Pot support and cooking appliance

Abstract

Disclosed in the present application are a pot support and a cooking appliance. The pot support comprises a pot support body and a flow guide and preheating structure, wherein the pot support body is in an annular configuration and encloses a burning cavity, the burning cavity is configured to allow the flame of a burner to pass through same, and the pot support body is provided with an inner side face arranged towards the burning cavity; and the flow guide and preheating structure is arranged on the inner side face, is located in the burning cavity, and comprises a flow guide base body and a preheating flow-disturbing member, wherein the flow guide base body is connected to the pot support body, the preheating flow-disturbing member is arranged on at least the lower surface or at least the upper surface of the flow guide base body, and the flow guide base body and the preheating flow-disturbing member are configured to preheat secondary air and guide the preheated secondary air to a flame hole of the burner. A vortex channel is formed in the preheating flow-disturbing member, and the vortex channel is configured to guide flue gas flowing through the flow guide base body or the secondary air to form a vortex.

Description

Pot racks and stovetops

[0001] Related applications

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on February 29, 2024, with application number 2024102294427 and application name “Pot Rack and Cooker”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of stoves, and in particular to a pot rack and a stove. Background Art

[0004] Currently, kitchen stoves typically consist of a burner and a pot stand. The pot stand is located outside the burner and supports the pot. When the burner is operating, primary air mixed with gas is ejected from the burner's flame hole and ignited by the ignition device. Secondary air then flows into the stove's burner to form a flame, which is used to heat the pot placed on the pot stand.

[0005] In the related art, secondary air flows through the pot rack to be replenished near the burner, but the combustion efficiency of the current stove is still not ideal. Summary of the Invention

[0006] The embodiments of the present application provide a pot rack and a stove, which can improve the combustion efficiency of the stove.

[0007] In a first aspect, an embodiment of the present application provides a pot stand, comprising:

[0008] The pot support body is arranged in an annular shape and encloses a combustion chamber, wherein the combustion chamber is used for passing the flame of the burner, and the pot support body has an inner side surface arranged toward the combustion chamber;

[0009] a flow guide and preheating structure, disposed on the inner side surface and located within the combustion chamber, and comprising a flow guide base and a preheating spoiler, the flow guide base being connected to the pot support body, the preheating spoiler being disposed on at least the lower surface or at least the upper surface of the flow guide base, the flow guide base and the preheating spoiler being used to preheat secondary air and guide the preheated secondary air to the fire hole of the burner;

[0010] Wherein, a vortex channel is formed in the preheating spoiler, and the vortex channel is configured to guide the flue gas or the secondary air flowing through the guide substrate to form a vortex.

[0011] In some embodiments, a plurality of vortex channels are provided, and / or the plurality of vortex channels are arranged along the circumference of the pot support body.

[0012] In some embodiments, each of the preheating spoilers includes a first spoiler and a second spoiler, multiple first spoilers and multiple second spoilers are alternately arranged along the circumference of the pot rack body, and / or, a vortex channel is formed between a first spoiler and a second spoiler.

[0013] In some embodiments, the first spoiler and the second spoiler are in the shape of planar sheets.

[0014] In some embodiments, the extending direction of the first spoiler component and the extending direction of the second spoiler component are arranged to form an angle with the radial direction of the pot support body.

[0015] In some embodiments, a plurality of the first spoiler elements and a plurality of the second spoiler elements are provided on the lower surface of the flow guide substrate.

[0016] In some embodiments, in a radial direction of the pot support body and in a direction toward a central axis of the pot support body, a distance between the first spoiler element and the second spoiler element gradually increases.

[0017] In some embodiments, the first spoiler and the second spoiler both extend radially of the pot support body, and / or opposing surfaces of the first spoiler and the second spoiler are one of curved surfaces, wavy surfaces, and serrated surfaces.

[0018] In some embodiments, the diversion preheating structure further includes:

[0019] The flow-spoiler connecting piece and the flow-guiding base are separate components.

[0020] In some embodiments, the spoiler connection member is at least provided on the lower surface or the upper surface of the flow guide base, and the preheating spoiler is connected to a side of the spoiler connection member facing away from the flow guide base.

[0021] In some embodiments, the preheating spoiler further includes a spoiler enclosure connected to a side of the spoiler connection member facing the combustion chamber and arranged along the circumference of the pot support body.

[0022] In some embodiments, the spoiler includes a shielding portion and an opening portion that are alternately arranged in sequence, and the opening portion is used to connect the combustion chamber and the vortex channel.

[0023] In some embodiments, the flow guiding and preheating structure includes at least two flow guiding substrates, and a flow guiding channel is defined between two adjacent flow guiding substrates.

[0024] In some embodiments, at least two of the flow-guiding substrates are stacked along the height direction of the pot support, and at least one of the flow-guiding substrates is connected to the pot support body;

[0025] In some embodiments, the guide channel has an air outlet communicating with the combustion chamber, and / or, of the two adjacent guide bases constituting the guide channel, the guide base located below and the inner side surface of the pot support body define an air inlet and an outlet, and secondary air enters the guide channel through the air inlet;

[0026] Wherein, at least part of the plurality of preheating spoilers are located in the guide channel and are arranged on at least the upper wall surface or at least the lower wall surface of the guide channel so that the guide channel is connected with the vortex channel.

[0027] In some embodiments, there are two flow guide bases, the upper flow guide base is connected to the pot rack body, and the lower flow guide base is connected to the upper flow guide base and is spaced apart from the pot rack body to form the annular air inlet.

[0028] In some embodiments, there are two flow guide bases, both of which are connected to the pot support body, and / or the flow guide base located at the bottom has a plurality of air inlets spaced apart along the circumference of the pot support body.

[0029] In some embodiments, the diversion preheating structure further includes:

[0030] A porous medium member is provided in the flow guiding channel and is connected to or in contact with at least one flow guiding substrate. The porous medium member is configured to allow secondary air to pass through.

[0031] In some embodiments, the flow guide base and the preheating spoiler are an integral component.

[0032] In some embodiments, the flow guide base and the pot support body are an integral component.

[0033] In some embodiments, the pot rack body includes a top plate and a bottom plate connected together in an up-down direction, wherein the top plate and the bottom plate enclose a heat-insulating cavity;

[0034] The flow guide base is connected to the top plate or the bottom plate.

[0035] In some embodiments, the flow guide base and the top plate are an integral component.

[0036] In some embodiments, the flow guide base and the bottom plate are an integral component.

[0037] In some embodiments, the flow guide matrix extends continuously or discontinuously along the circumference of the pot support body.

[0038] In some embodiments, the pot stand further comprises:

[0039] A bottom heat exchange structure is connected to the bottom of the pot rack body and / or is configured to make the bottom of the pot rack body uneven, so as to exchange heat with secondary air and guide the secondary air to the guide preheating structure.

[0040] In some embodiments, the bottom heat exchange structure includes a plurality of bottom spoilers protruding from the bottom of the pot rack body, and the plurality of bottom spoilers are arranged at intervals along the circumference of the pot rack body and are configured to guide the secondary air flowing through the bottom of the pot rack body to form a vortex.

[0041] In some embodiments, the bottom heat exchange structure includes at least one of the following:

[0042] a) a fin heat exchanger, comprising a plurality of bottom heat exchange fins, the plurality of bottom heat exchange fins being arranged at intervals along the circumference of the pot support, so that secondary air exchanges heat with the bottom heat exchange fins during the process of entering the combustion chamber from the bottom of the pot support body, and the extension direction of each bottom heat exchange fin being arranged at an angle to the radial direction of the pot support body;

[0043] b) a perforated heat exchanger having a plurality of heat exchange channels spaced apart along the circumference of the pot support body, wherein the secondary air can exchange heat with the walls of the heat exchange channels and then flow into the combustion chamber;

[0044] c) a protrusion heat exchanger comprising a plurality of protrusions, the plurality of protrusions being arranged at intervals along the circumference of the pot support body;

[0045] d) a bottom corrugated structure, so that secondary air enters the combustion chamber after heat exchange with the bottom corrugated structure;

[0046] e) A bottom porous medium member, through which secondary air can flow and enter the combustion chamber after exchanging heat with the bottom porous medium member.

[0047] In a second aspect, an embodiment of the present application provides a stove, comprising the pot rack and a burner as described above, wherein at least a portion of the burner is disposed in the combustion chamber;

[0048] Among them, when projected along the axial direction of the pot support body, the projection of the diversion preheating structure on the burner does not cover the fire holes in the outermost circle of the burner, and the central axis of the fire holes in the outermost circle is set at an angle to the central axis of the burner, and / or the angle is greater than 0° and less than 60°. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments or exemplary technologies of the present application, the following briefly introduces the drawings required for use in the description of the embodiments or exemplary technologies. 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 any creative work.

[0050] FIG1 is a schematic diagram of the connection structure between an external cookware and an embodiment of the cooker of the present application;

[0051] FIG2 is a schematic structural diagram of an embodiment of the stove shown in FIG1 ;

[0052] FIG3 is a schematic structural diagram of an embodiment of the pot stand shown in FIG2 ;

[0053] FIG4 is a schematic structural diagram of the pot stand embodiment shown in FIG3 from another perspective;

[0054] FIG5 is an enlarged structural diagram of point A in FIG4 ;

[0055] FIG6 is a schematic diagram of the AA cross-sectional structure of an embodiment of the pot stand shown in FIG4 ;

[0056] FIG7 is a structural schematic diagram of the pot stand shown in FIG3 from another perspective;

[0057] FIG8 is a schematic diagram of the exploded structure of the pot stand shown in FIG3 ;

[0058] FIG9 is a schematic structural diagram of another embodiment of the pot stand shown in FIG2 ;

[0059] FIG10 is a schematic cross-sectional view of an embodiment of the pot stand shown in FIG9 ;

[0060] FIG11 is a schematic structural diagram of another embodiment of a pot stand of the present application;

[0061] FIG12 is a schematic structural diagram of another embodiment of a pot stand of the present application;

[0062] FIG13 is a structural schematic diagram of another embodiment of the pot stand of the present application;

[0063] FIG14 is a structural diagram of another embodiment of a pot stand of the present application;

[0064] FIG15 is a schematic structural diagram of the pot rack in FIG14 from another perspective;

[0065] FIG16 is a structural diagram of another embodiment of the pot stand of the present application.

[0066] Explanation of the accompanying figures: 1000, stove; 100, pot rack; 10, pot rack body; 101, top of pot rack body; 102, bottom of pot rack body; 103, inner side; 10a, combustion chamber; 10d, heat insulation chamber; 105, top plate; 106, bottom plate; 11, bottom spoiler; 111, first bottom spoiler; 112, second bottom spoiler; 12, fin heat exchanger; 121, bottom heat exchange fin; 13, hole heat exchanger; 13a, heat exchange channel; 14, bottom corrugated structure; radial corrugated structure 141; circumferential corrugated structure 142; 15, bottom porous medium member; 16, protrusion Heat exchanger; 161, protrusion; 20, diversion preheating structure; 21, diversion base; 211, opening; 24, preheating spoiler; 241, first spoiler; 242, second spoiler; 24a, vortex channel; 244, spoiler enclosure; 2441, opening; 2442, shielding portion; 21a, diversion channel; 21A, air inlet; 29, spoiler connector; 50, pot support; 60, support leg; 200, burner; 210, outer ring fire cover; 220, inner ring fire cover; 2101, outer fire hole; 2201, inner fire hole; 2000, pot.

[0067] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical solutions and advantages of this application clearer, the following part will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0069] When the following description refers to the accompanying 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 merely examples of devices and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0070] In the description of this 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 this application can be understood according to specific circumstances. In addition, in the description of this 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 previous and subsequent associated objects are in an "or" relationship.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0072] 1 and 2 , 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 .

[0073] The burner 200 is typically located on a stovetop (not shown) and is used to heat the cookware 2000. Specifically, the burner 200 is provided with a flame hole. A mixture of gas and primary air is ejected from the flame hole of the burner 200 and ignited by an ignition device. With the help of secondary air, a flame is formed, which can be used to heat the cookware 2000. Optionally, the burner 200 may include an outer ring flame cover 210 and an inner ring flame cover 220. The outer ring flame cover 210 is formed with an outer flame hole 2101, and the inner ring flame cover 220 is formed with an inner flame hole 2201. Both the outer flame hole 2101 and the inner flame hole 2201 can eject flames upward.

[0074] The pot stand 100 is placed on the stovetop and used to support the pot 2000. This prevents the pot 2000 from sliding or tipping over during heating, reduces the risk of accidental injury, and ensures the stability of the cooking process. The pot stand 100 surrounds the burner 200 and forms a combustion chamber 10a. The flame generated by the burner 200 during operation passes through the combustion chamber 10a to contact the bottom of the pot 2000, heating the pot 2000. With the pot stand 100 in place, the heat from the burner 200 is concentrated and transferred toward the pot 2000, preventing heat leakage and allowing the heat from the burner 200 to fully act on the pot 2000.

[0075] To further improve the combustion efficiency of the stove 1000 , referring to FIG. 2 to FIG. 4 , in some embodiments, the pot rack 100 includes a pot rack body 10 , pot legs 50 , support legs 60 , and a diversion preheating structure 20 .

[0076] The pot support body 10 is annular, such as a circular ring, an elliptical ring, or a square ring. The pot support body 10 may be made of a material with advantages such as cast iron, enameled iron, or galvanized steel, which has advantages such as high temperature resistance and excellent strength. The pot support body 10 surrounds the burner 200 and defines the combustion chamber 10a on the inside.

[0077] The pot legs 50 are located at the top 101 of the pot stand body and are used to support the bottom of the pot 2000. Optionally, the pot legs 50 can be elongated to increase the connection area between the pot legs 50 and the bottom of the pot 2000. This enhances the stability of the pot legs 50 in supporting the pot 2000, preventing the pot 2000 from sliding or tipping during heating, reducing the risk of accidental injury, and ensuring a stable cooking process. Furthermore, the pot legs 50 can be made of a high-temperature-resistant material such as cast iron, although this is not a limitation in this embodiment. There can be multiple pot legs 50, each connected to the top 101 of the pot stand body along the circumference of the pot stand body 10. This improves the support provided to the pot 2000 along the circumference of the pot stand body 10.

[0078] The support legs 60 are provided at the bottom 102 of the pot rack body for placement on the countertop of the stove and supporting the pot rack body 10. There are a plurality of support legs 60, which 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.

[0079] Optionally, the connection between the pot support legs 50 and the support legs 60 and the pot rack body 10 can be welding or integrally formed. Here, the connection between the pot support legs 50 and the pot rack body 10 and the connection between the support legs 60 and the pot rack body 10 are not specifically limited.

[0080] Please refer to Figures 3 to 5. The pot rack body 10 has an inner side surface 103 arranged toward the combustion chamber 10a. The guide preheating structure 20 is connected to the inner side surface 103 and is located in the combustion chamber 10a. It is used to preheat the secondary air and guide the preheated secondary air to the fire hole of the burner 200. The fire hole here can be an outer fire hole 2101.

[0081] It should be noted that, when projected along the axial direction of the pot support body 10, the projection of the diversion and preheating structure 20 onto the burner 200 does not overlap the outermost ring of fire holes of the burner 200. The central axis of the outermost ring of fire holes is arranged at an angle with the central axis of the burner 200, and the angle is greater than 0° and less than 60°. This prevents the ejected flame from directly burning the diversion and preheating structure 20, thereby preventing damage to the diversion and preheating structure 20 and extending its service life.

[0082] In the present application, the flow guiding and preheating structure 20 includes a flow guiding base 21 and a preheating spoiler 24 .

[0083] The guide base 21 is connected to the inner side 103 of the pot support body 10 and extends toward the center of the pot support body 10. The guide base 21 can be a plate-shaped structure made of a high-temperature-resistant metal material with high thermal conductivity, such as iron. Secondary air flows through the bottom 102 of the pot support body. The guide base 21 guides the secondary air toward the flame holes and directs the high-temperature smoke generated by the flame away from the combustion chamber 10a.

[0084] By providing a guide base 21 on the inner side surface 103 of the pot stand body 10, the guide base 21 can guide the secondary air to the fire hole of the burner 200. The flame temperature at the fire hole of the burner 200 is relatively high, which can ensure more complete combustion and reduce the content of harmful gases in the flue gas. The flue gas generated by combustion has a relatively high temperature. When the flue gas flows along the upper surface of the guide base 21, it can heat the guide base 21, increasing the temperature of the guide base 21. When the secondary air passes through the lower surface of the guide base 21, the guide base 21 preheats the secondary air. The preheated secondary air mixes with the mixed gas ejected from the fire hole to form a flame with a relatively high ignition temperature, which can effectively and efficiently heat the pot 2000 and improve combustion efficiency.

[0085] In this embodiment, the guide base 21 can be positioned on the inner side 103 in two ways. One approach is to have the guide base 21 extend continuously along the circumference of the pot stand body 10. This increases the contact area of ​​the guide base 21 and thus the area for preheating the secondary air. The other approach is to have the guide base 21 extend intermittently along the circumference of the pot stand body 10. For example, the guide base 21 can be connected to the pot support feet 50 or the support legs 60 along the circumference of the pot stand body 10. This not only allows for targeted guidance of the secondary air to areas with high volumes of air, but also saves material and reduces costs.

[0086] At least the lower surface or at least the upper surface of the flow guide base 21 is provided with a preheating spoiler 24 .

[0087] When the preheating spoiler 24 is arranged on the upper surface of the guide base 21, the contact area between the guide preheating structure 20 and the flue gas is increased, so as to further improve the temperature raising efficiency of the guide base 21, so that the guide base 21 can improve the heating efficiency of the secondary air more quickly, and the flue gas will form a vortex when passing through the vortex channel 24a of the preheating spoiler 24, which disturbs the flow direction of the flue gas and prolongs the residence time of the flue gas in the guide preheating structure 20, thereby achieving a better heat exchange effect and more heat recovery.

[0088] When the preheating spoiler 24 is positioned on the lower surface of the guide base 21, the heat exchange area between the secondary air and the guide and preheating structure 20 is further increased, allowing the secondary air to be fully preheated, thereby improving heating efficiency. Furthermore, when the secondary air passes through the vortex channel 24a of the preheating spoiler 24, it forms a vortex, disrupting the flow direction of the secondary air and extending the secondary air's residence time in the guide and preheating structure 20, achieving better heat exchange and more heat recovery.

[0089] In this way, the preheating spoiler 24 of the present application makes at least the lower surface or at least the upper surface of the guide base 21 uneven. Compared with the solution in which the lower surface or the upper surface of the guide base 21 is flat, it can further improve the heating efficiency of the secondary air and further improve the heat utilization rate, so that the combustion efficiency of the burner 200 of the stove 1000 is improved.

[0090] It can be understood that in one embodiment, preheating spoilers 24 can also be provided on the upper surface and the lower surface of the guide base 21 at the same time, so that the heat exchange area between the high-temperature flue gas and the guide preheating structure 20 can be increased, and the residence time of the flue gas in the guide preheating structure 20 can be prolonged, so that the guide preheating structure 20 is fully heated. At the same time, the contact area between the guide preheating structure 20 and the secondary air can also be increased synchronously, and the residence time of the secondary air in the guide preheating structure 20 can be prolonged, so as to further improve the heating efficiency.

[0091] In one embodiment, the upper or lower surface of the flow guide base 21 may be provided with multiple circles of preheating spoilers 24. For example, the upper or lower surface of the flow guide base 21 may be provided with two, three, or more circles of preheating spoilers 24. Providing multiple circles of preheating spoilers 24 on the upper or lower surface of the flow guide base 21 can better disturb the airflow and achieve a better heat exchange effect than providing only one circle of preheating spoilers 24.

[0092] In some embodiments, the flow guide base 21 and the preheating spoiler 24 are an integral component. For example, the preheating spoiler 24 can be formed on the lower surface of the flow guide base 21 by stamping, stretching, or casting. Such a configuration facilitates the processing and molding of the flow guide preheating structure 20 to improve the production efficiency of the pot rack 100 provided in this embodiment. In addition, the integrated flow guide preheating structure 20 can have better thermal conductivity consistency, avoid heat accumulation, enable the secondary air to be heated evenly, and improve the preheating effect. Similarly, the preheating spoiler 24 can also be formed on the upper surface of the flow guide base 21 by stamping, stretching, or casting. In other embodiments, the preheating spoiler 24 and the flow guide base 21 can also be separately provided, that is, after the flow guide base 21 is formed, the preheating spoiler 24 can be connected to the flow guide base 21 one by one by bonding or welding.

[0093] Furthermore, regarding the connection between the flow-guiding base 21 and the pot support body 10, the flow-guiding base 21 and the pot support body 10 can be an integral component. This integral component can be understood as an integrally formed connection between the pot support body 10 and the flow-guiding base 21. For example, the flow-guiding preheating structure 20 can be formed on the inner side surface 103 of the pot support body 10 through a process such as stamping, stretching, or bending, thereby improving processing efficiency and structural integrity.

[0094] In an alternative embodiment, the flow-guiding base 21 and the pot holder body 10 are integrally formed, and the flow-guiding base 21 and the preheating spoiler 24 are also integrally formed. This simplifies the manufacturing process of the pot holder 100, requiring only the flow-guiding base 21 and the preheating spoiler 24 to be formed on the same substrate. This further improves the processing efficiency of the pot holder 100 provided in this embodiment, enhances structural integrity, and ensures that the pot holder 100 as a whole has good thermal conductivity consistency.

[0095] 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. In other embodiments, other molding methods can also be used. The embodiment of the present application does not make specific restrictions here.

[0096] Referring to Figure 6 , in some structural forms, the pot stand body 10 includes a top plate 105 and a bottom plate 106 connected vertically. The top plate 105 and the bottom plate 106 enclose an insulating cavity 10d, and the flow guide base 21 is connected to the top plate 105 or the bottom plate 106. Optionally, the top plate 105 is configured as a generally inverted circular disk structure, and the bottom plate 106 is similarly configured as a circular ring, arched downward in the vertical direction. The edges of the top plate 105 and the bottom plate 106 are connected to form the insulating cavity 10d. The top plate 105 and the bottom plate 106 can be connected using an interference fit, which is simple and convenient. Alternatively, the top plate 105 and the bottom plate 106 can be both made of metal and connected by welding. This provides a more reliable connection between the top plate 105 and the bottom plate 106, and enhances the structural strength of the pot stand body 10. The heat-insulating cavity 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 cavities 10d arranged in a stacked manner can be formed in the pot rack body 10, so as to further improve the heat utilization rate.

[0097] 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 integrally formed, a substrate is first formed by stamping or stretching to form the main structure of the top plate 105 and the flow guide base 21. Furthermore, 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.

[0098] Referring to Figure 7 , in some structural forms, multiple vortex channels 24a are provided, and the multiple vortex channels 24a are arranged along the circumference of the pot support body 10. It will be understood that both the outer ring fire cover and the inner ring fire cover of the burner 200 are arranged in an annular 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. Therefore, secondary air will flow into various positions along the circumference of the pot support 100 to correspond to the positions of the multiple fire outlet holes. In this embodiment, the multiple vortex channels 24a are provided on the lower surface of the guide base 21 and are spaced along the circumference of the pot support body 10. This allows secondary air at various positions along the circumference of the pot support body 10 to enter the corresponding vortex channels 24a, making the vortex formation of the secondary air more uniform, thereby improving the uniformity of the secondary air's flame replenishment of the burner 200.

[0099] When multiple vortex channels 24a are provided on the upper surface of the guide base 21 and are spaced apart along the circumference of the pot rack body 10, the flue gas at each position along the circumference of the pot rack body 10 can undergo heat exchange, thereby improving the temperature raising efficiency of the guide base 21, so that the guide base 21 can more quickly improve the heating efficiency of the secondary air.

[0100] 8 , in some structural forms, the flow-guiding preheating structure 20 further includes a flow-disturbing connector 29, which is a separate component from the flow-guiding base 21. That is, the flow-guiding base 21 and the flow-disturbing connector 29 are formed from two different substrates, and after the flow-guiding base 21 and the flow-disturbing connector 29 are separately processed, the two parts are connected together.

[0101] The spoiler connector 29 serves as the foundation for the preheating spoiler 24. The spoiler connector 29 is disposed at least on the lower or upper surface of the flow-guiding base 21. A plurality of first spoiler components 241 and a plurality of second spoiler components 242 are connected to the side of the spoiler connector 29 facing away from the flow-guiding base 21. The preheating spoiler 24 is connected to the side of the spoiler connector 29 facing away from the flow-guiding base 21. For example, the spoiler connector 29 is connected to the lower surface of the flow-guiding base 21, and the preheating spoiler 24 is disposed below the spoiler connector 29. The spoiler connector 29 is connected to the upper surface of the flow-guiding base 21, and the preheating spoiler 24 is disposed above the spoiler connector 29. The spoiler connector 29 can be formed from a substrate, which is then cut and bent to form the preheating spoiler 24. This allows for the production of the preheating spoiler 24 and spoiler connector 29 while ensuring structural stability. Alternatively, the spoiler connector 29 and the preheating spoiler 24 can be manufactured separately and then connected by bonding or welding. This embodiment is not limited to this. It can be understood that by providing the spoiler connector 29, the flow guide base 21 and the preheating spoiler 24 can be formed separately, reducing processing difficulty. It can also be connected to the flow guide base 21 to allow the preheating spoiler 24 to be installed in place at one time, improving assembly efficiency.

[0102] With reference to Figures 5, 6, and 8, the preheating spoiler 24 further includes a spoiler panel 244, which is connected to the side of the spoiler connector 29 facing the combustion chamber 10a and is arranged along the circumference of the pot support body 10. The spoiler panel 244 includes a shielding portion 2442 and an opening portion 2441, which are arranged alternately in sequence. The opening portion 2441 is used to connect the combustion chamber 10a and the vortex channel 24a. Through this structural design, the shielding portion 2442 effectively acts as an obstruction, changing the flow path of some secondary air or flue gas. This obstruction can further extend the residence time of the flue gas or secondary air in the vortex channel 24a, thereby achieving more sufficient contact and heat exchange, enhancing the heat exchange effect, allowing more heat to be recovered and utilized, and thus improving the energy efficiency and combustion efficiency of the entire system.

[0103] The above explanation is based on the assumption that the flow guiding substrate 21 is a single-layer structure.

[0104] In other structural forms, referring to Figures 9 and 10 , the diversion preheating structure 20 includes at least two diversion bases 21. The at least two diversion bases 21 are stacked along the height of the pot stand 100, and at least one of the diversion bases 21 is connected to the pot stand body 10. A diversion channel 21a is defined between each pair of adjacent diversion bases 21. Of the two adjacent diversion bases 21 forming this diversion channel 21a, the lower diversion base 21 and the inner side surface 103 of the pot stand body 10 define an air inlet 21A. Secondary air enters the diversion channel 21a from the air inlet 21A and flows through the diversion channel 21a to the flame hole of the burner 200.

[0105] Taking two guide bases 21 as an example, both guide bases 21 can be connected to the pot support body 10. The lower guide base 21 is provided with multiple air inlets 21A, or the lower guide base 21 and the inner side surface 103 of the pot support body 10 define multiple air inlets 21A. The multiple air inlets 21A are spaced apart along the circumference of the pot support body 10, allowing all secondary air around the pot support body 10 to enter the guide channel 21a and be preheated. For example, if the pot support body 10 includes a top plate 105 and a bottom plate 106, the upper guide base 21 is connected to the top plate 105, and the lower guide base 21 is connected to the bottom plate 106. In this case, several openings can be provided in the lower guide base 21 to allow secondary air to flow into the guide channel 21a. In this embodiment, the two guide bases 21 can be integrally molded with the pot support body 10 to improve processing efficiency.

[0106] In another embodiment, one of the guide bases 21 is connected to the pot support body 10, and the remaining guide bases 21 are sequentially connected above or below the previous guide base 21. Still taking two guide bases 21 as an example, the upper guide base 21 is connected to the pot support body 10, and the lower guide base 21 is connected to the upper guide base 21. They are spaced apart from the pot support body 10 to form an annular air inlet 21A. In this way, secondary air can flow into the guide channel 21a through the air inlet 21A defined between the lower guide base 21 and the pot support body 10. In this embodiment, the two guide bases 21 can be integrally structured and connected to the pot support body 10. For example, if the pot support body 10 includes a top plate 105 and a bottom plate 106, the upper guide base 21 is connected to the top plate 105, and the lower guide base 21 is connected to the bottom plate 106. In this case, a plurality of openings can be provided on the lower guide substrate to form air inlets 21A so that secondary air can flow into the guide channel 21a. In this embodiment, the two guide substrates can be integrally formed with the pot rack body 10 to improve processing efficiency.

[0107] The guide preheating structure 20 of the embodiment of the present application forms a guide channel 21a through at least two guide bases 21. When the secondary air flows through the guide channel 21a, it can simultaneously exchange heat with at least two guide bases 21, and the heat exchange area is larger, thereby improving the preheating effect, making the combustion more complete, and improving the combustion efficiency.

[0108] Furthermore, the extension directions of two adjacent flow guide substrates 21 are parallel, forming a flow guide channel 21a with a relatively stable flow area, allowing the secondary air to flow smoothly through the flow guide channel 21a and be more fully preheated. Of course, the two adjacent flow guide substrates 21a can also be arranged at an angle so that the flow guide channel 21a gradually expands or contracts as it approaches the combustion chamber 10a, and this embodiment of the present application is not limited to this.

[0109] It should be noted that in the aforementioned embodiments, the preheating spoiler 24 is disposed on at least the upper surface or at least the lower surface of the guide substrate 21. However, in embodiments of a multi-layer guide substrate 21, at least a portion of the preheating spoiler 24 is located within the guide channel 21a and disposed on at least the upper wall surface or at least the lower wall surface of the guide channel 21a, such that the vortex channel 24a is located within the guide channel 21a. Specifically, in one embodiment, a preheating spoiler 24 can be disposed on the lower surface of the upper guide substrate 21 so as to be located within the guide channel 21a. When the secondary air flows through the guide channel 21a, it can also exchange heat with the preheating spoiler 24, further increasing the heat exchange area and improving the heat exchange efficiency. Alternatively, a preheating spoiler 24 can also be disposed on the upper surface of the lower guide substrate 21, further increasing the heat exchange area between the secondary air in the guide channel 21a and the guide preheating structure 20. In addition, a preheating spoiler 24 can also be provided on the lower surface of the guide base 21 below, which can preheat the secondary air below the guide preheating structure 20 to further increase the heat exchange area between the secondary air in the guide channel 21a and the guide preheating structure 20.

[0110] Optionally, a plurality of air inlets are provided on the lower surface of the guide base 21 at the bottom, and the plurality of air inlets are connected to the guide channel 21a. The plurality of air inlets are arranged at intervals along the circumference of the pot rack body 10, so that secondary air can enter the guide channel 21a through the plurality of air inlets on the lower surface of the guide base 21 at the bottom, so that the secondary air can enter the guide channel 21a more quickly.

[0111] Optionally, the diversion preheating structure 20 also includes a porous medium member (not shown), and the porous medium member may include at least one of the heat-conducting media with pores such as foam metal, metal mesh, metal fiber, zeolite, etc. Specifically, foam metal refers to a special metal material containing foam pores. Optionally, the foam metal may be foam copper, which is not specifically limited in the embodiment of the present application; the metal mesh may be a metal plate mesh, that is, a metal plate with various shapes of holes on the surface. Metal fiber refers to a fiber-shaped material with a high metal content, a continuous distribution of metal materials, and a lateral size of microns. Zeolite refers to a microporous crystalline aluminosilicate material.

[0112] Alternatively, when the heat-conducting substrate and the porous dielectric member are made of metal, welding can be used for reliable connection. When heated by the flow-conducting substrate 21, the porous dielectric member absorbs and stores some of the heat. Consequently, the secondary air can pass through the pores of the porous dielectric member and exchange heat with the porous dielectric member, resulting in more efficient heat exchange and a better preheating effect.

[0113] 5 and 7 , in some structural forms, each preheating spoiler 24 includes a first spoiler 241 and a second spoiler 242. When a plurality of preheating spoilers 24 are arranged along the circumference of the pot rack body 10, a plurality of first spoiler members 241 and a plurality of second spoiler members 242 are alternately arranged along the circumference of the pot rack body 10, and a vortex channel 24a is formed between a first spoiler member 241 and a second spoiler member 242.

[0114] It can be understood that the first spoiler component 241 and the second spoiler component 242 can be the same or different. Compared with forming the vortex channel 24a through a hole-opening process on the preheating spoiler 24, in this embodiment, a vortex channel 24a of a specific shape can be formed by designing the position or shape of the first spoiler component 241 and the second spoiler component 242, which can save the cost of the hole-opening process and facilitate cleaning of the vortex channel 24a to reduce blockage.

[0115] Furthermore, the first and second spoilers 241, 242 are flat, sheet-like in shape, facilitating manufacturing. After installation, the extension directions of the first and second spoilers 241, 242 form an angle with the radial direction of the pot support body 10. This ensures that smoke or secondary air, when passing through the first and second spoilers 241, 242, flows along the first and second spoilers 241, 242, preventing the smoke or secondary air from being discharged directly in the radial direction of the pot support body 10, thereby extending the residence time of the smoke or secondary air on the guide and preheating structure 20.

[0116] In embodiments where multiple first spoilers 241 and multiple second spoilers 242 are disposed on the lower surface of the flow guide base 21, the spacing between the first spoilers 241 and the second spoilers 242 may optionally gradually increase in a radial direction of the pot support body 10 and in a direction toward the central axis of the pot support body 10. Thus, the first spoilers 241 and second spoilers 242 of each preheating spoiler 24 are disposed in an "eight" shape on the lower surface of the flow guide base 21, thereby increasing the thermal contact area between the secondary air and the flow guide preheating structure 20. Furthermore, as the secondary air passes through the vortex channel 24a of the preheating spoiler 24, a pressure differential is generated between the outer and inner sides of the e-shaped preheating spoiler 24, where the inner side refers to the side of the preheating spoiler 24 facing the combustion chamber 10a, and the outer side refers to the side of the preheating spoiler 24 facing the outer circumference of the pot support body 10. The secondary air will flow from the outside to the inner vortex channel 24a to form a vortex that can enhance air disturbance, thereby achieving a better heat exchange effect and more heat recovery in the process of the secondary air passing through the guide preheating structure 20, and then fully preheating the intake air at the bottom, thereby improving the combustion efficiency of the stove 1000.

[0117] Optionally, the first and second spoiler members 241, 242 both extend radially of the pot support body 10, and the opposing surfaces of the first and second spoiler members 241, 242 are one of a curved surface, a wavy surface, and a serrated surface. By configuring the opposing surfaces of the first and second spoiler members 241, 242 in this manner, compared to an embodiment in which the opposing surfaces of the first and second spoiler members 241, 242 are flat, this embodiment can further increase the heat exchange area of ​​the secondary air or flue gas in the vortex channel 24a, extend the residence time of the secondary air or flue gas in the guide preheating structure 20, further improve the heating efficiency of the secondary air, and further enhance the heat utilization rate, thereby improving the combustion efficiency of the burner 200 of the cooker 1000.

[0118] In some embodiments, the pot stand 100 further includes a bottom heat exchange structure connected to the bottom 102 of the pot stand body and configured to render the bottom 102 of the pot stand body uneven, thereby exchanging heat with the secondary air and directing the secondary air toward the flow-guiding preheating structure 20. It will be appreciated that as the secondary air flows from the bottom of the pot stand 100 toward the flow-guiding preheating structure 20, the uneven bottom 102 of the pot stand body provides a larger heat exchange area than the regular bottom surface of the pot stand body 10. As a result, the secondary air can more fully exchange heat with the bottom 102 of the pot stand body as it flows through it, thereby further enhancing the preheating effect.

[0119] The bottom heat exchange structure can be selected in the following forms:

[0120] a. With reference to FIG11 , to increase the heat exchange area, the bottom heat exchange structure can be configured as a fin heat exchanger 12. The fin heat exchanger 12 includes a plurality of bottom heat exchange fins 121, which are arranged at intervals along the circumference of the pot support body 10. The bottom heat exchange fins 121 can be arranged radially along the pot support body 10 or at an angle to the radial direction of the pot support body 10. Arranging the bottom heat exchange fins 121 at an angle to the radial direction of the pot support body 10 allows the bottom heat exchange fins 121 to be tilted to increase their length. This increases the heat exchange area between the secondary air flowing through the gap between two adjacent bottom heat exchange fins 121, thereby effectively improving the heat exchange efficiency between the secondary air and the bottom heat exchange fins 121.

[0121] b. With reference to Figure 12 , the bottom heat exchange structure can also be configured as a perforated heat exchanger 13, defining a plurality of heat exchange channels 13a spaced apart along the circumference of the pot support body 10. Secondary air can exchange heat with the walls of the heat exchange channels 13a before flowing into the combustion chamber 10a. This allows the secondary air to firstly transfer heat radiated from the flame onto the pot support body 10 back into the combustion chamber 10a to replenish the flame, achieving heat recovery and improving the combustion efficiency of the burner 200 of the stove 1000. Furthermore, the perforated heat exchanger 13 can lower the temperature of the pot support body 10, effectively alleviating high-temperature ablation of the pot support body 10. Furthermore, the secondary air's ability to replenish the burner 200 flame is effectively enhanced, effectively converting carbon monoxide generated by the burner 200 during operation into carbon dioxide, reducing smoke emissions and ensuring user safety.

[0122] c. Referring to Figure 13 , the bottom heat exchange structure can also be configured as a protrusion heat exchanger 16. The protrusion heat exchanger 16 includes multiple protrusions 161 spaced apart along the circumference of the pot support body 10. Optionally, the protrusions 161 can be dots or spherical protrusions; this embodiment does not limit the shape of the protrusions 161. These multiple protrusions increase the heat exchange area of ​​the bottom 102 of the pot support body, ensuring sufficient heat exchange when the secondary air flows through the bottom 102.

[0123] d. With reference to Figures 14 and 15 , the bottom heat exchange structure can also be configured as a bottom corrugated structure 14, which can be a radial corrugated structure extending radially along the pot support body 10, or a circumferential corrugated structure extending circumferentially along the pot support body 10. By providing a corrugated structure, not only can the heat radiated from the flame onto the pot support body 10 be brought back to the combustion chamber 10a via secondary air to replenish the flame, achieving heat recovery and improving the combustion efficiency of the burner 200 of the stove 1000, but the bottom corrugated structure 14 can also reduce the temperature of the pot support body 10, effectively alleviating high-temperature ablation of the pot support body 10. Furthermore, the secondary air replenishment effect on the burner 200 flame is effectively enhanced, effectively converting carbon monoxide generated by the burner 200 during operation into carbon dioxide, reducing smoke emissions and ensuring user safety. In addition, the bottom corrugated structure 14 has undulating or curving characteristics. Therefore, when the secondary air flows through the undulating or curving parts of the bottom corrugated structure 14, eddy currents are more likely to be generated in the secondary air. 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 enhancing the preheating effect of the pot rack 100 on the secondary air.

[0124] e. The bottom heat exchange structure can also be a porous dielectric member. This dielectric member can be a porous thermal conductive medium such as copper foam, zeolite, metal mesh, or metal fiber. When heated by the pot holder body 10, the porous dielectric member absorbs and stores some of the heat. Consequently, the secondary air can pass through the pores of the porous dielectric member and exchange heat with it, resulting in a more efficient heat exchange and sufficient preheating of the secondary air.

[0125] Of course, the bottom heat exchange structure can be a single or multiple type. If there are multiple types, it can be a combination of two or three of the above-mentioned situations a, b, c, d, and e. The embodiments of this application will not be described in detail here. In this way, not only can the heat radiated from the flame to the pot rack body 10 be brought back to the combustion chamber 10a through the secondary air to replenish the flame, achieving heat recovery and improving the combustion efficiency of the burner 200 of the stove 1000, but the bottom heat exchange structure can also reduce the temperature of the pot rack body 10, effectively improving the high-temperature ablation phenomenon of the pot rack body 10. At the same time, it can effectively enhance the secondary air's replenishment effect on the burner 200 flame, so that the carbon monoxide generated by the burner 200 during operation can be better converted into carbon dioxide, reducing smoke emissions to ensure the safety of the user.

[0126] In another embodiment, referring to FIG16 , the bottom heat exchange structure includes a plurality of bottom spoilers 11 protruding from the bottom 102 of the pot support body. The plurality of bottom spoilers are spaced apart along the circumference of the pot support body 10 and are configured to guide secondary air flowing through the bottom 102 of the pot support body into a vortex. The bottom spoilers 11 include a first bottom spoiler 111 and a second bottom spoiler 112, each of which is arranged obliquely with respect to the radial direction of the pot support body 10. Within any set of bottom spoilers 11, the first and second bottom spoilers 111, 112 are spaced apart and arranged at an angle. In the radial direction toward the central axis of the pot support body 10, the spacing between the first and second bottom spoilers 111, 112 gradually increases, extending from the outside toward the inside of the pot support body 10. The first and second bottom spoilers 111, 112 form a figure-eight (Figure-eight) shape. In this way, multiple groups of bottom spoilers are formed by protruding from the bottom 102 of the pot rack body, which increases the thermal contact area between the secondary air and the bottom 102 of the pot rack body; at the same time, when the secondary air passes through the eight-shaped bottom spoiler, vortexes are formed, which disturbs the air at the bottom of the pot rack 100, prolongs the residence time, achieves better heat exchange effect and more heat recovery, and can fully preheat the intake air at the bottom, thereby improving the combustion efficiency of the stove 1000.

[0127] The above is an explanation of a specific structural example of the pot rack 100 of 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 about by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0128] 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 "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This 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 orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0129] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A pot rack, wherein: The pot rack comprises: A pot support body is arranged in an annular shape and encloses a combustion chamber, wherein the combustion chamber is used for passing the flame of the burner, and the pot support body has an inner side surface arranged toward the combustion chamber; and a flow guide and preheating structure, disposed on the inner side surface and located within the combustion chamber, and comprising a flow guide base and a preheating spoiler, the flow guide base being connected to the pot support body, the preheating spoiler being disposed on at least the lower surface or at least the upper surface of the flow guide base, the flow guide base and the preheating spoiler being used to preheat secondary air and guide the preheated secondary air to the fire hole of the burner; Wherein, a vortex channel is formed in the preheating spoiler, and the vortex channel is configured to guide the flue gas or the secondary air flowing through the guide substrate to form a vortex.

2. The pot stand according to claim 1, wherein: A plurality of eddy current channels are provided, and the plurality of eddy current channels are arranged along the circumference of the pot support body.

3. The pot stand according to claim 1 or 2, wherein: Each of the preheating spoilers includes a first spoiler and a second spoiler. Multiple first spoilers and multiple 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.

4. The pot stand according to claim 3, wherein: The first spoiler and the second spoiler are in the shape of flat sheets. The extending directions of the first spoiler and the second spoiler form an angle with the radial direction of the pot support body.

5. The pot stand according to claim 3 or 4, wherein: The plurality of first spoilers and the plurality of second spoilers are arranged on the lower surface of the guide base, and the distance between the first spoiler and the second spoiler gradually increases in the radial direction of the pot rack body and toward the central axis of the pot rack body.

6. The pot support according to any one of claims 3 to 5, wherein: The first spoiler component and the second spoiler component both extend in the radial direction of the pot support body, and opposing surfaces of the first spoiler component and the second spoiler component are one of a curved surface, a wavy surface, and a serrated surface.

7. The pot support according to any one of claims 1 to 6, wherein: The diversion preheating structure also includes: The spoiler connector is a separate component from the guide base. The spoiler connector is at least provided on the lower surface or the upper surface of the guide base. The preheating spoiler is connected to the side of the spoiler connector away from the guide base.

8. The pot stand according to claim 7, wherein: The preheating spoiler also includes a spoiler panel, which is connected to the side of the spoiler connector facing the combustion chamber and is arranged along the circumference of the pot support body. The spoiler panel includes a shielding portion and an opening portion that are alternately arranged in sequence, and the opening portion is used to connect the combustion chamber and the vortex channel.

9. The pot support according to any one of claims 1 to 8, wherein: The diversion preheating structure includes: At least two of the flow-guiding bases are stacked along the height direction of the pot support, and at least one of the flow-guiding bases is connected to the pot support body; A guide channel is defined between two adjacent guide bases, the guide channel having an air outlet communicating with the combustion chamber, and an air inlet is defined between the lower guide base and the inner side surface of the pot support body of the two adjacent guide bases constituting the guide channel, and secondary air enters the guide channel from the air inlet; Wherein, at least part of the plurality of preheating spoilers are located in the guide channel and are arranged on at least the upper wall surface or at least the lower wall surface of the guide channel so that the guide channel is connected with the vortex channel.

10. The pot stand according to claim 9, wherein: There are two flow guide bases, the upper flow guide base is connected to the pot support body, and the lower flow guide base is connected to the upper flow guide base and 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 spaced apart along the circumference of the pot rack body.

11. The pot support according to claim 9 or 10, wherein: The diversion preheating structure also includes: A porous medium member is provided in the flow guiding channel and is connected to or in contact with at least one flow guiding substrate. The porous medium member is configured to allow secondary air to pass through.

12. The pot support according to any one of claims 1 to 11, wherein: The flow guide base and the preheating spoiler are an integrated component; and / or, The flow guide base and the pot support body are an integrated component.

13. The pot support according to any one of claims 1 to 12, wherein: The pot rack body includes a top plate and a bottom plate connected together in an up-down direction, wherein the top plate and the bottom plate enclose a heat-insulating cavity; The flow guide base is connected to the top plate or the bottom plate.

14. The pot support according to claim 13, wherein: 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.

15. The pot stand according to any one of claims 1 to 14, wherein: The flow guide base extends continuously or discontinuously along the circumference of the pot support body.

16. The pot support according to any one of claims 1 to 15, wherein: The pot rack also includes: A bottom heat exchange structure is connected to the bottom of the pot rack body and is configured to make the bottom of the pot rack body uneven, so as to exchange heat with secondary air and guide the secondary air to the guide preheating structure.

17. The pot support according to claim 16, wherein: The bottom heat exchange structure includes a plurality of bottom spoilers protruding from the bottom of the pot rack body. The plurality of bottom spoilers are arranged at intervals along the circumference of the pot rack body and are configured to guide the secondary air flowing through the bottom of the pot rack body to form a vortex.

18. The pot support according to claim 16 or 17, wherein: The bottom heat exchange structure includes at least one of the following: a) a fin heat exchanger, comprising a plurality of bottom heat exchange fins, the plurality of bottom heat exchange fins being arranged at intervals along the circumference of the pot support, so that secondary air exchanges heat with the bottom heat exchange fins during the process of entering the combustion chamber from the bottom of the pot support body, and the extension direction of each bottom heat exchange fin being arranged at an angle to the radial direction of the pot support body; b) a perforated heat exchanger having a plurality of heat exchange channels spaced apart along the circumference of the pot support body, wherein the secondary air can exchange heat with the walls of the heat exchange channels and then flow into the combustion chamber; c) a protrusion heat exchanger comprising a plurality of protrusions, wherein the plurality of protrusions are arranged at intervals along the circumference of the pot support body; d) a bottom corrugated structure, so that secondary air enters the combustion chamber after heat exchange with the bottom corrugated structure; e) A bottom porous medium member, through which secondary air can flow and enter the combustion chamber after exchanging heat with the bottom porous medium member.

19. A cooking appliance, wherein: include: The pot support according to any one of claims 1 to 18; and a burner, at least a portion of which is disposed in the combustion chamber; Among them, when projected along the axial direction of the pot support body, the projection of the diversion preheating structure on the burner does not cover the fire holes in the outermost circle of the burner, and the central axis of the fire holes in the outermost circle is set at an angle to the central axis of the burner, and the angle is greater than 0° and less than 60°.

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