Pot rack

Abstract

The pot rack comprises an air supplementing ring surrounding a combustor, an energy gathering disc surrounding the combustor and sealing the top of the periphery of the inner space of the air supplementing ring, and a plurality of supports arranged on the energy gathering disc in the circumferential direction at intervals. The air supply ring is provided with a plurality of air supply holes arranged in the circumferential direction, and a ventilation gap is formed between the inner edge of the energy gathering disc and the periphery of the combustor, so that part of air in the inner space is supplied to an injection pipe at the bottom of the combustor, and the other part of air is supplied to the combustion position of a fire cover at the top of the combustor through the ventilation gap. The cavity shell surrounds the energy-gathering disc and forms a hollow structure with the energy-gathering disc, a heat storage cavity which surrounds the energy-gathering disc and receives heat of the energy-gathering disc is formed in the inner space of the hollow structure, and a plurality of heat discharge holes which are communicated with the heat storage cavity and the inner space of the air supply ring are formed in the cavity shell at intervals in the circumferential direction. The energy-gathering disc has the beneficial effects that the heat loss of the energy-gathering disc can be reduced, and supplemented air can be preheated, so that the combustion effect of the combustor is improved.

Description

Technical Field

[0001] The invention relates to a pot rack, in particular to a pot rack capable of improving the combustion quality of a burner. Background Art

[0002] Prior art wok racks for gas cooktops, particularly those with energy-concentrating plates, generally suffer from low thermal efficiency. On the one hand, ambient air flows into the wok rack's interior space due to a pressure differential to supply air to the burner. However, this excessive influx of cold air (especially in winter, when temperatures are low) dilutes the core flame temperature, increasing carbon monoxide emissions and reducing thermal efficiency. On the other hand, as the wok rack's energy-concentrating plates absorb and concentrate heat, the heat from the high-temperature core area radiates outward at a wide angle to the surrounding environment, continuously generating non-steady-state heat loss. Summary of the Invention

[0003] The object of the present invention is to provide a pot support which can reduce the heat loss of an energy-gathering disk and can preheat the supplementary air so as to improve the combustion effect of a burner.

[0004] The present invention is achieved through the following technical solutions.

[0005] A pot support comprises an air supply ring surrounding a burner, an energy-gathering disk surrounding the burner and sealing the top of the outer periphery of the inner space of the air supply ring, and a plurality of brackets spaced circumferentially on the energy-gathering disk; the air supply ring has a plurality of circumferentially arranged air supply holes to allow external air to enter the inner space; a ventilation gap is defined between the inner edge of the energy-gathering disk and the outer periphery of the burner, so that a portion of the air in the inner space is supplied to an ejector tube at the bottom of the burner, and another portion of the air is supplied to the combustion area of ​​a fire cap at the top of the burner through the ventilation gap; In addition, a cavity shell surrounds the energy gathering disk and forms a hollow structure with it, the internal space of the hollow structure forms a heat storage cavity surrounding the energy gathering disk and receiving its heat, and the cavity shell is provided with a plurality of heat exhaust holes connecting the heat storage cavity and the inner space of the air replenishing ring at intervals along the circumference, which are used to heat the air entering the inner space.

[0006] As a further improvement of the present invention, the energy-gathering disk is divided into an inner disk portion located in the inner space of the air-supplementing ring and an outer disk portion located in the outer space of the air-supplementing ring. The cavity shell is integrally connected to the outer disk portion to form a hollow structure with the heat storage cavity.

[0007] As a further improvement of the present invention, the cavity shell is integrally connected to the outer edge of the energy collecting disk and the top edge of the air supply ring respectively, and the cavity shell has a sealing edge portion connected to the top edge of the air supply ring and fixed on the energy collecting disk, and the heat exhaust hole is arranged on the sealing edge portion of the cavity shell.

[0008] As a further improvement of the present invention, at least the portion of the edge sealing portion that contacts the energy concentrating disk forms an arc-shaped transition.

[0009] As a further improvement of the present invention, the edge sealing portion has a plurality of recessed structures spaced apart along the circumferential direction and forming gaps with the energy concentrating disks, and the gaps formed by the recessed structures and the energy concentrating disks form the heat exhaust holes.

[0010] As a further improvement of the present invention, both ends of the recessed structure extend to the top of the air replenishing ring and the outer portion of the cavity shell located at the edge sealing portion, and the recessed degree of the recessed structure gradually deepens from both sides to the middle thereof.

[0011] As a further improvement of the present invention, the cavity shell further comprises a ring portion bent downward and extended from the outer edge of the energy-gathering disk, and a disk portion extending toward the periphery from the edge sealing portion, and the ring portion and the disk portion seal the cavity shell.

[0012] As a further improvement of the present invention, the outer edge of the energy concentrating disk is higher than the inner edge, and the portion of the energy concentrating disk with a height change is in an arc-shaped transition.

[0013] As a further improvement of the present invention, the inner edge of the energy concentrating disk has a guide ring that bends and extends downward.

[0014] As a further improvement of the present invention, a step structure is formed in the circumferential direction at a portion of the energy concentrating disk close to the outer edge, and a plurality of the brackets are connected to a bracket ring, which is arranged on the step structure.

[0015] Beneficial effects of the present invention: The energy-gathering disk serves as a dual-function thermal component: first, it reflects and redistributes the flame's thermal radiation, focusing high-temperature radiation energy on the bottom of the pot to improve heat conduction efficiency; second, it acts as a solid thermal bridge, continuously channeling excess surface heat into the heat storage cavity of the cavity shell. The heat storage cavity then stores heat to enhance the energy-gathering effect of the energy-gathering disk; high-temperature air accumulated in the heat storage cavity overflows from the heat exhaust holes driven by natural convection, undergoing forced turbulent mixing with the supply air flowing through the heat exhaust holes. The preheated primary air supply mixes with the fuel gas in the ejector tube, raising the initial reaction temperature, shortening the ignition delay period and expanding the flame stability boundary; at the same time, the preheated secondary air supply to the fire cover area can suppress the critical temperature of soot formation. The continuous release of heat from the heat storage cavity through the heat exhaust holes simultaneously consumes the heat energy stored in the cavity, smoothing the overall temperature gradient of the cavity shell. This effectively avoids the expansion and deformation differences of the metal around the energy-gathering plate due to local overheating, thereby maintaining the service life of the pot rack from a structural level. Since the heat exhaust hole is located at a high position in the inner space, the air entering the inner space forms a vertical temperature gradient, so that the temperature of the secondary air supply is higher than that of the primary air supply; the fire cover area obtains a higher temperature secondary air supply, which directly increases the oxidation reaction intensity in the flame core area, promotes the full cracking of gas molecules and the efficiency of free radical chain reaction, and eliminates carbon soot generation caused by local hypoxia. The primary air supply of the ejector tube retains a higher density because it is in a relatively low temperature zone, maintains the ejector tube's suction power for the gas, avoids excessive preheating to reduce the ejection efficiency, and at the same time, moderate preheating can still prevent gas condensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the objects and advantages of the present invention, wherein: Figure 1 A schematic diagram of the structure of a pot rack in one viewing angle; Figure 2 This is a structural diagram of the pot rack from another perspective; Figure 3 It is a partial cross-sectional schematic diagram of the pot rack; Figure 4 It is a partial cross-sectional schematic diagram of a pot support and a burner; Figure 5 Schematic diagram for the pot holder and burner and air supplement. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and implementation examples.

[0018] In this specification, directional terms such as up, down, left, right, front, back, front, back, top, and bottom, which are mentioned or may be mentioned, are defined relative to the configurations shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may vary depending on the location and usage of the component. Therefore, these or other directional terms should not be construed as restrictive.

[0019] A pot rack, referring to Figure 1-Figure 5 It includes an air supply ring 1 surrounding the burner 4, an energy-gathering disk 2 surrounding the burner 4 and sealing the top of the inner peripheral space r of the air supply ring 1, a plurality of brackets 51 arranged on the energy-gathering disk 2 at intervals along the circumferential direction, and a cavity shell 3 surrounding the energy-gathering disk 2 and forming a hollow structure with it.

[0020] The air supply ring 1 is a thin-walled, annular structure of a certain height, equipped with multiple circumferentially arranged air supply holes 11. These holes are evenly distributed along the circumference, allowing outside air to enter the inner space r within the air supply ring 1. The energy collecting disk 2 is a disk-shaped structure with a hole in its center. A ventilation gap d is defined between its inner edge and the outer periphery of the burner 4. This allows a portion of the air in the inner space r to be supplied to the ejector tube 41 at the bottom of the burner 4, while another portion of the air is supplied through the ventilation gap d to the combustion area of ​​the flame cap 42 at the top of the burner 4. The cavity shell 3 is an annular structure. The hollow space formed by the cavity shell and the energy collecting disk 2 forms a heat storage chamber c. The heat storage chamber c surrounds the energy collecting disk 2 and receives its heat. The cavity shell 3 is provided with multiple heat exhaust holes h spaced circumferentially, connecting the heat storage chamber c with the inner space r of the air supply ring 1, to heat the air entering the inner space r.

[0021] In this embodiment, the air supply hole 11 of the air supply ring 1 allows the outside air to enter the inner space r of the air supply ring 1 in a quantitative manner driven by the pressure difference. At the same time, the air supply ring 1 can play a throttling role to limit the total amount of air supplied to avoid excessive air supply impacting the flame core area, thereby ensuring the combustion stability of the fire cover 42; part of the air entering the inner space r is supplied and transported to the inlet of the ejector tube 41 to provide a smooth primary air supply for the gas mixing section, and the other part is transported to the outer flame area of ​​the fire cover 42 through the ventilation gap d.

[0022] The energy concentrating plate 2 serves as a dual-function thermal component: first, it reflects and redistributes the flame's thermal radiation, focusing high-temperature radiation energy at the pot bottom to enhance heat transfer efficiency. Second, it acts as a solid thermal bridge, continuously channeling excess surface heat into the heat storage chamber c of the pot shell 3 through the thermal conductivity of its material. The heat storage chamber c then stores heat, enhancing the energy concentrating effect of the energy concentrating plate 2. High-temperature air accumulated in the heat storage chamber c, driven by natural convection, escapes through the heat exhaust holes h, where it undergoes forced turbulent mixing with the supply air flowing through these holes. This preheated primary air mixes with the fuel gas in the ejector tube 41, raising the initial reaction temperature, shortening the ignition delay period and expanding the flame stability margin. Simultaneously, the preheated secondary air supplied to the flame cap 42 suppresses the critical temperature for soot formation. Furthermore, the continuous release of heat from the heat storage chamber c through the heat exhaust holes h simultaneously consumes the stored thermal energy within the cavity, smoothing the overall temperature gradient of the pot shell 3. This effectively prevents differential expansion and deformation of the metal surrounding the energy concentrating plate 2 due to localized overheating, thereby maintaining the service life of the pot frame at a structural level.

[0023] In addition, it should be noted that since the heat exhaust hole h is located at a high position in the inner space r, the air entering the inner space r forms a vertical temperature gradient, so that the temperature of the secondary air supply (fire cover 42) is higher than the temperature of the primary air supply (ejector tube 41); the fire cover 42 area obtains a higher temperature secondary air supply, which directly increases the oxidation reaction intensity in the core area of ​​the flame, promotes the full cracking of the gas molecules and the efficiency of the free radical chain reaction, and eliminates the carbon soot generation caused by local hypoxia. The primary air supply of the ejector tube 41 retains a higher density because it is in a relatively low temperature zone, maintains the suction power of the ejector tube 41 for the gas, avoids excessive preheating to reduce the ejection efficiency, and at the same time, moderate preheating can still prevent gas condensation.

[0024] In this embodiment, the energy concentrating disk 2 is divided into two parts: an inner disk portion 21 located within the inner space r of the air supply ring 1, and an outer disk portion 22 located outside the air supply ring 1. The cavity shell 3 is a thin-walled structure that is integrally connected to the outer disk portion 22, forming a hollow structure with a heat storage cavity c. The inner disk portion 21 is adjacent to the burner 4's flame cap 42 and directly bears the high-temperature impact of the flame. However, due to its limited heat capacity and the cooling effect of the flame's turbulent flow, its actual steady-state temperature is lower than that of the outer disk portion 22. The outer disk portion 22, located in the peripheral area of ​​the flame radiation, continuously absorbs high-temperature infrared radiation energy. Due to the weakened thermal convection, heat accumulation occurs, maintaining a higher temperature. The integrated connection between the cavity shell 3 and the outer disk portion 22 forms a thermally resistance-free interface, allowing the heat energy accumulated in the outer disk portion 22 to be efficiently transferred to the heat storage cavity c. Compared to a split structure, the integrated structure reduces and eliminates the contact thermal resistance of traditional prefabricated structures. Furthermore, the integrally formed hollow cavity significantly increases the heat storage density per unit volume by increasing the material's heat capacity, further enhancing the heat storage function of the heat storage cavity c.

[0025] In this embodiment, the cavity shell 3 is integrally connected to the outer edge of the energy-gathering disk 2 and the top edge of the air-supplementing ring 1, further simplifying the overall structure of the pot frame. Furthermore, the integral connection between the top edge of the air-supplementing ring 1 and the cavity shell 3 forms a self-supporting frame, eliminating localized thermal stress concentration and ensuring uniform radial deformation of the heat storage cavity c during thermal expansion. The cavity shell 3 includes a sealed edge portion 31 connected to the top edge of the air-supplementing ring 1 and affixed to the energy-gathering disk 2. Heat exhaust holes h are provided on the sealed edge portion 31 of the cavity shell 3. The sealed edge portion 31 of the cavity shell 3 closely adheres to the surface of the energy-gathering disk 2, forming a seamless thermal bridge. This allows the flame radiant heat absorbed by the energy-gathering disk 2 to be efficiently transferred to the heat storage cavity c, while preventing the high temperature from spreading to non-functional areas.

[0026] In this embodiment, at least the portion of the edge seal 31 that contacts the energy concentrating disk 2 forms an arcuate transition. The edge seal 31 and the energy concentrating disk 2 are fixedly connected using spot welding. The arcuate contact of the edge seal 31 increases the heat conduction contact area between the energy concentrating disk 2 and the cavity shell 3, thereby preventing the risk of local deformation and cracking and maintaining overall sealing.

[0027] In this embodiment, the edge seal 31 has multiple recessed structures 311, spaced circumferentially and forming gaps with the energy-gathering disk 2. The gaps formed by the recessed structures 311 and the energy-gathering disk 2 form heat exhaust holes h. The recessed structures 311 serve as heat exhaust holes h to heat the incoming air. Furthermore, the recessed structures 311 themselves act as three-dimensional reinforcements for the edge seal 31 of the cavity shell 3. By increasing the cross-sectional moment of inertia, they effectively suppress high-temperature creep deformation, ensuring geometric stability of the overall structure under thermal loads and enhancing the overall structural strength of the cavity shell 3.

[0028] In this embodiment, the two ends of the recessed structure 311 extend to the top of the air supply ring 1 and the outer part of the cavity shell 3 located at the edge sealing portion 31, respectively, so that the coverage range of the reinforcing ribs formed by the recessed structure 311 is expanded, and the structural strength of the cavity shell 3 and the air supply ring 1 is further improved as a whole. The degree of depression of the recessed structure 311 gradually deepens from its two sides to its middle. At the same time, the gradient of the recessed depth induces the hot air flow overflowing from the heat storage cavity c to accelerate along the curved surface, thereby improving the mixing efficiency of the forced turbulence of the hot air and the supply air.

[0029] In this embodiment, the cavity shell 3 also has a ring portion 32 bent downward and extended from the outer edge of the energy-gathering disk 2, and a disk portion 33 extending toward the periphery from the edge sealing portion 31. The ring portion 32 and the disk portion 33 close the cavity shell 3. The disk portion 33 gradually rises from the inner edge to the outer edge, and its outer edge rests on the inner wall of the disk portion 33. The two can also be fixed together by spot welding.

[0030] In this embodiment, the outer edge of the energy concentrating disk 2 is higher than its inner edge, and the portion of the disk 2 with varying heights forms an arc-shaped transition. More specifically, the disk 2 gradually descends from the outer edge inward to its lowest height before reaching a horizontal position at the inner edge. The curved surface of the disk 2 forms a parabolic reflector, focusing and reflecting the laterally diffused infrared radiation from the flame onto the core heated area at the bottom of the pot, significantly reducing ineffective heat scattering and improving energy concentration.

[0031] In this embodiment, the inner edge of the energy collecting disk 2 has a guide ring 23 that bends and extends downward. The setting of the guide ring 23 can guide the air and use the Venturi tube effect to improve the air supply efficiency of the fire cover 42 through the ventilation gap d.

[0032] In this embodiment, a step structure 24 is formed along the circumferential direction at a portion of the energy concentrating disk 2 near the outer edge, and a plurality of brackets 51 are connected to a bracket ring 52 , which is disposed on the step structure 24 .

[0033] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A pot rack, characterized in that: It comprises an air supply ring (1) surrounding a burner (4), an energy collecting disk (2) surrounding the burner (4) and sealing the outer periphery of the inner space (r) of the air supply ring (1), and a plurality of brackets (51) arranged on the energy collecting disk (2) at intervals along the circumference; the air supply ring (1) has a plurality of air supply holes (11) arranged along the circumference, so that external air enters the inner space (r); a ventilation gap (d) is provided between the inner edge of the energy collecting disk (2) and the outer periphery of the burner (4), so that a part of the air in the inner space (r) is supplied to the ejector tube (41) at the bottom of the burner (4), and another part of the air is supplied to the combustion position of the fire cover (42) at the top of the burner (4) through the ventilation gap (d); And, a cavity shell (3) surrounding the energy collecting disk (2) and forming a hollow structure therewith, the internal space of the hollow structure forming a heat storage cavity (c) surrounding the energy collecting disk (2) and receiving its heat, the cavity shell (3) being provided with a plurality of heat exhaust holes (h) communicating with the heat storage cavity (c) and the inner surrounding space (r) of the air supply ring (1) at intervals along the circumference, for heating the air entering the inner surrounding space (r).

2. The pot stand according to claim 1, characterized in that: The energy-gathering disk (2) is divided into an inner disk portion (21) located in the inner surrounding space (r) of the air-supplementing ring (1) and an outer disk portion (22) located in the outer peripheral space of the air-supplementing ring (1); the cavity shell (3) is integrally connected to the outer disk portion (22) to form a hollow structure having the heat storage cavity (c).

3. The pot stand according to claim 2, characterized in that: The cavity shell (3) is integrally connected to the outer edge of the energy-gathering disk (2) and the top edge of the air-supplementing ring (1), respectively, and the cavity shell (3) has a sealing edge (31) connected to the top edge of the air-supplementing ring (1) and fixed to the energy-gathering disk (2), and the heat exhaust hole (h) is provided on the sealing edge (31) of the cavity shell (3).

4. The pot support according to claim 3, characterized in that: At least the portion of the edge sealing portion (31) that contacts the energy gathering disk (2) forms an arc-shaped transition.

5. The pot support according to claim 3, characterized in that: The edge sealing portion (31) has a plurality of recessed structures (311) spaced apart along the circumferential direction and forming gaps with the energy gathering disk (2); the gaps formed by the recessed structures (311) and the energy gathering disk (2) form the heat exhaust holes (h).

6. The pot support according to claim 5, characterized in that: Both ends of the recessed structure (311) extend to the top of the air supply ring (1) and the peripheral portion of the cavity shell (3) located at the edge sealing portion (31), respectively. The recessed degree of the recessed structure (311) gradually deepens from both sides toward the middle.

7. The pot support according to claim 3, characterized in that: The cavity shell (3) further comprises a ring portion (32) bent downward and extending from the outer edge of the energy-gathering disk (2), and a disk portion (33) extending toward the periphery from the edge sealing portion (31); the ring portion (32) and the disk portion (33) seal the cavity shell (3).

8. The pot support according to any one of claims 1 to 7, characterized in that: The outer edge of the energy gathering disk (2) is higher than the inner edge, and the portion of the energy gathering disk (2) having a height change transitions in an arc shape.

9. The pot support according to any one of claims 1 to 7, characterized in that: The inner edge of the energy-gathering disk (2) has a guide ring (23) that bends downward and extends.

10. The pot support according to any one of claims 1 to 7, characterized in that: The energy-gathering disk (2) is formed with a step structure (24) along the circumferential direction at a portion close to the outer edge, a plurality of the brackets (51) are connected to a bracket ring (52), and the bracket ring (52) is arranged on the step structure (24).

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