Combustor structure and hob combustor

Abstract

The application discloses a burner structure and a stove burner. The burner structure comprises an inner ring fire cover, a thermocouple and a blockage prevention cap edge. The blockage prevention cap edge is arranged on the inner ring fire cover and is located above the thermocouple. The inner ring fire cover is provided with a main fire hole and a fire maintaining hole. The diameter of the fire maintaining hole is D1, the diameter of the main fire hole is D2, D2>D1, the horizontal plane where the main fire hole is located is below the horizontal plane where the end of the thermocouple is located, the horizontal distance between the axis of the thermocouple and the wall surface where the gas outlets of the plurality of main fire holes are located is L, the radius of the blockage prevention cap edge is R1, the horizontal distance between the gas inlet of the main fire hole and the gas outlet of the main fire hole is R3, the diameter of the thermocouple is d1, and d1 / 2≤L≤R1-R3. By correspondingly arranging the position relationship of the main fire hole on the inner ring fire cover, the position relationship between the main fire hole and the thermocouple, and the size of the hole diameter of the main fire hole and the fire maintaining hole, the main fire hole can have the function of fire maintaining, and the defect that the fire maintaining performance cannot be improved well in the prior art is overcome.

Description

Technical Field

[0001] This invention relates to a burner structure and a stove burner. Background Technology

[0002] In daily use, most gas stoves use thermocouple-type flameout protection devices. This device usually has several small holes designed on the inner ring burner head, directly opposite the thermocouple sensing head, as flame-keeping holes. The diameter of the flame-keeping holes of the positive needle thermocouple is usually designed to be relatively small. After a period of use, the flame-keeping holes are easily blocked by oil or spills, which can lead to flameout when the user releases the handle, or flame separation when the flame-keeping holes are blocked, causing the flame to not reach the thermocouple head and thus failing to maintain the flame.

[0003] Currently, to address the issue of flame retention holes being easily clogged by oil, leading to a decrease in flame retention performance, a common method is to design an anti-clogging cap above the flame retention holes. However, if the cap diameter is too small, the anti-overflow effect is poor; if the cap diameter is too large, the flame hole may burn to the cap, resulting in excessive smoke or discoloration of the flame cap; if the anti-clogging cap is raised, problems such as the bottom of the pot hitting the inner ring flame cap may occur. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art in that it cannot effectively improve the fire retention performance, and to provide a burner structure and stove burner.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A burner structure includes an inner ring burner cap, a thermocouple, and an anti-clogging cap. The anti-clogging cap is disposed on the inner ring burner cap and is located above the thermocouple. The inner ring burner cap has a main burner hole and a flame-preserving hole. The diameter of the flame-preserving hole is D1, and the diameter of the main burner hole is D2, where D2 > D1. The horizontal plane where the main burner hole is located is below the horizontal plane where the end of the thermocouple is located. The horizontal distance between the axis of the thermocouple and the wall surface where the outlets of the multiple main burner holes are located is L. The radius of the anti-clogging cap is R1, and the horizontal distance between the inlet and outlet of the main burner hole is R3. The diameter of the thermocouple is d1, where d1 / 2 ≤ L ≤ R1 - R3.

[0007] In this solution, by setting the corresponding positional relationship of the main flame hole on the inner ring flame cap, as well as the positional relationship between the main flame hole and the thermocouple, and the size of the main flame hole and the flame-preserving hole, the main flame hole can be equipped with a flame-preserving function. At the same time, the main flame hole, as the largest diameter flame hole on the inner ring flame cap, participates in flame preservation. Only when the main flame hole is almost completely blocked will the flame not be preserved, thereby improving the anti-blocking performance and flame-preserving performance of the flame cap. The thermocouple is kept at a distance L from the main flame hole, so that the temperature of the thermocouple head does not exceed 650℃, which is within the normal operating temperature range of the thermocouple, avoiding affecting the service life of the thermocouple and preventing the thermocouple from burning out. Ultimately, this overcomes the defect of existing technologies that cannot effectively improve flame-preserving performance.

[0008] Preferably, there are two main ignition holes, which are spaced apart on both sides of the thermocouple, and the included angle between the axes of the two main ignition holes is α, where 15°≤α≤20°.

[0009] In this design, the two main flame holes involved in flame preservation are designed to be distributed on the left and right sides of the thermocouple sensing head, and are not directly opposite each other, but are staggered at a certain angle. This allows some of the flame to reach the thermocouple, preventing the thermocouple head from overheating and thus improving the service life of the thermocouple.

[0010] Preferably, the angle between the axis of any one of the main firing holes and the horizontal plane is... The angle between the line connecting any one of the main fire holes and the edge of the anti-clogging cap and the horizontal plane is β.

[0011] In this design, this angle setting ensures that the longitudinal line of the upper edge of the diameter of any main fire hole does not interfere with the cap edge of the inner ring fire cover, thereby improving fire retention performance.

[0012] Better place,

[0013] In this design, this feature improves fire resistance.

[0014] Preferably, the diameter of both main fire holes is D2, and D2 varies non-linearly in proportion to α.

[0015] In this scheme, D2 is proportional to α. When D2 is relatively small, the included angle α should also decrease accordingly. Otherwise, the main burner hole will not be able to burn the thermocouple or the electromotive force supplied to the thermocouple will be insufficient.

[0016] Preferably, point A is the intersection of the axis of the thermocouple and the axes of the two adjacent main firing holes, point B is the end of the thermocouple, and the distance between point B and point A in the height direction is h, where 1 / 3*D2≤h≤1 / 2*D2.

[0017] In this scheme, the diameter of the main flame hole and the position of the thermocouple are set to improve the flame preservation performance and avoid excessive temperature of the thermocouple head, thereby further improving the flame preservation efficiency of the thermocouple.

[0018] Preferably, a plurality of the flame-preserving holes extend horizontally from the outer wall surface of the inner ring flame cap to the inner wall surface of the inner ring flame cap.

[0019] In this design, the flame-protection hole extends through the inner ring flame cap, allowing the flame to flow freely to the thermocouple.

[0020] Preferably, a plurality of the flame-keeping holes extend inward and upward from the outer wall surface of the inner ring flame cap to the inner wall surface of the inner ring flame cap.

[0021] In this design, the flame-holding hole extends through the inner ring flame cap and extends inward and upward from the outer wall of the inner ring flame cap to the inner wall of the inner ring flame cap. This prevents oil or liquid from entering the flame-holding hole under the influence of gravity, ensuring that the flame-holding hole is not blocked. This improves the problem of insufficient electromotive force margin when the main flame hole and the main flame hole experience flame lift-off due to blockage of the flame-holding hole.

[0022] Preferably, the burner structure further includes a plurality of flame stabilizing holes and a flame stabilizing ring slit, the flame stabilizing holes being spaced apart on the inner ring burner cap, and the lower end of the inner ring burner cap being circumferentially provided with a flame stabilizing ring slit, the main burner hole and the flame-keeping hole being located above the flame stabilizing ring slit.

[0023] In this scheme, several flame stabilizing holes, together with the lower row of flame stabilizing seams, play a role in stabilizing the flame of the upper row of main flame holes, preventing the main flame holes from leaving the flame. At the same time, the main function of the holes in generating electromotive force at the thermocouple head is to increase the electromotive force margin.

[0024] A stove burner, the stove burner comprising the burner structure described above.

[0025] In this solution, the stove burner with a burner structure is configured by correspondingly setting the position of the main flame hole on the inner ring burner cap, as well as the positional relationship between the main flame hole and the thermocouple, and setting the aperture size of the main flame hole and the flame-keeping hole. This enables the main flame hole to have a flame-keeping function. At the same time, the main flame hole, as the largest diameter flame hole on the inner ring burner cap, participates in flame-keeping. Only when the main flame hole is almost completely blocked will the flame not be able to be kept, thereby improving the anti-blocking performance and flame-keeping performance of the burner cap. The thermocouple is kept at a distance L from the main flame hole, so that the temperature of the thermocouple head does not exceed 650℃, which is within the normal operating temperature range of the thermocouple, avoiding affecting the service life of the thermocouple and preventing the thermocouple from burning out. Ultimately, this overcomes the defect of existing technologies that cannot effectively improve flame-keeping performance.

[0026] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0027] The positive and progressive effects of this invention are as follows: By setting the corresponding positional relationship of the main flame hole on the inner ring flame cap, as well as the positional relationship between the main flame hole and the thermocouple, and the setting of the aperture sizes of the main flame hole and the flame-preserving hole, the main flame hole can thus have a flame-preserving function. At the same time, the main flame hole, as the largest diameter flame hole on the inner ring flame cap, participates in flame preservation. Only when the main flame hole is almost completely blocked will the flame not be preserved, thereby improving the anti-blocking performance and flame-preserving performance of the flame cap. The thermocouple and the main flame hole are kept at a distance of L, so that the temperature of the thermocouple head does not exceed 650°C, thus reaching the normal operating temperature range of the thermocouple, avoiding affecting the service life of the thermocouple, preventing the thermocouple from burning out, and ultimately overcoming the defect of the prior art that cannot effectively improve the flame-preserving performance. Attached Figure Description

[0028] Figure 1 This is a partial schematic diagram of the stove burner in Embodiments 1 and 2 of the present invention.

[0029] Figure 2 This is a schematic diagram of the ignition hole and the flame-preserving hole in Embodiment 1 of the present invention.

[0030] Figure 3 This is a schematic diagram of the ignition hole and the flame-preserving hole in Embodiment 2 of the present invention.

[0031] Figure 4 This is a diagram showing the connection relationship between the ignition hole and the anti-clogging cap edge in Embodiments 1 and 2 of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] Inner ring fire cap 1

[0034] Thermocouple 2

[0035] Anti-blocking cap brim 3

[0036] Main fire port 4

[0037] Fireproof hole 5

[0038] Flame Stabilizer Hole 6

[0039] Flame Stabilizing Circumferential Seam 7

[0040] Stove burner 8 Detailed Implementation

[0041] The present invention will be described more clearly and completely below by way of embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments described herein.

[0042] Example 1

[0043] like Figure 1 As shown, Embodiment 1 of the present invention discloses a stove burner 8, including a burner structure. The burner structure includes an inner ring burner cap 1, a thermocouple 2, and an anti-clogging cap. The anti-clogging cap is disposed on the inner ring burner cap 1 and is located above the thermocouple 2. The inner ring burner cap 1 is provided with a main flame hole 4 and a flame-keeping hole 5. The diameter of the flame-keeping hole 5 is D1, and the diameter of the main flame hole 4 is D2, where D2 > D1. The horizontal plane where the main flame hole 4 is located is located below the horizontal plane where the end of the thermocouple 2 is located. The horizontal distance between the axis of the thermocouple 2 and the wall surface where the gas outlets of the multiple main flame holes 4 are located is L. The radius of the anti-clogging cap 3 is R1, and the horizontal distance between the gas inlet and the gas outlet of the main flame hole 4 is R3. The diameter of the thermocouple 2 is d1, where d1 / 2 ≤ L ≤ R1 - R3.

[0044] Specifically, the horizontal distance from the axis of thermocouple 2 to the center of the inner ring cap 1 is R2.

[0045] Most existing stove burners use thermocouple 2-type flameout protection devices. Typically, several small holes are designed on the inner ring burner cap 1, directly opposite the temperature-sensing head of the thermocouple 2, as flame-keeping holes 5. To simultaneously ensure the thermoelectric potential generated by the temperature-sensing head of the thermocouple 2 maintains the electromotive force required for the solenoid valve to engage, and the temperature of the thermocouple 2 head cannot exceed 650℃, meeting the temperature resistance requirements of the thermocouple 2 end material, the diameter of the flame-keeping holes 5 directly opposite the thermocouple 2 is usually designed to be relatively small. After a period of use, the flame-keeping holes 5 are easily blocked by oil or spilled liquids, leading to flameout when the user releases the flame, or flame detachment when the flame-stabilizing holes are blocked, preventing the flame from reaching the thermocouple 2 head, resulting in flameout when the user releases the flame, thus affecting the user experience. A common method to address the issue of oil clogging in the burner cap holes is to design an anti-clogging cap 3 above the flame-keeping holes 5. To address the issue of easy clogging of the flame retaining hole 5, a cap-shaped structure was designed above the flame holes of the inner ring burner cap 1. However, the diameter of the anti-clogging cap 3 is too small, resulting in poor spill prevention. If the diameter of the anti-clogging cap 3 is too large, the flame holes may burn onto the anti-clogging cap 3, leading to excessive smoke or discoloration of the inner ring burner cap 1. Increasing the height of the anti-clogging cap 3 would cause the bottom of the pot to touch the inner ring burner cap 1. Furthermore, the current flame retaining hole 5 has a relatively small diameter and is usually horizontal or tilted upwards. When there is spillage or oil, under the influence of gravity, the spillage or oil easily flows from the outside (higher position) of the flame outlet hole of the inner ring burner cap 1 to the inside (lower position), thus easily becoming clogged.

[0046] like Figure 1 and Figure 2As shown, by setting the corresponding positional relationship of the main flame hole 4 on the inner ring burner cap 1, the positional relationship between the main flame hole 4 and the thermocouple 2, and the aperture size of the main flame hole 4 and the flame-holding hole 5, the main flame hole 4 can thus have a flame-holding function. Simultaneously, the main flame hole 4, as the largest diameter flame hole on the inner ring burner cap 1, participates in flame-holding. Only when the main flame hole 4 is almost completely blocked will the flame fail to hold, thereby improving the anti-blocking performance and flame-holding performance of the inner ring burner cap 1. The thermocouple 2 maintains a distance L from the main flame hole 4, ensuring that the heat... The temperature of the thermocouple 2 head does not exceed 650℃, which is within the normal operating temperature range of the thermocouple 2, avoiding affecting the service life of the thermocouple 2 and preventing the thermocouple 2 from burning out. The highest point of the thermocouple 2 end is slightly higher than the central axis of the two main flame holes 4 involved in flame preservation. Even when the flame stabilizing orifice is blocked and the flame of the main flame hole 4 shows flame detachment, the flame can still reach the temperature sensing head of the thermocouple 2. That is, even when the flame stabilizing orifice is completely blocked, the flame can still be preserved, thus overcoming the defect of the existing technology that cannot effectively improve the flame preservation performance.

[0047] like Figure 4 As shown, there are two main flame holes 4, which are spaced apart on both sides of the thermocouple 2, with an angle α between their axes, where 15°≤α≤20°. The two main flame holes 4 involved in flame preservation are designed to be distributed on the left and right sides of the sensing head of the thermocouple 2, but not directly opposite each other; rather, they are staggered at a certain angle. This allows part of the flame to reach the thermocouple 2, preventing the temperature at the thermocouple 2's end from becoming too high, thus improving the thermocouple 2's service life. If α is too large, the heating temperature of the thermocouple 2's end from the two main flame holes 4 will be too low. When the two main flame holes 4 are used for flame preservation, the electromotive force will be below 3.5mV, which is below the minimum electromotive force required to maintain the solenoid valve's engagement.

[0048] The angle between the axis of any main fire hole 4 and the horizontal plane is . The angle between the line connecting any main fire port 4 and the anti-blocking cap edge 3 and the horizontal plane is β. This angle setting ensures that the longitudinal line of the upper edge of the diameter of any main flame hole 4 does not interfere with the edge of the inner ring flame cap 1, thereby improving the flame retention performance.

[0049] This setting improves fire resistance.

[0050] Both main burner holes 4 have a diameter of D2, which changes non-linearly in proportion to α. Since D2 is proportional to α, the included angle α must decrease when D2 is relatively small; otherwise, the main burner holes 4 will not be able to heat the thermocouple 2 or will provide insufficient electromotive force to it. The main burner hole 4 deviating to the left of the thermocouple 2 has an angle of α / 2, and the main burner hole 4 deviating to the right has an angle of α / 2.

[0051] Several flame-holding holes 5 extend horizontally from the outer wall of the inner ring flame cap 1 to the inner wall of the inner ring flame cap 1. The flame-holding holes 5 penetrate the inner ring flame cap 1, allowing the flame to flow smoothly to the thermocouple 2. Between the mid-angle of the two main flame holes 4 that participate in flame holding, a horizontal flame-holding hole 5 with a diameter of D1 is designed at the same height position of the lower row of flame-stabilizing holes 6.

[0052] Specifically, the burner structure relies on the combined action of the flames from two main flame holes 4 and three flame-holding holes 5. The largest diameter flame hole on the inner ring burner cap 1 is the main flame hole 4, which participates in flame holding. Only when the main flame hole 4 is almost completely blocked will the flame not be held, thus improving the anti-blocking performance and thereby improving the flame holding performance. In more severe situations, such as when the flames of the two main flame holes 4 partially detach, since the detached flame is obliquely upward along the gas outlet direction, the flames of the two main flame holes 4 can still reach the head of the thermocouple 2 when the flame detaches, thus improving the flame holding performance in the case of flame detachment.

[0053] like Figure 2 As shown, point A is the intersection of the axis of thermocouple 2 and the axes of the two adjacent main flame holes 4, and point B is the end of thermocouple 2. The distance between point B and point A in the height direction is h, where 1 / 3*D2≤h≤1 / 2*D2. Setting the relationship between the diameter of the main flame hole 4 and the position of the thermocouple improves flame retention performance and avoids excessively high temperatures on the head of thermocouple 2, further enhancing its flame retention efficiency. Point B is higher than point A. When the flame retention hole 5 is blocked, the electromotive force generated at the head of thermocouple 2, relying on the flame temperature of the two main flame holes 4, can still maintain the solenoid valve's engagement, thus preserving the flame. The maximum horizontal distance L between the axis of thermocouple 2 and the wall surface where the outlets of the multiple main flame holes 4 are located ensures that point B of thermocouple 2 is below the anti-blocking cap 3 of the inner ring flame cap 1; otherwise, it may be dripped by overflowing liquid, leading to flameout.

[0054] like Figure 1 As shown, the burner structure also includes several flame stabilizing holes 6 and flame stabilizing ring seams 7. The flame stabilizing holes 6 are spaced apart on the inner ring burner cap 1, and the lower end of the inner ring burner cap 1 is circumferentially surrounded by flame stabilizing ring seams 7. The main burner holes 4 and the flame-holding holes 5 are both located above the flame stabilizing ring seams 7. The several flame stabilizing holes 6, together with the lower row of flame stabilizing ring seams 7, stabilize the flame of the upper row of main burner holes 4, preventing the main burner holes 4 from leaving the flame. At the same time, the electromotive force generated by this hole at the end B of the thermocouple mainly increases the electromotive force margin. The flame-holding holes 5, together with the lower row of flame stabilizing ring seams 7, stabilize the flame of the upper row of main burner holes 4, preventing the main burner holes 4 from leaving the flame.

[0055] In a preferred embodiment, the flame stabilizing structure of the inner ring burner cap 1 includes a lower row of flame stabilizing holes 6, a flame stabilizing ring seam 7, and an upper row of flame stabilizing holes 6 below the anti-clogging cap 3, which improves the flame stabilizing performance and improves the problem of flame not being able to be kept alive due to flame separation; the anti-clogging cap 3 structure of the inner ring burner cap 1 plays a certain role in blocking oil and spills, which can reduce the probability of the flame keeping holes 5 being blocked.

[0056] Example 2

[0057] The parts that are the same as those in Example 1 in Example 2 will not be repeated; only the differences will be explained.

[0058] like Figure 3 As shown, several flame-holding holes 5 extend inward and upward from the outer wall of the inner ring flame cap 1 to the inner wall of the inner ring flame cap 1. The flame-holding holes 5 penetrate the inner ring flame cap 1 and extend inward and upward from the outer wall of the inner ring flame cap 1 to the inner wall of the inner ring flame cap 1. This ensures that when there is oil or spillage, the oil or spillage will not enter the flame-holding holes 5 under the action of gravity, thus ensuring that the flame-holding holes 5 will not be blocked. This improves the problem of insufficient electromotive force margin when the main flame hole 4 and the main flame hole 4 experience flame lift-off due to the blockage of the flame-holding holes 5.

[0059] In a preferred embodiment, in Example 2, the outlet angle of the flame-holding hole 5 with a diameter of D1 is inclined downward from the inside out. When there is oil or overflow, under the action of gravity, the oil or overflow will not enter the flame hole, ensuring that the flame-holding hole 5 will not be blocked, thereby improving the problem of flame failure caused by the flame-holding hole 5 being blocked. The flame-holding hole 5 also plays the role of stabilizing the flame of the upper main flame hole 4 and keeping the flame of the thermocouple 2. The main function of the electromotive force generated by the flame-holding hole 5 on the thermocouple 2 is to increase the electromotive force margin, and at the same time improve the situation of the flame-holding hole 5 being blocked due to flame separation.

[0060] Specifically, the intersection of the axis of the extension direction of the fire-preserving hole 5 and the axis of the thermocouple 2 is point C, and the distance between point B and point C is H, where H < 5 mm.

[0061] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention 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 the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A burner structure, characterized in that, The burner structure includes an inner ring burner cap, a thermocouple, and an anti-clogging cap. The anti-clogging cap is disposed on the inner ring burner cap and is located above the thermocouple. The inner ring burner cap has a main burner hole and a flame-preserving hole. The diameter of the flame-preserving hole is D1, and the diameter of the main burner hole is D2, where D2 > D1. The horizontal plane where the main burner hole is located is located below the horizontal plane where the end of the thermocouple is located. The horizontal distance between the axis of the thermocouple and the wall surface where the outlets of the multiple main burner holes are located is L. The radius of the anti-clogging cap is R1, and the horizontal distance between the inlet and outlet of the main burner hole is R3. The diameter of the thermocouple is d1, where d1 / 2 ≤ L ≤ R1 - R3. The number of main ignition holes is two, and the two main ignition holes are distributed at intervals on both sides of the thermocouple, and the included angle between the axes of the two main ignition holes is α, 15°≤α≤20°; Point A is the intersection of the axis of the thermocouple and the axes of the two adjacent main fire holes. Point B is the end of the thermocouple. The distance between point B and point A in the height direction is h, where 1 / 3*D2≤h≤1 / 2*D2.

2. The burner structure as described in claim 1, characterized in that, The angle between the axis of any one of the main fire holes and the horizontal plane is . The angle between the line connecting any one of the main fire holes and the edge of the anti-clogging cap and the horizontal plane is β.

3. The burner structure as described in claim 2, characterized in that, 4. The burner structure as described in claim 1, characterized in that, The diameter of both main fire holes is D2, and D2 changes nonlinearly in proportion to α.

5. The burner structure as described in claim 1, characterized in that, The flame-keeping hole extends horizontally from the outer wall surface of the inner ring flame cap to the inner wall surface of the inner ring flame cap.

6. The burner structure as described in claim 1, characterized in that, The flame-keeping hole extends inward and upward from the outer wall surface of the inner ring flame cap to the inner wall surface of the inner ring flame cap.

7. The burner structure as described in claim 1, characterized in that, The burner structure also includes several flame stabilizing holes and flame stabilizing ring seams. The flame stabilizing holes are spaced apart on the inner ring burner cap, and the lower end of the inner ring burner cap is circumferentially provided with a flame stabilizing ring seam. The main burner hole and the flame preservation hole are both located above the flame stabilizing ring seam.

8. A stove burner, characterized in that, The stove burner includes the burner structure as described in any one of claims 1-7.

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