Coal and firewood dual-purpose hot blast stove structure

Abstract

The utility model relates to the technical field of hot-blast stove heating, and discloses a coal and firewood dual-purpose hot-blast stove structure which comprises a shell, an inner container is fixedly connected to the interior of the shell, the front side and the rear side of the inner container are each fixedly connected with two air guide frames, and the front side and the rear side of the exterior of the inner container are each fixedly connected with a plurality of cooling fins. Two air inlet pipes are fixedly connected to the right side of the interior of the shell, a plurality of heat absorption plates are fixedly connected to the front side and the rear side of the interior of the inner container, a plurality of isolation columns are fixedly connected to the bottom side of the interior of the inner container, and an air supply assembly used for supplying air is arranged in the shell. Compared with a common stove, sufficient oxygen supply ensures complete combustion of coal or dry firewood, the smoke generation amount of incomplete combustion is greatly reduced, fuel waste is reduced, the use cost is reduced, pollution to the atmosphere is effectively reduced, efficient heating is achieved, and meanwhile good environmental protection benefits are achieved.

Description

Technical Field

[0001] This utility model relates to the field of hot air furnace heating technology, and in particular to a structure of a hot air furnace that can be used for both coal and firewood. Background Technology

[0002] A hot air furnace is a heat exchange device primarily used to heat air to a high temperature. In the combustion chamber, fuel (such as coal, natural gas, or oil) burns to produce high-temperature flue gas. This high-temperature flue gas transfers heat to the incoming cold air through a heat exchanger. The heat exchanger has a large heating surface area, enabling efficient heat transfer and rapidly warming the cold air into hot air. The air supply system is responsible for sending the cold air into the heat exchanger and then delivering the heated air to where it is needed.

[0003] Hot air stoves can quickly generate hot air, and in some rural areas, they can be combined with earthen kang (heated brick beds). For example, the flue pipe of some hot air stoves can be connected to the kang's heating hole. When the hot air stove is working, the flue gas enters the kang hole, and the heat from the flue gas helps to heat the kang. This is more convenient and efficient than the traditional method of directly burning fuel in the kang hole. It also allows for better temperature control and avoids problems such as dense smoke caused by incomplete fuel combustion.

[0004] However, some existing ordinary furnaces rely solely on their own metal shells for heat absorption and dissipation, resulting in low heat absorption and dissipation efficiency and low heat utilization rate, with most of the heat being lost with the smoke. In addition, the hot air path cannot be effectively controlled to reach the designated area. Therefore, in order to address the above shortcomings, a dual-fuel (coal and firewood) hot air furnace structure is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a coal and firewood dual-use hot air stove structure, which aims to improve the problems of low heat utilization rate, loss of most heat with smoke, and inability to effectively control the hot air path to reach the designated area in the existing hot air stove.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A coal and firewood dual-use hot air stove structure includes an outer shell, an inner liner fixedly connected inside the outer shell, two air guide frames fixedly connected to the front and rear sides of the inner liner, multiple heat dissipation fins fixedly connected to the front and rear sides of the outer shell, two air inlet pipes fixedly connected to the right side inside the outer shell, multiple heat absorption plates fixedly connected to the front and rear sides of the inner liner, multiple insulating columns fixedly connected to the bottom side inside the inner liner, an air supply assembly for air supply inside the outer shell, a fixed frame fixedly connected to the top left side of the outer shell, an air outlet pipe fixedly connected to the top of the fixed frame, a temperature sensor fixedly connected to the front side of the fixed frame, and a smoke outlet pipe fixedly connected to the left side inside the inner liner. A quick-release assembly for quick disassembly is provided inside the smoke outlet pipe.

[0008] As a further description of the above technical solution:

[0009] The quick-release assembly includes a fixed fan ring, which is slidably connected to the outside of the smoke outlet pipe. An activated carbon plate is fixedly connected to the bottom left side of the fixed fan ring, and a filter plate is fixedly connected to the bottom right side of the fixed fan ring. A handle is fixedly connected to the top of the fixed fan ring. Both front sides of the fixed fan ring are fixedly connected to docking plates. Rotating shafts are rotatably connected inside the two docking plates. A retaining plate is fixedly connected to the bottom of the two rotating shafts. A rotating plate is fixedly connected to the top of the two rotating shafts. Fixed plates are fixedly connected to the front and rear sides of the smoke outlet pipe. Sliding grooves and retaining slots are formed inside the two fixed plates.

[0010] As a further description of the above technical solution:

[0011] The air supply assembly includes a fan, the rear side of which is installed on the front side of the housing, and the output end of the fan is fixedly connected to an air supply pipe, the air supply pipe having multiple air outlet slots inside.

[0012] As a further description of the above technical solution:

[0013] A fuel inlet frame is fixedly connected to the outer right side of the outer shell, a long fuel door is slidably connected to the right side of the fuel inlet frame, an ash collection frame is slidably connected to the inner bottom side of the outer shell, a furnace cover is slidably connected to the top of the outer shell, and multiple air inlets are opened on the outer right side of the ash collection frame.

[0014] As a further description of the above technical solution:

[0015] The air duct is fixedly connected to the inside of the outer shell, and the ash collection frame is slidably connected to the inside of the inner liner.

[0016] As a further description of the above technical solution:

[0017] The temperature sensor is electrically connected to the fan, and the outside of the fuel inlet frame is fixedly connected to the inside of the inner liner;

[0018] As a further description of the above technical solution:

[0019] The activated carbon plate is slidably connected to the outside of the smoke outlet pipe, and the filter plate is slidably connected to the outside of the smoke outlet pipe.

[0020] As a further description of the above technical solution:

[0021] The bottom of the docking plate contacts the top of the fixing plate, and the outside of the card plate is slidably connected to the inside of the groove.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this invention, when the fan draws in outside air, the air flows along an S-shaped path, fully absorbing the heat transferred from the inner liner through the heat-absorbing plate, rapidly heating up to form high-temperature hot air, reducing the possibility of heat loss with smoke. Simultaneously, the air inlet pipes on both sides of the outer shell and the air inlet design of the furnace cover increase the amount of air entering, making fuel combustion more complete. Compared to ordinary stoves, the ample oxygen supply ensures complete combustion of coal or firewood, greatly reducing the amount of incompletely burned smoke and dust. This not only reduces fuel waste and operating costs but also effectively reduces air pollution, achieving good environmental benefits while providing efficient heating. Furthermore, a temperature sensor monitors the temperature of the air outlet duct in real time and feeds it back to the control system, precisely adjusting the start / stop and speed of the fan to ensure that only hot air is output, further improving indoor heating efficiency, optimizing energy utilization efficiency, and creating a warm, comfortable, energy-saving, and environmentally friendly environment for users.

[0024] 2. In this invention, activated carbon and filter plates effectively intercept larger particulate matter and harmful substances in the smoke, preventing them from being emitted into the external environment and effectively protecting air quality. The quick-release component design greatly facilitates user maintenance of the activated carbon plate and filter plate. When it is necessary to replace or clean the filter components, the user only needs to rotate the rotating plate to disengage the retaining plate from the slot and align it with the slide groove, then pull the handle to remove the fixing fan ring and filter components. The operation is simple and efficient, ensuring the long-term stable operation of the filtration system, allowing the hot air furnace to maintain good flue gas filtration capacity, providing users with a clean and healthy user experience, while reducing maintenance costs and difficulty, and extending the service life of the equipment. Attached Figure Description

[0025] Figure 1 This is a perspective view of the structure of a coal and firewood dual-use hot air stove proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the fixed frame structure of a coal and firewood dual-use hot blast stove proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the outer shell structure of a coal and firewood dual-use hot air stove proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the furnace cover structure of a dual-purpose coal and firewood hot blast stove proposed in this utility model;

[0029] Figure 5 This is a schematic diagram of the flue gas pipe structure of a dual-purpose coal and firewood hot blast stove proposed in this utility model;

[0030] Figure 6 This is a schematic diagram of the inner liner structure of a dual-purpose coal and firewood hot air stove proposed in this utility model;

[0031] Figure 7 This is a schematic diagram of the air supply pipe structure of a coal and firewood dual-purpose hot blast stove proposed in this utility model;

[0032] Figure 8 This is a schematic diagram of the fixed fan ring structure of a coal and firewood dual-use hot air stove proposed in this utility model;

[0033] Figure 9 for Figure 8 Enlarged view of point A in the middle;

[0034] Figure 10 This is a schematic diagram of the fixed plate structure of a coal and firewood dual-use hot air stove proposed in this utility model.

[0035] Legend:

[0036] 1. Outer shell; 2. Inner liner; 3. Air guide frame; 4. Heat sink; 5. Air inlet pipe; 6. Heat absorption plate; 7. Isolation column; 8. Fan; 9. Air duct; 10. Air outlet slot; 11. Fixing frame; 12. Air outlet pipe; 13. Temperature sensor; 14. Smoke outlet pipe; 15. Diesel feed frame; 16. Diesel feed door; 17. Ash collection frame; 18. Furnace cover; 19. Air inlet; 20. Fixing fan ring; 21. Activated carbon plate; 22. Filter plate; 23. Handle; 24. Connecting plate; 25. Rotating shaft; 26. Clamping plate; 27. Rotating plate; 28. Fixing plate; 29. ​​Slide groove; 30. Slot. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Reference Figures 1 to 3 This utility model provides an embodiment of a coal and firewood dual-use hot air stove structure, including an outer shell 1. The outer shell 1 serves as the external protective structure of the entire hot air stove and is made of a robust and high-temperature resistant metal material, possessing excellent sealing properties to effectively prevent heat loss and smoke leakage. An inner liner 2 is fixedly connected inside the outer shell 1, and the inner liner 2 withstands the high-temperature environment generated during the combustion of coal or firewood. An S-shaped channel is arranged between the outer shell 1 and the inner liner 2. The S-shaped channel lengthens the airflow path within the channel, increasing the contact time and area between the air and the inner liner 2 and the outer shell 1. During the airflow through the S-shaped channel, it can fully absorb the heat emitted by the inner liner 2, thereby rapidly raising the air temperature and forming high-temperature hot air. Two air guide frames 3 are fixedly connected to the front and rear sides of the inner liner 2. The air guide frames 3 guide the air to flow along a predetermined path, distributing it evenly around the inner liner 2, ensuring that all parts of the inner liner 2 can fully contact the air, achieving efficient heat transfer. Multiple heat sinks 4 are fixedly connected to the front and rear sides of the inner liner 2. When the inner liner 2 is heated, the heat is transferred to the heat sinks 4 through heat conduction. Due to the large contact area between the heat sinks 4 and the air, the heat can be quickly transferred to the surrounding air, raising the air temperature and creating a convection phenomenon of rising hot air, which accelerates the heat dissipation process. Two air inlets 5 are fixedly connected to the right side of the inner shell 1, allowing the incoming air to quickly participate in the heat exchange process.

[0039] Reference Figures 4 to 6Multiple heat-absorbing plates 6 are fixedly connected to both the front and rear sides of the inner liner 2. When coal or firewood burns in the inner liner 2, it generates a large amount of heat radiation and heat convection. The heat-absorbing plates 6 can quickly absorb this heat and transfer it to the inner liner 2, the heat sink 4, and the surrounding air through heat conduction. Multiple insulating columns 7 are fixedly connected to the bottom side of the inner liner 2. An air supply assembly for air supply is installed inside the outer shell 1. A fixing frame 11 is fixedly connected to the top left side of the outer shell 1. An air outlet pipe 12 is fixedly connected to the top of the fixing frame 11. The heat absorbed by the inner liner 2 is blown out of the air outlet pipe 12 by the fan 8. The fixing frame 11 serves to support and fix the air outlet pipe 12. The air outlet duct 12 is connected to the space requiring heating via a pipe, delivering hot air to the space. A temperature sensor 13 is fixedly connected to the front of the fixed frame 11, and the temperature sensor 13 is electrically connected to the fan 8. The temperature sensor 13 can monitor the air temperature near the air outlet duct 12 in real time and feed the temperature signal back to the control system. The control system adjusts the speed of the fan 8 or starts and stops it, thereby achieving precise control of the output temperature of the hot air furnace, meeting the hot air temperature needs of different users, and improving the intelligence and automation level of the hot air furnace. A smoke outlet duct 14 is fixedly connected to the left side of the inner liner 2. The smoke outlet duct 14 can promptly discharge the smoke generated by combustion outside the furnace, preventing smoke from accumulating inside the furnace and affecting the combustion effect and normal operation of the equipment. The smoke outlet duct 14 can lead to the kang (heated brick bed), and the heat carried away by the smoke during combustion can heat the kang. If there is no kang, it can be directly connected to the chimney. The smoke outlet duct 14 is equipped with a quick-release component for quick disassembly.

[0040] Reference Figures 8 to 10The quick-release assembly includes a fixed fan ring 20, which is externally slidably connected to the inside of the smoke outlet pipe 14. An activated carbon plate 21 is fixedly connected to the bottom left side of the fixed fan ring 20. When the smoke generated by combustion passes through the activated carbon plate 21, harmful gases, odors, and some small particles in the smoke are adsorbed by the pores on the surface of the activated carbon, thereby purifying the smoke. The activated carbon plate 21 is externally slidably connected to the inside of the smoke outlet pipe 14. A filter plate 22 is fixedly connected to the bottom right side of the fixed fan ring 20, and is externally slidably connected to the inside of the smoke outlet pipe 14. The filter plate 22 can intercept and filter larger particulate matter in the smoke, preventing these particulate matter from being discharged into the external environment with the smoke. A handle 23 is fixedly connected to the top of the fixed fan ring 20. A docking plate 24 is fixedly connected to both sides of the front of the fixed fan ring 20. A rotating shaft 25 is rotatably connected inside the two docking plates 24. When it is necessary to disassemble the activated carbon plate 21 and the filter plate 22, the user rotates the rotating plate 27, and the rotating shaft 25 rotates accordingly, so that the clamping plate 26 is disengaged from the clamping groove 30 and aligned with the sliding groove 29. At this time, the handle 23 can be pulled to remove the fixed fan ring 20. A clamping plate 26 is fixedly connected to the bottom of the two rotating shafts 25, and a rotating plate 27 is fixedly connected to the top of the two rotating shafts 25. Fixed plates 28 are fixedly connected to both the front and rear sides of the smoke outlet pipe 14. The bottom of the docking plate 24 contacts the top of the fixed plate 28. A sliding groove 29 is opened inside the two fixed plates 28. The sliding groove 29 is the channel for the clamping plate 26 to slide during disassembly. The external sliding connection of the card plate 26 is to the inside of the slide groove 29. The inside of each of the two fixing plates 28 is provided with a slot 30. The slot 30 is used to hold the card plate 26. The external sliding connection of the card plate 26 is to the inside of the slot 30. During installation, the fixing fan ring 20 is placed into the smoke outlet pipe 14, so that the card plate 26 is aligned with the slide groove 29 and inserted. Then, the rotating plate 27 is rotated to drive the card plate 26 into the slot 30, thus completing the fixed installation of the fixing fan ring 20.

[0041] Reference Figure 3 , Figure 5 and Figure 7 The air supply assembly includes a fan 8, which is mounted on the rear side of the outer casing 1. An air duct 9 is fixedly connected to the output end of the fan 8. The outer side of the air duct 9 is fixedly connected to the inside of the outer casing 1. Air outlet slots 10 allow air to impact the inner liner 2 and heat sink 4 at a certain angle, enhancing air turbulence and further improving heat transfer efficiency. Multiple air outlet slots 10 are provided inside the air duct 9. When the fan 8 starts, it draws outside air into the air duct 9 and evenly injects the air into the interior of the outer casing 1 through the multiple air outlet slots 10.

[0042] Reference Figure 1 and Figure 4A fuel inlet frame 15 is fixedly connected to the outer right side of the outer shell 1. The fuel inlet frame 15 provides a dedicated channel and storage space for adding fuel. The outer side of the fuel inlet frame 15 is fixedly connected to the inside of the inner liner 2. A long fuel door 16 is slidably connected to the right side of the fuel inlet frame 15. The long fuel door 16 can tightly close the opening of the fuel inlet frame 15 to prevent cold air from entering the furnace and affecting the combustion effect and heat loss. An ash collection frame 17 is slidably connected to the bottom inside the outer shell 1. The main function of the ash collection frame 17 is to collect the ash produced during combustion. The outer side of the ash collection frame 17 is slidably connected to the inside of the inner liner 2. A furnace cover 18 is slidably connected to the top of the outer shell 1. Multiple air inlets 19 are opened on the outer right side of the ash collection frame 17.

[0043] This hot air stove can be installed in the kitchen. The flue pipe 14 can pass through the kitchen wall to the heated kang (a traditional heated platform bed), and the air outlet pipe 12 connects to the room. Cookware can be placed on top of the stove, allowing cooking to be done on the stove while simultaneously heating the kang, and the hot air to heat the room. Alternatively, a radiator or geothermal water tank can be placed on top of the stove to heat the radiator or geothermal pipe.

[0044] Working Principle: When using this hot air furnace, first open the furnace cover 18 or the long firewood door 16, then add coal or firewood into the inner liner 2. As the coal or firewood burns, the heat will concentrate inside the inner liner 2. At this time, the heat can be absorbed by the heat absorption plate 6, and the heat can be transferred to the cavity between the heat sink 4, the outer shell 1, and the inner liner 2 through the heat absorption plate 6 and the inner liner 2. At this time, air flow can be added into the inner liner 2 through the air inlet pipe 5 and the furnace cover 18. Then, the outside air can be drawn into the air supply pipe 9 by the blower 8 and injected into the inner shell 1 through the air outlet slot 10. This heats the air inside the outer shell 1, and the hot air can be output to the outside through the air outlet pipe 12. The outside of the air outlet pipe 12 can be connected to a pipe to deliver the hot air to the required location. In this location, the smoke generated during combustion is discharged to the outside through the smoke outlet pipe 14. When the smoke is discharged, it passes through the filter plate 22 and the activated carbon plate 21, thereby achieving the filtration and purification of the smoke and protecting the air environment. When it is necessary to replace and clean the activated carbon plate 21 and the filter plate 22, simply rotate the rotating plate 27 to drive the clamping plate 26 to rotate inside the clamping groove 30. At this time, the clamping plate 26 will be aligned with the sliding groove 29. Then, pull the handle 23 to drive the fixed fan ring 20 to move, which will cause the clamping plate 26 to slide out of the sliding groove 29, so that the activated carbon plate 21 and the filter plate 22 can be removed from the inside of the smoke outlet pipe 14. When it is necessary to install the activated carbon plate 21 and the filter plate 22, simply reverse the above steps to install the activated carbon plate 21 and the filter plate 22.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coal and firewood dual-use hot air stove structure, comprising an outer shell (1), characterized in that: The inner shell (1) is fixedly connected to the inner liner (2). Two air guide frames (3) are fixedly connected to the front and rear sides of the inner liner (2). Multiple heat sinks (4) are fixedly connected to the front and rear sides of the outer shell (2). Two air inlet pipes (5) are fixedly connected to the right side of the inner shell (1). Multiple heat absorption plates (6) are fixedly connected to the front and rear sides of the inner liner (2). Multiple isolation columns (7) are fixedly connected to the bottom side of the inner liner (2). An air supply assembly for air supply is provided inside the outer shell (1). A fixed frame (11) is fixedly connected to the top left side of the outer shell (1). An air outlet pipe (12) is fixedly connected to the top of the fixed frame (11). A temperature sensor (13) is fixedly connected to the front side of the fixed frame (11). A smoke outlet pipe (14) is fixedly connected to the left side of the inner liner (2). A quick-release assembly for quick release is provided inside the smoke outlet pipe (14).

2. The structure of a dual-purpose coal and firewood hot blast stove according to claim 1, characterized in that: The quick-release assembly includes a fixed fan ring (20), which is slidably connected to the outside of the smoke outlet pipe (14). An activated carbon plate (21) is fixedly connected to the bottom left side of the fixed fan ring (20), and a filter plate (22) is fixedly connected to the bottom right side of the fixed fan ring (20). A handle (23) is fixedly connected to the top of the fixed fan ring (20). Both front sides of the fixed fan ring (20) are fixedly connected to docking plates (24). Rotating shafts (25) are rotatably connected inside the two docking plates (24). A retaining plate (26) is fixedly connected to the bottom of the two rotating shafts (25). A rotating plate (27) is fixedly connected to the top of the two rotating shafts (25). Fixed plates (28) are fixedly connected to the front and rear sides of the smoke outlet pipe (14). Sliding grooves (29) and retaining slots (30) are opened inside the two fixed plates (28).

3. The structure of a dual-purpose coal and firewood hot blast stove according to claim 1, characterized in that: The air supply assembly includes a fan (8), the rear side of which is installed on the front side of the housing (1). The output end of the fan (8) is fixedly connected to an air supply pipe (9), and the air supply pipe (9) has multiple air outlet slots (10) inside.

4. The structure of a dual-purpose coal and firewood hot blast stove according to claim 3, characterized in that: A fuel inlet frame (15) is fixedly connected to the outer right side of the outer shell (1), a long fuel door (16) is slidably connected to the right side of the fuel inlet frame (15), an ash collection frame (17) is slidably connected to the inner bottom side of the outer shell (1), a furnace cover (18) is slidably connected to the top of the outer shell (1), and multiple air inlets (19) are opened on the outer right side of the ash collection frame (17).

5. The structure of a dual-purpose coal and firewood hot blast stove according to claim 4, characterized in that: The external air duct (9) is fixedly connected to the inside of the outer shell (1), and the external dust collection frame (17) is slidably connected to the inside of the inner liner (2).

6. The structure of a dual-purpose coal and firewood hot blast stove according to claim 4, characterized in that: The temperature sensor (13) is electrically connected to the fan (8), and the external of the fuel inlet frame (15) is fixedly connected to the inside of the inner liner (2).

7. The structure of a dual-purpose coal and firewood hot blast stove according to claim 2, characterized in that: The activated carbon plate (21) is slidably connected to the outside of the smoke outlet pipe (14), and the filter plate (22) is slidably connected to the outside of the smoke outlet pipe (14).

8. The structure of a dual-purpose coal and firewood hot blast stove according to claim 2, characterized in that: The bottom of the docking plate (24) is in contact with the top of the fixing plate (28), the outside of the card plate (26) is slidably connected to the inside of the slide groove (29), and the outside of the card plate (26) is slidably connected to the inside of the card slot (30).

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