Furnace end for smokeless firewood stove
Through the internal and external double-layer cylinder structure and ash connection bucket design, the problems of ash blockage and uneven heat are solved, and efficient smoke exhaust and uniform heating of smokeless firewood stoves are achieved, which improves the convenience and adaptability of use and maintenance.
Patent Information
- Application Number
- CN202422438554.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The ashes of existing smokeless firewood stoves are prone to block the smoke exhaust pipes, which is time-consuming and labor-intensive to clean, and the heat is uneven, which affects the cooking and heating effects.
The inner and outer double-layer cylinder structure is used to form a flue return channel, combined with the ash connection bucket and furnace bridge design, so as to separate the ash from the combustion chamber, and smoke is discharged through the flue return channel and chimney effect. At the same time, a fire-burning through hole is installed on the furnace head to even radiate heat.
It realizes convenient cleaning of ashes, improves smoke exhaust effect and heat uniformity, and improves the convenience and adaptability of use and maintenance.
Smart Images
Figure CN223178876U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of stove equipment and relates to a stove for burning firewood, in particular to a burner head for a smokeless firewood stove. Background Art
[0002] Villagers living in the mountains use wood stoves to boil water and cook. In winter when there is no farming, they also gather around the wood stove to keep warm. The simplest smokeless wood stove is a pit dug in the ground. Figure 6 When cooking, just place the pot on the upper port of the stove chamber to cook. When roasting a fire, use the firewood port to keep warm, or directly heat the stove chamber. The ash from burning firewood accumulates in the stove chamber or the bottom of the pit, which can easily block the smoke exhaust tunnel over time. The ash must be cleaned regularly, which is a time-consuming, labor-intensive and dirty task. In addition, the heat generated by the existing wood stove is uneven. When people sit around the wood stove, only the area facing the firewood opening has high heat, while the heat generated by other areas is relatively low. Utility Model Content
[0003] The purpose of the utility model is to provide a burner head for a smokeless wood-fired stove which has the advantages of flexible assembly, convenient use and maintenance, good smoke exhaust effect and is suitable for large-scale production.
[0004] The technical solution for achieving the above-mentioned purpose includes the following contents.
[0005] A burner head for a smokeless wood-fired stove comprises a stove body, an ash hopper, a stove bridge and a smoke shield ring.
[0006] The furnace body is a double-layer cylinder with an outer cylinder enclosed in an inner cylinder. The double-layer cylinder is vertically arranged. The top and bottom of the inner and outer cylinders are open. The space between the outer wall of the inner cylinder and the inner wall of the outer cylinder is a return flue. The space surrounded by the inner cylinder is a combustion chamber. A firewood through hole is provided on the cylinder wall of the outer cylinder. A firewood socket connecting the inner cylinder and the outer cylinder is provided in the return flue. The two ends of the firewood socket are connected to the combustion chamber and the first firewood through hole. The top port of the inner cylinder is lower than the top port of the outer cylinder. The bottom of the inner wall of the inner cylinder is provided with a first annular boss facing inward.
[0007] The ash receiving hopper is a cylindrical container with an open top for receiving ashes. At the top of the outer wall of the ash receiving hopper, a second annular boss adapted to the first annular boss is provided facing outward. During use, the top surface of the first annular boss supports the bottom surface of the second annular boss.
[0008] The grate is used to support the firewood in the combustion chamber. During use, the grate is erected on the open mouth of the ash receiving hopper.
[0009] The smoke baffle is supported by the top end surface of the outer cylinder. During use, the smoke baffle shields above the return flue, and a smoke passage gap is provided between the bottom surface of the smoke baffle and the top end surface of the inner cylinder.
[0010] Furthermore, a fire roasting through-hole and a fire roasting baffle for shielding the fire roasting through-hole are also provided on the barrel wall of the outer cylinder. A chute for installing the fire roasting baffle is provided on the outer wall of the outer cylinder corresponding to the position of the fire roasting through-hole. A fire roasting connecting sleeve connecting the inner cylinder and the outer cylinder is provided in the return flue, and the fire roasting connecting sleeve communicates the combustion chamber and the fire roasting through-hole.
[0011] Furthermore, there are 2 - 3 fire roasting through-holes, which are circumferentially spaced around the outer wall of the outer cylinder.
[0012] Furthermore, both the first firewood through-hole and the fire roasting through-hole are rectangular through-holes. The bottom edge of the rectangular through-hole is parallel to the ground, and the bottom edge of the first firewood through-hole is lower than the bottom edge of the fire roasting through-hole.
[0013] Furthermore, an adjustable inner cylinder is further included. Both the top and bottom of the adjustable inner cylinder are open. Its barrel wall is provided with a second firewood through-hole or a notch. A number of hanging teeth are provided facing outward at the top of the outer wall of the adjustable inner cylinder. During use, the top end surface of the inner cylinder supports the hanging teeth. The adjustable inner cylinder is arranged in the combustion chamber above the grate, and the second firewood through-hole or notch is aligned with the first firewood through-hole.
[0014] Furthermore, a number of ventilation holes are also provided on the barrel wall of the adjustable inner cylinder.
[0015] Furthermore, both the inner cylinder and the outer cylinder are circular cylinders.
[0016] Furthermore, the outer diameter of the inner cylinder is 30 - 35 cm, and the inner diameter of the outer cylinder is 36 - 40 cm.
[0017] Furthermore, an annular skirt portion is also provided facing outward at the bottom of the outer wall of the outer cylinder, which is convenient for installing the bottom of the furnace body onto the stove pit or the hearth.
[0018] When the burner head for a smokeless firewood stove is in use, install the stove body on a stove pit or hearth of appropriate size, and seal the periphery of the connection between the bottom of the outer cylinder and the stove pit or hearth to prevent smoke leakage. First, place the ash hopper at the bottom of the inner cylinder, then place the fire grate on the ash hopper, and place the smoke baffle on the outer cylinder. When starting a fire, some flammable materials can be put into the inner cylinder (combustion chamber) first. After igniting the open fire, add firewood. After the fire starts burning, cooking utensils such as pots and pans can be placed on the smoke baffle for heating. According to the shape of the utensils, appropriate fire baffles can also be stacked on the smoke baffle to reduce the leakage of open fire and improve the heating efficiency. During the heating process, continuously put firewood through the firewood through-hole to keep the fire burning continuously. The soot generated during combustion enters the return flue between the inner and outer cylinders through the smoke passage gap, and then enters the stove pit or hearth. Since the stove pit or hearth is connected to the chimney outside the house, the suction force generated by the chimney effect draws the soot out of the stove pit or hearth and discharges it from the chimney opening. The firewood is placed on the fire grate for burning, and the remaining ashes pass through the gaps (or through-holes) of the fire grate and fall into the ash hopper. After the burner head has been used for a certain period, when the ash in the ash hopper is full, first remove the fire grate, then remove the ash hopper, and pour out the ashes to complete the operation. Further optimization is that several fire-roasting openings are provided on the burner head. The heat radiated outward through the surrounding fire-roasting openings is uniform, which is convenient for roasting by the stove in winter. In summer, the fire-roasting openings can be blocked to prevent heat leakage. Adjusting the setting of the inner cylinder can further block the fire-roasting passage and reduce heat leakage. The bottom edge of the firewood through-hole is set parallel to the ground. When installing the burner head on the stove pit, make the bottom edge flush with the ground. Usually, the melon shell garbage at home can be directly swept into the burner head through the firewood through-hole and burned as fuel, further saving firewood.
[0019] The burner head for a smokeless firewood stove of the present utility model adopts a double-layer cylinder structure inside and outside to form a return flue, and an ash hopper for specifically receiving ashes is installed at the bottom of the burner head. Compared with the prior art in which the combustion chamber and the ash container are integrated, the present utility model realizes the separation of the smoke chamber and the ash container, avoiding the blockage of the smoke exhaust pipe by ashes. The ash container of the present utility model is movably arranged, making it more convenient to pour out the ashes. The burner head has the advantages of convenient maintenance and use, flexible assembly, and strong season adaptability.
[0020] It should be noted that from the perspective of those skilled in the art, providing a stove door that can be opened and closed for the firewood inlet belongs to a conventional technical means, and the structure of the stove door will not be elaborated in this case; the baffle structure and installation for blocking the fire-roasting opening can refer to the stove door or can also be installed in the sliding groove as described in the embodiments of this case; the fire grate is an existing device, whose function is to carry the burning fuel. It has a plate-shaped surface with openings or a strip-shaped surface, and the through-holes and gaps therein are used to pass the ashes. Description of the Drawings
[0021] Figure 1 Schematic diagram of the external structure of the burner head for a smokeless firewood stove in the embodiment;
[0022] Figure 2 Schematic diagram of the bottom side of the burner head (excluding the adjustment inner cylinder, smoke baffle, and furnace door) for the smokeless firewood stove of the embodiment;
[0023] Figure 3 Schematic diagram of the furnace body structure of the embodiment;
[0024] Figure 4 Schematic diagram of the ash receiving hopper structure of the embodiment;
[0025] Figure 5 Schematic diagram of the adjustment inner cylinder structure of the embodiment;
[0026] Figure 6 Schematic diagram of the structure of the existing pit-type smokeless firewood stove.
[0027] In the figure, 1. Furnace body; 1-1. Outer cylinder; 1-1-1. Slide groove; 1-2. Inner cylinder; 1-2-1. First annular boss; 1-3. Return flue; 1-4. Annular skirt part; 2. Ash receiving hopper; 2-1. Second annular boss; 3. Firebridge; 4. Smoke baffle; 4-1. Smoke passage gap; 5. Firewood receiving sleeve; 6. Roasting fire receiving sleeve; 7. Roasting fire baffle; 8. Adjustment inner cylinder; 8-1. Firewood notch; 8-2. Hanging tooth; 9. Chimney. Specific embodiments
[0028] The present utility model will be specifically described below in conjunction with the embodiments.
[0029] See Figures 1 to 6 , a burner head for a smokeless firewood stove, comprising a furnace body 1, an ash receiving hopper 2, a firebridge 3, a smoke baffle 4, and an adjustment inner cylinder 8,
[0030] The furnace body 1 is a double-layer circular cylinder with an outer cylinder 1-1 sleeved over an inner cylinder 1-2. The top and bottom of both the inner and outer cylinders are open. The wall thickness of both the inner and outer cylinders is 4 mm. The outer diameter of the inner cylinder 1-2 is 320 mm, and the inner diameter of the outer cylinder 1-1 is 380 mm. The space between the outer wall of the inner cylinder 1-2 and the inner wall of the outer cylinder 1-1 is an annular return flue 1-3. The cylindrical space surrounded by the inner cylinder 1-2 is the combustion chamber. There is a firewood through-hole and two warming-through holes on the wall of the outer cylinder 1-1. The firewood through-hole and the warming-through holes are arranged at circumferential intervals around the outer cylinder 1-1. Both the firewood through-hole and the warming-through holes are rectangular holes in the shape of a square, and their bottom edges are parallel to the ground. The bottom edge of the firewood through-hole is 30 mm lower than the bottom edge of the warming-through hole. There is a firewood adapter sleeve 5 connecting the inner cylinder 1-2 and the outer cylinder 1-1 in the return flue 1-3. The two ends of the firewood adapter sleeve 5 communicate with the combustion chamber and the firewood through-hole. There are two warming-through adapter sleeves 6 connecting the inner cylinder 1-2 and the outer cylinder 1-1 in the return flue 1-3. The warming-through adapter sleeves 6 communicate with the combustion chamber and the warming-through holes. There is a furnace door and a warming-through baffle 7 on the outer wall of the outer cylinder 1-1. There is a chute 1-1-1 for installing the warming-through baffle 7 corresponding to the position of the warming-through hole.
[0031] The top edge of the inner cylinder 1-2 is 40 mm lower than the top edge of the outer cylinder 1-1. At the bottom of the inner wall of the inner cylinder 1-2, there is a first annular boss 1-2-1 facing inwards.
[0032] The ash pan 2 is a circular cylindrical container with an open top for receiving ashes. On the outside of the top of the ash pan 2, there is a second annular boss 2-1 adapted to the first annular boss 1-2-1. In use, the top surface of the first annular boss 1-2-1 supports the bottom surface of the second annular boss 2-1. The lower part of the ash pan 2 is in the hearth or the stove chamber. The adaptation of the two annular bosses ensures the isolation of the ash pan from the hearth or the stove chamber and prevents the leakage of smoke and dust.
[0033] The grate 3 is used to support the firewood in the combustion chamber. In use, the grate 3 is placed on the open top of the ash pan 2.
[0034] The smoke baffle 4 is supported by the top end surface of the outer cylinder 1-1. In use, the smoke baffle 4 blocks above the return flue 1-3. There is a smoke passage gap 4-1 between the bottom surface of the smoke baffle 4 and the top edge of the inner cylinder 1-2.
[0035] The adjustable inner cylinder 8 is a circular cylinder with open top and bottom. Its inner diameter is 290 mm. There is a firewood notch 8-1 on its wall. On the outside of the top of the outer wall of the adjustable inner cylinder 8, there are several hanging teeth 8-2. In use, the top end surface of the inner cylinder 1-2 supports the hanging teeth 8-2. The adjustable inner cylinder 8 is arranged in the combustion chamber above the grate 3. The firewood notch 8-1 is aligned with the firewood through-hole. There are also several ventilation holes on the wall of the adjustable inner cylinder 8. In this embodiment, on the outside of the bottom of the outer wall of the outer cylinder 1-1, there is also an annular skirt part 1-4 with an outer diameter of 440 mm.
[0036] The burner head for a smokeless firewood stove in this embodiment is provided with an annular skirt portion 1-4, which facilitates its fixed installation on the top of the stove pit. During use, the sealing performance of the joint between the annular skirt portion 1-4 and the stove pit is ensured to prevent smoke and dust from leaking. Also, the bottom edge of the firewood through-hole is flush with the ground, so that combustible garbage can be easily swept into the burner head for combustion. Since the bottom edge of the fire-roasting through-hole is higher than the ground, it also prevents the ashes in the combustion chamber from being squeezed out through the fire-roasting through-hole to pollute the stove top. In winter, the fire-roasting baffle can be removed to facilitate sitting around the stove for warming. In summer, the fire-roasting baffle 7 is installed in the chute 1-1-1 of the outer cylinder 1-1 to block the outward leakage of the open flame from the fire-roasting through-hole. The fire-roasting baffle 7 can move in the chute 1-1-1 to change the area blocking the fire-roasting through-hole, so as to achieve the purpose of adjusting the air flux in the combustion chamber. The function of adjusting the inner cylinder 8 is to further prevent the heat in the combustion chamber from leaking out through the fire-roasting through-hole. The firewood notch 8-1 ensures smooth firewood feeding. After the ash bucket 2 is filled with ashes, it can be directly lifted out from the inner cylinder 1-2 and emptied, without the need to clean the ashes in the stove pit again, which saves time and effort and is simple to maintain.
Claims
1. A burner for a smokeless firewood stove, characterized in that, It includes a furnace body, an ash receiving hopper, a furnace bridge and a smoke baffle ring. The furnace body is a double-layer cylinder with an outer cylinder sleeved on an inner cylinder. The double-layer cylinder is vertically arranged. The top and bottom of the inner and outer cylinders are both open. The space between the outer wall of the inner cylinder and the inner wall of the outer cylinder is a return flue. The space surrounded by the inner cylinder is a combustion chamber. There are firewood through holes on the cylinder wall of the outer cylinder. There is a firewood connecting sleeve connecting the inner cylinder and the outer cylinder in the return flue. The two ends of the firewood connecting sleeve communicate with the combustion chamber and the first firewood through hole. The top port of the inner cylinder is lower than the top port of the outer cylinder. There is a first annular boss on the bottom of the inner cylinder facing inwards. The ash receiving hopper is a cylindrical container with an open top for receiving ashes. There is a second annular boss adapted to the first annular boss on the outside of the top of the ash receiving hopper. During use, the top surface of the first annular boss supports the bottom surface of the second annular boss. The furnace bridge is used to support the firewood in the combustion chamber. During use, the furnace bridge is erected on the open top of the ash receiving hopper. The smoke baffle ring is supported by the top end surface of the outer cylinder. During use, the smoke baffle ring blocks above the return flue. There is a smoke passage gap between the bottom surface of the smoke baffle ring and the top end surface of the inner cylinder.
2. The burner for a smokeless firewood stove according to claim 1, characterized in that, There are also roasting fire through holes and roasting fire baffles for blocking the roasting fire through holes on the cylinder wall of the outer cylinder. There is a chute for installing the roasting fire baffle on the outer wall of the outer cylinder corresponding to the position of the roasting fire through hole. There is a roasting fire connecting sleeve connecting the inner cylinder and the outer cylinder in the return flue. The roasting fire connecting sleeve communicates with the combustion chamber and the roasting fire through hole.
3. The burner for a smokeless firewood stove according to claim 2, wherein, There are 2-3 roasting fire through holes, which are deployed at intervals around the circumference of the outer wall of the outer cylinder.
4. The burner for a smokeless firewood stove according to claim 3, characterized in that, Both the first firewood through hole and the roasting fire through hole are rectangular through holes. The bottom edge of the rectangular through hole is parallel to the ground. The bottom edge of the first firewood through hole is lower than the bottom edge of the roasting fire through hole.
5. The burner for a smokeless firewood stove according to claim 2, characterized in that, It also includes an adjustable inner cylinder. The top and bottom of the adjustable inner cylinder are both open. There are second firewood through holes or notches on its cylinder wall. There are several hanging teeth on the outside of the top of the outer wall of the adjustable inner cylinder. During use, the top end surface of the inner cylinder supports the hanging teeth. The adjustable inner cylinder is arranged in the combustion chamber above the furnace bridge. The second firewood through hole or notch is aligned with the first firewood through hole.
6. The burner for a smokeless firewood stove according to claim 5, characterized in that, There are also several ventilation holes on the cylinder wall of the adjustable inner cylinder.
7. The burner for a smokeless firewood stove according to claim 1, characterized in that, Both the inner cylinder and the outer cylinder are circular cylinders.
8. The burner for a smokeless firewood stove according to claim 7, wherein, The outer diameter of the inner cylinder is 30-35 cm, and the inner diameter of the outer cylinder is 36-40 cm.
9. The burner for a smokeless firewood stove according to claim 7, wherein, There is also an annular skirt portion on the outside of the bottom of the outer wall of the outer cylinder.