Integrated heating stove

Abstract

The utility model relates to a heating stove, in particular to an integrated heating stove, which comprises a particle combustion unit, a coal and firewood combustion unit and / or a heat exchange unit, and is different from the prior art in that a hopper module is placed on the rear side of the top surface of a stove body; most easily-damaged parts of the particle combustion unit, the coal and firewood combustion unit and / or the heat exchange unit in the furnace body can be exposed. Therefore, the maintenance convenience is obviously optimized, and the operation problem of narrow installation space is solved.

Description

Technical Field

[0001] This utility model relates to heating stoves, and more particularly to an integrated heating stove. Background Technology

[0002] In rural areas of northern China and villas on the outskirts of cities, heating stoves are essential for combating the harsh winter, and their performance directly impacts residents' quality of life. However, various types of heating stoves currently on the market, whether pellet stoves, coal-fired stoves, or other types, all suffer from numerous problems that fail to meet the specific needs of this particular scenario.

[0003] In rural areas and villas on the outskirts of cities in northern China, the area is often far from centralized heating networks, relying on independent boilers for heating. Regarding fuel replenishment, most boilers, due to their small size, require frequent refueling. For example, in the long northern winters, small household boilers may need to be refueled every few hours with biomass pellets, coal, or firewood, severely impacting usability and making it difficult to achieve continuous and stable heating over long periods. Users are forced to frequently leave their homes in cold weather to refuel, which is both inconvenient and poses safety hazards.

[0004] Ease of maintenance is also a major problem for users. In rural northern China and villas, heating boilers are typically installed in relatively cramped storage rooms or basements. When a boiler malfunctions, due to inadequate internal design, critical components are often installed in hard-to-reach locations. Repair personnel must disassemble numerous boiler components to troubleshoot and repair the problem. This not only significantly increases repair time and labor costs, but repeated disassembly and reassembly can easily damage the boiler's seals and internal wiring, shortening the equipment's lifespan. Furthermore, due to space constraints, the side covers of the boiler are difficult to open after installation, severely limiting the operating space for repair personnel, making even simple repairs extremely challenging.

[0005] Furthermore, there are significant differences in the architectural structure and heating system layout of different rural houses and villas on the outskirts of cities in northern China. Some older buildings are limited by the original pipe layout, and some villas have complicated pipe routes after personalized renovations. The outlet and return pipe positions and pipe diameters of common heating boilers are fixed, lacking flexibility and making it difficult to efficiently connect with existing heating pipes. This results in the entire heating system operating poorly and the heating effect being greatly reduced. Utility Model Content

[0006] To overcome the defects or one of the defects in the existing technology, the purpose of this utility model is to provide an integrated heating furnace, which adopts the following technical solution:

[0007] An integrated heating furnace includes a pellet combustion unit, a coal and wood combustion unit, and / or a heat exchange unit. Unlike existing technologies, a hopper module is placed on the rear side of the top surface of the furnace body. After removing the hopper module, most of the easily damaged parts of the pellet combustion unit, coal and wood combustion unit, and / or heat exchange unit inside the furnace body can be exposed.

[0008] Furthermore, the hopper module includes a side panel that forms a rectangle, a top plate covering the top of the side panel, a cover plate connected to the top plate in a hinged manner, a funnel composed of four inclined plates fixedly connected inside the side panel, and the lower outlet of the funnel connecting to the feed inlet of the pellet combustion unit; a flue sleeve penetrates the top plate and the funnel and is fixed to the two as a whole, the flue sleeve being used for the passage of the flue gap.

[0009] Furthermore, corner limiting plates are installed at the two rear corners of the top surface of the furnace body using screws. The corner limiting plates include a first limiting surface and a second limiting surface, which are orthogonal to each other. The first limiting surface abuts against the rear side of the furnace body and the rear side panel of the side panel, and the second limiting surface abuts against the left or right side panel of the side panel. The front side panel of the side panel is limited by the rear end face of the top decorative panel.

[0010] Furthermore, the pellet combustion unit includes a pellet combustion bed, a primary auger, a secondary auger, and a blower. The pellet combustion bed is fixed inside the furnace. The primary auger passes through the furnace body in a sealed manner, and its primary feed inlet is connected to the secondary discharge outlet of the secondary auger to transport pellet fuel to the pellet combustion bed. The secondary feed inlet of the secondary auger is connected to the discharge outlet of the hopper module to transport pellet fuel in the hopper module to the primary auger. The blower's air outlet passes through the furnace body in a sealed manner to deliver combustion air to the pellet combustion bed. The primary and secondary augers are driven by a shared drive device or are equipped with independent drive devices.

[0011] Furthermore, the primary auger is axial in the left-right direction, passing through the furnace body from the left side; the secondary auger is axial in the front-back direction, with its secondary feed inlet located near the rear end of the furnace body.

[0012] Furthermore, the heat exchange unit includes a sealed cavity enclosed by double-layer furnace walls, which is filled with water as the heat exchange medium. A left and right water outlet connector are respectively installed at the upper end of the sealed cavity, and a left and right water return connector are respectively installed at the bottom end. Users can select either the left or right water outlet connector as the water outlet and either the left or right water return connector as the water return outlet, depending on the actual installation conditions. Unused connectors are sealed with matching plugs. During boiler operation, the heat released from fuel combustion in the furnace is transferred to the water in the sealed cavity through heat conduction and radiation, raising the water temperature. The heated hot water circulates between the sealed cavity and the radiator via a pipeline system, relying on natural convection or driven by a circulating pump, achieving efficient heat transfer and heating.

[0013] Furthermore, the heat exchange unit also includes a flue gas channel located within a sealed cavity, which also serves as the inner layer of the double-layer furnace wall. The flue gas channel includes an upper right box, an upper left box, a lower right box, and a lower left box. The upper right box is connected to the upper rear of the furnace chamber. The upper right box is connected to the lower right box through multiple small heat dissipation pipes. The upper left box is connected to the lower right box through multiple small heat dissipation pipes. The upper left box is connected to the lower left box through at least one large heat dissipation pipe. The lower left box is directly or indirectly connected to the air inlet of the induced draft fan outside the outer layer of the double-layer furnace wall. The air outlet of the induced draft fan is directly or indirectly connected to the direct exhaust chimney or the kang (heated brick bed) opening.

[0014] Furthermore, the volume ratio of the upper right chamber to the upper left chamber is 2:3; the volume ratio of the lower left chamber to the lower right chamber is 1:4; the volume ratio of the upper right chamber to the lower right chamber is 1:2; the upper right chamber is connected to the lower right chamber through 6 small heat dissipation pipes with rounded square cross-sections, the upper left chamber is connected to the lower right chamber through 6 small heat dissipation pipes with rounded square cross-sections, and the upper left chamber is connected to the lower left chamber through 1 large heat dissipation pipe with rounded rectangular cross-sections, and the cross-sectional area of ​​the large heat dissipation pipe is 3:1 compared to the cross-sectional area of ​​the small heat dissipation pipe. The large heat dissipation pipe opens into the outer layer of the double-layer furnace wall, and its opening is connected to the air inlet of the induced draft fan.

[0015] Furthermore, the air outlet of the induced draft fan is connected to one interface of the three-way distributor, and the other two interfaces of the three-way distributor are respectively connected to the straight chimney and the kang hole; the push-pull rod that controls the distribution ratio of the straight chimney and the kang hole extends all the way out of the furnace body to the front end of the furnace body.

[0016] Furthermore, the upper right and upper left boxes have openings at the outer layer of the double-layer furnace wall and are detachably connected to the ash removal cover plate by screws.

[0017] The beneficial technical effects of this utility model are as follows:

[0018] Significantly improves maintenance convenience: With the top detachable hopper module design, most of the easily damaged parts of the pellet combustion unit, coal and wood combustion unit and / or heat exchange unit inside the furnace can be directly exposed after removal, without the need to disassemble a large number of furnace components, greatly shortening maintenance time and reducing labor costs. At the same time, it avoids damage to the furnace body's sealing and internal wiring caused by repeated disassembly, thus extending the service life of the equipment.

[0019] Solving the operational challenges of limited installation space: Designed for small installation environments such as rural areas, villa storage rooms, and basements, this system eliminates the need for side covers or complex side operation spaces. The top-open access control design effectively solves the problem of insufficient operating space for maintenance personnel, allowing even simple faults to be handled efficiently. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0022] Figure 3 This is a top-down view of the structure of this utility model after the hopper module has been removed.

[0023] Figure 4 This is a structural schematic diagram of the hopper module of this utility model.

[0024] Figure 5 This is a structural schematic diagram of the hopper module of this utility model from another perspective.

[0025] Figure 6 This is a structural schematic diagram of the corner limiting plate of this utility model.

[0026] Figure 7 This is a schematic diagram of the particle combustion unit of this utility model.

[0027] Figure 8 This is a schematic diagram of the structure of the heat exchange unit of this utility model.

[0028] Figure 9 This is a schematic diagram of the heat exchange unit of this utility model from another perspective, showing the structure of the hidden double-layer furnace wall outer layer. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0030] like Figure 1-9An integrated heating furnace is shown, including a pellet combustion unit 100 and a heat exchange unit 300. A hopper module 200 is placed on the rear side of the top surface of the furnace body. After removing the hopper module 200, most of the easily damaged parts of the pellet combustion unit 100, the coal and wood combustion unit and / or the heat exchange unit 300 inside the furnace body can be exposed.

[0031] Of course, like existing heating boilers, the top decorative panel 1 is installed on the front side of the top of the boiler body with screws. In order to increase the exposed area of ​​easily damaged parts, the top decorative panel 1 can be removed.

[0032] Furthermore, the width of the hopper module 200 can be the same as the width of the furnace body, and the height can be close to the height of the furnace body. This allows it to hold more pellet fuel, reduce the frequency of feeding, avoid users having to go out frequently in cold weather, and improve the convenience of use and the ability of the heating system to operate continuously and stably for a long time.

[0033] The working principle of the integrated heating boiler in this embodiment:

[0034] 1. Fuel supply and combustion: The hopper module 200 is placed on the rear side of the top surface of the furnace body. Pellet fuel falls directly into the pellet combustion unit 100 through the hopper module, where it is stably burned and continuously releases heat.

[0035] 2. Heat exchange and output: The heat generated by combustion is transferred to the heat exchange unit 300. The heat exchange unit transfers the heat to the heating system medium (such as water) through its internal structure. The heated medium is then transported through pipes to the terminal heat dissipation equipment (such as radiators and underfloor heating) to achieve indoor heating.

[0036] 3. Convenient maintenance design aids operation: During normal operation, the top decorative panel 1 (front side) and the hopper module 200 (rear side) cover the top of the furnace body, forming a complete sealed structure to ensure combustion efficiency and safety. When maintenance is required, only the top decorative panel 1 and the hopper module 200 need to be removed to directly expose most of the vulnerable parts of the pellet combustion unit 100 and the heat exchange unit 300 (such as burners, heat exchanger interfaces, control elements, etc.). There is no need to disassemble the complex furnace body structure. Under the premise of not affecting the installation stability of core components, rapid maintenance can be achieved, ensuring long-term efficient operation of the equipment.

[0037] This design integrates three major functions—fuel supply, heat conversion, and convenient maintenance—through a structure of "top-open maintenance + large-capacity fuel storage," ensuring the continuous and stable operation of the heating system while simplifying daily maintenance.

[0038] In another preferred embodiment, the hopper module 200 includes a side panel 201 forming a rectangle, a top plate 202 covering the top of the side panel 201, a cover plate 203 partially connected to the top plate 202 by a hinge connection, a funnel 204 composed of four inclined plates fixedly connected inside the side panel 201, and the lower outlet of the funnel 204 connected to the feed inlet of the pellet combustion unit 100; a smoke pipe sleeve 205 passes through the top plate 202 and the funnel 204 and is fixed to the two as a whole, and the smoke pipe sleeve 205 is used for the passage of the smoke pipe gap. The hopper module is enclosed by side panels to form a rectangle and has a hinged cover at the top, which allows users to easily open the cover to add pellet fuel into the hopper. The lower outlet of the hopper is connected to the feed inlet of the pellet combustion unit, ensuring that the fuel falls smoothly into the feed inlet and preventing spillage or blockage. The flue pipe sleeve runs through the top plate and the hopper and is fixed to both, providing a stable passage for the flue pipe. This ensures the stability of the flue pipe installation and facilitates the sealing connection between the flue pipe and the furnace body, improving the overall structural coordination.

[0039] In another preferred embodiment, corner limiting plates 206 are respectively installed at the two corners of the rear side of the top surface of the furnace body by means of screws. The corner limiting plate 206 includes a first limiting surface 2061 and a second limiting surface 2062. The first limiting surface 2061 and the second limiting surface 2062 are orthogonal to each other. The first limiting surface 2061 abuts against the rear side of the furnace body and the rear side panel of the side panel 201, and the second limiting surface 2062 abuts against the left side panel or the right side panel of the side panel 201. The front side panel of the side panel 201 is limited by the rear end surface of the top decorative plate 1. The corner limiting plate is installed with screws at the two rear corners of the top surface of the furnace body. Its first and second limiting surfaces, which are orthogonal to each other, abut against the rear side of the furnace body, the rear panel of the hopper side panel, and the left or right side panel, respectively. Together with the limiting effect of the top decorative plate on the front panel of the hopper, the position of the hopper module can be accurately fixed to prevent it from shifting on the top surface of the furnace body. This limiting structure makes the hopper module easy and stable to install. During maintenance, the internal components of the furnace can be quickly exposed simply by removing the hopper, without the need for complicated positioning adjustments, thus improving the efficiency of maintenance operations.

[0040] In another preferred embodiment, the pellet combustion unit 100 includes a pellet combustion bed 101, a primary auger 102, a secondary auger 103, and a blower 104. The pellet combustion bed 101 is fixed inside the furnace. The primary auger 102 passes through the furnace body in a sealed manner, and its primary feed port 105 is connected to the secondary discharge port 106 of the secondary auger 103 for conveying pellet fuel to the pellet combustion bed 101. The secondary feed port 107 of the secondary auger 103 is connected to the discharge port of the hopper module 200 for conveying pellet fuel in the hopper module 200 to the primary auger 102. The air outlet of the blower 104 passes through the furnace body in a sealed manner to deliver combustion air to the pellet combustion bed 101. The primary auger 102 and the secondary auger 103 are driven by a shared drive device or are equipped with independent drive devices. The hopper module and the pellet combustion unit are physically isolated by a sealed secondary auger inlet and a primary auger conveying structure. Pellet fuel in the hopper is metered and delivered to the combustion bed only through the sealed auger channel, preventing direct contact between the high-temperature flame or hot airflow in the combustion zone and the stored pellets. Simultaneously, the fixed connection structure between the flue pipe sheath and the hopper top plate and funnel employs a gap-through design. The heat from the flue pipe itself is buffered by the gap air layer, and the enclosure structure of the hopper side panels and top plate is made of high-temperature resistant insulation material, further blocking external heat transfer to the hopper interior. Structurally, this ensures that the pellets stored in the hopper are always in a low-temperature, safe environment, effectively preventing the risk of fuel ignition due to high temperatures. A blower delivers combustion air to the pellet combustion bed, promoting complete fuel combustion and improving thermal conversion efficiency. The primary and secondary augers are designed with either a shared drive unit or independent drive units. A shared drive simplifies the structure and saves space, while independent drives flexibly adapt to different fuel delivery rate requirements, enhancing the system's adaptability and reliability.

[0041] In another preferred embodiment, the primary auger 102 is axial in the left-right direction, passing through the furnace body sealed from the left side; the secondary auger 103 is axial in the front-back direction, with its secondary feed inlet 107 located near the rear end of the furnace body. The pellet combustion unit adopts a layout of the primary and secondary augers in the left-right and front-back directions. The feed inlet of the secondary auger is located near the rear end of the furnace body and connected to the hopper discharge port, which can efficiently transport the pellet fuel in the hopper to the primary auger, and then from the primary auger to the pellet combustion bed; the blower delivers combustion air to the combustion bed to ensure complete combustion of the fuel; the primary and secondary augers can share a drive unit or be equipped with independent drive units, taking into account both the flexibility of the drive and the compactness of the structure. This design is suitable for small installation spaces such as rural areas or villa storage rooms, ensuring the stable operation of the fuel delivery system.

[0042] In another preferred embodiment, the heat exchange unit 300 includes a sealed cavity surrounded by double-layer furnace walls. The sealed cavity is filled with water as the heat exchange medium. A left water outlet connector 301 and a right water outlet connector 302 are respectively provided at the upper end of the sealed cavity, and a left water return connector 303 and a right water return connector 304 are respectively provided at the bottom end. The user selects the left water outlet connector 301 or the right water outlet connector 302 as the water outlet and the left water return connector 303 or the right water return connector 304 as the water return outlet according to the actual installation conditions on site. Unused connectors are sealed with matching sealing parts. When the heating furnace is running, the heat released by the combustion of fuel in the furnace is transferred to the water in the sealed cavity through heat conduction and heat radiation, so that the water is heated. The heated hot water circulates between the sealed cavity and the radiator through the pipeline system by natural convection or driven by the circulation pump, so as to achieve efficient heat transfer and heating. The heat exchange unit has left and right water outlet connectors at the top and left and right water return connectors at the bottom of its sealed cavity. Users can choose any set of connectors as the water outlet and return port according to the on-site pipeline layout. Unused connectors are sealed with plugs, which solves the problem of fixed pipe positions and specifications in traditional heating furnaces and can flexibly adapt to the heating pipeline systems of different buildings. The heated hot water circulates between the sealed cavity and the radiator through natural convection or a circulating pump, achieving efficient heat transfer and meeting diverse heating needs.

[0043] In another preferred embodiment, the heat exchange unit 300 further includes a flue gas channel located within a sealed cavity that also serves as the inner layer of the double-layer furnace wall. The flue gas channel includes an upper right box 306, an upper left box 305, a lower right box 308, and a lower left box 307. The upper right box 306 communicates with the upper rear of the furnace chamber. The upper right box 306 is connected to the lower right box 308 via multiple small heat dissipation pipes 309. The upper left box 305 is connected to the lower right box 308 via multiple small heat dissipation pipes 309. The upper left box 305 is connected to the lower left box 307 via at least one large heat dissipation pipe 311. The lower left box 307 is directly or indirectly connected to the air inlet of the induced draft fan 310 outside the outer layer of the double-layer furnace wall. The air outlet of the induced draft fan 310 is directly or indirectly connected to a direct-exhaust chimney or a kang (heated brick bed) opening. The flue gas passage of the heat exchange unit is designed with interconnected upper right, upper left, lower right, and lower left boxes and multiple heat dissipation pipes. This allows the high-temperature flue gas generated by combustion in the furnace to flow sequentially through the upper right box → small heat dissipation pipe → lower right box, upper left box → small heat dissipation pipe → lower right box, upper left box → large heat dissipation pipe → lower left box. This extends the residence time of the flue gas in the sealed cavity, increases the contact area between the flue gas and the inner layer of the double-layer furnace wall (i.e., the heat exchange medium water), and significantly improves the heat transfer efficiency. At the same time, the induced draft fan drives the flue gas flow through negative pressure, ensuring that the exhaust process is stable and controllable.

[0044] In another preferred embodiment, the volume ratio of the upper right box 306 to the upper left box 305 is 2:3; the volume ratio of the lower left box 307 to the lower right box 308 is 1:4; the volume ratio of the upper right box 306 to the lower right box 308 is 1:2; the upper right box 306 is connected to the lower right box 308 via six small heat dissipation pipes 309 with rounded square cross-sections; the upper left box 305 is connected to the lower right box 308 via six small heat dissipation pipes 309 with rounded square cross-sections; the upper left box 305 is connected to the lower left box 307 via one large heat dissipation pipe 311 with rounded rectangular cross-sections, and the cross-sectional area ratio of the large heat dissipation pipe 311 to the small heat dissipation pipes 309 is 3:1; the large heat dissipation pipe 311 opens into the outer layer of the double-layer furnace wall, and its opening is connected to the air inlet of the induced draft fan 310. The design, with a volume ratio of 2:3 between the upper right and upper left chambers, 1:4 between the lower left and lower right chambers, and 1:2 between the upper right and lower right chambers, combined with the configuration of 6 small heat dissipation pipes (rounded square cross-sections) and 1 large heat dissipation pipe (rounded rectangular cross-section, with a cross-sectional area ratio of 3:1 to the smaller pipes), essentially optimizes the flow velocity and distribution of flue gas in different paths through the coordinated matching of volume and pipe parameters: the smaller volume of the upper right chamber (directly connected to the furnace outlet) can quickly receive high-temperature flue gas and disperse it to the larger volume of the lower right chamber through multiple small pipes, avoiding local flue gas stagnation; the larger volume of the upper left chamber (forming a 2:3 ratio with the upper right chamber) can buffer the subsequent flue gas volume and disperse it through 6 small pipes. A small pipe synchronously delivers the flue gas to the lower right chamber, balancing the flow rates of the two flue gas streams. Finally, a large heat dissipation pipe (with a larger cross-sectional area) concentrates the flue gas from the lower right chamber to the lower left chamber (with a smaller volume), forming a flow logic of "dispersed heat exchange first, then concentrated discharge" in conjunction with the induced draft fan, ensuring that the flue gas in each section can fully exchange heat with the water medium and maximize the heat utilization rate.

[0045] In another preferred embodiment, the outlet of the induced draft fan 310 is connected to one interface of the three-way distributor 312, and the other two interfaces of the three-way distributor 312 are connected to the direct exhaust chimney and the kang (heated brick bed) hole, respectively. The push-pull rod controlling the distribution ratio of the direct exhaust chimney and the kang hole extends through the furnace body to the front end of the furnace body. The design of connecting the induced draft fan outlet to the direct exhaust chimney and the kang hole via the three-way distributor allows for flexible adjustment of the exhaust ratio through the push-pull rod at the front end of the furnace body. This satisfies the direct exhaust needs of rural areas in northern China (such as in scenarios without a kang hole) and adapts to the special needs of traditional kang heating (such as utilizing the waste heat of flue gas through the kang hole), improving the compatibility of the heating furnace with different building exhaust conditions. This adjustable exhaust path design avoids the limitation of traditional equipment that can only exhaust smoke in a single way, expanding the product's applicable scenarios.

[0046] In another preferred embodiment, the upper right housing 306 and the upper left housing 305 open onto the outer layer of the double-layer furnace wall and are detachably connected to the ash removal cover 313 by screws. The ash removal covers at the upper ends of the upper right and upper left housings are detachably connected by screws, allowing for direct opening of the covers after long-term use to clean the accumulated ash (such as particulate matter and tar produced during combustion) inside the housings and heat dissipation pipes, preventing ash from clogging the pipes or adhering to the heat dissipation surface and reducing heat transfer efficiency. This design simplifies maintenance operations, allowing for flue gas passage cleaning without disassembling the complex furnace structure, ensuring the continuous and efficient operation of the heat exchange unit.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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. An integrated heating stove comprising a pellet combustion unit (100), a wood combustion unit and / or a heat exchange unit (300), characterized in that, The furnace body top rear side rests on the hopper module (200), after removing the hopper module (200), most of the easily damaged parts of the pellet combustion unit (100), coal combustion unit and / or heat exchange unit (300) in the furnace body can be exposed.

2. The integrated heating stove according to claim 1, wherein, The hopper module (200) includes a side panel (201) that forms a rectangle, a top plate (202) covers the top of the side panel (201), the top plate (202) is connected to the cover plate (203) by a hinge connection, the inside of the side panel (201) is fixedly connected to a funnel (204) composed of four inclined plates, the lower end outlet of the funnel (204) is connected to the inlet of the pellet combustion unit (100); the smoke pipe sheath (205) penetrates through the top plate (202) and the funnel (204), and is fixed as a whole with the two, the smoke pipe sheath (205) is used for the smoke pipe gap to pass through.

3. The integrated heating stove as claimed in claim 2, wherein, Two corner limiting plates (206) are installed at the two corners of the rear side of the top of the furnace body by means of screws, the corner limiting plate (206) includes a first limiting surface (2061) and a second limiting surface (2062), the first limiting surface (2061) and the second limiting surface (2062) are orthogonal to each other, wherein the first limiting surface (2061) abuts against the rear side of the furnace body and the rear side of the side panel (201), and the second limiting surface (2062) abuts against the left side panel or the right side panel of the side panel (201); the front side panel of the side panel (201) is limited by the rear end surface of the top decorative plate (1).

4. The integrated heating stove as set forth in claim 1, wherein The pellet combustion unit (100) includes a pellet combustion bed (101), a primary auger (102), a secondary auger (103) and a blower (104), the pellet combustion bed (101) is fixedly arranged in the hearth, the primary auger (102) penetrates through the furnace body, the primary inlet (105) of the primary auger (102) is connected to the secondary outlet (106) of the secondary auger (103), which is used for conveying the pellet fuel to the pellet combustion bed (101); the secondary inlet (107) of the secondary auger (103) is connected to the outlet of the hopper module (200), which is used for conveying the pellet fuel in the hopper module (200) to the primary auger (102); the air outlet of the blower (104) penetrates through the furnace body to the pellet combustion bed (101) to convey the combustion air, the primary auger (102) and the secondary auger (103) are driven by a common driving device or are respectively provided with independent driving devices.

5. The integrated heating stove as claimed in claim 4, wherein, The axial direction of the primary auger (102) is left-right direction, and the primary auger (102) penetrates through the furnace body from the left side of the furnace body; the axial direction of the secondary auger (103) is front-rear direction, and the secondary inlet (107) of the secondary auger (103) is close to the rear end of the furnace body.

6. The integrated heating stove of claim 1, wherein, The heat exchange unit (300) comprises a closed cavity surrounded by a double-layer furnace wall, which is filled with water as a heat exchange medium, and the closed cavity is provided with a left water outlet joint (301) and a right water outlet joint (302) at the upper end, and is provided with a left water return joint (303) and a right water return joint (304) at the bottom end; the user selects the left water outlet joint (301) or the right water outlet joint (302) as the water outlet according to the actual installation conditions, selects the left water return joint (303) or the right water return joint (304) as the water return, and the unused joint is sealed by a matched sealing member; when the heating furnace is running, the heat released by the fuel combustion in the hearth is transmitted to the water in the closed cavity by heat conduction and heat radiation, so that the water is heated, and the heated hot water flows in the closed cavity and the radiator through a pipeline system under the drive of a circulating pump, so that the heat is efficiently transmitted and heating is realized.

7. The integrated heating stove as claimed in claim 6, wherein The heat exchange unit (300) further comprises a flue gas passage located in the closed cavity and serving as an inner layer of the double-layer furnace wall, the flue gas passage comprises a right upper box (306), a left upper box (305), a right lower box (308) and a left lower box (307), the right upper box (306) is communicated with the upper rear of the hearth, the right upper box (306) is communicated with the right lower box (308) through a plurality of small heat dissipation pipelines (309), the left upper box (305) is communicated with the right lower box (308) through a plurality of small heat dissipation pipelines (309), the left upper box (305) is communicated with the left lower box (307) through at least one large heat dissipation pipeline (311), and the left lower box (307) is directly or indirectly communicated with the air inlet of an induced draft fan (310) outside the outer layer of the double-layer furnace wall, and the air outlet of the induced draft fan (310) is directly or indirectly communicated with a straight flue or a kang hole.

8. The integrated heating stove according to claim 7, wherein, The volume of the right upper box (306) to the volume of the left upper box (305) is 2:3; the volume of the left lower box (307) to the volume of the right lower box (308) is 1:4; the volume of the right upper box (306) to the volume of the right lower box (308) is 1:2; the right upper box (306) is communicated with the right lower box (308) through six small heat dissipation pipelines (309) with a circular corner square cross section, the left upper box (305) is communicated with the right lower box (308) through six small heat dissipation pipelines (309) with a circular corner square cross section, the left upper box (305) is communicated with the left lower box (307) through one large heat dissipation pipeline (311) with a circular corner rectangular cross section, and the cross-sectional area of the large heat dissipation pipeline (311) to the cross-sectional area of the small heat dissipation pipeline (309) is 3:1, and the large heat dissipation pipeline (311) is opened in the outer layer of the double-layer furnace wall, and the opening is communicated with the air inlet of the induced draft fan (310).

9. The integrated heating stove of claim 7, wherein, The air outlet of the induced draft fan (310) is communicated with one interface of a three-way distributor (312), the other two interfaces of the three-way distributor (312) are respectively communicated with the straight flue and the kang hole; a push-pull rod for controlling the distribution ratio of the straight flue and the kang hole extends in the furnace body to the front end of the furnace body.

10. The integrated heating stove of claim 7, wherein, The upper ends of the right upper box (306) and the left upper box (305) are opened to the outer layer of the double-layer furnace wall, and the ash removal cover plate (313) is detachably connected through screws.

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