Energy gathering ring and gas stove

Abstract

The utility model 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 which is annular; 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, so that 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 utility model relates to gas -cooker technical field, concretely relates to energy -gathering ring and gas -cooker. BACKGROUND

[0002] The combustion principle of the full premix gas stove is that the fuel mixes with air in the injection pipe, and the mixed gas is ignited to release heat after being sprayed out of the fire hole. The full premix gas stove of the related art has the problem that the energy-gathering ring does not gather energy enough, and part of the heat generated by the fuel combustion is lost, resulting in that the heat efficiency cannot be fully utilized, thus resulting in low heat efficiency. SUMMARY

[0003] Therefore, the utility model provides an energy-gathering ring and a gas stove to solve the problem of low heat efficiency of the full premix gas stove.

[0004] In a first aspect, the utility model provides an energy-gathering ring, which comprises:

[0005] The main body part is annular.

[0006] The closing plate protrudes downward from the main body part, and is adapted to close the gap between the lower side of the main body part and the panel of the gas stove.

[0007] Advantages: By arranging the closing plate, the closing plate protrudes downward from the main body part, and after 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 part and the panel, so that the flue gas flowing out of the gap between the lower side of the main body part and the panel is avoided, the amount of high-temperature flue gas escaping from the heat exchange area without heat exchange is reduced, the heat loss is reduced, and the full premix gas stove reaches the expected heat efficiency target.

[0008] In an optional embodiment, the energy-gathering ring is adapted to surround the outside of the burner head, and the inner periphery of the closing plate is adapted to be close to the burner head.

[0009] Advantages: Since the inner periphery of the closing plate is close to the burner head, the size of the combustion and heat exchange space in the energy-gathering ring can be controlled, so that the flue gas heat exchange efficiency is improved.

[0010] In an optional embodiment, the energy-gathering ring further comprises a foot connected to the bottom surface of the main body part, and the foot is adapted to be placed in the positioning groove of the panel of the gas stove.

[0011] Advantages: By arranging the foot, the positioning groove of the panel of the gas stove can position the foot, so that the energy-gathering ring can be correctly placed on the panel of the gas stove.

[0012] In an optional embodiment, the outer periphery of the closing plate is connected with each foot.

[0013] Beneficial effects: since the closing plate is connected with each support leg, the closing plate and the support leg are connected as a whole, which is convenient for processing and can ensure the balance of the whole energy collecting ring.

[0014] In an alternative embodiment, a turbulence structure is arranged on the upper surface of the main body part near the edge.

[0015] Beneficial effects: by arranging the turbulence structure on the upper surface of the main body part near the edge, the local flue gas flow rate and turbulence intensity can be increased without changing the overall flue gas flow direction, thereby increasing the convective heat transfer coefficient at this position and further increasing the heat exchange amount at the edge position of the pot bottom, so as to improve the heat transfer uniformity of the pot bottom.

[0016] In an alternative embodiment, the turbulence structure comprises at least one annular protrusion.

[0017] Beneficial effects: the turbulence structure comprises at least one annular protrusion, which can enhance the disturbance to the flue gas when the high-temperature flue gas flows radially from the inside to the outside, thereby increasing the local flue gas flow rate and turbulence intensity without changing the overall flue gas flow direction, thereby increasing the convective heat transfer coefficient at this position and further increasing the heat exchange amount at the edge position of the pot bottom, so as to improve the heat transfer uniformity of the pot bottom.

[0018] In an alternative embodiment, the height of the annular protrusion is H1, and 1mm≤H1≤1.5mm.

[0019] Beneficial effects: 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, and if the height of the annular protrusion is higher than 1.5mm, it is easy to cause the flue gas speed to be too fast and change the flue gas flow direction, therefore the height of the annular protrusion is between 1mm and 1.5mm, which is convenient for processing and will not cause the flue gas speed to be too fast, thereby increasing the local flue gas flow rate and turbulence intensity without changing the overall flue gas flow direction, thereby increasing the convective heat transfer coefficient at this position and further increasing the heat exchange amount at the edge position of the pot bottom, so as to improve the heat transfer uniformity of the pot bottom.

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

[0021] Beneficial effects: if the distance between adjacent two annular protrusions is too small, the heat exchange space will be reduced, therefore the distance between adjacent two annular protrusions is greater than or equal to twice the height of the annular protrusion, which can make the annular protrusion increase the convective heat transfer coefficient and thereby increase the convective heat exchange amount, so as to improve the heat transfer uniformity of the pot bottom.

[0022] Beneficial effects: The disturbance structure includes a plurality of uniformly distributed annular protrusions, when the high-temperature flue gas flows along the radial direction from inside to outside, the annular protrusions can strengthen the disturbance to the flue gas, increase the local flue gas flow rate and the turbulence intensity without changing the overall flow direction of the flue gas, thereby increasing the convective heat transfer coefficient at this position and further improving the heat exchange capacity at the edge position of the pot bottom, so as to improve the heat transfer uniformity of the pot bottom.

[0023] In an alternative embodiment, the main body part comprises a ring-shaped top surface, the ring-shaped top surface is horizontally arranged, and the disturbance structure is arranged on the ring-shaped top surface.

[0024] Beneficial effects: The main body part comprises a ring-shaped top surface, the space between the ring-shaped top surface and the pot bottom is small, which can increase the flue gas speed at the edge position of the pot bottom, thereby improving the heat exchange capacity at the edge position of the pot bottom, and the disturbance structure is arranged on the ring-shaped top surface, which can strengthen the disturbance to the flue gas, increase the local flue gas flow rate and the turbulence intensity without changing the overall flow direction of the flue gas, thereby increasing the convective heat transfer coefficient at this position and further improving the heat exchange capacity at the edge position of the pot bottom, so as to improve the heat transfer uniformity of the pot bottom.

[0025] In an alternative embodiment, the energy-gathering ring further comprises a support arranged on the main body part, the height of the support is H2, and 3.5mm≤H2≤5mm.

[0026] Beneficial effects: The height of the support is between 3.5mm and 5mm, which can control the size of the combustion and heat exchange space in the energy-gathering ring, maintain a high flue gas speed, and thereby improve the flue gas heat exchange efficiency.

[0027] In a second aspect, the utility model also provides a gas stove, which comprises:

[0028] A burner;

[0029] The energy-gathering ring.

[0030] Beneficial effects: The energy-gathering ring is provided with a closing plate, the closing plate protrudes downward from the main body part, the closing plate can close the gap between the lower side of the main body part and the panel, avoid the flue gas flowing out from the gap between the lower side of the main body part and the panel, thereby reducing the amount of high-temperature flue gas that escapes from the heat exchange area without being heat exchanged with the pot, reducing heat loss, and further making the full-premixing gas stove achieve the expected thermal efficiency target.

[0031] In an alternative embodiment, the distance between the energy-gathering ring and the burner is L2, and L2<3mm.

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

[0033] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0034] Figure 1 The cross-sectional temperature distribution cloud chart of the full premix gas stove using the related art energy gathering ring;

[0035] Figure 2 The pan bottom temperature distribution cloud chart of the full premix gas stove using the related art energy gathering ring;

[0036] Figure 3 The pan bottom speed distribution cloud chart of the full premix gas stove using the related art energy gathering ring;

[0037] Figure 4 The pan bottom heat transfer amount distribution cloud chart of the full premix gas stove using the related art energy gathering ring;

[0038] Figure 5 The structure schematic diagram of the energy gathering ring of the embodiment of the present application;

[0039] Figure 6 The front view of the energy gathering ring of the embodiment of the present application;

[0040] Figure 7 The top view of the energy gathering ring of the embodiment of the present application;

[0041] Figure 8 The perspective view of the gas stove of the embodiment of the present application;

[0042] Figure 9 The pan bottom temperature distribution cloud chart when the related art energy gathering ring and the energy gathering ring of the embodiment of the present application are respectively used under the same working condition;

[0043] Figure 10 The pan bottom speed distribution cloud chart when the related art energy gathering ring and the energy gathering ring of the embodiment of the present application are respectively used under the same working condition;

[0044] Figure 11 The comparison chart of the pan bottom heat transfer amount cloud chart when the related art energy gathering ring and the energy gathering ring of the embodiment of the present application are respectively used under the same working condition.

[0045] BRIEF DESCRIPTION OF DRAWINGS:

[0046] 1, focusing ring; 101, main body; 1011, peripheral wall; 1012, annular bottom wall; 1013, annular top surface; 1014, inner wall; 102, leg; 103, closure plate; 104, annular protrusion; 105, bracket; 2, burner. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0050] The combustion principle of the full premix gas stove is that the fuel is mixed with air in the injection pipe, and the mixed gas is ignited to release heat after being sprayed out of the fire hole. The combustion principle of the atmospheric gas stove is that the fuel is injected into the injection pipe at high speed and mixed with the primary air injected through the secondary air inlet, and the mixed gas is ignited to partially burn, and the combustion products are mixed with the secondary air to achieve complete combustion. In the related art, the same energy collection ring is often used for the full premix gas stove and the atmospheric gas stove. For the full premix gas stove, since the same energy collection ring as the atmospheric gas stove is used, and the secondary air does not need to enter, the gap between the energy collection ring and the panel will cause unnecessary heat loss, resulting in that the full premix gas stove cannot reach the expected thermal efficiency target.

[0051] Further, by means of numerical simulation, the gas mixing, combustion heat release and flue gas flow process in the working process of the full premix gas stove are simulated, and it is found that part of the high-temperature flue gas is sprayed out of the lower gap of the energy collection ring. Figure 1 , Figure 1 The position indicated by the arrow in the middle represents that part of the flue gas is sprayed out of the lower gap of the energy collection ring, resulting in that this part of the high-temperature flue gas does not participate in the heat exchange process with the bottom of the pot, causing heat loss.

[0052] In addition, high-temperature flue gas is generated after the fuel is burned, and the high-temperature flue gas exchanges heat with the central part of the pot bottom, resulting in a decrease in temperature. As the moving space of the high-temperature flue gas in the radial direction gradually increases and the flue gas speed gradually decreases, the lower flue gas temperature and flue gas speed at the edge of the pot bottom jointly cause the heat transfer amount in this area to decrease. In combination with Figure 2 、 Figure 3 and Figure 4 , Figure 2 is a temperature distribution cloud map of the pot bottom of the full premix gas stove in the related art, Figure 3 is a speed distribution cloud map of the pot bottom of the full premix gas stove in the related art, Figure 4 is a heat transfer amount distribution cloud map of the pot bottom of the full premix gas stove in the related art. When analyzing the temperature cloud map, the speed cloud map and the heat transfer cloud map of the pot bottom, it is found that the temperature, the speed and the heat transfer amount in the central area of the pot bottom are all higher, and the temperature, the speed and the heat transfer amount at the edge of the pot bottom are lower. It is calculated that the heat transfer amount of the pot bottom is the most important factor affecting the thermal efficiency of the gas stove, and the convection heat transfer amount is the most important factor affecting the heat transfer amount of the pot bottom. It can be known from the convection heat transfer calculation formula Q = h * A * Δt that in the case of a certain heat exchange area of the pot bottom, the convection heat transfer coefficient or the flue gas temperature needs to be improved to increase the convection heat transfer amount. The factors affecting the size of the convection heat transfer coefficient mainly include fluid properties, fluid flow state, flow speed, environmental pressure and temperature, etc. Under the normal working condition of the household gas stove, the means for effectively improving the convection heat transfer coefficient is to enhance the flue gas flow speed.

[0053] In the following, Figures 1 to 11The embodiment of the utility model discloses.

[0054] According to the embodiment of the utility model, on the one hand, a kind of energy-gathering ring 1 is provided, including main part 101 and closure plate 103.

[0055] Wherein, main part 101 is annular;Closure plate 103 is protruding downward on main part 101, and closure plate 103 is suitable for closing the gap between the lower side of main part 101 and gas stove panel.

[0056] In this embodiment, by setting closure plate 103, closure plate 103 is protruding downward on main part 101, after the energy-gathering ring 1 is placed on the panel of gas stove, closure plate 103 can close the gap between the lower side of main part 101 and panel, avoid the flue gas from the gap between the lower side of main part 101 and panel, thereby reduce the high-temperature flue gas amount that escapes from heat exchange area without heat exchange with utensil, to reduce heat loss, further make full premix gas stove reach the expected thermal efficiency target.

[0057] Combining Figure 1 , the working process of full premix gas stove of related art is simulated, and it is found that part of high-temperature flue gas is sprayed from the gap below the energy-gathering ring, which causes the heat loss caused by the heat exchange process of this part of high-temperature flue gas not participating in the bottom of the pot. Figure 1 The whiter the color in the simulation diagram is, the higher the temperature is, from Figure 1 It can be seen from the simulation diagram that the color is white in the gap below the energy-gathering ring on the right side of the burner, so it can be concluded that high-temperature flue gas is sprayed from there, which will cause heat loss. In this embodiment, closure plate 103 is provided, closure plate 103 is connected with each supporting leg 102, closure plate 103 is protruding downward on main part 101, and closure plate 103 can close the gap between the lower side of energy-gathering ring 1 and panel, avoid the flue gas from the gap between the lower side of energy-gathering ring 1 and panel, thereby reduce the high-temperature flue gas amount that escapes from heat exchange area without heat exchange with utensil, to reduce heat loss, further make full premix gas stove reach the expected thermal efficiency target.

[0058] It should be noted that the energy-gathering ring 1 is used for full premix gas stove, fuel is mixed with air in the injector pipe, and the mixed gas is ignited to release heat after being sprayed out of the fire hole, without the need for secondary air supply, so that closure plate 103 closes the gap between main part 101 and panel, ensures that energy-gathering ring 1 can be closely connected with the panel of gas stove, and there is no other flue gas outlet except the gap between energy-gathering ring 1 and the bottom of the pot after the utensil is placed on the gas stove, thereby reducing the high-temperature flue gas amount that escapes from heat exchange area without heat exchange with utensil, to reduce heat loss.

[0059] Specifically as Figure 6 shown, Figure 6The front view of the energy-concentrating ring 1 shows that the bottom of the energy-concentrating ring 1 is thickened by the sealing plate 103 to prevent flue gas from flowing out through the gap at the bottom of the energy-concentrating ring 1.

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

[0061] In one specific 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 a closing plate 103 is connected to the bottom surface of the annular bottom wall 1012.

[0062] In one specific embodiment, the energy-concentrating ring 1 is an upwardly convex energy-concentrating ring. As the flue gas moves radially, the energy-concentrating ring 1 gradually bulges to reduce the flue gas flow space and increase the flue gas velocity at the edge of the pot bottom, thereby increasing the heat exchange at the edge of the pot bottom.

[0063] Specifically, such as Figure 6 As shown, the inner wall 1014 of the main body 101 has an arc-shaped cross section, and the arc is convex upward. The tangent slope of the inner wall 1014 of the main body 101 gradually decreases from the inside to the outside in the radial direction. This can reduce the flue gas flow space to increase the flue gas 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-concentrating ring 1 is adapted to surround the outside of the burner head, and the inner periphery of the sealing plate 103 is adapted to be close to the burner head 2.

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

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

[0067] In this embodiment, by providing the support leg 102, the positioning groove of the gas stove panel can position the support leg 102, making it easy to correctly place the energy-concentrating ring 1 on the gas stove panel.

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

[0069] In one specific embodiment, a total of four legs 102 are provided, and the four legs 102 are evenly distributed along the circumference.

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

[0071] In this embodiment, the closing plate 103 is connected to each of the legs 102, and the closing plate 103 is connected to the legs 102 integrally, which facilitates processing and ensures the balance of the entire energy collection ring 1.

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

[0073] In this embodiment, by providing the spoiler structure on the upper surface of the main body 101 near the edge, the local flue gas flow rate and turbulence intensity can be increased without changing the overall flue gas flow direction, thereby increasing the convective heat transfer coefficient at this location and further improving the heat exchange capacity at the edge of the pot bottom, achieving the purpose of improving the heat transfer uniformity of 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, which can enhance the disturbance to the flue gas when the high-temperature flue gas flows radially from the inside to the outside, thereby increasing the local flue gas flow rate and turbulence intensity without changing the overall flue gas flow direction, thereby increasing the convective heat transfer coefficient at this location and further improving the heat exchange capacity at the edge of the pot bottom, achieving the purpose of improving the heat transfer uniformity of the pot bottom.

[0076] The temperature of the flue gas decreases after heat exchange with the pot bottom during the flow process, and the lower flue gas temperature at the edge of the energy collection ring 1 results in lower heat exchange capacity. The annular protrusion 104 provided near the edge of the energy collection ring 1 in this embodiment increases the convective heat transfer coefficient and thus increases the convective heat exchange capacity, achieving the purpose of improving the heat transfer uniformity of the pot bottom.

[0077] In a specific embodiment, the annular protrusion 104 is provided with multiple.

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

[0079] In this embodiment, if the height of the annular protrusion 104 is less than 1mm, the annular protrusion 104 is not easy to process and the effect is not obvious, and if the height of the annular protrusion 104 is higher than 1.5mm, it is easy to cause the flue gas speed to be too fast and change the flue gas flow direction. Therefore, the height of the annular protrusion 104 is between 1mm and 1.5mm, which facilitates processing and does not cause the flue gas speed to be too fast, thereby increasing the local flue gas flow rate and turbulence intensity without changing the overall flue gas flow direction, thereby increasing the convective heat transfer coefficient at this location and further improving the heat exchange capacity at the edge of the pot bottom, achieving the purpose of improving the heat transfer uniformity of the pot bottom.

[0080] In a specific embodiment, the height of the annular protrusion 104 is 1.3mm.

[0081] In an 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, which can increase the convective heat transfer coefficient and increase the convective heat transfer, thereby improving the heat transfer uniformity of the pot bottom.

[0083] In an embodiment, the flow disturbance structure includes a plurality of annular protrusions 104, and the plurality of annular protrusions 104 are uniformly distributed.

[0084] In this embodiment, the flow disturbance structure includes a plurality of annular protrusions 104 uniformly distributed. When the high-temperature flue gas flows radially from the inside to the outside, the flue gas temperature near the edge is lower, which will result in lower heat exchange. 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 at this location and improving the heat exchange at the edge of the pot bottom, achieving the purpose of improving the heat transfer uniformity of the pot bottom.

[0085] In a specific embodiment, the annular protrusions 104 are uniformly distributed from the edge of the energy concentration ring 1.

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

[0087] In this embodiment, the main body 101 includes an annular top surface 1013, and the space between the annular top surface 1013 and the pot bottom is small, which can increase the flue gas speed at the edge of the pot bottom, thereby improving the heat exchange at the edge of the pot bottom. By arranging the flow disturbance structure on the annular top surface 1013, the disturbance of the flue gas can be enhanced, the local flue gas flow rate and turbulence intensity can be increased without changing the overall flow direction of the flue gas, thereby increasing the convective heat transfer coefficient at this location and improving the heat exchange at the edge of the pot bottom, achieving the purpose of improving the heat transfer uniformity of the pot bottom.

[0088] The energy concentration ring 1 further includes a support 105 arranged on the main body 101, and the height of the support 105 is H2, and 3.5mm≤H2≤5mm.

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

[0090] In a specific embodiment, the height of the support 105 is 3.5mm.

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

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

[0093]

[0094]

[0095] Table 1

[0096] The simulation of the relevant art's energy focusing ring and the energy focusing ring of the present embodiment is respectively carried out, the input power of the gas is controlled to be unchanged, and the simulation results under two working conditions are compared as shown in Table 1. The heat efficiency of the gas stove of the present embodiment is increased from 75.571% to 82.332% under the condition that the fuel input and the fuel heat release amount are not greatly different compared with the relevant art's energy focusing ring, and the heat transfer amount of the pot bottom can be significantly increased while the heat transfer amount of the pot wall is slightly reduced.

[0097] Combining Figure 4 It can be seen that the heat transfer amount cloud diagram of the pot bottom can be mainly divided into three regions: the outermost low heat transfer region, the transition region between the outer low heat transfer region and the high heat transfer region, and the central annular high heat transfer region and the inner side thereof. Since the diameter of the energy focusing ring is 280mm, which is smaller than the diameter of the pot bottom, the flue gas speed is low at the position of the pot bottom outside the energy focusing ring, thus causing this place to be a low heat transfer amount region. Combining Figure 2 and Figure 3 There is a high-temperature and high-speed region of flue gas at the same position of the pot bottom, and the inner side thereof has low flue gas speed and temperature, thus forming the annular high heat transfer amount region and the inner low heat transfer amount region in the heat transfer amount cloud diagram. The area of the region between the outer low heat transfer region and the annular high heat transfer region of the heat transfer amount cloud diagram is the largest, which is the most important region affecting the heat transfer amount of the pot bottom, and is also the region with the largest difference under the two working conditions. As Figure 11 can be found by comparison that the heat transfer amount at the position of the pot bottom is increased, combining Figure 9 and Figure 10 It can be seen that the flue gas speed is increased at the position of the annular protrusion 104, but the temperature difference is small, which shows that the annular protrusion 104 in the present embodiment mainly plays a role in increasing the flue gas speed and the disturbance of flue gas at this position, so as to increase the heat transfer amount at this position.

[0098] According to the embodiment of the present application, on the other hand, a gas stove is also provided, which comprises a burner 2 and the energy focusing ring 1 provided in the above embodiments.

[0099] In the embodiment, the energy-gathering ring 1 can close the gap between the lower side of the main body 101 and the panel by setting a closing plate 103 which protrudes downward from the main body 101, so as to avoid the flue gas from flowing out of the gap between the lower side of the main body 101 and the panel, thereby reducing the amount of high-temperature flue gas which escapes from the heat exchange area without being exchanged with the pot, reducing heat loss, and further making the full-premix gas stove achieve the expected thermal efficiency target.

[0100] In one embodiment, the distance between the energy-gathering ring 1 and the burner head 2 is L2, and L2<3mm.

[0101] In the embodiment, the distance between the energy-gathering ring 1 and the burner head 2 is less than 3mm, so as to control the size of the combustion and heat exchange space in the energy-gathering ring 1 and maintain a high flue gas speed, thereby improving 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 application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are also within the scope defined by the present application.

Claims

1. A shaped charge, characterized by, Comprising: a body part (101) in a ring shape; a closing plate (103) which projects downwardly from the body part (101), the closing plate (103) being adapted to close the gap between the lower side of the body part (101) and the gas stove panel.

2. The jet cone of claim 1, wherein, The energy-gathering ring is adapted to surround the outside of the burner head, and the inner periphery of the closing plate (103) is adapted to be close to the burner head (2).

3. The jet cone of claim 1, wherein, The energy-gathering ring further comprises a supporting leg (102) connected to the bottom surface of the body part (101), and the supporting leg (102) is adapted to be placed in the positioning groove of the gas stove panel.

4. The jet cone of claim 3, wherein, The outer periphery of the closing plate (103) is connected to the supporting leg (102).

5. The jet as claimed in any one of claims 1 to 4, characterized in that The upper surface of the body part (101) is provided with a turbulence structure near the edge.

6. The jet cone of claim 5, wherein, The turbulence structure comprises at least one annular protrusion (104).

7. The jet as claimed in claim 6, characterized in that The height of the annular protrusion (104) is H1, and 1mm≤H1≤1.5mm.

8. The jet as claimed in claim 7, characterized in that The distance between two adjacent annular protrusions (104) is L1, and L1≥2H1.

9. The jet as claimed in any one of claims 6 to 8, characterized in that The turbulence structure comprises a plurality of annular protrusions (104), and the plurality of annular protrusions (104) are uniformly distributed.

10. The jet as claimed in any one of claims 6 to 8, characterized in that The body part (101) comprises an annular top surface (1013) which is horizontally arranged, and the turbulence structure is arranged on the annular top surface (1013).

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

12. A gas hob, characterized in that Comprising: a burner head (2); the energy-gathering ring (1) according to any one of claims 1 to 11.

13. The gas hob according to claim 12, characterized in that The distance between the energy-gathering ring (1) and the burner head (2) is L2, and L2<3mm.

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