Pot rack and stove

Abstract

The pot rack comprises a pot rack main body and a heat absorption layer, the pot rack main 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, the pot rack main body is provided with an inner side face facing the combustion cavity, and the pot rack main body has a first radiation absorption rate; the heat absorption layer is at least arranged on the inner side face, the heat absorption layer has a second radiation absorption rate, and the second radiation absorption rate is larger than the first radiation absorption rate. The absorption capability of the pot rack main body on heat radiation energy generated by the burner can be improved, so that the heat efficiency of the kitchen stove is improved.

Description

Technical Field

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

[0005] In a first aspect, the present application provides a pot rack, comprising:

[0006] A 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, the pot support body has an inner side surface facing the combustion chamber, and the pot support body has a first radiation absorption rate; and

[0007] The heat absorption layer is at least arranged on the inner side surface, and the heat absorption layer has a second radiation absorptivity, and the second radiation absorptivity is greater than the first radiation absorptivity.

[0008] The embodiment of the present application arranges a heat absorption layer on the inner side of the pot rack body, and makes the second radiation absorption rate of the heat absorption layer greater than the first radiation absorption rate of the pot rack body, so as to improve the absorption capacity of the pot rack body to the thermal radiation energy generated by the burner, reduce the loss of heat energy generated by the burner, and thus improve the thermal efficiency of the kitchen stove.

[0009] In combination with the first aspect and the above implementations, in some possible implementations, the heat absorption layer is a coating, and the heat absorption layer is fixed to the inner side surface by coating; or

[0010] The heat absorbing layer is a plate, and the heat absorbing layer is fixed to the inner side surface by means of clamping, welding or threaded connection.

[0011] In combination with the first aspect and the above implementations, in some possible implementations, the pot rack body is a stainless steel piece;

[0012] The heat absorption layer is at least one of a silver layer, a copper layer, a gold layer, an aluminum layer, a black chrome coating, a black nickel coating and a ceramic layer.

[0013] In combination with the first aspect and the above implementations, in some possible implementations, the thickness of the heat absorption layer is not less than 0.2 and not more than 0.5 mm.

[0014] In combination with the first aspect and the above implementations, in some possible implementations, the heat absorption layer does not exceed the top end or the bottom end of the inner side surface along the axial direction of the pot support body.

[0015] In combination with the first aspect and the above implementations, in some possible implementations, the pot rack further includes:

[0016] A flow guiding and preheating structure, arranged on the inner side and extending into the combustion chamber, the flow guiding and preheating structure is used to preheat the secondary air and guide the preheated secondary air to the fire hole of the burner;

[0017] The flow-guiding preheating structure as a whole serves as the heat-absorbing layer, or the heat-absorbing layer is provided on the flow-guiding preheating structure.

[0018] In combination with the first aspect and the above implementations, in some possible implementations, the heat absorption layer is provided on the guide preheating structure, the guide preheating structure has a third radiation absorption rate, and the third radiation absorption rate is greater than the first radiation absorption rate; and / or

[0019] The heat absorption layer has a first thermal conductivity, the flow-conducting preheating structure has a second thermal conductivity, and the first thermal conductivity is greater than the second thermal conductivity.

[0020] In combination with the first aspect and the above implementations, in some possible implementations, the diversion preheating structure includes:

[0021] A flow-guiding substrate is connected to the inner side surface and extends into the combustion chamber, and the heat-absorbing layer is arranged on at least the upper surface or at least the lower surface of the flow-guiding substrate.

[0022] In combination with the first aspect and the above implementations, in some possible implementations, the flow guide substrate divides the inner side surface into an upper inner side surface and a lower inner side surface along the height direction of the pot support body, and at least the upper inner side surface is provided with the heat absorption layer;

[0023] The guide substrate and the upper inner side surface together form an annular smoke retention cavity, and the smoke retention cavity is used to retain the smoke generated by the burner to extend the heat exchange time between the smoke and the bottom of the cookware.

[0024] In combination with the first aspect and the above implementations, in some possible implementations, the diversion preheating structure further includes:

[0025] The flow-guiding heat-exchanging element is disposed on at least the upper surface of the flow-guiding substrate and is at least partially located in the smoke retention cavity, and is configured to make the upper surface of the flow-guiding substrate uneven.

[0026] The heat absorbing layer is disposed on the surface of the flow-guiding heat-exchanging element, or the flow-guiding heat-exchanging element as a whole is a heat absorbing layer, and the heat absorbing layer is used to exchange heat with the smoke in the smoke retention cavity and conduct heat to the flow-guiding substrate.

[0027] In combination with the first aspect and the above implementations, in some possible implementations, the flow-guiding heat-exchanging element is further disposed on the lower surface of the flow-guiding substrate; or,

[0028] The flow-guiding heat-exchanging component on the upper surface of the flow-guiding substrate also penetrates the flow-guiding substrate and extends to the lower surface of the flow-guiding substrate.

[0029] In combination with the first aspect and the above-mentioned implementations, in some possible implementations, the flow-guiding heat-exchanging component includes a plurality of preheating spoilers protruding from the bottom of the pot rack body, and the plurality of preheating spoilers are arranged at intervals along the circumference of the pot rack body on at least the upper surface or at least the lower surface of the flow-guiding substrate.

[0030] In combination with the first aspect and the above implementations, in some possible implementations, the flow guiding and heat exchanging component includes at least one of the following:

[0031] a) a plurality of flow-guiding heat-exchanging fins, which are arranged on the flow-guiding base body at intervals along the circumference of the pot support body;

[0032] b) a plurality of protrusions, arranged at intervals on the flow guide base along the circumference of the pot support body;

[0033] c) a corrugated structure, which is arranged on the flow guide 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 in the circumferential direction of the pot support body;

[0034] d) A porous medium member, disposed on the flow guide substrate and configured to allow secondary air to pass through.

[0035] In combination with the first aspect and the above implementations, in some possible implementations, the flow guiding preheating structure includes at least two flow guiding substrates, one of which is connected to the pot support body and the upper inner side surface defines the smoke retention cavity, and the remaining flow guiding substrates are sequentially connected below the previous flow guiding substrate;

[0036] A flow guiding channel is defined between two adjacent flow guiding substrates, the flow guiding channel is connected to the combustion chamber, and secondary air enters the flow guiding channel from between the flow guiding substrate and the pot support body.

[0037] In combination with the first aspect and the above implementations, in some possible implementations, the pot rack includes a top plate and a bottom plate connected in an up-and-down direction, and the top plate and the bottom plate enclose a heat-insulating cavity;

[0038] 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.

[0039] In a second aspect, the present application further provides a stove, comprising:

[0040] A pot stand as described in any one of the first aspects above; and

[0041] A burner, at least a portion of which is disposed in the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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.

[0043] Figure 1 is a structural schematic diagram of a stove provided by an embodiment of the present application;

[0044] Figure 2 yes Figure 1 A schematic structural diagram of a pot rack in an embodiment of a cooker;

[0045] Figure 3 yes Figure 1 A schematic structural diagram of a pot rack in another embodiment of a cooker;

[0046] Figure 4 yes Figure 3 A first cross-sectional view along line AA in the pot stand;

[0047] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of part I in the pot rack;

[0048] Figure 6 yes Figure 3 A second cross-sectional view along line AA in the pot stand;

[0049] Figure 7 yes Figure 6 A schematic diagram of the enlarged structure of part II in the pot rack;

[0050] Figure 8 yes Figure 1A bottom view of a pot rack in another embodiment of a stove;

[0051] Fig. 9 yes Figure 1 A schematic structural diagram of a pot rack in another embodiment of a cooker;

[0052] Fig.10 yes Figure 3 A third cross-sectional view along line AA in the pot stand;

[0053] Fig.11 yes Figure 8 A schematic diagram of the enlarged structure of local III in the pot rack;

[0054] Fig.12 yes Figure 3 A fourth cross-sectional view along line AA in the pot stand.

[0055] Description of reference numerals:

[0056] 100—pot rack;

[0057] 10—boiler frame body; 10a—combustion chamber; 10b—smoke retention chamber; 10d—insulation chamber; 103—inner side; 105—top plate; 106—bottom plate;

[0058] 20—diversion preheating structure;

[0059] 21—flow guiding matrix; 21a—flow guiding channel;

[0060] 22—flow-guiding heat exchange fins; 23—protrusions; 24—preheating spoiler; 25—radial corrugated structure; 26—circumferential corrugated structure; 27—porous medium member;

[0061] 30—heat absorbing layer;

[0062] 200—Burners. DETAILED DESCRIPTION

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] Kitchen stoves, also known as gas stoves, refer to kitchen appliances that use gas fuel for direct fire heating. At present, kitchen stoves on the market are equipped with pot racks in addition to burners. The pot racks can provide stable support for pots such as iron pots, steamers, and casseroles.

[0068] In the related art, the burner is arranged inside the pot rack, and a gap is reserved between the burner and the pot rack to introduce secondary air around the gas stove. When the kitchen stove is in use, the secondary air will be replenished to the vicinity of the burner through the pot rack. However, the thermal efficiency of the kitchen stove in the related art is still not ideal.

[0069] The inventors have found that part of the heat energy generated by the combustion of gas in the burner is directly radiated to the surrounding environment of the kitchen stove, which reduces the utilization rate of the gas heat energy and causes the thermal efficiency of the kitchen stove to be still less than ideal.

[0070] In order to solve the above technical problems, the present application provides a pot rack and a stove. The pot rack and the stove provided in the present application are described in detail below with reference to the accompanying drawings of the specification.

[0071] See also Figure 1A stove provided in an embodiment of the present application includes a pot rack 100 and a burner 200. The burner 200 is a device that sprays fuel and air in a certain way for mixed combustion, and can be used to heat pots. The burner 200 mentioned in the present application is usually a civilian burner. The burner 200 is mostly made of high-temperature resistant materials such as stainless steel or metal iron, aluminum, etc. The gas fuel burned by the burner 200 can be liquefied petroleum gas, artificial coal gas, natural gas, etc. The pot rack 100 is mounted on the burner 200, so that the burner 200 is located on the inner side of the pot rack 100, which can support the pot.

[0072] See also Figure 2 The pot rack 100 provided in the embodiment of the present application includes a pot rack body 10 and a heat absorption layer 30. The pot rack body 10 is arranged in an annular shape and encloses a combustion chamber 10a. At least part of the burner 200 is arranged in the combustion chamber 10a. The combustion chamber 10a is used for the flame of the burner 200 to pass through. The flame of the combustion chamber 10a can heat the pot placed on the pot rack 100. The annular structure of the pot rack body 10 can be a circular ring, an elliptical ring, a polygonal ring, such as a quadrilateral ring and other annular structures. See Figure 3 The pot rack body 10 has an inner side surface 103 facing the combustion chamber 10a. The pot rack body 10 can adopt a single-layer structure or a double-layer or other multi-layer structure. For the pot rack body 10 with a single-layer structure, it can be formed by a one-time stamping process. For the pot rack body 1 with a double-layer or other multi-layer structure, it can be processed by bonding, welding, hot melting and other processes. It can be understood that during the use of the stove 1000, the top structure of the pot rack body 10 may be contacted. Therefore, in order to avoid the high temperature of the top structure of the pot rack body 10 that burns the user, an insulating cavity 10d can be formed inside the pot rack body 10. The insulating cavity 10d can reduce heat transfer within a certain period of time, so the high temperature of the top structure of the pot rack body 10 can be avoided to a certain extent. See Figure 4 When 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 can enclose and form a heat-insulating cavity 10d. The top plate 105 and the bottom plate 106 can be made of metal parts, and thus can be connected together by welding.

[0073] See also Figure 2 and Figure 3, the heat absorption layer 30 is at least arranged on the inner side surface 103. Considering the material saving of the heat absorption layer 30, when the heat absorption layer 30 is arranged along the axial direction of the pot support body 10, the heat absorption layer 30 does not exceed the top or bottom of the inner side surface 103. For example, the outer contour of the heat absorption layer 30 can be flush with the top or bottom of the inner side surface 103. In addition, under the premise of ensuring that the performance of the heat absorption layer 30 meets the requirements, when the heat absorption layer 30 is arranged, the outer contour of the heat absorption layer 30 can also be kept at a certain distance from the top or bottom of the inner side surface 103. The heat absorption layer 30 can adopt different structural forms. For example, the heat absorption layer 30 can be a coating, and the heat absorption layer 30 using the coating is fixed to the inner side surface 103 by coating; in addition, the heat absorption layer 30 can also be a plate, and the heat absorption layer 30 using the plate is fixed to the inner side surface 103 by clamping, welding or threading.

[0074] The pot rack body 10 has a first radiation absorptivity. The heat absorption layer 30 has a second radiation absorptivity. The second radiation absorptivity of the heat absorption layer 30 is greater than the first radiation absorptivity of the pot rack body 10. Radiation absorptivity refers to the absorption capacity of an object to radiation, which can describe the degree of absorption of radiation energy by an object, that is, the ratio of the radiation energy absorbed by an object per unit area per unit time to the radiation energy transmitted by the air per unit time through the area. Different materials have different absorption capacities for radiation. The pot rack body 10 can be made of stainless steel. For the pot rack body 10 made of stainless steel, the heat absorption layer 30 can be made of at least one of a silver layer, a copper layer, a gold layer, an aluminum layer, a black chrome coating, a black nickel coating and a ceramic layer with relatively higher radiation absorptivity. In order to make the heat absorption layer 30 effectively absorb the heat radiation of the burner 200, play a good heat transfer role, and have good adhesion, so that the heat absorption layer 30 is tightly combined with the surface of the pot support body 10, the thickness of the heat absorption layer 30 can be set to be not less than 0.2mm and not more than 0.5mm. For example, the thickness of the heat absorption layer 30 can be 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc.

[0075] The embodiment of the present application provides a heat absorption layer 30 on the inner side surface 103 of the pot rack body 10, and makes the second radiation absorption rate of the heat absorption layer 30 greater than the first radiation absorption rate of the pot rack body 10, so as to improve the absorption capacity of the pot rack body 10 for the thermal radiation energy generated by the burner 200, reduce the loss of heat energy generated by the burner 200, and thus improve the thermal efficiency of the kitchen stove.

[0076] Please continue to see Figure 3In some embodiments of the present application, the pot support 100 may further include a guide preheating structure 20, which is disposed on the inner side 103 and extends into the combustion chamber 10a. The guide preheating structure 20 is used to preheat the secondary air and guide the preheated secondary air to the fire hole of the burner 200. The preheated secondary air can be more fully burned with the gas in the fire hole of the burner 200, which is conducive to improving the combustion efficiency of the gas.

[0077] It should be noted that in the embodiment of the present application, the flow-guiding preheating structure 20 can be used as a heat-absorbing layer 30 as a whole, or a heat-absorbing layer 30 can be provided on the flow-guiding preheating structure 20. When the heat-absorbing layer 30 is provided on the flow-guiding preheating structure 20, the flow-guiding preheating structure 20 has a third radiation absorptivity, and the third radiation absorptivity is greater than the first radiation absorptivity. Since the third radiation absorptivity of the heat-absorbing layer 30 is greater than the first radiation absorptivity of the pot rack body 10. Therefore, the absorption capacity of the pot rack body 10 to the thermal radiation energy generated by the burner 200 can be improved, and the thermal efficiency of the kitchen stove can be improved. In addition, the heat-absorbing layer 30 has a first thermal conductivity coefficient, and the flow-guiding preheating structure 20 has a second thermal conductivity coefficient, and the first thermal conductivity coefficient is greater than the second thermal conductivity coefficient. Among them, the thermal conductivity coefficient, also known as thermal conductivity, is a physical quantity that measures the thermal conductivity of a material. Materials with high thermal conductivity coefficients have excellent thermal conductivity. For example, the diversion preheating structure 20 can be made of austenitic stainless steel (such as 304, 316, etc.), and its thermal conductivity is approximately in the range of 16 to 24W / (m·K). The heat absorption layer 30 can be a silver layer, a copper layer, a gold layer, an aluminum layer, a black chrome coating, a black nickel coating, and a ceramic layer. Among them, the thermal conductivity of the silver layer is 429W / (m·K), the thermal conductivity of the copper layer is 385W / (m·K), the thermal conductivity of the gold layer is 316.2W / (m·K), and the thermal conductivity of the aluminum layer is 205W / (m·K). Black chrome coating, black nickel coating and ceramic layer are also high thermal conductivity materials that are currently widely used, and the thermal conductivity is usually greater than 200W / (m·K). For specific high thermal conductivity ceramic materials, such as polycrystalline diamond ceramics, the thermal conductivity can even reach 2000 / (m·K). That is to say, by selecting suitable materials so that the thermal conductivity of the heat absorption layer 30 is greater than the thermal conductivity of the flow-guiding preheating structure 20, the thermal radiation energy absorbed by the heat absorption layer 30 can be quickly transferred to the flow-guiding preheating structure 20, and the flow-guiding preheating structure 20 can then quickly preheat the secondary air, further improving the combustion efficiency of the fuel gas.

[0078] See also Figures 4 to 9 The flow guiding preheating structure 20 may include a flow guiding substrate 21, which is connected to the inner side surface 103 and extends into the combustion chamber 10a. Figure 5 , Figure 7 and Fig.11The heat absorption layer 30 is disposed on at least the upper surface or at least the lower surface of the flow-guiding substrate 21. The flow-guiding substrate 21 and the pot support body 10 can be an integral component. When the pot support body 10 includes a top plate 105 and a bottom plate 106 connected together, the flow-guiding substrate 21 can be an integral component with the top plate 105. Figure 5 , Figure 7 and Fig.11 , or it can be an integrated component with the top plate 105. The integrated component of the flow guide base 21 and the top plate 105 or the integrated component of the flow guide base 21 and the bottom plate 106 can be formed by stamping or stretching a substrate, which has the advantages of simple process, convenient manufacturing and low cost.

[0079] It should be noted that the pot support body 10 usually uses aluminum parts with a lower radiation absorption rate, and materials with a radiation absorption rate greater than that of aluminum parts usually have a higher cost. If the flow-guiding preheating structure 20 with a higher radiation absorption rate is used as the heat-absorbing layer 30 as a whole, the cost of the pot support body 10 will be higher. Therefore, by using aluminum parts and other materials with a lower radiation absorption rate as the flow-guiding preheating structure 20 and arranging the heat-absorbing layer 30 on the flow-guiding preheating structure 20, the overall cost of the pot support can be reduced while improving the preheating effect of the flow-guiding preheating structure 20.

[0080] In some embodiments of the present application, the flow guide base 21 divides the inner side surface 103 into an upper inner side surface and a lower inner side surface along the height direction of the pot support body 10. Figure 3 , Figure 5 and Figure 7 The guide matrix 21 can form an annular smoke retention chamber 10b together with the upper inner side surface. The smoke retention chamber 10b is used to retain the smoke generated by the burner 200 to extend the heat exchange time between the smoke and the bottom of the cookware. Moreover, the guide matrix 21 constitutes part of the cavity wall of the smoke retention chamber 10b. The smoke retained in the smoke retention chamber 10b can also exchange heat with the guide matrix 21, thereby increasing the temperature of the guide matrix 21. Furthermore, when the secondary air flows through the lower surface of the guide matrix 21, the temperature of the secondary air can be further increased. The heated secondary air is guided to the fire hole of the burner 200 to participate in the combustion, which can improve the combustion efficiency of the gas.

[0081] It should be noted that, in the embodiment of the present application, a heat absorption layer 30 may be further provided on at least the upper inner side surface. In this way, the heat absorption layer 30 located on the upper inner side surface can quickly and fully exchange heat with the smoke retained in the smoke retention chamber 10b, absorb the heat of the smoke in the smoke retention chamber 10b, and further reduce the heat loss to the surrounding environment of the kitchen stove along with the smoke, thereby improving the thermal efficiency of the kitchen stove.

[0082] The structure of the guide preheating structure 20 forming the smoke retention chamber 10b can also be in various forms. Figure 5 , the flow guiding and preheating structure 20 includes at least one flow guiding matrix 21. The flow guiding matrix 21 serves as a basic platform of the flow guiding and preheating structure 20 and can be a plate with a certain thickness. It can be understood that the flow guiding matrix 21 can be connected to the inner side surface 103 and arranged in an annular shape, so that the upper surface of the flow guiding matrix 21 can form an annular smoke retention chamber 10b together with the upper inner side surface.

[0083] See also Figure 7 When there are multiple flow-guiding substrates 21, one of the multiple flow-guiding substrates 21 can be connected to the pot rack body 10 and define a smoke retention chamber 10b with the upper inner side surface. The remaining flow-guiding substrates 21 in the multiple flow-guiding substrates 21 can be connected in sequence below the previous flow-guiding substrate 21. A gap is left between two adjacent flow-guiding substrates 21, so that a flow-guiding channel 21a can be defined between two adjacent flow-guiding substrates 21. Among them, the designer can determine the size of the gap between two adjacent flow-guiding substrates 21 based on factors such as the number of flow-guiding substrates 21 and the size of the space between the flow-guiding substrate 21 and the pot rack body 10, and the embodiments of the present application will not be repeated here. The following is an explanation of the flow-guiding preheating structure 20 including two flow-guiding substrates 21.

[0084] like Figure 7 As shown, two flow guide substrates 21 are spaced apart in the height direction of the pot support 100. The upper flow guide substrate 21 is connected to the pot support body 10, and the lower flow guide substrate 21 is spaced apart from the pot support body 10, and its end away from the pot support body 10 is connected to the upper flow guide substrate 21. In this way, a flow guide channel 21a can be formed. The flow guide channel 21a is connected to the combustion chamber 10a. Figure 5 , the gap between the lower flow-guiding substrate 21 and the pot rack body 10 can form an air inlet 21ai, and the secondary air can flow into the flow-guiding channel 21a through the air inlet 21ai. An air outlet 21ao is provided at the connection between the two flow-guiding substrates 21, and the secondary air in the flow-guiding channel 21a flows to the fire hole of the burner 200 in the combustion chamber 10a through the air outlet 21ao. It can be understood that multiple air outlets 21ao can be set in a one-to-one correspondence with multiple flow-guiding channels 21a, or one flow-guiding channel 21a can be connected to multiple air outlets 21ao, and the embodiment of the present application does not make specific limitations on this.

[0085] Since the guide preheating structure 20 is arranged on the inner side 103 of the pot rack body 10, the guide channel 21a is connected to the combustion chamber 10a, so that the secondary air can enter the guide channel 21a from the air inlet 21ai between the guide substrate 21 and the pot rack body 10. The at least two guide substrates 21 constituting the guide channel 21a have a large heat exchange area, and after being subjected to the heat radiation of the flame in the combustion chamber 10a, the temperature is significantly higher than the temperature of the secondary air. Therefore, the heat of the guide substrate 21 can be transferred to the secondary air entering the guide channel 21a, preheating the secondary air and increasing the temperature of the secondary air, thereby further improving the thermal efficiency of the kitchen stove.

[0086] In addition to the flow guiding matrix 21, the flow guiding preheating structure 20 may also include a flow guiding heat exchanger. The flow guiding heat exchanger is used to exchange heat with the smoke in the smoke retention chamber 10b and transfer the heat to the flow guiding matrix 21. Since it is necessary to exchange heat with the smoke in the smoke retention chamber 10b, at least part of the flow guiding heat exchanger is located in the smoke retention chamber 10b. Since the high-temperature smoke is retained in the smoke retention chamber 10b, that is, the high-temperature smoke passes through the upper surface of the flow guiding matrix 21, the flow guiding heat exchanger is located at least on the upper surface of the flow guiding matrix 21, and can exchange heat with the high-temperature smoke.

[0087] Of course, the flow-guiding heat-exchanging component can be arranged on the lower surface of the flow-guiding substrate 21 in addition to the upper surface of the flow-guiding substrate 21; or, the flow-guiding heat-exchanging component located on the upper surface of the flow-guiding substrate 21 can also penetrate the flow-guiding substrate 21 and extend to the lower surface of the flow-guiding substrate 21. In this way, the heat on the flow-guiding heat-exchanging component located on the upper surface of the flow-guiding substrate 21 can be transferred to the flow-guiding heat-exchanging component located on the lower surface of the flow-guiding substrate 21, thereby increasing the temperature of the flow-guiding heat-exchanging component on the lower surface of the flow-guiding substrate 21, thereby preheating the secondary air entering the fire cavity 10a from the lower surface of the flow-guiding substrate 21, increasing the temperature of the secondary air, and further improving the thermal efficiency of the kitchen stove.

[0088] It is understandable that the flow-guiding heat exchanger can adopt a variety of structural types, but no matter which structural type the flow-guiding heat exchanger adopts, the upper surface of the flow-guiding base 21 can be made uneven. Therefore, the flow-guiding heat exchanger can effectively increase the heat exchange area or make the secondary air or flue gas form a vortex, thereby realizing as much heat exchange as possible between the flow-guiding heat exchanger and the high-temperature flue gas in the flue gas retention chamber 10b.

[0089] In some embodiments of the present application, the flow guide and heat exchange member may include a plurality of preheating spoilers convexly disposed on the bottom 102 of the pot rack body 10, and the plurality of preheating spoilers are arranged at intervals along the circumference of the pot rack body 10 on at least the upper surface or at least the lower surface of the flow guide base 21. The preheating spoiler can guide the secondary air flowing through the bottom of the pot rack body 10 to form a vortex. The preheating spoiler may include a first preheating spoiler and a second preheating spoiler, and the first preheating spoiler and the second preheating spoiler are both inclined to the radial arrangement of the pot rack body 10; in any group of preheating spoilers, the first preheating spoiler and the second preheating spoiler may be arranged at an angle and at intervals, and in the radial direction and in the direction toward the central axis of the pot rack body 10, the spacing between the first preheating spoiler and the second preheating spoiler gradually increases, extending from the outer side of the pot rack body 10 toward the inner side, and the first preheating spoiler and the second preheating spoiler form a structure similar to an "eight" shape with a large opening facing inward. In this way, a plurality of groups of preheating spoilers can be formed by protruding from the bottom 102 of the pot rack body 10, thereby increasing 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 preheating spoiler, a vortex is formed, which can disturb the secondary air at the bottom of the pot rack 100, prolong the residence time of the secondary air, achieve better heat exchange effect and more heat recovery, and then fully preheat the secondary air at the bottom, so that the gas fuel of the burner can burn more fully, thereby improving the combustion efficiency of the stove.

[0090] like Figures 7 to 12 As shown, in other embodiments of the present application, the flow-guiding heat exchange component may include at least one of a plurality of flow-guiding heat exchange fins 22, a plurality of protrusions 23, a corrugated structure, and a porous medium component 27. That is to say, the flow-guiding heat exchange component may adopt one of the five structures of the preheating spoiler flow-guiding heat exchange fins 22, a plurality of protrusions 23 corrugated structure, and a porous medium component 27, or may adopt a combination of any two or three of the five structures, or may adopt the five structures at the same time, which will not be described in detail in the embodiments of the present application. The structures of the flow-guiding heat exchange fins 22, the protrusions 23, the corrugated structure, and the porous medium component 27 are described in detail below.

[0091] like Figure 8 As shown, a plurality of guide heat exchange fins 22 can be arranged at intervals on the guide base 21 along the circumferential direction of the pot rack body 10. The guide heat exchange fins 22 can be arranged along the radial direction of the pot rack body 10 or at an angle to the radial direction of the pot rack body 10. In particular, the extension direction of the guide heat exchange fins 22 is arranged at an angle to the radial direction of the pot rack body 10, and the guide heat exchange fins 22 can be tilted to increase the length of the guide heat exchange fins 22, so that when the secondary air flows through the gap between two adjacent guide heat exchange fins 22, the heat exchange area with the guide heat exchange fins 22 is increased, thereby effectively improving the heat exchange efficiency between the secondary air and the guide heat exchange fins 22.

[0092] like Fig. 9 As shown, a plurality of protrusions 23 are arranged at intervals along the circumference of the pot rack body 10 on the flow guide base 21; a plurality of protrusions 23 may be convexly provided on the lower surface, upper surface, or upper and lower surfaces of the flow guide base 21. When a plurality of protrusions 23 are arranged on the upper surface of the flow guide base 21, the contact area between the flow guide preheating structure 20 and the smoke can be increased, and the temperature raising efficiency of the flow guide base 21 can be further improved, so that the flow guide base 21 can improve the heating efficiency of the secondary air more quickly. When a plurality of protrusions 23 are arranged on the lower surface of the flow guide base 21, the heat exchange area between the secondary air and the flow guide preheating structure 20 can be further increased, so that the secondary air can be fully preheated, thereby also improving the heating efficiency. When a plurality of protrusions 23 are arranged on the upper and lower surfaces of the flow guide base 21, the above two technical effects can be achieved at the same time, which will not be elaborated here. Compared with the solution in which the lower surface or the upper surface of the guide substrate 21 is flat, the embodiment of the present application arranges a plurality of protrusions 23 to make the lower surface or the upper surface of the guide substrate 21 uneven, which can further improve the heating efficiency of the secondary air and ultimately improve the combustion efficiency of the burner 200 of the stove.

[0093] The corrugated structure is arranged on the flow guiding substrate 21, see Fig.10 , Fig.11 and Fig.12 , the corrugated structure is a radial corrugated structure 25 extending radially along the pot rack body 10, or the corrugated structure is a circumferential corrugated structure 26 extending circumferentially along the pot rack body 10. The embodiment of the present application provides a corrugated structure, which can not only bring the heat radiated by the flame to the pot rack body 10 back to the combustion chamber 10a through the secondary air to supplement the flame, realize heat recovery, and improve the combustion efficiency of the burner 200 of the stove, but also reduce the temperature of the pot rack body 10 through the corrugated structure, effectively improve the high-temperature ablation phenomenon of the pot rack body 10, and at the same time, 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 safety of users.

[0094] In addition, since the corrugated structure itself will fluctuate or bend, the secondary air is more likely to generate vortices when it flows through the undulating or curved parts of the corrugated structure. This can increase the residence time of the secondary air at the bottom of the pot rack 100, improve the heat exchange efficiency between the secondary air and the corrugated structure, and significantly improve the preheating effect of the pot rack 100 of this embodiment on the secondary air.

[0095] See also Figure 7The porous medium member 27 is arranged on the flow-guiding substrate 21, and can allow the secondary air to pass through. Among them, the porous medium member 27 can be selected from foam metals such as foam copper, zeolite, metal mesh or metal fiber, which are heat-conducting media with holes. It can be understood that under the heating of the pot rack body 10, the porous medium member 27 can absorb and store a part of the heat. In addition, since the secondary air can pass through the holes of the porous medium member 27 and exchange heat with the porous medium member 27, the heat exchange of the secondary air can be more sufficient, and the fully preheated secondary air can make the gas fuel of the burner burn more fully, thereby further improving the combustion efficiency of the stove.

[0096] The guide heat exchange component used in the embodiment of the present application can, on the one hand, bring the heat radiated to the pot rack body 10 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. On the other hand, it can also reduce the temperature of the pot rack body 10 and effectively improve the high-temperature ablation phenomenon of the pot rack body 10. In addition, it can also enhance the supplement 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, thereby reducing carbon monoxide emissions and reducing the risk of carbon monoxide poisoning, thereby ensuring the health safety of users.

[0097] In the embodiment of the present application, a heat absorption layer 30 can be further provided on the surface of the flow-guiding heat-exchanging component, or the flow-guiding heat-exchanging component as a whole can be used as the heat absorption layer 30. The heat absorption layer 30 can exchange heat with the smoke in the smoke retention cavity 10b and conduct the heat to the flow-guiding substrate 21, thereby further improving the thermal efficiency of the kitchen stove.

[0098] It should be noted that the heat absorbing layer 30 can be provided on the flow-guiding heat exchanger, the heat absorbing layer 30 can be provided on the flow-guiding preheating structure 20, or the heat absorbing layer 30 can be provided on both the flow-guiding heat exchanger and the flow-guiding preheating structure 20. For example, the flow-guiding preheating structure 20 can be used as the heat absorbing layer 30, or the heat absorbing layer 30 can be provided on the flow-guiding preheating structure 20; the heat absorbing layer 30 can be provided only on the surface of the flow-guiding heat exchanger, or the flow-guiding heat exchanger can be used as the heat absorbing layer 30; the flow-guiding preheating structure 20 can be used as the heat absorbing layer 30, or the heat absorbing layer 30 can be provided on the flow-guiding preheating structure 20, and the heat absorbing layer 30 can be provided on the surface of the flow-guiding heat exchanger, or the flow-guiding heat exchanger can be used as the heat absorbing layer 30. Those skilled in the art can flexibly provide the heat absorbing layer 30 on the flow-guiding heat exchanger and the flow-guiding preheating structure 20 according to factors such as production cost, processing complexity, and thermal efficiency.

[0099] 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.

[0100] 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 (100), characterized in that: include: A pot support body (10) is arranged in an annular shape and encloses a combustion chamber (10a), wherein the combustion chamber (10a) is used for the flame of the burner (200) to pass through, the pot support body (10) has an inner side surface (103) facing the combustion chamber (10a), and the pot support body (10) has a first radiation absorption rate; and The heat absorption layer (30) is at least arranged on the inner side surface (103), and the heat absorption layer (30) has a second radiation absorption rate, and the second radiation absorption rate is greater than the first radiation absorption rate.

2. The pot support (100) according to claim 1, characterized in that: The heat absorption layer (30) is a coating, and the heat absorption layer (30) is fixed to the inner side surface (103) by coating; or The heat absorption layer (30) is a plate, and the heat absorption layer (30) is fixed to the inner side surface (103) by means of clamping, welding or threaded connection.

3. The pot support (100) according to claim 1, characterized in that: The pot rack body (10) is made of stainless steel; The heat absorption layer (30) is at least one of a silver layer, a copper layer, a gold layer, an aluminum layer, a black chrome coating, a black nickel coating and a ceramic layer.

4. The pot support (100) according to claim 1, characterized in that: The thickness of the heat absorption layer (30) is not less than 0.2 mm and not more than 0.5 mm.

5. The pot support (100) according to claim 1, characterized in that: The heat absorption layer (30) does not extend beyond the top end or the bottom end of the inner side surface (103) along the axial direction of the pot rack body (10).

6. The pot support (100) according to any one of claims 1 to 5, characterized in that: The pot support (100) further comprises: a flow guiding and preheating structure (20), arranged on the inner side surface (103) and extending into the combustion chamber (10a), the flow guiding and preheating structure (20) being used to preheat the secondary air and guide the preheated secondary air to the fire hole of the burner (200); The flow-guiding preheating structure (20) as a whole serves as the heat-absorbing layer (30), or the heat-absorbing layer (30) is provided on the flow-guiding preheating structure (20).

7. The pot support (100) according to claim 6, characterized in that: The heat absorption layer (30) is arranged on the flow guiding preheating structure (20), and the flow guiding preheating structure (20) has a third radiation absorption rate, and the third radiation absorption rate is greater than the first radiation absorption rate; and / or The heat absorption layer (30) has a first thermal conductivity, the flow-conducting preheating structure (20) has a second thermal conductivity, and the first thermal conductivity is greater than the second thermal conductivity.

8. The pot support (100) according to claim 6, characterized in that: The flow guiding and preheating structure (20) comprises: A flow-guiding substrate (21), the flow-guiding substrate (21) is connected to the inner side surface (103) and extends into the combustion chamber (10a), and the heat-absorbing layer (30) is arranged on at least the upper surface or at least the lower surface of the flow-guiding substrate (21).

9. The pot support (100) according to claim 8, characterized in that: The flow-guiding matrix (21) divides the inner side surface (103) into an upper inner side surface and a lower inner side surface along the height direction of the pot rack body (10), and at least the upper inner side surface is provided with the heat-absorbing layer (30); The guide substrate (21) and the upper inner side surface together form an annular smoke retention chamber (10b), and the smoke retention chamber (10b) is used to retain smoke generated by the burner (200) to prolong the heat exchange time between the smoke and the bottom of the cookware.

10. The pot support (100) according to claim 9, characterized in that: The flow guiding and preheating structure (20) further comprises: The flow-guiding heat-exchanging component is arranged on at least the upper surface of the flow-guiding substrate (21) and is at least partially located in the smoke retention chamber (10b), and is configured so that the upper surface of the flow-guiding substrate (21) is uneven. The heat absorbing layer (30) is provided on the surface of the flow-guiding heat-exchanging component, or the flow-guiding heat-exchanging component as a whole is the heat absorbing layer (30), and the heat absorbing layer (30) is used to exchange heat with the smoke in the smoke retention cavity (10b) and conduct heat to the flow-guiding substrate (21).

11. The pot support (100) according to claim 10, characterized in that: The flow-guiding heat-exchanging component is also arranged on the lower surface of the flow-guiding substrate (21); or, The flow-guiding heat-exchanging component on the upper surface of the flow-guiding substrate (21) also penetrates the flow-guiding substrate (21) and extends to the lower surface of the flow-guiding substrate (21).

12. The pot support (100) according to claim 10, characterized in that: The flow-guiding heat-exchanging component comprises a plurality of preheating spoilers protruding from the bottom (102) of the pot rack body (10); the plurality of preheating spoilers are arranged at intervals along the circumference of the pot rack body (10) on at least the upper surface or at least the lower surface of the flow-guiding substrate (21).

13. The pot support (100) according to claim 10, characterized in that: The heat-conducting element includes at least one of the following: a) a plurality of flow-guiding heat-exchanging fins (22) arranged at intervals on the flow-guiding base (21) along the circumferential direction of the pan rack body (10); b) a plurality of protrusions (23) arranged at intervals on the flow guide base (21) along the circumference of the pot support body (10); c) a corrugated structure, arranged on the flow-guiding substrate (21), wherein the corrugated structure is a radial corrugated structure (25) extending radially along the pot support body (10), or the corrugated structure is a circumferential corrugated structure (26) extending circumferentially along the pot support body (10); d) A porous medium member (27), disposed on the flow guide substrate (21) and configured to allow secondary air to pass through.

14. The pot support (100) according to claim 10, characterized in that: The flow guiding preheating structure (20) comprises at least two flow guiding substrates (21), one of which is connected to the pot support body (10) and defines the smoke retention cavity (10b) on the upper inner side surface, and the remaining flow guiding substrates (21) are sequentially connected below the previous flow guiding substrate (21); A flow guide channel (21a) is defined between two adjacent flow guide substrates (21), the flow guide channel (21a) being connected to the combustion chamber (10a), and secondary air enters the flow guide channel (21a) from between the flow guide substrate (21) and the pot rack body (10).

15. The pot support (100) according to claim 10, characterized in that: The pot rack (100) comprises a top plate (105) and a bottom plate (106) connected in an up-down direction, wherein the top plate (105) and the bottom plate (106) enclose a heat-insulating cavity (10d); The flow-guiding base (21) and the top plate (105) are an integral component, or the flow-guiding base (21) and the bottom plate (106) are an integral component.

16. A cooking appliance, characterized in that: include: The pot support (100) according to any one of claims 1 to 15; and A burner (200), at least a portion of which is disposed in the combustion chamber (10a).

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