Pot racks and stoves

Abstract

The embodiment of the present application discloses a pot rack and a stove. The pot rack is arranged in a ring shape as a whole and encloses a combustion chamber, and the combustion chamber is used for the flame of the burner to pass through. The pot rack has a smoke reflow channel, and the smoke reflow channel has a reflow inlet on the upper side of the pot rack, and the smoke reflow channel has a reflow outlet connected to the combustion chamber on the inner side of the pot rack facing the combustion chamber. The embodiment of the present application can guide part of the smoke after the gas fuel in the burner is burned into the smoke reflow channel by setting the smoke reflow channel, and the smoke flows out from the reflow outlet and participates in the combustion reaction with the flame in the combustion area, so as to reduce the temperature of the combustion area, thereby reducing the generation of nitrogen oxides, and improving the overall thermal efficiency of the stove.

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] Cookers are important appliances used for cooking in the kitchen. When the cookers are working, the flame temperature is too high, which easily produces more nitrogen oxides that are harmful to the human body.

[0003] In order to reduce the generation of nitrogen oxides, flame cooling technology is usually used in related technologies to achieve the reduction of nitrogen oxides. That is, a flame cooling body is installed inside the burner or around the flame, and the heat in the high temperature area of ​​the stove is dissipated by heat conduction or radiation, so that the flame is cooled. However, reducing the generation of nitrogen oxides by flame cooling technology can easily lead to a decrease in the thermal efficiency of the stove. Summary of the invention

[0004] The embodiment of the present application provides a pot rack, which aims to reduce the generation of nitrogen oxides and improve the overall thermal efficiency of the stove.

[0005] In a first aspect of an embodiment of the present application, there is provided a pot stand, wherein the pot stand is arranged in an annular shape as a whole and encloses a combustion chamber, wherein the combustion chamber is used for the flame of the burner to pass through, and the pot stand itself is independently provided with a smoke reflow channel, wherein the smoke reflow channel has a reflow inlet on the upper side of the pot stand, and the smoke reflow channel has a reflow outlet connected to the combustion chamber on the inner side of the pot stand facing the combustion chamber, wherein the smoke reflow channel is used for recovering the smoke generated by the burner and flowing out of the combustion chamber through the reflow inlet, and returning the smoke to the combustion chamber through the reflow outlet; the pot stand comprises a pot stand body and a smoke collecting hood, wherein the pot stand body has a mounting groove on the side facing the combustion chamber, and the mounting groove faces the upper side and the inner side of the pot stand. The smoke collecting hood is at least partially installed in the installation groove, and the smoke collecting hood is spaced apart from the groove wall of the installation groove so that at least part of the smoke reflow channel is formed between the smoke collecting hood and the groove wall of the installation groove, wherein the upper side of the pot rack body and the upper side of the smoke collecting hood are spaced apart along the radial direction of the combustion chamber to construct the reflow inlet; part of the smoke reflow channel is formed between the smoke collecting hood and the groove wall of the installation groove and forms a first reflow section; a second reflow section connected to the first reflow section is constructed in the smoke collecting hood, and the second reflow section has the reflow outlet on the side of the smoke collecting hood facing the combustion chamber, wherein the smoke reflow channel includes the first reflow section and the second reflow section.

[0006] Furthermore, the pot rack body includes a main body upper shell, the main body upper shell includes a top shell and a channel lower shell, one end of the channel lower shell is connected to an end of the top shell close to the combustion chamber, the other end of the channel lower shell is connected to the bottom of the smoke hood, the channel lower shell is located below the top shell in the height direction and forms the mounting groove, and the middle part of the channel lower shell is spaced apart from the smoke hood to form the first reflux section.

[0007] Furthermore, at the connection between the top shell and the channel lower shell, the main body upper shell is configured with a protrusion protruding toward the smoke collecting hood, and the protrusion and the smoke collecting hood are spaced apart along the radial direction of the combustion chamber to form the reflux inlet.

[0008] Further, the protrusion extends continuously along the circumference of the pot rack body and is arranged in a ring shape; or, a plurality of protrusions are arranged at intervals along the circumference of the pot rack body.

[0009] Furthermore, in the radial direction of the combustion chamber, the width of the protrusion is not less than 2 mm and not more than 7 mm.

[0010] Furthermore, the channel lower shell is an arc-shaped shell which is concavely arranged in a direction away from the smoke collecting hood.

[0011] Furthermore, the pot support body also includes a main body lower shell, a heat insulation cavity is formed between the main body lower shell and the main body upper shell, and the main body lower shell includes a bottom shell, an outer shell and an inner shell. The bottom shell is arranged relative to the top shell and the channel lower shell in the height direction; the top end of the outer shell is connected to the outer edge of the top shell away from the combustion cavity, and the bottom end of the outer shell is connected to the outer edge of the bottom shell away from the combustion cavity; the top end of the inner shell is connected to the inner edge of the channel lower shell close to the combustion cavity, and the bottom end of the inner shell is connected to the inner edge of the bottom shell close to the combustion cavity.

[0012] Furthermore, the smoke collecting hood includes an upper cover shell and a lower cover shell, the upper cover shell is spaced apart from the top shell along the radial direction of the combustion chamber to form the reflow inlet; the lower cover shell is at least partially disposed in the mounting groove and is spaced apart from the groove wall of the mounting groove to form the first reflow section, the side of the lower cover shell away from the combustion chamber is connected to the side of the upper cover shell away from the combustion chamber, the side of the lower cover shell close to the combustion chamber is spaced apart from the side of the upper cover shell close to the combustion chamber to form the reflow outlet, the middle part of the lower cover shell is spaced apart from the middle part of the upper cover shell to form the second reflow section, and the lower cover shell also has a connecting port connecting the first reflow section and the second reflow section.

[0013] Further, the communication opening includes a plurality of communication openings spaced apart along the circumference of the smoke collecting hood; or, the communication opening extends continuously along the circumference of the smoke collecting hood and is arranged in a ring shape.

[0014] Furthermore, the communication opening includes at least one of a round hole, a slit hole, a square hole and a special-shaped hole.

[0015] Furthermore, the upper cover shell includes a cover top shell and an air outlet top shell connected to each other; the lower cover shell includes a cover bottom shell and an air outlet bottom shell connected to each other, wherein the side of the cover top shell away from the combustion chamber is connected to the side of the cover bottom shell away from the combustion chamber, the remaining part of the cover top shell and the remaining part of the cover bottom shell are spaced apart from each other to form a reflux chamber, the air outlet bottom shell and the air outlet top shell are spaced apart from each other to form an air outlet sub-section and the reflux outlet that are interconnected, and the second reflux section includes the reflux chamber and the air outlet sub-section.

[0016] Furthermore, in the height direction, the cover top shell is lower than the top shell, and the height difference between the highest point of the cover top shell and the lowest point of the top shell is not less than 5 mm and not more than 10 mm.

[0017] Furthermore, the cover top shell is inclined toward the direction close to the channel lower shell, and the inclination angle between the cover top shell and the horizontal plane is not less than 10 degrees and not more than 60 degrees.

[0018] Furthermore, the smoke reflow channel extends continuously along the circumference of the pot support and is arranged in a ring shape, wherein in the radial direction of the combustion chamber, the size of the smoke reflow channel is not less than 9 mm and not more than 15 mm.

[0019] Furthermore, the smoke reflow channel comprises a plurality of smoke reflow channels spaced apart along the circumference of the pot support, wherein in the radial direction of the combustion chamber, the size of each smoke reflow channel is not less than 5 mm and not more than 10 mm.

[0020] A second aspect of an embodiment of the present application provides a stove, comprising the pot rack as described in any one of the above items and a burner, wherein at least a portion of the burner is disposed in the combustion chamber.

[0021] The embodiment of the present application can guide part of the smoke after the gas fuel in the burner is burned into the smoke recirculation channel by setting a smoke recirculation channel on the pot frame. The smoke in the smoke recirculation channel flows out from the recirculation outlet and participates in the combustion reaction with the flame in the combustion area to reduce the combustion temperature. In addition, the smoke can effectively reduce the oxygen content in the combustion area during multiple cycles, thereby reducing the generation of nitrogen oxides. At the same time, the smoke circulated back from the smoke recirculation channel can heat the combustion area to increase the heat gain of the combustion area, thereby improving the overall thermal efficiency of the stove. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments or descriptions of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the structure of a stove in one embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the structure of a pot rack in one embodiment of the present application;

[0025] Figure 3 for Figure 2 Section view along section AA;

[0026] Figure 4 for Figure 3 A local enlarged view at point B;

[0027] Figure 5 The figure is a schematic diagram of the structure of a smoke hood in one embodiment of the present application.

[0028] Explanation of the accompanying drawings: 1000-cooker; 100-pot stand; 101-combustion chamber; 102-smoke reflux channel; 1021-reflux inlet; 1022-reflux outlet; 1023-first reflux section; 1024-second reflux section; 10-pot stand body; 10a-installation groove; 10b-insulating chamber; 11-main body upper shell; 111-top shell; 112-channel lower shell; 12-raised portion; 13-main body lower shell; 131-bottom shell; 132-outer shell; 133-inner shell; 20-smoke hood; 21-upper cover shell; 211-cover top shell; 212-gas outlet top shell; 22-lower cover shell; 221-connecting port; 222-cover bottom shell; 223-gas outlet bottom shell; 23-reflux chamber; 24-gas outlet sub-section; 200-burner. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] See also Figure 1The stove 1000 is a kitchen appliance that uses gas fuel, electricity or other energy sources to heat and cook food. When the stove 1000 is working, the flame temperature is too high, so a lot of nitrogen oxides are generated. Among them, nitrogen oxides mainly include nitrogen monoxide, nitrogen dioxide, etc. They are important air pollutants and have a serious impact on human health and the environment.

[0031] Among them, nitrogen oxides can be divided into fuel type, thermal type and rapid type according to the generation mechanism. Among them, in the market, the type of nitrogen oxides generated by most civilian stoves 1000 when working is thermal type; thermal type means that at a higher temperature, when there is a lack of oxygen in the combustion area, nitrogen in the air will react and generate nitrogen oxides.

[0032] In the related art, technicians use flame cooling and other technologies to reduce the generation of nitrogen oxides. That is, a flame cooling body is installed inside the burner 200 or around the flame, and the heat in the high temperature area of ​​the stove 1000 is dissipated by heat conduction or radiation, so that the flame is cooled. It can be understood that the flame cooling technology mainly reduces the generation of nitrogen oxides by lowering the temperature of the flame, but this requires sacrificing a part of the thermal efficiency of the stove 1000, so that the combustion efficiency of the stove 1000 is reduced.

[0033] See also Figure 1-Figure 3 In order to solve the above problems, the embodiment of the present application provides a stove 1000. The stove 1000 may include a pot rack 100 and a burner 200.

[0034] Specifically, the pot rack 100 can provide stable support for pots such as iron pots, steamers, and casseroles.

[0035] At least part of the burner 200 is arranged on the inner side of the pot support 100. The burner 200 is a device that sprays gas fuel and air in a certain way for mixed combustion, and can be used to heat the pot. It should be noted that the burner 200 mentioned in the embodiment of the present application is usually a civilian burner, and the burner 200 is mostly made of stainless steel or metal iron, aluminum and other high temperature resistant materials. The gas fuel burned by the burner 200 can be liquefied petroleum gas, artificial gas, natural gas, etc.

[0036] The pot support 100 is described in detail below.

[0037] See also Figure 2The pot rack 100 is generally arranged in an annular shape and encloses a combustion chamber 101, and the combustion chamber 101 is used for the flame of the burner 200 to pass through. It can be understood that when the user uses the stove 1000, the pot is placed on the pot rack 100, and at least part of the burner 200 is installed in the combustion chamber 101, so that the flame generated by the burner 200 when burning can pass through the combustion chamber 101 and heat the pot placed on the pot rack 100. Among them, 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, which are not specifically limited in the embodiments of the present application.

[0038] See also Figure 2-Figure 4 Furthermore, the pot rack 100 has a smoke reflow channel 102, which has a reflow inlet 1021 on the upper side of the pot rack 100, and has a reflow outlet 1022 connected to the combustion chamber 101 on the inner side of the pot rack 100 facing the combustion chamber 101. It can be understood that the pot rack 100 itself is independently constructed with a smoke recirculation channel 102, and the smoke recirculation channel 102 is used to recover the smoke generated by the burner 200 and flowing out of the combustion chamber 101 through the recirculation inlet 1021, and return it to the combustion chamber 101 through the recirculation outlet 1022; that is, smoke is generated after the gas fuel in the burner 200 is burned. At this time, the smoke can flow into the smoke recirculation channel 102 from the recirculation inlet 1021 and flow out from the recirculation outlet 1022, so that the smoke is circulated back to the combustion chamber 101, and then the smoke and the flame in the combustion area participate in the combustion reaction; that is, the smoke will exchange heat with the gas fuel and the surrounding medium during the circulation process to reduce the combustion temperature. Furthermore, since the circulating flue gas contains some of the products that have already been burned, such as carbon dioxide and water vapor, these products no longer participate in the exothermic reaction during the combustion process, thereby reducing the combustible material per unit volume; that is, flue gas recirculation will also dilute the concentration of fuel and oxygen in the combustion area, so that the oxygen content in the combustion area is reduced, thereby reducing the generation of nitrogen oxides.

[0039] In addition, the smoke recirculation channel 102 recycles the smoke, and the smoke in the smoke recirculation channel 102 can flow out from the recirculation outlet 1022 to the combustion chamber 101, so that the smoke can heat the combustion area of ​​the burner 200. Therefore, according to the law of conservation of energy, at this time, the loss of smoke discharged out of the stove 1000 is reduced, while the heat gain in the combustion area is increased, and the increase in the heat gain in the combustion area can increase the overall combustion efficiency of the stove 1000, thereby improving the overall thermal efficiency of the stove 1000.

[0040] The embodiment of the present application can guide part of the smoke after the gas fuel in the burner 200 is burned into the smoke reflow channel 102 by setting the smoke reflow channel 102 in the pot frame 100. The smoke in the smoke reflow channel 102 flows out from the reflow outlet 1022 and participates in the combustion reaction with the flame in the combustion area to reduce the combustion temperature. In addition, the smoke can effectively reduce the oxygen content in the combustion area during multiple cycles, thereby reducing the generation of nitrogen oxides. At the same time, the smoke circulated back from the smoke reflow channel 102 can heat the combustion area to increase the heat gain of the combustion area, thereby improving the overall thermal efficiency of the stove 1000.

[0041] Please continue reading Figure 2-Figure 4 In some embodiments, the pot rack 100 includes a pot rack body 10 and a smoke hood 20 .

[0042] Specifically, the pot stand body 10 has a mounting groove 10a on the side facing the combustion chamber 101, and the smoke hood 20 is at least partially installed in the mounting groove 10a, and the mounting groove 10a is open toward the upper side and the inner side of the pot stand 100, so that the smoke hood 20 is at least partially installed in the mounting groove 10a; furthermore, the groove wall of the mounting groove 10a is spaced apart from the smoke hood 20, so that at least a portion of the smoke reflux channel 102 is formed between the smoke hood 20 and the groove wall of the mounting groove 10a. It can be understood that, since the groove wall of the mounting groove 10a is spaced apart from the smoke hood 20 and the mounting groove 10a is open toward the upper side of the pot rack 100, the upper side of the pot rack body 10 and the upper side of the smoke hood 20 can be spaced apart along the radial direction of the combustion chamber 101 to construct a reflux inlet 1021; in this way, when the user places the pot on the pot rack 100 and the stove 1000 is working, part of the smoke generated by the burner 200 can flow smoothly from the reflux inlet 1021 into the smoke reflux channel 102.

[0043] It should be noted that the pot rack body 10 can be 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 single stamping process. For the pot rack body 10 with a double-layer or other multi-layer structure, it can be formed by bonding, welding, hot melting, etc. The present application embodiment does not specifically limit this.

[0044] In some embodiments, the entirety of the smoke reflow channel 102 is formed between the smoke hood 20 and the groove wall of the installation groove 10a. It can be understood that the smoke hood 20 and the groove wall of the installation groove 10a are arranged at intervals in the radial direction of the combustion chamber 101 to construct the entirety of the smoke reflow channel 102; at this time, the groove wall of the installation groove 10a is arranged at intervals along the axial direction of the combustion chamber 101 close to the edge of the combustion chamber 101 and the smoke hood 20 to construct the reflow outlet 1022, that is, after part of the smoke generated by the combustion of the gas burner flows into the smoke reflow channel 102 from the reflow inlet 1021, the smoke flows out from the reflow outlet 1022, so that the smoke flows into the combustion chamber 101 and participates in the combustion reaction with the burner 200, thereby reducing the combustion flame temperature, thereby reducing the generation of nitrogen oxides.

[0045] See also Figure 3-Figure 4 In other embodiments, the smoke reflow channel 102 may include a first reflow section 1023 and a second reflow section 1024. That is, the part of the smoke reflow channel 102 is formed between the smoke hood 20 and the groove wall of the installation groove 10a and is formed as the first reflow section 1023; the second reflow section 1024 connected to the first reflow section 1023 is configured in the smoke hood 20, and the second reflow section 1024 has a reflow outlet 1022 on the side of the smoke hood 20 facing the combustion chamber 101. At this time, the smoke needs to flow through the first reflow section 1023 and the second reflow section 1024 and then flow out from the reflow outlet 1022, so that the smoke flows into the combustion chamber 101 and participates in the combustion reaction with the burner 200, thereby reducing the flame temperature of the combustion area, thereby reducing the generation of nitrogen oxides.

[0046] Please continue reading Figure 3-Figure 4 In some embodiments, the pot support body 10 includes a main body upper shell 11 , and the main body upper shell 11 includes a top shell 111 and a channel lower shell 112 .

[0047] Specifically, one end of the channel lower shell 112 is connected to one end of the top shell 111 close to the combustion chamber 101, and the other end of the channel lower shell 112 is connected to the bottom of the smoke hood 20, and the channel lower shell 112 is located below the top shell 111 in the height direction. It can be understood that in the height direction, the channel lower shell 112 is located below the top shell 111, so that the channel lower shell 112 forms a mounting groove 10a facing the combustion chamber 101. Furthermore, the middle part of the channel lower shell 112 is spaced apart from the smoke hood 20 to form a first reflow section 1023, so that smoke can flow into the first reflow section 1023 from the reflow inlet 1021.

[0048] See also Figure 4Further, in some embodiments, at the connection between the top shell 111 and the channel lower shell 112, the main body upper shell 11 is configured with a protrusion 12 protruding toward the smoke hood 20. It can be understood that the protrusion 12 is provided at the connection between the top shell 111 and the channel lower shell 112, the protrusion 12 protrudes toward the smoke hood 20, and the protrusion 12 and the smoke hood 20 are spaced apart along the radial direction of the combustion chamber 101 to form a reflow inlet 1021, so that, on the one hand, the smoke in the first reflow section 1023 is blocked from flowing outward from the reflow inlet 1021, and on the other hand, the smoke can be effectively ensured to continuously flow from the reflow inlet 1021 into the first reflow section 1023.

[0049] In some embodiments, in the radial direction of the combustion chamber 101, the width of the protrusion 12 is not less than 2 mm and not more than 7 mm; that is, the width of the protrusion 12 protruding toward the smoke hood 20 can be 2 mm, 4 mm, 6 mm, 7 mm, etc., so that, on the one hand, the smoke in the first reflow section 1023 is blocked from flowing outward from the reflow inlet 1021, and on the other hand, the smoke can be effectively ensured to continue to flow into the first reflow section 1023 from the reflow inlet 1021. If the width of the protrusion 12 is less than 2 mm, at this time, since the width of the protrusion 12 protruding toward the smoke hood 20 is small, the protrusion 12 does not achieve the effect of blocking the smoke from flowing outward from the reflow inlet 1021, resulting in insufficient amount of smoke flowing into the first reflow section 1023. If the width of the raised portion 12 is greater than 7 mm, at this time, due to the large width of the raised portion 12, it is easy for the raised portion 12 to block part of the reflow inlet 1021, thereby resulting in insufficient amount of flue gas flowing into the first reflow section 1023 from the reflow inlet 1021. When the amount of flue gas is insufficient, the combustion temperature of the combustion area will not decrease. At this time, the combustion of the burner 200 will still generate more nitrogen oxides.

[0050] It should be noted that the protrusion 12 can form an integral component with the top shell 111 and the channel lower shell 112 to save assembly steps. Of course, in another embodiment, the protrusion 12 can also be installed at the connection between the top shell 111 and the channel lower shell 112 by assembly.

[0051] It should be noted that the protrusion 12 can be constructed in a variety of ways, and the embodiments of the present application do not specifically limit this.

[0052] Exemplarily, the raised portion 12 may be continuously extended along the circumference of the pot support body 10 and be arranged in a ring shape. In this case, the raised portion 12 matches the ring-shaped structure of the pot support body 10 to facilitate processing and manufacturing of the raised portion 12 .

[0053] Exemplarily, a plurality of protrusions 12 are arranged at intervals along the circumference of the pot support body 10. For example, the protrusions 12 may be four, five, six, etc., and are evenly or unevenly distributed at the connection between the top shell 111 and the channel lower shell 112 to block the smoke at the reflux inlet 1021 from flowing outward from the reflux inlet 1021.

[0054] Please continue reading Figure 4 In some embodiments, the channel lower shell 112 is an arc-shaped shell that is recessed in a direction away from the smoke hood 20. That is, the groove wall of the installation groove 10a is recessed in a direction away from the smoke hood 20 to form an arc. Since the first reflow section 1023 is formed between the groove wall of the installation groove 10a and the smoke hood 20, the smoke can flow into the first reflow section 1023 according to the shape of the groove wall of the installation groove 10a, and the groove wall of the installation groove 10a is arranged in an arc shape, so that the speed of the smoke flowing to the first reflow section 1023 can be accelerated.

[0055] Of course, in other embodiments, the lower channel shell 112 is tilted as a whole, that is, the groove wall of the mounting groove 10a is an inclined surface tilted toward the combustion chamber 101 as a whole, so that the speed of the flue gas flowing into the combustion chamber 101 can be accelerated.

[0056] See also Figure 4 In some embodiments, the pot rack body 10 further includes a main body lower shell 13, that is, the pot rack body 10 is a double-layer structure, and a heat insulation cavity 10b is formed between the main body lower shell 13 and the main body upper shell 11. When the cooker 1000 is working, a part of the smoke will also flow from the main body upper shell 11 to the main body lower shell 13 to heat the main body lower shell 13.

[0057] Further, the main shell lower shell includes a bottom shell 131, an outer shell 132 and an inner shell 133. Specifically, the bottom shell 131 is arranged relative to the top shell 111 and the channel lower shell 112 in the height direction; the top end of the outer shell 132 is connected to the outer edge of the top shell 111 away from the combustion chamber 101, and the bottom end of the outer shell 132 is connected to the outer edge of the bottom shell 131 away from the combustion chamber 101; the top end of the inner shell 133 is connected to the inner edge of the channel lower shell 112 close to the combustion chamber 101, and the bottom end of the inner shell 133 is connected to the inner edge of the bottom shell 131 close to the combustion chamber 101, so that the top shell 111, the channel lower shell 112, the inner shell 133, the bottom shell 131 and the outer shell 132 are connected in sequence to enclose and form the heat insulation chamber 10b.

[0058] See also Figure 3-Figure 5 In some embodiments, the smoke hood 20 includes an upper hood shell 21 and a lower hood shell 22 .

[0059] Specifically, along the radial direction of the combustion chamber 101, the upper cover shell 21 and the top shell 111 are spaced apart to form a reflow inlet 1021, so that part of the smoke can flow into the smoke reflow channel 102 from the reflow inlet 1021; the lower cover shell 22 is at least partially arranged in the mounting groove 10a, and the lower cover shell 22 and the groove wall of the mounting groove 10a are spaced apart to form a first reflow section 1023, and the first reflow section 1023 is connected to the reflow inlet 1021; the side of the lower cover shell 22 away from the combustion chamber 101 is connected to the side of the upper cover shell 21 away from the combustion chamber 101, and the side of the lower cover shell 22 close to the combustion chamber 101 is spaced apart from the side of the upper cover shell 21 close to the combustion chamber 101 to form a reflow outlet 1022, so that the smoke in the smoke reflow channel 102 flows out from the reflow outlet 1022. Furthermore, the middle part of the lower cover shell 22 and the middle part of the upper cover shell 21 are arranged at intervals to form a second reflow section 1024, and the lower cover shell 22 also has a connecting port 221 connecting the first reflow section 1023 and the second reflow section 1024. It can be understood that since the first reflow section 1023 is formed by the lower cover shell 22 and the groove wall of the installation groove 10a, and the second reflow section 1024 connected to the first reflow section 1023 is provided in the smoke hood 20, the first reflow section 1023 and the second reflow section 1024 can be connected by providing the connecting port 221 on the lower cover shell 22, so that the smoke in the first reflow section 1023 flows into the second reflow section 1024 through the connecting port 221, and then flows from the second reflow section 1024 to the reflow outlet 1022, so as to facilitate the circulation of the smoke back to the combustion area to participate in the combustion reaction, thereby reducing the combustion temperature, and thus reducing the generation of nitrogen oxides.

[0060] It should be noted that the embodiment of the present application does not specifically limit the shape of the communication opening 221. For example, the shape of the communication opening 221 can be at least one of a round hole, a slit hole, a square hole, and a special-shaped hole.

[0061] See also Figure 5 In some embodiments, the communication openings 221 include a plurality of communication openings 221 spaced apart along the circumference of the smoke hood 20. That is, a plurality of communication openings 221 are spaced apart along the circumference of the lower housing 22. For example, the communication openings 221 may be six, eight, ten, etc., and the communication openings 221 may be spaced apart evenly or unevenly along the circumference of the smoke hood 20, so that the smoke can flow from the first reflow section 1023 to the second reflow section 1024.

[0062] In other embodiments, the connecting port 221 extends continuously along the circumference of the smoke hood 20 and is arranged in a ring shape. In this case, the structure of the connecting port 221 can match the structure formed by the first reflow section 1023 to flow the smoke in the first reflow section 1023 to the second reflow section 1024 as much as possible, thereby avoiding insufficient smoke in the second reflow section 1024.

[0063] See also Figure 4 In some embodiments, the upper cover shell 21 includes a cover top shell 211 and an air outlet top shell 212 that are connected to each other; the lower cover shell 22 includes a cover bottom shell 222 and an air outlet bottom shell 223 that are connected to each other.

[0064] It should be noted that the hood top shell 211 and the air outlet top shell 212 can be formed as an integral component, and the hood bottom shell 222 and the air outlet bottom shell 223 can also be formed as an integral component, so as to facilitate the assembly of the smoke hood 20. Of course, in other embodiments, the hood top shell 211 and the air outlet top shell 212 can be connected by welding, clamping, and bonding, and the hood bottom shell 222 and the air outlet bottom shell 223 can also be connected by welding, clamping, and bonding.

[0065] Please continue reading Figure 4 , further, the second reflow section 1024 may include a reflow cavity 23 and an air outlet sub-section 24. Specifically, the side of the cover top shell 211 away from the combustion chamber 101 and the side of the cover bottom shell 222 away from the combustion chamber 101 may be connected by welding, clamping, bonding, etc.; the remaining part of the cover top shell 211 and the remaining part of the cover bottom shell 222 are spaced apart to form the reflow cavity 23; that is, the remaining part of the cover top shell 211 is spaced apart from the remaining part of the cover bottom shell 222 in the height direction to form the reflow cavity 23 in the smoke hood 20; furthermore, the air outlet bottom shell 223 and the air outlet top shell 212 are spaced apart to form the air outlet sub-section 24 and the reflow outlet 1022 which are connected to each other, and the reflow cavity 23 is connected to the air outlet sub-section 24 and the reflow outlet 1022. It can be understood that the above-mentioned connecting port 221 can be set on the bottom shell 222 of the cover, so that the connecting port 221 connects the first reflux section 1023 and the reflux chamber 23; when the stove 1000 is working, the smoke enters the first reflux section 1023 from the reflux inlet 1021, flows into the reflux chamber 23 through the connecting port 221, and then flows from the reflux chamber 23 to the air outlet sub-section 24 to flow out from the reflux outlet 1022. At this time, as the storage amount of smoke in the smoke reflux channel 102 increases, the smoke flowing out from the reflux outlet 1022 will be sucked by the root of the flame in the combustion area and participate in the combustion, so that the combustion temperature is reduced, thereby reducing the generation of nitrogen oxides.

[0066] In some embodiments, in the height direction, the cover top shell 211 is lower than the top shell 111, and the height difference between the highest point of the cover top shell 211 and the lowest point of the top shell 111 is not less than 5mm and not more than 10mm. It can be understood that the top shell 111 is located above the cover top shell 211 in the height direction, and because the height difference between the highest point of the cover top shell 211 and the lowest point of the top shell 111 is not less than 5mm and not more than 10mm, that is, the height difference between the highest point of the cover top shell 211 and the lowest point of the top shell 111 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., so it is convenient for the top shell 111 and the cover top shell 211 to be spaced apart in the radial direction of the combustion chamber 101 to form the return inlet 1021. Furthermore, by setting the cover top shell 211 below the top shell 111 in the height direction, it is effectively ensured that the smoke smoothly enters the smoke return channel 102 from the return inlet 1021. If the cover top shell 211 is arranged above the top shell 111 in the height direction, most of the smoke will flow from the top shell 111 to the main body lower shell 13, resulting in insufficient smoke intake in the smoke reflow channel 102.

[0067] It should be noted that no matter how many layers the pot support body 10 has, the top shell 211 is always located below the top shell 111 in the height direction, so that the smoke can smoothly enter the smoke reflow channel 102 from the reflow inlet 1021 .

[0068] Please continue reading Figure 4 In some embodiments, the top shell 211 is inclined toward the direction close to the channel lower shell 112, and the inclination angle ɑ between the top shell 211 and the horizontal plane is not less than 10 degrees and not more than 60 degrees, that is, the inclination angle ɑ between the top shell 211 and the horizontal plane can be 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, etc., so that the smoke can smoothly enter the smoke return channel 102 from the return inlet 1021. If the inclination angle ɑ between the top shell 211 and the horizontal plane is less than 10 degrees, at this time, the inclination angle ɑ between the top shell 211 and the horizontal plane is small, which easily causes the smoke to flow from the top shell 111 to the outside of the stove 1000, so as to reduce the amount of smoke flowing into the smoke return channel 102. If the inclination angle ɑ between the top shell 211 of the cover and the horizontal plane is greater than 60 degrees, at this time, the inclination angle ɑ between the top shell 211 of the cover and the horizontal plane is relatively large, and the top shell 211 of the cover is easy to approach the groove wall of the installation groove 10a, so that the radial size of the smoke reflow channel 102 in the combustion chamber 101 becomes smaller. In this way, even if the top shell 211 of the cover is located below the top shell 111 in the height direction, the smoke flowing in from the reflow inlet 1021 will also be bounced back due to contact with the groove wall of the installation groove 10a, thereby resulting in insufficient smoke in the smoke reflow channel 102.

[0069] In some embodiments, the smoke reflow channel 102 extends continuously along the circumference of the pot rack 100 and is arranged in an annular shape. It is understandable that, since the pot rack 100 is arranged in an annular shape as a whole, when the smoke reflow channel 102 extends continuously along the circumference of the pot rack 100 and is arranged in an annular shape, the structure of the smoke reflow channel 102 matches the forming structure of the pot rack 100, so that the pot rack 100 forms the smoke reflow channel 102.

[0070] Furthermore, in the radial direction of the combustion chamber 101, the size of the smoke reflow channel 102 is not less than 9 mm and not more than 15 mm, that is, the size of the smoke reflow channel 102 can be 9 mm, 12 mm, 13 mm, or 15 mm, so that the smoke reflow channel 102 can store enough smoke.

[0071] If the size of the smoke return channel 102 is less than 9 mm, the size of the smoke return channel 102 is small, which may lead to insufficient smoke storage in the smoke return channel 102. If the size of the smoke return channel 102 is greater than 15 mm, the size of the smoke return channel 102 is large, which may lead to a larger overall structure of the pot rack 100, thereby increasing the occupied area of ​​the stove 1000 in the kitchen. Furthermore, the size of the smoke return channel 102 is large, so that the amount of smoke flowing into the smoke return channel 102 is insufficient, which may lead to a slower circulation process of the smoke, which is not conducive to reducing the combustion temperature.

[0072] In other embodiments, the smoke reflow channel 102 includes a plurality of smoke reflow channels 102 arranged at intervals along the circumference of the pot support 100. For example, the smoke reflow channels 102 may be four, six, seven, etc., and the smoke reflow channels 102 may be evenly or unevenly distributed around the pot support 100. At this time, in the radial direction of the combustion chamber 101, the size of each smoke reflow channel 102 is not less than 5 mm and not more than 10 mm, so that the smoke reflow channel 102 can store enough smoke. If the size of the smoke reflow channel 102 is greater than 10 mm, at this time, since the size of the smoke reflow channel 102 is larger, the area of ​​smoke flowing into the smoke reflow channel 102 per unit area becomes larger, so the time for smoke to flow from the smoke reflow channel 102 to the combustion chamber 101 becomes longer, so that the process of smoke circulation becomes slower, which is not conducive to reducing the combustion temperature.

[0073] 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.

[0074] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A pot stand, characterized in that: The pot support is arranged in an annular shape as a whole and encloses a combustion chamber, the combustion chamber is used for the flame of the burner to pass through, the pot support itself is independently provided with a smoke return channel, the smoke return channel has a return inlet on the upper side of the pot support, the smoke return channel has a return outlet connected to the combustion chamber on the inner side of the pot support facing the combustion chamber, the smoke return channel is used to recover the smoke generated by the burner and flowing out of the combustion chamber through the return inlet, and return the smoke to the combustion chamber through the return outlet; the pot support comprises: A pot support body, having a mounting groove on a side facing the combustion chamber, wherein the mounting groove is open toward the upper side and the inner side of the pot support; A smoke collecting hood is at least partially installed in the installation groove and is spaced apart from the groove wall of the installation groove, so that at least a part of the smoke reflow channel is formed between the smoke collecting hood and the groove wall of the installation groove; Wherein, the upper side of the pot support body and the upper side of the smoke collecting hood are spaced apart along the radial direction of the combustion chamber to form the reflux inlet; The part between the smoke collecting hood and the groove wall of the installation groove forms the part of the smoke reflow channel and forms a first reflow section; A second reflow section connected to the first reflow section is constructed in the smoke collecting hood, and the second reflow section has the reflow outlet on a side of the smoke collecting hood facing the combustion chamber; Wherein, the smoke reflow channel includes the first reflow section and the second reflow section.

2. The pot support according to claim 1, characterized in that: The pot rack body comprises a main body upper shell, and the main body upper shell comprises: top case; and, The channel lower shell has one end connected to one end of the top shell close to the combustion chamber, and the other end connected to the bottom of the smoke hood. The channel lower shell is located below the top shell in the height direction and forms the mounting groove. The middle part of the channel lower shell is spaced apart from the smoke hood to form the first reflux section.

3. The pot support according to claim 2, characterized in that: At the connection between the top shell and the channel lower shell, the main body upper shell is configured with a protrusion protruding toward the smoke collecting hood, and the protrusion and the smoke collecting hood are spaced apart along the radial direction of the combustion chamber to form the reflux inlet.

4. The pot support according to claim 3, characterized in that: The protrusion extends continuously along the circumference of the pot support body and is arranged in a ring shape; or, A plurality of protrusions are arranged at intervals along the circumference of the pot rack body.

5. The pot support according to claim 3, characterized in that: In the radial direction of the combustion chamber, the width of the protrusion is not less than 2 mm and not more than 7 mm.

6. The pot support according to claim 2, characterized in that: The channel lower shell is an arc-shaped shell which is concavely arranged in a direction away from the smoke collecting hood.

7. The pot support according to claim 2, characterized in that: The pot rack body also includes a main body lower shell, a heat insulation cavity is formed between the main body lower shell and the main body upper shell, and the main body lower shell includes: A bottom shell, arranged opposite to the top shell and the channel lower shell in a height direction; An outer shell, the top end of which is connected to the outer edge of the top shell away from the combustion chamber, and the bottom end of which is connected to the outer edge of the bottom shell away from the combustion chamber; and The inner shell has a top end connected to the inner edge of the channel lower shell close to the combustion chamber, and a bottom end connected to the inner edge of the bottom shell close to the combustion chamber.

8. The pot support according to claim 2, characterized in that: The smoke collecting hood comprises: an upper cover shell, spaced apart from the top shell along the radial direction of the combustion chamber to form the reflow inlet; and The lower cover shell is at least partially arranged in the installation groove and is spaced apart from the groove wall of the installation groove to form the first reflow section, the side of the lower cover shell away from the combustion chamber is connected to the side of the upper cover shell away from the combustion chamber, the side of the lower cover shell close to the combustion chamber is spaced apart from the side of the upper cover shell close to the combustion chamber to form the reflow outlet, the middle part of the lower cover shell is spaced apart from the middle part of the upper cover shell to form the second reflow section, and the lower cover shell also has a connecting port connecting the first reflow section and the second reflow section.

9. The pot support according to claim 8, characterized in that: The communication openings include a plurality of communication openings spaced apart along the circumference of the smoke collecting hood; or, The communication port extends continuously along the circumference of the smoke collecting hood and is arranged in a ring shape.

10. The pot support according to claim 8, characterized in that: The communication opening includes at least one of a round hole, a slit hole, a square hole and a special-shaped hole.

11. The pot support according to claim 8, characterized in that: The upper cover shell comprises a cover top shell and an air outlet top shell which are connected to each other; The lower cover shell comprises a cover bottom shell and an air outlet bottom shell which are connected to each other; Among them, the side of the cover top shell away from the combustion chamber is connected to the side of the cover bottom shell away from the combustion chamber, and the rest of the cover top shell is spaced apart from the rest of the cover bottom shell to form a reflux chamber; the air outlet bottom shell and the air outlet top shell are spaced apart to form mutually connected air outlet sub-segments and the reflux outlet, and the second reflux section includes the reflux chamber and the air outlet sub-segment.

12. The pot support according to claim 11, characterized in that: In the height direction, the cover top shell is lower than the top shell, and the height difference between the highest point of the cover top shell and the lowest point of the top shell is not less than 5 mm and not more than 10 mm.

13. The pot support according to claim 11, characterized in that: The cover top shell is inclined toward the direction close to the channel lower shell, and the inclination angle between the cover top shell and the horizontal plane is not less than 10 degrees and not more than 60 degrees.

14. The pot support according to claim 1, characterized in that: The smoke reflow channel extends continuously along the circumference of the pot support and is arranged in an annular shape; Wherein, in the radial direction of the combustion chamber, the size of the smoke reflow channel is not less than 9 mm and not more than 15 mm.

15. The pot support according to claim 1, characterized in that: The smoke return channel comprises a plurality of smoke return channels arranged at intervals along the circumference of the pot support; Wherein, in the radial direction of the combustion chamber, the size of each of the smoke reflow channels is not less than 5 mm and not more than 10 mm.

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

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