Combustor and stove

Abstract

The utility model provides a burner and a kitchen range, the burner comprises a bottom plate, a gas inlet, a gas outlet, a gas outlet and a gas outlet, the bottom plate is provided with gas inlet holes; the fire cover is mounted on the bottom plate, and a plurality of fire outlet holes are formed in the fire cover; the splitter is installed between the bottom plate and the fire cover, a first cavity communicated with the air inlet hole is defined by the splitter and the bottom plate, a second cavity communicated with the fire cover is defined by the splitter and the fire cover, the first cavity is communicated with the fire outlet hole, a plurality of splitting holes are formed in the splitter, and the splitting holes are communicated with the first cavity and the second cavity; a flow guide structure is arranged on the face, close to the bottom plate, of the splitter, and the air inlet holes correspond to the flow guide structure. According to the scheme, mixed-flow gas is redistributed through the flow dividing holes, after the mixed-flow gas is discharged from the fire outlet holes, the effect that the gas flow speed of the fire outlet holes is consistent can be achieved, and sufficient combustion of fuel gas is achieved. Meanwhile, by achieving uniform distribution of mixed flow gas, the situation that flames are different in length can be avoided, and therefore the backfire risk can be obviously reduced.

Description

Technical Field

[0001] The present application relates to the field of household appliances, and in particular to a burner and a stove. Background Art

[0002] The flame caps of gas equipment can be divided into two types according to the air intake form: central air intake and non-central air intake. In terms of geometric structure, central air intake can effectively ensure uniform airflow at all angles of the circular surface, but in terms of air intake angle, the central air intake will sacrifice most or even all of the central air intake area. Non-central air intake can effectively utilize the central air intake area, but it also has the problem of too fast air flow around the air intake hole and too low flow rate at the far end, which will directly affect the uniformity of the combustion flame and there is a risk of flashback.

[0003] Therefore, how to improve the uniformity of the combustion flame of the non-central air intake fire cover and reduce the risk of flashback of the non-central air intake fire cover has become an urgent problem to be solved. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present application is to provide a burner.

[0006] A second aspect of the present application is to provide a stove.

[0007] The technical solution of the first aspect of the present application provides a burner, including: a base plate, on which an air inlet is arranged; a fire cover, installed on the base plate, on which a plurality of fire outlet holes are arranged; a diverter plate, installed between the base plate and the fire cover, and forming a first cavity connected to the air inlet with the base plate, and forming a second cavity with the fire cover, the first cavity is connected to the fire outlet hole, a plurality of diverter holes are arranged on the diverter plate, and the diverter holes connect the first cavity and the second cavity; wherein a guide structure is arranged on the surface of the diverter plate close to the base plate, and the air inlet hole is arranged corresponding to the guide structure.

[0008] The burner provided according to the present application includes a base plate, a diverter plate and a fire cover. The base plate and the diverter plate form a first cavity, and the mixed gas of the gas and air can enter the first cavity through the air inlet hole, and then enter the second cavity through the diverter plate. The function of the diverter plate is to redistribute the mixed gas through the diverter hole so that the mixed gas can pass through the diverter plate more evenly, and maximize the uniformity of the air flow entering each part of the upper air cavity. In this way, after the mixed gas is discharged from each fire outlet, the gas flow rate of each fire outlet can be consistent, thereby improving the air coefficient and achieving full combustion of the gas. At the same time, by achieving uniform distribution of the mixed gas, it is also possible to avoid uneven flame lengths, thereby significantly reducing the risk of flashback. In particular, when a thin-walled stainless steel fire cover is used, the probability of flashback can be greatly reduced.

[0009] Furthermore, the flow guide structure is arranged corresponding to the air inlet hole, and further, the flow guide structure can be arranged directly opposite to the air inlet hole, so that the mixed flow gas from the air inlet hole can be guided to both sides of the flow guide structure through the flow guide structure, for example, the mixed flow gas can be smoothly divided to the left and right sides, so as to minimize the air flow resistance. According to simulation calculation, the primary air coefficient of the structure is basically the same as the primary air coefficient when there is no splitter, so that the air coefficient can be further improved to achieve full combustion of the gas.

[0010] Among them, generally speaking, the setting of the diverter will increase the gas flow resistance, thereby reducing the primary air coefficient and worsening the combustion condition. Because, if the guide structure is not set, the diverter is a plane, and the mixed gas directly acts on the bottom plane of the diverter along the axial direction, and then can flow to both sides under the rebound effect on the bottom plane of the diverter. In this process, the bottom plane of the diverter will form a large obstruction to the mixed gas, reducing the potential energy of the mixed gas, which will slow down the subsequent flow rate of the mixed gas, thereby increasing the gas flow resistance. In this application, by designing a guide structure on the diverter, the airflow can be smoothly divided to the left and right sides to avoid the mixed gas from hitting the bottom plane of the diverter and causing energy loss, thereby minimizing the airflow resistance, thereby compensating for the defects of large gas flow resistance and poor combustion conditions caused by setting the guide.

[0011] Optionally, the guide structure includes a guide protrusion, which extends from the diverter plate toward the bottom plate, and the surface of the guide protrusion away from the diverter plate includes: two guide surfaces, the first ends of the two guide surfaces are connected to each other, and the second ends of the two guide surfaces extend along the circumference of the diverter plate in a direction away from the first end, and the distance between the guide surface and the bottom plate increases from the first end to the second end.

[0012] In this technical solution, the flow-guiding structure is a protrusion with a flow-guiding function. The flow-guiding protrusion includes two flow-guiding surfaces. After the mixed gas acts on the flow-guiding protrusion, it can extend along the two flow-guiding surfaces on both sides, that is, it can extend to both sides with the position of the air inlet as the center in the first cavity, so that the airflow can be smoothly divided to the left and right sides, thereby minimizing the airflow resistance.

[0013] The distance between the guide surface and the bottom plate increases from the first end to the second end, that is, the guide surface is tilted from bottom to top from the first end to the second end, that is, the first end is at the lowest position and the second end is at the highest position. In this way, a relatively smooth guide surface can be formed, making the mixed gas flow more smoothly guided.

[0014] Optionally, the connection position of the two guide surfaces is arranged corresponding to the air inlet, that is, the air inlet is aligned with the first ends of the two guide surfaces, so that the airflow can be evenly distributed.

[0015] Furthermore, guide grooves may be provided on the guide surface to guide the airflow.

[0016] Optionally, the angle between the two guide surfaces is greater than or equal to 90° and less than or equal to 160°.

[0017] In this technical solution, by limiting the angle between the two guide surfaces to 90° to 160°, the air flow distribution can be made more uniform, thereby reducing the gas flow resistance, increasing the primary air coefficient, and making the combustion more complete. Experiments show that when the angle between the two guide surfaces is limited to 90° to 160°, CO (carbon monoxide) emissions are the lowest.

[0018] Optionally, the two guide surfaces are symmetrically arranged, so that the airflow guided by the guide protrusion to both sides can be more balanced, which can further improve the air coefficient and achieve full combustion of the gas.

[0019] Optionally, the guide protrusion is formed by bending the diverter sheet toward the bottom plate.

[0020] In this technical solution, a part of the flow diverter plate can be bent or recessed along the direction of the bottom plate to form a flow guide protrusion. This method can ensure the integrated structure of the flow guide member, thereby ensuring the strength of the flow guide member.

[0021] Optionally, the first width of the guide protrusion along the radial direction of the flow dividing plate decreases from the first end to the second end, that is, the width of the guide protrusion decreases from the center to both sides, so that the mixed flow gas can enter the second cavity more conveniently and smoothly, thereby improving the smoothness of the mixed flow gas supply.

[0022] Optionally, the guide protrusion includes an inner end and an outer end arranged along the radial direction of the diverter plate, and the first width of the inner end is greater than the first width of the outer end.

[0023] This arrangement makes the structure of the guide protrusion more reasonable, so that the guide protrusion can have a better guide effect and a smaller wind resistance.

[0024] Optionally, a channel for secondary air to pass through is provided on the diverter plate, and a plurality of diverter holes are provided around the channel and located in the same annular area.

[0025] In this technical solution, a first channel is provided on the diverter plate, and diverter holes are provided around the first channel, and a plurality of diverter holes are distributed in an annular area. The plurality of diverter holes are concentrated in an annular area to facilitate the staggered setting between the plurality of diverter holes and the fire outlet holes, thereby effectively improving the anti-flashback effect.

[0026] Optionally, the flow-dividing holes are long strip holes and are arranged along the circumferential direction of the flow-dividing plate, and a plurality of flow-dividing holes are arranged at intervals from each other, thereby reducing the number of flow-dividing holes.

[0027] Exemplarily, the number of the diversion holes is four.

[0028] Optionally, the guide protrusion is at least partially located on the annular area, and the multiple diverter holes include a first diverter hole arranged outside the guide protrusion and a second diverter hole arranged on the guide protrusion; the width of the second diverter hole along the radial direction of the diverter plate is smaller than the width of the first diverter hole along the radial direction of the diverter plate.

[0029] In this technical solution, the diverter holes are arranged on the guide protrusion, and the diverter holes are also arranged on other areas outside the guide protrusion, so as to ensure the total conduction area of ​​the diverter holes, and at the same time, the distribution of the diverter holes can be more dispersed. In this way, the uniform flow ability of the diverter plate can be improved, so that the mixed gas after the gas and air are mixed can be evenly distributed on the fire cover after passing through the diverter plate, so as to avoid the problems of uneven flame length and poor combustion sufficiency caused by uneven diversion of the mixed gas.

[0030] In addition, since the second diverter hole is closer to the air inlet hole and the first diverter hole is farther from the air inlet hole, in order to ensure the uniformity of air intake of the second diverter hole and the first diverter hole, the widths of the second diverter hole and the first diverter hole in the radial direction are also set differently. Specifically, in the radial direction, the width of the second diverter hole is smaller than the width of the first diverter hole. In this way, the air flow of the first diverter hole and the second diverter hole can be more uniform, thereby effectively reducing backfire.

[0031] Optionally, the circumferential length of the guide protrusion on the annular area is less than or equal to 1 / 4 of the circumferential length of the annular area, and greater than or equal to 1 / 8 of the circumferential length of the annular area.

[0032] In this technical solution, the circumferential length of the guide protrusion cannot be too large, otherwise the space between the diverter sheet and the bottom plate will be too small, thereby occupying too much space in the second cavity. Of course, the circumferential length of the guide protrusion cannot be too small, otherwise it will not play the role of guiding and diverting.

[0033] Optionally, the fire cover includes a first area, a second annular area arranged circumferentially along the first area, and a third annular area arranged circumferentially along the second annular area, the fire outlet holes are arranged on the first area and the third annular area, and the diversion holes are arranged corresponding to the second annular area.

[0034] In this technical solution, a plurality of inner fire holes are evenly arranged on the first area, and a plurality of outer fire holes are evenly arranged on the third annular area. The first area and the third annular area are separated from each other by the second annular area. A fire transmission channel is arranged on the second annular area, and the flame in the first area can be transmitted to the third annular area through the fire transmission channel, and then the gas on the third annular area is burned. In this arrangement, since the fire cover is arranged to include an inner and outer fire hole structure, the fire hole area can be increased to ensure sufficient combustion of the gas.

[0035] In addition, the diverter holes on the diverter plate are arranged corresponding to the second annular area, so that the diverter holes on the diverter plate avoid the fire holes on the first area and the third annular area, thereby realizing the staggered setting between the diverter holes and the fire holes, thereby preventing the occurrence of backfire and making the product have better safety performance.

[0036] Optionally, the diversion hole and the fire outlet hole are arranged in a staggered manner.

[0037] In this technical solution, the diverter hole and the fire outlet hole are staggered, that is, the diverter hole and the fire outlet hole are not arranged in the same vertical direction, but are staggered, that is, the diverter hole and the fire outlet hole are not directly vertically connected, so that the problem of fast gas outlet rate of some fire outlet holes and slow gas outlet rate of some fire outlet holes can be avoided, that is, this setting can ensure the uniformity of gas outlet of the fire cover and avoid the flashback phenomenon caused by uneven gas outlet of the fire cover. In this way, the flashback phenomenon can be prevented, and the product has better safety performance.

[0038] Optionally, a gap is provided between the fire cover and the diverter plate, and a height of the gap is greater than or equal to 0 mm and less than or equal to 2 mm.

[0039] In this technical solution, there is a gap between the fire cover and the diverter plate, that is, in the vertical direction, at least part of the fire cover and the diverter plate is provided with a height difference, and the height difference constitutes the gap between the two. The height of the gap is less than or equal to 2 mm, which can achieve the best anti-flashback. Because 2 mm is less than the flameout diameter of the equipment, that is, within this range, the flame will be extinguished, thereby reducing the probability of the flame burning between the fire cover and the diverter plate, thereby achieving the best anti-flashback effect.

[0040] Optionally, the burner also includes: a secondary air channel, which runs through the base plate, the diverter plate and the fire cover, and the secondary air channel is not connected to the first cavity and the second cavity; a plurality of support protrusions are arranged on the outer bottom surface of the base plate, and the base plate forms a support mounting surface for supporting and mounting the base plate through the plurality of support protrusions, and the secondary air channel is connected to the bottom space of the base plate.

[0041] Optionally, the burner further comprises an ejector pipe connected to the bottom plate and communicated with the first cavity. The air and the gas can be mixed and transported to the first cavity through the ejector pipe.

[0042] Optionally, a fire transfer channel is further provided on the second annular region, and the fire transfer channel is connected with the first region and the second annular region. The fire transfer channel can realize flame transfer between the inner and outer fire holes.

[0043] Optionally, the secondary air passage passes through the first area, and the fire outlet holes on the first area are arranged around the secondary air passage.

[0044] Optionally, the fire cover is an integrated structure, that is, the first area of ​​the inner fire hole and the third annular area and the second annular area of ​​the outer fire hole are an integrated structure. Further, the fire cover is integrally formed.

[0045] The technical solution of the second aspect of the present application provides a stove, including the burner provided by the technical solution of the first aspect.

[0046] According to the stove provided in the present application, since it includes the burner provided by the technical solution of the first aspect, the stove also has all the beneficial effects of the burner provided by any technical solution of the first aspect, which will not be repeated here.

[0047] Additional aspects and advantages of the present application will become apparent in the following description or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0049] Figure 1 One of the structural schematic diagrams of a burner according to an embodiment of the present application is shown;

[0050] Figure 2 Shows Figure 1 Schematic diagram of the cross section at AA in the middle;

[0051] Figure 3 A second structural schematic diagram of a burner according to an embodiment of the present application is shown;

[0052] Figure 4 A third structural schematic diagram of a burner according to an embodiment of the present application is shown;

[0053] Figure 5 A fourth structural schematic diagram of a burner according to an embodiment of the present application is shown;

[0054] Figure 6 Shows Figure 1 Schematic diagram of the cross section at BB;

[0055] Figure 7 A fifth structural schematic diagram of a burner according to an embodiment of the present application is shown;

[0056] Figure 8 A sixth structural schematic diagram of a burner according to an embodiment of the present application is shown;

[0057] Fig. 9 FIG7 shows a structural schematic diagram of a burner according to an embodiment of the present application;

[0058] Fig.10 Shows Fig. 9 Schematic diagram of the cross section at CC;

[0059] Fig.11 Shows Fig. 9 Schematic diagram of the cross section at DD in the middle.

[0060] Reference numerals:

[0061] 1 bottom plate, 12 air inlet, 14 supporting protrusion, 2 fire cover, 22 fire outlet hole, 222 inner fire hole, 224 outer fire hole, 24 first area, 26 second annular area, 28 third annular area, 29 fire transfer channel, 3 diverter plate, 32 diverter hole, 322 first diverter hole, 324 second diverter hole, 34 guide structure, 342 guide protrusion, 3422 guide surface, 4 first cavity, 5 second cavity, 6 ejector tube, 7 secondary air channel, 8 mixed gas. DETAILED DESCRIPTION

[0062] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0063] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0064] Refer to the following Figures 1 to 11 To describe the burner and stove provided according to some embodiments of the present application.

[0065] An embodiment of the first aspect of the present application provides a burner, comprising a base plate 1 , a diverter plate 3 and a fire cover 2 .

[0066] The bottom plate 1 is provided with an air inlet 12, the structure of which is as follows: Figure 8 The fire cover 2 is mounted on the bottom plate 1, and a plurality of fire outlet holes 22 are provided on the fire cover 2. The structure is as shown in FIG. Figure 1 , Figure 3 and Figure 7 shown.

[0067] like Figure 2 and Figure 3 As shown, the diverter plate 3 is installed between the base plate 1 and the fire cover 2, and together with the base plate 1 forms a first cavity 4 connected to the air inlet hole 12, and together with the fire cover 2 forms a second cavity 5, the first cavity 4 is connected to the fire outlet hole 22, and a plurality of diverter holes 32 are provided on the diverter plate 3, and the diverter holes 32 connect the first cavity 4 and the second cavity 5.

[0068] Among them, Figure 3 , Figure 4 and Fig. 9 As shown, a flow guiding structure 34 is arranged on the surface of the flow dividing plate 3 close to the bottom plate 1 , and the air inlet 12 is arranged corresponding to the flow guiding structure 34 .

[0069] The burner provided by the present application includes a base plate 1, a diverter plate 3 and a fire cover 2. The base plate 1 and the diverter plate 3 form a first cavity 4, and the mixed gas 8 of the gas and air can enter the first cavity 4 through the air inlet 12, and then enter the second cavity 5 through the diverter plate 3. The function of the diverter plate 3 is to redistribute the mixed gas 8 through the diverter hole 32, so that the mixed gas 8 can pass through the diverter plate 3 more evenly, and the air flow entering each part of the upper air cavity is guaranteed to be uniform to the maximum extent. In this way, after the mixed gas 8 is discharged from each fire outlet 22, the gas flow rate of each fire outlet 22 can be consistent, so that the air coefficient can be improved and the full combustion of the gas can be achieved. At the same time, by achieving uniform distribution of the mixed gas 8, the flame length can be avoided, so that the risk of flashback can be significantly reduced. Especially when a thin-walled stainless steel fire cover 2 is used, the probability of flashback can be greatly reduced.

[0070] Furthermore, if Figure 3 , Figure 4 and Fig. 9 As shown, the guide structure 34 is arranged corresponding to the air inlet 12. Further, the guide structure 34 can be arranged directly opposite to the air inlet 12, so that the mixed flow gas 8 from the air inlet 12 can be guided to both sides of the guide structure 34 through the guide structure 34. For example, the mixed flow gas 8 can be smoothly divided to the left and right sides, so as to minimize the air flow resistance. According to simulation calculation, the primary air coefficient of the structure is basically the same as the primary air coefficient when there is no splitter 3, so that the air coefficient can be further improved to achieve full combustion of the gas.

[0071] Alternatively, if Figure 3 , Figure 4 and Fig. 9 As shown, the guide structure 34 includes a guide protrusion 342, which extends from the diverter plate 3 toward the bottom plate 1. The surface of the guide protrusion 342 away from the diverter plate 3 includes: two guide surfaces 3422, the first ends of the two guide surfaces 3422 are connected to each other, and the second ends of the two guide surfaces 3422 extend along the circumference of the diverter plate 3 in a direction away from the first end, and the distance between the guide surface 3422 and the bottom plate 1 increases from the first end to the second end.

[0072] In this embodiment, the flow guiding structure 34 is a protrusion with a flow guiding function. The flow guiding protrusion 342 includes two flow guiding surfaces 3422. After the mixed gas 8 acts on the flow guiding protrusion 342, it can extend along the two flow guiding surfaces 3422 along both sides, that is, it can extend to both sides with the position of the air inlet 12 as the center in the first cavity 4, so that the airflow can be smoothly divided to the left and right sides, thereby minimizing the airflow resistance.

[0073] Among them, Figure 3 As shown, the distance between the guide surface 3422 and the bottom plate 1 increases from the first end to the second end, that is, the guide surface 3422 is tilted from bottom to top from the first end to the second end, that is, the first end is at the lowest position and the second end is at the highest position. In this way, a relatively smooth guide surface 3422 can be formed, so that the mixed gas 8 is guided more smoothly.

[0074] Optionally, the connection position of the two guide surfaces 3422 is arranged corresponding to the air inlet hole 12. That is, the air inlet hole 12 is aligned with the first ends of the two guide surfaces 3422, so that the airflow can be evenly distributed.

[0075] Furthermore, a guide groove may be provided on the guide surface 3422 to guide the airflow.

[0076] Alternatively, if Figure 3 As shown, the angle between the two guide surfaces 3422 is greater than or equal to 90° and less than or equal to 160°.

[0077] In this embodiment, the airflow distribution can be made more uniform by limiting the angle between the two guide surfaces 3422 to 90° to 160°, thereby reducing the gas flow resistance, increasing the primary air coefficient, and making the combustion more complete. Experiments show that when the angle between the two guide surfaces 3422 is limited to 90° to 160°, the CO (carbon monoxide) emission is the lowest.

[0078] Alternatively, if Figure 3 and Figure 4 As shown, the two guide surfaces 3422 are symmetrically arranged. This can make the airflow guided to both sides by the guide protrusion 342 more balanced, which can further improve the air coefficient and achieve full combustion of the gas.

[0079] Alternatively, if Figure 3 As shown, the guide protrusion 342 is formed by bending the diverter plate 3 toward the bottom plate 1 .

[0080] In this embodiment, a portion of the flow diverter plate 3 may be bent or recessed along the direction of the bottom plate 1 to form a flow guide protrusion 342. This method can ensure the integral structure of the flow guide component, thereby ensuring the strength of the flow guide component.

[0081] Alternatively, if Figure 4 As shown, the first width of the guide protrusion 342 in the radial direction of the flow dividing plate 3 decreases from the first end to the second end. That is, the width of the guide protrusion 342 decreases from the center to both sides, so that the mixed gas can enter the second cavity 5 more conveniently and smoothly, thereby improving the smoothness of the mixed gas supply.

[0082] Alternatively, if Figure 3 and Figure 4 As shown, the guide protrusion 342 includes an inner end and an outer end arranged along the radial direction of the diverter plate 3, and the first width of the inner end is greater than the first width of the outer end.

[0083] This arrangement makes the structure of the guide protrusion 342 more reasonable, so that the guide protrusion 342 can have a better guide effect and a smaller wind resistance.

[0084] Alternatively, if Fig. 9 As shown, the diverter plate 3 is provided with a channel for secondary air to pass through (ie, the hole in the middle of the diverter plate 3), and a plurality of diverter holes 32 are arranged around the channel and located in the same annular area.

[0085] In this embodiment, a first channel is provided on the diverter plate 3, and the diverter holes 32 are provided around the first channel, and the plurality of diverter holes 32 are distributed in an annular area. The plurality of diverter holes 32 are concentrated in an annular area to facilitate the staggered setting between the plurality of diverter holes 32 and the fire outlet holes 22, thereby effectively improving the anti-flashback effect.

[0086] Alternatively, if Fig. 9 As shown, the flow dividing holes 32 are long strip holes and are arranged along the circumferential direction of the flow dividing plate 3, and a plurality of flow dividing holes 32 are arranged at intervals from each other, so that the number of the flow dividing holes 32 can be reduced.

[0087] For example, Fig. 9 As shown, the number of the diverter holes 32 is four.

[0088] Alternatively, if Fig. 9 As shown, the guide protrusion 342 is at least partially located on the annular area, and the multiple diverter holes 32 include a first diverter hole 322 arranged outside the guide protrusion 342 and a second diverter hole 324 arranged on the guide protrusion 342; the width of the second diverter hole 324 along the radial direction of the diverter plate 3 is smaller than the width of the first diverter hole 322 along the radial direction of the diverter plate 3.

[0089] In this embodiment, the diverter hole 32 is provided on the guide protrusion 342, and the diverter hole 32 is also provided on other areas outside the guide protrusion 342, so as to ensure the total conduction area of ​​the diverter hole 32, and at the same time, the distribution of the diverter hole 32 can be more dispersed. In this way, the uniform flow ability of the diverter plate 3 can be improved, so that the mixed flow gas after the gas and air are mixed can be evenly distributed on the fire cover 2 after passing through the diverter plate 3, so as to avoid the problems of uneven flame length and poor combustion sufficiency caused by uneven diversion of the mixed flow gas 8.

[0090] In addition, since the second diverter hole 324 is relatively close to the air inlet hole 12 and the first diverter hole 322 is relatively far from the air inlet hole 12, in order to ensure the uniformity of the air intake of the second diverter hole 324 and the first diverter hole 322, the widths of the second diverter hole 324 and the first diverter hole 322 in the radial direction are also set differently. Specifically, in the radial direction, the width of the second diverter hole 324 is smaller than the width of the first diverter hole 322, so that the air flow of the first diverter hole 322 and the second diverter hole 324 can be more uniform, thereby effectively reducing backfire.

[0091] Optionally, the circumferential length of the guide protrusion 342 on the annular region is less than or equal to 1 / 4 of the circumferential length of the annular region, and greater than or equal to 1 / 8 of the circumferential length of the annular region.

[0092] In this embodiment, the circumferential length of the guide protrusion 342 cannot be too large, otherwise the space between the diverter sheet 3 and the bottom plate 1 will be too small, thereby occupying too much space in the second cavity 5. Of course, the circumferential length of the guide protrusion 342 cannot be too small, otherwise it cannot play the role of guiding and diverting.

[0093] Alternatively, if Figure 7As shown, the fire cover 2 includes a first area 24 and a second annular area 26 circumferentially arranged along the first area 24 and a third annular area 28 circumferentially arranged along the second annular area 26 . The fire holes 22 are arranged on the first area 24 and the third annular area 28 , and the diversion holes are arranged corresponding to the second annular area 26 .

[0094] In this embodiment, a plurality of inner fire holes 222 are evenly arranged on the first area 24, and a plurality of outer fire holes 224 are evenly arranged on the third annular area 28. The first area 24 and the third annular area 28 are separated from each other by the second annular area 26. A fire transfer channel 29 is arranged on the second annular area 26, and the flame in the first area 24 can be transferred to the third annular area 28 through the fire transfer channel 29, and then the gas on the third annular area 28 is burned. In this arrangement, since the fire cover 2 is arranged to include the inner and outer fire holes 224, the fire hole area can be increased to ensure sufficient combustion of the gas.

[0095] In addition, if Figure 1 , Figure 4 and Figure 7 As shown, the diverter hole 32 on the diverter plate is arranged corresponding to the second annular area 26, so that the diverter hole 32 on the diverter plate avoids the fire holes 22 on the first area 24 and the third annular area 28, thereby achieving the staggered setting between the diverter hole 32 and the fire holes 22, thereby preventing the occurrence of backfire and making the product have better safety performance.

[0096] Alternatively, if Figure 1 , Figure 4 and Figure 7 As shown, the diverter hole 32 and the ignition hole 22 are arranged offset from each other.

[0097] In this embodiment, the diverter hole 32 and the fire outlet hole 22 are staggered, that is, the diverter hole 32 and the fire outlet hole 22 are not arranged in the same vertical direction, but are staggered, that is, the diverter hole 32 and the fire outlet hole 22 are not directly vertically connected, so that the problem of the gas outlet rate of some fire outlet holes 22 being fast and the gas outlet rate of some fire outlet holes 22 being slow can be avoided, that is, this arrangement can ensure the uniformity of the gas outlet of the fire cover 2 and avoid the flashback phenomenon caused by the uneven gas outlet of the fire cover 2. In this way, the flashback phenomenon can be prevented, so that the product has better safety performance.

[0098] Alternatively, if Figure 6 As shown, a gap d is provided between the fire cover 2 and the diverter plate 3, and the height of the gap d is greater than or equal to 0 mm and less than or equal to 2 mm.

[0099] In this embodiment, there is a gap d between the fire cover 2 and the diverter plate 3, that is, in the vertical direction, at least part of the fire cover 2 and the diverter plate 3 is provided with a height difference, and the height difference constitutes the gap between the two. The height of the gap is less than or equal to 2 mm, which can achieve the best anti-flashback. Because 2 mm is less than the flameout diameter of the equipment, that is, within this range, the flame will be extinguished, thereby reducing the probability of the flame burning between the fire cover 2 and the diverter plate, thereby achieving the best anti-flashback effect.

[0100] Alternatively, if Figure 1 , Figure 5 and Figure 7 As shown, the burner also includes: a secondary air channel 7, which runs through the base plate 1, the diverter plate 3 and the fire cover 2, and the secondary air channel 7 is not connected to the first cavity 4 and the second cavity 5; a plurality of support protrusions 14 are arranged on the outer bottom surface of the base plate 1, and the base plate 1 forms a supporting mounting surface for supporting and mounting the base plate 1 through the plurality of support protrusions 14, and the secondary air channel 7 is connected to the bottom space of the base plate 1.

[0101] Alternatively, if Figure 8 As shown, the burner further comprises an ejector pipe 6, which is connected to the bottom plate 1 and communicates with the first cavity 4. The ejector pipe 6 can be used to mix air and gas and then transport them to the first cavity 4.

[0102] Alternatively, if Figure 7 As shown, a fire transfer channel 29 is also provided on the second annular region 26, and the fire transfer channel 29 is connected with the first region 24 and the second annular region 26. The fire transfer channel 29 can realize the flame transfer between the inner and outer fire holes 224.

[0103] Optionally, the secondary air passage 7 passes through the first area 24 , and the fire holes on the first area 24 are arranged around the secondary air passage 7 .

[0104] Optionally, the fire cover 2 is an integrated structure, that is, the first area 24 of the inner fire hole 222 and the third annular area 28 and the second annular area 26 of the outer fire hole 224 are an integrated structure. Further, the fire cover 2 is integrally formed.

[0105] Optionally, the cross-sectional shape of the fire cover 2 is substantially the same as the cross-sectional shape of the diverter plate 3. Fig.10 and Fig.11 shown.

[0106] An embodiment of a second aspect of the present application provides a cooker, comprising the burner provided by the embodiment of the first aspect.

[0107] According to the stove provided in the present application, since it includes the burner provided in the embodiment of the first aspect, the stove also has all the beneficial effects of the burner provided in any embodiment of the first aspect, which will not be repeated here.

[0108] The burner of the present application is described in further detail below in conjunction with a specific embodiment.

[0109] With the rapid development of gas equipment at home and abroad, the specific structure of the fire cover 2, which is the structure that carries the main combustion function, has changed with each passing day. According to the air intake form, they can be divided into two types: central air intake and non-central air intake. The fire cover 2 is mostly a circular surface when viewed from above. In terms of geometric structure, the central air intake can effectively ensure uniform airflow at all angles of the circular surface, but in terms of the air intake angle, the central air intake will sacrifice most or even all of the central air intake area; while the non-central air intake can effectively utilize the central air intake area, but there is also a corresponding problem of excessive airflow velocity around the air intake hole 12 and too small flow velocity at the far end, which will directly affect the uniformity of the combustion flame and the risk of flashback. A reasonable structure of the diverter 3 can effectively improve the uneven airflow and flashback problems associated with the non-central air intake technology.

[0110] In the related schemes, the flow divider 3 is mostly a flat orifice plate, and its structure is very simple. According to experimental tests, the effect of the flat orifice plate flow divider 3 in alleviating uneven airflow is very limited, and the outflow velocity of the fire hole near the airflow inlet is still very large, which is not conducive to combustion; compared with the case without the flow divider 3, the primary air coefficient is significantly reduced, which is not conducive to full combustion; the application in some fire covers 2 can reduce CO (carbon monoxide) emissions, but in other parts of the fire covers 2, CO (carbon monoxide) emissions are significantly increased, which has a counter-effect and limited versatility.

[0111] Disadvantages of related technologies:

[0112] 1. The flat orifice plate type flow divider has limited effect in making the air flow uniform, which will significantly reduce the primary air coefficient and is not conducive to complete combustion.

[0113] 2. It will reduce the combustion efficiency of some fire covers, significantly increase their CO (carbon monoxide) emissions, and have poor versatility.

[0114] 3. It is impossible to solve the flashback risk caused by using thin-wall burners.

[0115] The general structure of the burner involved in this embodiment is as follows Figures 1 to 8 As shown, the structure of the bottom plate 1 is as follows Figure 6 and Figure 8 As shown. Figure 6 As shown, the ejector tube 6 is placed under the bottom plate 1, and the fire cover 2 is placed on the bottom plate 1. The fire cover 2 and the bottom plate 1 are surrounded by an inner cavity. The diverter plate 3 is placed in the inner cavity, dividing the inner cavity into an upper gas cavity (second cavity 5) and a lower gas cavity (first cavity 4). The mixed gas (combustion gas and primary air) is injected from one end of the ejector tube 6, and then enters the inner cavity surrounded by the fire cover 2 and the bottom plate 1 after passing through the ejector tube 6. After flowing through the diverter plate 3, it is ejected from the fire hole and burned.

[0116] When there is no diverter plate 3 or a partial diverter plate 3 is used, the fire hole close to one end of the ejector tube 6 ejects a large airflow, and the fire hole far away from the other end ejects a small airflow speed, which will result in: 1) uneven airflow distribution, different flame lengths, and poor combustion completeness; 2) the flame length far away from the end of the ejector tube 6 is short, and there is a risk of flashback (especially when a thin-walled stainless steel fire cover 2 is used).

[0117] The global flow divider 3 involved in this embodiment is placed in the inner cavity formed by the bottom plate 1 and the fire cover 2, dividing the inner cavity into two (upper gas cavity and lower gas cavity). When the mixed gas enters the lower gas cavity from the terminal of the ejector tube 6, the through holes on the gas divider redistribute the airflow, which can maximize the uniformity of the airflow entering the upper gas cavity, thereby achieving a consistent gas flow rate at each fire hole.

[0118] Generally speaking, the inner cavity flow divider 3 will increase the gas flow resistance, thereby reducing the primary air coefficient and worsening the combustion condition. The flow divider 3 is designed with an airfoil structure (such as Figure 3 and Figure 4 The guide protrusion 342 shown in the figure is directly opposite to the outlet terminal of the ejector tube 6, which can smoothly divide the airflow to the left and right sides, thereby minimizing the airflow resistance. According to simulation calculation, the primary air coefficient of this structure is basically the same as the primary air coefficient without the splitter.

[0119] To achieve the best anti-flashback, the gap d between the upper surface of the diverter plate 3 and the inner surface of the fire cover 2 should be less than 2 mm, and the diverter hole 32 of the diverter plate 3 cannot face the fire hole. Here, as a schematic diagram, an inner and outer double ring fire hole structure is given, so that the through hole of the diverter plate 3 is arranged in the center, avoiding the position directly below the fire hole.

[0120] like Figure 3 As shown, the airfoil structure of the flow divider 3 faces the air inlet 12 of the bottom plate 1, and its expansion angle α is preferably controlled between 90° and 160° according to simulation calculations and experimental data, so that CO (carbon monoxide) emissions are minimized. The airfoil structure is symmetrically arranged.

[0121] The beneficial effects of the above embodiments are as follows:

[0122] 1. The proposed new structure of the splitter 3 can more reasonably distribute the velocity of the near and far airflows of the inlet of the non-center air intake fire cover 2, and effectively even out the outflow velocity of each fire hole.

[0123] 2. The primary air coefficient is higher than that without the splitter 3, making the combustion more complete.

[0124] 3. It has obvious effects on different fire covers 2, has good versatility, and significantly reduces CO (carbon monoxide) emissions.

[0125] 4. Can effectively prevent backfire.

[0126] It should be noted that, in the above embodiment, removing the airfoil structure on the diverter will result in loss of the ejection coefficient, but the anti-flashback feature is still retained. The cross-sectional shape of the diverter can be adjusted according to the cross-sectional shape of the burner, and the position of the through hole on the diverter can also be adjusted according to the position of the fire hole.

[0127] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0128] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A burner, characterized in that: include: A bottom plate, wherein an air inlet hole is arranged on the bottom plate; A fire cover is mounted on the bottom plate, and a plurality of fire outlet holes are provided on the fire cover; A flow divider is installed between the bottom plate and the fire cover, and the bottom plate and the fire cover form a first cavity connected to the air inlet, and the fire cover and the fire cover form a second cavity, the first cavity is connected to the fire outlet, and a plurality of flow dividers are provided on the flow divider, and the flow dividers connect the first cavity and the second cavity; Wherein, a flow guiding structure is arranged on the surface of the diverter plate close to the bottom plate, and the air inlet hole is arranged corresponding to the flow guiding structure.

2. The burner according to claim 1, characterized in that The flow guiding structure comprises a flow guiding protrusion, wherein the flow guiding protrusion extends from the flow dividing sheet toward the bottom plate, and the surface of the flow guiding protrusion away from the flow dividing sheet comprises: Two guide surfaces, the first ends of the two guide surfaces are connected to each other, the second ends of the two guide surfaces extend along the circumference of the diverter plate in a direction away from the first end, and the distance between the guide surface and the bottom plate increases from the first end to the second end.

3. The burner according to claim 2, characterized in that: The angle between the two guide surfaces is greater than or equal to 90° and less than or equal to 160°; and / or The two guide surfaces are symmetrically arranged; and / or The connection position of the two guide surfaces is arranged corresponding to the air inlet hole.

4. The burner according to claim 2, characterized in that: The guide protrusion is formed by bending the diverter sheet toward the bottom plate.

5. The burner according to claim 2, characterized in that: A first width of the guide protrusion in the radial direction of the flow dividing plate decreases from the first end to the second end; and / or The guide protrusion includes an inner end and an outer end arranged along the radial direction of the diverter plate, and the first width of the inner end is greater than the first width of the outer end.

6. The burner according to claim 2, characterized in that The diverter plate is provided with a channel for secondary air to pass through, and a plurality of diverter holes are arranged around the channel and located in the same annular area.

7. The burner according to claim 6, characterized in that The flow-guiding protrusion is at least partially located on the annular area, and the plurality of flow-dividing holes include a first flow-dividing hole arranged outside the flow-guiding protrusion and a second flow-dividing hole arranged on the flow-guiding protrusion; The width of the second flow dividing hole along the radial direction of the flow dividing plate is smaller than the width of the first flow dividing hole along the radial direction of the flow dividing plate.

8. The burner according to claim 7, characterized in that The circumferential length of the guide protrusion on the annular area is less than or equal to 1 / 4 of the circumferential length of the annular area, and greater than or equal to 1 / 8 of the circumferential length of the annular area.

9. The burner according to any one of claims 1 to 8, characterized in that The diversion hole and the fire outlet hole are arranged in a staggered manner.

10. The burner according to claim 9, characterized in that The fire cover includes a first area, a second annular area arranged circumferentially along the first area, and a third annular area arranged circumferentially along the second annular area. The fire outlet holes are arranged on the first area and the third annular area, and the diversion holes are arranged corresponding to the second annular area.

11. The burner according to any one of claims 1 to 8, characterized in that A gap is provided between the fire cover and the diverter plate, and a height of the gap is greater than or equal to 0 mm and less than or equal to 2 mm.

12. A cooking appliance, characterized in that: Comprising the burner according to any one of claims 1 to 11.

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