Fan

Abstract

The utility model relates to the field of fans, in particular to a fan. The fan comprises a volute assembly which is provided with a containing cavity, an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the containing cavity. The driving mechanism is at least partially located in the containing cavity and comprises an impeller, a lining, an inner shell and a driving assembly, the lining is located between the impeller and the inner shell and divides the containing cavity into a first cavity and a second cavity which are communicated, the impeller is located in the first cavity and arranged opposite to the air inlet, the inner shell is located in the second cavity, and the driving assembly penetrates through the inner shell and is located in the first cavity; the driving assembly comprises a rotating shaft with one end penetrating through the inner shell, and the rotating shaft is sleeved with the impeller and the lining. The lower cover body is connected with the side, away from the air inlet, of the volute assembly and connected with the end, away from the impeller, of the rotating shaft. The fan can effectively reduce the running noise of the fan.

Description

Technical Field

[0001] This application relates to the field of wind turbine technology, and in particular to a wind turbine. Background Technology

[0002] Fans are widely used in industrial production, household appliances, and medical fields, but the noise they generate during operation has always been a significant problem for users and equipment manufacturers. With increasing environmental protection requirements and growing user demands for comfort, research into fan noise reduction technology is receiving increasing attention.

[0003] Currently, scholars and enterprises both domestically and internationally have developed various noise reduction technologies, including improving blade design, optimizing airflow channels, and using sound-absorbing materials. Improving blade design involves changing the shape, number, or angle of the blades to reduce eddy noise, but this may lead to a decrease in airflow or an increase in energy consumption. Optimizing airflow channels involves installing guide vanes or diffusers at the inlet and outlet of the fan to reduce airflow noise, but this increases structural complexity and maintenance difficulty. Encasing the fan with sound-absorbing materials involves laying sound-absorbing materials (such as foam, fibers, etc.) inside the fan casing or ducts, which can absorb some noise, but may affect heat dissipation or increase volume.

[0004] Therefore, existing noise reduction technologies generally suffer from the problem of not being able to balance noise reduction effect with fan performance. Some technologies also significantly increase cost or structural complexity, making it difficult to meet the needs of practical applications. Utility Model Content

[0005] The purpose of this application is to overcome the above-mentioned technical problems and provide a fan with the following solution:

[0006] A fan includes: a volute assembly having a receiving cavity and an air inlet and an air outlet communicating with the receiving cavity; a drive mechanism, at least partially located in the receiving cavity, and including an impeller, a bushing, an inner shell, and a drive assembly, the bushing being located between the impeller and the inner shell, dividing the receiving cavity into a first cavity and a second cavity that are connected, the impeller being located in the first cavity and disposed opposite to the air inlet, the inner shell being located in the second cavity, the drive assembly passing through the inner shell, and the drive assembly including a rotating shaft with one end penetrating through the inner shell, the impeller and the bushing being sleeved on the rotating shaft; and a lower cover connected to the side of the volute assembly away from the air inlet and connected to the end of the rotating shaft away from the impeller.

[0007] By adopting the above technical solution, the housing cavity of the volute assembly provides installation space for the drive mechanism. The air inlet and outlet are connected to the housing cavity, enabling air to enter and exit. The bushing located between the impeller and the inner shell divides the housing cavity into a first cavity and a second cavity, which helps to isolate airflow and vibration in different parts and reduce noise caused by mutual interference. The impeller is positioned in the first cavity relative to the air inlet, which can more efficiently draw in airflow and stabilize the airflow path to reduce noise caused by unstable airflow. The rotating shaft of the drive assembly passes through the inner shell, ensuring the stability of the drive and reducing noise caused by shaking or eccentricity. The lower cover is connected to the side of the volute assembly away from the air inlet and to the end of the rotating shaft away from the impeller, which serves to seal and fix the rotating shaft, ensuring the stability of the fan structure and preventing noise caused by shaking of the rotating shaft.

[0008] Optionally, the drive assembly further includes: a wire frame sleeved on the rotating shaft; an iron core sleeved on the wire frame; a first bearing sleeved at one end of the rotating shaft, located between the wire frame and the bushing; a second bearing sleeved at the other end of the rotating shaft, located between the wire frame and the lower cover; and an elastic element, one end of which abuts against the second bearing and the other end of which abuts against the lower cover, wherein the lower cover is provided with a first receiving groove corresponding to the elastic element.

[0009] By adopting the above technical solution, the wire frame sleeved on the rotating shaft can serve as a carrier for the iron core installation, facilitating the arrangement of the iron core; the iron core sleeved on the wire frame, in conjunction with the rotating shaft, enables electromagnetic conversion to drive the impeller to rotate; the first bearing sleeved on one end of the rotating shaft and located between the wire frame and the bushing can reduce the frictional resistance between the rotating shaft and other components, ensuring rotational flexibility; the second bearing sleeved on the other end of the rotating shaft and located between the wire frame and the lower cover also plays a role in reducing frictional resistance; one end of the elastic element abuts against the second bearing, and the other end abuts against the lower cover, and the lower cover is correspondingly provided with a first receiving groove, which can buffer the vibration generated by the rotating shaft and reduce the operating noise of the equipment; the lower cover abuts against the rotating shaft through the elastic element, playing a supporting and protective role.

[0010] Optionally, the inner shell is provided with a second receiving groove for the rotating shaft to pass through and at least one first ring groove provided on the inner wall of the second receiving groove; the drive assembly further includes a first washer sleeved on the outside of the first bearing and located in the first ring groove.

[0011] By adopting the above technical solution, the inner shell is provided with a first receiving groove and a first ring groove, and a first washer sleeved on the outside of the first bearing and located in the first ring groove, which can improve the stability of the rotating shaft passing through the inner shell.

[0012] Optionally, a second groove is provided on the inner wall of the first receiving groove; the drive assembly further includes a second washer sleeved on the outside of the second bearing and located in the second groove.

[0013] By adopting the above technical solution, a second groove is provided on the inner wall of the first receiving groove. A second washer, fitted outside the second bearing and located in the second groove, can improve the stability of the connection between the rotating shaft and the lower cover, thereby reducing noise generated by component vibration during fan operation and enhancing the fan's noise reduction effect.

[0014] Optionally, the inner diameter of the volute assembly is set to 40mm-58mm; the outer diameter of the bushing is set to 32mm-51mm; and the outer diameter of the impeller is set to 32mm-48mm.

[0015] By adopting the above technical solution, setting the inner diameter of the volute assembly to 51 mm-54 mm, the outer diameter of the bushing to 45 mm-49 mm, and the outer diameter of the impeller to 42 mm-48 mm, the dimensions of each component can be rationally planned, the internal space layout of the fan can be optimized, the operating efficiency of the fan can be improved, and the noise generated during the operation of the fan can be reduced.

[0016] Optionally, it also includes: a sealing ring, fitted onto the end of the inner shell away from the bushing, and the inner shell abutting against the volute assembly via the sealing ring.

[0017] By adopting the above technical solution, a sealing ring is added to the end of the inner shell away from the bushing, so that the inner shell abuts against the volute assembly through the sealing ring, which enhances the sealing between the inner shell and the volute assembly, reduces gas leakage, and improves the working efficiency of the fan.

[0018] Optionally, it also includes: a wire assembly for connecting the drive assembly, and the volute assembly and the inner shell are respectively provided with grooves for the wire assembly to pass through.

[0019] By adopting the above technical solution, the wire assembly can be used to connect drive components to realize power transmission or signal transmission. The grooves on the volute assembly and inner shell corresponding to the wire assembly can provide a specific installation path for the wire assembly, avoiding the mess and interference problems caused by random wire assembly arrangement, which is conducive to the regularity and stability of the structure.

[0020] Optionally, the volute assembly is provided with a plurality of support columns spaced apart.

[0021] By adopting the above technical solution, the multiple support columns spaced apart on the volute assembly facilitate the installation of the fan.

[0022] Optionally, the outer peripheral side of the volute assembly is provided with a plurality of protrusions at intervals.

[0023] By adopting the above technical solution, multiple protrusions are spaced apart on the outer periphery of the volute assembly, which helps to improve the overall structural strength and stability of the fan and reduce the risk of damage caused by vibration or external impact.

[0024] Optionally, the bushing and the inner shell are respectively provided with first fixing holes for screw fixing, and the lower cover and the volute assembly are respectively provided with second fixing holes for screw fixing.

[0025] By adopting the above technical solution, the bushing and inner shell can be fixed with screws through the corresponding first fixing holes, making the connection between the bushing and inner shell more stable. The lower cover and the volute assembly are fixed with screws through the corresponding second fixing holes, which allows the lower cover to be firmly installed on the volute assembly. In this way, the integrity and stability of the fan can be guaranteed, and additional noise or disruption to normal operation of the structure due to loose parts can be avoided.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By setting a bushing to divide the accommodating cavity into a first cavity and a second cavity, the internal airflow channel can be optimized to reduce airflow noise and avoid the increased structural complexity and maintenance difficulty caused by complex external airflow guiding structures.

[0028] 2. The elastic element is set so that one end abuts against the second bearing and the other end abuts against the lower cover, and the lower cover is provided with a corresponding first receiving groove, which can buffer the vibration generated by the rotating shaft and reduce the operating noise of the equipment; the lower cover abuts against the rotating shaft through the elastic element, which can play a supporting and protective role.

[0029] 3. By providing a second receiving groove and a first ring groove on the inner shell, and cooperating with a first washer that is fitted with a first bearing and located in the first ring groove, the stability of the rotating shaft passing through the inner shell can be improved; by providing a first receiving groove and a second ring groove on the lower cover, and cooperating with a second washer that is fitted with a second bearing and located in the second ring groove, the stability of the connection between the rotating shaft and the lower cover can be improved, thereby reducing the noise generated by component shaking during the operation of the fan and improving the noise reduction effect of the fan.

[0030] 4. By rationally setting the dimensions of the volute assembly, bushing, and impeller, noise reduction can be achieved while ensuring fan performance, thus balancing noise reduction and fan performance. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of a fan disclosed in an embodiment of this application;

[0032] Figure 2 for Figure 1 A publicly disclosed exploded structural diagram of a wind turbine;

[0033] Figure 3 for Figure 1 A schematic diagram of a cross-sectional structure of a wind turbine;

[0034] Figure 4 for Figure 1 A publicly disclosed exploded structural diagram of a wind turbine;

[0035] Figure 5 for Figure 2 An exploded schematic diagram of a portion of the drive mechanism in a wind turbine;

[0036] Figure 6 for Figure 2 A schematic diagram of the drive mechanism in a wind turbine is disclosed.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Volute assembly; 101. Receiving cavity; 1011. First cavity; 1012. Second cavity; 102. Air inlet; 103. Air outlet; 104. Support column; 105. Protrusion; 20. Drive mechanism; 21. Impeller; 22. Bushing; 221. First fixing hole; 23. Inner shell; 231. Second receiving groove; 232. First ring groove; 233. Groove; 24. Drive assembly; 241. Rotating shaft; 242. Wire frame; 243. Iron core; 244. First bearing; 245. Second bearing; 246. Elastic element; 247. First washer; 248. Second washer; 30. Lower cover; 31. First receiving groove; 32. Second ring groove; 33. Second fixing hole; 40. Sealing ring; 50. Wire assembly. Detailed Implementation

[0039] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this application refers to and includes any or all possible combinations of one or more of the listed items.

[0040] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0041] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0042] See Figure 1 , Figure 2 and Figure 3The present application discloses a fan, which includes: a volute assembly 10, a drive mechanism 20 and a lower cover 30.

[0043] The volute assembly 10 includes a receiving cavity 101 with an air inlet 102 and an air outlet 103 communicating with it. The air inlet 102 is circular, ensuring smooth airflow into the fan. Multiple support columns 104 are provided on one side of the volute assembly 10. These support columns can be cylindrical, prismatic, or other shapes, facilitating fan fixation. Multiple protrusions 105 are provided on the outer periphery of the volute assembly 10 to strengthen the structure, distribute stress, and reduce resonance on the volute surface, thereby lowering noise.

[0044] See Figure 2 and Figure 3 The drive mechanism 20 is located in the accommodating cavity 101 and includes an impeller 21, a bushing 22, an inner shell 23, and a drive assembly 24. The bushing 22 is located between the impeller 21 and the inner shell 23, or is fitted onto the inner shell 23 near the impeller 21, dividing the accommodating cavity 101 into a first cavity 1011 and a second cavity 1012. A certain gap exists between the bushing 22 and the inner wall of the volute assembly 10, allowing the first cavity 1011 and the second cavity 1012 to communicate through this gap. The impeller 21 is located in the first cavity 1011, positioned opposite the air inlet 102. The impeller 21 consists of multiple arc-shaped blades, which drive airflow when rotating to generate wind. The inner shell 23 is located in the second cavity 1012 and is sleeve-shaped, used to fit the drive assembly 24, i.e., to allow the drive assembly 24 to pass through it, providing a relatively stable installation environment for the drive assembly 24.

[0045] See Figure 4 and Figure 5 The drive assembly 24 includes a rotating shaft 241, a wire frame 242, an iron core 243, a first bearing 244, a second bearing 245, and an elastic element 246. One end of the rotating shaft 241 is used to pass through the inner shell 23, through which the bushing 22 and the impeller 21 are sequentially passed. The other end is used to fix it to the volute assembly 10. The impeller 21 rotates with the rotation of the rotating shaft 241. At least one first fixing hole 221 is provided on both the bushing 22 and the inner shell 23. The bushing 22 and the inner shell 23 are fixed together by screws passing through the corresponding first fixing holes 221 on both sides, ensuring the stability of their relative positions. The bushing 22 and the inner shell 23 can also be integrally formed.

[0046] The wire frame 242 is made of insulating materials such as plastic and resin, and its function is to fix and support the iron core 243. The iron core 243 is sleeved on the wire frame 242, and the iron core 243 is made of magnetic materials such as silicon steel to enhance the electromagnetic induction effect, thereby driving the rotating shaft 241 to rotate.

[0047] The first bearing 244 is disposed inside the inner shell 23, between the wire frame 242 and the bushing 22, and is sleeved on the end of the rotating shaft 241 near the impeller 21. The first bearing 244 can be a ball bearing, a sliding bearing, etc., and its function is to reduce friction and wear on the rotating shaft 241. The second bearing 245 is sleeved on the end of the rotating shaft 241 near the lower cover 30 and fixed on the lower cover 30, and is disposed between the wire frame 242 and the lower cover 30, and also serves to reduce friction and wear.

[0048] See Figure 4 and Figure 6 The elastic element 246 is a spring, with one end abutting against the second bearing 245 and the other end abutting against the lower cover 30. The lower cover 30 covers the end of the volute assembly 10 away from the air inlet 102. The lower cover 30 is provided with a first receiving groove 31 corresponding to the elastic element 246 to ensure the stability of the installation of the elastic element 246. At the same time, the setting of the elastic element 246 can absorb the vibration of the rotating shaft 241, thereby reducing noise.

[0049] Further, see Figure 3 and Figure 4 The inner shell 23 is provided with a second receiving groove 231 and at least one first ring groove 232. The second receiving groove 231 is provided for the rotating shaft 241 to pass through and be received. The first ring groove 232 is formed on the side wall of the second receiving groove 231. The corresponding drive assembly 24 also includes a first washer 247, which is used to be sleeved on the first bearing 244 and received in the first ring groove 232. In this embodiment, two first ring grooves 232 and two first washers 247 are provided in a one-to-one correspondence. The first washer 247 can be made of materials such as rubber or plastic to further reduce the friction and noise between the rotating shaft 241 and the inner shell 23 when the drive assembly 24 is running.

[0050] Additionally, a second groove 32 is provided on the lower cover 30, which is formed on the side wall of the first receiving groove 31. The corresponding drive assembly 24 also includes a second washer 248, which is used to fit on the second bearing 245 and is located in the second groove 32. The provision of the second washer 248 can reduce friction and noise between the rotating shaft 241 and the lower cover 30.

[0051] Further, see Figure 4The lower cover 30 and the volute assembly 10 are each provided with at least one second fixing hole 33. By passing screws through the corresponding second fixing holes 33 on the lower cover 30 and the volute assembly 10, the lower cover 30 can be firmly fixed to the volute assembly 10 to ensure the integrity and stability of the fan and avoid additional noise or affecting the normal operation of the structure due to loose parts.

[0052] Additionally, see Figure 1 and Figure 4 The fan also includes a wire assembly 50, which is used to connect the drive assembly 24. The volute assembly 10 and the inner shell 23 are respectively provided with grooves 233 for the wire assembly 50 to pass through. The design of the grooves 233 facilitates the arrangement of the wire assembly 50, avoids the wire assembly 50 from being messy, and also reduces the friction between the wire assembly 50 and other components.

[0053] Furthermore, it's worth mentioning that this design aims to prevent air leakage, improve fan efficiency, and reduce noise caused by air leakage. (See also...) Figure 3 The fan also includes a sealing ring 40, which is fitted onto the end of the inner shell 23 away from the bushing 22, and the inner shell 23 abuts against the volute assembly 10 via the sealing ring 40. The sealing ring 40 can be made of elastic materials such as rubber.

[0054] For example, in this embodiment, the inner diameter of the volute assembly is set to 40mm-58mm, the outer diameter of the bushing is set to 32mm-51mm, and the outer diameter of the impeller is set to 32mm-48mm. This design allows for better planning of the dimensions of each component, optimizes the internal space layout of the fan, improves the operating efficiency of the fan, and helps reduce the noise generated during fan operation.

[0055] The implementation principle of this embodiment is as follows: The volute assembly 10, with its accommodating cavity 101, provides a stable installation environment for the drive mechanism 20, reducing the impact of external factors on the drive mechanism 20. The arrangement of components such as the bushing 22, bearings, washers, and elastic element 246 in the drive mechanism 20, especially the bushing 22 dividing the accommodating cavity 101 into a first cavity 1011 and a second cavity 1012, optimizes the internal airflow channel to reduce airflow noise. Furthermore, the elastic element 246, with one end abutting against the second bearing 245 and the other end against the lower cover 30, buffers the vibration generated by the rotating shaft 241, reducing equipment operating noise. The lower cover 30 and the sealing ring 40 further enhance the sealing and stability of the structure, preventing air leakage and noise generation.

[0056] The structural design of this application has been improved to address the shortcomings of traditional fan structures. Compared with existing technologies, it greatly reduces the noise generated during fan operation, improves fan performance and the comfort of the operating environment, and is suitable for places with high noise requirements, such as hospitals and laboratories. It has strong practicality and market competitiveness.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A fan, characterized in that, include: The volute assembly (10) has a receiving cavity (101) and is provided with an air inlet (102) and an air outlet (103) communicating with the receiving cavity (101). The drive mechanism (20) is located at least partially in the accommodating cavity (101) and includes an impeller (21), a bushing (22), an inner shell (23), and a drive assembly (24). The bushing (22) is located between the impeller (21) and the inner shell (23), dividing the accommodating cavity (101) into a first cavity (1011) and a second cavity (1012) that are connected. The impeller (21) is located in the first cavity (1011) and is disposed opposite to the air inlet (102). The inner shell (23) is located in the second cavity (1012). The drive assembly (24) passes through the inner shell (23) and includes a rotating shaft (241) with one end penetrating through the inner shell (23). The impeller (21) and the bushing (22) are sleeved on the rotating shaft (241). The lower cover (30) is connected to the side of the volute assembly (10) away from the air inlet (102) and to the end of the rotating shaft (241) away from the impeller (21).

2. The fan according to claim 1, characterized in that, The driving component (24) also includes: A wire frame (242) is sleeved on the rotating shaft (241); The iron core (243) is sleeved on the wire frame (242); The first bearing (244) is sleeved on one end of the rotating shaft (241) and located between the wire frame (242) and the bushing (22); The second bearing (245) is sleeved on the other end of the rotating shaft (241) and located between the wire frame (242) and the lower cover (30); The elastic element (246) abuts against the second bearing (245) at one end and against the lower cover (30) at the other end. The lower cover (30) is provided with a first receiving groove (31) corresponding to the elastic element (246).

3. The fan according to claim 2, characterized in that, The inner shell (23) is provided with a second receiving groove (231) through which the rotating shaft (241) passes and at least one first ring groove (232) provided on the inner wall of the second receiving groove (231). The drive assembly (24) also includes a first washer (247) sleeved on the outside of the first bearing (244) and located in the first ring groove (232).

4. The fan according to claim 3, characterized in that, A second groove (32) is provided on the inner wall of the first receiving groove (31); The drive assembly (24) also includes a second washer (248) sleeved on the outside of the second bearing (245) and located in the second groove (32).

5. The fan according to claim 1, characterized in that, The inner diameter of the volute assembly (10) is set to 40mm-58mm; The outer diameter of the bushing (22) is set to 32mm-51mm; The outer diameter of the impeller (21) is set to 32mm-48mm.

6. The fan according to claim 1, characterized in that, Also includes: A sealing ring (40) is fitted onto the end of the inner shell (23) away from the bushing (22), and the inner shell (23) abuts against the volute assembly (10) via the sealing ring (40).

7. The fan according to claim 1, characterized in that, Also includes: The wire assembly (50) is used to connect the drive assembly (24), and the volute assembly (10) and the inner shell (23) are respectively provided with grooves (233) for the wire assembly (50) to pass through.

8. The fan according to claim 1, characterized in that, The volute assembly (10) is provided with a plurality of support columns (104) spaced apart.

9. The fan according to claim 1, characterized in that, The outer periphery of the volute assembly (10) is provided with a plurality of protrusions (105) spaced apart.

10. The fan according to claim 1, characterized in that, The bushing (22) and the inner shell (23) are respectively provided with first fixing holes (221) for fixing by screws. The lower cover (30) and the volute assembly (10) are respectively provided with second fixing holes (33) that are fixed by screws.

Images