Portable fan

Abstract

The utility model discloses a portable fan. The portable fan comprises a fan body; the fan assembly is arranged in the fan main body; an air inlet and an air outlet are formed in the fan main body, the air inlet and the air outlet are formed in the same side of the fan main body, and an air duct communicated with the air inlet and the air outlet is formed in the fan main body. According to the portable fan manufactured through the scheme, due to the fact that the air inlet and the air outlet are both formed in the same side, it only needs to be guaranteed that no shielding object is arranged on the side where the air outlet and the air inlet are formed in the using process, the number of placing forms and using scenes of the fan is increased, and using convenience is improved.

Description

Technical Field

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

[0002] In the hot summer, fans have become a must-have item for people to get rid of the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0003] In the prior art, portable fans are usually designed as: two air inlets and air outlets arranged opposite to each other, and a fan assembly for promoting gas flow is arranged between the air inlet and the air outlet. The inventor of the present invention found in his research that the portable fans in the prior art must avoid the air inlet and the air outlet being blocked by obstacles during use, and because the air inlet and the air outlet are arranged opposite to each other, the available forms and usage scenarios of the portable fans are limited to a relatively small range. Utility Model Content

[0004] The purpose of the present application is to provide a portable fan in which the air inlet and the air outlet of the fan are arranged on the same side.

[0005] The present application provides a portable fan, comprising:

[0006] Fan body;

[0007] A fan assembly, wherein the fan assembly is disposed in the fan body;

[0008] An air inlet and an air outlet are provided on the fan body, the air inlet and the air outlet are provided on the same side of the fan body, and an air duct connecting the air inlet and the air outlet is provided in the fan body.

[0009] Optionally, the fan body comprises: a first shell and a second shell, the air outlet is provided on the first shell, the air inlet is provided on the second shell, the fan assembly is arranged in the first shell, the first shell and the second shell are connected by a flexible connecting sleeve, the air duct is arranged in the flexible connecting sleeve, and the air duct communicates with the first shell and the second shell; and / or,

[0010] The fan body or the fan assembly is provided with an air guide grille at the air outlet position. The fan blades in the fan assembly are radial blades. The width of the air guide grille gradually increases along the rotation direction of the fan blades.

[0011] Optionally, the air outlet is provided at one end of the first shell facing away from the flexible connection sleeve, and the air inlet is provided at one end of the second shell facing away from the flexible connection sleeve; and / or,

[0012] A first opening is formed at one end of the first shell opposite to the air outlet, a second opening is formed at one end of the second shell opposite to the air inlet, the flexible connecting sleeve is connected to the first opening and the second opening respectively, and the air duct connects the first opening and the second opening.

[0013] Optionally, a first stepped connecting piece is provided at the first opening, a second stepped connecting piece is provided at the second opening, one end of the flexible connecting sleeve is sleeved on the first stepped connecting piece, and the other end of the flexible connecting sleeve is sleeved on the second stepped connecting piece; and / or,

[0014] The cross-sectional area at the first opening is smaller than the cross-sectional area of ​​the air outlet, and the cross-sectional area at the second opening is smaller than the cross-sectional area of ​​the air inlet.

[0015] Optionally, a storage bin is provided between the first shell and the second shell, one end of the storage bin is connected to the first shell, and the other end of the storage bin is connected to the second shell.

[0016] Optionally, a notch is provided at one end of the first shell connected to the storage bin, the storage bin is connected to an edge of the notch, and the fan assembly is connected to a side surface of the storage bin located at the notch.

[0017] Optionally, the second shell and the storage bin are connected in a detachable manner; and / or;

[0018] An inserting groove is provided at the edge of the notch, and a side protrusion of the storage bin in contact with the notch is formed on an inserting stop edge matched with the inserting groove.

[0019] Optionally, a first magnetic component is provided on one side of the second shell connected to the storage bin, and a second magnetic component cooperating with the first magnetic component is provided on one end of the storage bin connected to the second shell.

[0020] Optionally, a partition is provided in the storage bin, and the partition divides the interior of the storage bin into a first cavity and a second cavity, a battery is provided in the first cavity, and a PCB circuit board is provided in the second cavity.

[0021] Optionally, a wiring groove is opened on the partition, the battery and the PCB circuit board are connected by a wire passing through the wiring groove, a key switch is arranged on the surface of the storage compartment, and the key switch is connected to the PCB circuit board through a wire.

[0022] The beneficial effect of the embodiment of the present application is that the air inlet and the air outlet are both arranged on the same side of the fan body, the fan assembly is arranged inside the fan body, and the air inlet and the air outlet are connected by an air duct, so that the fan assembly can push the airflow to enter from the air inlet and blow it out from the air outlet on the same side. The portable fan manufactured by this scheme, since the air inlet and the air outlet are both arranged on the same side, therefore, when in use, it is only necessary to ensure that there is no obstruction on the side where the air outlet and the air inlet are arranged, and the fan can be placed in more forms and use scenarios, thereby improving the convenience of use. At the same time, since the air inlet and the air outlet are arranged on the same side of the fan body, they can drive the air on the surface of the human body to flow, which can increase the amount of air flow in the blowing direction and improve the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 This is a schematic diagram of the overall structure of a portable fan according to a specific embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the exploded structure of a portable fan according to a specific embodiment of the present application;

[0026] Figure 3 This is an exploded schematic diagram of a first housing and a fan assembly according to a specific embodiment of the present application;

[0027] Figure 4 This is an exploded schematic diagram of a first shell, a second shell and a flexible connecting sleeve according to a specific embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of an exploded view of a storage bin according to a specific embodiment of the present application.

[0029] Description of the drawings: 1. Fan body; 11. First shell; 111. Air outlet; 112. Air guide grille; 113. First opening; 114. First step-shaped connector; 115. Notch; 116. Plug-in slot; 12. Second shell; 121. Air inlet; 122. Second opening; 123. Second step-shaped connector; 124. First magnetic component; 2. Fan component; 21. Fan motor; 22. Fan blades; 23. Fan housing; 3. Storage compartment; 31. Partition; 32. First cavity; 33. Second cavity; 34. Wiring trough; 35. Battery; 36. PCB circuit board; 37. Second magnetic component; 38. Plug-in stop edge. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying 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 there can be one or more centered elements between them. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements between them. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0032] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the overall structure of the portable fan of this embodiment; Figure 2 Schematic diagram of the exploded structure of the portable fan of this embodiment.

[0033] like Figure 1 and Figure 2 As shown, a portable fan comprises: a fan body 1 and a fan assembly 2. The fan assembly 2 is arranged in the fan body 1; the fan body 1 is provided with an air inlet 121 and an air outlet 111, the air inlet 121 and the air outlet 111 are arranged on the same side of the fan body 1, and an air duct connecting the air inlet 121 and the air outlet 111 is arranged in the fan body 1.

[0034] The fan body 1 can be an integrated structure. For example, the fan body 1 is a cylindrical structure, and an air inlet 121 and an air outlet 111 are respectively provided on the same side of the cylindrical structure, and the air inlet 121 and the air outlet 111 are connected by an air duct. However, the shape of the fan body 1 is not limited to the shape specified in the example. Depending on the specific application scenario, in some embodiments, the fan body 1 can be configured as (not limited to): a prism, a cube, a cuboid, a sphere, an ellipsoid, or other regular shapes. When the fan body 1 can be configured as a sphere or an ellipsoid, the air inlet 121 and the air outlet 111 are provided on the side surface of the same hemisphere.

[0035] In some embodiments, the fan body 1 is a split structure, and the split structure enables the fan body 1 to include: a first shell 11 and a second shell 12, and the first shell 11 and the second shell 12 are respectively provided with an air inlet 121 and an air outlet 111.

[0036] See also Figure 3 , Figure 3 This is a schematic diagram of the exploded view of the first housing and the fan assembly of this embodiment.

[0037] like Figure 3 As shown, the fan assembly 2 in this embodiment includes: fan blades 22 and a fan motor 21. The fan blades 22 and the fan motor 21 are integrated in a spatial structure multiplexing manner. Specifically, the fan blades 22 are mounted on the magnetic ring of the fan motor 21. However, the structure of the fan blades 22 and the fan motor 21 is not limited. In some embodiments, the fan blades 22 and the fan motor 21 can be a split structure, that is, the fan blades 22 and the fan motor 21 are only connected by a rotating shaft.

[0038] In some embodiments, the fan assembly 2 further includes: a fan housing 23, in which the fan blades 22 and the fan motor 21 are both disposed. The fan housing 23 encapsulates the fan blades 22 and the fan motor 21 into a standardized accessory.

[0039] In this embodiment, the fan blades 22 are radial fans. However, the structure of the fan blades 22 is not limited thereto. Depending on the specific application scenario, in some embodiments, the fan blades 22 can also be (not limited to) axial flow or mixed flow fans.

[0040] The air duct in this embodiment is a pipe connecting the air inlet 121 and the air outlet 111. The material forming the air duct can be (but not limited to): a metal pipe, a hard plastic pipe, a flexible plastic pipe, a flexible pipe, etc.

[0041] In the above embodiment, the air inlet 121 and the air outlet 111 are both arranged on the same side of the fan body 1, the fan assembly 2 is arranged inside the fan body 1, and the air inlet 121 and the air outlet 111 are connected by an air duct, so that the fan assembly 2 can push the airflow to enter from the air inlet 121 and then blow it out from the air outlet 111 on the same side. The portable fan manufactured by this scheme, since the air inlet 121 and the air outlet 111 are both arranged on the same side, therefore, when in use, it is only necessary to ensure that there is no shielding on the side where the air outlet 111 and the air inlet 121 are arranged, and the fan can be placed in more forms and use scenarios, thereby improving the convenience of use. At the same time, since the air inlet 121 and the air outlet 111 are arranged on the same side of the fan body 1, they can drive the air on the surface of the human body to flow, which can increase the amount of air flow in the blowing direction and improve the cooling effect.

[0042] In some embodiments, the fan body 1 includes: a first shell 11 and a second shell 12, the air outlet 111 is opened on the first shell 11, the air inlet 121 is opened on the second shell 12, the fan assembly 2 is arranged in the first shell 11, the first shell 11 and the second shell 12 are connected by a flexible connecting sleeve, the air duct is arranged in the flexible connecting sleeve, and the air duct connects the first shell 11 and the second shell 12.

[0043] The main bodies of the first shell 11 and the second shell 12 are both constructed as cuboids, and the cross-sectional area of ​​the first shell 11 and the second shell 12 and one end of the flexible connection sleeve gradually decreases. However, the shapes of the first shell 11 and the second shell 12 are not limited thereto. According to different specific application scenarios, in some embodiments, the shapes of the first shell 11 and the second shell 12 can be configured as (not limited to): columnar, prism, spherical, cube, hemispherical, etc.

[0044] In this embodiment, the flexible connecting sleeve can be: an elastic rubber sleeve or a flexible rubber product, or a composite sleeve with a rubber outer skin and a flexible metal tube inside.

[0045] The setting of the flexible connection sleeve can make the distance between the first shell 11 and the second shell 12 adjustable, so that the first shell 11 and the second shell 12 can be clamped and placed conveniently. The U-shaped or C-shaped structure of the flexible connection sleeve can make the portable fan hang on the user's neck or belt. At the same time, with the split structure of the first shell 11 and the second shell 12, it can provide the user with two cooling methods: extraction cooling and blowing cooling. Specifically, during extraction cooling, the second shell 12 is placed inside the user's clothes, while the first shell 11 is exposed. The opposite assembly method is used for blowing cooling.

[0046] The air outlet 111 is provided at one end of the first shell 11 facing away from the flexible connection sleeve, and the air inlet 121 is provided at one end of the second shell 12 facing away from the flexible connection sleeve. However, the arrangement positions of the air outlet 111 and the air inlet 121 are not limited thereto. According to different specific application scenarios, the air outlet 111 can be provided on the left side surface of the first shell 11, and the air inlet 121 can also be provided on the left side surface of the second shell 12; or, the air outlet 111 can be provided on the right side surface of the first shell 11, and the air inlet 121 can also be provided on the right side surface of the second shell 12; or, the air outlet 111 can be provided on the upper surface of the first shell 11, and the air inlet 121 can also be provided on the upper surface of the second shell 12; or, the air outlet 111 can be provided on the lower surface of the first shell 11, and the air inlet 121 can also be provided on the lower surface of the second shell 12.

[0047] The air outlet 111 is opened at one end of the first shell 11 facing away from the flexible connection sleeve, and the air inlet 121 is opened at one end of the second shell 12 facing away from the flexible connection sleeve. This minimizes the restriction of the shape of the portable fan on the air inlet 121 and the air outlet 111, makes the use scenarios more diverse, and improves the air outlet efficiency and the cooling effect.

[0048] See also Figure 4 , Figure 4 It is a schematic diagram of the exploded view of the first shell, the second shell and the flexible connecting sleeve of this embodiment.

[0049] like Figure 4 As shown, a first opening 113 is formed at one end of the first shell 11 opposite to the air outlet 111, and a second opening 122 is formed at one end of the second shell 12 opposite to the air inlet 121. The flexible connecting sleeve is respectively connected to the first opening 113 and the second opening 122, and the air duct connects the first opening 113 and the second opening 122.

[0050] A first stepped connection piece 114 is provided at the first opening 113, a second stepped connection piece 123 is provided at the second opening 122, one end of the flexible connection sleeve is sleeved on the first stepped connection piece 114, and the other end of the flexible connection sleeve is sleeved on the second stepped connection piece 123. The first stepped connection piece 114 and the second stepped connection piece 123 are connected to the flexible connection sleeve, so that the stability of the connection can be increased.

[0051] The connection method between the flexible connection sleeve and the first opening 113 and the second opening 122 is interference fit. However, the connection method between the flexible connection sleeve and the first opening 113 and the second opening 122 is not limited thereto. According to different specific application scenarios, in some embodiments, the connection method between the flexible connection sleeve and the first opening 113 and the second opening 122 can also be (not limited to): gluing, hot melt fastening, riveting, screw connection, clamping and other connection methods, and can also be a combination of two or more of the interference fit, gluing, hot melt fastening, riveting, screw connection, and clamping.

[0052] The cross-sectional area at the first opening 113 is smaller than the cross-sectional area of ​​the air outlet 111, and the cross-sectional area at the second opening 122 is smaller than the cross-sectional area of ​​the air inlet 121. By adopting this structure, the interface size of the flexible connecting sleeve can be reduced, making the portable fan more compact. At the same time, since the airflow flows from the air inlet 121 to the second opening 122, and then flows from the air duct to the first opening 113, due to the reduction of the cross-sectional area, the airflow in this process is in a pressurized state, which prompts the airflow to flow quickly into the first shell 11. When the gas flows into the excess weight of the first shell 11, due to the increase in the cross-sectional area, the airflow in this process is in a decompression state, reducing the high-speed airflow in the first shell 11. The high-speed flow collision, resulting in the probability of turbulence in the airflow, improves the air outlet efficiency of the fan assembly 2.

[0053] See also Figure 5 , Figure 5 Schematic diagram of the exploded view of the storage bin in this embodiment.

[0054] like Figure 5 As shown, in some embodiments, a storage bin 3 is provided between the first shell 11 and the second shell 12, one end of the storage bin 3 is connected to the first shell 11, and the other end of the storage bin 3 is connected to the second shell 12. The provision of the storage bin 3 can increase the storage space of the portable fan, and the storage bin 3 is provided between the first shell 11 and the second shell 12, which can avoid providing an additional storage space inside the portable fan, making the first shell 11, the second shell 12 and the inner surface of the flexible connecting sleeve smooth, reducing wind resistance, and improving the blowing efficiency of the portable fan.

[0055] In some embodiments, a notch 115 is provided at one end of the first housing 11 connected to the storage bin 3, the storage bin 3 is connected to the edge of the notch 115, and the fan assembly 2 is connected to the side of the storage bin 3 located at the notch 115. The notch 115 provided in the first housing 11 is connected to the storage bin 3 through the edge of the notch 115, so that part of the structure of the storage bin 3 can be extended into the notch 115. Through this clever use of space, the volume of the storage bin 3 leaking out can be reduced, making the overall structure of the portable fan more simple and compact.

[0056] A plug-in slot 116 is provided at the edge of the notch 115, and the side protrusions of the storage bin 3 in contact with the notch 115 are formed on the plug-in stop 38 that cooperates with the plug-in slot 116. However, the connection method between the storage bin 3 and the first shell 11 is not limited thereto. According to different specific application scenarios, in some embodiments, the edge of the storage bin 3 and the notch 115 can be fixed by (not limited to): snap connection, adhesive connection, interference fit, riveting, screw connection or hot melt.

[0057] In some embodiments, the first shell 11 does not have a notch 115 , and the storage compartment 3 is directly connected to a side surface of the first shell 11 .

[0058] The second shell 12 is connected to the storage compartment 3 in a detachable manner. The detachable connection between the second shell 12 and the storage compartment 3 facilitates the closure of the single-opening structure composed of the first shell 11, the second shell 12 and the flexible connection sleeve. The single-sided opening structure itself can be used as a clamping structure to clamp on an object that needs to be fixed, such as a belt, a collar of clothes, etc. The detachable connection method can strengthen this clamping structure and greatly improve the stability of the connection.

[0059] In some embodiments, a first magnetic component 124 is provided at one side where the second housing 12 is connected to the storage compartment 3, and a second magnetic component 37 that cooperates with the first magnetic component 124 is provided at one end where the storage compartment 3 is connected to the second housing 12. In this embodiment, the detachable connection between the second housing 12 and the storage compartment 3 is achieved by the cooperation of the first magnetic component 124 and the second magnetic component 37. Since the magnetic connection is the most convenient for disassembly, the magnetic connection is selected for detachable connection, which is convenient for users to clamp and use and store the portable fan, and improves the stability of the clamping connection while improving the convenience of using the portable fan.

[0060] The first magnetic component 124 is composed of four magnetic blocks made of magnets or magnetic metals. The second magnetic component 37 is also composed of four magnetic blocks made of magnets or magnetic metals. The four magnetic blocks of the first magnetic component 124 are arranged on the side surface of the second shell 12 facing the storage compartment 3, and the corresponding four magnetic blocks of the second magnetic component 37 are arranged on the surface of the storage compartment 3 facing the second shell 12. The external magnetic blocks maximize the magnetic connection, improve the stability of the magnetic connection, and reduce the risk of the portable fan falling.

[0061] The number of magnetic blocks constituting the first magnetic component 124 or the second magnetic component 37 is not limited to four. Depending on the specific application scenario, in some embodiments, the number of magnetic blocks constituting the first magnetic component 124 or the second magnetic component 37 can be (not limited to) 1, 2, 3, 5, 6 or more.

[0062] In some embodiments, the first magnetic attraction component 124 is disposed on the inner surface of the side wall of the second housing 12 facing the storage compartment 3. The second magnetic attraction component 37 is disposed on the inner surface of the side wall of the storage compartment 3 facing the second housing 12. This built-in structure can reduce the damage to the magnetic attraction block during use and extend its service life.

[0063] In some embodiments, the detachable manner of the second shell 12 and the storage compartment 3 is not limited to magnetic connection. Depending on the specific application scenario, the detachable manner of the second shell 12 and the storage compartment 3 can be (but not limited to): snap connection, lock connection, screw connection, Velcro connection, etc.

[0064] In some embodiments, a partition 31 is provided in the storage compartment 3, and the partition 31 divides the interior of the storage compartment 3 into a first cavity 32 and a second cavity 33. The battery 35 is provided in the first cavity 32, and the PCB circuit board 36 is provided in the second cavity 33. By providing the partition 31 to divide the interior of the storage compartment 3 into the first cavity 32 and the second cavity 33, the battery 35 and the PCB circuit board 36 can be provided independently of each other, thereby reducing the intensity of electromagnetic interference between the battery 35 and the PCB circuit board 36. At the same time, it can also prevent the battery 35 from shaking during use and touching the PCB circuit board 36, thereby improving the safety of the PCB circuit board 36.

[0065] In some embodiments, a wiring groove 34 is provided on the partition 31, and the battery 35 and the PCB circuit board 36 are connected by a wire passing through the wiring groove 34. A key switch is provided on the surface of the storage compartment 3, and the key switch is connected to the PCB circuit board 36 through a wire. Providing the wiring groove 34 can prevent the wire from being connected by crossing the partition 31, reduce the risk of the wire being squeezed by the inner surface of the storage compartment 3, and improve the safety of the wire. At the same time, routing through the wiring groove 34 avoids the wire occupying the thickness space of the storage compartment 3, which can make the battery 35 larger and improve the durability of the portable fan; similarly, it can also allow the PCB circuit board 36 to have a larger space, reduce the density of the arrangement of electronic components, and improve the heat dissipation efficiency.

[0066] In some embodiments, the fan body 1 or the fan assembly 2 is provided with an air guide grille 112 at the air outlet 111, the fan blades 22 in the fan assembly 2 are radial blades, and the width of the air guide grille 112 gradually increases along the rotation direction of the fan blades 22. In this embodiment, when the fan assembly 2 is provided with a fan housing 23, the air guide grille 112 is embedded in the fan housing 23. When the fan assembly 2 is not provided with a fan housing 23, the air guide grille 112 is embedded in the first housing 11.

[0067] Since the fan blades 22 in the fan assembly 2 are radial blades, the airflow needs to be reversed and then blown out during its rotation. This blowing method makes the airflow mainly concentrated on the side pointed by the turning direction of the fan blades 22. The airflow intensity on this side is greater, so a longer guide space is required. The width of the air grille gradually widens along the rotation direction of the fan blades 22. According to this air outlet feature, the wind guiding capacity on the main air outlet side can be further enhanced, thereby improving the directional air supply capability of the portable fan.

[0068] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination method should not be limited to the combination methods listed in this embodiment.

[0069] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, 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 intended to be additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the present invention; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A portable fan, characterized in that: include: Fan body; A fan assembly, wherein the fan assembly is disposed in the fan body; An air inlet and an air outlet are provided on the fan body, the air inlet and the air outlet are provided on the same side of the fan body, and an air duct connecting the air inlet and the air outlet is provided in the fan body.

2. The portable fan according to claim 1, characterized in that: The fan body comprises: a first shell and a second shell, the air outlet is provided on the first shell, the air inlet is provided on the second shell, the fan assembly is arranged in the first shell, the first shell and the second shell are connected by a flexible connecting sleeve, the air duct is arranged in the flexible connecting sleeve, and the air duct communicates with the first shell and the second shell; and / or, The fan body or the fan assembly is provided with an air guide grille at the air outlet position. The fan blades in the fan assembly are radial blades. The width of the air guide grille gradually increases along the rotation direction of the fan blades.

3. The portable fan according to claim 2, characterized in that: The air outlet is provided at one end of the first shell facing away from the flexible connection sleeve, and the air inlet is provided at one end of the second shell facing away from the flexible connection sleeve; and / or, A first opening is formed at one end of the first shell opposite to the air outlet, a second opening is formed at one end of the second shell opposite to the air inlet, the flexible connecting sleeve is connected to the first opening and the second opening respectively, and the air duct connects the first opening and the second opening.

4. The portable fan according to claim 3, characterized in that: A first step-shaped connecting piece is provided at the first opening, a second step-shaped connecting piece is provided at the second opening, one end of the flexible connecting sleeve is sleeved on the first step-shaped connecting piece, and the other end of the flexible connecting sleeve is sleeved on the second step-shaped connecting piece; and / or, The cross-sectional area at the first opening is smaller than the cross-sectional area of ​​the air outlet, and the cross-sectional area at the second opening is smaller than the cross-sectional area of ​​the air inlet.

5. The portable fan according to claim 2, characterized in that: A storage bin is disposed between the first shell and the second shell, one end of the storage bin is connected to the first shell, and the other end of the storage bin is connected to the second shell.

6. The portable fan according to claim 5, characterized in that A notch is provided at one end of the first shell body connected to the storage bin, the storage bin is connected to the edge of the notch, and the fan assembly is connected to the side surface of the storage bin located at the notch.

7. The portable fan according to claim 6, characterized in that The second shell is connected to the storage bin in a detachable manner; and / or; An inserting groove is provided at the edge of the notch, and a side protrusion of the storage bin in contact with the notch is formed on an inserting stop edge matched with the inserting groove.

8. The portable fan according to claim 7, characterized in that: A first magnetic component is disposed on one side of the second shell connected to the storage bin, and a second magnetic component cooperating with the first magnetic component is disposed on one end of the storage bin connected to the second shell.

9. The portable fan according to claim 5, characterized in that: A partition is arranged in the storage bin, and the partition divides the interior of the storage bin into a first cavity and a second cavity. A battery is arranged in the first cavity, and a PCB circuit board is arranged in the second cavity.

10. The portable fan according to claim 9, characterized in that A wiring groove is provided on the partition, the battery and the PCB circuit board are connected by a wire passing through the wiring groove, a key switch is provided on the surface of the storage compartment, and the key switch is connected to the PCB circuit board through a wire.

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