Combustion device

Abstract

The utility model relates to a combustion device capable of generating a spiral interlaced flame effect and improving combustion firepower, which comprises an outer layer wall and an inner layer wall, a ventilation cavity is formed between the inner layer wall and the outer layer wall, a plurality of air inlet structures which are distributed at intervals in the circumferential direction are arranged at the upper end of the inner layer wall, and a plurality of air outlet structures are arranged at the lower end of the inner layer wall. A combustion chamber defined by the inner layer wall is communicated with the ventilation cavity through the air inlet structure, an air inlet is formed in the lower end of the inner layer wall, the air inlet structure comprises a first air inlet hole and a guider, the guider is provided with an air guiding face facing the first air inlet hole, and the air guiding face faces the first air inlet hole. The air guide face is formed by extending a connecting edge to the direction of the first air inlet hole and the interior of the combustion chamber to an outlet edge, a second air inlet hole is defined by the outlet edge, and the second air inlet hole is inclined upwards so that air flowing through the first air inlet hole can be guided towards the interior of the inner layer wall in an inclined upwards mode.

Description

Technical Field

[0001] The utility model relates to a combustion device, in particular to a combustion device capable of generating a spiral intertwined flame effect and improving the combustion firepower. Background Art

[0002] A combustion device is a device used to burn materials to generate flames for purposes such as heating, grilling, or cooking. In order to ensure complete combustion of the fuel during combustion and avoid the generation of excessive unburned substances (such as carbon monoxide and unburned particulate matter, etc.), sufficient oxygen needs to enter the combustion device. For this reason, various combustion devices that allow external gases to enter the interior have been designed in the prior art. These combustion devices can improve the combustion firepower under certain conditions, but the firepower still needs to be improved. Summary of the Utility Model

[0003] In view of this, it is necessary to provide a combustion device that can generate a spiral intertwined flame effect and improve the combustion firepower.

[0004] The utility model provides a combustion device, which comprises:

[0005] An outer wall;

[0006] An inner wall, the inner wall encloses a combustion chamber with a vertical virtual axis. An air chamber is formed between the inner wall and the outer wall, and external gas can enter the air chamber. A plurality of intake structures are circumferentially and spacedly distributed at the upper end of the inner wall. The combustion chamber communicates with the air chamber through the intake structures, and an air inlet is provided at the lower end of the inner wall;

[0007] Wherein, the intake structure comprises:

[0008] A first intake hole, the first intake hole is arranged on the inner wall;

[0009] A guide, the guide is arranged inside the inner wall. The guide has a wind guiding surface facing the first intake hole. The wind guiding surface has a connecting edge and an outlet edge. The connecting edge connects the inner wall and extends along the contour of the first intake hole. The wind guiding surface extends from the connecting edge towards the first intake hole and towards the interior of the combustion chamber to the outlet edge. The outlet edge defines a second intake hole, and the orientation of the second intake hole is inclined upwards relative to the vertical virtual axis to guide the gas flowing through the first intake hole towards the interior of the inner wall and obliquely upwards.

[0010] The combustion device provided by the present utility model generates hot air when the combustible burns in the combustion chamber on the inner layer wall. The hot air will flow towards the top opening of the combustion chamber, and the outside gas will enter the combustion chamber from the air inlet at the lower end of the inner layer wall, forming a first upward flowing air current. A little unburned matter is entrained in the first air current.

[0011] The outside gas entering the ventilation chamber will be respectively introduced into the combustion chamber through a plurality of air intake structures provided at the upper end of the inner layer wall. During the introduction process, after the air current passes through the first air intake hole, it will flow through the air guiding surface and flow obliquely upward into the combustion chamber from the second air intake hole under the guidance of the air guiding surface. When the air current passes through the air intake structure, due to the Laval effect, its flow rate will accelerate when it flows into the combustion chamber, and a plurality of air intake structures guide the formation of a plurality of second air currents. After the plurality of second air currents converge with the flame in the combustion chamber, the flame will be in a spiral intertwined shape, which can further burn the unburned matter entrained in the first air current. At the same time, the accelerated second air current will make the flame flow out of the top opening of the combustion chamber more quickly, thereby improving the firepower. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of the combustion device according to the specific embodiment of the present utility model.

[0013] Figure 2 is Figure 1 a sectional view.

[0014] Figure 3 It is a schematic structural diagram of the inner layer wall in the first perspective and an enlarged view of the air intake structure according to the specific embodiment of the present utility model.

[0015] Figure 4 It is a schematic structural diagram of the inner layer wall in the second perspective and an enlarged view of the air intake structure according to the specific embodiment of the present utility model.

[0016] Figure 5 For the fuel in Figure 1 a schematic diagram of the shape of the flame generated by the combustion of the combustion device when viewed from above.

[0017] Figure 6 For the fuel in Figure 1 a schematic diagram of the shape of the flame generated by the combustion of the combustion device when viewed from the side.

[0018] Figure 7 is Figure 1 a schematic structural diagram of the combustion device after installing a bracket. SPECIFIC EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. It can be understood that the accompanying drawings are only for reference and illustration, and are not used to limit the present utility model. The connection relationships shown in the drawings are only for clear description and do not limit the connection methods.

[0020] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intermediate component at the same time. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. It should also 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, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0021] It should also be noted that in the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] Please refer to Figure 1 and Figure 2 As shown, the specific embodiment of the present utility model provides a combustion device 100, and the combustion device 100 includes an outer wall 20 and an inner wall 10.

[0023] The upper end of the outer wall 20 is connected to a ring plate 21, and the middle of the ring plate 21 has a placement opening 22.

[0024] The upper edge of the inner wall 10 is bent outward to form a flange 15. The lower end of the inner wall 10 can be placed into the interior of the outer wall 20 from the placement opening 22, and the flange 15 is supported by the top surface of the ring plate 21, so that the inner wall 10 is suspended inside the outer wall 20.

[0025] After the inner wall 10 is placed into the interior of the outer wall 20, the inner wall 10 closes the placement opening 22, and a closed cavity 23 is formed inside the outer wall 20. There is a ventilation chamber 231 between the outer wall 20 and the inner wall 10. The upper end of the ventilation chamber 231 is closed by the ring plate 21. The ventilation chamber 231 is preferably an annular chamber, and the annular chamber is a part of the cavity 23.

[0026] The outer wall 20 is provided with a ventilation opening 24. The ventilation opening 24 can be arranged on the circumferential direction of the side wall of the outer wall 20. An adjustment plate 30 is installed on the outer wall 20. The adjustment plate 30 is connected to a handle 31. By turning the handle 31, the adjustment plate 30 can rotate relative to the outer wall 20. Rotating the adjustment plate 30 can open or close the ventilation opening 24, and can adjust the ventilation area size of the ventilation opening 24, so as to connect the closed cavity 23 to the outside and change the amount of external gas entering the cavity 23. External gas can enter the ventilation chamber 231 from the ventilation opening 24 and flow upward in the ventilation chamber 231.

[0027] The inner wall 10 encloses a combustion chamber 110 with a vertical virtual axis X. Fuel burns in the combustion chamber 110. The upper opening 101 of the inner wall 10 is used for the combustion flame to eject. A tray 33 is arranged in the inner wall 10. The tray 33 carries fuel, and the tray 33 has ventilation holes. The lower end of the inner wall 10 is provided with an air inlet 102. The air inlet 102 can be arranged on the side surface of the inner wall 10, or the lower end opening of the inner wall 10 can be used as the air inlet 102 as shown in Figure 2 shown.

[0028] When the fuel burns, external gas enters the cavity 23 from the ventilation opening 24, and then enters the combustion chamber 110 from the air inlet 102 to contact the fuel. The hot air generated by the fuel combustion will flow upward to form a first upward flowing air current G1. A little unburned matter that is not fully burned is entrained in the first air current G1.

[0029] Combined Figures 2 - 4 shown, a plurality of air inlet structures 40 are circumferentially and spacedly arranged at the upper end of the inner wall 10. The combustion chamber 110 communicates with the ventilation chamber 231 through the air inlet structures 40. External gas enters the combustion chamber 110 from the ventilation chamber 231 under the guidance of the air inlet structures 40. The number of the air inlet structures 40 is preferably 10 - 30, and more preferably 20.

[0030] Specifically, the intake structure 40 includes a first intake hole 41 and a deflector 42. The first intake hole 41 is formed on the inner layer wall 10, and the deflector 42 is disposed inside the inner layer wall 10. The contour of the first intake hole 41 can be circular, oval, or polygonal, without limitation here. In this specific embodiment, the contour of the first intake hole 41 is circular.

[0031] The deflector 42 has a wind guiding surface 421 facing the first intake hole 41. The wind guiding surface 421 has a connecting edge 4211 and an outlet edge 4212. The connecting edge 4211 is connected to the inner layer wall 10 and extends along the contour of the first intake hole 41, completely surrounding the first intake hole 41 or surrounding a part of the first intake hole 41. The connecting edge 4211 can coincide with the contour of the first intake hole 41, being circular, oval, or polygonal. The connecting edge 4211 can also be outside the contour of the first intake hole 41 and at a certain distance therefrom.

[0032] The connecting edge 4211 extends naturally towards the first intake hole 41 and towards the inside of the combustion chamber 110 to the outlet edge 4212, thereby obtaining the wind guiding surface 421. The outlet edge 4212 defines a second intake hole 4213. The orientation Y of the second intake hole 4213 is inclined upwards with respect to the vertical virtual axis X, and the inclination angle is θ, which can be inclined towards the upper left or towards the upper right. Preferably, the inclination angle θ of the orientation of the second intake hole 4213 with respect to the vertical virtual axis X is not less than 70°, and a more preferred inclination angle is 80°.

[0033] In this specific embodiment, the outlet edge 4212 is curved. In other embodiments, the outlet edge 4212 can include two or more (such as three or four) successively connected linear outlet edge units 4212. The wind guiding surface 421 is a free surface extending from the connecting edge 4211 to the outlet edge 4212, and can be, for example, a spherical surface or a free arc surface.

[0034] The deflector 42 has a guiding surface 422 facing away from the wind guiding surface 421 and disposed in the combustion chamber 110, and the guiding surface 422 protrudes towards the inside of the combustion chamber 110.

[0035] External gas will be introduced into the combustion chamber 110 through multiple intake structures 40 respectively. During the introduction process, the air flow will first pass through the first intake hole 41, and then the air flow will flow through the wind guiding surface 421 and flow obliquely upwards along the orientation Y of the second intake hole 4213 under the guidance of the wind guiding surface 421 into the combustion chamber 110. Due to the Laval effect, the air flow is accelerated when passing through the intake structure 40 when flowing into the combustion chamber 110, and the accelerated second air flow G2 will cause the flame to flow out of the combustion chamber 110 more quickly, thereby improving the combustion firepower.

[0036] The outside air is guided by a plurality of intake structures 40 to form a plurality of second airflows G2 flowing obliquely. After the plurality of second airflows G2 converge with the flame in the combustion chamber 110, the flame will be in a spiral intertwined shape, and the unburned substances entrained in the first airflow G1 will be further burned, thereby further increasing the combustion firepower. The effect can be referred to Figure 5 and Figure 6 as shown

[0037] The deflector 42 also plays a blocking role. Specifically, if the airflows directly enter the combustion chamber 110 from the first intake holes 41 without being guided by the air guiding surface 421, the first airflow G1 will impact the airflows directly entering the combustion chamber 110 from the first intake holes 41, causing the airflows flowing out of the first intake holes 41 to disperse without generating a spiral trend. Therefore, the spiral airflows are not stable enough. With the presence of the deflector 42, the first airflow G1 will preferentially impact the guiding surface 422. The guiding surface 422 can block the first airflow G1 to prevent the first airflow G1 from directly impacting the airflows flowing out of the first intake holes 41. After the air guiding surface 421 guides the airflows to generate a spiral trend, they flow from the second intake holes 4213 to the combustion chamber 110 and then converge with the first airflow G1. The second airflow G2 is less likely to be impacted by the first airflow G1. Therefore, the generated spiral intertwined flame is more stable and maintained.

[0038] The guiding surface 422 is preferably a curved surface convex towards the middle of the combustion chamber 110. With such a structural design, on the one hand, it can allow the first airflow G1 to flow smoothly over the curved surface 422 to prevent the first airflow G1 from overly impacting the guiding surface 422 and causing chaos. On the other hand, when the first airflow G1 flows through the guiding surface 422, it will be beneficial to accelerate the gas to pass through the intake structure 40 and flow into the combustion chamber 110, further increasing the speed of the gas flowing into the combustion chamber 110.

[0039] In this specific embodiment, the connecting edge 4211 extends along a part of the contour of the first air inlet hole 41, and the connecting edge 4211 surrounds a part of the first air inlet hole 41. The two end portions of the outlet edge 4212 are respectively connected to the two end portions of the connecting edge 4211. The inner wall surface 11 of the inner layer wall 10 includes a circumferential surface 111 located at the upper end of the inner layer wall 10 and guiding the airflow flowing out of the air intake structure 40. In specific implementation, the inner layer wall 10 can be designed as a cylinder, so that the entire inner wall surface 11 and the entire outer wall surface 12 of the inner layer wall 10 are circumferential surfaces. The airflow in the ventilation chamber 231 will flow smoothly along the outer wall surface 12 of the inner layer wall 10 to the first air inlet hole 41. When the airflow flows out of the air intake structure 40 under the guidance of the air guiding surface 421, the airflow will directly adhere to the circumferential surface 111 at the upper end of the inner wall surface 11 and naturally spiral upward under the guidance of this circumferential surface 111, making the spiral airflow less likely to disperse and maintaining the stability of the spiral airflow, and then making the spiral intertwined flame more stable.

[0040] Returning to Figure 1 and Figure 2 As shown, the combustion device 100 may further include a flame concentrating hood 50. The flame concentrating hood 50 is arranged at the top of the inner layer wall 10. The inner channel diameter of the flame concentrating hood 50 gradually decreases upward. When the spiral intertwined flame flows towards the flame concentrating hood 50, it will gather and flow out from the top opening 51 of the flame concentrating hood 50. Due to the Laval effect when flowing out, it is accelerated again when ejected, and the flame still forms an intertwined shape at a certain height after flowing out of the top opening 51 of the flame concentrating hood 50. The flame concentrating hood 50 can be independent of the inner layer wall 10. The flame concentrating hood 50 is supported by the ring plate 21 and covers the upper end opening 101 of the inner layer wall 10. When fuel needs to be added to the combustion chamber 110, the flame concentrating hood 50 can be removed. Of course, the flame concentrating hood 50 can also be fixed integrally with the inner layer wall 10.

[0041] Continuing to refer to Figure 2 As shown, an air guiding cylinder 60 is arranged in the combustion chamber 110. The air guiding cylinder 60 is vertically installed on the tray 33. The side wall of the air guiding cylinder 60 is provided with air guiding holes 61, and external gas can enter the inside of the air guiding cylinder 60 and flow from the air guiding holes 61 into the combustion chamber 110. The top of the air guiding cylinder 60 is provided with a cover plate 62. The edge 63 of the cover plate 62 protrudes from the outer wall of the air guiding cylinder 60 and the edge 63 of the cover plate 62 bends downward. The cover plate 62 forms a flow guiding plate. When the material is put into the combustion chamber 110, the cover plate 62 can serve as a support for the material, thereby preventing the material from blocking the air guiding holes 61, and when the airflow generated by combustion flows upward, it will be guided by the edge 63 of the cover plate 62 and flow reversely to the lower end of the combustion chamber 110. The reversely flowing airflow G3 will contact the material again to make the material continue to burn.

[0042] The combustion device 100 may further include an ash pan 70. The ash pan 70 is connected to the tray 33 through a connecting rod 71, and the ash pan 70 is located below the tray 33. The air flow will flow from the space 232 between the ash pan 70 and the lower end surface of the inner layer wall 10 to the air inlet 102. When the fuel is completely burned, the generated ash will fall onto the ash pan 70 through the ventilation holes.

[0043] The combustion device 100 may further include support legs 80. The support legs 80 are installed at the bottom end of the outer layer wall 20 through screws 81 and are used to support the outer layer wall 20.

[0044] Referring to Figure 7 As shown, the combustion device 100 may further include a bracket 90. The bracket 90 can be supported at the top through the top end of the outer layer wall 20 and / or the flame concentrating hood 50, so that cooking utensils such as boilers can be placed on the bracket 90, and the spiral intertwined flames will spray towards the cooking utensils.

[0045] In the description and claims of this application, the words "comprise / include" and the words "have / include" and their variants are used to specify the presence of the stated features, values, steps or components, but do not exclude the presence or addition of one or more other features, values, steps, components or combinations thereof.

[0046] Some features of the present utility model are described separately in different embodiments for clarity. However, these features can also be described in combination in a single embodiment. On the contrary, some features of the present utility model are described only in a single embodiment for brevity. However, these features can also be described separately or in any suitable combination in different embodiments.

[0047] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A combustion device, characterized in that: The combustion device comprises: Outer wall; An inner wall, wherein the inner wall encloses a combustion chamber having a vertical virtual axis, a ventilation chamber is formed between the inner wall and the outer wall, and external gas can enter the ventilation chamber, a plurality of air intake structures distributed at circumferential intervals are arranged at the upper end of the inner wall, the combustion chamber is connected to the ventilation chamber through the air intake structures, and an air inlet is arranged at the lower end of the inner wall; Wherein, the air intake structure comprises: a first air inlet hole, wherein the first air inlet hole is arranged on the inner wall; A guide, wherein the guide is arranged on the inner side of the inner wall, the guide has an air guide surface facing the first air inlet hole, the air guide surface has a connecting edge and an outlet edge, the connecting edge is connected to the inner wall and extends along the contour of the first air inlet hole, the air guide surface is formed by the connecting edge extending toward the first air inlet hole and toward the interior of the combustion chamber to the outlet edge, the outlet edge defines a second air inlet hole, and the direction of the second air inlet hole is inclined upward relative to the vertical virtual axis, so as to guide the gas flowing through the first air inlet hole toward the interior of the inner wall and obliquely upward.

2. The combustion device according to claim 1, characterized in that: The connecting edge extends along a portion of the contour of the first air inlet hole, the two ends of the outlet edge are respectively connected to the two ends of the connecting edge, and the inner wall surface of the inner wall includes a circumferential surface located at the upper end of the inner wall and guiding the airflow flowing out of the air inlet structure.

3. The combustion device according to claim 2, characterized in that: The outlet edge is curved, or the outlet edge includes two or more linear outlet edge units connected in sequence; the wind guide surface is a free surface extending from the connecting edge to the outlet edge.

4. The combustion device according to claim 2, characterized in that: The outline of the first air inlet hole is circular, elliptical or polygonal.

5. The combustion device according to claim 1, characterized in that: The guide device has a guiding surface facing away from the wind guiding surface, and the guiding surface is a curved surface convex toward the middle of the combustion chamber.

6. The combustion device according to claim 1, characterized in that: The inclination angle of the second air inlet relative to the vertical virtual axis is not less than 70°.

7. The combustion device according to claim 6, characterized in that: The inclination angle of the second air inlet relative to the vertical virtual axis is 80°.

8. The combustion device according to claim 1, characterized in that: The combustion device further comprises a fire gathering hood, which is arranged on the top of the inner wall, and the inner channel diameter of the fire gathering hood gradually decreases upwards.

9. The combustion device according to claim 1, characterized in that: The combustion device also includes an adjustment plate, the lower end of the inner wall is accommodated inside the outer wall, the outer wall is provided with an air vent, the air vent connects the ventilation chamber and the air inlet, and the adjustment plate can be rotated relative to the outer wall to adjust the size of the ventilation surface of the air vent.

10. The combustion device according to claim 1, characterized in that: An air cylinder is provided in the combustion chamber, and external gas can enter the air cylinder. The side wall of the air cylinder is provided with an air hole, and the top of the air cylinder is provided with a cover plate. The edge of the cover plate protrudes from the outer wall of the air cylinder and the edge of the cover plate is bent downward.

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