JPH0257804A - Gas burner - Google Patents

Abstract

PURPOSE:To prevent any incomplete combustion by a method wherein a primary air suction part and a mixing pipe part are formed in sequence, a flow regulating portion of flame port opposing to an end part of the mixing pipe part of a plurality of flame ports opened at a longitudinal upper surface and turned back from the end part of the mixing pipe is made longer than a length of a flow regulating part of the other flame port. CONSTITUTION:Gas injected from a nozzle 12 is mixed with a primary combustion air sucked from a suction part 5 under an effect of ejection at a mixing pipe 6. Its pressure is made uniform at a pressure equalizing part 7, passes through flow regulating portions 8a and 14 and is injected from flame ports 8. The gas is ignited and burned. At this time, both ends of a main body 1 of a burner acting as end portions of the mixing pipe 6 show a high inner pressure at the burner and a low inner pressure at the burner. However, since a length of the flow regulating portion 14 at flame ports 8 at both ends of the main body 1 of the burner is longer than that of the flow regulating portion 8a of another flame port 8, an injecting pressure is reduced, an amount of injection of mixture gas becomes substantially the same as that of the central portion of the main body 1 of the burner, resulting in that a length of each of the flames 15 becomes uniform. With this arrangement, flames having uniform lengths are formed and at the same time a lifting of low oxygen state can be prevented.

Description

[Detailed description of the invention] Industrial applications The present invention relates to gas burners such as water heaters.

BACKGROUND ART FIGS. 3 to 5 are schematic diagrams of conventional gas burners. 1
is the burner body, which consists of a pair of outer plates 2.2, a 0-shaped inner plate 3, and a pair of flame opening partition plates 4 sandwiched between the outer plates 2.2 and the inner plate 3. Become. The burner body 1 includes a primary air suction section 5, a mixing pipe section 6, a pressure equalization section 7,
A large number of slit-shaped flame ports 8 having a rectifying section 8 having a predetermined length.
A large number of flame ports 8 are arranged side by side along the longitudinal direction of the burner body 1 with flame ports 9 intervening alternately to form a group, and the groups are arranged in parallel to form a reflux area 10 between them. are doing. The outer plate 2.2 includes a suction section 5, a mixing pipe section 6, a pressure equalization section 7,
In order to form the rectifying part 8m, half-divided recesses are press-molded at opposite positions, and further, in order to form the flame outlet 8 and the flame outlet-cum-portion 9, the concave part 2 and the convex part 2b are press-molded. .

In addition, since the inner plate 3 and the outer plate 2 form the burner port 8, the recesses 3 and the protrusions 3b are press-molded.

The burner body 1 is assembled by joining the outer plate 2 on one side, the flame outlet partition plate 4 on the - side, and the inner plate 3 by aligning the concave portions 3-1b and 3b with the concave portions 2- and convex portions of the outer plate 2, respectively. Then, the other flame opening partition plate 4 and the other outer plate 2 are joined, and finally the outer circumference and inner circumference of the outer plate 2.2 are welded, and the convex part 2 is welded.
b, 3b, and the burner port partition plate 4 are spot welded to form the burner ports 8 independently. When the burner main body 1 is assembled, the lower ends of the pair of flame port partition plates 4.4 are bent slightly toward the center, and a gap 11 exists over the entire length in the pressure equalizing section 7. 12 is a nozzle that spouts gas.

Problems to be Solved by the Invention However, in such a burner, the fuel gas ejected from the nozzle 12 sucks secondary air for combustion from the suction part 5 by the ejector effect, mixes it in the mixing pipe part 6, and further homogenizes it. The pressure is equalized in the pressure section 7, the air-fuel mixture is ejected from each ship 8, and is ignited and combusted. When the air-fuel mixture blows out from this flame port 8,
Because the ejection pressure at both left and right end portions of the burner body 1 is strong, the flame 13 of the flame port 8 at both ends of the burner body becomes long, resulting in the so-called Onibi phenomenon, which causes the length of the flame to become uneven, resulting in incomplete combustion. . Furthermore, when combustion occurs in low oxygen conditions, the burner body 1
Because the ejection pressure at both ends of the flame is high, the flame lifts, causing the generation of coke, which is harmful to the human body.

The present invention solves the above-mentioned conventional problems.

The purpose of this invention is to form a flame of uniform length in a gas burner having a flame port, and further to prevent lifting during combustion under low oxygen conditions.

Means for Solving the Problems In order to solve the above problems, the gas burner of the present invention has a primary air suction part and a mixing pipe part formed in this order from one end, and is folded back from the end of the mixing pipe part in the longitudinal direction. The burner body has a burner body with a large number of flame ports formed on the upper surface extending from the burner body. It is longer than .

Function The present invention provides a burner having the above-described configuration, which forms a flame of uniform length over the entire flame port, and further prevents lifting during combustion in a low oxygen state.

Embodiment Hereinafter, a svarna according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2 of the drawings. Note that the same parts as those in the prior art shown in FIGS. 3 to 5 are given the same reference numerals, detailed explanations are omitted, and different parts will be mainly explained.

In the figure, the flame port 8 is the flame port 8 facing the end of the mixing pipe section 6.
However, the rectifying portion 14 has a rectifying length approximately 1.5 times longer than the rectifying portion 8a of the other flame outlet 8.

The operation of the spanner configured as above will be explained. The gas ejected from the nozzle 12 transfers primary air for combustion to the suction section 5 due to the ejector effect as shown by the arrow.
The mixture is sucked in and mixed in the mixing pipe section 6, and further pressure equalized in the pressure equalization section 7, passed through the rectification sections 8a and 14, and ejected from the flame port 8, where it is ignited and burned. When the air-fuel mixture is ejected from this flame port 8, the internal pressure of the burner is high at both end portions of the burner body 1, which are the ends of the mixing tube portion 6, and the burner internal pressure is high at the center portion of the burner body 1, which is far from the end of the mixing tube portion 6. Internal pressure is low. However, in the flame ports 8 at both ends of the burner body 1, the length of the rectifying part 14 is longer than the rectifying part 8- of the other flame ports 8, so the jet resistance is large (the jet pressure decreases, and the air-fuel mixture is not jetted. The amount is at the center of the burner body 1 (on the opposite side from the end of the mixing pipe section 6)
The length of the flame 15 becomes uniform. Furthermore, by lowering the injection pressure even during combustion in low oxygen conditions, lifting can be prevented and stable and uniform combustion can be achieved.

Effects of the Invention As described above, the present invention provides a primary air suction section and a mixing tube section, which are formed in this order, and which are opened in the longitudinal upper surface folded back from the end of the mixing tube. The rectifying part of the burner port facing the end of the burner port is longer than the rectifying part of the other burner ports, so the difference in length of the rectifying part of the burner port equalizes the burner internal pressure across the burner port body. This allows the amount of air-fuel mixture to be ejected over the entire flame opening, making the length of the flame uniform and preventing incomplete combustion. Furthermore, during combustion under low oxygen conditions, lifting caused by uneven ejection pressure is prevented, stable and uniform combustion is achieved, and CO, which is harmful to the human body, is prevented from being generated.

[Brief explanation of the drawing]

Fig. 1 is a front view of a gas burner according to an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a front view of a gas burner in a conventional example, Fig. 4 is a plan view thereof, and Fig. 5 is a front view of a gas burner in a conventional example. It is the same side view. 1...Burner body, 5...Suction part, 6
・・River/mixing pipe section, 8・・・・flame mouth, 8m, 14・
River... rectification part. Name of agent: Patent attorney Shigetaka Awano and 1 other person
Burner water body 3 - Difficult! Flowing part 4-dog Roasted 5-° mixture ttL 2-outer W4M 2a, 3α・-concave capital 2b, 3b--8 capital 3-・inner board? --- Deaf Mouth Summary Figure 5 /---Burner body 2...-Tatoi member II friend, 5...Suction part 6-Mixing master, /4...! iE Ukigunbu

Claims (1)

[Claims] Forming a primary air suction part and a mixing pipe part in order from one end,
The burner body has a burner body in which a large number of flame ports are formed on the upper surface extending in the longitudinal direction by folding back from the end of the mixing tube, and the length of the rectifying portion of the burner body facing the end of the mixing tube is A gas burner whose length is longer than the rectifying portion of the flame port other than the flame port.