Heating table

Abstract

The utility model relates to the field of household heating stoves, in particular to a heating table which comprises a stove body and a table plate, a combustion chamber is arranged in the stove body, a stove opening is formed in the top of the combustion chamber, an air inlet hole and a smoke outlet are formed in the stove body, a heat exchange cavity is formed in the stove body, and a partition plate is arranged in the heat exchange cavity. The heat exchange cavity is divided into a smoke exhaust channel and an airflow channel through the partition plate. One end of the smoke exhaust channel is communicated with the stove opening, and the other end of the smoke exhaust channel is communicated with the smoke outlet; the airflow channel is communicated with the air inlet, and external air can circulate in the airflow channel. The heat exchange cavity is formed in the furnace body and divided into the smoke exhaust channel and the airflow channel through the partition plate, high-temperature smoke generated by the combustion chamber is exhausted through the smoke exhaust channel, external low-temperature air continuously circulates in the airflow channel, and the high-temperature smoke and the low-temperature air exchange heat in the heat exchange cavity, so that the temperature of the smoke is reduced; and a heat insulation pipe does not need to be arranged, so that the cost is relatively low.

Description

Technical Field

[0001] This utility model relates to the field of household heating stoves, and in particular to a heating table. Background Technology

[0002] A fire table is a household heating stove that uses biomass fuels such as firewood for heating or cooking. It generally includes a tabletop and a stove body installed under the tabletop. The stove body has a combustion chamber, which is connected to an exhaust pipe that vents the high-temperature flue gas generated in the combustion chamber to the outside.

[0003] However, the exhaust pipe of the existing fire table is directly connected to the top of the combustion chamber. The high-temperature flue gas generated in the combustion chamber is directly discharged to the outside through the exhaust pipe, which makes the exhaust pipe very hot and easy to burn users.

[0004] The patent disclosed in CN202101326U describes a multi-functional household heating table that prevents burns by installing a square heat insulation pipe over a circular exhaust pipe.

[0005] From some perspectives, the aforementioned technology does effectively prevent burns to users by adding square heat insulation pipes, but from a cost perspective, the added square heat insulation pipes undoubtedly increase the overall structural cost.

[0006] Therefore, there is an urgent need for a fire table that can reduce the temperature of flue gas and has a low cost. Utility Model Content

[0007] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a fire table that can reduce the temperature of flue gas and has a low cost.

[0008] The technical solution adopted by this utility model to solve the problem is: a fire table, including a furnace body and a tabletop. The furnace body is provided with a combustion chamber, and the top of the combustion chamber is provided with a stove opening. The furnace body is provided with an air inlet and a smoke exhaust outlet. The furnace body is provided with a heat exchange chamber, and a partition is provided inside the heat exchange chamber. The partition divides the heat exchange chamber into a smoke exhaust channel and an airflow channel. One end of the smoke exhaust channel is connected to the stove opening, and the other end of the smoke exhaust channel is connected to the smoke exhaust outlet. The airflow channel is connected to the air inlet, and external air can circulate in the airflow channel.

[0009] As a further improvement to the above technical solution, the furnace body has a tetrahedral structure, the heat exchange chamber is arranged longitudinally and located at the four corners of the furnace body, and the heat exchange chamber surrounds the combustion chamber; the exhaust channel is located inside the heat exchange chamber and does not contact the side wall of the furnace body, and the airflow channel is located outside the heat exchange chamber and contacts the side wall of the furnace body.

[0010] As a further improvement to the above technical solution, a top plate is provided on the top of the furnace body, and a through hole corresponding to the stove opening is provided in the middle of the top plate; a first partition cavity is provided between the top plate and the combustion chamber, and a first surrounding plate is provided in the first partition cavity, which divides the first partition cavity into a central air passage and a first outer ring air passage, with the first outer ring air passage surrounding the outer periphery of the central air passage; the stove opening is located at the center of the central air passage, and the upper port of the exhaust channel is located on the side of the central air passage; the air inlet includes a first air inlet, which is provided on the top plate and communicates with the first outer ring air passage, allowing external air to enter the first outer ring air passage through the first air inlet.

[0011] As a further improvement to the above technical solution, an upper air intake hole is provided at the bottom of the first outer ring air passage, and an upper air intake channel is provided on the outer side of the upper end of the combustion chamber. The upper air intake hole is connected to the upper air intake channel. The first air intake hole, the first outer ring air passage, the upper air intake hole and the upper air intake channel form an upper oxygen supply path, and the upper oxygen supply path supplies oxygen to the combustion chamber from the upper end of the combustion chamber.

[0012] As a further improvement to the above technical solution, the flue gas outlet is located at the bottom of the furnace body, and a second partition cavity is provided between the bottom of the furnace body and the combustion chamber; a second enclosure plate is provided in the second partition cavity, which divides the second partition cavity into a flue gas duct and a second outer ring gas duct, the second outer ring gas duct being located on the outer periphery of the flue gas duct; the flue gas outlet is located inside the flue gas duct, and the lower end of the flue gas duct is connected to the flue gas duct; the air inlet includes a second air inlet, which is located at the lower end of the side wall of the furnace body and is connected to the second outer ring gas duct, allowing external air to enter the second outer ring gas duct from the second air inlet.

[0013] As a further improvement to the above technical solution, a lower air intake hole is provided at the top of the second outer ring air passage, and a lower air intake channel is provided on the outer side of the lower end of the combustion chamber. The lower air intake hole is connected to the lower air intake channel. The second air intake hole, the second outer ring air passage, the lower air intake hole and the lower air intake channel form a lower oxygen supply path, and the lower oxygen supply path supplies oxygen to the combustion chamber from the lower end of the combustion chamber.

[0014] As a further improvement to the above technical solution, a first notch is provided at the bottom corner of the first outer ring air passage, the first notch connecting the first outer ring air passage and the airflow passage; a second notch is provided on the upper side of the airflow passage, the second notch connecting the upper air intake passage and the airflow passage; a third notch is provided on the lower side of the airflow passage, the third notch connecting the lower air intake passage and the airflow passage.

[0015] As a further improvement to the above technical solution, openings are provided on all four side walls of the furnace body, the openings connecting the combustion chamber to the external environment, and viewing windows are installed on the openings, which can be opened or closed.

[0016] As a further improvement to the above technical solution, the upper air intake channel is located on the upper side of the viewing window, and the lower air intake channel is located on the lower side of the viewing window; both the upper and lower air intake channels are provided with guide plates, which are obliquely arranged and guide the airflow to the viewing window.

[0017] As a further improvement to the above technical solution, the upper air intake channel and the lower air intake channel are divided into a wide section and a narrow section. The flow area of ​​the wide section is larger than that of the narrow section, and the airflow passes through the wide section and the narrow section in sequence.

[0018] The beneficial effects of this utility model are as follows: By setting a heat exchange chamber inside the furnace body, the heat exchange chamber is divided into a flue gas passage and an airflow passage by a partition. The high-temperature flue gas generated in the combustion chamber is discharged through the flue gas passage, while the external low-temperature air flows continuously in the airflow passage. The high-temperature flue gas and the low-temperature air exchange heat in the heat exchange chamber, which reduces the temperature of the flue gas and thus prevents burns to users. There is no need to install heat insulation pipes, and the cost is low. Attached Figure Description

[0019] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a front view of the preferred embodiment of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the AA direction;

[0022] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure in the BB direction;

[0023] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure in the CC direction;

[0024] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure in the DD direction;

[0025] Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure in the EE direction;

[0026] Figure 7 for Figure 4 Enlarged structural diagram at point A;

[0027] Figure 8 for Figure 4 Enlarged structural diagram at point B;

[0028] Figure 9 for Figure 6 Enlarged structural diagram at point C;

[0029] Figure 10 for Figure 6 Enlarged structural diagram at point D;

[0030] Figure 11 This is a schematic diagram of the various airflow paths of this utility model;

[0031] Figure 12 This is a schematic diagram of the overall structure of this utility model;

[0032] In the diagram: 1-furnace body, 10-opening, 11-combustion chamber, 111-cooker opening, 112-ash removal hole, 12-smoke exhaust port, 13-heat exchange chamber, 131-partition plate, 132-smoke exhaust passage, 133-airflow passage, 1331-second notch, 1332-third notch, 14-top plate, 141-through hole, 142-first air inlet, 15-first partition chamber, 151-first enclosure plate, 152-central air passage, 153-first outer ring air passage, 1531-first notch 154-Upper air inlet, 16-Upper air inlet channel, 17-Second partition chamber, 171-Second enclosure, 172-Exhaust duct, 173-Second outer ring duct, 1731-Lower air inlet, 18-Second air inlet, 19-Lower air inlet channel, 2-Tabletop, 3-Bracket, 4-Viewing window, 5-Guide plate, 51-Wide section, 52-Narrow section, 6-Dust collection drawer, 71-Upper oxygen supply path, 72-Lower oxygen supply path, 73-First oxygen replenishment path, 74-Second oxygen replenishment path. Detailed Implementation

[0033] In all embodiments of this utility model, unless otherwise emphasized, the temperature and pressure are at normal temperature and pressure. Unless otherwise specified, the equipment can be used according to conventional settings.

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0035] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0036] Reference Figures 1 to 12A fire table includes a tabletop 2 and a stove body 1. The tabletop 2 is installed on top of the stove body 1. A combustion chamber 11 is provided inside the stove body 1, where biomass fuel such as firewood is burned. A stove opening 111 is provided at the top of the combustion chamber 11, and the heat generated by the combustion in the combustion chamber 11 is transferred to the tabletop 2 through the stove opening 111. An air inlet and a smoke exhaust outlet 12 are provided on the stove body 1. The air inlet supplies oxygen to the combustion chamber 11, and the smoke exhaust outlet 12 discharges the high-temperature flue gas generated by the combustion in the combustion chamber 11. A heat exchange chamber 13 is provided inside the stove body 1, and a partition 131 is provided inside the heat exchange chamber 13, dividing the heat exchange chamber 13 into a smoke exhaust channel 132 and an airflow channel 133. One end of the exhaust duct 132 is connected to the stove opening 111, and the other end of the exhaust duct 132 is connected to the exhaust port 12. The smoke generated by the stove opening 111 passes through the exhaust duct 132 and the exhaust port 12 in sequence, and finally exits from the exhaust port 12 to the fire table. It should be noted that in actual use, the exhaust port 12 will also be equipped with an exhaust pipe (not shown) to exhaust the smoke outdoors. The airflow duct 133 is connected to the air inlet, and external (cold) air can circulate in the airflow duct 133, so that the high-temperature smoke and external (cold) air can exchange heat in the heat exchange chamber 13, thereby reducing the temperature of the smoke and thus reducing the temperature of the smoke entering the exhaust pipe, thereby achieving the purpose of preventing burns. There is no need to install a heat insulation sleeve on the exhaust pipe, reducing costs.

[0037] In a preferred embodiment, the furnace body 1 has a tetrahedral structure, and the heat exchange chamber 13 is elongated and longitudinally arranged. There are four heat exchange chambers 13, which are located at the four corners of the furnace body 1 and surround the combustion chamber 11. The exhaust duct 132 is located inside the heat exchange chamber 13 and does not contact the side wall of the furnace body 1. The airflow duct 133 is located outside the heat exchange chamber 13 and contacts the side wall of the furnace body 1. The airflow duct 133 is located outside the exhaust duct 132 to prevent the heat of the flue gas from being directly transferred to the side wall of the furnace body 1, thereby preventing burns. Multiple heat exchange chambers 13 can improve exhaust efficiency while increasing the heat exchange area, further reducing the temperature of the flue gas. It should be noted that the "inner side of the heat exchange chamber 13" refers to the corner of the heat exchange chamber 13 near the center of the furnace body 1, and the "outer side of the heat exchange chamber 13" refers to the corner of the heat exchange chamber 13 away from the center of the furnace body 1. In this embodiment, the airflow channel 133 is corner-shaped, and the exhaust channel 132 is located inside the corner of the airflow channel 133.

[0038] In a preferred embodiment, a top plate 14 is provided on the top of the furnace body 1, and a tabletop 2 is installed on the top plate 14. A gap is left between the tabletop 2 and the top plate 14. A through hole 141 corresponding to the stove opening 111 is provided in the middle of the top plate 14. The through hole 141 is coaxial with the stove opening 111, and the heat discharged from the stove opening 111 is transferred to the tabletop through the through hole 141. A first partition cavity 15 is provided between the top plate 14 and the combustion chamber 11. A first surrounding plate 151 is provided in the first partition cavity 15, and the first surrounding plate 151 divides the first partition cavity 15 into a central air passage 152 and a first outer ring air passage 153. The first outer ring air duct 153 surrounds the outer periphery of the central air duct 152; the stove opening 111 is located at the center of the central air duct 152, and the upper ports of the four exhaust channels 132 are all located at the corners of the central air duct 152; the air inlet includes a first air inlet 142, which is disposed on the top plate 14 and communicates with the first outer ring air duct 153, allowing external air to enter the first outer ring air duct 153 through the first air inlet 142. By introducing external cold air into the first outer ring air duct 153, the external cold air exchanges heat with the flue gas through the first enclosure 151, further reducing the exhaust temperature of the flue gas.

[0039] In a preferred embodiment, an upper air inlet 154 is provided at the bottom of the first outer annular air passage 153 (i.e., the bottom plate of the first partition cavity 15), and an upper air inlet channel 16 is provided on the outer side of the upper end of the combustion chamber 11. The upper air inlet channel 16 is located below the first partition cavity 15, and the upper air inlet 154 communicates with the upper air inlet channel 16. The first air inlet 142, the first outer annular air passage 153, the upper air inlet 154, and the upper air inlet channel 16 form an upper oxygen supply path 71, which supplies oxygen to the combustion chamber 11 from the upper end of the combustion chamber 11.

[0040] In a preferred embodiment, the exhaust port 12 is located at the bottom of the furnace body 1, and a second partition cavity 17 is provided between the bottom of the furnace body 1 and the combustion chamber 11; a second enclosure plate 171 is provided inside the second partition cavity 17, dividing the second partition cavity 17 into an exhaust duct 172 and a second outer ring duct 173, the second outer ring duct 173 being located on the outer periphery of the exhaust duct 172; the exhaust port 12 is located inside the exhaust duct 172, and the lower ends of the four exhaust channels 132 are all connected to the exhaust duct 172, combined with Figure 2 and Figure 6After the flue gas is discharged from the burner opening 111, it flows to the surrounding area, flows to the exhaust channel 132 and flows from top to bottom through the exhaust channel 132, and finally converges into the exhaust duct 172, and is finally discharged from the exhaust port 12 in the exhaust duct 172; the air inlet includes a second air inlet 18, and there are several second air inlets 18. The second air inlets 18 are located at the lower end of the side wall of the furnace body 1 and communicate with the second outer ring air duct 173. External air can enter the second outer ring air duct 173 through the second air inlet 18. By introducing external cold air into the second outer ring air duct 173, the external cold air further exchanges heat with the flue gas through the second enclosure 171, further reducing the exhaust temperature of the flue gas.

[0041] In a preferred embodiment, a lower air intake hole 1731 is provided at the top of the second outer annular air passage 173, and a lower air intake channel 19 is provided on the outer side of the lower end of the combustion chamber 11. The lower air intake hole 1731 is connected to the lower air intake channel 19. The second air intake hole 18, the second outer annular air passage 173, the lower air intake hole 1731 and the lower air intake channel 19 form a lower oxygen supply path 72. The lower oxygen supply path 72 supplies oxygen to the combustion chamber 11 from the lower end of the combustion chamber 11, thereby forming a dual oxygen supply from the upper and lower parts, providing oxygen supply effect in the combustion chamber 11 and improving the combustion efficiency in the combustion chamber 11.

[0042] In a preferred embodiment, a first notch 1531 is provided at the bottom corner of the first outer ring air passage 153, the first notch 1531 connecting the first outer ring air passage 153 and the airflow passage 133; a second notch 1331 is provided on the upper side of the airflow passage 133, the second notch 1331 connecting the upper air intake passage 16 and the airflow passage 133; a third notch 1332 is provided on the lower side of the airflow passage 133, the third notch 1332 connecting the lower air intake passage 19 and the airflow passage 133. The second air inlet 18, the second outer ring air passage 173, the lower air inlet 1731, the third notch 1332, the airflow channel 133, the second notch 1331, and the upper air inlet channel 16 form the first oxygen replenishment path 73; the second air inlet 18, the second outer ring air passage 173, the lower air inlet 1731, the third notch 1332, the airflow channel 133, the first notch 1531, the upper air inlet 154, and the upper air inlet channel 16 form the second oxygen replenishment path 74. Because the air temperature at the top of the furnace body 1 is high, in order to prevent too much high-temperature air from entering the airflow channel 133 from the upper oxygen supply path 71 and affecting the heat exchange effect, the number of the first air inlet 142 is less than the number of the second air inlet 18. The problem of insufficient oxygen supply from the upper oxygen supply path 71 is compensated by the first oxygen supply path 73 and the second oxygen supply path 74. The air channels are interconnected, which further reduces the temperature of the side wall of the furnace body 1 and further achieves the purpose of preventing burns. At the same time, the interconnection of air channels can increase the airflow of the airflow channel 133 and increase the heat exchange effect with the smoke exhaust channel 132.

[0043] In a preferred embodiment, each of the four side walls of the furnace body 1 is provided with an opening 10 (the side walls of the furnace body 1 and the side walls of the combustion chamber 11 are provided with interconnected through holes 141). The opening 10 connects the combustion chamber 11 with the external environment. A viewing window 4 is installed on the opening 10. The viewing window 4 can be opened or closed. By providing the viewing window 4, the fire table can be viewed from all sides, improving the viewing experience of the fire table. Users can also open the viewing window 4 to add biomass fuel such as firewood to the combustion chamber 11, making the viewing window 4 multifunctional.

[0044] In a preferred embodiment, the upper air intake channel 16 is located on the upper side of the viewing window 4, and the lower air intake channel 19 is located on the lower side of the viewing window 4; both the upper air intake channel 16 and the lower air intake channel 19 are provided with a guide plate 5, the guide plate 5 is obliquely arranged, and the tail end of the guide plate 5 is inclined towards the viewing window 4, so that the airflow flows towards the viewing window 4 first when entering the middle of the combustion chamber 11, thereby reducing the temperature of the viewing window 4 and preventing the user from being burned by the excessively high temperature of the viewing window 4.

[0045] In a preferred embodiment, the upper air intake channel 16 and the lower air intake channel 19 are divided into a wide section 51 and a narrow section 52. The flow area of ​​the wide section 51 is larger than that of the narrow section 52. The airflow passes through the wide section 51 and the narrow section 52 in sequence. The airflow can increase the airflow velocity (Venturi effect) by passing from the wide section 51 to the narrow section 52, providing oxygen supply and accelerating the cooling effect on the viewing window 4.

[0046] In some embodiments, a support 3 is also installed at the bottom of the furnace body 1, which supports the furnace body 1.

[0047] In some embodiments, the bottom of the combustion chamber 11 is also provided with an ash discharge hole 112, and an ash collection drawer 6 is movably connected within the second partition. The ash collection drawer 6 is located below the ash discharge hole 112 and collects combustion ash. The user can remove the collected ash by pulling out the drawer.

[0048] The above embodiments do not limit the scope of protection of this utility model. Without departing from the spirit and scope of this utility model, there may be various changes and improvements to this utility model, and all such changes and improvements fall within the scope of this utility model as claimed.

Claims

1. A fire table, comprising a stove body (1) and a tabletop (2), wherein a combustion chamber (11) is provided inside the stove body (1), a stove opening (111) is provided on the top of the combustion chamber (11), and an air inlet and a smoke outlet (12) are provided on the stove body (1), characterized in that: The furnace body (1) is provided with a heat exchange chamber (13), and a partition (131) is provided in the heat exchange chamber (13). The partition (131) divides the heat exchange chamber (13) into a smoke exhaust channel (132) and an airflow channel (133). One end of the exhaust duct (132) is connected to the stove opening (111), and the other end of the exhaust duct (132) is connected to the exhaust port (12); The airflow channel (133) is connected to the air inlet, and external air can circulate within the airflow channel (133).

2. A fire table as described in claim 1, characterized in that: The furnace body (1) has a tetrahedral structure, and the heat exchange chamber (13) is arranged longitudinally and located at the four corners of the furnace body (1). The heat exchange chamber (13) surrounds the combustion chamber (11). The exhaust duct (132) is located inside the heat exchange chamber (13) and does not contact the side wall of the furnace body (1). The airflow duct (133) is located outside the heat exchange chamber (13) and contacts the side wall of the furnace body (1).

3. A fire table as described in claim 2, characterized in that: The furnace body (1) is provided with a top plate (14) at the top, and the top plate (14) is provided with a through hole (141) corresponding to the stove opening (111) in the middle. A first partition cavity (15) is provided between the top plate (14) and the combustion chamber (11). A first enclosure plate (151) is provided inside the first partition cavity (15). The first enclosure plate (151) divides the first partition cavity (15) into a central air passage (152) and a first outer ring air passage (153). The first outer ring air passage (153) surrounds the outer periphery of the central air passage (152). The stove opening (111) is located at the center of the central air duct (152), and the upper port of the smoke exhaust duct (132) is located on the side of the central air duct (152). The air inlet includes a first air inlet (142), which is disposed on the top plate (14) and communicates with the first outer ring air passage (153), allowing external air to enter the first outer ring air passage (153) from the first air inlet (142).

4. A fire table as described in claim 3, characterized in that: The first outer ring air passage (153) is provided with an upper air inlet (154) at the bottom, and the combustion chamber (11) is provided with an upper air inlet channel (16) on the outer side of the upper end. The upper air inlet (154) is connected to the upper air inlet channel (16). The first air inlet (142), the first outer ring air passage (153), the upper air inlet (154) and the upper air inlet passage (16) form an upper oxygen supply path (71), which supplies oxygen to the combustion chamber (11) from the upper end of the combustion chamber (11).

5. A fire table as described in claim 4, characterized in that: The exhaust port (12) is located at the bottom of the furnace body (1), and a second partition chamber (17) is provided between the bottom of the furnace body (1) and the combustion chamber (11). The second partition cavity (17) is provided with a second enclosure plate (171), which divides the second partition cavity (17) into a smoke exhaust duct (172) and a second outer ring duct (173). The second outer ring duct (173) is located on the outer periphery of the smoke exhaust duct (172). The exhaust port (12) is located inside the exhaust duct (172), and the lower end of the exhaust channel (132) is connected to the exhaust duct (172); The air inlet includes a second air inlet (18), which is located at the lower end of the side wall of the furnace body (1) and communicates with the second outer ring air passage (173). External air can enter the second outer ring air passage (173) from the second air inlet (18).

6. A fire table as described in claim 5, characterized in that: The second outer ring air passage (173) is provided with a lower air inlet (1731) at the top, and the combustion chamber (11) is provided with a lower air inlet channel (19) on the outer side of the lower end. The lower air inlet (1731) is connected to the lower air inlet channel (19). The second air inlet (18), the second outer ring air passage (173), the lower air inlet (1731) and the lower air inlet channel (19) form a lower oxygen supply path (72), which supplies oxygen to the combustion chamber (11) from the lower end of the combustion chamber (11).

7. A fire table as described in claim 6, characterized in that: A first notch (1531) is provided at the bottom corner of the first outer ring airway (153), and the first notch (1531) connects the first outer ring airway (153) and the airflow channel (133); The upper side of the airflow channel (133) is provided with a second notch (1331), which connects the upper air intake channel (16) and the airflow channel (133). A third notch (1332) is provided on the lower side of the airflow channel (133), and the third notch (1332) connects the lower air intake channel (19) and the airflow channel (133).

8. A fire table as described in claim 6, characterized in that: The furnace body (1) has openings (10) on its four side walls. The openings (10) connect the combustion chamber (11) to the external environment. The openings (10) are equipped with viewing windows (4) that can open or close the openings (10).

9. A fire table as described in claim 8, characterized in that: The upper air intake channel (16) is located on the upper side of the viewing window (4), and the lower air intake channel (19) is located on the lower side of the viewing window (4). Both the upper air intake channel (16) and the lower air intake channel (19) are provided with guide plates (5). The guide plates (5) are obliquely arranged and guide the airflow to the viewing window (4).

10. A fire table as described in claim 9, characterized in that: The upper air intake channel (16) and the lower air intake channel (19) are divided into a wide section (51) and a narrow section (52). The flow area of ​​the wide section (51) is greater than that of the narrow section (52). The airflow passes through the wide section (51) and the narrow section (52) in sequence.

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