Stove body structure of cooking stove

Abstract

The invention relates to the technical field of commercial cookers, in particular to a cooker body structure of a cook.A hearth of a cooker body sequentially comprises a first high-temperature area, a second high-temperature area and a third high-temperature area from center to outside, a combustor is arranged at the center of the bottom of the first high-temperature area, and a first blocking structure is arranged between the first high-temperature area and the second high-temperature area; a communicating channel for communicating the high-temperature area I with the high-temperature area II is arranged on the first barrier structure; the smoke pipe channel is arranged in the stove body and is used for communicating the outside of the stove body with the high-temperature area II; the minimum included angle between the projection of the central axis of the communication channel and the projection of the central axis of the smoke pipe channel on the horizontal plane is larger than 88 degrees. The whole hearth is divided into the first high-temperature area, the second high-temperature area and the third high-temperature area in the furnace body, the relative position structure of the communicating channel and the smoke pipe channel is arranged, high temperature generated by flames sprayed out of the combustor is retained in the first high-temperature area and the second high-temperature area in sequence through the first blocking structure, and therefore the retention time of high-temperature gas is longer; and under the same energy consumption, more heat energy can be utilized, and high efficiency and energy conservation are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of commercial stoves, in particular to a stove body structure. Background Art

[0002] Currently, commercial gas stoves are commonly plagued by high energy consumption, significant cost pressures, and insufficient environmental compliance. Traditional commercial gas stoves typically have a thermal efficiency of less than 30% to 40%, resulting in significant energy waste. Amidst rising gas prices, fuel costs for the catering industry account for 15% to 20% of total operating expenses, placing significant pressure on operators. Meanwhile, the government is vigorously promoting its "dual carbon" goals, and some cities, such as Beijing, have begun restricting or phasing out inefficient stoves, exposing traditional gas stoves to policy risks. Furthermore, traditional stoves suffer from unstable firepower and long preheating times, impacting both food delivery efficiency and the customer experience.

[0003] High-efficiency, energy-saving stoves can effectively address these issues. By increasing thermal efficiency to over 50%, gas consumption can be significantly reduced by approximately 30%, and the cost of equipment upgrades can be recovered in one to two years. This not only reduces operational pressure on businesses but also complies with increasingly stringent environmental regulations, avoiding the risk of fines or equipment downtime due to substandard emissions. Furthermore, more stable firepower and faster heating rates can improve food delivery efficiency and enhance store competitiveness. In the long run, high-efficiency, energy-saving stoves can not only meet businesses' needs for cost reduction and efficiency improvement, but also support green and sustainable development, helping the catering industry achieve a win-win situation in terms of both economic benefits and social responsibility.

[0004] Some companies have attempted to address this issue by using heat-concentrating radiation layers. For example, the commercially available new infrared energy-saving large-cooker stove (Patent No. CN212339310U) employs a technical solution: the furnace has a slightly inclined surface, which is sequentially arranged from the inside out with an anti-rust layer, a refractory clay layer, and an infrared radiation layer. The outermost infrared radiation layer is aligned with the extension of the burner's upper surface. This allows the solar nuclear silicon crystal panels to heat up faster than conventional infrared ceramic panels and ensures complete combustion of the gas. However, this technical solution requires the addition of reflectors or radiators to achieve efficient energy conservation, increasing product cost and making its construction unaffordable in some economically disadvantaged environments.

[0005] Some companies have tried to use flue gas deflectors to solve the above-mentioned problem. For example, the flue gas deflector system of the existing commercial gas stove (patent number CN110986100A) adopts the following technical solution: a flue gas deflector connected to the burner is provided between the burner and the furnace. The flue gas deflector and the bottom surface of the furnace have a bowl-shaped structure with the same arc. Although the flue gas deflector guides the fire and smoke generated by the burner through the flue gas deflector, allowing the fire to burn closer to the bottom of the pot and improve thermal efficiency, the flame still flows throughout the entire furnace and is continuously dissipated by heat in the large space of the entire furnace. Summary of the Invention

[0006] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a stove body structure for a cooker, by dividing the entire furnace in the furnace body into high-temperature zone 1, high-temperature zone 2 and high-temperature zone 3, and by allowing the flame ejected from the burner to generate high temperature through a first barrier structure and first be retained in high-temperature zone 1, and then enter high-temperature zone 2 through a connecting channel. By setting the relative position structure of the connecting channel and the smoke exhaust port, the high-temperature gas can stay in high-temperature zone 2 longer, thereby transferring more heat to the frying pan placed on the stove body, utilizing heat energy more efficiently, and utilizing more heat energy under the same energy consumption, thereby achieving high efficiency and energy saving.

[0007] To achieve the above object, the present invention provides the following technical solutions: A stove body structure includes a stove body, a burner, and a smoke duct. The stove body includes, from the center outward, a first high-temperature zone, a second high-temperature zone, and a third high-temperature zone. The burner is disposed at the bottom center of the first high-temperature zone. A first barrier structure is disposed between the first high-temperature zone and the second high-temperature zone. The first barrier structure is provided with a communication channel for connecting the first high-temperature zone and the second high-temperature zone. The smoke duct is disposed in the stove body for connecting the exterior of the stove body with the second high-temperature zone. The minimum angle between the projection of the central axis of the communicating channel and the central axis of the smoke pipe channel on the horizontal plane is greater than 88°.

[0008] As a preferred embodiment of the technical solution of the present invention, the angle between the projection of the central axis of the communicating channel and the central axis of the smoke pipe channel on the horizontal plane is 180°.

[0009] As a preferred embodiment of the technical solution of the present invention, the connecting channel has at least two through holes, and the angle between the midpoint of the connecting line of the two farthest through holes on the outside of the first barrier structure and the projection of the connecting line of the center of the high-temperature zone and the central axis of the smoke pipe channel on the horizontal plane is 180°.

[0010] As a preferred embodiment of the technical solution of the present invention, a second barrier structure is further provided in the inner cavity of the stove body. The second barrier structure is higher than the first barrier structure, and the second barrier structure includes an inclined reflective surface.

[0011] As a preferred embodiment of the technical solution of the present invention, the stove body includes an arc-shaped concave surface, the second barrier structure is higher than the lowest point of the arc-shaped concave surface, the second barrier structure and the arc-shaped concave surface form an insulation space, and the insulation space is filled with refractory insulation mud.

[0012] As a preferred embodiment of the technical solution of the present invention, a plurality of first barrier structures are included, and the angle between the projections of the central axes of the connecting channels on two adjacent first barrier structures on the horizontal plane is greater than 88°, and the minimum angle between the projections of the central axes of the connecting channels of the outermost circle of the first barrier structure and the central axis of the smoke pipe channel on the horizontal plane is greater than 88°.

[0013] As a preferred embodiment of the technical solution of the present invention, the projection angle of the extension line of the central axis of the connecting channel on two adjacent first barrier structures on the horizontal plane is 180°, and the angle between the projection of the central axis of the connecting channel of the outermost circle of the first barrier structure and the central axis of the smoke pipe channel on the horizontal plane is 180°.

[0014] As a preferred embodiment of the technical solution of the present invention, the second high-temperature zone further includes a barrier member, which is protruding from the bottom of the inner cavity of the stove body.

[0015] As a preferred embodiment of the technical solution of the present invention, the barrier member may also be a baffle or a grille protruding from the side wall of the first barrier structure or the side wall of the second barrier structure.

[0016] As a preferred embodiment of the technical solution of the present invention, the smoke duct channel is connected to the smoke duct, and the smoke duct is provided with an air supply port near the smoke duct channel. The air supply port is connected to the main air duct of the fan through the exhaust pipe, and the main air duct is connected to the burner.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. By dividing the entire furnace into high-temperature zone 1, high-temperature zone 2 and high-temperature zone 3 in the furnace body, the traditional commercial stove is changed in which only the pot body part connected to the flame ejected from the burner is directly heated as the main cooking area, and the remaining parts cannot produce effective heating effect due to direct contact with the flame. After the present application divides the entire furnace into high-temperature zone 1, high-temperature zone 2 and high-temperature zone 3, the high-temperature zone 2 can also heat the pot by heat conduction through the mixture of flame and high-temperature gas, thereby expanding the effective heating area of the pot body. During cooking, the ingredients are heated more evenly in the pot. Under the combustion conditions of the same intensity and temperature, due to the uniform heating, the maturity of each part of the ingredients is more consistent, and the produced dishes have a better taste.

[0018] 2. By dividing the entire furnace into high-temperature zone 1, high-temperature zone 2 and high-temperature zone 3 in the furnace body, the flame ejected from the burner generates high temperature and is first retained in the high-temperature zone 1 through the first barrier structure, and then enters the high-temperature zone 2 through the connecting channel. By setting the relative position structure of the connecting channel and the smoke pipe channel, the high-temperature gas stays in the high-temperature zone 2 for a longer time, and then transfers more heat to the frying pan placed on the stove body, and utilizes heat energy more efficiently. More heat energy can be utilized under the same energy consumption, which is highly efficient and energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings: Figure 1 It is a cross-sectional view from the side perspective of the present invention.

[0020] Figure 2 This is a cross-sectional view from the side of the stove body after removing the refractory insulation mud in the present invention.

[0021] Figure 3 This is a top cross-sectional view of Example 1 of the present invention.

[0022] Figure 4 This is a top cross-sectional view of Example 1 of the present invention.

[0023] Figure 5 This is a top cross-sectional view of Example 3 of the present invention.

[0024] Figure 6 This is a top cross-sectional view of Example 4 of the present invention.

[0025] Figure 7 This is a top cross-sectional view of Example 4 of the present invention.

[0026] In the picture: 1. Cooker body, 101. Arc-shaped concave surface, 2. Burner, 3. Smoke duct, 4. Fan, 5. First barrier structure, 501. Connecting channel, 6. Smoke duct, 7. Second barrier structure, 701. Inclined reflecting surface, 8. Refractory insulation mud, 9. Barrier, 10. Air supply port, 11. Exhaust pipe, 12. Main air duct, a. High-temperature zone 1, b. High-temperature zone 2, c. High-temperature zone 3, α, Angle. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0029] The energy efficiency standards for the three energy efficiency levels involved in this application are all derived from my country's current energy efficiency standard for commercial gas stoves, "Energy Efficiency Limits and Energy Efficiency Grades for Commercial Gas Cookers" (GB 30531-2014). Level 1 energy efficiency stipulates a thermal efficiency of ≥56%, level 2 energy efficiency stipulates a thermal efficiency of 52% or less and <56%, and level 3 energy efficiency stipulates a thermal efficiency of ≥46%.

[0030] Among them, level three energy efficiency is the national mandatory entry threshold, and products with a thermal efficiency below 46% are prohibited from sale. However, some areas in first-tier cities such as Beijing and Shanghai have required the catering industry to use level one energy efficiency equipment.

[0031] Example 1 Currently used commercial gas stoves are atmospheric stoves. Except for the area where the flame directly contacts the pot bottom, the rest of the flame burns air, heating the air and then heating the pot, a process known as convection heat transfer. With existing stove structures, the flame directly contacts the pot bottom, while the remaining area is naturally lost due to free convection within the furnace. However, if the pot is made of iron, which has poor heat conductivity, only the bottom of the pot, which is in direct contact with the flame, is used as the high-temperature heating zone, enabling efficient cooking. To improve efficiency, chefs can stir-fry more frequently to cook ingredients more evenly while maintaining the same flame temperature, shortening the cooking time. This requires expanding the high-temperature area of the pot. Furthermore, in traditional stoves, only the high-temperature area at the pot bottom is consumed by convection heat transfer within the furnace, requiring a higher-power burner, resulting in increased energy consumption.

[0032] Refer to the attached Figure 1 As shown, a stove structure includes a stove body 1, a burner 2, and a smoke duct 3. The stove is connected to an external smoke duct 6 and a fan 4. In this application, the perspective of a chef cooking is used as the reference system, with the area close to the chef being the front and the area far from the chef being the rear. The burner 2 is located at the center of the bottom of the stove body 1, the smoke duct 3 is connected to the rear of the stove body 1, and the fan 4 is connected to the burner 2 to provide sufficient air for combustion. In this application, the side walls of the stove body 1 are provided with ceramic fiber insulation material.

[0033] A first barrier structure 5 is provided outside the burner 2 in the inner cavity of the stove body 1 . The first barrier structure 5 is a raised structure connected end to end to the bottom of the inner cavity of the stove body 1 . The first barrier structure 5 includes at least one connecting channel 501 .

[0034] Refer to the attached Figure 3 , Attachment Figure 4 As shown, the entire furnace is divided into three temperature zones by the first barrier structure 5 and the side wall of the stove body 1. The entire furnace includes high-temperature zone 1 a, high-temperature zone 2 b and high-temperature zone 3 c from the center to the outside. The flame ejected from the burner 2 generates high temperature through the first barrier structure 5 and is first retained in high-temperature zone 1 a. The temperature of high-temperature zone 1 is about 1200°C, and then enters high-temperature zone 2 b through the connecting channel 501. By setting the relative position structure of the connecting channel 501 and the smoke pipe channel 3, the high-temperature gas stays in high-temperature zone 2 for a longer time, and then transfers more heat to the frying pan placed on the stove body, and utilizes heat energy more efficiently. More heat energy can be utilized under the same energy consumption, which is highly efficient and energy-saving. The burner 2 is arranged at the bottom center of the high-temperature zone a. The high-temperature zone a and the high-temperature zone b are separated by a first barrier structure 5. The first barrier structure 5 is provided with a connecting channel 501. The connecting channel 501 connects the high-temperature zone a and the high-temperature zone b. The smoke pipe channel 3 passes through the side wall of the stove body 1 and is connected to the high-temperature zone b.

[0035] The high-temperature zone a is the area where the flame is in direct contact with the bottom of the pot. The hot air in the high-temperature zone a and a small amount of flame flow to the high-temperature zone b through the connecting channel 501. Since the connecting channel 501 and the smoke duct channel 3 are located far apart, the path of the high-temperature air flowing from the connecting channel 501 to the smoke duct channel 3 is longer. In the high-temperature zone b, the high-temperature air has a longer movement distance and stays in the high-temperature zone b for a longer time. During the longer residence time, the high-temperature air transfers its own heat to the pot body, so that the pot body in contact with the high-temperature zone b receives more heat energy, thereby increasing the high-temperature burning food area of the pot body and being able to cook the food more quickly. At the same time, when cooking the same food, a smaller power burner 2 can be selected.

[0036] Considering the direction of smoke and high-temperature gas exhaust, the minimum angle α between the horizontal projection of the central axis of the connecting channel 501 and the central axis of the smoke duct 3 is greater than 88°. When the angle α is 90° or less, the high-temperature gas exiting the connecting channel 501 travels 75% less distance, failing to achieve the desired effect of this technical solution, which requires a longer residence time in the second high-temperature zone b. Due to production tolerances in industrial manufacturing, typically within ±5% in the boiler industry, the angle α, when equal to 90°, is 88° after factoring in the industrial tolerance.

[0037] At the same time, the connecting channel 501 in this embodiment is not limited to one, but can include multiple channels. It is not limited to hole-shaped channels, but can also be a rectangular channel or a channel realized by a grille. As long as the structure can realize the connecting function, it falls within the scope of protection of this application.

[0038] In this embodiment, it is preferred that the projections of the extension line of the central axis of the connecting channel 501 and the extension line of the central axis of the smoke duct channel 3 on the horizontal plane coincide with each other. At this time, the movement path of the high-temperature gas from the connecting channel 501 to the smoke duct channel 3 is the longest, and the heat utilization rate of the high-temperature gas is the highest.

[0039] An air supply port 10 is provided near the smoke duct channel 3. The air supply port 10 is connected to the main air duct 12 of the fan 4 through the exhaust pipe 11. The main air duct 12 is connected to the burner 2. Since the high-temperature gas still has high heat when it is directly discharged from the smoke duct channel 3 to the smoke duct channel 3, the high-temperature smoke duct channel 3 will cause damage to the wall where it is installed. At the same time, its own life will be shortened due to the high temperature. Therefore, the air supply port 10 is designed, and the fan 4 is connected to supply cold air to the smoke duct channel 3 from the air supply port 10, and heat exchange is performed on the high-temperature gas discharged into the smoke duct channel 3 to reduce the temperature. The temperature of the high-temperature gas reaching the air supply port 10 is 500°C. After being mixed with the excess normal-temperature air volume in the fan 4, the exhaust flow rate can be reduced to increase the thermal efficiency. The outlet temperature of the smoke duct channel 3 can be reduced to below 200°C, protecting the smoke duct channel 3 and the surrounding walls.

[0040] In this embodiment, the first barrier structure 5 is preferably made of refractory bricks or refractory mud due to cost considerations, but other materials that can achieve isolation and have high temperature resistance and poor self-heat absorption capacity also fall within the scope of protection of this application.

[0041] It should be noted that by selecting a suitable material for the first barrier structure 5 and selecting a suitable thickness of the first barrier structure 5, in actual use, the first barrier structure 5, while playing the role of isolating high-temperature gas, absorbs much less heat itself than the heat conducted to the pot due to extending the movement distance of the high-temperature gas and extending the heat exchange between the high-temperature gas and the pot body in the high-temperature zone b, thereby ensuring that the present application can definitely improve the heat utilization rate.

[0042] Example 2 Based on Example 1, the difference from Example 1 is that: Reference Figure 1 , Attachment Figure 2 As shown, a second barrier structure 7 is further provided in the inner cavity of the stove body 1. The second barrier structure 7 is higher than the first barrier structure 5, and the second barrier structure 7 includes an inclined reflecting surface 701. The inclined reflecting surface 701 increases the heat reflection of the high-temperature gas on the pot body in the high-temperature second zone b, thereby improving the thermal efficiency.

[0043] The stove body 1 includes a curved concave surface 101. The second barrier structure 7 is higher than the lowest point of the curved concave surface 101. The second barrier structure 7 and the curved concave surface 101 form a heat-insulating space. This heat-insulating space is formed by the height difference between the second barrier structure 7 and the curved concave surface 101 and is filled with refractory insulating mud 8. The refractory insulating mud 8 prevents heat from dissipating in the high-temperature zone C. When the pot body is covered, the hot air inside the high-temperature zone C creates a smoldering effect.

[0044] In this embodiment, the second barrier structure 7 is preferably made of refractory bricks or refractory mud due to cost considerations, but other materials that can achieve isolation and have high temperature resistance and poor self-heat absorption capacity also fall within the scope of protection of this application.

[0045] It should be noted that by selecting a suitable material for the second barrier structure 7 and selecting a suitable thickness of the second barrier structure 7, in actual use, the heat absorbed by the first barrier structure 5 and the second barrier structure 7 themselves is much lower than the heat conducted to the pot due to extending the movement distance of the high-temperature gas and extending the heat exchange between the high-temperature gas and the pot body in the high-temperature second zone b, thereby ensuring that the present application can improve the heat utilization rate.

[0046] Example 3 Based on Example 1, the difference from Example 1 and Example 2 is that: Reference Figure 5 As shown, the system includes multiple first barrier structures 5. The minimum angle α between the horizontal projections of the central axes of the connecting channels 501 of two adjacent first barrier structures 5 is 88°. Furthermore, the minimum angle α between the horizontal projections of the central axes of the connecting channels 501 of the outermost first barrier structure 5 and the central axis of the flue channel 3 is greater than 88°. When the angle α is less than or equal to 90°, the high-temperature gas flowing out of the connecting channels 501 travels 75% less distance, failing to achieve the desired longer residence time in the second high-temperature zone b required by this technical solution. However, due to production tolerances in industrial manufacturing, typically within ±5% in the boiler industry, the angle α equal to 90°, after factoring in the industrial tolerance, is 88°.

[0047] The projections of the extension lines of the central axes of the connecting channels 501 on two adjacent first barrier structures 5 on the horizontal plane coincide with each other, and the projections of the extension lines of the central axes of the connecting channels 501 of the outermost first barrier structure 5 and the smoke pipe channel 3 on the horizontal plane coincide with each other.

[0048] Example 4 Based on Example 1, the difference from Example 1, Example 2, and Example 3 is that: Reference Figure 6 , Attachment Figure 7 As shown, the high temperature zone b also includes a barrier 9, which is provided at the bottom of the inner cavity of the stove body 1, and is used to further allow the mixture of high temperature gas and flame to stay in the high temperature zone b for a longer time. Figure 3 As shown, the barrier members 9 are arranged in a uniform circumferential array in the high temperature zone b. The arrows in the figure are the movement direction of the high temperature air, which flows out from the connecting channel 501, moves to the smoke pipe channel 3, and finally converges at the smoke pipe channel 3 and is discharged. Figure 6 As shown in the uniform array arrangement, the high-temperature gas flowing out of the high-temperature zone a is 1200°C when flowing out of the connecting channel 501 and is classified to the left and right sides, gradually cooling from 1200°C to about 600°C at the exhaust port 6.

[0049] The blocking member 9 is protruding from the bottom of the inner cavity of the stove body 1 .

[0050] Furthermore, the distance between the barriers 9 can be optimized, becoming shorter the closer they are to the high-temperature gas discharge end. Furthermore, since the high-temperature air simultaneously transfers heat to the pot body as it moves through the second high-temperature zone b, the thermal energy gradually decreases throughout the process. By placing the barriers 9 more densely at the end of the path, the high-temperature gas can gradually decrease in speed as it travels along the entire path, thereby preventing excessive obstruction at the front end of the path from causing excessive cooling at the back end. This, in turn, prevents a large temperature difference between the pot body and the contact area between the second high-temperature zone b throughout the process.

[0051] Among them, the blocking member 9 here can be a blocking plate, a spindle-shaped cross-section with pointed ends, a cylinder, or a blocking piece. In this application, the cylinder with the best effect is selected.

[0052] The barrier member 9 may also be a baffle or a grille protruding from the side wall of the first barrier structure 5 or the side wall of the second barrier structure 7 .

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A stove body structure, comprising a stove body (1), a burner (2) and a smoke pipe channel (3), characterized in that: The furnace of the stove body (1) includes a high-temperature zone (a), a high-temperature zone (b), and a high-temperature zone (c) in order from the center outward. The burner (2) is arranged at the bottom center of the high-temperature zone (a). A first barrier structure (5) is provided between the high-temperature zone (a) and the high-temperature zone (b). A connecting channel (501) for connecting the high-temperature zone (a) and the high-temperature zone (b) is provided on the first barrier structure (5). The smoke pipe channel (3) is provided in the stove body (1) for connecting the outside of the stove body (1) with the high-temperature zone (b). The minimum angle between the projection of the central axis of the communicating channel (501) and the central axis of the smoke tube channel (3) on the horizontal plane is greater than 88°.

2. The stove body structure according to claim 1, characterized in that: The angle between the projection of the central axis of the communicating channel (501) and the central axis of the smoke pipe channel (3) on the horizontal plane is 180°.

3. The stove body structure according to claim 2, characterized in that: The connecting channel (501) has at least two through holes (5011), and the angle between the midpoint of the connecting line of the two most distant through holes (5011) on the outside of the first barrier structure (5), the connecting line of the center of the high-temperature zone (a), and the projection of the central axis of the smoke pipe channel (3) on the horizontal plane is 180°.

4. The stove body structure according to claim 3, characterized in that: A second barrier structure (7) is further provided in the inner cavity of the stove body (1); the second barrier structure (7) is higher than the first barrier structure (5), and the second barrier structure (7) includes an inclined reflective surface (701).

5. The stove body structure according to claim 4, characterized in that: The stove body (1) includes an arc-shaped concave surface (101), the second barrier structure (7) is higher than the lowest point of the arc-shaped concave surface (101), and the second barrier structure (7) and the arc-shaped concave surface (101) form a heat-insulating space, which is filled with refractory heat-insulating mud (8).

6. A stove body structure according to claim 2 or 5, characterized in that: The invention comprises a plurality of first barrier structures (5), wherein the angle between the projections of the central axes of the connecting channels (501) on two adjacent first barrier structures (5) on a horizontal plane is greater than 90°, and the minimum angle between the projections of the central axis of the connecting channel (501) of the outermost first barrier structure (5) and the central axis of the smoke pipe channel (3) on a horizontal plane is greater than 88°.

7. The stove body structure according to claim 6, characterized in that: The included angle of the projection of the extension line of the central axis of the connecting channel (501) on two adjacent first barrier structures (5) on the horizontal plane is 180°, and the included angle between the projection of the central axis of the connecting channel (501) of the outermost first barrier structure (5) and the central axis of the smoke pipe channel (3) on the horizontal plane is 180°.

8. A stove body structure according to claim 3 or 7, characterized in that: The second high-temperature zone (b) further includes a barrier (9), and the barrier (9) is protruding from the bottom of the inner cavity of the stove body (1).

9. The stove body structure according to claim 8, characterized in that: The barrier member (9) may also be a baffle or a grille protruding from the side wall of the first barrier structure (5) or the side wall of the second barrier structure (7).

10. The stove body structure according to claim 1, characterized in that: The smoke duct channel (3) is connected to the smoke duct (6), and the smoke duct (6) is provided with an air supply port (10) near the smoke duct channel (3). The air supply port (10) is connected to the main air duct (12) of the fan (4) through the exhaust pipe (11), and the main air duct (12) is connected to the burner (2).

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