CN211502899U - Gas stove and stove burner thereof - Google Patents

Abstract

The utility model discloses a gas stove and a stove burner thereof, the stove burner comprises a stove body (1), a fan (3), a gas pipe joint (4) and a metal fiber net (5), a gas premixing channel (2) is formed in the stove body, the head end of the stove body is a burning end and the tail end is a gas supply end, the metal fiber net is installed at the burning end, the fan is installed at the gas supply end, and the air outlet of the fan leads in mixed gas towards the gas premixing channel; the gas pipe joint is arranged at one side of an air inlet (321) of the fan to introduce gas. The utility model discloses a gas-cooker and cooking utensils furnace end can realize the burning in full premix, accomplishes the low emission of harmful substance, forms the high-efficient burning of flameless radiation, and combustion efficiency is higher.

Description

Gas stove and stove burner thereof

Technical Field

The utility model belongs to the gas cooking utensils field.

Background

In the stove burner of the existing gas stove, gas is introduced into the stove burner through an injection pipe, partial primary air is introduced simultaneously, partial secondary air is supplemented when the stove burner is combusted, however, due to insufficient air quantity proportion, complete combustion is difficult to achieve, harmful substances are discharged more, the combustion intensity is low, the heating is uneven, the flame center temperature is high, the overall heating efficiency of the stove is low, and the cooking effect is poor.

Research personnel have carried out various optimization, improvements to furnace end structural design, but all the effects are not good. Therefore, how to achieve more efficient combustion, energy conservation, environmental protection and low emission is a key theme and development direction in the field of gas cookers.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned not enough or defect among the prior art, the utility model provides a gas-cooker and cooking utensils furnace end thereof can realize having the low emission of harmful substance, forms the high-efficient burning of flameless radiation.

In order to achieve the above object, the utility model provides a stove burner, include:

the gas premixing device comprises a furnace body, a gas premixing channel, a gas inlet pipe, a gas outlet pipe and a gas inlet pipe, wherein the gas premixing channel is formed in the furnace body;

a metal fiber mesh mounted at the combustion end;

the fan is arranged at the gas supply end, and the air outlet of the fan leads the mixed gas into the gas premixing channel; and

and the gas pipe joint is arranged on one side of the air inlet of the fan to guide in gas.

In some embodiments, the blower includes an air inlet pipe, the air inlet pipe is a venturi pipe and sequentially comprises a contraction section, a mixing section and a diffusion section along the airflow direction, and the gas pipe joint extends into the pipe cavity of the mixing section from the peripheral wall of the mixing section.

In some embodiments, the gas pipe joint is provided with a gas proportional valve which is controlled in linkage with a driving motor of the fan.

In an optional embodiment, the gas supply end inlet and the combustion end outlet of the gas premixing channel are both vertical openings, the air outlet of the fan is vertically connected to the gas supply end inlet, and the metal fiber net covers the combustion end outlet.

In an optional embodiment, the gas supply end inlet of the gas premixing channel is a horizontal opening, the combustion end outlet is a vertical opening with an upward opening, the air outlet of the fan is horizontally connected to the gas supply end inlet, and the metal fiber net covers the combustion end outlet.

In an alternative embodiment, the hob head further comprises a catalyst carrier arranged directly above the combustion end outlet.

In an optional embodiment, the stove burner further comprises a metal mesh support, the metal fiber mesh is detachably mounted on the metal mesh support and covers the combustion end outlet, and the catalyst carrier is detachably mounted on the metal mesh support and is vertically arranged above the metal fiber mesh at intervals.

In some embodiments, the furnace body is in a pipe shape or a funnel shape, and the cross-sectional area of the gas premixing channel is gradually increased from the inlet of the gas supply end to the outlet of the combustion end.

Furthermore, the utility model also provides a gas stove, the gas stove includes foretell cooking utensils furnace end.

In some embodiments, the gas range further comprises a fully premixed combustion controller configured to:

and correspondingly adjusting the power of a driving motor of the fan according to the opening degree of a gas proportional valve on the gas pipe joint.

In some embodiments, the gas range further comprises a gas switch knob for controlling the fire power of the stove burner, and the fully premixed combustion controller is further configured to:

the opening degree of the gas proportional valve and the rotating speed of the motor are proportionally controlled according to the rotating angle position of the gas switch knob.

The utility model discloses an among the cooking utensils furnace end, introduce the mist of rated ratio's air and gas through the fan, the gas in the furnace shaft mixes the passageway intensive mixing in advance, is lighted through the metal fiber net at the burning end of furnace shaft, forms the complete premix burning. Resistance brought by a metal net can be overcome through a built-in fan, the airflow velocity can be increased on the basis of reasonably controlling the air coefficient, the retention time of gas in a high-temperature area is greatly shortened, the temperature of a combustion area can be controlled through a metal fiber net, the temperature field of combustion is uniform as much as possible, the temperature peak value is reduced as much as possible, low CO and NOx double-low emission and flameless radiation efficient combustion are realized, and the combustion efficiency is high.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a stove burner according to a first embodiment of the present invention, wherein the stove burner is horizontal;

FIG. 2 is a schematic structural view of the shaft shown in FIG. 1;

fig. 3 is a schematic structural view of a stove burner according to a second embodiment of the present invention, wherein the stove burner is vertical;

FIG. 4 is a schematic structural view of the shaft shown in FIG. 3;

fig. 5 is a schematic structural view of a stove burner according to a third embodiment of the present invention; and

fig. 6 is a schematic block diagram of combustion control of a gas range according to an embodiment of the present invention.

Description of reference numerals:

1 furnace body and 2 gas premixing channels

3 blower 4 gas pipe joint

5 Metal fiber net 6 metal net support

7 catalyst carrier

21 gas supply end inlet and 22 combustion end outlet

31 driving motor 32 air inlet pipe

321 air inlet 322 mixing section

41 gas proportional valve

100 gas switch knob 200 full premix combustion controller

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to improve the combustion efficiency of the stove burner and reduce harmful emissions of combustion, the utility model provides a novel stove burner. In various embodiments as shown in fig. 1-5, the cooktop burners each include:

the gas premixing furnace comprises a furnace body 1, wherein a gas premixing channel 2 is formed in the furnace body 1, the head end of the furnace body 1 is a combustion end, and the tail end of the furnace body 1 is a gas supply end;

a metal fiber net 5, the metal fiber net 5 is installed at the burning end;

the fan 3 is arranged at the gas supply end, and the air outlet of the fan 3 leads in the mixed gas towards the gas premixing channel 2; and

and the gas pipe joint 4 is arranged on one side of the air inlet 321 of the fan 3 so as to guide gas into the fan 3.

The utility model discloses an among the cooking utensils furnace end, having carried out the design of principle subversion formula to the furnace end structure, adopting the similar stack 1 that draws the injection pipe of shape, gas and air mix the passageway 2 in advance with the gas of rated ratio in stack 1 intensive mixing, then form the complete premixed burning at the combustion end, and the intensity of combustion is high and discharge few, is showing the incomplete combustion heating of low intensity who is different from current furnace end.

On the basis of the simple structure of furnace body 1, set up fan 3, the burning end of furnace end has set up metal fiber mesh 5 to make the furnace end structure simplify greatly, through metal fiber mesh 5, make flame adhere to on metal fiber mesh 5, the mist evenly diffuses on the wire side, can form flameless effect, the burning is stable and distribute evenly, avoids local high temperature to exist, reduces NOx's existence. The resistance brought by the metal fiber net 5 can be overcome through the fan 3, especially the air supply is increased, the combustion efficiency is improved, and the emission of CO is less because of sufficient air supply.

The NOx generated during burner combustion is mainly thermal NOx, rapid NOx and fuel NOx, wherein the thermal NOx accounts for about 90% -95%, the rapid NOx accounts for about 5%, and the fuel NOx is little, so that the influence of the NOx is negligible. Therefore, the reduction of the amount of NOx produced is important for reducing the thermal NOx. The utility model discloses in, adopt complete premixed combustion, gas and air carry out homogeneous mixing in advance before catching fire, accomplish the burning in the twinkling of an eye, its flame is very short invisible even, and fire hole hot strength is very high, does not have the incomplete combustion phenomenon of chemistry almost, therefore combustion temperature relative diffusion burning and local premixed combustion are higher. The reduction of the amount of thermal NOx generated is mainly realized by properly controlling the temperature and the air coefficient alpha and shortening the retention time of the gas in a high-temperature area. Specifically, the mixed gas flow of gas and air is introduced through the fan 3, on the basis of reasonably controlling the air coefficient, the flow velocity of the gas flow can be increased, the retention time of the gas in a high-temperature area is greatly shortened, the temperature of a combustion area can be controlled through the metal fiber net 5, the temperature field of combustion is uniform as much as possible, the temperature peak value is reduced as much as possible, and therefore the ultralow NOx discharge capacity is achieved.

When the metal fiber net 5 is installed on the combustion end outlet 22, the combustion end outlet 22 is covered by the tiled metal fiber net, so that the mixed gas is uniformly diffused on the net surface, the flame is attached to the metal fiber net 5 to form a flameless effect, and the combustion is stable and uniform, and the local high temperature is avoided. For easy mounting and dismounting, the combustion end may be further mounted with a metal mesh support 6, and the metal fiber net 5 may be detachably mounted on the metal mesh support 6 and cover the combustion end outlet 22. The metal net support 6 can be an annular iron block and is stably placed on the annular end face of the combustion end depending on self weight.

In one embodiment shown in fig. 5, the stove burner may further comprise a catalyst carrier 7 disposed directly above the combustion end outlet 22, and the catalyst carrier 7 may further absorb harmful exhaust gas or react with the harmful exhaust gas to generate harmless substances to be discharged. Specifically, as shown in fig. 5, the metal fiber net 5 is detachably mounted on the metal net support 6 and covers the combustion end outlet 22, and the catalyst carrier 7 is detachably mounted on the metal net support 6 and is disposed vertically above the metal fiber net 5 at a spacing. It will be understood by those skilled in the art that the catalyst carrier 7 may be any catalyst suitable for absorbing reaction with flue gas, including but not limited to ceramic matrix catalysts, etc., and will not be described in detail herein.

In order to realize the fully premixed combustion, before the gas is ignited, the gas and the air need to be fully mixed, and then the mixed gas is discharged and ignited. In the present invention, the gas and air are primarily mixed at the tail end of the furnace body 1 (i.e., the gas supply end having the gas supply end inlet 21), and then are sufficiently mixed in the gas premixing passage 2 in the furnace body 1, and finally discharged and ignited at the combustion end outlet 22.

At the air supply end, the fan 3 and the gas pipe joint 4 may be installed at appropriate positions as needed to introduce air and gas, respectively, toward the air supply end of the gas premixing passage 2. In this embodiment, air is blown into the gas premix channel 2 by the fan 3, the gas having a flow velocity to overcome the resistance of the metal fiber web 5 at the combustion end outlet 22.

Referring to fig. 1, in the present embodiment, the gas pipe joint 4 is connected to the upstream side of the air inlet of the fan 3, and the air and the gas are stirred and mixed in the fan, so that the mixing is more uniform and the combustion is more sufficient. The air is used for ejecting fuel gas, the air output of the fan 3 is controlled, the rated air-fuel ratio can be obtained, and the best combustion state is ensured. In order to achieve more complete mixing of air and fuel gas in the blower, more specifically, the blower 3 in fig. 1 includes an air inlet pipe 32, the air inlet pipe 32 is a venturi pipe and sequentially includes a contraction section, a mixing section 322 and a diffusion section along the airflow direction, and a fuel gas pipe joint 4 extends into the mixing section pipe cavity from the peripheral wall of the mixing section 322.

After passing through the contraction section of the air inlet pipe 32, the air flowing in from the air inlet 321 of the fan 3 increases in flow rate and pressure, enters the inner cavity of the mixing section 322 to be mixed with the fuel gas introduced by the fuel gas pipe joint 4, and then the mixed gas enters the downstream of the mixing section 322, after undergoing a diffusion process, the air and the fuel gas are mixed more uniformly, and secondary mixing is formed in the air inlet pipe 32. After entering the gas premixing channel 2, the mixed gas undergoes a sufficient diffusion mixing process, and then flows out from the combustion end outlet 22 at a certain flow rate, and is ignited through the metal fiber net 5, and the ignited gas flame is controlled on the net surface of the metal fiber net 5 to perform infrared combustion, so that low-emission flameless combustion is realized.

The shaft 1 needs to be designed so that the mixing of air and gas is sufficient and the outlet flow rate is maintained within a certain range of velocities. In this embodiment, the gas premixing channel 2 can be designed to be relatively short, since a good mixing of air and gas is already obtained in the fan 3. Alternatively, the cross-sectional area of the gas premixing passage 2 is designed to increase from the gas supply end to the combustion end, so that the flow velocity of the gas can be reduced, diffusion is formed, and the gas mixing is more sufficient.

As shown in fig. 1 and 2, in the illustrated embodiment, the furnace shell 1 has a pipe shape, a small tail end and a large head end. In fig. 3 to 5, the furnace body 1 is funnel-shaped and has an opening with a large top and a small bottom. Because the shaft 1 can be designed to be short, it can be horizontally placed as shown in fig. 1 and 2, i.e., horizontally placed under the cooking bench, or vertically placed under the cooking bench as shown in fig. 3 to 5. Can be designed according to the specific installation space structure.

When the furnace shell 1 is horizontally arranged, referring to fig. 1 and 2, the gas supply end inlet 21 of the gas premixing channel 2 is formed as a horizontal opening (i.e. the normal line of the end surface of the gas supply end inlet 21 is a horizontal straight line) and the combustion end outlet 22 is a vertical opening with an upward opening (i.e. the normal line of the end surface of the combustion end outlet 22 is a vertical line). At this time, the air outlet of the fan 3 is horizontally connected to the air supply end inlet 21, and the metal fiber net 5 is laid on the combustion end outlet 22.

When the furnace body 1 is vertically arranged, referring to fig. 3 to 5, the air supply end inlet 21 and the combustion end outlet 22 of the air premixing channel 2 are both vertically opened, the air outlet of the fan 3 is vertically connected to the air supply end inlet 21, and the metal fiber mesh 5 is horizontally laid on the combustion end outlet 22.

In the present embodiment, the gas pipe joint 4 may be provided with a gas proportional valve 41 (not shown in fig. 1). The gas quantity entering the premixer 7 through the gas pipe joint 4 can be adjusted through the gas proportional valve 41, so that on the basis of controlling the air quantity of the air outlet of the fan 3, the rated air-fuel ratio is obtained in a matching manner, the complete premixed combustion with the optimal proportion is realized, and the combustion state is optimal. The gas proportional valve 41 may be various valve bodies capable of adjusting the opening degree, in particular, an electromagnetic proportional valve capable of realizing accurate electric control, but is not limited thereto. In the present embodiment, the gas proportional valve 41 is designed to be controlled in conjunction with the drive motor 31 of the fan 3, as will be discussed further below. The gas proportional valve 41 is not limited to be a part of the stove burner, and the gas proportional valve 41 may also be disposed at other parts of the gas pipeline, not limited to be disposed near the furnace body 1, as long as it can perform the function of adjusting the gas flow. Alternatively, a flow meter or the like may be provided in the gas pipe joint 4 or the gas pipe.

In addition, the utility model also provides a gas-cooker of using above-mentioned cooking utensils furnace end. In order to achieve a completely premixed combustion when the stove burner is in use, referring to fig. 6, the gas stove or stove burner should further comprise:

a full premixed combustion controller 200, the full premixed combustion controller 200 configured to:

the power of the driving motor 31 of the fan 3 is correspondingly adjusted according to the opening degree of the gas proportional valve 41 on the gas pipe joint 4.

The power of the drive motor 31 is indicative of the rotational speed of the motor 3. In this way, the fully premixed combustion controller 200 can realize the correlated control of the opening degree of the gas proportional valve 41 and the rotation speed of the fan 3, so as to obtain a certain proportion of gas and air, i.e. a rated air-fuel ratio. Specifically, the opening information of the gas proportional valve 41 can be obtained first, and then the power of the driving motor 31 of the fan 3 is adjusted, that is, the rotation speed of the fan 3 is adjusted, so as to realize the matching rotation speed, thereby obtaining the specific air outlet air quantity. Of course, the set correlation control can also be established directly between the gas proportional valve 41 and the drive motor 31 by means of an electronic control unit.

Still further, the gas range further includes:

the gas switch knob 100 is used for controlling the fire power of the stove burner; and

the full premixed combustion controller 200, further configured to:

the opening degree of the gas proportional valve 41 and the rotation speed of the motor 3 are proportionally controlled according to the rotation angle position of the gas switch knob 100.

The gas switch knob 100 may be various conventional fire power adjusting knobs, and the fully premixed combustion controller 200 may be disposed in the knob or may be separately disposed. When the stove is used, a user can adjust the required firepower through the gas switch knob 100, the fully premixed combustion controller 200 can acquire information such as the rotation angle and the position of the gas switch knob 100, and then the opening of the gas proportional valve 41 can be adjusted according to the information, and the driving motor 31 of the fan 3 is controlled in a matching mode.

To sum up, the utility model provides an use metal fiber full premix combustor's implementation mode on cooking utensils has realized the full premix burning, can realize low CO and NOx two low emission and the high-efficient burning of flameless radiation simultaneously, and combustion efficiency is high, make full use of the ultralow advantage of discharging of full premix burning, utilize metal fiber net simultaneously, can make flame adhere to on the fibre net, form flameless effect, utilize the radiation heat transfer, heat the bottom of a boiler more evenly, promote the overall efficiency of culinary art effect and cooking utensils.

Accordingly, advantages of the present invention include, but are not limited to: resistance brought by a metal mesh can be overcome through the built-in fan, the gas proportional valve accurately controls gas supply, and large and small fires are more accurate; the air and the fuel gas are stirred and mixed in the fan, so that the mixing is more uniform and the combustion is more sufficient; the fan rotating speed and the proportional valve current are controlled through the electric control board, and optimal air-fuel ratio configuration is achieved.

It should be particularly noted that other configurations and functions of the gas range according to the embodiments of the present invention are known to those skilled in the art, and are not described herein in detail in order to reduce redundancy.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (11)

1. A stove burner, characterized in that, stove burner includes:

the gas premixing device comprises a furnace body (1), wherein a gas premixing channel (2) is formed in the furnace body (1), the head end of the furnace body (1) is a combustion end, and the tail end of the furnace body is a gas supply end;

a metal fiber mesh (5) mounted at the combustion end;

the fan (3) is arranged at the gas supply end, and the mixed gas is introduced from the air outlet of the fan (3) towards the gas premixing channel (2); and

and the gas pipe joint (4) is arranged on one side of the air inlet (321) of the fan (3) to introduce gas.

2. Stove burner according to claim 1, characterized in that the fan (3) comprises an air inlet pipe (32), the air inlet pipe (32) is a venturi pipe and comprises a contraction section, a mixing section (322) and a diffusion section in the air flow direction in sequence, and the gas pipe joint (4) extends from the peripheral wall of the mixing section (322) into the mixing section pipe cavity.

3. Stove burner according to claim 1, characterized in that the gas pipe connection (4) is provided with a gas proportional valve (41) which is controlled in conjunction with a drive motor (31) of the fan (3).

4. The cooking stove burner according to claim 1, wherein the gas supply end inlet (21) and the combustion end outlet (22) of the gas premixing channel (2) are vertical openings, the air outlet of the fan (3) is vertically connected to the gas supply end inlet (21), and the metal fiber mesh (5) covers the combustion end outlet (22).

5. The cooking hob burner according to claim 1, characterized in, that the gas supply end inlet (21) of the gas premixing channel (2) is a horizontal opening and the combustion end outlet (22) is a vertical opening with an upward opening, the air outlet of the fan (3) is horizontally connected to the gas supply end inlet (21), the metal fiber mesh (5) is laid over the combustion end outlet (22).

6. Stove top according to claim 4 or 5, characterized in that the stove top further comprises a catalyst carrier (7) arranged directly above the combustion end outlet (22).

7. The hob burner according to claim 6, characterized in, that the hob burner further comprises a metal mesh support (6), the metal fiber mesh (5) being detachably mounted on the metal mesh support (6) and covering the combustion end outlet (22), the catalyst carrier (7) being detachably mounted on the metal mesh support (6) and being arranged vertically spaced above the metal fiber mesh (5).

8. Stove burner according to claim 4 or 5, characterized in that the shaft (1) is pipe-shaped or funnel-shaped, the cross-sectional area of the gas premixing channel (2) increasing from the gas supply end inlet (21) to the combustion end outlet (22).

9. A gas stove characterized in that the gas stove comprises the stove burner according to any one of claims 1 to 8.

10. Gas burner according to claim 9, characterized in that it further comprises a fully premixed combustion controller (200), said fully premixed combustion controller (200) being configured to:

and correspondingly adjusting the power of a driving motor (31) of the fan (3) according to the opening degree of a gas proportional valve (41) on the gas pipe joint (4).

11. The gas range of claim 10, further comprising a gas switch knob (100) for controlling a magnitude of fire of the cooktop burner, the fully premixed combustion controller (200) further configured to:

and proportionally controlling the opening degree of the gas proportional valve (41) and the rotating speed of the fan (3) according to the rotating angle position of the gas switch knob (100).

Images