Burner and gas hob comprising same

Abstract

The utility model discloses a kind of burner and gas cooking utensil comprising it, burner includes gas mixing chamber and fire cover, gas mixing chamber and fire cover jointly form the gas mixing cavity of burner, fire cover is equipped with fire transmission structure, gas mixing chamber is opened with at least two secondary air passages, along the axial direction of burner, the projection of fire transmission structure on gas mixing chamber is located in the range of gas mixing chamber, and it is located between two secondary air passages, the inlet of gas mixing cavity is below fire transmission structure;Burner further includes shielding structure, shielding structure is set in gas mixing cavity, shielding structure is between the inlet of gas mixing cavity and fire transmission structure. By making secondary air passage and fire transmission structure misregistration set in height direction, avoid the secondary air at the outlet of secondary air passage and affect the fire transmission of fire transmission structure due to flowing upwards, so that fire transmission structure does not need to set again convex fire platform structure, to simplify fire cover structure, reduce processing difficulty.

Description

Technical Field

[0001] This utility model relates to the field of stoves, and in particular to a burner and a gas stove containing the burner. Background Technology

[0002] Existing burner cap structures, such as the burner cap structure provided in Chinese Patent Publication No. CN211372411U, in order to ensure the reliability of the ignition transmission structure set on the cap, an additional horizontally protruding small protrusion is designed at the ignition inlet located on the inner side of the cap as an ignition platform. This is used to solve the influence of secondary air flowing at the secondary air inlet below the ignition transmission structure on the stability of ignition transmission. However, this ignition platform structure on the cap brings difficulties to mold design and machining, resulting in high processing costs for the cap. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of complex burner cap structure and high processing cost in the prior art, and to provide a burner and a gas stove containing the burner.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A burner includes a mixing chamber and a flame cap, the mixing chamber and the flame cap together forming a mixing cavity of the burner, the flame cap being provided with a flame transfer structure, the mixing chamber having at least two secondary air passages along the axial direction of the burner, the projection of the flame transfer structure on the mixing chamber being located within the range of the mixing chamber and between the two secondary air passages, and the inlet of the mixing cavity being located below the flame transfer structure;

[0006] The burner also includes a shielding structure disposed within the mixing chamber, the shielding structure being located between the inlet of the mixing chamber and the ignition transmission structure.

[0007] This burner, by placing the ignition transmission structure between two secondary air channels in the axial direction of the burner, and staggering the secondary air channels and the ignition transmission structure in the height direction, avoids the secondary air at the outlet of the secondary air channels from affecting the ignition transmission of the ignition transmission structure due to upward flow. This allows the ignition transmission structure to stably transmit ignition without the need for an outwardly protruding ignition platform structure. Furthermore, the projection of the ignition transmission structure on the mixing chamber can be completely within the range of the mixing chamber, thereby simplifying the burner cap structure and reducing the manufacturing difficulty of the burner cap.

[0008] Meanwhile, a shielding structure is installed in the mixing chamber, located between the inlet of the mixing chamber and the ignition structure, to shield the gas flowing to the ignition structure instead of the secondary air passage. This prevents the gas flow rate to the ignition structure from being too fast, thus avoiding the problem of excessively fast gas flow rate and low ignition success rate caused by the misalignment of the secondary air passage and the ignition structure.

[0009] Preferably, the ignition transmission structure includes:

[0010] A flame transmission channel located on the burner cap, the flame transmission channel penetrating the burner cap radially;

[0011] A fire transmission hole is located within the fire transmission channel, and the fire transmission hole is internally connected to the gas mixing chamber. The projection of the fire transmission channel is located within the range of the shielding structure.

[0012] Preferably, the number of the fire transmission holes is at least three;

[0013] Wherein, at least one of the fire transmission holes is located inside the fire transmission channel, and the fire transmission hole is inclined inward.

[0014] And / or, at least one of the fire-transfer holes is located on the middle side of the fire-transfer channel, and the fire-transfer hole is arranged facing upwards;

[0015] And / or, at least two of the fire-transfer holes are located outside the fire-transfer channel, and the fire-transfer holes are inclined outward, wherein the two fire-transfer holes are symmetrically arranged within the fire-transfer channel.

[0016] By arranging multiple flame-transfer holes on the inner, middle, and outer sides of the flame-transfer channel, the flame transmission capability of the flame-transfer structure can be improved. Specifically, by providing inwardly inclined flame-transfer holes on the inner side, it facilitates the transmission of flame from other flame caps on the inner side to the flame-transfer channel. By providing upward-facing flame-transfer holes on the middle side, it facilitates the continued outward transmission of flame. By providing outwardly inclined flame-transfer holes on the outer side, it facilitates the transmission of flame to the flame holes on the outer side of the flame cap, achieving reliable flame transmission.

[0017] In addition, two fire transmission holes are set on the outside of the fire transmission channel and arranged symmetrically to take into account the fire holes on the left and right sides of the fire transmission channel, so that the flame can be quickly transmitted on the fire cover.

[0018] Preferably, the inclination angle of the ignition hole located inside the ignition channel toward the center of the burner is between 25° and 65°.

[0019] The fire transmission capability of the fire transmission hole can be improved by controlling the tilt angle of the fire transmission hole.

[0020] Preferably, the projection of the fire-transfer hole located inside the fire-transfer channel within the fire-transfer channel is entirely within the range of the upper surface of the fire-transfer channel.

[0021] This structural design prevents liquid overflow from clogging the ignition hole. Furthermore, due to the staggered arrangement of the ignition structure and secondary air channel, the flow of secondary air will no longer affect the ignition stability of the ignition structure. Therefore, the projection of the ignition hole within the ignition channel is entirely within the range of the upper surface of the ignition channel, ensuring ignition stability as well.

[0022] Preferably, along the circumference of the burner, the top center of the shielding structure is higher than the top sides.

[0023] The top of the shielding structure is higher in the middle and lower on both sides, and the bottom is higher in the middle and lower on both sides, which facilitates the flow of gas around the shielding structure and avoids turbulence during the flow of gas around the shielding structure.

[0024] Preferably, the width W at the top center of the shielding structure is defined, the diameter of the fire transmission hole is d, and the value of the width W is between 2d and 3d.

[0025] By controlling the width W of the shielding rib, we can avoid the width W being too large, which would reduce the air output of the ignition hole, and at the same time, we can avoid the width W being too small, which would not slow down the airflow.

[0026] Preferably, the distance between the top center of the shielding structure and the fire transmission hole located above it is between 2 and 5 mm.

[0027] By controlling the distance between the top center of the shielding structure and the ignition hole located above the shielding structure, the problem of the gas flow resistance being too great is avoided, as the distance is too large and thus fails to slow down the airflow.

[0028] Preferably, a secondary air channel is provided on the mixing chamber, the total area of ​​the inlet of the secondary air channel is S1, the total area of ​​the inlet of the mixing chamber is S2, and S2≥2S1.

[0029] By controlling the inlet size of the secondary air passage, the size of the secondary air passage is prevented from becoming too large and affecting the total inlet area of ​​the mixing chamber, thus ensuring the gas supply.

[0030] Preferably, the secondary air passage extends horizontally through the mixing chamber from the lower part of the mixing chamber.

[0031] Ideally, S2 ≥ 2.8S1.

[0032] Preferably, there are multiple shielding structures distributed circumferentially within the mixing chamber of the burner, wherein at least one shielding structure corresponds to the ignition structure, and the remaining shielding structures correspond to the respective support legs of the pot support.

[0033] Preferably, the inlet of the mixing chamber is located at the bottom of the mixing chamber.

[0034] Preferably, the shielding structure is integrally formed on the mixing chamber or the flame cap.

[0035] Preferably, the shielding structure is continuously disposed between the outer and inner sidewalls of the mixing chamber along the radial direction of the burner.

[0036] By continuously arranging the shielding structure in the radial direction of the burner, extending from the outer wall of the mixing chamber to the inner wall, the shielding structure's ability to shield the upward-flowing gas can be improved. This further reduces the flow velocity of the gas to the ignition structure, thereby extending the path of the gas from the inlet to the ignition structure without increasing the height of the mixing chamber, thus achieving a flattened burner.

[0037] A gas stove comprising a burner as described above.

[0038] This gas stove, by placing the flame transmission structure between two secondary air channels in the axial direction of the burner, and staggering the secondary air channels and the flame transmission structure in the height direction, avoids the secondary air at the outlet of the secondary air channel from affecting the flame transmission structure due to upward flow. This allows the flame transmission structure to stably transmit flame without the need for an outwardly protruding ignition platform structure. Furthermore, the projection of the flame transmission structure on the mixing chamber can be completely within the range of the mixing chamber, simplifying the burner cap structure and reducing the manufacturing difficulty of the burner cap.

[0039] Meanwhile, because the secondary air passage and the ignition structure are misaligned in the axial direction of the burner, and the inlet of the mixing chamber is located directly below the ignition structure, the lack of a secondary air passage to obstruct the upward flow of the gas leads to an increased gas velocity reaching the ignition structure, affecting ignition stability. Therefore, an obstruction structure is installed within the mixing chamber, positioned between the inlet and the ignition structure. This obstruction structure prevents the gas from flowing in a straight line from the mixing chamber inlet to the ignition structure, thus preventing excessively fast gas velocity and avoiding the problem of low ignition success rate caused by the misalignment of the secondary air passage and the ignition structure.

[0040] The positive and progressive effects of this utility model are as follows:

[0041] The burner and the gas stove containing it have a flame transfer structure set between two secondary air channels in the axial direction of the burner. The secondary air channels and the flame transfer structure are staggered in the height direction, which avoids the secondary air at the outlet of the secondary air channel from affecting the flame transfer structure due to upward flow. This eliminates the need for an outwardly protruding ignition platform structure in the flame transfer structure, thus simplifying the burner cap structure and reducing the processing difficulty of the burner cap.

[0042] Meanwhile, a shielding structure is installed in the mixing chamber, located between the inlet of the mixing chamber and the ignition structure, to shield the gas flowing to the ignition structure instead of the secondary air passage. This prevents the gas flow rate to the ignition structure from being too fast, thus avoiding the problem of excessively fast gas flow rate and low ignition success rate caused by the misalignment of the secondary air passage and the ignition structure. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of a gas stove according to an embodiment of the present invention.

[0044] Figure 2 This is a schematic diagram (I) of a gas stove with a hidden pot support, representing one embodiment of the present invention.

[0045] Figure 3 This is a schematic diagram of a burner assembly according to an embodiment of the present invention.

[0046] Figure 4 This is a top view of the mixing chamber according to an embodiment of the present invention.

[0047] Figure 5 This is a top view schematic diagram of the flame cover according to an embodiment of the present invention.

[0048] Figure 6 This is a top view schematic diagram of a burner according to an embodiment of the present invention.

[0049] Figure 7 for Figure 6 A magnified view of part A in the middle.

[0050] Figure 8 for Figure 6 A magnified view of part B in the middle section.

[0051] Figure 9 for Figure 6 A magnified view of part C in the middle.

[0052] Figure 10 This is a schematic diagram (II) of the structure of a gas stove with a hidden pot support, according to one embodiment of the present invention.

[0053] Figure 11 for Figure 10A magnified view of part E in the middle.

[0054] Figure 12 This is a partially enlarged view of the ignition structure according to an embodiment of the present invention.

[0055] Figure 13 This is a schematic diagram of the bottom structure of the mixing chamber according to an embodiment of the present invention.

[0056] Figure 14 This is a partially enlarged view of the flanged portion of the mixing chamber in one embodiment of the present invention.

[0057] Explanation of reference numerals in the attached figures:

[0058] Burner 10

[0059] Fire cap 1

[0060] Flame transfer structure 11

[0061] Fire transmission channel 111

[0062] Fire transfer hole 112

[0063] Fire Hole 12

[0064] Mixing chamber 2

[0065] Shielding structure 21

[0066] Guide structure 22, upper edge 221

[0067] Transition Structure 23

[0068] Fixed structure 24

[0069] Flip 25

[0070] Reinforcing rib 26

[0071] Base 3

[0072] Secondary air passage 4

[0073] Mixing chamber 5, inlet 51

[0074] Liquid collection tray 20

[0075] Pot support 30

[0076] Support foot 301

[0077] Gas stove 100 Detailed Implementation

[0078] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0079] like Figure 1As shown, this utility model provides a gas stove 100, which includes a burner 10 located on the upper surface of a liquid tray 20. Gas flows out from the flame holes 12 on the surface of the burner cap 1 of the burner 10, and combustion produces a flame, which heats the bottom of the pot to achieve the purpose of cooking. A pot support 30 is provided around the burner 10, and four support legs 301 are distributed on the pot support 30. The four support legs 301 jointly support the bottom of the pot. At the same time, the pot support 30 is arranged around the burner 10 in a circumferential direction to form an energy-concentrating plate, so that the heat generated by the flame can be concentrated on the bottom of the pot.

[0080] like Figure 2 As shown, in this embodiment, a secondary air channel 44 is provided on the peripheral surface of the burner 10, specifically on the mixing chamber 2. The secondary air channel 44 extends horizontally inward to the space between the inner and outer rings of the burner 10, so that external air can be supplied to the space between the inner and outer rings through the secondary air channel 44.

[0081] In this embodiment, as Figure 3 As shown, the burner 10 includes, from top to bottom, a flame cap 1, a mixing chamber 2, and a base 3. The mixing chamber 2 and the flame cap 1 together form the mixing cavity 5 of the burner 10. A flame transfer structure 11 is provided on the flame cap 1 corresponding to the outer ring. The gas in the base 3 enters the mixing cavity 5 through the inlet 51 located at the bottom of the mixing chamber 2 and flows out from the flame hole 12 on the flame cap 1 to achieve combustion. At the same time, the gas also flows out from the flame transfer hole 112 in the flame transfer structure 11 to form a flame, transferring the flame from the inner ring to the outer ring to achieve the purpose of flame transfer.

[0082] In this embodiment, as Figure 3 and Figure 4 As shown, the burner 10 also includes a shielding structure 21, which is disposed within the mixing chamber 5, specifically integrally formed on the mixing chamber 2. The shielding structure 21 is located in the height direction between the inlet 51 of the mixing chamber 5 and the ignition transmission structure 11. Figure 4 As shown, along the radial direction of the burner 10, the shielding structure 21 is continuously arranged between the outer and inner sidewalls of the mixing chamber 5.

[0083] The burner 10 has a shielding structure 21 installed in the mixing chamber 5. The shielding structure 21 is located between the inlet 51 of the mixing chamber 5 and the ignition structure 11, and is continuously installed radially between the two walls of the mixing chamber 5. The shielding structure 21 blocks the gas from flowing in a straight line from the inlet 51 of the mixing chamber 5 to the ignition structure 11, so as to extend the path of the gas from the inlet 51 to the ignition structure 11 without increasing the height of the mixing chamber 5, thereby reducing the gas flow velocity to the ignition structure 11 and realizing the flattening of the burner 10.

[0084] In this embodiment, as Figure 4 As shown, not only at the position of the mixing chamber 2 corresponding to the ignition structure 11 ( Figure 4 A shielding structure 21 is provided on the left side of the mixing chamber 2, and a shielding structure 21 is also provided on the right side of the mixing chamber 2.

[0085] By symmetrically arranging shielding structures 21 on the other side of the mixing chamber 2, the structures on both sides are identical, and the gas flow on both sides is roughly balanced. Simultaneously, the shielding structures 21 on both sides correspond to the two support legs 301 of the pot support 30. The shielding structures 21 reduce the gas flow at the corresponding positions, preventing the flame from scorching the support legs 301 and affecting the durability of the pot support 30. In this embodiment, the two shielding structures 21 correspond to the two left and right support legs 301, and the two secondary air channels 4 of the burner 10 correspond to the other two support legs 301.

[0086] like Figure 9 As shown, by providing a shielding structure 21 inside the mixing chamber 5, after the gas enters the mixing chamber 5 inlet 51 from the base 3, it cannot flow in a straight line to the ignition hole 112 of the ignition structure 11 due to the shielding structure 21, but instead flows along... Figure 9 The direction indicated by the dashed arrow bypasses the shielding structure 21, allowing the gas to flow a longer distance within a limited height space, thus optimizing the gas flow path. In this embodiment, the shielding structure 21 is disposed on the mixing chamber 2, specifically between the outer and inner walls of the mixing chamber 2. By installing the burner cap 1 on the mixing chamber 2, the shielding structure 21 is positioned below the ignition structure 11, specifically between the ignition structure 11 and the inlet 51 of the mixing chamber 5. In other embodiments, the shielding structure 21 can also be disposed on the burner cap 1 to shield the ignition structure 11 of the burner cap 1 and optimize the gas flow path. In addition, in a specific structural arrangement, the base 3 is connected to the ejector tube, and gas is supplied to the base 3 through the ejector tube. To further avoid excessive gas velocity at the ignition structure 11, the position of the base 3 connected to the outlet of the ejector tube should be far away from the ignition structure 11 to prevent the gas flow velocity at the outlet of the ejector tube from being too fast, causing the flame to leave the ignition point of the ignition structure 11.

[0087] In this embodiment, the cross-sectional shape of the shielding structure 21 is irregular along the circumference of the burner 10. For example... Figure 9As shown, the top center of the shielding structure 21 is higher than the top two sides, and its cross-section is convex. By making the top center of the shielding structure 21 higher than the two sides, and the bottom center higher than the two sides, it facilitates the flow of gas around the shielding structure 21 and avoids turbulence during the flow of gas around the shielding structure 21. In this embodiment, there is no height difference at the bottom of the shielding structure 21; it is a complete plane. In other embodiments, the bottom of the shielding structure 21 may also have a height difference. By making the bottom center of the shielding structure 21 higher than the bottom two sides, the gas flow path can be further optimized.

[0088] Among them, such as Figure 9 As shown, there is also a preferred width range for the baffle rib at the higher center of the top of the baffle structure 21. Since the baffle rib of the baffle structure 21 is closer to the ignition hole 112 of the ignition structure 11, an excessively large width W will reduce the gas output of the ignition hole 112, while an excessively small width W will not effectively slow down the airflow. Therefore, the preferred value of the width W of the baffle rib is between 2 times the diameter d of the ignition hole 112 and 3 times the diameter d of the ignition hole 112. In addition, the preferred distance between the higher center of the top of the baffle structure 21 (i.e., the top of the baffle rib) and the ignition hole 112 directly above it is between 2 and 5 mm. An excessively large distance will not effectively slow down the airflow, while an excessively small distance will result in excessive resistance to the gas flow.

[0089] In this embodiment, as Figure 7 and Figure 9 As shown, the top of the shielding structure 21 extends upward and is close to the ignition structure 11. Simultaneously, the bottom of the shielding structure 21 extends downward and is close to the inlet 51 of the mixing chamber 5. By placing the shielding structure 21 at both the ignition structure 11 and the inlet 51 of the mixing chamber 5, and placing it close to both, the shielding effect on the combustion gas can be improved.

[0090] like Figure 4 As shown, the burner 10 also includes a flow guiding structure 22, which is disposed within the mixing chamber 5 and is located on both sides of the shielding structure 21 along the circumference of the burner 10. The flow guiding structure 22 is connected to the outer wall of the mixing chamber 5 along the radial direction of the burner 10, allowing the combustion gas to flow between the flow guiding structure 22 and the inner wall of the mixing chamber 5 (see [reference]). Figure 8 (The direction indicated by the dashed arrow).

[0091] By providing a flow guide structure 22 on the side of the shielding structure 21, and connecting the flow guide structure 22 to the outer wall of the mixing chamber 5, the gas flows between the flow guide structure 22 and the inner wall of the mixing chamber 5, so as to guide a portion of the gas flowing through the flow guide structure 22 to flow in an oblique outward direction (see...). Figure 8On the one hand, by guiding the gas to flow at an angle to extend the gas flow path and slow down the gas, on the other hand, the gas can hit the outer inner wall of the burner cap 1 and the flame transmission structure 11, further slowing down the gas flow rate from the burner hole 12.

[0092] Specifically in this embodiment, such as Figure 4 and Figure 8 The flow guiding structure 22 and the shielding structure 21 are connected, specifically by a transition structure 23. The thickness of the portion where the transition structure 23 connects to the shielding structure 21 and the flow guiding structure 22 is the same to facilitate manufacturing. In this embodiment, the shielding structure 21, the flow guiding structure 22, and the transition structure 23 are integrally formed on the mixing chamber 2. By connecting the flow guiding structure 22 to the shielding structure 21, the flow guiding effect of the flow guiding structure 22 on the gas on both sides of the shielding structure 21 is improved. Of course, in other embodiments, the shielding structure 21 and the flow guiding structure 22 can also be independently manufactured parts, which are then fixed to the mixing chamber 2 or the burner cap 1 after manufacturing.

[0093] In this embodiment, the flow guiding structure 22 is disposed on both sides of the shielding structure 21, which ensures gas balance on both sides and improves the flow guiding effect on the combustion gas. Simultaneously, when the airflows on both sides flow upwards and converge below the ignition hole 112, the airflows on both sides can achieve airflow counteraction, further slowing down the airflow velocity at the ignition hole 112, which can reduce the flame length at the ignition hole 112 and improve ignition reliability. Of course, in other embodiments, the flow guiding structure 22 can also be disposed on only one side of the shielding structure 21; the specific number and location can be set according to actual needs.

[0094] In this embodiment, as Figure 8 As shown, the upper edge 221 of the flow guiding structure 22 facing the inner wall of the mixing chamber 5 is rounded, so that the gas flowing upward through this point can flow towards the outer wall of the mixing chamber 5 under the guidance of the rounded or chamfered corners, allowing more gas to flow in an oblique outward direction (see...). Figure 8 This enhances the effect of the flow guide structure 22 in changing the gas flow path. In other embodiments, a chamfer can also be provided at the upper edge 221, which can also enhance the effect of the flow guide structure 22 in changing the gas flow path.

[0095] In addition, in this embodiment, the structure of the flow guiding structure 22 is configured such that the flow direction of the gas after passing through the flow guiding structure 22 is the same as the slope of the flame hole 12 of the burner cap 1. That is, when the gas guided by the flow guiding structure 22 flows to the flame hole 12, the flow direction of the gas is the same as the axial direction of the flame hole 12, so as to increase the gas flow rate to the flame hole 12.

[0096] like Figure 4As shown, along the radial direction of the burner 10, the length of the flow guiding structure 22 is L1, and the distance between the side of the flow guiding structure 22 facing the inner wall of the mixing chamber 5 and the inner wall of the mixing chamber 5 is D. The ratio of L1 to D ranges from 0.9 to 1.1. Specifically, in this embodiment, L1:D = 1.1. By making the length of the flow guiding structure 22 approximately the same as the distance between the flow guiding structure 22 and the inner wall of the mixing chamber 5, a relatively better flow guiding effect is achieved. This avoids both poor flow guiding effect due to the size of the flow guiding structure 22 being too small and insufficient channel size for gas flow due to the size of the flow guiding structure 22 being too large.

[0097] In addition, such as Figure 4 As shown, along the radial direction of the burner 10, the length L1 of the guide structure 22 is less than the length L2 of the transition structure 23, and the length L2 of the transition structure 23 is less than the length L3 of the shielding structure 21; the lengths of the guide structure 22, the transition structure 23 and the shielding structure 21 gradually increase, the guide structure 22 shields about half of the area of ​​the mixing chamber 5, and the shielding structure 21 shields the entire area of ​​the mixing chamber 5.

[0098] In this embodiment, as Figure 3 and Figure 4 As shown, to achieve the connection between the mixing chamber 2 and the base 3, a fixing structure 24 is provided inside the mixing chamber 2. The fixing structure 24 extends radially from the outer side wall of the mixing chamber 2 to the inner side, and has a through hole in the middle, corresponding to the threaded hole on the base 3. By passing a screw through the through hole of the fixing structure 24 and screwing it onto the threaded hole of the base 3, a reliable fixed connection between the mixing chamber 2 and the base 3 can be achieved. In this embodiment, there are four fixing structures 24 for the mixing chamber 2, which are evenly distributed inside the mixing chamber 2.

[0099] like Figure 3 As shown, along the axial direction of the burner 10, the secondary air passage 4 is offset from the ignition structure 11, meaning that the ignition structure 11 is not positioned above the secondary air passage 4. By offsetting the secondary air passage 4 from the ignition structure 11, the upward flow of secondary air at the outlet of the secondary air passage 4 is prevented from affecting the ignition of the ignition structure 11. Simultaneously, a shielding structure 21 is provided between the inlet 51 of the mixing chamber 5 and the ignition structure 11, extending the path of the gas flow from the inlet 51 of the mixing chamber 5 to the ignition structure 11. This ensures that even with the offsetting of the secondary air passage 4 from the ignition structure 11, the gas flow velocity to the ignition structure 11 will not be too fast, thus preventing excessively fast gas flow caused by the offsetting of the secondary air passage 4 from the ignition structure 11 and solving the problem of low ignition success rate.

[0100] Specifically, in this embodiment, with the two secondary air channels 4 arranged horizontally symmetrically on the mixing chamber 2, the ignition structure 11 is set at the position furthest from the secondary air channels 4 in terms of horizontal distance, that is, the horizontal angle between the two secondary air channels 4 and the ignition structure 11 is 90°, so as to maximize the layout while ensuring structural symmetry, so that the two secondary air channels 4 are as far away from the ignition structure 11 as possible, thereby reducing the impact of the airflow of the secondary air channels 4 on the ignition.

[0101] like Figure 5 and Figure 6 As shown, since the secondary air passage 4 in this embodiment is arranged far away from the ignition structure 11, the gas flow rate at the ignition structure 11 is reduced by setting the shielding structure 21 inside. Therefore, the entire ignition structure 11 can be completely located within the mixing chamber 2. There is no need to set additional horizontally protruding air shielding eaves or other structures to shield the secondary air as in the prior art, which further simplifies the structure of the burner 10.

[0102] Additionally, for secondary air passage 4, such as Figure 13 As shown, the secondary air passage 4 horizontally penetrates the lower part of the mixing chamber 2. The total area of ​​the inlet 51 of the secondary air passage 4 is S1, while the total area of ​​the inlet 51 of the mixing chamber 5 is S2. In this embodiment, S2 ≥ 2S1. By controlling the size of the inlet 51 of the secondary air passage 4, the size of the secondary air passage 4 is prevented from being too large and affecting the total area of ​​the inlet 51 of the mixing chamber 5, thus ensuring the gas supply. In a more preferred case, S2 ≥ 2.8S1, to further limit the size of the inlet 51 of the secondary air passage 4 from being too large, so that the burner 10 has sufficient space to accommodate the inlet 51 of the mixing chamber 5, ensuring the gas supply.

[0103] In this embodiment, as Figure 10 and Figure 11 As shown, the ignition structure 11 includes an ignition channel 111 and a plurality of ignition holes 112 disposed within the ignition channel 111. The ignition channel 111 extends radially through the burner cap 1 of the burner 10, and the ignition holes 112 located within the ignition channel 111 communicate inwardly with the mixing chamber 5. The projection of the ignition channel 111 is also located within the range of the shielding structure 21 to achieve a compact layout.

[0104] To ensure effective ignition, multiple ignition holes 112 should be provided within the ignition channel 111, preferably three or more, and they should be evenly distributed within the ignition channel 111. For example, one ignition hole 112 can be located on the inner side of the ignition channel 111, i.e., the ignition channel 111 is close to the inner ring of the burner 10; one ignition hole 112 can be located in the middle of the ignition channel 111; and one ignition hole 112 can be located on the outer side of the ignition channel 111, i.e., the side of the ignition channel 111 facing outwards.

[0105] Specifically in this embodiment, such as Figure 11 and Figure 12 As shown, there are four fire transmission holes 112 in the fire transmission channel 111. One is located on the inner side of the fire transmission channel 111, one is located on the middle side of the fire transmission channel 111, and the remaining two are located on the outer side of the fire transmission channel 111. The two fire transmission holes 112 are symmetrically arranged in the fire transmission channel 111.

[0106] like Figure 12 As shown, all four flame transfer holes 112 are located below the central axis F of the flame transfer channel 111. The flame transfer hole 112 located on the inner side of the flame transfer channel 111 is inclined inwards, the flame transfer hole 112 located on the middle side of the flame transfer channel 111 is upwards, and the two flame transfer holes 112 located on the outer side of the flame transfer channel 111 are inclined outwards and upwards to improve flame transfer efficiency, allowing the flame to spread rapidly along the flame transfer channel 111. Specifically, when flame transfer is required, the inner flame transfer hole 112 is positioned towards the inner ring of the burner 10, facilitating the transfer of flame from the inner ring to the inner flame transfer hole 112. The middle flame transfer hole 112 is upwards, serving as an ignition hole 12 to transfer flame between the inner and outer flame transfer holes 112. The two outer flame transfer holes 112 are positioned outwards, respectively close to the flame holes 12 on both sides of the burner cap 1, to transfer flame to the flame holes 12 on both sides.

[0107] Specifically, the inclination angle of the ignition hole 112 inside the ignition channel 111 towards the inner ring direction is preferably between 25° and 65°. In this embodiment, the inclination angle of the ignition hole 112 inside the ignition channel 111 is 45°. Furthermore, the projection of the ignition hole 112 inside the ignition channel 111 must be completely within the upper surface of the ignition channel 111 to prevent liquid overflow from blocking the ignition hole 112.

[0108] like Figure 7 and Figure 8 As shown, the outer edge of the mixing chamber 2 has a downwardly extending flange 25, forming a cavity between the flange 25 and the outer surface of the mixing chamber 2. The cross-section of the cavity is triangular. In this design, by providing a downwardly extending flange 25 at the outer edge of the mixing chamber 2, and forming a cavity between the flange 25 and the outer surface of the mixing chamber 2, the flow of air at the outer surface of the mixing chamber 2 is reduced, preventing excessive heat loss from the mixing chamber 2. A reinforcing rib 26 is provided between the flange 25 and the outer surface of the mixing chamber 2, extending radially along the burner 100 to structurally reinforce the flange 25 and prevent deformation during long-term use.

[0109] like Figure 14As shown, the lower surface of the flange 25 is positioned close to the upper surface of the liquid-collecting tray 20 to seal the bottom of the cavity using the liquid-collecting tray 20, further reducing airflow at the outer surface of the mixing chamber 2. Specifically, in this embodiment, there is a gap s between the lower surface of the flange 25 and the liquid-collecting tray 20, with the gap s ranging from 0 to 0.5 mm, making the cavity approximately sealed and ensuring a sealing effect. At the same time, the lower surface of the flange 25 does not contact the liquid-collecting tray 20, preventing heat transfer from the mixing chamber 2 to the liquid-collecting tray 20.

[0110] Of course, in other embodiments, the lower surface of the flange 25 may also be in contact with the liquid tray 20, with no tiny gap between them, and the lower part of the cavity is completely sealed by the liquid tray 20.

[0111] like Figure 8 As shown, corresponding to the cavity formed by the flange 25 and the liquid tray 20, the outer wall of the mixing chamber 5 also slopes outward in the vertically upward direction, so that the outer wall of the mixing chamber 2, the flange 25, and the liquid tray 20 form a triangular cavity, which is larger at the bottom and smaller at the top. At the same time, the inner wall of the mixing chamber 5 is vertically arranged in the vertically upward direction to facilitate the positioning and installation of the flame cap 1 relative to the mixing chamber 2.

[0112] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A burner comprising a mixing chamber and a fire cap, the mixing chamber and the fire cap jointly enclosing a mixing cavity of the burner, the fire cap being provided with a fire transmission structure, the mixing chamber being provided with at least two secondary air channels, characterized in that, Along the axial direction of the burner, the projection of the ignition structure onto the mixing chamber is located within the range of the mixing chamber and between the two secondary air channels, with the inlet of the mixing chamber located below the ignition structure; The burner also includes a shielding structure disposed within the mixing chamber, the shielding structure being located between the inlet of the mixing chamber and the ignition transmission structure.

2. The burner of claim 1, wherein The ignition transmission structure includes: A flame transmission channel is located on the burner cap, and the flame transmission channel penetrates the burner cap radially along the burner. A fire transmission hole is located within the fire transmission channel, and the fire transmission hole is internally connected to the gas mixing chamber. The projection of the fire transmission channel is located within the range of the shielding structure.

3. The burner of claim 2, wherein The number of the fire transmission holes is at least three; Wherein, at least one of the fire transmission holes is located inside the fire transmission channel, and the fire transmission hole is inclined inward. And / or, at least one of the fire-transfer holes is located on the middle side of the fire-transfer channel, and the fire-transfer hole is arranged facing upwards; And / or, at least two of the fire-transfer holes are located outside the fire-transfer channel, and the fire-transfer holes are inclined outward, wherein two of the fire-transfer holes are symmetrically arranged within the fire-transfer channel.

4. The burner of claim 3, wherein The inclination angle of the ignition hole located inside the ignition channel toward the center of the burner is between 25° and 65°. And / or, the projection of the fire-transfer hole located inside the fire-transfer channel within the fire-transfer channel is entirely within the range of the upper surface of the fire-transfer channel.

5. The burner of claim 2, wherein Along the circumference of the burner, the top center of the shielding structure is higher than the top two sides.

6. The burner of claim 5, wherein Define the width W at the top center of the shielding structure, the diameter of the fire transmission hole as d, and the value of the width W is between 2d and 3d. And / or, the distance between the top center of the shielding structure and the fire-transmitting hole located above it is between 2 and 5 mm.

7. The burner of claim 1, wherein The mixing chamber is provided with a secondary air channel. The total area of ​​the inlet of the secondary air channel is S1, and the total area of ​​the inlet of the mixing chamber is S2, where S2≥2S1.

8. The burner of claim 7, wherein The secondary air passage extends horizontally through the lower part of the mixing chamber. And / or, S2≥2.8S1.

9. Burner according to any of claims 1-8, characterized in that The number of shielding structures is multiple, and they are distributed in the mixing chamber along the circumference of the burner. At least one of the shielding structures is provided corresponding to the ignition structure, and the remaining shielding structures are provided corresponding to each support leg of the pot support. And / or, the inlet of the mixing chamber is located at the bottom of the mixing chamber; And / or, the shielding structure is integrally formed on the mixing chamber or the flame cap; And / or, along the radial direction of the burner, the shielding structure is continuously disposed between the outer and inner sidewalls of the mixing chamber.

10. A gas hob, characterized in that It includes the burner as described in any one of claims 1-9.

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