Pot rack and stove

Abstract

The utility model discloses 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 forms a combustion cavity in a surrounding mode, 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 comprises a flow guide base body located in the combustion cavity, and the flow guide base body is used for preheating secondary air and guiding the preheated secondary air to fire holes of the combustor. According to the technical scheme, the combustion efficiency can be improved, so that the cookware is efficiently and effectively heated, the heating efficiency is improved, and the overall heat efficiency of the cooker is improved.

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] At present, kitchen stoves on the market are equipped with pot racks, which can support the pots.

[0003] In the related art, the burner is arranged inside the pot support, and when the kitchen stove is used, secondary air is supplied to the vicinity of the burner through the pot support. However, the thermal efficiency of the kitchen stove in the related art is still not ideal. Utility Model Content

[0004] The embodiments of the present application provide a pot rack and a stove, which can improve the thermal efficiency of the stove.

[0005] In a first aspect, an embodiment of the present application provides a pot stand, comprising:

[0006] 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; and

[0007] The flow guiding and preheating structure is arranged on the inner side of the pot support body and comprises a flow guiding matrix located in the combustion chamber. The flow guiding matrix is ​​used for preheating the secondary air and guiding the preheated secondary air to the fire hole of the burner.

[0008] In one embodiment, the extension direction of the flow guiding matrix from inside to outside is the same as the radial direction of the pot support or is inclined downward relative to the radial direction of the pot support.

[0009] In one embodiment, the extension direction of the flow guide substrate from inside to outside is set at an angle α with the radial direction of the pot support, and the angle α satisfies the relationship: 0°≤α≤60°.

[0010] In one embodiment, the flow guiding substrate is a flat plate structure.

[0011] In one embodiment, there is a height difference between the guide substrate and the top of the pot support body, and the guide substrate and the inner side surface of the pot support body define a smoke retention chamber located above the guide substrate, and the smoke retention chamber is connected to the combustion chamber to block the smoke above the guide substrate.

[0012] In one embodiment, the flow guiding preheating structure further includes a flow guiding heat exchanging component, which is disposed on at least the upper surface or at least the lower surface of the flow guiding substrate to make at least the upper surface or at least the lower surface of the flow guiding substrate uneven.

[0013] In one embodiment, the flow-guiding heat-exchanging component comprises a plurality of flow-guiding heat-exchanging fins, and the plurality of flow-guiding heat-exchanging fins are at least arranged on the lower surface of the flow-guiding base body and are arranged at intervals along the circumference of the pot rack body.

[0014] In one embodiment, the guide heat exchange fins satisfy at least one of the following conditions:

[0015] The flow guiding heat exchanging fins are arranged to extend radially along the pot support body;

[0016] The extension direction of the guide heat exchange fins is arranged at an angle with the radial direction of the pot support body;

[0017] The guide heat exchange fins are arranged at an angle relative to the height direction of the pot rack.

[0018] In one embodiment, the flow-guiding heat-exchanging component comprises a plurality of protrusion structures, and the plurality of protrusion structures are arranged at intervals along the circumference of the pot support body.

[0019] In one embodiment, the flow-guiding heat-exchanging element comprises a corrugated structure, and the corrugated structure is arranged on at least a portion of the surface of the flow-guiding substrate;

[0020] Wherein, the corrugated structure is a radial corrugated structure extending in the radial direction of the pot support body; or,

[0021] The corrugated structure is a circumferential corrugated structure extending along the circumference of the pot support body.

[0022] In one embodiment, the flow guiding and heat exchanging component comprises a preheating spoiler, a vortex channel is formed in the preheating spoiler, and the vortex channel is configured to guide the secondary air flowing through the flow guiding substrate to form a vortex.

[0023] In one embodiment, each of the preheating spoilers includes a plurality of first spoiler members and a plurality of second spoiler members, the plurality of first spoiler members and the plurality of second spoiler members are alternately arranged along the circumference of the pot rack body, and a vortex channel is formed between a first spoiler member and a second spoiler member.

[0024] In one embodiment, the flow guiding and heat exchanging component comprises:

[0025] A porous medium member is arranged on the flow guide substrate.

[0026] In one embodiment, the flow-guiding heat-exchanging element and the flow-guiding base are an integrated component; or,

[0027] The flow-guiding heat-exchanging component and the flow-guiding base are separate components, and at least a portion of the flow-guiding heat-exchanging component is disposed on the lower surface of the flow-guiding base.

[0028] In one embodiment, the diversion preheating structure further includes:

[0029] The radiator is arranged above the flow-guiding substrate and is used for radiating the heat obliquely downward to the flow-guiding substrate.

[0030] In one embodiment, the radiator comprises:

[0031] A connecting plate connected to the pot support body; and

[0032] The radiation plate has two ends connected to the connection plate and the guide substrate respectively, and extends upward from the outside to the inside to radiate the heat downward to the guide substrate.

[0033] In one embodiment, the flow guide matrix extends continuously or intermittently along the circumference of the pot support body.

[0034] In one embodiment, the flow guide substrate is an integral component; and / or,

[0035] The flow guide base and the pot support body are an integrated component.

[0036] In one embodiment, the pot rack body includes a top plate and a bottom plate connected together in an up-and-down direction, and the top plate and the bottom plate enclose a heat-insulating cavity;

[0037] The flow guiding substrate is connected to the top plate or the bottom plate.

[0038] In one embodiment, the flow guide substrate and the top plate are an integral component, or;

[0039] The flow guide base and the bottom plate are an integral component.

[0040] In one embodiment, the flow guiding preheating structure comprises at least two flow guiding substrates, and at least two flow guiding substrates are stacked along the height direction of the pot rack, wherein at least one of the flow guiding substrates is connected to the pot rack body;

[0041] A guide channel is defined between two adjacent guide substrates, and the guide channel has an air outlet connected to the combustion chamber. 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 secondary air enters the guide channel from the air inlet.

[0042] In one embodiment, the number of the guide substrates is two, the guide substrate located at the top is connected to the pot support body, and the guide substrate located at the bottom is connected to the guide substrate located at the top and is spaced apart from the pot support body to form the annular air inlet; or,

[0043] 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.

[0044] In one embodiment, the extension directions of two adjacent flow guiding substrates are parallel; and / or,

[0045] The ends of two adjacent flow guide substrates away from the pot support body are connected, and the connection between the two adjacent flow guide substrates is provided with a plurality of air outlets connecting the flow guide channel and the combustion chamber, and the plurality of air outlets are arranged at intervals along the circumference of the combustion chamber.

[0046] In one embodiment, the flow guiding and preheating structure further includes a flow guiding and heat exchanging component, at least part of which is disposed in the flow guiding channel and is disposed on at least the upper wall surface or at least the lower wall surface of the flow guiding channel;

[0047] Wherein, the flow-guiding heat-exchanging component includes at least one of a plurality of flow-guiding heat-exchanging fins, a plurality of protrusion structures, a corrugated structure, a porous medium component and a preheating spoiler.

[0048] In one embodiment, a bottom heat exchange structure is further included, and the bottom heat exchange structure is connected to the bottom of the pot rack body, so that the bottom of the pot rack body is uneven.

[0049] In one embodiment, the bottom heat exchange structure comprises:

[0050] a fin heat exchanger connected to the bottom of the pot rack body and comprising a plurality of heat exchange fins, wherein the plurality of heat exchange fins are arranged at intervals along the circumference of the pot rack so that the secondary air exchanges heat with the heat exchange fins in the process of entering the combustion chamber from the bottom of the pot rack body;

[0051] Wherein, the extension direction of each of the heat exchange fins is arranged at an angle with the radial direction of the pot support body.

[0052] In one embodiment, each of the heat exchange fins extends from the inside to the outside toward the combustion chamber, and the heat exchange fins are arranged to be inclined relative to the radial direction passing through the heat exchange fins, and the inclination direction of different heat exchange fins is consistent.

[0053] In one embodiment, the bottom heat exchange structure comprises:

[0054] The perforated heat exchanger is arranged at the bottom of the pot rack body and has a plurality of heat exchange holes arranged at intervals along the circumference of the pot rack body. Secondary air can flow into the combustion chamber after heat exchange with the wall of the heat exchange holes.

[0055] In one embodiment, the bottom heat exchange structure comprises:

[0056] The bottom corrugated structure is arranged at the bottom of the pot support body, so that the secondary air enters the combustion chamber after heat exchange with the bottom corrugated structure.

[0057] In one embodiment, the bottom corrugated structure comprises a circumferential bottom corrugated structure, and the circumferential bottom corrugated structure extends continuously or intermittently along the circumference of the pot support body; and / or,

[0058] The bottom corrugated structure comprises a radial bottom corrugated structure, and the radial bottom corrugated structure extends continuously or discontinuously along the radial direction of the pot support body.

[0059] In one embodiment, the bottom heat exchange structure comprises:

[0060] The bottom porous medium member is arranged at the bottom of the pot support body, and the secondary air can flow through the bottom porous medium member and enter the combustion chamber after exchanging heat with the bottom porous medium member.

[0061] In one embodiment, the porosity of the bottom porous medium member is not less than 80%; and / or,

[0062] The bottom porous medium member comprises one of foam metal, metal mesh, metal fiber and zeolite.

[0063] In one embodiment, the bottom heat exchange structure comprises at least one circle of bottom spoilers, and the multiple groups of bottom spoilers in each circle are protrudingly disposed on the bottom of the pot support body and are arranged at intervals along the circumference of the bottom;

[0064] The bottom spoiler includes a first bottom spoiler and a second bottom spoiler, and the first bottom spoiler and the second bottom spoiler are both arranged to be inclined relative to the radial direction of the pot rack body; in any group of the bottom spoilers, the first bottom spoiler and the second bottom spoiler are arranged at an angle and at intervals, and in the radial direction and toward the central axis of the pot rack body, the distance between the first bottom spoiler and the second bottom spoiler gradually increases.

[0065] In one embodiment, the bottom heat exchange structure comprises:

[0066] The protrusion heat exchanger is arranged at the bottom of the pot support body and comprises a plurality of protrusions arranged at intervals, so that the secondary air enters the combustion chamber after heat exchange with the plurality of protrusions.

[0067] In a second aspect, the present application also provides a stove, including:

[0068] A pot stand as described in any one of the above; and

[0069] A burner, at least a portion of which is disposed in the combustion chamber.

[0070] In one embodiment, when projected along the axial direction of the pot support body, the projection of the flow guiding and preheating structure on the burner does not cover the fire holes at the outermost circle of the burner.

[0071] In the embodiment of the present application, a flow guide preheating structure is provided on the inner side of the pot rack body, and the flow guide preheating structure includes a flow guide matrix, which guides the secondary air to the fire hole of the burner, so that the combustion can be more complete, the combustion efficiency can be improved, and the content of harmful gases in the smoke can be reduced. The smoke generated by the combustion can heat the flow guide matrix, and the flow guide matrix and the secondary air can perform heat exchange to preheat the secondary air. The preheated secondary air is mixed with the mixed gas ejected from the fire hole, which improves the combustion efficiency and can form a flame with a higher ignition temperature, so that the pot can be efficiently and effectively heated, the heating efficiency can be improved, and the overall thermal efficiency of the stove can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] 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 the structures shown in these drawings without paying any creative work.

[0073] Figure 1 A schematic diagram of the connection structure between an external cooker and an embodiment of the cooker of the present application;

[0074] Figure 2 for Figure 1 The structural schematic diagram of a stove embodiment shown;

[0075] Figure 3 for Figure 2 The structural schematic diagram of an embodiment of a pot rack shown;

[0076] Figure 4 for Figure 3 A schematic diagram of the top view of the pot rack shown;

[0077] Figure 5 for Figure 4 The schematic diagram of the cross-sectional structure of the pot rack shown is at section AA;

[0078] Figure 6 for Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0079] Figure 7 is a schematic cross-sectional structure diagram of another embodiment of a pot rack;

[0080] Figure 8 for Figure 7 Schematic diagram of the enlarged structure at C in the middle;

[0081] Fig. 9 A schematic diagram of the bottom structure of another embodiment of a pot rack;

[0082] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure at D in the middle;

[0083] Fig.11 It is a structural schematic diagram of an embodiment of a pot rack having a protruding structure;

[0084] Fig.12 for Fig.11 Schematic diagram of the enlarged structure at E in the middle;

[0085] Fig.13 It is a schematic cross-sectional structure diagram of an embodiment of a pot support having a corrugated structure;

[0086] Fig.14 for Fig.13 The enlarged structural diagram at F in the middle;

[0087] Fig.15 A schematic diagram of the bottom structure of an embodiment of a pot rack having a preheating spoiler;

[0088] Fig.16 for Figure 7 Schematic diagram of the exploded structure of the middle pot rack;

[0089] Fig.17 It is a schematic cross-sectional structure diagram of an embodiment of a pot stand having a multi-layer flow-guiding matrix;

[0090] Fig.18 for Fig.17 Schematic diagram of the enlarged structure at G in the middle;

[0091] Fig.19 It is a schematic cross-sectional structure diagram of an embodiment of a pot rack having a radiator;

[0092] Fig. 20 for Fig.19 Schematic diagram of the enlarged structure at H in the middle;

[0093] Fig.21 It is a structural schematic diagram of an embodiment of a pot rack with a fin heat exchanger;

[0094] Fig. 22 for Fig.21 Schematic diagram of the bottom structure of the middle pot rack after removing part of the structure;

[0095] Fig.23 It is a structural schematic diagram of an embodiment of a pot rack having a hole-digging heat exchanger;

[0096] Fig.24 It is a schematic cross-sectional structure diagram of an embodiment of a pot stand having a bottom corrugated structure;

[0097] Fig.25 for Fig.24 Schematic diagram of the bottom structure of the middle pot rack;

[0098] Fig.26 It is a schematic diagram of the bottom structure of the pot rack having a bottom radial corrugated structure;

[0099] Fig. 27 It is a structural schematic diagram of an embodiment of a pot rack having a protruding heat exchanger;

[0100] Fig.28 It is a schematic cross-sectional structure diagram of another embodiment of a pot rack with a protruding heat exchanger;

[0101] Fig.29 It is a schematic cross-sectional structure diagram of another embodiment of a pot rack with a protruding heat exchanger;

[0102] Fig.30 It is a schematic cross-sectional structure diagram of another embodiment of a pot rack with a protruding heat exchanger;

[0103] Fig.31 It is a structural schematic diagram of an embodiment of a pot support having a bottom porous medium member;

[0104] Fig.32 It is a structural schematic diagram of an embodiment of a pot rack having a bottom spoiler;

[0105] Fig.33 for Fig.32 Schematic diagram of the enlarged structure at I in the middle.

[0106] Description of Figure Numbers:

[0107] 1000, stove; 100, pot rack; 10, pot rack body; 10a, combustion chamber; 10b, smoke retention chamber; 10d, heat insulation chamber; 101, top; 102, bottom; 103, inner side; 105, top plate; 106, bottom plate; 11, bottom spoiler; 111, first bottom spoiler; 1111, first inner end; 1112, first outer end; 112, second bottom spoiler; 1121, second inner end; 1122, second outer end; 115, spoiler channel; 12, fin heat exchanger; 121, heat exchange fin; 13, hole heat exchanger; 13a, heat exchange channel; 14, bottom corrugated structure; 141, radial bottom corrugated structure; 142, circumferential bottom corrugated structure; 144, crest; 145, trough; 15, bottom porous medium member ; 16, raised heat exchanger; 161, raised; 163, raised point; 164, raised hull; 165, raised strip; 166, raised column; 20, flow guide preheating structure; 21, flow guide base; 21a, flow guide channel; 21b, air outlet; 21c, air inlet; 22, flow guide heat exchange fin; 22a, air flow channel; 223, fin connector; 23, raised structure; 24, preheating spoiler; 2 41. first spoiler component; 242. second spoiler component; 24a. vortex channel; 25. radial corrugated structure; 29. ​​radiator; 29a. cavity; 291. radiation plate; 292. connecting plate; 50. pot support; 60. supporting leg; 200. burner; 210. outer ring fire cover; 220. inner ring fire cover; 2101. outer fire hole; 2201. inner fire hole; 2000. pot.

[0108] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0109] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0110] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0111] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0112] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0113] Please refer to Figure 1 and Figure 2 On the one hand, an embodiment of the present application provides a stove 1000 . In some embodiments, the stove 1000 includes a pot rack 100 and a burner 200 .

[0114] The burner 200 is usually arranged on a stove (not shown in the figure) and is used to heat the pot 2000. Specifically, the burner 200 is provided with a fire hole, and a mixed gas containing fuel gas and primary air is ejected from the fire hole of the burner 200 and ignited by an ignition device, and flames are formed with the help of secondary air, and these flames can be used to heat the pot 2000. Optionally, the burner 200 may include an outer ring fire cover 210 and an inner ring fire cover 220, and 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, and both the outer fire hole 2101 and the inner fire hole 2201 can eject flames.

[0115] The pot rack 100 is used to be placed on the stove and to support the pot 2000. The pot rack 100 surrounds the outer side of the burner 200 and forms a combustion chamber 10a. The flame generated by the burner 200 during operation can pass through the combustion chamber 10a to contact the bottom of the pot 2000 to heat the pot 2000. Under the surrounding arrangement of the pot rack 100, the heat of the burner 200 is concentrated and transferred toward the pot 2000, preventing the heat from leaking out, so that the heat of the burner 200 can fully act on the pot 2000.

[0116] To further improve the thermal efficiency of the cooker 1000, please refer to Figure 2In some embodiments, the pot support 100 includes a pot support body 10 , pot feet 50 , support legs 60 and a guide preheating structure 20 .

[0117] The pot rack body 10 can separate the high-temperature flame from the external environment, reduce the impact of the external low-temperature airflow on the flame and reduce the loss of combustion heat, and at the same time allow the hot gas to stay at the bottom 102 of the pot rack body 10 for a longer time, thereby improving the combustion efficiency. The pot rack body 10 is arranged in an annular shape, for example, it can be arranged in a circular ring shape, an elliptical ring shape or a square ring shape. The pot rack body 10 can be made of cast iron, enamel or galvanized materials with advantages such as high temperature resistance and good strength. Among them, the pot rack body 10 has an annular top 101 facing the pot and an annular bottom 102 facing the stove, and a combustion chamber 10a that runs through the top 101 and the bottom 102 is formed.

[0118] The pot support leg 50 is arranged at the top 101 of the pot rack body 10, and is used to support the bottom of the pot 2000. Optionally, the pot support leg 50 may be in the shape of an elongated strip, so as to increase the contact area between the pot support leg 50 and the bottom of the pot 2000. The number of the pot support legs 50 may be multiple, and the multiple pot support legs 50 are arranged at intervals along the circumference of the pot rack body 10 at the top 101 of the pot rack body 10 to enhance the stability of the support for the pot 2000, prevent the pot 2000 from sliding or tipping over during the heating process, and reduce the occurrence of accidental injuries. Among them, the pot support leg 50 may be made of a material with high temperature resistance such as cast iron, and the embodiment of the present application is not limited to this.

[0119] The support leg 60 is disposed at the bottom 102 of the pot rack body 10, and is used to be placed on the countertop of the stove and support the pot rack body 10. There are multiple support legs 60, and multiple support legs 60 are connected to the pot rack body 10 at intervals along the circumference of the pot rack 100 to improve the stability of the pot rack body 10.

[0120] Optionally, the connection between the pot support leg 50, the support leg 60 and the pot rack body 10 can be welding or integrally formed. Here, the connection between the pot support leg 50 and the pot rack body 10 and the connection between the support leg 60 and the pot rack body 10 are not specifically limited.

[0121] Please refer to 1 to Figure 3 The pot support body 10 also has an inner side surface 103 disposed toward the combustion chamber 10a, and the flow guiding and preheating structure 20 is connected to the inner side surface 103. Specifically, the flow guiding and preheating structure 20 includes a flow guiding matrix 21, which is used to preheat the secondary air and guide the preheated secondary air to the fire hole of the burner 200. Figure 3 and Figure 4As shown, the guide matrix 21 is located in the combustion chamber 10a and extends in a direction close to or away from the center of the pot support body 10. It can be understood that the guide matrix 21 does not completely block the flame passing through the combustion chamber 10a. The secondary air flows along the bottom 102 and the inner side 103 of the pot support body 10. When it flows to the guide matrix 21, the secondary air flows along the lower surface of the guide matrix 21, so that the guide matrix 21 can guide the secondary air to flow toward the fire hole of the burner 200.

[0122] Exemplarily, the edge of the guide substrate 21 away from the pot rack body 10 is near the outer fire hole 2101, and the secondary air flows along the lower surface of the guide substrate 21 and can be directly guided to the root of the flame ejected from the outer fire hole 2101. The pot rack body 10 has an axial direction perpendicular to its own circumference. In some embodiments, when the pot rack body 10 is installed on the stove, the axial direction of the pot rack body 10 coincides with the height direction. Optionally, along the axial direction of the pot rack body 10, the projection of the guide substrate 21 on the burner 200 does not cover the outermost fire hole (outer fire hole 2101) of the burner 200. In this way, while ensuring that the guide substrate 21 can guide the secondary air to the outer fire hole 2101, it is avoided that the guide substrate 21 blocks the flame, and it is also possible to avoid damage to the guide preheating structure 20 caused by continuous roasting.

[0123] That is to say, in the embodiment of the present application, a guide preheating structure 20 is provided on the inner side surface 103 of the pot rack body 10. The guide preheating structure 20 includes a guide substrate 21. The guide substrate 21 can guide the secondary air to the fire hole of the burner 200. The flame ejected from the fire hole of the burner 200 can be combined with the secondary air more directly, so that the flame burns more fully, the combustion efficiency is improved and the content of harmful gases in the flue gas is reduced.

[0124] There is usually a certain gap between the top 101 of the pot rack body 10 and the pot 2000, and the smoke generated by the combustion can flow along the upper surface of the guide matrix 21 and out through the above gap. Among them, the guide matrix 21 can be made of a material that is resistant to high temperatures and has a high thermal conductivity, such as stainless steel, aluminum alloy, etc. The smoke has a high temperature, and during the flow process, the smoke exchanges heat with the guide matrix 21, thereby increasing the temperature of the guide matrix 21. As a result, the guide matrix 21 can exchange heat with the secondary air below itself and preheat the secondary air before it reaches the fire hole. The preheated secondary air mixes with the mixed gas ejected from the fire hole to form a flame with a higher ignition temperature, which can not only improve the combustion efficiency, but also efficiently and effectively heat the pot 2000, improve the heating efficiency, and thus improve the overall thermal efficiency of the stove 1000.

[0125] Please refer to Figure 5 and Figure 6In some embodiments, the extension direction of the flow guide substrate 21 from the inside to the outside is the same as the radial direction of the pot rack 100. For example, the center of the pot rack 100 coincides with the center of the combustion chamber 10a. When the pot rack 100 is installed on the stove, the direction of the inner edge of the horizontal plane approaching or away from the center of the pot rack 100 is the radial direction of the pot rack 100. That is, in one embodiment, the flow guide substrate 21 is extended in the horizontal direction. While guiding the flow of secondary air, the airflow turning angle is small, and the obstruction to the secondary air is relatively slight, so that the secondary air can reach the fire hole more smoothly. When the burner 200 has multiple layers of fire holes, the secondary air can reach the farther fire holes, making the combustion more complete. In addition, while ensuring the gap between the flow guide substrate 21 and the burner 200, the pot rack 100 of the embodiment of the present application can also make the overall structure of the stove 1000 more compact, saving space and occupying empty volume.

[0126] In some other embodiments not shown, the extension direction of the flow guide substrate 21 from the inside to the outside may also be set at an angle with the radial direction of the pot rack 100. For example, the burner 200 is approximately located below the flow guide substrate 21, and the extension direction of the flow guide substrate 21 is tilted downward relative to the radial direction of the pot rack 100, so that the end of the flow guide substrate 21 close to the center of the pot rack 100 is closer to the fire hole of the burner 200, and the secondary air is guided to the fire hole more quickly and specifically, so that the flame ejected from the fire hole on the burner 200 can be fully burned, so as to improve the combustion efficiency and the heating efficiency of the pot 2000.

[0127] Optionally, the angle between the extension direction of the flow-guiding matrix 21 from the inside to the outside and the radial direction of the pot rack 100 is set to α, and the angle α satisfies the relationship: 0°≤α≤60°. It can be understood that when α is 0°, the extension direction of the flow-guiding matrix 21 is the same as the radial direction of the pot rack 100. At this time, if the radial direction of the pot rack 100 is in the horizontal direction, the extension direction of the flow-guiding matrix 21 is also in the horizontal direction. The beneficial effects brought by it refer to the above-mentioned embodiment, which will not be described in detail here. When 0°<α≤60°, it means that the extension direction of the flow guide substrate 21 from the inside to the outside is inclined relative to the radial direction of the pot rack 100, and if α>60°, the radial inclination of the flow guide substrate 21 relative to the pot rack 100 is too large. On the one hand, the flow guide substrate 21 has a relatively obvious obstruction to the secondary air, which is easy to make the air supply insufficient, and the air flow velocity is easy to increase, the preheating effect is poor, and thus the combustion effect is affected; on the other hand, it may make the processing of the flow guide substrate 21 more difficult, and it is not conducive to the arrangement of the burner 200, resulting in more occupied space. Therefore, in order to ensure the air supply effect and the combustion effect, and at the same time facilitate processing and structural arrangement, the embodiment of the present application limits the angle α to satisfy the relationship: 0°≤α≤60°, and α can be selected from 20°, 25°, 45°, etc.

[0128] Of course, the extension direction of the guide base 21 can also be inclined upward relative to the radial direction of the pot rack 100, which can be suitable for a structure with a higher fire hole position, or for specifically directing the secondary air to a certain part of the flame to improve the combustion efficiency and heating efficiency. The embodiments of the present application are not limited to this.

[0129] Please continue to refer to Figure 5 and Figure 6 In some embodiments of the present application, the flow guide substrate 21 is a flat plate structure. That is to say, the flow guide substrate 21 is arranged in a plate shape and has two relatively flat surfaces. In the embodiments of the present application, when the pot rack 100 is fixed on the stove, the upper surface and the lower surface of the flow guide substrate 21 are relatively flat. It can be imagined that the flat-plate-shaped flow guide substrate 21 extends in the direction close to the center of the pot rack 100. The relatively flat surface and the better degree of extension enable the secondary air to flow more smoothly along the flow guide substrate 21, and the guiding effect is better. Moreover, the relatively simple structure of the flow guide substrate 21 makes its heat conduction more direct and fast. After the flow guide substrate 21 exchanges heat with the flue gas, it can heat up quickly and preheat the secondary air, which has a better preheating effect. In addition, the flat-plate-shaped flow guide substrate 21 is also easy to process, which can reduce the process and improve production efficiency.

[0130] Of course, the flow guide substrate 21 itself may not be flat, but may be configured such that at least one of the upper surface or the lower surface of the flow guide substrate 21 is undulating in the height direction of the pot rack 100. Exemplarily, the lower surface of the flow guide substrate 21 may be undulating in a wavy or sawtooth shape, or a combination of undulating patterns such as arcs and waves. Of course, the upper surface of the flow guide substrate 21 may also be undulating as in the above example. Alternatively, both the upper and lower surfaces of the flow guide substrate 21 are uneven, and both are undulating. The undulating shapes of the upper and lower surfaces may be the same or different, and may be symmetrical or asymmetrical, and the embodiments of the present application do not limit this.

[0131] Compared with a flat guide matrix 21, when a guide matrix 21 with an undulating lower surface is used, the heat exchange area between the secondary air and the guide preheating structure 20 is increased, and the flow condition of the secondary air when flowing under the guide matrix 21 is also more complicated. For example, eddy currents may be generated, which can prolong the residence time of the secondary air to a certain extent and improve the heat exchange efficiency between the guide preheating structure 20 and the secondary air; the guide matrix 21 with an undulating upper surface can increase the heat exchange area between the high-temperature flue gas and the guide preheating structure 20, prolong the residence time of the high-temperature flue gas, and improve the heat exchange efficiency between the guide preheating structure 20 and the high-temperature flue gas, so that the guide preheating structure 20 can be fully heated, and the high-temperature flue gas can fully heat the bottom of the cookware 2000, thereby improving the utilization rate of the heat generated by combustion, improving the heating efficiency, and enabling the guide preheating structure 20 to better heat the secondary air and improve the preheating effect.

[0132] In addition, there are two ways to set the flow-guiding matrix 21 on the inner side surface 103. One is that the flow-guiding matrix 21 extends continuously along the circumference of the pot rack body 10, so that the contact area of ​​the flow-guiding matrix 21 can be increased to increase the preheating area of ​​the secondary air. The other is that the flow-guiding matrix 21 extends intermittently along the circumference of the pot rack body 10. For example, the flow-guiding matrix 21 can be connected with the pot support feet 50 or the support legs 60 in the circumference of the pot rack body 10, which can not only guide the secondary air to the place with a large amount of gas in a targeted manner, but also save materials and reduce costs.

[0133] To further improve the heat exchange efficiency, in some embodiments of the present application, the flow-guiding preheating structure 20 also includes a flow-guiding heat exchange component, which is arranged on at least the upper surface or at least the lower surface of the flow-guiding substrate 21, so that at least the upper surface or at least the lower surface of the flow-guiding substrate 21 is uneven.

[0134] Please refer to Figure 7 and Figure 8 In one embodiment, the flow-guiding heat-exchanging component includes a plurality of flow-guiding heat-exchanging fins 22, which are at least arranged on the lower surface of the flow-guiding substrate 21 and are arranged at intervals along the circumference of the pot rack body 10. Every two adjacent flow-guiding heat-exchanging fins 22 and the flow-guiding substrate 21 define an airflow channel 22a. It can be understood that the airflow in the airflow channel 22a and the flow-guiding preheating structure 20 have a large heat exchange area and can fully exchange heat. The shape of the flow-guiding heat-exchanging fins 22 can be formed into a straight line, an arc, a wave or a fold line. Among them, the flow-guiding heat-exchanging fins 22 with a straight line and an arc shape are more regular in shape, which is convenient for manufacturing and molding, and the flow-guiding heat-exchanging fins 22 with a wave or a fold line shape can increase the heat exchange time between the secondary air and the flow-guiding heat-exchanging fins 22, so as to improve the heat exchange effect of the heat exchange fins 121 on the secondary air. The material of the heat-conducting fins 22 can be copper, aluminum or other metal materials with good thermal conductivity, which is not limited in this embodiment.

[0135] It is understandable that when multiple flow-guiding heat-exchange fins 22 are arranged on the lower surface of the flow-guiding base 21, the secondary air can flow through the airflow channel 22a and exchange heat with the multiple flow-guiding heat-exchange fins 22; when multiple flow-guiding heat-exchange fins 22 are arranged on the upper surface of the flow-guiding base 21, the smoke generated by the combustion can flow through the airflow channel 22a and exchange heat with the multiple flow-guiding heat-exchange fins 22. Thus, the flow-guiding base 21 and the multiple flow-guiding heat-exchange fins 22 cooperate to preheat the secondary air, and guide the preheated secondary air to the fire hole of the burner 200.

[0136] The embodiment of the present application increases the heat exchange area between the secondary air and the guide preheating structure 20 by providing a plurality of guide heat exchange fins 22 on the lower surface of the guide substrate 21, so that the secondary air can be fully preheated, the heating efficiency is improved, and the combustion efficiency and heat utilization rate are further improved, so that the overall thermal efficiency of the stove 1000 is improved. When the guide heat exchange fins 22 are also provided on the upper surface of the guide substrate 21, the heat exchange area between the high-temperature flue gas and the guide preheating structure 20 can be increased, so that the guide preheating structure 20 can be fully heated, and the secondary air can also be fully preheated, further improving the heating efficiency.

[0137] Please refer to Figure 7 In some embodiments, the guide heat exchange fins 22 are arranged to extend radially along the pot frame body 10. Correspondingly, the air flow channel 22a is also arranged to extend radially along the pot frame body 10, so that the guide heat exchange fins 22 can play a combing role on the secondary air flowing through, so that the secondary air can flow to the fire hole more evenly and stably, thereby improving the combustion stability.

[0138] Of course, please refer to Fig. 9 and Fig.10 In some other embodiments, the extension direction of the guide heat exchange fins 22 is set at an angle with the radial direction of the pot rack body 10. For example, the specific value of the angle can be 10 degrees, 20 degrees, 30 degrees, 40 degrees, etc., and this embodiment is not limited to this. Compared with the form in which the guide heat exchange fins 22 extend along the radial direction of the pot rack body 10, this embodiment can increase the length of the guide heat exchange fins 22 by inclining the guide heat exchange fins 22, thereby increasing the path length of the secondary air flowing through the guide heat exchange fins 22, so that the heat exchange area between the secondary air and the guide heat exchange fins 22 is increased, and the heat exchange efficiency between the secondary air and the guide heat exchange fins 22 is effectively improved.

[0139] Furthermore, the guide heat exchange fins 22 are arranged at an angle relative to the height direction of the pot rack 100. Under the condition of the same height, the inclined guide heat exchange fins 22 have a larger heat exchange area with the secondary air, thereby having a higher heat exchange efficiency with the secondary air. In addition, the inclined guide heat exchange fins 22 can also stir the secondary air entering the air flow channel 22a, so that the secondary air can stay for a longer time, further improving the heat exchange efficiency. It can be understood that whether the guide heat exchange fins 22 are arranged along the radial extension of the pot rack body 10 or not, they can also be arranged at an angle relative to the height direction of the pot rack 100, and can have the above-mentioned beneficial effects, which will not be repeated here.

[0140] It should be noted that the height direction of the pot rack 100 in the above embodiment is based on the height direction of the installation environment, for example, the height direction of the pot rack 100 is the same as the gravity direction. The following will continue to be explained based on this standard.

[0141] Please refer to Fig.11 and Fig.12 In another embodiment of the present application, the flow-guiding heat exchange member includes a plurality of protruding structures 23, and the plurality of protruding structures 23 are arranged at intervals along the circumference of the pot support body 10. When the plurality of protruding structures 23 are arranged on the upper surface of the flow-guiding substrate 21, the contact area between the flow-guiding preheating structure 20 and the flue gas is increased, thereby further improving the temperature raising efficiency of the flow-guiding substrate 21 and improving the heating efficiency of the secondary air. When the plurality of protruding structures 23 are arranged on the lower surface of the flow-guiding substrate 21, the heat exchange area between the secondary air and the flow-guiding preheating structure 20 can be further increased, so that the secondary air can be fully preheated, thereby also improving the heating efficiency. It can be understood that the plurality of protruding structures 23 can also be arranged on the upper and lower surfaces of the flow-guiding substrate 21 at the same time, so that the heat exchange area between the high-temperature flue gas and the flow-guiding preheating structure 20 can be increased, so that the flow-guiding preheating structure 20 can be fully heated, and at the same time, the contact area between the flow-guiding preheating structure 20 and the secondary air can be simultaneously increased to further improve the heating efficiency.

[0142] In some structural forms, the raised structure 23 includes at least one of a convex point, a convex hull, a convex strip and a column. Among them, a convex point refers to a single point protruding on the surface, such as a hemispherical shape, usually existing in a smaller size. The convex hull can be a circular convex hull or a square convex hull. The convex strip is a protruding structure extending in a long strip on the surface, having a certain length and width. The column, as the form of the raised structure 23, is a three-dimensional protrusion, specifically a cone or prism. In this way, the raised structure 23 can be set in a regular shape such as the above, so as to facilitate processing and manufacturing. Of course, in other embodiments, the raised structure 23 can also be set to other irregular shapes to achieve the effect of increasing the heat exchange area with the flue gas or the secondary air.

[0143] Please refer to Fig.13 and Fig.14 In one embodiment, the flow-guiding heat exchange component includes a corrugated structure, and the corrugated structure is provided on at least part of the surface of the flow-guiding substrate 21. It can be understood that the upper surface of the flow-guiding substrate 21 may be provided with a corrugated structure, or the lower surface of the flow-guiding substrate 21 may be provided with a corrugated structure. Of course, both the upper surface and the lower surface of the flow-guiding substrate 21 may be provided with a corrugated structure, and this embodiment of the present application is not limited to this. The corrugated structure is undulating relative to other surfaces of the flow-guiding substrate 21. By providing the corrugated structure, the heat exchange area between the secondary air or smoke 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, so as to further improve the heating efficiency of the cookware 2000.

[0144] The corrugated structure may be a radial corrugated structure 25 extending in the radial direction of the pot support body 10, the troughs and crests of the corrugated structure are distributed in the radial direction of the pot support body 10, and the extension direction of each trough and crest is along the circumference of the pot support body 10. Alternatively, the corrugated structure may also be a circumferential corrugated structure provided on the surface of the flow guide substrate 21 and extending in the circumference of the pot support body 10, the troughs and crests of the corrugated structure are distributed in the circumference of the pot support body 10, and the extension direction of each trough and crest is along the radial direction of the pot support body 10. In actual production and manufacturing, the extension direction of the corrugated structure may be adaptively selected according to the process difficulty and manufacturing cost. No limitation is made here.

[0145] Combined with reference Fig.15 In this embodiment, the flow-guiding heat-exchanging component includes a preheating spoiler 24, which is arranged on at least the lower surface or at least the upper surface of the flow-guiding substrate 21. A vortex channel 24a is formed in the preheating spoiler 24, and the vortex channel 24a is configured to guide the secondary air flowing through the flow-guiding substrate 21 to form a vortex.

[0146] When the preheating spoiler 24 is arranged on the upper surface of the guide substrate 21, the contact area between the guide preheating structure 20 and the smoke is increased, and the smoke will form a vortex when passing through the vortex channel 24a of the preheating spoiler 24, disturbing the flow direction of the smoke, prolonging the residence time of the smoke in the guide preheating structure 20, and achieving a better heat exchange effect and more heat recovery. When the preheating spoiler 24 is arranged on the lower surface of the guide substrate 21, the heat exchange area between the secondary air and the guide preheating structure 20 can be further increased, so that the secondary air can be fully preheated. When the secondary air passes through the vortex channel 24a of the preheating spoiler 24, a vortex is formed, disturbing the flow direction of the secondary air, prolonging the residence time of the secondary air in the guide preheating structure 20, and achieving a better heat exchange effect and more heat recovery.

[0147] Of course, preheating spoilers 24 may also be provided on both the upper and lower surfaces of the guide substrate 21, so that the guide preheating structure 20 can be fully heated and the contact area between the guide preheating structure 20 and the secondary air can be increased simultaneously to further improve the heating efficiency.

[0148] In some structural forms, each preheating spoiler 24 includes a first spoiler component 241 and a second spoiler component 242. When multiple preheating spoilers 24 are arranged along the circumference of the pot rack body 10, multiple first spoiler components 241 and multiple second spoiler components 242 are alternately arranged along the circumference of the pot rack body 10, and a vortex channel 24a is formed between a first spoiler component 241 and a second spoiler component 242.

[0149] 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.

[0150] Exemplarily, the first spoiler 241 and the second spoiler 242 are in the shape of a flat sheet, so as to facilitate manufacturing. 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 provided with an "eight" shape on the lower surface of the guide substrate 21.

[0151] In some embodiments, the flow-guiding heat exchange component includes a porous medium component, and the porous medium component can be selected as a heat-conducting medium with holes such as foam copper, zeolite, metal mesh or metal fiber. The porous medium component has a certain amount of heat through heat exchange, and its porous structure is also convenient for heat storage. The porous medium component is arranged on the lower surface of the flow-guiding substrate 21, and can exchange heat with the flow-guiding substrate 21. The secondary air can pass through the holes of the porous medium component and exchange heat with the porous medium component. The heat exchange is relatively sufficient, so that the secondary air can be fully preheated. Of course, the porous medium component can also be arranged on the upper surface of the flow-guiding substrate 21 to increase the heat exchange area between the flow-guiding preheating structure 20 and the high-temperature flue gas.

[0152] It should be noted that the form of the flow-guiding heat exchange component can be one of the above embodiments, or it can be a combination of two, three or even more embodiments, and the embodiments of the present application will not be described in detail here. Thus, in the embodiment of the present application, when the flow-guiding heat exchange component is arranged on the lower surface of the flow-guiding substrate 21, 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, the heating efficiency can be improved, and the combustion efficiency and heat utilization rate can be further improved. When the flow-guiding heat exchange component is also arranged on the upper surface of the flow-guiding substrate 21, the heat exchange area between the high-temperature flue gas and the flow-guiding preheating structure 20 can be increased, so that the flow-guiding preheating structure 20 can be fully heated, and the high-temperature flue gas can fully heat the bottom of the pot, further improving the heating efficiency, so that the overall thermal efficiency of the stove 1000 is improved.

[0153] Among them, the flow-guiding heat-exchanging component and the flow-guiding base 21 are an integral component. For example, the flow-guiding heat-exchanging fins 22, the protruding structure 23, the corrugated structure or the preheating spoiler 24 can be integrally cast with the flow-guiding base 21, or, after the flow-guiding base 21 is formed, the flow-guiding heat-exchanging fins 22, the protruding structure 23, the corrugated structure or the preheating spoiler 24 are formed by stretching, stamping and other methods. The integrated flow-guiding base 21 and the flow-guiding heat-exchanging component have good structural integrity, and make the pot rack 100 have good thermal conductivity consistency as a whole. In this way, the manufacturing process of the pot rack 100 is also relatively simple, further improving the processing efficiency of the pot rack 100 provided in this embodiment.

[0154] In other possible structural forms, the flow-guiding heat exchange component and the flow-guiding base 21 are separate components. The flow-guiding heat exchange fins 22, the protruding structure 23, the corrugated structure, the preheating spoiler 24 and the porous medium component can be connected to the flow-guiding base 21 by bonding, welding and the like. Among them, the flow-guiding preheating structure can also be provided with an intermediate connecting piece, and the flow-guiding heat exchange fins 22, the protruding structure 23, the corrugated structure, the preheating spoiler 24 and the porous medium component are connected to the intermediate connecting piece, and then the intermediate connecting piece is connected to the flow-guiding base 21 to facilitate assembly and improve production efficiency. For example, please refer to Figure 7 , Figure 8 as well as Fig.16 , the flow-guiding preheating structure 20 also includes a fin connector 223, and the fin connector 223 and the flow-guiding base 21 are separate components. That is to say, the flow-guiding base 21 and the fin connector 223 are respectively formed by two different substrates, and after the flow-guiding base 21 and the fin connector 223 are processed respectively, the two parts are connected together. The fin connector 223 serves as a connection basis for a plurality of flow-guiding heat-exchange fins 22, and it is at least arranged on the lower surface of the flow-guiding base 21, and a plurality of flow-guiding heat-exchange fins 22 are connected to the side of the fin connector 223 away from the flow-guiding base 21. For example, the fin connector 223 is connected to the lower surface of the flow-guiding base 21, and a plurality of flow-guiding heat-exchange fins 22 are arranged below the fin connector 223. It can be understood that by providing the fin connector 223, the flow-guiding base 21 and the plurality of flow-guiding heat-exchanging fins 22 can be formed separately, thereby reducing the difficulty of processing, and the plurality of flow-guiding heat-exchanging fins 22 can be installed in place at one time by connecting the fin connector 223 to the flow-guiding base 21, thereby improving the assembly efficiency. Furthermore, the plurality of flow-guiding heat-exchanging fins 22 and the fin connector 223 are an integral component. For example, the plurality of flow-guiding heat-exchanging fins 22 and the fin connector 223 can be cast together to improve the processing efficiency and structural integrity.

[0155] Further, with respect to the connection method between the flow guide base 21 and the pot rack body 10, the flow guide base 21 and the pot rack body 10 can be an integrated component. The integrated component here can be understood as an integrated connection method between the pot rack body 10 and the flow guide base 21. For example, the flow guide preheating structure 20 is formed at the position of the inner side surface 103 of the pot rack body 10 by stamping, stretching, bending and other processes to improve processing efficiency and structural integrity.

[0156] In an optional embodiment, the flow guide substrate 21 and the pot rack body 10 are an integral structure, and the flow guide substrate 21 and the preheating spoiler 24 are an integral structure. In this way, the manufacturing process of the pot rack 100 is relatively simple, and it is only necessary to form the flow guide substrate 21 on the same substrate and form the preheating spoiler 24 on the flow guide substrate 21. In this way, the processing efficiency of the pot rack 100 provided in this embodiment can be further improved, and the structural integrity can be improved, so that the pot rack 100 as a whole has good thermal conductivity consistency.

[0157] It should be noted that the one-piece connection method used for the diversion preheating structure 20 and the diversion preheating structure 20 and the pot rack body 10 is not limited to the above-mentioned molding method. Other molding methods can also be used in other embodiments, and the embodiments of the present application do not make specific restrictions here.

[0158] Reference Figure 6 and Fig.16 In some structural forms, the pot rack body 10 includes a top plate 105 and a bottom plate 106 connected together in the up-down direction, the top plate 105 and the bottom plate 106 enclose a heat-insulating cavity 10d, and the flow-guiding substrate 21 is connected to the top plate 105 or the bottom plate 106. Optionally, the top plate 105 is roughly an inverted annular disk structure, and the bottom plate 106 is also annular and arched downward in the height direction. The edge of the top plate 105 and the edge of the bottom plate 106 are connected so that the top plate 105 and the bottom plate 106 enclose a heat-insulating cavity 10d. Among them, the top plate 105 and the bottom plate 106 can be connected by interference fit, which is simple and convenient. Alternatively, the top plate 105 and the bottom plate 106 are both made of metal materials and are connected together by welding, so that the connection between the top plate 105 and the bottom plate 106 is more reliable, and the pot rack body 10 has a higher structural strength. The heat-insulating chamber 10d is also arranged in an annular shape, which can block the heat generated by combustion from radiating outward to a certain extent, thereby improving the heat utilization rate. In addition, a plurality of heat-insulating chambers 10d arranged in a stacked manner can be formed in the pot rack body 10, so as to further improve the heat utilization rate.

[0159] Furthermore, the flow guide base 21 can be an integral component with the top plate 105. When the flow guide base 21 and the top plate 105 are an integral component, a substrate is first formed into the main structure of the top plate 105 and the flow guide base 21 by stamping or stretching, and further a protruding structure can be formed on the flow guide base 21. Alternatively, the flow guide base 21 can also be an integral component with the bottom plate 106, which is not limited in this embodiment.

[0160] The above explanation is made on the basis that the flow guiding substrate 21 is a single-layer structure.

[0161] For other structural forms, please refer to Fig.17 and Fig.18 In some embodiments, the flow guiding preheating structure 20 includes at least two flow guiding substrates 21, which are stacked along the height direction of the pot stand 100, and at least one of the flow guiding substrates 21 is connected to the pot stand body 10. A flow guiding channel 21a is defined between each two adjacent flow guiding substrates 21, and among the two adjacent flow guiding substrates 21 constituting the flow guiding channel 21a, the flow guiding substrate 21 located at the bottom and the inner side surface 103 of the pot stand body 10 define an air inlet 21c, and the secondary air enters the flow guiding channel 21a from the air inlet 21c, and flows to the fire hole of the burner 200 through the flow guiding channel 21a.

[0162] Taking two guide substrates 21 as an example, both guide substrates 21 can be connected to the pot rack body 10. Among them, the guide substrate 21 located at the bottom is provided with a plurality of air inlets 21c, or the guide substrate 21 located at the bottom and the inner side surface 103 of the pot rack body 10 define a plurality of air inlets 21c, and the plurality of air inlets 21c are arranged at intervals along the circumference of the pot rack body 10, so that the secondary air in the circumference of the pot rack body 10 can enter the guide channel 21a and be preheated. Exemplarily, in the case where the pot rack body 10 includes a top plate 105 and a bottom plate 106, the upper guide substrate 21 is connected to the top plate 105, and the lower guide substrate 21 is connected to the bottom plate 106. In this case, a plurality of openings can be provided in the lower guide substrate 21 so that the secondary air can flow into the guide channel 21a. In this embodiment, the two guide substrates 21 can be integrally formed with the pot rack body 10 to improve processing efficiency.

[0163] In another embodiment, one of the flow guide substrates 21 is connected to the pot rack body 10, and the remaining flow guide substrates 21 are sequentially connected above or below the previous flow guide substrate 21. Still taking two flow guide substrates 21 as an example, the flow guide substrate 21 located at the top is connected to the pot rack body 10, and the flow guide substrate 21 located at the bottom is connected to the flow guide substrate 21 located at the top, and is spaced apart from the pot rack body 10 to form an annular air inlet 21c. In this way, secondary air can flow into the flow guide channel 21a through the air inlet 21c defined between the lower flow guide substrate 21 and the pot rack body 10. In this embodiment, the two flow guide substrates 21 can be an integral structure and connected to the pot rack body 10.

[0164] In this way, the guide preheating structure 20 of the embodiment of the present application forms a guide channel 21a through at least two guide substrates 21. When the secondary air flows through the guide channel 21a, it can simultaneously exchange heat with at least two guide substrates 21, and the heat exchange area is larger, thereby improving the preheating effect, which is conducive to more complete combustion and improved thermal efficiency.

[0165] In such Fig.18 In the embodiment shown, the extension directions of two adjacent flow guide substrates 21 are parallel, and a flow guide channel 21a with a relatively stable flow area is constructed, so that the secondary air can flow through the flow guide channel 21a more smoothly and can be preheated more fully. Of course, the two adjacent flow guide substrates 21a can also be arranged at an angle, so that the flow guide channel 21a is gradually expanded or contracted in the direction close to the combustion chamber 10a, and the embodiment of the present application is not limited to this.

[0166] Optionally, the ends of two adjacent flow guide substrates 21 away from the pot frame body 10 are connected, and a plurality of air outlets 21b are provided at the connection of at least two flow guide substrates 21. The plurality of air outlets 21b are arranged at intervals along the circumference of the pot frame body 10 and connect the flow guide channel 21a and the combustion chamber 10a, so that the secondary air can flow to the fire hole through the air outlets 21b. The plurality of air outlets 21b can comb the outflowing secondary air again, improve the flow uniformity of the secondary air, make the flame combustion effect more uniform, and achieve better heating effect.

[0167] It should be noted that in the aforementioned embodiment, the flow-guiding heat-exchanging component is arranged on at least the upper surface or at least the lower surface of the flow-guiding substrate 21, and for the embodiment of the multi-layer flow-guiding substrate 21, at least part of the flow-guiding heat-exchanging component is arranged in the flow-guiding channel 21a. The flow-guiding heat-exchanging component can be arranged on the upper wall surface of the flow-guiding channel 21a (the lower surface of the upper flow-guiding substrate 21), or on the lower wall surface of the flow-guiding channel 21a (the upper surface of the lower flow-guiding substrate 21), or the flow-guiding heat-exchanging component can connect the upper wall surface of the flow-guiding channel 21a and the lower wall surface of the flow-guiding channel 21a, so that the secondary air flowing through the flow-guiding channel 21a can be fully preheated. Among them, the flow-guiding heat-exchanging component can include at least one of a plurality of flow-guiding heat-exchanging fins 22, a plurality of protruding structures 23, a corrugated structure, a porous medium component and a preheating spoiler 24. The specific introduction of the above structures refers to the aforementioned embodiment, which will not be repeated here.

[0168] For example, the porous medium member is disposed in the flow guiding channel 21a and connected to at least one flow guiding substrate 21. Optionally, when the flow guiding substrate 21 and the porous medium member are made of metal, they can be connected by welding, which is more reliable. Under the heating of the flow guiding substrate 21, the porous medium member can absorb and store a part of the heat. It can be understood that the secondary air can pass through the holes of the porous medium member and exchange heat with the porous medium member, the heat exchange is more sufficient, and the preheating effect is better.

[0169] Please continue to refer to Fig.18 Or refer again Figure 6In one embodiment, along the height direction of the pot stand 100, the flow guide substrate 21 located above has a height difference with the top 101 of the pot stand body 10. Specifically, the flow guide substrate 21 is lower than the top 101 of the pot stand body 10, and the upper surface of the flow guide substrate 21 and the inner side surface 103 of the pot stand body 10 define a smoke retention cavity 10b located above the flow guide substrate 21. The end of the flow guide substrate 21 away from the pot stand body 10 is not blocked, so that the smoke retention cavity 10b is connected with the combustion cavity 10a. When the pot 2000 is placed on the pot stand 10, the gap between the pot 2000 and the top 101 of the pot stand body 10 is connected with the smoke retention cavity 10b. In this way, the smoke generated by the combustion can flow out from the smoke retention cavity 10b through the gap between the pot 2000 and the top 101 of the pot stand body 10. In this process, the smoke retention cavity 10b is used to block the smoke above the flow-guiding matrix 21. When the smoke escapes, due to the height difference between the flow-guiding matrix 21 and the top 101 of the pot rack body 10, the smoke swirls when flowing to the gap between the pot 2000 and the top 101 of the pot rack body 10, thereby increasing the retention time of the smoke and extending the heat exchange time between the smoke and the bottom of the pot 2000. At the same time, the inner wall surface of the smoke retention cavity 10b (the inner side surface 103 of the pot rack body 10) can also reflect heat to the combustion cavity 10a or the bottom of the pot 2000, thereby further improving the heating efficiency and the heat utilization rate.

[0170] Please refer to Fig.19 and Fig. 20 In some embodiments, the flow guiding preheating structure 20 further includes a radiator 29. The radiator 29 is disposed above the flow guiding substrate 21, and is used to radiate heat obliquely downward to the flow guiding substrate 21. The shape of the radiator 29 may be a plate, a block, or the like, which is not limited here. The radiator 29 may be a solid structure or a hollow structure, which is not limited here. The material of the radiator 29 may be a metal material with good thermal conductivity, such as copper or aluminum, which is not limited in this embodiment.

[0171] It is understandable that when the radiator 29 is disposed above the flow-guiding substrate 21, the flue gas generated by the combustion can flow through the radiator 29 and exchange heat with the radiator 29. After absorbing heat, the radiator 29 radiates the heat downward to the flow-guiding substrate 21, thereby increasing the temperature of the flow-guiding substrate 21. Alternatively, the radiator 29 can also directly radiate the heat of the flue gas, thereby increasing the temperature of the flow-guiding substrate 21. Thus, the flow-guiding substrate 21 can further preheat the secondary air and guide the preheated secondary air to the fire hole of the burner 200.

[0172] Please refer to Fig. 20In some embodiments, the radiator 29 includes a connecting plate 292 and a radiating plate 291. Optionally, the connecting plate 292 and the radiating plate 291 are plate structures, which are easy to manufacture and save materials. In addition, the plate structure also has a good flow-guiding effect, so that the smoke has less resistance when it flows through the connecting plate 292, thereby reducing the smoke exhaust resistance. One end of the connecting plate 292 is connected to the main body of the pot rack 100, and the other end is connected to the radiating plate 291. Among them, the connection method of the radiator 29 and the guide substrate 21 includes at least one of welding, riveting, screwing, clamping, integrated molding and interference fit, which is not limited here. The connecting plate 292 connects the main body of the pot rack 100 and the radiating plate 291, which can improve the installation strength of the radiating plate 291. Optionally, the connection position between the connecting part and the radiating plate 291 is located in the upper half of the radiating plate 291, thereby improving the stability of the installation of the radiating plate 291. Optionally, the connecting plate 292 is connected to the top 101 of the radiation plate 291 to optimize the installation stability of the radiation plate 291 .

[0173] The radiation plate 291 is connected to the inner side 103 of the flow guide matrix 21 or the main body of the pot rack 100. Since the smoke flows from the inside of the main body of the pot rack 100 to the outside, the radiation plate 291 extends upward from the outside to the inside to radiate the heat downward to the flow guide matrix 21. The radiation plate 291 extends upward from the outside to the inside to block the flow of smoke, so that the radiation plate 291 can fully radiate the heat of the smoke to the flow guide matrix 21, so as to increase the temperature of the flow guide matrix 21, and then increase the preheating temperature of the secondary air.

[0174] In some embodiments, the radiation plate 291, the connecting plate 292 and the inner side surface 103 enclose a cavity 29a for heat insulation. The cavity 29a can prevent the heat of the smoke from being radiated to the outside of the pot rack 100 as much as possible, so as to ensure that the heat of the smoke can be radiated to the guide substrate 21 by the radiation plate 291 as much as possible, further increase the temperature of the guide substrate 21, and then increase the preheating temperature of the secondary air.

[0175] In some embodiments, the pot rack 100 further includes a bottom heat exchange structure, which is connected to the bottom 102 of the pot rack body 10 and is configured to make the bottom 102 of the pot rack body 10 uneven, so as to exchange heat with the secondary air and guide the secondary air to the guide preheating structure 20. It can be understood that when the secondary air flows from the bottom 102 of the pot rack 100 to the guide preheating structure 20, since the bottom 102 of the pot rack body 10 is uneven, relative to the regular bottom surface of the pot rack body 10, the bottom 102 of the pot rack body 10 in this embodiment has a larger heat exchange area, and the secondary air can more fully exchange heat with the bottom 102 of the pot rack body 10 when flowing through the bottom 102 of the pot rack body 10, thereby further improving the preheating effect.

[0176] Please refer to Fig.21 and Fig. 22 In one embodiment, the bottom heat exchange structure includes a fin heat exchanger 12. The fin heat exchanger 12 is connected to the bottom 102 of the pot rack body 10. It is understood that during the operation of the burner 200, the heat radiation generated by the flame will act on the pot rack body 10 surrounding the outside of the burner 200, and indirectly heat the pot rack body 10. Furthermore, the heat on the pot rack body 10 will also exchange heat with the fin heat exchanger 12 in a heat exchange manner to increase the temperature of the fin heat exchanger 12. In the process of the secondary air entering the combustion chamber 10a from the bottom 102 of the pot rack body 10, the secondary air can exchange heat with the heat exchange fins 121 to increase its own temperature, so that the secondary air can be preheated by the heat exchange fins 121 before it flows through the guide preheating structure 20.

[0177] The fin heat exchanger 12 includes a plurality of heat exchange fins 121, so that the secondary air exchanges heat with the heat exchange fins 121 in the process of flowing through the bottom 102 of the pot rack body 10. The shape of the heat exchange fins 121 can be formed into a straight line, an arc, a wave or a folded line, wherein the heat exchange fins 121 in the shape of a straight line and an arc are more regular in shape, so as to facilitate manufacturing and forming, and the heat exchange fins 121 in the shape of a wave or a folded line form a bend in the flow path of the secondary air on the heat exchange fins 121, so as to appropriately reduce the flow rate of the secondary air, increase the heat exchange time between the secondary air and the heat exchange fins 121, so as to enhance the heat exchange effect of the heat exchange fins 121 on the secondary air. In addition, the material of the heat exchange fins 121 can be a metal material with better thermal conductivity such as copper and aluminum, and this embodiment does not limit this.

[0178] In actual use, both the outer ring fire cover and the inner ring fire cover of the burner 200 are arranged in a circular ring shape, and the multiple fire outlet holes on the outer ring fire cover and the inner ring fire cover are arranged at intervals along the circumference, so the secondary air will flow in at various positions along the circumference of the pot rack 100 to correspond to the positions of the multiple fire outlet holes. Based on this, in this embodiment, the multiple heat exchange fins 121 are arranged at intervals along the circumference of the pot rack 100, so that the secondary air at various positions along the circumference of the pot rack 100 can exchange heat with the heat exchange fins 121, thereby improving the uniformity of the secondary air supplementing the flame of the burner 200.

[0179] See also Fig. 22 , wherein the extension direction of each heat exchange fin 121 is set at an angle β with the radial direction of the pot rack body 10. For example, the specific value of the angle β can be 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees or 70 degrees, etc., which is not limited in this embodiment.

[0180] In this embodiment, the heat exchange fins 121 are used to perform heat exchange with the secondary air to preheat the secondary air. In this way, not only can the heat radiated by the flame to the pot rack body 10 be brought back to the combustion chamber 10a through the secondary air to supplement the flame, thereby realizing heat recovery and improving the combustion efficiency of the burner 200 of the stove 1000, but the temperature of the pot rack body 10 can also be reduced by the fin heat exchanger 12, effectively improving the high-temperature ablation phenomenon of the pot rack body 10. At the same time, the supplementary effect of the secondary air on the flame of the burner 200 can be effectively improved, so that the carbon monoxide generated by the burner 200 during operation can be better converted into carbon dioxide, reducing the emission of smoke to ensure the health safety of users.

[0181] In the present embodiment, the extension direction of the heat exchange fins 121 is set at an angle with the radial direction of the pot rack body 10. Compared with the radial extension of the heat exchange fins 121 along the pot rack body 10 in the related art, the present embodiment can increase the length of the heat exchange fins 121 by inclining the heat exchange fins 121, so that when the secondary air flows through the gap between two adjacent heat exchange fins 121, the heat exchange area with the heat exchange fins 121 can be increased, thereby effectively improving the heat exchange efficiency between the secondary air and the heat exchange fins 121.

[0182] Furthermore, in one embodiment, each heat exchange fin 121 extends from the inside to the outside toward the combustion chamber 10a, and the heat exchange fin 121 is tilted relative to the radial direction passing through itself, and the tilting direction is consistent for different heat exchange fins 121, for example, each heat exchange fin 121 can be tilted counterclockwise or clockwise. In this way, compared with the form of different heat exchange fins 121 with inconsistent tilting directions, for example, one of two adjacent heat exchange fins 121 is tilted clockwise and the other is tilted counterclockwise, this embodiment can reduce the occupied area of ​​the two adjacent heat exchange fins 121 at the bottom 102 of the pot rack body 10, improve the utilization rate, increase the number of heat exchange fins 121, thereby increasing the total contact area between the fin heat exchanger 12 and the secondary air, and further improve the preheating effect of the fin heat exchanger 12 on the secondary air. In other embodiments, the tilting directions of different heat exchange fins 121 can be set to be inconsistent, and this embodiment does not limit this.

[0183] Combination Fig.23In another embodiment, the bottom heat exchange structure includes a hole-punched heat exchanger 13. The hole-punched heat exchanger 13 may be arranged in an annular shape, for example, in a circular ring shape, an elliptical ring shape, or a square ring shape, and the material of the hole-punched heat exchanger 13 may be a metal material with good thermal conductivity, such as copper or aluminum, which is not limited in this embodiment. The hole-punched heat exchanger 13 is arranged at the bottom 102 of the pot rack body 10. It can be understood that the burner 200 will indirectly heat the pot rack body 10 during operation, and the heat on the pot rack body 10 will also exchange heat with the hole-punched heat exchanger 13 in a heat exchange manner, thereby increasing the temperature of the hole-punched heat exchanger 13.

[0184] The hole-punched heat exchanger 13 is disposed at the bottom 102 of the pot rack body 10 and can include the following two types: first, the hole-punched heat exchanger 13 is directly connected to the bottom 102 of the pot rack body 10 to realize that the hole-punched heat exchanger 13 is disposed at the bottom 102 of the pot rack body 10; second, the hole-punched heat exchanger 13 is indirectly connected to the pot rack body 10 through an additionally disposed connecting member, and the hole-punched heat exchanger 13 can be located at the bottom 102 of the pot rack body 10, so that the hole-punched heat exchanger 13 can also be disposed at the bottom 102 of the pot rack body 10, and this embodiment does not impose any limitation on this.

[0185] The hole-drilled heat exchanger 13 has a heat exchange hole 13a, wherein the secondary air can flow into the combustion chamber 10a after heat exchange with the wall surface of the heat exchange hole 13a.

[0186] Among them, the heat exchange channel 13a is in a straight line shape, and the straight line channel design can make the flow path of the secondary air more direct and simple. Of course, in other embodiments, the heat exchange channel 13a can also be in an arc shape, and the arc-shaped heat exchange channel 13a can increase the turbulence of the secondary air, so that the secondary air contacts the wall of the heat exchange channel 13a more frequently, so as to increase the heat exchange between the secondary air and the wall of the heat exchange channel 13a, thereby enhancing the heat exchange efficiency of the two.

[0187] The flow cross-sectional shape of the heat exchange channel 13a includes a circle, an ellipse, a square, a rhombus, a triangle or a strip, so that the fluid cross-sectional shape of the heat exchange channel 13a is relatively regular, which is convenient for the workshop to manufacture the heat exchange channel 13a.

[0188] In this embodiment, heat is exchanged with the secondary air through the heat exchange channel 13a to preheat the secondary air, and the heat radiated by the flame to the pot rack body 10 is brought back to the combustion chamber 10a through the secondary air to supplement the flame, thereby realizing heat recovery and improving the combustion efficiency of the burner 200 of the stove 1000; the temperature of the pot rack body 10 is reduced by the perforated heat exchanger 13, and the high-temperature ablation phenomenon of the pot rack body 10 is effectively improved; furthermore, the supplementary effect of the secondary air on the flame of the burner 200 can be effectively improved, so as to further improve the combustion efficiency and ensure the user's health safety.

[0189] Please refer to Figure 24 to Figure 26 In another embodiment of the present application, the bottom heat exchange structure further includes a bottom corrugated structure 14. The material of the bottom corrugated structure 14 can be a metal material with good thermal conductivity such as copper and aluminum, and this embodiment does not limit this. In the process of secondary air entering the combustion chamber 10a from the bottom 102 of the pot rack body 10, the secondary air can exchange heat with the bottom corrugated structure 14 to increase its own temperature, so that the secondary air can be preheated by the bottom corrugated structure 14.

[0190] Among them, the specific arrangement forms of the bottom corrugated structure 14 being arranged at the bottom 102 of the pot frame body 10 may include the following three: the first, the bottom corrugated structure 14 is directly connected to the bottom 102 of the pot frame body 10, so as to realize that the bottom corrugated structure 14 is arranged at the bottom 102 of the pot frame body 10; the second, the bottom corrugated structure 14 is formed at the bottom 102 of the pot frame body 10, so as to realize that the bottom corrugated structure 14 is arranged at the bottom 102 of the pot frame body 10; the third, the bottom corrugated structure 14 is indirectly connected to the pot frame body 10 through an additionally arranged connecting member, and the bottom corrugated structure 14 is located at the bottom 102 of the pot frame body 10, so that the bottom corrugated structure 14 can also be arranged at the bottom 102 of the pot frame body 10, and this embodiment does not limit this.

[0191] It is understandable that the bottom corrugated structure 14 may fluctuate or bend due to its own characteristics. For example, the bottom corrugated structure 14 may include crests 144, troughs 145, or both crests 144 and troughs 145 due to its own characteristics, wherein the crests 144 may be arc-shaped or V-shaped.

[0192] The present embodiment performs heat exchange with the secondary air through the bottom corrugated structure 14 to preheat the secondary air. The bottom corrugated structure 14 will fluctuate or bend due to its own characteristics. Therefore, when the secondary air flows through the undulating or curved parts of the bottom corrugated structure 14, it is easier for the secondary air to generate eddies. This can increase the residence time of the secondary air at the bottom of the pot rack 100, thereby improving the heat exchange efficiency between the secondary air and the bottom corrugated structure 14, and greatly improving the preheating effect of the pot rack 100 of the present embodiment on the secondary air.

[0193] See also Fig.25 In some structural forms, the bottom corrugated structure 14 includes a circumferential bottom corrugated structure 142, and the circumferential bottom corrugated structure 142 can extend continuously along the circumference of the pot rack body 10. In this way, the secondary air located in different areas of the circumference of the pot rack body 10 can exchange heat with the circumferential bottom corrugated structure 142, thereby increasing the heat exchange area between the secondary air and the circumferential bottom corrugated structure 142, further improving the preheating effect of the bottom corrugated structure 14 on the secondary air, and the temperature of the secondary air located in different areas of the circumference of the pot rack body 10 after being preheated by the circumferential bottom corrugated structure 142 can be close to the same.

[0194] See also Fig.26 In other structural forms, the bottom corrugated structure 14 includes a radial bottom corrugated structure 141, and the radial bottom corrugated structure 141 extends continuously in the radial direction of the pot rack body 10. In this way, when the secondary air flows in the bottom 102 of the pot rack body 10 in the radial direction, it can exchange heat with the radial bottom corrugated structure 141 for a long time, thereby increasing the heat exchange area between the secondary air and the bottom 102 of the pot rack body 10, and further improving the preheating effect of the secondary air.

[0195] Please refer to Fig. 27 In one embodiment, the bottom heat exchange structure further includes a protruding heat exchanger 16. The protruding heat exchanger 16 is disposed at the bottom 102 of the pot rack body 10. When the secondary air enters the combustion chamber 10a from the bottom 102 of the pot rack body 10, the secondary air can exchange heat with the protruding heat exchanger 16 to increase its own temperature. In this way, the secondary air can be preheated by the protruding heat exchanger 16 before it supplements the flame of the burner 200.

[0196] Among them, the specific arrangement forms of the raised heat exchanger 16 arranged at the bottom 102 of the pot rack body 10 can include at least the following two: first, the raised heat exchanger 16 is directly connected to the bottom 102 of the pot rack body 10 to realize that the raised heat exchanger 16 is arranged at the bottom 102 of the pot rack body 10; second, the raised heat exchanger 16 is indirectly connected to the pot rack body 10 through an additionally arranged connecting member, and the raised heat exchanger 16 is arranged at the bottom 102 of the pot rack body 10, which is not limited in this embodiment.

[0197] The protrusion heat exchanger 16 includes a plurality of protrusions 161 , and the plurality of protrusions 161 are arranged at intervals, so that the secondary air enters the combustion chamber 10 a after heat exchange with the plurality of protrusions 161 .

[0198] Please refer to Figures 27 to 30 The protrusion 161 may include a variety of structural forms. As shown in the figure, the protrusion 161 may include at least one of a convex bulge 164, a convex point 163, a convex strip 165 and a convex column 166. Specifically, the protrusion 161 may be any one of the convex bulge 164, the convex point 163, the convex strip 165 or the convex column 166. The protrusion 161 may also be a combination of any two or more of the convex bulge 164, the convex point 163, the convex strip 165 and the convex column 166. This embodiment does not limit this.

[0199] The technical solution of this embodiment performs heat exchange with secondary air through multiple protrusions 161 to preheat the secondary air, improve the combustion efficiency of the burner 200 of the stove 1000, and effectively improve the high-temperature ablation phenomenon of the pot rack body 10. At the same time, it can effectively improve the supplementary effect of the secondary air on the flame of the burner 200, so that the carbon monoxide generated by the burner 200 during operation can be better converted into carbon dioxide, reducing the emission of smoke to ensure the health safety of the user.

[0200] Please refer to Fig.31 In one embodiment, the bottom heat exchange structure includes a bottom porous medium member 15. The bottom porous medium member 15 is disposed at the bottom 102 of the pot support body 10, and the secondary air can flow through the bottom porous medium member 15, so that the bottom porous medium member 15 can fully exchange heat with the secondary air, and the secondary air after heat exchange flows into the combustion chamber 10a.

[0201] The embodiment of the present application sets a bottom porous medium member 15 at the bottom 102 of the pot rack body 10, so that the secondary air is more fully preheated by the bottom porous medium member 15. On the one hand, the residence time of the secondary air in the bottom porous medium member 15 is prolonged, and on the other hand, the heat exchange area between the secondary air and the bottom porous medium member 15 is increased. The secondary air is heated by the bottom porous medium member 15 when passing through the secondary air heat recovery channel, thereby achieving more sufficient preheating of the secondary air, and then bringing the heated secondary air back to the combustion chamber 10a, avoiding a significant reduction in the temperature of the flame of the burner 200, thereby improving the combustion efficiency of the burner 200 and improving the heating efficiency of the cooker 1000 to the cooker 2000.

[0202] In some embodiments, the porosity of the bottom porous medium member 15 is not less than 80%. It can be understood that the porosity of the bottom porous medium member 15 is relatively appropriate. When the secondary air flows through the bottom porous medium member 15, the pressure generated by the bottom porous medium member 15 on the secondary air is relatively small, that is, the pressure loss on the secondary air when flowing in the bottom porous medium member 15 is relatively small, so that the secondary air can exchange heat with the bottom porous medium member 15 through the secondary air heat recovery channel of the bottom porous medium member 15, thereby increasing the heat exchange contact area and improving the heat exchange efficiency.

[0203] If the porosity of the bottom porous medium member 15 is less than 80%, the porosity of the bottom porous medium member 15 is relatively low. When the secondary air flows through the bottom porous medium member 15, not only the heat exchange area between the secondary air and the bottom porous medium member 15 is reduced, and the heat exchange efficiency is reduced, but also the bottom porous medium member 15 has a large wind resistance to the secondary air. The secondary air is subjected to a large pressure loss when flowing in the bottom porous medium member 15, which is not conducive to the rapid replenishment of the secondary air into the combustion chamber 10a.

[0204] In some embodiments, the bottom porous medium member 15 may include one of foam metal, metal mesh, metal fiber, and zeolite. Specifically, foam metal refers to a special metal material containing foam pores, and optionally, the foam metal may be foam copper, which is not specifically limited in the present embodiment; the metal mesh may be a metal plate mesh, that is, a metal plate with various shapes of holes on the surface; the metal fiber refers to a fiber-shaped material with a high metal content and continuous distribution of metal materials and a lateral size of micrometers; and the zeolite refers to a microporous crystalline aluminosilicate material.

[0205] Exemplarily, when the bottom porous medium member 15 is foam metal, foam metal is a new type of multifunctional material with a large number of connected or unconnected holes evenly distributed in a metal matrix, and foam metal has the characteristics of good thermal conductivity, high ductility and high porosity. When the foam metal is arranged at the bottom 102 of the pot rack body 10, the secondary air flows through the foam metal and exchanges heat with the foam metal, thereby increasing the heat exchange area between the secondary air and the foam metal, and the secondary air after heat exchange flows into the combustion chamber 10a, thereby improving the combustion efficiency of the stove 1000.

[0206] When the bottom porous medium member 15 is a metal mesh, that is, the metal mesh can be set at the bottom 102 of the pot rack body 10, and because the metal mesh is made of metal, it has a higher thermal conductivity, and the residual heat on the pot rack body 10 can be transferred to the metal mesh, and the metal mesh preheats the secondary air to improve the utilization rate of the residual heat on the pot rack body 10. Moreover, since the metal mesh is a mesh structure, when the secondary air flows through the metal mesh, the secondary air can fully exchange heat with the metal mesh to increase the heat exchange area between the secondary air and the metal mesh, and the secondary air after heat exchange is introduced into the combustion chamber 10a, so that the secondary air after heat exchange promotes the flame of the burner 200 to fully burn, thereby improving the heating efficiency of the stove 1000.

[0207] Please refer to Fig.32 and Fig.33In one embodiment, the bottom heat exchange structure further includes a bottom spoiler 11. Specifically, the pot rack body 10 is annular and has a central axis Z. When the pot rack 100 is installed on the stove, the central axis Z can be perpendicular to the horizontal plane. The bottom spoiler 11 has at least one circle, and each circle has multiple groups of bottom spoilers 11. In each circle, each group of bottom spoilers 11 is protrudingly arranged on the bottom 102 of the pot rack body 10, and each group of bottom spoilers 11 is arranged at intervals along the circumference of the bottom 102. Each group of bottom spoilers 11 includes a first bottom spoiler 111 and a second bottom spoiler 112 arranged at intervals. The first bottom spoiler 111 and the second bottom spoiler 112 are both arranged obliquely to the radial direction of the pot rack body 10. There is an angle between the first bottom spoiler 111 and the second bottom spoiler 112. The first bottom spoiler 111 has a first inner end 1111 close to the central axis Z of the pot rack body 10 and a first outer end 1112 away from the central axis Z of the pot rack body 10. The second bottom spoiler 112 has a second inner end 1121 close to the central axis Z of the pot rack body 10 and a second outer end 1122 away from the central axis Z of the pot rack body 10. For any group of bottom spoilers 11, in the radial direction of the pot rack body 10 and in the direction toward the central axis Z of the pot rack body 10, the spacing between the first bottom spoiler 111 and the second bottom spoiler 112 gradually increases, the first outer end 1112 and the second outer end 1122 converge toward each other, and the first inner end 1111 and the second outer end 1121 open away from each other, so that the bottom spoiler 11 is in an inwardly opened eight-shaped shape.

[0208] For any circle of bottom spoilers 11, the first bottom spoilers 111 and the second bottom spoilers 112 are alternately distributed in the circumferential direction of the bottom 102, and any first bottom spoiler 111 is located between two adjacent second bottom spoilers 112, and any second bottom spoiler 112 is located between two adjacent first bottom spoilers 111. For any bottom spoiler 11, a spoiler channel 115 is formed between the first bottom spoiler 111 and the second bottom spoiler 112, and the spoiler channel 115 faces the central axis Z of the pot support body 10. When the secondary air flows into the combustion area along the radial direction of the pot support body 10 through the spoiler channel 115, it can be heated by the first bottom spoiler 111 and the second bottom spoiler 112, and the heat on the first bottom spoiler 111 and the second bottom spoiler 112 can be brought back to the combustion area to improve the combustion efficiency.

[0209] In this embodiment, a plurality of groups of figure-eight-shaped bottom spoilers 11 are formed on the bottom 102 of the pot rack body 10 to increase the thermal contact area between the secondary air and the bottom of the pot rack body 10; at the same time, when the secondary air passes through the bottom spoiler 11, a pressure difference is formed between the outer side and the inner side of the figure-eight-shaped bottom spoiler 11, and the secondary air will go from the outer side to the inner spoiler channel 115 to form a vortex that can enhance air disturbance, so that during the air intake process at the bottom of the pot rack body 10, a better heat exchange effect and more heat recovery can be achieved, and the bottom intake air can be fully preheated to improve the combustion efficiency of the stove.

[0210] The above examples show several possible structural forms of the bottom heat exchange structure. It can be understood that the form of the bottom heat exchange structure can be one of the above embodiments, or a combination of two, three or even more embodiments, which will not be described in detail here. By setting up the bottom heat exchange structure, the secondary air can fully exchange heat with the pot rack body 10 through the bottom heat exchange structure when passing through the bottom 102 of the pot rack body 10, thereby achieving a better heat exchange effect and more heat recovery. In addition, in the present application, the secondary air is successively heated by the bottom heat exchange structure and the diversion preheating structure, and can be fully preheated, and has a higher temperature before reaching the fire hole to participate in combustion, thereby improving the combustion efficiency, making the flame burn more fully, reaching a higher ignition temperature, and improving the heating effect on the bottom of the pot 2000, so that the overall thermal efficiency of the pot rack 100 can be further improved.

[0211] The bottom heat exchange structure and the pot rack body 10 can be an integral component. For example, the fin heat exchanger 12, the hole heat exchanger 13, the bottom corrugated structure 14, the protruding heat exchanger 16 or the bottom spoiler 11 can be integrally cast with the pot rack body 10, or, after the pot rack body 10 is formed, the above structure is formed by stretching, stamping, etc. The integrated bottom heat exchange structure and the pot rack body 10 have good structural integrity, and the pot rack 100 as a whole has good thermal conductivity consistency. In this way, the manufacturing process of the pot rack 100 is also relatively simple, further improving the processing efficiency of the pot rack 100 provided in this embodiment.

[0212] In other possible structural forms, the bottom heat exchange structure and the pot rack body 10 can be separate components. The fin heat exchanger 12, the hole heat exchanger 13, the bottom corrugated structure 14, the protruding heat exchanger 16, the bottom porous medium member 15 and the bottom spoiler 11 can be connected to the bottom 102 of the pot rack body 10 by pasting, welding and other methods after molding, so as to facilitate separate molding, reduce processing difficulty and improve production efficiency.

[0213] The above is an explanation of the specific structural example of the pot rack 100 in the embodiment of the present application. It can be understood that since the stove 1000 of the present application adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0214] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0215] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

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; and The flow guiding and preheating structure is arranged on the inner side of the pot support body and comprises a flow guiding matrix located in the combustion chamber. The flow guiding matrix is ​​used for preheating the secondary air and guiding the preheated secondary air to the fire hole of the burner.

2. The pot support according to claim 1, characterized in that: The extending direction of the flow-guiding matrix from inside to outside is the same as the radial direction of the pot support or is inclined downward relative to the radial direction of the pot support.

3. The pot support according to claim 1, characterized in that: The extension direction of the flow-guiding matrix from inside to outside is arranged at an angle α with the radial direction of the pot support, and the angle α satisfies the relationship: 0°≤α≤60°.

4. The pot support according to claim 1, characterized in that: The flow-guiding substrate is a flat plate structure.

5. The pot support according to claim 1, characterized in that: The guide substrate and the top of the pot rack body have a height difference, and the guide substrate and the inner side surface of the pot rack body define a smoke retention cavity located above the guide substrate, and the smoke retention cavity is connected to the combustion cavity to block the smoke above the guide substrate.

6. The pot support according to claim 1, characterized in that: The flow guiding and preheating structure further comprises a flow guiding and heat exchanging component, which is arranged on at least the upper surface or at least the lower surface of the flow guiding substrate, so that at least the upper surface or at least the lower surface of the flow guiding substrate is uneven.

7. The pot support according to claim 6, characterized in that: The flow-guiding heat-exchanging component comprises a plurality of flow-guiding heat-exchanging fins, which are at least arranged on the lower surface of the flow-guiding base body and are arranged at intervals along the circumferential direction of the pot rack body.

8. The pot support according to claim 7, characterized in that: The guide heat exchange fins at least meet one of the following conditions: The flow guiding heat exchanging fins are arranged to extend radially along the pot support body; The extension direction of the guide heat exchange fins is arranged at an angle with the radial direction of the pot support body; The guide heat exchange fins are arranged at an angle relative to the height direction of the pot rack.

9. The pot support according to claim 6, characterized in that: The flow-conducting heat-exchanging component comprises a plurality of protrusion structures, and the plurality of protrusion structures are arranged at intervals along the circumference of the pot support body.

10. The pot support according to claim 6, characterized in that: The flow-guiding heat-exchanging element comprises a corrugated structure, and the corrugated structure is arranged on at least a part of the surface of the flow-guiding substrate; Wherein, the corrugated structure is a radial corrugated structure extending in the radial direction of the pot support body; or, The corrugated structure is a circumferential corrugated structure extending along the circumference of the pot support body.

11. The pot support according to claim 6, characterized in that: The flow guiding and heat exchanging component comprises a preheating spoiler, a vortex channel is formed in the preheating spoiler, and the vortex channel is configured to guide the secondary air flowing through the flow guiding substrate to form a vortex.

12. The pot support according to claim 11, characterized in that: Each of the preheating spoilers includes a plurality of first spoilers and a plurality of second spoilers, the plurality of the first spoilers and the plurality of the second spoilers are alternately arranged along the circumference of the pot rack body, and a vortex channel is formed between a first spoiler and a second spoiler.

13. The pot support according to claim 6, characterized in that: The flow-conducting heat-exchanging component comprises: A porous medium member is arranged on the flow guide substrate.

14. The pot support according to claim 6, characterized in that: The flow-guiding heat-exchanging element and the flow-guiding base are an integrated component; or, The flow-guiding heat-exchanging component and the flow-guiding base are separate components, and at least a portion of the flow-guiding heat-exchanging component is disposed on the lower surface of the flow-guiding base.

15. The pot support according to claim 1, characterized in that: The diversion preheating structure also includes: The radiator is arranged above the flow-guiding substrate and is used for radiating the heat obliquely downward to the flow-guiding substrate.

16. The pot support according to claim 15, characterized in that: The radiator comprises: A connecting plate connected to the pot support body; and The radiation plate has two ends connected to the connection plate and the guide substrate respectively, and extends upward from the outside to the inside to radiate the heat downward to the guide substrate.

17. The pot support according to claim 1, characterized in that: The flow guide matrix extends continuously or intermittently along the circumference of the pot support body.

18. The pot support according to claim 1, characterized in that: The flow guide substrate is an integrated component; and / or, The flow guide base and the pot support body are an integrated component.

19. The pot support according to claim 18, 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.

20. The pot support according to claim 19, 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.

21. The pot support according to any one of claims 1 to 20, 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 guide channel is defined between two adjacent guide substrates, and the guide channel has an air outlet connected to the combustion chamber. 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 secondary air enters the guide channel from the air inlet.

22. The pot support according to claim 21, 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.

23. The pot support according to claim 21, characterized in that: The extension directions of two adjacent flow-guiding substrates are parallel; and / or, The ends of two adjacent flow guide substrates away from the pot support body are connected, and the connection between the two adjacent flow guide substrates is provided with a plurality of air outlets connecting the flow guide channel and the combustion chamber, and the plurality of air outlets are arranged at intervals along the circumference of the combustion chamber.

24. The pot support according to claim 21, characterized in that: The flow guiding and preheating structure further comprises a flow guiding and heat exchanging component, at least part of which is arranged in the flow guiding channel and arranged on at least the upper wall surface or at least the lower wall surface of the flow guiding channel; Wherein, the flow-guiding heat-exchanging component includes at least one of a plurality of flow-guiding heat-exchanging fins, a plurality of protrusion structures, a corrugated structure, a porous medium component and a preheating spoiler.

25. The pot support according to any one of claims 1 to 20, characterized in that: It also includes a bottom heat exchange structure, which is connected to the bottom of the pot rack body to make the bottom of the pot rack body uneven.

26. The pot support according to claim 25, characterized in that: The bottom heat exchange structure comprises: a fin heat exchanger connected to the bottom of the pot rack body and comprising a plurality of heat exchange fins, wherein the plurality of heat exchange fins are arranged at intervals along the circumference of the pot rack so that the secondary air exchanges heat with the heat exchange fins in the process of entering the combustion chamber from the bottom of the pot rack body; Wherein, the extension direction of each of the heat exchange fins is arranged at an angle with the radial direction of the pot rack body.

27. The pot support according to claim 26, characterized in that: Each of the heat exchange fins extends from the inside to the outside toward the combustion chamber. The heat exchange fins are arranged to be inclined relative to the radial direction passing through the heat exchange fins, and the inclination directions of different heat exchange fins are consistent.

28. The pot support according to claim 25, characterized in that: The bottom heat exchange structure comprises: The perforated heat exchanger is arranged at the bottom of the pot rack body and has a plurality of heat exchange holes arranged at intervals along the circumference of the pot rack body. Secondary air can flow into the combustion chamber after heat exchange with the wall of the heat exchange holes.

29. The pot support according to claim 25, characterized in that: The bottom heat exchange structure comprises: The bottom corrugated structure is arranged at the bottom of the pot support body, so that the secondary air enters the combustion chamber after heat exchange with the bottom corrugated structure.

30. The pot support according to claim 29, characterized in that: The bottom corrugated structure comprises a circumferential bottom corrugated structure, and the circumferential bottom corrugated structure extends continuously or intermittently along the circumference of the pot support body; and / or, The bottom corrugated structure comprises a radial bottom corrugated structure, and the radial bottom corrugated structure extends continuously or discontinuously along the radial direction of the pot support body.

31. The pot support according to claim 25, characterized in that: The bottom heat exchange structure comprises: The bottom porous medium member is arranged at the bottom of the pot support body, and the secondary air can flow through the bottom porous medium member and enter the combustion chamber after exchanging heat with the bottom porous medium member.

32. The pot support according to claim 31, characterized in that: The porosity of the bottom porous medium member is not less than 80%; and / or, The bottom porous medium member comprises one of foam metal, metal mesh, metal fiber and zeolite.

33. The pot support according to claim 25, characterized in that: The bottom heat exchange structure comprises at least one circle of bottom spoilers, and the multiple groups of bottom spoilers in each circle are protrudingly arranged on the bottom of the pot support body and arranged at intervals along the circumference of the bottom; The bottom spoiler includes a first bottom spoiler and a second bottom spoiler, and the first bottom spoiler and the second bottom spoiler are both arranged to be inclined relative to the radial direction of the pot rack body; in any group of the bottom spoilers, the first bottom spoiler and the second bottom spoiler are arranged at an angle and at intervals, and in the radial direction and toward the central axis of the pot rack body, the distance between the first bottom spoiler and the second bottom spoiler gradually increases.

34. The pot support according to claim 25, characterized in that: The bottom heat exchange structure comprises: The protrusion heat exchanger is arranged at the bottom of the pot support body and comprises a plurality of protrusions arranged at intervals, so that the secondary air enters the combustion chamber after heat exchange with the plurality of protrusions.

35. A cooking appliance, characterized in that: include: A pot support as claimed in any one of claims 1 to 34; and A burner, at least a portion of which is disposed in the combustion chamber.

36. The cooker according to claim 35, characterized in that: 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 on the outermost circle of the burner.

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