Portable fan

Abstract

The utility model provides a portable fan which comprises a shell, an air inlet, an air outlet and an air duct connected with the air inlet and the air outlet, and the air duct extends in the length direction of the shell; the motor is arranged in the air duct, the motor is a three-phase high-speed motor, and the motor comprises a stator assembly, a rotor assembly and a fan; the air blocking piece is arranged in the air duct, divides the air duct into a sub-air duct and a containing cavity and is provided with a ventilation opening, and the ventilation opening communicates with the sub-air duct and the containing cavity; when the fan rotates, wind is generated, most of the wind is blown out from the air outlet through the sub-air duct, and a small part of the wind is communicated with the containing cavity through the ventilation opening. The size of the sub-air ducts is reduced relative to that of the air duct, air generated by the fan is more concentrated after entering the sub-air ducts, and the air force blown out of the air outlet is larger. Moreover, the three-phase high-speed motor is used, so that the ultra-high-speed rotating blowing experience can be ensured on the basis of meeting the requirements of small size and convenience in carrying; in addition, a small part of wind circulates with the containing cavity through the ventilation opening, and noise caused by too large wind is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to a portable fan with excellent air outlet performance. Background Art

[0002] In recent years, as people's demand for portable hair-drying equipment has become increasingly higher, a wide variety of portable fans with rich categories and various forms have appeared on the market, such as neck-hanging fans, handheld fans, clip fans, etc.

[0003] However, after meeting the requirements of portability, existing portable fans are difficult to ensure wind force, air volume and wind efficiency. Portable fans with low wind force, insufficient air volume and low wind efficiency often give users a negative experience. Therefore, how to simultaneously meet the requirements of portability and excellent air output performance is an urgent problem that needs to be solved for portable fans. Summary of the invention

[0004] In view of this, the present application provides a portable fan, in which a wind shield is arranged in the air duct to divide the air duct into sub-air ducts. The volume of the sub-air ducts is reduced relative to the air duct, and the wind generated by the fan is more concentrated after entering the sub-air ducts, and the wind blown out from the air outlet is also stronger; and, by using a three-phase high-speed motor, an ultra-high-speed rotation and blowing experience can be guaranteed while meeting the requirements of a small volume and easy portability; in addition, a small part of the wind circulates with the cavity through the vent to prevent noise caused by excessive wind.

[0005] The present application provides a portable fan, comprising: a shell, comprising an air inlet, an air outlet, and an air duct connecting the air inlet and the air outlet, wherein the air duct extends along the length direction of the shell; a motor, arranged in the air duct, the motor is a three-phase high-speed motor, and the motor comprises a stator assembly, a rotor assembly and a fan; a wind shield, arranged in the air duct, the wind shield divides the air duct into a sub-air duct and a cavity, the wind shield is provided with a vent, and the vent connects the sub-air duct and the cavity; wherein, when the fan rotates, wind is generated, most of the wind is blown out from the air outlet via the sub-air duct, and a small part of the wind flows with the cavity via the vent.

[0006] The wind shield includes a first partition extending along the length direction of the air duct, and a second partition connected to one end of the first partition facing the motor, one end of the second partition is connected to the first partition, and the other end of the second partition abuts against a portion of the side wall of the air duct, so that the sub-air duct is formed between the wind shield and the other portion of the side wall of the air duct, and the vent is provided on the second partition.

[0007] The wind shield includes a first partition extending along the length direction of the air duct, and a second partition connected to one end of the first partition facing the motor, both ends of the second partition are connected to the first partition, one end of the first partition is connected to the second partition, and the other end of the first partition abuts against a portion of the side wall of the air duct, so that the sub-air duct is formed between the wind shield and the other portion of the side wall of the air duct, and the vent is provided on the second partition.

[0008] A power supply and a first circuit board electrically connected to the fan are provided in the cavity. The first circuit board is also electrically connected to a switch and an interface exposed outside the shell. The cavity is also provided with a heat dissipation port connected to the outside. A small portion of the wind generated by the rotation of the fan enters the cavity through the vent and is blown out from the heat dissipation port.

[0009] The shell includes a first shell and a second shell. The first shell and the second shell are connected to form the air duct. The wind shield is integrally extended from the inner wall of the first shell and / or the second shell.

[0010] A first circuit board electrically connected to the fan is provided in the cavity, the motor includes a cylinder, the cylinder includes an inner ring portion, an outer ring portion, and a plurality of connecting leaves connecting the inner ring portion and the outer ring portion, a substrate is formed in the inner ring portion, and a hollow shaft cylinder extends from the substrate in a first direction, a second circuit board is installed at one end of the inner ring portion facing away from the shaft cylinder, the second circuit board is electrically connected to the first circuit board, and the second circuit board is electrically connected to the stator assembly, and drives the rotor assembly to rotate, and the stator assembly, the rotor assembly and the shaft cylinder are nested.

[0011] The rotor assembly includes a rotating shaft, a bearing and a magnetic ring. The bearing sleeve is arranged on the outside of the rotating shaft. One end of the rotating shaft extends into the shaft cylinder in a second direction opposite to the first direction. The stator assembly is arranged on the radial outside of the shaft cylinder. The magnetic ring is arranged on the radial outside of the stator assembly. The other end of the rotating shaft fixes the fan.

[0012] The motor is arranged at a position of the air duct close to the air inlet, and the cross-sectional area of ​​the sub-duct close to the air outlet is smaller than the cross-sectional area of ​​the sub-duct close to the motor; the fan includes a hub, and a plurality of blades arranged around the outside of the hub, the outer surface of the hub is arc-shaped, and the hub radially increases and extends along the second direction.

[0013] A partition is also provided in the shell, and the partition divides the internal space of the shell into the air duct and the partition chamber; part of the edge of the wind shield abuts against the inner wall of the shell, and part of the edge of the wind shield abuts against the partition; it also includes a power supply and a first circuit board, the power supply is electrically connected to the first circuit board, the power supply and the first circuit board are arranged in the partition chamber, and the vent is also provided on the partition, and a small part of the wind generated by the fan is connected to the partition chamber via the vent.

[0014] Compared with the prior art, the portable fan of the present application has the following beneficial effects: the wind shield is arranged in the air duct to divide the air duct into the sub-air ducts, the volume of the sub-air ducts is reduced relative to the air duct, the wind generated by the fan is more concentrated after entering the sub-air ducts, and the wind blown out from the air outlet is also stronger; and, by using a three-phase high-speed motor, an ultra-high-speed rotation and blowing experience can be guaranteed while meeting the requirements of a small volume and easy portability; in addition, a small part of the wind circulates with the cavity through the vent to prevent noise caused by excessive wind. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional diagram of a portable fan provided in an embodiment of the present application;

[0016] Figure 2 is a cross-sectional view of a portable fan provided in an embodiment of the present application;

[0017] Figure 3 is a three-dimensional diagram of a motor provided in an embodiment of the present application;

[0018] Figure 4 is a cross-sectional view of a motor provided in an embodiment of the present application;

[0019] Figure 5 is a cross-sectional view of a portable fan provided in another embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to facilitate a better understanding of the purpose, structure, features, and functions of the present application, the present application is further described in conjunction with the accompanying drawings and specific implementation methods.

[0021] It should be noted that when an element is considered to be “connected to” another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0022] In this application, descriptions such as “first”, “second”, etc. are only used for descriptive purposes and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0023] In the description of the present application, the terms "front", "back", "left", "right", "up", "down", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0024] In one embodiment, Figure 1 and Figure 2 As shown, it is a schematic diagram of the portable fan of the present application, the portable fan comprises a housing 1, the housing 1 comprises an air inlet 11, an air outlet 12, and an air duct 13 connecting the air inlet 11 and the air outlet 12, the air duct 13 extends along the length direction of the housing 1. In the present embodiment, the housing 1 is in the shape of a long column, of course, in other embodiments, the housing 1 may also be in the shape of a long square, or other irregular shapes, without limitation thereto. In addition, in the present embodiment, the portable fan may be a handheld fan, in other embodiments, the portable fan may also be a desktop fan, a neck hanging fan or other fans, without limitation thereto.

[0025] In one embodiment, Figures 2 to 4 As shown, the portable fan also includes a motor. The motor is arranged in the air duct 13, and the motor is a three-phase high-speed motor. The three-phase high-speed motor has the advantages of high efficiency, low energy consumption, low noise, ultra-long life, high reliability, etc. The three-phase high-speed motor can provide a high-speed and stable rotation speed. The motor also includes a barrel 2, and the barrel 2 includes an inner ring portion 22, an outer ring portion 21, and a plurality of connecting leaves 23 connecting the inner ring portion 22 and the outer ring portion 21. A substrate 24 is formed in the inner ring portion 22, and a hollow shaft cylinder 25 axially extending from the substrate 24 in a first direction. The motor also includes a stator assembly 4, a rotor assembly 5 and a fan 6, and the stator assembly 4, the rotor assembly 5 and the shaft cylinder 25 are nested. In this embodiment, the first direction is parallel to the length direction of the housing 1. In other embodiments, the first direction may also be non-parallel to the length direction of the housing 1.

[0026] In one embodiment, Figures 2 to 4As shown, the rotor assembly 5 includes a rotating shaft 51, a bearing 52 and a magnetic ring 53, the bearing 52 is sleeved on the outside of the rotating shaft 51, one end of the rotating shaft 51 extends into the shaft cylinder 25 in a second direction opposite to the first direction, the stator assembly 4 is arranged on the radial outside of the shaft cylinder 25, the magnetic ring 53 is arranged on the radial outside of the stator assembly 4, and the other end of the rotating shaft 51 is fixed to the fan 6. That is, the motor is an outer rotor motor, which has the advantages of compact structure, easy installation, reliable operation, low noise, energy saving and high efficiency. In this embodiment, the first direction and the second direction are parallel to the axial direction.

[0027] In one embodiment, Figure 2 The portable fan further comprises a power supply 8 and a first circuit board 9 electrically connected to the motor. The first circuit board 9 is also electrically connected to a switch 91 and an interface 92 exposed outside the housing 1 .

[0028] In one embodiment, Figures 2 to 4 As shown, the motor also includes a second circuit board 3, which is installed at one end of the inner ring portion 22 facing away from the shaft tube 25. The second circuit board 3 is electrically connected to the stator assembly 4 and drives the rotor assembly 5 to rotate. The rotor assembly 5 is directly connected to the fan 6, and the rotor assembly 5 directly drives the fan 6 to rotate. The stator assembly 4 is composed of a winding coil, and the wire of the winding coil is led out and passes through the substrate 24 and fixed to the second circuit board 3, thereby realizing the electrical connection between the second circuit board 3 and the stator assembly 4. Compared with the traditional form of setting a steel needle on the stator assembly 4 and inserting the steel needle into the circuit board, the present application directly leads the wire of the winding coil to the circuit board, and the production process is simpler and more convenient, and the second circuit board 3 can be flexibly set at various positions of the portable fan. The first circuit board 9 is electrically connected to the second circuit board 3, and the interface 92 is connected to an external power supply, so that the external power supply can directly supply power to the motor, thereby ensuring the endurance of the motor. The power supply 8 is electrically connected to the second circuit board 3 via the first circuit board 9 , so when no external power source is connected, the power supply 8 can supply power to the motor.

[0029] In one embodiment, Figure 2As shown, the portable fan further includes a wind shield 7, which is arranged in the air duct 13, dividing the air duct 13 into a sub-air duct 15 and a cavity 14. The wind shield 7 is provided with a vent 73, and the vent 73 connects the sub-air duct 15 and the cavity 14. When the fan 6 rotates, wind is generated, and most of the wind is blown out from the air outlet 12 via the sub-air duct 15, that is, most of the wind flows through the air inlet 11, the air duct 13, the sub-air duct 15, and the air outlet 12 in sequence; a small part of the wind is communicated with the cavity 14 via the vent 73, that is, a small part of the wind flows through the air inlet 11, the air duct 13, the vent 73, and the cavity 14 in sequence. The wind shield 7 is arranged in the air duct 13 to divide the air duct 13 into the sub-air duct 15. The volume of the sub-air duct 15 is smaller than that of the air duct 13. The wind generated by the fan 6 is more concentrated after entering the sub-air duct 15, and the wind force blown out from the air outlet 12 is also greater. In addition, the motor used is a three-phase high-speed motor, which can ensure an ultra-high-speed rotation and blowing experience while meeting the requirements of small size and portability. In addition, by arranging a vent 73 on the wind shield 7, a small part of the wind circulates with the cavity 14 through the vent 73 to prevent noise caused by excessive wind.

[0030] In one embodiment, Figure 2 As shown, the wind shield 7 includes a first partition 71 extending along the length direction, and a second partition 72 connected to one end of the first partition 71 facing the motor. One end of the second partition 72 is connected to the first partition 71, and the other end of the second partition 72 abuts against a part of the side wall of the air duct 13, so that the sub-air duct 15 is formed between the wind shield 7 and another part of the side wall of the air duct 13. The second partition 72 is provided with the vent 73, and the vent 73 can be set in the second partition 72, or at the connection between the second partition 72 and the part of the side wall of the air duct 13, or at the connection between the second partition 72 and the first partition 71.

[0031] In another embodiment, Figure 5As shown, the wind shield 7 includes a first partition 71 extending along the length direction of the air duct 13, and a second partition 72 connected to one end of the first partition 71 facing the motor. The end of the second partition 72 is connected to the first partition 71, one end of the first partition 71 is connected to the second partition 72, and the other end of the first partition 71 abuts against a part of the side wall of the air duct 13, so that the sub-air duct 15 is formed between the wind shield 7 and another part of the side wall of the air duct 13. The second partition 72 is provided with the vent 73, and the vent 73 can be set in the second partition 72, or at the connection between the second partition 72 and the first partition 71.

[0032] In one embodiment, Figure 2 As shown, the chamber 14 is connected with the sub-air duct 15 through the vent 73, the power supply 8 and the first circuit board 9 are arranged in the chamber 14, and the chamber 14 is also provided with a heat dissipation port 16 connected to the outside, and a small part of the wind generated by the rotation of the fan 6 enters the chamber 14 through the vent 73 and blows toward the power supply 8 and the first circuit board 9, and is blown out from the heat dissipation port 16. The vent 73 not only reduces the noise of the portable fan, but also helps the power supply 8 and the first circuit board 9 to dissipate heat.

[0033] In one embodiment, Figure 1 and Figure 2 As shown, the shell 1 includes a first shell 1a and a second shell 1b, and the first shell 1a and the second shell 1b are connected to form the air duct 13. Part of the windshield 7 is formed by extending from the inner wall of the first shell 1a, and part of the windshield 7 is formed by extending from the inner wall of the second shell 1b. In other embodiments, the entire windshield 7 may be formed by extending from the inner wall of the first shell 1a, or the entire windshield 7 may be formed by extending from the inner wall of the second shell 1b, or the windshield 7 may be formed separately and then abut the inner wall of the shell 1. In another embodiment, the shell 1 includes a first shell 1a and a second shell 1b, and an inner shell is further provided in the shell 1, and the air duct 13 is formed in the inner shell, and the windshield 7 is arranged in the air duct 13 of the inner shell, and the windshield 7 may be formed by extending from the inner wall of the inner shell, or may be formed separately and then abut the inner wall of the inner shell.

[0034] In one embodiment, the motor is disposed in the air duct 13 near the air inlet 11, and the cross-sectional area of ​​the sub-air duct 15 near the air outlet 12 is smaller than the cross-sectional area of ​​the sub-air duct 15 near the motor, so that the air outlet is more concentrated and efficient.

[0035] In one embodiment, Figure 2 and Figure 4 As shown, the fan 6 includes a hub 61 and a plurality of blades 62 arranged around the outside of the hub 61. The outer side surface of the hub 61 is arc-shaped, and the hub 61 radially increases and extends along the second direction, that is, the outer side surface of the hub 61 is arc-shaped and expands outward, and the shape of the hub 61 has the effect of enhancing wind pressure.

[0036] In one embodiment, a partition (not shown, the same below) is further provided in the shell 1, and the partition divides the internal space of the shell 1 into the air duct 13 and the partition cavity (not shown, the same below), and the wind shield 7 further divides the air duct 13 into the sub-air duct 15 and the receiving cavity 14. Through two partitions, the volume of the sub-air duct 15 is further reduced, making the air outlet more concentrated. Part of the edge of the wind shield 7 abuts the inner wall of the shell 1, and part of the edge of the wind shield 7 abuts the partition. In this embodiment, the power supply 8 and the first circuit board 9 can be arranged in the partition cavity, and the vent 73 is also provided on the partition, and a small part of the wind generated by the fan 6 is connected to the partition cavity via the vent 73. It is also possible that one of the power supply 8 and the first circuit board 9 is arranged in the partition cavity, and the other is arranged in the receiving cavity 14; it is also possible that the power supply 8 and the first circuit board 9 are arranged in the receiving cavity 14.

[0037] The above detailed description is only an explanation of the preferred embodiment of the present application, and does not limit the patent scope of the present application. Therefore, all equivalent technical changes made by using the description and illustrations of this creation are included in the patent scope of this creation.

Claims

1. A portable fan, characterized in that: include: A shell, comprising an air inlet, an air outlet, and an air duct connecting the air inlet and the air outlet, wherein the air duct extends along the length direction of the shell; A motor is arranged in the air duct, the motor is a three-phase high-speed motor, and the motor includes a stator assembly, a rotor assembly and a fan; A wind shield is arranged in the air duct, the wind shield divides the air duct into a sub-air duct and a cavity, the wind shield is provided with a vent, and the vent connects the sub-air duct and the cavity; When the fan rotates, wind is generated, most of the wind is blown out from the air outlet via the sub-air duct, and a small part of the wind is communicated with the cavity via the vent.

2. The portable fan according to claim 1, characterized in that: The wind shield includes a first partition extending along the length direction of the air duct, and a second partition connected to one end of the first partition facing the motor, one end of the second partition is connected to the first partition, and the other end of the second partition abuts against a portion of the side wall of the air duct, so that the sub-air duct is formed between the wind shield and the other portion of the side wall of the air duct, and the vent is provided on the second partition.

3. The portable fan according to claim 1, characterized in that: The wind shield includes a first partition extending along the length direction of the air duct, and a second partition connected to one end of the first partition facing the motor, an end of the second partition is connected to the first partition, one end of the first partition is connected to the second partition, and the other end of the first partition abuts against a portion of the side wall of the air duct, so that the sub-air duct is formed between the wind shield and the other portion of the side wall of the air duct, and the vent is provided on the second partition.

4. The portable fan according to claim 2 or 3, characterized in that: A power supply and a first circuit board electrically connected to the fan are provided in the cavity. The first circuit board is also electrically connected to a switch and an interface exposed outside the shell. The cavity is also provided with a heat dissipation port connected to the outside. A small portion of the wind generated by the rotation of the fan enters the cavity through the vent and is blown out from the heat dissipation port.

5. The portable fan according to claim 1, characterized in that: The shell includes a first shell and a second shell. The first shell and the second shell are connected to form the air duct. The wind shield is integrally extended from the inner wall of the first shell and / or the second shell.

6. The portable fan according to claim 1, characterized in that: The shell comprises a first shell and a second shell. An inner shell is further provided in the shell. The air duct is formed in the inner shell. The wind shield is arranged in the air duct of the inner shell.

7. The portable fan according to claim 1, characterized in that: A first circuit board electrically connected to the fan is provided in the cavity, the motor includes a cylinder, the cylinder includes an inner ring portion, an outer ring portion, and a plurality of connecting leaves connecting the inner ring portion and the outer ring portion, a substrate is formed in the inner ring portion, and a hollow shaft cylinder extends from the substrate in a first direction, a second circuit board is installed at one end of the inner ring portion facing away from the shaft cylinder, the second circuit board is electrically connected to the first circuit board, and the second circuit board is electrically connected to the stator assembly, and drives the rotor assembly to rotate, and the stator assembly, the rotor assembly and the shaft cylinder are nested.

8. The portable fan according to claim 7, characterized in that: The rotor assembly includes a rotating shaft, a bearing and a magnetic ring. The bearing sleeve is arranged on the outside of the rotating shaft. One end of the rotating shaft extends into the shaft cylinder in a second direction opposite to the first direction. The stator assembly is arranged on the radial outside of the shaft cylinder. The magnetic ring is arranged on the radial outside of the stator assembly. The other end of the rotating shaft fixes the fan.

9. The portable fan according to claim 8, characterized in that: The motor is arranged at a position of the air duct close to the air inlet, and the cross-sectional area of ​​the sub-duct close to the air outlet is smaller than the cross-sectional area of ​​the sub-duct close to the motor; the fan includes a hub, and a plurality of blades arranged around the outside of the hub, the outer surface of the hub is arc-shaped, and the hub radially increases and extends along the second direction.

10. The portable fan according to claim 1, characterized in that: A partition is also provided in the shell, and the partition divides the internal space of the shell into the air duct and the partition chamber; part of the edge of the wind shield abuts against the inner wall of the shell, and part of the edge of the wind shield abuts against the partition; it also includes a power supply and a first circuit board, the power supply is electrically connected to the first circuit board, the power supply and the first circuit board are arranged in the partition chamber, and the vent is also provided on the partition, and a small part of the wind generated by the fan is connected to the partition chamber via the vent.

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