Metal strip and honeycomb heating element

Abstract

This utility model discloses a metal strip and a honeycomb heating element. The metal strip is formed by winding a strip containing metal. The strip consists of at least one flat strip and one feature strip. A first separator and a second separator are respectively provided on the front and back surfaces of a first side. The first separator is connected to the first side to define a first flame distribution hole within a first flame hole, and the second separator is connected to the first side to define a second flame distribution hole within a second flame hole. This results in a higher porosity at the upper end of the honeycomb structure than at the lower end, reducing the resistance of the gas passing through the pores. Its structure is simple, easy to manufacture, has high porosity, is not prone to backfire, and effectively improves the thermal intensity of the flame holes.

Description

Technical Field

[0001] This utility model relates to the field of honeycomb technology, and in particular to a metal strip and a honeycomb heating element. Background Technology

[0002] Although the burners of infrared gas stoves on the market are much larger than those of atmospheric burners, the heat load of infrared gas stoves is generally lower than that of atmospheric stoves. Within a certain range, the higher heat load is more in line with the Chinese people's habit of stir-frying.

[0003] To improve the heat load of infrared gas stoves, the requirement for backfire prevention limits the increase in the thermal intensity of the honeycomb burner holes. To further improve the heat load of infrared gas stoves, larger honeycomb cells are usually used, which proportionally increases the cost of the burner, thus limiting the promotion of infrared gas stoves. Summary of the Invention

[0004] The present invention aims to solve, at least to a certain extent, one of the problems existing in the prior art. To this end, the present invention proposes a metal strip with a simple structure, easy to manufacture, high porosity, and is not easy to temper, while also effectively improving the heat intensity of the flame holes.

[0005] In addition, this utility model also proposes a honeycomb heating element, which is reasonably designed so that the honeycomb body can achieve the characteristics of different patterns in the same body and high porosity and light weight, while the fire response speed is fast.

[0006] The first objective mentioned above is achieved through the following technical solution:

[0007] A metal strip comprising:

[0008] The feature strip has a first side and a second side connected in sequence to form a plurality of alternating troughs and crests, a first fire hole is formed between two adjacent troughs, and a second fire hole is formed between two adjacent crests.

[0009] At least one flat band, wherein at least one flat band is disposed on the side of the feature band near the trough portion such that the flat band is respectively connected to a plurality of trough portions, or disposed on the side of the feature band near the crest portion such that the flat band is respectively connected to a plurality of crest portions;

[0010] Multiple first partitions are provided, each of which protrudes from one side of each first side facing the trough portion. The first partitions are connected to the first side to define a first flame hole within the first flame hole. A first through hole communicating with the first flame hole is provided on the first side.

[0011] Multiple second partitions are provided, each of which protrudes from the side of each first side facing the crest portion. The second partitions are connected to the first side to define a second flame distribution hole within the second flame hole. A second through hole communicating with the second flame distribution hole is provided on the first side.

[0012] In some embodiments, the first separator is formed by partially punching or rolling forward on the first side to create the first through hole on the first side.

[0013] In some embodiments, the second separator is formed by partially rearward stamping or rolling of the first side to create the second through hole on the first side.

[0014] In some embodiments, there are two flat bands, one of which is disposed on the side of the feature band near the trough to connect multiple troughs together, and the other flat band is disposed on the side of the feature band near the crest to connect multiple crests together, so that the feature band is located in the middle of the two flat bands.

[0015] In some embodiments, the upper end of the first ignition hole is closed or open, and the lower end of the first ignition hole is closed or open.

[0016] In some embodiments, the upper end of the second separator is closed or open, and the lower end of the second separator is closed or open.

[0017] In some embodiments, in the vertical direction, the bottom wall of the first through hole and the top wall of the second through hole are either connected to each other or spaced apart.

[0018] In some embodiments, in the vertical direction, two adjacent first separators are located on the same or different planes, and two adjacent second separators are located on the same or different planes.

[0019] In some embodiments, in the vertical direction, the bottom wall of the first separator and the top wall of the second separator are located on the same or different planes.

[0020] The second objective mentioned above is achieved through the following technical solution:

[0021] A honeycomb heating element includes a metal strip as described in any of the above embodiments. The strip is coiled to form the honeycomb structure, and pores for gas to pass through are formed between adjacent coils. The porosity of the upper end of the pores is greater than that of the lower end of the pores.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] 1. The metal strip of this utility model has a simple structure, is easy to manufacture, has high porosity, is not easy to temper, and can effectively improve the heat intensity of the flame holes.

[0024] 2. The honeycomb heating element of this utility model is reasonably designed, which enables the honeycomb body to achieve the characteristics of different patterns in the same body, high overall porosity, and light weight, while the fire response speed is relatively fast. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the honeycomb heating element in Embodiment 1 of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure during the winding process of the honeycomb heating element in Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the material-carrying structure in Embodiment 1 of this utility model;

[0029] Figure 4 yes Figure 3 A magnified view of part A in the middle;

[0030] Figure 5 This is a top view of the material strip in Embodiment 1 of this utility model;

[0031] Figure 6 yes Figure 5 A magnified view of part B in the middle section;

[0032] Figure 7 This is a schematic diagram of the material-carrying portion structure in Embodiment 1 of this utility model;

[0033] Figure 8 yes Figure 7 A magnified view of part C in the middle;

[0034] Figure 9 This is a schematic diagram of the material-carrying portion structure in Embodiment 2 of this utility model;

[0035] Figure 10 yes Figure 9 A magnified view of part D in the middle. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of the claimed invention.

[0038] Example 1:

[0039] like Figures 1 to 8 As shown, this embodiment provides a honeycomb heating element, including the metal strip described in this embodiment. The strip 7 is coiled to form a honeycomb body 8. Pores for gas to pass through are formed between adjacent coils. The porosity at the upper end of the pore is greater than that at the lower end of the pore.

[0040] Its design is reasonable, which allows the honeycomb structure to achieve the characteristics of different patterns in the same body, high overall porosity, and light weight, while also having a fast fire response speed.

[0041] In addition, in this embodiment, the honeycomb heating element is preferably applied to a stove. After the material 7 is coiled to form a honeycomb body 8, a central through hole 81 is provided in the middle of the honeycomb body 8.

[0042] Specifically, material 7 includes:

[0043] The feature band 1 has a first side 11 and a second side 12 connected in sequence to form a plurality of alternating troughs 13 and crests 14, a first fire hole 2 is formed between two adjacent troughs 13, and a second fire hole 3 is formed between two adjacent crests 14.

[0044] At least one flat band 4 is disposed on the side of the feature band 1 near the trough 13 so that the flat band 4 is connected to a plurality of troughs 13 respectively, or disposed on the side of the feature band 1 near the crest 14 so that the flat band 4 is connected to a plurality of crests 14 respectively.

[0045] Multiple first partitions 5 are respectively protruding on the side of each first side 11 facing the trough portion 13. The first partitions 5 are connected to the first side 11 to define the first flame hole 51 in the first flame hole 2. A first through hole 52 communicating with the first flame hole 51 is provided on the first side 11.

[0046] Multiple second partitions 6 are respectively protruding on the side of each first side 11 facing the crest portion 14. The second partitions 6 are connected to the first side 11 to define the second flame hole 61 in the second flame hole 3. A second through hole 62 communicating with the second flame hole 61 is provided on the first side 11.

[0047] In this embodiment, the honeycomb structure 8 is formed by winding a metal strip 7. The strip 7 consists of at least one flat strip 4 and one feature strip 1. The feature strip 1 has a first side 11 and a second side 12 connected in sequence. The first side 11 and the second side 12 are bent to form a plurality of alternating troughs 13 and crests 14. A flat strip 4 is connected to each trough 13 to connect the plurality of troughs 13 together, or a flat strip 4 is connected to each crest 14 to connect the plurality of crests 14 together. The feature strip 1 and the flat strip 4 are wound together. The honeycomb structure 8 is formed by winding, thereby achieving high porosity, resistance to tempering, and high heat intensity of the flame holes. At the same time, the flat strip 4 prevents the crests 14 or troughs 13 on each winding ring from sinking, thus forming more stable pores between the winding rings. The porosity at the upper end of the pore is higher than that at the lower end. Then, a first flame hole 2 is formed between two adjacent troughs 13, and a second flame hole 3 is formed between two adjacent crests 14. The first flame hole 2 and the second flame hole 3 can be separated by the cooperation of the first side 11 and the second side 12.

[0048] By providing a first separator 5 and a second separator 6 on the front and back sides of the first side 11 respectively, the first separator 5 is connected to the first side 11 to define the first flame hole 51 within the first flame hole 2, and the second separator 6 is connected to the first side 11 to define the second flame hole 61 within the second flame hole 3. This allows the porosity of the upper end of the honeycomb body 8 to be greater than that of the lower end, resulting in less resistance to gas passing through the pores. Compared to adding a metal mesh at the bottom, this method provides better burner injection performance, more complete gas combustion, and allows for a larger heat load on the same area of ​​the honeycomb body 8, i.e., higher area flame hole heat intensity, higher combustion temperature, and higher radiative heat transfer efficiency. Because the honeycomb structure of an infrared burner operates at a high temperature, typically exceeding 1000℃, the flame surface tends to shift downwards during combustion within the high-temperature honeycomb structure 8, potentially causing backfire. By using small holes on the lower side of the honeycomb structure 8 to reduce its porosity, the flow rate of the gas through these holes increases. Considering that the size of the small holes is close to the pore diameter during quenching, they provide some obstruction to the downward-moving flame surface. This prevents backfire even when the gas burns within the higher-temperature honeycomb structure 8. The structure is simple, easy to manufacture, has high porosity, is less prone to backfire, and effectively enhances the thermal intensity of the flame holes.

[0049] In addition, in this embodiment, the feature strip 1 is preferably a corrugated strip, but it can also be a semi-hexagonal corrugated strip, a rectangular strip or various serrated strips. The feature strip 1 has multiple alternating troughs 13 and crests 14 facing opposite directions. A first fire hole 2 is formed between adjacent troughs 13 and a second fire hole 3 is formed between adjacent crests 14.

[0050] Furthermore, the first partition 5 is formed by partially punching or rolling the first side 11 forward to form a first through hole 52 on the first side 11.

[0051] Preferably, the second separator 6 is formed by partially rearward stamping or rolling the first side 11 to form a second through hole 62 on the first side 11.

[0052] In this embodiment, a first partition 5 with a hollowed-out protrusion structure is formed by forward rolling or high-speed stamping at the front position of the first side 11. This allows the first partition 5 to connect with the first side 11, defining the first flame distribution hole 51 within the first flame hole 2. Consequently, a first through hole 52 communicating with the first flame distribution hole 51 is formed on the first side 11. Furthermore, by cutting the flat strip 4 vertically, the first flame distribution hole 51 is made to connect with the second flame distribution hole 61 through the corresponding first through hole 52, thereby increasing the through hole ratio. Simultaneously, on the back side of the first side 11... The second partition 6, formed by backward rolling or high-speed stamping, has a hollowed-out protruding structure. The second partition 6 can be connected to the first side 11 to define the second ignition hole 61 within the second ignition hole 3. A second through hole 62 connected to the second ignition hole 61 is formed on the first side 11. Furthermore, by cutting the flat strip 4 in the vertical direction, the second ignition hole 61 can be made to pass through the corresponding second through hole 62 and the first ignition hole 51 to improve the through hole ratio. At the same time, no additional consumables are required, which facilitates the rapid processing and forming of the feature strip and improves production efficiency.

[0053] Preferably, there are two flat bands 4. One flat band 4 is disposed on the side of the feature band 1 near the trough 13 to connect multiple troughs 13 together, and the other flat band 4 is disposed on the side of the feature band 1 near the crest 14 to connect multiple crests 14 together, so that the feature band 1 is located in the middle position of the two flat bands 4.

[0054] Specifically, the upper end of the first ignition hole 51 is either closed or open, and the lower end of the first ignition hole 51 is either closed or open.

[0055] Preferably, the upper end of the second ignition hole 61 is closed or open, and the lower end of the second ignition hole 61 is closed or open.

[0056] In this embodiment, the first flame distribution hole 51 is formed by rolling or high-speed stamping of the first separator 5. The first separator 5 separates the first flame distribution hole 51 from the first flame hole 2. More preferably, the upper end and the lower end of the first flame distribution hole 51 are open, so that the upper and lower ends of the first flame distribution hole 51 are connected to the first flame hole 2 respectively, thereby improving the throughput. Furthermore, the second flame distribution hole 61 is formed by rolling or high-speed stamping of the second separator 6. The second separator 6 separates the second flame distribution hole 61 from the second flame hole 3. More preferably, the upper end and the lower end of the second flame distribution hole 61 are open, so that the upper and lower ends of the second flame distribution hole 61 are connected to the second flame hole 3 respectively, thereby improving the throughput. Preferably, the feature strip 1, the first separator 5, and the second separator 6 are preferably integrally formed.

[0057] Furthermore, if the upper end of the first flame divider 51 is closed, then the lower end of the first flame divider 51 is open. In this way, some of the gas in the first flame divider can pass through the lower end of the first flame divider 51 and the first through hole 52 in sequence before entering the second flame divider 3. Similarly, if the upper end of the first flame divider 51 is open, then the lower end of the first flame divider 51 is closed. In this way, some of the gas in the second flame divider 3 can pass through the first through hole 52 and the upper end of the first flame divider 51 in sequence before entering the first flame divider 2. More preferably, if the upper end of the second flame divider 61 is closed, then the lower end of the second flame divider 61 is open. In this way, some of the gas in the second flame hole 3 can enter the first flame hole 2 through the lower end of the second flame divider 61 and the second through hole 62 in sequence. Similarly, if the lower end of the second flame divider 61 is closed, then the upper end of the second flame divider 61 is open. In this way, some of the gas in the first flame hole 2 can enter the second flame hole 3 through the second through hole 62 and the upper end of the second flame divider 61 in sequence.

[0058] More preferably, since a fire-dividing hole is correspondingly separated in the large fire holes at both ends of the first side 11, the cross-sectional area of ​​the fire-dividing hole is smaller than that of the large fire hole, thus making the hydraulic diameter of the fire-dividing hole smaller. Specifically, Dh = 4A / P, where Dh is the hydraulic diameter, A is the area of ​​the sub-hole, and P is the perimeter of the sub-hole. This is equivalent to directional densification of the fire holes on the lower side of the honeycomb body 8, which significantly improves the porosity compared to the scheme of adding wire mesh. At the same time, it can also achieve the function of preventing backfire. The fire holes on the upper side of the honeycomb body 8 are not densified, which is conducive to the complete combustion and stable combustion of the gas. The entire honeycomb body 8 achieves the characteristics of honeycomb body with different meshes, high overall porosity, and light weight. At the same time, it also has a fast fire response speed, that is, fast heating and fast heat dissipation.

[0059] Specifically, in the vertical direction, the bottom wall of the first through hole 52 and the top wall of the second through hole 62 are either connected to each other or spaced apart.

[0060] Preferably, in the vertical direction, two adjacent first separators 5 are located on the same or different planes, and two adjacent second separators 6 are located on the same or different planes.

[0061] Specifically, in the vertical direction, the bottom wall of the first partition 5 and the top wall of the second partition 6, which are arranged adjacently, are located on different planes.

[0062] In this embodiment, in the vertical direction, two adjacent first separators 5 are located on the same plane, and two adjacent second separators 6 are located on the same plane. Thus, a row of second separators 6 and first separators 5 can be respectively arranged in the vertical direction of the first side 11 of the feature strip 1. More preferably, in this embodiment, the bottom wall of the adjacent first separator 5 and the top wall of the second separator 6 are located on different planes. Thus, in the vertical direction, the bottom wall of the first through hole 52 and the top wall of the second through hole 62 are spaced apart from each other.

[0063] More preferably, when the feature strip 1, which includes the first separator 5 and the second separator 6, is wound to form a honeycomb body 8, pores for gas combustion are formed between adjacent winding rings. At this time, the flat strip 4 and the feature strip 1 are respectively configured to be located on different winding rings, so that one ring of the honeycomb body 8 is a flat strip 4 and the other ring is a corrugated feature strip 1, and the two are alternately arranged in the radial direction. Thus, the honeycomb body 8 achieves high porosity, is not prone to flashback, has high heat intensity of the flame holes, and is easy to process and manufacture.

[0064] Example 2:

[0065] like Figure 9 and 10 As shown, this embodiment provides a honeycomb structure 8. Similar to Embodiment 1, the honeycomb structure 8 is formed by winding a metal strip 7. The strip 7 has two flat strips 4 and a feature strip 1 located in the middle of the two flat strips 4. A first separator 5 and a second separator 6 are respectively provided on the front and back sides of the first side 11. The first separator 5 is connected to the first side 11 to define the first flame hole 51 in the first flame hole 2. At the same time, the second separator 6 is connected to the first side 11 to define the second flame hole 61 in the second flame hole 3. In this way, the porosity of the upper end of the honeycomb structure 8 is greater than that of the lower end, and the resistance of the gas passing through the pores is small. Compared with the solution of adding a metal wire mesh at the bottom, the burner has better injection performance and more complete combustion of gas. The heat load of the honeycomb structure 8 with the same area can be larger, that is, the area flame hole heat intensity is higher, the combustion temperature is higher, and the thermal efficiency of radiative heat transfer is higher. At the same time, it can also prevent backfire when the gas burns in the honeycomb structure 8 at a higher temperature.

[0066] Preferably, in the vertical direction, the bottom wall of the first partition 5 and the top wall of the second partition 6 are located on the same plane.

[0067] Unlike Embodiment 1, in this embodiment, a row of second separators 6 and first separators 5 are respectively arranged in the vertical direction of the first side 11 of the feature strip 1. At the same time, the bottom wall of the adjacent first separator 5 and the top wall of the second separator 6 are located on the same plane. Thus, in the vertical direction, the bottom wall of the first through hole 52 and the top wall of the second through hole 62 are interconnected. When processing the metal strip, the structure of the rolling die or stamping die in this embodiment is simpler, and the production cost of the product can be effectively reduced.

[0068] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A metal strip, characterized in that, include: The feature band (1) has a first side (11) and a second side (12) connected in sequence to form a plurality of alternating troughs (13) and crests (14), a first fire hole (2) is formed between two adjacent troughs (13), and a second fire hole (3) is formed between two adjacent crests (14). At least one flat band (4) is disposed on the side of the feature band (1) near the trough (13) so that the flat band (4) is connected to a plurality of troughs (13) respectively, or is disposed on the side of the feature band (1) near the crest (14) so ​​that the flat band (4) is connected to a plurality of crests (14) respectively; Multiple first partitions (5) are provided, each of which protrudes from each first side (11) on the side facing the trough portion (13). The first partitions (5) are connected to the first side (11) to define a first fire hole (51) in the first fire hole (2). A first through hole (52) communicating with the first fire hole (51) is provided on the first side (11). Multiple second partitions (6) are provided, each of which protrudes from the side of each first side (11) facing the crest portion (14). The second partitions (6) are connected to the first side (11) to define a second flame distribution hole (61) within the second flame hole (3). A second through hole (62) communicating with the second flame distribution hole (61) is provided on the first side (11).

2. The metal strip according to claim 1, characterized in that, The first separator (5) is formed by partially punching or rolling the first side (11) forward to form the first through hole (52) on the first side (11).

3. The metal strip according to claim 1, characterized in that, The second separator (6) is formed by partially rearward stamping or rolling of the first side (11) to form the second through hole (62) on the first side (11).

4. The metal strip according to claim 1, characterized in that, There are two flat bands (4). One flat band (4) is disposed on the side of the feature band (1) near the trough (13) to connect multiple troughs (13) together. The other flat band (4) is disposed on the side of the feature band (1) near the crest (14) to connect multiple crests (14) together, so that the feature band (1) is located in the middle position of the two flat bands (4).

5. A metal strip according to claim 1, characterized in that, The upper end of the first fire distribution hole (51) is closed or open, and the lower end of the first fire distribution hole (51) is closed or open.

6. The metal strip according to claim 1, characterized in that, The upper end of the second fire distribution hole (61) is closed or open, and the lower end of the second fire distribution hole (61) is closed or open.

7. A metal strip according to claim 1, characterized in that, In the vertical direction, the bottom wall of the first through hole (52) and the top wall of the second through hole (62) are either connected to each other or spaced apart.

8. A metal strip according to claim 1, characterized in that, In the vertical direction, two adjacent first separators (5) are located on the same or different planes, and two adjacent second separators (6) are located on the same or different planes.

9. A metal strip according to claim 1, characterized in that, In the vertical direction, the bottom wall of the first partition (5) and the top wall of the second partition (6) are located on the same or different planes.

10. A honeycomb heating element, characterized in that, The material includes a metal strip (7) as described in any one of claims 1 to 9, wherein the strip (7) is coiled to form the honeycomb body (8), and pores for gas to pass through are formed between adjacent coils, wherein the porosity of the upper end of the pores is greater than the porosity of the lower end of the pores.

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