Fan

Abstract

The utility model discloses a fan which comprises a first fan blade assembly, a second fan blade assembly and a middle rectifying assembly, and the first fan blade assembly and the second fan blade assembly are arranged in a spaced mode in the extending direction of a first rotating axis of the first fan blade assembly. The middle rectifying assembly is arranged between the first fan blade assembly and the second fan blade assembly and comprises a plurality of flow deflectors arranged at intervals, and the flow deflectors are used for guiding the flowing path of airflow. According to the fan provided by the embodiment of the utility model, the air flow sent by the first fan blade assembly towards the second fan blade assembly or the air flow sent by the second fan blade assembly towards the first fan blade assembly is prevented from diverging or losing to a certain extent, so that the loss of the air flow can be reduced, and the air outlet quantity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a fan. Background Art

[0002] There are many types of fans. Common fans generally include floor fans and circulating fans. Their air outlet characteristics are not the same. For example, the air outlet speed of a floor fan is lower and the air volume is larger, which manifests as scattered wind; the air outlet speed of a circulating fan is higher and the air volume is smaller, which manifests as concentrated wind.

[0003] In the related art, there is a large amount of loss when the airflow flows inside the fan, which affects its air outlet effect. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a fan, whose guide vane guides the airflow and changes the flow path of the airflow, to a certain extent, avoids the airflow sent by the first fan blade assembly toward the second fan blade assembly, or the airflow sent by the second fan blade assembly toward the first fan blade assembly from diverging or losing, etc., which can reduce the loss of airflow and increase the air output.

[0005] An embodiment of the present application provides a fan, comprising: a first blade assembly and a second blade assembly, wherein the first blade assembly and the second blade assembly are spaced apart in an extension direction of a first rotation axis of the first blade assembly; an intermediate rectifying assembly, wherein the intermediate rectifying assembly is disposed between the first blade assembly and the second blade assembly, and the intermediate rectifying assembly comprises a plurality of guide vanes spaced apart, and wherein the guide vanes are used to guide a flow path of an airflow.

[0006] In the above technical scheme, an intermediate rectifying assembly is arranged between the first fan blade assembly and the second fan blade assembly so that the guide vane guides the flow path of the airflow, so that the airflow sent by the first fan blade assembly toward the second fan blade assembly can be guided by the guide vane, so that the airflow sent by the first fan blade assembly flows toward the second fan blade assembly, or the airflow sent by the second fan blade assembly toward the first fan blade assembly can be guided by the guide vane, so that the airflow sent by the second fan blade assembly flows toward the first fan blade assembly, thereby avoiding the divergence or loss of the airflow sent by the first fan blade assembly toward the second fan blade assembly or the airflow sent by the second fan blade assembly toward the first fan blade assembly to a certain extent, which can reduce the loss of airflow and help to increase the air supply volume of the fan; at the same time, the airflow blown out by the first fan blade assembly will be accelerated by the second fan blade assembly, or the airflow blown out by the second fan blade assembly will be accelerated by the first fan blade assembly, and the airflows blown out by the first fan blade assembly and the second fan blade assembly are gathered together and sent out, which is beneficial to increase the air supply speed of the fan, and thus can improve the air supply effect of the fan.

[0007] In some embodiments of the present application, the first fan blade assembly supplies air toward the second fan blade assembly, and the guide vane is arranged parallel to the first rotation axis.

[0008] In some embodiments of the present application, the outer peripheral wall of the intermediate rectifying assembly is formed into a circular ring structure, and the outer diameter of the intermediate rectifying assembly is smaller than the outer diameter of the first fan blade assembly and larger than the outer diameter of the second fan blade assembly.

[0009] In some embodiments of the present application, the intermediate rectifying assembly includes an intermediate seat and an outer ring, and the two ends of the guide vane are respectively connected to the intermediate seat and the outer ring; the fan also includes a driving assembly, which is respectively connected to the first blade assembly and the second blade assembly to drive them to rotate, and the driving assembly is installed to the intermediate seat.

[0010] In some embodiments of the present application, the driving assembly includes a mounting seat for placing the motor, the mounting seat is fixed to the intermediate seat, and a heat dissipation area is provided on a peripheral wall of the mounting seat.

[0011] In some embodiments of the present application, the fan further includes an air guide tube for guiding air flow, and the first fan blade assembly, the intermediate rectifying assembly and the second fan blade assembly are respectively arranged in the air guide tube.

[0012] In some embodiments of the present application, the fan further includes a plurality of connecting arms, the plurality of connecting arms are arranged at intervals, and two ends of each of the connecting arms are respectively connected to the intermediate rectifying assembly and the inner circumferential wall of the air guide cylinder.

[0013] In some embodiments of the present application, the first fan blade assembly includes a plurality of first fan blades, the second fan blade assembly includes a plurality of second fan blades, the rotation direction of the first fan blades is the same as the rotation direction of the second fan blades, and the first fan blades and the second fan blades have the same rotation direction.

[0014] In some embodiments of the present application, the first fan blade assembly includes a plurality of first fan blades, the second fan blade assembly includes a plurality of second fan blades, the diameter of the first fan blade is larger than the diameter of the second fan blade, and the first fan blade assembly supplies air toward the second fan blade assembly, wherein the fan has a wind gathering mode and a wind dispersion mode, in the wind gathering mode, the rotation speed of the second fan blade is greater than or equal to the rotation speed of the first fan blade, and in the wind dispersion mode, the rotation speed of the second fan blade is less than the rotation speed of the first fan blade; or, in the wind gathering mode, the rotation speed of the second fan blade is greater than the rotation speed of the first fan blade, and in the wind dispersion mode, the rotation speed of the second fan blade is less than or equal to the rotation speed of the first fan blade.

[0015] In some embodiments of the present application, the fan also includes an air outlet mesh cover, which is arranged at the air outlet end of the second fan blade assembly, and the air outlet mesh cover includes a middle area and an outer area, the middle area is located radially inside the outer area, the middle area is configured to gather the airflow toward the direction of the first rotation axis, and the outer area is configured to diffuse the airflow in a direction away from the first rotation axis.

[0016] In some embodiments of the present application, the outer layer region includes a plurality of first wind guide ribs spaced circumferentially, and an angle α is formed between an extension direction of the first wind guide ribs and the first rotation axis, and 5°≤α≤90°.

[0017] In some embodiments of the present application, the thickness of the air outlet end of the first air guide rib is greater than the thickness of the windward end; and / or the extension length of the first air guide rib is L, 4mm≤L≤15mm.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a partial structural exploded schematic diagram of a fan provided in some embodiments of the present application;

[0021] Figure 2 is a schematic diagram of an intermediate rectifier assembly, an air guide cylinder and a motor provided in some embodiments of the present application;

[0022] Figure 3 is a partial structural schematic diagram of a fan provided in some embodiments of the present application;

[0023] Figure 4 is a cross-sectional view of a fan provided in some embodiments of the present application;

[0024] Figure 5 is an exploded schematic diagram of another part of the structure of the fan provided in some embodiments of the present application;

[0025] Figure 6 is a schematic diagram of an air outlet grille provided in some embodiments of the present application;

[0026] Figure 7 yes Figure 6 The cross-sectional view along line AA shown in FIG.

[0027] Figure 8is a schematic diagram of a fan provided in some embodiments of the present application;

[0028] Fig. 9 is another schematic diagram of a fan provided in some embodiments of the present application;

[0029] Fig.10 This is another schematic diagram of the fan provided in some embodiments of the present application.

[0030] Reference numerals:

[0031] The fan 100, the first rotation axis 10a, the flow space 10b,

[0032] The first fan blade assembly 1, the first fan blade 11,

[0033] The second fan blade assembly 2, the second fan blade 21,

[0034] Intermediate rectifier assembly 3, guide vane 31, intermediate seat 32, outer ring 33,

[0035] Drive assembly 4, first motor 4a, second motor 4b, transmission 4d, motor 4e, mounting seat 41, heat dissipation area 41a, heat dissipation hole 41b,

[0036] Air guide 5, air inlet 5a, air outlet 5b, first air inlet area 51, first air inlet hole 511, second air inlet area 52, second air inlet hole 521, connecting arm 53,

[0037] The air outlet mesh cover 6, the outer layer area 61, the first air guide rib 611, the air outlet end 611a, the windward end 611b, the middle area 62, the second air guide rib 621, the first frame 63, the second frame 64,

[0038] Air inlet grille 7. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0041] Hereinafter, a fan 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0042] like Figure 1 and Figure 2 As shown, the fan 100 according to the embodiment of the present invention comprises a first blade assembly 1, a second blade assembly 2 and an intermediate rectifying assembly 3. In the extension direction of the first rotation axis 10a of the first blade assembly 1, the first blade assembly 1 and the second blade assembly 2 are arranged at intervals.

[0043] The intermediate rectifying assembly 3 is arranged between the first blade assembly 1 and the second blade assembly 2. The intermediate rectifying assembly 3 includes a plurality of guide vanes 31 arranged at intervals. The guide vanes 31 are used to guide the flow path of the airflow. Therefore, by arranging the intermediate rectifying assembly 3 so that the guide vanes 31 guide the flow path of the airflow, the airflow sent from the first blade assembly 1 toward the second blade assembly 2 can be guided by the guide vanes 31 so that the airflow sent from the first blade assembly 1 flows toward the second blade assembly 2. Alternatively, the airflow sent from the second blade assembly 2 toward the first blade assembly 1 can be guided by the guide vanes 31 so that the airflow sent from the second blade assembly 2 flows toward the first blade assembly 1, thereby avoiding the first blade assembly 1 to flow toward the second blade assembly 2 to a certain extent. The airflow delivered by the blade assembly 2, or the airflow delivered by the second fan blade assembly 2 toward the first fan blade assembly 1, diverges or loses, etc., which can reduce the loss of airflow and is beneficial to increasing the air supply volume of the fan 100; at the same time, the airflow blown out by the first fan blade assembly 1 will be accelerated by the second fan blade assembly 2, or the airflow blown out by the second fan blade assembly 2 will be accelerated by the first fan blade assembly 1, and the airflows blown out by the first fan blade assembly 1 and the second fan blade assembly 2 are gathered together and delivered, which is beneficial to increasing the air supply speed of the fan 100, and further improving the air supply effect of the fan 100.

[0044] It can be understood that the guide vane 31 is used to guide the flow path of the airflow, which can be understood as the guide vane 31 guiding the airflow and changing the flow path of the airflow so as to direct the airflow guided by the guide vane 31 toward the first blade assembly 1 or the second blade assembly 2. Exemplarily, the first blade assembly 1 sends air toward the second blade assembly 2, and the airflow sent by the first blade assembly 1 is guided by the guide vane 31 and sent toward the second blade assembly 2, thereby avoiding the airflow sent by the first blade assembly 1 toward the second blade assembly 2 from diverging or losing to a certain extent, and the air output can be increased.

[0045] For example, in combination Figure 1 and Figure 4 , in the extension direction of the first rotation axis 10a of the first blade assembly 1, the first blade assembly 1 and the second blade assembly 2 are arranged at intervals, that is, the first blade assembly 1 and the second blade assembly 2 are arranged coaxially, and an intermediate rectifying assembly 3 is provided between the first blade assembly 1 and the second blade assembly 2, and the intermediate rectifying assembly 3 includes a plurality of guide vanes 31 arranged in sequence around the first rotation axis 10a of the first blade assembly 1. For example, taking the extension direction of the first rotation axis 10a of the first blade assembly 1 as the front-to-back direction, and the first blade assembly 1 being located at the rear side of the second blade assembly 2 as an example for explanation, the first blade assembly 1 and the second blade assembly 2 rotate in the same direction, and the first blade assembly 1 supplies air toward the second blade assembly 2, that is, the first blade assembly 1 and the second blade assembly 2 both supply air toward the front side, then the airflow delivered by the first blade assembly 1 first passes through the intermediate rectifying assembly 3, and the guide vanes 31 guide the airflow toward the direction of the second blade assembly 2, so that the airflow delivered by the first blade assembly 1 is along the direction toward the second blade assembly 2 The air is delivered along the flow path, that is, the airflow delivered by the first fan blade assembly 1 is guided by the intermediate rectifying assembly 3 and converged toward the second fan blade assembly 2, thereby reducing the divergence of the airflow delivered by the first fan blade assembly 1 (for example, the circumferential velocity component of the airflow causes the airflow to diffuse circumferentially) or loss (for example, the airflow does not flow toward the second fan blade assembly 2), etc. At the same time, the airflow delivered by the first fan blade assembly 1 is accelerated by the second fan blade assembly 2 and delivered together with the airflow delivered by the second fan blade assembly 2, which can increase the air output and air output speed of the fan 100, and thus improve the air supply effect of the fan 100.

[0046] In the above technical solution, by arranging the intermediate rectifying assembly 3 between the first blade assembly 1 and the second blade assembly 2 so that the guide vane 31 guides the flow path of the airflow, the airflow sent from the first blade assembly 1 toward the second blade assembly 2 can be guided by the guide vane 31 so that the airflow sent from the first blade assembly 1 flows toward the second blade assembly 2, or the airflow sent from the second blade assembly 2 toward the first blade assembly 1 can be guided by the guide vane 31 so that the airflow sent from the second blade assembly 2 flows toward the first blade assembly 1, thereby avoiding the problem to a certain extent. The airflow sent by the first fan blade assembly 1 toward the second fan blade assembly 2, or the airflow sent by the second fan blade assembly 2 toward the first fan blade assembly 1, diverges or loses, etc., which can reduce the loss of airflow and is beneficial to increasing the air supply of the fan 100; at the same time, the airflow blown out by the first fan blade assembly 1 will be accelerated by the second fan blade assembly 2, or the airflow blown out by the second fan blade assembly 2 will be accelerated by the first fan blade assembly 1, and the airflows blown out by the first fan blade assembly 1 and the second fan blade assembly 2 are gathered together and sent out, which is beneficial to increasing the air supply speed of the fan 100, and further improving the air supply effect of the fan 100.

[0047] In some embodiments of the present application, Figure 2 and Figure 4 As shown, the first fan blade assembly 1 supplies air toward the second fan blade assembly 2, and the guide vane 31 is arranged parallel to the first rotation axis 10a.

[0048] In the above technical scheme, by arranging the guide vane 31 parallel to the first rotation axis 10a, the guide vane 31 can rectify the airflow sent out from the first fan blade assembly 1 toward the second fan blade assembly 2, that is, the guide vane 31 can eliminate the circumferential rotation component of the airflow, so that the circumferential rotation component of the airflow is converted into an axial velocity component, so that the airflow sent out by the first fan blade assembly 1 flows in a direction parallel to the first rotation axis 10a, thereby avoiding to a certain extent the diffusion of the airflow in a direction away from the first rotation axis 10a (for example, the circumferential direction) due to the circumferential velocity component of the airflow, which is beneficial to reduce the loss of air volume supplied from the first fan blade assembly 1 toward the second fan blade assembly 2.

[0049] In some embodiments of the present application, Figure 2-Figure 3 As shown, the outer peripheral wall of the intermediate rectifying assembly 3 is formed into a circular ring structure, and the outer diameter of the intermediate rectifying assembly 3 is smaller than the outer diameter of the first fan blade assembly 1 and larger than the outer diameter of the second fan blade assembly 2 .

[0050] In the above technical scheme, by setting the outer peripheral wall of the intermediate rectifying component 3 to be formed into a circular ring structure, the intermediate rectifying component 3 can be better adapted to the outer contour of the first blade component 1 and the second blade component 2 during rotation; secondly, the outer diameter of the intermediate rectifying component 3 is smaller than the outer diameter of the first blade component 1 and larger than the outer diameter of the second blade component 2, so that the outer diameter of the intermediate rectifying component 3 is adapted to the outer diameter of the second blade component 2, so that the outer diameter of the intermediate rectifying component 3 is within a suitable range, so that the airflow rectified by the intermediate rectifying component 3 meets the needs of the second blade component 2, and reduces the influence of the intermediate rectifying component 3 on the air supply of the first blade component 1 to a certain extent (for example, the intermediate rectifying component 3 interferes with the air supply volume and air supply speed of the first blade component 1), which is beneficial to improving the air outlet effect of the fan 100 (for example, the air outlet volume and air outlet speed).

[0051] In some embodiments of the present application, Figure 2 and Figure 4 The intermediate rectifying assembly 3 includes an intermediate seat 32 and an outer ring 33, and the two ends of the guide vane 31 are respectively connected to the intermediate seat 32 and the outer ring 33; the fan 100 also includes a driving assembly 4, which is respectively connected to the first blade assembly 1 and the second blade assembly 2 to drive them to rotate, and the driving assembly 4 is installed to the intermediate seat 32.

[0052] In the above technical solution, the two ends of the guide vane 31 are respectively connected to the middle seat 32 and the outer ring 33, so that the guide vane 31 is reliably arranged to ensure that the guiding effect of the guide vane 31 is reliable; secondly, the middle seat 32 can provide an installation position for the drive component 4, which is convenient for the drive component 4 to drive the first fan blade component 1 and the second fan blade component 2 to rotate. At the same time, since there is no need to set a separate component for fixing the drive component, the integration between the various components of the fan is improved, which facilitates the miniaturization of the fan.

[0053] In some embodiments of the present application, Figure 2 As shown, the driving assembly 4 includes a mounting seat 41 for placing the motor 4e. The mounting seat 41 is fixed to the middle seat 32, and a heat dissipation area 41a is provided on the peripheral wall of the mounting seat 41.

[0054] For example, combined with Figure 2 A plurality of heat dissipation holes 41 b are arranged at intervals on the peripheral wall of the mounting seat 41 , and the heat dissipation holes 41 b connect the mounting seat 41 with the external environment to facilitate air circulation.

[0055] Optionally, the mounting seat 41 and the intermediate seat 32 may be an integral piece.

[0056] In the above technical solution, the mounting seat 41 is provided on the middle seat 32 to fix the motor 4e and ensure the stable setting of the motor 4e. Secondly, the peripheral wall of the mounting seat 41 is provided with a heat dissipation area 41a (for example, the peripheral wall of the mounting seat 41 is provided with a plurality of heat dissipation holes 41b), which can improve the heat dissipation effect of the motor 4e and is conducive to improving the performance of the motor 4e.

[0057] Optionally, combined Figure 1 and Figure 5 There are two motors 4e and include a first motor 4a and a second motor 4b. Mounting seats 41 are provided on opposite sides of the middle seat 32. The first motor 4a is provided on one of the mounting seats 41 and drives the first fan blade assembly 1 to rotate. The second motor 4b is provided on the other mounting seat 41 and drives the second fan blade assembly 2 to rotate. Therefore, the rotation speeds of the first fan blade assembly 1 and the second fan blade assembly 2 can be respectively controlled by the first motor 4a and the second motor 4b; or, there is one motor 4e, and the driving assembly 4 also includes a transmission 4d. A mounting seat 41 is provided on one side of the middle seat 32 and a fixed seat is provided on the other side. The motor 4e is drivingly connected to the transmission 4d. The motor 4e is provided on the mounting seat 41, and the transmission 4d is provided on the fixed seat and drives the first fan blade assembly 1 and the second fan blade assembly 2 to rotate respectively. Therefore, the rotation speeds of the first fan blade assembly 1 and the second fan blade assembly 2 can be respectively controlled by the transmission 4d.

[0058] In some embodiments of the present application, Figure 1 and Figure 4 As shown, the fan 100 further includes an air guide tube 5 for guiding the flow of air, and the first fan blade assembly 1, the intermediate rectifying assembly 3 and the second fan blade assembly 2 are respectively arranged in the air guide tube 5.

[0059] For example, combined with Figure 1 and Figure 4 The axial ends of the air guide tube 5 are open, one of the open ends of the air guide tube 5 forms an air inlet 5a, and the other open end forms an air outlet 5b. The first blade assembly 1 and the second blade assembly 2 rotate in the same direction and deliver air toward the air outlet 5b. In this way, air is sucked in from the air inlet 5a of the air guide tube 5, and then passes through the first blade assembly 1, the intermediate rectifier assembly 3 and the second blade assembly 2 in sequence, and finally delivered from the air outlet 5b.

[0060] In the above technical solution, the first blade assembly 1, the intermediate rectifying assembly 3, and the second blade assembly 2 are respectively arranged in the air guide 5, so that the air guide 5 can constrain the air flow of the first blade assembly 1 and the second blade assembly 2, and can guide the air flow sent by the fan 100, so that the air supply direction of the fan 100 can be changed by adjusting the direction of the air guide 5. Secondly, the air guide 5 can protect the first blade assembly 1, the intermediate rectifying assembly 3, and the second blade assembly 2, which is conducive to improving the safety of the fan 100.

[0061] Optionally, combined Figure 2 The peripheral side wall of the air guide 5 is also formed with a first air inlet area 51 and a second air inlet area 52, which are spaced apart in the axial direction of the air guide 5, and the first air inlet area 51 is arranged corresponding to the first fan blade assembly 1, and the second air inlet area 52 is arranged corresponding to the second fan blade assembly 2. For example, the first air inlet area 51 includes a plurality of first air inlet holes 511 spaced apart along the circumferential direction of the peripheral side wall of the air guide 5, and the second air inlet area 52 includes a plurality of second air inlet holes 521 spaced apart along the circumferential direction of the peripheral side wall of the air guide 5, so that the first air inlet area 51 can provide air for the first fan blade assembly 1, and the second air inlet area 52 can provide air for the second fan blade assembly 2, thereby increasing the air intake of the fan 100 and thus increasing the air output of the fan 100.

[0062] In some embodiments of the present application, Figure 2 As shown, the fan 100 further includes a plurality of connecting arms 53 , which are arranged at intervals, and two ends of each connecting arm 53 are respectively connected to the inner circumferential wall of the intermediate rectifying assembly 3 and the air guide cylinder 5 .

[0063] Optionally, the connection position between the connecting arm 53 and the intermediate rectifying assembly 3 is not limited. For example, the connecting arm 53 can be connected to the outer peripheral wall of the intermediate rectifying assembly 3 or the intermediate seat 32 of the intermediate rectifying assembly 3.

[0064] For example, combined with Figure 2 A plurality of connecting arms 53 are arranged in sequence around the first rotation axis 10a of the first fan blade assembly 1, and one end of each connecting arm 53 is connected to the outer peripheral wall of the intermediate rectifying assembly 3, and the other end is connected to the inner peripheral wall of the air guide tube 5. A flow space 10b is provided between the outer peripheral wall of the intermediate rectifying assembly 3 and the inner peripheral wall of the air guide tube 5, and the flow space is roughly formed into an annular structure. A portion of the airflow sent by the first fan blade assembly 1 toward the second fan blade assembly 2 flows to the second fan blade assembly 2 through the flow space 10b, and the other portion flows to the second fan blade assembly 2 through the intermediate rectifying assembly 3.

[0065] In the above technical solution, multiple connecting arms 53 are provided to connect the intermediate rectifying assembly 3 and the inner peripheral wall of the air guide tube 5, so that the intermediate rectifying assembly 3 and the air guide tube 5 become a whole, which is beneficial to improve the stability of the intermediate rectifying assembly 3 arranged in the air guide tube 5.

[0066] In some embodiments of the present application, Figure 1 and Figure 4 As shown, the first fan blade assembly 1 includes multiple first fan blades 11, and the second fan blade assembly 2 includes multiple second fan blades 21. The rotation direction of the first fan blade 11 is the same as that of the second fan blade 21, and the first fan blade 11 and the second fan blade 21 have the same rotation direction.

[0067] In the above technical solution, the rotation direction of the first blade 11 and the rotation direction of the second blade 21 are set to be the same, so that the first blade assembly 1 and the second blade assembly 2 can supply air in the same direction, that is, the first blade assembly 1 and the second blade assembly 2 can supply air in the same direction.

[0068] In some embodiments of the present application, Figure 3-Figure 4 As shown, the first fan blade assembly 1 includes a plurality of first fan blades 11, the second fan blade assembly 2 includes a plurality of second fan blades 21, the diameter of the first fan blade 11 is greater than the diameter of the second fan blade 21, and the first fan blade assembly 1 supplies air toward the second fan blade assembly 2, wherein the fan 100 has a wind gathering mode and a wind dispersion mode, in the wind gathering mode, the rotation speed of the second fan blade 21 is greater than or equal to the rotation speed of the first fan blade 11, and in the wind dispersion mode, the rotation speed of the second fan blade 21 is less than the rotation speed of the first fan blade 11; or, in the wind gathering mode, the rotation speed of the second fan blade 21 is greater than the rotation speed of the first fan blade 11, and in the wind dispersion mode, the rotation speed of the second fan blade 21 is less than or equal to the rotation speed of the first fan blade 11.

[0069] For example, in combination Figure 3-Figure 4 , taking the example that the first blade assembly 1 and the second blade assembly 2 supply air in the same direction, and the guide plate 31 is arranged parallel to the first rotation axis 10a, the first blade assembly 1, the intermediate rectifying assembly 3 and the second blade assembly 2 are respectively arranged in the air guide tube 5, in the extension direction of the first rotation axis 10a of the first blade assembly 1, the first blade assembly 1 and the second blade assembly 2 are arranged at intervals, the intermediate rectifying assembly 3 is arranged between the first blade assembly 1 and the second blade assembly 2, and the outer diameter of the first blade assembly 1 is greater than the outer diameter of the second blade assembly 2.

[0070] When the rotation speed of the second fan blade 21 is greater than the rotation speed of the first fan blade 11, the airflow delivered by the first fan blade assembly 1 is first rectified by the intermediate rectifier assembly 3, so that the guide vane 31 converts the circumferential rotation component of the airflow into an axial speed component (for example, in a direction parallel to the first rotation axis 10a), so that the airflow flows toward the second fan blade assembly 2 in a direction parallel to the first rotation axis 10a, and the air delivery speed of the first fan blade assembly 1 is increased. Since the rotation speed of the second fan blade 21 is greater than the rotation speed of the first fan blade 11, most of the airflow delivered by the first fan blade assembly 1 will be gathered toward the second fan blade assembly 2 (for example, the airflow delivered by the first fan blade assembly 1 is sucked into the second fan blade assembly 2), and is accelerated by the second fan blade assembly 2 and blown out together with the airflow delivered by the second fan blade assembly 2. At this time, the air outlet speed of the fan 100 is large and the air outlet area is small, so as to achieve the effect of gathering wind and supplying air.

[0071] When the rotation speed of the second fan blade 21 is lower than that of the first fan blade 11, most of the airflow delivered by the first fan blade assembly 1 is blown out from between the first fan blade assembly 1 and the air guide tube 5, and a small part of the airflow is rectified by the intermediate rectifying assembly 3 and blown out together with the second fan blade assembly 2. At this time, the air outlet area of ​​the fan 100 is large and the speed is low to achieve the effect of dispersed air supply.

[0072] When the rotation speed of the second fan blade 21 is equal to the rotation speed of the first fan blade 11, part of the airflow delivered by the first fan blade assembly 1 is blown out from between the first fan blade assembly 1 and the air guide tube 5, and the other part is rectified by the intermediate rectifying assembly 3 and blown out together with the second fan blade assembly 2. At this time, the air outlet speed and air outlet area of ​​the fan 100 are appropriate, so that the fan 100 has a certain air supply effect of dispersing and gathering wind.

[0073] Optionally, when the outer diameter of the intermediate rectifying assembly 3 is smaller than the outer diameter of the first fan blade assembly 1 and larger than the outer diameter of the second fan blade assembly 2, for example, the outer diameter of the intermediate rectifying assembly 3 is smaller than the outer diameter of the first fan blade assembly 1 and slightly larger than the outer diameter of the second fan blade assembly 2, when the fan 100 is in the wind gathering mode, the airflow delivered by the first fan blade assembly 1 is rectified by the intermediate rectifying assembly 3, and most of it is collected together by the second fan blade assembly 2 and blown out from the second fan blade assembly 2, with a large air outlet speed and a small air outlet area to achieve a wind gathering effect; when the fan 100 is in the wind dispersion mode, most of the airflow delivered by the first fan blade assembly 1 is blown out from between the intermediate rectifying assembly 3 and the guide tube, and at this time most of the airflow has a circumferential rotation component, so that most of the airflow diffuses in the circumferential direction, and part of the airflow passes through the intermediate rectifying assembly 3 and is blown out together with the second fan blade assembly 2, with a large air outlet area and a low speed to achieve a wind dispersion effect.

[0074] In the above technical solution, by setting the rotation speed of the second blade 21 to be greater than the rotation speed of the first blade 11, the airflow sent out by the first blade assembly 1 is first rectified by the intermediate rectifier assembly 3, so that the guide vane 31 converts the circumferential rotation component of the airflow into an axial velocity component, so that the airflow flows toward the second blade assembly 2 in a direction parallel to the first rotation axis 10a, and the air supply speed of the first blade assembly 1 is increased, so that most of the airflow sent out by the first blade assembly 1 will be gathered toward the second blade assembly 2, and will be accelerated by the second blade assembly 2 and discharged from the second blade assembly 2. The airflow sent out by the first fan blade assembly 1 is blown out together with the airflow sent out by the second fan blade assembly 2, the air outlet speed of the fan 100 is large and the air outlet area is small, so as to achieve the effect of gathering wind and sending air. At this time, the fan 100 is in the gathering wind mode; the rotation speed of the second fan blade 21 is less than the rotation speed of the first fan blade 11, and most of the airflow sent out by the first fan blade assembly 1 is blown out from between the first fan blade assembly 1 and the air guide tube 5, and a small part of the airflow is rectified by the intermediate rectifier assembly 3 and blown out together with the second fan blade assembly 2. The air outlet area of ​​the fan 100 is large and the speed is low, so as to achieve the effect of dispersing wind and sending air. At this time, the fan 100 is in the dispersing wind mode. Therefore, the fan 100 has a gathering wind mode and a dispersing wind mode, and the fan 100 can switch between the gathering wind mode and the dispersing wind mode, so that the fan 100 has a variety of air supply effects, so as to adapt to user needs.

[0075] In some embodiments of the present application, Figure 1 and Figure 6 As shown, the fan 100 also includes an air outlet mesh cover 6, which is arranged at the air outlet end 611a of the second fan blade assembly 2, and the air outlet mesh cover 6 includes a middle area 62 and an outer area 61, the middle area 62 is located radially inside the outer area 61, the middle area 62 is configured to gather the airflow toward the direction of the first rotation axis 10a, and the outer area 61 is configured to diffuse the airflow in a direction away from the first rotation axis 10a.

[0076] For example, combined with Figure 4 and Figure 6 In the wind gathering mode, the rotation speed of the second fan blade 21 is greater than the rotation speed of the first fan blade 11, and the airflow delivered by the first fan blade assembly 1 is first rectified by the intermediate rectifier assembly 3, so that the guide vane 31 converts the circumferential rotation component of the airflow into an axial velocity component, so that the airflow flows toward the second fan blade assembly 2 in a direction parallel to the first rotation axis 10a, and the air delivery speed of the first fan blade assembly 1 is increased. Since the rotation speed of the second fan blade 21 is greater than the rotation speed of the first fan blade 11, most of the airflow delivered by the first fan blade assembly 1 will be gathered toward the second fan blade assembly 2, and accelerated by the second fan blade assembly 2 and blown out through the middle area 62 of the air outlet mesh cover 6 together with the airflow delivered by the second fan blade assembly 2, so that the delivered airflow gathers toward the middle. At this time, the air outlet speed of the fan 100 is large and the air outlet area is small, so as to achieve the air supply effect of converging wind.

[0077] In the wind dispersion mode, the rotation speed of the second blade 21 is less than the rotation speed of the first blade 11, and most of the airflow sent out by the first blade assembly 1 is blown out from between the first blade assembly 1 and the air guide tube 5 and passes through the outer layer area 61 of the air outlet mesh cover 6, so that most of the airflow diffuses in the direction away from the first rotation axis 10a, and a small part of the airflow is rectified by the middle rectifier assembly 3 and blown out toward the middle area 62 together with the second blade assembly 2. At this time, the air outlet area of ​​the fan 100 is large and the air outlet speed is low, so as to achieve the air supply effect of scattered and soft wind. Therefore, through the differential design of the first blade assembly 1 and the second blade assembly 2, and the partition design of the air outlet mesh cover 6, the air supply effects of the fan 100 of dispersing and gathering wind can be achieved.

[0078] In the above technical solution, by setting the middle area 62 to be located radially inward of the outer area 61, the airflow blown out by the first blade assembly 1 and the second blade assembly 2 in the wind gathering mode is blown out through the middle area 62, so that the airflow is gathered toward the middle, which can further improve the wind gathering effect of the fan 100, so that the air outlet speed of the fan 100 is large and the air outlet area is small, thereby achieving the air supply effect of the converged wind; in the wind dispersion mode, most of the airflow blown out by the first blade assembly 1 is blown out through the outer area 61, so that most of the airflow is diffused in the direction away from the first rotation axis 10a, which can further improve the wind dispersion effect of the fan 100, and at the same time, a small part of the airflow is rectified by the middle rectifier assembly 3 and blown out toward the middle area 62 together with the second blade assembly 2, so that the air outlet area of ​​the fan 100 is large and the air outlet speed is low, thereby achieving the air supply effect of the dispersed and soft wind. Therefore, by setting the air outlet mesh cover 6, the wind gathering effect of the fan 100 in the wind gathering mode and the wind dispersion effect in the wind dispersion mode can be further improved.

[0079] Optionally, the outer diameter of the outer region 61 is equal to the diameter of the first fan blade 11, and the outer diameter of the middle region 62 is equal to the diameter of the second fan blade 21, so that the outer region 61 corresponds to the first fan blade assembly 1, and the middle region 62 corresponds to the second fan blade assembly 2, which is beneficial to improving the wind outlet effect of the fan 100 (for example, wind gathering or wind dispersion effect).

[0080] Alternatively, if Figure 1 As shown, the fan 100 further includes an air inlet mesh cover 7 , which is disposed at the air inlet end of the first fan blade assembly 1 .

[0081] In some embodiments of the present application, Figure 7 As shown, the outer region 61 includes a plurality of first air guiding ribs 611 spaced apart in the circumferential direction, and an angle α is formed between the extension direction of the first air guiding ribs 611 and the first rotation axis 10a, 5°≤α≤90°.

[0082] For example, combined with Figure 4 and Figure 7 , in the direction of the airflow flowing through the first air guide rib 611, the angle α between the extension direction of the first air guide rib 611 and the first rotation axis 10a is . Optionally, the angle α between the extension direction of the first air guide rib 611 and the first rotation axis 10a may be 5°, 15°, 30°, 45°, 60°, 80°, or 90°, etc.

[0083] In the above technical solution, by setting the angle between the extension direction of the first wind guide rib 611 and the first rotation axis 10a to be within a suitable range, the first wind guide rib 611 has a suitable wind guiding angle, so that the outer area 61 has a better wind dispersion effect.

[0084] Alternatively, if Figure 6 As shown, the middle area 62 includes a plurality of second air guide ribs 621 arranged at intervals in the circumferential direction, and the extension direction of the second air guide ribs 621 is parallel to the first rotation axis 10a. Therefore, when part of the airflow sent out by the fan 100 is blown out from the middle area 62, the sent part of the airflow will flow in a direction parallel to the first rotation axis 10a under the guidance of the plurality of second air guide ribs 621, and the middle area 62 can convert the circumferential rotation component of the airflow into an axial velocity component to a certain extent, thereby increasing the outlet velocity of the airflow passing through the middle area 62, which is beneficial to increasing the air supply distance and air supply velocity of the fan 100.

[0085] Optionally, there is an angle between the extension direction of the first wind guide rib 611 and the first rotation axis 10a, that is, the first wind guide rib 611 is inclined toward the first rotation axis 10a, and the multiple first fan blades 11 are inclined toward the first rotation axis 10a, and the inclination direction of the first wind guide rib 611 relative to the first rotation axis 10a is opposite to the inclination direction of the first fan blade 11 relative to the first rotation axis 10a, so that the outer area 61 can diffuse the supply airflow of the first fan blade assembly 1 in the direction away from the first rotation axis 10a.

[0086] For example, combined with Figure 4 and Figure 6The air outlet grille 6 includes a first frame 63 and a second frame 64, the first frame 63 and the second frame 64 form a circular ring structure, and the second frame 64 is sleeved in the first frame 63. There is an outer layer area 61 between the first frame 63 and the second frame 64, and the outer layer area 61 includes a plurality of first air guide ribs 611, and the plurality of first air guide ribs 611 are arranged at intervals along the circumference of the second frame 64 and radially outward of the second frame 64, and the two ends of the plurality of first air guide ribs 611 are respectively connected to the first frame 63 and the second frame 64, and the plurality of first air guide ribs 611 are radially distributed, and each first air guide rib 611 is arranged parallel to one of the radial directions of the first frame 63. In the direction of the airflow flowing through the first air guide ribs 611, the angle α between the extension direction of each first air guide rib 611 and the first rotation axis 10a is such that the outer layer area 61 can diffuse the airflow in a direction away from the first rotation axis 10a.

[0087] The second frame 64 has a middle area 62, and the middle area 62 includes a plurality of second air guiding ribs 621, which are arranged radially inward of the second frame 64 at intervals along the circumference of the second frame 64, and are radially distributed, and the plurality of second air guiding ribs 621 are bent toward the same rotation direction. The extension direction of each second air guiding rib 621 is parallel to the first rotation axis 10a, so that the middle area 62 can gather the airflow toward the direction of the first rotation axis 10a.

[0088] Optionally, combined Figure 6 The included angle between the extension direction of the first air guide rib 611 from the second skeleton 64 toward the first skeleton 63 and the cross-section of the air guide tube 5 is β, 0°≤β≤5°, so that the end of the first air guide rib 611 away from the first rotation axis 10a is inclined toward the direction close to the first rotation axis 10a, which can make the airflow guided through the outer layer area 61 diffuse in the direction away from the first rotation axis 10a, which is beneficial to further improve the wind dispersion effect of the outer layer area 61.

[0089] In some embodiments of the present application, Figure 7 , the thickness of the air outlet end 611a of the first air guiding rib 611 is greater than the thickness of the windward end 611b; and / or, the extension length of the first air guiding rib 611 is L, 4mm≤L≤15mm.

[0090] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0091] In some embodiments, in combination Figure 7 The thickness of the air outlet end 611a of the first air guiding rib 611 is greater than the thickness of the windward end 611b.

[0092] In the above technical solution, by setting the thickness of the air outlet end 611a of the first air guiding rib 611 to be greater than the thickness of the windward end 611b, the resistance of the windward end 611b to the airflow can be reduced, so that the airflow passes through the first air guiding rib 611 more smoothly.

[0093] Optionally, the thickness of the outlet end 611a of the first wind guide rib 611 is w1, and the thickness of the windward end 611b of the first wind guide rib 611 is w2, 1.5mm≤w1≤5mm, 1.5mm≤w2≤5mm, so that the outlet end 611a and the windward end 611b of the first wind guide rib 611 are within a suitable thickness range, so as to reduce the impact on the airflow. Optionally, the thickness w1 of the outlet end 611a of the first wind guide rib 611 can be 1.5mm, 2mm, 3mm, 4mm, or 5mm, etc.; the thickness w2 of the windward end 611b of the first wind guide rib 611 can be 1.5mm, 2mm, 3mm, 4mm, or 5mm, etc.

[0094] In some embodiments, in combination Figure 7 , the extension length of the first wind guiding rib 611 is L, 4mm≤L≤15mm.

[0095] For example, combined with Figure 7 , in the direction of the airflow flowing through the first air guide rib 611, the extension length of the first air guide rib 611 is L. Optionally, the extension length L of the first air guide rib 611 may be 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, or 15 mm.

[0096] In the above technical solution, by setting the extension length of the first wind guide rib 611 to be within a suitable range, the first wind guide rib 611 has a suitable length to guide the airflow, which is beneficial to improving the effect of guiding the airflow and can improve the wind dispersion effect of the outer area 61.

[0097] In the description of the present utility model, it is necessary to understand that the terms "length", "thickness", "upper", "lower", "front", "back", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0098] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0099] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0100] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fan, characterized in that: include: A first fan blade assembly and a second fan blade assembly, wherein the first fan blade assembly and the second fan blade assembly are spaced apart in an extending direction of a first rotation axis of the first fan blade assembly; An intermediate rectifying assembly is arranged between the first blade assembly and the second blade assembly, and the intermediate rectifying assembly includes a plurality of guide vanes arranged at intervals, and the guide vanes are used to guide the flow path of the airflow.

2. The fan according to claim 1, characterized in that The first fan blade assembly supplies air toward the second fan blade assembly, and the guide vane is arranged parallel to the first rotation axis.

3. The fan according to claim 2, characterized in that: The outer peripheral wall of the intermediate rectifying assembly is formed into a circular ring structure. The outer diameter of the intermediate rectifying assembly is smaller than the outer diameter of the first blade assembly and larger than the outer diameter of the second blade assembly.

4. The fan according to claim 1, characterized in that: The intermediate rectifying assembly comprises an intermediate seat and an outer ring, and the two ends of the guide vane are respectively connected to the intermediate seat and the outer ring; The fan further comprises a driving assembly, wherein the driving assembly is respectively connected to the first blade assembly and the second blade assembly to drive them to rotate, and the driving assembly is mounted to the intermediate seat.

5. The fan according to claim 4, characterized in that: The driving assembly comprises a mounting seat for placing the motor, the mounting seat is fixed to the middle seat, and a heat dissipation area is provided on a peripheral wall of the mounting seat.

6. The fan according to claim 1, characterized in that: It also includes an air guide tube for guiding air flow, and the first fan blade assembly, the intermediate rectifying assembly and the second fan blade assembly are respectively arranged in the air guide tube.

7. The fan according to claim 6, characterized in that: It also includes a plurality of connecting arms, which are arranged at intervals, and the two ends of each connecting arm are respectively connected to the middle rectifying assembly and the inner peripheral wall of the air guide cylinder.

8. The fan according to claim 1, characterized in that The first fan blade assembly includes a plurality of first fan blades, the second fan blade assembly includes a plurality of second fan blades, the rotation direction of the first fan blades is the same as the rotation direction of the second fan blades, and the first fan blades and the second fan blades have the same rotation direction.

9. The fan according to any one of claims 1 to 8, characterized in that: The first fan blade assembly includes a plurality of first fan blades, the second fan blade assembly includes a plurality of second fan blades, the diameter of the first fan blade is greater than the diameter of the second fan blade, and the first fan blade assembly supplies air toward the second fan blade assembly. The fan has a wind gathering mode and a wind dispersion mode. In the wind gathering mode, the rotation speed of the second fan blade is greater than or equal to the rotation speed of the first fan blade. In the wind dispersion mode, the rotation speed of the second fan blade is less than the rotation speed of the first fan blade. Or, In the wind gathering mode, the rotation speed of the second fan blade is greater than the rotation speed of the first fan blade, and in the wind dispersing mode, the rotation speed of the second fan blade is less than or equal to the rotation speed of the first fan blade.

10. The fan according to claim 9, characterized in that It also includes an air outlet mesh cover, which is arranged at the air outlet end of the second fan blade assembly, and the air outlet mesh cover includes a middle area and an outer area, the middle area is located radially inside the outer area, the middle area is configured to gather the airflow toward the direction of the first rotation axis, and the outer area is configured to diffuse the airflow in a direction away from the first rotation axis.

11. The fan according to claim 10, characterized in that The outer layer region includes a plurality of first air guiding ribs spaced apart in the circumferential direction, and an angle α is formed between an extension direction of the first air guiding ribs and the first rotation axis, and 5°≤α≤90°.

12. The fan according to claim 11, characterized in that The thickness of the wind outlet end of the first wind guiding rib is greater than the thickness of the windward end; and / or, The extension length of the first wind guiding rib is L, 4mm≤L≤15mm.

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