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 shell which is internally through and comprises an air inlet end and an air outlet end; the fan assembly comprises a rotating seat and a plurality of fan blades; the pressurizing piece and the fan assembly are sequentially arranged in the axial direction and correspond to the air outlet end and the air inlet end respectively, and the pressurizing piece comprises a pressurizing base and a plurality of static blades; the pressurizer is arranged in the shell, and the interior of the pressurizer penetrates through and surrounds the radial peripheries of the fan assembly and the pressurizing piece; wherein the static blades extend in the radial direction to be connected with the pressurizing base and the supercharger, and extend out of the pressurizing base in the axial direction, so that the distance between the static blades on the fan assembly and the fan blades on the pressurizing base is reduced, air flow sent out by the fan blades is better and efficiently transmitted to the pressurizing piece in a transition mode, and the loss of the air quantity sent out by the fan assembly in the shell is reduced; and the air volume is further increased.

Description

TECHNICAL FIELD

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

[0002] At present, some portable fans have appeared on the market by setting up air guide structure inside to guide the air entering the inside of portable fan and send out, reach the effect of guiding.

[0003] But this kind of portable fan with air guide structure, the air guide structure inside and the fan exist certain distance, easily increase the loss of fan sent out air volume. INVENTION CONTENTS

[0004] To solve the existing portable fan with pressure increasing structure, because the pressure increasing structure inside and the fan exist certain distance, easily increase the loss of fan sent out air volume, the utility model provides a fan blade subassembly and portable fan.

[0005] The utility model solves technical problem's scheme provides a fan blade subassembly, include:

[0006] Shell, inside through and include air inlet end and air outlet end;

[0007] Fan subassembly, including rotation seat and multiple fan blades;

[0008] Pressure increasing piece, and the fan subassembly along the axial direction setting and respectively corresponding air outlet end and air inlet end, the pressure increasing piece includes pressure increasing seat and multiple stationary vanes;

[0009] Booster, set up in the shell inside, and inside through and surround the radial periphery of fan subassembly and pressure increasing piece;

[0010] Among them, the stationary vane radially extends and connects the pressure increasing seat and the booster, and the stationary vane axially extends beyond the pressure increasing seat.

[0011] Preferably, the rotation seat includes the rear air guide portion, the fan blade connecting portion and the front air guide portion arranged along the axial direction in sequence, the radial radius of the rotation seat gradually increases from the rear air guide portion to the fan blade connecting portion, and the stationary vane axially extends to between the front air guide portion and the inner surface of the booster.

[0012] Preferably, the booster includes the first cover, the second cover and the third cover connected along the axial direction in sequence, the first cover surrounds the outside of the pressure increasing seat, multiple stationary vanes are arranged at intervals outside the pressure increasing seat and connected to the first cover.

[0013] Preferably, the stationary vane comprises a connecting portion and an extending portion, the connecting portion is located between the pressurizing seat and the first cover and connects the pressurizing seat and the first cover respectively, the extending portion comprises a portion located between the pressurizing seat and the second cover and a portion located between the front air guide portion and the second cover, the extending portion extends axially from the connecting portion to the front air guide portion and the inner surface of the supercharger.

[0014] Preferably, the inner surfaces of the first cover, the second cover and the third cover are smoothly connected to form a first air flow channel surface, and the extending portion extends between the front air guide portion and the first air flow channel surface.

[0015] Preferably, the first air flow channel surface is radially convex to form an arc surface, the supercharger comprises an air inlet and an air outlet, and the radial diameter of the supercharger gradually increases from the air inlet to the air outlet, the radial diameter of the air inlet of the supercharger is 44.9-48.9mm, and the radial diameter of the air outlet of the supercharger is 53.4-57.4mm.

[0016] Preferably, the gap width between the top end of the stationary vane of the extending portion and the inner surface of the supercharger is smaller than the gap width between the top end of the fan blade and the inner surface of the supercharger.

[0017] Preferably, the gap width between the top end of the stationary vane of the extending portion and the inner surface of the supercharger is the same from one end of the extending portion close to the fan blade to the other end of the extending portion away from the fan blade, and the gap width between the top end of the stationary vane of the extending portion and the inner surface of the supercharger is 0.

[0018] Preferably, the radial radius of part of the pressurizing seat gradually increases from one end close to the rotating seat to the other end away from the rotating seat, and the radial radius of the one end of the pressurizing seat close to the rotating seat is the same as the radial radius of the one end of the front air guide portion close to the pressurizing seat.

[0019] The utility model discloses a portable fan, including the fan blade subassembly of 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 in the fan blade subassembly outside, the power supply part with the motor electricity is connected to drive the fan subassembly rotates.

[0020] Compared with the prior art, the fan blade subassembly and the portable fan provided by the utility model have the following advantages:

[0021] 1. The pressure mount provided in this embodiment has radially extending stator blades connecting the pressure mount and the booster, and axially extending stator blades beyond the pressure mount. Extending the stator blades axially towards the fan assembly beyond the pressure mount reduces the distance between the stator blades on the fan assembly and the fan blades on the pressure mount, allowing for a more efficient and effective transfer of the airflow from the fan blades to the pressure mount, reducing airflow loss within the housing, and thus increasing airflow. Furthermore, extending the stator blades axially away from the fan assembly beyond the pressure mount increases the airflow guidance distance in the corresponding area at the air outlet, which is more conducive to airflow guidance.

[0022] 2. By setting the stator blades to extend axially from the pressure base into the intensifier, and further extending to the area between the front guide section and the inner surface of the intensifier, the distance between the fan blades on the fan assembly and the stator blades on the pressure base is further reduced. This allows the airflow delivered by the fan blades to be transferred to the pressure unit more efficiently. Furthermore, since the stator blades extend through the gap between the pressure base and the rotating base, the fan blades directly transfer the airflow to the stator blades on the rotating base, thereby reducing airflow loss at the gap between the pressure base and the rotating base and increasing the delivered air volume.

[0023] 3. By setting up a booster consisting of a first cover, a second cover, and a third cover connected in sequence, the booster can pressurize and accelerate the airflow inside the booster through the cooperation of the booster, the pressurizing component, and the rotating base. Furthermore, the first cover connecting the stationary blades can fix the stationary blades on the pressurizing base, preventing the stationary blades from shaking, strengthening the overall structural strength of the pressurizing component, reducing vibration, and making the entire fan blade assembly operate more stably and smoothly.

[0024] 4. By setting the connecting part and the extension part of the stationary blade, the extension part protrudes relative to the first cover and the pressurizing seat, and the protruding part extends into the space between the front air guide and the inner surface of the pressurizer, thereby crossing the gap between the pressurizing seat and the front air guide to complete the efficient airflow between the fan blades.

[0025] 5. By setting the inner surfaces of the first cover, second cover and third cover to form a smooth transition to form the first airflow channel surface, the airflow can pass through the first airflow channel surface more smoothly, avoiding the loss of airflow delivered by the fan blades at the connection point of the three.

[0026] 6、By setting the radial diameter of the booster gradually increases from the air inlet to the air outlet direction, so that the first wind flow channel surface transition more natural and gentle, the realization of the gradual increase of the fan to send the wind flow, the process of the wind flow more stable, to ensure the stability of the wind flow in the process of pressure increasing, thereby reducing the fluctuation and vortex phenomenon of the wind flow, improve the overall wind flow stability; and by setting the radial diameter of the air inlet of the booster is 44.9-48.9mm, the radial diameter of the air outlet is 53.4-57.4mm, so as to limit the radial diameter range of the booster, thereby limiting the upper and lower range of the pressure increasing of the booster, avoiding the pressure increasing range too large to affect the stability of the wind flow and produce greater noise.

[0027] 7、By setting the gap width between the static blade top end of the extension and the inner surface of the booster is less than the gap width between the blade top end of the fan and the inner surface of the booster, the wind flow transmitted by the fan can be reduced to reduce the wind speed, thereby ensuring that most of the wind flow transmitted by the fan can be transmitted by the static blade at high wind speed.

[0028] 8、By setting the gap width between the static blade top end of the extension and the inner surface of the booster is the same, and the gap width is 0, the static blade top end of the extension directly abuts the inner surface of the second cover, so as to improve the stability of the connection between the booster and the pressure increasing part, and further improve the stability of the flow guiding and pressure increasing speed of the wind flow between the two.

[0029] 9、The utility model also provides a portable fan, has same beneficial effect with above-mentioned fan blade assembly, and does not make superfluous repetition here.

DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0031] Figure 1 It is the three-dimensional structure schematic diagram of the fan blade assembly provided by the first embodiment of the utility model.

[0032] Figure 2 It is the cutaway schematic diagram of the fan blade assembly provided by the first embodiment of the utility model.

[0033] Figure 3 It is the explosion structure schematic diagram of the fan blade assembly provided by the first embodiment of the utility model.

[0034] Figure 4It is the section view schematic diagram of the fan assembly of the fan blade assembly provided by the first embodiment of the utility model.

[0035] Figure 5 It is the section view schematic diagram of the pressurizing piece of the fan blade assembly provided by the first embodiment of the utility model.

[0036] Figure 6 It is the section view schematic diagram of the partial structure of the fan blade assembly provided by the first embodiment of the utility model.

[0037] Figure 7 It is Figure 2 The enlarged view of A in the figure.

[0038] Figure 8 It is the three-dimensional structure schematic diagram of the portable fan provided by the second embodiment of the utility model.

[0039] The figure mark explanation is as follows:

[0040] 1, fan blade assembly;2, power supply part;3, portable fan;

[0041] 11, fan assembly;12, supercharger;13, pressurizing piece;14, motor;15, shell;16, first air flow passage surface;17, back cover;18, display assembly;

[0042] 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;

[0043] 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

[0044] In order to make the utility model's purpose, technical scheme and advantage more clearly, the following is combined with the figure and the embodiment of implementation, and the utility model is further detailedly explained.It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0045] 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. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right", and similar expressions as used herein are for illustrative purposes only.

[0046] In the present application, 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 present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0047] In addition, in addition to indicating 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 those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0048] In addition, the terms "mounting", "setting", "providing", "connecting", "connecting" 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 internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] Please refer to Figures 1-3 The first embodiment of the present application provides a fan blade assembly 1, which comprises: a shell 15, which is internally through and comprises an air inlet end 151 and an air outlet end 152; a fan assembly 11, which comprises a rotating seat 111 and a plurality of fan blades 112; a pressurizing part 13, which is sequentially arranged along the axial direction with the fan assembly 11 and corresponds to the air outlet end 152 and the air inlet end 151 respectively, and comprises a pressurizing seat 131 and a plurality of static blades 132; a booster 12, which is arranged inside the shell 15 and internally through and surrounds the radial periphery of the fan assembly 11 and the pressurizing part 13; wherein the static blades 132 radially extend to connect the pressurizing seat 131 and the booster 12, and the static blades 132 axially extend beyond the pressurizing seat 131.

[0050] Specifically, the housing 15 has a hollow, through-hole structure, including an air inlet 151 and an air outlet 152. The air inlet is the port for external airflow to enter the housing, and the air outlet is the port for discharging the airflow into the housing to the outside. The outer surface of the booster 12 is connected to the inner surface of the housing 15. That is, the booster 12 is a structure that pressurizes the airflow independently of the housing 15. Thus, in this embodiment, the airflow is gradually pressurized and accelerated by the booster 12 in sequence with the pressurizing seat 131 and the rotating seat 111, thereby increasing the air pressure and speed of the final delivered airflow. This is not achieved by the housing 15 in sequence with the pressurizing seat 131 and the rotating seat 111. In addition, the booster 12 makes the fan blade assembly 1 form a double-layer structure, which is more conducive to reducing noise and facilitating the production of a high-pressure, low-noise portable fan 3.

[0051] More specifically, the fan assembly 11 can accelerate the airflow entering the supercharger 12 from the inlet 151 and then expel it through rotation. The fan assembly 11 can be an axial fan or a diagonal fan; this embodiment is not limited to either. The airflow direction f (e.g., ...) Figure 2 As shown in f), the direction of airflow in the fan assembly 11 along the axial direction of the fan assembly 11 can be defined as the direction from the airflow into the fan assembly 11 to the airflow out of the fan assembly 11 along the axial direction of the fan assembly 11. That is, the pressurizing member 13 and the fan assembly 11 can be arranged sequentially in the opposite direction of the airflow direction f, i.e., the fan assembly 11 and the pressurizing member 13 are arranged sequentially along the airflow direction f, so that the fan assembly 11 and the pressurizing member 13 correspond to the air inlet end 151 and the air outlet end 152 of the housing 15, respectively. In other words, the fan assembly 11 is positioned closer to the air inlet end 151 relative to the pressurizing member 13, and the pressurizing member 13 is positioned closer to the air outlet end 152 relative to the fan assembly 11. The pressurizing seat 131 and the stationary blade 132 of the pressurizing member 13 correspond to the rotating seat 111 and the fan blade 112 of the fan assembly 11, respectively, so that the airflow delivered from the fan blade 112 on the fan assembly 11 is delivered out through the stationary blade 132 and the rotating seat 111. The booster 12 may be a hollow annular structure, so that it can surround the radial periphery of the fan assembly 11 to enclose the entire fan assembly 11 and the pressurizing element 13.

[0052] It can be understood that the static vane 132 of the pressurizing seat 131 can be arranged to extend radially to connect the pressurizing seat 131 and the booster 12, and the static vane 132 extends axially beyond the pressurizing seat 131. The static vane 132 extends axially to reduce the distance between the static vane 132 on the fan assembly 11 and the fan blade 112 on the pressurizing seat 131, so as to better transition the air flow sent out by the fan blade 112 to the pressurizing member 13, reduce the loss of the air flow sent out by the fan assembly 11 inside the housing 15, and thus improve the air flow. In addition, the static vane 132 extends axially beyond the pressurizing seat 131 away from the fan assembly 11, which can improve the air guiding distance of the corresponding area of the air outlet end 152, and is more conducive to air guiding.

[0053] Please refer to Figure 3 and Figure 4 Further, the rotating seat 111 comprises a rear air guiding portion 1111, a fan blade connecting portion 1112 and a front air guiding portion 1113 arranged in sequence along the axial direction; the radial radius of the rotating seat 111 gradually increases from the rear air guiding portion 1111 to the fan blade connecting portion 1112; the static vane 132 extends axially between the front air guiding portion 1113 and the inner surface of the booster 12

[0054] Specifically, the rear air guiding portion 1111, the fan blade connecting portion 1112 and the front air guiding portion 1113 are arranged in sequence along the axial direction, i.e., arranged in sequence along the air flow direction f. The fan blade 112 is arranged in a spiral extending manner in the fan blade connecting portion 1112, thereby forming the fan assembly 11 with the whole rotating seat 111. The arrangement of the front air guiding portion 1113 can more evenly guide the part of the air flow entering the booster 12 to the fan blade 112. The arrangement of the rear air guiding portion 1111 can guide the part of the air flow accelerated by the fan blade 112 to the opposite rotating seat 111, thereby reducing the loss of the air flow caused by the cross section of the blade root of the fan blade 112. The axial length of the fan blade connecting portion 1112 can be greater than the axial length of the front air guiding portion 1113 and the axial length of the rear air guiding portion 1111, so as to more effectively push the air flow and reduce the air flow separation phenomenon, thereby improving the air flow efficiency and the air pressure of the whole fan assembly 11. Optionally, the axial length of the fan blade connecting portion 1112 is between 1 / 2 and 3 / 4 of the length of the whole rotating seat 111, so as to reduce the air guiding distance between the fan blade 112 and the static vane 132 as much as possible under the premise of ensuring the visual air guiding effect of the front air guiding portion 1113 and the rear air guiding portion 1111.

[0055] It can be understood that the static blade 132 can be arranged to extend axially to extend from the pressurizing seat 131 to the inside of the booster 12 and to extend to the front air guide part 1113 and the inner surface of the booster 12 to further reduce the distance between the static blade 132 on the fan assembly 11 and the fan blade 112 on the pressurizing seat 131, so that the air flow sent by the fan blade 112 can be more efficiently transferred to the pressurizing part 13. The static blade 132 extends through the gap C (as shown in Figure 2 Fig. 13) between the pressurizing seat 131 and the rotating seat 111, so that the fan blade 112 will directly transfer the air flow to the static blade 132 on the rotating seat 111, thereby reducing the loss of the air flow sent by the fan blade 112 at the gap C between the pressurizing seat 131 and the rotating seat 111, thereby increasing the amount of air sent.

[0056] As an optional embodiment, the radial radius of the rotating seat 111 gradually increases from the rear air guide part 1111, the fan blade connecting part 1112 and the front air guide part 1113, and the radial radius of the front air guide part 1113 is increased at a smaller rate than the radial radius of the rear air guide part 1111 and the fan blade connecting part 1112, so that the slope of the front air guide part 1113 is more gentle, which is beneficial to maintaining the wind speed of the air flow guided through the surface of the fan blade connecting part 1112.

[0057] As another optional embodiment, the radial radius of the front air guide part 1113 can also be increased at a rate that can be ignored compared to the radial radius of the rear air guide part 1111 and the fan blade connecting part 1112, that is, the radial radius of the front air guide part 1113 remains constant, which can be the same as the maximum radius range or maximum value of the fan blade connecting part 1112, and the surface of the front air guide part 1113 can be parallel to the axis of the rotating seat 111, so that the air passing through the surface of the front air guide part 1113 can be easily guided as straight flow parallel to the axis of the rotating seat 111.

[0058] Please refer to Figure 2 and Figure 5 Further, the booster 12 comprises a first cover 121, a second cover 122 and a third cover 123 connected axially in sequence, 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.

[0059] It can be understood that the fan blade assembly 1 comprises a rear cover 17, the rear cover 17 connects the casing 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 fan assembly 11 and the pressurizing seat 131. And the first cover 121 corresponds to the air outlet end 152 of the connecting casing 15, the third cover 123 corresponds to the air inlet end 151 of the connecting casing 15, and the two ends of the second cover 122 are connected with 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 casing 15. After a plurality of stationary vanes 132 are arranged at intervals outside the pressurizing seat 131 and connected with the first cover 121, a plurality of air outlet openings are formed between any two adjacent stationary vanes 132 and the first cover 121 and the pressurizing seat 131, for the wind flow after being pressurized and accelerated by the supercharger 12 and the pressurizing part 13 to enter the outside world. The first cover 121 is connected at the air outlet end 152 of the casing 15, which not only connects the casing 15 but also connects the pressurizing part 13, so that the wind flow can pass through more smoothly to enter the outside world. That is, the arrangement of the first cover 121 can realize the connection with other parts of the portable fan 3, and at the same time can fix the stationary vanes 132 on the pressurizing seat 131, prevent the stationary vanes 132 from shaking, and strengthen the structural strength of the whole pressurizing part 13, so as to reduce vibration and make the whole fan blade assembly 1 run more stably and smoothly.

[0060] Optionally, the connection between the first cover 121, the second cover 122 and the third cover 123 can be fixed connection or detachable connection, and the present embodiment does not limit this, as long as the connection of the three can form the supercharger 12.

[0061] Optionally, when the first cover 121, the second cover 122 and the third cover 123 are detachably connected, the rear cover 17 is fixedly connected with the third cover 123, and the pressurizing part 13 is fixedly connected with the first cover 121. The two ends of the second cover 122 are detachably connected with the first cover 121 and the third cover 123 respectively, so as to facilitate the assembly and disassembly of the fan blade assembly 1.

[0062] Please refer to Figure 3 and Figure 5 , further, the stationary vane 132 comprises a connecting part 1321 and an extending part 1322, the connecting part 1321 is located between the pressurizing seat 131 and the first cover 121 and connects the pressurizing seat 131 and the first cover 121 respectively; the extending part 1322 comprises a part located between the pressurizing seat 131 and the second cover 122, and a part located between the front air guide part 1113 and the second cover 122, the extending part 1322 extends axially from the connecting part 1321 to the fan blade 112, and extends axially to between the front air guide part 1113 and the inner surface of the supercharger 12.

[0063] It can be understood that the vane 132 includes a connecting portion 1321 connected to the pressurizing seat 131 and the first cover 121 respectively, and an extension portion 1322 connected to the pressurizing seat 131 and the connecting portion 1321 respectively, and the extension portion 1322 extends axially out of the pressurizing seat 131 at one end away from the connecting portion 1321. The extension portion 1322 not only protrudes relative to the first cover 121 and the pressurizing seat 131, but also extends into the inner surface between the front air guide portion 1113 and the supercharger 12, so as to pass through the gap C between the pressurizing seat 131 and the front air guide portion 1113, to complete the air flow transmission between the fan blades 112, and avoid the influence of the first cover 121 on the air flow transmission. The connecting portion 1321 and the extension portion 1322 of the vane 132 are in an integrated structure, and the entire pressurizing member 13 can be integrally formed, so as to improve the overall strength of the pressurizing member 13. The connecting portion 1321 and the extension portion 1322 of the vane 132 in the integrated structure can respectively realize the connecting function and the air guiding function, and the integrated structure formed by the connecting portion 1321 and the extension portion 1322 is more conducive to the natural transition of the extended air flow to the connecting portion 1321, so as to enter the outside, and further reduce the noise.

[0064] Please refer to Figure 3 , further, the inner surfaces of the first cover 121, the second cover 122 and the third cover 123 smoothly transition to form the first air flow passage surface 16, and the extension portion 1322 extends into the first air flow passage surface 16 between the front air guide portion 1113 and the first air flow passage surface 16.

[0065] It can be understood that the inner surfaces of the connecting portions of the first cover 121 and the third cover 123 with the second cover 122 can be kept flush, so that the inner surface of the part of the first cover 121 extending into the supercharger 12 and the inner surface of the supercharger 12 smoothly transition to form the first air flow passage surface 16, so that the air flow passes through the first air flow passage surface 16 more smoothly, and avoids the air flow sent by the fan blades 112 being lost at the connecting position of the first cover 121 and the supercharger 12.

[0066] Please refer to Figure 2 and Figure 6 , further, the first air flow passage surface 16 is radially convex to form an arc surface, 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 radial diameter D1 (as shown in Figure 6 D1) of the air inlet 1231 of the supercharger 12 is 44.9-48.9mm, and the radial diameter D2 (as shown in Figure 6 D2) of the air outlet 1211 of the supercharger is 53.4-57.4mm.

[0067] It can be understood that the first air flow passage surface 16 is radially convex to form an arc surface, and the arc surface is arranged to guide the air flow, and the air flow can flow more smoothly when passing through the arc surface, so that the fan blade 112 sends out the air flow more strongly and stably; in addition, the noise can be reduced.

[0068] It should be noted that the convex position of the arc surface corresponds to the gap between the fan blade 112 and the static blade 132, so the volume at this position is slightly increased, so that the air flow sent by the fan blade 112 can be temporarily buffered at this position, and after buffering, it enters the booster 12 and the pressure-increasing part 13 to continue to be pressurized and sent out, which realizes effective guidance of the air flow, reduces the formation of vortex, improves the stability of the air flow flowing between the inner surfaces of the pressure-increasing part 13 and the booster 12, and further reduces the loss of the air flow at the gap between the fan blade 112 and the static blade 132.

[0069] It can be understood that the air inlet 1231 and the air outlet 1211 of the booster 12 are arranged corresponding to the air inlet end and the air outlet end 152 of the shell 15. The radial diameter of the booster 12 gradually increases from the air inlet 1231 to the air outlet 1211, so that the arc surface of the first air flow passage surface 16 transitions more naturally and gently, realizes gradual pressurization of the air flow sent by the fan blade 112, makes the pressurization process of the air flow more stable, ensures the stability of the air flow in the pressurization process, thereby reducing the fluctuation and vortex phenomenon of the air flow, and improving the stability of the overall air flow; and by setting the radial diameter D1 of the air inlet 1231 of the booster 12 to 44.9-48.9mm and the radial diameter D2 of the air outlet 1211 to 53.4-57.4mm, the radial diameter range of the booster 12 is limited, thereby limiting the upper and lower limit ranges of the booster 12, avoiding that the pressurization range is too large or too small to affect the stability of the air flow and produce more noise.

[0070] Please refer to Figure 3 and Figure 7 , further, the gap width L1 (as shown in Figure 7 L1) between the static blade top end 1323 of the extension part 1322 and the inner surface of the booster 12 is less than the gap width L2 (as shown in Figure 7 L2) between the fan blade top end 1121 of the fan blade 112 and the inner surface of the booster 12.

[0071] Specifically, the stationary vane 132 comprises a stationary vane top end 1323 and a stationary vane root end 1324, as well as a stationary vane leading end 1325 and a stationary vane trailing end 1326. The stationary vane root end 1324 is the end connected to the pressurizing seat 131; the stationary vane top end 1323 is the end away from the stationary vane root end 1324, i.e. the end close to the inner surface of the booster 12; the stationary vane leading end 1325 is the end away from the fan assembly 11, and corresponds to one end of the air outlet end 152 of the shell 15; and the stationary vane trailing end 1326 is the end close to the fan assembly 11. The fan blade 112 comprises a fan blade top end 1121 and a fan blade root end 1122, as well as a fan blade leading end 1123 and a fan blade trailing end 1124. The fan blade root end 1122 is the end connected to the rotating seat 111; the fan blade top end 1121 is the end away from the fan blade root end 1122, i.e. the end close to the inner surface of the booster 12; the fan blade leading end 1123 is the end close to the pressurizing member 13; and the fan blade trailing end 1124 is the end away from the pressurizing member 13, and corresponds to one end of the air outlet end 152 of the shell 15 and one end of the air inlet 1231 of the booster 12. The gap width L1 between the stationary vane top end 1323 of the extension 1322 and the inner surface of the booster 12 is smaller than the gap width L2 between the fan blade top end 1121 of the fan blade 112 and the inner surface of the booster 12, so that the air flow transmitted by the fan blade 112 is reduced in speed when passing through the gap between the fan blade 112 and the booster 12, thereby ensuring that most of the air flow transmitted by the fan blade 112 is transmitted by the stationary vane 132 at a high air speed.

[0072] Further, the gap width between the stationary vane top end 1323 of the extension 1322 and the inner surface of the booster 12 is the same from the end of the extension 1322 close to the fan blade 112 to the end of the extension 1322 away from the fan blade 112; and the gap width between the stationary vane top end 1323 of the extension 1322 and the inner surface of the booster 12 is 0.

[0073] It can be understood that the gap width L1 between the stationary vane top end 1323 of the extension 1322 and the inner surface of the booster 12 is the same at different positions, avoiding the air flow being reduced in speed when passing through gaps of different widths.

[0074] Optionally, when the stationary vane top end 1323 of the extension 1322 is too close to the inner surface of the booster 12, the gap width L1 between the stationary vane top end 1323 of the extension 1322 and the inner surface of the booster 12 can be negligible. Or the stationary vane top end 1323 of the extension 1322 directly abuts and contacts the inner surface of the booster 12. In these two cases, the value of the gap width L1 is 0. Thus, through the abutment of the extension 1322, the stability of the connection between the booster 12 and the pressurizing member 13 is improved, thereby improving the stability of the air guide between the two.

[0075] Please refer to Figures 4-6Further, the radial radius of the partial pressurizing seat 131 gradually increases from the end close to the rotating seat 111 to the end far from the rotating seat 111, and the radial radius of the end of the pressurizing seat 131 close to the rotating seat 111 is the same as the radial radius of the end of the front air guiding part 1113 close to the pressurizing seat 131.

[0076] It can be understood that the radial radius of the rotating seat 111, the supercharger 12 and the partial pressurizing seat 131 gradually increases along the air flow direction f, and the radial radius of the pressurizing seat 131 gradually increases from the end close to the rotating seat 111 to the end far from the rotating seat 111 at the same value as the radial radius of the end of the front air guiding part 1113 close to the pressurizing seat 131, so that the air flow guided by the front air guiding part 1113 is not suddenly blocked or directionally changed due to the gap C between the front air guiding part 1113 and the pressurizing seat 131, and the uninterrupted continuous pressurization of the air flow on the rotating seat 111 to the pressurizing seat 131 is realized, so that stable air flow output is realized, the air flow quality is uniform, and air flow fluctuation caused by non-continuous pressurization due to the gap C is reduced. In addition, due to the stable air flow, the wind noise is low, and better noise control effect can be achieved.

[0077] Please refer to Figure 8 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.

[0078] 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 power the motor 14 and drive the fan assembly 11 to rotate and blow air flow. The power supply part 2 can be a handheld component for users to hold and use, or stand on a flat surface, and the fan blade assembly 1 is used to blow air to the user. In this embodiment, the portable fan 3 is a handheld fan. Of course, in other embodiments, the portable fan 3 can be a small fan with only the above-mentioned fan blade assembly 1, a desktop fan, a clip fan, a versatile fan, etc. This embodiment does not limit the comparison, as long as the power supply part 2 can power the motor 14 inside the fan blade assembly 1. Since the portable fan 3 includes any one of the fan blade assemblies 1 described in the first embodiment, it has the same technical effects as the fan blade assembly 1 in the first embodiment, and this embodiment does not limit the comparison.

[0079] Please refer to Figure 3Specifically, the rotating seat 111 is provided with a mounting groove 1114 on the side close to the pressurizing member 13, the pressurizing 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 and form a mounting space, and the motor 14 is accommodated in the mounting space. The fan assembly 11 is driven by the motor 14 to rotate as a whole, so as to drive the fan blades 112 to rotate.

[0080] It can be understood that the fan blade assembly 1 further comprises a display assembly 18 arranged on the side of the pressurizing 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 status.

[0081] Compared with the prior art, the fan blade assembly and the portable fan have the following advantages:

[0082] 1. The static blade of the pressurizing seat extends radially to connect the pressurizing seat and the supercharger, and extends axially beyond the pressurizing seat. The static blade extends axially beyond the pressurizing seat in the direction close to the fan assembly, so as to reduce the distance between the static blade on the fan assembly and the fan blade on the pressurizing seat, and to better transition the air flow sent by the fan blade to the pressurizing member, reduce the loss of the air flow sent by the fan assembly in the shell, and thus improve the air volume.

[0083] 2. The static blade extends axially from the pressurizing seat to the inside of the supercharger, and extends to between the front air guiding part and the inner surface of the supercharger, so as to further reduce the distance between the fan blade on the fan assembly and the static blade on the pressurizing seat, and thus make the air flow sent by the fan blade be more efficiently transitioned to the pressurizing member. The static blade extends through the gap between the pressurizing seat and the rotating seat, so that the air flow sent by the fan blade is directly transitioned to the static blade on the rotating seat, thereby reducing the loss of the air flow sent by the fan blade at the gap between the pressurizing seat and the rotating seat, and thus increasing the air volume.

[0084] 3. The supercharger formed by the first cover, the second cover and the third cover in sequence can realize the supercharging and speed-up of the air flow in the supercharger by the cooperation of the supercharger, the pressurizing member and the rotating seat. The static blade connected to the first cover can fix the static blade on the pressurizing seat, prevent the static blade from shaking, strengthen the structural strength of the whole pressurizing member, reduce the vibration, and make the whole fan blade assembly run more stably and smoothly.

[0085] 4. By setting the connecting part and the extension part of the stationary blade, the extension part protrudes relative to the first cover and the pressurizing seat, and the protruding part extends into the space between the front air guide and the inner surface of the pressurizer, thereby crossing the gap between the pressurizing seat and the front air guide to complete the efficient airflow between the fan blades.

[0086] 5. By setting the inner surfaces of the first cover, second cover and third cover to form a smooth transition to form the first airflow channel surface, the airflow can pass through the first airflow channel surface more smoothly, avoiding the loss of airflow delivered by the fan blades at the connection point of the three.

[0087] 6. By setting the radial diameter of the booster to gradually increase from the air inlet to the air outlet, the arc transition of the first airflow channel surface becomes more natural and smooth, achieving gradual pressurization of the airflow delivered by the fan blades. This makes the pressurization process more stable, ensuring the stability of the airflow during pressurization, thereby reducing airflow fluctuations and eddies, and improving the overall airflow stability. Furthermore, by setting the radial diameter of the booster's air inlet to 44.9-48.9mm and the radial diameter of the air outlet to 53.4-57.4mm, the range of the booster's radial diameter is limited, thus restricting the upper and lower limits of the booster's pressurization. This prevents the pressurization range from being too large, which could affect the stability of the airflow and generate greater noise.

[0088] 7. By setting the gap width between the tip of the stationary blade of the extension section and the inner surface of the intensifier to be smaller than the gap width between the tip of the fan blade and the inner surface of the intensifier, the airflow transmitted by the fan blade can be reduced from passing through the gap between the fan blade and the intensifier, thereby reducing the wind speed. This ensures that most of the airflow transmitted by the fan blade can be transmitted through the stationary blade at a high wind speed.

[0089] 8. By setting the gap width between the tip of the stator blade of the extension and the inner surface of the booster to be the same and making the gap width 0, the tip of the stator blade of the extension directly abuts the inner surface of the second cover, thereby improving the stability of the connection between the booster and the pressurizing component, and thus improving the stability of airflow guidance and boosting speed between the two.

[0090] 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.

[0091] The fan blade assembly and the portable fan disclosed in the above embodiments of the utility model are described in detail, the principle and implementation mode of the utility model are described by applying specific examples in this paper, the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the art, according to the idea of the utility model, the specific implementation mode and application range will have changes, and according to the above, the content of the specification should not be understood as the limitation of the utility model, and any modification, equivalent replacement and improvement made within the principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A leaf assembly, characterized by: The application relates to a fan assembly. The fan assembly comprises: a shell, which is internally through and comprises an air inlet end and an air outlet end; a fan assembly, which comprises a rotating seat and a plurality of fan blades; a pressurizing part, which is arranged axially in sequence with the fan assembly and corresponds to the air inlet end and the air outlet end respectively, and comprises a pressurizing seat and a plurality of stationary vanes; a booster, which is arranged in the shell and internally through and surrounds the radial periphery of the fan assembly and the pressurizing part; 2. The leaf assembly of claim 1, wherein: wherein the stationary vanes extend radially to connect the pressurizing seat and the booster, and extend axially beyond the pressurizing seat.

3. The leaf assembly of claim 2, wherein: The rotating seat comprises a rear air guide part, a fan blade connecting part and a front air guide part arranged axially in sequence, and the radial radius of the rotating seat gradually increases from the rear air guide part to the fan blade connecting part; the stationary vanes extend axially to the space between the front air guide part and the inner surface of the booster.

4. The leaf assembly of claim 3, wherein: The booster comprises a first cover, a second cover and a third cover arranged axially in sequence, the first cover surrounds the pressurizing seat, and a plurality of stationary vanes are arranged in the space outside the pressurizing seat and connected to the first cover.

5. The leaf assembly of claim 4, wherein: The stationary vanes comprise a connecting part and an extending part, the connecting part is arranged between the pressurizing seat and the first cover and connected to the pressurizing seat and the first cover respectively; the extending part comprises a part arranged between the pressurizing seat and the second cover and a part arranged between the front air guide part and the second cover, the extending part extends axially from the connecting part to the space between the front air guide part and the inner surface of the booster.

6. The leaf assembly of claim 5, wherein: The inner surfaces of the first cover, the second cover and the third cover are smoothly connected to form a first air flow channel surface, and the extending part extends into the space between the front air guide part and the first air flow channel surface.

7. The leaf assembly of claim 4, wherein: The first air flow channel surface is radially convex to form an arc surface, the booster comprises an air inlet and an air outlet, and the radial diameter of the booster gradually increases from the air inlet to the air outlet; the radial diameter of the air inlet of the booster is 44.9-48.9 mm, and the radial diameter of the air outlet of the booster is 53.4-57.4 mm.

8. The leaf assembly of claim 7, wherein: The gap width between the top end of the stationary vane of the extending part and the inner surface of the booster is smaller than the gap width between the top end of the fan blade and the inner surface of the booster.

9. The leaf assembly of claim 2 wherein: The gap width between the top end of the stationary vane of the extending part and the inner surface of the booster is the same from the end of the extending part close to the fan blade to the end of the extending part away from the fan blade; the gap width between the top end of the stationary vane of the extending part and the inner surface of the booster is 0.

10. A portable fan characterized by: The radial radius of part of the pressurizing seat gradually increases from the end close to the rotating seat to the end away from the rotating seat; the radial radius of the end of the pressurizing seat close to the rotating seat is the same as the radial radius of the end of the front air guide part close to the pressurizing seat. The fan assembly comprises the fan blade assembly, a motor and a power supply part, the motor is arranged in the fan blade assembly, the power supply part is arranged outside the fan blade assembly, the power supply part and the motor are electrically connected to drive the fan assembly to rotate.

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