Combustor

Abstract

The utility model provides a combustor. The combustor comprises a first cover body and a second cover body, and the first cover body is provided with a first through hole; the second cover body is provided with a second through hole; the first cover body and the second cover body are covered to form a flow guide cavity; wherein the first through hole and the second through hole are correspondingly arranged, and the end, provided with the first through hole, of the first cover body and the end, provided with the second through hole, of the second cover body are arranged at a first distance to form an annular fire hole; the first distance is larger than 0 mm and smaller than or equal to 4 mm. The heating uniformity of the combustor can be improved.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a burner. Background Technology

[0002] Burners are widely used in industries such as gas ovens. A burner typically injects pressurized gas or other fuel into the burner via an inlet in a jet manner. The gas flows through the burner's guide chamber and then reaches the burner's flame holes for combustion. In existing technology, burners are usually designed with multiple gas outlets forming multiple spaced flame holes, which can easily lead to uneven heating. Utility Model Content

[0003] This application provides a burner that can improve the heating uniformity of the burner.

[0004] To solve the above-mentioned technical problems, this application provides a burner, which includes a first cover and a second cover. The first cover has a first through hole, and the second cover has a second through hole. The first cover and the second cover are closed to form a flow guiding cavity. The first through hole and the second through hole are correspondingly arranged, and the end of the first cover with the first through hole and the end of the second cover with the second through hole are spaced apart by a first distance to form an annular flame hole. The first distance is greater than 0 mm and less than or equal to 4 mm.

[0005] The beneficial effects of this application are as follows: The burner of this application includes a first cover and a second cover. The first cover has a first through hole, and the second cover has a second through hole. The first cover and the second cover are closed to form a flow guiding cavity. The first through hole and the second through hole are correspondingly arranged, and the end of the first cover with the first through hole and the end of the second cover with the second through hole are spaced apart by a first distance to form an annular flame hole. The first distance is greater than 0 mm and less than or equal to 4 mm. In this way, the first cover and the second cover are closed to form a flow guiding cavity, and the first distance between the end of the first cover with the first through hole and the end of the second cover with the second through hole enables the formation of an annular flame hole. The annular flame hole allows the burner to form an annular flame, improving the heating uniformity of the burner and facilitating a higher ignition success rate. Furthermore, setting the first distance to be greater than 0 mm and less than or equal to 4 mm ensures sufficient flame hole area and gas output from the annular flame hole during combustion, improving gas output stability and flame combustion stability. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0007] Figure 1 This is a schematic diagram of the structure of an embodiment of the burner of this application;

[0008] Figure 2 yes Figure 1 Exploded structural diagram of the embodiment;

[0009] Figure 3 yes Figure 1 A cross-sectional structural diagram of the embodiment;

[0010] Figure 4 yes Figure 3 An enlarged structural diagram of region A in the embodiment;

[0011] Figure 5 This is a schematic diagram of another embodiment of the burner in this application;

[0012] Figure 6 yes Figure 5 A schematic diagram of the exploded structure of the embodiment. Detailed Implementation

[0013] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0014] The terms “first,” “second,” etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that, when used in this specification and the appended claims, the term “comprising” indicates the presence of the described feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be further understood that the term “and / or,” as used in this specification and the appended claims, refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0015] As used in this specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [the described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [the described condition or event] is detected," or "in response to detection of [the described condition or event]."

[0016] It should be noted that when one element is fixed to another element, this includes fixing the element directly to the other element or fixing the element to the other element through at least one other intermediate element. When one element is connected to another element, this includes connecting the element directly to the other element or connecting the element to the other element through at least one other intermediate element.

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] Burners are widely used in industries such as gas ovens. A burner typically injects pressurized gas or other fuel into the burner via an inlet in a jet manner. The gas flows through the burner's guide chamber and then reaches the burner's flame holes for combustion. In existing technology, burners are usually designed with multiple gas outlets forming multiple spaced flame holes, which can easily lead to uneven heating.

[0019] The fuel used in the burner is usually gas, but it can also be a liquid fuel with fluidity. The following embodiments of this application will be described using a burner that uses gas as fuel as an example.

[0020] This application first proposes a burner, such as Figures 1 to 6 As shown, Figure 1 This is a schematic diagram of the structure of one embodiment of the burner of this application. Figure 2 yes Figure 1 Exploded structural diagram of the embodiment, Figure 3 yes Figure 1 A cross-sectional structural diagram of the embodiment. Figure 4 yes Figure 3 An enlarged structural diagram of region A in the embodiment. Figure 5 This is a schematic diagram of another embodiment of the burner in this application. Figure 6 yes Figure 5 Schematic diagram of the exploded structure of the embodiment. (See attached image) Figure 1 , Figure 2 , Figure 5 , Figure 6 The burner includes a first cover 10 and a second cover 20. The first cover 10 has a first through hole 101; the second cover 20 has a second through hole 102; the first cover 10 and the second cover 20 are closed to form a flow guiding cavity 103; wherein, see reference Figure 2 , Figure 3 , Figure 4 The first through hole 101 and the second through hole 102 are respectively provided. The first cover 10 with the first through hole 101 and the second cover 20 with the second through hole 102 are separated by a first distance h to form an annular fire hole 104. The first distance h is greater than 0 mm and less than or equal to 4 mm.

[0021] In operation, the gas in the guide cavity 103 flows to the annular flame hole 104 and is ignited at the annular flame hole 104.

[0022] It should be noted that an annular flame hole 104 is formed between the end of the first cover 10 with the first through hole 101 and the end of the second cover 20 with the second through hole 102, with a first distance h between them. Therefore, the width of the annular flame hole 104 is the first distance h. The first distance h can be 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, or 4mm, etc.

[0023] In this way, the first cover 10 and the second cover 20 are closed to form a flow guiding cavity 103. The first cover 10 with the first through hole 101 and the second cover 20 with the second through hole 102 are separated by a first distance h, which can form an annular flame hole 104. The annular flame hole 104 enables the burner to form an annular flame, improves the heating uniformity of the burner, and facilitates the improvement of ignition success rate. Furthermore, setting the first distance h to be greater than 0 mm and less than or equal to 4 mm can ensure sufficient flame hole area and gas output of the annular flame hole 104 during combustion, improve gas output stability, and improve flame combustion stability.

[0024] In some embodiments, the first distance h is greater than or equal to 1.5 mm and less than or equal to 2.5 mm.

[0025] For example, the first distance h can be 1.5mm, 2mm, 2.25mm, 2.3mm, 2.4mm or 2.5mm, etc.

[0026] In one application scenario, the diameter of the ring formed by the annular flame holes 104 is 80mm. The width of the annular flame holes 104 is set to be greater than or equal to 1.5mm and less than or equal to 2.5mm, which can ensure sufficient flame hole area and gas output of the annular flame holes 104 during combustion, improve gas output stability, and improve flame combustion stability.

[0027] In some embodiments, see Figure 3 , Figure 4 The angle between the orientation b of the annular fire hole 104 and the central axis a of the annular fire hole 104 is 30° to 60°.

[0028] In one application scenario, the stacking direction of the first cover 10 and the second cover 20 is the first direction y. The annular fire hole 104 is formed into a ring shape. The central axis a of the ring shape is parallel to the first direction y. The angle B between the orientation b of the annular fire hole 104 and the direction where the central axis a is located can be 30°, 33°, 35°, 39°, 40°, 45°, 48°, 50°, 52°, 55°, 56° or 60°, etc., and is not specifically limited.

[0029] In the working state, the first direction y is the vertical direction. The first cover 10 and the second cover 20 are stacked in the vertical direction. The central axis a of the annular flame hole 104 is parallel to the vertical direction. The angle B between the orientation b of the annular flame hole 104 and the direction of the central axis a is 30° to 60°. This ensures that the flame emitted from the annular flame hole 104 is directed towards the bottom of the pot or other heated equipment. Since the smaller the angle B, the closer the flame is to the pot, the less likely the combustion products will meet national standards. The larger the angle B, the further the flame is from the pot, resulting in a poorer heating effect. Therefore, an angle B of 30° to 60° is preferred to achieve a better heating effect and ensure that the combustion products meet national standards.

[0030] In some embodiments, setting the angle B between the orientation b of the annular fire hole 104 and the direction of the central axis a to 50° can achieve a better heating effect.

[0031] In some embodiments, see Figure 4 The burner also includes a boss 30, which is disposed between the first cover 10 and the second cover 20 to define the size of the annular flame hole 104 as a first distance h.

[0032] By adjusting the protrusion height of the boss 30, the first distance h can be adjusted. Therefore, the boss 30 enables precise control of the dimensions of the annular fire hole 104, which facilitates assembly and improves the dimensional control accuracy of the annular fire hole 104.

[0033] In some embodiments, see Figure 4 The first cover 10 has at least one protrusion 30 on the side facing the second cover 20.

[0034] For example, in one application scenario, the first cover 10 can be stamped in the direction of the second cover 20 to form the above-mentioned boss 30. When the first cover 10 and the second cover 20 are closed, the boss 30 abuts against the second cover 20. In other application scenarios, the above-mentioned boss 30 can also be cast on the first cover 10, and there is no specific limitation.

[0035] This method reduces the number of burner components and simplifies the complexity of production and assembly.

[0036] In some embodiments, the first cover 10 has at least one protrusion 30 on the side facing the second cover 20, and the protrusion 30 is welded and fixed to the second cover 20.

[0037] In this way, the stability of the relative position of the first cover 10 and the second cover 20 can be improved, and the dimensional accuracy of the annular fire hole 104 can be improved.

[0038] In other embodiments (not shown), the second cover has at least one protrusion on the side facing the first cover. This reduces the number of burner components and simplifies production and assembly complexity.

[0039] For example, in one application scenario, the second cover can be stamped in the direction of the first cover to form the above-mentioned boss. When the second cover and the first cover are closed, the boss abuts against the first cover. In other application scenarios, the above-mentioned boss can also be cast on the second cover, and there is no specific limitation.

[0040] In some embodiments, at least one protrusion is formed on the side of the second cover facing the first cover, and the protrusion is welded to the first cover. This improves the stability of the relative positions of the first and second covers and enhances the dimensional accuracy of the annular fire hole.

[0041] In one application scenario, refer to Figure 2 or Figure 6 The first cover 10 includes a first body portion 11 and a first drainage portion 12, the first drainage portion 12 being provided with a first through hole 101; the second cover 20 includes a second body portion 21 and a second drainage portion 22, the second drainage portion 22 being provided with a second through hole 102; wherein, see reference Figure 4 The boss 30 is abutted between the first drainage part 12 and the second drainage part 22, so that the first drainage part 12 and the second drainage part 22 form an annular drainage channel 105 that communicates with the drainage cavity 103 and the annular fire hole 104. The first body part 11 and the second body part 21 form a drainage cavity 103 surrounding the annular drainage channel 105.

[0042] For example, at least one protrusion 30 may be formed on the side of the first drainage section 12 facing the second drainage section 22, or at least one protrusion 30 may be formed on the side of the second drainage section 22 facing the first drainage section 12, so that the protrusion 30 is abutted between the first drainage section 12 and the second drainage section 22, so that the first drainage section 12 and the second drainage section 22 form an annular drainage channel 105 that communicates with the guide cavity 103 and the annular fire hole 104.

[0043] In some embodiments, see Figure 1 or Figure 6 The burner includes multiple bosses 30, which are evenly distributed around the annular flame hole 104 in the circumferential x direction. By setting multiple bosses 30 evenly distributed around the annular flame hole 104 in the circumferential x direction, the dimensional accuracy of the entire annular flame hole can be improved, and the assembly convenience can be enhanced.

[0044] In other embodiments, at least one protrusion is formed on the side of the first cover facing the second cover, and at least one protrusion is formed on the side of the second cover facing the first cover. By providing protrusions on both the first and second covers in this way, the structural stability of the burner can be further improved, and the dimensional control accuracy of the annular flame holes can be increased.

[0045] In other embodiments, the height, shape, and number of protrusions of the boss are not limited. For example, the boss can be a spherical protrusion, a rectangular protrusion, a conical protrusion, etc. In other embodiments, the boss can also be fixedly connected to the first cover or the second cover by means of adhesive bonding, snap-fit, etc., and the specific connection is not limited.

[0046] In other embodiments, similar improvements can be made to the boss, which will not be described in detail here.

[0047] In some embodiments, see Figure 3 , Figure 4 The first cover 10 and the second cover 20 are closed to form an annular flow channel 105, a flow guide cavity 103, and an inlet 108. An annular flame hole 104 is formed at the inner end of the annular flow channel 105. The flow guide cavity 103 surrounds the annular flow channel 105 and communicates with the outer end of the annular flow channel 105. The inlet 108 is located on the outer side of the flow guide cavity 103 away from the annular flow channel 105. The cross-sectional area of ​​the flow guide cavity 103 is larger than the cross-sectional area of ​​the annular flow channel 105. The burner also includes a flow equalization plate 50, which is located in the flow guide cavity 103 on the side close to the annular flow channel 105. The flow equalization plate 50 is provided with a plurality of flow equalization holes 501.

[0048] The gas enters the guide chamber 103 from the inlet 108, then enters the annular guide channel 105, and finally flows to the annular flame hole 104 where it is ignited.

[0049] The inlet 108 is located on the outside of the guide cavity 103 away from the annular guide channel 105. The guide cavity 103 can connect the inlet 108 and the annular guide channel 105. Since the guide cavity 103 surrounds the annular guide channel 105 and is connected to the outer end of the annular guide channel 105, it can improve the uniformity of gas distribution at all points in the annular guide channel 105, thereby improving the uniformity of gas distribution at all points in the annular flame hole 104, and thus improving the heating uniformity. Since the gas flows from the guide cavity 103 to the annular guide channel 105, the cross-sectional area of ​​the guide cavity 103 is larger than the cross-sectional area of ​​the annular guide channel 105, which can increase the flow velocity of the gas in the annular guide channel 105, ensuring the flame continuity and stability of the burner in the working state. Furthermore, the flow equalization plate 50 can guide and equalize the gas flowing from the guide cavity 103 to the annular guide channel 105 through the flow equalization hole 501, improving the uniformity of gas distribution in the annular guide channel 105.

[0050] In some embodiments, see Figure 2 or Figure 6 The first cover 10 includes a first body portion 11 and a first drainage portion 12, the first drainage portion 12 being provided with a first through hole 101; the second cover 20 includes a second body portion 21 and a second drainage portion 22, the second drainage portion 22 being provided with a second through hole 102; see reference Figure 4 The first drainage section 12 is provided with a first through hole 101 at one end and the second drainage section 22 is provided with a second through hole 102 at one end, which is spaced apart by a first distance h to form an annular fire hole 104. The first drainage section 12 and the second drainage section 22 form an annular drainage channel 105 that communicates with the drainage cavity 103 and the annular fire hole 104. The first body section 11 and the second body section 21 form a drainage cavity 103 surrounding the annular drainage channel 105.

[0051] It should be noted that the first diversion section 12 and the second diversion section 22 are arranged at intervals to form an annular diversion channel 105. The annular diversion channel 105 is used to connect the diversion cavity 103 and the annular flame hole 104. The gas in the diversion cavity 103 reaches the annular flame hole 104 through the annular diversion channel 105.

[0052] In the above embodiment, by setting a first distance h between the end of the first drainage part 12 with the first through hole 101 and the end of the second drainage part 22 with the second through hole 102, the first distance h between the end of the first cover 10 with the first through hole 101 and the end of the second cover 20 with the second through hole 102 can be achieved, thereby enabling control of the dimensional accuracy of the annular fire hole 104.

[0053] In some embodiments, see Figure 3 , Figure 4Both the first drainage section 12 and the second drainage section 22 are arranged in the form of annular flat plates.

[0054] The first guide section 12 and the second guide section 22 are arranged parallel to each other along the orientation b of the annular flame hole 104. This allows the annular guide channel 105 to have the same size as the annular flame hole 104. Therefore, by setting the protrusion height of the boss 30 to a first distance h, the first end of the first cover 10 with the first through hole 101 and the second end of the second cover 20 with the second through hole 102 can be spaced apart by a first distance h, thus directly controlling the width of the annular flame hole 104 to be the first distance h. Furthermore, by setting an annular guide channel 105 with the same size and orientation as the annular flame hole 104 between the guide cavity 103 and the annular flame hole 104, the gas flowing towards the annular flame hole 104 can be guided and diverted, increasing the gas flow pressure and ensuring the stability of the gas supply at the annular flame hole 104.

[0055] In other embodiments, the first drainage portion and the second drainage portion may also be configured with other shapes, such as an annular curved panel structure, etc., without being limited to any specific shape.

[0056] In some embodiments, see Figure 2 , Figure 4 , Figure 6 The flow equalization plate 50 includes a connecting part and a flow equalization part. The connecting part is fixedly connected to the first cover 10. The flow equalization part extends toward the second cover 20 and is disposed on the side of the flow guide cavity 103 near the annular flow channel 105. The flow equalization hole 501 is disposed in the flow equalization part.

[0057] In one application scenario, refer to Figure 6 The flow equalization plate 50 has mounting holes 502 on its connecting portion. The flow equalization plate 50 is riveted to the first body portion 11 through the mounting holes 502 to achieve positioning, and then further fixed connection is achieved by welding. In other embodiments, the fixed connection with the first body portion can also be achieved by one or more other methods such as welding and bonding.

[0058] In one application scenario, the flow equalization plate 50 is positioned by positioning points set on the first cover 10 and then welded to the first cover 10 of the burner. Subsequently, the first cover 10 and the second cover 20 are connected by riveting to complete the assembly of the burner.

[0059] In one application scenario, the flow equalization section extends toward and abuts against the second body section 21, enabling the gas to flow from the guide cavity 103 to the annular guide channel 105 through the flow equalization hole 501 as much as possible, thereby improving the flow equalization effect. In another application scenario, the flow equalization section extends toward the second body section 21 and is positioned on the side of the guide cavity 103 near the annular guide channel 105, maintaining a certain installation distance from the second body section 21. This reduces damage to components during assembly and facilitates assembly.

[0060] By molding the flow equalization plate 50, the first body part 11, and the second body part 21 separately, and then connecting the flow equalization plate 50 to the first body part 11, the structure is simple and the production process can be simplified. Moreover, the flow equalization plate 50 can be fixedly connected to the first body part 11 through the connecting part, which can improve the positional stability. The flow equalization part extends toward the second body part 21 and is set on the side of the flow guiding cavity 103 near the annular flow guiding channel 105, which can make the gas near the flow equalization plate flow from the flow guiding cavity 103 to the annular flow guiding channel 105 through the flow equalization hole 501 as much as possible, thereby improving the flow equalization effect.

[0061] In some embodiments, see Figure 2 or Figure 6 The flow equalization plate 50 is an arc-shaped flow equalization plate, which is set on the side of the annular flow channel 105 near the inlet 108.

[0062] In one application scenario, the arc-shaped flow equalization plate is semi-circular or nearly semi-circular and positioned near the inlet 108 to evenly distribute the gas flow within the guide cavity 103 near the inlet 108. Since the gas enters the annular guide cavity 103 from the inlet 108, the gas flow velocity near the inlet 108 is greater. Therefore, the gas supply is more abundant on the side of the annular guide channel 105 near the inlet 108, while the gas flow velocity is lower on the other side of the annular guide channel 105 away from the inlet 108. Therefore, placing the flow equalization plate 50 on the side of the annular guide channel 105 near the inlet 108 can balance the gas flow velocity and gas volume throughout the annular guide channel 105, improving the flame uniformity and stability at the annular flame hole 104.

[0063] In some embodiments, see Figure 5 , Figure 6 The burner also includes a conductive protrusion 40.

[0064] The conductive protrusion 40 is disposed on the second cover 20 and located near the annular flame hole 104, and is configured to contact the electric arc generated by the ignition element. In other applications, the conductive protrusion 40 may also be disposed on the first cover 10.

[0065] In operation, the gas flow in the guide cavity 103 flows to the annular flame hole 104 and is ignited there. When igniting the burner, the ignition element can be brought close to the conductive protrusion 40. The conductive protrusion 40 provides a stable contact point for the ignition element, allowing it to contact the electric arc generated by the ignition element to prevent the arc from running wild and improving the stability of the arc position. This allows the arc to contact the gas flow emitted from the annular flame hole 104, thereby increasing the ignition success rate. The ignition position can be adjusted by changing the position of the conductive protrusion 40. Furthermore, the conductive protrusion 40 can be placed on the first cover 10 or the second cover 20, and the burner assembly can be completed by the first cover 10 and the second cover 20 closing together. This simplifies the overall structure and improves assembly efficiency.

[0066] In one application scenario, refer to Figure 6 The first cover 10 includes a first body portion 11 and a first drainage portion 12, the first drainage portion 12 being provided with a first through hole 101; the second cover 20 includes a second body portion 21 and a second drainage portion 22, the second drainage portion 22 being provided with a second through hole 102; wherein, the first drainage portion 12 and the second drainage portion 22 are both arranged in annular flat plates; wherein, the end of the second drainage portion 22 with the second through hole 102 extends along the direction b of the annular fire hole 104 and protrudes to form a conductive protrusion 40.

[0067] In some embodiments, the conductive protrusion 40 is integrally formed with the first cover 10 or the second cover 20. In other embodiments, one end of the conductive protrusion 40 is fixedly connected to the first cover 10 or the second cover 20, and the other end is disposed near the annular fire hole 104. The fixed connection can be made by welding, bonding, riveting, etc., and is not specifically limited.

[0068] In other embodiments, multiple conductive protrusions 40 may be provided on the first cover 10 or the second cover 20 to further improve the ignition success rate.

[0069] In some embodiments, see Figure 5 The conductive protrusion 40 includes at least two protruding branches spaced circumferentially along the annular fire hole 104.

[0070] Each raised support contributes to improving the positional stability of the arc generated by the ignition element. Two raised supports reduce the risk of a decreased ignition success rate due to the failure of one of the raised supports. For example, in burner applications, food scraps and other debris often fall onto the burner. When such debris lands on a raised support, it can cause that support to malfunction, preventing effective contact with the arc generated by the ignition element. Furthermore, under prolonged high-temperature environments, raised supports are prone to deterioration due to heat, leading to softening, breakage, and potential detachment. Therefore, providing at least two raised supports further enhances the ignition success rate.

[0071] In some embodiments, at least one U-shaped protrusion is formed at one end of the second cover 20 where the second through hole 102 is located, in a direction parallel to the direction b of the annular fire hole 104, serving as a conductive protrusion 40. That is, the conductive protrusion 40 is integrally formed with the second cover 20. This method can realize a conductive protrusion 40 with two protruding branches with a single U-shaped protrusion, which simplifies the structural design and facilitates production and assembly.

[0072] It should be noted that, in some embodiments, the specific location of the connection between the conductive protrusion 40 and the first cover 10 or the second cover 20 is not limited. For example, in some embodiments, see [reference needed]. Figure 5 , Figure 6 The conductive protrusion 40 is provided on the inner wall of the second through hole 102.

[0073] Specifically, in one application scenario, the second through hole 102 includes an inner wall, an upper end wall, and a lower end wall forming the hole wall. The inner wall of the second through hole 102 extends toward the annular fire hole 104 and protrudes to form a conductive protrusion 40.

[0074] The conductive protrusion 40 is formed by the inner wall of the second through hole 102. The conductive protrusion 40 can be integrally formed with the second cover 20, which has a simple structure and is easy to manufacture and assemble.

[0075] In other embodiments, the conductive protrusion may be disposed on the upper or lower end wall of the second through hole. Specifically, one end of the conductive protrusion is fixedly connected to the upper or lower end wall of the second through hole, and the other end extends toward the area enclosed by the annular flame hole and is disposed close to the annular flame hole. Its other end can cooperate with the ignition element and contact the electric arc generated by the ignition element.

[0076] In other embodiments, conductive protrusions may also be provided on the first cover in the manner described above.

[0077] In some embodiments, improving the positioning of the conductive protrusion 40 can further improve the ignition success rate. For example, see... Figure 5 In the closed state, the first cover 10 covers the second cover 20 to form an annular fire hole 104, and the second cover 20 is provided with a conductive protrusion 40 at the second through hole 102.

[0078] Specifically, when igniting the burner, the ignition element is typically positioned above the annular flame hole 104. In this case, since the conductive protrusion 40 is located at the second through hole 102, the ignition element only needs to be placed above the end of the first cover 10 where the first through hole 101 is located and close to the conductive protrusion 40. This allows the ignition element to make arc contact with the conductive protrusion 40 when it emits an arc, improving the positional stability of the arc. Furthermore, since the conductive protrusion 40 is located at the second through hole 102 and the ignition element is placed above the first cover 10, the arc between the conductive protrusion 40 and the ignition element can pass through the gas outlet area of ​​the annular flame hole 104, thus increasing the contact area between the arc and the gas and improving the ignition success rate.

[0079] In one application scenario, the annular flame hole 104 is tilted upwards towards b, and the gas flow emitted from the annular flame hole 104 flows obliquely upwards. The conductive protrusion 40 is located at the lower second cover 20. When the ignition element contacts the conductive protrusion 40 from above the first cover 10, the ignition element and the conductive protrusion 40 can surround the gas flow from both above and below. The electric arc between the ignition element and the conductive protrusion 40 can pass through the gas flow, increasing the contact area between the electric arc and the gas flow.

[0080] In some embodiments, see Figure 5 , Figure 6 The first cover 10 and the second cover 20 are closed to form an inlet 108 that communicates with the flow guide cavity 103. The conductive protrusion 40 is provided on the side away from the inlet 108 near the annular fire hole 104.

[0081] Specifically, the gas flows into the guide cavity 103 from the inlet 108 and then flows to the annular flame hole 104. The annular flame hole 104 is annular. On the side of the annular flame hole 104 close to the inlet 108, the gas flow velocity and flow rate are greater, while on the side of the annular flame hole 104 away from the inlet 108, the gas flow velocity and flow rate are smaller. By placing the conductive protrusion 40 close to the side of the annular flame hole 104 away from the inlet 108, the ignition success rate of the gas flow on the side of the annular flame hole 104 away from the inlet 108 can be improved, and the uniformity of flame distribution throughout the annular flame hole 104 can also be improved.

[0082] In some embodiments, the conductive protrusions 40 and the inlet 108 are distributed circumferentially along the annular flame hole and are arranged opposite to each other. In this way, the ignition success rate of the gas flow at the position opposite to the inlet 108 on the annular flame hole 104 can be improved, and the uniformity of flame distribution at all points of the annular flame hole 104 can be improved.

[0083] In some embodiments, see Figure 6 The conductive protrusion 40 extends in a direction parallel to the orientation b of the annular fire hole 104.

[0084] In this way, not only can the obstruction and blockage of the gas flow from the annular flame hole 104 by the conductive protrusion 40 be reduced, but the conductive protrusion 40 can also be made as close as possible to the gas flow, reducing the distance between the electric arc and the gas flow and improving the ignition success rate.

[0085] In some embodiments, see Figure 4 The annular flame hole 104 is tilted upwards towards the object being heated, so that the flame is directed towards the object being heated, thereby improving heating efficiency.

[0086] In some embodiments, see Figure 2 or Figure 6 The first cover 10 and the second cover 20 are closed to form an inlet 108 that communicates with the guide cavity 103. The first cover 10 also includes a first inlet portion 13, which forms a first flow channel 106 and is connected to the side of the first body portion 11 away from the first guide portion 12. The second cover 20 also includes a second inlet portion 23, which forms a second flow channel 107 and is connected to the side of the second body portion 21 away from the second guide portion 22. In the closed state, the sidewall of the first flow channel 106 and the sidewall of the second flow channel 107 surround each other to form an injection channel, and the injection channel communicates with the inlet 108.

[0087] In one application scenario, the gas flows from the injection channel to the inlet 108, then enters the guide cavity 103, and finally reaches the annular flame hole 104 through the annular guide channel 105.

[0088] In the above manner, an injection channel can be formed, which facilitates the injection of gas into the guide cavity 103 through the injection channel. In one application scenario, the first cover 10 is integrally formed and the second cover 20 is integrally formed. By covering them together, an injection channel, a guide cavity 103, an annular flow channel 105, and an annular flame hole 104 can be formed. The structure is simple and easy to produce and assemble.

[0089] In some embodiments, the first body portion 11 and the second body portion 21 are flanged and fixed, and the first inlet portion 13 and the second inlet portion 23 are flanged and fixed to seal the guide cavity 103 and the injection channel.

[0090] In other embodiments, the first body part and the second body part can be fixedly connected by riveting, welding or other means, or the first inlet part and the second inlet part can be fixedly connected by riveting, welding or other means.

[0091] In some embodiments, the cross-sectional area of ​​the guide cavity 103 gradually decreases toward the side away from the inlet 108. Since the gas flow velocity is greater on the side of the guide cavity 103 closer to the inlet 108, the above arrangement helps to increase the gas flow velocity on the side of the guide cavity 103 away from the inlet 108, thereby improving the uniformity of gas distribution in the guide cavity 103.

[0092] In some embodiments, the first cover 10 and the second cover 20 are made of stainless steel, which can reduce production costs and energy consumption during the production process, simplify the production process, improve the combustion performance of the burner, and thus enhance the user experience.

[0093] In some embodiments, the burner can be used as an inner flame burner, with the annular flame hole 104 tilted upwards towards a.

[0094] Unlike existing technologies, the first cover and the second cover of this application are closed to form a flow guiding cavity. The end of the first cover with the first through hole and the end of the second cover with the second through hole are separated by a first distance, which can form an annular flame hole. The annular flame hole enables the burner to form an annular flame, improves the heating uniformity of the burner, and facilitates the improvement of ignition success rate. Furthermore, the first distance is greater than 0 mm and less than or equal to 4 mm, which can ensure sufficient flame hole area and gas output of the annular flame hole during combustion, improve gas output stability, and improve the stability of flame combustion.

[0095] It is worth noting that the accompanying drawings are only for illustrating the structural and connection relationships of the product in this application, and do not limit the specific structural dimensions of the product in this application.

[0096] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A burner, characterized in that, include: The first cover body has a first through hole; The second cover has a second through hole; The first cover and the second cover are closed to form a flow guiding cavity; wherein, the first through hole and the second through hole are correspondingly arranged, and the end of the first cover with the first through hole and the end of the second cover with the second through hole are spaced apart by a first distance to form an annular fire hole; The first distance is greater than 0 mm and less than or equal to 4 mm.

2. The burner according to claim 1, characterized in that, The first distance is greater than or equal to 1.5 mm and less than or equal to 2.5 mm.

3. The burner according to claim 1, characterized in that, The angle between the orientation of the annular fire hole and the central axis of the annular fire hole is 30° to 60°.

4. The burner according to claim 3, characterized in that, The included angle is 50°.

5. The burner according to claim 1, characterized in that, Also includes: A protrusion is abutting between the first cover and the second cover to limit the size of the annular fire hole to the first distance.

6. The burner according to claim 5, characterized in that, The first cover has at least one protrusion on the side facing the second cover, and the protrusion is welded to the second cover; and / or the second cover has at least one protrusion on the side facing the first cover, and the protrusion is welded to the first cover.

7. The burner according to claim 1, characterized in that, The first cover and the second cover are closed to form an annular drainage channel, a guide cavity, and an inlet. The inner end of the annular drainage channel forms the annular fire hole. The guide cavity surrounds the annular drainage channel and communicates with the outer end of the annular drainage channel. The inlet is located on the outer side of the guide cavity away from the annular drainage channel. The cross-sectional area of ​​the guide cavity is larger than the cross-sectional area of ​​the annular drainage channel. The burner also includes a flow equalization plate, which is disposed in the flow guide cavity on one side near the annular flow channel; the flow equalization plate is provided with a plurality of flow equalization holes.

8. The burner according to claim 7, characterized in that, The flow equalization plate is an arc-shaped flow equalization plate, which is disposed on the side of the annular flow channel near the inlet.

9. The burner according to claim 7, characterized in that, The flow equalization plate includes a connecting part and a flow equalization part. The connecting part is fixedly connected to the first cover, and the flow equalization part extends toward the second cover to be disposed in the flow guiding cavity on the side near the annular flow guiding channel. The flow equalization hole is disposed in the flow equalization part.

10. The burner according to claim 1, characterized in that, The burner also includes: A conductive protrusion is provided on the first cover or the second cover and is located near the annular flame hole, and is configured to contact the electric arc generated by the ignition element.

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