COMBUSTION DEVICE

Abstract

The present disclosure relates to a combustion device capable of generating a spirally interlaced flame effect and improving combustion firepower. The combustion device includes an outer wall and an inner wall. A ventilation chamber is formed between the inner wall and the outer wall. An upper end of the inner wall is provided with a plurality of air inlet structures distributed at intervals circumferentially. A combustion chamber restricted by the inner wall is connected to the ventilation chamber through the air inlet structure. An air inlet is formed in a lower end of the inner wall. The air inlet structure includes a first air inlet hole and a guider. The guider is provided with a wind guide surface facing towards the first air inlet hole.

Description

TECHNICAL FIELD

The present disclosure relates to a combustion device, in particular to a combustion device capable of generating a spirally interlaced flame effect and improving combustion firepower.

BACKGROUND

The combustion device is a device for burning materials to generate flames for heating, barbecue, cooking and other purposes. In order to ensure that the fuel is sufficiently burned during combustion and avoid the production of excessive unburned materials (such as carbon monoxide and unburned particulate matters), it is necessary to have enough oxygen intake into the combustion device. For this reason, various combustion devices that can allow external gas 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

In view of this, it is necessary to provide a combustion device capable of generating a spirally interlaced flame effect and improving combustion firepower.

The present disclosure provides a combustion device. The combustion device includes:

• • an outer wall;
  • an inner wall, the inner wall being enclosed to form a combustion chamber with a vertical virtual axis, a ventilation chamber being formed between the inner wall and the outer wall, external gas entering the ventilation chamber, an upper end of the inner wall being provided with a plurality of air inlet structures distributed at intervals circumferentially, the combustion chamber being connected to the ventilation chamber through the air inlet structures, and an air inlet being formed in a lower end of the inner wall;
  • wherein, the air inlet structure includes:
  • a first air inlet hole, the first air inlet hole being formed in the inner wall; and
  • a guider, the guider being arranged on the inner wall of the inner wall, the guider being provided with a wind guide surface facing towards the first air inlet hole, the wind guide surface being provided with a connecting edge and an outlet edge, the connecting edge being connected to the inner wall and extending along the contour of the first air inlet hole, the wind guide surface being formed by extending the connecting edge to the interior of the combustion chamber and the outlet edge in the direction of the first air inlet hole, a second air inlet hole being restricted by the outlet edge, and the direction of the second air inlet hole being upwards inclined relative to the vertical virtual axis, so that gas flowing through the first air inlet hole is inclined upwards to be guided towards the interior of the inner wall.

According to the combustion device provided by the present disclosure, when combustible materials are burned in the combustion chamber on the inner wall, hot air can be generated. The hot air can enter into the combustion chamber from the air inlet in the lower end of the inner wall to form a first air flow flowing upwards. Some unburned materials are entrained in the first air flow.

The external gas entering into the ventilation chamber can be guided into the combustion chamber through a plurality of air inlet structures arranged at the upper end of the inner wall respectively. In the guiding process, air flow passes through the first air inlet hole, and then flows through the wind guide surface and flows into the combustion chamber obliquely upward from the second air inlet hole under the guide of the wind guide surface. Due to a Laval effect, the air flow is accelerated when passing through the air inlet structure and flowing into the combustion chamber. After a plurality of second air flows are converged with flames inside the combustion chamber, the flames can be spirally interlaced. The unburned materials entrained in the first air flow can be further burned. At the same time, the accelerated second air flow enables the flames to flow out of the opening in the top of the combustion chamber more quickly, so that the combustion firepower is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic diagram of a combustion device in the specific embodiment of the present disclosure.

FIG. 2 is a section view of FIG. 1.

FIG. 3 is a structural schematic diagram of an inner wall at a first visual angle and an enlarged view of an air inlet structure in the specific embodiment of the present disclosure.

FIG. 4 is a structural schematic diagram of an inner wall at a second visual angle and an enlarged view of an air inlet structure in the specific embodiment of the present disclosure.

FIG. 5 is a downward shape schematic diagram of flames generated by a fuel burned in a combustion device in FIG. 1.

FIG. 6 is a side shape schematic diagram of flames generated by a fuel burned in a combustion device in FIG. 1.

FIG. 7 is a structural schematic diagram of combustion device in FIG. 1 after being additionally provided with a support.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The following clearly and completely describes the technical scheme in the embodiments of the present disclosure with reference to the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure. It can be understood that the attached figures are for reference and illustration purposes only and are not intended to limit the present disclosure. The connection relationships shown in the attached figures are merely for ease of clear description and do not limit the manner of connection.

What needs illustration is that when one component is referred to as being “connected” to the other component, the component may be directly connected to the other component, or a central component may exist possibly. Unless otherwise defined, all technical and scientific terms used herein shall have the same meanings as commonly understood by those skilled in the art to which the present disclosure belongs. What needs illustration is that, except as otherwise noted, the terms such as “install”, “link” and “connect” should be generally understood, for example, the components can be fixedly connected, and also can be detachably connected or integrally connected; the components can be mechanically connected, and also can be electrically connected; and two components can be connected internally. For those skilled in the art, the specific meanings of the terms in the present disclosure can be understood according to specific conditions. The terms used in the specification of the present disclosure are merely intended to describe specific embodiments but not intended to constitute any limitation on the present disclosure.

What needs illustration is that, in the description of the present disclosure, it needs to be illustrated that the indicative direction or position relations of the terms such as “center”, “top”, “bottom”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are direction or position relations illustrated based on the attached figures, just for facilitating the description of the present disclosure and simplifying the description, but not for indicating or hinting that the indicated device or element must be in a specific direction and is constructed and operated in the specific direction, the terms cannot be understood as the restriction of the present disclosure. Moreover, the terms such as “first”, “second” and “third” are just used for distinguishing the description, but cannot be understood to indicate or hint relative importance.

Referring to FIG. 1 and FIG. 2, the specific embodiment of the present disclosure provides a combustion device 100. The combustion device 100 includes an outer wall 20 and an inner wall 10.

An upper end of the outer wall 20 is connected to a ring plate 21, and a placing port 22 is formed in the middle of the ring plate 21.

An upper edge of the inner wall 10 is bent outwards to form a flange 15, a lower end of the inner wall 10 can be put into the outer wall 20 from the placing port 22, and the flange 15 is supported by a top surface of the ring plate 21, so that the inner wall 10 hangs inside the outer wall 20.

When the inner wall 10 is put into the outer wall 20, the placing port 22 is closed by the inner wall 10, and a closed cavity 23 is formed in the outer wall 20. A ventilation chamber 231 is formed between the outer wall 20 and the inner wall 10. An upper end of the ventilation chamber 231 is closed through the ring plate 21. The ventilation chamber 231 is preferably an annular cavity, and the annular cavity is a part of the cavity 23.

A ventilation port 24 is formed in the outer wall 20. The ventilation port 24 can be formed in a side wall of the outer wall 20 circumferentially. An adjusting plate 30 is mounted on the outer wall 20. The adjusting plate 30 is connected to a handle 31. The adjusting plate 30 can rotate relative to the outer wall 20 by switching the handle 31. The ventilation port 24 can be opened or closed by rotating the adjusting plate 30, and the area of a ventilation surface of the ventilation port 24 can be adjusted. And then, the closed cavity 23 can be connected to the outside to change the quantity of external gas entering into the cavity 23. External gas can enter into the ventilation chamber 231 from the ventilation port 24 and flows upwards in the ventilation chamber 231.

The inner wall 10 is enclosed to form a combustion chamber 110 with a vertical virtual axis X. A fuel is burned inside the combustion chamber 110. An opening 101 is formed in an upper end of the inner wall 10 for combustion flames to be ejected. A tray 33 is arranged in the inner wall 10. The fuel is supported by the tray 33. Air holes are formed in the tray 33. An air inlet 102 is formed in the lower end of the inner wall 10. The air inlet 102 can be formed in a side wall of the inner wall 10, or as shown in FIG. 2, an opening is formed in the lower end of the inner wall 10 as the air inlet 102.

When the fuel is burned, the external gas enters into the cavity 23 from the ventilation port 24, and then enters into the combustion chamber 110 from the air inlet 102 to make contact with the fuel. Hot air generated by fuel combustion can flow upwards to form a first air flow G1 flowing upwards, and some unburned materials that are not fully burned are entrained in the first air flow G1.

As shown in FIG. 2 to FIG. 4, an upper end of the inner wall 10 is provided with a plurality of air inlet structures 40 distributed at intervals circumferentially. The combustion chamber 110 is connected to the ventilation chamber 231 through the air inlet structures 40. The external gas enters into the combustion chamber 110 through the guide of the air inlet structure 40 from the ventilation chamber 231. The quantity of the air inlet structures 40 is preferably 10 to 30, more preferably 20.

Specifically, the air inlet structure 40 includes a first air inlet hole 41 and a guider 42. The first air inlet hole 41 is formed in the inner wall 10, and the guider 42 is arranged on the inner side of the inner wall 10. The contour of the first air inlet hole 41 may be circular, elliptical or polygonal without restriction. In the specific embodiment, the contour of the first air inlet hole 41 is circular.

The guider 42 is provided with a wind guide surface 421 facing towards the first air inlet hole 41. The wind guide surface 421 is provided with a connecting edge 4211 and an outlet edge 4212. The connecting edge 4211 is connected to the inner wall 10 and extends along the contour of the first air inlet hole 41. The first air inlet hole 41 is completely surrounded or a part of the first air inlet hole 41 is surrounded. The connecting edge 4211 can be overlapped with the contour of the first air inlet hole 41, and can be circular, elliptical or polygonal. The connecting edge 4211 also can be spaced at a certain distance outward from the contour of the first air inlet hole 41 to the outer side.

The connecting edge 4211 naturally extends into the combustion chamber 110 in the direction of the first inlet hole 41 to the outlet edge 4212, so that the wind guide surface 421 is obtained. The second air inlet hole 4213 is restricted by the outlet edge 4212. The direction Y of the second air inlet hole 4213 is inclined upwards relative to the vertical virtual axis X. The inclination angle is θ, and the second air inlet hole 4213 can be inclined in an upper left direction or inclined in an upper right direction. Preferably, the inclination angle θ of the direction of the second air inlet hole 4213 relative to the vertical virtual axis X is no less than 70°, and the inclination angle is more preferably 80°.

In the specific embodiment, the outlet edge 4212 is bent. In other embodiments, the outlet edge 4212 may include two or more (such as three or four) linear outlet edge 4212 units connected in sequence. The wind guide surface 421 is a free surface extending from the connecting edge 4211 to the outlet edge 4212. For example, the wind guide surface 421 can be a spherical surface or a free arc surface.

The guider 42 is provided with a guide surface 422, at the back of the wind guide surface 421, arranged inside the combustion chamber 110, and the guide surface 422 is convex to the combustion chamber 110.

The external gas can be guided into the combustion chamber 110 through the air inlet structures 40 respectively. In the guiding process, air flow can pass through the first air inlet hole 41 in advance, and then the air flow can flow through the wind guide surface 421 and flows into the combustion chamber 110 obliquely upward along the direction Y of the second air inlet hole 4213 under the guide of the wind guide surface 421. Due to a Laval effect, the air flow is accelerated when passing through the air inlet structure 40 and flowing into the combustion chamber 110. The accelerated second air flow G2 enables the flames to flow out of the combustion chamber 110 more quickly, so that the combustion firepower is improved.

The external gas is guided through the air inlet structures 40 to form a plurality of second air flows G2 obliquely flowing. After the second air flows G2 are converged with the flames inside the combustion chamber 110, the flames are spirally interlaced. Unburned materials entrained in the first air flow G1 are further burned, and then the combustion firepower is further improved with the effect as shown in FIG. 5 and FIG. 6.

The guider 42 also plays a blocking role. Specifically, if the air flow directly enters into the combustion chamber 110 from the first air inlet hole 41 without being guided by the wind guide surface 421, the first air flow G1 can impact the air flow directly entering into the combustion chamber 110 from the first air inlet hole 41, so that the air flow flowing out of the first air inlet hole 41 is scattered without a spiral tendency, and the spiral air flow is not stable enough. With the presence of the guider 42, the first air flow G1 preferentially impacts the guide surface 422, and the guide surface 422 can block the first air flow G1 to prevent the first air flow G1 from directly impacting the air flow flowing out of the first air inlet hole 41. After the wind guide surface 421 guides the air flow to generate a spiral trend, the air flow is converged with the first air flow G1 from the second air inlet hole 4213 to the combustion chamber 110, and the second air flow G2 is less susceptible to the impact of the first air flow G1, so that the generated spirally interlaced flames are more stable and maintained.

The guide surface 422 is preferably a curved surface convex to the middle of the combustion chamber 110. Through such a structural design, on one hand, the first air flow G1 can smoothly flow through the curved surface 422 to avoid the disorder caused by the first air flow G1 excessively impacting the guide surface 422, on the other hand, when the first air flow G1 flows through the guide surface 422, the gas is accelerated to pass through the intake structure 40 and flow into the combustion chamber 110, so that the speed of the gas flowing into the combustion chamber 110 is further increased.

In the specific embodiment, the connecting edge 4211 extends along a part of the contour of the first air inlet hole 41, and a part of the first air inlet hole 41 is surrounded by the connecting edge 4211. Two ends of the outlet edge 4212 are respectively connected to two ends of the connecting edge 4211. The inner wall surface 11 of the inner wall 10 includes a circumferential surface 111 located at the upper end of the inner wall 10 and guiding the air flow flowing out of the air inlet structures 40. Specifically, the inner wall 10 can be designed as a cylinder, so that the inner wall surface 11 and the outer wall surface 12 of the inner wall 10 are circumferential surfaces integrally. The air flow in the ventilation chamber 231 can flow into the first air inlet hole 41 without obstruction along the outer wall surface 12 of the inner wall 10. When the air flow flows out of the air inlet structure 40 under the guide of the wind guide surface 421, the air flow can straightly cling to the circumferential surface 111 at the upper end of the inner wall surface 11 and naturally and spirally moves upwards under the guide of the circumferential surface 111, so that the spiral air flow is not prone to be scattered, the stability of the spiral air flow can be maintained, and then the spirally interlaced flames are more stable.

Referring to FIG. 1 and FIG. 2, the combustion device 100 also includes a fire gathering hood 50. The fire gathering hood 50 is arranged on the top of the inner wall 10. The caliber of an inner channel of the fire gathering hood 50 is gradually decreased upwards. The spirally interlaced flames can be gathered when flowing towards the fire gathering hood 50, and flow out from an opening in the top of the fire gathering hood 50. Due to a Laval effect, the flames are accelerated again during ejection. The flames are still interlaced at a certain height after flowing out of the opening 51 in the top of the fire gathering hood 50. The fire gathering hood 50 can be independent of the inner wall 10. The fire gathering hood 50 is supported by the ring plate 21 and covers the opening 101 in the upper end of the inner wall 10. The fire gathering hood 50 may be removed when it is necessary to add a fuel to the combustion chamber 110. Of course, the fire gathering hood 50 may be integrally fixed to the inner wall 10.

Referring to FIG. 2 continuously, a gas guide barrel 60 is arranged in the combustion device 110. The gas guide barrel 60 is vertically mounted on the tray 33. A gas guide hole 61 is formed in a side wall of the gas guide barrel 60. External gas can enter into the gas guide barrel 60 and flows into the combustion chamber 110 from the gas guide hole 61. The top of the gas guide barrel 60 is provided with a cover plate 62, and the edge 63 of the cover plate 62 protrudes out of an outer wall of the gas guide barrel 60 and is bent downwards. A flow guide plate is formed by the cover plate 62. When materials are put into the combustion chamber 110, the cover plate 62 can be used as a support for the materials, so that the materials can be prevented from blocking the gas guide hole 61. When the air flow generated by combustion flows upward, the air flow can be guided by the edge 63 of the cover plate 62 and flows to the lower end of the combustion chamber 110 in the opposite direction, and the air flow G3 flowing in the opposite direction can make contact with the materials again, so that the materials are burned continuously.

The combustion device 100 may further include an ash receiving tray 70. The ash receiving tray 70 is connected to the tray 33 through a connecting rod 71, and the ash receiving tray 70 is located below the tray 33. The air flow can flow from the space 232 between the ash receiving tray 70 and a lower end surface of the inner wall 10 to the air inlet 102. After the fuel is burned out, the generated ash can fall on the ash receiving tray 70 through the ventilation hole.

The combustion device 100 may further include supporting legs 80. The supporting legs 80 are mounted at the bottom of the outer wall 20 through screws 81 for supporting the outer wall 20.

Referring to FIG. 7, the combustion apparatus 100 may further include a support 90. The support 90 may be supported on the top by the top end of the outer wall 20 and/or the fire gathering hood 50, so that a cooking appliance such as a boiler can be placed on the support 90, and the spirally interwoven flames can be sprayed toward the cooking appliance.

In the specification and claims of the present application, the words “comprising/including” and the words “with/having” and variations thereof are used to specify the presence of a stated feature, value, step, or component, but do not preclude the presence or addition of one or more other features, values, steps, components, or combinations thereof.

Some features of the present disclosure have been described in different embodiments for clarity of illustration. However, these features may also be described in combination with a single embodiment. On the contrary, some features of the present disclosure, for the sake of brevity, are only described in a single embodiment. However, these features may also be described individually or in any suitable combination in different embodiments.

The foregoing descriptions are merely exemplary embodiments of the present disclosure, but are not intended to limit the present disclosure. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure shall fall within the protection scope of the present disclosure.

Claims

1. A combustion device, comprising: an outer wall;an inner wall, the inner wall being enclosed to form a combustion chamber with a vertical virtual axis, a ventilation chamber being formed between the inner wall and the outer wall, external gas entering the ventilation chamber, an upper end of the inner wall being provided with a plurality of air inlet structures distributed at intervals circumferentially, the combustion chamber being connected to the ventilation chamber through the air inlet structures, and an air inlet being formed in a lower end of the inner wall;wherein, the air inlet structure comprises:a first air inlet hole, the first air inlet hole being formed in the inner wall; anda guider, the guider being arranged on the inner wall of the inner wall, the guider being provided with a wind guide surface facing towards the first air inlet hole, the wind guide surface being provided with a connecting edge and an outlet edge, the connecting edge being connected to the inner wall and extending along the contour of the first air inlet hole, the wind guide surface being formed by extending the connecting edge to the interior of the combustion chamber and the outlet edge in the direction of the first air inlet hole, a second air inlet hole being restricted by the outlet edge, and the direction of the second air inlet hole being upwards inclined relative to the vertical virtual axis, so that gas flowing through the first air inlet hole is inclined upwards to be guided towards the interior of the inner wall.

2. The combustion device according to claim 1, wherein the connecting edge extends along a part of the contour of the first air inlet hole, two ends of the outlet edge are respectively connected to two ends of the connecting edge, and an inner wall surface of the inner wall comprises a circumferential surface located at the upper end of the inner wall and guiding to flow out of the air inlet structures.

3. The combustion device according to claim 2, wherein the outlet edge is bent, or the outlet edge comprises two or more than two linear outlet edge units connected in sequence; and 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, wherein the contour of the first air inlet hole is circular, elliptical or polygonal.

5. The combustion device according to claim 1, wherein the guider is provided with a guide surface at the back of the wind guide surface, and the guide surface is a curved surface convex to the middle of the combustion chamber.

6. The combustion device according to claim 1, wherein the inclination angle of the direction of the second air inlet hole relative to the vertical virtual axis is no less than 70°.

7. The combustion device according to claim 6, wherein the inclination angle of the direction of the second air inlet hole relative to the vertical virtual axis is no less than 80°.

8. The combustion device according to claim 1, wherein the combustion device also comprises a fire gathering hood, the fire gathering hood is arranged on the top of the inner wall, and the caliber of an inner channel of the fire gathering hood is gradually decreased upwards.

9. The combustion device according to claim 1, wherein the combustion device also comprises an adjusting plate, the lower end of the inner wall is accommodated inside the outer wall, a ventilation port is formed in the outer wall, the ventilation port is connected to the ventilation chamber and the air inlet, and the adjusting plate can rotate relative to the outer wall so as to adjust the area of a ventilation surface of the ventilation port.

10. The combustion device according to claim 1, wherein a gas guide barrel is arranged in the combustion device, external gas can enter into the gas guide barrel, a gas guide hole is formed in a side wall of the gas guide barrel, the top of the gas guide barrel is provided with a cover plate, and the edge of the cover plate protrudes out of an outer wall of the gas guide barrel and is bent downwards.