JPH0216098Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a Bunsen-type gas burner used in gas appliances such as water heaters and bathtubs.

[Conventional technology] In recent years, as gas appliances have become more sophisticated and loaded,
Gas burners that are small in size and have a large combustion capacity are in demand, and gas burners that are constructed by arranging slit-like flame holes on the combustion surface have come to be used. In such a gas burner with a slit flame hole, when using a gas with a slow combustion speed or increasing the gas input to achieve a high load, the gas ejection speed from the slit flame hole overcomes the combustion speed. A rifting phenomenon occurs in which the flame is released from the combustion surface,
Combustion tended to become unstable. Therefore,
Although gas burners with various flame-holding measures have been provided, they are not always satisfactory, as they are complicated in construction and increase manufacturing costs.

[Purpose of the invention] This invention can prevent the flame lifting phenomenon and realize stable combustion.
It is an object of the present invention to provide a gas burner that has a rational, simple structure, and can be manufactured at low cost.

The configuration and effects of this invention will be specifically explained below using the drawings.

[Structure of the invention] In the embodiment shown in the drawings, the gas burner of this invention is manufactured by sheet metal work in which a single steel plate is bulged and bent symmetrically around the combustion surface 1, and each edge is attached. be done. A mixing tube section 3 is formed continuously to the gas inlet opening 2 for sucking gas and primary air, and a combustion surface 1 is formed at the upper end of the mixing tube section 3.

The combustion surface 1 has a narrow flat part 4 along both edges.
An angular convex portion 5 extending in the longitudinal direction is formed between the plane portions 4, and a slit 6 is formed perpendicular to the longitudinal direction and crossing the entire surface of the convex portion 5. Every four slits 6 form a slit group 8, and the combustion surface 1 is constructed by arranging the slit groups 8 at predetermined intervals 9. Next, the operation of this gas burner will be explained.

Fuel gas is ejected from a gas nozzle (not shown) inserted into the gas inlet opening 2 , and the gas and primary air are drawn into the mixing tube section 3 through the gas inlet opening 2 . The mixed gas 10 mixed within the mixing tube section 3 reaches the combustion surface 1 and is ejected from the slit 6, where it is ignited and combusted. Here, since the slit 6 is formed across the entire surface of the convex portion 5, the mixed gas 10
is ejected at high speed from the upper surface 6a of the slit 6 formed on the upper surface of the projection 5, and a small amount leaks out at a low speed from the side surface 6b of the slit 6 formed on the side surface of the projection 5. On the other hand, a part of the secondary air 7 that is sucked by the pressure of the ejected gas and rises along the side wall of the gas burner generates a vortex on the flat part 4 and wraps around (wall recess effect), and is released from the side part 6b of the slit 6. It is supplied to the leaking gas mixture 10, auxiliary combustion is performed on the flat part 4, and a fishtail-shaped flame holding is formed on both sides of the flame. Furthermore, since the slit groups 8 are arranged at predetermined intervals 9, the secondary air 7
flows around into the gap 9 on the combustion surface 1 and is fed to the flame formed by the slot group 8.

[Effect of the idea] The characteristic effects of this invention are as follows.

Since the combustion surface 1 is formed with narrow flat parts 4 along both edges, the flame formed by the slit group 8 is not affected by the secondary air 7 rising along the side wall of the gas burner. The mixture gas 10 leaking from the side surface 6b of the slit 6 causes auxiliary combustion at both sleeves of the flame, forming a flame-holding state through fishtail combustion. The flame formed by the slit group 8 can be reinforced and supplemented by the base, and the lifting phenomenon of the flame can be prevented. Therefore, it is compatible with the use of gas with a slow combustion speed, and even if the burner load is increased by increasing the gas input, stable combustion is achieved without flame lift. be able to.

Further, since the secondary air 7 that flows around and flows into the space 9 of the combustion surface 1 is constantly replenished to the flame formed by the slit group 8, it is possible to prevent red flame combustion due to a lack of secondary air 7. Even if the slits 6 are densely arranged on the convex portion 5, a stable flame can be formed for each slit group 8. Therefore,
In combination with the increase in gas input as described above, the slits 6 are densely packed, thereby making it possible to achieve higher capacity and higher load of the gas burner.

In addition, the gas burner of this invention is manufactured using sheet metal work from a single sheet of steel, and has practical effects such as being more rational and simpler than conventional products, and being extremely inexpensive to manufacture. It is something.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Figure 1 is a plan view;
2 is a side view, FIG. 3 is an enlarged sectional view taken along the line A-A' in FIG. 2, FIG. 4 is an enlarged plan view of the main part, and FIG. 5 is an enlarged perspective view of the main part. DESCRIPTION OF SYMBOLS 1... Combustion surface, 2... Gas inlet opening, 3... Mixing pipe section, 4... Plane part, 5... Convex part, 6... Slit, 8... Slit group, 9... Interval.

Claims (1)

[Scope of utility model registration request] A sheet of steel is bulged and bent symmetrically around the combustion surface 1, and each edge is attached to form the gas inlet opening 2, the mixing pipe section 3, and the combustion surface 1 at the upper end of the mixing pipe section 3. In the gas burner, an angular convex portion 5 extending in the longitudinal direction is formed on the combustion surface 1 between narrow flat portions 4 along both edges, and a convex portion perpendicular to the longitudinal direction is formed on the combustion surface 1. A slit 6 is formed across the entire surface of the slit 5, and a plurality of slits 6 are formed into a slit group 8, and a predetermined interval 9 is provided between the slit groups 8.
A gas burner characterized in that a combustion surface 1 is formed by arranging.