Three-ring fire burner and gas stove

Abstract

The utility model relates to the technical field of combustors, and discloses a three-ring fire combustor and a gas stove with the three-ring fire combustor, the three-ring fire combustor comprises a furnace end and a gas distribution disc arranged on the furnace end, the gas distribution disc is provided with a center fire gas distribution cavity, a two-ring fire gas distribution cavity and an outer ring fire gas distribution cavity, a central fire cover, a second-ring fire cover and an outer fire cover are respectively mounted on the central fire gas distribution channel, the second-ring fire gas distribution cavity and the outer-ring fire gas distribution cavity; the furnace end is provided with two injection pipes and a central injection pipe, wherein the two injection pipes are used for guiding air to the two-ring fire gas distribution cavity and the outer-ring fire gas distribution cavity respectively, and the central injection pipe is used for guiding air to the central fire gas distribution cavity. A nozzle is installed on the central injection pipe. Wherein the nozzle and the central injection pipe are respectively provided with a first bypass hole for injecting primary air and a second bypass hole for injecting secondary air. When the three-ring fire burner is applied to a gas stove, the minimum fire heat load can be less than 200W, the stable burning of extremely small fire can be realized, and the three-ring fire burner has the advantages that the small fire is enough small, the burning flame length is uniform, the burning is stable, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a three-ring fire burner and a gas stove with the three-ring fire burner. Background Art

[0002] At present, the more traditional three-ring fire burner, as described in the Chinese utility model patent with publication number CN206556016U, generally adopts three ejector tubes arranged in parallel to eject air. The structure is relatively complex, the cost is high, and the heat load of the center fire is difficult to reduce. It is generally above 300W and cannot be reduced to a minimum fire below 200W.

[0003] In order to reduce costs, some companies have simplified the central ejector tube on the burner head of the three-ring fire burner. However, since only the central ejector tube on the burner head ejects air, it is impossible to achieve an extremely low fire, as described in Chinese patent applications with publication numbers CN107036099A and CN206469261U.

[0004] Some enterprises also add alloy mesh plates to the central fire cover to improve the stability and reliability of the burner when burning at a very low fire, as described in Chinese patent application publication number CN216408955U. This burner needs to add alloy mesh plates to the central fire cover, which undoubtedly makes the structure more complicated and increases the cost. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the present utility model is to provide a three-ring fire burner structure which can realize stable combustion of extremely small fire in a simpler and more convenient way, and at least provide a beneficial choice or create conditions for solving one or more technical problems in the prior art.

[0006] To achieve the above objectives, the utility model adopts the following technical solutions.

[0007] A three-ring fire burner comprises a burner head, and an air distribution plate installed on the burner head, wherein the air distribution plate has a central fire air distribution cavity, a second ring fire air distribution cavity and an outer ring fire air distribution cavity, and a central fire cover, a second ring fire cover and an outer fire cover are installed on the central fire air distribution channel, the second ring fire air distribution cavity and the outer ring fire air distribution cavity respectively; the burner head has two ejector tubes for respectively drawing air to the second ring fire air distribution cavity and the outer ring fire air distribution cavity and a central ejector tube for drawing air to the central fire air distribution cavity, and a nozzle is installed on the central ejector tube; wherein the nozzle and the central ejector tube respectively have a first side hole for drawing one layer of air and a second side hole for drawing two layers of air.

[0008] More preferably, the first bypass holes are evenly arranged around the side wall of the nozzle.

[0009] More preferably, the number of the first bypass holes is six, forming a circle around the side wall of the nozzle.

[0010] More preferably, the second bypass holes are evenly arranged around the side wall of the central ejector tube.

[0011] More preferably, the number of the second bypass holes is four, forming a circle around the side wall of the central ejector tube.

[0012] More preferably, both the first side hole and the second side hole are tapered holes that are wide outside and narrow inside.

[0013] More preferably, the central ejector tube is a round tube, has an external thread at the connecting end of the nozzle, and an internal thread matching the external thread is provided at the connecting end of the central ejector tube, and the nozzle and the central ejector tube are threadedly connected.

[0014] More preferably, the nozzle and the central ejector tube are connected by an interference fit plug-in or snap-fit ​​connection.

[0015] On the other hand, the utility model also provides a gas stove having a three-ring fire burner as described above.

[0016] The utility model has at least the following beneficial effects.

[0017] The utility model provides a three-ring fire burner, which uses a nozzle with a first side hole to inject air once, and cooperates with the second side hole of the central injection pipe on the burner head to perform double injection, thereby increasing the oxygen content required for combustion, making the combustion more complete, and improving the stability and reliability of the burner when burning at a very low fire. At the same time, it is beneficial to shorten and reduce the central injection pipe, which is convenient for structural optimization and cost reduction.

[0018] When the three-ring fire burner is applied to a gas stove, the minimum heat load can be stably burned at a very low flame below 200W, and it has the advantages of a small enough flame, uniform combustion flame length, and stable combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a schematic structural diagram of a three-ring fire burner provided by the utility model.

[0020] Figure 2 Shown is a schematic diagram of the structural decomposition of the three-ring fire burner provided by the utility model.

[0021] Figure 3 Shown is a top view of the three-ring fire burner provided by the utility model.

[0022] Figure 4 Shown Figure 3 Middle AA section view.

[0023] Figure 5 Shown Figure 1 The enlarged view at point I in the figure shows that the arrow line represents the direction of airflow.

[0024] Description of Figure Numbers.

[0025] 1: Nozzle, 2: Burner head, 3: Gas distribution plate, 4: Outer fire cover, 5: Two-ring fire cover, 6: Center fire cover.

[0026] 11 / 21: side hole, 22: center channel, 23: center ejector tube, 24: ejector tube.

[0027] 31: Central fire dividing cavity, 32: Second ring fire dividing cavity, 33: Outer ring fire dividing cavity. DETAILED DESCRIPTION

[0028] The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, and cannot be understood as limiting the utility model.

[0029] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention.

[0030] Example 1

[0031] Reference Figure 1 As shown, a three-ring fire burner includes a burner head 2, an air distribution plate 3 installed on the burner head 2, the air distribution plate 3 has a central fire air distribution cavity 31, a second ring fire air distribution cavity 32 and an outer ring fire air distribution cavity 33, and a central fire cover 6, a second ring fire cover 5 and an outer fire cover 4 are respectively installed on the central fire air distribution channel 31, the second ring fire air distribution cavity 32 and the outer ring fire air distribution cavity 33; the burner head 2 has two ejector pipes 24 for respectively guiding air to the second ring fire air distribution cavity 32 and the outer ring fire air distribution cavity 33 and a central ejector pipe 23 for guiding air to the central fire air distribution cavity 31, a nozzle 1 is installed on the central ejector pipe 23, and the nozzle 1 and the central ejector pipe 23 have side holes 11 and side holes 21 respectively.

[0032] When gas with a certain speed is ejected from the nozzle 1, the air is induced by the gas into the central ejection tube 23 of the burner 2 from the side hole 11 of the nozzle 1. This is a single-injection air. The gas and air mixture that has just entered the central ejection tube 23 of the burner does not reach the mixing ratio required for stable combustion. At this time, a single-premixed gas-air mixture is subjected to a double-injection air through the side hole 21 of the central ejection tube 23 of the burner. The gas-air mixture that has undergone the double-injection enters the central fire gas distribution cavity 31 of the gas distribution plate 3 from the central channel 22 of the burner 2, and finally flows out from the central fire cover 6 for combustion.

[0033] Compared with the prior art, the three-ring fire burner provided in this embodiment uses a nozzle 1 with a side hole 11 to inject air once, and cooperates with the side hole 22 of the central injection pipe 23 on the burner head to perform double injection, thereby increasing the oxygen content required for combustion, making the combustion more complete, and improving the stability and reliability of the burner when burning at a very low fire. At the same time, it is beneficial to shorten and reduce the central injection pipe 23, which is convenient for structural optimization and cost reduction.

[0034] In this embodiment, the side holes 11 are preferably evenly arranged around the side wall of the nozzle 1. Preferably, the number of the side holes 11 is six, forming a circle around the side wall of the nozzle 1. Obviously, the number and aperture size of the side holes 11 are not subject to routine adjustment by those skilled in the art according to actual needs, and are not limited to this embodiment.

[0035] In this embodiment, the bypass holes 22 are preferably evenly arranged around the side wall of the central ejector tube 23. Preferably, the number of the bypass holes 22 is four, forming a circle around the side wall of the central ejector tube 23. Obviously, the number and aperture size of the bypass holes 22 are not subject to routine adjustment by those skilled in the art according to actual needs, and are not limited to this embodiment.

[0036] In this embodiment, the side holes 11 and 22 are preferably tapered holes with a wide outside and a narrow inside to ensure the ejection effect. Obviously, the shapes of the side holes 11 and 22 can be appropriately adjusted according to different actual needs to better eject air.

[0037] In this embodiment, the center ejector tube 23 is preferably a round tube, the connecting end of the nozzle 1 preferably has an external thread, and the connecting end of the center ejector tube 23 is preferably provided with an internal thread that matches the external thread. The nozzle 1 and the center ejector tube 23 are threadedly connected, and the connection is reliable.

[0038] In some embodiments, the central ejection tube 23 may be a square tube or an elliptical tube, and the nozzle 1 and the central ejection tube 23 may be plug-in or snap-fitted with an interference fit, which is not limited to this embodiment.

[0039] Example 2

[0040] A gas stove having the three-ring fire burner as described in Example 1. Obviously, the gas stove provided in this embodiment has all the technical effects of Example 1, which will not be described in detail here.

[0041] It should also be noted that, in the description of the present invention, directional words such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions 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 cannot be understood as limiting the specific scope of protection of the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, "at least" means one or more, unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise specified and limited, the terms "assembly", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the utility model, unless otherwise specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "below" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the height of the second feature. A first feature being "above", "below" and "below" a second feature includes that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the second feature.

[0045] Through the description of the above structure and principle, those skilled in the art should understand that the present invention is not limited to the above specific implementations. Improvements and substitutions based on the present invention using the known technology in the art fall within the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims and their equivalents. Parts not described in the specific implementations are prior art or common knowledge.

Claims

1. A three-ring fire burner, comprising a burner head, an air distribution plate installed on the burner head, the air distribution plate having a central fire air distribution cavity, a second ring fire air distribution cavity and an outer ring fire air distribution cavity, a central fire cover, a second ring fire cover and an outer fire cover are respectively installed on the central fire air distribution cavity, the second ring fire air distribution cavity and the outer ring fire air distribution cavity; the burner head has two ejector pipes for respectively drawing air for the second ring fire air distribution cavity and the outer ring fire air distribution cavity and a central ejector pipe for drawing air for the central fire air distribution cavity, a nozzle is installed on the central ejector pipe; it is characterized in that, The nozzle and the central ejector tube respectively have a first side hole for ejecting single air and a second side hole for ejecting double air.

2. A triple-ring fire burner according to claim 1, characterized in that: The first bypass holes are evenly arranged around the side wall of the nozzle.

3. A triple-ring fire burner according to claim 1 or 2, characterized in that: The number of the first bypass holes is six, which are arranged in a circle around the side wall of the nozzle.

4. A triple-ring fire burner according to claim 1, characterized in that: The second bypass holes are evenly arranged around the side wall of the central ejector tube.

5. A triple-ring fire burner according to claim 1 or 4, characterized in that: The number of the second bypass holes is four, which form a circle around the side wall of the central ejector tube.

6. A triple-ring fire burner according to claim 1, characterized in that: The first side hole and the second side hole are both tapered holes that are wide outside and narrow inside.

7. A triple-ring fire burner according to claim 1, characterized in that: The central ejection tube is a round tube, and has an external thread at the connection end of the nozzle. An internal thread matching the external thread is provided at the connection end of the central ejection tube, and the nozzle and the central ejection tube are threadedly connected.

8. A triple-ring fire burner according to claim 1 or 7, characterized in that: The nozzle and the central ejection tube are connected by interference fit or snap fit.

9. A gas stove, characterized in that: A triple-ring fire burner as claimed in any one of claims 1 to 8.

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