Firewood stove inner container and firewood stove applying same
By setting air intake grooves and air inlets at the bottom of the inner liner of the wood-fired stove, combined with external blower equipment, the problem of insufficient oxygen in the later stage of combustion of the wood-fired stove is solved, and the complete combustion and efficient heating of the firewood are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-03-13
AI Technical Summary
In the later stages of combustion, the lack of oxygen in a wood-burning stove leads to incomplete combustion of the wood, affecting the heating effect.
An air intake groove is set at the bottom of the inner liner of the wood-fired stove, and an air inlet is provided at the top of it. External air is forced into the blower chamber through the blower and enters the combustion chamber through multiple air inlets to ensure a sufficient supply of oxygen.
It improves the combustion intensity and heating efficiency of firewood, ensuring complete combustion and meeting the demand for high-power heating.
Smart Images
Figure CN223992259U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a wood-fired stove inner liner and a wood-fired stove using the same. Background Technology
[0002] The inner liner of a wood-burning stove is its core component, primarily used to form the combustion chamber to hold and burn firewood. To ensure that the heat from the burning firewood is concentrated for heating, the inner liner typically has only two openings connecting it to the outside: a firewood inlet for adding firewood into the combustion chamber and a flame outlet for releasing the flames. During the use of the stove, once the firewood in the combustion chamber has begun to burn steadily, the firewood inlet is often sealed to prevent smoke from escaping. This leaves only the flame outlet connecting the inner liner to the outside. However, in this situation, because outside air can only passively enter the inner liner through the flame outlet, which is also where the combustion chamber releases heat, it is difficult for air to passively enter the inner liner. This can lead to incomplete combustion of the firewood in the later stages of combustion due to lack of oxygen, significantly reducing the stove's heating efficiency.
[0003] Therefore, overcoming the aforementioned shortcomings has become an important issue that urgently needs to be addressed by those skilled in the art. Utility Model Content
[0004] This utility model overcomes the shortcomings of the above-mentioned technology and provides a wood-fired stove inner liner and a wood-fired stove using the same.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A wood-burning stove inner liner includes an inner liner body 1, in which a combustion chamber 2 for holding firewood for combustion is formed. The side wall of the inner liner body 1 is provided with a firewood inlet 3 communicating with the combustion chamber 2 for putting firewood in. The top of the inner liner body 1 is provided with a flame outlet 4 communicating with the combustion chamber 2 for releasing flames outward. The bottom of the inner liner body 1 is recessed with an air intake groove 5 protruding into the combustion chamber 2. The top of the air intake groove 5 is provided with at least one first air inlet 51, which connects the air intake groove 5 and the combustion chamber 2.
[0007] Preferably, the air intake groove 5 and the fire outlet 4 are coaxially arranged in the center of the combustion chamber 2.
[0008] Preferably, the height of the combustion chamber 2 is H, the height of the air intake groove 5 is h, and 0.5H≤h≤0.8H.
[0009] Preferably, the top surface of the inner liner body 1 is provided with a plurality of second air inlets 11 arranged in a circumferential and radial array along the fire outlet 4 and communicating with the combustion chamber 2.
[0010] Preferably, the edge of the fire outlet 4 is provided with a wall surface 41 extending upward, and the wall surface 41 is provided with a plurality of third air inlets 42 arranged around the fire outlet 4.
[0011] Preferably, the inner liner body 1 is further provided with a plurality of fourth air inlets 12 that are circumferentially distributed and communicate with the combustion chamber 2 on the side wall.
[0012] Preferably, the bottom of the inner liner body 1 is provided with a plurality of fifth air inlets 13 that communicate with the combustion chamber 2.
[0013] Preferably, the diameter of the flame outlet 4 is D, the diameter of all air inlets is d, and 1mm≤d≤0.05D, and the sum of the areas of all air inlets is less than half the area of the flame outlet.
[0014] A wood-burning stove using the aforementioned wood-burning stove inner liner also includes an outer shell 6, which is used to cover the inner liner body 1 and expose the firewood inlet 3 and the fire outlet 4. A blower chamber 7 is formed between the outer shell 6 and the inner liner body 1, and all air inlets are connected to the blower chamber 7. The outer shell 6 is provided with a blower port 61 that communicates with the blower chamber 7. The blower port 61 is used to connect to an external blower device to deliver fresh air into the blower chamber 7.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. Based on the traditional structure, the inner liner of the wood-burning stove in this case has an air intake groove recessed at the bottom of the main body and protruding into the combustion chamber. The top of the air intake groove is also provided with a first air inlet. In this way, even if the firewood inlet is closed when the firewood is burning, outside air can still enter the combustion chamber through the air intake groove and the first air inlet, so that there is enough air in the combustion chamber to support the complete combustion of the firewood, thereby greatly reducing the possibility of incomplete combustion of firewood and maximizing the utilization of firewood resources.
[0017] 2. The wood-burning stove in this case uses an outer shell to enclose the inner liner, forming a blower chamber between the outer shell and the inner liner. This allows air to be supplied into the blower chamber simply by connecting the air inlet to an external blower. In this way, the air in the blower chamber is forced into the combustion chamber through the air inlets, thus completely solving the problem of unstable passive air intake. This provides sufficient oxygen for the combustion of firewood, enabling it to burn completely and significantly improving the combustion intensity, thus better meeting the requirements of high-power heating. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the inner liner of the wood-burning stove in this case.
[0019] Figure 2 This is a cross-sectional schematic diagram of the inner liner of the wood-fired stove in this case.
[0020] Figure 3 This is a schematic diagram of the wood-burning stove in this case.
[0021] Figure 4 This is a cross-sectional schematic diagram of the wood-burning stove in this case. Detailed Implementation
[0022] The following examples provide a more detailed description of the features and other related characteristics of this utility model, to facilitate understanding by those skilled in the art:
[0023] like Figures 1 to 4 As shown, a wood-burning stove inner liner includes an inner liner body 1, in which a combustion chamber 2 for holding firewood for combustion is formed. The side wall of the inner liner body 1 is provided with a firewood inlet 3 communicating with the combustion chamber 2 for putting firewood in. The top of the inner liner body 1 is provided with a flame outlet 4 communicating with the combustion chamber 2 for releasing flames outward. The bottom of the inner liner body 1 is recessed with an air intake groove 5 protruding into the combustion chamber 2. The top of the air intake groove 5 is provided with at least one first air inlet 51, which connects the air intake groove 5 and the combustion chamber 2.
[0024] As described above, the inner liner of this wood-burning stove, based on the traditional structure, has an air intake groove 5 recessed at the bottom of the inner liner body 1 and protruding into the combustion chamber 2. The top of the air intake groove 5 is also provided with a first air inlet 51. In this way, even if the firewood inlet 3 is closed when the firewood is burning, outside air can still enter the combustion chamber 2 through the air intake groove 5 and the first air inlet 51, so that there is enough air in the combustion chamber to support the complete combustion of the firewood, thereby greatly reducing the possibility of incomplete combustion of firewood and maximizing the utilization of firewood resources.
[0025] like Figures 1 to 4 As shown, preferably, the air intake groove 5 and the fire outlet 4 are coaxially arranged in the center of the combustion chamber 2. In this way, when air enters the combustion chamber 2 from the air intake groove 5 through the first air inlet 51, it can further drive the airflow in the combustion chamber 2 to flow towards the fire outlet 4, so that the flame and heat generated by the burning firewood can be released outward from the fire outlet 4 in a more concentrated manner, thereby further improving the heating efficiency.
[0026] like Figures 1 to 4 As shown, preferably, the height of the combustion chamber 2 is H and the height of the air intake groove 5 is h, and 0.5H≤h≤0.8H.
[0027] As described above, setting the height of the air intake groove 5 to 0.5 to 0.8 times the height of the combustion chamber 2 can prevent the wood in the combustion chamber 2 from piling up above the air intake groove 5 and blocking the first air intake hole 51, thus hindering the air from entering the combustion chamber 2. At the same time, it can also allow the air entering the combustion chamber 2 through the air intake groove 5 and the first air intake hole 51 to reach the core of the combustion chamber 2 directly, thereby covering the main area of wood combustion and avoiding combustion interruption or smoke generation caused by local oxygen deficiency in the wood.
[0028] like Figures 1 to 4 As shown, preferably, the top surface of the inner liner body 1 is provided with a plurality of second air inlets 11 arranged in a circumferential and radial array along the fire outlet 4 and communicating with the combustion chamber 2.
[0029] As described above, the top surface of the inner liner body 1 is also provided with several second air inlets 11, which allow outside air to enter the combustion chamber 2 during the flame rising stage through the second air inlets 11 on the top surface to supplement oxygen, promote the secondary combustion of combustible gases such as carbon monoxide, reduce smoke emissions, and improve thermal energy utilization.
[0030] like Figures 1 to 4 As shown, preferably, the edge of the fire outlet 4 is provided with a wall surface 41 extending upward, and the wall surface 41 is provided with a plurality of third air inlets 42 arranged around the fire outlet 4.
[0031] As described above, by setting a wall 41 at the edge of the fire outlet 4 and circumferentially setting a third air inlet 42 on the wall 41, air can be introduced near the fire outlet 4 to form an "air curtain" effect, thereby enhancing the flame combustion intensity and constraining the flame shape, reducing heat loss and increasing heating concentration.
[0032] like Figures 1 to 4 As shown, preferably, the inner liner body 1 is also provided with a number of fourth air inlets 12 that are circumferentially distributed and communicate with the combustion chamber 2 on the side wall. In this way, air can enter the combustion chamber 2 through the fourth air inlets 12 on the side wall of the inner liner body 1, providing oxygen for the firewood burning around the combustion chamber 2 and ensuring sufficient oxygen supply throughout the combustion process.
[0033] like Figures 1 to 4 As shown, preferably, the bottom of the inner liner body 1 is provided with several fifth air inlets 13 that communicate with the combustion chamber 2. In this way, air can enter the bottom of the combustion chamber 2 through the fifth air inlets 13 at the bottom of the inner liner body 1, providing oxygen at the bottom and accelerating the firewood ignition process. At the same time, it works in conjunction with the air intake groove 5 to form a multi-level air supply system and improve combustion efficiency.
[0034] like Figures 1 to 4 As shown, preferably, the diameter of the flame outlet 4 is D, the diameter of all air inlets is d, and 1mm≤d≤0.05D, and the sum of the areas of all air inlets is less than half the area of the flame outlet 4.
[0035] As described above, by limiting the diameter of the air inlet to between 1 mm and 0.05D, and ensuring that the sum of the areas of all air inlets is less than half the area of the outlet 4, the oxygen supply and the temperature of the combustion chamber 2 can be better balanced. This can both prevent excessive cold air from entering and lowering the combustion temperature, and ensure that there is enough oxygen to support complete combustion and optimize thermal efficiency.
[0036] like Figures 3 to 4 As shown, a wood-burning stove using the aforementioned wood-burning stove inner liner also includes an outer shell 6. The outer shell 6 is used to cover the inner liner body 1 and expose the firewood inlet 3 and the fire outlet 4. A blower chamber 7 is formed between the outer shell 6 and the inner liner body 1. All air inlets are connected to the blower chamber 7. The outer shell 6 is provided with a blower port 61 that communicates with the blower chamber 7. The blower port 61 is used to connect to an external blower device to deliver fresh air into the blower chamber 7.
[0037] As described above, the firewood stove in this case encloses the inner liner body 1 with the outer shell 6, forming a blower chamber 7 between the outer shell 6 and the inner liner body 1. Thus, by simply connecting the blower port 61 to an external blower, air can be supplied into the blower chamber 7. In this way, the air in the blower chamber 7 will be forced into the combustion chamber 2 through the air inlets, thereby completely solving the problem of unstable passive air intake, providing sufficient oxygen for the combustion of firewood, enabling the firewood to burn fully, thus significantly improving the combustion intensity and better meeting the working conditions of high-power heating.
[0038] As stated above, this case protects a wood-burning stove liner and a wood-burning stove using the same liner. All technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.
Claims
1. A fire-pit liner, characterized by The inner container body (1) is provided with a combustion chamber (2) for accommodating wood for combustion, a wood inlet (3) for putting wood into the combustion chamber (2) is arranged on the side wall of the inner container body (1), a fire outlet (4) for releasing flame outward is arranged on the top of the inner container body (1), and an air guide groove (5) is arranged on the bottom of the inner container body (1) and protrudes into the combustion chamber (2).
2. A fire-pot liner according to claim 1, wherein The air guide groove (5) is coaxially arranged with the fire outlet (4) in the center of the combustion chamber (2).
3. The fire-pot liner according to claim 1, wherein The height of the combustion chamber (2) is H, the height of the air guide groove (5) is h, and 0.5H≤h≤0.8H.
4. The fire-pot liner according to claim 1, wherein The top surface of the inner container body (1) is provided with a plurality of second air inlets (11) which are arranged in an array along the circumference and radius of the fire outlet (4) and are communicated with the combustion chamber (2).
5. The fire-pot liner according to claim 1, wherein The edge of the fire outlet (4) is provided with a wall (41) extending upward, and a plurality of third air inlets (42) are arranged on the wall (41) and are arranged circumferentially around the fire outlet (4).
6. The fire-pit liner of claim 1, wherein The side wall of the inner container body (1) is further provided with a plurality of fourth air inlets (12) which are circumferentially distributed and are communicated with the combustion chamber (2).
7. The fire-pot liner according to claim 1, wherein The bottom of the inner container body (1) is provided with a plurality of fifth air inlets (13) which are communicated with the combustion chamber (2).
8. A fire-pot liner according to any one of claims 1 to 7, wherein The diameter of the fire outlet (4) is D, the diameter of all air inlets is d, and 1mm≤d≤0.05D, and the sum of the areas of all air inlets is less than half of the area of the fire outlet (4).
9. A fire pit using the fire pit liner according to any one of claims 1 to 8, characterized in that The outer shell (6) is used to wrap the inner container body (1) and expose the wood inlet (3) and the fire outlet (4), an air blowing cavity (7) is formed between the outer shell (6) and the inner container body (1), all air inlets are communicated with the air blowing cavity (7), the outer shell (6) is provided with an air blowing port (61) which is communicated with the air blowing cavity (7), and the air blowing port (61) is used to be connected with an external air blowing device to send fresh air into the air blowing cavity (7).