Burner air intake systems for cooktops

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

Technical Field

[0001] The invention relates to the field of gas, and in particular to a burner air intake system for a stove. Background Art

[0002] The burners of existing gas stoves have the same gas concentration coming out of the fire holes of the same fire cover, with large and concentrated firepower and high combustion temperature, which easily leads to incomplete combustion and produces more carbon monoxide and nitrogen oxides and other gases that are very harmful to the human body during the combustion process. With the advent of the world energy crisis and the improvement of people's environmental awareness, there are higher and higher requirements for the efficiency and emissions of gas stoves. In order to meet the requirements of low nitrogen oxide emissions, it is necessary to further improve the burners of existing gas stoves.

[0003] On this basis, the applicant proposed to set two intervally distributed fire holes on the fire cover, and the two fire holes are respectively filled with mixed gas of different concentrations, so as to achieve the purpose of rich and thin combustion in the form of alternating rich and thin, reduce the combustion temperature, make the gas burn more fully, and thus inhibit the generation of nitrogen oxides. Therefore, without adding gas storage equipment, it is necessary to improve the air intake system of the existing burner to obtain mixed gas of different concentrations. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a burner air intake system for a stove, which introduces different amounts of air through air induction holes during operation to obtain mixed gas with different concentrations.

[0005] According to the first aspect of the present invention, a burner air intake system for a stove includes: a burner head, on which two or more ejector pipes are arranged; an air intake valve, on which a plurality of nozzles are arranged, the nozzles correspond to the ejector pipes one by one, and the nozzles extend into the corresponding ejector pipes respectively; wherein at least two of the nozzles are provided with air induction holes, and the total areas of the air induction holes provided on different nozzles are different.

[0006] The burner air intake system for a stove according to the embodiment of the present invention has at least the following beneficial effects: in the burner air intake system for a stove of the present solution, the total areas of the air induction holes opened on different nozzles are different, thereby introducing different amounts of air, thereby achieving different air-fuel ratios of the mixed gas, and obtaining mixed gases of multiple different concentrations.

[0007] The burner air intake system for the stove of the present invention can be used to realize the combustion mode of the main burner with alternating thick and thin gases, reduce the combustion temperature, make the gas burn more completely, and thus suppress the generation of nitrogen oxides.

[0008] According to the burner air intake system for a stove described in the first aspect of the present invention, the air induction holes include a thick flame air induction hole and a thin flame air induction hole, the thick flame air induction hole and the thin flame air induction hole are respectively arranged on different nozzles, and the total area of ​​the thin flame air induction hole is larger than the total area of ​​the thick flame air induction hole. The total area of ​​the thick flame air induction hole is smaller, the amount of air introduced is less, the concentration of the mixed gas is high, and a thick flame with a higher temperature is generated after combustion; the total area of ​​the thin flame air induction hole is larger, the amount of air introduced is more, the concentration of the mixed gas is low, and a thin flame with a lower temperature is generated after combustion.

[0009] According to the burner air intake system for a stove described in the first aspect of the present invention, there are multiple air induction holes on the nozzle, and the multiple air induction holes are distributed on the nozzle in a multi-sided manner, so that air enters the nozzle from multiple directions and is evenly mixed with the gas.

[0010] According to the burner air intake system for a stove described in the first aspect of the present invention, the distances between the plurality of air induction holes and the outlet of the nozzle are equal.

[0011] According to the burner air intake system for a stove described in the first aspect of the present invention, 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. Through the plurality of groups of air induction holes with different distances, different amounts of air can be introduced multiple times to obtain mixed gases of different concentrations.

[0012] According to the burner air intake system for a stove described in the first aspect of the present invention, an ejector pipe is provided with an ejector pipe air hole. The ejector pipe air hole has the same function as the air induction hole, which is used to introduce air. By providing ejector pipe air holes on part of the ejector pipe, the gas concentration in the ejector pipe can be changed to obtain a variety of mixed gases with different concentrations.

[0013] Furthermore, the air induction holes and the ejection pipe air holes are in any one of a circular, elliptical, and polygonal shape for easy processing, wherein the polygonal shape includes a triangle, a rhombus, a rectangle, a square, a hexagon, and the like.

[0014] According to the burner air intake system for a stove described in the first aspect of the present invention, the ejector pipe is provided with an air damper plate with an adjustable opening size. This design can further fine-tune the air-fuel ratio of the mixed gas by adjusting the air damper plate, and further adjust the mixed gas by changing the opening size of the air damper plate, so as to more accurately control the rich and thin flame combustion and ensure the smooth progress of the rich and thin combustion.

[0015] According to the burner air intake system for a stove described in the first aspect of the present invention, the nozzle passes through the damper plate, and the distance that the nozzle penetrates into the ejector tube is 1mm-5mm, preferably 3mm. This distance ensures that the gas input by the nozzle enters the ejector tube smoothly.

[0016] According to the burner air intake system for a stove described in the first aspect of the present invention, the air intake valve is provided with one or more valve switches. The number of valve switches can be adjusted according to actual conditions, and one valve switch can control one nozzle alone or multiple nozzles at the same time.

[0017] According to the burner air intake system for a stove described in the first aspect of the present invention, the number of the valve switches is equal to the number of the nozzles, and each valve switch independently controls one nozzle, thereby improving the accuracy of control.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of a burner air intake system for a stove according to the present invention;

[0021] Figure 2 yes Figure 1 A cross-sectional view of a burner air intake system for a cooker;

[0022] Figure 3 It is a schematic structural diagram of another intake valve of the present invention.

[0023] Description of Figure Numbers:

[0024] Inlet valve 100, first nozzle 110, light flame air induction hole 111, secondary air induction hole 112, second nozzle 120, third nozzle 130, rich flame air induction hole 131, first valve switch 140, second valve switch 150;

[0025] The furnace head 200, the first ejector tube 210, the air door plate 211, the ejector tube air hole 212, the second ejector tube 220, the third ejector tube 230, the inner ring mixing chamber 240, the middle ring mixing chamber 250, and the outer ring mixing chamber 260;

[0026] Inner ring fire cover 300;

[0027] Outer ring fire cover 400 , strong flame holes 410 , weak flame holes 420 . DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, "several" means one or more, and "more" means more than two. If there is a description of the first, second, and third, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] Reference Figure 1 The burner air intake system for a stove provided by the present invention comprises a burner head 200 and an air intake valve 100. The burner head 200 is provided with three ejection pipes, namely, a first ejection pipe 210, a second ejection pipe 220 and a third ejection pipe 230; Figure 1 As shown, the air intake valve 100 is provided with a first nozzle 110, a second nozzle 120 and a third nozzle 130 corresponding to the three ejector tubes, and the nozzles are respectively extended into the corresponding ejector tubes. Among them, the first nozzle 110 and the third nozzle 130 are respectively provided with air induction holes, and the total area of ​​the air induction holes provided on the first nozzle 110 and the third nozzle 130 is different. The first nozzle 110 and the third nozzle 130 can respectively introduce different amounts of air through the air induction holes with different total areas, so as to achieve different air-fuel ratios of the mixed gas in the first ejector tube 210 and the third ejector tube 230, and obtain two mixed gases of different concentrations. The burner air intake system for the stove of this scheme can be used to realize the alternating thick and thin combustion mode of the main burner, reduce the combustion temperature, make the gas burn more fully, and thus suppress the generation of nitrogen oxides.

[0033] Specifically, the air induction holes include rich flame air induction holes 131 and light flame air induction holes 111. In this embodiment, the air induction holes on the first nozzle 110 are light flame air induction holes 111, and the air induction holes on the third nozzle 130 are rich flame air induction holes 131. The light flame air induction holes 111 can be increased in number or have a larger aperture so that the total area of ​​the light flame air induction holes 111 is greater than the total area of ​​the rich flame air induction holes 131. For example, in this embodiment, the aperture of the light flame air induction holes 111 is greater than the aperture of the rich flame air induction holes 131. The aperture of the rich flame air induction holes 131 is 2-3.5 mm, preferably 2.5 mm, and the aperture of the light flame air induction holes 111 is 3.2-4.5 mm, preferably 3.8 mm. The aperture of the rich flame air induction hole 131 is small, the amount of air introduced is small, the concentration of the mixed gas is high, and a high-temperature rich flame is generated after combustion; the aperture of the light flame air induction hole 111 is large, the amount of air introduced is large, the concentration of the mixed gas is low, and a low-temperature light flame is generated after combustion.

[0034] Furthermore, the first nozzle 110 and the third nozzle 130 are respectively provided with a plurality of air induction holes, which are distributed on the nozzles in a six-sided manner, so that air enters the nozzles from multiple directions and is evenly mixed with the gas. The air induction holes of this solution are not limited to being distributed on the nozzles in a six-sided manner, but may also be distributed on the nozzles in a four-sided manner, a five-sided manner, a eight-sided manner, or other manners.

[0035] Further, such as Figure 1 As shown, the distances between the multiple concentrated flame air induction holes 131 and the outlet of the third nozzle 130 are all equal, and the multiple concentrated flame air induction holes 131 are distributed on the third nozzle 130 in a concentric ring shape.

[0036] like Figure 3 As shown, the first nozzle 110 is provided with two groups of air induction holes, one of which is the light flame air induction holes 111, and the other is the secondary air induction holes 112, and the secondary air induction holes 112 are located between the light flame air induction holes 111 and the burner 200. By using multiple groups of air induction holes at different distances, the number of air induction holes can be increased, and at the same time, different amounts of air can be introduced multiple times to obtain mixed gas of different concentrations. For example, in the present embodiment, the first nozzle 110 can introduce more air multiple times through the two groups of air induction holes, the light flame air induction holes 111 and the secondary air induction holes 112, so as to obtain a mixed gas of different concentration from the third nozzle 130. In the present embodiment, only two groups of air induction holes are provided on the first nozzle 110. It is easy to imagine that in other embodiments, more groups of air induction holes can be provided on the first nozzle 110, or multiple groups of air induction holes can be provided on other nozzles.

[0037] like Figure 1As shown, in this embodiment, the first ejector tube 210 is provided with an ejector tube air hole 212. The function of the ejector tube air hole 212 is the same as that of the ejector tube air hole on the nozzle, both of which are used to introduce air. By providing the ejector tube air hole 212 on some ejector tubes, the gas concentration in the ejector tube can be changed to obtain a variety of mixed gases with different concentrations. It is easy to imagine that in other embodiments, ejector tube air holes can also be provided on other ejector tubes.

[0038] Specifically, the air holes and the ejection pipe air holes are in any shape of a circle, an ellipse, or a polygon, wherein the polygon may be a triangle, a rhombus, a rectangle, a square, a hexagon, etc. The air holes and the ejection pipe air holes are preferably in a circle for easy processing.

[0039] Furthermore, the ejector pipe is also provided with an air damper plate 211 with an adjustable opening. In addition to adjusting the air-fuel ratio of the mixed gas through the air duct holes and the ejector pipe air holes, the present design can further fine-tune the air-fuel ratio of the mixed gas by adjusting the air damper plate 211. By changing the opening size of the air damper plate 211, the mixed gas can be further adjusted, and the rich and thin flame combustion can be more accurately controlled to ensure the smooth progress of the rich and thin combustion.

[0040] like Figure 2 As shown, the nozzle passes through the damper plate, and the distance that the nozzle penetrates into the ejector pipe is 1mm-5mm, preferably 3mm. This distance ensures that the gas input by the nozzle can smoothly enter the ejector pipe.

[0041] Furthermore, the air intake valve 100 is also provided with one or more valve switches 140, 150. The number of the valve switches 140, 150 can be adjusted according to actual conditions. In the present embodiment, the air intake valve 100 is provided with a first valve switch 140 and a second valve switch 150, wherein the first valve switch 140 controls the second nozzle 120 alone, and the second valve switch 150 controls the first nozzle 110 and the third nozzle 130 simultaneously.

[0042] It is easy to imagine that in other embodiments, the number of valve switches can also be equal to the number of nozzles, and each valve switch independently controls a nozzle to improve the accuracy of control.

[0043] The burner embodiment provided in this embodiment includes a main burner and an auxiliary burner. It is easy to imagine that in other embodiments, when there is only one burner, only two ejector pipes and corresponding two nozzles may be arranged.

[0044] Reference below Figures 1 to 3 The burner air intake system for a stove according to an embodiment of the present invention is described in detail with specific embodiments. It is worth noting that the following description is only an exemplary description and is not a specific limitation of the invention.

[0045] Reference Figure 1 , Figure 2 The present invention provides an application embodiment of a burner air intake system for a stove, a stove, comprising the above-mentioned burner air intake system for the stove, an inner ring fire cover 300 and an outer ring fire cover 400.

[0046] The burner head 200 is provided with three ejector tubes, namely, a first ejector tube 210, a second ejector tube 220 and a third ejector tube 230. The burner head 200 is also provided with an inner ring mixing chamber 240, a middle ring mixing chamber 250 and an outer ring mixing chamber 260 which are independent of each other, wherein the first ejector tube 210 is connected to the outer ring mixing chamber 260, the second ejector tube 220 is connected to the inner ring mixing chamber 240, and the third ejector tube 230 is connected to the middle ring mixing chamber 250. The inner ring mixing chamber 240 is covered with an inner ring fire cover 300, and the middle ring mixing chamber 250 and the outer ring mixing chamber 260 are covered with an outer ring fire cover 400. The outer ring fire cover 400 is provided with thick flame holes 410 and thin flame holes 420 at intervals, wherein the thick flame holes 410 are connected to the middle ring mixing chamber 250, and the thin flame holes 420 are connected to the outer ring mixing chamber 260, as shown in FIG. Figure 2 shown.

[0047] The middle ring mixing chamber 250, the outer ring mixing chamber 260 and the outer ring fire cover 400 form a main burner, and the inner ring mixing chamber 240 and the inner ring fire cover 300 form an auxiliary burner.

[0048] The intake valve 100 is provided with a first nozzle 110, a second nozzle 120 and a third nozzle 130. The first nozzle 110 extends into the first ejector tube 210, the second nozzle 120 extends into the second ejector tube 220, and the third nozzle 130 extends into the third ejector tube 230. The nozzles and ejector tubes are connected one by one. The intake valve 100 is also provided with a first valve switch 140 and a second valve switch 150. The first valve switch 140 controls the second nozzle 120 alone to supply gas to the inner ring mixing chamber 240; the second valve switch 150 controls the first nozzle 110 and the third nozzle 130 at the same time to supply gas to the middle ring mixing chamber 250 and the outer ring mixing chamber 260 at the same time.

[0049] The first nozzle 110 and the third nozzle 130 are respectively provided with a plurality of air induction holes, which are distributed on the first nozzle 110 and the third nozzle 130 in a six-sided manner, so that air enters the nozzle from multiple directions and is evenly mixed with the gas to obtain a mixed gas. The air induction holes on the first nozzle 110 are light flame air induction holes 111, and the air induction holes on the third nozzle 130 are strong flame air induction holes 131. The aperture of the light flame air induction holes 111 is larger than the aperture of the strong flame air induction holes 131, so that the total area of ​​the light flame air induction holes 111 is larger than the total area of ​​the strong flame air induction holes 131. Among them, the aperture of the strong flame air induction holes 131 is 2-3.5 mm, preferably 2.5 mm, and the aperture of the light flame air induction holes 111 is 3.2-4.5 mm, preferably 3.8 mm. Air induction holes of different areas can respectively introduce different amounts of air, so as to achieve different air-fuel ratios of the mixed gas and obtain two mixed gases of different concentrations. Specifically, the diameter of the dense flame air induction hole 131 is small, the amount of air introduced is small, and the concentration of the mixed gas is high. The mixed gas passes through the third ejector pipe 230 and the middle ring mixing chamber 250 in sequence, and then is output to the dense flame hole 410 for combustion, and after combustion, a high-temperature dense flame is generated; the diameter of the light flame air induction hole 111 is large, the amount of air introduced is large, and the concentration of the mixed gas is low. The mixed gas passes through the first ejector pipe 210 and the outer ring mixing chamber 260 in sequence, and then is output to the light flame hole 420 for combustion, and after combustion, a low-temperature light flame is generated. Since the dense flame hole 410 and the light flame hole 420 are arranged at intervals, a dense and light combustion mode of the main burner is realized, the combustion temperature is reduced, and the gas is burned more fully, thereby suppressing the generation of nitrogen oxides.

[0050] Further, refer to Figure 1 In order to improve the difference in air-fuel ratio between the middle ring mixing chamber 250 and the outer ring mixing chamber 260, the present embodiment further provides an ejector pipe air hole 212 on the first ejector pipe 210. The ejector pipe air hole 212 has the same function as the air hole on the nozzle, both of which are used to introduce air. By providing the ejector pipe air hole 212 on the first ejector pipe 210, air can be introduced again to reduce the gas concentration in the first ejector pipe 210, thereby ensuring the realization of the thick and thin combustion mode of the main burner.

[0051] In addition, each ejector tube is also provided with an air damper plate 211 with an adjustable opening. In addition to adjusting the air-fuel ratio of the mixed gas through the air duct holes and the ejector tube air holes, the present embodiment can further fine-tune the air-fuel ratio of the mixed gas by adjusting the air damper plate 211. By changing the opening size of the air damper plate 211, the mixed gas can be further adjusted, and the rich and thin flame combustion can be more accurately controlled to ensure smooth rich and thin combustion.

[0052] In this embodiment, the air induction holes 111, 131 and the ejection pipe air hole 212 are all circular in shape for ease of processing.

[0053] Reference Figure 3 The structure of the intake valve 100 of another embodiment of the present invention is basically the same as that of the intake valve of the first embodiment of the present invention, except that: Figure 3 As shown, in this embodiment, two groups of air induction holes are provided on the first nozzle 110. In addition to the light flame air induction holes 111, a group of secondary air induction holes 112 are also provided. The secondary air induction holes 112 are located between the light flame air induction holes 111 and the nozzle outlet. The secondary air induction holes 112 can increase the number and area of ​​the air induction holes, and enable the first nozzle 110 to introduce more air multiple times, thereby obtaining a mixed gas with a different concentration from that of the third nozzle 130.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A burner air intake system for a stove, characterized in that: include: 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 nozzle outlet 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, characterized in that: 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: The air intake valve (100) is provided with one or more valve switches.

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

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