A porous heating element and burner for a gas appliance

Abstract

The utility model relates to burner technical field, concretely provides a kind of porous heating element and combustor for gas appliance, wherein, porous heating element includes the first component and second component of fixed connection;First component and second component mutually superimposed, or first component and second component superimposed and winding arrangement;First component includes first structure part;Wherein, first structure part is used to form air hole with second component cooperation;Second component includes second structure part;Wherein, second structure part is used to when porous heating element is heated, make the thermal expansion expansion and contraction rate of second component with first component consistent.The utility model discloses porous heating element, based on the setting of first structure part and second structure part, realized the consistency of first component and second component on thermal expansion expansion and contraction rate, solved the problem of air hole deformation, improved combustion stability.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, specifically to a porous heating element and burner for use in gas appliances. Background Technology

[0002] Infrared gas stoves and burners are widely accepted by consumers due to their advantages such as high efficiency, energy saving, environmental protection, and health benefits. The porous heating element is a core component of an infrared burner. During combustion, the infrared burner releases infrared heat energy through the porous heating element, thereby achieving efficient heating of the cookware through infrared thermal radiation.

[0003] However, current porous metal heating elements still have some structural design flaws, which cause the vent holes to deform easily under high temperature conditions. Deformation of the vent holes can lead to unstable combustion and backfire in infrared burners during use, resulting in a stove malfunctioning and posing a significant safety hazard. Utility Model Content

[0004] This utility model provides a porous heating element and burner for gas appliances. The porous heating element, based on the arrangement of a first structural part and a second structural part, achieves consistency in the thermal expansion and contraction rates of the first and second components, solving the problem of gas outlet deformation and improving combustion stability. The specific technical solution is as follows:

[0005] A first aspect of this utility model provides a porous heating element for a gas appliance, comprising a first component and a second component fixedly connected together; the first component and the second component are stacked on top of each other, or the first component and the second component are stacked on top of each other and wound together.

[0006] The first component includes a first structural part; wherein the first structural part is used to cooperate with the second component to form an air outlet;

[0007] The second component includes a second structural part; wherein, when the porous heating element is heated, the second structural part is used to ensure that the thermal expansion and contraction rate of the second component is consistent with that of the first component, thereby solving the problem of air outlet deformation and improving combustion stability.

[0008] In an optional embodiment, the first structural portion includes a first corrugated structure;

[0009] The first corrugated structure includes a plurality of first waveform units, and the first waveform unit includes an arc segment and / or a straight segment.

[0010] In an optional embodiment, the first waveform unit includes a corrugated waveform unit and / or a semi-circular waveform unit formed by sequentially connecting a plurality of said arc segments;

[0011] And / or, the first waveform unit includes a polygonal waveform unit, and / or a triangular waveform unit, and / or a sawtooth waveform unit, and / or a trapezoidal waveform unit formed by sequentially connecting a plurality of the said straight line segments.

[0012] In an optional embodiment, the height of the peak of the first waveform unit is h. 11 The height of the trough is h 12 , where h 11 ≥0.5mm, h 12 ≥0.5mm.

[0013] In an optional embodiment, the second structural portion includes a second corrugated structure;

[0014] The second ripple structure includes a plurality of second waveform units, wherein the second waveform unit includes an arc segment and / or a straight segment and / or a stretchable segment.

[0015] In an optional embodiment, the height of the peak of the second waveform unit is h. 21 The height of the trough is h 22 , where h 21 <0.5mm, h 22 <0.5mm.

[0016] In an optional embodiment, the second structural part further includes a reinforcing section connected to the second corrugated structure, the reinforcing section being provided with one or more of the following: protrusions, concave points, and locally deformed sections.

[0017] In an optional embodiment, the first component and / or the second component are provided with an air passage through the direction in which the first component and the second component overlap.

[0018] In an optional embodiment, the porous heating element is provided with a damping member of a groove structure;

[0019] The first component and the second component are fitted into the damping component along the through direction of the gas outlet, so that when installed in the burner cavity of the gas appliance, the damping component forms a tight fit with the inner wall of the outer ring of the burner cavity and / or the outer wall of the central channel of the burner, thereby realizing the combustion of gas on the surface of the porous heating element.

[0020] The damping member has an air passage opening at its bottom that communicates with the air outlet, and / or the damping member has a notch at its center for passing through the central channel.

[0021] In an optional embodiment, the porous heating element further includes a current-limiting mesh;

[0022] The first component and the second component cooperate to form multiple end faces, and the end faces are located in the through direction of the air outlet; the flow-limiting mesh is attached to at least one of the end faces.

[0023] A second aspect of this utility model provides a burner for a gas appliance, comprising a porous heating element for a gas appliance as described in any of the above embodiments, as well as an ejector mixing device and a reinforcing component;

[0024] The reinforcement includes an upper reinforcement and a lower reinforcement that are fixed to each other. The upper reinforcement is disposed on the top of the porous heating element, and the lower reinforcement is disposed on the bottom of the porous heating element. The lower reinforcement is provided with a connecting part to connect to the ejector gas mixing device to form a gas communication channel.

[0025] The upper reinforcement and / or the lower reinforcement are respectively provided with an inner fixing part extending toward the center of the porous heating element and an outer fixing part extending outward; the inner fixing part is used to radially and / or axially fix the inner ring of the porous heating element, and the outer fixing part is used to radially and / or axially fix the outer ring of the porous heating element.

[0026] The outer periphery of the upper reinforcement and the outer periphery of the lower reinforcement are fitted together to form a flow guiding structure;

[0027] Preferably, the upper reinforcement and the lower reinforcement are integrated by welding, riveting or fastening.

[0028] In an optional embodiment, the burner includes the porous heating element, the mixing chamber, the ejector tube, the upper reinforcement, and the lower reinforcement.

[0029] The outlet end of the ejector tube is connected to the mixing chamber, and the outlet end of the mixing chamber is detachably and slidably connected to the lower reinforcement member; or, it further includes a connecting cavity, the outlet end of the ejector tube is connected to the mixing chamber, the outlet end of the mixing chamber is connected to the connecting cavity, and the outlet end of the connecting cavity is detachably and slidably connected to the lower reinforcement member.

[0030] A guide partition is provided on the side of the porous heating element that is connected to the lower reinforcement member. The guide partition is used to create annular intervals between the lower reinforcement member and the porous heating element, so that the interval area forms multiple independent annular gas spaces. The multiple independent annular gas spaces are connected to the outlet end of the connecting cavity or the mixing cavity, so that the gas input from the ejector tube can flow smoothly into the porous heating element.

[0031] This utility model has at least the following beneficial effects:

[0032] This utility model provides a porous heating element and burner for gas appliances, effectively solving the technical problem of inconsistent material deformation in honeycomb heating elements made from a single flat metal strip and a single corrugated metal strip. It also addresses a series of technical problems associated with existing honeycomb heating elements made from double-layered, equally corrugated strips, such as complex manufacturing processes, double-layer thickening at the overlap of corrugations, low production efficiency, high manufacturing costs, and difficulty in controlling pore size precision. This technology achieves consistency in the thermal expansion and contraction rates of the first and second structural parts of the porous heating element through asymmetrical arrangement. This ensures that the first and second components have the same or similar deformation during combustion, thus avoiding significant changes in the pore area of ​​the gas outlet. This reduces the risk of deformation, shrinkage, or collapse of the gas outlet, and ensures that the pore area and structural morphology of the gas outlet remain stable during combustion. This contributes to the stable and uniform flow of gas, improves the stability of fuel combustion in the gas outlet, and effectively prevents backfire.

[0033] The burner for gas appliances provided by this utility model has good thermal stability during use, based on the porous heating element provided by this utility model, and can meet the performance requirements of high-power combustion. In addition, the burner of this utility model also achieves radial and axial fixation of the porous heating element, which can constrain the radial and axial thermal expansion deformation of the porous heating element, and helps to further maintain the thermal stability of the gas outlet structure. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure in this embodiment where the first component and the second component are superimposed on each other;

[0036] Figure 2 for Figure 1Enlarged diagram of point A in the diagram;

[0037] Figure 3 This is a schematic diagram of the porous heating element in this embodiment, which uses a combination of rectangular and circular stacking structures.

[0038] Figure 4 This is a schematic diagram of the structure of the porous heating element in this embodiment when it is wound into a circular shape;

[0039] Figure 5 This is a schematic diagram of several optional structures for the first waveform unit in this embodiment;

[0040] Figure 6 This is a schematic diagram of the reinforcing section in this embodiment;

[0041] Figure 7 This is a schematic diagram of the structure of the first component in this embodiment;

[0042] Figure 8 This is a schematic diagram of the porous heating element embedded in the damping component provided in this embodiment;

[0043] Figure 9 This is a schematic diagram of the current limiting network structure in this embodiment;

[0044] Figure 10 This is a schematic diagram of the overall structure of the burner provided in this embodiment;

[0045] Figure 11 This is an exploded view of the overall structure of the burner provided in this embodiment;

[0046] Figure 12 This is a top view of the burner provided in this embodiment;

[0047] Figure 13 for Figure 12 A schematic diagram of the cross-section of the burner on AA;

[0048] Figure 14 for Figure 12 A schematic diagram of the cross-section of the burner on the BB;

[0049] Figure 15 This is a schematic diagram of the integrated burner provided in this embodiment.

[0050] Figure label:

[0051] 1-First component; 11-First structural part; 111-First corrugated structure; 1111-First waveform unit; 2-Second component; 21-Second structural part; 211-Second corrugated structure; 2111-Second waveform unit; 212-Reinforcing section; 2121-Protrusion; 2122-Diagonal corrugated section; 3-Air outlet; 4-Air passage hole; 5-Damping component; 51-Air passage opening; 52-Notch; 6-Flow limiting mesh; 7-Porous heating element; 7 1-Stacked unit; 72-Central through hole; 8-Ejector mixing device; 81-Connecting cavity; 82-Mixing cavity; 83-Ejector tube; 9-Reinforcing member; 91-Upper reinforcing member; 911-Inner fixing part; 912-Outer fixing part; 913-Flow guiding structure; 92-Lower reinforcing member; 921-Connecting part; 93-Guiding separator; 10-Inner ring gas chamber; 12-Outer ring gas chamber; 13-Burner; 131-Cavity; 132-Central channel. Detailed Implementation

[0052] Various embodiments of the present invention will be described more fully below. The present invention may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present invention to the specific embodiments disclosed herein, but rather the present invention should be understood to cover all adjustments, equivalents, and / or alternatives falling within the spirit and scope of the various embodiments of the present invention.

[0053] In the following, the terms “comprising” or “may include”, which may be used in various embodiments of the present invention, indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms “comprising,” “having,” and their cognates are intended only to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or the possibility of adding one or more combinations of features, numbers, steps, operations, elements, components, or combinations of the foregoing.

[0054] In various embodiments of this utility model, the expression "or" or "at least one of A and / or B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A and / or B" may include A, may include B, or may include both A and B.

[0055] The terms used in the various embodiments of this utility model (such as "first," "second," etc.) may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above terms do not limit the order and / or importance of the elements. The above terms are only used for the purpose of distinguishing one element from other elements. For example, a first user device and a second user device refer to different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of this utility model, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0056] It should be noted that, in this utility model, unless otherwise explicitly specified and defined, terms such as "installation," "connection," and "fixation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] Please refer to Figures 1 to 9 This utility model provides a porous heating element for a gas appliance, comprising a first component 1 and a second component 2 fixedly connected together. The first component 1 and the second component 2 are stacked on top of each other, or the first component 1 and the second component 2 are stacked and wound together.

[0058] The first component 1 includes a first structural part 11; wherein the first structural part 11 is used to cooperate with the second component 2 to form an air outlet 3;

[0059] The second component 2 includes a second structural part 21; wherein, the second structural part 21 is used to ensure that the thermal expansion and contraction rate of the second component 2 is consistent with that of the first component 1 when the porous heating element is heated.

[0060] It should be noted that "the thermal expansion coefficient of the second component 2 is consistent with that of the first component 1" means that the thermal expansion coefficients of the first component 1 and the second component 2 are the same, or that the thermal expansion coefficients of the first component 1 and the second component 2 are both within a preset range. Here, the thermal expansion coefficient represents the proportional relationship between the deformation of the first component 1 and the second component 2 due to thermal expansion and contraction and their original dimensions.

[0061] Therefore, when the porous heating element is heated, since the thermal expansion and contraction rate of the second component 2 is consistent with that of the first component 1, the deformation of the first component 1 and the second component 2 under thermal expansion and contraction is the same, or the difference between the deformation of the first component 1 and the second component 2 under thermal expansion is within a preset range. By ensuring that the first component 1 and the second component 2 have the same or similar deformation when heated, the stability of the vent 3 formed by the first component 1 under hot conditions is ensured. At the same time, it avoids large changes in the pore area of ​​the vent 3 under high temperature environment. Furthermore, by setting the second structural part 21 on the second component 2, the risk of deformation, shrinkage or collapse of the vent 3 is effectively controlled, so that the pore area and structural shape of the vent 3 can remain stable under the high temperature environment formed during combustion, solving the problem of vent deformation. This helps the gas to pass through stably and evenly, improves the stability of fuel combustion in the vent 3 and prevents backfire.

[0062] It should be further explained that, due to the use of a corrugated structure (i.e., the second corrugated structure described below) and / or structural units that reinforce the deformation of the substrate (i.e., the reinforcing sections described below) and texture settings on the substrate of the second component 2, the thermal expansion and contraction rate of the second component 2 can be kept consistent with that of the first component 1. When heated, the relative position between the first component 1 and the second component 2 will not change significantly or segregate, thereby improving the connection stability between the first component 1 and the second component 2. This ensures that the independent vent holes 3 will not be connected in series due to the segregation of the first component 1 and the second component 2, thereby improving the uniformity of fuel distribution in the vent holes 3 and thus improving the stability of fuel combustion.

[0063] Optionally, the overlapping first component 1 and second component 2 can be integrated by welding, riveting or fastening, or the first component 1 and second component 2 can be clamped from the upper and lower sides and / or two end faces by the cooperation of the upper structural member (refer to the upper reinforcement 91 below) and the lower structural member (refer to the lower reinforcement 92 below) to prevent the first component 1 and second component 2 from being misaligned.

[0064] Please refer to Figure 3 When the first component 1 and the second component 2 are stacked together without being wound, the stacked first component 1 and the second component 2 can form a set of stacked units 71. The porous heating element 7 includes multiple sets of stacked units 71. The multiple sets of stacked units 71 are stacked sequentially, and adjacent stacked units 71 can also be integrated by welding, riveting or fastening. Alternatively, multiple sets of stacked units 71 can be clamped from the upper and lower sides and / or two end faces by the cooperation of the upper structural member (refer to the upper reinforcement 91 below) and the lower structural member (refer to the lower reinforcement 92 below) to prevent misalignment between the stacked units 71.

[0065] Optionally, between two adjacent sets of stacked units 71, the first component 1 of one set can be stacked with the first component 1 of another set, or the first component 1 of one set can be stacked with the second component 2 of another set, or the second component 2 of one set can be stacked with the second component 2 of another set. This embodiment does not specifically limit this, as long as it can form an air outlet 3.

[0066] Optionally, the porous heating element 7 can be formed by various stacking methods among the multiple stacked units 71. These stacking methods include, but are not limited to, rectangular stacking, circular stacking, polygonal stacking, elliptical stacking, and irregular stacking. It should be noted that rectangular stacking, circular stacking, etc., indicate that the projection of the porous heating element 7 onto the through-flow direction of the air outlet 3 after stacking is rectangular, circular, or similar in shape. For details, please refer to... Figure 3 , Figure 3 The left side is composed of overlapping rectangles, while the right side is composed of overlapping circles.

[0067] Please refer to Figure 4 This refers to the case where the first component 1 and the second component 2 are stacked and wound together. Optionally, the first component 1 and the second component 2 can be... Figure 4 The porous heating element formed by the circular winding method shown has an overall cylindrical structure with a columnar height of ≥3 mm.

[0068] However, this is not the only possibility. In some cases, the first component 1 and the second component 2 can also employ other regular or irregular winding methods, such as rectangular winding. In one optional embodiment, please refer to... Figure 1 The first structural part 11 includes a first corrugated structure 111, which cooperates with the second component 2 to form an air outlet 3.

[0069] The first corrugated structure 111 is a periodically undulating corrugated structure composed of alternating crests and troughs. When the first component 1 and the second component 2 are stacked, a gap is formed between the crest or trough of the first corrugated structure 111 and the second component 2, and this gap is the air outlet 3.

[0070] Preferably, the first corrugated structure 111 includes a plurality of first waveform units 1111, wherein the first waveform unit 1111 includes an arc segment and / or a straight segment.

[0071] Optionally, the first waveform unit 1111 can be formed by mechanical force pressing.

[0072] Please refer to Figure 1 For example, the first waveform unit 1111 may include a corrugated waveform unit formed by sequentially connecting multiple arc segments.

[0073] In some other optional cases, please refer to Figure 5 The first waveform unit 1111 may also include a semi-circular waveform unit formed by connecting multiple arc segments in sequence, and a polygonal waveform unit, a triangular waveform unit, a sawtooth waveform unit, and a trapezoidal waveform unit formed by connecting multiple straight segments in sequence.

[0074] In this embodiment, the first waveform unit 1111 may include one or more combinations of waveform units of the above types, and this embodiment does not specifically limit this.

[0075] Understandably, in this embodiment, based on the fact that the first structural part 11 includes a plurality of first corrugated structures 111, the first component 1 can obtain good resistance to thermal expansion through the first corrugated structures 111. When the first component 1 is heated, the first corrugated unit 1111 can absorb the expansion and contraction of the first component 1 due to the increase in temperature through deformation, thereby reducing the degree of deformation of the first component 1 due to the concentration of thermal stress, thus ensuring the stability of the vent hole 3 structure under high-temperature combustion environment, reducing the influence of thermal stress on the area and shape of the vent hole 3, and enabling the porous heating element 7 to have good performance in withstanding long-term combustion and high-power combustion.

[0076] Since the ability of the first component 1 to resist thermal expansion is enhanced by the first corrugated structure 111, it is necessary to simultaneously improve the ability of the second component 2 to resist thermal expansion so that the thermal expansion rate of the second component 2 is consistent with that of the first component 1 when heated. At the same time, while maintaining the thermal expansion rate of the second component 2, the height of the crests and troughs of the second component 2 (i.e., the height of the crests and troughs of the second waveform unit below) or the deformation unit cannot overlap with the crests and troughs of the first component 1 (i.e., the crests and troughs of the first waveform unit below) to affect the change of the aperture area of ​​the air outlet 3. Therefore, the second component 2 should be treated with corrugated or locally reinforced and deformed units.

[0077] In an optional embodiment, the second structural part 21 includes a second corrugated structure 211, so that the thermal expansion coefficient of the second component 2 is consistent with that of the first component 1 through the arrangement of the second corrugated structure 211.

[0078] Preferably, the second ripple structure 211 includes a plurality of second waveform units 2111, and the second waveform unit 2111 includes an arc segment and / or a straight segment and / or a stretchable segment.

[0079] Optionally, the second waveform unit 2111 can be formed by mechanical pressing.

[0080] At the microscopic level, the arc-shaped segments and straight segments of the second waveform unit 2111 can form waveform units with the same structure as the arc-shaped segments and straight segments of the first waveform unit 1111. That is, the arc-shaped segments of the second waveform unit 2111 can also form arc-shaped waveform units such as corrugated waveform units and semi-circular waveform units, and the straight segments of the second waveform unit 2111 can also form straight-shaped waveform units such as polygonal waveform units, triangular waveform units, sawtooth waveform units, and trapezoidal waveform units.

[0081] In some cases, the second waveform unit 2111 includes a stretchable segment. A stretchable segment can be understood as a segment structure whose structure can change within a certain range with temperature variations, achieving stretching and deformation. The second waveform unit 2111 formed by the stretchable segment can improve the second component 2's resistance to thermal expansion based on the stretching and deformation of the stretchable segment. This embodiment does not limit the specific structure of the second waveform unit 2111 formed by the stretchable segment; it can be any of the corrugated waveform unit, semi-circular waveform unit, or polygonal waveform unit described above.

[0082] For example, the stretchable segment can be an elastic metal alloy segment with a certain degree of flexibility and elasticity.

[0083] Understandably, in this embodiment, based on the second structural part 21 including a plurality of second corrugated structures 211, the second component 2 can obtain good resistance to thermal expansion through the second corrugated structures 211, so that the thermal expansion and contraction rate of the second component 2 is consistent with that of the first component 1. Specifically, when the second component 2 is heated, the second corrugated unit 2111 can absorb the expansion and contraction of the second component 2 due to the temperature rise through deformation, thereby reducing the degree of deformation of the second component 2 due to thermal stress concentration. Both the first component 1 and the second component 2 have good resistance to thermal expansion and thermal stability. The thermal deformation characteristics and parameters of the material are considered in the initial stage of material application design, and the thermal expansion and contraction rates of the two are kept consistent. Therefore, in the high-temperature combustion environment, the deformation of the first component 1 and the second component 2 is small and similar. The vent 3 formed by the cooperation of the first component 1 and the second component 2 can have good structural stability and can maintain the original pore area and structural morphology to the maximum extent in the continuous high-temperature environment. This makes the porous heating element provided in this embodiment have good performance in terms of stable combustion and the ability to withstand long-term combustion and high-power combustion.

[0084] In the preferred embodiment, please refer to Figure 1 and Figure 2 The height of the peak of the first waveform unit 1111 is defined as h. 11 The height of the trough is h 12 , where h 11 ≥0.5mm, h 12≥0.5mm; Define the height of the peak of the second waveform unit 2111 as h. 21 The height of the trough is h 22 , where h 21 <0.5mm, h 22 <0.5mm.

[0085] In this embodiment, the peak and trough heights of the first waveform unit 1111 are greater than those of the second waveform unit 2111. When the first component 1 and the second component 2 are stacked, since the peak and trough heights of the first waveform unit 1111 and the second waveform unit 2111 are not consistent, the peaks and troughs will not overlap, thus preventing the formation of the vent 3 or affecting the area of ​​the vent 3. Under the high-temperature environment of combustion, the peaks and troughs of the first component 1 and the second component 2 will not overlap due to relative movement, thus improving the deformation resistance and reliability of the porous heating element during use.

[0086] For example, the peak height h of the second waveform unit 2111 21 and the height of the trough h 22 For example, it can be 0.4mm, 0.35mm, 0.2mm and 0.05mm, etc. The peak and valley heights of the second waveform unit 2111 can be specifically set according to the actual situation. This embodiment does not limit this. Its main purpose is to select the unit waveform size in consideration of the deformation size in the actual application process.

[0087] In some alternative embodiments, the peak and trough heights of the first waveform unit 1111 can be multiples of the peak and trough heights of the second waveform unit 2111. For example, the peak and trough heights of the first waveform unit 1111 can be 15 times the peak and trough heights of the second waveform unit 2111.

[0088] For example, when the peak height h of the first waveform unit 1111 11 and the height of the trough h 12 When the peak height h of the second waveform unit 2111 is 0.75mm, 21 and the height of the trough h 22 It is 0.05mm.

[0089] In an optional embodiment, the second structural part 21 further includes a reinforcing section 212 connected to the second corrugated structure 211, the reinforcing section 212 being provided with one or more of the following: protrusions 2121, concave points, and locally deformed sections.

[0090] Understandably, this embodiment can enhance the toughness of the second component 2 through protrusions 2121, concave points, and local deformation segments, so as to further improve the stability of the second component 2 when heated and reduce its thermal expansion and contraction rate, so as to ensure that its thermal expansion and contraction rate is consistent with that of the first component 1.

[0091] For example, the locally deformed segment could be, for instance, Figure 6 The diagonal waveform segment 2122 is shown.

[0092] In one alternative embodiment, please refer to Figure 7 The first component 1 and / or the second component 2 are provided with air passage holes 4 that extend along the overlapping direction of the first component 1 and the second component 2. The air passage holes 4 allow the gas flow in different air outlets to be connected along the overlapping direction of the first component 1 and the second component 2, so as to ensure that the gas flow in each air outlet of the porous heating element is more uniform and promotes more stable combustion of the gas flow in the porous heating element.

[0093] In one alternative embodiment, please refer to Figure 8 and Figure 9 The porous heating element 7 is also equipped with a groove-shaped damping component 5.

[0094] The first component and the second component (i.e., the porous heating element 7 shown in the figure) are fitted into the damping component 5 along the through direction h of the gas outlet, so that when installed in the burner cavity of the gas appliance, the damping component 5 forms a tight connection with the side wall of the cavity, preventing gas from overflowing from the joint between the two.

[0095] For example, the first and second components are fitted into the damping component 5 and can be semi-enclosed by the damping component 5, specifically as follows: Figure 9 As shown, the sidewall of the damping member 5 is attached to the side surfaces of the first and second members, that is, the damping member 5 is attached to the side surface of the porous heating element 7. When the damping member 5 is installed into the burner cavity along with the porous heating element 7, the portion of the damping member 5 located on the outer surface of the porous heating element 7 forms a tight fit with the inner sidewall of the outer ring of the burner cavity. In addition, since the damping members 5 are all made of flexible, elastic and high-temperature resistant metal materials, the gaps that were originally in contact with each other can be eliminated, preventing the gas flow from flowing out from the junction of the porous heating element 7 and the burner cavity, so that the gas can be stably retained in the porous heating element 7, realizing the combustion of gas on the surface of the porous heating element 7, thereby improving the stability of gas combustion.

[0096] Preferably, please combine Figure 8 and Figure 15In the embodiment where the porous heating element 7 is composed of a first component and a second component stacked and wound together, specifically, the portion of the damping component 5 located on the outer side of the porous heating element 7 forms a tight fit with the inner sidewall of the outer ring of the cavity 131 of the burner 13, and the portion of the damping component 5 located on the inner side of the central through hole 72 of the porous heating element 7 forms a tight fit with the outer sidewall of the central channel 132 of the burner 13.

[0097] Preferably, please refer to Figure 8 The bottom of the damping component 5 may be provided with an air passage opening 51 that communicates with the air outlet, so that the gas flows from the air passage opening 51 into the air outlet of the porous heating element 7.

[0098] Preferably, please refer to Figure 8 The damping member 5 may have a notch 52 at its center for the upper and lower structural members to pass through. In an embodiment where multiple stacked units are clamped from the upper and lower sides and / or two end faces by the cooperation of the upper and lower structural members, a portion of the upper and lower structural members may pass through the notch 52 to limit and fix the porous heating element. Specifically, the notch 52 may be opened at the center of the damping member 5 and may also be used for the central channel 132 to pass through.

[0099] Furthermore, the porous heating element 7 may also include a current-limiting mesh 6.

[0100] Specifically, the first component and the second component cooperate to form multiple end faces, and the end faces are located in the through direction h of the air outlet; the flow-limiting mesh 6 is attached to at least one end face.

[0101] For example, such as Figure 9 As shown, the current-limiting mesh 6 can be attached to the upper and / or lower end surfaces formed by the cooperation of the first component and the second component (refer to the porous heating element 7 in the figure). Figure 9 only shows the case where the current-limiting mesh 6 is attached to the lower end surface.

[0102] Alternatively, the first component and the second component (refer to the porous heating element 7 in the figure) are multi-layered structures, thereby forming an end face in the middle region where no end face was originally formed. The current limiting net 6 can be attached to the end face of the middle region, so that adjacent layers are separated by the current limiting net 6.

[0103] For example, the current-limiting net 6 is made of a high-temperature resistant, flexible, and elastic metal material.

[0104] Please refer to Figures 10 to 14 The present invention also provides a burner for a gas appliance, comprising a porous heating element 7 for a gas appliance as described in any of the above embodiments, an ejector mixing device 8, and a reinforcing member 9.

[0105] The reinforcement component 9 includes an upper reinforcement component 91 and a lower reinforcement component 92 that are fixed to each other. The upper reinforcement component 91 is located on the top of the porous heating element 7, and the lower reinforcement component 92 is located on the bottom of the porous heating element 7.

[0106] Understandably, the upper clamping member 91 and the lower clamping member 92 can cooperate to clamp the upper and lower end faces of the porous heating element 7, thereby achieving axial fixation of the porous heating element 7; and the upper clamping member 91 and the lower clamping member 92 can be used as follows: Figure 13 The upper and lower fasteners 91 and 92 are wrapped around the side surface of the porous heating element 7, thereby fixing the porous heating element 7 in the radial direction. The upper fastener 91 and the lower fastener 92 fix the porous heating element 7 in the axial and radial directions, which improves the stability of the porous heating element 7 and effectively prevents the upper fastener first component 1 and the lower fastener second component 2 from misaligning with each other.

[0107] Preferably, the upper clamping component 91 and the lower clamping component 92 are integrated by welding, riveting, or fastening to achieve stable clamping of the porous heating element 7. Of course, there are no restrictions on the specific connection method between the upper clamping component 91 and the lower clamping component 92.

[0108] The outlet end of the ejector mixing device 8 is connected to the inlet end face of the lower reinforcement 92 to form a gas communication channel, allowing the gas to flow through the gas channel to the porous heating element 7, thus enabling the gas to smoothly enter the porous heating element 7 and achieve stable combustion. For example, please refer to... Figure 13 The lower component 92 is provided with a connecting part 921, and the lower component 92 is connected to the ejector mixing device 8 through the connecting part 921.

[0109] The upper fixing part 91 and / or the lower fixing part 92 are respectively provided with an inner fixing part 911 extending toward the center of the porous heating element 7 and an outer fixing part 912 extending outward; the inner fixing part 911 is used to fix the inner ring of the porous heating element 7 radially and / or axially, and the outer fixing part 912 is used to fix the outer ring of the porous heating element 7 radially and / or axially.

[0110] It should be noted that the burner provided in this embodiment can be a porous heating element formed by stacking the first component and the second component, or it can be a porous heating element formed by stacking and winding the first component and the second component. It is only necessary that the porous heating element has an inner ring and an outer ring in its structure.

[0111] Understandably, in this embodiment, the inner ring of the porous heating element 7 is radially and / or axially fixed by the inner fixing part 911, and the outer fixing part 912 is radially and / or axially fixed by the outer fixing part 912, which further improves the stability of the porous heating element 7 and can constrain the radial and axial thermal expansion deformation of the porous heating element 7 to a certain extent, thereby helping to maintain the stability of the vent structure.

[0112] In some alternative embodiments, please refer to Figure 11 Both the upper fixing part 91 and the lower fixing part 92 are provided with an inner fixing part 911 and an outer fixing part 912; the inner fixing part 911 on the upper fixing part 91 and the inner fixing part 912 on the lower fixing part 92 are positioned opposite each other, and the outer fixing part 912 on the upper fixing part 91 and the outer fixing part 912 on the lower fixing part 92 are positioned opposite each other.

[0113] The cross-sectional shapes of the inner fixing part 911 and the outer fixing part 912 include circles, the inner fixing part 911 is cylindrical, and the outer fixing part 912 is annular.

[0114] Preferably, the outer periphery of the upper reinforcement 91 and the outer periphery of the lower reinforcement 92 cooperate to form a flow guiding structure 913. The flow guiding structure 913 is used to guide liquid overflowing from the external cooking vessel, which can effectively improve the safety and ease of cleaning of the burner. The flow guiding structure 913 can also prevent liquid from entering the porous heating element 7, thereby avoiding blockage or damage to the gas outlet of the porous heating element 7, which is conducive to maintaining the stability of gas flow and preventing the evaporation of overflowing liquid from interfering with the infrared radiation of the porous heating element 7.

[0115] Please refer to Figure 10 and Figure 11 In some alternative embodiments, the flow guiding structure 913 is annular in shape.

[0116] Further, in some embodiments, the ejector mixing device 8 includes a connecting cavity 81, a mixing chamber 82, and an ejector tube 83; or, the ejector mixing device 8 includes a mixing chamber 82 and an ejector tube 83. Correspondingly, the burner includes the porous heating element 7, the connecting cavity 81, the mixing chamber 82, the ejector tube 83, the upper reinforcement 91, and the lower reinforcement 92; or, the burner includes the porous heating element 7, the mixing chamber 82, the ejector tube 83, the upper reinforcement 91, and the lower reinforcement 92.

[0117] In some cases, the outlet of the ejector tube 83 is connected to the mixing chamber 82, and the outlet of the mixing chamber 82 is connected to the connecting cavity 81. The outlet of the connecting cavity 81 and the lower reinforcement 92 are detachably slidably connected. In other cases, i.e., when the connecting cavity 81 is omitted: the outlet of the ejector tube 83 is connected to the mixing chamber 82, and the outlet of the mixing chamber 82 and the lower reinforcement 92 are detachably slidably connected.

[0118] The ejector tube 83 is typically the connecting channel between the gas nozzle (not shown in the figure) and the mixing chamber 82. Its working principle is to use the kinetic energy generated by the gas to draw in the surrounding air, completing the mixing of gas and air within the pipe. The connecting cavity 81 located at the outlet end of the mixing chamber 82 can be constructed using metal and / or composite metal and / or high-temperature resistant composite materials, thus forming an ejector mixing device 8 made of composite materials. Its cavity structure can create a turbulent environment to fully agitate the mixed gas, achieving a uniform distribution of gas and air molecules. Finally, the uniformly mixed gas flow is delivered through the lower reinforcement 92 to each outlet of the porous heating element 7.

[0119] Furthermore, the air outlet of the connecting cavity 81 or the mixing cavity 82 is detachably slidably connected to the lower reinforcement 92, and the upper reinforcement 91 and the lower reinforcement 92 can also be detachably connected, which facilitates the overall disassembly of the connecting cavity 81 and / or the lower reinforcement 92 and / or the porous heating element 7, making maintenance, cleaning and other work more convenient.

[0120] In some embodiments, a guide partition 93 is provided on the side of the porous heating element 7 connected to the lower reinforcement 92. The guide partition 93 is used to create annular intervals between the lower reinforcement 92 and the porous heating element 7, so that the interval area forms multiple independent annular gas spaces. The multiple independent annular gas spaces formed by the partition 93 and the lower reinforcement 92 correspond to the gas outlet end of the connecting cavity 81 to achieve a detachable connection. Alternatively, if the connecting cavity 81 is removed, the multiple independent annular gas spaces correspond to the gas outlet end of the mixing chamber 82 to achieve a detachable connection. In this way, the gas input by the ejector tube 83 can flow smoothly into the porous heating element 7.

[0121] Understandably, the guide separator 93 constructs an annular separator structure between the lower reinforcement 92 and the porous heating element 7, forming multiple independent gas chambers through annular segment isolation, thereby enabling the premixing of gas in multiple independent spaces and precise control of airflow.

[0122] In some alternative embodiments, please refer to Figure 14 The interval area is divided into a double-ring structure of inner ring gas chamber 10 and outer ring gas chamber 12. The two chambers are supplied with premixed gas-air mixture through independent gas supply channels. The combustion intensity of the inner and outer rings can be adjusted to achieve segmented flame control and combustion.

[0123] In some embodiments, the annular partition structure can be further refined into a three-level chamber system consisting of an inner ring, a middle ring, and an outer ring.

[0124] In summary, the porous heating element and burner provided by this utility model for gas appliances effectively solves the technical problem of inconsistent material deformation in honeycomb heating elements made from a single flat metal strip and a single corrugated metal strip. It also solves a series of technical problems associated with existing honeycomb heating elements made from double-layered equal corrugated strips, such as complex manufacturing process, double-layer thickening at the overlap of wave crests, low production efficiency, high manufacturing cost, and difficulty in controlling the pore size accuracy. This technology employs an asymmetrical arrangement of the first structural part 11 and the second structural part 21 of the porous heating element. This achieves pore size stability in the first component 1, while utilizing the characteristic of the corrugated structure of the second component 2, which has a certain degree of expansion and contraction, maintains consistency in the thermal expansion and contraction rates of the first component 1 and the second component 2. This ensures that the first component 1 and the second component 2 have the same or similar deformation during combustion, thereby preventing significant changes in the pore area of ​​the exhaust port 3 under hot conditions. This reduces the risk of deformation, shrinkage, or collapse of the exhaust port 3. The pore area and structural morphology of the exhaust port 3 remain stable during combustion, which helps to ensure stable and uniform combustion of fuel, improves the stability of fuel combustion in the exhaust port 3, and effectively prevents backfire.

[0125] The burner for gas appliances provided by this invention, based on the porous heating element 7 provided by this invention, exhibits good combustion stability during use and can meet the performance requirements of high-power combustion. Furthermore, the burner of this invention achieves radial and axial fixation of the porous heating element 7, effectively improving the stability of the porous heating element 7 and constraining its radial and axial thermal expansion deformation, which helps to further maintain the stability of the gas outlet 3 structure. When the entire burner is applied to a gas appliance, it can greatly improve the combustion stability and safety of the entire gas appliance (gas stove), effectively preventing potential safety hazards.

[0126] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this utility model.

[0127] Those skilled in the art will understand that the modules in the apparatus of the implementation scenario can be distributed within the apparatus of the implementation scenario as described, or they can be located in one or more apparatuses different from this implementation scenario, with corresponding changes. The modules of the above-described implementation scenario can be combined into one module, or they can be further divided into multiple sub-modules.

[0128] The serial numbers of the above-mentioned utility models are for descriptive purposes only and do not represent the superiority or inferiority of the implementation scenarios.

[0129] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A porous heating element for use in gas appliances, characterized in that, It includes a first component and a second component that are fixedly connected; the first component and the second component overlap each other, or the first component and the second component overlap and are wound together; The first component includes a first structural part; wherein the first structural part is used to cooperate with the second component to form an air outlet; The second component includes a second structural portion; wherein the second structural portion is used to ensure that the thermal expansion coefficient of the second component is consistent with that of the first component when the porous heating element is heated.

2. A porous heating element for gas appliances according to claim 1, characterized in that, The first structural part includes a first corrugated structure; The first corrugated structure includes a plurality of first waveform units, and the first waveform unit includes an arc segment and / or a straight segment.

3. A porous heating element for gas appliances according to claim 2, characterized in that, The first waveform unit includes a corrugated waveform unit and / or a semi-circular waveform unit formed by sequentially connecting multiple arc segments; And / or, the first waveform unit includes a polygonal waveform unit, and / or a triangular waveform unit, and / or a sawtooth waveform unit, and / or a trapezoidal waveform unit formed by sequentially connecting a plurality of the said straight line segments.

4. A porous heating element for a gas appliance according to claim 2 or 3, characterized in that, The height of the peak of the first waveform unit is h 11 The height of the trough is h 12 , where h 11 ≥0.5mm, h 12 ≥0.5mm.

5. A porous heating element for a gas appliance according to claim 4, characterized in that, The second structural part includes a second corrugated structure; The second ripple structure includes a plurality of second waveform units, wherein the second waveform unit includes an arc segment and / or a straight segment and / or a stretchable segment.

6. A porous heating element for a gas appliance according to claim 5, characterized in that, The height of the peak of the second waveform unit is h 21 The height of the trough is h 22 , where h 21 <0.5mm, h 22 <0.5mm.

7. A porous heating element for a gas appliance according to claim 5, characterized in that, The second structural part further includes a reinforcing section connected to the second corrugated structure, and the reinforcing section is provided with one or more of the following: protrusions, concave points, and locally deformed sections.

8. A porous heating element for a gas appliance according to claim 1, characterized in that, The first component and / or the second component are provided with air passages that extend along the overlapping direction of the first component and the second component.

9. A porous heating element for a gas appliance according to claim 1, characterized in that, The porous heating element is provided with a groove-shaped damping component. The first component and the second component are fitted into the damping component along the through direction of the gas outlet, so that when installed in the burner cavity of the gas appliance, the damping component forms a tight fit with the inner wall of the outer ring of the burner cavity and / or the outer wall of the central channel of the burner, thereby realizing the combustion of gas on the surface of the porous heating element. The damping member has an air passage opening at its bottom that communicates with the air outlet, and / or the damping member has a notch at its center for passing through the central channel.

10. A porous heating element for a gas appliance according to claim 9, characterized in that, The porous heating element also includes a current-limiting mesh; The first component and the second component cooperate to form multiple end faces, and the end faces are located in the through direction of the air outlet; the flow-limiting mesh is attached to at least one of the end faces.

11. A burner for use in a gas appliance, characterized in that, Includes the porous heating element, ejector mixing device and reinforcement for gas appliances as described in any one of claims 1-10; The reinforcement includes an upper reinforcement and a lower reinforcement that are fixed to each other. The upper reinforcement is disposed on the top of the porous heating element, and the lower reinforcement is disposed on the bottom of the porous heating element. The lower reinforcement is provided with a connecting part to connect to the ejector gas mixing device to form a gas communication channel. The upper reinforcement and / or the lower reinforcement are respectively provided with an inner fixing part extending toward the center of the porous heating element and an outer fixing part extending outward; the inner fixing part is used to radially and / or axially fix the inner ring of the porous heating element, and the outer fixing part is used to radially and / or axially fix the outer ring of the porous heating element. The outer periphery of the upper reinforcement and the outer periphery of the lower reinforcement are fitted together to form a flow guiding structure; Preferably, the upper reinforcement and the lower reinforcement are integrated by welding, riveting or fastening.

12. A burner for a gas appliance according to claim 11, characterized in that, The burner includes the porous heating element, the mixing chamber, the ejector tube, the upper reinforcement and the lower reinforcement; The outlet end of the ejector tube is connected to the mixing chamber, and the outlet end of the mixing chamber is detachably and slidably connected to the lower reinforcement member; or, it further includes a connecting cavity, the outlet end of the ejector tube is connected to the mixing chamber, the outlet end of the mixing chamber is connected to the connecting cavity, and the outlet end of the connecting cavity is detachably and slidably connected to the lower reinforcement member. A guide partition is provided on the side of the porous heating element that is connected to the lower reinforcement member. The guide partition is used to create annular intervals between the lower reinforcement member and the porous heating element, so that the interval area forms multiple independent annular gas spaces. The multiple independent annular gas spaces are connected to the outlet end of the connecting cavity or the mixing cavity, so that the gas input from the ejector tube can flow smoothly into the porous heating element.

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