Fireplace

Abstract

The utility model discloses a fireplace which comprises a fireplace body and a combustion bowl arranged at the bottom of the fireplace body, the combustion bowl comprises a bowl body with a through bottom and a bottom plate arranged at the bottom of the through position of the bowl body, a driving motor for driving the bottom plate to turn over is arranged outside the fireplace body, and a stock bin for supplying materials to the top of the combustion bowl is arranged on the rear side of the fireplace body. A hot air outlet and a plurality of heat exchange pipes communicated with the hot air outlet are arranged at the top of the furnace body, a first fan communicated with the heat exchange pipes is arranged below the granary, and hot smoke pipes communicated with the top of the furnace body are arranged on the two sides of the furnace body respectively. A second fan for pumping hot smoke in the furnace body to the outside of the furnace body through a hot smoke pipe is arranged below the stock bin, a heat exchange water tank is arranged on the outer side wall of the furnace body, the hot smoke pipe penetrates through the heat exchange water tank, and the heat exchange water tank is provided with a water inlet channel and a water outlet channel. The utility model aims to improve the ash removal effect, ensure the air circulation performance of the combustion bowl and improve the combustion efficiency of fuel.

Description

Technical Field

[0001] This utility model belongs to the field of heating technology, and in particular relates to a fireplace. Background Technology

[0002] Fireplaces are commonly used for indoor heating or decoration in homes. Their principle involves an ignition rod heating fuel pellets, causing the fuel to transition from smoldering to open flame. The heat generated by combustion heats the localized air, and the irregular airflow within the room achieves whole-house heating. However, because the fuel pellets continue to burn inside the combustion bowl, the resulting ash is difficult to separate from the bowl. Over time, the ash clumps together, affecting airflow at the bottom of the bowl and potentially causing fuel buildup and incomplete combustion. For example, Chinese patent CN109631087A discloses a real-flame fireplace. While a feeding device can gradually push the biomass pellets upwards from the combustion bowl, allowing the burnt-out ash to fall from the top, in practice, the ash often shatters during this upward pushing process and falls to the bottom of the bowl before reaching the outside. This significantly impacts ash removal and further affects fuel combustion. Utility Model Content

[0003] This invention provides a fireplace that improves ash removal, ensures air circulation in the combustion bowl, and enhances fuel combustion efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A fireplace includes a fireplace body and a combustion bowl disposed at the bottom of the fireplace body. The combustion bowl includes a bowl body extending through the bottom and a base plate disposed at the bottom of the bowl body extension. A drive motor is provided outside the fireplace body to rotate the base plate. A hopper for feeding material to the top of the combustion bowl is provided at the rear of the fireplace body. A hot air outlet and several heat exchange pipes connected to the hot air outlet are provided at the top of the fireplace body. A first fan connected to the heat exchange pipes is provided below the hopper. Hot flue pipes connected to the top of the fireplace body are provided on both sides of the fireplace body. A second fan for drawing hot flue gas from inside the fireplace body to the outside of the fireplace body through the hot flue pipes is provided below the hopper. A hot water exchange tank is provided on the outer wall of the fireplace body. The hot flue pipes pass through the hot water exchange tank. The hot water exchange tank has an inlet channel and an outlet channel. The base plate can be rotated relative to the bottom of the combustion bowl by a drive motor. When the fuel burns and generates heat in the combustion bowl, the drive motor can adjust the rotation speed and forward / reverse angle of the base plate to achieve small-amplitude reciprocating rotation. This facilitates the shaking and loosening of ash from the surface of the fuel particles, and also causes the ash in the combustion bowl to fall downwards. This improves the ash removal effect while preventing fuel particles from falling, thus effectively preventing ash accumulation in the combustion bowl and facilitating air contact with the surface of the fuel particles. At the same time, the rotation of the base plate also agitates the airflow, improving combustion efficiency. After the fuel has burned out and the flame has extinguished in the combustion bowl, the drive motor can completely flip the combustion bowl to thoroughly discharge the ash, thereby improving the convenience of ash removal. Due to the significant improvement in combustion efficiency, the residual heat from the combustion of fuel particles can be fully utilized by incorporating a hot water tank, further enhancing the thermal efficiency of the fireplace.

[0006] Preferably, the bottom of the base plate is provided with a rotating shaft that drives the drive motor. The rotating shaft is arranged along or nearly along a horizontal axis, and the base plate is symmetrical or approximately symmetrical on the left and right sides of the rotating shaft. When the base plate rotates to a small extent, the angles of the left and right sides of the base plate relative to the rotating shaft are consistent, which makes it easier to control the opening of the base plate to meet the dust cleaning requirements.

[0007] Preferably, the output end of the drive motor is equipped with a reducer, and the outside of the rotating shaft is equipped with a connecting sleeve. The output shaft of the reducer, the rotating shaft, and the connecting sleeve are fixed together by a connecting pin. The outside of the furnace body is equipped with a switch that acts on the connecting sleeve. The switch changes the positioning state of the output shaft and the rotating shaft by acting on the connecting sleeve. When the base plate does not need to rotate, the switch can position the connecting sleeve, so that the base plate can stably support the fuel particles.

[0008] Preferably, the bottom plate has a rotating pin on the side away from the drive motor, and the side wall of the bowl has a pin hole that rotatably engages with the rotating pin. The engagement of the rotating pin with the pin hole in the bowl improves the stability of the bottom plate's rotation and its support stability for fuel particles.

[0009] Preferably, the base plate has several downward-through bottom holes, a gap between the outer edge of the base plate and the side wall of the combustion bowl, and several grooves with openings facing the inside of the side wall of the combustion bowl along the outer edge of the base plate. The bottom holes facilitate the falling of ash and slag, and also facilitate the entry of air into the combustion bowl. The gaps and grooves facilitate the falling of ash and slag, and also facilitate the entry of air into the combustion bowl.

[0010] Preferably, the hot flue pipe is provided with cleaning rings spirally arranged along the pipe wall, and the top of the cleaning rings on the same side of the hot flue pipe is provided with a common connecting frame, and the connecting frame is provided with a pull rod. The ash and slag in the hot flue pipe can be removed by moving the cleaning rings up and down.

[0011] Preferably, the top of the furnace body is equipped with a guide block and a vertically movable cleaning plate. The pull rod is slidably connected to the guide block, and the upper end of the pull rod is fixedly connected to the cleaning plate. In this way, when the cleaning plate moves up and down, it drives all the cleaning rings to move synchronously, cleaning all the hot flue pipes at once, thus improving the cleaning efficiency.

[0012] Preferably, the hot water exchange tank is arranged around or at least around most of the outer wall of the furnace body, and the center of the combustion bowl is located on the side of the furnace body closer to the hot water exchange tank. In this way, the hot water exchange tank is in direct contact with the furnace body, maximizing the use of the furnace body temperature to heat the hot water exchange tank and ensuring full utilization of the heat from fuel particle combustion.

[0013] Preferably, a preheating zone is provided between the silo and the hot water tank, connecting the heat exchange tubes and the first fan. The airflow direction in the preheating zone is parallel to the airflow direction of the furnace body, and the heat exchange tubes are arranged horizontally above the furnace body. The air in the preheating zone is heated, which increases the temperature of the air before it enters the heat exchange tubes, thus improving the temperature of the hot air outlet. At the same time, the heat exchange zone forms an insulation area on the outside of the hot water tank and the furnace body, reducing heat loss.

[0014] Preferably, the furnace body has a bottom cavity communicating with the hot flue pipe, and the second fan has an extraction chamber communicating with the air inlet of the second fan. The extraction chamber is connected to the bottom cavity. In this way, the hot flue gas from the hot flue pipe settles in the bottom cavity before entering the second fan, which helps to reduce the dust content in the hot flue gas.

[0015] The beneficial effects of this utility model are: (1) Since the bottom plate and the bowl body of the combustion bowl are separate structures, the bottom plate can rotate relative to the bowl body, which makes it easy to discharge the ash and slag in the combustion bowl and reduce the difficulty of cleaning; (2) By driving the bottom plate with the drive motor, it is easy to realize the small-amplitude reciprocating rotation of the bottom plate, and the ash can be cleaned during the fuel combustion process without stopping the machine, which improves the convenience and flexibility of cleaning; (3) During the small-amplitude rotation of the bottom plate, the bowl body can maintain the constraint and positioning of the fuel, which effectively improves the stability of the cleaning process; (4) Timely and stable cleaning ensures the air flow so that the fuel particles can be fully burned, improving the combustion efficiency, making it possible to set up a hot water tank to make full use of the waste heat, thereby further improving the thermal efficiency of the fireplace. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 yes Figure 1 Sectional view at point AA;

[0018] Figure 3 yes Figure 2 Sectional view at point BB;

[0019] Figure 4 This is a schematic diagram of the combustion bowl structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the bottom of the combustion bowl of this utility model;

[0021] Figure 6 This is a cross-sectional view of the combustion bowl of this utility model;

[0022] Figure 7 yes Figure 6 Sectional view at point CC.

[0023] In the diagram: 1. Exhaust chamber; 2. Drive motor; 201. Shaft; 202. Bracket; 203. Connecting sleeve; 204. Reducer; 204a. Output shaft; 205. Switch; 205a. Actuating end; 3. Second fan; 4. Ignition rod; 5. First fan; 6. Feeding auger; 7. Feeding channel; 8. Hopper; 9. Hot water tank; 10. Preheating zone; 11. Heat exchanger pipe; 12. Hot air outlet; 13. Furnace body; 14. Combustion bowl; 141 bowl body; 141 side wall through hole. a, Pin hole 141b, Base plate 142, Tank body 142a, Rotating pin 142b, Bottom through hole 142c, Positioning groove 142d, Cover plate 143, Screw 144, Ash box 15, Hot smoke pipe 16, Ash cleaning ring 17, Bottom cavity 18, Pressure stabilizing water tank 19, Water outlet channel 20, Water inlet channel 21, Water pump 22, Connecting bracket 23, Guide block 24, Ash cleaning plate 25, Handle 25a, Pull rod 26, Connecting pin 27. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 , Figure 2 In the illustrated embodiment, a fireplace includes a furnace body 13 and a combustion bowl 14 disposed at the bottom of the furnace body 13. A hopper 8 is provided at the rear of the furnace body 13 to feed fuel to the top of the combustion bowl 14. Fuel particles in the hopper 8 are conveyed into the furnace body 13 via a feeding auger 6. The fuel particles can enter the combustion bowl 14 along a feeding channel 7. An ignition rod 4 is provided on one side of the combustion bowl 14 for heating the fuel particles. A hot air outlet 12 and several heat exchange pipes 11 connected to the hot air outlet 12 are provided at the top of the furnace body 13. The air inlet of a first fan 5 is connected to the outside, and the air outlet is connected to the heat exchange pipes 11. The first fan 5 is used to pressurize and deliver outside air to the heat exchange pipes 11. The furnace body 13 heats the heat exchange pipes 11, causing the air temperature inside the heat exchange pipes 11 to rise. The hot air is discharged from the hot air outlet 12, thereby increasing the indoor temperature through convection with the outside.

[0026] like Figure 1 , Figure 2 As shown, hot flue gas pipes 16 connected to the top of the furnace body 13 are respectively provided on both sides of the furnace body 13. A second fan 3 is provided below the hopper 8. The air inlet of the second fan 3 is connected to the hot flue gas pipe 16, and the air outlet is connected to the exhaust pipe. The hot flue gas inside the furnace body 13 is drawn to the outside of the furnace body 13 through the hot flue gas pipe 16. A bottom cavity 18 is provided below the furnace body 13. The bottom cavity 18 is connected to the lower end of the hot flue gas pipe 16. An exhaust chamber 1 is provided below the second fan 3 and is connected to the air inlet of the second fan 3. The exhaust chamber 1 is connected to the bottom cavity 18. The hot flue gas from the hot flue gas pipe 16 passes through the bottom cavity 18 and the exhaust chamber 1 in sequence, which facilitates the collection of dust in the hot flue gas and reduces the dust content of the hot flue gas.

[0027] like Figure 1 As shown, the combustion bowl 14 is located above the ash box 15, combined with... Figure 4 As shown, the combustion bowl 14 includes a bowl body 141 and a bottom plate 142. The bowl body 141 is fixedly connected inside the furnace body 13. The bottom of the bowl body 141 has a through channel to facilitate the placement of the bottom plate 142 at the bottom of the bowl body 141. The diameter of the bowl body 141 is larger at the top and smaller at the bottom to facilitate the collection of ash and slag produced during combustion onto the bottom plate 142.

[0028] like Figure 5 , Figure 6As shown, a rotating shaft 201 is provided at the bottom of the base plate 142. The rotating shaft 201 and the bottom of the base plate 142 are fixedly connected. The base plate 142 is symmetrical or approximately symmetrical on the left and right sides of the rotating shaft 201. A positioning groove 142d adapted to the end of the rotating shaft 201 is provided at the bottom of the base plate 142. Screws 144 for fixing the end of the rotating shaft 201 are provided on the side of the positioning groove 142d. A cover plate 143 is provided below the positioning groove 142d. The end of the rotating shaft 201 can be inserted into the bottom of the base plate 142 from the opening side of the positioning groove 142d, and the rotating shaft 201 is fixed to the base plate 142 by the screws 144. Figure 7 As shown, in order to facilitate the positioning of screw 144, a portion of the side of the end of the rotating shaft 201 can be set as a plane that contacts the end of screw 144, thereby preventing the end of the rotating shaft 201 from deflecting when it is fixed to screw 144.

[0029] like Figure 5 , Figure 6 As shown, a rotating pin 142b is provided on the side of the base plate 142 away from the drive motor 2, and a pin hole 141b is provided on the bowl body 141 to rotatably engage with the rotating pin 142b. The rotating pin 142b and the rotating shaft 201 are arranged coaxially. The pin hole 141b of the bowl body 141 can rotate and position the rotating pin 142b, thereby improving the overall rotational accuracy of the base plate 142 and ensuring the stability and reliability of the base plate 142 during rotation.

[0030] like Figure 1 , Figure 4 As shown, a drive motor 2 is installed on the outside of the furnace body 13. A reducer 204, which drives the drive motor 2, is installed at the output end of the drive motor 2. The output shaft 204a of the reducer 204 is coaxially connected to the rotating shaft 201. The drive motor 2 and the reducer 204 are fixed by a bracket 202, ensuring that both the drive motor 2 and the reducer 204 are at a certain distance from the furnace body 13, preventing heat from the furnace body 13 from being directly conducted to the reducer 204 and the drive motor 2. When the drive motor 2 starts, after the reducer 204 reduces speed and increases torque, the rotating shaft 201 drives the bottom plate 142 to rotate along the horizontal axis or near the horizontal axis. When the rotating shaft 201 rotates within a range of approximately ±5 degrees along the horizontal axis or near the horizontal axis, it helps to maintain the stability of the bottom plate's rotation. When the bottom plate 142 rotates, its rotation axis remains at the bottom of the combustion bowl 14. After the bottom plate 142 flips over, the ash and slag inside the combustion bowl 14 can be discharged. The reducer 204 can be multi-stage to achieve a larger rotational torque, making it easy to rotate the base plate 142.

[0031] like Figure 7As shown, a connecting sleeve 203 is provided on the outside of the rotating shaft 201. The output shaft 204a, the rotating shaft 201, and the connecting sleeve 203 are fixed together by a connecting pin 27. A switch 205 acting on the connecting sleeve 203 is provided on the outside of the furnace body 13. The switch 205 can be either a manual switch or an automatic switch of the prior art. When the actuating end 205a of the switch 205 extends into the connecting sleeve 203, the rotating shaft 201 stops rotating and is positioned so that the base plate 142 connected to the rotating shaft 201 is in a horizontal state.

[0032] To facilitate the smooth flow of ash and slag through the bottom plate 142 and the air, such as Figure 5 As shown, the base plate 142 has several downward-through bottom holes 142c, a gap is provided between the outer edge of the base plate 142 and the inner wall of the bowl 141, and the outer edge of the base plate 142 has several grooves 142a with openings facing the inner wall of the bowl 141. Figure 6 , Figure 7 As shown, the side wall of the bowl 141 is provided with a number of side wall through holes 141a, which are close to the upper part of the side wall of the bowl 141 and arranged around the central axis of the bowl 141.

[0033] Combination Figure 2 , Figure 3 As shown, a hot water exchange tank 9 is provided on the outer wall of the furnace body 13. The hot flue pipe 16 passes through the hot water exchange tank 9. The hot water exchange tank 9 is provided with an inlet channel 21 and an outlet channel 20. Cold water from the inlet channel 21 enters the hot water exchange tank 9. A water pump 22 is provided on the inlet channel 21, and a pressure stabilizing tank 19 is provided on the outlet channel 20 to stabilize the outlet water pressure. In order to maximize the utilization of the heat of the furnace body 13, the hot water exchange tank 9 surrounds the three sides of the outer wall of the furnace body 13, forming a C-shaped enclosure around the furnace body 13. The center of the combustion bowl 141 is located on the side of the furnace body 13 near the hot water exchange tank 9. A preheating zone 10 is provided between the hopper 8 and the hot water exchange tank 9, connecting the heat exchange pipe 11 and the first fan 5. The airflow direction of the preheating zone 10 is parallel to the airflow direction of the furnace body 13, and the heat exchange pipe 11 is arranged horizontally above the furnace body 13.

[0034] like Figure 1 , Figure 2 As shown, the hot flue pipe 16 is provided with cleaning rings 17 spirally arranged along the pipe wall. The cleaning rings 17 on the same side of the hot flue pipe 16 have a common connecting frame 23 at their top, and a pull rod 26 is provided on the connecting frame 23. The top of the furnace body 13 is provided with a guide block 24 and a vertically movable cleaning plate 25. The pull rod 26 is slidably connected to the guide block 24, and the upper end of the pull rod 26 is fixedly connected to the cleaning plate 25. The cleaning plate 25 is provided with a handle 25a. When the cleaning plate 25 moves up and down, it drives all the cleaning rings 17 on both sides to move synchronously. The cleaning rings 17 act on the inner wall of the hot flue pipe 16 to clean the ash, thus cleaning all the hot flue pipes 16 and improving the cleaning efficiency.

[0035] During actual operation, fuel particles are fed from the feeding channel 7 at the top of the combustion bowl 14. The fuel particles are supported by the inner wall of the bowl 141 and the bottom plate 142. After being ignited by the ignition rod 4, the fuel particles burn and generate heat. Outside air can flow into the combustion bowl 14 through the bottom through-hole 142c of the bottom plate 142, the gap between the outer edge of the bottom plate 142 and the inner wall of the bowl 141, the groove 142a of the outer edge of the bottom plate 142, and the through-hole 141a of the side wall of the bowl 141 to supply oxygen. During combustion, the bottom plate 142 can be rotated back and forth at a small angle by controlling the drive motor 2, achieving a shaking effect and facilitating the timely discharge of ash and slag from the combustion bowl 14. When the fuel particles in the combustion bowl 14 are completely burned, the bottom plate 142 can be flipped at a large angle by controlling the drive motor 2 to completely discharge the ash and slag from the combustion bowl 14 into the ash box 15. Outside cold air is delivered to the heat exchange tube 11 by the first fan 5. The hot flue gas generated by the combustion of fuel particles inside the furnace body 13 exchanges heat with the heat exchange tube 11, causing the air temperature inside the heat exchange tube 11 to rise. The hot air is then discharged from the hot air outlet 12. The second fan 3 generates negative pressure, causing the hot flue gas to be drawn out of the furnace body 13 through the hot flue pipes 16 on both sides of the furnace body 13 and discharged from the external exhaust pipe. Since the hot flue gas in the hot flue pipes 16 still has some residual heat, it can heat the hot water tank 9, raising the water temperature inside the hot water tank 9. The hot water in the hot water tank 9 can be discharged by the water pump 22, while cold water is continuously pumped into the hot water tank 9 for heating.

[0036] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fireplace comprising a fire body (13) and a combustion bowl (14) arranged at the bottom of the fire body (13), characterized in that, The combustion bowl (14) comprises a bottom-through bowl body (141) and a bottom plate (142) arranged at the bottom-through of the bowl body (141), the outside of the furnace body (13) is provided with a driving motor (2) driving the bottom plate (142) to overturn, the rear side of the furnace body (13) is provided with a material bin (8) feeding the top of the combustion bowl (14), the top of the furnace body (13) is provided with a hot air outlet (12) and a plurality of heat exchange pipes (11) communicating with the hot air outlet (12), the lower side of the material bin (8) is provided with a first fan (5) communicating with the heat exchange pipes (11), the two sides of the furnace body (13) are respectively provided with hot smoke pipes (16) communicating with the top of the furnace body (13), the lower side of the material bin (8) is provided with a second fan (3) drawing the hot flue gas in the furnace body (13) to the outside of the furnace body (13) through the hot smoke pipes (16), the outside wall of the furnace body (13) is provided with a heat exchange water tank (9), the hot smoke pipes (16) pass through the heat exchange water tank (9), and the heat exchange water tank (9) is provided with a water inlet channel (21) and a water outlet channel (20).

2. The fireplace of claim 1, wherein, The bottom of the bottom plate (142) is provided with a rotating shaft (201) driven by the driving motor (2), the rotating shaft (201) is arranged along or close to the horizontal axis, and the bottom plate (142) is symmetrical or approximately symmetrical on the left and right sides of the rotating shaft (201).

3. The fireplace of claim 2, wherein, The output end of the driving motor (2) is provided with a speed reducer (204), the outside of the rotating shaft (201) is provided with a connecting sleeve (203), the output shaft (204a) of the speed reducer (204), the rotating shaft (201) and the connecting sleeve (203) are fixed through a connecting pin (27), and the outside of the furnace body (13) is provided with a switch (205) acting on the connecting sleeve (203).

4. The fireplace of claim 2, wherein, The side of the bottom plate (142) away from the driving motor (2) is provided with a rotating pin (142b), and the sidewall of the bowl body (141) is provided with a pin hole (141b) in rotating cooperation with the rotating pin (142b).

5. The fireplace of claim 1, wherein, The bottom plate (142) is provided with a plurality of downward-through bottom through holes (142c), a gap is formed between the outer edge of the bottom plate (142) and the sidewall of the bowl body (141), and the outer edge of the bottom plate (142) is provided with a plurality of groove bodies (142a) with openings directed to the inside of the sidewall of the bowl body (141).

6. The fireplace of claim 1, wherein, The hot smoke pipe (16) is provided with a plurality of dust removal rings (17) arranged spirally along the pipe wall, the top of the dust removal ring (17) corresponding to the same side hot smoke pipe (16) is provided with a common connecting frame (23), and the connecting frame (23) is provided with a pull rod (26).

7. The fireplace of claim 6, wherein, The top of the furnace body (13) is provided with a guide block (24) and an up-and-down movable dust removal plate (25), the pull rod (26) is in sliding connection with the guide block (24), and the upper end of the pull rod (26) is fixedly connected with the dust removal plate (25).

8. The fireplace of claim 1, wherein, The heat exchange water tank (9) is arranged around the outside wall of the furnace body (13) or at least around most of the outside wall, and the center of the bowl body (141) of the combustion bowl (14) is arranged on the side of the furnace body (13) close to the heat exchange water tank (9).

9. The fireplace of claim 1 wherein, The preheating area (10) is provided between the bin (8) and the heat exchange water tank (9) and is communicated with the heat exchange pipe (11) and the first fan (5), the airflow direction of the preheating area (10) is parallel to the airflow direction of the furnace body (13), and the heat exchange pipe (11) is horizontally arranged above the furnace body (13).

10. The fireplace of claim 1, wherein, The bottom cavity (18) communicated with the hot flue (16) is arranged below the furnace body (13), the air suction chamber (1) communicated with the air inlet of the second fan (3) is arranged below the second fan (3), and the air suction chamber (1) is communicated with the bottom cavity (18).

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