JPS6238105Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a burner manufactured by pressing from a flat plate for use in gas combustion appliances.It has a mixing tube with both suctions, and a bent part that guides the air-fuel mixture to the flame hole. In a burner that has a pressure equalizing section for rectifying the flow, by devising the pressure equalizing section, a single pressed plate is bent around the flame hole, and then caulked to form a completely integral part. .

Traditionally, burners are made by pressing from a flat plate.
As shown in Fig. 1 a, b, c and Fig. 2 a, b, c, d, two pressed flat plates having a mixing tube 1 and a pressure equalizing part 2 and a flame hole part 3 are placed in a spot. Trace 4) There is something welded on. However, in both cases, the desired flame uniformity could not be obtained because the pressure equalizing section did not function sufficiently. Therefore,
As shown in Fig. 1, it was necessary to insert a pressure equalizing coil 5 into the upper part of the pressure equalizing part 2, or to provide an additional pressure equalizing plate in the lower part of the flame hole part 5, as shown in Fig. 2. . In such a case, many parts are required, such as left and right burner side plates, a top plate with flame holes, a pressure equalizing coil or a pressure equalizing plate, etc., which not only increases the mold cost but also increases the cost of spot welding. , assembly costs, etc. were added together, resulting in a significant increase in manufacturing costs.

The present invention is intended to compensate for the above-mentioned drawbacks of conventional burners, and is to realize a pressure equalizing part that allows a burner with mixing pipes for both suctions to be completely integrally molded from a single pressed flat plate.

That is, the present invention consists of a primary air suction hole, a throat, and a mixing tube, a pair of mixing portions extending toward both ends of the burner, respective bent portions connected to the mixing tube and provided at both ends of the burner, and each of the above-mentioned A pressure equalizing section consisting of a jet guide, a pressure equalizing throttle, and a pressure equalizing section connected to the curved section, and a flame hole section having a number of flame holes arranged in parallel connected to the pressure equalizing section, and the pressure equalizing section connected to the curved section. Both ends of the diaphragm are located outside both ends of the flame hole, and the flame hole, mixing part, cutting part, and pressure equalizing part are completely integrally formed by bending both sides of the flame hole of a single plate. At the same time, the ejection guide is provided with an angle, and the vertical length of the equalizing throttle is gradually shortened toward the center of the burner.

An example of application as a burner for a small water heater is shown in FIGS. 3a, b, c, and d. The mixing section is for suctioning primary air by ejection from a nozzle, and is composed of a primary air suction hole 1, a throat 2, and a mixing tube 3. The air-gas mixture mixed in this mixing section is changed direction at the bend 5.

In addition, the air-fuel mixture is guided to a flame hole section consisting of a large number of flame holes 9 by a pressure equalization section consisting of a jet guide 6, a pressure equalization throttle 7, and a pressure equalization section 8 so that the flame becomes uniform.

The flame hole 9 can be integrally molded. It consists of punched slits or round holes. It is possible to integrally mold a burner that does not have a constricted part directly below the flame hole, but as in the present invention, there are bent parts 5 at both ends of the burner, and it is difficult to bend both sides of the flame hole 9 in the burner that changes the flow of the air-fuel mixture. First, when bending on both sides of the flame hole 9, both ends of the equalizing throttle 7 and the entire curved portion 5a of the bent portion 5 must be provided outside the flame hole 9 in order to insert the bending mold core. The reason for this is that the pressure equalizing throttle 7 and the bent portion 5 directly below the flame hole 9 become an obstacle.

As a result of experiments, it was found that this could be achieved by focusing on the following three elements and limiting their scope. The three elements are the angle θ of the jet guide 6, the width d of the pressure equalizing throttle 7, and the height h of the pressure equalizing section 8.

() Regarding the equalizing drawing width d Regarding the width d of the equalizing drawing 7, it is necessary to have the minimum width for inserting the bending die core when bending a flat plate. On the other hand, in order to equalize the pressure, the smaller it is, the more effective it is. Although the minimum width can be set small by increasing the pressure equalization height h, the burner of the present invention was able to obtain performance in the range of d/D = 0.2 to 0.5 in relation to the flame hole width D.

() Regarding the jet guide The angle θ of the jet guide 6, together with the width of the equalizing throttle, is effective in making the flame uniform. Figure 3 a, c
As can be seen, since the jet guide 6 has an angle θ, the length in the vertical direction of the pressure equalizing orifice having the width d is set to gradually become shorter toward the center of the burner, forming a triangular orifice. There is.

Figure 4 shows the relationship between each element and the flow velocity distribution. Compared to the flow velocity distribution (A) in which the pressure equalization section is not devised, adjusting the orifice width (d) results in a flow velocity distribution as shown in (B).
Furthermore, by adjusting the angle θ of the jet guide 8, a substantially uniform distribution can be obtained as shown in FIG. The angle at which such a distribution can be obtained is θ=10° to 30°.

() Regarding the pressure equalization height Although a substantially uniform distribution can be obtained by the pressure equalization throttle 7 and the jet guide 6, as can be seen in the distribution shown in FIG. The pressure equalization height h of the pressure equalization section 9 is adjusted to eliminate this variation. Equal pressure height h and jet guide 6
has a close relationship with the angle θ. As shown in FIG. 5, if θ is increased, h must be increased, which increases the burner height H and increases costs. On the other hand, if θ is made small, the burner height is small, but the burner length becomes large, which also increases cost and makes it difficult to use.

The burner of the present invention was able to obtain performance in the range of h/H=0.2 to 0.5 in relation to the burner height H. In the manner described above, a completely integrally molded gas burner with uniform flame can be realized. As an example,
I mentioned burners for small water heaters, but burners for large water heaters,
It can also be used for bathing.

As described above, the gas burner of the present invention has the following effects.

Since both ends of the curved part and the pressure equalizing orifice are located outside both ends of the flame hole, it is possible to use the bending core required to bend at right angles on both sides of the flame hole, i.e., one piece. After the burner plate is bent on both sides of the flame hole, it can be pulled out from the burner without being hindered by the bent portion or both ends of the pressure equalizing throttle. Therefore, it is possible to efficiently perform complete integral molding by press-molding a single plate, bending it on both sides of the flame hole, and caulking the outer peripheral edge.

The length of the pressure equalization throttle in the vertical direction is set to gradually become shorter toward the center of the burner, due to the pressure equalization throttle having a certain width that communicates the angle of the jet guide, the curved part, and the pressure equalization section. Therefore, the flame distribution is uniform.

Because the pressure equalization section is provided, there is no turbulence in the flame, allowing for stable and low-noise combustion.

Since it is completely integrally molded, including the flame hole, there is no crackling noise caused by the difference in shrinkage rate when igniting or extinguishing.

Since it is completely integrally molded including the flame hole, there is no heat resistance at the joint and the temperature of the flame hole does not rise, so not only does it have a long service life, but there is no slight gas leakage from the joint.

Since it is a mixing part for both suctions and curved parts are formed at both ends of the burner, the burner is very compact in the longitudinal direction.

[Brief explanation of the drawing]

Figures 1 a, b, and c are a plan view, front view, and sectional view of a conventional burner; Figures 2 a, b, c, and d are a plan view, a front view, a bottom view, and a sectional view of a conventional burner; Third
Figures a, b, c, and d show a gas burner according to an embodiment of the present invention. A graph showing the relationship between each element of the pressure equalizing part of the gas burner of the present invention and the flow velocity distribution, and FIGS. 5a and 5b are front views showing the relationship between each element of the pressure equalizing part and the shape of the gas burner. 1... Primary air suction hole, 2... Throat, 3...
...Mixing tube, 5...Bent part, 6...Ejection guide, 7
... pressure equalization throttle, 8 ... pressure equalization section, 9 ... flame hole.

Claims (1)

[Scope of utility model registration request] A pair of mixing parts consisting of a primary air suction hole and a throat mixing pipe and extending toward both ends of the burner, respective bent parts connected to the mixing pipes and provided at both ends of the burner, and an ejection guide connected to each of the bent parts. a pressure equalizing section consisting of a pressure equalizing throttle and a pressure equalizing section;
a flame hole section in which a large number of flame holes are arranged in parallel and connected to a pressure equalization section; the bent section and both ends of the pressure equalization throttle are located outside both ends of the flame hole section; The bent part and the pressure equalizing part are completely integrated by bending both sides of the flame hole of a single plate, and the jet guide is angled so that the vertical length of the pressure equalizing orifice is directed toward the center of the burner. A gas burner with a structure that gradually shortens.