JPS6399408A - Burner - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a combustion device used in oil fan heaters and the like.

2. Description of the Related Art A conventional combustion device has a burner head 2 as shown in FIG.
A large number of flame holes 21 are provided on the peripheral wall of 0, and these flame holes 2
An ignition flame hole (not shown) having an opening area larger than that of the flame hole 21 is provided, and a grounding plate 22 is provided on the outer periphery of the flame hole 21 to support the annular wall 22a.
3 to prevent the combustion cylinder 25 forming the combustion chamber 24 from being heated to a high temperature. The horizontal portion 2 of the ground plate 22 extends from the burner head 20 to the annular wall 22a.
A large number of small holes 26 are provided around the entire circumference of the 2b so that a portion of hot air or combustion air is taken into the actual pipe 23, thereby widening the combustion range.

Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, only the flame formed in the ignition flame hole, which has a larger opening area than the other flame holes, extends greatly toward the outer circumference, and as a result, the flame formed in the annular wall 22a of the ground plate 22 The flame 21 collides and blows out downward from the small hole 26 in the horizontal part 22b, causing abnormal noise in some parts, and emitting carbon monoxide and other unburned components harmful to the human body when the flame comes into contact with metal parts. There was a problem.

The present invention solves these conventional problems, and aims to eliminate local abnormal noise in the burner section without expanding the combustion range or impairing the effects of improving combustion characteristics. .

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has a structure in which of the small holes provided in the ground plate, only the portion facing the ignition flame hole is made non-porous.

Effect of the present invention With the above configuration, the flame formed in the ignition flame hole is prevented from blowing out downward from the ground plate.
The generation of abnormal noise and the emission of carbon monoxide and other harmful components are eliminated.

Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 to 4. In Fig. 4, 1 is a bottomed cylindrical mixing/vaporizing cylinder with an open top (hereinafter referred to as a vaporizing cylinder), 2 is a sheathed heater embedded in this vaporizing cylinder 1, and 3 is air for combustion in the vaporizing cylinder 1. It is an air passage that supplies air and communicates with the blower 4.

A fuel pipe 5 supplies fuel to the carburetor 1 and communicates with a combustion tank 7 via a pump 6.

Next, the structure of the burner part will be explained using FIGS. 1 to 3. 8 is a burner case surrounding the outer periphery of the vaporizing cylinder 1, and 9 is a cylindrical burner attached to the upper opening of the vaporizing cylinder 1. The head has a cap 9a on the top and has a cylindrical shape with a ceiling.
The lower opening is narrowed to a small diameter and serves as a mixed gas inlet 9b. This burner head 9 has many flame holes 10 on its peripheral wall.
The flame holes 10 are arranged approximately evenly, and some of them serve as ignition flame holes 10a and have a larger opening area than the other flame holes 10.

11 and 12 are wire meshes attached to the inner and outer walls of the burner head 9, respectively. Reference numeral 13 denotes a flame rod as a flame detection sensor, the tip of which hangs down at the center of the flame hole.

Reference numeral 14 denotes an ignition electrode that ignites by spark discharge, the tip of which is positioned opposite to the ignition flame hole 10a. Reference numeral 15 denotes a grounding plate fitted around the opening of the vaporizer cylinder 1, and an annular wall 15b surrounding the outer periphery of the flame hole 10 is formed on the outer periphery of the horizontal portion 15a. A plurality of small holes 16 for introducing auxiliary combustion air are provided in the horizontal part 15a of the ground plate 15 except for the position of the ignition electrode 14.
A portion of hot air from a propeller fan (not shown) flows into the gap between the flame hole 10 and the annular wall 15th through the through hole 17g at the bottom of the combustion tube 17. .

In the above configuration, when the sheathed heater 2 is energized and the temperature of the vaporization cylinder 1 rises to a certain set value, the pump 6 supplies fuel from the fuel pipe 5 into the vaporization cylinder 1, and at the same time, the blower 4 passes the fuel through the air passage 3 and burns it. air is sent. The fuel is vaporized in the vaporization tube 1, mixed with combustion air, and ejected from the flame hole 10. This premixed gas is then ignited by a spark discharge from the ignition electrode 14, causing a flame 1
form 8. At this time, as the flame 18 is formed, a flame current flows between the flame rod 13 and the earth of the burner head 9, the earth plate 15, etc., and flame detection is performed.

On the other hand, some of the air for auxiliary combustion supplied through the through hole 17a at the bottom of the combustion tube 17 as part of the wind from the propeller fan (arrow in the figure) is provided in the horizontal part 15a of the ground plate 15. It flows through the small hole 16 into the gap between the flame hole 10 and the annular wall 15b, and the combustion reaction is promoted.

Here, the flame 18 formed in the ignition flame hole 10a extends greatly and collides with the annular wall 15t+ of the ground plate 15, but since there is no small hole 16 in the horizontal part 15m of the ground plate 15 in this part, the flame 18 continues to flow upward. Therefore, the abnormal noise that occurs when the flame blows out from the small hole 16 of the ground plate 15 is eliminated, and the generation of carbon monoxide caused by suppressing the combustion reaction due to the rapid cooling of the flame in the small hole 16 is also eliminated, resulting in good combustion. Gas properties can be obtained.

In the above embodiment, the ground plate 15 is fitted into the vaporizer cylinder 1 (burner main body), but the part up to the annular wall 15b is integrally molded with the vaporizer cylinder 1 (burner main body). Needless to say, a similar effect can be obtained.

Further, in the above embodiment, a combustion apparatus using liquid fuel has been described, but the same applies to a combustion apparatus using gaseous fuel, and the vaporization cylinder 1 in this case is simply a mixing cylinder.

Effects of the Invention As is clear from the description of the embodiments, according to the present invention, the generation of abnormal noise due to the flame formed in the ignition flame hole of the burner head is eliminated, and - the generation of harmful gas components such as carbon oxide is eliminated. Good combustion characteristics and a wide combustion range can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view of essential parts of a combustion device according to an embodiment of the present invention, FIG. 2 is a perspective view of the same, FIG. 3 is a plan view of the same, FIG. 4 is a sectional view showing the overall groove configuration, and The figure is an enlarged sectional view of main parts of a conventional combustion device. 1... Carburizer cylinder, 9... Burner head,
10... Flame hole, 10a... Flame hole for ignition, 14...... Ignition electrode, 15... Earth plate, 15a... Annular Wall, 16...Small hole for introducing auxiliary combustion air. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
°-vaporization part q---burner head 10---1, random/4-m-7 mo, large electrode.

Claims (1)

[Claims] The method includes a vaporizing cylinder having an opening, a burner head attached to the opening of the vaporizing cylinder, an ignition electrode provided on the outer periphery of the burner head, and an annular wall located between the burner head and the ignition electrode. A large number of flame holes are provided on the entire circumference of the peripheral wall of the burner head, and a flame hole at a position facing the ignition electrode is used as an ignition flame hole having a larger opening area than other flame holes, A combustion device in which a large number of small holes are provided in a portion of the ground plate from the burner head to the annular wall, and only a portion of the small holes facing the ignition flame hole is made non-porous.