Energy gathering ring and gas stove

Abstract

The invention relates to the technical field of gas stoves, and discloses an energy-gathering ring and a gas stove.The energy-gathering ring comprises a main body part, an energy-gathering ring body and an energy-gathering ring body, and the closing plate downwards protrudes out of the main body part, and the closing plate is suitable for closing a gap between the lower side of the main body part and the gas stove panel. According to the energy-gathering ring, the closing plate is arranged and protrudes out of the main body part downwards, after the energy-gathering ring is placed on a panel of the gas stove, the closing plate can close a gap between the lower side of the main body part and the panel, and smoke is prevented from flowing out of the gap between the lower side of the main body part and the panel; therefore, the amount of high-temperature smoke which escapes out of the heat exchange area without heat exchange with the cookware is reduced, heat loss is reduced, and the full-premixing type gas stove achieves the expected heat efficiency target.

Description

Technical Field

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

[0002] The combustion principle of the full premix gas stove is that the fuel is mixed with air in the ejector tube, and the mixed gas is ignited after being ejected from the fire hole to produce a chemical reaction and release heat. The full premix gas stove in the related art has the problem that the energy gathering ring is not enough to gather energy, and the heat of fuel combustion will be partially lost and cannot be fully utilized, thus resulting in low thermal efficiency. Summary of the invention

[0003] In view of this, the present invention provides an energy gathering ring and a gas stove to solve the problem of low thermal efficiency of the full premix gas stove.

[0004] In a first aspect, the present invention provides an energy-gathering ring, comprising:

[0005] The main body is annular;

[0006] A closing plate protrudes downward from the main body, and is suitable for closing a gap between the lower side of the main body and the gas stove panel.

[0007] Beneficial effect: By setting a closing plate, the closing plate protrudes downward from the main body. When the energy gathering ring is placed on the panel of the gas stove, the closing plate can close the gap between the lower side of the main body and the panel, preventing smoke from flowing out from the gap between the lower side of the main body and the panel, thereby reducing the amount of high-temperature smoke that escapes from the heat exchange area without exchanging heat with the cookware, thereby reducing heat loss, and enabling the fully premixed gas stove to achieve the expected thermal efficiency target.

[0008] In an optional embodiment, the energy focusing ring is suitable for surrounding the outer side of the burner head, and the inner periphery of the closing plate is suitable for being close to the burner head.

[0009] Beneficial effect: Since the inner periphery of the closing plate is close to the burner head, the size of the combustion heat exchange space in the energy gathering circle can be controlled, thereby improving the flue gas heat exchange efficiency.

[0010] In an optional embodiment, the energy gathering ring further includes a support foot, the support foot is connected to the bottom surface of the main body, and the support foot is suitable for being placed in a positioning groove of a gas stove panel.

[0011] Beneficial effect: By setting the support feet, the positioning grooves of the gas stove panel can position the support feet, making it easy to correctly place the energy gathering ring on the gas stove panel.

[0012] In an optional embodiment, the outer periphery of the closing plate is connected to each of the supporting feet.

[0013] Beneficial effects: Since the closing plate is connected to each support leg, the closing plate and the support leg are connected as one piece, which is convenient for processing and can ensure the balance of the entire energy gathering circle.

[0014] In an optional embodiment, a spoiler structure is provided on the upper surface of the main body near the edge.

[0015] Beneficial effect: By arranging a spoiler structure on the upper surface of the main body and near the edge, the local flue gas flow velocity and turbulence intensity can be increased without changing the overall flow direction of the flue gas, thereby increasing the convective heat transfer coefficient here and then increasing the heat transfer at the edge of the bottom of the pot, thereby achieving the purpose of improving the uniformity of heat transfer at the bottom of the pot.

[0016] In an optional embodiment, the spoiler structure includes at least one annular protrusion.

[0017] Beneficial effect: The turbulent structure includes at least one annular protrusion. When the high-temperature flue gas flows radially from the inside to the outside, the annular protrusion can enhance the disturbance of the flue gas, increase the local flue gas flow rate and turbulence intensity without changing the overall flow direction of the flue gas, thereby increasing the convective heat transfer coefficient here and then improving the heat transfer at the edge of the bottom of the pot, thereby achieving the purpose of improving the uniformity of heat transfer at the bottom of the pot.

[0018] In an optional implementation, the height of the annular protrusion is H1, 1mm≤H1≤1.5mm.

[0019] Beneficial effect: If the height of the annular protrusion is less than 1mm, the annular protrusion is not easy to process and the effect is not obvious. If the height of the annular protrusion is higher than 1.5mm, it is easy to cause the smoke speed to be too fast and change the direction of smoke flow. Therefore, the height of the annular protrusion is between 1mm and 1.5mm, which is easy to process and will not cause the smoke speed to be too fast. Without changing the overall flow direction of the smoke, the local smoke flow rate and turbulence intensity are increased, thereby increasing the convective heat transfer coefficient here and then increasing the heat exchange at the edge of the bottom of the pot, so as to achieve the purpose of improving the uniformity of heat transfer at the bottom of the pot.

[0020] In an optional implementation, the distance between two adjacent annular protrusions is L1, and L1≥2H1.

[0021] Beneficial effect: If the distance between two adjacent annular protrusions is too small, the heat exchange space will be reduced. Therefore, the distance between two adjacent annular protrusions is greater than or equal to twice the height of the annular protrusion, so that the annular protrusion can improve the convective heat transfer coefficient and thus increase the convective heat transfer amount, thereby improving the uniformity of heat transfer at the bottom of the pot. In an optional embodiment, the spoiler structure includes a plurality of annular protrusions, and the plurality of annular protrusions are evenly distributed.

[0022] Beneficial effect: The turbulent structure includes a plurality of evenly distributed annular protrusions. When the high-temperature flue gas flows radially from the inside to the outside, the heat exchange rate will be lower due to the lower flue gas temperature near the edge. The annular protrusions can enhance the disturbance of the flue gas, increase the local flue gas flow rate and turbulence intensity without changing the overall flow direction of the flue gas, thereby increasing the convective heat transfer coefficient here and thus increasing the heat exchange rate at the edge of the pot bottom, thereby achieving the purpose of improving the uniformity of heat transfer at the pot bottom.

[0023] In an optional embodiment, the main body includes an annular top surface, the annular top surface is horizontally arranged, and the spoiler structure is arranged on the annular top surface.

[0024] Beneficial effects: The main body includes an annular top surface, and the space between the annular top surface and the bottom of the pot is small, which can increase the flue gas velocity at the edge of the bottom of the pot, thereby improving the heat exchange at the edge of the bottom of the pot. The turbulent flow structure is arranged on the annular top surface, which can enhance the disturbance of the flue gas, increase the local flue gas flow rate and turbulence intensity without changing the overall flow direction of the flue gas, thereby increasing the convective heat transfer coefficient here and then improving the heat exchange at the edge of the bottom of the pot, thereby achieving the purpose of improving the uniformity of heat transfer at the bottom of the pot.

[0025] In an optional embodiment, the energy focusing ring further includes a bracket disposed on the main body, and the height of the bracket is H2, 3.5mm≤H2≤5mm.

[0026] Beneficial effect: The height of the bracket is between 3.5mm and 5mm, which can control the size of the combustion heat exchange space in the energy-gathering circle, maintain a high flue gas velocity and thus improve the flue gas heat exchange efficiency.

[0027] In a second aspect, the present invention further provides a gas stove, comprising:

[0028] stove top;

[0029] The energy gathering circle.

[0030] Beneficial effect: The energy gathering ring is provided with a closing plate, which protrudes downward from the main body. The closing plate can close the gap between the lower side of the main body and the panel to prevent smoke from flowing out from the gap between the lower side of the main body and the panel, thereby reducing the amount of high-temperature smoke that escapes from the heat exchange area without exchanging heat with the cookware, thereby reducing heat loss, and enabling the fully premixed gas stove to achieve the expected thermal efficiency target.

[0031] In an optional implementation, the distance between the energy focusing ring and the furnace head is L2, and L2 is less than 3 mm.

[0032] Beneficial effect: The distance between the energy-gathering ring and the burner head is less than 3 mm, which can control the size of the combustion and heat exchange space in the energy-gathering ring, maintain a high flue gas velocity and thus improve the flue gas heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is a temperature distribution cloud diagram of the cross section of a full premix gas stove using a related technology energy-gathering ring;

[0035] Figure 2 This is a cloud diagram of the temperature distribution at the bottom of a fully premixed gas stove using a related technology energy-gathering ring;

[0036] Figure 3 This is a cloud diagram of the velocity distribution of the bottom of a fully premixed gas stove using a related technology energy-gathering ring;

[0037] Figure 4 This is a cloud diagram of the heat transfer distribution of the bottom of a fully premixed gas stove using a related technology energy-gathering ring;

[0038] Figure 5 This is a schematic structural diagram of an energy-gathering ring according to an embodiment of the present invention;

[0039] Figure 6 A front view of an energy-gathering ring according to an embodiment of the present invention;

[0040] Figure 7 A top view of an energy-gathering ring according to an embodiment of the present invention;

[0041] Figure 8 A perspective view of a gas stove according to an embodiment of the present invention;

[0042] Fig. 9 The cloud diagram of the temperature distribution of the pot bottom when the energy-gathering ring of the related art and the energy-gathering ring of the embodiment of the present invention are used respectively under the same working conditions;

[0043] Fig.10 The cloud diagrams of the velocity distribution of the pan bottom when the energy-gathering ring of the related art and the energy-gathering ring of the embodiment of the present invention are used respectively under the same working conditions;

[0044] Fig.11 It is a comparison diagram of the heat transfer cloud diagram of the pot bottom when the energy-gathering ring of the related technology and the energy-gathering ring of the embodiment of the present invention are used respectively under the same working conditions.

[0045] Description of reference numerals:

[0046] 1. Energy gathering ring; 101. Main body; 1011. Peripheral wall; 1012. Annular bottom wall; 1013. Annular top surface; 1014. Inner wall; 102. Support foot; 103. Closing plate; 104. Annular protrusion; 105. Bracket; 2. Burner head. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] The combustion principle of a fully premixed gas stove is that the fuel is mixed with the air in the ejector tube, and the mixed gas is ignited after being ejected from the fire hole to undergo a chemical reaction and release heat. The combustion principle of an atmospheric gas stove is that the fuel is injected into the ejector tube at high speed and mixed with the primary air injected in, and the mixed gas is ignited after being ejected from the fire hole to undergo partial combustion, and the combustion products are then mixed with the secondary air entering through the secondary air inlet to achieve complete combustion. In the related art, fully premixed gas stoves and atmospheric gas stoves often use the same energy-gathering ring. For fully premixed gas stoves, since the same energy-gathering ring as the atmospheric gas stove is used, and the fully premixed gas stove does not require secondary air to enter, the gap between the energy-gathering ring and the panel will cause unnecessary heat loss, resulting in the fully premixed gas stove failing to achieve the expected thermal efficiency target.

[0051] Furthermore, numerical simulation was used to simulate the gas mixing, combustion heat release and flue gas flow process during the operation of the full premix gas stove. It was found that part of the high-temperature flue gas was ejected from the gap under the energy-gathering ring. Figure 1 , Figure 1 The position indicated by the middle arrow represents that part of the flue gas is ejected from the gap on the lower side of the energy focusing ring, resulting in this part of the high-temperature flue gas not participating in the heat exchange process with the bottom of the pot, causing heat loss.

[0052] In addition, the combustion of fuel generates high-temperature flue gas, which exchanges heat with the center of the pot bottom, causing the temperature to drop. As the radial movement space of the high-temperature flue gas gradually increases and the flue gas velocity gradually decreases, the lower flue gas temperature and flue gas velocity at the edge of the pot bottom together cause the heat transfer in this area to decrease. Figure 2 , Figure 3 and Figure 4 , Figure 2 This is a cloud diagram of the temperature distribution at the bottom of a fully premixed gas stove in the related art. Figure 3 It is a cloud diagram of the velocity distribution of the bottom of the fully premixed gas stove in the related art. Figure 4 The heat transfer distribution cloud map of the bottom of the fully premixed gas stove in the related technology. When analyzing the temperature cloud map, velocity cloud map and heat transfer cloud map of the bottom of the pot, it is found that the temperature, velocity and heat transfer in the central area of ​​the bottom of the pot are higher, while the temperature, velocity and heat transfer at the edge of the bottom of the pot are lower. It is calculated that the heat transfer of the bottom of the pot is the most important factor affecting the thermal efficiency of the gas stove, and the convection heat transfer is the most important factor affecting the heat transfer of the bottom of the pot. It can be seen from the convection heat transfer calculation formula Q = h*A*Δt that when the heat exchange area of ​​the bottom of the pot is constant, it is necessary to increase the convection heat transfer coefficient or the flue gas temperature to increase the convection heat transfer. The factors that affect the size of the convection heat transfer coefficient mainly include fluid properties, fluid flow state, flow velocity, ambient pressure and temperature. Under the normal working conditions of the household gas stove, the means to effectively improve the convection heat transfer coefficient is to increase the flue gas flow rate.

[0053] Combine the following Figures 1 to 11, describing an embodiment of the present invention.

[0054] According to an embodiment of the present invention, on one hand, an energy focusing ring 1 is provided, comprising a main body 101 and a closing plate 103 .

[0055] The main body 101 is annular; the closing plate 103 protrudes downward from the main body 101, and the closing plate 103 is suitable for closing the gap between the lower side of the main body 101 and the gas stove panel.

[0056] In this embodiment, a closing plate 103 is provided, which protrudes downward from the main body 101. After the energy gathering ring 1 is placed on the panel of the gas stove, the closing plate 103 can close the gap between the lower side of the main body 101 and the panel, thereby preventing smoke from flowing out from the gap between the lower side of the main body 101 and the panel, thereby reducing the amount of high-temperature smoke that escapes from the heat exchange area without exchanging heat with the cookware, thereby reducing heat loss, and enabling the fully premixed gas stove to achieve the expected thermal efficiency target.

[0057] Combination Figure 1 The gas mixing, combustion heat release and flue gas flow processes in the working process of the fully premixed gas stove of the relevant technology were simulated, and it was found that part of the high-temperature flue gas was ejected from the gap on the lower side of the energy gathering ring, resulting in this part of the high-temperature flue gas not participating in the heat exchange process with the bottom of the pot, causing heat loss. Figure 1 The pure white area in the figure represents the fluid has not passed through. The whiter the color in the simulation figure, the higher the temperature. Figure 1 It can be seen that the color of the gap below the energy-gathering ring on the right side of the burner is white, so it can be concluded that high-temperature smoke is ejected from here, which will cause heat loss. In this embodiment, a closing plate 103 is provided, and the closing plate 103 is connected to each support leg 102. The closing plate 103 protrudes downward from the main body 101. The closing plate 103 can close the gap between the lower side of the energy-gathering ring 1 and the panel to prevent smoke from flowing out of the gap between the lower side of the energy-gathering ring 1 and the panel, thereby reducing the amount of high-temperature smoke that escapes from the heat exchange area without exchanging heat with the pot, thereby reducing heat loss, and further enabling the full premix gas stove to achieve the expected thermal efficiency target.

[0058] It should be noted that the energy-gathering ring 1 is used for a fully premixed gas stove. The fuel is mixed with the air in the ejector tube. The mixed gas is ignited after being ejected from the fire hole to undergo a chemical reaction to release heat. No secondary air supply is required. Therefore, the closing plate 103 closes the gap between the main body 101 and the panel to ensure that the energy-gathering ring 1 can be tightly connected to the panel of the gas stove. After the cooker is placed on the gas stove, there is no other smoke outlet except the gap between the energy-gathering ring 1 and the bottom of the pot, thereby reducing the amount of high-temperature smoke that escapes from the heat exchange area without exchanging heat with the cooker, thereby reducing heat loss.

[0059] Specific as Figure 6 As shown, Figure 6This is a front view of the energy gathering ring 1 , from which it can be seen that the bottom of the energy gathering ring 1 is thickened by the closing plate 103 to prevent smoke from flowing out through the gap at the bottom of the energy gathering ring 1 .

[0060] In one embodiment, the closing plate 103 is annular.

[0061] Specifically in one embodiment, the main body 101 includes a peripheral wall 1011 and an annular bottom wall 1012 connected to the bottom of the peripheral wall 1011 , and the closing plate 103 is connected to the bottom surface of the annular bottom wall 1012 .

[0062] Specifically in one embodiment, the energy gathering ring 1 of this embodiment is an upward convex energy gathering ring. During the radial movement of the smoke, the energy gathering ring 1 gradually bulges to reduce the smoke flow space to increase the smoke velocity at the edge of the pot bottom, thereby improving the heat exchange at the edge of the pot bottom.

[0063] Specific as Figure 6 As shown, the cross-section of the inner wall 1014 of the main body 101 is an arc, and the arc is convex. From the inside to the outside along the radial direction, the tangent slope of the inner wall 1014 of the main body 101 gradually decreases, which can reduce the smoke flow space to increase the smoke velocity at the edge of the pot bottom, thereby increasing the heat exchange at the edge of the pot bottom and improving the heat transfer uniformity of the pot bottom.

[0064] In one embodiment, the energy focusing ring 1 is adapted to surround the outer side of the burner head, and the inner periphery of the closing plate 103 is adapted to be close to the burner head 2 .

[0065] In this embodiment, since the inner periphery of the closing plate 103 is close to the burner head 2, the size of the combustion and heat exchange space in the energy gathering ring 1 can be controlled, thereby improving the flue gas heat exchange efficiency.

[0066] In one embodiment, the energy gathering ring further includes a support leg 102 , which is connected to the bottom surface of the main body 101 , and the support leg 102 is suitable for being placed in a positioning groove of a gas stove panel.

[0067] In this embodiment, by providing the support legs 102, the positioning grooves of the gas stove panel can position the support legs 102, so as to facilitate the correct placement of the energy gathering ring 1 on the gas stove panel.

[0068] Specifically in one embodiment, the support leg 102 is connected to the bottom surface of the annular bottom wall 1012 .

[0069] Specifically in one embodiment, four supporting legs 102 are provided, and the four supporting legs 102 are evenly distributed along the circumferential direction.

[0070] In one embodiment, the outer periphery of the closing plate 103 is connected to each of the legs 102 .

[0071] In this embodiment, since the closing plate 103 is connected to each support leg 102 , the closing plate 103 and the support leg 102 are connected as one body, which is convenient for processing and can ensure the balance of the entire energy gathering ring 1 .

[0072] In one embodiment, a spoiler structure is provided on the upper surface of the main body 101 near the edge.

[0073] In this embodiment, by providing a spoiler structure on the upper surface of the main body 101 and near the edge, the local flue gas flow velocity and turbulence intensity can be increased without changing the overall flow direction of the flue gas, thereby increasing the convective heat transfer coefficient here and thereby increasing the heat transfer at the edge of the pot bottom, thereby achieving the purpose of improving the uniformity of heat transfer at the pot bottom.

[0074] In one embodiment, the spoiler structure includes at least one annular protrusion 104 .

[0075] In this embodiment, the spoiler structure includes at least one annular protrusion 104. When the high-temperature flue gas flows radially from the inside to the outside, the annular protrusion 104 can enhance the disturbance of the flue gas, increase the local flue gas flow rate and turbulence intensity without changing the overall flow direction of the flue gas, thereby increasing the convective heat transfer coefficient here and then improving the heat transfer at the edge of the pot bottom, thereby achieving the purpose of improving the uniformity of heat transfer at the pot bottom.

[0076] The temperature of the flue gas drops after exchanging heat with the bottom of the pot during its flow. The flue gas temperature at the edge of the energy focusing ring 1 is relatively low, resulting in a lower heat exchange amount. In this embodiment, an annular protrusion 104 is arranged near the edge of the energy focusing ring 1 to increase the convection heat transfer coefficient and thereby increase the convection heat transfer amount, thereby improving the uniformity of heat transfer at the bottom of the pot.

[0077] Specifically in one embodiment, a plurality of annular protrusions 104 are provided.

[0078] In one embodiment, the height of the annular protrusion 104 is H1, and 1 mm ≤ H1 ≤ 1.5 mm.

[0079] In this embodiment, if the height of the annular protrusion 104 is less than 1 mm, the annular protrusion 104 is difficult to process and its effect is not obvious. If the height of the annular protrusion 104 is higher than 1.5 mm, it is easy to cause the smoke velocity to be too fast and change the smoke flow direction. Therefore, the height of the annular protrusion 104 is between 1 mm and 1.5 mm, which is easy to process and will not cause the smoke velocity to be too fast. Without changing the overall flow direction of the smoke, the local smoke flow rate and turbulence intensity are increased, thereby increasing the convective heat transfer coefficient here and then increasing the heat exchange at the edge of the bottom of the pot, thereby achieving the purpose of improving the uniformity of heat transfer at the bottom of the pot.

[0080] Specifically in one embodiment, the height of the annular protrusion 104 is 1.3 mm.

[0081] In one embodiment, the distance between two adjacent annular protrusions 104 is L1, and L1≥2H1.

[0082] In this embodiment, if the distance between two adjacent annular protrusions 104 is too small, the heat exchange space will be reduced. Therefore, the distance between two adjacent annular protrusions 104 is greater than or equal to twice the height of the annular protrusion 104. The annular protrusion 104 can increase the convective heat transfer coefficient and thus increase the convective heat transfer amount, thereby improving the uniformity of heat transfer on the bottom of the pot.

[0083] In one embodiment, the spoiler structure includes a plurality of annular protrusions 104 , and the plurality of annular protrusions 104 are evenly distributed.

[0084] In this embodiment, the turbulence structure includes a plurality of evenly distributed annular protrusions 104. When the high-temperature flue gas flows radially from the inside to the outside, the heat exchange rate will be lower due to the lower flue gas temperature near the edge. The annular protrusions 104 can enhance the disturbance of the flue gas, increase the local flue gas flow rate and turbulence intensity without changing the overall flow direction of the flue gas, thereby increasing the convective heat transfer coefficient here and thus increasing the heat exchange rate at the edge of the pot bottom, thereby achieving the purpose of improving the uniformity of heat transfer at the pot bottom.

[0085] Specifically in one embodiment, the annular protrusions 104 are evenly distributed starting from the edge of the energy gathering ring 1 .

[0086] In one embodiment, the main body 101 includes an annular top surface 1013 , the annular top surface 1013 is horizontally arranged, and the spoiler structure is arranged on the annular top surface 1013 .

[0087] In this embodiment, the main body 101 includes an annular top surface 1013. The space between the annular top surface 1013 and the bottom of the pot is small, which can increase the flue gas velocity at the edge of the bottom of the pot, thereby improving the heat exchange at the edge of the bottom of the pot. The spoiler structure is arranged on the annular top surface 1013, which can enhance the disturbance of the flue gas. Under the premise of not changing the overall flow direction of the flue gas, the local flue gas flow rate and turbulence intensity are increased, thereby increasing the convective heat transfer coefficient here and then improving the heat exchange at the edge of the bottom of the pot, thereby achieving the purpose of improving the uniformity of heat transfer of the bottom of the pot.

[0088] The energy-gathering ring 1 further includes a bracket 105 disposed on the main body 101 , and the height of the bracket 105 is H2, 3.5 mm≤H2≤5 mm.

[0089] In this embodiment, the height of the bracket 105 is between 3.5 mm and 5 mm, which can control the size of the combustion and heat exchange space in the energy gathering ring 1, maintain a high flue gas velocity, and thus improve the flue gas heat exchange efficiency.

[0090] Specifically in one embodiment, the height of the bracket 105 is 3.5 mm.

[0091] Specifically in one embodiment, the height of the bracket 105 is 4.5 mm.

[0092] Specifically in one embodiment, the height of the bracket 105 is 5 mm.

[0093]

[0094]

[0095] Table 1

[0096] The energy gathering ring of the related art and the energy gathering ring of the present embodiment are simulated respectively, and the gas input power is controlled to remain unchanged. The comparison of the simulation results under the two working conditions is shown in Table 1. Compared with the energy gathering ring of the related art, the energy gathering ring of the present invention can improve the thermal efficiency of the gas stove from 75.571% to 82.332% when the fuel input and the fuel heat release are not much different. At the same time, it can significantly improve the heat transfer of the pot bottom and slightly reduce the heat transfer of the pot wall.

[0097] Combination Figure 4 It can be seen that the heat transfer cloud map of the pot bottom can be divided into three areas: the outermost low heat transfer area, the transition area between the outer low heat transfer area and the high heat transfer area, and the central annular high heat transfer area and its inner side. Since the diameter of the energy-gathering ring is 280mm, which is smaller than the diameter of the pot bottom, the smoke velocity at the bottom of the pot outside the energy-gathering ring is low, resulting in a low heat transfer area. Figure 2 and Figure 3 , there is a high temperature and high speed area of ​​smoke at the same position on the bottom of the pot, while the smoke speed and temperature are both low inside, thus forming an annular high heat transfer area and an inner low heat transfer area in the heat transfer cloud diagram. In the heat transfer cloud diagram, the area of ​​the outer low heat transfer area of ​​the bottom of the pot and the annular high heat transfer area is the largest, which is the most important area affecting the heat transfer of the bottom of the pot, and is also the area with the greatest difference between the two working conditions. Fig.11 By comparison, it can be found that the heat transfer at the bottom of the pot increases. Fig. 9 and Fig.10 It can be seen that the flue gas velocity increases at the location where the annular protrusion 104 is set, but the temperature difference is small, which indicates that the setting of the annular protrusion 104 in the present invention mainly plays the role of increasing the flue gas velocity and increasing the flue gas disturbance, thereby improving the heat transfer here.

[0098] According to an embodiment of the present invention, on the other hand, a gas stove is provided, comprising a burner head 2 and the energy gathering ring 1 provided in the above embodiment.

[0099] In this embodiment, the energy gathering ring 1 is provided with a closing plate 103, which protrudes downward from the main body 101. The closing plate 103 can close the gap between the lower side of the main body 101 and the panel to prevent smoke from flowing out from the gap between the lower side of the main body 101 and the panel, thereby reducing the amount of high-temperature smoke that escapes from the heat exchange area without exchanging heat with the cookware, thereby reducing heat loss, and enabling the fully premixed gas stove to achieve the expected thermal efficiency target.

[0100] In one embodiment, the distance between the energy focusing ring 1 and the furnace head 2 is L2, and L2 is less than 3 mm.

[0101] In this embodiment, the distance between the energy focusing ring 1 and the burner head 2 is less than 3 mm, which can control the size of the combustion and heat exchange space in the energy focusing ring 1, maintain a high flue gas velocity, and thus improve the flue gas heat exchange efficiency.

[0102] In one embodiment, the gas stove further comprises a panel, and the energy gathering ring 1 is placed on the panel.

[0103] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present application.

Claims

1. An energy-gathering ring, characterized in that: include: The main body (101) is annular; A closing plate (103), the closing plate (103) protrudes downward from the main body (101), and the closing plate (103) is suitable for closing the gap between the lower side of the main body (101) and the gas stove panel.

2. The energy-gathering ring according to claim 1, characterized in that: The energy gathering ring is suitable for surrounding the outer side of the burner head, and the inner periphery of the closing plate (103) is suitable for being close to the burner head (2).

3. The energy-gathering ring according to claim 1, characterized in that: The energy gathering ring further comprises a support foot (102), wherein the support foot (102) is connected to the bottom surface of the main body (101), and the support foot (102) is suitable for being placed in a positioning groove of a gas stove panel.

4. The energy-gathering ring according to claim 3, characterized in that: The outer periphery of the closing plate (103) is connected to the supporting foot (102).

5. The energy-gathering ring according to any one of claims 1 to 4, characterized in that: A spoiler structure is provided on the upper surface of the main body (101) near the edge.

6. The energy-gathering ring according to claim 5, characterized in that: The spoiler structure comprises at least one annular protrusion (104).

7. The energy-gathering ring according to claim 6, characterized in that: The height of the annular protrusion (104) is H1, 1mm≤H1≤1.5mm.

8. The energy-gathering ring according to claim 7, characterized in that: The distance between two adjacent annular protrusions (104) is L1, and L1≥2H1.

9. The energy-gathering ring according to any one of claims 6 to 8, characterized in that: The spoiler structure comprises a plurality of annular protrusions (104), and the plurality of annular protrusions (104) are evenly distributed.

10. The energy-gathering ring according to any one of claims 6 to 8, characterized in that: The main body (101) comprises an annular top surface (1013), the annular top surface (1013) is arranged horizontally, and the spoiler structure is arranged on the annular top surface (1013).

11. The energy-gathering ring according to any one of claims 1 to 4 and 6 to 8, characterized in that: The energy-gathering ring (1) further comprises a bracket (105) arranged on the main body (101), and the height of the bracket (105) is H2, 3.5 mm≤H2≤5 mm.

12. A gas stove, characterized in that: include: Burner (2); The energy focusing ring (1) according to any one of claims 1 to 11.

13. The gas stove according to claim 12, characterized in that: The distance between the energy gathering ring (1) and the furnace head (2) is L2, and L2 is less than 3 mm.

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