Combustion device and combustion assembly

Abstract

The utility model relates to the technical field of gas water heaters, in particular to a combustion device and a combustion assembly. The combustion device comprises a combustion cavity, the combustion cavity comprises an inner shell and an outer shell arranged on the outer side of the inner shell, an air cooling channel is defined between the inner shell and the outer shell, the outer shell is provided with an air inlet convex hull communicated with the air cooling channel, and the air inlet convex hull is provided with an air inlet. The inner shell is provided with an air outlet convex hull communicating with the air cooling channel, the air outlet convex hull is provided with an air outlet, and the orientation of the air inlet is parallel to the height direction of the combustion cavity. The combustion assembly comprises an exhaust fume collecting hood and a combustion device, the inner shell comprises two first wall plates which are oppositely arranged in the length direction, the first wall plates are provided with air outlet convex hulls, first steps are arranged at the top ends of the first wall plates, and the bottom of the exhaust fume collecting hood is installed on the two first steps. And the air inlet flow direction at the air inlet is parallel to the inner surface of the surface shell, so that the surface shell is prevented from vibrating, and the working noise is reduced. Meanwhile, limiting installation of the exhaust fume collecting hood is achieved, and the installation precision and the installation efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heaters, in particular to a combustion device and a combustion assembly. Background Art

[0002] A combustion assembly is arranged inside the front shell of a gas water heater. The combustion assembly includes components such as a burner, a heat exchanger, a water pump, a smoke collecting hood, and a blower. The burner burns gas to heat the water flowing in the heat exchanger. The flue gas generated during the combustion process is collected by the smoke collecting hood and discharged under the action of the blower. The burner and the heat exchanger are arranged inside a combustion cavity. The burner is arranged at the bottom of the combustion cavity, and the heat exchanger is arranged at the top of the combustion cavity.

[0003] In order to reduce the heat transfer from the combustion cavity to the outside, an air-cooling channel is arranged inside the combustion cavity. The air inlet direction at the air inlet of the air-cooling channel is perpendicular to the front shell outside the combustion cavity, which easily causes the front shell to vibrate and increases the working noise of the gas water heater. Summary of the Utility Model

[0004] One of the technical problems to be solved by the utility model is to provide a combustion device, which can effectively solve the technical problem that the vibration of the front shell is caused by the fact that the air inlet direction of the air-cooling channel of the combustion cavity is perpendicular to the front shell in the prior art.

[0005] Another technical problem to be solved by the utility model is to provide a combustion assembly, which can effectively solve the technical problem that the vibration of the front shell is caused by the fact that the air inlet direction of the air-cooling channel of the combustion cavity is perpendicular to the front shell in the prior art.

[0006] The above first technical problem is solved by the following technical solutions:

[0007] A combustion device includes a combustion cavity. The combustion cavity includes an inner shell and an outer shell arranged outside the inner shell. An air-cooling channel is formed between the inner shell and the outer shell. The outer shell is provided with an air inlet boss communicating with the air-cooling channel, and the air inlet boss has an air inlet; the inner shell is provided with an air outlet boss communicating with the air-cooling channel, and the air outlet boss has an air outlet. The orientation of the air inlet is parallel to the height direction of the combustion cavity.

[0008] The combustion device of the utility model has the following beneficial effects compared with the background art:

[0009] Air enters the air-cooling channel through the air inlet of the air inlet boss and flows out of the air-cooling channel through the air outlet of the air outlet boss to achieve heat dissipation of the combustion chamber. The orientation of the air inlet of the air inlet boss is parallel to the height direction of the combustion chamber, so that the air flow direction at the air inlet is parallel to the inner surface of the outer shell outside the combustion device, weakening the impact intensity of the air at the air inlet on the outer shell, avoiding vibration of the outer shell, and reducing the working noise. At the same time, the air inlet boss and the air outlet boss improve the structural strength and stability of the combustion chamber, further avoiding resonance between the combustion chamber and the outer shell.

[0010] In one embodiment, the air inlet boss and the air outlet boss are arranged offset in the height direction of the air-cooling channel.

[0011] In one embodiment, the air inlet boss is provided at the top of the outer shell, and the air outlet boss is provided at the bottom of the inner shell.

[0012] In one embodiment, the air inlet is arranged upward in the height direction of the combustion chamber, and the air outlet is arranged downward in the height direction of the combustion chamber.

[0013] In one embodiment, the outer shell and / or the inner shell are provided with a plurality of flow-dividing bosses extending into the air-cooling channel at intervals in the width direction, and a flow-dividing channel is formed between two adjacent flow-dividing bosses.

[0014] In one embodiment, the inner shell includes an inner surrounding plate and an inner cover plate, the outer shell includes an outer surrounding plate and an outer cover plate, the edges of the inner surrounding plate and the outer surrounding plate are fitted together to form a cavity surrounding plate; the edges of the inner cover plate and the outer cover plate are fitted together to form a cavity cover plate, and the cavity surrounding plate and the cavity cover plate enclose the combustion chamber; both the inside of the cavity surrounding plate and the inside of the cavity cover plate have the air-cooling channel.

[0015] The above second technical problem is solved by the following technical solutions:

[0016] A combustion assembly, including a smoke collecting hood and the above-mentioned combustion device, the inner shell includes two first wall plates oppositely arranged in the length direction, the first wall plates are provided with the air outlet bosses, a first step is provided at the top of the first wall plates, and the bottom of the smoke collecting hood is installed on the two first steps.

[0017] The combustion assembly of the present invention has the following beneficial effects compared with the background art:

[0018] Air enters the air-cooled channel through the air inlet of the air inlet boss and flows out of the air-cooled channel through the air outlet of the air outlet boss to achieve heat dissipation of the combustion chamber. The orientation of the air inlet of the air inlet boss is parallel to the height direction of the combustion chamber, so that the air flow direction at the air inlet is parallel to the inner surface of the outer casing outside the combustion device, weakening the impact intensity of the air at the air inlet on the outer casing, avoiding vibration of the outer casing, and reducing the working noise. At the same time, the air inlet boss and the air outlet boss improve the structural strength and stability of the combustion chamber, further avoiding resonance between the combustion chamber and the outer casing. In addition, by setting the first step, the smoke collecting hood is installed between the two first steps, realizing the limit installation of the smoke collecting hood on the combustion chamber, improving the installation accuracy and installation efficiency of the smoke collecting hood, and ensuring the sealing performance between the smoke collecting hood and the combustion device.

[0019] In one embodiment, two second steps are oppositely arranged along the width direction at the bottom of the smoke collecting hood, and the two second steps are respectively in lap joint with the corresponding first steps.

[0020] In one embodiment, a first mounting hole is formed in one of the second steps and is threadedly connected to the corresponding first step through the first mounting hole, and a second mounting hole and an avoidance hole are alternately arranged along the width direction in the other second step and are threadedly connected to the corresponding first step through the second mounting hole;

[0021] The avoidance holes are arranged opposite to the first mounting holes one by one, so that the installation directions of the two second steps respectively threadedly connected to the corresponding first steps are the same.

[0022] In one embodiment, the inner shell includes two second wall plates oppositely arranged along the width direction, the air outlet boss is formed on the second wall plate, and a flange is arranged at the top of the second wall plate;

[0023] The combustion assembly further includes a heat exchanger, and the heat exchanger is installed in a lap joint manner on the two flanges to be clamped between the combustion chamber and the smoke collecting hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a combustion assembly provided by an embodiment of the present invention;

[0025] Figure 2 is an exploded schematic structural diagram of a combustion assembly provided by an embodiment of the present invention;

[0026] Figure 3 is a cross-sectional view of a partial combustion assembly provided by an embodiment of the present invention;

[0027] Figure 4 is Figure 3 a partial enlarged view at A in

[0028] The names and reference numerals of the components in the figure are as follows:

[0029] 1. Combustion cavity; 10. Air-cooling channel; 11. Inner shell; 111. Air inlet boss; 1111. Air inlet; 112. First step; 113. Flange; 12. Outer shell; 121. Air outlet boss; 1211. Air outlet; 13. Cavity enclosure; 14. Cavity cover plate; 15. Flow splitting boss; 16. Auxiliary air inlet hole; 17. Auxiliary air outlet hole;

[0030] 2. Smoke collecting hood; 21. Second step; 211. First mounting hole; 212. Second mounting hole; 213. Avoidance hole; 3. Heat exchanger. Specific embodiments

[0031] To make the technical problems solved by the present utility model, the technical solutions adopted, and the achieved technical effects clearer, the technical solutions of the present utility model will be further described below with reference to the drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings, rather than all of them.

[0032] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between 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.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them.

[0034] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", and "left" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, 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. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0035] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0036] This embodiment provides a combustion assembly, which is mainly used in a gas water heater. Of course, this combustion assembly can also be used in other hot water equipment, which will not be specifically limited here. As Figure 1 shown, the combustion assembly includes a combustion device, a smoke collecting hood 2 and a heat exchanger. The combustion device includes a combustion chamber 1 and a burner installed in the combustion chamber 1. The burner heats the water in the heat exchanger 3 by burning gas, and the flue gas generated by combustion is collected by the smoke collecting hood 2 and discharged under the action of a fan in the smoke collecting hood 2.

[0037] In the existing combustion chamber, an air-cooling channel is provided to reduce the heat transfer from the combustion chamber to the outside. The air inlet direction at the air inlet of the air-cooling channel is perpendicular to the outer surface shell of the combustion chamber, which easily causes the surface shell to vibrate and increases the working noise of the gas water heater.

[0038] To solve the above problems, as Figure 2 and Figure 3 shown, this embodiment also provides a combustion device. The combustion device includes a combustion chamber 1. The combustion chamber 1 includes an inner shell 11 and an outer shell 12 arranged outside the inner shell 11. An air-cooling channel 10 is formed between the inner shell 11 and the outer shell 12. The outer shell 12 is provided with an air inlet boss 111 communicating with the air-cooling channel 10, and the air inlet boss 111 has an air inlet 1111. The inner shell 11 is provided with an air outlet boss 121 communicating with the air-cooling channel 10, and the air outlet boss 121 has an air outlet 1211. The orientation of the air inlet 1111 is parallel to the height direction (the up and down direction in the figure) of the combustion chamber 1. Air enters the air-cooling channel 10 through the air inlet 1111 of the air inlet boss 111 and flows out of the air-cooling channel 10 through the air outlet 1211 of the air outlet boss 121 to achieve heat dissipation and temperature reduction of the combustion chamber 1. Since the orientation of the air inlet 1111 is parallel to the height direction of the combustion chamber 1, the air flow direction at the air inlet 1111 is parallel to the inner surface of the surface shell outside the combustion device, weakening the impact intensity of the air at the air inlet 1111 on the surface shell, avoiding vibration of the surface shell, and reducing the working noise.

[0039] As Figure 2As shown in the figure, the inner shell 11 includes an inner peripheral plate and an inner cover plate, and the outer shell 12 includes an outer peripheral plate and an outer cover plate. The edges of the inner peripheral plate and the outer peripheral plate are attached to each other to form a cavity peripheral plate 13. The edges of the inner cover plate and the outer cover plate are attached to each other to form a cavity cover plate 14, and the cavity peripheral plate 13 and the cavity cover plate 14 enclose a combustion cavity 1. Both the inside of the cavity peripheral plate 13 and the inside of the cavity cover plate 14 have air-cooling channels 10. Specifically, both the outer peripheral plate and the inner peripheral plate are in a right-angled U-shaped structure, so that the cavity peripheral plate 13 is in the shape of a right-angled U-shaped frame. The outer cover plate and the inner cover plate are in a flat plate shape, so that the cavity cover plate 14 is in a flat plate structure. The cavity cover plate 14 is snap-fitted and installed at the side opening of the cavity peripheral plate 13 to enclose the combustion cavity 1 in a tetrahedral structure.

[0040] It should be noted that the inner shell 11 includes two first wall plates arranged opposite to each other in the length direction (the left-right direction in the figure), and the first wall plates are provided with air outlet protrusions 121. The inner shell 11 further includes two second wall plates arranged opposite to each other in the width direction (the front-back direction in the figure), and the second wall plates are provided with air outlet protrusions 121. Specifically, the above-mentioned inner peripheral plate includes the first wall plate on the right side and the two second wall plates on the front and back sides, and the above-mentioned inner cover plate includes the second wall plate on the left side.

[0041] In this embodiment, the air inlet protrusion 111 and the air outlet protrusion 121 are arranged offset in the height direction (the up-down direction in the figure) of the air-cooling channel 10. Through the above arrangement, the distance between the air inlet protrusion 111 and the air outlet protrusion 121 in the height direction of the air-cooling channel 10 is increased, the flow path and time of air in the air-cooling channel 10 are extended, and the heat dissipation and cooling effect of the air-cooling channel 10 is improved.

[0042] Specifically, as Figure 3 shown, the top of the outer shell 12 is provided with an air inlet protrusion 111, and the bottom of the inner shell 11 is provided with an air outlet protrusion 121, further increasing the distance between the air inlet protrusion 111 and the air outlet protrusion 121 in the height direction of the air-cooling channel 10, thereby further extending the flow path and time of air in the air-cooling channel 10 and ensuring that the air-cooling channel 10 has a better heat dissipation and cooling effect.

[0043] Furthermore, as Figure 2 and Figure 3As shown, the air inlet 1111 is arranged upward along the height direction of the combustion chamber 1, and the air outlet 1211 is arranged downward along the height direction of the combustion chamber 1. Since the air inlet 1111 is arranged upward and the air outlet 1211 is arranged downward, the air inlet 1111 is closer to the top of the outer shell 12 and the air outlet 1211 is closer to the bottom of the inner shell 11, so that the flow path of air in the air-cooling channel 10 is the longest, ensuring the best heat dissipation and cooling effect of the air-cooling channel 10. In other embodiments, the air inlet 1111 is arranged downward along the height direction of the combustion chamber 1, and the air outlet 1211 is arranged upward along the height direction of the combustion chamber 1. Or, the air inlets 1111 and the air outlets 1211 face the same direction, that is, both the air inlets 1111 and the air outlets 1211 are arranged upward or downward along the height direction of the combustion chamber 1.

[0044] As Figure 2 and Figure 3 shown, the combustion chamber 1 with a tetrahedral structure has four side walls, and each side wall is composed of a part of the outer shell 12 and a part of the inner shell 11. In each side wall, a plurality of air inlet convex hulls 111 are arranged at intervals along the width direction of the side wall at the top of the outer shell 12, and a plurality of air outlet convex hulls 121 are arranged at intervals along the width direction of the side wall at the bottom of the inner shell 11. Air enters the air-cooling channel 10 from the air inlets 1111 of the plurality of air inlet convex hulls 111 to achieve uniform air intake and ensure the uniformity of heat dissipation and cooling of the air-cooling channel 10. At the same time, the air in the air-cooling channel 10 flows from the air outlets 1211 of the plurality of air outlet convex hulls 121 into the interior of the combustion chamber 1, achieving uniform air outlet to supply air to the burner inside the combustion chamber 1 evenly.

[0045] It should be noted that the number of the air inlet convex hulls 111 and the opening area of the air inlets 1111 on each side wall of the combustion chamber 1 can be flexibly adjusted according to the air intake requirements. The number of the air outlet convex hulls 121 and the opening area of the air outlets 1211 on each side wall of the combustion chamber 1 can be flexibly adjusted according to the air outlet requirements. Here, the number of the air inlet convex hulls 111 and the air outlet convex hulls 121, and the opening area of the air inlets 1111 and the air outlets 1211 are not specifically limited.

[0046] Furthermore, a plurality of auxiliary air inlet holes 16 are formed in the outer shell 12, and external air can also be supplemented into the air-cooling channel 10 through the auxiliary air inlet holes 16 to reduce the air temperature in the air-cooling channel 10 and improve the heat dissipation effect of the air-cooling channel 10. A plurality of auxiliary air outlet holes 17 are arranged on the inner shell 11, and the auxiliary air outlet holes 17 are located below the air outlets 1211, so that most of the air in the air-cooling channel 10 flows out through the air outlets 1211, and a small part of the air flows out through the auxiliary air outlet holes 17, improving the outflow rate of the air in the air-cooling channel 10 to ensure sufficient air supply in the burner.

[0047] It should be noted that the opening area of the auxiliary air inlet hole 16 is much smaller than the opening area of the air inlet 1111. Even though the air flow direction at the auxiliary air inlet hole 16 is perpendicular to the front shell, since the air intake volume is relatively small, it will not affect the front shell, that is, the front shell will not vibrate.

[0048] As Figures 1 to 3 shown, the outer shell 12 and / or the inner shell 11 are provided with a plurality of diversion bosses 15 extending into the air-cooling channel 10 at intervals in the width direction, and a diversion channel is formed between two adjacent diversion bosses 15. By arranging the diversion channel inside the air-cooling channel 10, the air inside the air-cooling channel 10 flows in the diversion channel, so that the air inside the air-cooling channel 10 is evenly distributed.

[0049] Specifically, both the outer shell 12 and the inner shell 11 are formed with a plurality of groove structures arranged at intervals by stamping. The groove structures are recessed towards the air-cooling channel 10 to form the diversion bosses 15, and the diversion bosses 15 extend along the air flow direction in the air-cooling channel 10 (the up and down direction in the figure). In this embodiment, the diversion bosses 15 on the outer shell 12 are located below the air inlet boss 111, and the diversion bosses 15 on the inner shell 11 are located above the air outlet boss 121 to make full use of the surface space of the outer shell 12 and the inner shell 11. It should be noted that the diversion bosses 15 further improve the structural strength and stability of the combustion cavity 1 and can further prevent the combustion cavity 1 from resonating with the front shell.

[0050] As Figure 3 and Figure 4 shown, a first step 112 is provided at the top of the first wall plate, and the bottom of the smoke collecting hood 2 is installed on the two first steps 112. By installing the smoke collecting hood 2 between the two first steps 112, the limit installation of the smoke collecting hood 2 on the combustion cavity 1 is realized, the installation accuracy and installation efficiency of the smoke collecting hood 2 are improved, and the sealing performance between the smoke collecting hood 2 and the combustion device is ensured.

[0051] Specifically, as Figure 3 and Figure 4 shown, two second steps 21 are oppositely arranged along the width direction at the bottom of the smoke collecting hood 2, and the two second steps 21 are respectively in lap joint with the corresponding first steps 112. Through the lap joint of the first step 112 and the second step 21, the installation accuracy and installation efficiency of the smoke collecting hood 2 are further improved, and the installation stability of the smoke collecting hood 2 on the combustion cavity 1 is ensured.

[0052] In this embodiment, a first mounting hole 211 is formed in one second step 21 and is threadedly connected to the corresponding first step 112 through the first mounting hole 211. The other second step 21 is provided with a second mounting hole 212 and an avoidance hole 213 which are staggered in the width direction, and is threadedly connected to the corresponding first step 112 through the second mounting hole 212. The avoidance holes 213 are arranged opposite to the first mounting holes 211 one by one, so that the mounting directions of the two second steps 21 respectively threadedly connected to the corresponding first steps 112 are the same. The combustion chamber 1 and the smoke collecting hood 2 are detachably mounted by bolts, making the mounting operation of the two simple, and improving the mounting strength and mounting efficiency of the combustion chamber 1 and the smoke collecting hood 2.

[0053] It should be noted that when the combustion assembly is assembled, first the cavity enclosure 13 and the smoke collecting hood 2 are assembled, then the heat exchanger 3 is installed on the cavity enclosure 13, and finally the cavity cover 14 and the cavity enclosure 13 are assembled into the combustion chamber 1, and the cavity cover 14 is assembled with the smoke collecting hood 2 into one body at the same time. Since the mounting directions of the two second steps 21 respectively threadedly connected to the corresponding first steps 112 are the same, there is no need to rotate the smoke collecting hood 2 and the cavity enclosure 13 during the assembly process, which simplifies the assembly operation and improves the installation efficiency of the combustion assembly.

[0054] In this embodiment, a first step 112 is provided at the top of the inner enclosure, and another first step 112 is provided at the top of the inner cover. After the second step 21 on the right side of the smoke collecting hood 2 is lapped and fitted with the first step 112 at the top of the inner enclosure, the inner enclosure and the smoke collecting hood 2 are assembled together by bolts. Since an avoidance hole 213 is provided on the second step 21 on the left side of the smoke collecting hood 2, installation tools such as a screwdriver extend from left to right through the avoidance hole 213 to the second step 21 on the right side to complete the threaded connection between the second step 21 on the right side and the first step 112 of the inner enclosure. After the heat exchanger 3 is assembled, the cavity cover 14 and the cavity enclosure 13 are assembled into the combustion chamber 1. After the second step 21 on the left side of the smoke collecting hood 2 is lapped and fitted with the first step 112 at the top of the inner cover, the threaded connection between the second step 21 on the left side and the first step 112 at the top of the inner cover can be completed by installation tools such as a screwdriver, that is, the mounting directions of the two second steps 21 respectively threadedly connected to the corresponding first steps 112 are the same.

[0055] It should be noted that in this embodiment, the heights of the two first wall plates are greater than the height of the second wall plate, so as to facilitate the installation of the heat exchanger 3 on the tops of the two second wall plates, realizing the compact installation of the combustion assembly. Specifically, as Figure 1 and Figure 2As shown, a flange 113 is provided at the top of the second wall panel, and the heat exchanger 3 is lapped and installed on the two flanges 113 to be clamped between the combustion chamber 1 and the smoke collecting hood 2. By providing the flange 113, stable support for the heat exchanger 3 can be achieved, improving the stability of the installation of the heat exchanger 3. In this embodiment, the heat exchanger 3 is respectively threadedly connected to the two flanges 113, making the assembly operation of the heat exchanger 3 simple and improving the assembly strength between the heat exchanger 3 and the combustion chamber 1.

[0056] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A combustion device, characterized in that, It includes a combustion chamber (1), the combustion chamber (1) includes an inner shell (11) and an outer shell (12) arranged outside the inner shell (11), an air-cooling channel (10) is formed between the inner shell (11) and the outer shell (12), an air inlet boss (111) communicating with the air-cooling channel (10) is formed on the outer shell (12), and the air inlet boss (111) has an air inlet (1111); an air outlet boss (121) communicating with the air-cooling channel (10) is formed on the inner shell (11), the air outlet boss (121) has an air outlet (1211), and the orientation of the air inlet (1111) is parallel to the height direction of the combustion chamber (1).

2. The combustion device according to claim 1, characterized in that, The air inlet boss (111) and the air outlet boss (121) are arranged offset in the height direction of the air-cooling channel (10).

3. The combustion device according to claim 2, characterized in that, The air inlet boss (111) is formed at the top of the outer shell (12), and the air outlet boss (121) is formed at the bottom of the inner shell (11).

4. The combustion device according to claim 3, characterized in that, The air inlet (1111) is arranged upward along the height direction of the combustion chamber (1), and the air outlet (1211) is arranged downward along the height direction of the combustion chamber (1).

5. The combustion device according to any one of claims 1 to 4, characterized in that, A plurality of flow-dividing bosses (15) extending into the air-cooling channel (10) are arranged at intervals in the width direction on the outer shell (12) and / or the inner shell (11), and a flow-dividing channel is formed between two adjacent flow-dividing bosses (15).

6. The combustion device according to any one of claims 1 to 4, characterized in that, The inner shell (11) includes an inner peripheral plate and an inner cover plate, the outer shell (12) includes an outer peripheral plate and an outer cover plate, the edges of the inner peripheral plate and the outer peripheral plate are fitted together to form a cavity peripheral plate (13); the edges of the inner cover plate and the outer cover plate are fitted together to form a cavity cover plate (14), and the cavity peripheral plate (13) and the cavity cover plate (14) enclose the combustion chamber (1); the air-cooling channel (10) is provided inside both the cavity peripheral plate (13) and the cavity cover plate (14).

7. Combustion component, characterized in that, It includes a smoke collecting hood (2) and the combustion device according to any one of claims 1 to 6, the inner shell (11) includes two first wall plates arranged opposite to each other in the length direction, the air outlet boss (121) is formed on the first wall plate, and a first step (112) is arranged at the top end of the first wall plate, and the bottom of the smoke collecting hood (2) is installed on the two first steps (112).

8. The combustion assembly according to claim 7, wherein, Two second steps (21) are arranged opposite to each other in the width direction at the bottom of the smoke collecting hood (2), and the two second steps (21) are respectively in lap joint with the corresponding first steps (112).

9. The combustion assembly according to claim 8, wherein One of the second steps (21) is provided with a first mounting hole (211) and is threadedly connected to the corresponding first step (112) through the first mounting hole (211), and the other second step (21) is provided with second mounting holes (212) and avoidance holes (213) arranged staggeredly in the width direction, and is threadedly connected to the corresponding first step (112) through the second mounting holes (212); The avoidance holes (213) are arranged in one-to-one correspondence with the first mounting holes (211) so that the installation directions of the two second steps (21) screwed to the corresponding first steps (112) are the same.

10. The combustion assembly according to claim 7, wherein, The inner shell (11) includes two second wall plates oppositely arranged in the width direction, and the air outlet bosses (121) are formed in the second wall plates; a flange (113) is arranged at the top of the second wall plates; The combustion assembly further includes a heat exchanger (3), and the heat exchanger (3) is lapped and mounted on the two flanges (113) so as to be clamped between the combustion chamber (1) and the smoke collecting hood (2).

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