Pot rack and stove

Abstract

The utility model provides a pot rack and a stove. The pot rack comprises a pot rack body and a flow guide preheating structure, the pot rack body is annularly arranged and defines a combustion cavity, the combustion cavity is used for allowing flame of a combustor to pass through, and the pot rack body is provided with an inner side face facing the combustion cavity; the flow guide preheating structure is arranged on the inner side face of the pot rack body and used for preheating secondary air and guiding the preheated secondary air to fire holes of the combustor. The flow guide preheating structure comprises a flow guide base body and a porous medium piece, the flow guide base body is connected with the inner side face of the pot rack body, and the porous medium piece is arranged on the flow guide base body. The kitchen range disclosed by the utility model is relatively good in use performance.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a pot rack and a stove using the pot rack. Background Art

[0002] A gas stove refers to a kitchen appliance that uses direct fire heating with gas fuels such as liquefied petroleum gas, artificial gas, and natural gas.

[0003] In the related art, a gas stove includes a burner and a pot rack, wherein the pot rack includes a pot rack body arranged around the outside of the burner and pot legs arranged on the top of the pot rack body, and the pot legs are used to support the pot. When the gas stove is working, the gas enters the stove from the ejector pipe, enters the burner head after being adjusted by the gas valve, and is mixed with primary air at the same time. The mixed gas is ejected from the fire hole of the burner and ignited by the ignition device to form flames with the help of secondary air. The flames are used to heat the pot placed on the pot rack.

[0004] However, in the above-mentioned gas stove, due to the structural design of the pot rack, the temperature of the above-mentioned secondary air is relatively low, so that the heating effect of the gas stove on the pot is relatively poor, and further the overall performance of the gas stove is relatively poor. Utility Model Content

[0005] The embodiments of the present application provide a pot rack and a stove, which are used to solve the problem that the gas stove in the related art has a poor heating effect on the pot, resulting in poor overall performance of the gas stove.

[0006] On the one hand, the present application provides a boiler rack, comprising a boiler rack main body and a guide and preheating structure, the boiler rack main body is arranged in a ring shape and encloses a combustion chamber, the combustion chamber is used for the flame of the burner to pass through, and the boiler rack main body has an inner side surface arranged toward the combustion chamber; the guide and preheating structure is arranged on the inner side surface of the boiler rack main body, and the guide and preheating structure is used to preheat secondary air and guide the preheated secondary air to the fire hole of the burner; wherein, the guide and preheating structure comprises a guide substrate and a porous medium member, the guide substrate is connected to the inner side surface of the boiler rack main body, and the porous medium member is arranged on the guide substrate.

[0007] As an optional implementation, the dimension of the porous medium member in the axial direction of the pot support body is smaller than the dimension of the porous medium member in the radial direction of the pot support body.

[0008] With such arrangement, when the secondary air flows through the porous medium member, a larger portion of the porous medium member can preheat the secondary air, making the temperature of the secondary air flowing to the fire hole higher, thereby increasing the temperature of the flame ejected from the fire hole, thereby improving the heating efficiency of the cookware.

[0009] As an optional embodiment, the porosity of the porous medium member is at least 90 percent.

[0010] By limiting the porosity of the porous medium component, the heat exchange area between the secondary air and the porous medium component can be limited, so that the heat exchange area between the secondary air and the porous medium component is larger, thereby enabling the secondary air to be fully preheated, so that the temperature of the secondary air flowing to the fire hole is higher.

[0011] As an optional implementation, the flow-guiding substrate is a plate-shaped member, and at least a portion of the porous medium member is disposed on the bottom surface of the flow-guiding substrate.

[0012] In this way, when the secondary air flows to the bottom of the diversion preheating structure, the heat exchange area between the secondary air and the diversion preheating structure is larger. That is to say, at the bottom of the diversion preheating structure, the temperature of the secondary air is already higher. When the secondary air flows downstream, the temperature of the secondary air is made higher. Therefore, the temperature of the secondary air will be further increased when it flows to the fire hole, making the temperature of the flame ejected from the fire hole higher, which can further improve the heating efficiency of the cookware.

[0013] As an optional implementation, a heat-conducting column extending from the upper side of the flow-conducting substrate to the lower side of the flow-conducting substrate is provided on the flow-conducting substrate; the bottom end of the heat-conducting column is in contact with the porous medium member.

[0014] In this way, through the arrangement of the heat-conducting column, the heat on the upper part of the guide substrate can be transferred to the lower part of the guide substrate, and because the heat-conducting column abuts against the porous medium member, the heat located on the upper part of the guide substrate can be transferred to the porous medium member, so that the temperature of the bottom surface of the guide substrate and the porous medium member are both relatively high. When the secondary air flows to the lower part of the guide preheating structure, the temperature of the secondary air can be quickly increased, and the secondary air can be preheated to a higher temperature. In this way, the heat exchange efficiency between the guide preheating structure and the secondary air is relatively high, so as to further increase the temperature of the flame ejected from the fire hole.

[0015] As an optional implementation, there are multiple heat-conducting columns, and the multiple heat-conducting columns are arranged at intervals along the circumference of the pot rack body; the bottom end of each heat-conducting column abuts against the porous medium member.

[0016] In this way, multiple heat-conducting columns can transfer more heat located at the upper part of the flow-conducting preheating structure to the lower part of the flow-conducting preheating structure, so that the lower structure of the flow-conducting preheating structure can efficiently preheat the secondary air, further improving the heat exchange efficiency between the flow-conducting preheating structure and the secondary air.

[0017] As an optional implementation, a heat-conducting groove is provided at the top of the porous medium member; and the bottom end of the heat-conducting column extends into the heat-conducting groove.

[0018] In this way, the heat carried by the heat-conducting column can be quickly and more transferred to the porous medium component, and then the porous medium component realizes heat exchange with the secondary air, so as to preheat the secondary air efficiently and preheat the secondary air to a higher temperature, further increasing the ignition temperature of the flame ejected from the fire hole, thereby improving the performance of the stove.

[0019] As an optional implementation, the projected area of ​​the porous medium member on the guide substrate plate surface accounts for at least 90 percent of the guide substrate plate surface area.

[0020] In this way, the size of the porous medium member in the radial direction of the pot support body is larger, so that the heat exchange area between the secondary air and the porous medium member is larger, and further the heat exchange efficiency between the secondary air and the porous medium member is higher.

[0021] As an optional implementation, the dimension of the porous medium member in the height direction is smaller than the thickness of the flow guide substrate.

[0022] In this way, not only the heat exchange area and heat exchange efficiency between the secondary air and the porous medium member can be guaranteed, but also the normal flow of the secondary air can be prevented to a certain extent from being affected by the excessive size of the porous medium member in the height direction.

[0023] As an optional implementation, the plate surface of the flow guide substrate is arranged to be inclined downward in a direction away from the pot support body.

[0024] In this way, the end of the guide substrate close to the center of the pot rack body can be arranged closer to the fire hole, so that the secondary air can be guided to the fire hole more quickly, so that the flame ejected from the fire hole on the burner can be fully burned, thereby improving the heating efficiency of the pot.

[0025] As an optional embodiment, the guide preheating structure includes at least two guide substrates, at least two guide substrates are stacked along the height direction of the pot rack, and at least one guide substrate is connected to the pot rack body; a guide channel is defined between two adjacent guide substrates, the guide channel has an air outlet connected to the combustion chamber, and among the two adjacent guide substrates constituting the guide channel, the guide substrate located at the bottom and the inner side surface of the pot rack body define an air inlet and an outlet, and secondary air enters the guide channel from the air inlet; wherein the porous medium member is arranged in the guide channel.

[0026] In this way, by forming a guide channel in the guide preheating structure and arranging a porous medium member in the guide channel, the combination of the guide channel and the porous medium member makes the heat exchange area between the secondary air and the guide preheating structure larger, thereby further improving the preheating efficiency of the secondary air.

[0027] As an optional embodiment, the number of guide substrates is two, the upper guide substrate is connected to the pot rack body, and the lower guide substrate is connected to the upper guide substrate and is spaced apart from the pot rack body to form an annular air inlet; or, the number of guide substrates is two, both guide substrates are connected to the pot rack body, and the lower guide substrate has multiple air inlets spaced apart along the circumference of the pot rack body.

[0028] In this way, not only can a flow guiding channel be formed, but also the number of flow guiding substrates is limited, so that the manufacturing cost of the flow guiding preheating structure is relatively low.

[0029] As an optional embodiment, the guide channel has a first inner wall and a second inner wall which are arranged opposite to each other along the radial direction of the pot rack body, and the second inner wall is located on the side closer to the center of the pot rack body than the first inner wall; the porous medium member is respectively abutted against the first inner wall and the second inner wall on both sides along the radial direction of the pot rack body.

[0030] In this way, the porous medium member can occupy a larger space in the guide channel, thereby further increasing the heat exchange area between the guide preheating structure and the secondary air, and improving the preheating efficiency of the secondary air.

[0031] As an optional implementation, the extension length of the porous medium member in the circumferential direction of the pot support body is equal to the extension length of the flow guide channel in the circumferential direction.

[0032] In this way, on the circumference of the pot rack body, the guide channel is filled with porous medium members at any point in this direction. That is to say, when the secondary air flows to any point along the circumference of the pot rack body in the guide channel, the porous medium members will contact with it to preheat it. In this way, the temperature of the secondary air flowing from the air outlet to the fire hole is higher, thereby improving the performance of the stove.

[0033] As an optional implementation, at least a portion of the upper wall surface or at least a portion of the lower wall surface of the guide channel is provided with at least one of a guide heat exchange fin, a protrusion structure, a corrugated structure and a preheating spoiler.

[0034] In this way, the contact area between the secondary air and the inner wall of the guide channel can be increased by setting any of these structures, so that the flame temperature formed by mixing the preheated secondary air and the mixed gas ejected from the fire hole can be further increased to improve the heating efficiency.

[0035] As an optional implementation, there are multiple air outlets; the multiple air outlets are arranged at intervals in the circumferential direction of the pot rack body.

[0036] In this way, the secondary air can be divided into multiple flows when flowing out of the air flow channel, so that each stream of secondary air can be quickly discharged through the corresponding air outlet, so as to reduce the heat loss of the preheated secondary air during the flow process, thereby effectively increasing the ignition temperature of the flame ejected from the fire hole, and further improving the heating efficiency of the cookware.

[0037] As an optional implementation, the flow guide substrate extends continuously along the circumference of the pot support body, a porous medium member is provided on the flow guide substrate, and the porous medium member is in a closed loop shape in the circumference of the pot support body.

[0038] In this way, the secondary air can exchange heat with the porous medium member at any position on the circumference of the pot rack body, so that the secondary air can be preheated at any position on the circumference of the pot rack body, which not only improves the overall preheating temperature of the secondary air, but also makes the temperature of the secondary air on the circumference of the pot rack body close to each other. In this way, the flame temperatures ejected from each fire hole are closer, so that the pot is heated evenly.

[0039] As an optional embodiment, the guide matrix extends discontinuously along the circumference of the pot rack body, and the guide matrix includes a plurality of sub-matrices arranged at intervals along the circumference of the pot rack body. In the circumference of the pot rack body, the porous medium member is in a closed loop, and the porous medium member extends from the top of one sub-matrix to the bottom of an adjacent sub-matrix in sequence.

[0040] With this arrangement, the heat above the sub-substrate can be transferred to the bottom of the sub-substrate, that is, the surface temperature of the porous medium member below the sub-substrate will be higher, so that the secondary air can be fully preheated, making the stove have a better heating effect on the cooker.

[0041] As an optional implementation, the porous medium member includes any one of foam metal, metal mesh, metal fiber, and zeolite.

[0042] As an optional implementation, the porous medium member is fixedly connected to the flow-guiding substrate.

[0043] As an optional implementation, the flow guide base and the pot rack body are an integrated structure, so that the pot rack can be easily manufactured.

[0044] As an optional implementation, the pot rack body includes a top plate and a bottom plate connected together in the up-down direction, the top plate and the bottom plate enclose a heat-insulating cavity; and the flow-guiding matrix is ​​connected to the top plate or the bottom plate.

[0045] As an optional implementation, the flow guide base and the top plate are an integral component, or the flow guide base and the bottom plate are an integral component.

[0046] On the other hand, the present application provides a stove, including a burner and the above-mentioned pot rack, wherein the pot rack body is arranged around the burner, and the pot rack body is located above the burner; wherein, when projected along the axial direction of the pot rack body, the projection of the diversion preheating structure on the burner does not cover the fire holes in the outermost circle of the burner.

[0047] In this way, it is possible to avoid, to a certain extent, the fire ejected from the fire hole from burning the diversion preheating structure and causing damage to the diversion preheating structure, thereby extending the service life of the diversion preheating structure.

[0048] In the pot rack and stove provided in the embodiments of the present application, a guide preheating structure is provided on the inner side surface of the pot rack, and the guide preheating structure is used to preheat the secondary air and guide the preheated secondary air to the fire hole of the burner, and the guide preheating structure includes a guide substrate and a porous medium member, the guide substrate is connected to the inner side surface of the pot rack body, and the porous medium member is arranged on the guide substrate. In this way, during the use of the cooker, the flow-guiding preheating structure will be indirectly heated due to the effect of heat radiation, which will increase the surface temperature of the flow-guiding preheating structure. When the secondary air passes through the flow-guiding preheating structure, the secondary air will be preheated due to the high surface temperature of the flow-guiding preheating structure. The preheated secondary air is mixed with the mixed gas ejected from the fire hole to form a flame with a higher ignition temperature, which can efficiently and effectively heat the cookware. In addition, the flow-guiding preheating structure includes a porous medium member. Through the provision of the porous medium member, the heat exchange area between the secondary air and the flow-guiding preheating structure can be increased, so that the secondary air can be fully preheated, thereby further increasing the ignition temperature of the flame, thereby further improving the heating efficiency of the cookware. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 A diagram showing the use status of the cooker provided in the embodiment of the present application;

[0051] Figure 2 A schematic diagram of the partial structure of a cooker provided in an embodiment of the present application;

[0052] Figure 3 A schematic diagram of a three-dimensional structure of a pot rack provided in an embodiment of the present application;

[0053] Figure 4 A schematic diagram of the planar structure of another pot rack provided in an embodiment of the present application;

[0054] Figure 5 for Figure 4 Cross-sectional view along AA direction;

[0055] Figure 6 for Figure 5 A magnified schematic diagram of the local structure at B in the middle;

[0056] Figure 7 for Figure 3 Schematic diagram of the plane structure;

[0057] Figure 8 for Figure 7 Cross-sectional view along CC direction;

[0058] Fig. 9 for Figure 8 A magnified schematic diagram of the local structure at D in the middle;

[0059] Fig.10 for Figure 7 Another cross-sectional view along the CC direction;

[0060] Fig.11 for Fig.10 A magnified schematic diagram of the local structure at E in the middle;

[0061] Fig.12 A radial cross-sectional view of the flow-guiding preheating structure in the pot support provided in an embodiment of the present application;

[0062] Fig.13 A cross-sectional view of another pot rack provided in an embodiment of the present application.

[0063] Description of reference numerals:

[0064] 10. Pot rack body; 20. diversion preheating structure; 21. diversion matrix; 24. preheating spoiler; 27. porous medium member; 50. pot support foot; 60. support leg; 70. heat conduction column; 80. diversion channel;

[0065] 100, pot support; 10a, combustion chamber; 103, inner side; 10d, heat insulation chamber; 105, top plate; 106, bottom plate; 211, first flow guide matrix; 212, second flow guide matrix; 213, connecting piece; 214, sub-matrix; 241, first spoiler component; 242, second spoiler component; 24a, vortex channel; 271, heat conduction groove; 200, burner; 210, outer ring fire cover; 220, inner ring fire cover; 801, air inlet; 802, air outlet; 803, first inner wall; 804, second inner wall;

[0066] 2101, external fire hole; 2201, internal fire hole; 1000, stove; 2000, pot; 3000, countertop. DETAILED DESCRIPTION

[0067] The principles and features of the present application are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present application and are not used to limit the scope of the present application.

[0068] In the related art, a gas stove includes a burner and a pot rack, and the pot rack includes a pot rack body arranged around the outside of the burner and pot legs arranged on the top of the pot rack body, and the pot legs are used to support the pot. When the gas stove is working, the gas enters the stove from the ejector pipe, enters the burner head after being adjusted by the gas valve, and is mixed with primary air. These mixed gases are ejected from the fire hole of the burner and ignited by the ignition device to form flames with the help of secondary air. These flames are used to heat the pot placed on the pot rack. However, in the above-mentioned gas stove, due to the structural design of the pot rack, the temperature of the above-mentioned secondary air is relatively low, so that the heating effect of the gas stove on the pot is relatively poor, and thus the overall performance of the gas stove is relatively poor.

[0069] Therefore, the embodiment of the present application provides a pot rack and a stove, so that the tail flame temperature of the fire ejected from the fire hole of the burner is higher, and the stove has a better heating effect on the pot, thereby improving the overall performance of the stove.

[0070] The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0071] See also Figures 1 to 3 , Figure 1 This is a diagram of the use status of the stove provided in the embodiment of the present application. Figure 2 This is a schematic diagram of the partial structure of the cooker provided in the embodiment of the present application. Figure 3 A schematic diagram of a three-dimensional structure of a pot rack provided in an embodiment of the present application. As shown in the figure, the present embodiment provides a pot rack 100, including a pot rack body 10, which is arranged in a ring shape and encloses a combustion chamber 10a, and the combustion chamber 10a is used for the flame of the burner 200 to pass through. Specifically, the burner 200 has a fire hole, and the flame can be ejected through the fire hole. Generally, in order to set the pot 2000 above the pot rack body 10, a pot support foot 50 will be set on the top of the pot rack body 10, and at the same time, in order to place the pot rack 100 on the table 3000, a support leg 60 supported on the table 3000 will be set at the bottom of the pot rack body 10.

[0072] There are multiple pot legs 50 and supporting legs 60, which are arranged at intervals along the circumference of the pot rack body 10, and the pot legs 50 and supporting legs 60 can be connected to the pot rack body 10 by welding or integral molding. Here, there is no specific restriction on the connection between the pot legs 50 and the pot rack body 10 and the connection between the supporting legs 60 and the pot rack body 10.

[0073] In some specific embodiments, the burner 200 may include an outer ring fire cover 210 and an inner ring fire cover 220. The outer ring fire cover 210 is formed with an outer fire hole 2101, and the inner ring fire cover 220 is formed with an inner fire hole 2201. Both the outer fire hole 2101 and the inner fire hole 2201 can spray flames upward.

[0074] It is understandable that secondary air is needed in the process of flame formation. If the temperature of the secondary air is low, the ignition temperature of the flame will be low, that is, the temperature of the flame heating the pot 2000 will be low. This will make the heating effect of the stove 1000 on the pot 2000 poor.

[0075] Therefore, in this embodiment, in order to improve the heating effect of the cooker 1000 on the cooker 2000, a flow guiding preheating structure 20 can be provided on the cooker frame body 10. Figures 4 to 6 , Figure 4 This is a schematic diagram of the planar structure of another pot rack provided in an embodiment of the present application. Figure 5 for Figure 4 Cross-sectional view along AA direction, Figure 6 for Figure 5 The enlarged schematic diagram of the local structure at B in the figure. Specifically, the pot support body 10 has an inner side surface 103 arranged toward the combustion chamber 10a, and the flow guiding and preheating structure 20 is arranged on the inner side surface 103, and the flow guiding and preheating structure 20 is used to preheat the secondary air and guide the preheated secondary air to the fire hole of the burner 200, and the fire hole here can be an outer fire hole 2101; wherein, the flow guiding and preheating structure 20 includes a flow guiding substrate 21 and a porous medium member 27, the flow guiding substrate 21 is connected to the inner side surface 103 of the pot support body 10, and the porous medium member 27 is arranged on the flow guiding substrate 21.

[0076] In this way, during the use of the stove 1000, the flow-guiding preheating structure 20 will be indirectly heated due to the effect of heat radiation, so that the surface temperature of the flow-guiding preheating structure 20 will be increased. When the secondary air passes through the flow-guiding preheating structure 20, due to the high surface temperature of the flow-guiding preheating structure 20, the secondary air will be preheated. The preheated secondary air is mixed with the mixed gas ejected from the outer fire hole 2101 and the mixed gas ejected from the inner fire hole 2201 to form a flame with a higher ignition temperature, which can efficiently and effectively heat the cookware 2000. In addition, the flow-guiding preheating structure 20 includes a porous medium member 27. Through the setting of the porous medium member 27, the heat exchange area between the secondary air and the flow-guiding preheating structure 20 can be increased, so that the secondary air can be fully preheated, thereby further increasing the ignition temperature of the flame, thereby further improving the heating efficiency of the cookware 2000.

[0077] The porous medium member 27 includes any one of foam metal, metal mesh, metal fiber, and zeolite. It is understandable that the porous medium member 27 can be made of any one of foam metal, metal mesh, metal fiber, and zeolite as a raw material.

[0078] Specifically, foam metal refers to a special metal material containing foam pores; the metal mesh can be a metal plate mesh, that is, a metal plate with holes of various shapes on the surface; metal fiber refers to a fiber-shaped material with a high metal content, continuous distribution of metal materials, and a lateral size of microns; zeolite refers to a microporous crystalline aluminosilicate material.

[0079] In some optional embodiments, the foam metal may be foam copper. Here, the type of material used to make the porous medium member 27 is not specifically limited.

[0080] In order to further increase the heat exchange area between the secondary air and the preheating guide structure 20, the shape of the porous medium member 27 can be restricted. For example, in some optional embodiments, the size of the porous medium member 27 in the axial direction of the pot support body 10 is smaller than the size of the porous medium member 27 in the radial direction of the pot support body 10. That is to say, for the porous medium member 27 itself, the size of the porous medium member 27 in the radial direction of the pot support body 10 is larger, so that the porous medium member 27 is a plate-like structure or a sheet-like structure as a whole. In this way, when the secondary air flows through the porous medium member 27, a larger part of the porous medium member 27 can preheat the secondary air, so that the temperature of the secondary air flowing to the fire hole is higher, and then the temperature of the flame ejected from the fire hole can be increased to improve the heating efficiency of the pot 2000.

[0081] It can be understood that if the number of openings on the porous medium member 27 is greater, the heat exchange area between the secondary air and the porous medium member 27 will be larger. Therefore, in some specific embodiments, the porosity of the porous medium member 27 can also be limited. Specifically, the minimum porosity of the porous medium member 27 is ninety percent, that is, the porosity of the porous medium member 27 is greater than or equal to ninety percent.

[0082] For example, the porosity of the porous medium member 27 may be 90%, 91%, 92%, 93%, 94%, etc. Here, the porosity of the porous medium member 27 is not particularly limited.

[0083] By limiting the porosity of the porous medium member 27 as mentioned above, the heat exchange area between the secondary air and the porous medium member 27 can be limited, so that the heat exchange area between the secondary air and the porous medium member 27 is larger, thereby enabling the secondary air to be fully preheated, so that the temperature of the secondary air flowing to the fire hole is higher.

[0084] In some embodiments, in order to facilitate the manufacturing and forming of the guide matrix 21, the guide matrix 21 can be a plate-shaped member, and the thickness direction of the guide matrix 21 can be consistent with the axial direction of the pot rack body 10, that is, the guide matrix 21 has a top surface and a bottom surface spaced apart along the axial direction of the pot rack body 10, and the secondary air enters from the gap formed between the pot rack body 10 and the table top 3000, that is, the secondary air flows from the bottom of the guide preheating structure 20 to the guide preheating structure 20, so that at least a portion of the porous medium member 27 can be set on the bottom surface of the guide matrix 21.

[0085] In this way, when the secondary air flows to the bottom of the guide preheating structure 20, the heat exchange area between the secondary air and the guide preheating structure 20 is larger, that is, at the bottom of the guide preheating structure 20, the temperature of the secondary air is already higher, and when the secondary air flows downstream, the temperature of the secondary air is made higher, so that the temperature of the secondary air when it flows to the fire hole will be further increased, so that the temperature of the flame ejected from the fire hole is higher, which can further improve the heating efficiency of the cooker 2000.

[0086] It is not difficult to understand that during the use of the stove 1000, under the action of thermal radiation, the temperature of both the top surface and the bottom surface of the guide substrate 21 will increase. From the above, it can be seen that at least part of the porous medium member 27 is arranged on the bottom surface of the guide substrate 21. Therefore, in some optional embodiments, in order to improve the heat exchange efficiency between the guide preheating structure 20 and the secondary air, the heat located at the upper part of the guide substrate 21 can be transferred to the lower part of the guide substrate 21, and then transferred to the porous medium member 27, so as to improve the heat exchange efficiency between the porous medium member 27 and the secondary air.

[0087] Therefore, if Figures 4 to 6 As shown, a heat-conducting column 70 extending from the upper part of the flow-conducting substrate 21 to the lower part of the flow-conducting substrate 21 can be provided on the flow-conducting substrate 21; the bottom end of the heat-conducting column 70 abuts against the porous medium member 27. In this way, through the provision of the heat-conducting column 70, the heat of the upper part of the flow-conducting substrate 21 can be transferred to the lower part of the flow-conducting substrate 21, and because the heat-conducting column 70 abuts against the porous medium member 27, the heat located at the upper part of the flow-conducting substrate 21 can be transferred to the porous medium member 27, so that the temperature of the bottom surface of the flow-conducting substrate 21 and the porous medium member 27 are both high. When the secondary air flows to the lower part of the flow-conducting preheating structure 20, the temperature of the secondary air can be quickly increased, and the secondary air can be preheated to a higher temperature. In this way, the heat exchange efficiency between the flow-conducting preheating structure 20 and the secondary air is high, so as to further increase the temperature of the flame ejected from the fire hole.

[0088] Moreover, since the flow-guiding preheating structure 20 can be radiated with heat in the circumferential direction of the pot rack body 10, a plurality of heat-conducting columns 70 can be provided in order to transfer more heat from the upper part of the flow-guiding preheating structure 20 to the lower part of the flow-guiding preheating structure 20, and the plurality of heat-conducting columns 70 are arranged at intervals along the circumferential direction of the pot rack body 10; the bottom end of each heat-conducting column 70 abuts against the porous medium member 27. In this way, the plurality of heat-conducting columns 70 can transfer more heat from the upper part of the flow-guiding preheating structure 20 to the lower part of the flow-guiding preheating structure 20, so that the lower structure of the flow-guiding preheating structure 20 can efficiently preheat the secondary air, further improving the heat exchange efficiency between the flow-guiding preheating structure 20 and the secondary air.

[0089] In some optional embodiments, in order to transfer more and faster heat from the heat-conducting column 70 to the porous medium member 27, the heat exchange area between the heat-conducting column 70 and the porous medium member 27 can be increased, so a heat-conducting groove 271 can be opened at the top of the porous medium member 27; the bottom end of the heat-conducting column 70 extends into the heat-conducting groove 271. In this way, the heat carried by the heat-conducting column 70 can be quickly and more transferred to the porous medium member 27, and then the porous medium member 27 can realize heat exchange with the secondary air, so as to preheat the secondary air efficiently and preheat the secondary air to a higher temperature, further increase the ignition temperature of the flame ejected from the fire hole, and improve the performance of the stove 1000.

[0090] In order to transfer more heat at the bottom of the heat-conducting column 70 to the porous medium member 27 more quickly, the bottom area of ​​the heat-conducting column 70 can be made larger. Specifically, the outer diameter of the heat-conducting column 70 can be gradually increased from top to bottom. In this way, the area of ​​the bottom of the heat-conducting column 70 is larger, and the heat on the heat-conducting column 70 can be transferred to the porous medium member 27 more quickly, so as to improve the heat exchange efficiency between the porous medium member 27 and the secondary air.

[0091] From the above, it can be seen that when the flow guide substrate 21 is a plate-shaped member, at least a portion of the porous medium member 27 is arranged on the bottom surface of the flow guide substrate 21. Therefore, it can be understood that if the projection area of ​​the porous medium member 27 on the bottom surface of the flow guide substrate is larger, the heat exchange area between the porous medium member 27 and the secondary air is larger and the heat exchange efficiency is faster, and vice versa.

[0092] Therefore, in some optional embodiments, the size of the projection area of ​​the porous medium member 27 on the bottom surface of the guide substrate can be limited. Specifically, the projection area of ​​the porous medium member 27 on the plate surface of the guide substrate 21 can account for at least ninety percent of the plate surface area of ​​the guide substrate 21, that is, the projection area of ​​the porous medium member 27 on the bottom surface of the guide substrate 21 can account for at least ninety percent of the bottom surface area of ​​the guide substrate 21.

[0093] Exemplarily, the projection area of ​​the porous medium member 27 on the surface of the guide substrate 21 accounts for 90%, 91%, 92%, 93%, 94%, 95%, etc. of the surface area of ​​the guide substrate 21. Here, there is no specific limitation on the proportion of the projection area of ​​the porous medium member 27 on the surface of the guide substrate 21.

[0094] In this way, when the projected area of ​​the porous medium member 27 on the plate surface of the guide substrate 21 accounts for at least ninety percent of the plate surface area of ​​the guide substrate 21, the radial size of the porous medium member 27 in the pot rack body 10 is larger, which makes the heat exchange area between the secondary air and the porous medium member 27 larger, thereby making the heat exchange efficiency between the secondary air and the porous medium member 27 higher.

[0095] During the use of the stove 1000, the secondary air continues to flow downstream to the fire hole after flowing through the porous medium member 27. If the size of the porous medium member 27 in the height direction is large, the flow efficiency of the secondary air will be affected. Therefore, the size of the porous medium member 27 in the height direction cannot be too large. Therefore, as an optional embodiment, the size of the porous medium member 27 in the height direction is smaller than the thickness of the flow guide substrate 21. In this way, not only the heat exchange area and heat exchange efficiency between the secondary air and the porous medium member 27 can be guaranteed, but also the normal flow of the secondary air can be avoided to a certain extent due to the excessive size of the porous medium member 27 in the height direction.

[0096] It should be noted that the height direction mentioned above is Figure 1 , Figure 3 and Figure 5 The direction of the zz axis is consistent.

[0097] Generally, the fire hole of the burner 200 is located near the bottom of the pot rack body 10. Therefore, in order to enable the flow guide base 21 to effectively guide the secondary air, in some embodiments, the plate surface of the flow guide base 21 is arranged to be inclined downward in the direction away from the pot rack body 10, that is, the plate surface of the flow guide base 21 is arranged to be inclined downward in the direction close to the center of the pot rack body 10. In this way, the end of the flow guide base 21 close to the center of the pot rack body 10 can be arranged closer to the fire hole, and the secondary air can be guided to the fire hole more quickly, so that the flame ejected from the fire hole on the burner 200 can be fully burned, so as to improve the heating efficiency of the pot 2000.

[0098] Please combine Figure 3 , Figures 7 to 9 , Figure 7 for Figure 3 Schematic diagram of the planar structure, Figure 8 for Figure 7 Cross-sectional view along CC direction, Fig. 9 for Figure 8 In order to further increase the heat exchange area between the secondary air and the guide preheating structure 20, the contact time between the secondary air and the guide preheating structure 20 can be extended, that is, the path of the secondary air flowing through the guide preheating structure 20 can be extended.

[0099] Specifically, the guide preheating structure 20 includes at least two guide substrates 21, and at least two guide substrates 21 are stacked along the height direction of the pot rack 100, wherein at least one guide substrate 21 is connected to the pot rack body 10; a guide channel 80 is defined between two adjacent guide substrates 21, and the guide channel has an air outlet 802 connected to the combustion chamber 10a, and among the two adjacent guide substrates 21 constituting the guide channel 80, the guide substrate 21 located at the bottom and the inner side surface of the pot rack body 10 define an air inlet 801, and secondary air enters the guide channel 80 from the air inlet 801; wherein, the porous medium member 27 is arranged in the guide channel 80.

[0100] In this way, by forming a guide channel 80 in the guide preheating structure 20 and setting the porous medium member 27 in the guide channel 80, the combination of the guide channel 80 and the porous medium member 27 makes the heat exchange area between the secondary air and the guide preheating structure 20 larger, which can further improve the preheating efficiency of the secondary air.

[0101] Furthermore, in order to form the above-mentioned guide channel 80 and to reduce the manufacturing cost of the guide preheating structure 20 to a certain extent, in some optional embodiments, the number of the guide substrates 21 is two, the upper guide substrate 21 is connected to the pot rack body 10, and the lower guide substrate 21 is connected to the upper guide substrate 21 and is spaced apart from the pot rack body 10 to form an annular air inlet 801.

[0102] Specifically, the two flow guide substrates 21 include a first flow guide substrate 211 located at the top and a second flow guide substrate 212 located at the bottom, and the inner side of the first flow guide substrate 211 and the inner side of the second flow guide substrate 212 are connected by a connecting piece 213, an air inlet is formed between the second flow guide substrate 212 and the pot rack body 10, and an air outlet 802 is opened on the connecting piece 213.

[0103] In addition, in some specific embodiments, the first flow guiding substrate 211 and the second flow guiding substrate 212 may both be plate-shaped members.

[0104] The first flow-guiding substrate 211, the second flow-guiding substrate 212 and the connecting member 213 may be an integral structure or a split structure, and when the first flow-guiding substrate 211, the second flow-guiding substrate 212 and the connecting member 213 are split structures, the first flow-guiding substrate 211, the second flow-guiding substrate 212 and the connecting member 213 may be connected between the first flow-guiding substrate 211 and the second flow-guiding substrate 212 by bonding or welding, or two of the first flow-guiding substrate 211, the second flow-guiding substrate 212 and the connecting member 213 may be an integral structure and then connected to a third party by bonding or welding. Here, the connection method between the first flow-guiding substrate 211, the second flow-guiding substrate 212 and the connecting member 213 is not specifically limited.

[0105] Further, the porous medium member 27 is fixedly connected to the flow guide substrate 21. Specifically, the porous medium member 27 can be connected to the first flow guide substrate 211, or to the second flow guide substrate 212, or to the connector 213, or to the first flow guide substrate 211, the second flow guide substrate 212, and the connector 213, or to the first flow guide substrate 211, the second flow guide substrate 212, and the connector 213 at the same time, or to the first flow guide substrate 211, the second flow guide substrate 212, and the connector 213 at the same time. The fixed connection here can be understood as bonding or welding, etc. Here, there is no specific limitation on the connection method between the porous medium member 27 and the flow guide substrate 21.

[0106] In some embodiments, in order to allow the secondary air to quickly flow to the fire hole through the air outlet 802 and avoid a large amount of heat loss in the secondary air during the flow process, multiple air outlets 802 may be provided; the multiple air outlets 802 are formed on the connecting piece 213 and are arranged at intervals in the circumferential direction of the pot rack body 10. In this way, the secondary air can be divided into multiple flows when flowing out of the guide channel 80, so that each flow of secondary air can be quickly discharged through the corresponding air outlet 802, so as to reduce the heat loss of the preheated secondary air during the flow process, thereby effectively increasing the ignition temperature of the flame ejected from the fire hole, and further improving the heating efficiency of the pot 2000.

[0107] In addition, when multiple air outlets 802 are arranged at intervals along the circumference of the pot rack body 10, the secondary air can flow to more fire holes of the burner 200, making the temperature of the flame ejected from each fire hole closer, so that the pot 2000 can be heated evenly, further improving the performance of the stove 1000.

[0108] Please combine Fig.10 and Fig.11 , Fig.10 for Figure 7 Another cross-sectional view along the CC direction, Fig.11 for Fig.10A schematic diagram of the enlarged local structure at E in the middle. As shown in the figure, in some other optional embodiments, the number of the guide substrates 21 is two, both of which are connected to the pot rack body 10, and the guide substrate 21 located at the bottom has a plurality of air inlets 801 arranged at intervals along the circumference of the pot rack body 10.

[0109] In order to increase the heat exchange area between the secondary air and the guide channel 80, in some embodiments, at least a portion of the upper wall or at least a portion of the lower wall of the guide channel 80 is provided with at least one of a guide heat exchange fin, a protrusion structure, a corrugated structure and a preheating spoiler 24.

[0110] Among them, the guide heat exchange fins can be a sheet structure integrally formed with the first guide substrate 211 or the second guide substrate 212 and extending toward the interior of the guide channel 80, the protrusion structure can be a convex column, a bump or a bulge formed on the first guide substrate 211 or the second guide substrate 212 and extending toward the interior of the guide channel 80, and the corrugated structure can be a part of the lower surface of the first guide substrate 211 formed into a wavy surface or a part of the upper surface of the second guide substrate 212 formed into a wavy surface.

[0111] Please combine Fig.12 , Fig.12 A radial cross-sectional view of the flow guide preheating structure in the pot rack provided in the embodiment of the present application. The preheating spoiler 24 may include a first spoiler 241 and a second spoiler 242. When a plurality of preheating spoilers 24 are arranged along the circumference of the pot rack body 10, a plurality of first spoilers 241 and a plurality of second spoilers 242 are alternately arranged along the circumference of the pot rack body 10, and a vortex channel 24a is formed between a first spoiler 241 and a second spoiler 242.

[0112] It can be understood that the first spoiler component 241 and the second spoiler component 242 can be the same or different. In this embodiment, the position or shape design of the first spoiler component 241 and the second spoiler component 242 to form a specific shape of the vortex channel 24a can save the cost of the hole opening process and facilitate the cleaning of the vortex channel 24a to reduce blockage.

[0113] Exemplarily, the first spoiler 241 and the second spoiler 242 are in the shape of a flat sheet, so as to facilitate production. The extension direction of the first spoiler 241 and the extension direction of the second spoiler 242 after installation are set at an angle to the radial direction of the pot rack body 10. In this way, when the smoke or secondary air passes through the first spoiler 241 or the second spoiler 242, it will flow along the first spoiler 241 and the second spoiler 242, avoiding the smoke or secondary air from being directly discharged along the radial direction of the pot rack body 10, thereby achieving the effect of extending the residence time of the smoke or secondary air on the guide preheating structure 20. For example, the first spoiler 241 and the second spoiler 242 of each preheating spoiler 24 are formed in an "eight" shape on the upper surface of the second guide substrate 212.

[0114] In this way, by setting any of the above-mentioned structures, the contact area between the secondary air and the inner wall surface of the guide channel 80 can be increased, so that the flame temperature formed by mixing the preheated secondary air and the mixed gas sprayed from the fire hole can be further increased to improve the heating efficiency.

[0115] Since the porous medium member 27 is disposed in the flow guiding channel 80 , if the porous medium member 27 occupies more volume inside the flow guiding channel 80 , the heat exchange area between the secondary air and the flow guiding preheating structure 20 will be larger.

[0116] Therefore, in this embodiment, the flow guiding channel 80 has a first inner wall 803 and a second inner wall 804 which are arranged opposite to each other along the radial direction of the pot support body 10, and the second inner wall 804 is located on a side closer to the center of the pot support body 10 than the first inner wall 803; the two sides of the porous medium member 27 along the radial direction of the pot support body 10 are respectively in contact with the first inner wall 803 and the second inner wall 804. In this way, the porous medium member 27 can occupy a larger space in the flow guiding channel 80, thereby further increasing the heat exchange area between the flow guiding preheating structure 20 and the secondary air, and improving the preheating efficiency of the secondary air.

[0117] In the circumferential direction of the pot rack body 10, if the porous medium member 27 can occupy more space in the guide channel 80, the heat exchange area between the secondary air and the guide preheating structure 20 will also be increased. Therefore, in an optional embodiment, the extension length of the porous medium member 27 in the circumferential direction of the pot rack body 10 is equal to the extension length of the guide channel 80 in the direction. In this way, in the circumferential direction of the pot rack body 10, the guide channel 80 is filled with porous medium members 27 at any point in this direction. That is to say, when the secondary air flows to any point in the guide channel 80 along the circumferential direction of the pot rack body 10, the porous medium member 27 will contact with it to preheat it. In this way, the temperature of the secondary air flowing from the air outlet 802 to the fire hole is higher, which improves the performance of the stove 1000.

[0118] In this embodiment, the flow guide base 21 can be arranged on the inner side surface 103 in two ways. One is that the flow guide base 21 extends continuously along the circumference of the pot rack body 10, and the other is that the flow guide base 21 extends intermittently along the circumference of the pot rack body 10.

[0119] For these two methods, the arrangement of the porous medium member 27 is also different. Specifically, when the guide substrate 21 extends continuously along the circumference of the pot rack body 10, a porous medium member 27 is provided on the guide substrate 21, and the porous medium member 27 is in a closed loop along the circumference of the pot rack body 10. That is to say, no matter whether the guide substrate 21 is a plate-shaped member or has a guide channel 80 formed inside, the porous medium member 27 is in a closed loop along the circumference of the pot rack body 10.

[0120] In this way, the secondary air can exchange heat with the porous medium member 27 at any position of the pot rack body 10 in the circumferential direction, so that the secondary air can be preheated at any position of the pot rack body 10 in the circumferential direction, which not only can improve the overall preheating temperature of the secondary air, but also can make the temperature of the secondary air in the circumferential direction of the pot rack body 10 close to each other, so that the temperature of the flame ejected from each fire hole is closer, so that the pot 2000 is heated evenly.

[0121] Please combine Fig.13 , Fig.13 A cross-sectional view of another pot rack provided in an embodiment of the present application. As shown in the figure, when the flow guide matrix 21 extends intermittently along the circumference of the pot rack body 10, the flow guide matrix 21 includes a plurality of sub-matrices 214 arranged at intervals along the circumference of the pot rack body 10. In the circumference of the pot rack body 10, the porous medium member 27 is in a closed loop shape, and the porous medium member 27 extends from the top of one sub-matrix 214 to the bottom of the adjacent sub-matrix 214 in sequence. At this time, the sub-matrix 214 is a plate-shaped member. In other words, in the circumference of the pot rack body 10, the porous medium member 27 is made to fluctuate. In this way, the heat above the sub-matrix 214 can be transferred to the bottom of the sub-matrix 214, that is, the surface temperature of the porous medium member 27 located below the sub-matrix 214 will be higher, so that the secondary air can be fully preheated, so that the stove 1000 has a better heating effect on the pot 2000.

[0122] In some embodiments, in order to facilitate the production of the pot rack 100 , the flow guide base 21 and the pot rack body 10 are an integrated structure, that is, the flow guide base 21 and the pot rack body 10 are integrally formed.

[0123] That is to say, when the flow guiding base 21 is a plate-shaped member, the flow guiding base 21 and the pot support body 10 are an integrated structure.

[0124] When a guide channel 80 is formed inside the guide matrix 21, at least the first guide matrix 211 and the pot rack body 10 are integrally formed, that is, the connecting member 213, the first guide matrix 211 and the pot rack body 10 can be an integral structure, or the first guide matrix 211 and the pot rack body 10 are an integral structure, and the connecting member 213 and the first guide matrix 211 are split structures, for example, the connecting member 213 and the first guide matrix 211 are connected by bonding or welding.

[0125] like Fig. 9 As shown, the first flow guide base 211 and the pot support body 10 may be an integrated structure, the connecting member 213 and the first flow guide base 211 may be a separate structure, and the connecting member 213 and the second flow guide base 212 may be an integrated structure. Here, the connection and molding method between the flow guide base 21 and the pot support body 10 is not specifically limited.

[0126] It is understandable that the user may come into contact with the top structure of the pot rack body 10 when using the stove 1000. Therefore, in order to prevent the high temperature of the top structure of the pot rack body 10 from causing harm to the user, an insulating cavity 10d can be formed inside the pot rack body 10 to prevent the top structure of the pot rack body 10 from being too high to a certain extent.

[0127] Therefore, if Figure 5 , Figure 6 , Figure 8 as well as Fig. 9 As shown, in some embodiments, the pot rack body 10 includes a top plate 105 and a bottom plate 106 connected together in the up and down directions. The top plate 105 and the bottom plate 106 can both be metal parts. Therefore, the top plate 105 and the bottom plate 106 can be welded together, and the top plate 105 and the bottom plate 106 enclose a heat-insulating cavity 10d; the guide base 21 is connected to the top plate 105 or the bottom plate 106.

[0128] That is, when the flow guide substrate 21 is a plate-shaped member, the flow guide substrate 21 is connected to the top plate 105 or the bottom plate 106 ; when a flow guide channel 80 is formed inside the flow guide substrate 21 , the first flow guide substrate 211 is connected to the top plate 105 or the bottom plate 106 .

[0129] Among them, the pot support leg 50 is arranged on the top of the top plate 105, the support leg 60 is arranged on the bottom of the bottom plate 106, and the connection method between the pot support leg 50 and the top plate 105 and the connection method between the support leg 60 and the bottom plate 106 can both be welding.

[0130] In some embodiments, in order to facilitate the molding of the flow guide substrate 21, when the flow guide substrate 21 is connected to the top plate 105, the flow guide substrate and the top plate 105 are an integral component. That is, when the flow guide substrate 21 is a plate-shaped member, the flow guide substrate 21 and the top plate 105 are an integral component; when a flow guide channel 80 is formed inside the flow guide substrate 21, the first flow guide substrate 211 and the top plate 105 are an integral component.

[0131] When the flow guide base 21 is connected to the bottom plate 106, the flow guide base 21 and the bottom plate 106 are an integral component. In other words, when the flow guide base 21 is a plate-shaped member, the flow guide base 21 and the bottom plate 106 are an integral component; when a flow guide channel 80 is formed inside the flow guide base 21, the first flow guide base 211 and the bottom plate 106 are an integral component.

[0132] It should be noted that the flow guide substrate 21 can be formed by stamping, stretching, bending and other processes to form an integral component with the top plate 105 or the bottom plate 106. Here, the forming method of the flow guide substrate 21 is not specifically limited.

[0133] This embodiment also provides a stove 1000, comprising a burner 200 and the pot rack 100 in the above embodiment, the pot rack body 10 is arranged around the burner, and the pot rack body 10 is located above the burner; wherein, when projected along the axial direction of the pot rack body 10, the projection of the diversion preheating structure 20 on the burner 200 does not cover the fire holes of the outermost circle of the burner 200. In this way, it is possible to avoid, to a certain extent, the fire ejected from the fire holes from burning the diversion preheating structure 20 and causing damage to the diversion preheating structure 20, thereby extending the service life of the diversion preheating structure 20.

[0134] Among them, the fire holes in the outermost circle of the burner 200 can be the above-mentioned outer fire holes 2101.

[0135] It should be noted that the stove 1000 provided in this embodiment should also include other components, such as a blast device, etc. Here, other components in the stove 1000 provided in this embodiment are not introduced one by one.

[0136] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0137] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0138] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0139] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0140] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0141] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A pot stand, characterized in that: include: The pot support body is arranged in an annular shape and encloses a combustion chamber, wherein the combustion chamber is used for the flame of the burner to pass through, and the pot support body has an inner side surface arranged toward the combustion chamber; as well as A flow guiding and preheating structure is arranged on the inner side of the pot support body, and the flow guiding and preheating structure is used to preheat the secondary air and guide the preheated secondary air to the fire hole of the burner; Wherein, the flow guiding preheating structure comprises a flow guiding matrix and a porous medium member, the flow guiding matrix is ​​connected to the inner side surface of the pot support body, and the porous medium member is arranged on the flow guiding matrix.

2. The pot support according to claim 1, characterized in that: The dimension of the porous medium member in the axial direction of the pot support body is smaller than the dimension of the porous medium member in the radial direction of the pot support body.

3. The pot support according to claim 1, characterized in that: The porosity of the porous medium member is at least 90 percent.

4. The pot support according to claim 1, characterized in that: The flow guide substrate is a plate-shaped member, and at least a portion of the porous medium member is disposed on the bottom surface of the flow guide substrate.

5. The pot support according to claim 4, characterized in that: The flow-conducting substrate is provided with a heat-conducting column extending from the upper side of the flow-conducting substrate to the lower side of the flow-conducting substrate; The bottom end of the heat-conducting column abuts against the porous medium member.

6. The pot support according to claim 5, characterized in that: There are multiple heat-conducting columns, and the multiple heat-conducting columns are arranged at intervals along the circumference of the pot rack body; The bottom end of each of the heat-conducting columns abuts against the porous medium member.

7. The pot support according to claim 5, characterized in that: A heat conduction groove is provided at the top of the porous medium member; The bottom end of the heat-conducting column extends into the heat-conducting groove.

8. The pot support according to claim 4, characterized in that: The projected area of ​​the porous medium member on the surface of the flow guide substrate accounts for at least 90 percent of the surface area of ​​the flow guide substrate.

9. The pot support according to claim 4, characterized in that: The dimension of the porous medium member in the height direction is smaller than the thickness of the flow guide substrate.

10. The pot support according to claim 4, characterized in that: The plate surface of the flow guide base is arranged to be inclined downward in a direction away from the pot support body.

11. The pot support according to any one of claims 1 to 10, characterized in that: The flow guiding preheating structure comprises at least two flow guiding substrates, which are stacked along the height direction of the pot rack, and at least one of which is connected to the pot rack body; A flow guide channel is defined between two adjacent flow guide substrates, the flow guide channel has an air outlet connected to the combustion chamber, and among the two adjacent flow guide substrates constituting the flow guide channel, the flow guide substrate located at the bottom and the inner side surface of the pot support body define an air inlet, and secondary air enters the flow guide channel from the air inlet; Wherein, the porous medium member is arranged in the flow guiding channel.

12. The pot support according to claim 11, characterized in that: There are two flow guide substrates, the upper flow guide substrate is connected to the pot support body, the lower flow guide substrate is connected to the upper flow guide substrate and is spaced apart from the pot support body to form the annular air inlet; or, There are two flow guide bases, both of which are connected to the pot rack body, and the flow guide base located at the bottom has a plurality of air inlets arranged at intervals along the circumference of the pot rack body.

13. The pot support according to claim 12, characterized in that: The guide channel has a first inner wall and a second inner wall which are arranged opposite to each other along the radial direction of the pot support body, and the second inner wall is located on a side closer to the center of the pot support body than the first inner wall; The porous medium member is respectively in contact with the first inner wall and the second inner wall on both sides of the pot support body along the radial direction.

14. The pot support according to claim 12, characterized in that: The extending length of the porous medium member in the circumferential direction of the pot support body is equal to the extending length of the flow guide channel in the circumferential direction.

15. The pot support according to claim 12, characterized in that: At least a portion of the upper wall surface or at least a portion of the lower wall surface of the guide channel is provided with at least one of a guide heat exchange fin, a protrusion structure, a corrugated structure and a preheating spoiler.

16. The pot support according to claim 12, characterized in that: There are multiple air outlets; The plurality of air outlets are arranged at intervals in the circumferential direction of the pot rack body.

17. The pot support according to any one of claims 1 to 10, characterized in that: The flow-guiding matrix extends continuously or intermittently along the circumference of the pot support body; When the flow-guiding matrix continuously extends along the circumferential direction of the pot support body, the flow-guiding matrix is ​​provided with a porous medium member, and the porous medium member is in a closed loop shape in the circumferential direction of the pot support body; When the flow guide matrix extends discontinuously along the circumference of the pot rack body, the flow guide matrix includes a plurality of sub-matrices arranged at intervals along the circumference of the pot rack body, and in the circumference of the pot rack body, the porous medium member is in a closed loop, and the porous medium member extends from the top of one sub-matrix to the bottom of an adjacent sub-matrix in sequence.

18. The pot support according to any one of claims 1 to 10, characterized in that: The porous medium member includes any one of foam metal, metal mesh, metal fiber and zeolite.

19. The pot support according to any one of claims 1 to 10, characterized in that: The porous medium member is fixedly connected to the flow-guiding substrate.

20. The pot support according to any one of claims 1 to 10, characterized in that: The flow guide base and the pot support body are an integrated structure.

21. The pot support according to any one of claims 1 to 10, characterized in that: The pot rack body comprises a top plate and a bottom plate connected together in an up-and-down direction, wherein the top plate and the bottom plate enclose a heat-insulating cavity; The flow guiding substrate is connected to the top plate or the bottom plate.

22. The pot support according to claim 21, characterized in that: The flow guide base and the top plate are an integral component, or; The flow guide base and the bottom plate are an integral component.

23. A cooking appliance, characterized in that: include: Burner; and The pot support according to any one of claims 1 to 22, wherein the pot support body is arranged around the burner, and the pot support body is located above the burner; Wherein, when projected along the axial direction of the pot support body, the projection of the diversion preheating structure on the burner does not cover the fire holes of the outermost circle of the burner.

Images