JPH02275205A - combustion device - Google Patents

Abstract

PURPOSE:To shorten the fire spread time between burners and hence prevent the discharge of vaporized gas by installing a fire spread section formed by notching an open end in a mixing chamber and a fire spread plate which covers a flame hole in contact with said opening end of the mixing chamber. CONSTITUTION:The air spread from a combustion fan 19 is divided into three systems which comprise a vaporizer air which flows into a mixing chamber 15 through a vaporizer 11, a primary air which flows into the mixing chamber 15 from an inlet 13, and a secondary air which is ejected from a secondary air hole 18 passing through a secondary air chamber 17. The vaporized air generated in the vaporizer 11 is ejected from an outlet 12 and flows into the mixing chamber 15 where the vaporizer air and the primary air are mixed with each other, thereby producing premixed air. The premixed air which collides with a fire spread plate 22 out of the premixed air ejected from a flame hole 16C, flows to a fire spread section 21 as well, gets ignited by the flame at the tip and hence forms flames in the flame hole 16C, spreads fire an adjoining premixed air consecutively, and forms flames in all the flame holes 16 instantaneously. It is, therefore, possible to reduce fire spread time between burners and hence prevent the discharge of vaporized gas.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to flame transfer between burners in a combustion apparatus having a plurality of burners.

BACKGROUND OF THE INVENTION As shown in FIG. 3, a conventional combustion apparatus of this type is provided with a mixing chamber 5 on the outlet 2 side of a carburetor 1 that communicates with an air chamber 4 through an inlet 3. A plurality of porous flame holes 6 were provided inside the mixing chamber 5 and divided into a plurality of pieces in the longitudinal direction, and a secondary air chamber 7 was provided between the flame holes 6 and communicated with the air chamber 4. A secondary air hole 8 was opened at the upper end of the secondary air chamber 7.

(Two burners were formed with the above configuration.)
The combustion fan 9 was in communication with the air chamber 4.

The ignition plug 10 was provided downstream of the flame hole 6A.

In the above configuration, the vaporized gas generated in the vaporizer 1 is ejected from the outlet 2 and flows into the mixing chamber 5. The primary air sent from the combustion fan 9 and passed through the inlet 3 flows into the mixing chamber 5, mixes with the vaporized gas, and becomes a premixed mixture. This premixed air was ejected from the flame hole 6, and combustion was started by the ignition plug 10. Furthermore, the secondary air sent from the combustion fan 9 and blown out from the secondary air hole 8 promoted the previous combustion. Also,
Since the open end 5A of the mixing chamber 5 receives the heat of the flame to increase the temperature of the mixing chamber 5, the vaporized gas generated in the vaporizer 1 does not condense on the inner surface of the mixing chamber 5.

Problems to be Solved by the Invention However, in the above configuration, the premixture ejected from the flame hole 6A is ignited by the ignition plug 10 to form a flame, which is then transferred to adjacent premixtures. However, since the open ends 5A of the two mixing chambers 5 exist between the flame holes 6B and 6C, it takes time for the flame to transfer between the burners, and during that time, vaporized gas is discharged. had.

The present invention solves such conventional problems, and aims to shorten the time for flame transfer between burners and prevent the discharge of vaporized gas.

Means for Solving the Problems In order to solve the above problems, the combustion device of the present invention includes a plurality of vaporizers, a mixing chamber paired with the vaporizers, and a plurality of vaporizers arranged inside the mixing chamber in the longitudinal direction. A flame hole provided separately, a secondary air chamber provided between the flame holes, a secondary air hole opened at the upper end of the secondary air chamber, and a notch cut out at the open end of the mixing chamber. A combustion device comprising: a formed fire transfer portion; and a fire transfer temporary provided so as to cover the flame transfer portion and the flame hole in contact with the open end of the mixing chamber.

Effect of the present invention With the above-described configuration, the premixed air that has collided with the fire transfer plate flows to the fire transfer portion, collides with the open end of the mixing chamber, and is ejected upward. Therefore, when the premix ejected from the flame hole covered by the flame transfer plate is ignited by spark transfer between the premixtures and a flame is formed, a flame is also formed at the flame transfer portion. On the other hand, the premixture ejected from the flame hole covered by the other flame transfer plate similarly flows to the flame transition area, where it is ignited by the previous flame to form a flame, reducing the flame transfer time between burners. can.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIGS. 1 and 2, 11 is a vaporizer, and this vaporizer n
A mixing chamber 15 is provided on the outlet 12 side of the mixing chamber 11 and communicates with the air chamber 14 through an inlet 13 and is made of a thermally conductive material. A porous flame hole 16 is provided inside the mixing chamber 15 and divided into a plurality of pieces in the longitudinal direction, and a secondary air chamber 17 is connected to the air chamber 14 and is provided between the flame holes 16. There is. 1
A secondary air hole 8 is opened at the upper end of the secondary air chamber 17. (Two burners are formed by the above structure.) 19 is a combustion fan, which is communicated with the air chamber 14. 20 is an ignition plug, which is provided on the downstream side of the flame hole 16A. Reference numeral 21 denotes a flame transfer part, which is formed by cutting out the open end 15A of the mixing chamber 15, and a flame transfer part 22 is connected to the flame holes 16B, 16c.
and the fire transfer part 21.

In the above configuration, the air sent from the combustion fan 19 passes through the vaporizer 11 and flows into the mixing chamber 15 as vaporizing air, the primary air flows into the mixing chamber 15 from the air pocket 13, and the secondary air passes through the secondary air chamber 17 as secondary air. The secondary air ejected from the air holes 18 is divided into three systems. On the other hand, the vaporized gas generated in the vaporizer 11 is ejected from the outlet 12 and flows into the mixing chamber 15, where it is mixed with the vaporizing air and the primary air to form a premixed gas. flame hole 16
The premixture jetting out from A is ignited by the spark plug 20 to form a flame, which is then transferred to the adjacent premixtures and reaches the flame hole 1.
A flame is instantly formed at 6B.

The premixture that is ejected from the flame hole 16B and collides with the internal flame transfer portion 22 flows along the inner surface of the flame transfer plate 22 to the flame transfer portion 21, collides with the open end 15A of the mixing chamber 15, and is diffused. Instead, it ejects upwards and forms a flame.

On the other hand, the internal flame transfer plate 2 of the premixture spewing out from the flame hole 16C
The premixture that collides with the premixture 2 similarly flows to the flame transfer section 21, is ignited by the previous flame, forms a flame in the flame hole 16C, and then ignites the premixture adjacent to the flame hole 16C, causing flame to spread to all the flame holes 16. is formed instantly. Therefore, there is an effect that the time for flame transfer between burners can be shortened and the emission of vaporized gas can be prevented. Furthermore, since the open end 15A of the mixing chamber 15 receives the heat of the flame to increase the temperature of the mixing chamber 15, the vaporized gas generated in the vaporizer 11 does not condense on the inner surface of the mixing chamber I5.

Effects of the Invention As described above, the combustion apparatus of the present invention provides the following effects.

(1) Since the flame transfer plate is provided to cover the flame transfer part and the flame hole, the flame transfer time between burners can be shortened, and there is an effect of preventing the discharge of vaporized gas.

(2) Since the heat of the flame is received at the open end of the mixing chamber, condensation of vaporized gas inside the mixing chamber can be prevented.

(3) Since secondary air holes are provided between the flame holes, combustion characteristics can be improved and noise can be reduced.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of a combustion device according to an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view, and FIG. 3 is a partially cutaway sectional view of a conventional combustion device. . 11... Carburizer, 14... Air chamber, 1
5...Mixing chamber, 15A...Open end, 1
6.16A~16C...flame hole, 17...
・Secondary air chamber, 18... Secondary air hole, 21...
...Fire transfer part, 22...Fire transfer board. Name of agent: Patent attorney Shigetaka Kurino Haka 1 person 14 -- 1 air chamber 15 -- 1 humidity!

Claims (1)

[Claims] A mixing chamber paired with the vaporizer, which is provided on the downstream side of the plurality of vaporizers in communication with an air chamber, and a plurality of flame holes provided inside the mixing chamber and divided into a plurality of flame holes in the longitudinal direction; A secondary air chamber is provided between the flame holes to communicate with the air chamber, a secondary air hole is opened at the upper end of the secondary air chamber, and a flame is formed by cutting out the open end of the mixing chamber. A combustion device comprising: a transfer section; and a transfer plate provided to cover the transfer section and the flame hole in contact with the open end of the mixing chamber.