A heat-insulated, high-temperature resistant direct-drive box-type fan

Abstract

The application relates to the field of mechanical ventilation, and discloses a heat-insulation high-temperature-resistant direct-connection box-type fan, which comprises a main box body, an impeller and a driving element, a partition plate is arranged in the main box body, the partition plate divides the main box body into a smoke exhaust box body and a driving box body; the impeller is arranged in the smoke exhaust box body, an air inlet and an air outlet are formed in the smoke exhaust box body, the smoke exhaust box body is composed of a first box plate and the partition plate, the first box plate and the partition plate are both double-layer structures and are filled with first heat-insulation elements; the driving element is arranged in the driving box body, a driving end of the driving element is connected with the impeller, the driving box body is composed of a second box plate and the partition plate, and the second box plate is a single-layer structure. The heat of the oil fume is blocked by the smoke exhaust box body filled with the first heat-insulation elements, so that the temperature in the driving box body is not too high, the driving element is not prone to faults, and the safety hidden danger of the high temperature of the main box body is reduced; the single-layer second box plate has high heat dissipation effect, and the heat generated by the driving element can be quickly dissipated.

Description

Technical Field

[0001] This invention relates to the field of mechanical ventilation, and in particular to a heat-insulated, high-temperature resistant direct-drive box-type fan. Background Technology

[0002] The main function of box-type fans is to ventilate and exchange air, improve indoor air quality, reduce the impact of polluted air on human health, and improve the work efficiency of staff in the environment.

[0003] Currently, most box-type fans used for exhausting cooking fumes on the market use belt drive. The motor is installed outside the box, and the motor drives the impeller inside the box to rotate, thereby exhausting the cooking fumes. Some box-type fans use direct drive, where the motor and impeller are connected and both are located inside the box. The motor directly drives the impeller to rotate, thereby exhausting the cooking fumes.

[0004] When using belt drive, the cost of transmission components such as pulleys, cone sleeves, and belts is relatively high, which leads to a higher cost for the entire fan; in addition, belts are wear parts and require frequent maintenance and replacement.

[0005] When using a direct drive method, the motor is inside the airflow. Since the airflow temperature is very high when exhausting oil fumes, and the motor cannot work in a high-temperature environment for a long time, the motor is prone to failure. At the same time, the motor itself also generates heat. When the fan is running, the temperature of the airflow and the motor is transferred to the outside of the housing, causing the temperature of the housing shell to be very high, which poses a risk to personal safety. Summary of the Invention

[0006] In order to reduce the maintenance and production costs of box-type fans and improve the problems of poor heat insulation and heat dissipation of box-type fans, the present invention provides a heat-insulated and high-temperature resistant direct-drive box-type fan.

[0007] The present invention provides a heat-insulated, high-temperature resistant direct-drive box-type fan with the following technical solution:

[0008] A heat-insulated, high-temperature resistant direct-drive box-type fan includes a main housing, an impeller, and a drive unit. The main housing is divided into a smoke exhaust housing and a drive housing by a partition. The impeller is located within the smoke exhaust housing, which has an air inlet and an air outlet. The smoke exhaust housing is composed of multiple first panels and partitions, all of which are double-layered and filled with first insulation material. The drive unit is located within the drive housing, with its drive end penetrating the partition and connecting to the impeller. The drive housing is composed of multiple second panels and partitions, where each second panel is a single-layered structure.

[0009] By adopting the above technical solution, a direct-drive box-type fan is used for exhausting oil fumes, reducing the maintenance and production costs of the box-type fan. The drive unit inside the drive box drives the impeller inside the exhaust box to rotate. The impeller draws oil fumes into the exhaust box through the inlet and then discharges them through the outlet. The exhaust box and the drive box are separated by a partition, preventing oil fumes from entering the drive box. Furthermore, the first insulation layer and the partition block heat from the oil fumes, preventing the temperature inside the drive box from becoming too high. This allows the drive unit to operate at room temperature for extended periods, reducing the likelihood of drive unit failure. Simultaneously, the single-layer second insulation layer has high heat dissipation, allowing heat generated by the drive unit to dissipate quickly. The first insulation layer also blocks heat from the exhaust box, preventing the main casing temperature from becoming too high and reducing safety hazards.

[0010] Preferably, corner panels are provided at the intersection of the three first or second panels, and frame strips are provided at the connection of the two first panels, the connection of the two second panels, and the connection between the first and second panels. Second insulation components are filled in the corner panels and frame strips around the exhaust box.

[0011] By adopting the above technical solution, the second insulation component, which fills the corners and frame strips of the smoke exhaust box, insulates the smoke exhaust box, thereby making the smoke exhaust box more effective in insulation.

[0012] Preferably, the second panel on the side of the drive housing is a louvered panel.

[0013] By adopting the above technical solution, the louver panel increases the ventilation of the second box panel, thereby making the heat dissipation effect of the drive box better.

[0014] Preferably, multiple oil scrapers are provided on the top wall of the inner cavity of the smoke exhaust box and the side wall away from the air outlet. The oil scrapers are tilted against the wind in the direction closer to the impeller, and a drain outlet is opened in the first box plate at the bottom of the smoke exhaust box.

[0015] By adopting the above technical solution, the fumes are drawn into the exhaust box through the air inlet. The fumes flow around the impeller within the exhaust box and are then discharged through the air outlet. As the fumes flow within the exhaust box, they collide with the scraper blades, causing the oil in the fumes to quickly condense and settle on the scraper blades. The oil drips from the scraper blades onto the first panel at the bottom of the exhaust box and is discharged through the drain outlet. This design uses the scraper blades to initially remove the oil from the fumes, thereby reducing the output of oil to downstream equipment.

[0016] Preferably, the smoke exhaust box is provided with a perforated plate inside the air outlet.

[0017] By adopting the above technical solution, the perforated plate provides a certain degree of obstruction and equalization of the flow of oil fumes before it exits the fan, thereby accelerating the condensation of oil stains in the oil fumes.

[0018] Preferably, the height of the top oil scraper of the exhaust box away from the air inlet is lower than the height of the end near the air inlet. A guide plate is provided between the bottom end of the top oil scraper near the partition and the impeller. The guide plate is arc-shaped, and its height gradually decreases along the direction of oil fume flow. The bottom end of the guide plate is located on the side near the perforated plate.

[0019] By adopting the above technical solution, the oil on the top scraper plate of the exhaust box flows towards the bottom of the scraper plate along its inclined direction. The oil drips from the bottom of the scraper plate onto the guide plate, where it flows downwards and rests on the first panel at the bottom of the exhaust box, finally exiting through the drain port. This design effectively guides the oil dripping from the top scraper plate, preventing it from dripping onto the impeller, and the curved shape of the guide plate does not obstruct the flow of fumes.

[0020] Preferably, the middle of the first panel at the bottom of the exhaust box is recessed downwards, and the drain outlet is located at the center of the recess.

[0021] By adopting the above technical solution, when oil drips onto the first panel at the bottom of the exhaust box, the oil flows along the concave direction of the first panel toward the drain outlet at the center of the concavity, thus facilitating the flow of oil into the drain outlet.

[0022] Preferably, a reinforcing ring is provided inside the partition, and a reinforcing ring plate is provided on the side wall of the partition near the driving member, which is fixedly connected to the reinforcing ring, and the driving member is disposed on the reinforcing ring plate.

[0023] By adopting the above technical solution, the driving component is fixedly installed on the partition plate by the reinforcing ring plate and the reinforcing ring, thereby making the installation of the driving component more stable.

[0024] Preferably, a shaft seal base is provided on the side wall of the partition near the impeller, a shaft seal cover plate is coaxially provided on the shaft seal base, a shaft seal ring is clamped and fixed between the shaft seal base and the shaft seal cover plate, the drive shaft of the drive unit passes through the shaft seal base, the shaft seal ring and the shaft seal cover plate, and the shaft seal ring seals against the drive shaft of the drive unit.

[0025] By adopting the above technical solution, the shaft seal base and the shaft seal cover plate clamp and fix the shaft seal ring, so that the shaft seal ring abuts against the outer wall of the drive shaft of the drive component, thereby sealing the drive shaft of the drive component where it passes through the partition, thereby further improving the heat insulation effect of the exhaust box.

[0026] Preferably, both the first panel of the exhaust box and the second panel of the drive box are covered with rainproof top plates. The ends of the two rainproof top plates that are close to each other are bent upwards and abut against each other. A connecting cover plate is provided above the abutting and bent part of the two rainproof top plates, and the connecting cover plate covers the abutting part of the two rainproof top plates.

[0027] By adopting the above technical solution, the two rainproof roof panels cover the top of the main box, making it difficult for rainwater to flow into the main box, and the connecting cover plate covers the joint of the two rainproof roof panels, making it difficult for rainwater to seep into the joint of the two rainproof roof panels.

[0028] In summary, the present invention has at least one of the following beneficial technical effects:

[0029] 1. By adopting a split main box design, the exhaust box filled with the first insulation component blocks the heat of the oil fumes, preventing the temperature inside the drive box from getting too high. This reduces the risk of drive component failure and lowers the safety hazard of high temperature in the main box. The single-layer second box panel has a high heat dissipation effect, which allows the heat generated by the drive component to dissipate quickly.

[0030] 2. By using a scraper to initially remove oil stains from the fumes, the output of oil stains to downstream equipment is reduced;

[0031] 3. By using inclined scraper blades and guide plates, oil stains drip from the inclined scraper blades onto the guide plates. The guide plates guide the oil stains dripping from the scraper blades on the top of the exhaust box, making it less likely for oil stains to drip onto the impeller. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the heat-insulated and high-temperature resistant direct-connected box-type fan in Embodiment 1 of the present invention;

[0033] Figure 2 This is a cross-sectional view of the overall structure of the heat-insulated and high-temperature resistant direct-connected box-type fan in Embodiment 1 of the present invention;

[0034] Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle;

[0035] Figure 4 This is a schematic diagram of the heat-insulated and high-temperature resistant direct-connected box-type fan in Embodiment 1 of the present invention, highlighting the oil scraper.

[0036] Figure 5 This is an exploded view of the overall structure of the heat-insulated and high-temperature resistant direct-connected box-type fan in Embodiment 1 of the present invention;

[0037] Figure 6This is a front view of a portion of the structure of the heat-insulated and high-temperature resistant direct-connected box-type fan in Embodiment 2 of the present invention, highlighting the guide plate.

[0038] Figure 7 This is a partial structural diagram of the heat-insulated and high-temperature resistant direct-connected box-type fan in Embodiment 2 of the present invention, highlighting the guide plate.

[0039] Figure 8 This is the present invention. Figure 7 Enlarged diagram of point B in the middle.

[0040] Explanation of reference numerals in the attached drawings: 1. Main housing; 11. Exhaust housing; 111. First panel; 12. Drive housing; 121. Second panel; 2. Impeller; 3. Drive unit; 4. Partition; 5. Air inlet; 6. Air outlet; 7. First insulation component; 8. Corner; 9. Frame strip; 10. Second insulation component; 13. Oil scraper; 14. Drain outlet; 15. Mesh plate; 16. Guide plate; 17. Reinforcing ring; 18. Reinforcing ring plate; 19. Shaft seal base; 20. Shaft seal cover plate; 21. Shaft seal ring; 22. Rainproof top plate; 23. Connecting cover plate; 24. Drain pipe; 25. Valve; 26. Shaft disc; 27. Handle; 28. Guide groove. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-8 The present invention will be described in further detail below.

[0042] This invention discloses a heat-insulated, high-temperature resistant direct-connected box-type fan.

[0043] Example 1:

[0044] Reference Figure 1 and 2 A heat-insulated and high-temperature resistant direct-drive box-type fan includes a main housing 1, an impeller 2, and a drive unit 3. The main housing 1 is composed of a smoke exhaust box 11 and a drive box 12. A partition 4 is fixedly installed inside the main housing 1. The partition 4 separates the smoke exhaust box 11 and the drive box 12 and prevents them from communicating with each other.

[0045] The drive component 3 is fixedly installed on the side wall of the partition 4 near the drive housing 12. The impeller 2 is rotatably installed inside the exhaust housing 11. The drive end of the drive component 3 passes through the partition 4 and is fixedly connected to the impeller 2. A circular air inlet 5 is formed on the side wall of the exhaust housing 11 away from the drive housing 12, and a rectangular air outlet 6 is formed on the side wall of the exhaust housing 11 along the diameter direction of the impeller 2. In this invention, the drive component 3 can be a motor.

[0046] The drive unit 3 drives the impeller 2 to rotate. The impeller 2 draws the oily fumes into the chamber of the exhaust box 11 through the air inlet 5. The oily fumes flow within the exhaust box 11 and exit through the air outlet 6, flowing down to the next stage equipment. The partition plate 4 separates the exhaust box 11 from the drive box 12, preventing the oily fumes from entering the drive chamber.

[0047] Specifically, the exhaust box 11 consists of four first box panels 111, one perforated plate 15, one partition 4, four box corners 8, and twelve side frame strips 9. The four box corners 8 and the twelve side frame strips 9 form the frame structure of the exhaust box 11. The four first box panels 111, one perforated plate 15, and one partition 4 are respectively fixedly installed on the six sides of the frame structure of the exhaust box 11, and the perforated plate 15 is installed inside the air outlet 6 of the exhaust box 11.

[0048] In this invention, both the first box panel 111 and the partition 4 are double-layer structures composed of two panels, and the first box panel 111 and the partition 4 are filled with a first insulation component 7. The box corners 8 and the frame strips 9 are hollow structures, and the box corners 8 and the frame strips 9 are filled with a second insulation component 10. In this invention, both the first insulation component 7 and the second insulation component 10 can be selected as thermal insulation materials such as aluminum silicate cotton or rock wool.

[0049] The first insulation component 7 and the second insulation component 10 provide thermal insulation for the exhaust box 11, making it difficult for heat from the oil fume gas to be transferred to the drive box 12. This prevents the drive component 3 from operating in a high-temperature environment for extended periods, thus extending its service life. Simultaneously, the heat within the exhaust box 11 is not easily dissipated, preventing the main box 1 from overheating and reducing safety hazards.

[0050] Specifically, the drive housing 12 consists of five second housing panels 121, a partition 4, four housing corners 8 and twelve side frame strips 9. The four housing corners 8 and the twelve side frame strips 9 form the frame structure of the drive housing 12, and the eight side frame strips 9 on the side of the drive housing 12 closest to the exhaust housing 11 are the side frame strips 9 of the exhaust housing 11.

[0051] Five second-panel panels 121 and one partition 4 are fixedly installed on the six sides of the frame structure of the drive housing 12. Each second-panel panel 121 is a single-layer structure, and the three second-panel panels 121 in the horizontal direction of the exhaust housing 11 are all louvered panels. The louvered panels have excellent air permeability, which makes the drive housing 12 more breathable, thus facilitating the rapid discharge of heat emitted by the drive component 3 from the drive housing 12.

[0052] Reference Figure 2 and 3A reinforcing ring 17 is installed inside the partition 4. The two end walls of the reinforcing ring 17 abut against the two plates of the partition 4, respectively. A reinforcing ring plate 18 is installed on the side wall of the partition 4 near the drive component 3. The reinforcing ring plate 18 is coaxially mounted with the reinforcing ring 17 and fixedly connected by bolts. The drive component 3 is fixedly mounted on the reinforcing ring plate 18. The reinforcing ring 17 and the reinforcing ring plate 18 increase the robustness of the drive component 3 installation, making the drive component 3 more stable during operation.

[0053] The drive shaft of the drive component 3 passes through the partition 4. A shaft disk 26 is fixedly sleeved on the drive shaft of the drive component 3. The impeller 2 is fixedly installed on the shaft disk 26 by bolts. The drive component 3 drives the impeller 2 to rotate through the shaft disk 26.

[0054] A shaft seal base 19 is bolted to the side wall of the partition plate 4 near the impeller 2. A shaft seal cover plate 20 is bolted to the side wall of the shaft seal base 19. A shaft seal ring 21 is installed between the shaft seal base 19 and the shaft seal cover plate 20, and the shaft seal base 19 and the shaft seal cover plate 20 clamp and fix the shaft seal ring 21. The shaft seal base 19, the shaft seal ring 21, and the shaft seal cover plate 20 are all sleeved on the shaft disc 26, and the shaft seal ring 21 abuts against the outer side wall of the shaft disc 26. In this invention, the shaft seal ring 21 can be asbestos packing. The shaft seal ring 21 seals the gap at the shaft hole, thereby further improving the sealing and heat insulation effect of the exhaust box 11.

[0055] Reference Figure 4 Multiple oil scraper blades 13 are bolted to the top first plate 111 of the exhaust box 11 and the first plate 111 on the side of the impeller 2 away from the mesh plate 15. The multiple oil scraper blades 13 on the side of the exhaust box 11 are evenly arranged vertically, and the side of the oil scraper blades 13 near the impeller 2 is inclined downward; the multiple oil scraper blades 13 on the top of the exhaust box 11 are evenly arranged horizontally, and the bottom side of the oil scraper blades 13 near the impeller 2 is inclined to the right.

[0056] After the oily fumes are drawn into the exhaust box 11, they move counterclockwise within the exhaust box 11 (refer to...). Figure 4 (From a certain perspective) the oil fumes flow around the impeller 2, and then flow out of the exhaust box 11 through the perforated plate 15. The oil scraper 13 is tilted against the wind direction. When the oily fumes flow, they collide with the oil scraper 13, causing the oil in the fumes to quickly condense and settle on the oil scraper 13, thereby reducing the output of oil to downstream equipment. At the same time, the perforated plate 15 provides a certain degree of obstruction and equalization of the oily fumes before they exit the fan, thereby accelerating the condensation of oil in the fumes.

[0057] Reference Figure 2 and 4A drain port 14 is provided in the first panel 111 at the bottom of the exhaust box 11. A drain pipe 24 communicating with the drain port 14 is installed on the bottom wall of the first panel 111 at the bottom of the exhaust box 11. A valve 25 is installed at the end of the drain pipe 24 away from the drain port 14. As the oil condensation on the scraper 13 increases, the oil will drip from the scraper 13 and onto the first panel 111 at the bottom of the exhaust box 11. The oil will then flow into the drain pipe 24 from the drain port 14, thereby discharging the oil from the exhaust box 11. The oil in the drain pipe 24 can be discharged by opening and closing the valve 25.

[0058] Reference Figure 5 A rainproof roof panel 22 is bolted to the top of the main housing 1. The perimeter of the rainproof roof panel 22 is bent downwards and covers the top of the main housing 1. When the main housing 1 is located outdoors, the rainproof roof panel 22 covers the main housing 1, thereby reducing the possibility of water entering the main housing 1. Compared with rainproof measures such as applying sealant at the joints of the panels, the waterproof effect of using the rainproof roof panel 22 is better.

[0059] The rainproof roof panel 22 can be used as a single unit. However, if the main body 1 is too large, two rainproof roof panels 22 can be spliced ​​together. The ends of the two rainproof roof panels 22 that are close to each other are bent upwards at 90° to form a first abutting part. The two first abutting parts abut against each other. The tops of the two first abutting parts are bent upwards at 90° in a direction away from each other to form a second abutting part. The ends of the two second abutting parts that are far from each other are bent downwards at 90° to form a connecting part.

[0060] A connecting cover plate 23 is provided on the first abutment portion of the two rainproof roof panels 22. The connecting cover plate 23 is C-shaped and its opening faces downward. The connecting cover plate 23 abuts against the two second abutment portions and is fixedly connected to the two connecting portions by bolts. By using the connecting cover plate 23 to cover the connection between the two rainproof roof panels 22, rainwater is less likely to leak from the connection between the two rainproof roof panels 22, further improving the rainproof effect of the rainproof roof panels 22.

[0061] A handle 27 is fixedly installed in the middle of a second panel 121 on the side of the drive housing 12 away from the exhaust housing 11. This second panel 121 is fixed to the frame structure of the drive housing 12 by a hand-tightening bolt, and a wire hole is provided at the bottom of the second panel 121 for the wiring to pass through. By turning the hand-tightening bolt and using the handle 27, the second panel 121 can be quickly removed, thereby facilitating the inspection and maintenance of the drive component 3.

[0062] The implementation principle of Embodiment 1 of this invention is as follows: the driving component 3 drives the impeller 2 to rotate, and the impeller 2 draws the oily fume gas into the chamber of the exhaust box 11 through the air inlet 5. The oily fume flows within the exhaust box 11 and exits through the air outlet 6, flowing down to the next-level equipment. The partition plate 4 separates the exhaust box 11 and the driving box 12, preventing the oily fume gas from entering the driving chamber. The first insulation component 7 and the second insulation component 10 provide heat insulation for the exhaust box 11, making it difficult for the heat in the oily fume gas to be transferred to the driving box 12. This prevents the driving component 3 from operating in a high-temperature environment for extended periods, thus improving its service life. Simultaneously, the heat within the exhaust box 11 is not easily dissipated, preventing the temperature of the main box 1 from becoming excessively high, thereby reducing safety hazards. The louvered panel has excellent air permeability, further enhancing the air permeability of the driving box 12, facilitating the rapid discharge of heat emitted by the driving component 3 from the driving box 12.

[0063] Example 2:

[0064] Reference Figure 6 and 7 The difference between this embodiment and embodiment 1 is that the height of the oil scraper 13 at the top of the exhaust box 11 near the partition 4 is lower than the height of the oil scraper 13 away from the partition 4. A guide plate 16 is fixedly installed on the side wall of the partition 4 near the impeller 2. The guide plate 16 is located directly below the bottom of the oil scraper 13 at the top of the exhaust box 11 near the partition 4 and above the impeller 2. The guide plate 16 is arc-shaped and its height gradually decreases along the direction close to the mesh plate 15.

[0065] When oil condenses on the scraper 13 at the top of the exhaust box 11, the oil will flow towards the end of the scraper 13 closest to the baffle 4 due to the lower height of the scraper 13 near the baffle 4, and drip off from that end. The oil drips from the scraper 13 onto the guide plate 16, and flows along the guide plate 16 towards the mesh plate 15, eventually settling at the base of the guide plate 16 near the mesh plate 15. At this point, the oil drips from the gap between the mesh plate 15 and the impeller 2, preventing it from dripping onto the impeller 2, and the curved guide plate 16 does not affect the flow of the oily fumes.

[0066] Reference Figure 7 and 8 The bottom end of the scraper blade 13 is bent 180° away from the mesh plate 15, forming an inclined guide groove 28 at the bottom. The height of the guide groove 28 near the partition plate 4 is lower than the height of the end away from the partition plate 4. Oil on the scraper blade 13 enters the guide groove 28 and flows towards the partition plate 4 along the inclined direction of the guide groove 28. The inclined guide groove 28 guides the flow of oil, allowing the oil to drip from the end of the scraper blade 13 near the partition plate 4 onto the guide plate 16.

[0067] Reference Figure 7 The height of the top wall of the guide plate 16 gradually decreases along the direction close to the partition plate 4. When oil drips onto the guide plate 16, the oil will flow along the inclined direction of the top wall of the guide plate 16 towards the partition plate 4, so that when the oil flows on the guide plate 16, it will not drip onto the impeller 2 from the side of the guide plate 16 away from the partition plate 4.

[0068] Reference Figure 6 The first panel 111 at the bottom of the exhaust box 11 is recessed downwards with the drain outlet 14 as the center point. When oil drips onto the first panel 111 at the bottom of the exhaust box 11, the oil flows along the recessed direction of the first panel 111 toward the drain outlet 14 at the center point of the recess, thus facilitating the flow of oil into the drain outlet 14.

[0069] The implementation principle of Embodiment 2 of the present invention is as follows: the oil stains on the top oil scraper 13 of the exhaust box 11 drip onto the guide plate 16, and the oil stains drip from the gap between the mesh plate 15 and the impeller 2 through the guide plate 16 onto the first box plate 111 at the bottom of the exhaust box 11, so that the oil stains will not drip onto the impeller 2.

[0070] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-temperature-resistant direct-coupled box-type fan comprising a main box body (1), an impeller (2) and a driving member (3), characterized in that: The main box (1) is provided with a partition plate (4), which divides the main box (1) into a smoke exhaust box (11) and a driving box (12); The impeller (2) is arranged in the smoke exhaust box (11), the smoke exhaust box (11) is provided with an air inlet (5) and an air outlet (6), the smoke exhaust box (11) is composed of a plurality of first box plates (111) and the partition plate (4), the first box plates (111) and the partition plate (4) are double-layer structures and are filled with first heat preservation members (7); The driving member (3) is arranged in the driving box (12), the driving end of the driving member (3) penetrates through the partition plate (4) and is connected with the impeller (2), the driving box (12) is composed of a plurality of second box plates (121) and the partition plate (4), and the second box plates (121) are single-layer structures; The smoke exhaust box (11) is provided with a plurality of oil scraping plates (13) on the top wall and the side wall away from the air outlet (6) in the inner cavity, the oil scraping plates (13) are inclined against the wind towards the impeller (2), and the first box plate (111) at the bottom of the smoke exhaust box (11) is provided with a pollution discharge port (14); The smoke exhaust box (11) is provided with a mesh plate (15) in the air outlet (6); The height of the oil scraping plate (13) away from the air inlet (5) at the top of the smoke exhaust box (11) is lower than the height of the oil scraping plate (13) close to the air inlet (5), the smoke exhaust box (11) is provided with a flow guide plate (16) between the bottom end of the oil scraping plate (13) close to the partition plate (4) and the impeller (2), the flow guide plate (16) is arc-shaped, the height of the flow guide plate (16) gradually decreases along the direction of oil fume flow, and the bottom end of the flow guide plate (16) is located on the side close to the mesh plate (15).

2. The heat-insulated high-temperature-resistant direct-connected box-type fan according to claim 1, characterized in that: The box corners (8) are arranged at the intersections of the three first box plates (111) or the second box plates (121), the frame strips (9) are arranged at the junctions of the two first box plates (111), the junctions of the two second box plates (121) and the junctions of the first box plates (111) and the second box plates (121), and the second heat preservation members (10) are filled in the box corners (8) and the frame strips (9) on the periphery of the smoke exhaust box (11).

3. The heat-insulated high-temperature-resistant direct-connected box-type fan according to claim 1, characterized in that: The second box plate (121) on the side of the driving box (12) is a louver panel.

4. The heat-insulated high-temperature-resistant direct-connected box-type fan according to claim 1, characterized in that: The middle part of the first box plate (111) at the bottom of the smoke exhaust box (11) is concave downward, and the pollution discharge port (14) is located at the concave center point.

5. The heat-insulated high-temperature-resistant direct-connected box-type fan according to claim 1, characterized in that: The partition plate (4) is provided with a reinforcing ring (17), the side wall of the partition plate (4) close to the driving member (3) is provided with a reinforcing ring plate (18) fixedly connected with the reinforcing ring (17), and the driving member (3) is arranged on the reinforcing ring plate (18).

6. The heat-insulated high-temperature-resistant direct-connected box-type fan according to claim 1, characterized in that: The shaft seal base (19) is coaxially provided with a shaft seal cover plate (20), and a shaft seal ring (21) is clamped and fixed between the shaft seal base (19) and the shaft seal cover plate (20), the driving shaft of the driving member (3) penetrates through the shaft seal base (19), the shaft seal ring (21) and the shaft seal cover plate (20), and the shaft seal ring (21) is sealed against the driving shaft of the driving member (3).

7. The heat-insulated high-temperature-resistant direct-connected box-type fan according to claim 2, characterized in that: The first box plate (111) of the smoke exhaust box (11) and the second box plate (121) of the driving box (12) are both covered with a rainproof top plate (22), the ends of the two rainproof top plates (22) close to each other are bent upwards and abut against each other, a connecting cover plate (23) is arranged above the abutting and bent positions of the two rainproof top plates (22), and the connecting cover plate (23) covers the abutting positions of the two rainproof top plates (22).

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