CN2769701Y - Gas burner - Google Patents

Abstract

A gas burner includes a central chamber having a gas inlet and a first wall with a plurality of gas outlet holes therethrough, the plurality of gas outlet holes arranged in a plurality of vertically spaced apart a circular array; and a peripheral chamber having a gas inlet and a second wall with a plurality of gas outlet apertures therethrough, the plurality of gas outlet apertures being arranged in a plurality of vertically spaced circles. shape array. Also included is an annular mixing chamber located between the first wall and the second wall for containing gas passing through the respective holes, the mixing chamber having a bottom and an open top. The circular arrays are staggered vertically between the two walls. A swirling airflow is introduced into the mixing chamber to produce a quiet, large-volume flame from the top of the opening.

Description

gas burner

technical field

The utility model relates to a gas burner, in which fuel gas is mixed with air in a cooking utensil. The invention relates particularly, but not exclusively, to gas mixing burners intended for low-noise operation.

Background technique

There have been provided gas burners having a plurality of flame exit holes arranged in a circular array, such as the conventional type generally referred to as air jet burners. These burners rely on intermixing of gas and air upstream of the orifice array and can be quite noisy in operation, emitting up to 94dBA. Their use is common in commercial cookers where large flames are required to heat large cooking vessels for high-volume cooking. Domestic use is hampered by noise levels, which would otherwise represent a potential market.

It is an object of the present invention to overcome or at least alleviate the above-mentioned disadvantages and/or more generally to provide an improved gas burner which is able to operate quietly even when producing a sufficient flame.

Utility model content

According to the present invention, there is provided a gas burner comprising: a central chamber having a gas inlet and a first wall with a plurality of gas outlet holes passing through it, said plurality of gas outlet holes arranged in a plurality of vertically spaced circular arrays; and a peripheral chamber having a gas inlet and a second wall with a plurality of gas outlet holes therethrough, the plurality of gas outlet holes arranged as Multiple vertically spaced circular arrays. Also included is an annular mixing chamber positioned between the first wall and the second wall for containing gas passing through the respective holes, the mixing chamber having a bottom and an open top through which the flame rises. The circular array of first walls is vertically staggered with the circular array of second walls.

Preferably, both the first and second walls are substantially cylindrical.

Preferably, the circular arrays are substantially equidistant from each other in the vertical direction.

Preferably, the circular array of first walls is symmetrically staggered with the circular array of second walls.

In a preferred embodiment, the aperture of at least one of the first and second walls extends through said wall in a non-radial direction, so that gas passing through said aperture induces a vortex in the mixing chamber.

More preferably, said aperture extends horizontally through said at least one of the first and second walls.

More preferably, the apertures in said first and second walls extend therethrough in the manner described above.

In a particular configuration, the peripheral chamber has a bottom below and spaced from the bottom of the mixing chamber through which a gas inlet port is provided.

In a particular configuration, the central chamber has a bottom through which a gas inlet is provided.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described more specifically by way of example.

Figure 1 is a perspective view of an embodiment of a gas burner according to the present invention, and illustrates various gas inlet pipes and pilot flame connections in a typical commercial cooker device;

Fig. 2 is a sectional view of the gas burner of Fig. 1;

Figure 3 is a top sectional view of the central portion of the gas burner in Figure 2;

Fig. 4 is another side sectional view of the gas burner in Fig. 1 taken along the right direction of Fig. 2;

Figure 5 is a top plan view of the gas burner of Figure 4; and

6 is a schematic perspective view of a commercial furnace including the gas burner of FIG. 1 .

Detailed ways

Referring first to FIG. 1 , there is shown a gas burner 10 embodying the invention having an air inlet pipe AP opening to the bottom thereof. The air inlet pipe AP includes an air valve AV. A fuel gas inlet pipe FP leads to one side of the burner 10 and includes a main burner valve BV. Upstream of the main burner valve BV is an appliance control valve CV, a pilot valve PV and a flame interruption device FF from which a pilot line PL and a control line CL extend to the burner 10 .

Referring to FIGS. 2 to 5 , the gas burner 10 includes a cylindrical central gas combustion chamber 11 coaxially arranged entirely inside a cylindrical double-walled peripheral air chamber 12 . An annular gas mixing chamber 13 is defined by and located between the central chamber 11 and the peripheral chamber 12 . The mixing chamber 13 has a top opening 28 through which the flame escapes.

The central chamber 11 has a first cylindrical wall 21 formed therethrough with a plurality of holes 17 arranged in three vertically spaced rings or circular arrays. The peripheral chamber 12 also includes a second cylindrical wall 20 having a plurality of holes 16 therethrough. The holes 16 are arranged in four circular arrays, each surrounding the central chamber 11 .

The four circular arrays of holes 16 are regularly spaced with respect to the vertical direction. Similarly, the three circular arrays of holes 17 are equally spaced vertically. The array of holes 17 is symmetrically staggered with the array of holes 16 so that the arrays of holes 16 and the arrays of holes 17 are vertically arranged in an alternating manner. More specifically, each array of holes 17 is vertically centered on the two adjacent arrays of holes 16 surrounding it.

Holes 16 and 17 extend through chamber walls 20 and 21 in a non-radial or helical fashion, as shown in FIG. 3 .

The mixing chamber 13 has a bottom wall 22 on which the central chamber 11 is seated. The combustion gas inlet 14 passes through the center of the bottom wall 22 , and an elbow 23 extends from the inlet 14 to the fuel gas inlet 19 . Through the cylindrical outer wall 24 of the gas burner 10 is an inlet port 19 to which a combustion gas inlet pipe FP is connected.

The peripheral chamber 12 has a bottom wall 25 spaced from below the bottom wall 22 of the mixing chamber 13 . This spacing provides space for the elbow 23 . The bottom wall 25 has a central air inlet 18 to which an air inlet pipe AP is connected. Under the hood 26 is provided a pilot flame 27 which receives fuel gas from the pilot line PL. Control line CL is connected to thermocouple 15 next to pilot flame 27 for flame detection.

FIG. 6 shows a commercial furnace including a gas burner 10 . The oven comprises a recess surrounded by a protruding annular structure 9 serving as a support for a cooking vessel, in particular a pan, in which recess a gas burner 10 is mounted and at the bottom of the recess. Relevant gas and air supply pipelines are arranged in the furnace body.

In operation, fuel gas is delivered under pressure to the fuel gas inlet port 19 and enters the central chamber 11 via the elbow 23 . The fuel gas then enters the mixing chamber 13 through the holes 17 in the direction of the arrow A shown in FIG. 3 . Simultaneously, air is supplied under pressure (for example by an electric fan) to the air inlet 18 and passes around the elbow 23 and the peripheral chamber 12 . The air then enters the mixing chamber 13 through the holes 16 in the direction of the arrow B. The two air flows A and B introduce a counterclockwise swirl of the mixture (fuel gas and air) in the mixing chamber 13 .

The mixture will be ignited for combustion by the pilot flame 27 , creating a flame vortex through the top opening 28 of the mixing chamber 13 . The size of the flame is adjustable by rotating the main burner valve BV and air valve AV which are mechanically linked together for simultaneous operation to maintain the gas/air mixture ratio.

The staggered or alternating arrangement of the rings of holes 16 and 17 in the chamber walls 20 and 21 enables smooth near-laminar mixing between the fuel gas and air in a multilayer manner. This allows for relatively quiet or low noise (84dBA) combustion even with full flame due to reduced turbulence. The deep structure of the mixing chamber 13 in which the gases are mixed and burned also contributes to improved noise prevention performance.

Faster and/or more thorough gas mixing can be ensured, leading to a greater degree of more efficient utilization of the fuel gas and complete combustion, which together lead to significant improvements in heating rate and combustion performance.

The present utility model is given by way of example only, and those skilled in the art can make various modifications and/or variations to these embodiments without departing from the scope of the present utility model specified in the claims. For example, the fuel gas and air inlets may be interchanged so that fuel gas is delivered into the mixing chamber via the peripheral chamber.

Claims (9)

1. gas burner comprises:

Centre chamber with gas access and first wall, described first wall has a plurality of gas outlet holes that pass it, and described a plurality of gas outlet holes are arranged in the circular array that a plurality of perpendicular separations are opened;

Peripheral compartment with gas access and second wall, described second cornice has a plurality of gas outlet holes that pass it, and described a plurality of gas outlet holes are arranged in the circular array that a plurality of perpendicular separations are opened; With

Annular mixing chamber, it is used to hold the gas by each hole between the first wall and second wall, and described mixing chamber has bottom and open top, and flame rises by described open top;

It is characterized in that the circular array of described first wall is vertically staggered with the circular array of second wall.

2. gas burner according to claim 1 is characterized in that, first and second walls all are substantial cylindrical.

3. gas burner according to claim 1 is characterized in that, circular array is vertically roughly spaced apart equally spacedly each other.

4. gas burner according to claim 1 is characterized in that, the circular array of the circular array of first wall and second wall is staggered symmetrically.

5. according to each described gas burner among the claim 1-4, it is characterized in that described wall extension is passed along non-direction radially in the hole of at least one wall in first and second walls, thereby the gas that passes described hole is introduced eddy current in mixing chamber.

6. gas burner according to claim 5 is characterized in that, described at least one wall that described hole is passed in first and second walls flatly extends.

7. gas burner according to claim 5 is characterized in that, the hole in described first and second walls is passed them in this way and extended.

8. gas burner according to claim 1 is characterized in that, described peripheral compartment have under the bottom of mixing chamber and with the bottom that the bottom interval of mixing chamber is opened, pass described bottom and be provided with the gas inlet port.

9. gas burner according to claim 1 is characterized in that, described centre chamber has the bottom, passes described bottom and is provided with the gas inlet port.

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