Fuel stove

Abstract

The utility model provides a fuel stove which comprises a stove box, a first stove barrel and a fire guide plate, a main combustion chamber is arranged in the stove box, a fire passing hole is formed in the surface of the stove box, the fire passing hole is formed between the main combustion chamber and the lower end of the first stove barrel, the upper end of the first stove barrel extends upwards in the vertical direction, one side of the fire guide plate is fixedly connected to the edge of the fire passing hole, and the other side of the fire guide plate is fixedly connected with the main combustion chamber. The other side of the fire guide plate is close to the central axis of the first furnace barrel, and the dip angle between the length direction of the fire guide plate and the axial direction of the first furnace barrel is larger than zero. By the adoption of the technical scheme, fuel is combusted twice in sequence, after the fuel is combusted for the first time, flames enter the first furnace barrel through the fire passing holes, the fire guide plate prevents the flames from directly heating the lower end of the first furnace barrel through the guiding effect, local overheating of the lower end of the first furnace barrel is avoided, and the combustion efficiency is improved. The service life of the first furnace barrel is prolonged, and heat energy is transmitted to the upper end of the first furnace barrel in the vertical direction, so that a user can fully take and use the heat energy.

Description

TECHNICAL FIELD

[0001] The utility model relates to a stove technical field especially relates to a fuel fire stove. BACKGROUND

[0002] The fire stove is a kind of equipment that generates heat energy by burning fuel, according to the different fuel substance types, fire stove can be divided into kerosene stove, gas stove, fire stove etc.

[0003] In the prior art, the patent literature with publication number "CN112833426A" discloses a civil biomass vertical through the kang water heating stove, which includes a stove base and a stove shell, the stove base is provided with a flue header at one end and a smoke pipe at the other end, the stove shell is installed with an inspection plate, and the inside of the stove shell is provided with a gasification subarea combustion system, a heat exchange purification system, a feeding anti-backfire system, a combustion air supply and ignition system and a cooking system, the gasification subarea combustion system includes a volatile main combustion chamber, the feeding anti-backfire system includes a feeding anti-fire cavity, the bottom end of the feeding anti-fire cavity is connected to the volatile main combustion chamber through a downwardly inclined material guiding pipe, and the stove shell is provided with a controller system. The patent technology realizes non-contact feeding of feeding and combustion, combines with air suction cooling design, and effectively avoids the back-burning, back-heating and back-smoke phenomenon generated during conventional operation and shutdown.

[0004] In the prior art, stoves are equipped with a feeding device for convenient fuel addition, and corresponding ventilation structures are set up to promote complete combustion of fuel. For example, patent document with application number "2024210585294" discloses a combustion device for an open flame stove, including a furnace cylinder, a furnace ring, and a furnace box. The furnace box is provided with a pair of partitions, and the surface of the partitions is provided with a first air distribution hole. The partitions divide the internal space of the furnace box into a first air distribution chamber and a main combustion chamber. The surface of the furnace box is provided with an initial air inlet hole and a material passage hole. The first air distribution chamber is connected to the initial air inlet hole, and the main combustion chamber is connected to the material passage hole. The furnace cylinder is set above the main combustion chamber. The surface of the furnace cylinder is provided with a final air inlet hole. The surface of the furnace ring is provided with a second air distribution hole. The furnace ring is fitted onto the upper end of the furnace cylinder. The second air distribution chamber is formed by the furnace ring surrounding the inner wall of the furnace cylinder. The final air inlet hole and the second air distribution hole are both connected to the second air distribution chamber. This patented technology allows solid fuel to undergo two combustion processes in the presence of oxygen, ensuring complete combustion and thorough release of its heat energy. However, the first and second combustion processes occur sequentially from bottom to top. After the first combustion, the flames shoot upwards in any direction, with some flames directly heating the lower end of the furnace. This causes localized overheating at the lower end of the furnace, resulting in a significant temperature increase. Since users typically only utilize heat energy from the upper end of the furnace, this patented technology structure affects both the furnace's lifespan and prevents users from fully utilizing the heat energy. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a fuel stove.

[0006] This utility model is achieved through the following technical solution.

[0007] This utility model provides a fuel stove, including a furnace box, a first furnace cylinder, and a fire guide plate. The furnace box is provided with a main combustion chamber, and the surface of the furnace box is provided with a fire passage hole, which is located between the main combustion chamber and the lower end of the first furnace cylinder. The upper end of the first furnace cylinder extends upward in a vertical direction. One side of the fire guide plate is fixed to the edge of the fire passage hole, and the other side of the fire guide plate is close to the central axis of the first furnace cylinder. The angle between the length direction of the fire guide plate and the axial direction of the first furnace cylinder is greater than zero.

[0008] The angle between the length of the guide plate and the axial direction of the first furnace cylinder is 30° to 60°.

[0009] The fire passage is circular, and the length of the fire guide plate is 25% to 50% of the inner diameter of the first furnace cylinder.

[0010] The fire guide plate is a rectangular thin plate.

[0011] The furnace box is also fixedly connected with a furnace jacket, and the lower end of the first furnace cylinder is sleeved in the furnace jacket.

[0012] The fuel furnace further comprises a second furnace cylinder, a furnace ring, an air bellow and a combustion air pipe, the first furnace cylinder is contained in the second furnace cylinder, the furnace ring is contained in the upper end of the first furnace cylinder, and the internal space of the furnace ring is used as a secondary combustion chamber, a pair of partitions are further arranged in the furnace box, the main combustion chamber is arranged between the pair of partitions, a first air distribution chamber is formed around the partitions and the inner wall of the furnace box, a plurality of first air distribution holes are arranged on the surface of the partitions, the furnace box is further fixedly connected with one side of the air bellow, the air bellow is in communication with the first air distribution chamber, the other side of the air bellow is fixedly connected with an air blower, a second air distribution chamber is formed around the furnace ring and the inner wall of the first furnace cylinder, second air distribution holes are arranged on the surface of the furnace ring, and the combustion air pipe is arranged between the first furnace cylinder and the second furnace cylinder, one end of the combustion air pipe is in communication with the second air distribution chamber, and the other end of the combustion air pipe is in communication with the air bellow.

[0013] The length direction of the combustion air pipe is parallel to the axial direction of the first furnace cylinder, and the distance between the combustion air pipe and the first furnace cylinder is less than one fourth of the inner diameter of the first furnace cylinder.

[0014] The fuel furnace further comprises a feeding device, the feeding device comprises a first feeding pipe and a second feeding pipe, the first feeding pipe penetrates through the air bellow, one end of the first feeding pipe is provided with a first motor, the other end of the first feeding pipe is in communication with the main combustion chamber, one end of the second feeding pipe is provided with a second motor and is provided with a feeding port, the other end of the second feeding pipe is in communication with the first feeding pipe, the output shaft of the first motor is further fixedly connected with a first auger, and the output shaft of the second motor is further fixedly connected with a second auger.

[0015] The surface of the first feeding pipe is further provided with a ventilation hole, and the ventilation hole is contained in the air bellow.

[0016] The fuel furnace further comprises an ash discharging device, the ash discharging device comprises a foot plate, the foot plate is fixedly connected with the furnace box, the lower end of the second furnace cylinder is flush with the surface of the foot plate, the upper end of the second furnace cylinder is further fixedly connected with a furnace plate, and the relative height difference between the upper end of the first furnace cylinder and the furnace plate is greater than zero.

[0017] The utility model discloses beneficial effect lies in: adopt the technical scheme of the utility model, the first combustion and second combustion of fuel carry out along the direction from bottom to top in proper order, when fuel passes after the first combustion, the flame enters the first furnace cylinder through the fire hole, and the fire plate passes through the orientation effect, and the flame can only gather at the central axis of the first furnace cylinder, avoids the flame direct heating to the lower end of the first furnace cylinder directly, avoids the lower end of the first furnace cylinder partial overheating, is favorable for prolonging the service life of the first furnace cylinder, in addition, the fire plate still makes the heat energy gather at the central axis of the first furnace cylinder, and along the vertical direction transmission to the upper end of the first furnace cylinder, and the user can fully and fully take the heat energy. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the front view of the utility model;

[0019] Figure 2 It is the axonometric view of the utility model;

[0020] Figure 3 It is the plan view of the furnace box of the utility model;

[0021] Figure 4 It is the axonometric view of the feeding device of the utility model;

[0022] Figure 5 It is the plan view of the feeding device of the utility model;

[0023] Figure 6 It is the left view of the feeding device of the utility model;

[0024] Figure 7 It is the front view of the feeding device of the utility model;

[0025] Figure 8 It is the axonometric view of the furnace ring of the utility model;

[0026] Figure 9 It is the axonometric view of the material guide plate of the utility model;

[0027] Figure 10 It is the axonometric view of the ash discharging device of the utility model;

[0028] Figure 11 It is the left view of the ash discharging device of the utility model;

[0029] Figure 12 It is the front view of the ash discharging device of the utility model;

[0030] Figure 13 It is the axonometric view of the support of the utility model.

[0031] In the diagram: 1-Furnace box, 2-First furnace cylinder, 3-Guide plate, 4-Main combustion chamber, 5-Material passage hole, 6-Fire passage hole, 7-Furnace sleeve, 8-Second furnace cylinder, 9-Furnace ring, 10-Blowbox, 11-Combustion air duct, 12-Secondary combustion chamber, 13-Baffle plate, 14-First air distribution chamber, 15-First air distribution hole, 16-Induced draft fan, 17-Second air distribution chamber, 18-Second air distribution hole, 19-Feeding device, 20-First feeding pipe, 21-Second feeding pipe, 22-First motor. 23-Second motor, 24-Feed inlet, 25-First auger, 26-Second auger, 27-Ventilation hole, 28-Ash unloading device, 29-Foot plate, 30-Furnace plate, 31-Cylinder seat, 32-Guide rail box, 33-Ash box, 34-Support, 35-Box cover, 36-Containing groove, 37-Handle, 39-End connecting plate, 40-Electronic ignition rod, 41-Locking nut, 42-Upper cover ring, 43-Lower support ring, 44-Guide plate, 45-Ash unloading hole, 46-Ash leakage hole. Detailed Implementation

[0032] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0033] This utility model provides a fuel stove, such as Figures 1 to 13 As shown, the furnace includes a furnace box 1, a first furnace cylinder 2, and a guide plate 3. The furnace box 1 is provided with a main combustion chamber 4. The surface of the furnace box 1 is provided with a fire passage hole 6, which is located between the main combustion chamber 4 and the lower end of the first furnace cylinder 2. The upper end of the first furnace cylinder 2 extends upward in a vertical direction. One side of the guide plate 3 is fixed to the edge of the fire passage hole 6, and the other side of the guide plate 3 is close to the central axis of the first furnace cylinder 2. The angle between the length direction of the guide plate 3 and the axial direction of the first furnace cylinder 2 is greater than zero.

[0034] Using the technical solution of this utility model, the first and second combustion of fuel proceed sequentially from bottom to top. After the fuel undergoes the first combustion, the flame enters the first furnace tube through the flame hole. The guide plate guides the flame to concentrate only at the central axis of the first furnace tube, preventing the flame from directly heating the lower end of the first furnace tube and avoiding local overheating at the lower end of the first furnace tube. This helps to extend the service life of the first furnace tube. In addition, the guide plate also concentrates the heat energy at the central axis of the first furnace tube and transfers it vertically to the upper end of the first furnace tube, allowing the user to fully utilize the heat energy.

[0035] Specifically, the angle between the length direction of the fireboard 3 and the axial direction of the first furnace cylinder 2 is 30-60 degrees. The fire hole 6 is circular, and the length of the fireboard 3 is 25-50% of the inner diameter of the first furnace cylinder 2. The fireboard 3 is a rectangular thin plate as a whole. The fireboard 3 can make the flame and the released heat energy after the first combustion of the fuel fully gather at the central axis of the first furnace cylinder, avoid the direct heating of the lower end of the first furnace cylinder by the flame, avoid the local overheating of the lower end of the first furnace cylinder, and prolong the service life of the first furnace cylinder, so that the user can fully use the heat energy.

[0036] Specifically, the furnace box 1 is further fixedly connected with a furnace jacket 7, and the lower end of the first furnace cylinder 2 is sleeved in the furnace jacket 7. Therefore, the first furnace cylinder 2 is convenient to assemble or disassemble.

[0037] In addition, the fuel stove further comprises a second furnace cylinder 8, a furnace ring 9, an air bellow 10 and a combustion air pipe 11, the first furnace cylinder 2 is contained in the second furnace cylinder 8, the furnace ring 9 is contained in the upper end of the first furnace cylinder 2, and the inner space of the furnace ring 9 serves as a secondary combustion chamber 12. A pair of partitions 13 are further arranged in the furnace box 1, and the main combustion chamber 4 is arranged between the pair of partitions 13. A first air distribution chamber 14 is formed around the partitions 13 and the inner wall of the furnace box 1. A plurality of first air distribution holes 15 are arranged on the surface of the partitions 13. The furnace box 1 is further fixedly connected with one side of the air bellow 10, and the air bellow 10 is in communication with the first air distribution chamber 14. The other side of the air bellow 10 is fixedly connected with an air blower 16. A second air distribution chamber 17 is formed around the furnace ring 9 and the inner wall of the first furnace cylinder 2. A second air distribution hole 18 is arranged on the surface of the furnace ring 9. The combustion air pipe 11 is arranged between the first furnace cylinder 2 and the second furnace cylinder 8. One end of the combustion air pipe 11 is in communication with the second air distribution chamber 17, and the other end of the combustion air pipe 11 is in communication with the air bellow 10. According to the technical scheme of the utility model, when the fuel is subjected to the first combustion and the second combustion in the furnace box 1 and the furnace ring 9 in sequence, the surface temperature of the first furnace cylinder 2 is increased due to the heat energy generated by the combustion. The heat energy is stored in the air between the first furnace cylinder 2 and the second furnace cylinder 8 due to the blocking effect of the second furnace cylinder 8, so that the air temperature between the first furnace cylinder 2 and the second furnace cylinder 8 is also increased. The air current in the secondary combustion chamber 12 is high-temperature air current through the combustion air pipe 11, so that the flue gas in the secondary combustion chamber 12 reaches the ignition temperature quickly, the air current combustion efficiency is improved, the high-temperature flue gas can be fully combusted, and the heat energy release amount of the stove is improved.

[0038] Further, the length direction of the combustion-supporting air pipe 11 is parallel to the axial direction of the first furnace cylinder 2, and the spacing between the combustion-supporting air pipe 11 and the first furnace cylinder 2 is less than one fourth of the inner diameter of the first furnace cylinder 2. According to the technical scheme of the utility model, the heat energy generated by combustion increases the surface temperature of the first furnace cylinder 2, and the heat energy is stored in the air between the first furnace cylinder 2 and the second furnace cylinder 8 due to the blocking effect of the second furnace cylinder 8, so that the heat energy is not dissipated quickly, the air temperature between the first furnace cylinder 2 and the second furnace cylinder 8 is also increased accordingly, the air flow sucked into the auxiliary combustion chamber 12 through the combustion-supporting air pipe 11 is high-temperature air flow, so that the flue gas in the auxiliary combustion chamber 12 reaches the ignition temperature quickly, thereby improving the combustion-supporting air flow efficiency and enabling the high-temperature flue gas to be fully combusted, so that the heat energy generated by combustion of the fuel can be released to the maximum extent. In addition, the length direction of the combustion-supporting air pipe 11 is parallel to the axial direction of the first furnace cylinder 2, and the spacing between the combustion-supporting air pipe 11 and the first furnace cylinder 2 is as small as possible, so that the heat energy stored between the first furnace cylinder 2 and the second furnace cylinder 8 can further heat the air flow of the combustion-supporting air pipe 11, so that the air flow in the combustion-supporting air pipe 11 reaches the ignition temperature of the flue gas in the first furnace cylinder 2 quickly, thereby improving the combustion-supporting efficiency.

[0039] Specifically, the fuel stove further comprises a feeding device 19, the feeding device 19 comprises a first feeding pipe 20 and a second feeding pipe 21, the first feeding pipe 20 penetrates the air bellow 10, one end of the first feeding pipe 20 is provided with a first motor 22, the other end of the first feeding pipe 20 is communicated with the main combustion chamber 4, one end of the second feeding pipe 21 is provided with a second motor 23 and is provided with a feeding port 24, the other end of the second feeding pipe 21 is communicated with the first feeding pipe 20, the output shaft of the first motor 22 is further fixedly connected with a first auger 25, the output shaft of the second motor 23 is further fixedly connected with a second auger 26, preferably, the surface of the first feeding pipe 20 is further provided with a ventilation hole 27, and the ventilation hole 27 is accommodated in the air bellow 10, the surface of the stove box 1 is further provided with a material passing hole 5, the material passing hole 5 is arranged between one end of the first feeding pipe 20 and the main combustion chamber 4. According to the technical scheme of the utility model, under the guidance of the induced draft fan 16, the air flow in the external environment can quickly enter the combustion-supporting air pipe 11, the air flow is heated by the heat energy generated in the first furnace cylinder 2 during the flow process in the combustion-supporting air pipe 11, and then quickly enters the auxiliary combustion chamber 12, thereby fully supporting the final combustion of the flue gas, improving the stove combustion efficiency, and the air flow in the air bellow 10 can enter the first feeding pipe 20 through the ventilation hole, thereby assisting the combustion of the fuel, avoiding the fuel from being blocked between the inner wall surface of the first feeding pipe 20 and the first auger 25, and ensuring stable fuel supply of the stove.

[0040] In addition, the first air distribution hole 15 is multiple, multiple first air distribution hole 15 along the length direction and height direction of the baffle 13 evenly arrayed. The number of the second air distribution hole 18 is multiple, multiple second air distribution hole 18 along the outer peripheral surface direction and height direction of the furnace ring 9 evenly arrayed. So that the air flow via the distribution of the first air distribution hole 15, evenly into the main combustion chamber 4 inside, the main combustion chamber 4 inside each place produces uniform combustion effect; make the high temperature combustion-supporting gas flow sent into the second air distribution chamber 17 inside via the combustion-supporting air pipe 11, after the second air distribution hole 18 evenly distributed, evenly from each direction inside into the inside of the auxiliary combustion chamber 12, to the auxiliary combustion chamber 12 inside each place produces uniform combustion effect.

[0041] In addition, the fuel stove further comprises an ash discharging device 28, the ash discharging device 28 comprises a foot plate 29, the foot plate 29 is fixedly connected with the furnace box 1, the lower end of the second furnace barrel 8 is flush with the surface of the foot plate 29, the upper end of the second furnace barrel 8 is fixedly connected with a furnace plate 30, and the relative height difference between the furnace plate 30 and the upper end surface of the first furnace barrel 2 is greater than zero. The ash discharging device 28 further comprises a barrel seat 31, a guide rail box 32, an ash box 33 and a support 34, the foot plate 29 is fixedly connected with the barrel seat 31, the barrel seat 31 is fixedly connected with the guide rail box 32, the ash box 33 is sleeved in the guide rail box 32, the ash box 33 is fixedly connected with a box cover 35, the box cover 35 is fixedly connected with the support 34, the surface of the support 34 is provided with a containing groove 36, and a handle 37 is hinged in the containing groove 36. According to the technical scheme of the utility model, after the ash box 33 is filled, since the surface of the handle 37 abuts against the surface of the box cover 35, it can prevent people nearby from touching the convex surface such as the handle 37 without attention, so as to avoid injury of people nearby.

[0042] Further, the first feeding pipe 20 and the second feeding pipe 21 are further fixedly connected together through an end connecting plate 39, and the first motor 22 and the second motor 23 are both installed on the surface of the end connecting plate 39. Thus, various components are highly integrated in the feeding device 19, so that the integration and modularization of the feeding device 19 are improved, and maintenance or replacement is facilitated.

[0043] In addition, the feeding device 19 further comprises an electronic ignition rod 40, one end of the electronic ignition rod 40 is screwed with the air bellow 10, the other end of the electronic ignition rod 40 extends into the main combustion chamber 4 through the air bellow 10, and the angle between the length direction of the electronic ignition rod 40 and the surface of the air bellow 10 is greater than zero. The electronic ignition rod 40 is further screwed with a locking nut 41, and preferably the angle between the length direction of the electronic ignition rod 40 and the surface of the air bellow 10 is 20-40°. According to the technical scheme of the utility model, when the locking nut 41 abuts against the surface of the air bellow 10, the relative position between the electronic ignition rod 40 and the air bellow 10 is kept stable, so that the electronic ignition rod 40 is prevented from falling off when the feeding device 19 is running or moving, and on the other hand, at the moment of ignition by the electronic ignition rod 40, the airflow from the first feeding pipe 20 blows the spark into the main combustion chamber 4, so that the fuel is quickly ignited.

[0044] Specifically, the first furnace cylinder 2 is further fixedly connected with a lower supporting ring 43, the lower end of the furnace ring 9 is placed on the surface of the lower supporting ring 43, and the upper end of the furnace ring 9 is sleeved in the upper cover ring 42, and the upper cover ring 42 covers the upper end edge of the first furnace cylinder 2. According to the technical scheme of the utility model, the internal space of the furnace ring 9 is arranged as a secondary combustion chamber, and since the fuel is fully combusted in the secondary combustion chamber, the surface temperature of the furnace ring 9 rapidly rises, the furnace ring 9 is easily damaged and needs to be replaced regularly. The furnace ring 9 is supported on the surface of the lower supporting ring 43, so that the furnace ring 9 is convenient to replace, and in addition, the combustion-supporting airflow from the combustion-supporting air pipe 11 enters the second air distribution chamber 17, and due to the blockage of the lower supporting ring 43, the combustion-supporting airflow cannot flow downward in a reverse direction, so that the fuel is prevented from being combusted for the second time in the middle section of the first furnace cylinder, and the local overheating of the middle section of the first furnace cylinder is also avoided, thereby effectively prolonging the service life of the first furnace cylinder.

[0045] In addition, the main combustion chamber 4 is further provided with a material guide plate 44, the left and right sides of the material guide plate 44 are respectively fixedly connected with the partition plate 13, one end of the material guide plate 44 is further fixedly connected with the lower edge of the inner wall of the furnace box 1, the other end of the material guide plate 44 and the inner wall of the furnace box 1 surround to form a dust discharging hole 45, and the dust discharging hole 45 is close to the upper edge of the inner wall of the furnace box 1. According to the technical scheme of the utility model, after the fuel is sent into the main combustion chamber 4 through the feeding device 19, the airflow from the left and right sides of the material guide plate 44 and the airflow from the first feeding pipe 20 make the solid granular fuel evenly spread along the surface of the material guide plate 44, so that the fuel can be fully combusted on the surface of the material guide plate 44 to release as much heat energy as possible, and the ash generated after combustion falls into the ash box 33 through the dust discharging hole 45 under the action of the airflow from the left and right sides of the material guide plate 44 and the airflow from the first feeding pipe 20.

[0046] Specifically, the surface of the guide plate 44 is also provided with a plurality of ash leakage holes 46. The plurality of ash leakage holes 46 are arranged on the surface of the guide plate 44 in a linear array. According to the technical scheme of the utility model, since the airflow also passes through the first feeding pipe 20 and is sent into the main combustion chamber 4, on the one hand, the airflow has a combustion-supporting effect on the solid fuel in the main combustion chamber 4, and on the other hand, the solid fuel is evenly spread along the surface of the guide plate 44, so that the solid fuel is fully combusted in an oxygen-containing environment in the initial stage, and the ash formed by the combustion is timely removed through the ash discharge hole 45 and the ash leakage hole 46, so that the ash does not affect the combustion effect.

Claims

1. A fuel fire, characterised in that: The application relates to a fuel stove, which comprises a furnace box (1), a first furnace cylinder (2) and a fireboard (3), the furnace box (1) is internally provided with a main combustion chamber (4), the surface of the furnace box (1) is provided with a fire hole (6), the fire hole (6) is arranged between the main combustion chamber (4) and the lower end of the first furnace cylinder (2), the upper end of the first furnace cylinder (2) extends upwards along the vertical direction, one side of the fireboard (3) is fixedly connected to the edge of the fire hole (6), the other side of the fireboard (3) is close to the central axis of the first furnace cylinder (2), and the inclination angle between the length direction of the fireboard (3) and the axial direction of the first furnace cylinder (2) is greater than zero.

2. A fuel-fired furnace as set forth in claim 1 wherein: The inclination angle between the length direction of the fireboard (3) and the axial direction of the first furnace cylinder (2) is 30-60 degrees.

3. A fuel-fired furnace as set forth in claim 1 wherein: The fire hole (6) is circular, and the length of the fireboard (3) is 25-50% of the inner diameter of the first furnace cylinder (2).

4. A fuel-fired furnace as set forth in any of claims 1 to 3 wherein: The fireboard (3) is a rectangular thin plate as a whole.

5. A fire as claimed in claim 1 wherein: The furnace box (1) is further fixedly connected with a furnace cover (7), and the lower end of the first furnace cylinder (2) is sleeved in the furnace cover (7).

6. A fire as claimed in claim 1 wherein: The fuel stove further comprises a second furnace cylinder (8), a furnace ring (9), an air bellow (10) and a combustion air pipe (11), the first furnace cylinder (2) is contained in the second furnace cylinder (8), the furnace ring (9) is contained in the upper end of the first furnace cylinder (2), the internal space of the furnace ring (9) serves as a secondary combustion chamber (12), the furnace box (1) is further provided with a pair of partitions (13), the main combustion chamber (4) is arranged between the pair of partitions (13), a first air distribution chamber (14) is formed around the partitions (13) and the inner wall of the furnace box (1), a plurality of first air distribution holes (15) are arranged on the surface of the partitions (13), the furnace box (1) is further fixedly connected with one side of the air bellow (10), the air bellow (10) is communicated with the first air distribution chamber (14), the other side of the air bellow (10) is fixedly connected with an air blower (16), a second air distribution chamber (17) is formed around the periphery of the furnace ring (9) and the inner wall of the first furnace cylinder (2), a second air distribution hole (18) is arranged on the surface of the furnace ring (9), the combustion air pipe (11) is arranged between the first furnace cylinder (2) and the second furnace cylinder (8), one end of the combustion air pipe (11) is communicated with the second air distribution chamber (17), and the other end of the combustion air pipe (11) is communicated with the air bellow (10).

7. A fuel-fired furnace as set forth in claim 6 wherein: The length direction of the combustion air pipe (11) is parallel to the axial direction of the first furnace cylinder (2), and the spacing between the combustion air pipe (11) and the first furnace cylinder (2) is less than one fourth of the inner diameter of the first furnace cylinder (2).

8. A fuel-fired furnace as set forth in claim 6 wherein: The fuel stove further comprises a feeding device (19), the feeding device (19) comprises a first feeding pipe (20) and a second feeding pipe (21), the first feeding pipe (20) penetrates through the air bellow (10), one end of the first feeding pipe (20) is provided with a first motor (22), the other end of the first feeding pipe (20) is communicated with the main combustion chamber (4), one end of the second feeding pipe (21) is provided with a second motor (23) and is provided with a feeding port (24), the other end of the second feeding pipe (21) is communicated with the first feeding pipe (20), the output shaft of the first motor (22) is further fixedly connected with a first auger (25), the output shaft of the second motor (23) is further fixedly connected with a second auger (26).

9. A fuel-fired furnace as set forth in claim 8 wherein: The surface of the first feeding pipe (20) is further provided with a ventilation hole (27), and the ventilation hole (27) is accommodated in the air bellow (10).

10. A fuel-fired furnace as set forth in claim 6, characterized in that: The fuel stove further comprises an ash discharging device (28), the ash discharging device (28) comprises a foot pedal (29), the foot pedal (29) is fixedly connected with the stove box (1), the lower end of the second stove cylinder (8) is flush with the surface of the foot pedal (29), the upper end of the second stove cylinder (8) is fixedly connected with a stove disc (30), and the relative height difference between the stove disc (30) and the upper end surface of the first stove cylinder (2) is greater than zero.

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