Smoke exhaust power device and lampblack treatment device
By designing a dual-fan system, the problems of wind pressure, air volume and noise of existing range hood exhaust power units are solved, achieving efficient and quiet exhaust effect, and suitable for complex and long-distance exhaust duct systems.
Patent Information
- Application Number
- CN202423233793.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing range hoods have insufficient exhaust power units with inadequate wind pressure and air volume, resulting in high noise levels and poor operational stability, especially under high back pressure and complex environments.
The design employs a dual-fan system, with the blade assemblies of the first and second fan systems arranged in opposite directions of rotation. Combined with a soundproof cover and sleeve structure, this reduces guide vane losses, increases wind pressure and air volume, and lowers noise.
It improves smoke extraction efficiency in high-resistance environments, reduces vibration and noise, achieves high wind pressure, large air volume and stable operation, and enhances user experience.
Smart Images
Figure CN223840438U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of household appliance technology, and in particular to a smoke exhaust power device and an oil fume treatment device. Background Technology
[0002] Range hoods have become an indispensable kitchen appliance in modern homes. Their main function is to remove cooking fumes during cooking, thus maintaining a clean kitchen environment. Existing range hoods consist of a casing and an exhaust motor, which is located inside the casing. When the range hood is in use, the exhaust motor creates a negative pressure zone in the space above the stove, drawing in the cooking fumes. The filtered fumes are then exhausted outdoors through ductwork.
[0003] Currently, most range hoods on the market use axial flow fans as the exhaust power unit. Axial flow fans can be designed to be more compact, which is especially advantageous in kitchen environments with limited space. This allows the product to be smaller and provides more flexible installation and appearance design options.
[0004] Single-stage axial flow fans have relatively low air pressure and air volume, which usually cannot meet the high back pressure operating environment of range hoods. Although increasing the speed of a single-stage axial flow fan can increase its air pressure and air volume, the resulting noise problem cannot be solved. In addition, while increasing the number of impeller stages in an axial flow fan can increase air pressure, the presence of two stages of guide vanes leads to more energy loss, and the vibration problem of double-stage axial flow fans is more prominent, especially in high-resistance operating environments. Excessive vibration and noise can seriously affect the stable operation of the range hood.
[0005] Therefore, there is an urgent need to design a new exhaust power device and a fume treatment device to improve the problems of low wind pressure, low air volume, high noise, and poor operational stability of fume treatment devices. Utility Model Content
[0006] One objective of this invention is to provide a smoke exhaust power device with high wind pressure, large air volume, low noise, and good operational stability.
[0007] To achieve this objective, the present invention adopts the following technical solution:
[0008] A smoke exhaust power device, comprising:
[0009] A first wind turbine system includes a first blade assembly comprising a plurality of first blades arranged along a first rotation direction M; and
[0010] The second wind turbine system includes a second blade assembly, which is coaxially arranged with the first blade assembly. The second blade assembly includes a plurality of second blades arranged along a second rotation direction N. The first rotation direction M is opposite to the second rotation direction N, and the first rotation direction Q of the first blade assembly is opposite to the second rotation direction T of the second blade assembly.
[0011] As an optional embodiment, the first blade assembly further includes a first connecting shaft, with a plurality of first blades surrounding and fixedly connected to the first connecting shaft; the first fan system further includes a first motor, with the first connecting shaft coaxially fixed to the first motor; and / or
[0012] The second blade assembly also includes a second connecting shaft, with a plurality of second blades surrounding the outer periphery of the second connecting shaft and fixedly connected to the second connecting shaft. The second fan system also includes a second motor, with the second connecting shaft and the second motor being coaxially fixed.
[0013] As an alternative, the first wind turbine system also includes a first sleeve, which is fitted around the outer periphery of the first blade assembly.
[0014] As an alternative, the second fan system also includes a second sleeve, which is fitted around the outer periphery of the second blade assembly.
[0015] As an alternative, the cross-sectional area of the first sleeve decreases along the direction of the oil fume flow; and / or
[0016] Along the direction of the oil fume flow, the cross-sectional area of the second sleeve decreases.
[0017] As an alternative, the first blade assembly is located above the second sleeve, with the first sleeve spaced at intervals around the outer periphery of the second sleeve.
[0018] As an optional solution, the first wind turbine system further includes a first silencer enclosure, which surrounds the outer periphery of a plurality of first blades and is fixedly connected to the first blades; and / or
[0019] The second fan system also includes a second silencer, which surrounds the outer periphery of multiple second blades and is fixedly connected to the second blades.
[0020] As an alternative, the plurality of first blades include first long blades and first short blades, the first long blades and first short blades being arranged alternately along the circumference of the first blade assembly, and the first dimension L1 of the first long blade along the radial direction of the first blade assembly being greater than the second dimension L2 of the first short blade along the radial direction of the first blade assembly; and / or
[0021] The plurality of second blades include a second long blade and a second short blade, the second long blade and the second short blade are arranged alternately along the circumference of the second blade assembly, and the third dimension L3 of the second long blade along the radial direction of the second blade assembly is greater than the fourth dimension L4 of the second short blade along the radial direction of the second blade assembly.
[0022] As an alternative, the first long blade and the first short blade are twisted to have a degree of twist, wherein the ratio of the degree of twist of the first short blade to the degree of twist of the first long blade is greater than or equal to 1 / 6 and less than or equal to 2 / 3; and / or
[0023] The second long blade and the second short blade are twisted to have a degree of twist, and the ratio of the degree of twist of the second short blade to the degree of twist of the second long blade is greater than or equal to 1 / 6 and less than or equal to 2 / 3.
[0024] Another objective of this invention is to provide an oil fume treatment device with high wind pressure, large air volume, low noise, and good operational stability.
[0025] To achieve this objective, the present invention adopts the following technical solution:
[0026] An oil fume treatment device includes a housing with an inlet. The oil fume treatment device also includes an exhaust power device as described above, which is disposed inside the housing. The inlet, a second fan system, and a first fan system are arranged sequentially along the flow direction of the oil fumes.
[0027] The beneficial effects of this utility model are:
[0028] The smoke exhaust power device provided by this utility model includes a first fan system and a second fan system. The first fan system includes a first blade assembly, which includes a plurality of first blades arranged along a first rotation direction M. The second fan system includes a second blade assembly, which is coaxially arranged with the first blade assembly. The second blade assembly includes a plurality of second blades arranged along a second rotation direction N. The first rotation direction M is opposite to the second rotation direction N, and the first rotation direction Q of the first blade assembly is opposite to the second rotation direction T of the second blade assembly.
[0029] Compared to existing two-stage axial flow fans, the exhaust power unit provided by this invention does not require additional guide vanes, resulting in a more compact structure and lower cost. Furthermore, the first and second blade assemblies, with opposite arrangement and rotation directions, cooperate to avoid airflow friction losses found in existing guide vanes, reducing internal resistance losses and improving the unit's efficiency. In high-resistance operating environments, the exhaust power unit exhibits low vibration and low noise, enabling quiet operation of the fume treatment device.
[0030] Compared to traditional single axial flow fans, the exhaust power unit provided by this invention can provide higher total pressure and a wider high-efficiency operating range under the same flow conditions. This means that using an exhaust power unit in a fume treatment device can effectively improve exhaust efficiency, especially when facing complex or long-distance exhaust duct systems, it can better overcome resistance and ensure smooth exhaust of fumes.
[0031] The fume treatment device provided by this utility model, by applying the above-mentioned exhaust power device, has high wind pressure, large air volume, low noise and good operational stability. Attached Figure Description
[0032] Figure 1 This is a first cross-sectional view of the fume treatment device provided in this embodiment of the utility model;
[0033] Figure 2 This is a second sectional view of the oil fume treatment device provided in this embodiment of the utility model;
[0034] Figure 3 This is a schematic diagram of the structure of a portion of the first fan system provided in an embodiment of this utility model;
[0035] Figure 4 This is a schematic diagram of the structure of a portion of the second fan system provided in an embodiment of this utility model;
[0036] Figure 5 This is a diagram illustrating the movement of cooking fumes provided in an embodiment of this utility model.
[0037] Figure 6 This is a schematic diagram of the structure of the first fan system provided in this embodiment of the present invention;
[0038] Figure 7 This is a schematic diagram of the structure of the second fan system provided in an embodiment of this utility model.
[0039] In the picture:
[0040] 1000. Fume treatment device;
[0041] 100. Smoke exhaust power unit; 200. Housing; 210. Main unit box; 2101. Outlet; 220. Smoke hood; 2201. Smoke inlet;
[0042] 10. First fan system; 11. First blade assembly; 111. First blade; 1111. First long blade; 1112. First short blade; 112. First connecting shaft; 12. First motor; 13. First sleeve; 131. First section; 132. Second section; 14. First silencer; 141. First silencer body; 142. First noise reduction hole; 15. First mounting bracket;
[0043] 20. Second fan system; 21. Second blade assembly; 211. Second blade; 2111. Second long blade; 2112. Second short blade; 212. Second connecting shaft; 22. Second motor; 23. Second sleeve; 231. Third section; 232. Fourth section; 233. Fifth section; 234. Sixth section; 24. Second silencer; 241. Second silencer body; 242. Second noise reduction hole; 25. Second mounting bracket; 26. Third mounting bracket. Detailed Implementation
[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the drawings, not all of them.
[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0047] In the description of the embodiments disclosed herein, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.
[0048] like Figure 1 and Figure 2As shown, this embodiment of the present disclosure provides an oil fume treatment device 1000. The oil fume treatment device 1000 has become one of the indispensable kitchen appliances in modern families. The main function of the oil fume treatment device 1000 is to remove oil fumes during cooking, thereby maintaining a good kitchen environment.
[0049] like Figure 1 and Figure 2 As shown, the fume treatment device 1000 can be any type of device with fume treatment function, such as a top-mounted range hood, a side-suction range hood, or a top-suction range hood. All types of devices with fume treatment function are within the protection scope of this disclosure. This disclosure describes the structure of the fume treatment device 1000 using a top-suction range hood as an example.
[0050] like Figure 1 and Figure 2 As shown, the fume treatment device 1000 includes a fume exhaust power unit 100 and a housing 200. The housing 200 includes a main unit box 210 and a fume collection hood 220 connected to each other. The fume collection hood 220 is provided with a fume inlet 2201. The fume exhaust power unit 100 is disposed in the main unit box 210. When the fume exhaust power unit 100 is working, a negative pressure is formed inside the main unit box 210. Under the action of the negative pressure, the fume outside the fume treatment device 1000 passes through the fume inlet 2201 and then passes through the fume collection hood 220 and the main unit box 210 in sequence. After the fume is filtered by the fume exhaust power unit 100, it forms clean filtered gas. The clean filtered gas is finally discharged to the outside from the outlet 2101 of the main unit box 210.
[0051] like Figure 1 and Figure 2 As shown, the fume hood 220 can concentrate and collect external oil fumes, thereby achieving better absorption of external oil fumes by the fume treatment device 1000 and improving the absorption effect of the fume treatment device 1000 on oil fumes.
[0052] Currently, most fume treatment devices on the market use axial flow fans as the exhaust power unit. Axial flow fans can be designed to be more compact, which is especially advantageous in kitchen environments with limited space. This allows the product to be smaller and provides more flexible installation and appearance design options.
[0053] Existing axial flow fans can be single-stage axial flow fans. However, single-stage axial flow fans have relatively low air pressure and air volume, which usually cannot meet the high back pressure operating environment of fume treatment devices. Although increasing the speed of a single-stage axial flow fan can increase its air pressure and air volume, the resulting noise problem cannot be solved. In addition, although increasing the number of impeller stages of an axial flow fan can increase air pressure, the presence of two stages of guide vanes leads to more energy loss, and the vibration problem of two-stage axial flow fans is more prominent, especially in high-resistance operating environments. Excessive vibration and noise may seriously affect the stable operation of fume treatment devices.
[0054] To solve the above problems, such as Figures 1-4 As shown, the smoke exhaust power unit 100 includes a first fan system 10 and a second fan system 20. The first fan system 10 includes a first blade assembly 11, which includes a plurality of first blades 111 arranged along a first rotation direction M. The second fan system 20 includes a second blade assembly 21, which is coaxially arranged with the first blade assembly 11. The second blade assembly 21 includes a plurality of second blades 211 arranged along a second rotation direction N. The first rotation direction M is opposite to the second rotation direction N, and the first rotation direction Q of the first blade assembly 11 is opposite to the second rotation direction T of the second blade assembly 21. Figure 5 As shown, when the fumes enter the second blade 211 at a velocity u1, the fumes are diffused and deflected by the rotation of the second blade 211. The absolute velocity u2 of the fumes discharged downstream of the second blade 211 includes a rotational velocity component Δu1. The first blade 111, like the second blade 211, will deflect the inflowing fumes in the opposite direction Δu2. The two deflection amounts are equal, i.e., Δu1 = Δu2. When the fumes flow out of the first blade 111, they still maintain the axial direction, i.e., u1 = u3. Thus, without the guide vanes, the exhaust power device 100 of this embodiment can recover rotational kinetic energy and reduce the loss of total pressure.
[0055] Compared to existing two-stage axial flow fans, the exhaust power unit 100 of this disclosure embodiment does not require additional guide vanes, making its structure compact and its cost lower. Furthermore, the first blade assembly 11 and the second blade assembly 21, with opposite arrangement and rotation directions, cooperate to avoid airflow friction losses on existing guide vanes, reducing internal resistance losses and improving the working efficiency of the exhaust power unit 100. In high-resistance operating environments, the exhaust power unit 100 of this disclosure embodiment exhibits low vibration and low noise, achieving quiet operation of the fume treatment device 1000 and effectively improving the user experience.
[0056] Compared with traditional single axial flow fans, the exhaust power unit 100 of the present disclosure can provide higher total pressure and a wider flow range for high-efficiency operation under the same flow conditions. This means that using the exhaust power unit 100 in the fume treatment device 1000 can effectively improve the exhaust efficiency. Especially when facing complex or long-distance exhaust duct systems, it can better overcome resistance and ensure smooth exhaust of fumes.
[0057] Combination Figures 1-3 The structure of the first fan system 10 is described below, such as... Figures 1-3 As shown, the first blade assembly 11 also includes a first connecting shaft 112. Multiple first blades 111 surround the first connecting shaft 112 and are fixedly connected to it. The first fan system 10 also includes a first motor 12. The first connecting shaft 112 and the first motor 12 are coaxially fixed. The first motor 12 drives the first connecting shaft 112 to rotate, thereby enabling the synchronous rotation of the multiple first blades 111. The first fan system 10 has a simple structure, facilitating rapid assembly of the first blade assembly 11 and the first motor 12. It should be noted that the first connecting shaft 112 and the first blades 111 can be fixed by assembly, or they can be integrally formed through processes such as injection molding or casting.
[0058] like Figure 1 , Figure 2 and Figure 6 As shown, the first fan system 10 also includes a first sleeve 13, which is sleeved on the outer periphery of the first blade assembly 11. The first sleeve 13 can achieve a better smoke collection effect for oil fumes, and can guide a large amount of oil fumes to the first blade assembly 11, thereby improving the oil fume extraction effect of the oil fume treatment device 1000.
[0059] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the first fan system 10 also includes a first mounting bracket 15, wherein the first motor 12 and the first sleeve 13 are fixed together by the first mounting bracket 15. By setting the first mounting bracket 15, a stable connection between the first motor 12 and the first sleeve 13 can be achieved, ensuring the stable and normal use of the first motor 12.
[0060] Of course, the first sleeve can be fixed to the main unit chassis by a mounting part (not shown in the figure), thereby achieving a stable connection between the first sleeve and the main unit chassis.
[0061] like Figure 1 , Figure 2 and Figure 6As shown, along the flow direction of the oil fumes, the cross-sectional area of the first sleeve 13 decreases, thereby achieving a better collection effect of the first sleeve 13 on the oil fumes and improving the oil fume absorption effect of the oil fume treatment device 1000.
[0062] Specifically, such as Figure 6 As shown, the first sleeve 13 includes a first section 131 and a second section 132 that are connected to each other. The first section 131 and the second section 132 are arranged sequentially along the flow direction of the fumes. The cross-sectional area of the first section 131 gradually decreases along the flow direction of the fumes; the first section 131 serves as a guide section, guiding the fumes into the first blade assembly 11. The cross-sectional area of the second section 132 does not change along the flow direction of the fumes; the second section 132 is used to collect the fumes and guide the filtered gas to... Figure 1 and Figure 2 The outlet 2101 of the fume treatment device 1000 shown.
[0063] like Figures 1-3 As shown, the first fan system 10 also includes a first silencer 14. The first silencer 14 is arranged around the outer periphery of multiple first blades 111 and is fixedly connected to the first blades 111. Due to the arrangement of the first silencer 14, the noise generated by the first blade assembly 11 during operation can be effectively reduced.
[0064] Specifically, such as Figures 1-3 As shown, the first noise-reducing cover 14 includes a first noise-reducing cover body 141 and a first noise-reducing hole 142 formed thereon. The first noise-reducing hole 142 effectively absorbs noise generated during the operation of the first blade assembly 11. This type of first noise-reducing cover 14 has a simple structure and low cost. Furthermore, the first noise-reducing cover 14 can be made of noise-reducing materials such as damping sound insulation felt, sound insulation coating, vibration damping sound insulation board, and aluminum foam. All materials capable of absorbing or reflecting noise are within the protection scope of this disclosure embodiment.
[0065] like Figures 1-3 As shown, the plurality of first blades 111 include first long blades 1111 and first short blades 1112. The first long blades 1111 and the first short blades 1112 are arranged alternately along the circumference of the first blade assembly 11. The first dimension L1 of the first long blade 1111 along the radial direction of the first blade assembly 11 is greater than the second dimension L2 of the first short blade 1112 along the radial direction of the first blade assembly 11. Through the alternating arrangement of the first long blades 1111 and the first short blades 1112, the formation of eddies in the first sleeve 13 can be suppressed, the formation of a low-speed zone inside the first sleeve 13 can be avoided, the friction loss between the oil fumes in the first sleeve 13 and the first blades 111 can be reduced, and the oil fumes in the first sleeve 13 can always have good kinetic energy, so that the oil fumes in the first sleeve 13 can be discharged smoothly from the outlet 2101.
[0066] like Figure 3 As shown, the outer end of the first short blade 1112 is fixedly connected to the first silencer 14. On the one hand, it can release the flow space near the blade root of the first short blade 1112. On the other hand, it can utilize the space at the blade tip of the first short blade 1112 to improve the work capacity of the first fan system 10.
[0067] like Figure 3 As shown, the first long blade 1111 and the first short blade 1112 are twisted to achieve a degree of torsion, which greatly improves the working efficiency of the exhaust power device 100. The first blade assembly 11 increases the flow rate of oil fumes, improves the high air volume and air pressure of the exhaust power device 100, and enhances the oil fume extraction effect of the exhaust power device 100. Among them, as... Figure 3 As shown, the ratio of the torsion of the first short blade 1112 to the torsion of the first long blade 1111 is greater than or equal to 1 / 6 and less than or equal to 2 / 3, further improving the high air volume and air pressure of the exhaust power device 100, and further improving the fume extraction effect of the exhaust power device 100. The ratio of the torsion of the first short blade 1112 to the torsion of the first long blade 1111 can be 1 / 6, 1 / 3, 1 / 2, 2 / 3, etc., and all point values or range values within the range of greater than or equal to 1 / 6 and less than or equal to 2 / 3 are within the protection scope of this disclosure embodiment.
[0068] Combination Figure 1 , Figure 2 and Figure 4 The structure of the second fan system 20 is described below, such as... Figure 1 , Figure 2 and Figure 4 As shown, the second blade assembly 21 also includes a second connecting shaft 212. Multiple second blades 211 surround the second connecting shaft 212 and are fixedly connected to it. The second fan system 20 also includes a second motor 22, with the second connecting shaft 212 and the second motor 22 coaxially fixed. The second motor 22 drives the second connecting shaft 212 to rotate, thereby enabling the synchronous rotation of the multiple second blades 211. The structure is simple and facilitates rapid assembly of the second blade assembly 21 and the second motor 22. It should be noted that the second connecting shaft 212 and the second blades 211 can be fixed by assembly, or they can be integrally formed through processes such as injection molding or casting.
[0069] like Figure 1 , Figure 2 and Figure 7As shown, the second fan system 20 also includes a second sleeve 23, which is sleeved on the outer periphery of the second blade assembly 21. The second sleeve 23 can achieve a better smoke collection effect for oil fumes, and can divert a large amount of oil fumes to the second blade assembly 21, thereby improving the smoke absorption effect of the oil fume treatment device 1000.
[0070] like Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, the second fan system 20 also includes a second mounting bracket 25, wherein the second motor 22 and the second sleeve 23 are fixed together by the second mounting bracket 25. The second mounting bracket 25 enables a stable connection between the second motor 22 and the second sleeve 23, ensuring the stable and normal use of the second motor 22.
[0071] like Figure 1 and Figure 7 As shown, the second sleeve 23 is fixed to the main unit 210 by the third mounting bracket 26, thereby achieving a stable connection between the second sleeve 23 and the main unit 210.
[0072] like Figure 1 , Figure 2 and Figure 7 As shown, along the flow direction of the oil fumes, the cross-sectional area of the second sleeve 23 decreases. The second sleeve 23 can effectively collect the oil fumes and improve the oil fume extraction effect of the oil fume treatment device 1000.
[0073] Specifically, such as Figure 7 As shown, the second sleeve 23 includes a third section 231, a fourth section 232, a fifth section 233, and a sixth section 234 that are connected to each other. These sections are arranged sequentially along the direction of the oil fume flow. (The last sentence appears to be incomplete and possibly refers to a different configuration.) Figure 7 As shown, the third section 231 is a horn-shaped constriction section, used to gather airflow. The fourth section 232 is a guide section, guiding airflow into the second blade assembly 21. The fifth section 233 is a straight section, used to gather airflow and guide it to the first sleeve 13. The sixth section 234 is a contraction section, which accelerates the fumes entering the first sleeve 13.
[0074] like Figure 1 and Figure 2As shown, the first blade assembly 11 is located above the second sleeve 23, and the first sleeve 13 is spaced apart on the outer periphery of the second sleeve 23. In addition to entering the first fan system 10 through the second fan system 20, the oil fumes can also enter the first fan system 10 through the gap between the first sleeve 13 and the second sleeve 23, thereby improving the oil fume absorption of the second fan system 20 and improving the oil fume absorption effect of the exhaust power device 100.
[0075] like Figure 1 , Figure 2 as well as Figure 4 As shown, the second fan system 20 also includes a second silencer 24. The second silencer 24 surrounds the outer periphery of the plurality of second blades 211 and is fixedly connected to the second blades 211. Due to the setting of the second silencer 24, the noise generated by the second blade assembly 21 during operation can be effectively reduced.
[0076] Specifically, such as Figure 1 , Figure 2 as well as Figure 4 As shown, the second noise-reducing cover 24 includes a second noise-reducing cover body 241 and a second noise-reducing hole 242 formed thereon. The second noise-reducing hole 242 effectively absorbs noise generated during the operation of the second blade assembly 21. This type of second noise-reducing cover 24 has a simple structure and low cost. Furthermore, the second noise-reducing cover 24 can be made of noise-reducing materials such as damping sound insulation felt, sound insulation coating, vibration damping sound insulation board, and aluminum foam. All materials capable of absorbing or reflecting noise are within the protection scope of this disclosure embodiment.
[0077] like Figure 1 , Figure 2 as well as Figure 4 As shown, the multiple second blades 211 include second long blades 2111 and second short blades 2112. The second long blades 2111 and the second short blades 2112 are arranged alternately along the circumference of the second blade assembly 21. The third dimension L3 of the second long blade 2111 along the radial direction of the second blade assembly 21 is greater than the fourth dimension L4 of the second short blade 2112 along the radial direction of the second blade assembly 21. Through the alternating arrangement of the second long blades 2111 and the second short blades 2112, the formation of vortices in the second sleeve 23 can be suppressed, the formation of a low-speed zone inside the second sleeve 23 can be avoided, the friction loss between the oil fumes in the second sleeve 23 and the second blades 211 can be reduced, and the oil fumes in the second sleeve 23 can always have good kinetic energy, so that the oil fumes in the second sleeve 23 can be discharged more smoothly to the first sleeve 13.
[0078] like Figure 4As shown, the outer end of the second short blade 2112 is fixedly connected to the second silencer 24. On the one hand, it can release the flow space near the blade root of the second short blade 2112. On the other hand, it can utilize the space at the blade tip of the second short blade 2112 to improve the work capacity of the second fan system 20.
[0079] like Figure 4 As shown, the second long blade 2111 and the second short blade 2112 are twisted to achieve a degree of twist, which greatly improves the working efficiency of the exhaust power device 100. The second blade assembly 21 increases the flow rate of oil fumes, improves the high air volume and air pressure of the exhaust power device 100, and enhances the oil fume extraction effect of the exhaust power device 100. For example, Figure 4 As shown, the ratio of the torsion of the second short blade 2112 to the torsion of the second long blade 2111 is greater than or equal to 1 / 6 and less than or equal to 2 / 3, further improving the high air volume and air pressure of the exhaust power device 100, and further improving the fume extraction effect of the exhaust power device 100. The ratio of the torsion of the second short blade 2112 to the torsion of the second long blade 2111 can be 1 / 6, 1 / 3, 1 / 2, 2 / 3, etc., and all point values or range values within the range of greater than or equal to 1 / 6 and less than or equal to 2 / 3 are within the protection scope of this disclosure embodiment.
[0080] like Figure 3 and Figure 4 As shown, the number of first blades 111 and the number of blades in the second blade 211 are coprime, further reducing the number of blades as shown. Figure 1 and Figure 2 Discrete noise of the exhaust power unit 100 shown.
[0081] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A smoke exhaust power device, characterized in that, include: The first wind turbine system (10) includes a first blade assembly (11) including a plurality of first blades (111) arranged along a first rotation direction M. as well as The second wind turbine system (20) includes a second blade assembly (21), which is coaxially arranged with the first blade assembly (11). The second blade assembly (21) includes a plurality of second blades (211) arranged along a second rotation direction N. The first rotation direction M is opposite to the second rotation direction N, and the first rotation direction Q of the first blade assembly (11) is opposite to the second rotation direction T of the second blade assembly (21). The plurality of first blades (111) include a first long blade (1111) and a first short blade (1112), the first long blade (1111) and the first short blade (1112) being arranged alternately along the circumference of the first blade assembly (11), the first dimension L1 of the first long blade (1111) along the radial direction of the first blade assembly (11) being greater than the second dimension L2 of the first short blade (1112) along the radial direction of the first blade assembly (11); and / or The plurality of second blades (211) include a second long blade (2111) and a second short blade (2112), the second long blade (2111) and the second short blade (2112) being arranged alternately along the circumference of the second blade assembly (21), the third dimension L3 of the second long blade (2111) along the radial direction of the second blade assembly (21) being greater than the fourth dimension L4 of the second short blade (2112) along the radial direction of the second blade assembly (21).
2. The smoke exhaust power device according to claim 1, characterized in that, The first blade assembly (11) further includes a first connecting shaft (112), and a plurality of the first blades (111) are arranged around the outer periphery of the first connecting shaft (112) and fixedly connected to the first connecting shaft (112). The first fan system (10) further includes a first motor (12), and the first connecting shaft (112) is coaxially fixed to the first motor (12); and / or The second blade assembly (21) further includes a second connecting shaft (212), and a plurality of second blades (211) are arranged around the outer periphery of the second connecting shaft (212) and fixedly connected to the second connecting shaft (212). The second fan system (20) further includes a second motor (22), and the second connecting shaft (212) is coaxially fixed with the second motor (22).
3. The smoke exhaust power device according to claim 2, characterized in that, The first fan system (10) also includes a first sleeve (13), which is sleeved on the outer periphery of the first blade assembly (11).
4. The smoke exhaust power device according to claim 3, characterized in that, The second fan system (20) also includes a second sleeve (23), which is fitted around the outer periphery of the second blade assembly (21).
5. The smoke exhaust power device according to claim 4, characterized in that, Along the direction of oil fume flow, the cross-sectional area of the first sleeve (13) decreases; and / or Along the direction of the flow of oil fumes, the cross-sectional area of the second sleeve (23) tends to decrease.
6. The smoke exhaust power device according to claim 4, characterized in that, The first blade assembly (11) is located above the second sleeve (23), and the first sleeve (13) is spaced around the outer periphery of the second sleeve (23).
7. The smoke exhaust power device according to claim 2, characterized in that, The first fan system (10) also includes a first silencer (14), which surrounds and is fixedly connected to the first blades (111) of the plurality of first blades (111); and / or The second fan system (20) also includes a second silencer (24), which surrounds the outer periphery of the plurality of second blades (211) and is fixedly connected to the second blades (211).
8. The smoke exhaust power device according to claim 1, characterized in that, The first long blade (1111) and the first short blade (1112) are twisted to have a degree of twist, and the ratio of the degree of twist of the first short blade (1112) to the degree of twist of the first long blade (1111) is greater than or equal to 1 / 6 and less than or equal to 2 / 3; and / or The second long blade (2111) and the second short blade (2112) are twisted to have a degree of twist, and the ratio of the degree of twist of the second short blade (2112) to the degree of twist of the second long blade (2111) is greater than or equal to 1 / 6 and less than or equal to 2 / 3.
9. An oil fume treatment device, comprising a housing (200), wherein the housing (200) has a smoke inlet (2201), characterized in that, The fume treatment device further includes a fume exhaust power device as described in any one of claims 1 to 8, wherein the fume exhaust power device is disposed inside the housing (200), and the fume inlet (2201), the second fan system (20) and the first fan system (10) are arranged sequentially along the flow direction of the fume.