Outdoor stove

Abstract

The outdoor stove comprises a main body, a fire plate and a base plate, the main body comprises a combustion cavity, an inner wall and an outer wall, the fire plate is connected with the inner wall, the base plate is located below the main body, the inner wall is provided with a plurality of first air holes, and a first airflow channel is formed between the inner wall and the outer wall; the first air holes are communicated with the first airflow channel and the combustion cavity, the first air holes are located above the fire plate, the fire plate is provided with a plurality of ash leakage holes, the base plate is provided with a plurality of second air holes, and part of air entering the base plate through the second air holes enters the combustion cavity through the ash leakage holes. And the other part of the air enters the combustion cavity through the multiple first air holes, and the amount of all the air entering the combustion cavity through the ash leakage holes is smaller than or equal to the amount of all the air entering the combustion cavity through the first air holes. The outdoor stove is good in user experience.

Description

Technical Field

[0001] This application relates to the technical field of stoves, and more specifically, particularly to an outdoor stove. Background Art

[0002] A stove is a furnace that burns dry firewood, wood pellets, or coal. Ignition of such stoves starts from above the fuel, or the ignited firewood is thrown inside, and then firewood is added from above. The firewood burns on the fire tray of the stove. The stoves of the prior art are generally secondary combustion stoves, which intake air through openings at the bottom and the upper part of the side wall to supply air to the combustibles inside the combustion chamber. For example, as described in "An Outdoor Wood Stove Capable of Secondary Combustion" with the publication number CN218064970U. However, the general intake air method at the bottom and the side wall has no flow splitting structure, resulting in excessive intake air at the bottom and less intake air at the side wall. This causes black smoke or carbon monoxide gas generated by incomplete combustion at the bottom to still not burn fully when the side wall intakes air for secondary combustion, thus leading to a serious phenomenon of smokiness to users. Summary of the Utility Model

[0003] The purpose of this application is to solve the deficiencies in the prior art and propose an outdoor stove that reduces smoke generation to improve the user experience.

[0004] To achieve the above object, this application proposes an outdoor stove, which includes a main body, a fire tray, and a chassis. The main body includes a combustion chamber, an inner wall forming the combustion chamber, and an outer wall located outside the inner wall. The fire tray is connected to the inner wall, the fire tray is located at the bottom of the combustion chamber, the chassis is located below the main body, and the chassis supports the main body and the fire tray. The inner wall has a plurality of first air holes, a first air flow channel is provided between the inner wall and the outer wall, the first air holes communicate the first air flow channel and the combustion chamber, the first air holes are located above the fire tray, the fire tray has a plurality of ash leakage holes, and the chassis has a plurality of second air holes. The air entering the chassis through the plurality of second air holes, a part of it enters the combustion chamber through the plurality of ash leakage holes, and another part enters the combustion chamber through the plurality of first air holes, and the total amount of air entering the combustion chamber through the ash leakage holes is less than or equal to the total amount of air entering the combustion chamber through the first air holes.

[0005] The stove includes an extension part, and the extension part includes a first fixing part fixedly connected to the inner wall, a second fixing part fixedly connected to the outer wall, and a connecting part located between the outer wall and the inner wall. One end of the connecting part is connected to the first fixing part, and the other end of the connecting part is fixed to the second fixing part.

[0006] The connecting part includes a plurality of third air holes, and the third air holes communicate the first air flow channel and the chassis.

[0007] The furnace includes an ash pan, the ash pan is located below the fire pan, the fire pan is located on the chassis, the ash pan has an upward opening, and the projection of the ash leakage holes and the ash pan opening on any horizontal plane is such that the projection of all the ash leakage holes is located inside the projection of the ash pan opening.

[0008] The fire pan has a fourth air hole, the fourth air hole communicates the inside of the chassis and the ash pan, and the gas entering the inside of the ash pan enters the combustion chamber through the ash leakage holes.

[0009] The air intake of all the third air holes is greater than or equal to the air intake of all the fourth air holes.

[0010] The air intake of all the third air holes is 1.5 to 20 times that of all the fourth air holes; or, the total amount of air entering the combustion chamber through the ash leakage holes is 1.5 to 20 times that of the total amount of air entering the combustion chamber through the first air holes; or, the air intake area of all the third air holes is 1.5 to 20 times that of the air intake area of all the fourth air holes.

[0011] The chassis includes a boss, the ash pan includes a bottom wall, the boss supports the bottom wall, and a second air flow channel is provided between the boss and the bottom.

[0012] The boss is provided with a positioning projection, the bottom wall is provided with a positioning groove, and the positioning groove is adapted to the positioning projection.

[0013] The ash pan includes a side wall and a first lip, the fourth air hole is located on the side wall, the first lip is located above the side wall, and the first lip is located below the connecting portion..

[0014] Beneficial effects:

[0015] As can be seen from the above technical solutions, compared with the prior art, the present application has the following advantages:

[0016] 1. Since the amount of air entering the combustion chamber through the ash leakage holes is less than or equal to the amount of air entering the combustion chamber through the first air holes, the black smoke generated by incomplete combustion in the fire pan is secondarily combusted under the action of the air near the first air holes, that is, the black smoke is combusted to reduce the generation of black smoke and improve the user experience;

[0017] 2. All the ash leakage holes are located inside the opening of the ash pan, reducing the possibility of ash leaking out of the ash pan. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional assembly schematic diagram of the furnace according to an embodiment of the present application;

[0019] Figure 2 is Figure 1 A schematic cross-sectional view along line A-A in

[0020] Figure 3 is Figure 2 An enlarged schematic view of circle B in

[0021] Figure 4 is Figure 2 An enlarged schematic view of circle C in

[0022] Figure 5 A schematic view of the fire pan structure of a stove according to an embodiment of the present application;

[0023] Figure 6 A schematic view of the ash pan structure of a stove according to an embodiment of the present application;

[0024] Figure 7 A schematic view of the chassis structure of a stove according to an embodiment of the present application.

[0025] Reference numerals:

[0026] 1 - Main body; 11 - Outer wall; 12 - Inner wall; 121 - First air hole; 13 - Combustion chamber; 14 - First air flow channel; 2 - Fire pan; 21 - Ash leakage hole; 22 - Extension part; 221 - First fixing part; 222 - Connection part; 223 - Second fixing part; 224 - Third air hole; 3 - Ash pan; 31 - Bottom wall; 311 - Positioning groove; 312 - Second air flow channel; 32 - Side wall; 321 - Fourth air hole; 33 - First lip; 4 - Chassis; 41 - Side edge; 411 - Second air hole; 42 - Second lip; 43 - Bottom edge; 44 - Boss; 441 - Positioning protrusion. Detailed implementation manners

[0027] The embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0028] Please refer Figures 1 to 7 As shown, an outdoor stove of the present application includes a main body 1, a fire pan 2, an ash pan 3 and a chassis 4. The fire pan 2 is entirely located inside the main body 1, and the ash pan 3 is partially or entirely located inside the main body 1. Specifically, the main body 1 has a combustion chamber 13, the fire pan 2 is located inside the combustion chamber 13, and the fire pan 2 is located at the bottom of the combustion chamber 13.

[0029] The fire pan 2 is used to carry combustibles such as firewood, wood pellets or coal, and the combustibles are ignited and burned on the fire pan 2. At the same time, air is allowed to flow from the bottom of the main body 1 into the combustion chamber 13 and finally come into contact with the combustibles on the fire pan 2 to promote the combustion of the combustibles. The main structure of the fire pan 2 is made of sheet metal material, and the overall structure of the fire pan 2 is improved through reinforcing ribs or other reinforcing structures, so that the fire pan 2 can maintain its rigidity at ambient temperature and working temperature to bear the weight of the combustibles, and after long-term and repeated combustion, the fire pan 2 can still resist large deformation or warping, such as the ambient temperature ranges from -15 degrees Celsius to 45 degrees Celsius, and the working temperature can reach up to 800 degrees Celsius at most.

[0030] The main body 1 includes an outer wall 11 and an inner wall 12. The side surface of the combustion chamber 13 is defined according to the inner surface of the inner wall 12, and the bottom of the combustion chamber 13 is defined by the fire pan 2, that is, the inner wall 12 and the fire pan 2 form the entire combustion chamber 13. The bottom of the inner wall 12 is fixedly welded to the fire pan 2, which improves the connection stability between the fire pan 2 and the inner wall 12. It can also be fixed by screwing, clamping, etc., or the inner wall 12 and the fire pan 2 are integrally formed by sheet metal, which can be selected according to needs. Of course, in other embodiments, the fire pan 2 is directly placed on the protruding structure of the inner wall 12, so that the fire pan 2 can be disassembled from the inside of the combustion chamber 13, that is, the fire pan 2 is lifted vertically along the inner wall 12.

[0031] The outer wall 11 is located outside the inner wall 12, and the outer wall 11 partially or completely wraps the inner wall 12. The outer wall 11 and the inner wall 12 are fixed at the top of the main body 1, and in the horizontal direction of the main body 1, the outer wall 11 and the inner wall 12 maintain a distance in at least some areas, so that there is a first air flow channel 14 between the outer wall 11 and the inner wall 12, and the horizontal width of the first air flow channel 14 is between 1 cm and 20 cm.

[0032] The inner wall 12 is provided with first air holes 121, and the first air holes 121 are located above the fire pan 2. The first air holes 121 communicate the first air flow channel 14 and the combustion chamber 13, and are used to supplement the air required for the combustion of the combustion chamber 13 to improve the combustion efficiency. At the same time, the heat generated by the inner wall 12 can preheat the air in the first air flow channel 14, increasing the air flow velocity, thereby improving the air intake efficiency of the combustion chamber 13. Specifically, the shape of the first air holes 121 is preferably a circular hole, and it can also be a racetrack circle, polygon or star-shaped hole, which can be selected according to needs.

[0033] The fire pan 2 is provided with a plurality of ash leakage holes 21, and the ash leakage holes 21 are through holes. The ash leakage holes 21 can not only leak the ashes after the combustion of the combustibles from above the fire pan 2 to below the fire pan 2, but also air can flow from below the fire pan 2 to above the fire pan 2 along the ash leakage holes 21 to provide air for the combustibles above the fire pan 2 and improve the combustion efficiency of the combustibles.

[0034] The ash pan 3 is located below the fire pan 2. The ash pan 3 has an opening facing the fire pan 2, and all the ash leakage holes 21 of the fire pan 2 are inside directly above the opening of the ash pan 3, so that the ashes leaking from the fire pan 2 can fall into the ash pan 3.

[0035] An extension part 22 is provided between the outer wall 11 and the inner wall 12. One end of the extension part 22 is fixed to the bottom of the inner wall 12, and the other end of the extension part 22 is fixed to the bottom of the outer wall 11. The fixing method of the extension part 22 to the inner wall 12 is the same as the fixing method of the extension part 22 to the outer wall 11, such as welding, riveting, clamping, etc., and it is more necessary to select a suitable connection method. At the same time, it can be understood that the extension part 22 can be integrally formed by sheet metal with the fire pan 2; or the extension part 22 is integrally formed by sheet metal with the outer wall 11; or the extension part 22 is integrally formed by sheet metal with the fire pan 2. In this embodiment, the extension part 22 is integrally formed by sheet metal with the fire pan 2, and the bottom of the inner wall 12 is welded to the extension part 22, and the bottom of the outer wall 11 is welded to the extension part 22, which improves the overall stability of the stove.

[0036] Specifically, the extension part 22 extends downward or obliquely downward from the main body 1 of the fire pan 2 to form a first fixing part 221, the first fixing part 221 extends horizontally to form a connecting part 222, and the connecting part 222 extends downward or obliquely downward to form a second fixing part 223. The two downward extensions and one horizontal extension make the extension part 22 itself form a structure similar to a reinforcing rib, improving the structural strength of the extension part 22. Specifically, the first fixing part 221 is welded to the bottom of the inner wall 12, and the inner wall 12 is located above the connecting part 222. The second fixing part 223 is welded to the bottom of the outer wall 11, and the horizontal angle of the plane where the first fixing part 221 is located is the same as the horizontal angle of the plane where the inner wall 12 is located. The horizontal angle of the plane where the second fixing part 223 is located is the same as the horizontal angle of the plane where the outer wall 11 is located, so that both the first fixing part 221 and the second fixing part 223 are in surface contact during welding, improving the welding stability, and thus improving the overall connection strength of the stove.

[0037] The ash pan 3 has a bottom wall 31, a side wall 32 and a first lip 33. The ash pan 3 is integrally formed by sheet metal. The side wall 32 is located above the outer peripheral edge of the bottom wall 31. The first lip 33 extends obliquely upward from the top of the side wall 32. The first lip 33 forms the opening of the ash pan 3, and the opening of the ash pan 3 gradually becomes larger from bottom to top. On the projection of the ash leakage hole 21 and the opening of the ash pan 3 on any horizontal plane, the projection of the ash leakage hole 21 is located inside the projection of the opening of the ash pan 3. The gradually increasing opening of the ash pan 3 is beneficial to receiving the ashes falling from the fire pan 2, reducing the possibility of falling out of the ash pan 3.

[0038] The chassis 4 includes a side edge 41, a bottom edge 43, and a second lip 42. The opening of the chassis 4 faces upward, and the second lip 42 is located above the side edge 41. Specifically, the second lip 42 extends horizontally outward from the top of the side edge 41. A boss 44 structure that protrudes toward the opening of the chassis 4 is provided on the bottom edge 43, such that the middle of the bottom edge 43 is kept at a distance from the ground, that is, the edge of the bottom edge 43 contacts the ground, and the top of the boss 44 is kept at a distance from the ground to support the weight of the chassis 4.

[0039] The ash pan 3 is located inside the chassis 4, and the bottom wall 31 of the ash pan 3 abuts against the top of the boss 44, that is, the boss 44 supports the weight of the entire ash pan 3. A positioning groove 311 is provided in the middle of the bottom wall 31, and a positioning protrusion 441 is provided in the middle of the top of the boss 44. The positioning protrusion 441 is adapted to the positioning groove 311, which facilitates the installation of the ash pan 3 and reduces the possibility of the ash pan 3 shaking when it is installed inside the chassis 4.

[0040] The bottom wall 31 of the ash pan 3 is provided with a protrusion toward the opening of the ash pan 3, such that a second air flow channel 312 is formed between the surface of the bottom wall 31 of the ash pan 3 and the surface of the boss 44. The air located inside the chassis 4 can flow along the second air flow channel 312. During the combustion of the combustible, when the ash falls into the fire pan 2, the ash is in a high-temperature state, which causes the bottom wall 31 and the boss 44 in contact with the bottom wall 31 to be in a high-temperature state. When the air flows in the second air flow channel 312, it takes away the heat of the bottom wall 31 and the boss 44 in contact with the bottom wall 31, thereby reducing the temperature of the boss 44. Also, since the boss 44 in contact with the bottom wall 31 does not contact the ground, the heat transferred from the boss 44 to the ground is reduced, thereby protecting the vegetation on the ground.

[0041] The ash pan 3 is detachably connected to the chassis 4, the chassis 4 is detachably connected to the main body 1, and the chassis 4 is detachably connected to the fire pan 2. Specifically, the second lip 42 of the chassis 4 is located inside the outer wall 11, the second lip 42 is located below the connecting portion 222, and the second lip 42 supports the connecting portion 222, thereby supporting the entire fire pan 2. Since the second fixing portion 223 of the fire pan 2 is welded to the outer wall 11 and the first fixing portion 221 of the fire pan 2 is welded to the inner wall 12, the fire pan 2 supports the entire main body 1, so that the second lip 42 of the chassis 4 supports the entire main body 1 and the fire pan 2.

[0042] When the main body 1 and the fire pan 2 are installed on the chassis 4, the main body 1 and the fire pan 2 are directly placed on the chassis 4. When disassembling the main body 1 and the fire pan 2, the main body 1 and the fire pan 2 can be directly lifted and removed to achieve the disassembly of the chassis 4 and the fire pan 2. After removing the main body 1 and the fire pan 2, the ash pan 3 can be lifted and removed to achieve the disassembly of the ash pan 3 and the chassis 4. The disassembly is simple, which is convenient for the user to clean the ash in the ash pan 3.

[0043] The side 41 is provided with a plurality of second air holes 411, the connecting portion 222 is provided with a plurality of third air holes 224, and the side wall 32 is provided with a plurality of fourth air holes 321. A part of the outside air enters the combustion chamber 13 from the opening of the combustion chamber 13, and the other air entering the combustion chamber 13 all enters the inside of the chassis 4 through the second air holes 411 on the side 41. A part of the air inside the chassis 4 enters the first air flow channel 14 through the third air holes 224, a part enters the ash pan 3 through the fourth air holes 321, and the remaining small amount flows in the second air flow channel 312. The air entering the first air flow channel 14 flows towards the combustion chamber 13 through the first air holes 121; the air entering the ash pan 3 enters the inside of the combustion chamber 13 through the ash leakage holes 21 to promote the combustion of the combustibles. The first lip 33 located below the connecting portion 222 is close to the connecting portion 222. Specifically, the distance between the top of the first lip 33 and the connecting portion 222 does not exceed 10 mm, and in this embodiment, it is 5 mm, so as to better collect the ashes and reduce the possibility of the ashes falling outside the ash pan 3. At the same time, since the distance between the first lip 33 and the connecting portion 222 is small, the amount of air entering the ash pan 3 through the gap between the first lip 33 and the connecting portion 222 is small. At the same time, due to the structural design of the first lip 33 being inclined upward and outward, the air flow is more likely to flow towards the third air holes 224. Therefore, the amount of air entering the ash pan 3 through the gap between the first lip 33 and the connecting portion 222 is relatively small compared to the intake ratio of other air holes and has little impact. It can be understood that the second air holes 411 can also be located on the bottom edge 43 and the second lip 42 to increase the amount of air entering the inside of the chassis 4. Specifically, the second air holes 411 are located on the boss 44 of the bottom edge 43.

[0044] The intake area of all the third air holes 224 located at the connecting part 222 is S1, and the intake area of all the fourth air holes 321 located on the side wall 32 is S2, where S1 ≥ S2. That is, in the air entering the chassis 4, the amount of air entering the first air flow channel 14 through the third air holes 224 is not less than the amount of air entering the ash pan 3 through the fourth air holes 321; or in the air entering the combustion chamber 13, the amount of air entering from the ash leakage hole 21 is less than or equal to the amount of air entering from all the first air holes 121. Compared with the prior art, the gas ratio entering the combustion chamber 13 from the first air holes 121 and the ash leakage hole 21 is changed, that is, the amount of air entering the combustion chamber 13 from the first air holes 121 is increased, and the amount of air entering the combustion chamber 13 from the ash leakage hole 21 is relatively reduced. At this time, since the amount of air in the ash leakage hole 21 is reduced, the combustion efficiency of the firewood on the fire pan 2 is reduced. At this time, most of the firewood is incompletely burned. When the gas or wood chips generated by the incomplete combustion of the firewood encounter the air flowing out of the first air holes 121, the gas or wood chips generated by the incomplete combustion are burned again. The firewood first burns on the fire pan 2 and then burns again at the first air holes 121, and finally forms complete combustion, reducing the possibility of black smoke or carbon monoxide gas flowing out of the combustion chamber 13. According to the incomplete combustion formula of carbon and the combustion formula of carbon monoxide, one carbon atom requires one oxygen atom, and one carbon monoxide molecule requires one oxygen atom. According to the air intake structure of the stove in this application, the amount of air entering the first air flow channel 14 through the third air holes 224 is not less than the amount of air entering the ash pan 3 through the fourth air holes 321, that is, the amount of air passing through the first air holes 121 is sufficient to support the air required for the combustion of carbon monoxide generated by the combustion of firewood on the fire pan 2, and thus is sufficient to completely burn the carbon monoxide.

[0045] The first air holes 121 are located above the fire pan 2, so that the stove performs secondary combustion above the fire pan 2. Specifically, the first air holes 121 are located in the middle or at the top of the inner wall 12, so that the secondary combustion occurs in the middle or at the top of the inner wall 12, and thus the outer flame of the complete combustion is located above the middle of the inner wall 12. Since the temperature of the outer flame is relatively high, it is convenient for users to use the outer flame for heating, improving the user's heating experience. At the same time, since the firewood burning on the fire pan 2 is incompletely burned, or the combustion at the fire pan 2 is the inner flame, the temperature of the incomplete combustion or the inner flame is relatively lower than that of the complete combustion or the outer flame. Therefore, the influence on the deformation of the fire pan 2 during barbecue is smaller, improving the service life of the fire pan 2. At the same time, the heat radiation from the fire pan 2 to the ash pan 3 is relatively reduced, reducing the temperature of the ash pan 3, and further reducing the radiation temperature from the ash pan 3 to the chassis 4 and from the chassis 4 to the ground, reducing the damage to the ground vegetation.

[0046] Specifically, S1 = 2S2, and the intake area of all the third air holes 224 located at the connecting part 222 is twice that of all the fourth air holes 321 located at the side wall 32. Of course, according to the size of the product specifications, the numerical ratio can also be S1 = 3S2; or S1 = 4S2; or S1 = 1.5S2; or S1 = 8S2; or S1 = 10S2; or S1 = 20S2, that is, the intake area of all the third air holes 224 located at the connecting part 222 is 1.5 to 20 times that of all the fourth air holes 321 located at the side wall 32. At this time, the amount of air entering the first air flow channel 14 through the third air holes 224 is twice that of the air entering the ash pan 3 through the fourth air holes 321. When secondary combustion occurs near the first air hole 121, not only can sufficient air be provided for the combustion of carbon monoxide, but also sufficient air can be provided for the combustion of wood chips, further reducing the possibility of black smoke flowing out of the combustion chamber 13 and improving the user experience.

[0047] The intake area of all the second air holes 411 located on the side 41 is S3, and S3 ≥ S1 + S2 to meet the intake requirements of all the third air holes 224 and all the fourth air holes 321.

[0048] In the direction from bottom to top, the distance between the outer wall 11 and the inner wall 12 gradually becomes smaller. Specifically, the surface where the inner wall 12 part forming the combustion chamber 13 is perpendicular to the horizontal plane. In the direction from one end of the connecting part 222 to the top end of the outer wall 11, the outer wall 11 gradually inclines towards the inner wall 12, making the cross-section of the first air flow channel 14 gradually smaller from bottom to top. According to Bernoulli's principle, the flow rate of the first air hole 121 is faster, which can not only generate different flame forms at the first air hole 121, but also make the air, the gas and wood chips in the combustion chamber 13 blend more fully, improving the combustion efficiency.

[0049] In some other embodiments, the structure of the second air flow channel 312 on the fire pan 2 is cancelled, and the ash pan 3 is supported by the support columns, that is, support columns are arranged between the bottom wall 31 of the ash pan 3 and the top of the boss 44, so that the bottom wall 31 and the top of the boss 44 are separated from each other, reducing the heat transfer from the ash pan 3 to the bottom edge 43, thereby reducing the damage to the vegetation;

[0050] Or, a protrusion structure is arranged between the bottom wall 31 of the ash pan 3 and the top of the boss 44, converting the contact between the bottom wall 31 and the boss 44 from surface contact to point contact, reducing the heat transfer from the ash pan 3 to the bottom edge 43;

[0051] Alternatively, the height of the positioning protrusion 441 is greater than the groove depth of the positioning groove 311, such that when the ash pan 3 is installed into the chassis 4, except at the positioning protrusion 441 and the positioning groove 311, the bottom wall 31 of the ash pan 3 does not contact the top of the boss 44 of the chassis 4, resulting in an air gap between the bottom wall 31 and the boss 44 in the non-positioning protrusion 441 area of the boss 44, reducing the heat transfer from the ash pan 3 to the bottom edge 43.

[0052] In some other embodiments, the positioning groove 311 and the second air flow channel 312 are removed from the bottom wall 31 of the ash pan 3, the positioning protrusion 441 is removed from the bottom edge 43 of the chassis 4, and the bottom wall 31 of the chassis 4 and the top of the boss 44 are integrally formed. At the same time, feet are provided on the bottom edge 43 of the chassis 4 to raise the height of the chassis 4 and reduce the impact of the heat of the chassis 4 on the ground vegetation.

[0053] Alternatively, the structure of the ash pan 3 is removed, and the chassis 4 is used for the function of receiving ash. At the same time, a baffle is provided below the fire pan 2, and the baffle is fixedly connected to the fire pan 2, such as by welding or clamping. Of course, the baffle can also be integrally formed with the fire pan 2. Moreover, for the projections of the baffle and the ash leakage holes 21 onto any horizontal plane, the projections of all the ash leakage holes 21 are located inside the projection of the baffle, reducing the possibility of ash scattering randomly. In the vertical direction, the end of the baffle away from the fire pan 2 faces the bottom edge 43 of the chassis 4, and the air intake volume entering the combustion chamber 13 through the ash leakage holes 21 is adjusted according to the distance between the baffle and the bottom edge 43. Specifically, the height of the baffle is greater than half of the distance between the fire pan 2 and the bottom edge 43, and the distance between the bottom end of the baffle and the bottom edge 43 is between 1 cm and 2 cm. It can be understood that if the baffle has ventilation holes, the distance between the bottom end of the baffle and the bottom edge 43 will be less than 1 cm.

[0054] In some other embodiments, the amount of air entering the combustion chamber 13 through all the first air holes 121 on the inner wall 12 is Q1, and the amount of air entering the combustion chamber 13 through all the ash leakage holes 21 on the fire pan 2 is Q2, where Q1 ≥ Q2. That is, among the air entering the combustion chamber 13, the amount of air entering through the ash leakage holes 21 is less than or equal to the amount of air entering through all the first air holes 121; or among the air entering the chassis 4, the amount of air entering the first air flow channel 14 through the third air holes 224 is not less than the amount of air entering the ash pan 3 through the fourth air holes 321. Compared with the prior art, the gas ratio entering the combustion chamber 13 from the first air holes 121 and the ash leakage holes 21 is changed, that is, the amount of air entering the combustion chamber 13 from the first air holes 121 is increased, and the amount of air entering the combustion chamber 13 from the ash leakage holes 21 is relatively reduced. At this time, due to the reduction of the amount of air in the ash leakage holes 21, the combustion efficiency of the firewood on the fire pan 2 is reduced. At this time, most of the firewood is incompletely burned. When the gas or sawdust particles generated by the incomplete combustion of the firewood encounter the air flowing out of the first air holes 121, these incompletely burned gases or sawdust particles undergo secondary combustion. The firewood first burns on the fire pan 2 and then undergoes secondary combustion at the first air holes 121, finally forming complete combustion, reducing the possibility of black smoke or carbon monoxide gas flowing out of the combustion chamber 13. According to the incomplete combustion formula of carbon and the combustion formula of carbon monoxide, one carbon atom requires one oxygen atom, and one carbon monoxide molecule requires one oxygen atom. According to the air intake structure of the stove in this application, the amount of air entering the first air flow channel 14 through the third air holes 224 is not less than the amount of air entering the ash pan 3 through the fourth air holes 321, that is, the amount of air passing through the first air holes 121 is sufficient to support the amount of air required for the combustion of carbon monoxide generated by the combustion of firewood on the fire pan 2, and thus is sufficient to completely burn the carbon monoxide.

[0055] The first air holes 121 are located above the fire pan 2, so that the secondary combustion of the stove occurs above the fire pan 2. Specifically, the first air holes 121 are located in the middle or at the top of the inner wall 12, so that the secondary combustion occurs in the middle or at the top of the inner wall 12, and further the outer flame of the complete combustion is located above the middle of the inner wall 12. Since the temperature of the outer flame is relatively high, it is convenient for users to use the outer flame for heating, improving the heating experience of users. At the same time, since the firewood burning on the fire pan 2 is incompletely burned, or the combustion at the fire pan 2 is the inner flame, the temperature of the incomplete combustion or the inner flame is relatively lower than that of the complete combustion or the outer flame. Therefore, the influence on the deformation of the fire pan 2 during barbecue is relatively small, improving the service life of the fire pan 2. At the same time, the heat radiation from the fire pan 2 to the ash pan 3 is relatively reduced, lowering the temperature of the ash pan 3, and further reducing the radiation temperature from the ash pan 3 to the chassis 4 and from the chassis 4 to the ground, reducing the damage to the ground vegetation.

[0056] Specifically, Q1 = 2Q2. The amount of air entering the combustion chamber 13 through all the first air holes 121 on the inner wall 12 is twice the amount of air entering the combustion chamber 13 through all the ash leakage holes 21 on the fire pan 2. Of course, according to the size of the product specifications, the numerical ratio can also be Q1 = 3Q2; or Q1 = 4Q2; or Q1 = 1.5Q2; or Q1 = 8Q2; or Q1 = 10Q2; or Q1 = 20Q2; the amount of air entering the combustion chamber 13 through all the first air holes 121 on the inner wall 12 is 1.5 to 20 times the amount of air entering the combustion chamber 13 through all the ash leakage holes 21 on the fire pan 2. At this time, the amount of air entering the first air flow channel 14 through the third air holes 224 is twice the amount of air entering the ash pan 3 through the fourth air holes 321, so that when secondary combustion occurs near the first air holes 121, not only can sufficient air be provided for the combustion of carbon monoxide, but also sufficient air can be provided for the combustion of wood chips, further reducing the possibility of black smoke flowing out of the combustion chamber 13 and improving the user experience.

[0057] The amount of air entering the chassis 4 through all the second air holes 411 on the side 41 is Q3, and Q3 ≥ Q1 + Q2 to meet the air intake requirements of all the third air holes 224 and all the fourth air holes 321.

[0058] In some other embodiments, the air intake of all the third air holes 224 located at the connecting portion 222 is L1, and the air intake of all the fourth air holes 321 located at the side wall 32 is L2, where L1≥L2. That is, in the air entering the chassis 4, the amount of air entering the first air flow channel 14 through the third air holes 224 is not less than the amount of air entering the ash pan 3 through the fourth air holes 321; or in the air entering the combustion chamber 13, the amount of air entering through the ash leakage hole 21 is less than or equal to the amount of air entering through all the first air holes 121. Compared with the prior art, the gas ratio entering the combustion chamber 13 from the first air holes 121 and the ash leakage hole 21 is changed, that is, the amount of air entering the combustion chamber 13 from the first air holes 121 is increased, and the amount of air entering the combustion chamber 13 from the ash leakage hole 21 is relatively reduced. At this time, since the amount of air in the ash leakage hole 21 is reduced, the combustion efficiency of the firewood on the fire pan 2 is reduced. At this time, most of the firewood is incompletely burned. When the gas or wood chips generated by the incomplete combustion of the firewood encounter the air flowing out of the first air holes 121, the gas or wood chips generated by the incomplete combustion are burned again. The firewood is first burned on the fire pan 2 and then burned again at the first air holes 121, and finally complete combustion is formed, reducing the possibility of black smoke or carbon monoxide gas flowing out of the combustion chamber 13. According to the incomplete combustion formula of carbon and the combustion formula of carbon monoxide, one carbon atom requires one oxygen atom, and one carbon monoxide molecule requires one oxygen atom. According to the air intake structure of the stove in this application, the amount of air entering the first air flow channel 14 through the third air holes 224 is not less than the amount of air entering the ash pan 3 through the fourth air holes 321, that is, the amount of air passing through the first air holes 121 is sufficient to support the air required for the combustion of carbon monoxide generated by the combustion of firewood on the fire pan 2, and thus is sufficient to completely burn the carbon monoxide.

[0059] Specifically, L1 = 2L2, that is, the air intake of all the third air holes 224 located at the connecting portion 222 is twice the air intake of all the fourth air holes 321 located at the side wall 32. Of course, according to the size of the product specifications, the numerical ratio can also be L1 = 3L2; or L1 = 4L2; or L1 = 1.5L2; or L1 = 8L2; or L1 = 10L2; or L1 = 20L2; the air intake of all the third air holes 224 located at the connecting portion 222 is 1.5 to 20 times the air intake of all the fourth air holes 321 located at the side wall 32. At this time, the amount of air entering the first air flow channel 14 through the third air holes 224 is twice the amount of air entering the ash pan 3 through the fourth air holes 321, so that when secondary combustion occurs near the first air holes 121, not only can sufficient air be provided for the combustion of carbon monoxide, but also sufficient air can be provided for the combustion of wood chips, further reducing the possibility of black smoke flowing out of the combustion chamber 13 and improving the user experience.

[0060] The air intake of all the second air holes 411 located on the side 41 is L3, where L3 ≧ L1 + L2, so as to meet the air intake requirements of all the third air holes 224 and all the fourth air holes 321.

[0061] Obviously, it should be noted that the "air volume" mentioned in the specification and claims of this article can be the volume of air or the mass of air, that is, the same measurement unit should be used when judging the air value. The descriptions such as "first", "second", etc. mentioned in the specification and claims of this article are used to distinguish different structures, devices, components, etc., and do not represent the order of priority, nor do they limit that "first" and "second" are of different types. "Including" is an open-ended term, so it should be interpreted as "including but not limited to". "Roughly" and "substantially" mean within an acceptable error range, and those skilled in the art can solve the technical problems within a certain error range and basically achieve the technical effects. Terms such as "connected", "joined", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated. A fixed connection can also be integrally formed; it can be directly connected or indirectly connected through an intermediate medium, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. "Vertical" in this article should be understood within the process error range, or the included angle at the vertical is in the range of 80° to 100°. "Parallel" should be understood within the process error range, with a process error of about 10°. The term "and / or" used in the specification and appended claims of this application refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0062] Although the embodiments of the present application have been shown and described above, it can be understood that the above are only the preferred embodiments of the present application and do not impose any formal limitations on the present application. Although the present application has been disclosed above with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present application. However, as long as it does not depart from the content of the technical solution of the present application, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present application still fall within the scope of the technical solution of the present application.

Claims

1. An outdoor stove, comprising a main body, a fire pan and a chassis, wherein the main body includes a combustion chamber, an inner wall forming the combustion chamber and an outer wall located outside the inner wall, the fire pan is connected to the inner wall, the fire pan is located at the bottom of the combustion chamber, the chassis is located below the main body, and the chassis supports the main body and the fire pan, characterized in that, The inner wall has a plurality of first air holes. A first air flow channel is provided between the inner wall and the outer wall. The first air holes communicate the first air flow channel and the combustion chamber. The first air holes are located above the fire pan. The fire pan has a plurality of ash leakage holes. The chassis has a plurality of second air holes. Among them, the air entering the chassis through the plurality of second air holes, a part of it enters the combustion chamber through the plurality of ash leakage holes, and another part enters the combustion chamber through the plurality of first air holes. And the total amount of air entering the combustion chamber through the ash leakage holes is less than or equal to the total amount of air entering the combustion chamber through the first air holes.

2. The outdoor stove according to claim 1, wherein The stove includes an extension part. The extension part includes a first fixing part fixedly connected to the inner wall, a second fixing part fixedly connected to the outer wall, and a connecting part located between the outer wall and the inner wall. One end of the connecting part is connected to the first fixing part, and the other end of the connecting part is fixed to the second fixing part.

3. The outdoor stove according to claim 2, characterized in that, The connecting part includes a plurality of third air holes. The third air holes communicate the first air flow channel and the chassis.

4. The outdoor stove according to claim 3, characterized in that, The stove includes an ash pan. The ash pan is located below the fire pan. The fire pan is located on the chassis. The ash pan has an upward opening. The projection of the ash leakage holes and the ash pan opening on any horizontal plane. The projections of all the ash leakage holes are located inside the projection of the ash pan opening.

5. The outdoor stove according to claim 4, wherein The fire pan has a fourth air hole. The fourth air hole communicates the chassis and the inside of the ash pan. The gas entering the inside of the ash pan enters the combustion chamber through the ash leakage holes.

6. The outdoor stove according to claim 5, characterized in that, The sum of the air intake amounts of all the third air holes is greater than or equal to the sum of the air intake amounts of all the fourth air holes.

7. The outdoor stove according to claim 6, characterized in that, The sum of the air intake amounts of all the third air holes is 1.5 to 20 times the sum of the air intake amounts of all the fourth air holes; or, the total amount of air entering the combustion chamber through the ash leakage holes is 1.5 to 20 times the total amount of air entering the combustion chamber through the first air holes; or, the sum of the air intake areas of all the third air holes is 1.5 to 20 times the sum of the air intake areas of all the fourth air holes.

8. The outdoor stove according to claim 4, wherein The chassis includes a convex platform. The ash pan includes a bottom wall. The convex platform supports the bottom wall. A second air flow channel is provided between the convex platform and the bottom.

9. The outdoor stove according to claim 8, characterized in that, The convex platform is provided with a positioning projection. The bottom wall is provided with a positioning groove. The positioning groove is adapted to the positioning projection.

10. The outdoor stove according to claim 5, characterized in that, The ash pan includes a side wall and a first lip. The fourth air hole is located on the side wall. The first lip is located above the side wall. The first lip is located below the connecting part.

Images