CN111853859B

CN111853859B - Burner air intake systems for cooktops

Info

Publication number: CN111853859B
Application number: CN202010763167.9A
Authority: CN
Inventors: 卢楚鹏; 林刚
Original assignee: Guangdong Vanward New Electric Co Ltd
Current assignee: Guangdong Vanward New Electric Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2025-03-11
Anticipated expiration: 2040-07-31
Also published as: CN111853859A

Abstract

The present invention discloses a burner air intake system for a stove, including a burner head and an air intake valve, wherein two or more ejector tubes are arranged on the burner head, and a plurality of nozzles are arranged on the air intake valve, wherein the nozzles correspond to the ejector tubes one by one, and the nozzles extend into the corresponding ejector tubes respectively; wherein at least two nozzles are provided with air induction holes, and the total areas of the air induction holes provided on different nozzles are different. In the burner air intake system for a stove of the present solution, the total areas of the air induction holes provided on different nozzles are different, thereby introducing different amounts of air, thereby achieving different air-fuel ratios of the mixed gas, and obtaining mixed gas of multiple different concentrations. The burner air intake system for a stove of the present solution can be used to achieve a combustion mode of the burner with alternating thick and thin gases, reduce the combustion temperature, and make the gas burn more fully, thereby suppressing the generation of nitrogen oxides.

Description

Burner air inlet system for kitchen range

Technical Field

The invention relates to the field of fuel gas, in particular to a burner air inlet system for a kitchen range.

Background

The burner of the existing gas cooker has the advantages that the concentration of the gas coming out of the fire holes of the same fire cover is the same, the fire power is large and concentrated, the combustion temperature is high, the insufficient combustion is easy to be caused, and more gas such as carbon monoxide, nitrogen oxides and the like which have great harm to human bodies is generated in the combustion process. With the arrival of world energy crisis and the improvement of environmental awareness, there are increasing demands on the efficiency and the emission of gas cookers, and further improvements on the existing gas cookers are required to meet the demands of low nitrogen oxide emission.

On the basis, the applicant proposes that two fire holes are arranged on a fire cover at intervals, mixed fuel gas with different concentrations is respectively introduced into the two fire holes, the purpose of thick and thin combustion is achieved in a thick and thin alternate mode, the combustion temperature is reduced, the fuel gas is combusted more fully, and the generation of nitrogen oxides is restrained. Therefore, on the premise of not adding a gas storage device, the air inlet system of the existing burner needs to be improved so as to obtain mixed gas with different concentrations.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a burner air inlet system for a kitchen range, which introduces different amounts of air through an air inlet hole during operation to obtain mixed fuel gas with different concentrations.

The burner air inlet system for the kitchen range comprises a burner, wherein two or more than two injection pipes are arranged on the burner, a plurality of nozzles are arranged on the air inlet valve, the nozzles correspond to the injection pipes one by one, the nozzles extend into the corresponding injection pipes respectively, at least two nozzles are provided with air guiding holes, and the total areas of the air guiding holes formed in different nozzles are different.

The burner air inlet system for the kitchen range has the advantages that the burner air inlet system for the kitchen range is at least provided with the following advantages that the total areas of the air guide holes formed in different nozzles are different, so that different amounts of air are introduced, different air-fuel ratios of mixed fuel gas are realized, and multiple mixed fuel gas with different concentrations are obtained.

The combustor air inlet system for the kitchen range can be used for realizing a main combustor alternate-thick-thin combustion mode, reducing the combustion temperature, enabling the gas combustion to be more sufficient and inhibiting the generation of nitrogen oxides.

According to the burner air inlet system for the kitchen range, the air guiding holes comprise a thick flame air guiding hole and a thin flame air guiding hole, the thick flame air guiding hole and the thin flame air guiding hole are respectively arranged on different nozzles, and the total area of the thin flame air guiding hole is larger than that of the thick flame air guiding hole. The total area of the thick flame air-guiding holes is smaller, the amount of the introduced air is less, the concentration of the mixed fuel gas is high, thick flame with higher temperature is generated after combustion, the total area of the thin flame air-guiding holes is larger, the amount of the introduced air is more, the concentration of the mixed fuel gas is low, and thin flame with lower temperature is generated after combustion.

According to the burner air inlet system for the kitchen range, the number of the air guide holes on the nozzle is multiple, the air guide holes are distributed on the nozzle in a multi-surface surrounding mode, and air enters the nozzle from multiple directions and is uniformly mixed with fuel gas.

According to the burner air inlet system for a kitchen range of the first aspect of the invention, the distances from the plurality of air inducing holes to the outlets of the nozzles are equal.

According to the burner air inlet system for the kitchen range of the first aspect of the invention, the plurality of air inducing holes are divided into a plurality of groups, and distances between the air inducing holes of different groups and the outlets of the nozzles are different. Different amounts of air can be introduced for multiple times through multiple groups of air guide holes with different distances, so that mixed fuel gas with different concentrations is obtained.

According to the burner air inlet system for the kitchen range, provided by the first aspect of the invention, the injection pipe is provided with the injection pipe air hole. The air holes of the injection pipe have the same effect as the air guiding holes, and are used for introducing air. The air holes of the injection pipe are formed in part of the injection pipe, so that the concentration of the fuel gas in the injection pipe can be changed, and a plurality of mixed fuel gases with different concentrations can be obtained.

Further, the air guiding hole and the air guiding hole of the injection pipe are in any one of a round shape, an oval shape and a polygonal shape, and are convenient to process. Wherein the polygon includes triangle, diamond, rectangle, square, hexagon, etc.

According to the burner air inlet system for the kitchen range, which is disclosed by the first aspect of the invention, the ejector pipe is provided with the air door plate with the adjustable opening. This design can also be through adjusting the air-fuel ratio of air flap further to the mixed gas fine setting, through the aperture size of changing the air flap, realizes the further adjustment of mixed gas, and the burning of the thick and thin flame of more accurate control ensures going on smoothly of thick and thin burning.

According to the burner air inlet system for the kitchen range, the nozzle penetrates through the air door plate, and the distance of the nozzle penetrating into the injection pipe is 1mm-5mm, preferably 3mm, and the distance ensures that fuel gas input by the nozzle smoothly enters the injection pipe.

According to the burner air inlet system for the kitchen range, one or more valve switches are arranged on the air inlet valve. The number of the valve switches can be adjusted according to the actual situation, and one valve switch can independently control one nozzle or simultaneously control a plurality of nozzles.

According to the burner air inlet system for the kitchen range, the number of the valve switches is equal to that of the nozzles, each valve switch independently controls one nozzle, and control accuracy is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of a burner air intake system for a cooktop of the present invention;

FIG. 2 is a cross-sectional view of the burner air intake system for the cooktop of FIG. 1;

Fig. 3 is a schematic view of another intake valve according to the present invention.

Reference numerals illustrate:

An intake valve 100, a first nozzle 110, a light flame air introduction hole 111, a second stage air introduction hole 112, a second nozzle 120, a third nozzle 130, a thick flame air introduction hole 131, a first valve switch 140, and a second valve switch 150;

The device comprises a furnace end 200, a first injection pipe 210, a throttle plate 211, an injection pipe air hole 212, a second injection pipe 220, a third injection pipe 230, an inner ring mixing cavity 240, an intermediate ring mixing cavity 250 and an outer ring mixing cavity 260;

An inner ring fire cover 300;

An outer ring flame cover 400, a thick flame hole 410, and a thin flame hole 420.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements 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 description of the present invention, several means one or more, and plural means two or more. The description of first, second, and third is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1, the burner air intake system for a kitchen range provided by the present invention includes a burner 200 and an air intake valve 100. The furnace end 200 is provided with three injection pipes, namely a first injection pipe 210, a second injection pipe 220 and a third injection pipe 230, as shown in fig. 1, the air inlet valve 100 is provided with a first nozzle 110, a second nozzle 120 and a third nozzle 130 which are in one-to-one correspondence with the three injection pipes, and the nozzles respectively extend into the corresponding injection pipes. Wherein, the first nozzle 110 and the third nozzle 130 are respectively provided with an air guiding hole, and the total areas of the air guiding holes provided on the first nozzle 110 and the third nozzle 130 are different, and the first nozzle 110 and the third nozzle 130 can respectively introduce different amounts of air through the air guiding holes with different total areas, so that the air-fuel ratios of the mixed fuel gas in the first injection pipe 210 and the mixed fuel gas in the third injection pipe 230 are different, and two mixed fuel gas with different concentrations are obtained. The combustor air inlet system for the kitchen range can be used for realizing a main combustor alternate-thick-thin combustion mode, reducing the combustion temperature, enabling the gas combustion to be more sufficient and inhibiting the generation of nitrogen oxides.

Specifically, the air introduction holes include a thick flame air introduction hole 131 and a thin flame air introduction hole 111. In the present embodiment, the air guiding hole on the first nozzle 110 is a light flame air guiding hole 111, and the air guiding hole on the third nozzle 130 is a thick flame air guiding hole 131. Wherein, the light flame induced holes 111 can be increased in number or in aperture to achieve the result that the total area of the light flame induced holes 111 is larger than the total area of the thick flame induced holes 131. As in the present embodiment, the aperture of the light flame inducing aperture 111 is larger than the aperture of the thick flame inducing aperture 131. Wherein, the aperture of the thick flame induced-draft hole 131 is 2-3.5mm, preferably 2.5mm, and the aperture of the thin flame induced-draft hole 111 is 3.2-4.5mm, preferably 3.8mm. The thick flame air-guiding hole 131 has small aperture, less amount of air introduced, high concentration of mixed fuel gas, and generates thick flame with higher temperature after combustion, the thin flame air-guiding hole 111 has large aperture, more amount of air introduced, low concentration of mixed fuel gas, and generates thin flame with lower temperature after combustion.

Further, the first nozzle 110 and the third nozzle 130 are respectively provided with a plurality of air guiding holes, and the air guiding holes are distributed on the nozzles in six-sided surrounding mode, so that air enters the nozzles from a plurality of directions and is uniformly mixed with fuel gas. The air inducing holes of the scheme are not limited to six-face surrounding distribution on the nozzle, and can be four-face surrounding, five-face surrounding or eight-face surrounding and other conditions.

Further, as shown in fig. 1, the distances from the plurality of thick flame air guiding holes 131 to the outlet of the third nozzle 130 are equal, and are concentrically distributed on the third nozzle 130.

As shown in fig. 3, the first nozzle 110 is provided with two sets of air guiding holes, one set is a light flame air guiding hole 111, the other set is a secondary air guiding hole 112, and the secondary air guiding hole 112 is located between the light flame air guiding hole 111 and the burner 200. Through the multiple groups of air guiding holes with different distances, the number of the air guiding holes can be increased, and meanwhile, different amounts of air can be introduced for multiple times, so that mixed fuel gas with different concentrations can be obtained. As in the present embodiment, the first nozzle 110 may introduce more air multiple times through the two sets of the light flame induced air holes 111 and the secondary induced air holes 112, thereby obtaining the mixed gas having a different concentration from the third nozzle 130. In this embodiment, only two sets of air guiding holes are provided on the first nozzle 110, and it is easy to think that in other embodiments, more sets of air guiding holes may be provided on the first nozzle 110, or multiple sets of air guiding holes may be provided on other nozzles.

As shown in fig. 1, in this embodiment, an ejector air hole 212 is formed in the first ejector 210. The ejector tube air holes 212 act in concert with the air holes in the nozzle, both for air intake. By providing the air holes 212 of the injection pipe on part of the injection pipe, the concentration of the fuel gas in the injection pipe can be changed, and a plurality of mixed fuel gases with different concentrations can be obtained. It is readily contemplated that in other embodiments, the ejector tube air holes may be formed in other ejector tubes.

Specifically, the shape of the air guiding hole and the air guiding hole of the injection pipe is any one of a circle, an ellipse and a polygon, wherein the polygon can be triangle, diamond, rectangle, square, hexagon and the like. The air guiding hole and the air guiding hole of the injection pipe are preferably round, so that the processing is convenient.

Further, the ejector pipe is further provided with a damper plate 211 with an adjustable opening. Besides the air-fuel ratio of the mixed gas is adjusted through the air guiding hole and the air guiding hole of the injection pipe, the design can further finely adjust the air-fuel ratio of the mixed gas through the adjusting air door plate 211, the further adjustment of the mixed gas is realized through changing the opening degree of the air door plate 211, the combustion of the thick flame and the thin flame is controlled more accurately, and smooth progress of the thick combustion and the thin combustion is ensured.

As shown in FIG. 2, the nozzle passes through the air door plate, and the distance that the nozzle goes deep into the injection pipe is 1mm-5mm, preferably 3mm, and the distance ensures that the fuel gas input by the nozzle smoothly enters the injection pipe.

Further, one or more valve switches 140, 150 are also provided on intake valve 100. The number of the valve switches 140, 150 can be adjusted according to the actual situation, and in this embodiment, the intake valve 100 is provided with two first valve switches 140 and second valve switches 150, wherein the first valve switch 140 controls the second nozzle 120 separately, and the second valve switch 150 controls the first nozzle 110 and the third nozzle 130 simultaneously.

It is readily appreciated that in other embodiments, the number of valve switches may also be equal to the number of nozzles, one for each valve switch independently, improving the accuracy of the control.

The burner embodiments provided in this embodiment include a primary burner and a secondary burner, it being readily appreciated that in other embodiments, only two injection tubes, and corresponding two nozzles, may be provided with only one burner.

A burner air intake system for a hob according to an embodiment of the present invention is described in detail below with reference to fig. 1 to 3 in a specific embodiment. It is to be understood that the following description is exemplary only and is not intended to limit the invention in any way.

Referring to fig. 1 and 2, the present invention provides an application embodiment of a burner air intake system for a cooking appliance, which includes the burner air intake system for a cooking appliance, an inner annular fire cover 300 and an outer annular fire cover 400.

The furnace end 200 is provided with three injection pipes of a first injection pipe 210, a second injection pipe 220 and a third injection pipe 230. The furnace end 200 is also provided with an inner ring mixing cavity 240, an intermediate ring mixing cavity 250 and an outer ring mixing cavity 260 which are mutually independent, wherein the first injection pipe 210 is communicated with the outer ring mixing cavity 260, the second injection pipe 220 is communicated with the inner ring mixing cavity 240, and the third injection pipe 230 is communicated with the intermediate ring mixing cavity 250. An inner ring fire cover 300 is covered above the inner ring mixing chamber 240, and an outer ring fire cover 400 is covered above the middle ring mixing chamber 250 and the outer ring mixing chamber 260. The outer ring flame cover 400 is provided with thick flame holes 410 and light flame holes 420 at intervals, the thick flame holes 410 are communicated with the middle ring mixing cavity 250, and the light flame holes 420 are communicated with the outer ring mixing cavity 260, as shown in fig. 2.

The middle ring mixing chamber 250, the outer ring mixing chamber 260 and the outer ring fire cover 400 form a main burner, the inner ring mixing chamber 240 and the inner ring fire cover 300 form an auxiliary burner,

The air inlet valve 100 is provided with a first nozzle 110, a second nozzle 120 and a third nozzle 130, wherein the first nozzle 110 extends into the first injection pipe 210, the second nozzle 120 extends into the second injection pipe 220, the third nozzle 130 extends into the third injection pipe 230, and the nozzles are connected in a one-to-one correspondence. The inlet valve 100 is further provided with a first valve switch 140 and a second valve switch 150, wherein the first valve switch 140 independently controls the second nozzle 120 to supply fuel gas to the inner ring mixing chamber 240, and the second valve switch 150 simultaneously controls the first nozzle 110 and the third nozzle 130 to supply fuel gas to the middle ring mixing chamber 250 and the outer ring mixing chamber 260.

The first nozzle 110 and the third nozzle 130 are respectively provided with a plurality of air guiding holes, and the air guiding holes are distributed on the first nozzle 110 and the third nozzle 130 in six-face surrounding mode, so that air enters the nozzles from a plurality of directions and is uniformly mixed with fuel gas to obtain mixed fuel gas. The air guiding holes on the first nozzle 110 are light flame air guiding holes 111, and the air guiding holes on the third nozzle 130 are thick flame air guiding holes 131. The aperture of the light flame induced-draft hole 111 is larger than that of the thick flame induced-draft hole 131, so that the total area of the light flame induced-draft hole 111 is larger than that of the thick flame induced-draft hole 131. Wherein, the aperture of the thick flame induced-draft hole 131 is 2-3.5mm, preferably 2.5mm, and the aperture of the thin flame induced-draft hole 111 is 3.2-4.5mm, preferably 3.8mm. Different amounts of air can be respectively introduced into the air-guiding holes with different areas, so that different air-fuel ratios of the mixed fuel gas are realized, and the mixed fuel gas with two different concentrations is obtained. Specifically, the aperture of the thick flame air-guiding hole 131 is small, the amount of the introduced air is small, the concentration of the mixed gas is high, the mixed gas sequentially passes through the third injection pipe 230 and the middle ring mixing cavity 250 and is output and combusted in the thick flame hole 410 to generate thick flame with higher temperature after combustion, the aperture of the thin flame air-guiding hole 111 is large, the amount of the introduced air is large, the concentration of the mixed gas is low, and the mixed gas sequentially passes through the first injection pipe 210 and the outer ring mixing cavity 260 and is output and combusted in the thin flame hole 420 to generate thin flame with lower temperature after combustion. Because the thick firework holes 410 and the thin firework holes 420 are arranged at intervals, a combustion mode of alternately thick and thin main burners is realized, the combustion temperature is reduced, the gas combustion is more sufficient, and the generation of nitrogen oxides is inhibited.

Further, referring to fig. 1, in order to improve the difference between the air-fuel ratios of the middle ring mixing chamber 250 and the outer ring mixing chamber 260, the first ejector pipe 210 is further provided with an ejector pipe air hole 212. The ejector tube air holes 212 act in concert with the air holes in the nozzle, both for air intake. Air can be introduced again by forming the air hole 212 of the injection pipe on the first injection pipe 210, so that the concentration of fuel gas in the first injection pipe 210 is reduced, and the alternate burning mode of the main burner is ensured.

In addition, a damper 211 with adjustable opening is arranged on each injection pipe. Besides adjusting the air-fuel ratio of the mixed gas through the air guiding hole and the air guiding hole, the embodiment can further finely adjust the air-fuel ratio of the mixed gas through the adjusting air door plate 211, and further adjust the mixed gas by changing the opening of the air door plate 211, so that the combustion of the thick flame and the thin flame can be accurately controlled, and smooth progress of the thick flame and the thin flame can be ensured.

In this embodiment, the air guiding holes 111, 131 and the air guiding hole 212 of the injection pipe are all circular in shape, so that the processing is facilitated.

Referring to fig. 3, the intake valve 100 according to another embodiment of the present invention has a structure substantially identical to that of the intake valve according to the first embodiment of the present invention, except that, as shown in fig. 3, two sets of air guiding holes are provided in the first nozzle 110, and a set of secondary air guiding holes 112 is provided in addition to the light flame air guiding holes 111, and the secondary air guiding holes 112 are located between the light flame air guiding holes 111 and the nozzle outlets. Through the secondary air guiding holes 112, the number and the area of the air guiding holes can be increased, and more air can be introduced into the first nozzle 110 for multiple times, so that the mixed fuel gas with different concentration from the third nozzle 130 can be obtained.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. A burner air intake system for a stove, characterized by comprising:

A furnace head (200), wherein two or more ejector tubes are provided on the furnace head (200), ejector tube air holes (212) are provided on the ejector tubes, and an air damper plate (211) with an adjustable opening size is provided on the ejector tubes;

An air intake valve (100), wherein a plurality of nozzles are arranged on the air intake valve (100), the nozzles corresponding to the ejector tubes one by one, the nozzles respectively extending into the corresponding ejector tubes, the nozzles passing through the damper plate (211), and the distance that the nozzles penetrate into the ejector tube is 1 mm to 5 mm;

At least two of the nozzles are provided with air induction holes, the number of the air induction holes on the nozzle is multiple, the multiple air induction holes are distributed on the nozzle in multiple surfaces, and the distances between the multiple air induction holes and the outlet of the nozzle are equal.

The total areas of the air induction holes provided on different nozzles are different. The air induction holes include concentrated flame air induction holes (131) and light flame air induction holes (111). The concentrated flame air induction holes (131) and the light flame air induction holes (111) are respectively provided on different nozzles. The total area of the light flame air induction holes (111) is greater than the total area of the concentrated flame air induction holes (131).

2 . The burner air intake system for a stove according to claim 1 , wherein the plurality of air induction holes are divided into a plurality of groups, and the distances between the air induction holes in different groups and the outlet of the nozzle are different.

3. The burner air intake system for a stove according to claim 1, characterized in that one or more valve switches are provided on the air intake valve (100).

4 . The burner air intake system for a stove according to claim 3 , wherein the number of the valve switches is equal to the number of the nozzles, and each of the valve switches independently controls one of the nozzles.