Energy-saving heating mechanism of silicone rubber processing equipment

Abstract

The utility model belongs to the technical field of energy-saving heating, and particularly relates to an energy-saving heating mechanism of silicone rubber processing equipment, which comprises a bottom plate and a heating box, a plurality of exhaust holes are formed in the top of the heating box, a centrifugal exhaust fan is fixedly connected to the front side of the top of the bottom plate, and a fan speed regulator is fixedly connected to the front side of the top of the bottom plate. And the top of the centrifugal exhaust fan communicates with a gas collecting pipe, the right side of the centrifugal exhaust fan communicates with a gas conveying pipe, heat dissipation fences are fixedly connected to the front side and the rear side of the inner wall of the heating box correspondingly, and adjusting air doors are fixedly connected to the sides, away from each other, of the two heat dissipation fences correspondingly. According to the utility model, hot air in the heating box is pumped out through the centrifugal exhaust fan, after the hot air is transferred through the pipeline, heat is dissipated through the heat dissipation holes and the heat exchange fins, the air guiding-out amount is controlled by the adjusting air door, the hot air is prevented from being gathered by the guide plate, the heating efficiency is improved, and the device has the energy-saving effect and also guarantees the processing quality.

Description

Technical Field

[0001] This utility model belongs to the field of energy-saving heating technology, and in particular relates to an energy-saving heating mechanism for silicone rubber processing equipment. Background Technology

[0002] With the application of silicone rubber in the automotive, electronics, and medical fields, the early heating method was coal heating. However, the high energy consumption and low thermal efficiency of coal heating made it impossible to meet the requirements of modern green manufacturing. To address this, energy-saving heating mechanisms for silicone rubber processing equipment were developed. These mechanisms are used for thermal control in the production of silicone rubber products, mainly in the vulcanization and molding processes, to supply and precisely regulate heat. The core components of the heating mechanism include high-efficiency heating components, temperature control modules, thermal insulation layers, and heat recovery components. A balance must be achieved between the material's temperature resistance and the uniformity of the heat field distribution. The heating process for silicone rubber directly affects product quality and production costs.

[0003] Although the efficiency of the energy-saving heating mechanism in silicone rubber processing equipment is related to product quality and production costs, the heating elements of the heating mechanism do not take into account the different heat requirements of different parts of the silicone rubber product during processing. Heat dissipation is faster at the edges and corners of the product, but the number of heating elements does not change, resulting in insufficient heating at the edges and corners of the product. The existing solution is to increase the density of heating elements at the edges and corners of the product. However, the optimization of increasing the density of heating elements in specific locations is done for silicone rubber products of specific types and sizes. When the product specifications change significantly, the design needs to be re-optimized, which is not very flexible. Utility Model Content

[0004] The purpose of this invention is to provide an energy-saving heating mechanism for silicone rubber processing equipment, aiming to solve the technical problem of poor flexibility in increasing the density of heating elements at specific locations in the prior art.

[0005] To achieve the above objectives, the energy-saving heating mechanism for silicone rubber processing equipment provided in this embodiment includes a base plate and a heating box. The top of the heating box has multiple exhaust holes. A centrifugal exhaust fan is fixedly connected to the front top of the base plate, and a fan speed controller is also fixedly connected to the front top of the base plate. An air collection pipe is connected to the top of the centrifugal exhaust fan, and an air supply pipe is connected to the right side of the centrifugal exhaust fan. Heat dissipation grilles are fixedly connected to both the front and rear sides of the inner wall of the heating box. Adjustable dampers are fixedly connected to the opposite sides of the two heat dissipation grilles. Heat pipes are fixedly connected to the inner walls of the two heat dissipation grilles, and the top of each heat pipe is fixedly connected to the same heat exchange fin. Multiple heat dissipation holes are provided on adjacent sides of the two heat dissipation grilles. Multiple guide plates are fixedly connected to both the front and rear sides of the inner wall of the heating box. Multiple temperature sensors and multiple wind speed sensors are fixedly connected to both the front and rear sides of the inner wall of the heating box. A cleaning mechanism is provided on the top right side of the base plate, and this cleaning mechanism is used to clean the conveying components of the device.

[0006] As a further description of the above technical solution:

[0007] The cleaning mechanism includes two upright plates, the bottom of which are fixedly connected to the top right side of the base plate. Elastic scrapers are fixedly connected to adjacent sides of the two upright plates. A servo motor is fixedly connected to the rear side of the rear upright plate. The output end of the servo motor passes through the rear upright plate and is fixedly connected to a brush cleaning roller. Multiple high-temperature resistant brushes are fixedly connected to the outer wall of the brush cleaning roller. A dust collection groove is opened on the top right side of the base plate. A dust collection shell is slidably connected to the inner wall of the dust collection groove. Two fixed blocks are rotatably connected to the top of the dust collection shell.

[0008] As a further description of the above technical solution:

[0009] A cooling fan is fixedly connected to the top left side of the base plate, and a protective frame is fixedly connected to the top left side of the base plate.

[0010] As a further description of the above technical solution:

[0011] Multiple lamp holders are fixedly connected to the top of the inner wall of the heating box, and each of the lamp holders is fixedly connected to a light bulb at its bottom.

[0012] As a further description of the above technical solution:

[0013] A monitor is fixedly connected to the top left side of the heating box, and a buzzer is fixedly connected to the top right side of the heating box.

[0014] As a further description of the above technical solution:

[0015] Vacuum insulation panels are fixedly connected to the outer walls of the gas collecting pipe and the gas transmitting pipe, and the size of the vacuum insulation panels matches that of the gas collecting pipe and the gas transmitting pipe.

[0016] As a further description of the above technical solution:

[0017] A rubber pad is fixedly connected to the bottom of the base plate, and the bottom of the rubber pad is frosted.

[0018] As a further description of the above technical solution:

[0019] A control console is fixedly connected to the top left side of the base plate. The control console is electrically connected to the centrifugal exhaust fan, fan speed controller, regulating damper, temperature sensor, wind speed sensor, servo motor, and cooling fan.

[0020] The above-mentioned technical solutions in the energy-saving heating mechanism of the silicone rubber processing equipment provided in this embodiment of the utility model have at least one of the following technical effects:

[0021] 1. In this utility model, a centrifugal exhaust fan extracts hot air from the top of the heating chamber and transfers it through the air collection pipe and air delivery pipe. This allows part of the transferred heat to be blown out directly from the heat dissipation holes, while the other part is dissipated from the heat exchange fins, improving the uniformity and efficiency of heating. Furthermore, the adjustable damper can adjust the extraction speed and distribution of hot air as needed, and the guide plate can prevent local hot air accumulation, making up for the shortcomings of insufficient heating layout. This makes the device both energy-saving and ensures the processing quality of the product.

[0022] 2. In this utility model, the conveyor belt in the conveying mechanism is initially cleaned by an elastic scraper. At the same time, the servo motor causes the high-temperature resistant brush to rotate around the brush cleaning roller, thereby cleaning the conveying mechanism in the device again. The scraped impurities fall into the dust collection shell in the dust collection trough by gravity, so that the impurities can be uniformly processed in the later stage. The rotating fixed block can prevent the dust collection shell from sliding without reason. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A perspective view of the energy-saving heating mechanism of the silicone rubber processing equipment provided in this embodiment of the utility model.

[0025] Figure 2A front view of the energy-saving heating mechanism of the silicone rubber processing equipment provided in this embodiment of the utility model.

[0026] Figure 3 A cross-sectional view of the base plate of the energy-saving heating mechanism of the silicone rubber processing equipment provided in this embodiment of the utility model.

[0027] Figure 4 A schematic diagram of the heat pipe structure of the energy-saving heating mechanism of the silicone rubber processing equipment provided in this embodiment of the utility model.

[0028] Figure 5 A cross-sectional view of the heat dissipation rail of the energy-saving heating mechanism of the silicone rubber processing equipment provided in this embodiment of the utility model.

[0029] Figure 6 A schematic diagram of the cleaning mechanism of the energy-saving heating mechanism of the silicone rubber processing equipment provided in this embodiment of the utility model.

[0030] The following are the labeling elements in the figure:

[0031] 1—Base plate 2—Heating box 3—Cleaning mechanism 301—Upright plate 302—Elastic scraper 303—Servo motor 304—Brush cleaning roller 305—High-temperature resistant brush 306—Dust collection trough 307—Dust collection shell 308—Fixing block 4—Exhaust port 5—Air collection pipe 6—Centrifugal exhaust fan 7—Fan speed controller 8—Air supply pipe 9—Adjusting damper 10—Heat radiator 11—Heat pipe 12—Heat radiator hole 13—Heat exchange fins 14—Guide plate 15—Temperature sensor 16—Wind speed sensor 17—Cooling fan 18—Protective frame 19—Vacuum insulation board 20—Rubber pad 21—Control console 22—Lamp holder 23—Light bulb 24—Monitor 25—Buzzer Detailed Implementation

[0032] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0033] Reference Figure 3 , Figure 4 and Figure 5This utility model provides an embodiment of an energy-saving heating mechanism for silicone rubber processing equipment, comprising a base plate 1 and a heating chamber 2. The top of the heating chamber 2 has multiple exhaust holes 4, which serve as the locations for extracting hot air from the heating chamber 2. A centrifugal exhaust fan 6 is fixedly connected to the front top of the base plate 1, transferring the hot air from the heating chamber 2 via the centrifugal exhaust fan 6. A fan speed regulator 7 is also fixedly connected to the front top of the base plate 1, used to adjust the rotational speed of the centrifugal exhaust fan 6. The centrifugal exhaust fan 6 has an air collecting pipe 5 connected to its top and an air supply pipe 8 connected to its right side. The air collecting pipe 5 and the air supply pipe 8 serve as components for transferring hot air, and the ends of the air supply pipe 8 are respectively connected to two heat dissipation grilles 10. Heat dissipation grilles 10 are fixedly connected to both the front and rear sides of the inner wall of the heating chamber 2. The heat dissipation grilles 10 serve as components for the transferred hot air to re-enter the heating chamber 2. Adjustable dampers 9 are fixedly connected to the opposite sides of the two heat dissipation grilles 10. The adjustable dampers 9 are used to adjust the airflow between the two heat dissipation grilles 10. The heating chamber 10 is a component for the amount of hot air entering. The inner walls of both heating chambers 10 are fixedly connected to heat pipes 11, which transfer heat more precisely. The top of each heat pipe 11 is fixedly connected to the same heat exchange fin 13, which absorbs the heat from the heat pipes 11 and transfers it to the conveying mechanism. Multiple heat dissipation holes 12 are opened on the adjacent side of each of the two heating chambers 10, which serve as components for the hot air to exit. Multiple guide plates 14 are fixedly connected to the front and rear sides of the inner wall of the heating chamber 2, which guide the hot air. Multiple temperature sensors 15 are fixedly connected to the inner wall of the heating chamber 2, which monitor the temperature at different locations inside the heating chamber 2. Multiple wind speed sensors 16 are fixedly connected to the front and rear sides of the inner wall of the heating chamber 2, which measure the air velocity blown out of the heat dissipation holes 12. A cleaning mechanism 3 is provided on the top right side of the base plate 1, which is used to clean the conveying components of the device.

[0034] Specifically, as heated air rises, once the hot air inside the heating chamber 2 reaches a certain temperature and pressure, the centrifugal exhaust fan 6 is activated to extract the hot air from the top of the heating chamber 2 through the exhaust port 4. The hot air enters the centrifugal exhaust fan 6 through the air collection pipe 5, and is then transported to the heat dissipation grille 10 via the air delivery pipe 8. The operator adjusts the speed of the centrifugal exhaust fan 6 using the fan speed controller 7 according to actual needs, thereby controlling the speed of hot air extraction and transmission. When rapid extraction of hot air is required, the fan speed is increased; when energy consumption is reduced or the hot air transmission speed is fine-tuned, the fan speed is decreased. After the hot air enters the heat dissipation grille 10, the operator adjusts the air damper 9 to control the flow of air into each grille according to the specific heating requirements of the silicone rubber products. When more heat is needed on one side of the product, the opening of the damper 9 of the corresponding side of the heat dissipation grille 10 is increased. The hot air entering the heat dissipation grille 10 is partially blown out through the heat dissipation holes 12 to heat the edges and corners of the silicone rubber product. The other part of the heat is transferred to the heat exchange fins 13 through the heat pipes 11. The heat exchange fins 13 absorb the heat and transfer it to the silicone rubber product on the conveying mechanism, which further improves the uniformity and efficiency of heating. The guide plate 14 on the inner wall of the heating box 2 guides the hot air so that the hot air can be more evenly distributed in the heating box 2. The temperature sensor 15 monitors the temperature at different locations in the heating box 2 in real time, and the wind speed sensor 16 measures the airflow speed blown out of the heat dissipation holes 12 in real time.

[0035] Reference Figure 1 , Figure 2 and Figure 6 The cleaning mechanism 3 includes two upright plates 301, which support elastic scrapers 302. The bottoms of both upright plates 301 are fixedly connected to the top right side of the base plate 1. Elastic scrapers 302 are fixedly connected to adjacent sides of the two upright plates 301. The elastic scrapers 302 scrape away impurities on the conveying mechanism. A servo motor 303 is fixedly connected to the rear side of the rear upright plate 301. The servo motor 303 provides power for the rotation of the brush cleaning roller 304. The output end of the servo motor 303 passes through the rear upright plate 301 and is fixedly connected to the brush cleaning roller 304. Multiple high-temperature resistant brushes 305 are fixedly connected to the outer wall of the brush cleaning roller 304. The high-temperature resistant brushes 305 clean the conveyor belt in the conveying mechanism again. A dust collection groove 306 is provided on the top right side of the base plate 1. The dust collection groove 306 provides a space for the dust collection shell 307. The dust collection shell 307 is slidably connected to the inner wall of the dust collection groove 306. The dust collection shell 307 is used to collect the impurities swept down by the high-temperature resistant brushes 305 and the elastic scraper 302. Two fixing blocks 308 are rotatably connected to the top of the dust collection shell 307. The two fixing blocks 308 are used to fix the dust collection shell 307.

[0036] Specifically, when the conveyor mechanism starts operating and transporting silicone rubber products, the elastic scraper 302 uses its own elasticity to closely adhere to the surface of the conveyor belt, scraping away impurities attached to the conveyor belt. Simultaneously, the output of the servo motor 303 drives the brush cleaning roller 304 to rotate, causing the high-temperature resistant brush 305 on the outer wall to contact the conveyor belt, performing a secondary cleaning of the conveyor belt to remove any fine impurities and debris that the elastic scraper 302 failed to clean. During the cleaning process, the elastic scraper 302 and the high-temperature resistant brush 305... 5. The swept impurities fall into the dust collection trough 306 on the top right side of the base plate 1 under the action of gravity, and enter the dust collection shell 307 for collection. When the dust collection shell 307 is full of impurities, rotate the top fixing block 308 to release the fixing of the dust collection shell 307, and then pull the dust collection shell 307 out of the dust collection trough 306 to empty and clean the impurities. After cleaning, push the dust collection shell 307 back into the dust collection trough 306 and rotate the fixing block 308 to fix the dust collection shell 307 so that impurities can continue to be collected.

[0037] Reference Figure 1 , Figure 2 and Figure 3 A cooling fan 17 is fixedly connected to the top left side of the base plate 1. The cooling fan 17 dissipates heat from the centrifugal exhaust fan 6 and the fan speed controller 7. A protective frame 18 is fixedly connected to the top left side of the base plate 1 to protect the cooling fan 17. Multiple lamp holders 22 are fixedly connected to the top of the inner wall of the heating box 2. Each lamp holder 22 has a light bulb 23 fixedly connected to its bottom to illuminate the interior of the heating box 2. A monitor 24 is fixedly connected to the top left side of the heating box 2 to monitor the surrounding environment. A buzzer 25 is fixedly connected to the top right side of the heating box 2 to alert people in the vicinity. The air collection pipe 5... Vacuum insulation panels 19 are fixedly connected to the outer walls of the gas collecting pipe 5 and the gas supply pipe 8. The vacuum insulation panels 19 prevent heat loss from the gas collecting pipe 5 and the gas supply pipe 8 and also prevent people around from being burned. The size of the vacuum insulation panels 19 matches that of the gas collecting pipe 5 and the gas supply pipe 8. A rubber pad 20 is fixedly connected to the bottom of the base plate 1. The bottom of the rubber pad 20 is frosted. The rubber pad 20 can increase the friction between the device and the ground. A control console 21 is fixedly connected to the top left side of the base plate 1. The control console 21 is electrically connected to the centrifugal exhaust fan 6, the fan speed controller 7, the regulating damper 9, the temperature sensor 15, the wind speed sensor 16, the servo motor 303, and the cooling fan 17.

[0038] Specifically, before the device is put into operation, staff can connect it to a specific mobile device via wireless technology. This allows operators to control multiple components within the device via control panel 21, as well as remotely. When the silicone rubber processing equipment starts operating, and the centrifugal exhaust fan 6 and fan speed controller 7 generate heat, the cooling fan 17 starts to dissipate heat from these components. The protective frame 18 prevents external substances from contacting the operating cooling fan 17, ensuring its safety. After the heating chamber 2 starts operating, the light 23 is turned on. The heating chamber 2 is equipped with lighting to facilitate staff observation of the processing of silicone rubber products. The monitor 24 monitors the surrounding environment of the device in real time. Once an abnormality is detected, the buzzer 25 sounds to alert those nearby. During the transmission of hot air through the gas collecting pipe 5 and the gas delivering pipe 8, the vacuum insulation board 19 effectively prevents heat loss from the gas collecting pipe 5 and the gas delivering pipe 8, while also preventing people nearby from being burned by contact with the pipes. Because the bottom of the rubber pad 20 is frosted, the friction between the device and the ground is increased, keeping the entire silicone rubber processing equipment stable during operation and preventing easy displacement.

[0039] Working Principle: Utilizing the property that heated air rises, when the hot air inside the heating chamber 2 reaches a certain temperature and pressure, the centrifugal exhaust fan 6 extracts the hot air accumulated at the top of the heating chamber 2. The hot air is then transported sequentially through the air collection pipe 5, the centrifugal exhaust fan 6, and the air delivery pipe 8 to the heat dissipation grille 10. The speed of the centrifugal exhaust fan 6 is adjusted by the fan speed controller 7, thereby controlling the speed of hot air extraction and transmission to meet the requirements of hot air flow speed under different working conditions. After the hot air enters the heat dissipation grille 10, the operator precisely controls the flow into each grille by adjusting the opening of the regulating damper 9 according to the specific heating requirements of the silicone rubber products. The amount of hot air in the heat exchanger 10 allows heat to be distributed to different parts of the product as needed. Part of the hot air entering the heat exchanger 10 is blown out directly through the heat dissipation holes 12, which makes up for the deficiencies in the layout of the heating elements. The other part of the heat is efficiently transferred to the heat exchange fins 13 through the heat pipes 11. The heat exchange fins 13 have a large surface area, which evenly transfers heat to the silicone rubber product on the conveying mechanism, further improving the uniformity and efficiency of heating. The guide plate 14 on the inner wall of the heating box 2 can change the flow direction of the hot air, preventing the hot air from accumulating in local areas or forming vortices, thus achieving a more uniform heating effect.

[0040] Furthermore, utilizing the elastic deformation characteristics of the elastic scraper 302, the elastic scraper 302 is made to closely adhere to the surface of the conveyor belt, and impurities are scraped away from the conveyor belt through physical contact. The servo motor 303 drives the brush cleaning roller 304 to rotate, which in turn causes the high-temperature resistant brush 305 to move relative to the conveyor belt. With the dense bristle structure of the brush, it can thoroughly remove fine impurities that are difficult for the elastic scraper 302 to remove, effectively improving the cleaning effect. During the cleaning process, the impurities that are peeled off by the scraper and brush fall naturally due to gravity. The dust collection shell 307 in the dust collection groove 306 on the bottom plate 1 accurately catches the falling impurities. The impurities are collected in a concentrated manner by relying on natural gravity. The fixing block 308 on the top of the dust collection shell 307 adopts a rotating locking design. By rotating the fixing block 308, the relative position relationship between the fixing block 308 and the bottom plate 1 is changed, thereby fixing and unlocking the dust collection shell 307. This allows the operator to quickly disassemble the dust collection shell 307 for emptying and cleaning impurities, ensuring the continuity and efficiency of the cleaning work.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy-saving heating mechanism for silicone rubber processing equipment, comprising a base plate (1) and a heating box (2), characterized in that: The heating box (2) has multiple exhaust holes (4) on its top. A centrifugal exhaust fan (6) is fixedly connected to the front top of the base plate (1). A fan speed controller (7) is fixedly connected to the front top of the base plate (1). An air collection pipe (5) is connected to the top of the centrifugal exhaust fan (6). An air supply pipe (8) is connected to the right side of the centrifugal exhaust fan (6). Heat dissipation bars (10) are fixedly connected to the front and rear sides of the inner wall of the heating box (2). Adjustable dampers (9) are fixedly connected to the opposite sides of the two heat dissipation bars (10). Heat dissipation bars (10) are fixedly connected to the inner walls of the two heat dissipation bars (10). The top ends of the two heat pipes (11) are fixedly connected to the same heat exchange fin (13). Multiple heat dissipation holes (12) are opened on the adjacent side of the two heat dissipation bars (10). Multiple guide plates (14) are fixedly connected to the front and rear sides of the inner wall of the heating box (2). Multiple temperature sensors (15) are fixedly connected to the inner wall of the heating box (2). Multiple wind speed sensors (16) are fixedly connected to the front and rear sides of the inner wall of the heating box (2). A cleaning mechanism (3) is provided on the top right side of the base plate (1). The cleaning mechanism (3) is used to clean the conveying components of the device.

2. The energy-saving heating mechanism for silicone rubber processing equipment according to claim 1, characterized in that: The cleaning mechanism (3) includes two upright plates (301). The bottom of the two upright plates (301) is fixedly connected to the top right side of the base plate (1). An elastic scraper (302) is fixedly connected to the adjacent side of the two upright plates (301). A servo motor (303) is fixedly connected to the rear side of the rear upright plate (301). The output end of the servo motor (303) passes through the rear upright plate (301) and is fixedly connected to a brush cleaning roller (304). Multiple high-temperature resistant brushes (305) are fixedly connected to the outer wall of the brush cleaning roller (304). A dust collection groove (306) is opened on the top right side of the base plate (1). A dust collection shell (307) is slidably connected to the inner wall of the dust collection groove (306). Two fixed blocks (308) are rotatably connected to the top of the dust collection shell (307).

3. The energy-saving heating mechanism for silicone rubber processing equipment according to claim 1, characterized in that: A cooling fan (17) is fixedly connected to the top left side of the base plate (1), and a protective frame (18) is fixedly connected to the top left side of the base plate (1).

4. The energy-saving heating mechanism for silicone rubber processing equipment according to claim 1, characterized in that: The top of the inner wall of the heating box (2) is fixedly connected to a plurality of lamp holders (22), and the bottom of each of the plurality of lamp holders (22) is fixedly connected to an electric lamp (23).

5. The energy-saving heating mechanism for silicone rubber processing equipment according to claim 1, characterized in that: A monitor (24) is fixedly connected to the top left side of the heating box (2), and a buzzer (25) is fixedly connected to the top right side of the heating box (2).

6. The energy-saving heating mechanism for silicone rubber processing equipment according to claim 1, characterized in that: Vacuum insulation panels (19) are fixedly connected to the outer walls of the gas collecting pipe (5) and the gas conveying pipe (8), and the size of the vacuum insulation panels (19) matches that of the gas collecting pipe (5) and the gas conveying pipe (8).

7. The energy-saving heating mechanism for silicone rubber processing equipment according to claim 1, characterized in that: A rubber pad (20) is fixedly connected to the bottom of the base plate (1), and the bottom of the rubber pad (20) is frosted.

8. The energy-saving heating mechanism for silicone rubber processing equipment according to claim 1, characterized in that: A control console (21) is fixedly connected to the top left side of the base plate (1). The control console (21) is electrically connected to the centrifugal exhaust fan (6), the fan speed controller (7), the regulating damper (9), the temperature sensor (15), the wind speed sensor (16), the servo motor (303), and the cooling fan (17).

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