JP2002228118A - Gas burner device for plurality of feed routes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burner device provided with a venturi passage being a plurality of routes, light in weight and short in a vertical size. SOLUTION: A burner port formed in a burner head 3 is divided into a plurality of sections and combustion primary air-fuel mixture gas is fed in the burner port of each section through a plurality of venturi passages 6 and 7 different in a route formed in a burner body 2 made of a plate metal. In a so formed burner device, the burner body consists of upper and lower division bodies 2a and 2b. Upper wall surfaces 6a and 7a of each venturi passage are formed at the upper division body and lower wall surfaces 6b and 7b of each venturi passage are formed at the lower division body. A branch plate 14 to individually feed combustion primary air mixture gas to each venturi passage is located in an intermediate position between the upper and lower division bodies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas burner apparatus for a plurality of supply paths applied to a gas table having a plurality of gas supply paths.

[0002]

2. Description of the Related Art Conventionally, a gas burner apparatus having a plurality of gas supply paths such as a parent and child burner for generating a large flame and a small flame has been known, and a wide range can be obtained by individually adjusting the gas amount of each gas supply path. Heat quantity can be controlled. As a structure of a gas burner for obtaining the plurality of supply paths, for example, a gas burner body a having a two-tiered upper and lower structure and a burner head b made of a forged product as shown in FIG. JP-A-9-303719). The inside of the burner body a is formed as a venturi passage c having an increased cross-sectional area on the downstream side, and is divided into two venturi passages c in the vertical direction with a partition plate d interposed between the venturi passages c. . At the end of the burner body a, there are provided double annular openings e, e opening upward, into which burner heads b having flame ports f, g divided vertically are fitted. The gas from each venturi passage c burns at each of the flame ports f and g. By forming the opening area of the upper flame port f larger than that of the lower flame port g, the maximum heat generated by the flames of the upper and lower flame ports f and g, and the minimum heat generated only by the small flame of the lower flame port g are reduced. A wide range of thermal power adjustment with thermal power can be obtained.

[0003]

In the above-described conventional burner device made of sheet metal, the cross section of the venturi passage c cannot be made to be a perfect circle because of a semicircular cross section. When a vortex-shaped jet flows, a vortex is generated at the cross section that deviates from the jet, and the vortex reduces the negative pressure and reduces the ejector effect. As a result, the suction of primary air is hindered. There was a disadvantage that flammability deteriorated. Further, the above-mentioned sheet metal burner device is lighter and more manufacturable than that manufactured by casting, but since the venturi passage c is separated into two upper and lower parts by an intermediate partition plate d, the vertical direction Has a disadvantage in that the dimensions of the cooker become large, and a mounting space is required in the vertical direction, which limits the design of the cooker.

An object of the present invention is to provide a burner device having a plurality of venturi passages, having excellent combustion performance, being lightweight, and having a short vertical dimension.

[0005]

According to the present invention, a flame port formed in a burner head is divided into a plurality of flame ports, and each of the flame ports is formed through a plurality of venturi passages having different paths formed in a sheet metal burner body. In a burner device for supplying a combustion primary air mixed gas, the burner body is formed of upper and lower divided bodies, an upper divided body is formed with an upper wall surface of each venturi passage, and a lower divided body is formed of each venturi. By forming a lower wall surface of the passage, and interposing a flow dividing plate for individually supplying the combustion primary air mixed gas of each Venturi passage to the divided flame ports in the middle of the upper and lower divided bodies, the above-described combustion performance is improved. An object of the present invention is to provide a burner device that is excellent in weight and has a short vertical dimension. Providing a raised annular burner head mounting portion on one of the upper and lower divided bodies and the flow dividing plate facilitates assembling of the burner device, and makes the gas area different from each other by changing the passage area of each venturi passage. The supply property is improved, and the productivity is improved by caulking the flow dividing plate to the divided body.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIGS. 2 to 4, reference numeral 1 denotes a burner provided with a burner body 2 made of sheet metal and a burner head 3 made of a forged product. The device is shown. The burner head 3 includes a plurality of upper flame outlets 4 and a plurality of lower flame outlets 5 as shown in FIG.
The combustion primary air mixed gas is supplied to the flame ports of each section through two venturi passages 6 and 7 having different paths formed in the burner body 2 to the flame ports of each section. The cross-sectional area of one Venturi passage 6 is formed larger than the cross-sectional area of the other Venturi passage 7, and the gas inlets 8, 9 of the respective passages 6, 7 are used to adjust the amount of primary combustion air to be sucked. A damper (not shown) is attached.

The burner body 2 made of the sheet metal press is shown in FIG.
As shown in the exploded view of FIG. 1, upper and lower divided bodies 2a and 2b and a flow dividing plate 14 are formed, and the upper divided body 2a is formed with upper wall surfaces 6a and 7a of the venturi passages 6 and 7, and Of the venturi passages 6 and 7
Are formed, and the divided bodies 2a, 2b are formed.
The circular burner head mounting portions 12, 1 are formed by opening round holes 10, 11 at one end of
3 was formed. The round holes 10 and 11 are provided in the upper divided body 2a.
Is formed larger than that of the lower divided body 2b,
By superposing these divided bodies 2a and 2b, two venturi passages 6 and 7 are formed, and at the same time, an opening communicating with each venturi passage 6 and 7 is formed between the burner head attachment portions 12 and 13.

The Venturi passage 6 having a large cross-sectional area is connected to the section of the large flame outlet 4, and the Venturi passage 7 having a small cross-sectional area is connected to the small flame outlet 5.
It is preferable to obtain good combustibility according to the flow rate and the flow velocity of the mixed gas, and in order to enable this, the flow dividing plate 14 is interposed between the two divided bodies 2a and 2b. I did it. The flow dividing plate 14 integrally includes a semicircular upper wall 15 defining and defining one venturi passage 6 and a semicircular lower wall 16 defining and defining the other venturi passage 7.
A round hole 1 formed to have an intermediate diameter between the round holes 10 and 11
7 is provided and the periphery thereof is raised as a burner head mounting portion 18. The flow dividing plate 14 is interposed between the divided bodies 2a and 2b and is caulked so that the opening between the burner head mounting portions 12 and 13 is formed. The inner portion and the outer portion of the annular opening 1 are formed by the burner head mounting portion 18 having a raised portion of the flow dividing plate 14.
9 and 20, and the burner body 2 shown in FIGS. 2 to 4 is obtained. By mounting the cylindrical burner head 3 in the openings 19, 20, the small flame outlet extends along the outer peripheral surface of the burner head mounting portion 18 from the venturi passage 7 having a small cross-sectional area through the outer opening 19. 5, and from the venturi passage 6 having a large cross-sectional area, between the burner head mounting portion 13 and the burner head mounting portion 18, and the inner opening 20.
And a supply route from the to the flame outlet 4 is established. A step 21 corresponding to the thickness of the flow dividing plate 14 is provided in the lower divided body 2b so that when the flow dividing plate 14 is interposed, the upper and lower divided bodies 2a and 2b can be caulked without a gap.

The shapes of the burner head mounting portions of the divided bodies 2a and 2b and the flow dividing plate 14 are arbitrary. As shown in FIG. 6, holes 22 corresponding to the openings 19 and 20 are formed in the upper divided body 2a. A step 23 for press-fitting into the round hole 17 of the flow dividing plate 14 is formed, and these divided bodies 2a, 2b are caulked inside the round hole 11 of the lower divided body 2b, or as shown in FIG. In the flow dividing plate 14, an opening 20 is formed around the round hole 17.
Is formed, and the periphery thereof is formed in the lower divided body 2b.
It may be stopped by caulking.

The burner body 2 has an upper divided body 2a forming upper wall surfaces of venturi passages 6 and 7 connected to respective sections of the flame outlet, and a lower divided body 2a forming lower wall surfaces of these venturi passages 6 and 7. It is composed of the divided body 2b and the flow dividing plate 14, and the two venturi passages 6 and 7 are arranged side by side in a horizontal direction. The vertical dimension can be made small and light by sheet metal, and the sectional area of each venturi passage is It can be easily manufactured with a press to the size according to the amount of gas flowing through the system.
When the number of flame outlets is three or more, the number of venturi passages can be changed to three or more so that the combustion primary air mixed gas is individually supplied to each section.

[0011]

As described above, according to the present invention, a burner body having a plurality of venturi passages for supplying a combustion primary air mixed gas to a plurality of divided flame outlets is provided. The upper divided body formed, the lower divided body forming the lower wall surface of each Venturi passage, and the flow dividing plate for individually supplying the primary air mixed gas of the combustion of each Venturi passage interposed between the divided bodies to the section. Since each of the venturi passages can be formed in a perfect circle, it can be made to conform to a perfect circular jet shape of the mixed gas, there is no gap in the venturi passage that generates a vortex, and the negative The pressure is reliably generated, the primary air can be reliably sucked by the ejector effect and the combustibility is improved, and the burner device is lightweight and has a short vertical dimension with multiple venturi passages. The resulting, there are effects such that the cross-sectional area of the venturi passage of each path can be easily manufactured with different combustion having good gas burner.

[Brief description of the drawings]

FIG. 1 is a cutaway side view of a conventional burner device.

FIG. 2 is a cutaway side view showing an embodiment of the present invention.

FIG. 3 is a side view taken along the line 3-3 in FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is an exploded perspective view of the burner body of FIG. 2;

FIG. 6 is a cutaway side view of a modified example of the burner body.

FIG. 7 is a cutaway side view of another modification of the burner body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Burner apparatus, 2 burner bodies, 2a Upper divided body, 2b Lower divided body, 3 burner heads, 4 large flame ports, 5 small flame ports, 6.7 venturi passage, 6a / 7a
Upper wall, 6b ・ 7b Lower wall, 10 ・ 11 ・
17 round hole, 12/13/18 burner head mounting part, 14 split plate, 15 semicircle upper wall, 16 semicircle lower wall,

Claims (4)

[Claims] A burner head formed in a burner head is divided into a plurality of burner heads, and a combustion primary air mixed gas is supplied to each burner head through a plurality of venturi passages formed on a sheet metal burner body and having different paths. In such a burner device, the burner body is formed of upper and lower divided bodies, and an upper divided body is formed with an upper wall surface of each Venturi passage, and a lower divided body is formed with a lower wall surface of each Venturi passage. A multi-supply-path gas burner device, wherein a split plate for individually supplying the combustion primary air mixed gas of each Venturi passage to the divided flame ports is interposed between the upper and lower divided bodies. 2. The gas burner device for a plurality of supply paths according to claim 1, wherein an annular burner head mounting portion is provided on one of the upper and lower divided bodies and the flow dividing plate. 3. The gas burner device according to claim 1, wherein the venturi passages have different passage areas. 4. The gas burner device for a plurality of supply paths according to claim 1, wherein the flow dividing plate is caulked to the divided body.