Energy gathering ring and stove

Abstract

The utility model provides an energy-gathering ring and a stove, the upper surface of the energy-gathering ring is obliquely arranged from top to bottom in the direction from the radial outer side to the radial inner side of the energy-gathering ring, and the lower surface of the energy-gathering ring is obliquely arranged from bottom to top; the radial outer side face of the energy gathering ring is an arc face protruding in the direction away from the center of the energy gathering ring. The upper surface of the energy-gathering ring can be used as an extension surface of flame, the direction of the flame is guided, the covering area of the flame in the horizontal direction is increased, and the cookware is heated more uniformly. Under the coanda effect, the high-temperature smoke can be close to the radial outer side face of the arc-shaped energy gathering ring and flow along the radial outer side face of the energy gathering ring so as to heat secondary air near the radial outer side face of the energy gathering ring. The heated secondary air is guided by the lower surface of the energy gathering ring to flow to the center of the energy gathering ring and is provided for a fire cover of the combustor, and therefore the combustion efficiency of the combustor is improved, emission of carbon monoxide is reduced, and the energy gathering effect of the energy gathering ring is improved.

Description

Technical Field

[0001] The utility model relates to the field of stoves, in particular to an energy gathering ring and a stove. Background Art

[0002] Gas stoves are essential cooking appliances for daily life in the kitchen. Combustion thermal efficiency, as an important indicator of gas stoves, has received much attention from users. The pot holder on traditional gas stoves mainly supports the pots and does not have the function of gathering energy and preventing heat from dissipating. As the gas and gas appliance industry has entered a period of rapid development, the safety measures of household gas stoves have been continuously strengthened, and the materials, functions and performance of the stoves have been improved. With the advocacy of energy conservation and environmental protection, traditional pot holders can no longer meet the needs of energy conservation, so (energy-gathering ring) pot holders came into being.

[0003] Although a large number of energy-gathering ring pot brackets have appeared in the prior art, the energy-gathering effect of the energy-gathering ring pot brackets still has a lot of room for improvement. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defect that the energy gathering effect of the energy gathering ring in the prior art is not good, and to provide an energy gathering ring and a stove.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] An energy-gathering ring, used for a cooker, the energy-gathering ring is an annular structure and comprises an upper surface, a lower surface and a radial outer side surface;

[0007] Along the radial outer side to the radial inner side of the energy focusing ring, the upper surface of the energy focusing ring is inclined from top to bottom, and the lower surface of the energy focusing ring is inclined from bottom to top; the radial outer side surface of the energy focusing ring is an arc surface that is convex in the radial direction of the energy focusing ring toward a direction away from the center of the energy focusing ring;

[0008] The radial outer side surface of the energy focusing ring is arranged at one end of the upper surface of the energy focusing ring and the lower surface of the energy focusing ring away from the center of the energy focusing ring in the radial direction of the energy focusing ring, and the upper surface of the energy focusing ring, the radial outer side surface of the energy focusing ring and the lower surface of the energy focusing ring are connected end to end in sequence.

[0009] In this solution, the upper surface of the energy-gathering ring can serve as an extension surface of the flame, guiding the direction of the flame, increasing the area covered by the flame in the horizontal direction, and making the pot heated more evenly. Under the Coanda effect, the high-temperature flue gas will be close to the radial outer side of the arc-shaped energy-gathering ring and flow along the radial outer side of the energy-gathering ring to heat the secondary air near the radial outer side of the energy-gathering ring. The heated secondary air flows to the center of the energy-gathering ring under the guidance of the lower surface of the energy-gathering ring and is provided to the fire cover of the burner, thereby improving the combustion efficiency of the burner, reducing carbon monoxide emissions, and improving the energy-gathering effect of the energy-gathering ring. An expansion section is formed between the bottom surface of the pot and the upper half of the arc surface of the radial outer side of the energy-gathering ring. In the expansion section, the high-temperature flue gas will expand and increase pressure, thereby increasing the convective heat transfer coefficient with the bottom of the pot and improving the heat exchange effect with the bottom of the pot.

[0010] Preferably, along the radial direction of the energy focusing ring, the distance between the end of the radial outer side surface of the energy focusing ring farthest from the center of the energy focusing ring and the end of the radial outer side surface of the energy focusing ring closest to the center of the energy focusing ring is greater than or equal to 15 mm.

[0011] In this solution, the radial outer side width of the energy-gathering ring is greater than or equal to 15 mm, ensuring that the radial outer side of the energy-gathering ring is larger so that more high-temperature flue gas can be adsorbed on the radial outer side of the energy-gathering ring under the influence of the Coanda effect, thereby better heating the secondary air, increasing the temperature of the secondary air, and further making the gas burn more fully, thereby improving the combustion efficiency of the burner. Moreover, when the radial outer side width of the energy-gathering ring is greater than or equal to 15 mm, the expansion effect brought about by the expansion section formed between the bottom surface of the pot and the upper half of the radial outer side surface of the energy-gathering ring is more obvious, slowing down the discharge speed of the high-temperature flue gas, so that the high-temperature flue gas can stay at the bottom of the pot for a longer period of time, increasing the temperature of the bottom of the pot, and ultimately improving the thermal efficiency of the stove.

[0012] Preferably, along the radial direction of the energy focusing ring, the line connecting the end of the radial outer side surface of the energy focusing ring farthest from the center of the energy focusing ring and the end of the radial outer side surface of the energy focusing ring closest to the center of the energy focusing ring in the first plane is l, and the connecting line l forms an angle α with the horizontal plane, 35°≤α≤65°;

[0013] The first plane is perpendicular to the horizontal plane and passes through the center of the energy focusing ring.

[0014] In this scheme, when the vertical height of the energy focusing ring is the same, if the angle is too large, it means that the width of the radial outer side of the energy focusing ring is reduced, and a good pressure diffusion effect cannot be provided. If the angle is too small, the Coanda effect of the radial outer side of the energy focusing ring will be weakened, and the high-temperature flue gas adsorbed by the radial outer side of the energy focusing ring will be reduced. Therefore, when the angle α is in the range of 35°-65°, it can balance the pressure diffusion effect and the amount of high-temperature flue gas adsorbed, thereby achieving a higher energy focusing effect and thermal efficiency.

[0015] Preferably, the plane where the upper surface of the energy focusing ring is located and the line l form an angle β in the first plane, 80°≤β≤100°.

[0016] In this solution, the size of β is related to the slope of the upper surface and the lower surface of the energy focusing ring. The larger the β angle is, the smaller the slope of the upper surface and the lower surface of the energy focusing ring is, and the smaller β is, the larger the slope of the upper surface and the lower surface of the energy focusing ring is. By setting the angle of β, the slope of the upper surface and the lower surface of the energy focusing ring is adjusted, so that the upper surface of the energy focusing ring can better guide the flame, and the lower surface of the energy focusing ring can better guide the secondary air.

[0017] A stove comprises an outer ring fire cover and the energy gathering ring as described above, wherein the energy gathering ring is concentrically sleeved on the radial outer side of the outer ring fire cover.

[0018] Preferably, the outer ring fire cover includes a fire outlet hole, and the angle between the plane where the upper surface of the energy-gathering ring is located and the horizontal plane is γ 1 The angle between the central axis of the fire hole and the horizontal plane is γ 2 , 0≤γ 2 -γ 1 ≤3°.

[0019] In this solution, by controlling the slope of the upper surface of the energy-gathering ring within a reasonable range, the guiding effect of the upper surface of the energy-gathering ring on the flame is ensured, so that the flame can be spread evenly, ensuring that the bottom of the pot can be heated evenly, thereby improving the combustion efficiency. The slope of the upper surface of the energy-gathering ring should not be designed to be too small to prevent the flame angle from expanding too much, thereby wrapping the flame and high-temperature flue gas in a semi-open state. After the heated secondary air enters the center of the energy-gathering ring, it can be mixed with the high-temperature flue gas, so that the gas can be fully burned and heat loss can be reduced.

[0020] Preferably, the outer ring fire cover includes a fire outlet hole, and a boundary line between an extension surface of the upper surface of the energy gathering ring and an extension surface of the lower surface of the energy gathering ring is located above the fire outlet hole.

[0021] In this solution, the above arrangement is used to prevent the flame from being completely located above the upper surface of the energy focusing ring, thereby ensuring that the upper surface of the energy focusing ring can play a role in guiding the direction of the flame.

[0022] Preferably, the height difference in the vertical direction between the boundary line of the extended surface of the upper surface of the energy focusing ring and the extended surface of the lower surface of the energy focusing ring and the center of the ignition port of the ignition hole is h, and 2mm≤h≤5mm.

[0023] In this solution, the above setting controls the range of h to avoid the flame directly colliding with the energy focusing ring due to h being too large, thereby reducing the service life of the energy focusing ring. At the same time, it avoids the flame propagating too fast due to h being too small, resulting in heat loss, weakened containment effect, and reduced combustion efficiency.

[0024] Preferably, the stove also includes an outer ring air mixing chamber, which is fixed to the lower end of the outer ring fire cover. The lower end of the outer ring air mixing chamber has a supporting portion, and the diameter of the supporting portion is larger than the diameter of the outer ring fire cover. A lower air inlet channel is formed between the upper surface of the supporting portion and the lower surface of the energy gathering ring.

[0025] In this solution, an inclined lower air inlet channel is formed between the upper surface of the support portion and the lower surface of the energy focusing ring, which guides the secondary air into the interior of the energy focusing ring and provides it to the fire cover of the burner, thereby improving the combustion efficiency of the burner.

[0026] Preferably, the radial outer side surface of the support portion is an inclined surface; along the radial outer side to the radial inner side of the energy gathering ring, the inclined surface is inclined from bottom to top, and the lower air inlet channel is formed between the inclined surface and the lower surface of the energy gathering ring;

[0027] The angle between the lower surface of the energy-gathering ring and the horizontal plane is δ 1 , the angle between the inclined surface and the horizontal plane is δ 2 , -5°≤δ 1 -δ 2 ≤5°.

[0028] In this solution, the lower surface of the energy gathering ring is substantially flush with the inclined surface of the support portion to facilitate the flow of secondary air.

[0029] The positive and progressive effect of the utility model is that the upper surface of the energy-gathering ring can serve as the extension surface of the flame, guide the direction of the flame, increase the area covered by the flame in the horizontal direction, and make the pot heated more evenly. Under the Coanda effect, the high-temperature flue gas will be close to the radial outer side of the arc-shaped energy-gathering ring and flow along the radial outer side of the energy-gathering ring to heat the secondary air near the radial outer side of the energy-gathering ring. The heated secondary air flows to the center of the energy-gathering ring under the guidance of the lower surface of the energy-gathering ring and is provided to the fire cover of the burner, thereby improving the combustion efficiency of the burner, reducing carbon monoxide emissions, and improving the energy-gathering effect of the energy-gathering ring. An expansion section is formed between the bottom surface of the pot and the upper half of the arc surface of the radial outer side of the energy-gathering ring. In the expansion section, the high-temperature flue gas will expand and increase the pressure, thereby increasing the convective heat transfer coefficient with the bottom of the pot and improving the heat exchange effect with the bottom of the pot. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a three-dimensional structural schematic diagram of a part of a stove according to an embodiment of the present utility model.

[0031] Figure 2 Another three-dimensional structural schematic diagram of a portion of a stove according to an embodiment of the utility model.

[0032] Figure 3 The figure is a schematic diagram of the internal structure of a part of a stove according to an embodiment of the present utility model.

[0033] Figure 4 It is a schematic diagram of the three-dimensional structure of a burner according to an embodiment of the utility model.

[0034] Figure 5 The figure is a schematic diagram of the three-dimensional structure of a pot support according to an embodiment of the utility model.

[0035] Figure 6 This is another three-dimensional structural schematic diagram of a pot support according to an embodiment of the present invention.

[0036] Figure 7 The figure is a schematic top view of the structure of a pot support according to an embodiment of the utility model.

[0037] Figure 8 for Figure 3 Enlarged view of part A.

[0038] Description of reference numerals:

[0039] Burner 1

[0040] Inner ring fire cover 11

[0041] Outer ring fire cover 12

[0042] Fire outlet hole 121 of outer ring fire cover

[0043] Inner ring mixing chamber 13

[0044] Outer ring mixing chamber 14

[0045] Supporting portion 141

[0046] Inclined surface 1411

[0047] Pot support 2

[0048] Energy Circle 21

[0049] The upper surface of the energy-gathering ring 211

[0050] The lower surface of the energy-gathering ring 212

[0051] The radial outer side surface 213 of the energy-gathering ring

[0052] Pot feet 22

[0053] Liquid tray 3 DETAILED DESCRIPTION

[0054] The present invention is further described below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0055] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0056] like Figure 1-Figure 3 As shown, this embodiment discloses a stove, which is a gas stove that uses liquefied gas or natural gas to generate an open flame and is used for cooking. The stove includes a burner 1, a pot support 2 and a liquid receiving pan 3, the pot support 2 and the liquid receiving pan 3 are both sleeved on the outer peripheral side of the burner 1, and the pot support 2 is placed on the liquid receiving pan 3.

[0057] like Figure 1-Figure 4 As shown, the burner 1 includes an inner ring fire cover 1111, an outer ring fire cover 12, an inner ring gas mixing chamber 13 and an outer ring gas mixing chamber 14. The outer ring fire cover 12 is concentrically sleeved on the radial outer side of the inner ring fire cover 1111, the inner ring gas mixing chamber 13 is fixed to the lower end of the inner ring fire cover 1111, and the outer ring gas mixing chamber 14 is fixed to the lower end of the outer ring fire cover 12. A plurality of fire holes are provided on the inner ring fire cover 1111 and the outer ring fire cover 12 to generate flames. The energy focusing ring 21 is concentrically sleeved on the radial outer side of the outer ring fire cover 12 to improve the combustion efficiency of the flame.

[0058] like Figure 5-Figure 7As shown, the pot support 2 includes an energy gathering ring 21 and pot legs 22. The energy gathering ring 21 in this embodiment is an annular hollow structure, that is, an annular cavity is formed inside the energy gathering ring 21, and the overall annular cavity can gather high-temperature flue gas, keep warm and insulate, reduce heat loss, and improve combustion thermal efficiency. There are multiple pot legs 22, and multiple pot supports 2 are arranged at intervals along the circumference of the energy gathering ring 21. The pot legs 22 are wrapped around the energy gathering ring 21 from the outer peripheral side of the energy gathering ring 21 to prevent the pot legs 22 from affecting the energy gathering effect of the energy gathering ring 21. The upper end of the pot legs 22 is higher than the energy gathering ring 21 to support the pot. The lower end of the pot legs 22 is lower than the energy gathering ring 21 and is installed on the upper surface of the liquid receiving tray 3.

[0059] In other alternative embodiments, the energy focusing ring 21 may also be a solid structure.

[0060] like Figure 5-Figure 7 As shown, the energy focusing ring 21 includes an upper surface, a lower surface and a radially outer side surface. Along the radial outer side to the radial inner side of the energy focusing ring 21, the upper surface 211 of the energy focusing ring is inclined from top to bottom, and the lower surface 212 of the energy focusing ring is inclined from bottom to top. The radially outer side surface 213 of the energy focusing ring is an arc surface that is convex in the radial direction of the energy focusing ring 21 in the direction away from the center of the energy focusing ring 21. The radially outer side surface 213 of the energy focusing ring is provided at one end of the upper surface 211 of the energy focusing ring and the lower surface 212 of the energy focusing ring in the radial direction of the energy focusing ring 21 away from the center of the energy focusing ring 21, and the upper surface 211 of the energy focusing ring, the radially outer side surface 213 of the energy focusing ring and the lower surface 212 of the energy focusing ring are connected end to end in sequence.

[0061] In this embodiment, the upper surface 211 of the energy-gathering ring can serve as an extension surface of the flame, guide the direction of the flame, increase the area covered by the flame in the horizontal direction, and make the pot heated more evenly. Under the Coanda effect, the high-temperature flue gas will be close to the radial outer side surface 213 of the arc-shaped energy-gathering ring and flow along the radial outer side surface 213 of the energy-gathering ring to heat the secondary air near the radial outer side surface 213 of the energy-gathering ring. The heated secondary air flows to the center of the energy-gathering ring 21 under the guidance of the lower surface 212 of the energy-gathering ring and is provided to the fire cover of the burner 1, thereby improving the combustion efficiency of the burner 1, reducing the emission of carbon monoxide, and improving the energy-gathering effect of the energy-gathering ring 21. An expansion section is formed between the bottom surface of the pot and the upper half of the arc surface of the radial outer side surface 213 of the energy-gathering ring. In the expansion section, the high-temperature flue gas will expand and increase the pressure, thereby increasing the convection heat transfer coefficient with the bottom of the pot and improving the heat exchange effect with the bottom of the pot.

[0062] In addition, the radial outer side surface 213 of the arc-shaped energy-gathering ring is also convenient for users to scrub and clean.

[0063] Specifically, Figure 8 As shown, the angle between the plane where the upper surface 211 of the energy-gathering ring is located and the horizontal plane is γ 1, the angle between the central axis of the fire hole and the horizontal plane is γ 2 , this embodiment satisfies 0≤γ 2 -γ 1 ≤3°, so as to control the slope of the upper surface 211 of the energy-gathering ring within a reasonable range, ensure the guiding effect of the upper surface 211 of the energy-gathering ring on the flame, so that the flame can be evenly spread, ensure that the bottom of the pot can be evenly heated, and thus improve the combustion efficiency. The slope of the upper surface 211 of the energy-gathering ring should not be designed to be too small to prevent the flame angle from being excessively expanded, thereby wrapping the flame and the high-temperature flue gas in a semi-open state, and the heated secondary air can be mixed with the high-temperature flue gas after entering the center of the energy-gathering ring 21, so that the gas can be fully burned and the heat loss can be reduced.

[0064] Furthermore, if Figure 8 As shown, the boundary line between the extended surface of the upper surface 211 of the energy focusing ring and the extended surface of the lower surface 212 of the energy focusing ring is located above the fire outlet hole 121 of the outer ring fire cover, preventing the flame from being completely located above the upper surface 211 of the energy focusing ring, ensuring that the upper surface 211 of the energy focusing ring can play a role in guiding the direction of the flame.

[0065] Specifically, Figure 8 As shown, the vertical height difference between the boundary line of the extended surface of the upper surface 211 of the energy focusing ring and the extended surface of the lower surface 212 of the energy focusing ring and the center of the fire outlet hole 121 of the outer ring fire cover is h, and this embodiment satisfies 2mm≤h≤5mm, thereby avoiding the flame directly colliding with the energy focusing ring 21 and reducing the service life of the energy focusing ring 21 due to the excessive height difference between the two, and at the same time avoiding the flame propagating too fast due to the small height difference between the two, resulting in heat loss, weakened containment effect and reduced combustion efficiency.

[0066] like Figure 8 As shown, along the radial direction of the energy gathering ring 21, the distance L between the end of the radial outer side surface 213 of the energy gathering ring farthest from the center of the energy gathering ring 21 and the end of the radial outer side surface 213 of the energy gathering ring closest to the center of the energy gathering ring 21 is greater than or equal to 15 mm, ensuring that the radial outer side surface 213 of the energy gathering ring is larger so that more high-temperature flue gas can be adsorbed on the radial outer side surface 213 of the energy gathering ring under the influence of the Coanda effect, thereby better heating the secondary air, increasing the temperature of the secondary air, and then making the gas burn more fully, thereby improving the combustion efficiency of the burner 1. Moreover, when the width of the radial outer side surface 213 of the energy gathering ring is greater than or equal to 15 mm, the expansion effect brought about by the expansion section formed between the bottom surface of the pot and the upper half of the arc surface of the radial outer side surface 213 of the energy gathering ring is more obvious, slowing down the discharge speed of the high-temperature flue gas, so that the high-temperature flue gas can stay at the bottom of the pot for a longer period of time, increasing the temperature of the pot bottom, and ultimately improving the thermal efficiency of the stove.

[0067] like Figure 7and Figure 8 As shown, along the radial direction of the energy focusing ring 21, the line connecting the end of the radial outer side surface 213 of the energy focusing ring farthest from the center of the energy focusing ring 21 and the end of the radial outer side surface 213 of the energy focusing ring closest to the center of the energy focusing ring 21 in the first plane (the first plane is perpendicular to the horizontal plane and passes through the center of the energy focusing ring 21) is l, and the line l forms an angle α with the horizontal plane, 35°≤α≤65°. When the vertical height of the energy focusing ring 21 is the same, if the angle α is greater than 65°, it means that the width of the radial outer side surface 213 of the energy focusing ring is reduced, and a good pressure diffusion effect cannot be provided. If the angle α is less than 35°, the Coanda effect of the radial outer side surface 213 of the energy focusing ring will be weakened, and the high-temperature flue gas adsorbed by the radial outer side surface 213 of the energy focusing ring will be reduced. Therefore, when the angle α is within the range of 35°-65°, the pressure diffusion effect and the amount of adsorbed high-temperature flue gas can be balanced, thereby achieving a higher energy focusing effect and thermal efficiency.

[0068] like Figure 8 As shown, the plane where the upper surface 211 of the energy focusing ring is located and the connecting line l form an angle β in the first plane, and the size of β is related to the slope of the upper surface 211 of the energy focusing ring and the lower surface 212 of the energy focusing ring. The larger the angle β, the smaller the slope of the upper surface 211 of the energy focusing ring and the lower surface 212 of the energy focusing ring, and the smaller β, the larger the slope of the upper surface 211 of the energy focusing ring and the lower surface 212 of the energy focusing ring. This embodiment satisfies 80°≤β≤100°. By setting the angle β, the slopes of the upper surface 211 of the energy focusing ring and the lower surface 212 of the energy focusing ring are adjusted, so that the upper surface 211 of the energy focusing ring can better guide the flame, and the lower surface 212 of the energy focusing ring can better guide the secondary air.

[0069] Furthermore, if Figure 3 and Figure 4 As shown, the lower end of the outer ring mixing chamber 14 has a support portion 141, the diameter of the support portion 141 is larger than the diameter of the outer ring fire cover 12, and a lower air inlet channel is formed between the upper surface of the support portion 141 and the lower surface 212 of the energy focusing ring. Specifically, the radial outer side surface of the support portion 141 is an inclined surface 1411, and the inclined surface 1411 is inclined from bottom to top along the radial outer side to the radial inner side of the energy focusing ring 21, and a lower air inlet channel is formed between the inclined surface 1411 and the lower surface 212 of the energy focusing ring. An inclined lower air inlet channel is formed between the inclined surface 1411 of the support portion 141 and the lower surface 212 of the energy focusing ring, which guides the secondary air to the inside of the energy focusing ring 21 and provides it to the fire cover of the burner 1, thereby improving the combustion efficiency of the burner 1.

[0070] like Figure 8 As shown, the angle between the lower surface 212 of the energy-gathering ring and the horizontal plane is δ 1 , the angle between the inclined surface 1411 and the horizontal plane is δ 2, this embodiment satisfies -5°≤δ 1 -δ 2 ≤5°, that is, the angle difference between the two is between ±5°, and the smaller the angle difference between the two is, the better, and the lower surface 212 of the energy focusing ring is ensured to be flush with the inclined surface 1411 of the support portion 141 as much as possible to facilitate the flow of secondary air.

[0071] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship of the device or element in normal use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation at any time, and therefore cannot be understood as a limitation on the present invention in this regard.

[0072] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. An energy-gathering ring for a stove, characterized in that: The energy gathering ring is an annular structure and includes an upper surface, a lower surface and a radial outer side surface; Along the radial outer side to the radial inner side of the energy focusing ring, the upper surface of the energy focusing ring is inclined from top to bottom, and the lower surface of the energy focusing ring is inclined from bottom to top; the radial outer side surface of the energy focusing ring is an arc surface that is convex in the radial direction of the energy focusing ring toward a direction away from the center of the energy focusing ring; The radial outer side surface of the energy focusing ring is arranged at one end of the upper surface of the energy focusing ring and the lower surface of the energy focusing ring away from the center of the energy focusing ring in the radial direction of the energy focusing ring, and the upper surface of the energy focusing ring, the radial outer side surface of the energy focusing ring and the lower surface of the energy focusing ring are connected end to end in sequence.

2. The energy-gathering ring according to claim 1, characterized in that: Along the radial direction of the energy focusing ring, the distance between the end of the radial outer side of the energy focusing ring farthest from the center of the energy focusing ring and the end of the radial outer side of the energy focusing ring closest to the center of the energy focusing ring is greater than or equal to 15 mm.

3. The energy-gathering ring according to claim 2, characterized in that: Along the radial direction of the energy focusing ring, the line connecting the end of the radial outer side surface of the energy focusing ring farthest from the center of the energy focusing ring and the end of the radial outer side surface of the energy focusing ring closest to the center of the energy focusing ring in the first plane is denoted as l, and the connecting line l forms an angle α with the horizontal plane, 35°≤α≤65°; The first plane is perpendicular to the horizontal plane and passes through the center of the energy focusing ring.

4. The energy-gathering ring according to claim 3, characterized in that: The plane where the upper surface of the energy gathering ring is located and the connecting line l form an angle β in the first plane, 80°≤β≤100°.

5. A cooking appliance, characterized in that: The stove comprises an outer ring fire cover and an energy gathering ring as described in any one of claims 1 to 4, wherein the energy gathering ring is concentrically sleeved on the radial outer side of the outer ring fire cover.

6. The cooker according to claim 5, characterized in that: The outer ring fire cover includes a fire outlet hole. The angle between the plane where the upper surface of the energy focusing ring is located and the horizontal plane is γ1, and the angle between the central axis of the fire outlet hole and the horizontal plane is γ2, 0≤γ2-γ1≤3°.

7. The cooker according to claim 5, characterized in that: The outer ring fire cover comprises a fire outlet hole, and a boundary line between an extension surface of the upper surface of the energy gathering ring and an extension surface of the lower surface of the energy gathering ring is located above the fire outlet hole.

8. The cooker according to claim 7, characterized in that: The height difference in the vertical direction between the boundary line of the extended surface of the upper surface of the energy focusing ring and the extended surface of the lower surface of the energy focusing ring and the center of the ignition port of the ignition hole is h, 2mm≤h≤5mm.

9. The cooker according to claim 5, characterized in that: The stove also includes an outer ring air mixing chamber, which is fixed to the lower end of the outer ring fire cover. The lower end of the outer ring air mixing chamber has a support portion, the diameter of the support portion is larger than the diameter of the outer ring fire cover, and a lower air inlet channel is formed between the upper surface of the support portion and the lower surface of the energy gathering ring.

10. The cooker according to claim 9, characterized in that: The radial outer side surface of the support portion is an inclined surface; along the radial outer side to the radial inner side of the energy gathering ring, the inclined surface is inclined from bottom to top, and the lower air inlet channel is formed between the inclined surface and the lower surface of the energy gathering ring; The angle between the lower surface of the energy-gathering ring and the horizontal plane is δ1, the angle between the inclined surface and the horizontal plane is δ2, and -5°≤δ1-δ2≤5°.

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