Commercial catering energy-saving environment-friendly particle furnace

Abstract

The utility model provides an energy-saving and environment-friendly particle furnace for commercial catering. The energy-saving and environment-friendly particle furnace comprises a bottom box, a furnace body, a furnace core, an igniter and a smoke exhaust pipe, the furnace body is fixed at the top of the bottom box; the furnace core is sleeved with the furnace body and fixedly connected with the top of the bottom box. The igniter is mounted on the furnace body; the smoke exhaust pipe is arranged on the outer side of the furnace body; the furnace further comprises a top plate, a furnace bridge, a feeding groove, a transfer pipe and a fan. The top plate completely blocks the top opening of the furnace body and the furnace core; the furnace bridge is arranged at the bottom of the inner side of the furnace core and composed of a plurality of hollow guide pipes, a hollow support is fixed to each hollow guide pipe, and a plurality of exhaust holes are formed in the hollow supports. The feed chute is obliquely fixed on the furnace body; the transfer pipe is fixed to the outer side of the furnace core and communicates with all the hollow guide pipes. The fan is installed outside the furnace body, and the exhaust end of the fan is communicated with the transfer pipe. According to the utility model, the dust pollution problem is effectively solved, the catering sanitation requirement is met, the heat efficiency is obviously improved, the energy utilization is diversified, the high integration and automatic control are adopted, and the maintenance convenience and safety are high.

Description

Technical Field

[0001] This utility model relates to the field of biomass stove technology, specifically to a commercial catering energy-saving and environmentally friendly pellet stove. Background Technology

[0002] Biomass energy, as a renewable and clean energy source, is receiving increasing attention for its development and utilization. Biomass combustion furnaces, as one of the main devices for biomass energy utilization, have been widely used in heating, power generation, and other fields. However, applying biomass combustion furnaces to restaurant kitchens faces significant challenges. Restaurant kitchens have extremely high requirements for the cleanliness of the cooking environment and need to strictly ensure food hygiene. However, existing biomass combustion furnaces generally suffer from a key drawback during operation: they easily generate a large amount of dust, fly ash, or particulate matter during combustion. These particles can escape into the surrounding environment, polluting the kitchen operating space. During cooking, the dispersed dust easily adheres to food ingredients, utensils, and the surface of cooked dishes, directly contaminating the food and seriously violating hygiene standards in the catering industry. This not only affects the quality and appearance of the dishes but also poses food safety risks. Precisely because the aforementioned dust pollution problem is difficult to effectively solve, specialized biomass combustion furnaces suitable for restaurant kitchens are still relatively rare, limiting the promotion and application of biomass clean energy in this field.

[0003] Therefore, there is an urgent need to develop a new type of biomass combustion furnace that can effectively control dust generation and diffusion and meet the high hygiene requirements of catering kitchens. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a commercial catering energy-saving and environmentally friendly pellet oven that can effectively control dust generation and diffusion and effectively meet the high hygiene requirements of catering kitchens.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A commercial energy-saving and environmentally friendly pellet stove for catering includes a bottom box, a furnace body, a furnace core, an igniter, and a flue pipe. The bottom box is hollow and contains a drawer-type ash box with an ash discharge port at the top. The furnace body is a cylindrical body fixed to the top of the bottom box and open at both ends. The furnace core is a cylindrical body fitted inside the furnace body and open at both ends, with its bottom fixedly connected to the top of the bottom box. The inner wall of the furnace core is aligned vertically with the inner wall of the ash discharge port. The igniter is mounted on the furnace body, with its ignition end extending into the furnace core above the furnace bridge. The flue pipe is located on the outside of the furnace body, with its lower end connected to the upper part of the inner side of the furnace core. The stove also includes a top plate, a furnace bridge, a feed chute, a transfer pipe, and a fan. The top plate is a heat-conducting plate that completely seals the top opening of the furnace body and the top opening of the furnace core; the furnace bridge is located at the bottom of the inner side of the furnace core and directly above the ash discharge port. The furnace bridge is composed of several parallel hollow tubes with gaps between them. Several hollow supports communicating with the interior of the hollow tubes are fixed on each hollow tube, and several exhaust holes are provided on the hollow supports; the feed chute is inclined and fixed on the furnace body, with its lower end penetrating the furnace body and the furnace core and extending into the interior of the furnace core, and its upper end located outside the furnace body; the transfer pipe is a hollow tube fixed on the outside of the furnace core and communicating with all the hollow tubes; the fan is installed on the outside of the furnace body and its exhaust end is connected to the transfer pipe.

[0007] In one structure of this utility model, the top plate is a flat plate, suitable for flat-bottomed pans.

[0008] In another structure of this utility model, the top plate is an arc-shaped plate with a concave top, which is suitable for an arc-bottomed pot.

[0009] Specifically, the equipment for fuel delivery is a screw conveyor, which is installed at an angle on the outside of the furnace body. Its discharge port is located at its upper end facing the furnace body and connecting with the upper end of the feed chute, while its feed port is located at its lower end facing away from the furnace body.

[0010] Furthermore, the aforementioned commercial catering energy-saving and environmentally friendly pellet stove also includes an outer casing, which is fixed to the rear side of the stove body. The casing is internally divided into three chambers by several partitions: an equipment chamber, a water storage chamber, and a fuel chamber. The equipment chamber is located at the bottom inner side of the outer casing, where the igniter, fan, and screw conveyor are all installed. Multiple air inlets communicating with the outside are provided on the side wall of the equipment chamber for air intake and heat dissipation. The water storage chamber is located on the upper inner side of the outer casing, near the stove body, and is used for water storage. A water outlet pipe with a valve is installed on the side wall of the water storage chamber facing the stove body. The fuel chamber is located on the upper inner side of the outer casing, facing away from the stove body. The lower end of the fuel chamber extends to and connects with the screw conveyor inlet, and is used to store biomass fuel pellets.

[0011] Furthermore, to fully utilize the heat, the aforementioned commercial catering energy-saving and environmentally friendly pellet furnace also includes a water inlet pipe and a spiral pipe; the water inlet pipe is installed inside the equipment cavity, with one end extending out of the equipment cavity to connect with an external water source, and an electric valve is installed on the water inlet pipe; the spiral pipe is set in the closed cavity between the furnace body and the furnace core, spiraling upwards around the outer wall of the furnace core, with its lower end extending out of the furnace body to connect with the other end of the water inlet pipe, and its upper end penetrating the furnace body to connect with the water storage cavity.

[0012] Furthermore, in order to monitor the liquid level in the water storage chamber in real time, a liquid level sensor is installed in the water storage chamber, and a pressure reducing valve is installed at the top of the water storage chamber.

[0013] Furthermore, to achieve automatic and remote control of each device, the aforementioned commercial catering energy-saving and environmentally friendly pellet oven also includes a PLC control system. The PLC control system includes a PLC controller, a wireless communication module, and a mobile communication terminal. The PLC controller and the wireless communication module are installed on the outer casing. The PLC controller is electrically connected to the igniter, fan, screw conveyor, electric valve, liquid level sensor, and wireless communication module, and can control the start or stop of the igniter, fan, screw conveyor, and electric valve, respectively. The wireless communication module is used to electrically connect to the mobile communication terminal, receive control commands remotely sent by the mobile communication terminal, and send control signals to the PLC controller. The PLC controller controls the operation of the fan, screw conveyor, or electric valve.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) Effectively solve the problem of dust pollution and meet the requirements of catering hygiene.

[0016] Top plate sealing design: The heat-conducting top plate completely seals the top of the furnace body, blocking the combustion chamber from the cooking space, fundamentally preventing dust and fly ash from escaping into the kitchen environment and avoiding contamination of food and cookware.

[0017] Dust-free air supply system: The furnace bridge is composed of a hollow duct with exhaust holes and a support. The airflow from the fan is evenly delivered to the furnace bridge through the transfer pipe. The airflow permeates the fuel layer under low pressure from the exhaust holes, replacing the traditional blower-type dust emission and greatly reducing fly ash generation.

[0018] Closed-loop fuel delivery: The screw conveyor is precisely connected to the feed trough, and the fuel goes directly from the sealed fuel chamber to the inside of the furnace core, completely preventing dust leakage.

[0019] (2) Thermal efficiency has been significantly improved and energy utilization has been diversified.

[0020] High-efficiency heat exchange design: The spiral tube is coiled around the outer wall of the furnace core to directly absorb the waste heat of high-temperature flue gas to heat the water flow; the heated water is transported to the water storage chamber to realize the recovery and utilization of heat energy (such as dishwashing and food defrosting).

[0021] The heat-conducting top plate has a dual function: it directly conducts heat as a support surface for cookware; the curved / flat structure adapts to different cookware, increases the heat contact area, and reduces heat loss.

[0022] (3) Highly integrated and automated control.

[0023] Multifunctional outer casing integration: The equipment cavity centrally houses the fan and screw conveyor, and the side wall air inlet serves both heat dissipation and combustion assistance; the fuel cavity is seamlessly connected to the conveyor feed inlet to achieve automatic fuel replenishment; the water storage cavity integrates a liquid level sensor and a pressure reducing valve to ensure water safety and capacity monitoring.

[0024] Intelligent control system: The PLC controller links the fan, screw conveyor, and electric valve to precisely regulate the combustion intensity and fuel supply; it connects to mobile terminals via a wireless communication module to support remote start / stop and parameter adjustment, adapting to the peak scheduling needs of the catering industry.

[0025] (4) Enhanced ease of maintenance and security.

[0026] Drawer-type ash box: Located inside the bottom box, aligned with the ash discharge port of the furnace core. The ash box can be pulled out to clean the accumulated ash and avoid clogging of the furnace cavity.

[0027] Safety protection design: The water storage chamber pressure reducing valve prevents pressure buildup; the equipment chamber has an independent compartment to isolate electrical equipment from fuel / water sources, reducing the risk of failure. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0030] Figure 2 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0031] The diagram shows: 1-bottom box, 2-furnace body, 3-furnace core, 4-igniter, 5-exhaust pipe, 6-top plate, 7-furnace bridge, 8-feed chute, 9-transfer pipe, 10-fan, 11-screw conveyor, 12-hollow duct, 13-hollow support, 14-outer box, 15-equipment cavity, 16-water storage cavity, 17-fuel cavity, 18-water inlet pipe, 19-screw pipe, 20-electric valve, 21-pressure reducing valve, 22-ash box, 23-ash discharge port. Detailed Implementation

[0032] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. The described embodiments are merely some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Example 1

[0035] like Figure 1 As shown, this embodiment provides a commercial catering energy-saving and environmentally friendly pellet stove, including a bottom box 1, a furnace body 2, a furnace core 3, an igniter 4, a flue pipe 5, a top plate 6, a furnace bridge 7, a feeding trough 8, a transfer pipe 9, a fan 10, and a screw conveyor 11.

[0036] The bottom box 1 is hollow inside and can be square or round. A drawer-type ash box 22 is provided inside the bottom box 1, and an ash discharge port 23 is provided on the top of the ash box 22. When cleaning ash, the ash box 22 can be pulled out to clean the accumulated ash and avoid blockage of the furnace cavity.

[0037] The furnace body 2 is a cylindrical body fixed to the top of the bottom box 1 and open at the top and bottom (located outside the ash discharge port 23). The furnace body 2 can be square or round, and a heat insulation layer is provided on the inner wall of the furnace body 2.

[0038] The furnace core 3 is a cylindrical body that is fitted inside the furnace body 2 and has openings at the top and bottom. The furnace core 3 can be square or round. The top of the furnace core 3 is turned outward and fixed to the inner wall of the furnace body 2 to seal the top of the annular cavity between the furnace body 2 and the furnace core 3. The bottom of the furnace core 3 is fixedly connected to the top of the bottom box 1, and the inner wall of the furnace core 3 is aligned vertically with the inner wall of the ash discharge port 23, so that the ash accumulated in the furnace core 3 can fall from the ash discharge port 23 into the ash box 22 and be collected by the ash box 22.

[0039] The exhaust pipe 5 is vertically installed on the outside of the furnace body 2. The lower end of the exhaust pipe 5 penetrates the outer wall of the furnace body 2 and extends into the furnace core 3, communicating with the upper part of the inner side of the furnace core 3. The upper end of the exhaust pipe 5 extends out of the kitchen.

[0040] The igniter 4 is installed on the furnace body 2. The ignition end of the igniter 4 penetrates the furnace body 2 and the furnace core 3 and extends into the furnace bridge 7 inside the furnace core 3. A conventional igniter is used.

[0041] The top plate 6 is a high-temperature resistant heat-conducting plate that completely seals the opening at the top of the furnace body 2 and the opening at the top of the furnace core 3. The top plate 6 is a flat plate and is suitable for flat-bottomed cookware.

[0042] The furnace bridge 7 is located at the bottom of the inner side of the furnace core and directly above the ash discharge port 23. The furnace bridge 7 is composed of several parallel hollow tubes 12 with gaps between them. Several hollow supports 13 that communicate with the inside of the hollow tube 12 are fixed on each hollow tube 12. Several exhaust holes are provided on the hollow supports 13. The hollow supports 13 are Y-shaped or X-shaped. The plane of the hollow supports 13 intersects the plane of the hollow tubes 12. At the same time, the hollow supports 13 on two adjacent hollow tubes 12 are also staggered. One of the branches at the top of the hollow support 13 on each hollow tube 12 extends to the top of the adjacent hollow tube 12. The ignition end of the igniter 4 extends into the upper part of the hollow support 13.

[0043] The feed trough 8 is fixed at an incline to the furnace body 2, with its lower end penetrating the furnace body 2 and the furnace core 3 and extending into the furnace core 3, while its upper end is located outside the furnace body 2. To achieve airlock, an airlock plate is installed at the lower end of the feed trough 8. The airlock plate covers the lower opening of the feed trough 8 (and is located inside the hollow conduit 12). The upper end of the airlock plate is hinged to the top of the lower opening of the feed trough 8. The lower end of the airlock plate can be pushed open by the feed trough 8 when feeding (fuel), and when not feeding, it re-covers the lower opening of the feed trough 8 under its own weight.

[0044] The transfer pipe 9 is a hollow tube fixed to the outside of the furnace core 3 and connected to all the hollow conduits 12. The transfer pipe 9 is located in the cavity between the furnace body 2 and the furnace core 3.

[0045] The blower 10 is installed on the outside of the furnace body 2 and its exhaust end is connected to the transfer pipe 9.

[0046] The screw conveyor 11 (also known as an auger, a conventional device) is installed at an angle on the outside of the furnace body 2. Its discharge port is located at its upper end facing the furnace body 2, and its discharge port is connected to the upper end of the feed trough 8. The feed port of the screw conveyor 11 is located at its lower end facing away from the furnace body.

[0047] The operation steps are as follows:

[0048] In use, place the cookware on the top plate 6, and feed the biomass fuel into the screw conveyor 11 through the feed port. Driven by the screw of the screw conveyor 11, the fuel pellets are carried to the discharge port at the top of the screw conveyor 11. The biomass fuel pellets are then transported through the discharge port to the feed trough 8, and from there into the furnace core (during the transport process, the biomass fuel pellets push open the air lock plate, continuously entering the furnace core 3). Afterward, the biomass fuel pellets fall onto the hollow support 13. Start the blower 10, which blows air... Air is fed into the transfer pipe 9, and then splits from the transfer pipe 9 into each hollow duct 12, and then flows into the hollow support 13. Finally, it is discharged from the exhaust port of the hollow support 13 into the furnace core 3 to provide oxygen for combustion. Then, the igniter 4 is started to ignite the biomass fuel pellets. After the igniter 4 is turned off, the blower 10 continues to run and continuously supply air. The exhaust gas after the biomass fuel pellets are burned is discharged to the outside through the flue pipe 5. The heat generated by the combustion of biomass fuel pellets continuously heats the top plate 6, and the top plate 6 then transfers the heat to the cooking utensils on it to achieve heating. Example 2

[0049] The difference between this embodiment and Embodiment 1 is that...

[0050] like Figure 2 As shown, the top plate 6 is an arc-shaped plate with a concave top, suitable for cookware with an arc bottom. Example 3

[0051] To achieve high integration and facilitate equipment installation, as well as water and biomass fuel pellet storage, this embodiment adds the following structure based on embodiment 1 or 2.

[0052] The commercial catering energy-saving and environmentally friendly pellet furnace also includes an outer casing 14, which is fixed to the rear side of the furnace body 2. The interior of the outer casing 14 is divided into three chambers by several partitions: an equipment chamber 15, a water storage chamber 16, and a fuel chamber 17. The equipment chamber 15 is located at the bottom inside the outer casing 14. The igniter 4 (whose ignition end extends into the furnace bridge 7 inside the furnace core 3), the blower 10, and the screw conveyor 11 are all installed in the equipment chamber 15. At the same time, multiple air inlets communicating with the outside are provided on the side wall of the equipment chamber 15 for air intake and heat dissipation. The water storage chamber 16 is located on the upper part of the inner side of the outer casing 14, close to the furnace body, and is used for water storage. A water outlet pipe with a valve is installed on the side wall of the water storage chamber 16 facing the furnace body 2. The fuel chamber 17 is located on the upper part of the inner side of the outer casing 14, away from the furnace body 2. The lower end of the fuel chamber 17 extends to the feed inlet of the screw conveyor 11 and connects with the feed inlet of the screw conveyor 11 for storing biomass fuel pellets. The partitions and walls of the outer casing 14 (especially the partitions and outer walls of the water storage chamber 16) are all equipped with insulation layers. Example 4

[0053] To achieve heat energy recovery and utilization, the following structure is added to this embodiment based on embodiment 3.

[0054] The commercial catering energy-saving and environmentally friendly pellet furnace also includes a water inlet pipe 18 and a spiral pipe 19. The water inlet pipe 18 is installed inside the equipment cavity 15, with one end extending out of the equipment cavity 15 and connected to an external water source (urban tap water pipe, such as a water supply pipe from a water company). An electric valve 20 is installed on the water inlet pipe 18. The spiral pipe 19 is located in a closed cavity between the furnace body 2 and the furnace core 3. The spiral pipe 19 spirals upward around the outer wall of the furnace core 3, with its lower end (water inlet end) extending out of the furnace body 2 and connected to the other end of the water inlet pipe 18, and its upper end (water outlet end) penetrating the furnace body and connected to the water storage cavity 16. The spiral pipe 19 directly absorbs the waste heat of the high-temperature flue gas to heat the water flow. The heated hot water is then transported to the water storage cavity 16, realizing the recovery and utilization of heat energy (such as for dishwashing and food thawing). Example 5

[0055] To ensure water safety and capacity monitoring, this embodiment adds the following structure based on embodiment 4.

[0056] A liquid level sensor is installed inside the water storage chamber 16 to monitor the water level in the water storage chamber 16. At the same time, a pressure reducing valve 21 is installed on the top of the water storage chamber 16. Example 6

[0057] To achieve automated control, this embodiment adds the following structure based on embodiment 5.

[0058] The commercial catering energy-saving and environmentally friendly pellet oven also includes a PLC control system, which includes a PLC controller, a wireless communication module, and a mobile communication terminal. The PLC controller and the wireless communication module are installed on the outer casing 14. The PLC controller is electrically connected to the igniter 4, the fan 10, the screw conveyor 11, the electric valve 20, the liquid level sensor, and the wireless communication module, and can control the start or stop of the igniter 4, the fan 10, the screw conveyor 11, and the electric valve 20, respectively. The wireless communication module is used to electrically connect to the mobile communication terminal, receive control commands remotely sent by the mobile communication terminal, and send control signals to the PLC controller. The PLC controller controls the operation of the igniter 4, the fan 10, the screw conveyor 11, or the electric valve 20.

[0059] In the catering industry, preparation work in the kitchen requires starting very early each day, which severely impacts the sleep of kitchen staff. For example, soup needs to be cooked 1-2 hours before opening. Traditional stoves require staff to arrive in the kitchen 1-2 hours in advance. However, with the combustion furnace equipped with a PLC control system, as described in this application, the pot to be cooked only needs to be placed on the top plate 6 the day before. The next morning, without leaving home, staff can remotely issue commands via a mobile communication terminal. The wireless communication module receives the control commands remotely sent by the mobile communication terminal and sends the control signal to the PLC controller. The PLC controller controls the igniter 4, fan 10, and screw conveyor 11 to operate according to the steps of Example 1, automatically achieving the cooking process. The water level in the storage chamber 16 is automatically controlled. A critical water level value is set in the PLC controller. When the level sensor detects that the water level is below the set critical value, it sends a signal to the PLC controller. The PLC controller then controls the electric valve 20 to open, allowing water to be delivered into the storage chamber through the screw pipe 20.

[0060] Other aspects of this utility model that are not detailed herein are all conventional techniques known to those skilled in the art.

[0061] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0062] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A commercial catering energy-saving and environmentally friendly pellet stove, comprising a base box, a furnace body, a furnace core, an igniter, and a flue pipe; the base box is hollow and contains a drawer-type ash box with an ash discharge port at the top; the furnace body is a cylindrical body fixed to the top of the base box and open at both ends; the furnace core is a cylindrical body fitted inside the furnace body and open at both ends, with the bottom of the furnace core fixedly connected to the top of the base box, and the inner wall of the furnace core aligned vertically with the inner wall of the ash discharge port; the igniter is mounted on the furnace body, with its ignition end extending into the furnace core above the furnace bridge; the flue pipe is located on the outside of the furnace body, with its lower end connected to the upper part of the inner side of the furnace core; characterized in that: It also includes a top plate, a furnace bridge, a feed chute, a transfer pipe, and a blower; the top plate is a heat-conducting plate that completely seals the top opening of the furnace body and the top opening of the furnace core; the furnace bridge is located at the bottom of the inner side of the furnace core and directly above the ash discharge port. The furnace bridge is composed of several parallel hollow tubes with gaps between them. Several hollow supports communicating with the inside of the hollow tubes are fixed on each hollow tube, and several exhaust holes are provided on the hollow supports; the feed chute is fixedly at an incline on the furnace body, with its lower end penetrating the furnace body and the furnace core and extending into the furnace core, and its upper end located outside the furnace body; the transfer pipe is a hollow tube fixed on the outside of the furnace core and communicating with all the hollow tubes; the blower is installed on the outside of the furnace body and its exhaust end is connected to the transfer pipe.

2. The commercial catering energy-saving and environmentally friendly pellet stove according to claim 1, characterized in that: The top plate is a flat plate.

3. The commercial catering energy-saving and environmentally friendly pellet stove according to claim 1, characterized in that: The top plate is an arc-shaped plate with a concave top.

4. The commercial catering energy-saving and environmentally friendly pellet stove according to claim 1, characterized in that: An air lock plate is installed at the lower end of the feed trough, and the air lock plate covers the lower opening of the feed trough. The upper end of the air lock plate is hinged to the top of the lower opening of the feed trough.

5. The commercial catering energy-saving and environmentally friendly pellet stove according to claim 1, characterized in that: The inner wall of the furnace body is provided with a heat insulation layer.

6. The commercial catering energy-saving and environmentally friendly pellet stove according to any one of claims 1-5, characterized in that: It also includes a screw conveyor, which is installed at an angle on the outside of the furnace body. Its discharge port is located at its upper end facing one side of the furnace body and connecting with the upper end of the feed chute, and its feed port is located at its lower end facing away from the furnace body.

7. The commercial catering energy-saving and environmentally friendly pellet stove according to claim 6, characterized in that: It also includes an outer casing, which is fixed to the rear side of the furnace body. The interior of the outer casing is divided into three chambers by several partitions: an equipment chamber, a water storage chamber, and a fuel chamber. The equipment chamber is located at the bottom inside the outer casing, and the igniter, fan, and screw conveyor are all installed inside the equipment chamber. At the same time, multiple air inlets communicating with the outside are provided on the side wall of the equipment chamber for air intake and heat dissipation. The water storage chamber is located on the upper part of the inner casing, close to the furnace body, and is used for water storage. A water outlet pipe with a valve is installed on the side wall of the water storage chamber facing the furnace body. The fuel chamber is located on the upper part of the inner casing, facing away from the furnace body. The lower end of the fuel chamber extends to the feed inlet of the screw conveyor and connects with the feed inlet of the screw conveyor, and is used to store biomass fuel pellets.

8. The commercial catering energy-saving and environmentally friendly pellet stove according to claim 7, characterized in that: It also includes a water inlet pipe and a spiral pipe; the water inlet pipe is installed inside the equipment cavity, with one end extending out of the equipment cavity to connect with an external water source, and an electric valve is installed on the water inlet pipe; the spiral pipe is set in the closed cavity between the furnace body and the furnace core, the spiral pipe spirals upward around the outer wall of the furnace core, its lower end extends out of the furnace body to connect with the other end of the water inlet pipe, and its upper end penetrates the furnace body to connect with the water storage cavity.

9. The commercial catering energy-saving and environmentally friendly pellet stove according to claim 8, characterized in that: A liquid level sensor is installed inside the water storage chamber, and a pressure reducing valve is installed at the top of the water storage chamber.

10. The commercial catering energy-saving and environmentally friendly pellet stove according to claim 9, characterized in that: It also includes a PLC control system, which comprises a PLC controller, a wireless communication module, and a mobile communication terminal. The PLC controller and the wireless communication module are mounted on an outer casing. The PLC controller is electrically connected to the igniter, fan, screw conveyor, electric valve, level sensor, and wireless communication module, and can control the start or stop of the igniter, fan, screw conveyor, and electric valve, respectively. The wireless communication module is electrically connected to the mobile communication terminal to receive control commands remotely sent by the mobile communication terminal and send control signals to the PLC controller. The PLC controller controls the operation of the igniter, fan, screw conveyor, or electric valve.

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