A fire grate for a stove having a plurality of combustion chambers

Abstract

This invention discloses an inner sleeve for a wood-burning stove with multiple combustion chambers. It includes an inner sleeve body, with fire vents oriented vertically around the periphery of the inner sleeve body. Pairs of V-shaped fire guides are respectively arranged on both sides of the outer side of each fire vent. The spacing between the pairs of fire guides gradually narrows from the end connected to the inner sleeve body to the end away from the inner sleeve body. The advantages of this invention are: it plays a good role in retaining fire and heating, has a good heat transfer effect, significantly increases the overall temperature of the stove, effectively improves the thermal energy utilization efficiency, prolongs the residence time of the smoke and fire in the combustion chamber, and ultimately plays a role in retaining heat and increasing temperature.

Description

Technical Field

[0001] This invention relates to the technical field of wood-burning stoves, and more specifically to the technical field of wood-burning stove inner sleeves. Background Technology

[0002] Wood-burning stoves are a common heating device used in rural towns and villages during winter. They are typically placed indoors and fueled by burning wood and straw to provide warmth, boil water, or cook. The smoke from the combustion is vented outdoors through a flue. However, the firebox structure of most wood-burning stoves is not ideal, resulting in poor heat transfer and an inability to effectively raise the overall temperature of the stove. This not only fails to heat the room effectively, reducing energy efficiency and wasting heat, but also increases fuel consumption, making them less energy-efficient and environmentally friendly. Furthermore, because indoor wood-burning stoves cannot be completely sealed, smoke from combustion can easily escape into the room through the fuel inlet or heating element, severely impacting indoor air quality. Adding firewood or removing the heating element cover causes heat and smoke to escape directly, significantly polluting the indoor environment. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings by providing a wood-fired stove inner sleeve with multiple combustion chambers that has a good fire-holding heating effect, can achieve a good heat transfer effect, can significantly increase the overall temperature of the stove, effectively improve the thermal energy utilization efficiency, and has a good smoke collection effect.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] A wood-burning stove inner sleeve with multiple combustion chambers includes an inner sleeve body. Fire vents are provided on the periphery of the inner sleeve body in a vertical direction. Pairs of fire guide plates in a figure-eight shape are provided on both sides of the outer side of each fire vent. The distance between the pairs of fire guide plates gradually narrows from the end that is in contact with the inner sleeve body to the end that is away from the inner sleeve body.

[0006] The vent is a continuous through hole running vertically.

[0007] The fire port is an opening that runs vertically.

[0008] The vent is a combination of a continuous through hole and an opening in the vertical direction.

[0009] The inner sleeve body has an inner fuel inlet. Baffles are provided on both sides of the inner fuel inlet of the inner sleeve body. A first smoke hole is provided on the baffle. An upwardly inclined first partition is provided on both sides of the inner sleeve body behind the baffle. A pair of fire guides near the baffle are located below the first partition. A sealing plate is provided on the top of the other pairs of fire guides except those located below the first partition.

[0010] The beneficial effects that can be achieved by adopting the above-mentioned technical solution in this invention are:

[0011] 1. The inner sleeve of this wood-fired stove is located inside the furnace chamber, forming a gap between the inner sleeve and the furnace chamber. A smoke and fire passage is left between the inner sleeve and the furnace bottom. Within the gap, multiple figure-eight-shaped combustion chambers are formed between the paired fire guide plates, the inner sleeve body, and the sealing plate. The combustion chambers are located in the lower part of the gap, and the upper part of the gap is the flue. Fire vents in the vertical direction are opened around the periphery of the inner sleeve body. These fire vents are connected to the combustion chambers. Through these fire vents, and with the help of the suction force, the furnace fire in the inner sleeve body is expanded and introduced into the combustion chamber, and the smoke and fire are drawn into the combustion chamber for complete combustion, which heats the outer wall of the furnace chamber. At the same time, the delayed smoke and fire directly enter the flue above the gap and directly enter the exhaust port, preventing the smoke and fire from escaping outside the furnace.

[0012] After the smoke and flame heat the outer wall of the furnace in the combustion chamber, the remaining smoke flows out through the narrow gap between the paired guide plates and is discharged outdoors through the flue and exhaust port. If the fire opening is too large, the smoke and flame will quickly escape from the inner sleeve body directly through the flue and exhaust port above the gap without stopping. If the fire opening is too small, it is difficult for the smoke and flame to enter the combustion chamber from the inner sleeve body. By setting a pair of V-shaped guide plates at the fire opening of the inner sleeve body, the smoke and flame in the inner sleeve body can be connected with the smoke and flame in the combustion chamber, and burn simultaneously, heating the outer wall of the furnace. The vertical vents serve as ignition points. Once the main flame enters, the adjacent weaker flames naturally follow through these vents into the combustion chamber, preventing the flames from rebounding back into the inner casing. Therefore, the flames inside the inner casing and those in the combustion chamber burn simultaneously. Narrow channels control the heat transfer to the outer wall of the furnace, effectively improving heat transfer. The vertical vents and the paired, V-shaped guide plates work together to ensure proper combustion and heat transfer, while also controlling the rate and amount of firewood burning in the furnace. Sealing plates at the top of the paired guide plates force the flames to concentrate within the gap between the inner casing and the furnace, facilitating heat transfer to the outer wall and raising the stove's temperature. In addition to connecting the inner casing and the furnace, the paired guide plates directly transfer heat to the outer wall, effectively absorbing and transferring heat. They also work together to retain heat, increase temperature, and reduce smoke. The pair of guide plates and the outer wall of the furnace heat up simultaneously, increasing the temperature of the entire furnace and thus playing a good role in maintaining the fire and heating. This has a good heat transfer effect, significantly increasing the overall temperature of the furnace and effectively improving the efficiency of heat energy utilization.

[0013] 2. By providing vertically oriented fire vents around the periphery of the inner casing, the smoke and flames within the inner casing can enter the combustion chamber not only through these vents but also through the smoke and flame channel between the inner casing and the furnace bottom. This increases the smoke and flame channel space, overcoming the shortcomings of relying solely on the furnace for combustion. Furthermore, when the smoke and flame channel is blocked by piled-up firewood or ash in the furnace, the flue gas can still enter the combustion chamber through the vertically oriented fire vents for complete combustion before being discharged, indirectly increasing the height of the firewood pile, the ash accumulation space, and the combustion space. Additionally, this smoke and flame channel facilitates the removal of residual ash from the combustion chamber, providing a certain degree of ash removal functionality.

[0014] 3. Because the paired guide plates are in a figure-eight shape, the figure-eight shaped guide plates play a certain role in limiting the flow of smoke and fire in the inner casing, prolonging the residence time of smoke and fire in the combustion chamber, and ultimately playing the role of retaining heat and increasing temperature. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention after the furnace surface has been welded and fixed.

[0016] Figure 2 The vent is a continuous through hole running vertically. Figure 1 Left-view structural diagram;

[0017] Figure 3 This is a schematic diagram of the structure of the present invention after it is installed inside the furnace.

[0018] Figure 4 for Figure 3 A schematic diagram of the AA cross-sectional structure;

[0019] Figure 5 The fire vent is open both vertically and horizontally. Figure 1 Left-view structural diagram;

[0020] Figure 6 The vent is a combination of a continuous through hole and an opening in the vertical direction. Figure 1 Schematic diagram of the left-side view structure. Detailed Implementation

[0021] Depend on Figure 1 , Figure 2 and Figure 4 As shown, a wood-burning stove inner sleeve with multiple combustion chambers includes an inner sleeve body 1. An inner fuel inlet 2 is provided on the inner sleeve body 1. Baffles 3 are respectively provided on both sides of the inner fuel inlet 2, and first smoke holes 4 are provided on the baffles 3. Behind the baffles 3, on both sides of the inner sleeve body 1, an upwardly inclined first partition 5 and a downwardly inclined second partition 6 are respectively provided. The upper end of the second partition 6 is connected to the baffle 3, forming a first flue duct 7 between the first partition 5 and the second partition 6. A second smoke hole 15 is provided on the inner sleeve body 1 between the first partition 5 and the second partition 6. Above the baffles 3, on both sides of the inner fuel inlet 2, third partitions 8 are respectively provided, flush with the top of the inner fuel inlet 2. Above the inner fuel inlet 2, on both sides of the inner sleeve body 1, fourth partitions 9 are respectively provided, and V-shaped smoke grooves 16 are provided on the fourth partitions 9. A second flue duct 10 is formed between the second partition 6 and the third partition 8, and a third flue duct 11 is formed between the third partition 8 and the fourth partition 9. A vertically oriented fire vent is provided around the periphery of the inner sleeve body 1. This fire vent can be as follows: Figure 2 The continuous through-hole 12 shown in the vertical direction can also be as follows: Figure 5 The vertical opening 28 shown can also be as follows: Figure 6The combination of continuous through holes 12 and openings 28 in the vertical direction is shown. Pairs of V-shaped guide plates 13 are provided on both sides of the ignition port of the inner sleeve body 1 to form a combustion chamber. The spacing between the pairs of guide plates 13 gradually narrows from the end connected to the inner sleeve body 1 to the end away from the inner sleeve body 1. The pairs of guide plates 13 near the baffle 3 are located below the first partition 5. Sealing plates 14 are respectively provided on the top of the other pairs of guide plates 13 except those located below the first partition 5.

[0022] Depend on Figure 3 As shown, in use, the inner sleeve of this wood-burning stove with multiple combustion chambers is first welded and fixed to the top of the inner sleeve body 1, and a heating port 18 is opened on the heating port 17. A cover plate 19 is placed on the heating port 18. Then, the heating port 17 is fixed to the furnace chamber 20, so that the inner sleeve body 1 is located inside the furnace chamber 20, and a furnace bottom 21 is set inside the furnace chamber 20, thereby forming a gap 22 between the inner sleeve body 1 and the peripheral wall of the furnace chamber 20, and a smoke and fire channel 23 between the inner sleeve body 1 and the furnace bottom 21. In this way, a certain height is maintained between the inner sleeve body 1 and the furnace bottom 21, realizing the functions of heat transfer, dust removal, smoke extraction, and ash removal. When burning wood, firewood and other fuels are fed into the furnace chamber 20 through the outer firewood inlet 24 of the furnace chamber 20 and the inner firewood inlet 2 of the inner sleeve body 1. The ash formed after the firewood burns falls from the furnace teeth 25 into the ash hopper 26, and the ash is cleaned out of the furnace chamber 20 through the ash hopper 26. When the fuel in the furnace 20 is burning, some of the smoke and flame enters the combustion chamber from the bottom smoke and flame channel 23 and burns, while some smoke and flame enters the combustion chamber formed by the paired guide plates 13 from the ignition port and burns. After the smoke and flame entering the combustion chamber are fully burned, they enter the exhaust port 27 above the interval 22 from the narrow end of the paired guide plates 13 and are discharged from the furnace 20. Since the paired guide plates 13 in the combustion chamber are V-shaped, the V-shaped guide plates 13 play a certain role in limiting the flow of smoke and flame in the inner sleeve body 1, prolonging the residence time of the smoke and flame in the combustion chamber, and ultimately playing the role of heat retention and temperature increase.

[0023] The baffle 3 creates a semi-enclosed cavity between the inner sleeve body 1 and the periphery of the furnace 20, which helps to form an annular negative pressure zone. This allows the smoke and flame generated during combustion to pass through the bottom of the inner sleeve body 1, further effectively separating the heat energy and flue gas generated during combustion and improving the efficiency of heat energy utilization. The first smoke hole 4, the second flue 10, and the third flue 11 on the baffle 3 can absorb the flue gas at the inner fuel inlet 2 during fuel combustion, concentrating the heat during combustion as much as possible within the inner sleeve body 1. Because the first baffle 5 is inclined upwards and the second baffle 6 is inclined downwards, the first flue 7 is conical. The conical flue can improve the suction force of the flue gas. At the same time, the second smoke hole 15 is opened on the inner sleeve body 1 between the first baffle 5 and the second baffle 6, thus further improving the smoke collection effect at the inner fuel inlet 2, preventing the escape of flue gas, and improving the efficiency of heat energy utilization. When the cover plate 19 at the heating port 18 is closed, the inner sleeve body 1 is under positive pressure, and the fuel burns more completely inside the inner sleeve body 1, which plays a role in smoke elimination and temperature increase. The interlayer between the inner sleeve body 1 and the furnace wall 20 is under negative pressure. When the cover plate 19 at the heating port 18 is opened, the inner sleeve body 1 is under negative pressure, and air enters directly from the heating port 18. The flame is directly downward, effectively ensuring that the flue gas inside the inner sleeve body 1 will not escape from the heating port 18.

Claims

1. A wood-burning stove inner sleeve with multiple combustion chambers, characterized in that: It includes an inner sleeve body, with vertically oriented fire vents on the periphery of the inner sleeve body. On both sides of each fire vent are paired fire guides arranged in a V-shape, the spacing between the paired fire guides gradually narrowing from the end connected to the inner sleeve body to the end away from the inner sleeve body. An inner fuel inlet is provided on the inner sleeve body, and baffles are respectively provided on both sides of the inner fuel inlet. A first smoke hole is provided on each baffle, and a smoke vent is respectively provided on both sides of the inner sleeve body behind the baffle. The first baffle plate is inclined upwards, and the pair of fire guide plates near the baffle plate are located below the first baffle plate. The top of the other pairs of fire guide plates, except those located below the first baffle plate, are respectively provided with sealing plates. The furnace surface is welded and fixed on the top of the inner sleeve body, and a heating port is opened on the furnace surface. A cover plate is placed on the heating port to fix the furnace surface to the furnace chamber, so that the inner sleeve body is located in the furnace chamber. A furnace bottom is set in the furnace chamber, thereby forming a gap between the inner sleeve body and the peripheral wall of the furnace chamber, and forming a smoke and fire channel between the inner sleeve body and the furnace bottom.

2. The inner sleeve of a wood-fired stove with multiple combustion chambers according to claim 1, characterized in that: The vent is a continuous through hole running vertically.

3. The inner sleeve of a wood-fired stove with multiple combustion chambers according to claim 1, characterized in that: The fire port is an opening that runs vertically.

4. The inner sleeve of a wood-fired stove with multiple combustion chambers according to claim 1, characterized in that: The vent is a combination of a continuous through hole and an opening in the vertical direction.

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