Feeding combustion device and pellet furnace

Abstract

The utility model relates to a kind of feeding combustion device and pellet stove. Wherein feeding combustion device includes: fire tank, the fire tank is conical structure, the inner diameter of the conical structure gradually decreases from top to bottom;The sidewall of the fire tank is provided with feed inlet, the feed inlet is used to transport fuel to the inside of the fire tank;Ignition stick, one end of the ignition stick is inserted into the inside of the fire tank and is used to ignite the fuel at the bottom of the fire tank.The feeding combustion device and pellet stove provided by the utility model can shorten ignition time, reduce fuel waste and effectively reduce the risk of backfire.

Description

Technical Field

[0001] This utility model relates to the field of pellet furnace technology, and in particular to a feeding and combustion device and a pellet furnace. Background Technology

[0002] A pellet oven is a device that uses pellet fuel to cook food. The pellet fuel used is mostly biomass pellet fuel made from materials such as sawdust and straw. This material produces fewer pollutants when burned, making it more environmentally friendly than traditional fuels such as coal. It also heats up quickly and has high heating efficiency, and is widely used in civilian, industrial, and agricultural fields.

[0003] The design of the firebox structure of the pellet furnace directly affects the ignition efficiency and safety of use. Most existing pellet furnace fireboxes have a cylindrical structure, with the ignition rod and feed port located on the side of the firebox. When pellet fuel is fed into the firebox through the feed port, the fuel is dispersed throughout the bottom of the firebox under the action of gravity, and the contact area with the ignition rod is limited. In the initial ignition stage, more fuel needs to be added to ensure reliable ignition, which prolongs the ignition time. Utility Model Content

[0004] The first technical problem solved by this invention is to provide a feeding and combustion device that can effectively improve the ignition speed.

[0005] The second technical problem solved by this invention is to provide a pellet furnace that can effectively improve the ignition speed.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A feeding and combustion device, comprising:

[0008] The cupping jar has a conical structure, the inner diameter of which gradually decreases from top to bottom; the side wall of the cupping jar is provided with a feeding port;

[0009] An ignition rod, one end of which extends into the interior of the fire pot and is used to ignite the fuel at the bottom of the fire pot.

[0010] The beneficial effects of the feeding and combustion device described in this utility model compared with the prior art are as follows:

[0011] The fire pot of the above-mentioned feeding and combustion device has a conical structure, and the feed inlet is located on the side wall of the fire pot. The fuel entering can fall to the tip of the cone under the action of gravity, reducing the accumulation of fuel near the feed inlet. A small amount of fuel can make full contact with the ignition rod, which can reduce fuel waste and shorten the ignition time, thereby achieving efficient ignition.

[0012] In one embodiment, the ignition rod is disposed at the bottom of the bottom surface or the bottom of the side wall of the fire pot; and / or, the feed inlet is located at the top of the side wall of the fire pot.

[0013] In one embodiment, the ignition rod is positioned at the center of the bottom surface of the fire pot.

[0014] In one embodiment, it further includes:

[0015] The first fixing member is fixed to the bottom of the fire cup, and the first fixing member has a mounting hole, through which the ignition rod passes.

[0016] In one embodiment, an air supply assembly is further included, the air supply assembly comprising:

[0017] An air supply box is fitted over the fire cupping jar, and an annular air duct is formed between the inner wall of the air supply box and the outer wall of the fire cupping jar.

[0018] A blower motor is fixed to the bottom of the blower box, and the air outlet of the blower motor is connected to the annular air duct.

[0019] The annular air duct is connected to the interior of the fire pot.

[0020] In one embodiment, the top of the air supply box has an opening, the cupping jar is disposed in the opening, and the top of the cupping jar has a flange connected to the top of the air supply box.

[0021] In one embodiment, the side wall of the fire pot has multiple air guide holes and multiple air guide structures. The multiple air guide structures are arranged one-to-one with the multiple air guide holes. Each air guide structure has an air inlet channel, and each air inlet channel is connected to each air guide hole. The air inlet channel is used to introduce air into the fire pot. The air inlet direction of each air inlet channel is arranged clockwise or counterclockwise along the axis of the fire pot.

[0022] In one embodiment, any two adjacent air guide holes in the same circumferential direction are evenly spaced apart, and the angle between the axis of each air guide hole and the projection of the generatrix of the conical surface at the inlet point of each air guide hole onto the radial plane of the conical structure is the same.

[0023] In one embodiment, the air guiding structure includes air guiding plates, each of which is arranged clockwise or counterclockwise around the axis of the fire pot on the same side of the corresponding air guiding holes, and one end of each air guiding plate is connected to the inner wall of the fire pot, and the other end has a gap with the inner wall of the fire pot, the gap being used to form the air intake channel.

[0024] The second technical problem mentioned above is solved by the following technical solution:

[0025] A pellet furnace includes a feeding and combustion apparatus as described in any of the above embodiments.

[0026] The pellet furnace described in this utility model has the following advantages compared with the prior art:

[0027] When the above-mentioned pellet furnace is working, because the fire pot of the feeding and combustion device has a conical structure and the feed inlet is located on the side wall of the fire pot, the fuel entering can fall to the tip of the cone under the action of gravity, reducing the accumulation of fuel near the feed inlet. A small amount of fuel can fully contact the ignition rod, which can reduce fuel waste and shorten the ignition time, thereby achieving efficient ignition. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 An exploded view of the structure of a feeding and combustion device provided in an embodiment of this utility model;

[0030] Figure 2 This is a schematic diagram of the structure of a feeding and combustion device provided in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram showing the relative positions of the ignition rod and the feed inlet of a feeding and combustion device provided in an embodiment of the present invention.

[0032] Figure 4 This is a schematic diagram of the feeding process of a feeding combustion device provided in an embodiment of the present invention;

[0033] Figure 5 A top view of the fire pot of the feeding and combustion device provided in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the air guide groove and air guide plate of the feeding combustion device provided in an embodiment of the present invention;

[0035] Figure 7 for Figure 6 A magnified view of a section at point A in the middle;

[0036] Figure 8 This is a schematic diagram showing the position of the ignition rod in a feeding and combustion device according to an embodiment of the present invention.

[0037] Figure 9 A schematic diagram of the structure of the motor mounting bracket, the feeding mounting bracket, and the air supply box of the feeding combustion device provided in an embodiment of this utility model;

[0038] Figure 10 A schematic diagram of the motor mounting bracket and the feeding mounting bracket of the feeding combustion device provided in an embodiment of this utility model;

[0039] Figure 11 This is a schematic diagram of the air supply component of a feeding and combustion device provided in an embodiment of the present invention;

[0040] Figure 12 A schematic diagram showing the installation position of the blower motor in a feeding combustion device according to an embodiment of this utility model.

[0041] To make the above and other objects, features, advantages and embodiments of this utility model more apparent and understandable, the appended symbols are explained as follows:

[0042] 100. Fire cup; 110. Feed inlet; 120. Air guide hole; 130. Air guide plate; 140. Flanged edge; 141. Bolt hole; 150. Second fixing component; 160. Ignition rod mounting hole; 200. Ignition rod; 300. Air supply assembly; 310. Air supply box; 320. Air supply motor; 330. Third fixing component; 400. Feeding assembly; 410. Feeding motor; 420. Feeding pipe; 421. Feeding port; 430. Feeding screw; 440. Feeding pipe bracket; 450. Motor bracket; 451. Fourth fixing component; 510. First fixing component; 520. Fifth fixing component; 600. Pellet fuel; 700. Feeding position; 800. Combustion position. Detailed Implementation

[0043] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0044] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0049] Most existing pellet furnaces use a cylindrical structure for the fuel container, with the ignition rod installed on the side. This side-feeding method causes the pellet fuel to disperse at the bottom of the container, resulting in insufficient contact with the side-mounted ignition rod, slow ignition speed, and the flame center being too close to the feed inlet. The high-temperature flame can easily ignite the fuel in the feed pipe in reverse, leading to backfire. For solutions to these problems, please refer to [reference needed]. Figures 1 to 2 An embodiment of the present invention provides a feeding and combustion device, comprising:

[0050] Fire cupping 100, the fire cupping 100 has a conical structure, the inner diameter of the conical structure gradually decreases from top to bottom; the side wall of the fire cupping 100 is provided with a feed inlet 110, the feed inlet 110 is used to deliver fuel into the fire cupping 100;

[0051] Ignition rod 200, one end of which extends into the interior of the fire pot 100 and is used to ignite the fuel at the bottom of the fire pot 100.

[0052] The fire pot 100 provides combustion space for the fuel. When in operation, the axis of its conical structure is vertical or approximately vertical. The top of the fire pot 100, which is near the upper edge of the cone, is the end with the larger diameter of the cone. The bottom of the fire pot 100 is the end with the smaller diameter of the cone, or the tip of the cone. Figure 3-4 As shown, since the fire pot 100 has a conical structure, when fuel enters the fire pot 100 through the feed inlet 110 on the side wall of the fire pot 100, it will slide down the inclined surface under the action of gravity, reducing fuel accumulation near the feed inlet 110 and reducing the risk of backfire caused by the flame igniting the fuel at the feed inlet 110. The falling fuel is concentrated at the tip of the cone. Compared with the fuel being dispersed on the bottom surface of the cylindrical fire pot 100, the fuel distribution of the conical fire pot 100 is more concentrated. The ignition rod 200 can be quickly ignited by extending it to the position where the fuel is concentrated, resulting in high ignition efficiency. Compared with the structure of the cylindrical fire pot where both the feed inlet 110 and the ignition rod 200 are located on the side of the fire pot 100, the feed inlet 110 is farther away from the flame combustion position, thereby reducing the risk of backfire.

[0053] The fire pot 100 of the above-mentioned feeding and combustion device has a conical structure. The feed inlet 110 is located on the side wall of the fire pot 100. The fuel entering can fall to the tip of the cone under the action of gravity, reducing the accumulation of fuel near the feed inlet 110. A small amount of fuel can fully contact the ignition rod 200, which can reduce fuel waste and shorten the ignition time, thereby achieving efficient ignition.

[0054] In one embodiment, the ignition rod 200 is disposed at the bottom of the bottom surface or the bottom of the side wall of the fire pot 100; and / or, the feed inlet 110 is located at the top of the side wall of the fire pot 100. Here, the top and bottom of the side wall of the fire pot 100 refer to the top and bottom regions of the fire pot 100, rather than a specific location. The area within a certain range of vertical distance from the top surface of the fire pot 100 along its axial direction can be considered the top region of the fire pot 100, and the feed inlet 110 can be opened at any suitable location within this region. Similarly, the area within a certain range of vertical distance from the bottom surface of the fire pot 100 along its axial direction can be considered the bottom region of the fire pot 100, and the ignition rod 200 can be disposed at any suitable location within this region to ignite the fuel. Since the ignition rod 200 is located at the bottom of the fire pot 100, and the fuel is concentrated at the tip of the cone, when the ignition rod 200 ignites the fuel, the flame center is located at the bottom center of the fire pot 100, while the feed inlet 110 is located at the top of the side wall. Under the premise that the fire pot 100 and the feed inlet are at the same height, the flame center of the cone fire pot 100 is farther away from the feed inlet 110 than the flame center of the cylindrical fire pot, which can reduce the risk of backfire caused by the flame igniting the fuel near the feed inlet 110.

[0055] In one embodiment, the ignition rod 200 is positioned at the center of the bottom surface of the fire pot 100. Positioning the ignition rod 200 at the center of the bottom surface of the fire pot 100, compared to positioning it at other locations on the bottom surface or the bottom of the side wall, allows the ignition point to be further from the feed inlet 110, reducing the risk of backfire, facilitating easier contact between the ignition rod 200 and the fuel, thus increasing the ignition speed. Furthermore, this position reduces disturbance to the airflow within the fire pot 100, promoting a more uniform upward flow field within the fire pot 100. Figure 5-6 As shown, an ignition rod mounting hole 160 can be provided at the bottom of the fire pot 100, and the ignition rod 200 can be inserted into the fire pot 100 through the ignition rod mounting hole 160 to ignite the fuel.

[0056] In one embodiment, the feeding and combustion device further includes a first fixing member 510. The first fixing member 510 is fixed to the bottom of the fire pot 100, and has a mounting hole through which the ignition rod 200 passes. The first fixing member 510 is fixed to the bottom of the fire pot 100 and has a mounting hole, allowing the ignition rod 200 to penetrate the fire pot 100 and ignite the fuel. The mounting hole circumferentially limits the ignition rod 200, preventing it from swaying left and right and changing its ignition position.

[0057] In one embodiment, the first fixing member 510 is a fixing tube, welded and fixed to the center of the bottom of the fire pot 100; wherein, the ignition rod 200 passes through the fixing tube, and the two are fixedly connected by a fifth fixing member 520 passing through the fixing tube and the ignition rod. The fixing tube being welded to the center of the bottom of the fire pot 100 ensures that the ignition rod 200 is at the geometric center of the combustion zone, allowing the flame to spread evenly in all directions during ignition, avoiding localized fuel accumulation or incomplete ignition due to positional displacement, thereby improving combustion efficiency and stability, and preventing ignition failure due to displacement of the ignition rod 200. The fixing tube and the ignition rod 200 are in line or surface contact, which provides radial restraint for the ignition rod 200, preventing it from shaking or moving left or right. The fifth fixing member 520 prevents the ignition rod 200 from moving up and down, thus preventing the ignition rod 200 from falling off or shifting, ensuring the long-term stability of the ignition position. The fifth fixing member 520 can be a pin, bolt, etc.

[0058] In one embodiment, such as Figure 1-2 As shown, it also includes an air supply assembly, which includes: an air supply box, which is fitted over the fire cupping jar, and an annular air duct is formed between the inner wall of the air supply box and the outer wall of the fire cupping jar; and an air supply motor, which is fixed to the bottom of the air supply box, and the air outlet of the air supply motor is connected to the annular air duct; wherein the annular air duct is connected to the inside of the fire cupping jar. The air supply box 310 is designed to cooperate with the outer wall of the fire pot 100 to form an airflow channel for supplying air to the inside of the fire pot 100. The air supply motor 320 is positioned at the bottom of the air supply box 310, opposite to the fire pot 100. Through the annular air duct formed by the air supply box 310 and the outer wall of the fire pot 100, the air output by the air supply motor 320 can be evenly distributed along the circumference of the pot. The air in the annular air duct flows directionally into the fire pot 100 along the inclined angle of the guide groove, forming a spiral airflow, which can make combustion more complete. The air flowing through the outer wall of the fire pot 100 can also absorb the heat emitted by the outer wall of the fire pot 100, preheating it and thus improving the combustion speed and combustion temperature. The air supply box 310 is fitted onto the outside of the fire pot 100, making the structure of the air supply assembly 300 and the fire pot 100 more compact and saving space.

[0059] In one embodiment, such as Figure 1-6 As shown, the top of the air supply box has an opening, and the cupping jar is placed in the opening. The top of the cupping jar has a flange 140, which is connected to the top of the air supply box. The flange 140 refers to the annular structure formed by the upper edge of the cupping jar 100, which can be formed by bending, stamping, or welding. The flange 140 is connected to the top of the air supply box 310, either by welding or by fasteners. The flange 140 not only provides an installation base for bolts and other fasteners but also fits snugly against the upper surface of the air supply box 310, creating surface contact between the cupping jar 100 and the air supply box 310, improving the sealing of the annular air duct, and strengthening the overall structure. This structure facilitates alignment of the cupping jar 100 and the air supply box 310 during installation, has high integration, and bolt holes 141 can be provided on the flange 140 for fixing with standard bolts, making it more economical and reducing production costs.

[0060] In one exemplary embodiment, the air supply box 310 has a fan interface at its bottom, and the air supply motor 320 is fixedly connected to the fan interface via a third fastener 330. The fan interface at the bottom of the air supply box 310 provides a mounting base for the air supply motor 320, making it easier to position during installation. The bolt connection also facilitates maintenance and replacement should the fan malfunction, thereby improving production efficiency.

[0061] In one embodiment, such as Figure 5-8As shown, the side wall of the fire pot has multiple air guide holes 120 and multiple air guide structures. The multiple air guide structures are arranged one-to-one with the multiple air guide holes 120. The air guide structure is provided with an air inlet channel. Each air inlet channel is connected to each air guide hole 120. The air inlet channel is used to introduce air into the fire pot. The air inlet direction of each air inlet channel is arranged clockwise or counterclockwise along the axis of the fire pot. The air guide hole 120 is used to guide the air in the annular air duct into the fire pot 100, so that the fuel combustion is more complete. The air guide structure refers to the structure set on the wall of the fire pot to guide the airflow. Multiple air guide structures are set one-to-one with multiple air guide holes 120, meaning that each air guide hole 120 is set with a corresponding air guide structure, and the relative position of each air guide hole 120 and its corresponding air guide structure is the same. The air intake direction of each air intake channel is set clockwise or counterclockwise along the axis of the fire pot. This means that the projection of the air intake direction of each air intake channel on the radial plane of the fire pot is clockwise or counterclockwise. In this way, the air entering the fire pot along the air intake channel will form a rotating airflow. Under the upward trend of the heat flow itself, or by setting the air outlet direction of the air intake channel to be inclined upward, a spiral upward airflow can be formed inside the fire pot, which can efficiently remove the heat of the flame combustion, reduce the risk of fuel being ignited at the feed port, and thus effectively reduce the risk of backfire.

[0062] In one embodiment, such as Figure 5 As shown, the air guide holes 120 are evenly spaced in the same circumferential direction, and the angle between the axis of each air guide hole 120 and the projection of the generatrix of the conical surface of the inlet point of each air guide hole 120 onto the radial plane of the conical structure is the same. Figure 5 The dashed line represents the generatrix of the conical surface. Angles α1 and α2 are the angles between the air inlet direction of the two guide holes 120 along the same axial direction and the projection of the generatrix of the conical surface onto the radial plane of the conical structure, where angles α1 and α2 are equal in magnitude. The guide holes 120 are evenly spaced along the same circumference, and the angles between their axes and the projection of the generatrix of the conical surface onto the radial plane of the cone are the same. This ensures that multiple guide holes 120 of the same height are evenly distributed circumferentially on the reference plane, and that the air outlet direction forms the same angle with the conical surface. This guarantees that the airflow has a consistent incident angle on the same cross-section of the conical structure, improving the uniformity of the flow field inside the fire pot and avoiding problems such as localized overheating.

[0063] In one embodiment, the air guiding structure includes air guide plates 130. Each air guide plate 130 is arranged clockwise or counterclockwise around the axis of the fire pot on the same side of the corresponding air guide hole 120. One end of each air guide plate 130 is connected to the inner wall of the fire pot, and the other end has a gap with the inner wall of the fire pot, the gap forming the air intake channel. The fixed connection of one end of the air guide plate 130 to the inner wall of the fire pot 100 further guides the air entering the fire pot 100 through the air guide hole 120, further promoting the airflow to form a clockwise or counterclockwise vortex, thus improving the thermal efficiency of fuel combustion. If the flame position shifts upward due to fuel accumulation or other reasons, the air guide plate 130 can also act as a barrier, causing the flame to converge towards the center, thereby reducing the probability of backfire.

[0064] In one exemplary embodiment, such as Figure 1-2 As shown, the feeding and combustion device also includes a feeding assembly 400, which includes: a feeding motor 410; a feeding pipe 420 with a feeding port; and a feeding screw 430 passing through the feeding pipe 420. One end of the feeding screw 430 is connected to the output shaft of the feeding motor 410, and the other end extends to the feed inlet 110. Screw feeding improves the conveying efficiency of the pellet fuel 600 and reduces clogging.

[0065] In one exemplary embodiment, such as Figure 9-10 As shown, the feeding and combustion device also includes: a feeding pipe support 440, fixed to the outside of the fire pot 100, for supporting the feeding pipe 420; and a motor support 450, fixed to the side of the feeding pipe support 440 away from the fire pot 100, for fixing the feeding motor 410. The end of the feeding pipe 420 connected to the fire pot 100 has a bevel, which can be aligned with the inclination angle of the side wall of the fire pot 100. When the feeding pipe 420 is connected to the feeding port 110, the upper edge of the feeding pipe 100 will not obstruct the fuel from falling, thus allowing the fuel to fall more smoothly into the bottom of the fire pot 100 under gravity. The feeding pipe 420 and the motor are fixed by the support, allowing the feeding assembly 400 to be assembled into a single unit. During assembly, the feeding pipe 420 can be aligned with the feeding port 110 of the fire pot 100, reducing the overall weight and production cost. The feeding motor 410 and the motor bracket 450 can be connected by a fourth fastener 451, which can be a screw or the like.

[0066] In one exemplary embodiment, such as Figure 10-12As shown, with the air supply box 310 as the installation reference, the air supply motor 320 is connected to the bottom interface of the air supply box 310 via four screws. The air supply fan operates, supplying oxygen into the air supply box 310. The fire pot 100 and the ignition rod 200 mounting tube are welded together to ensure stability under continuous high temperatures. The ignition rod 200 is inserted into the fixing tube and secured with mounting screws to prevent it from falling off. Then, the fire pot 100 component is placed into the upper opening of the air supply box 310, and the two are fastened together using the second fixing member 150, which can be a bolt or a pin. The feeding pipe 420 is welded to the air supply box 310, and a screw is pushed into the feeding pipe 420. The feeding motor 410 is connected to the screw by mounting screws passing through the feeding pipe 420. The torque input from the feeding motor 410 drives the screw to rotate, pushing the wood pellet fuel 600 into the fire pot 100 for combustion.

[0067] In an exemplary embodiment, the air supply, feeding, and combustion processes of the fire pot 100 are as follows: Figure 8 As shown, the blower motor 320 operates, supplying oxygen into the air supply box 310, while simultaneously generating air pressure. The airflow enters the fire pot 100 through a total of 12 air guide holes 120 on the wall of the fire pot 100, as... Figure 3-5 As shown, a clockwise spiral airflow is formed inside the cupping jar 100.

[0068] Reference Figure 6-8During the feeding process, wood fuel pellets enter the feeding pipe 420 through the feeding port 421. The screw rotation pushes the pellets into the conical fire pot 100. Due to gravity, the pellets fall freely to the bottom of the fire pot 100 and come into contact with the heating element of the ignition rod 200. If the fire pot 100 is a traditional cylindrical shape and the ignition rod 200 is on the side, when the screw pushes the pellets into the fire pot 100, due to the large bottom area of ​​the cylindrical fire pot 100, the pellets fall and roll randomly. This results in a small portion of the initially pushed pellets not fully contacting the heating element of the ignition rod 200. Consequently, successful ignition may require more pellets and a longer time. Additionally, since the feeding port 421 is on one side of the fire pot 100, pellets tend to accumulate near the feeding port 421. Once ignition is successful, the main combustion zone of the particles will also be close to the feed port 421. At the same time, the heat of the flame will rise. Under high temperature conditions, if the feeding is suddenly stopped, it is very easy for the particles at the discharge port to ignite and burn back along the direction of the feed pipe 420 until the particle storage source space, resulting in a dangerous backfire phenomenon. In the conical fire cup 100 provided by this utility model, due to the conical guiding effect of the fire cup 100, the particles fall directly into the bottom of the fire cup 100 from the feeding position 700 under the action of gravity. The combustion area 800 will also be mainly concentrated at the bottom of the conical fire cup 100, ensuring that even when the number of particles is small, they can fully contact the heating part of the ignition rod 200, improving the ignition success rate and shortening the ignition time. It can also increase the distance between the concentrated combustion area of ​​the particles and the dropping port, ensuring that the concentrated combustion position of the particles is far away from the feeding port 421. At the same time, the air flow inside the fire cup 100 is guided by the air guide hole 120, which will generate a clockwise spiral upward airflow, which will carry the heat of the particle combustion out of the fire cup 100 in time, greatly reducing the risk of the particles being ignited at the feeding port 421, thereby avoiding the occurrence of backfire.

[0069] In one exemplary embodiment, a pellet furnace is provided, including a feeding and combustion apparatus as described in any of the embodiments above.

[0070] In the aforementioned pellet furnace, the incoming fuel can be concentrated and fall to the cone tip under the action of gravity, allowing a small amount of fuel to fully contact the ignition rod 200. This shortens the ignition time, reduces fuel waste, and minimizes fuel accumulation near the feed inlet 110. The feed inlet 110 is located on the side wall of the fire pot 100, and the fuel is concentrated at the cone tip of the fire pot 100. Compared to a design where both the feed inlet 110 and the ignition point are on the side, this design increases the distance between the feed inlet 110 and the flame center. The flame burns at the bottom of the cone structure, forming an upward airflow that can quickly direct heat, thereby effectively reducing the risk of backfire.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A feeding and combustion device, characterized in that, include: A cupping jar (100) has a conical structure, the inner diameter of which gradually decreases from top to bottom; the side wall of the cupping jar (100) is provided with a feed inlet (110). An ignition rod (200) has one end inserted into the interior of the fire pot (100) and is used to ignite the fuel at the bottom of the fire pot (100).

2. The feeding and combustion device according to claim 1, characterized in that, The ignition rod (200) is disposed on the bottom surface or the bottom of the side wall of the fire pot (100); and / or, the feed inlet (110) is located at the top of the side wall of the fire pot (100).

3. The feeding and combustion device according to claim 2, characterized in that, The ignition rod (200) is located at the center of the bottom surface of the fire pot (100).

4. The feeding and combustion device according to claim 2, characterized in that, Also includes: The first fixing member (510) is fixed to the bottom of the fire pot (100). The first fixing member (510) has an installation hole, and the ignition rod (200) passes through the installation hole.

5. The feeding and combustion device according to claim 1, characterized in that, It also includes an air supply assembly (300), the air supply assembly (300) comprising: An air supply box (310) is fitted over the fire cupping jar (100), and an annular air duct is formed between the inner wall of the air supply box (310) and the outer wall of the fire cupping jar (100). A blower motor (320) is fixed to the bottom of the air supply box (310), and the air outlet of the blower motor (320) is connected to the annular air duct. The annular air duct is connected to the interior of the fire pot.

6. The feeding and combustion device according to claim 5, characterized in that, The top of the air supply box (310) is provided with an opening, the fire cupping jar (100) is disposed in the opening, and the top of the fire cupping jar (100) is provided with a flange (140), which is connected to the top of the air supply box (310).

7. The feeding and combustion apparatus according to any one of claims 1 to 6, characterized in that, The fire cupping jar (100) has multiple air guide holes (120) on its side wall and multiple air guide structures on its side wall. The multiple air guide structures are arranged one-to-one with the multiple air guide holes (120). The air guide structure is provided with an air inlet channel. Each air inlet channel is connected to each air guide hole (120). The air inlet channel is used to introduce air into the fire cupping jar (100). The air inlet direction of each air inlet channel is arranged clockwise along the axis of the fire cupping jar (100) or counterclockwise along the axis of the fire cupping jar (100).

8. The feeding and combustion device according to claim 7, characterized in that, The air guide holes (120) are evenly spaced in the same circumferential direction, and the angle between the axis of each air guide hole (120) and the projection of the generatrix of the conical surface of the inlet point of each air guide hole (120) onto the radial plane of the conical structure is the same.

9. The feeding and combustion device according to claim 7, characterized in that, The air guiding structure includes air guide plates (130). Each air guide plate (130) is arranged on the same side of the corresponding air guide hole (120) in a clockwise direction or in a counterclockwise direction around the axis of the fire pot. One end of each air guide plate (130) is connected to the inner wall of the fire pot, and the other end has a gap with the inner wall of the fire pot (100). The gap is used to form the air inlet channel.

10. A pellet furnace, characterized in that, Includes the feeding and combustion apparatus as described in any one of claims 1-9.

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