Combustor

Abstract

The utility model provides a combustor. The combustor comprises a first cover body, a second cover body and a boss, 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 boss is arranged between the first cover body and the second cover body in an abutting mode so as to limit the size of the annular fire hole. The heating uniformity of the combustor can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a burner. BACKGROUND

[0002] The burner is widely used in the industry of gas ovens and the like. The burner is usually configured to input fuel such as gas at a certain pressure into the burner in the form of a jet from an inlet, and the gas burns at the fire hole of the burner after flowing through the flow guide cavity of the burner. In the prior art, the burner is usually designed to have multiple gas outlets to form multiple spaced fire holes, and the fuel such as gas burns at the multiple spaced fire holes to form multiple flames, which is prone to uneven heating. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a burner capable of improving the heating uniformity of the burner.

[0004] To solve the above technical problems, the present application provides a burner, which comprises a first cover body, a second cover body, and a boss. 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 combined to form a flow guide cavity. The first through hole and the second through hole are correspondingly arranged. The first cover body is provided with a first distance between one end of the first through hole and one end of the second through hole to form an annular fire hole. The boss is abutted between the first cover body and the second cover body to limit the size of the annular fire hole.

[0005] The burner of the present application comprises a first cover body, a second cover body, and a boss. 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 combined to form a flow guide cavity. The first through hole and the second through hole are correspondingly arranged. The first cover body is provided with a first distance between one end of the first through hole and one end of the second through hole to form an annular fire hole. The boss is abutted between the first cover body and the second cover body to limit the size of the annular fire hole. In this way, the first cover body and the second cover body are combined to form a flow guide cavity, and the first cover body is provided with a first distance between one end of the first through hole and one end of the second through hole to form an annular fire hole. The annular fire hole can make the burner form an annular flame to improve the heating uniformity of the burner. Further, the boss is abutted between the first cover body and the second cover body to limit the size of the annular fire hole, which facilitates assembly and improves the size control precision of the annular fire hole. BRIEF DESCRIPTION OF DRAWINGS

[0006] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without any creative effort. Among them:

[0007] Figure 1 is a structural schematic diagram of an embodiment of the combustor of the present application;

[0008] Figure 2 is Figure 1 an exploded structural schematic diagram of the embodiment;

[0009] Figure 3 is Figure 1 a cross-sectional structural schematic diagram of the embodiment;

[0010] Figure 4 is Figure 3 an enlarged structural schematic diagram of the A area in the embodiment;

[0011] Figure 5 is a structural schematic diagram of another embodiment of the combustor of the present application;

[0012] Figure 6 is Figure 5 an exploded structural schematic diagram of the embodiment. DETAILED DESCRIPTION

[0013] In the following description, specific details are set forth in order to provide a thorough understanding of the embodiments of the present application. However, persons skilled in the art will understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary details.

[0014] The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. It should be understood that when used in the specification and the appended claims, the term "include" indicates the presence of described features, integers, steps, operations, elements, and / or components, but does not exclude one or more other features, integers, steps, operations, elements, components, and / or sets thereof. It should also be understood that the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in the specification and the appended claims of this application, the singular forms "a", "an" and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should be further understood that the term "and / or" used in the specification and the appended claims of this application means any combination of one or more of the associated listed items and all possible combinations thereof, and includes these combinations.

[0015] As used in the specification and the appended claims of this application, the term "if" can be interpreted as "when" or "upon" or "in response to a determination" or "in response to detecting" depending on the context. Similarly, the phrases "if it is determined" or "if [a described condition or event] is detected" can be interpreted to mean "upon determining" or "in response to determining" or "upon detecting [a described condition or event]" or "in response to detecting [a described condition or event]" depending on the context.

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

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] The burner is widely used in the industry of gas oven, etc. The burner is usually used to input the fuel such as gas with a certain pressure into the burner in the form of jet flow from the inlet, and the gas flows through the guide cavity of the burner and reaches the fire hole of the burner to be burned. In the prior art, the burner is usually designed to have multiple gas outlets to form multiple spaced fire holes, and the combustible fluid such as gas is burned at the multiple spaced fire holes to form multiple flames, which is easy to cause uneven heating.

[0019] The fuel used in the burner is usually gas, and can also be liquid fuel with flowability. The following embodiments of the present application will be introduced by taking the burner using gas as an example.

[0020] The present application first proposes a burner, as shown in Figures 1 to 6 , Figure 1 is a structural schematic diagram of an embodiment of the burner of the present application, Figure 2 is Figure 1 an exploded structural schematic diagram of the embodiment, Figure 3 is Figure 1 a cross-sectional structural schematic diagram of the embodiment, Figure 4 is Figure 3 an enlarged structural schematic diagram of the A area in the embodiment, Figure 5 is a structural schematic diagram of another embodiment of the burner of the present application, Figure 6 is Figure 5 an exploded structural schematic diagram of the embodiment. Referring to Figure 1 or Figure 5 , the burner comprises a first cover 10, a second cover 20 and a boss 30; referring to Figure 2 or Figure 6 , the first cover 10 is provided with a first through hole 101; the second cover 20 is provided with a second through hole 102; referring to Figure 3 , the first cover 10 and the second cover 20 are covered to form a guide cavity 103; wherein the first through hole 101 and the second through hole 102 are correspondingly arranged, referring to Figure 4 , the first cover 10 is provided with one end of the first through hole 101 and the second cover 20 is provided with one end of the second through hole 102, and the distance between the two ends is a first distance h to form an annular fire hole 104; the boss 30 is abutted and arranged between the first cover 10 and the second cover 20 to limit the size of the annular fire hole 104.

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

[0022] It should be noted that the first cover body 10 is provided with one end of the first through hole 101 and the second cover body 20 is provided with one end of the second through hole 102, and the first distance h is formed between the two ends to form the annular fire hole 104, so the width size of the annular fire hole 104 is the first distance h; by adjusting the protruding height of the boss 30, the first distance h can be adjusted, so that the boss 30 can realize accurate control of the size of the annular fire hole 104.

[0023] In this way, the first cover body 10 and the second cover body 20 are combined to form the flow guide cavity 103, and the first cover body 10 is provided with one end of the first through hole 101 and the second cover body 20 is provided with one end of the second through hole 102, and the first distance h is set between the two ends to form the annular fire hole 104, which can form the annular flame of the burner, improve the heating uniformity of the burner; further, the boss 30 is arranged between the first cover body 10 and the second cover body 20, which can limit the size of the annular fire hole 104, facilitate assembly, and improve the size control precision of the annular fire hole 104.

[0024] In some embodiments, the first distance h is greater than 0 mm and less than or equal to 4 mm.

[0025] The first distance h can be 0.8 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, or 4 mm, etc. In this way, sufficient fire hole area and gas output of the annular fire hole 104 during combustion can be ensured, the gas stability is improved, and the stability of flame combustion is improved.

[0026] 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.

[0027] For example, the first distance h can be 1.5 mm, 2 mm, 2.25 mm, 2.3 mm, 2.4 mm, or 2.5 mm, etc.

[0028] In an application scenario, the diameter of the circular ring surrounded by the annular fire hole 104 is 80 mm, and the width size of the annular fire hole 104 is greater than or equal to 1.5 mm and less than or equal to 2.5 mm, which can ensure sufficient fire hole area and gas output of the annular fire hole 104 during combustion, improve the gas stability, and improve the stability of flame combustion.

[0029] It should be noted that the boss 30 can be formed by the first cover body 10, or formed by the second cover body 20, or the boss 30 is a separate structure and can abut against the first cover body 10 and the second cover body 20. The following is an example.

[0030] In some embodiments, referring to Figure 3 , Figure 4The side of the first cover 10 facing the second cover 20 is formed with at least one boss 30.

[0031] For example, in one application scenario, the boss 30 can be formed by stamping the first cover 10 in the direction facing the second cover 20, and in the state of covering of the first cover 10 and the second cover 20, the boss 30 abuts against the second cover 20; in other application scenarios, the boss 30 can also be cast on the first cover 10, and the specific manner is not limited.

[0032] In this way, the number of parts of the burner can be reduced, and the complexity of production and assembly can be simplified.

[0033] In some embodiments, the side of the first cover 10 facing the second cover 20 is formed with at least one boss 30, and the boss 30 is welded and fixed with the second cover 20.

[0034] 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 flame hole 104 can be improved.

[0035] In other embodiments (not shown), the side of the second cover facing the first cover is formed with at least one boss. In this way, the number of parts of the burner can be reduced, and the complexity of production and assembly can be simplified.

[0036] For example, in one application scenario, the boss can be formed by stamping the second cover in the direction facing the first cover, and in the state of covering of the second cover and the first cover, the boss abuts against the first cover; in other application scenarios, the boss can also be cast on the second cover, and the specific manner is not limited.

[0037] In some embodiments, the side of the second cover facing the first cover is formed with at least one boss, and the boss is welded and fixed with the first cover. In this way, the stability of the relative position of the first cover and the second cover can be improved, and the dimensional accuracy of the annular flame hole can be improved.

[0038] In some embodiments, referring to Figure 1 or Figure 5 The burner includes a plurality of bosses 30, and the plurality of bosses 30 are uniformly distributed around the circumference x of the annular flame hole 104.

[0039] It should be noted that the specific forming manner of the plurality of bosses 30 is not limited, for example, the first cover 10 can be protruded towards the second cover 20 to form the plurality of bosses 30, or the first cover 10 and the second cover 20 can jointly form the plurality of bosses 30, and the specific manner can be referred to the above embodiments, which will not be described here.

[0040] In this way, the plurality of bosses 30 are uniformly distributed around the circumference x of the annular flame hole 104, which can improve the dimensional accuracy of the annular flame hole and improve assembly convenience.

[0041] In other embodiments, the first cover body is formed with at least one boss on a side facing the second cover body, and the second cover body is formed with at least one boss on a side facing the first cover body.

[0042] In this way, the bosses are arranged on the first cover body and the second cover body, which can further improve the structural stability of the burner and improve the dimensional control accuracy of the annular flame hole.

[0043] In other embodiments, the bosses are not limited in height, shape, and number, for example, the bosses can be spherical protrusions, rectangular protrusions, conical protrusions, etc.

[0044] In other embodiments, the bosses can be fixedly connected to the first cover body or the second cover body by bonding, clamping, or the like, which is not limited in detail.

[0045] In other embodiments, similar improvements can be made to the bosses, which are not described here.

[0046] In some embodiments, referring to Figure 2 , Figure 3 , Figure 4 , the first cover body 10 includes a first body portion 11 and a first flow guide portion 12, referring to Figure 2 or Figure 6 , the first flow guide portion 12 is provided with a first through hole 101; the second cover body 20 includes a second body portion 21 and a second flow guide portion 22, the second flow guide portion 22 is provided with a second through hole 102; referring to Figure 4 , the boss 30 is arranged in abutment between the first flow guide portion 12 and the second flow guide portion 22, so that the first flow guide portion 12 and the second flow guide portion 22 are spaced apart to form an annular flow guide passage 105 in communication with the flow guide cavity 103 and the annular flame hole 104, the first body portion 11 and the second body portion 21 form the flow guide cavity 103 surrounding the annular flow guide passage 105; the cross-sectional area of the flow guide cavity 103 is greater than the cross-sectional area of the annular flow guide passage 105.

[0047] It should be noted that the first flow guide portion 12 and the second flow guide portion 22 are spaced apart to form the annular flow guide passage 105, which is used to communicate the flow guide cavity 103 and the annular flame hole 104, and the gas in the flow guide cavity 103 reaches the annular flame hole 104 through the annular flow guide passage 105.

[0048] By the above manner, the boss 30 is abutted between the first drainage part 12 and the second drainage part 22, which can make the channel width of the annular drainage channel 105 equal to the protruding height of the boss 30, so that by adjusting the height of the boss 30, the first end of the first cover body 10 provided with the first through hole 101 and the first end of the second cover body 20 provided with the second through hole 102 are arranged at a first distance h, which can realize the control of the size precision of the annular flame hole 104; further, the flow guide cavity 103 arranged around the annular drainage channel 105 can improve the uniformity of the gas distribution at each part of the annular flame hole 104, thereby improving the heating uniformity; further, since the gas flows from the flow guide cavity 103 to the annular drainage channel 105, the cross-sectional area of the flow guide cavity 103 is greater than that of the annular drainage channel 105, which can improve the flow rate of the gas in the annular drainage channel 105, and ensure the flame continuity and stability of the burner in the working state.

[0049] In some embodiments, at least one boss 30 is formed on the side of the first drainage part 12 facing the second drainage part 22, or at least one boss 30 is formed on the side of the second drainage part 22 facing the first drainage part 12, so that the boss 30 is arranged 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 are spaced apart to form an annular drainage channel 105 communicating with the flow guide cavity 103 and the annular flame hole 104. The specific arrangement of the boss 30 can refer to the above embodiments, which will not be described here.

[0050] In some embodiments, referring to Figure 2 、 Figure 3 , the first drainage part 12 and the second drainage part 22 are both arranged in the form of annular plates.

[0051] The first drainage part 12 and the second drainage part 22 are arranged in parallel along the direction b of the annular flame hole 104, which can make the size of the annular drainage channel 105 consistent with that of the annular flame hole 104, so that by setting the protruding height of the boss 30 as the first distance h, the first end of the first cover body 10 provided with the first through hole 101 and the first end of the second cover body 20 provided with the second through hole 102 are arranged at a first distance h, which can directly control the width size of the annular flame hole 104 to be the first distance h; further, by the above manner, the annular drainage channel 105 with the same size and the same direction as the annular flame hole 104 is arranged between the flow guide cavity 103 and the annular flame hole 104, which can guide and drain the gas flowing to the annular flame hole 104, improve the gas flow pressure, and ensure the stability of the gas supply at the annular flame hole 104.

[0052] In other embodiments, the first drainage part and the second drainage part can also be arranged in other shapes, such as annular curved plate structures, etc., which are not limited in particular.

[0053] In some embodiments, the direction b of the annular fire hole 104 is inclined upward so that the flame is directed toward the heated object, improving the heating efficiency.

[0054] In some embodiments, referring to Figure 3 、 Figure 4 , the angle B between the direction b of the annular fire hole 104 and the central axis a of the annular fire hole 104 is 30° to 60°.

[0055] In an 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 annular, the central axis a of the annular is parallel to the first direction y, and the angle B between the direction b of the annular fire hole 104 and the direction of the central axis a can be 30°, 33°, 35°, 39°, 40°, 45°, 48°, 50°, 52°, 55°, 56° or 60°, etc. The specific value is not limited.

[0056] 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 fire hole 104 is parallel to the vertical direction, and the angle B between the direction b of the annular fire hole 104 and the direction of the central axis a is 30° to 60°. This can make the angle B between the direction b of the annular fire hole 104 and the vertical direction be 30° to 60°, so that the flame emitted from the annular fire hole 104 is directed toward the bottom of the pot and other heated equipment. Since the smaller the angle B is, the closer the flame is to the pot, and the combustion products after the gas is burned are difficult to meet the national standard; the larger the angle B is, the farther the flame is from the pot, and the heating effect is poorer, so the angle B is preferably 30° to 60°, which can achieve better heating effect and make the combustion products meet the national standard. Further, the angle B between the direction b of the annular fire hole 104 and the direction of the central axis a is preferably 50°, which can achieve better heating effect.

[0057] In some embodiments, referring to Figure 1 、 Figure 2 , the first cover 10 and the second cover 20 are combined to form an inlet 108 that communicates with the flow guide cavity 103; the first cover 10 further comprises a first inlet portion 13 forming a first flow channel 106 and connected to the side of the first body portion 11 away from the first flow guide portion 12; the second cover 20 further comprises a second inlet portion 23 forming a second flow channel 107 and connected to the side of the second body portion 21 away from the second flow guide portion 22; in the combined state, the side wall of the first flow channel 106 and the side wall of the second flow channel 107 form an incident flow channel, and the incident flow channel communicates with the inlet 108.

[0058] In an application scenario, the gas reaches the inlet 108 from the incident flow channel, then enters the flow guide cavity 103, and then reaches the annular fire hole 104 through the annular flow guide channel 105.

[0059] By the above manner, the incident flow channel can be formed, and the gas can be conveniently incident into the flow guide cavity 103 through the incident flow channel; in an application scenario, the first cover body 10 is integrally formed, and the second cover body 20 is integrally formed, and the incident flow channel, the flow guide cavity 103, the annular flow guide channel 105 and the annular flame hole 104 can be formed by covering, and the structure is simple, and the production and assembly are facilitated.

[0060] In some embodiments, the first body part 11 and the second body part 21 are fixed by flanging, and the first incident flow part 13 and the second incident flow part 23 are fixed by flanging to seal the flow guide cavity 103 and the incident flow channel.

[0061] In other embodiments, the first body part and the second body part can also be fixed and connected by riveting, welding and the like, or the first incident flow part and the second incident flow part can also be fixed and connected by riveting, welding and the like.

[0062] In some embodiments, referring to Figure 2 , Figure 3 , Figure 4 , the burner further comprises a flow uniformizing plate 50 arranged in the flow guide cavity 103 close to one side of the annular flow guide channel 105; the flow uniformizing plate 50 is provided with a plurality of flow uniformizing holes 501.

[0063] The flow uniformizing plate 50 can guide and uniformize the gas flowing from the flow guide cavity 103 to the annular flow guide channel 105 through the flow uniformizing holes 501, and improve the uniformity of the distribution of the gas in the annular flow guide channel 105.

[0064] In some embodiments, referring to Figure 2 , Figure 4 , the flow uniformizing plate 50 comprises a connecting part and a flow uniformizing part, and the connecting part is fixedly connected with the first body part 11; the flow uniformizing part extends towards the second body part 21 to be arranged at one side of the flow guide cavity 103 close to the annular flow guide channel 105, and the flow uniformizing holes 501 are arranged in the flow uniformizing part.

[0065] In an application scenario, referring to Figure 6 , the connecting part of the flow uniformizing plate 50 is provided with a mounting hole 502, the flow uniformizing plate 50 is fixedly connected with the first body part 11 by riveting through the mounting hole 502 to realize positioning, and then fixedly connected by welding. In other embodiments, the fixed connection with the first body part can also be realized by one or more of welding, bonding and the like.

[0066] In an application scenario, after the flow uniformizing plate 50 is positioned by the positioning point arranged on the first cover body 10, the flow uniformizing plate 50 is welded on the first cover body 10 of the burner, and then the first cover body 10 and the second cover body 20 are connected by the riveting process to complete the assembly of the burner.

[0067] In an application scenario, the flow equalizing portion extends towards the second body portion 21 and abuts against the second body portion 21, so that the gas can flow from the flow guide cavity 103 to the annular flow guide passage 105 through the flow equalizing holes 501 as much as possible, thereby improving the flow equalizing effect; in another application scenario, the flow equalizing portion extends towards the second body portion 21 to be arranged on a side of the flow guide cavity 103 close to the annular flow guide passage 105 and keep a certain installation spacing with the second body portion 21, thereby reducing the damage to the parts during assembly and facilitating assembly.

[0068] In the above manner, the flow equalizing plate 50, the first body portion 11 and the second body portion 21 are separately formed, and then the flow equalizing plate 50 is arranged in connection with the first body portion 11, so that the structure is simple and the production process can be simplified; the flow equalizing plate 50 can be fixedly connected to the first body portion 11 through the connecting portion, so that the positional stability can be improved; the flow equalizing portion extends towards the second body portion 21 to be arranged on a side of the flow guide cavity 103 close to the annular flow guide passage 105, so that the gas near the flow equalizing plate can flow from the flow guide cavity 103 to the annular flow guide passage 105 through the flow equalizing holes 501 as much as possible, thereby improving the flow equalizing effect.

[0069] In some embodiments, referring to Figure 2 or Figure 6 , the flow equalizing plate 50 is an arc-shaped flow equalizing plate arranged on a side of the annular flow guide passage 105 close to the inflow port 108.

[0070] In an application scenario, the arc-shaped flow equalizing plate is semicircular or semicircular-like and arranged close to the inflow port 108, so that the gas near the inflow port 108 in the flow guide cavity 103 can be flow-equalized. Since the gas enters the annular flow guide cavity 103 from the inflow port 108, the gas flow speed near the inflow port 108 is greater, so that the gas supply is more sufficient on a side of the annular flow guide passage 105 close to the inflow port 108, and the gas flow speed is smaller on another side of the annular flow guide passage 105 away from the inflow port 108. Therefore, arranging the flow equalizing plate 50 on the side of the annular flow guide passage 105 close to the inflow port 108 can balance the gas flow speed and the gas amount at different positions of the annular flow guide passage 105, thereby improving the uniformity and stability of the flame at the annular flame hole 104.

[0071] In some embodiments, the cross-sectional area of the flow guide cavity 103 gradually decreases on a side away from the inflow port 108.

[0072] Since the gas flow speed near the inflow port 108 in the flow guide cavity 103 is greater, the above arrangement helps to increase the gas flow speed on a side of the flow guide cavity 103 away from the inflow port 108, thereby improving the uniformity of the gas distribution in the flow guide cavity 103.

[0073] In some embodiments, the first cover 10 and the second cover 20 are made of stainless steel, which can reduce the production cost and energy consumption in the production process, simplify the production process, improve the combustion performance of the burner, and thus improve the user experience.

[0074] In some embodiments, the burner can be used as an inner flame burner, and the direction a of the annular flame hole 104 is arranged upwardly.

[0075] In some embodiments, referring to Figure 5 , Figure 6 , the burner further comprises a conductive protrusion 40.

[0076] The conductive protrusion 40 is arranged on the second cover 20 and is arranged close to the annular flame hole 104 and is configured to contact the electric arc generated by the ignition device. In other application scenarios, the conductive protrusion 40 can also be arranged on the first cover 10.

[0077] In the working state, the gas in the flow guide cavity 103 flows to the annular flame hole 104 and is ignited at the annular flame hole 104. When igniting the burner, the ignition device can be arranged close to the conductive protrusion 40, the conductive protrusion 40 can provide a stable contact point for the ignition device, can contact the electric arc generated by the ignition device to prevent the electric arc from running away, improve the stability of the electric arc position, so that the electric arc contacts the gas flow emitted by the annular flame hole 104, thereby improving the ignition success rate, and the ignition position can be adjusted by changing the position of the conductive protrusion 40; further, the conductive protrusion 40 is arranged on the first cover 10 or the second cover 20, and the assembly of the burner is completed by covering the first cover 10 and the second cover 20, which can simplify the overall structure and improve the assembly efficiency.

[0078] In an application scenario, referring to Figure 6 , the first cover 10 comprises a first body portion 11 and a first flow guide portion 12, and the first flow guide portion 12 is provided with a first through hole 101; the second cover 20 comprises a second body portion 21 and a second flow guide portion 22, and the second flow guide portion 22 is provided with a second through hole 102; wherein the first flow guide portion 12 and the second flow guide portion 22 are both arranged in the form of an annular plate; wherein one end of the second flow guide portion 22 provided with the second through hole 102 extends and protrudes along the direction b of the annular flame hole 104 to form the conductive protrusion 40.

[0079] In some embodiments, the conductive protrusion 40 is integrally formed with the first cover 10 or the second cover 20, and in other embodiments, one end of the conductive protrusion 40 is fixedly connected with the first cover 10 or the second cover 20, and the other end is arranged close to the annular flame hole 104. The fixed connection can be welding, bonding, riveting, etc., which is not limited in particular.

[0080] In other embodiments, a plurality of conductive protrusions 40 can also be arranged on the first cover 10 or the second cover 20 to further improve the ignition success rate.

[0081] In some embodiments, referring to Figure 5 , the conductive protrusions 40 include at least two protruding branches arranged along the circumferential direction x of the annular fire hole 104.

[0082] Each protruding branch can play a role in improving the position stability of the electric arc generated by the ignition element, and the two protruding branches can reduce the risk of a decline in the ignition success rate caused by the failure of a protruding branch. For example, in the use scenario of the burner, food residue and other debris will often fall on the burner. When the food residue and other debris fall on a protruding branch, the protruding branch will fail to form effective contact with the electric arc generated by the ignition element. For another example, in a long-term high-temperature environment, the protruding branch is prone to deterioration due to high temperature, and risks such as softening and falling off. Therefore, arranging at least two protruding branches is conducive to further improving the ignition success rate.

[0083] In some embodiments, the second cover 20 is arranged with at least one U-shaped protrusion at one end of the second through hole 102 in a direction parallel to the direction b of the annular fire hole 104, as the conductive protrusion 40. That is, the conductive protrusion 40 is integrally formed with the second cover 20. This way, the conductive protrusion 40 with two protruding branches can be realized by one U-shaped protrusion, which can simplify the structural design and facilitate production and assembly.

[0084] It should be noted that in some embodiments, the specific arrangement position 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, referring to Figure 5 , Figure 6 , the conductive protrusion 40 is arranged on the inner wall of the second through hole 102.

[0085] Specifically, in an application scenario, the second through hole 102 includes an inner wall forming a hole wall, an upper end wall, and a lower end wall. The inner wall of the second through hole 102 extends towards the annular fire hole 104 to form the conductive protrusion 40.

[0086] By forming the conductive protrusion 40 on the inner wall of the second through hole 102, the conductive protrusion 40 can be integrally formed with the second cover 20, which is simple in structure and facilitates production and assembly.

[0087] In other embodiments, the conductive protrusion can also be arranged on the upper end wall or the lower end wall of the second through hole. Specifically, one end of the conductive protrusion is fixedly connected with the upper end wall or the lower end wall of the second through hole, and the other end extends towards the area surrounded by the annular fire hole and is arranged close to the annular fire hole. The other end of the conductive protrusion can cooperate with the ignition element and be in contact with the electric arc generated by the ignition element.

[0088] In other embodiments, the conductive protrusion can also be arranged on the first cover body in the above-mentioned manner.

[0089] In some embodiments, the arrangement position of the conductive protrusion 40 can be further improved to increase the ignition success rate. For example, referring to Figure 5 In the closed state, the first cover body 10 is arranged above the second cover body 20 to form the annular fire hole 104, and the second cover body 20 is provided with the conductive protrusion 40 at the second through hole 102.

[0090] Specifically, when igniting the burner, the ignition tool is usually placed above the burner and close to the annular fire hole 104. In such a case, since the conductive protrusion 40 is arranged at the second through hole 102, the ignition tool only needs to be placed above the first cover body 10 at the end of the first through hole 101 and close to the conductive protrusion 40, so that the arc generated by the ignition tool can contact the conductive protrusion 40, thereby improving the position stability of the arc. In addition, since the conductive protrusion 40 is arranged at the second through hole 102 and the ignition tool is placed above the first cover body 10, the arc between the conductive protrusion 40 and the ignition tool can pass through the gas outlet area of the annular fire hole 104, thereby increasing the contact area between the arc and the gas and improving the ignition success rate.

[0091] In an application scenario, the direction b of the annular fire hole 104 is arranged upwardly, the gas flow emitted from the annular fire hole 104 flows obliquely upwardly, and the conductive protrusion 40 is arranged at the second cover body 20 below. When the ignition tool contacts the conductive protrusion 40 from above the first cover body 10, the ignition tool and the conductive protrusion 40 can surround the gas flow from the top and bottom directions, and the arc between the ignition tool and the conductive protrusion 40 can pass through the gas flow, thereby increasing the contact area between the arc and the gas flow.

[0092] In some embodiments, referring to Figure 5 , Figure 6 The first cover body 10 and the second cover body 20 are closed to form an inlet 108 that communicates with the flow guide cavity 103, and the conductive protrusion 40 is arranged close to the side of the annular fire hole 104 away from the inlet 108.

[0093] Specifically, the gas flows into the flow guide cavity 103 from the inlet 108 and then flows to the annular fire hole 104. The annular fire hole 104 is annular, and the flow rate and flow of the gas flow are greater on the side of the annular fire hole 104 close to the inlet 108, and the flow rate and flow of the gas flow are smaller on the side of the annular fire hole 104 away from the inlet 108. Arranging the conductive protrusion 40 close to the side of the annular fire hole 104 away from the inlet 108 can improve the ignition success rate of the gas flow on the side of the annular fire hole 104 away from the inlet 108 and improve the uniformity of the flame distribution of the annular fire hole 104.

[0094] In some embodiments, the conductive protrusions 40 and the inflow ports 108 are arranged opposite to each other along the circumferential direction of the annular flame hole. In this way, the ignition success rate of the gas flow at the position opposite to the inflow ports 108 on the annular flame hole 104 can be improved, and the uniformity of the flame distribution of the annular flame hole 104 can be improved.

[0095] In some embodiments, referring to Figure 6 , the extension direction of the conductive protrusions 40 is parallel to the orientation b of the annular flame hole 104.

[0096] In this way, not only can the conductive protrusions 40 reduce the obstruction and shielding of the gas flow from the annular flame hole 104, but also can make the conductive protrusions 40 as close as possible to the gas flow, reduce the distance between the electric arc and the gas flow, and improve the ignition success rate.

[0097] Different from the prior art, the first cover and the second cover of the present application are combined to form a flow guide cavity, and the first cover is arranged at a first distance from the one end of the first through hole and the second cover is arranged at a second distance from the one end of the second through hole, so as to form an annular flame hole. The annular flame hole can make the burner form an annular flame, thereby improving the heating uniformity of the burner. Further, the boss is arranged between the first cover and the second cover to limit the size of the annular flame hole, facilitate assembly, and improve the size control precision of the annular flame hole.

[0098] It is worth noting that the drawings in the present application are only used to show the structural relationship and connection relationship of the product of the present application, and do not limit the specific structural size of the product of the present application.

[0099] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A burner, characterized by The burner comprises: a first cover body provided with a first through hole; a second cover body provided with a second through hole; the first cover body and the second cover body are combined to form a flow guide cavity; wherein the first through hole and the second through hole are correspondingly arranged, and one end of the first cover body provided with the first through hole is arranged at a first distance from one end of the second cover body provided with the second through hole to form an annular fire hole; a boss is arranged in abutment between the first cover body and the second cover body to limit the size of the annular fire hole.

2. The burner of claim 1, wherein At least one boss is formed on one side of the first cover body facing the second cover body, and / or at least one boss is formed on one side of the second cover body facing the first cover body.

3. The burner of claim 1, wherein The first cover body comprises a first body part and a first drainage part, and the first drainage part is provided with the first through hole; The second cover body comprises a second body part and a second drainage part, and the second drainage part is provided with the second through hole; The boss is arranged in abutment between the first drainage part and the second drainage part, so that the first drainage part and the second drainage part are spaced apart to form an annular drainage channel in communication with the flow guide cavity and the annular fire hole, and the first body part and the second body part form the flow guide cavity surrounding the annular drainage channel; the cross-sectional area of the flow guide cavity is greater than the cross-sectional area of the annular drainage channel.

4. The burner of claim 3, wherein The first drainage part and the second drainage part are both arranged in the form of an annular flat plate.

5. The burner of claim 1, wherein The burner comprises a plurality of bosses, and the plurality of bosses are uniformly distributed around the circumference of the annular fire hole.

6. The burner of claim 2, wherein At least one boss is formed on one side of the first cover body facing the second cover body, and the boss is welded to the second cover body; Or at least one boss is formed on one side of the second cover body facing the first cover body, and the boss is welded to the first cover body.

7. The burner of claim 1, wherein The angle between the direction of the annular fire hole and the central axis of the annular fire hole is 30° to 60°.

8. The burner of claim 3, wherein The first cover body and the second cover body are combined to form an inflow port in communication with the flow guide cavity; the first cover body further comprises: a first inflow part forming a first flow channel and connected to one side of the first body part away from the first drainage part; The second cover body further comprises: a second inflow part forming a second flow channel and connected to one side of the second body part away from the second drainage part; In the combined state, the side walls of the first flow channel and the second flow channel jointly form an incident flow channel, and the incident flow channel is in communication with the inflow port.

9. The burner of claim 3, wherein The burner further comprises a flow uniformizing plate arranged in the flow guide cavity close to one side of the annular drainage channel; the flow uniformizing plate is provided with a plurality of flow uniformizing holes.

10. The burner of claim 9, wherein The flow uniformizing plate comprises a connecting part and a flow uniformizing part, the connecting part is fixedly connected to the first body part; the flow uniformizing part extends towards the second body part to be arranged close to one side of the annular drainage channel in the flow guide cavity; the flow uniformizing holes are arranged in the flow uniformizing part.

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