to the peripheral edge of the opening of the carburetor are provided, and the portion where the mounting screw is mounted to the peripheral edge of the opening of the carburetor is lower than other parts. ..

[0007]

As described above, as a means for heating back the heat of the flame to the carburetor, the metal part (heat recovery member) for fixing the burner head is cut at both sides with a gradient on the flame side. By standing up and using this as a heat receiving portion, the amount of heat back is easily secured.

When fixing the heat recovery member to the carburetor with screws, the periphery of the screw stop position provided at the peripheral edge of the opening of the carburetor is set to be lower than the other parts so that the heat recovery member receives heat at the peripheral edge thereof. Does not cause deformation.

[0009]

The present invention will be described below with reference to the drawings of the embodiments.

FIGS. 1 to 5 show a liquid fuel combustion apparatus using a heat recovery member obtained by bending a single plate, and 1 is a rectangular vaporizer 2 which is made of a material having good heat conduction inside. In the burner case provided, a sirocco-fan blower 4 having an air inlet 3 at one end is arranged below the burner case 1, and a ventilation pipe 5 connected to the blower 4 is attached to one end of the carburetor 2. A fuel nozzle 7 connected to an electromagnetic pump (not shown) is exposed to the center of the air nozzle 6 while being connected to the air nozzle 6. The vaporizer 2 has a structure in which the upper portion is an opening 2a and the bottom surface 2b is inclined upward, and an electric heater 8 is embedded around the upper portion. Reference numeral 9 is a first straightening vane fitted and laid in the opening 2a of the carburetor 2 and having an inflow port 10 at one end. A net-shaped second straightening vane 11 is arranged above the first straightening vane 9. The burner head 12 made of a ceramic flat plate with a small hole attached to the uppermost part of the vaporizer opening peripheral portion 2c so as to cover the opening 2a is positioned. Reference numeral 13 is a heat recovery member having a contact portion 14 with which the periphery contacts the peripheral edge portion 12a of the burner head 12.
3 is provided with a cut 13a at the center of a single plate made of heat-resistant metal,
Both sides 13b of the cut 13a are cut and raised with a gradient 13c on the flame side (see FIG. 4), and both sides of the cut 13a are heated.
It is formed as d. Reference numeral 15 is an ignition plug having its tip facing the surface of the burner head 12, and 16 is the air nozzle 6
The secondary air supply port formed in the peripheral wall of the
The air passage 17 in the burner case 1 communicating with the fuel cell 6 is made to face the other end of the carburetor 2, and the liquid fuel combustion device 18 has the overall configuration. Also in this case,
The heat recovery member 13 is attached to the carburetor opening peripheral edge portion 2c by screwing and locking it with a mounting screw 19, but the mounting screw 19 is at the screw hole position.
The counterbore 20 is provided in advance so that c is lower than other parts.

The operation will be described. First, when the liquid fuel combustion apparatus 18 is operated, the electric heater 8 is energized to raise the vaporizer 2 to a predetermined temperature, and when the vaporizer 2 reaches the predetermined temperature, the blower 4 is driven. And start a fuel pump (not shown).

Here, the liquid fuel (petroleum) a is ejected from the fuel nozzle 7 into the carburetor 2, and the primary air b fed from the blower 4 flows in from the air nozzle 6 around the outer periphery of the fuel nozzle 7. The mixed gas d composed of the primary air b and the liquid fuel a comes into contact with the upper inclined bottom surface 2b of the vaporizer 2 and becomes vaporized gas. The vaporized gas reaches the burner head 12 from the inflow port 10 of the first straightening vane 9 through the net-shaped second straightening vane 11, and is burned by the ignition plug 15 at the burner head 12.

In this case, since the gradient 13c cut and raised on the flame side of the heat recovery member 13 is located around the flame rising by the burner head 12, this is the heat receiving portion 13d, so that the flame heat is easily received. Become.

Therefore, the heat of the heated heat recovery member 13 is directly conducted to the carburetor opening peripheral portion 2c via the contact portion 14 around the heat recovery member 13, so-called heat back is performed, and the vaporizer 2 is performed. Since it heats itself, the power consumption of the electric heater 8 arranged in the vaporizer 2 can be reduced.

Further, even if the heat recovery member 13 is heated, the mounting screw (screw) 19 around the heat recovery member 13 is provided with the counterbore 20 on the peripheral portion 2c of the carburetor opening, so that the tightened portion is deformed, Does not get excited. From this point as well, the contact between the heat recovery member 13 and the vaporizer 2 is good, and a predetermined heat back amount is obtained.

FIGS. 6 to 9 show another embodiment in which the burner head is a chevron assembly of ceramic flat plates. That is, when the burner head 12 is made up of a chevron assembly of flat ceramic plates, the burner head piece 12 'formed in a dogleg shape as shown in the enlarged views of FIGS.
The burner head 12 made of ceramics is formed symmetrically and the two are abutted to each other to form a ceramic burner head 12. A heat recovery member 13 having the same structure as described above is placed on this upper surface.

As described above, the burner head 1 having a mountain shape.
In the case of using No. 2, since the small holes 21 are formed on the left and right surfaces of the chevron so that the central axis is perpendicular to the surface, the flame heat receiving portion 13d
In this way, not only can a reliable heat-back amount be secured, but also the ceramic flat plate can be easily demolded.

[0018]

As described above, in the liquid fuel combustion apparatus of the present invention, the heat recovery member provided on the burner head is used as a heat receiving portion having a gradient on the flame side, and the periphery of the heat recovery member is a carburetor opening. Since it is brought into contact with the peripheral portion, it is easy to receive the heat of the flame, a predetermined heat-back amount can be secured, and it is possible to reduce the power consumption of the electric heater for heating the vaporizer. Moreover, since the peripheral portion of the carburetor opening, which is the mounting position of the screw tightening around the heat recovery member, is lower than the surroundings (counterbore), the heat recovery member is not deformed, turned, etc. Also improves heat conduction to the vaporizer side.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view of a heat recovery member before processing.

FIG. 4 is a perspective view of the heat recovery member after processing.

FIG. 5 is an explanatory view of a mounted state of a heat recovery member and a carburetor.

FIG. 6 is a schematic view of another embodiment in which a chevron burner head is used.

FIG. 7 is a side view of the same.

FIG. 8 is a perspective view of a chevron burner head.

9 is a cross-sectional view taken along the line AA in FIG.

[Explanation of symbols]

 2 Vaporizer 2a Opening 2c Opening peripheral part 8 Electric heater 12 Burner head 13 Heat recovery member 13d Heat receiving part (heat recovery part) 19 Mounting screw 20 Counterbore (lower part than other part) a Liquid fuel b Primary air d Mixed gas

Claims (2)

[Claims] 1. A liquid fuel and combustion air are supplied, the liquid fuel is vaporized by an electric heater, and a vaporizer having an opening in the upper part, and attached to the opening of the vaporizer,
A flat burner head for burning a mixed gas of vaporized fuel and combustion air vaporized by the vaporizer, and an abutting portion that contacts the opening peripheral portion of the vaporizer and the peripheral portion of the burner head,
A liquid fuel combustion apparatus, comprising: a heat recovery member that integrally includes a heat recovery unit that is erected above the burner head from the inside of the contact unit. 2. A liquid fuel and combustion air are supplied, the liquid fuel is vaporized by an electric heater, and a vaporizer having an opening in the upper part, and attached to the opening of the vaporizer,
A flat burner head for burning a mixed gas of vaporized fuel and combustion air vaporized by the vaporizer, and an abutting portion that contacts the opening peripheral portion of the vaporizer and the peripheral portion of the burner head,
A heat recovery member integrally having a heat recovery part raised from the inside of the contact part to above the burner head, and a mounting screw for attaching the contact part of the heat recovery member to the peripheral edge of the opening of the carburetor. A liquid fuel combustion apparatus comprising a carburetor, wherein a portion to which a mounting screw is attached is made lower than other portions on an opening peripheral edge portion of the carburetor.