Fan blade assembly and portable fan

Abstract

The utility model relates to the technical field of fans, in particular to a fan blade assembly and a portable fan, the fan blade assembly provided by the utility model comprises a pressurizing piece which comprises a pressurizing seat and a plurality of stationary blades, and the plurality of stationary blades are arranged on the radial outer side of the pressurizing seat at intervals; the fan assembly and the pressurizing piece are sequentially arranged in the axial direction and comprise a rotating seat and a plurality of fan blades, the rotating seat comprises a rear air guide part, a fan blade connecting part and a front air guide part which are sequentially arranged in the axial direction, and the fan blades are arranged on the radial outer side of the fan blade connecting part at intervals; the interior of the supercharger penetrates through and surrounds the radial peripheries of the fan assembly and the pressurizing piece; a first gap is formed between the pressurizing base and the front air guide part in the axial direction, and the static blades extend backwards in the axial direction to cross the first gap and extend to the radial outer side of the front air guide part. The air flow sent out by the fan assembly is pressurized and accelerated, so that strong air flow is sent out, and the problems that the air force and the air speed of some existing portable fans are usually small, and the cooling effect can not meet the user requirement are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, especially a fan blade subassembly and portable fan. BACKGROUND

[0002] Portable fan is more and more popular in summer because of its miniaturization and light weight, and the characteristics of convenient carrying and using, and becomes the hot product in summer. With the progress of technology and the change of user demand, the user also puts forward new demand to portable fan.

[0003] The wind power and wind speed of the existing portable fan are usually small, especially in hot weather, and its cooling effect may not be sufficient to meet the user's demand. SUMMARY

[0004] To solve the problem that the wind power and wind speed of some existing portable fans are usually small and the cooling effect may not be sufficient to meet the user's demand, the utility model provides a fan blade subassembly and portable fan.

[0005] The technical problem of the utility model is solved by providing a fan blade subassembly, comprising:

[0006] The pressurizing part comprises a pressurizing seat and a plurality of vanes, and the plurality of vanes are arranged at the radial outer side of the pressurizing seat at intervals.

[0007] The fan assembly and the pressurizing part are arranged along the axis in sequence, and the fan assembly comprises a rotating seat and a plurality of fan blades.

[0008] The booster is internally through and surrounds the radial periphery of the fan assembly and the pressurizing part.

[0009] The first gap is formed between the pressurizing seat and the front air guide part in the axial direction, the vane extends axially beyond the first gap, and extends to the radial outer side of the front air guide part.

[0010] Preferably, the rear end of the vane corresponds to the position range of 1 / 3 to 2 / 3 of the front air guide part in the radial direction.

[0011] Preferably, the range of the first gap is 1.5-2.5mm.

[0012] Preferably, the vane comprises a vane tail end at the rear end, a vane root end radially inside and a vane top end radially outside, and the vane tail end extends obliquely from the vane root end to the vane top end.

[0013] Preferably, the fan blade comprises a fan blade head end, the second gap is formed between the axial direction of the fan blade head end and the vane tail end; the second gap gradually decreases from the vane root end to the vane top end.

[0014] Preferably, the second gap ranges from 1.5mm to 10mm.

[0015] Preferably, the vane comprises an arc-shaped extension part and a linear connecting part, the connecting part extends radially to connect the supercharger; the bending direction of the extension part is opposite to the bending direction of the fan blade.

[0016] Preferably, the installation angle of the fan blade is larger than the installation angle of the extension part, the installation angle of the fan blade ranges from 32° to 53°, and the installation angle of the extension part ranges from 14° to 30°.

[0017] Preferably, the distance between the fan blade top end of the fan blade and the inner surface of the supercharger ranges from 0.5mm to 3mm.

[0018] The utility model discloses a portable fan, including the fan blade subassembly as any one of the above, still include motor and power supply part, the motor is located in the fan blade subassembly, the power supply part is located the fan blade subassembly is outside, the power supply part with the motor electricity is connected, drives the fan subassembly rotates.

[0019] Compared with the prior art, the fan blade subassembly and the portable fan provided by the utility model have the following advantages:

[0020] 1. By setting the stator blades on the pressure base to extend axially backward, extending beyond the first gap formed between the pressure base and the front air guide section, and extending to the radial outer side of the front air guide section, the stator blades on the pressure base extend beyond the first gap and directly into the space between the front air guide section and the inner surface of the booster. This reduces the distance between the stator blades on the pressure base and the fan blades on the fan assembly, allowing most of the airflow delivered by the fan blades to be directly delivered to the pressure unit via the stator blades. This ensures the airflow volume and speed between the pressure unit and the fan assembly, so that the airflow delivered by the fan assembly is pressurized and accelerated with the help of the booster, resulting in a stronger airflow to the outside. Thus, through the design of the pressure unit and the booster, a strong airflow is ultimately delivered, resulting in a high-speed, high-pressure, and high-force airflow. This solves the problem that some existing portable fans typically have low wind power and speed, and the cooling effect may not be sufficient to meet the user's needs. In addition, the extension of the stationary blades on the pressurizing component ensures the airflow area and volume of the stationary blades extending into the inner surface of the front air guide and the pressurizer, thus ensuring the airflow between the fan blades and the stationary blades and reducing the airflow between the surface of the front air guide and the surface of the pressurizing base. This reduces the loss of airflow delivered by the fan blades at the first gap, so as to avoid the problem that the airflow delivered by the fan blades will be dispersed or disturbed due to the presence of the gap at the cross-section of the first gap, and that the airflow will be discontinuous at the cross-section, resulting in a decrease in wind speed.

[0021] 2. By setting the rear end of the stator blade, i.e. the extended part, to correspond to the position range of 1 / 3 to 2 / 3 of the front guide section, the extension of the stator blade passes through the gap between the pressure seat and the rotating seat, ensuring that the stator blade can extend to the front guide section and always maintain a certain distance from the stator blade on the fan assembly. This avoids the impact of the stator blade extension to the front guide section on the rotation of the fan assembly, and thus achieves direct airflow guidance with the airflow delivered by the fan blades without affecting the fan assembly.

[0022] 3. By setting the first gap to a range of 1.5-2.5mm, the first gap is minimized while avoiding contact with the fan assembly, thereby minimizing the loss of airflow delivered by the fan assembly at the first gap.

[0023] 4. By setting the trailing end of the stationary blade to extend at an angle from the root to the tip, the trailing end of the stationary blade near the fan blade is tilted towards the fan blade. This maximizes the distance between the part of the stationary blade near the fan assembly that connects to the pressure base and the front guide section, thus preventing the stationary blade at that point from contacting the fan assembly and affecting its rotation. In addition, the tilting setting causes the area of ​​the stationary blade extending into the front guide section to gradually increase in the direction away from the pressure base, thereby gradually increasing the air guiding area extending out of the pressure base, which facilitates efficient air guiding.

[0024] 5. By gradually reducing the second gap between the axial direction of the stationary blade from the root end to the tip end and the fan blade tip end, the air guiding distance between the stationary blade and the fan blade gradually decreases, which is conducive to efficient air guiding between the fan blade and the stationary blade. In addition, the direction of the decrease in air guiding distance corresponds to the direction of the air volume delivered by the fan blade on the fan assembly gradually increasing from the root end to the tip end, thus enabling a smoother transition between the air delivery and air guiding between the two.

[0025] 6. By controlling the second gap to be within the range of 1.5-10mm, the air guiding distance between the fan blade and the stationary blade can be minimized while ensuring no direct contact between the stationary blade and the fan blade, so as to achieve the optimal air guiding effect.

[0026] 7. By setting the bending direction of the extension to be opposite to that of the stationary blade, it is beneficial to achieve a natural arc transition between the fan blade and the stationary blade, making it easier for the airflow delivered by the fan blade to enter between the stationary blades and be combed by the stationary blade to form a direct current into the outside.

[0027] 8. By setting the installation angle of the fan blades to be greater than that of the stationary blades, the airflow delivered by the fan blades can be more smoothly guided between the stationary blades, reducing energy loss during airflow turning and making the airflow smoother. This allows the airflow to maintain a higher speed after entering the space between the stationary blades, thereby generating stronger wind pressure and enhancing the air delivery effect. In addition, the smooth airflow guidance between the two can effectively reduce noise.

[0028] 9. This utility model also provides a portable fan, which has the same beneficial effects as the above-mentioned fan blade assembly, and will not be described in detail here. [Attached Image Description]

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of the fan blade assembly provided in the first embodiment of the present invention.

[0031] Figure 2 This is a cross-sectional view of the fan blade assembly provided in the first embodiment of this utility model. Figure 1 .

[0032] Figure 3 This is an exploded structural diagram of the fan blade assembly provided in the first embodiment of this utility model.

[0033] Figure 4is Figure 2 Enlarged view of middle A.

[0034] Figure 5 is a sectional view of the pressurizing member of the fan blade assembly provided by the first embodiment of the utility model.

[0035] Figure 6 is a structural schematic view of the pressurizing member of the fan blade assembly provided by the first embodiment of the utility model.

[0036] Figure 7 is a structural schematic view of the fan assembly of the fan blade assembly provided by the first embodiment of the utility model.

[0037] Figure 8 is a sectional view of the fan blade assembly provided by the first embodiment of the utility model Figure 2 .

[0038] Figure 9 is Figure 8 Enlarged view of middle B.

[0039] Figure 10 is a three-dimensional structural schematic view of the portable fan provided by the second embodiment of the utility model.

[0040] Explanation of the figure mark:

[0041] 1, fan blade assembly; 2, power supply part; 3, portable fan;

[0042] 11, fan assembly; 12, supercharger; 13, pressurizing member; 14, motor; 15, shell; 17, back cover; 18, display assembly;

[0043] 111, rotating seat; 112, fan blade; 121, first cover; 122, second cover; 123, third cover; 131, pressurizing seat; 132, stationary blade; 151, air inlet end; 152, air outlet end;

[0044] 1111, rear air guide part; 1112, fan blade connecting part; 1113, front air guide part; 1114, mounting groove; 1121, fan blade top end; 1122, fan blade root end; 1123, fan blade head end; 1124, fan blade tail end; 1211, air outlet; 1231, air inlet; 1311, mounting cavity; 1321, connecting part; 1322, extension part; 1323, stationary blade top end; 1324, stationary blade root end; 1325, stationary blade head end; 1326, stationary blade tail end.

DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0046] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. Where an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. As used herein the terms "upper", "lower", "left", "right", and the like as used herein are used for explanation purposes only.

[0047] In the utility model, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0048] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For ordinary skilled persons in the art, the specific meaning of these terms in the utility model can be understood according to the specific circumstances.

[0049] In addition, the terms "mount", "set", "provided with", "connected", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication between two devices, elements or components. For ordinary skilled persons in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0050] Please refer to Figures 1-3The utility model discloses a first embodiment provides a kind of fan blade assembly 1, comprising: pressurizing piece 13, including pressurizing seat 131 and multiple static blades 132, multiple static blades 132 are arranged at the radial outer side of pressurizing seat 131 with interval;Fan assembly 11, and pressurizing piece 13 are sequentially arranged along the axial direction, fan assembly 11 includes rotating seat 111 and multiple fan blades 112, rotating seat 111 includes the rear air guide portion 1111, fan blade connecting portion 1112 and front air guide portion 1113 sequentially arranged along wind direction, multiple fan blades 112 are arranged with interval at the radial outer side of fan blade connecting portion 1112;Supercharger 12, inside through and surround the periphery of fan assembly 11;Wherein, the first gap C (such as Figure 2 As shown in C) is formed between pressurizing seat 131 and front air guide portion 1113 axially, static blade 132 extends axially to the rear and crosses the first gap C, and extends to the radial outer side of front air guide portion 1113.

[0051] Specifically, supercharger 12 is hollow structure, surrounds the radial periphery of fan assembly 11 and pressurizing piece 13 to enclose fan assembly 11 and pressurizing piece 13, so that the pressurization of wind flow is carried out in supercharger 12. Fan assembly 11 rotates to drive fan blade 112 to rotate to realize the high-speed flow of wind flow from rear air guide portion 1111 into the inside of supercharger 12, to send high-speed wind flow to pressurizing piece 13. Fan assembly 11 can be axial fan or inclined flow fan, and the embodiment does not limit this. Pressurizing piece 13 is fixed in the current position to realize the air guide between fan assembly 11, and sends wind flow to fan assembly 11 to realize pressurization. Static blade 132 on pressurizing seat 131 will also be fixed in the current position, keep still, to realize the air guide and carding of wind flow sent by fan blade 112. And to avoid the influence on the rotation of fan assembly 11, there is the first gap between pressurizing seat 131 and rotating seat 111 of fan assembly 11, to ensure the rotation effect of fan assembly 11. Rotating seat 111 includes the rear air guide portion 1111, fan blade connecting portion 1112 and front air guide portion 1113 sequentially arranged along the axial direction. Inside fan blade assembly 1, wind direction f (such as Figure 2The direction f) can be defined as the direction of the air flow in the axial direction of the fan assembly 11, that is, the rear guide portion 1111, the blade connecting portion 1112 and the front guide portion 1113 of the rotating seat 111 can be sequentially arranged along the direction of the air flow. The pressurizing member 13 and the fan assembly 11 can be sequentially arranged along the opposite direction of the direction f) of the air flow, that is, the fan assembly 11 and the pressurizing member 13 can be sequentially arranged along the direction f) of the air flow. The rear guide portion 1111 guides the part of the air flow entering the inside of the supercharger 12 along the surface of the rear guide portion 1111 into the blade connecting portion 1112 and to the blade 112 to push and accelerate, and the part of the air flow sent by the blade 112 is guided along the front guide portion 1113 into the surface of the pressurizing seat 131. The front guide portion 1113 is directly opposite to the pressurizing seat 131, that is, the first gap C is actually the gap between the end of the pressurizing seat 131 close to the fan assembly 11 and the front guide portion 1113.

[0052] It can be understood that the stator blades 132 of the pressurizing seat 131 extend beyond the first gap C formed between the pressurizing seat 131 and the fan assembly 11, and extend to or beyond the position corresponding to 1 / 3 of the front guide portion 1113. The stator blades 132 on the pressurizing seat 131 extend beyond the first gap C and directly extend into the radial outside of the front guide portion 1113, that is, between the front guide portion 1113 and the inner surface of the supercharger 12, thereby reducing the distance between the stator blades 132 on the pressurizing seat 131 and the fan blades 112 on the fan assembly 11, and making the fan blades 112 send most of the air flow directly to the pressurizing member 13 through the stator blades 132, ensuring the air volume and air speed of the air guide between the pressurizing member 13 and the fan assembly 11, so as to pressurize and speed up the air flow sent by the fan assembly 11 in cooperation with the supercharger 12, so as to send stronger air flow to the outside. Thus, through the arrangement of the pressurizing member 13 and the supercharger 12, the final sent air flow has high wind speed, high wind pressure and high wind power, thereby solving the problem that the wind power and wind speed of some existing portable fans are generally small, and the cooling effect may not be sufficient to meet the user's needs. In addition, compared with some existing portable fans that can perform turbine wind gathering, in the embodiment, the stator blades 132 on the pressurizing seat 131 extend beyond the first gap C and directly extend into the radial outside of the front guide portion 1113, thereby reducing the loss of the air flow sent by the fan blades 112 at the gap between the pressurizing seat 131 and the rotating seat 111, and further increasing the sent air volume. Moreover, the position of the stator blades 132 extending to the front guide portion 1113 is at least a position corresponding to 1 / 3 of the front guide portion 1113, which ensures the air guide area and air guide volume of the stator blades 132 extending into the front guide portion 1113 and the inner surface of the supercharger 12, so as to ensure the air volume between the fan blades 112 and the stator blades 132, reduce the air volume between the surface of the front guide portion 1113 and the surface of the pressurizing seat 131, thereby reducing the loss of the air volume sent by the fan blades 112 at the first gap C, so as to avoid the problem that the existence of the gap in the existing portable fan that can perform turbine wind gathering causes the air flow sent by the fan blades 112 to be dispersed or interfered at the cross section of the gap, and the air flow is discontinuous at the cross section, resulting in a decrease in wind speed.

[0053] It should be noted that in the embodiment, the pressurizing seat 131 can be coaxial with the rotating seat 111, that is, the axes of the two can coincide, so that the position correspondence between the pressurizing seat 131 and the rotating seat 111 is more accurate, thereby making the air guide between the two more balanced and stable.

[0054] More specifically, the fan blade assembly 1 in the embodiment can further include a housing 15, which also has a hollow through structure, and specifically has an air inlet end 151 and an air outlet end 152 formed according to the air flow direction f, the outer surface of the pressure booster 12 is connected to the inner surface of the housing 15, and the fan assembly 11 and the pressure boosting member 13 correspond to the air inlet end 151 and the air outlet end 152 of the housing 15, respectively, that is, the fan assembly 11 is arranged closer to the air inlet end 151 relative to the pressure boosting member 13, and the pressure boosting member 13 is arranged closer to the air outlet end 152 relative to the fan assembly 11. The pressure booster 12 is a structure applied to the air flow for pressure boosting and speed increasing independently of the housing 15, so that in the embodiment, the air flow is gradually pressurized by the pressure booster 12 in sequence with the pressure boosting seat 131 and the rotating seat 111, to improve the air pressure and speed of the finally delivered air flow. Rather than the housing 15 in sequence with the pressure boosting seat 131 and the rotating seat 111 to gradually pressurize the air flow. In addition, the arrangement of the pressure booster 12 makes the fan blade assembly 1 form a double-layer structure, which is more conducive to reducing noise and facilitating the obtaining of a portable fan 3 with high air pressure and low noise.

[0055] Please refer to Figure 2 , further, the rear end of the vane 132 corresponds to a position range of 1 / 3 to 2 / 3 of the front air guide part 1113 in the radial direction.

[0056] It can be understood that the rear end of the vane 132 is the end close to the fan assembly 11, that is, the part of the vane 132 extending to the radial outside of the front air guide part 1113 has a tip point, which is the point on the vane 132 closest to the fan blade 112 of the fan assembly 11. By arranging the tip point to correspond to a position range of 1 / 3 to 2 / 3 of the front air guide part 1113 in the radial direction, it is ensured that the vane 132 extends through the first gap C between the pressure boosting seat 131 and the rotating seat 111 and enters between the front air guide part 1113 and the pressure booster 12. And in this position range, it is ensured that the vane 132 can extend to the front air guide part 1113 and always maintain a certain distance from the vane 132 on the fan assembly 11, and it is ensured that the vane 132 corresponds to the air guide area of the front air guide part 1113 position range, so as to ensure the air guide effect. Thus, the part of the vane 132 extending to the front air guide part 1113 avoids affecting the rotation of the fan assembly 11, that is, under the premise that the position range can avoid the influence of the extension of the vane 132 on the fan assembly 11, the best effective air guide effect of the air flow delivered by the fan blade 112 is achieved.

[0057] Please refer to Figure 2 and Figure 4 , further, the range of the first gap is 1.5-2.5mm, so as to limit the range of the first gap to avoid contact with the fan assembly 11 while minimizing the first gap, thereby minimizing the loss of the air volume delivered by the fan assembly 11 at the first gap.

[0058] Referring to Figure 2 and Figure 4 Further, the vane 132 comprises a vane tail end 1326 at the rear end, and the vane 132 further comprises a vane root end 1324 at the radial inner end and a vane top end 1323 at the radial outer end, and the vane tail end 1326 extends obliquely from the vane root end 1324 to the vane top end 1323.

[0059] Specifically, the vane 132 comprises the vane top end 1323 and the vane root end 1324, and the vane leading end 1325 and the vane tail end 1326. The vane root end 1324 is the radial inner end of the vane 132, i.e. the end connected to the pressurizing seat 131; the vane top end 1323 is the radial outer end of the vane 132, i.e. the end away from the vane root end 1324, i.e. the end close to the inner surface of the supercharger 12; the vane leading end 1325 is the end away from the fan assembly 11, and corresponds to the end of the air outlet end 152 of the shell 15; and the vane tail end 1326 is the end close to the fan assembly 11. That is, the vane leading end 1325 is closer to the air outlet end 152 of the shell 15 than the vane tail end 1326, so that the vane leading end 1325 of the vane 132 is in front and the vane tail end 1326 of the vane 132 is in back along the direction close to the air outlet end 152 of the shell 15.

[0060] It can be understood that the vane tail end 1326 extends obliquely from the vane root end 1324 to the vane top end 1323, so that the vane tail end 1326 of the vane 132 is obliquely arranged, and the vane tail end 1326 of the vane 132 is obliquely arranged towards the fan assembly 11, so that the radial length of the extension part of the vane 132 between the front air guiding part 1113 and the inner surface of the supercharger 12 gradually decreases from the vane top end 1323 to the vane root end 1324, and the vane root end 1324 is the end not extending out of the pressurizing seat 131. That is, the distance between the vane root end 1324 and the front air guiding part 1113 is the maximum, and the distance is within the distance range of the first gap between the pressurizing seat 131 and the front air guiding part 1113. The oblique arrangement can avoid the extension of the vane 132 from contacting the rotating seat 111, and further avoid the influence of the extension of the vane 132 on the rotation of the fan assembly 11. In addition, the oblique arrangement makes the area of the vane 132 extending into the front air guiding part 1113 gradually increase along the direction away from the pressurizing seat 131, so as to gradually increase the air guiding area extending out of the pressurizing seat 131, and facilitate high-efficiency air guiding.

[0061] Referring to Figure 2 and Figure 4 Further, the vane 132 comprises a vane tail end 1326 at the rear end, and the vane 132 further comprises a vane root end 1324 at the radial inner end and a vane top end 1323 at the radial outer end, and the vane tail end 1326 extends obliquely from the vane root end 1324 to the vane top end 1323. Figure 4The second gap P gradually decreases from the root end 1324 of the stationary vane to the top end 1323 of the stationary vane.

[0062] Specifically, the fan blade 112 comprises a top end 1121 and a root end 1122, a leading end 1123 and a trailing end 1124. The root end 1122 is one end of the fan blade connecting portion 1112; the top end 1121 is an end away from the root end 1122, i.e. an end close to the inner surface of the supercharger 12; the leading end 1123 is an end close to the pressurizing member 13; and the trailing end 1124 is an end away from the pressurizing member 13 and corresponding to the air outlet end 152 of the shell 15 and the air inlet 1231 of the supercharger 12. That is, the leading end 1123 is closer to the air outlet end 152 of the shell 15 than the trailing end 1124, so that the leading end 1123 of the fan blade 112 is in front and the trailing end 1124 of the fan blade 112 is behind in the direction close to the air outlet end 152 of the shell 15.

[0063] It can be understood that the second gap P between the stationary vane 132 of the pressurizing member 13 and the fan blade 112 can ensure that the stationary vane 132 and the fan blade 112 are not in direct contact, thereby avoiding the influence of the stationary vane 132 on the rotation of the fan blade 112. The direction in which the second gap P decreases can be the same as the direction in which the axial length of the trailing end 1326 of the stationary vane 132 gradually increases, so that the air guiding distance between the stationary vane 132 and the fan blade 112 gradually decreases in the direction away from the rotating seat 111, and the decrease of the air guiding distance is more conducive to the efficient air guiding between the fan blade 112 and the stationary vane 132. In addition, the direction in which the air guiding distance decreases corresponds to the direction in which the air volume of the fan blade 112 gradually increases from the root end 1122 to the top end 1121 on the fan assembly 11, so that the air guiding between the fan blade 112 and the stationary vane 132 can be more smoothly transitioned.

[0064] Referring to Figure 4 Further, the second gap P ranges from 1.5 mm to 10 mm, so as to ensure that the air guiding distance between the stationary vane 132 and the fan blade 112 is as small as possible under the condition that the stationary vane 132 and the fan blade 112 are not in direct contact, so as to achieve the optimal air guiding effect.

[0065] Referring to Figures 3-5 Further, the stationary vane 132 comprises an arc-shaped extension portion 1322 and a linear connecting portion 1321, the connecting portion 1321 extends radially to connect the supercharger 12, and the extension portion 1322 is curved in a direction opposite to the stationary vane 132.

[0066] Specifically, the connecting part 1321 connects to the booster 12, enabling the connection between the pressurizing component 13 and other components of the portable fan 3. It also secures the stationary blades 132 on the pressurizing base 131. The connection between the connecting part 1321 and the booster 12 prevents the stationary blades 132 from shaking, strengthening the overall structural strength of the pressurizing component 13, reducing vibration, and making the entire fan blade assembly 1 operate more stably and smoothly. When the connecting part 1321 is straight, its shape is perpendicular to the surface of the connecting cover and the pressurizing base 131, giving it better strength and rigidity. This effectively resists the axial load of the booster 12, improving the firmness and stability of the connection. When the extension part 1322 is arc-shaped, it more effectively guides the airflow from the fan blades, increasing the smoothness and stability of the airflow. The bending direction of the extension 1322 is opposite to that of the stationary blade 132, which helps to achieve a natural arc transition between the fan blade 112 and the stationary blade 132, making it easier for the airflow delivered by the fan blade 112 to enter between the stationary blades 132 and be combed by the stationary blades 132 to form a direct current into the outside.

[0067] Please see Figure 6 and Figure 7 Furthermore, the mounting angle β of the fan blade 112 (e.g.) Figure 7 As shown, β) is greater than the mounting angle β of the extension 1322 (e.g. Figure 6 As shown in α), the mounting angle β of the fan blade 112 is 32-53°, and the mounting angle α of the extension 1322 is 14-30°.

[0068] Understandably, when the installation angle β of the fan blade 112 is greater than the installation angle α of the extension 1322, the curvature of the fan blade 112 is greater than that of the stationary blade 132. This facilitates a smoother flow of air from the fan blade 112 into the space between the stationary blades 132, reducing energy loss during airflow transition and ensuring smoother airflow. This allows the airflow to maintain a higher velocity after entering the space between the stationary blades 132, resulting in stronger air pressure and enhanced air delivery. Furthermore, the smooth airflow guidance between the two effectively reduces noise. In addition, the smaller installation angle of the fan blade 112 facilitates a smoother transition between the curved extension 1322 and the straight connection, making the transition at the connection point more natural. In addition, by setting the angle range of the mounting angle β of the fan blade 112 and the mounting angle α of the extension 1322, the degree of bending of the fan blade 112 and the extension 1322 is limited, so that the degree of bending achieved by the fan blade 112 and the extension 1322 within the set range can achieve better air delivery and air guiding effects.

[0069] Please see Figure 8 and Figure 9 Furthermore, the distance L between the tip 1121 of the fan blade 112 and the inner surface of the turbocharger 12 (e.g., ...) Figure 9L) is 0.5-3mm, in the range, can ensure that the fan blade 112 and the inner surface of the supercharger 12 without direct contact, and as far as possible to reduce the fan blade 112 fan blade top 1121 and the inner surface of the supercharger 12 between the distance L, to reduce the fan blade 112 sent by the wind flow between the top of the fan blade 112 and the supercharger 12, so as to ensure the fan assembly 11 on the wind speed and the amount of wind.

[0070] Specifically, the number of fan blades 112 in the embodiment is greater than the number of static blades 132, so that the spacing between adjacent fan blades 112 is greater than the spacing between adjacent static blades 132, so that there is a greater wind guide range between the static blades 132, which is more conducive to the wind guide between the fan blades 112 and the static blades 132. In addition, the larger spacing between adjacent static blades 132 can reduce the resistance of the wind flow between the static blades 132, thereby improving the working efficiency of the fan assembly 1 and obtaining stronger wind output.

[0071] It can be understood that the supercharger 12 includes an air inlet 1231 and an air outlet 1211, and the radial diameter of the supercharger 12 gradually increases from the air inlet 1231 to the air outlet 1211. The supercharger 12 includes a first cover 121, a second cover 122 and a third cover 123 connected in an axial direction, the first cover 121 surrounds the pressurizing seat 131, a plurality of static blades 132 are arranged at intervals outside the pressurizing seat 131 and connected to the first cover 121. The fan assembly 1 further comprises a rear cover 17, the rear cover 17 connects the housing 15 and the second cover 122 through the third cover 123. The first cover 121, the second cover 122 and the third cover 123 are all hollow structures, so that the supercharger 12 formed by connecting the three can surround the radial periphery of the pressurizing seat 131 and the fan assembly 11. The first cover 121 forms an air outlet 1211 corresponding to the air outlet end 152 of the housing 15 and the pressurizing member 13, the third cover 123 forms an air inlet 1231 corresponding to the air inlet end 151 of the housing 15, and the two ends of the second cover 122 are connected to the first cover 121 and the third cover 123 respectively and the outer surface of the second cover 122 abuts against the inner surface of the housing 15.

[0072] Please refer to Figure 10 The utility model discloses a second embodiment further provides a kind of portable fan 3, including the fan blade assembly 1 in any one described in the first embodiment, further include motor 14 and power supply part 2, motor 14 is located in fan blade assembly 1, power supply part 2 is located outside fan blade assembly 1, power supply part 2 and motor 14 are electrically connected, to drive fan assembly 11 rotation.

[0073] It can be understood that the portable fan 3 includes the fan blade assembly 1 and the power supply part 2 connected with the fan blade assembly 1. The power supply part 2 and the motor 14 are electrically connected to supply power to the motor 14, drive the fan assembly 11 to rotate, and blow out the air flow. The power supply part 2 can be a handheld assembly for a user to hold and use, or stand on a plane, and the fan blade assembly 1 is used to blow air to the user. In the embodiment, the portable fan 3 is a handheld fan, and of course, in other embodiments, the portable fan 3 can be a small fan only with the above-mentioned fan blade assembly 1, and can also be a desktop fan, a clip fan, a changeable fan, and the like. The present embodiment does not make a limitation, and it is only required that the power supply part 2 can supply power to the motor 14 in the fan blade assembly 1. And since the portable fan 3 includes the fan blade assembly 1 described in any one of the first embodiments, it has the same technical effects as the fan blade assembly 1 in the first embodiment, and the present embodiment does not make a limitation.

[0074] Please refer to Figure 3 Specifically, the rotating seat 111 is provided with a mounting groove 1114 on the side close to the pressing member 13, the pressing member 13 is provided with a mounting cavity 1311 on the side close to the rotating seat 111, the mounting groove 1114 and the mounting cavity 1311 are opposite to each other and form a mounting space, and the motor 14 is accommodated in the mounting space. The fan assembly 11 is specifically driven by the motor 14 to rotate as a whole, so as to drive the fan blade 112 to rotate.

[0075] It can be understood that the fan blade assembly 1 further includes a display assembly 18, and the display assembly 18 is arranged on the side of the pressing seat 131 away from the fan assembly 11. The display assembly 18 can be used to display at least one of the power, the current gear, and the charging state.

[0076] Compared with the prior art, the fan blade assembly and the portable fan provided by the utility model have the following advantages:

[0077] 1. By setting the stator blades on the pressure base to extend axially backward, extending beyond the first gap formed between the pressure base and the front air guide section, and extending to the radial outer side of the front air guide section, the stator blades on the pressure base extend beyond the first gap and directly into the space between the front air guide section and the inner surface of the booster. This reduces the distance between the stator blades on the pressure base and the fan blades on the fan assembly, allowing most of the airflow delivered by the fan blades to be directly delivered to the pressure unit via the stator blades. This ensures the airflow volume and speed between the pressure unit and the fan assembly, so that the airflow delivered by the fan assembly is pressurized and accelerated with the help of the booster, resulting in a stronger airflow to the outside. Thus, through the design of the pressure unit and the booster, a strong airflow is ultimately delivered, resulting in a high-speed, high-pressure, and high-force airflow. This solves the problem that some existing portable fans typically have low wind power and speed, and the cooling effect may not be sufficient to meet the user's needs. In addition, the extension of the stationary blades on the pressurizing component ensures the airflow area and volume of the stationary blades extending into the inner surface of the front air guide and the pressurizer, thus ensuring the airflow between the fan blades and the stationary blades and reducing the airflow between the surface of the front air guide and the surface of the pressurizing base. This reduces the loss of airflow delivered by the fan blades at the first gap, so as to avoid the problem that the airflow delivered by the fan blades will be dispersed or disturbed due to the presence of the gap at the cross-section of the first gap, and that the airflow will be discontinuous at the cross-section, resulting in a decrease in wind speed.

[0078] 2. By setting the rear end of the stator blade, i.e. the extended part, to correspond to the position range of 1 / 3 to 2 / 3 of the front guide section, the extension of the stator blade passes through the gap between the pressure seat and the rotating seat, ensuring that the stator blade can extend to the front guide section and always maintain a certain distance from the stator blade on the fan assembly. This avoids the impact of the stator blade extension to the front guide section on the rotation of the fan assembly, and thus achieves direct airflow guidance with the airflow delivered by the fan blades without affecting the fan assembly.

[0079] 3. By setting the first gap to a range of 1.5-2.5mm, the first gap is minimized while avoiding contact with the fan assembly, thereby minimizing the loss of airflow delivered by the fan assembly at the first gap.

[0080] 4. By setting the trailing end of the stationary blade to extend at an angle from the root to the tip, the trailing end of the stationary blade near the fan blade is tilted towards the fan blade. This maximizes the distance between the part of the stationary blade near the fan assembly that connects to the pressure base and the front guide section, thus preventing the stationary blade at that point from contacting the fan assembly and affecting its rotation. In addition, the tilting setting causes the area of ​​the stationary blade extending into the front guide section to gradually increase in the direction away from the pressure base, thereby gradually increasing the air guiding area extending out of the pressure base, which facilitates efficient air guiding.

[0081] 5. By gradually reducing the second gap between the axial direction of the stationary blade from the root end to the tip end and the fan blade tip end, the air guiding distance between the stationary blade and the fan blade gradually decreases, which is conducive to efficient air guiding between the fan blade and the stationary blade. In addition, the direction of the decrease in air guiding distance corresponds to the direction of the air volume delivered by the fan blade on the fan assembly gradually increasing from the root end to the tip end, thus enabling a smoother transition between the air delivery and air guiding between the two.

[0082] 6. By controlling the second gap to be within the range of 1.5-10mm, the air guiding distance between the fan blade and the stationary blade can be minimized while ensuring no direct contact between the stationary blade and the fan blade, so as to achieve the optimal air guiding effect.

[0083] 7. By setting the bending direction of the extension to be opposite to that of the stationary blade, it is beneficial to achieve a natural arc transition between the fan blade and the stationary blade, making it easier for the airflow delivered by the fan blade to enter between the stationary blades and be combed by the stationary blade to form a direct current into the outside.

[0084] 8. By setting the installation angle of the fan blades to be greater than that of the stationary blades, the airflow delivered by the fan blades can be more smoothly guided between the stationary blades, reducing energy loss during airflow turning and making the airflow smoother. This allows the airflow to maintain a higher speed after entering the space between the stationary blades, thereby generating stronger wind pressure and enhancing the air delivery effect. In addition, the smooth airflow guidance between the two can effectively reduce noise.

[0085] 9. This utility model also provides a portable fan, which has the same beneficial effects as the above-mentioned fan blade assembly, and will not be described in detail here.

[0086] The present invention has provided a detailed description of a fan blade assembly and a portable fan according to embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention. Any modifications, equivalent substitutions, and improvements made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leaf assembly, characterized by: include: A pressurizing component includes a pressurizing base and multiple stationary vanes, wherein the multiple stationary vanes are spaced apart on the radially outer side of the pressurizing base; The fan assembly and the pressurizing component are arranged sequentially along the axial direction. The fan assembly includes a rotating base and multiple fan blades. The rotating base includes a rear air guide, a fan blade connecting part and a front air guide part arranged sequentially along the axial direction. The multiple fan blades are arranged at intervals on the radially outer side of the fan blade connecting part. A supercharger, internally penetrating and surrounding the radial periphery of the fan assembly and the pressurizing element; A first gap is formed between the pressurizing seat and the front guide air section in the axial direction. The stationary blade extends axially backward across the first gap and extends to the radial outer side of the front guide air section.

2. The leaf assembly of claim 1, wherein: The rear end of the stator blade corresponds to a position range of 1 / 3 to 2 / 3 of the radially mapped position of the front guide vane.

3. The leaf assembly of claim 1, wherein: The first gap ranges from 1.5 to 2.5 mm.

4. The leaf assembly of claim 1, wherein: The stationary leaf includes a stationary leaf tail end at the rear end, and the stationary leaf also includes a stationary leaf root end in the radial direction and a stationary leaf tip in the radial direction, with the stationary leaf tail end extending obliquely from the stationary leaf root end to the stationary leaf tip.

5. The leaf assembly of claim 4, wherein: The fan blade includes a front end, and a second gap is formed between the rear end of the stationary blade and the front end of the fan blade in the axial direction; the second gap gradually decreases from the root end of the stationary blade to the tip end of the stationary blade.

6. The leaf assembly of claim 5, wherein: The second gap ranges from 1.5 to 10 mm.

7. The leaf assembly of claim 1, wherein: The stationary blade includes an arc-shaped extension and a straight connecting portion, the connecting portion extending radially to connect to the turbocharger; the bending direction of the extension is opposite to the bending direction of the fan blade.

8. The leaf assembly of claim 7, wherein: The mounting angle of the fan blade is greater than the mounting angle of the extension. The mounting angle of the fan blade is 32-53°, and the mounting angle of the extension is 14-30°.

9. The leaf assembly of claim 1, wherein: The distance between the tip of the fan blade and the inner surface of the turbocharger is 0.5-3 mm.

10. A portable fan characterized by: The fan assembly includes the fan blade assembly as described in any one of claims 1-9, and further includes a motor and a power supply unit, wherein the motor is disposed inside the fan blade assembly, the power supply unit is disposed outside the fan blade assembly, and the power supply unit and the motor are electrically connected to drive the fan assembly to rotate.

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