Inner ring fire cover and stove burner comprising same

Abstract

The inner ring fire cover comprises a lower cover body and an upper cover body which can be mutually spliced in a separable mode in the height direction, and is characterized in that a plurality of upper grooves which are opened downwards are formed in the lower portion of the lower cover body, a plurality of lower grooves which are opened upwards are formed in the upper portion of the lower cover body, and the upper cover body and the lower cover body are connected in a detachable mode. The upper groove and the upper surface of the lower cover body are spliced to form an upper fire hole, the lower groove and the upper surface of the upper cover body are spliced to form a lower fire hole, the upper fire hole and the lower fire hole are respectively arranged in the circumferential direction of the inner ring fire cover and are mutually staggered, and the sectional area of the upper fire hole is larger than that of the lower fire hole. The lower fire holes can play a good flame stabilizing role on the upper fire holes. And meanwhile, the upper fire holes with higher fire hole strength are closer to the top of the pot bracket, so that the heat efficiency is higher. And the upper burner cap and the lower burner cap can still be conveniently cleaned after being separated.

Description

TECHNICAL FIELD

[0001] The utility model relates to an inner ring fire cover and a stove burner comprising the same. BACKGROUND

[0002] Some existing inner ring fire covers adopt a split groove type structure. The original closed round fire hole is changed into an open groove. The open groove is convenient to clean, and the cleaning time is greatly reduced. In addition, after being washed in water, the water droplets have small adhesion, so that it is not easy to have water droplets adhering to the inside of the fire hole after cleaning, causing the fire to not light.

[0003] At present, the open groove design is distributed on the same side of the sealing surface, and the flame stability is poor. Flame separation problem is prone to occur. In high pressure or flame separation limit gas, even the fire cannot be lit normally. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the defects of poor flame stability, easy flame separation problem, and even fire not lighting in the prior art.

[0005] The utility model solves the above technical problems by the following technical scheme:

[0006] An inner ring fire cover comprises a lower cover body and an upper cover body which are separable and spliced along the height direction. A plurality of upper grooves are formed on the lower cover body and open downward. A plurality of lower grooves are formed on the upper cover body and open upward. The upper grooves and the upper surface of the lower cover body are combined to form upper fire holes. The lower grooves and the upper surface of the upper cover body are combined to form lower fire holes. The upper fire holes and the lower fire holes are arranged around the circumference of the inner ring fire cover and are staggered with each other. The cross-sectional area of the upper fire holes is greater than that of the lower fire holes.

[0007] In the scheme, the upper fire holes and the lower fire holes with different heights are designed on the two sides of the mating sealing surfaces of the upper cover body and the lower cover body. Due to the different cross-sectional areas, the gas flow rate and intensity of the lower fire holes in the lower row are less than those of the upper fire holes in the upper row. Therefore, the lower fire holes can play a good flame stabilizing effect on the upper fire holes. At the same time, the upper fire holes with greater intensity are closer to the top of the pot support, and the thermal efficiency is higher. In addition, the upper fire cover and the lower fire cover can still be easily cleaned after being separated.

[0008] Preferably, the cross-sectional shape of the upper fire hole is a trapezoidal shape with a large lower part and a small upper part, and / or the cross-sectional shape of the lower fire hole is a trapezoidal shape with a large upper part and a small lower part. By reasonably designing the trapezoidal cross-sectional shape of the upper fire hole and the lower fire hole, the area of the side wall of the upper fire hole and the lower fire hole is increased, thereby increasing the along-the-way resistance of the upper fire hole and the lower fire hole, reducing the flow process of the gas to the outlet of the upper fire hole and the lower fire hole, and further improving the flame stability.

[0009] Preferably, one or more upper fire holes are arranged between at least one pair of adjacent lower fire holes in the circumferential direction of the inner ring fire cover; and / or one or more lower fire holes are arranged between at least one pair of adjacent upper fire holes in the circumferential direction of the inner ring fire cover.

[0010] Preferably, the inner ring fire cover has a temperature measuring area close to a thermocouple, and a plurality of upper fire holes are arranged between a pair of adjacent lower fire holes in the temperature measuring area in the circumferential direction of the inner ring fire cover. In this way, the lower fire holes in the temperature measuring area have a relatively longer spacing area, so that the thermocouple close to the area has a certain distance from the adjacent lower fire holes, thereby reducing the heat on the thermocouple and avoiding generating an excessively high electromotive force.

[0011] Preferably, a fire retaining hole is arranged between at least one pair of adjacent upper fire holes in the temperature measuring area in the circumferential direction of the inner ring fire cover, the number of fire retaining holes between the same pair of adjacent upper fire holes is one or more, and at least a part of the fire retaining hole overlaps the adjacent upper fire hole in the height direction. In this way, more fire retaining holes can be arranged to achieve better fire retaining effect.

[0012] Preferably, the height of at least one upper fire hole in the temperature measuring area is lower than the height of the upper fire hole outside the temperature measuring area. The upper fire hole with reduced height can make the flame closer to the lower thermocouple, and the smaller cross-sectional area is more conducive to the stability of the flame.

[0013] Preferably, the inner ring fire cover has an ignition area close to an ignition needle, the ignition area is adjacent to the temperature measuring area, and the upper cover body is provided with a radial integrated brim covering the ignition area and the temperature measuring area in the circumferential direction of the inner ring fire cover. The integrated brim can block overflow to avoid extinguishing the flame, and at the same time, the integrated brim has high strength and better structural strength.

[0014] Preferably, the inner ring fire cover has a transfer area for transferring fire, and a transfer hole is arranged between at least one pair of adjacent upper fire holes in the transfer area in the circumferential direction of the inner ring fire cover, and the number of transfer holes between the same pair of adjacent upper fire holes is one or more. More number of transfer holes can more stably transfer gas to the outer ring fire cover.

[0015] Preferably, the upper cover body is provided with a flame stabilizing hole arranged along the circumference of the inner ring fire cover, and the height of the flame stabilizing hole is at least a part higher than that of the adjacent upper fire hole. In this way, the upper fire hole has upper and lower double flame stabilization, further improving the flame stabilization effect.

[0016] A cooking appliance burner comprising the inner ring fire cover.

[0017] The utility model discloses a positive progress effect in at: the utility model discloses the lower fire hole can play good flame stabilizing effect to upper fire hole. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure schematic drawing of the stove burner of the preferred embodiment of the utility model.

[0019] Figure 2 It is the explosion structure schematic drawing of the inner ring fire cover of the preferred embodiment of the utility model.

[0020] Figure 3 It is the three -dimensional structure schematic drawing of the inner ring fire cover of the preferred embodiment of the utility model.

[0021] Figure 4 It is the three -dimensional structure schematic drawing of the temperature measuring area visual angle direction of the inner ring fire cover of the preferred embodiment of the utility model.

[0022] Figure 5 It is the main view schematic drawing of the inner ring fire cover of the preferred embodiment of the utility model.

[0023] Figure 6 It is the three -dimensional structure schematic drawing of the transmission fire area visual angle direction of the inner ring fire cover of the preferred embodiment of the utility model.

[0024] Figure 7 It is the side view schematic drawing of the inner ring fire cover of the preferred embodiment of the utility model.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] Inner ring fire cover 100

[0027] Upper cover body 101

[0028] Lower cover body 102

[0029] Upper fire hole 110

[0030] Upper groove 111

[0031] Lower fire hole 120

[0032] Lower groove 121

[0033] Fire hole 130

[0034] Ignition hole 140

[0035] Transmission fire hole 150

[0036] Flame stabilizing hole 160

[0037] One-piece brim 170

[0038] Outer ring fire cover 200

[0039] Ignition channel 210

[0040] Thermocouple 300

[0041] Ignition pin 400 DETAILED DESCRIPTION

[0042] The utility model will be further illustrated by way of examples below, but the utility model is not limited to the scope of the examples described.

[0043] As Figures 1-7 shown, the preferred embodiment of the utility model discloses an inner ring fire cover 100, as Figure 1 and Figure 2 shown, the embodiment includes the lower cover body 102 and the upper cover body 101 that can be separated and spliced with each other along the height direction, the lower cover body 102 is opened downward to a plurality of upper grooves 111, and the upper cover body 101 is opened upward to a plurality of lower grooves 121, the upper groove 111 and the upper surface of the lower cover body 102 are spliced to form the upper fire hole 110, and the lower groove 121 and the upper surface of the upper cover body 101 are spliced to form the lower fire hole 120, wherein the upper fire hole 110 and the lower fire hole 120 are arranged around the circumference of the inner ring fire cover 100 and staggered with each other, and the cross-sectional area of the upper fire hole 110 is greater than that of the lower fire hole 120.

[0044] The lower surface of the upper cover body 101 and the upper surface of the lower cover body 102 in the embodiment form a sealing surface after splicing, so that the upper fire hole 110 and the lower fire hole 120 form a channel.The lower surface of the upper cover body 101 and the surface of the lower cover body 102 are discontinuous conical surface shapes, so that the movement of the upper cover body 101 and the lower cover body 102 in the radial direction can be limited.

[0045] In the embodiment, the upper fire hole 110 and the lower fire hole 120 with different heights are designed on the two sides of the mating sealing surface of the upper cover body 101 and the lower cover body 102. Due to the different cross-sectional areas, the gas flow rate and intensity of the lower fire hole 120 in the lower row are less than those of the upper fire hole 110 in the upper row, so that the lower fire hole 120 can play a good flame stabilizing effect on the upper fire hole 110. At the same time, the upper fire hole 110 with greater fire hole intensity is closer to the top of the pot support, and the thermal efficiency is higher. And the upper fire cover and the lower fire cover can still be cleaned after being separated.

[0046] As Figure 1 and Figure 2As shown, the cross-sectional shape of the upper burner hole 110 is a trapezoid with a larger bottom and a smaller top, and the cross-sectional shape of the lower burner hole 120 is also a trapezoid with a larger top and a smaller bottom. Given the limited inner and outer diameters of the inner ring burner cap 100, the depth and cross-sectional area of ​​the upper burner hole 110 and the lower burner hole 120 are difficult to change. By altering the cross-sectional shapes of the upper burner hole 110 and the lower burner hole 120, the friction loss along the burner hole is increased, reducing the gas flow velocity and thus improving flame stability. With equal cross-sectional areas (i.e., the same gas intensity), gas performance is unaffected; however, different cross-sectional shapes result in different resistance coefficients. For circular, square, rectangular, and trapezoidal holes with equal cross-sectional areas, the larger the sidewall area with a longer perimeter, the greater the friction loss coefficient, the greater the reduction in gas flow velocity, and thus the better the flame stability. Furthermore, a longer perimeter cross-section, due to its larger resistance coefficient, makes backfire less likely, thus resolving the issue of knocking when the burner is turned off. By rationally designing the trapezoidal cross-sectional shape of the upper ignition port 110 and the lower ignition port 120, the area of ​​the sidewalls of the upper ignition port 110 and the lower ignition port 120 is increased, thereby increasing the friction resistance of the upper ignition port 110 and the lower ignition port 120 and reducing the flow of gas to the outlet of the upper ignition port 110 and the lower ignition port 120, thereby further improving flame stability.

[0047] In this embodiment, the trapezoidal cross-section of the upper burner hole 110 is smaller at the top and larger at the bottom, while the trapezoidal cross-section of the lower burner hole 120 is larger at the top and smaller at the bottom. The larger openings of both are located at the open ends, which facilitates mold processing and demolding, improving the mold's service life. Besides facilitating demolding, this also brings the edges of adjacent upper burner holes 110 and lower burner holes 120 closer together, resulting in closer proximity of adjacent flames at the flame root, thus improving flame stability. The trapezoidal structure increases the distance between the ends of the upper burner holes 110 and lower burner holes 120 furthest from the sealing surface, allowing for more complete air filling at the larger distance end and more complete combustion of the fuel gas, thereby improving energy efficiency. In other embodiments, the upper burner hole 110 or lower burner hole 120 can also have other cross-sectional shapes.

[0048] like Figures 1-3 As shown, in a preferred embodiment, one or more upper ignition holes 110 are provided between at least one pair of adjacent lower ignition holes 120 in the circumferential direction around the inner ring ignition cap 100; and / or one or more lower ignition holes 120 are provided between at least one pair of adjacent upper ignition holes 110.

[0049] like Figures 3-5As shown, in a preferred embodiment, the inner ring flame cap 100 has a temperature measuring area close to the thermocouple 300. A plurality of upper flame holes 110 are arranged between a pair of adjacent lower flame holes 120 located in the temperature measuring area along the circumference of the inner ring flame cap 100. This results in a relatively longer interval between the lower flame holes 120 in the temperature measuring area, thus maintaining a certain distance between the thermocouple 300 near this location and the lower flame holes 120 on both sides, thereby reducing the heat applied to the thermocouple 300 and preventing the generation of excessively high electromotive force.

[0050] like Figures 3-5 As shown, in a preferred embodiment, flame-preserving holes 130 are provided between at least one pair of adjacent upper ignition holes 110 located in the temperature measuring area around the inner ring flame cap 100. The number of flame-preserving holes 130 located between the same pair of adjacent upper ignition holes 110 is one or more, and at least a portion of the flame-preserving holes 130 overlaps with the adjacent upper ignition holes 110 in the height direction. This allows for the provision of more flame-preserving holes 130 to achieve a better flame-preserving effect.

[0051] like Figures 3-5 As shown, in a further preferred embodiment, the height of at least one upper ignition hole 110 located in the temperature measuring area is lower than the height of upper ignition holes 110 located outside the temperature measuring area. Lowering the height of the upper ignition holes 110 allows the flame to be closer to the thermocouple 300 below, and the smaller cross-sectional area is more conducive to flame stability.

[0052] like Figures 3-5 As shown, in a preferred embodiment, the inner ring flame cap 100 has an ignition area close to the ignition needle 400, and the ignition area has ignition holes 140. The ignition area is adjacent to the temperature measuring area. The upper cover 101 is provided with an integral brim 170 extending radially, which covers both the ignition area and the temperature measuring area circumferentially around the inner ring flame cap 100. The integral brim 170 can block overflow to prevent the flame from being extinguished, and at the same time, the integral brim 170 has high strength and better structural strength.

[0053] like Figures 6-7 As shown, in a preferred embodiment, the inner ring burner cap 100 has a ignition zone for ignition transmission. Around the circumference of the inner ring burner cap 100, ignition holes 150 are provided between at least one pair of adjacent upper ignition holes 110 located within the ignition zone. The number of ignition holes 150 located between the same pair of adjacent upper ignition holes 110 can be one or more. A greater number of ignition holes 150 can more stably transmit the combustion gas to the outer ring burner cap 200. Combined with... Figure 1As can be seen, a flame transmission channel 210 is provided on the side of the inner ring burner cap 100 near the flame transmission area. The gas from the flame transmission holes 150 is ejected outward through the flame transmission channel 210 to achieve outer ring flame. More flame transmission holes 150 can more stably slow down the gas flow rate and transmit it to the outer ring.

[0054] like Figures 1-7 As shown, in a preferred embodiment, the upper cover 101 is provided with flame-stabilizing holes 160 arranged circumferentially along the inner ring flame cap 100, and at least a portion of the flame-stabilizing holes 160 are higher than the adjacent upper flame holes 110. This allows the upper flame holes 110 to have double flame stabilization, further improving the flame stabilization effect. In this embodiment, the flame-stabilizing holes 160 located in the temperature measurement area can also play a role in flame preservation, and the flame-stabilizing holes 160 located in the flame transmission area can also play a role in flame transmission.

[0055] The inner ring burner cap 100 of this embodiment can be applied to various stove burners. The lower burner hole 120 of this invention can effectively stabilize the flame of the upper burner hole 110. At the same time, the upper burner hole 110, with its stronger flame intensity, is closer to the top of the pot support, resulting in higher thermal efficiency. Furthermore, the upper and lower burner caps remain easy to clean even after separation.

[0056] 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. An inner ring flame cover, comprising a lower cover and an upper cover that are separable and connectable along the height direction, characterized in that, The lower cover has several downward-opening upper grooves at its bottom and several upward-opening lower grooves at its top. The upper grooves are joined with the upper surface of the lower cover to form upper flame holes, and the lower grooves are joined with the upper surface of the upper cover to form lower flame holes. The upper flame holes and the lower flame holes are arranged circumferentially around the inner ring flame cap and are staggered from each other. The cross-sectional area of ​​the upper flame holes is larger than that of the lower flame holes.

2. The inner ring flame cap as described in claim 1, characterized in that, The cross-sectional shape of the upper fire hole is a trapezoidal shape that is larger at the bottom and smaller at the top, and / or the cross-sectional shape of the lower fire hole is a trapezoidal shape that is larger at the top and smaller at the bottom.

3. The inner ring flame cap as described in claim 1, characterized in that, In the circumferential direction surrounding the inner ring flame cap, one or more upper flame holes are provided between at least one pair of adjacent lower flame holes; and / or one or more lower flame holes are provided between at least one pair of adjacent upper flame holes.

4. The inner ring flame cap as described in claim 1, characterized in that, The inner ring flame cap has a temperature measuring area similar to that of a thermocouple, wherein, around the circumference of the inner ring flame cap, a plurality of upper flame holes are provided between a pair of adjacent lower flame holes located in the temperature measuring area.

5. The inner ring flame cap as described in claim 4, characterized in that, Around the inner ring flame cap, a flame-keeping hole is provided between at least one pair of adjacent upper flame holes in the temperature measuring area. The number of flame-keeping holes between the same pair of adjacent upper flame holes is one or more, and at least a portion of the flame-keeping hole overlaps with the adjacent upper flame hole in the height direction.

6. The inner ring flame cap as described in claim 4, characterized in that, The height of at least one of the upper heating holes located in the temperature measuring area is lower than the height of the upper heating holes located outside the temperature measuring area.

7. The inner ring flame cap as described in claim 4, characterized in that, The inner ring flame cap has an ignition area close to the ignition needle, wherein the ignition area is adjacent to the temperature measuring area, and the upper cover is provided with an integral brim extending radially, the integral brim covering the ignition area and the temperature measuring area in the circumferential direction around the inner ring flame cap.

8. The inner ring flame cap as described in claim 1, characterized in that, The inner ring flame cap has a flame transmission area for flame transmission. In the circumferential direction of the inner ring flame cap, a flame transmission hole is provided between at least one pair of adjacent upper flame holes in the flame transmission area. The number of flame transmission holes located between the same pair of adjacent upper flame holes is one or more.

9. The inner ring flame cap as described in any one of claims 1-8, characterized in that, The upper cover is provided with flame stabilizing holes arranged circumferentially along the inner ring flame cap, and at least a portion of the flame stabilizing holes are higher than the adjacent upper flame holes.

10. A stove burner, characterized in that, The stove burner includes the inner ring burner cap as described in any one of claims 1-9.

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