Blade Assembly and Fan Equipment

Abstract

To provide a fan blade assembly and a fan apparatus.SOLUTION: A fan blade assembly according to the present application includes: a primary fan blade, provided with multiple first blades circumferentially arranged; an auxiliary fan blade arranged coaxial and adjacent to the primary fan blade, the auxiliary fan blade provided with multiple second blades circumferentially arranged, where an air inlet direction of the auxiliary fan blade is an axial direction, an air outlet direction of the auxiliary fan blade is a radial direction, and the first blades and the second blades have different torsion directions; and a motor arranged on the side of the auxiliary fan blade that is away from the primary fan blade. The primary fan blade has a maximum outer diameter greater than the outer diameter of the auxiliary fan blade. In the present technical means, the maximum outer diameter of the primary fan blade is limited to be great and the outer diameter of the auxiliary fan blade is limited to be small. Therefore, when both blades simultaneously rotate under the driving of the motor, an effect of the auxiliary fan blade on the flow field of the primary fan blade is reduced to ensure flow efficiency and reduce noise.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This application relates to the technical field of fans, and more particularly to blade assemblies and fan equipment. [Background technology]

[0002] Conventionally, in the related art, the fan motor generates noise during operation, and when a user desires a quiet environment, the operation of the fan gives the user an annoying feeling, degrading the user's experience. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] In view of this, an embodiment of a first aspect of the present application provides a vane assembly.

[0005] An embodiment of a second aspect of the present application provides a fan apparatus.

[0006] In order to achieve the above object, a blade assembly provided by an embodiment of a first aspect of the present application includes a main blade having a plurality of first blades arranged in a circumferential direction, an auxiliary blade arranged coaxially adjacent to the main blade and having a plurality of second blades arranged in a circumferential direction, the first blade and the second blade having different twist directions, and a motor arranged on the side of the auxiliary blade away from the main blade, wherein the maximum outer diameter of the main blade is larger than the outer diameter of the auxiliary blade.

[0007] The blade assembly provided by the present application mainly includes a motor and two blades mounted on the same shaft, one of which is a main blade, which exhausts air to the front when rotating to ensure normal airflow, and the other is an auxiliary blade. During the normal rotation of the main blade to blow air, the twist directions of the first blade and the second blade are different, and the intake direction of the auxiliary blade is perpendicular to the exhaust direction, so that during the process of rotating in the same direction, the exhaust direction of the auxiliary blade is perpendicular to the intake direction, which belongs to a distributed radial exhaust, and can reduce the flow impact of the main blade and reduce noise. In addition, the main blade always blows air to the front, and the auxiliary blade generates negative pressure when rotating to make the air in the motor flow, and achieves a certain heat dissipation effect for the rear motor. That is, the main blade, the auxiliary blade and the motor are arranged in order along the axial direction, and the main blade blows air to the front when rotating, and the auxiliary blade controls the air flow around the motor by negative pressure when rotating, thereby accelerating heat dissipation near the motor and reducing the temperature rise of the motor. In addition, the main blade is provided with a plurality of first blades arranged in the circumferential direction, so that when the main blade rotates, the first blades continuously blow air to the front. Similarly, the auxiliary blade is provided with a plurality of second blades, so that when the auxiliary blade and the main blade rotate together, the auxiliary blade generates a radial airflow to increase the intake amount and increase the wind speed, and the airflow is divided by the auxiliary blades before being exhausted by the main blade, so that the exhaust air becomes finer and softer, improving the comfort of the user.

[0008] In addition, in the present application, by limiting the maximum outer diameter of the main blade to be large and the outer diameter of the auxiliary blade to be small, when they rotate together when driven by the motor, the rotation of the main blade, which mainly blows air, can better meet the user's needs for heat dissipation and air blowing, and the small-sized auxiliary blade can reduce the impact that the auxiliary blade has on the flow field of the main blade, ensure flow efficiency, and reduce noise.

[0009] In the above technical means, the auxiliary blade is provided on the intake side of the main blade.

[0010] In this technical means, the auxiliary blade is provided on the intake side of the main blade, so that when the main blade rotates, air flows from one side of the auxiliary blade to the main blade. In this case, since the twist directions of the first blade and the second blade are different, the opposite twist direction is adopted, which can effectively reduce the flow impact of the main blade. As a result, when the auxiliary blade and the main blade rotate together, the air blowing direction of the second blade is different from the air blowing direction of the first blade, and the auxiliary blade generates a radial airflow to increase the intake volume and increase the wind speed. The airflow is divided by the auxiliary blade and then exhausted by the main blade, so that the exhaust is finer and softer, improving user comfort.

[0011] Generally, the air blowing direction of the main blade is forward, and the intake side is the rear side of the main blade. By providing the auxiliary blade behind the main blade, after rotation, as the auxiliary blade rotates, the auxiliary blade provides supplementary intake air to the main blade, thereby increasing the amount of intake air and improving the wind speed.

[0012] In the above technical solution, the hub diameter of the main blade is larger than the maximum diameter of the auxiliary blade.

[0013] In this technical solution, the diameter of the auxiliary blade is limited to be smaller than the hub diameter of the main blade, thereby further reducing the influence of the auxiliary blade on the flow field of the main blade, thereby reducing the increase in noise caused by the influence of the flow field and improving the user experience.

[0014] In addition, the number of first blades is smaller than the number of second blades, and the number of first blades and the number of second blades are relatively prime. By limiting the numbers of first blades and second blades, i.e., the number of first blades is small and the numbers of the two types of blades are relatively prime, the overlap of fundamental frequencies can be effectively reduced and the generation of noise can be avoided.

[0015] With the above technical means, the transparency of the main blade is greater than 10%.

[0016] This technical solution limits the transparency of the main blades to semi-transparent or fully transparent, providing the user with a viewing window that makes it easier to intuitively observe the operating status inside the fan, and facilitating subsequent maintenance and replacement.

[0017] The above technical means further includes a motor shaft, which is provided on the motor, the main blades being transmission-connected to the motor shaft of the motor, and the auxiliary blades being transmission-connected to the motor shaft.

[0018] In this technical solution, a motor shaft is provided on the motor, and both the main blade and the auxiliary blade are transmission-connected to the motor shaft. When the motor shaft rotates, the main blade and the auxiliary blade are moved and rotated in the same direction. As a result, it is possible to balance the amount of air blown to the front by using only one motor, and the entire blade assembly can be made lighter and the number of parts reduced.

[0019] In the above technical means, a flat shaft portion is provided on the motor shaft, and the main blade realizes a transmission connection with the motor shaft via the flat shaft portion.

[0020] In this technical means, a flat shaft portion is provided on the motor shaft, and the main blade can realize the transmission connection by engaging with this portion. Specifically, the cross section of the flat shaft portion on the motor shaft can be D-shaped, X-shaped, or even any non-circular shape, and a hole of a corresponding shape is provided in the center of the main blade. By inserting the main blade into the flat shaft portion, when the motor shaft rotates, the main blade is moved and rotates together.

[0021] In the above technical means, a positioning shaft that protrudes outward in the radial direction is provided on the motor shaft, and a positioning groove that coincides with the positioning shaft is provided on the auxiliary blade, and circumferential positioning of the auxiliary blade is achieved by engagement between the positioning shaft and the positioning groove.

[0022] In this technical solution, a positioning shaft extending along the radial direction is provided on the motor shaft to provide mounting positioning for the auxiliary blade, and a positioning groove is provided on the auxiliary blade, and when the auxiliary blade is mounted on the motor shaft, the mounting can be completed by engaging the positioning groove with the positioning shaft, and when rotating, the positioning shaft can move the auxiliary blade to rotate together. Naturally, since the positioning shaft on the motor shaft extends along the radial direction, the positioning groove is located at the center of the auxiliary blade and is formed extending along the radial direction, and when engaged, the positioning groove of the auxiliary blade can be aligned with the positioning shaft on the motor shaft, and if there is a circumferential deviation, the auxiliary blade can be rotated to align the positioning shaft with the positioning groove before mounting and alignment.

[0023] Furthermore, the number of positioning axes may be two or more, and the multiple positioning axes are uniformly arranged along the circumferential direction, thereby facilitating a more uniform circumferential force applied to the auxiliary blades.

[0024] The above technical means further includes a locking member on which a first screw member is provided, and a male screw is provided on the end of the motor shaft, and the locking member is tightened by engagement between the male screw and the first screw member.

[0025] In this technical means, a locking member is provided to fix the main blade and the auxiliary blade on the motor shaft in the axial direction by a screw connection, reducing the possibility of axial wobble occurring during rotation and generating noise. Specifically, a first screw member is provided on the locking member, and a male screw is provided on an end of the motor shaft, the male screw being provided on one end of the motor shaft protruding from the motor, and after the auxiliary blade and the main blade are attached in sequence, the positions of the main blade and the auxiliary blade can be restricted by attaching the locking member.

[0026] The above technical means further includes a first damper provided on a side of the main blade facing the auxiliary blade, and a second damper provided on a side of the main blade away from the auxiliary blade.

[0027] In this technical means, one damper is provided on each side of the main blade in the axial direction, which is advantageous in absorbing vibrations generated by the two blades and reducing vibration and noise of the entire machine. Specifically, a first damper is provided between the main blade and the auxiliary blade, and a second damper is provided between the main blade and the locking member, which makes it easy to suppress possible vibration noise generated in the axial direction.

[0028] Furthermore, the material of the first damper and the second damper may be rubber or other materials having shock-absorbing properties, and the specific form may be a seal ring or a gasket, etc.

[0029] A fan apparatus provided according to an embodiment of a second aspect of the present application includes a motor bracket and a blade assembly according to any one of the above first aspects provided on the motor bracket.

[0030] The fan apparatus provided by the present application includes a motor bracket and a blade assembly, where the motor bracket can serve to support the blade assembly.

[0031] Furthermore, the motor bracket is provided with heat dissipation holes, and the air blown out from the auxiliary blades directly hits the motor, effectively dissipating heat from the air around the motor.

[0032] Since the fan apparatus includes a blade assembly, it has the beneficial effects of any of the blade assemblies in the embodiments of the first aspect above, and the description thereof will be omitted here.

[0033] Fan devices include, but are not limited to, devices such as floor standing fans, tower fans, and circulating fans.

[0034] The above technical means includes a removable first mesh cover and a second mesh cover, the first mesh cover and the second mesh cover are connected to form an accommodation cavity, the blade assembly further includes the first mesh cover and the second mesh cover arranged in the accommodation cavity, the first mesh cover is arranged on the exhaust side of the main blade in the blade assembly, and a sound absorbing hole is provided in the outer peripheral wall of the second mesh cover.

[0035] In this technical solution, a first mesh cover and a second mesh cover are provided, which form a receiving cavity for receiving the blade assembly after the two removable mesh covers are connected, and the first mesh cover and the second mesh cover also provide a certain protection for the main blade and the auxiliary blade, improving the safety of use. In addition, the first mesh cover and the second mesh cover are openwork, which can ensure normal intake and exhaust.

[0036] Furthermore, by providing sound absorbing holes in the second mesh cover located on the rear side, it is possible to effectively reduce noise generated when the support blade collides with the inner wall during rotation.

[0037] Furthermore, the opening size of the sound absorbing holes gradually increases from the front to the rear along the axial direction, and the sound absorbing holes are uniformly distributed in the circumferential direction, thereby further enhancing the sound absorbing noise reduction effect.

[0038] Furthermore, by making the first mesh cover located at the front transparent, the user can easily see the internal structure during operation. This is also advantageous for positioning during assembly and improves installation efficiency.

[0039] The above technical means further includes a floor-standing bracket having the motor bracket mounted on one end thereof.

[0040] In this technical solution, the motor bracket is mounted on one end of the floor-mounted bracket, and the blade assembly is mounted on the floor-mounted bracket, so that the entire fan device takes the form of a floor-mounted fan, and the exhaust height is more suited to the user's usage habits.

[0041] In the above technical means, the sound absorbing holes are arranged in the second mesh cover along the circumferential direction of the second mesh cover.

[0042] In this technical means, by arranging the sound absorbing holes along the circumferential direction of the second mesh cover, the sound absorbing noise reduction effect can be further improved during rotation.

[0043] In the above technical means, the size of the sound absorbing holes gradually increases or decreases from the first mesh cover to the second mesh cover along the axial direction of the blade assembly.

[0044] In this technical means, the opening size of the sound absorbing holes changes monotonically from the front to the rear along the axial direction, thereby further enhancing the sound absorbing noise reduction effect.

[0045] In the above technical means, the second mesh cover is provided adjacent to the motor of the blade assembly, a first transparent area is provided on the first mesh cover, and a second transparent area is provided within the blade assembly.

[0046] In this technical solution, the second mesh cover is provided at the rear side of the entire structure, and the first mesh cover is provided at the front side, and a first transparent area is provided on the first mesh cover and a second transparent area is provided in the blade assembly, which makes it easy for users to observe the internal structure, and naturally, when there is a lot of dust on the internal blades, the user can observe it in a timely manner through the transparent area, making it easy to replace them in a timely manner.

[0047] Furthermore, a first transparent area is provided inside the first mesh cover, and a second transparent area is provided in the center of the first blade, and they match each other to achieve a see-through effect.

[0048] Additional aspects and advantages of the present application will become apparent from the following description or may be learned by practice of the present application. [Brief description of the drawings]

[0049] [Figure 1] 1 shows a structural schematic diagram of a blade assembly according to one embodiment of the present application. [Diagram 2] 1 is a schematic structural diagram of a motor according to an embodiment of the present application; [Diagram 3] 1 is a structural schematic diagram of a fan device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0050] In order to make the above objects, features and advantages of the embodiments of the present application more clearly comprehensible, the embodiments of the present application will be described in more detail below with reference to the drawings and specific embodiments. It should be noted that, when there is no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0051] In the following description, many specific details are set forth to provide a thorough understanding of the present application. However, the embodiments of the present application may be implemented in other ways different from those described above, and the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0052] Hereinafter, some embodiments of the present invention will be described with reference to FIGS.

[0053] As shown in Fig. 1, the blade assembly 100 provided in this embodiment mainly includes a motor 106 and two blades arranged on the same shaft, one of which is the main blade 102, which exhausts air to the front side when rotating to ensure normal airflow, and the other is the auxiliary blade 104. During the normal rotation of the main blade 102 to blow air, the twist directions of the first blade 1022 and the second blade 1042 are different, and the intake direction of the auxiliary blade is perpendicular to the exhaust direction, so that during the rotation in the same direction, the exhaust direction of the auxiliary blade is perpendicular to the intake direction, which belongs to the distributed radial exhaust, and can reduce the flow impact of the main blade and reduce noise. In addition, the main blade 102 always blows air to the front side, and the auxiliary blade 104 generates negative pressure when rotating to make the air flow in the motor, which provides a certain heat dissipation effect for the rear motor 106. That is, the main blade 102, the auxiliary blade 104, and the motor 106 are arranged in sequence along the axial direction, and the main blade 102 blows air forward when rotating, and the auxiliary blade 104 controls the air flow around the motor by using negative pressure when rotating, thereby accelerating heat dissipation near the motor 106 and reducing the temperature rise of the motor 106.

[0054] In addition, in the present application, both the main blades and the auxiliary blades are connected to the motor shaft of the motor, and by providing a first damper and / or a second damper on the motor shaft, the possible nose vibration phenomenon can be greatly alleviated, the noise can be further reduced, and the operation of the entire machine can be made more stable and balanced.

[0055] In addition, the main blade 102 is provided with a plurality of first blades 1022, and by providing the plurality of first blades 1022 along the circumferential direction, when the main blade 102 rotates, the first blades 1022 continuously blow air to the front side. Similarly, the auxiliary blade 104 is provided with a plurality of second blades 1042, and the twisting direction of the second blades 1042 is different from the twisting direction of the first blades 1022. When the auxiliary blade 104 and the main blade 102 rotate together, the blowing direction of the second blades 1042 is perpendicular to the blowing direction of the first blades 1022, so that the auxiliary blade 104 can have a good heat dissipation effect on the rear motor 106 during the process in which the main blade 102 normally blows air to the front side.

[0056] In the present application, by limiting the maximum outer diameter of the main blade to be large and the outer diameter of the auxiliary blade to be small, when they rotate together driven by the motor, the rotation of the main blade, which mainly blows air, can better meet the user's needs for heat dissipation and air blowing, and the small-sized auxiliary blade can reduce the impact of the auxiliary blade on the flow field of the main blade, ensure flow efficiency, and reduce noise.

[0057] In one specific embodiment, the auxiliary blade 104 is disposed on the intake side of the main blade 102. When the main blade 102 rotates, air flows from one side of the auxiliary blade 104 to the main blade 102, in this case, the twist directions of the first blade 1022 and the second blade 1042 are different, so by adopting the opposite twist direction, the flow impact of the main blade can be effectively reduced, so that when the auxiliary blade and the main blade rotate together, the air blowing direction of the second blade is different from the air blowing direction of the first blade, and the auxiliary blade generates a radial airflow to increase the intake amount and increase the wind speed, and the airflow is divided by the auxiliary blade and then exhausted by the main blade, so that the exhaust is finer and softer, improving the comfort of the user.

[0058] Generally, the air blowing direction of the main blade 102 is forward, and the intake side is the rear side of the main blade 102. By providing the auxiliary blade 104 on the rear side of the main blade 102, after rotation, as the auxiliary blade 104 rotates, the auxiliary blade provides supplementary intake air to the main blade, thereby increasing the amount of intake air and improving the wind speed.

[0059] In addition, the hub diameter of the main blade is larger than the maximum diameter of the auxiliary blade, which can further reduce the influence of the auxiliary blade on the flow field of the main blade, and reduce the noise increase caused by the influence of the flow field to improve the user experience.

[0060] The blade assembly 100 provided in one specific embodiment mainly includes a motor 106 and two blades arranged on the same shaft, one of which is the main blade 102, which exhausts air to the front side when rotating to ensure normal air flow, and the other is the auxiliary blade 104. During the normal rotation of the main blade 102 to blow air, the twist directions of the first blade 1022 and the second blade 1042 are different, so that during the process of rotating in the same direction, the air blowing direction of the main blade 102 and the air blowing direction of the auxiliary blade 104 are different, and the main blade 102 always blows air to the front side, and the auxiliary blade 104 generates negative pressure when rotating to make the air in the motor flow, and achieves a certain heat dissipation effect for the rear motor 106. That is, the main blade 102, the auxiliary blade 104, and the motor 106 are arranged in sequence along the axial direction, and the main blade 102 blows air forward when it rotates, and the auxiliary blade 104 allows the air generated when it rotates to flow through the motor, accelerating heat dissipation in the vicinity of the motor 106 and reducing the temperature rise of the motor 106.

[0061] As for the motor 106, a motor shaft 1062 is provided on the motor 106, and both the main blade 102 and the auxiliary blade 104 are transmission-connected to the motor shaft 1062. When the motor shaft 1062 rotates, the main blade 102 and the auxiliary blade 104 are moved to rotate in the same direction. As a result, the amount of air blown to the front can be achieved by using only one motor 106, and the weight of the entire blade assembly 100 can be reduced as well as the number of parts.

[0062] Furthermore, as shown in FIG. 2, by providing a flat shaft portion 1063 on the motor shaft 1062, the main blade 102 can realize a transmission connection by engaging with this portion. Specifically, the cross section of the flat shaft portion 1063 on the motor shaft 1062 may be D-shaped, X-shaped, or even any non-circular shape, and a hole of a corresponding shape is provided in the center of the main blade 102. By inserting the main blade 102 into the flat shaft portion 1063, when the motor shaft 1062 rotates, the main blade 102 is moved to rotate together.

[0063] Alternatively, the motor shaft 1062 may be provided with a positioning shaft 1064 extending along the radial direction to provide mounting positioning for the auxiliary blade 104, and a positioning groove may be provided on the auxiliary blade 104, and when the auxiliary blade 104 is mounted on the motor shaft 1062, the mounting may be completed by engaging the positioning groove with the positioning shaft 1064, and when rotating, the positioning shaft 1064 may move the auxiliary blade 104 to rotate together. Naturally, since the positioning shaft 1064 on the motor shaft 1062 extends along the radial direction, the positioning groove is located at the center of the auxiliary blade 104 and is formed extending along the radial direction, and when engaged, the positioning groove of the auxiliary blade 104 may be aligned with the positioning shaft 1064 on the motor shaft 1062, and if there is a circumferential deviation, the auxiliary blade 104 may be rotated to align the positioning shaft 1064 with the positioning groove before mounting and alignment.

[0064] Furthermore, the number of positioning shafts 1064 may be two or more, and the multiple positioning shafts 1064 are uniformly arranged along the circumferential direction, thereby making the circumferential force applied to the auxiliary blades 104 more uniform.

[0065] Of course, in another embodiment, the motor shaft 1062 can be provided with a flat shaft portion 1063 and a positioning shaft 1064 at the same time to achieve connection and fixing to the main blade 102 and the auxiliary blade 104.

[0066] According to any of the embodiments, the locking member 108 is provided to fix the main blade 102 and the auxiliary blade 104 in the motor shaft 1062 in the axial direction by the screw connection, thereby reducing the possibility of axial wobble during rotation and noise generation. Specifically, a first screw member is provided in the locking member 108, and a male screw is provided at an end of the motor shaft 1062, and the male screw is provided at one end of the motor shaft 1062 protruding from the motor 106, and after the auxiliary blade 104 and the main blade 102 are attached in sequence, the positions of the main blade 102 and the auxiliary blade 104 can be restricted by attaching the locking member 108.

[0067] Further, in one embodiment, a first damper 110 is provided.

[0068] In another embodiment, a second damper 112 is provided.

[0069] In another embodiment, the first damper 110 and the second damper 112 are provided simultaneously, with one damper provided on each side of the main blade 102 in the axial direction, which is advantageous in absorbing vibrations generated by the two blades and reducing vibration and noise of the entire machine. Specifically, the first damper 110 is provided between the main blade 102 and the auxiliary blade 104, and the second damper 112 is provided between the main blade 102 and the locking member 108, which makes it easy to suppress possible vibration noise generated in the axial direction.

[0070] Furthermore, the material of the first damper 110 and the second damper 112 may be rubber or other materials having shock-absorbing properties, and the specific form may be a seal ring or a gasket, etc.

[0071] Based on any of the above embodiments, the transparency of the main blades is limited to more than 10% and made semi-transparent or fully transparent, providing a viewing window for the user to easily intuitively observe the operating status inside the fan, and facilitating subsequent maintenance and replacement.

[0072] As shown in FIG. 3 , the fan apparatus 200 provided in this embodiment includes a motor 106 bracket and a blade assembly 100 , where the motor 106 bracket can serve to support the blade assembly 100 .

[0073] Furthermore, the bracket for the motor 106 is provided with heat dissipation holes, and the wind generated by the auxiliary blades 104 flows through the motor 106, thereby effectively dissipating heat from the air around the motor 106.

[0074] Since the fan apparatus 200 includes the blade assembly 100, it has the beneficial effects of any of the blade assemblies 100 in the embodiments of the first aspect above, and the description thereof will be omitted here.

[0075] The fan device 200 includes, but is not limited to, devices such as floor standing fans, tower fans, and circulation fans.

[0076] In addition, as shown in FIG. 3, the first mesh cover 204 and the second mesh cover 206 are removable, and the first mesh cover 204 and the second mesh cover 206 are connected to form an accommodation cavity, and the blade assembly 100 further includes the first mesh cover 204 and the second mesh cover 206 disposed in the accommodation cavity. By providing the first mesh cover 204 and the second mesh cover 206, after the two removable mesh covers are connected, an accommodation cavity is formed to accommodate the blade assembly 100, and the first mesh cover 204 and the second mesh cover 206 further provide a certain protection for the main blade 102 and the auxiliary blade 104, improving the safety of use. In addition, the first mesh cover 204 and the second mesh cover 206 are openwork, so that normal intake and blowing can be ensured.

[0077] The first mesh cover is provided on the exhaust side of the main blade in the blade assembly, and the transparency of the central ring of the first mesh cover is greater than 10%, and the transparent setting is applied to the first mesh cover located on the front side, thereby improving the visibility of the internal structure during operation by the user. It is also advantageous for assembly positioning during installation, improving installation efficiency.

[0078] Naturally, by employing a doughnut-shaped first mesh cover and main blade, a relatively novel appearance can be formed, which is advantageous in enhancing the distinctiveness of the product.

[0079] In addition, it further includes a floor-mounted bracket 208, one end of which is provided with a bracket for the motor 106. By providing the bracket for the motor 106 at one end of the floor-mounted bracket 208, the blade assembly 100 is provided on the floor-mounted bracket 208, so that the entire fan device 200 takes the form of a floor-mounted fan, and the height of the exhaust air is more suited to the usage habits of users.

[0080] Furthermore, the sound absorbing holes 210 are arranged in the second mesh cover along the circumferential direction of the second mesh cover.

[0081] Furthermore, the size of the sound absorbing holes 210 gradually increases or decreases along the axial direction of the vane assembly from the first mesh cover to the second mesh cover.

[0082] Furthermore, the second mesh cover is provided on the rear side of the entire structure, and the first mesh cover is provided on the front side, with a first transparent area provided on the first mesh cover and a second transparent area provided in the blade assembly, which makes it easy for users to observe the internal structure, and naturally, when there is a lot of dust on the internal blades, users can timely observe them through the transparent area, making it easy to replace them in a timely manner.

[0083] Furthermore, a first transparent area is provided inside the first mesh cover, and a second transparent area is provided in the center of the first blade, and they match each other to achieve a see-through effect.

[0084] In one specific embodiment, a heat dissipation structure for a fan motor 106 is provided, in which the main blade 102 serves the main function of the product fan to blow air through the front mesh cover to cool the user, and the auxiliary blade 104 is attached to the rear of the main blade 102 and is used for heat dissipation of the motor 106. Between the main blade 102 and the nut, and between the main blade 102 and the auxiliary blade 104, a vibration-proof washer is provided to absorb the vibration generated by the two blades, which is advantageous for reducing the vibration and noise of the entire machine. The main blade 102 is positioned with the D-shaped flat shaft on the motor shaft 1062 through the central D-shaped hole, and the auxiliary blade 104 is positioned with the shaft pin on the motor shaft 1062 through the central slot structure, and finally, the main blade 102, the auxiliary blade 104, and the two vibration-proof washers are locked to the motor shaft 1062 by the blade nut, and the blade nut and the motor shaft 1062 are fastened by a screw structure.

[0085] Furthermore, the motor 106 is fixed to the motor bracket 202 via screws, the motor bracket 202 is fixed to the motor protective cover via screws, and the motor protective cover is fixed to the head assembly of the entire machine via screws. Also, screws are designed to fix the rear mesh cover to the motor protective cover, and a screw and hook structure is designed to fix the front mesh cover to the rear mesh cover.

[0086] According to the blade assembly and fan equipment provided by the present application, by limiting the maximum outer diameter of the main blade to be large and the outer diameter of the auxiliary blade to be small, it is possible to reduce the influence of the auxiliary blade on the flow field of the main blade, ensure flow efficiency, and reduce noise.

[0087] In this application, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood to indicate or imply any relative importance, and the term "plurality" means two or more, unless otherwise specified. The terms "attached", "coupled", "connected" and "fixed" should be understood in a broad sense, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection, and "connected" may be a direct connection or an indirect connection through an intermediary. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific situation.

[0088] In the description of this application, it should be noted that the orientations or positional relationships indicated using the terms "upper," "lower," "left," "right," "front," "rear," etc. are based on the orientations or positional relationships shown in the drawings, are intended to explain and simplify the description of this application, and do not indicate or imply that a device or unit must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limitations of this application.

[0089] In the present description, the use of terms such as "one embodiment," "some embodiments," "specific embodiments," etc. means that the specific features, structures, materials, or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present description, general descriptions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0090] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Those skilled in the art can make various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0091] The correspondence between the reference numerals and the part names in FIGS. [Explanation of symbols]

[0092] 100 Wing Assembly 102 Main feather 1022 First Blade 104 Auxiliary blade 1042 Second Blade 106 Motor 1062 Motor shaft 1063 Flat shaft part 1064 Positioning axis 108 Locking member 110 First Damper 112 Second Damper 200 Fan Equipment 202 Motor bracket 204 First Mesh Cover 206 Second Mesh Cover 208 Floor Bracket 210 Sound deadening hole

Claims

1. A main blade having a plurality of first blades arranged in a circumferential direction; an auxiliary blade, the auxiliary blade being provided adjacent to the main blade and coaxially therewith, and the auxiliary blade is provided with a plurality of second blades provided in a circumferential direction, the intake direction of the auxiliary blade being an axial direction, the exhaust direction of the auxiliary blade being a radial direction, and the twist directions of the first blades and the second blades being different from each other; a motor provided on a side of the auxiliary blade away from the main blade, The maximum outer diameter of the main blade is larger than the outer diameter of the auxiliary blade, The auxiliary blade is provided on the intake side of the main blade, The auxiliary blade is generally bowl-shaped, The main blade is provided on the protruding side of the auxiliary blade, The motor is mounted on the recessed side of the auxiliary blade.

2. The blade assembly of claim 1 , wherein a hub diameter of the primary blade is greater than a maximum diameter of the secondary blade.

3. The blade assembly of claim 1 , wherein the transparency of the primary blade is greater than 10%.

4. The blade assembly according to claim 1 , further comprising a motor shaft provided on the motor, the main blade being transmission-connected with the motor shaft of the motor, and the auxiliary blade being transmission-connected with the motor shaft.

5. A first damper provided on the side of the main blade facing the auxiliary blade, and / or The blade assembly of claim 1 , further comprising a second damper disposed on a side of the main blade remote from the auxiliary blade.

6. A motor bracket; and a blade assembly according to any one of claims 1 to 5, provided on the motor bracket.

7. a removable first mesh cover and a removable second mesh cover, the first mesh cover and the second mesh cover being connected to form a receiving cavity, the vane assembly further comprising the first mesh cover and the second mesh cover disposed within the receiving cavity; The fan apparatus according to claim 6 , wherein the first mesh cover is provided on an exhaust side of a main blade in the blade assembly, and a sound absorbing hole is provided on an outer peripheral wall of the second mesh cover.

8. The fan apparatus according to claim 7 , wherein the sound absorbing holes are arranged in the second mesh cover along a circumferential direction of the second mesh cover.

9. The fan apparatus of claim 7 , wherein a size of the sound absorbing holes gradually increases or decreases along an axial direction of the blade assembly from the first mesh cover to the second mesh cover.

10. 8. The fan apparatus of claim 7, wherein the second mesh cover is disposed adjacent to a motor of the blade assembly, the first mesh cover having a first transparent area and the blade assembly having a second transparent area.

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