Portable fan

Abstract

The utility model discloses a portable fan. The portable fan comprises a fan shell; the fan assembly is arranged in the fan shell, and a fan air inlet and a fan air outlet which are communicated with the fan assembly are formed in the fan shell; the fan assembly comprises a fan shell and a fan air inlet, the fan air inlet comprises a plurality of air inlet openings, the multiple air inlet openings are distributed in the multiple surfaces of the fan shell, a flow mixing space is formed in the fan shell, and the flow mixing space communicates with the multiple air inlet openings and the fan assembly. The negative pressure areas are distributed on the different surfaces of the fan shell, the pressure dividing effect is achieved, the power of external airflow flowing into the fan shell is reduced, the interaction force of the external airflow and the fan shell is synchronously reduced, and then the wind noise generated when the airflow flows in is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fans, in particular to a portable fan. BACKGROUND

[0002] In hot summer, fans become essential for people to eliminate the heat. With the convenience of use, more and more people prefer lighter and more portable fans.

[0003] In the prior art, a portable fan generally comprises a fan shell and a fan assembly arranged in the fan shell. The fan shell is usually provided with a fan air inlet and a fan air outlet arranged oppositely. When the fan assembly rotates, the airflow is pushed into the fan air inlet and blown out of the fan air outlet.

[0004] The inventor of the present application found in the research that when the rotating speed of the fan assembly is high, the air intake of the fan air inlet increases. After the air intake increases, the force between the airflow flowing into the fan shell and the fan shell increases, resulting in an increase in the wind noise of the portable fan. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide a portable fan with multiple air inlet openings and low fan noise.

[0006] The present application provides a portable fan, comprising:

[0007] a fan shell;

[0008] a fan assembly arranged in the fan shell, and the fan shell is provided with a fan air inlet and a fan air outlet communicating with the fan assembly;

[0009] The fan air inlet comprises multiple air inlet openings, the multiple air inlet openings are distributed on multiple surfaces of the fan shell, a mixed flow space is arranged in the fan shell, and the mixed flow space is in communication with the multiple air inlet openings and the fan assembly.

[0010] Optionally, a flow mixer is arranged in the mixed flow space, the flow mixer is connected with the fan shell, and the flow mixer is in communication with the fan assembly and the multiple air inlet openings; and / or,

[0011] The fan assembly is embedded and fixed in the fan shell; and / or,

[0012] The fan assembly is a three-phase motor; and / or,

[0013] The rated working voltage of the fan assembly is 6-8.4V or 9-12.6V; and / or,

[0014] The rated working current of the fan assembly is 0.1-2.9A or 0.08-2.7A; and / or,

[0015] The rated power of the fan assembly is 0.6-25W or 0.7-33W; and / or,

[0016] The rotation speed of the fan assembly is 14000-48000 revolutions per minute; and / or,

[0017] A shockproof silica gel sleeve is clamped between the fan assembly and the fan housing.

[0018] Optionally, one end of the flow mixer is connected to the fan housing, and the other end of the flow mixer abuts against the fan assembly; and / or,

[0019] The flow mixer is annular, and the side wall of the flow mixer communicates with the at least one air inlet opening; and / or,

[0020] A plurality of air inlet windows are formed in the flow mixer, and each air inlet window corresponds to an air inlet opening.

[0021] Optionally, the opening area of each air inlet window is smaller than that of the corresponding air inlet opening; and / or,

[0022] The flow mixer and the fan assembly are coaxially stacked, and the inner diameter of the end of the flow mixer abutting against the fan assembly is the same as the inner diameter of the fan assembly.

[0023] Optionally, the portable fan further comprises a battery assembly, and the battery assembly is arranged on the two sides of the fan housing separately from the fan assembly.

[0024] Optionally, the flow mixer further comprises a partition plate arranged on the side facing the battery assembly.

[0025] Optionally, the end of the flow mixer connected to the fan housing comprises a first connecting end and a second connecting end; the first connecting end abuts against the fan housing, and the second connecting end is snap-connected to the fan housing; and / or,

[0026] The partition plate comprises a first partition side wall and a second partition side wall arranged oppositely, and the first partition side wall and the second partition side wall are connected to the inner surface of the fan housing, respectively; and / or,

[0027] The fan housing comprises a first cavity and a second cavity, the fan assembly is arranged in the first cavity, the battery assembly is arranged in the second cavity, and the partition plate is arranged between the first cavity and the second cavity.

[0028] Optionally, a support frame is arranged at a position of the fan shell where the first connecting end is located, and the first connecting end is in abutment with the support frame; and / or,

[0029] The second connecting end extends in a direction away from the fan assembly to form a connecting claw, and the fan shell is provided with a clamping edge that cooperates with the connecting claw.

[0030] Optionally, a limiting groove is recessed at a position where the first connecting end is in abutment with the support frame, and the limiting groove is in abutment with the support frame.

[0031] Optionally, a plurality of limiting protrusions are protruded from the fan shell in a direction facing the flow mixer, and the plurality of limiting protrusions are in abutment with the inner wall of the flow mixer.

[0032] The fan shell of the portable fan is provided with a plurality of air inlet openings, and the plurality of air inlet openings are arranged on different surfaces of the fan shell. The plurality of air inlet openings can increase the air inlet area of the fan, and negative pressure is generated at different air inlet openings when the fan assembly is working, guiding external airflow to flow into the fan shell. Since the negative pressure areas are distributed on different surfaces of the fan shell, the effect of pressure distribution is achieved, the external airflow flowing into the fan shell is reduced in power, the force acting on the fan shell is also reduced, and the wind noise when the airflow flows in is reduced. In order to further reduce the wind noise of the portable fan, a flow mixing space is arranged at the positions corresponding to the plurality of air inlet openings. The plurality of air inlet openings are arranged on different surfaces of the fan shell, so that the airflow flowing in from different air inlet openings has different flow directions. When the airflow with different flow directions directly enters the fan assembly, it will have a negative effect on the rotation of the fan assembly, reduce the working efficiency of the fan assembly, and even generate vortex in the fan assembly, causing greater wind noise. The flow mixing space is arranged to mix the airflow with different directions in the flow mixing space first, so as to offset the initial direction kinetic energy of the airflow flowing in from different air inlet openings. After the initial direction kinetic energy of the airflow in the flow mixing space is reduced or offset, the consistency of the airflow after mixing is enhanced, the negative effect on the fan assembly is greatly reduced, the working efficiency of the fan assembly is improved, and the wind noise of the fan assembly is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings of which:

[0034] Figure 1 A first perspective view of a portable fan according to an embodiment of the present application;

[0035] Figure 2 A second perspective view of a portable fan according to an embodiment of the present application;

[0036] Figure 3 A cross-sectional view of a portable fan according to an embodiment of the present application;

[0037] Figure 4 A schematic view of a second housing structure according to an embodiment of the present application;

[0038] Figure 5 A cross-sectional view of a second housing according to an embodiment of the present application;

[0039] Figure 6 A schematic view of a first perspective view of a flow mixer according to an embodiment of the present application;

[0040] Figure 7 A schematic view of a second perspective view of a flow mixer according to an embodiment of the present application.

[0041] BRIEF DESCRIPTION OF DRAWINGS: 1, fan housing; 11, first housing; 12, second housing; 121, support frame; 122, clamping edge; 123, limiting protrusion; 13, third housing; 14, fan air inlet; 141, air inlet opening; 141a, first air inlet; 141b, second air inlet; 141c, third air inlet; 15, fan air outlet; 2, fan assembly; 21, shockproof silica gel sleeve; 3, battery assembly; 4, flow mixer; 41, air inlet window; 411, first window; 412, second window; 413, third window; 42, partition plate; 43, connecting clamping jaw; 44, first connecting end; 45, second connecting end; 46, limiting groove. DETAILED DESCRIPTION

[0042] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", and similar expressions used in the present specification are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used in the present specification are the same as those commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more related listed items.

[0044] Please refer toFigure 1 and Figure 2 , Figure 1 It is the first view structure schematic diagram of the portable fan of the embodiment; Figure 2 It is the second view structure schematic diagram of the portable fan of the embodiment.

[0045] As Figure 1 and Figure 2 shown, a portable fan, comprising: a fan shell 1; a fan assembly 2, the fan assembly 2 is arranged in the fan shell 1, and the fan shell 1 is provided with a fan inlet 14 and a fan outlet 15 communicating with the fan assembly 2; the fan inlet 14 comprises a plurality of air inlet openings 141, the plurality of air inlet openings 141 are distributed on a plurality of surfaces of the fan shell 1, a mixed flow space is provided in the fan shell 1, and the mixed flow space is communicated with the plurality of air inlet openings 141 and the fan assembly 2 respectively.

[0046] The fan shell 1 in the embodiment comprises a first shell 11, a second shell 12 and a third shell 13, wherein the first shell 11 is sleeved on the second shell 12, and the third shell 13 is inserted into the second shell 12. The fan assembly 2 is connected with the third shell 13, and each air inlet opening 141 penetrates through the first shell 11 and the second shell 12. However, the structure of the fan shell 1 is not limited thereto, and in some embodiments, the fan shell 1 can be formed by two half shells spliced front and back or up and down according to different specific application scenarios.

[0047] In the embodiment, the fan assembly 3 can be (but is not limited to) a single-phase motor, a two-phase motor or a three-phase motor.

[0048] The fan inlet 14 and the fan outlet 15 are both provided on the surface of the fan shell 1, wherein the number of the fan outlet 15 is 1. In some embodiments, the fan inlet 14 is divided into a plurality of fan outlet holes, and the number of the fan outlet holes can be (but is not limited to) 2, 3, 4, 5 or more.

[0049] The number of the fan inlet 14 is 3. However, the number of the fan inlet 14 is not limited thereto, and in some embodiments, the number of the fan inlet 14 can be (but is not limited to) 2, 4, 5 or more according to different specific application scenarios.

[0050] In some embodiments, the air inlet opening 141 comprises a first air inlet opening 141a, a second air inlet opening 141b and a third air inlet opening 141c. The first air inlet opening 141a is provided on the bottom surface of the fan shell 1, and the second air inlet opening 141b and the third air inlet opening 141c are provided on the side wall of the fan shell 1.

[0051] A mixing space is formed in the fan housing 1 and is located between the fan assembly 2 and the fan housing 1. The mixing space is used to communicate the plurality of air inlet openings 141 respectively, so that the air flows entering from different air inlet openings 141 can be mixed in the mixing space, eliminating the transverse movement kinetic energy of the air flows entering from different air inlet openings 141, and improving the consistency of the air flow.

[0052] The mixing space in the embodiment can be enclosed by the inner surface of the fan housing 1, or can be enclosed by the inner surface of the fan housing 1 and the partition plate, or can be enclosed by a separate structural member arranged in the fan housing 1. The mixing space is a space for buffering and canceling air flows, and its configuration form is diverse and is not limited to the form illustrated in the specification.

[0053] In the above embodiment, the fan housing 1 of the portable fan is provided with a plurality of air inlet openings 141, and the plurality of air inlet openings 141 are arranged on different surfaces of the fan housing 1. The plurality of air inlet openings 141 can increase the air inlet area of the fan air inlet 14, and the fan assembly 2 will generate negative pressure at different air inlet openings 141 when working, guiding the external air flow to flow into the fan housing 1. Since the negative pressure region is distributed on different surfaces of the fan housing 1, it has the effect of pressure distribution, so that the external air flow flowing into the fan housing 1 has reduced power, and the force acting on the fan housing 1 is also reduced, thereby reducing the wind noise when the air flow flows in. At the same time, in order to further reduce the wind noise of the portable fan, the fan housing 1 is provided with a mixing space at the position corresponding to the plurality of air inlet openings 141. The plurality of air inlet openings 141 are located on different surfaces of the fan housing 1, so that the air flows flowing from different air inlet openings 141 have different flow directions. When the air flows with different flow directions directly enter the fan assembly 2, they will have a negative impact on the rotation of the fan assembly 2, reducing the working efficiency of the fan assembly 2, and even generating vortex in the fan assembly 2, causing greater wind noise. The mixing space is arranged to mix the air flows with different directions in the mixing space first, so as to cancel the initial direction kinetic energy of the air flows flowing from different air inlet openings 141. After the initial direction kinetic energy of the air flows in the mixing space is reduced or canceled, the consistency of the mixed air flows is improved, the negative effect on the fan assembly 2 is greatly reduced, the working efficiency of the fan assembly 2 is improved, and the wind noise of the fan assembly 2 is further reduced.

[0054] In some embodiments, the fan assembly 2 is embedded and fixed in the fan housing 1. The embedded and fixed fan assembly facilitates assembly and replacement of the fan assembly.

[0055] In some embodiments, the fan assembly 2 is externally provided with a shockproof silica gel sleeve 21. The shockproof silica gel sleeve 21 can effectively buffer the mechanical vibration of the fan assembly 2, increase the friction coefficient of the contact position between the fan assembly 2 and the fan housing 1, and improve the firmness and stability of the fan assembly 2.

[0056] In some embodiments, the fan assembly is a three-phase motor, which has a higher rotating speed, thereby increasing the air outlet speed and air outlet volume of the fan assembly 2. However, the fan assembly is not limited thereto, and in some embodiments, the fan assembly can be a single-phase motor or a two-phase motor, according to different application scenarios.

[0057] In some embodiments, the fan assembly is powered by a battery, and the power supply battery of the fan assembly can be a two-battery, three-battery, four-battery or more battery in series.

[0058] In some embodiments, the rated working voltage of the fan assembly is 6-8.4V or 9-12.6V. When the rated working voltage of the fan assembly is 6-8.4V, the fan assembly is powered by two batteries in series, and under this rated working voltage range, the corresponding rated working current of the fan assembly is 0.1-2.9A, the corresponding rated power of the fan assembly is 0.6-25W, and the rotating speed of the fan assembly is 14000-46000 revolutions / minute.

[0059] When the rated working voltage of the fan assembly is 9-12.6V, the fan assembly is powered by three batteries in series, and under this rated working voltage range, the corresponding rated working current of the fan assembly is 0.08-2.7A, the corresponding rated power of the fan assembly is 0.7-33W, and the rotating speed of the fan assembly is 14000-48000 revolutions / minute.

[0060] When the fan assembly is a three-phase motor and is powered by a battery, the high-speed rotating fan assembly will generate a larger frequency vibration. Long-term vibration will cause the fan assembly to displace, and the fan assembly is supported by the flow mixer 4, which plays a role in fixing and limiting the fan assembly 2, making the working environment of the fan assembly 2 more stable.

[0061] Please refer to Figure 5 and Figure 6 , Figure 5 is a first perspective view of the flow mixer of the present embodiment; Figure 6 is a second perspective view of the flow mixer of the present embodiment.

[0062] As shown in Figure 5 and Figure 6 , in some embodiments, a flow mixer 4 is arranged in the flow mixing space, the flow mixer 4 is connected with the fan housing 1, and the flow mixer 4 respectively communicates with the fan assembly 2 and the plurality of air inlet openings 141.

[0063] The mixed flow device 4 is arranged in the mixed flow space and is connected to the fan assembly 2 and the plurality of air inlet openings 141. The airflow entering the mixed flow device 4 from the plurality of air inlet openings 141 is subjected to transverse kinetic energy offsetting and mixed flow. The mixed flow device 4 is independently arranged and can be conveniently disassembled and assembled. Meanwhile, the mixed flow device 4 can compress the mixed flow space and reduce the space for airflow flow in the mixed flow space, so that the airflow after mixed flow has better flow consistency.

[0064] In some embodiments, one end of the mixed flow device 4 is connected to the fan housing 1, and the other end of the mixed flow device 4 is in abutment with the fan assembly 2. The mixed flow device 4 is arranged between the fan housing 1 and the fan assembly 2 and can also support the fan assembly 2 to prevent the fan assembly 2 from falling off the fan housing 1.

[0065] In some embodiments, the fan assembly 2 is an independent modular accessory and is fixed in the fan housing 1 by interference fit, clamping or screw connection. The fan assembly 2 will vibrate when working, and displacement problems may occur during long-term use. The mixed flow device 4 supports and limits the fan assembly 2, so that the connection of the fan assembly 2 is more stable.

[0066] In some embodiments, the mixed flow device 4 is annular, and the side wall of the mixed flow device 4 is connected to at least one air inlet opening 141. One end of the mixed flow device 4 is in abutment with the fan assembly 2, and the other end of the mixed flow device 4 is connected to the fan housing 1 and is connected to the air inlet opening 141 on the bottom surface of the fan housing 1. In order to increase the air inlet efficiency of the portable fan, the air inlet opening 141 is arranged on the side wall of the fan housing 1, and the side wall of the mixed flow device 4 is connected to the air inlet opening 141 on the side wall of the fan housing 1, so as to guide the airflow at the side wall of the fan housing 1 to flow into the mixed flow device 4.

[0067] In some embodiments, a plurality of air inlet windows 41 are arranged on the mixed flow device 4, and the plurality of air inlet windows 41 correspond to the plurality of air inlet openings 141. The plurality of air inlet openings 141 are arranged on the side wall of the fan housing 1, and the plurality of air inlet windows 41 are arranged on the side wall of the corresponding mixed flow device 4, and each air inlet window 41 corresponds to an air inlet opening 141.

[0068] In this embodiment, the number of air inlet openings 141 on the side wall of the fan housing 1 is two, but the number of air inlet openings 141 is not limited to this. In some embodiments, the number of air inlet openings 141 on the side wall of the fan housing 1 is (not limited to) 3, 4, 5 or more, according to different specific application scenarios. The number of air inlet windows 41 on the side wall of the mixer 4 is the same as or greater than the number of air inlet openings 141 on the side wall of the fan housing 1.

[0069] In some embodiments, the air inlet window 41 includes a first window 411, a second window 412 and a third window 413. The first window 411 is provided on one end of the mixer 4 facing the bottom surface of the fan housing 1, and the first window 411 corresponds to the first air inlet 141a. The second window 412 and the third window 413 are both provided on the side wall of the mixer 4, and the second window 412 and the third window 413 correspond to the second air inlet 141b and the third air inlet 141c, respectively.

[0070] In some embodiments, the mixer 4 and the fan assembly 2 are coaxially stacked.

[0071] In some embodiments, the opening area of each air inlet window 41 in the plurality of air inlet windows 41 is smaller than the opening area of the corresponding air inlet opening 141. The area of each air inlet window 41 is smaller than the area of the corresponding air inlet opening 141. The airflow is pressurized when passing through the air inlet opening 141 and entering the air inlet window 41. The pressurized airflow has high kinetic energy after entering the mixer 4, which shortens the time of the airflow entering the fan assembly 2 and improves the air inlet efficiency of the fan assembly 2. At the same time, the opening area and position of each air inlet opening 141 are different, and the area of the air inlet window 41 is smaller than the area of the air inlet opening 141, so that the air inlet window 41 can be placed at any position intersecting with the air inlet opening 141, thereby adjusting the mixing position of the inflowing airflow, and making the airflow in different directions mix better in the mixer 4.

[0072] In some embodiments, the mixer 4 and the fan assembly 2 are coaxially stacked, and the inner diameter of the end portion of the end of the mixer 4 and the fan assembly 2 abutting each other is the same as the inner diameter of the fan assembly 2. The mixer 4 and the fan assembly 2 are coaxially stacked, and the inner diameters at the abutting positions are also the same. This reduces the resistance of the airflow in the mixer 4 flowing to the fan assembly 2, and improves the air inlet efficiency of the fan assembly 2.

[0073] In some embodiments, the portable fan further comprises a battery assembly 3, which is arranged on the two sides of the fan shell 1 separately from the fan assembly 2. Both the battery assembly 3 and the fan assembly 2 can serve as the counterweight of the portable fan. Arranging the battery assembly 3 and the fan assembly 2 on the two sides of the fan shell 1 can stabilize the center of gravity of the portable fan and prevent the portable fan from deviating. When the user wears or holds the portable fan, the portable fan is less likely to deviate and has higher stability.

[0074] In some embodiments, the flow mixer 4 further comprises a partition plate 42 arranged on the side facing the battery assembly 3. Since the fan assembly and the battery assembly 3 are arranged in the two cavities in the fan shell 1 respectively, the airflow entering the fan shell 1 will flow into the cavity where the battery assembly 3 is arranged, and vortex or whistling noise will be generated due to the vibration of the slits or through holes in the cavity. Arranging the partition plate 42 between the two cavities can effectively prevent the airflow from flowing in and prevent vortex or whistling noise from being generated between the two cavities.

[0075] In some embodiments, the first cavity and the second cavity, the fan assembly 2 is arranged in the first cavity, the battery assembly 3 is arranged in the second cavity, and the partition plate 42 is arranged between the first cavity and the second cavity. Arranging the partition plate 42 between the first cavity and the second cavity can effectively prevent vortex or whistling noise from being generated between the first cavity and the second cavity.

[0076] In some embodiments, the end of the flow mixer 4 connected with the fan shell 1 comprises a first connecting end 44 and a second connecting end 45. The first connecting end 44 is in abutment with the fan shell 1, and the second connecting end 45 is snap-connected with the fan shell 1. The first connecting end 44 and the second connecting end 45 of the flow mixer 4 are in abutment and snap-connected with the fan shell 1 respectively. The abutment between the first connecting end 44 and the fan shell 1 can provide support force for the flow mixer 4, which is transmitted to the fan assembly and can stabilize the position of the fan assembly and prevent the fan assembly from moving towards the flow mixer 4. The snap-connection between the second connecting end 45 and the fan shell 1 can generate traction between the fan shell 1 and the flow mixer 4, which can prevent the flow mixer 4 from moving towards the fan assembly 2. The same end is in abutment and snap-connection, so the fan shell 1 can provide support force and traction for the flow mixer 4, which can not only support the fan assembly 2 but also limit the position of the flow mixer 4 from pressing the fan assembly 2 inward.

[0077] Please refer to Figure 4 and Figure 5 , Figure 4 the second shell structure of the present embodiment is shown in the figure; Figure 5 the second shell of the present embodiment is shown in the figure.

[0078] As shown in Figure 4 and Figure 5 shown, in some embodiments, the fan shell 1 is provided with a support frame 121 at the position of the first connecting end 44, and the first connecting end 44 abuts against the support frame 121. The provision of the support frame 121 greatly increases the tolerance of assembly errors between the first connecting end 44 and the fan shell 1. When the length of the mixed-flow device 4 is greater than the set length, the mixed-flow device 4 is compressed to reach the predetermined position by the height of the support frame 121, facilitating assembly.

[0079] In some embodiments, the second connecting end 45 extends in a direction away from the fan assembly 2 to form a connecting claw 43, and the fan shell 1 is provided with a clamping edge 122 that cooperates with the connecting claw 43.

[0080] Please refer to Figure 3 , Figure 3 is a cross-sectional view of the portable fan of the present embodiment.

[0081] As shown in Figure 3 , the inner surface or the bottom surface of the fan shell 1 is formed with a clamping edge 122 at the position corresponding to the second connecting end 45. However, the formation of the clamping edge 122 is not limited thereto, and in some embodiments, the fan shell 1 is composed of a first shell 11 and a second shell 12 that are nested together, and the bottom surfaces of the first shell 11 and the second shell 12 are provided with openings. The opening area of the first shell 11 is greater than that of the second shell 12, so that the first shell 11 and the second shell 12 are misaligned at the bottom surfaces, and the misaligned structure of the second shell 12 is the clamping edge 122.

[0082] In some embodiments, the position where the first connecting end 44 abuts against the support frame 121 is recessed to form a limiting groove 46, and the limiting groove 46 abuts against the support frame 121. The position where the first connecting end 44 abuts against the support frame 121 is recessed to form a limiting groove 46, which can function as a limiting structure to prevent the mixed-flow device 4 from rotating and shifting within the fan shell 1, thereby ensuring the stability of the placement and connection of the mixed-flow device 4.

[0083] In some embodiments, the fan shell 1 is provided with a plurality of limiting protrusions 123 protruding towards the mixed-flow device 4, and the plurality of limiting protrusions 123 abut against the inner wall of the mixed-flow device 4.

[0084] The number of limiting protrusions 123 in the present embodiment is 2. However, the number of limiting protrusions 123 is not limited thereto, and in some embodiments, the number of limiting protrusions 123 can be 3, 4, 5 or more. The number of limiting protrusions 123 can be set according to actual needs, and is not limited to the present embodiment.

[0085] It should be noted that any of the embodiments in the present embodiment can be independently implemented, or implemented in combination with one or more other embodiments. When implemented in combination, the combination manner should not be limited to the combination manners listed in the present embodiment.

[0086] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but the present application can be implemented in many different forms, and is not limited to the embodiments described in the specification. These embodiments are not additional limitations on the content of the present application, and the purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive. Furthermore, the above technical features continue to be combined with each other, forming various embodiments not listed above, which are all considered to be within the scope of the present application. Furthermore, for those skilled in the art, improvements or changes can be made based on the above description, and all these improvements and changes should be within the protection scope of the appended claims of the present application.

Claims

1. A portable fan characterized by, The portable fan comprises a fan shell, a fan assembly arranged in the fan shell, and a fan inlet and a fan outlet formed in the fan shell and communicating with the fan assembly. The fan inlet comprises a plurality of air inlet openings distributed on a plurality of surfaces of the fan shell, and a mixed flow space is formed in the fan shell and communicates with the plurality of air inlet openings and the fan assembly. The mixed flow space is provided with a mixed flow device connected with the fan shell and communicating with the fan assembly and the plurality of air inlet openings. The fan assembly is embedded and fixed in the fan shell.

2. The portable fan of claim 1, wherein, The fan assembly is a three-phase motor. The rated working voltage of the fan assembly is 6-8.4V or 9-12.6V. The rated working current of the fan assembly is 0.1-2.9A or 0.08-2.7A. The rated power of the fan assembly is 0.6-25W or 0.7-33W. The rotating speed of the fan assembly is 14000-48000 revolutions per minute. A shockproof silica gel sleeve is arranged between the fan assembly and the fan shell. One end of the mixed flow device is connected with the fan shell, and the other end of the mixed flow device abuts against the fan assembly. The mixed flow device is annular, and a side wall of the mixed flow device communicates with at least one air inlet opening.

3. The portable fan of claim 2, wherein, A plurality of air inlet windows are formed in the mixed flow device and correspond to the plurality of air inlet openings. The opening area of each air inlet window is smaller than that of the corresponding air inlet opening. The mixed flow device and the fan assembly are coaxially stacked, and the end diameter of the end of the mixed flow device abutting against the fan assembly is the same as the inner diameter of the fan assembly. The portable fan further comprises a battery assembly arranged on the two sides of the fan shell.

4. The portable fan of claim 3, wherein, The mixed flow device further comprises a partition plate arranged on the side facing the battery assembly. The end of the mixed flow device connected with the fan shell comprises a first connecting end and a second connecting end.

5. The portable fan of any one of claims 2-4, wherein, The first connecting end abuts against the fan shell, and the second connecting end is snap-connected with the fan shell.

6. The portable fan of claim 5, wherein, The partition plate comprises a first partition side wall and a second partition side wall arranged oppositely and connected with the inner surface of the fan shell.

7. The portable fan of claim 6, wherein, The fan shell comprises a first cavity and a second cavity, the fan assembly is arranged in the first cavity, the battery assembly is arranged in the second cavity, and the partition plate is arranged between the first cavity and the second cavity. The fan shell is provided with a support frame at the position of the first connecting end, and the first connecting end abuts against the support frame. The second connecting end extends away from the fan assembly to form a connecting claw, and the fan shell is provided with a clamping edge edge matched with the connecting claw.

8. The portable fan of claim 7, wherein, ​ ​ 9. The portable fan of claim 8, wherein, The first connecting end is in abutment with the support frame at a position recessed to form a limiting groove, and the limiting groove is in abutment with the support frame.

10. The portable fan of claim 8, wherein, The fan shell is protruded towards the flow mixer to form a plurality of limiting protrusions, and the plurality of limiting protrusions are in mutual abutment with the inner wall of the flow mixer.

Images