Portable Fan

Abstract

The present application provides a portable fan, the portable fan including a housing, a fan assembly, and an anion module, the housing having an air inlet, a receiving cavity, an air duct, and an air outlet that are sequentially connected to each other, the housing including a first side wall having the air outlet, the fan assembly being received in the receiving cavity, the fan assembly being used to blow air from the air inlet through the air duct to the air outlet, the negative ion module being received in the housing, the negative ion module including a negative ion generator, a positive electrode emitting part, and a negative electrode emitting part, and when the negative ion generator is operated, a discharge occurs between the positive electrode emitting part and the negative electrode emitting part, the air is ionized, negative ions are generated, and the negative ions are emitted from the housing.

Description

[Technical field]

[0001] The present application relates to the field of fans, and more particularly to safe portable fans that contain negative ions. [Background technology]

[0002] As people's living standards improve, people's demands for air quality are gradually increasing, and they expect the air in their surroundings to be purified. However, most portable fans currently on the market only have a blowing function and cannot purify the air. Some portable fans are equipped with a negative ion module that generates negative ions and can purify the air by using the sterilization and disinfection functions of negative ions.

[0003] However, conventional negative ion modules directly supply voltage to the negative ion generator via a battery, which then causes the negative ion generator to generate negative ions to purify the air. When a battery supplies high voltage to a negative ion generator, electrical leakage and static electricity are likely to occur, and safety issues such as electric shocks are likely to occur when living creatures or objects approach. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application provides a portable fan, and by simultaneously installing a positive electrode emission part and a negative electrode emission part, it is possible to avoid the generation of microcurrent caused by a short circuit with the human body, and thereby improve the safety of the product. [Means for solving the problem]

[0005] The present application provides a portable fan, the portable fan including a housing, a fan assembly, and a negative ion module, the housing being provided with an air inlet, an accommodating cavity, an air duct, and an air outlet, which are sequentially connected to each other, the housing including a first side wall in which the air outlet is disposed, the fan assembly being accommodated in the accommodating cavity and used to blow air from the air inlet to the air outlet via the air duct, the negative ion module being provided in the housing, the negative ion module including a negative ion generator, a positive electrode emitting portion, and a negative electrode emitting portion, and when the negative ion generator is operated, a discharge occurs between the positive electrode emitting portion and the negative electrode emitting portion, the air is ionized to generate negative ions, and the negative ions are discharged from the housing.

[0006] Compared with the prior art, the beneficial effects of the portable fan of the present application are as follows: The negative ion module is installed in the portable fan, which has the additional function of sterilizing, disinfecting and purifying the air. In addition, the positive and negative emission parts are installed simultaneously, which avoids the generation of microcurrents caused by short circuits with the human body, and improves the safety performance of the product. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view showing a first embodiment of a portable fan according to a first embodiment of the present application. [Diagram 2] FIG. 2 is a cross-sectional view of FIG. [Diagram 3] FIG. 2 is a partial exploded view of the left side of the first portion of the first embodiment of the portable fan according to the first embodiment of the present application. [Figure 4] FIG. 2 is another partial exploded view of the first portion of the first embodiment of the portable fan according to Example 1 of the present application. [Diagram 5] FIG. 2 is a partial exploded view of a third portion of the first embodiment of the portable fan of the present application, as viewed from above. [Figure 6] FIG. 1 is a bottom view showing a first embodiment of a portable fan according to a first embodiment of the present application. [Figure 7] FIG. 2 is an exploded view of the support part and the third portion of the first embodiment of the portable fan in accordance with Example 1 of the present application, viewed from below. [Figure 8] FIG. 2 is a perspective view showing a second embodiment of the portable fan according to the first embodiment of the present application. [Figure 9] FIG. 9 is a cross-sectional view of FIG. [Figure 10] FIG. 11 is a perspective view showing a third embodiment of the portable fan according to the first embodiment of the present application. [Figure 11] FIG. 11 is a cross-sectional view of FIG. [Figure 12] FIG. 11 is a perspective view of a portable fan according to a second embodiment of the present application. [Figure 13] FIG. 11 is a partial exploded view of a first portion of a portable fan according to a second embodiment of the present application, viewed from the left side. [Figure 14] FIG. 14 is an enlarged view of part A in FIG. [Figure 15] FIG. 11 is another partial exploded view of the first portion of the portable fan according to the second embodiment of the present application. [Figure 16] FIG. 11 is a partial exploded top view of a third part of the portable fan according to the second embodiment of the present application. [Figure 17] FIG. 11 is a bottom view of a portable fan according to a second embodiment of the present application. [Figure 18] FIG. 11 is an exploded bottom view of the support part and the third part of the portable fan according to the second embodiment of the present application. [Figure 19] FIG. 11 is a perspective view of a portable fan according to a third embodiment of the present application. [Figure 20] FIG. 11 is a perspective view of the portable fan according to the third embodiment of the present application from another angle. [Figure 21] FIG. 11 is a cross-sectional view of a portable fan according to a third embodiment of the present application. [Figure 22] FIG. 22 is an enlarged view of part A in FIG. 21. [Diagram 23] FIG. 4 is an exploded schematic view of a support member. [Figure 24] FIG. 11 is a partial exploded view of a portable fan according to a third embodiment of the present application. [Diagram 25] FIG. 13 is an exploded schematic view of a second side wall of one clamp arm. [Figure 26] FIG. 11 is a partial exploded view of a portable fan according to a third embodiment of the present application. [Figure 27] FIG. 11 is a partial exploded view of a portable fan according to a third embodiment of the present application. [Figure 28] FIG. 11 is an exploded view of a rotating connector in a portable fan according to a third embodiment of the present application. [Figure 29] FIG. 11 is a perspective view of a portable fan according to a fourth embodiment of the present application. [Diagram 30] FIG. 11 is a perspective view of the portable fan according to the fourth embodiment of the present application, seen from another angle. [Diagram 31] FIG. 11 is a cross-sectional view of a portable fan according to a fourth embodiment of the present application. [Diagram 32] FIG. 32 is an enlarged view of part A in FIG. 31. [Diagram 33] FIG. 11 is an exploded schematic view of a support member of the portable fan according to the fourth embodiment of the present application. [Diagram 34] FIG. 11 is an exploded schematic view of a second side wall of one clamp arm of the portable fan in Example 4 of the present application. [Diagram 35] FIG. 2 is a circuit schematic diagram of the main control chip of the main control circuit of the fan drive circuit provided by the first embodiment of the present application; [Diagram 36] FIG. 2 is a schematic configuration diagram of a three-phase drive circuit and a current detection circuit of the fan drive circuit provided by the first embodiment of the present application. [Figure 37] 1 is a schematic configuration diagram of a back electromotive force detection circuit of a fan drive circuit according to a first embodiment of the present application. [Figure 38] FIG. 2 is a schematic configuration diagram of an interface circuit and a charge management circuit of the fan driving circuit provided by the first embodiment of the present application. [Figure 39] FIG. 11 is a schematic configuration diagram of an auxiliary chip of the main control circuit of the fan driving circuit provided in Example 5 of the present application. [Diagram 40] FIG. 11 is a schematic circuit structure diagram of an indicator light branch and a button of a fan driving circuit provided in Example 5 of the present application. [Diagram 41] FIG. 11 is a schematic configuration diagram of a first speed control device of a fan drive circuit provided in Example 5 of the present application. [Diagram 42] FIG. 11 is a schematic configuration diagram of a second speed control device of a fan drive circuit provided in Example 5 of the present application. [Diagram 43] FIG. 11 is a schematic configuration diagram of a main control circuit of a fan drive circuit provided in Example 5 of the present application. [Diagram 44] FIG. 11 is a schematic configuration diagram of a three-phase drive circuit and a current detection circuit of a fan drive circuit provided in Example 5 of the present application. [Diagram 45] FIG. 11 is a schematic configuration diagram of a back electromotive force detection circuit of a fan drive circuit provided in a fifth embodiment of the present application. [Diagram 46] FIG. 13 is a schematic diagram of a transistor temperature detection circuit of a fan driving circuit provided in Example 5 of the present application. [Figure 47] FIG. 11 is a schematic diagram of a battery voltage detection circuit of a fan drive circuit according to a fifth embodiment of the present application. [Figure 48] FIG. 11 is a schematic diagram of a burn interface of a fan drive circuit provided in Example 5 of the present application. [Figure 49] FIG. 11 is a schematic configuration diagram of the main control chip of the main control circuit of the fan drive circuit provided in Example 5 of the present application. [Figure 50] FIG. 11 is a schematic configuration diagram of a three-phase drive circuit and a battery voltage and current detection circuit of the fan drive circuit provided in Example 5 of the present application. [Figure 51] FIG. 11 is a schematic configuration diagram of three three-phase control chips of the main control circuit of the fan drive circuit provided in Example 5 of the present application. [Figure 52] FIG. 11 is a schematic configuration diagram of a signal amplifier circuit of a fan drive circuit provided in Example 5 of the present application. [Figure 53] FIG. 11 is a schematic configuration diagram of a transistor temperature detection circuit of a fan drive circuit provided in Example 5 of the present application. [Figure 54] FIG. 11 is a schematic configuration diagram of a light control circuit of a fan drive circuit provided in Example 5 of the present application. [Figure 55] FIG. 11 is a schematic configuration diagram of a Hall detection circuit of a fan drive circuit provided in Example 5 of the present application. [Figure 56] FIG. 11 is a schematic configuration diagram of a switch control circuit of a fan drive circuit provided in Example 5 of the present application. [Figure 57] FIG. 11 is a schematic configuration diagram of a DC conversion circuit of a fan drive circuit provided in Example 5 of the present application. [Figure 58] FIG. 1 is a schematic block structural diagram of a portable fan provided by the present application. [Figure 59] FIG. 13 is an exploded view of a portable fan according to a sixth embodiment of the present application. [Figure 60] FIG. 11 is a partial cross-sectional view of a portable fan according to a sixth embodiment of the present application. [Figure 61] FIG. 13 is a schematic diagram of an axial tube of a portable fan in Example 6 of the present application. [Figure 62] FIG. 13 is a schematic diagram of a ring-shaped body of a portable fan in Example 6 of the present application. [Figure 63] FIG. 13 is a schematic diagram of disassembled members of a portable fan in Example 6 of the present application. [Figure 64] FIG. 13 is a schematic diagram of a housing of a portable fan in Example 6 of the present application. [Figure 65] FIG. 13 is a schematic diagram of another housing of the portable fan in Example 6 of the present application. [Figure 66] FIG. 13 is a perspective view of a portable fan according to a seventh embodiment of the present application. [Figure 67] FIG. 13 is a perspective view of the portable fan according to the seventh embodiment of the present application from another angle. [Figure 68] FIG. 11 is a cross-sectional view of a portable fan according to a seventh embodiment of the present application. [Figure 69] FIG. 69 is an enlarged view of part A in FIG. 68. [Figure 70] FIG. 13 is an exploded schematic view of a support member in Example 7 of the present application. [Figure 71] FIG. 11 is a partial exploded view of a portable fan according to a seventh embodiment of the present application. [Figure 72] FIG. 13 is an exploded schematic view of a second side wall of one clamp arm in the seventh embodiment of the present application. [Figure 73]FIG. 11 is a partial exploded view of a portable fan according to a seventh embodiment of the present application. [Figure 74] FIG. 11 is a partial exploded view of a portable fan according to a seventh embodiment of the present application. [Figure 75] FIG. 13 is an exploded view of a rotating connector in a portable fan according to a seventh embodiment of the present application. [Figure 76] FIG. 13 is a schematic three-dimensional view of a portable fan according to Example 8 of the present application. [Figure 77] FIG. 13 is a schematic three-dimensional view of the portable fan according to Example 8 of the present application viewed from another angle. [Figure 78] FIG. 13 is an exploded perspective view of a portable fan according to an eighth embodiment of the present application. [Figure 79] FIG. 13 is a perspective view of a rotational connection structure of a portable fan in Example 8 of the present application. [Figure 80] FIG. 79 is an exploded view of FIG. [Figure 81] FIG. 13 is a perspective view of a portable fan according to an eighth embodiment of the present application. [Figure 82] FIG. 82 is an exploded view of FIG. 81. [Figure 83] FIG. 2 is an exploded view of the portable fan of the present application. [Figure 84] FIG. 2 is a partial cross-sectional view of the portable fan of the present application. [Figure 85] FIG. 2 is a schematic diagram of an axial tube of the portable fan of the present application. [Figure 86] FIG. 2 is a schematic diagram of the toroid of the portable fan of the present application. [Figure 87] FIG. 2 is a schematic diagram of a turntable of the portable fan of the present application. [Figure 88] FIG. 2 is a schematic diagram of a housing of the portable fan of the present application. [Figure 89] FIG. 2 is a schematic diagram of another housing of the portable fan of the present application. [Figure 90] FIG. 16 is a front view of the first embodiment of the portable fan in Example 10 of the present application. [Figure 91] FIG. 91 is a schematic diagram of the two clamp arms translated in FIG. 90. [Figure 92] FIG. 92 is a schematic perspective view of the upper cover from which the connecting member is removed in FIG. 91. [Figure 93] FIG. 91 is a front view of the two clamp arms of FIG. 90 in close proximity. [Figure 94] FIG. 91 is a front view of the two clamp arms of FIG. 90 when they are extremely apart. [Figure 95] FIG. 23 is a schematic perspective view of one clamp arm from which the second shell and one baffle have been removed in a tenth embodiment of the present application. [Figure 96] FIG. 96 is a perspective view of FIG. 95 with a portion of the partition removed. [Figure 97] Example 10 of the present application is a three-dimensional schematic view of a state in which two baffles on the first shell and a support pad on the connecting member are removed. [Figure 98] FIG. 1 is a partial exploded schematic diagram of Example 10 of the present application. [Figure 99] FIG. 91 is a cross-sectional view of FIG. 90. [Figure 100] FIG. 13 is a cross-sectional view of a portable fan according to a tenth embodiment of the present application. [Figure 101] FIG. 15 is a partial schematic diagram of a portable fan according to Example 11 of the present application. [Figure 102] FIG. 15 is a partial circuit diagram of a portable fan according to an eleventh embodiment of the present application. [Figure 103] FIG. 15 is a perspective view of a portable fan according to an eleventh embodiment of the present application. [Figure 104] FIG. 104 is a partial exploded view of the portable fan shown in FIG. 103. [Figure 105] FIG. 23 is a perspective view of a first implementation form of Example 12 of the present application. [Figure 106] FIG. 105 is a partial cross-sectional view of FIG. [Figure 107] FIG. 23 is a perspective view of a second embodiment of Example 12 of the present application. [Figure 108] FIG. 107 is a partial cross-sectional view of FIG. [Fig. 109] FIG. 23 is a perspective view of a third embodiment of Example 12 of the present application. [Figure 110] FIG. 109 is a partial cross-sectional view of FIG. [Figure 111] FIG. 2 is a schematic structural diagram of a fan provided in Example 13 of the present application. [Figure 112] FIG. 2 is a schematic structural diagram of a fan from another perspective provided in Example 13 of the present application. [Figure 113] FIG. 23 is a schematic structural diagram of the fan provided in Example 13 of the present application with some parts removed. [Fig. 114] FIG. 23 is a schematic structural diagram of the fan provided in Example 13 of the present application with some parts removed. [Fig. 115] FIG. 23 is a schematic structural diagram of the fan provided in Example 13 of the present application with some parts removed. [Fig. 116] FIG. 23 is a schematic structural diagram of the fan provided in Example 13 of the present application with some parts removed. [Fig. 117] FIG. 23 is a partial cross-sectional view of a fan provided in Example 13 of the present application. [Fig. 118] FIG. 118 is a partially enlarged view of area B in FIG. [Figure 119] FIG. 23 is a partial cross-sectional view of a fan provided in Example 13 of the present application. [Figure 120] FIG. 120 is a partially enlarged view of area A in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to facilitate understanding of the objectives, structure, features, functions, etc. of the present application, the portable fan of the present application will be further described with reference to the drawings and specific embodiments.

[0009] Example 1 As shown in Figures 1 to 7, these are schematic diagrams of a first embodiment of the portable fan of the present application. The portable fan includes a housing 1, a fan assembly 2, and an anion module 4. The fan assembly 2 is accommodated in the accommodation cavity 118. The negative ion module 4 is provided in the housing 1. The housing 1 is provided with an air inlet 117, an accommodation cavity 118, an air duct 119, and an air outlet 120, which are sequentially connected to each other. The fan assembly 2 is used to blow air from the air inlet 117 to the air outlet 120 through the air duct 119. The negative ion module 4 includes a negative ion generator 41, a positive electrode emitting part 43, and a negative electrode emitting part 42. When the negative ion generator 41 is operated, a discharge occurs between the positive electrode emitting part 43 and the negative electrode emitting part 42, which ionizes the air, generates negative ions, and the negative ions are discharged from the housing 1.

[0010] 1 to 3, the housing 1 includes a first side wall 113 having the air outlet 120, a second side wall 114 facing the neck of the human body, and a third side wall 115 away from the neck of the human body. The first side wall 113 is connected to the second side wall 114 and the third side wall 115. The housing 1 includes a fourth side wall 116 facing the first side wall 113 and connecting the second side wall 114 and the third side wall 115.

[0011] 1 to 3, in this embodiment, the housing 1 includes the first part 110, the second part 111, and a third part 112 pivotally connecting the first part 110 and the second part 111. The first part 110 and the second part 111 are arranged symmetrically, and the third part 112 is pivotally connected to the first part 110 and the second part 111, respectively, so that by rotating the first part 110 and / or the second part, the opening size of the free end of the portable fan can be changed, making it easier to attach the portable fan.

[0012] As shown in FIG. 2, FIG. 3 and FIG. 5, the first part 110, the second part 111 and the third part 112 are provided with the air inlet 117, the receiving cavity 118, the air duct 119 and the air outlet 120, which are all sequentially connected to each other. The fan assembly 2 is provided corresponding to each receiving cavity 118. The portable fan is divided into three parts, and the fan assembly 2 is provided in each part. The wind outflow from each part is uniform, and the wind outflow effect is better. In another embodiment, the air inlet 117, the receiving cavity 118, the air duct 119 and the air outlet 120 may be provided in any two or any one of the first part 110, the second part 111 and the third part 112.

[0013] As shown in Figures 2, 3 and 5, the receiving cavity 118 of the first part 110 and the second part 111 is located at a free end, and the receiving cavity 118 of the third part 112 is located at a central part. One air duct 119 is provided on each side of the receiving cavity 118 of the third part 112. The negative ion module 4 is provided in both the first part 110 and the second part 111. In other embodiments, the negative ion module 4 may be provided in the first part 110 or the second part 111. The negative ion module 4 is provided in the portable fan and has an additional function of sterilizing, disinfecting and purifying the air, improving a better user experience.

[0014] As shown in FIGS. 2 to 5, the first portion 110 is provided with the air inlet 117 in both the second side wall 114 and the third side wall 115 corresponding to the fan assembly 2. The first portion 110 also includes a partition assembly 3. The partition assembly 3 includes a vertical plate 31, a first horizontal plate 32, and a second horizontal plate 34. The vertical plate 31, the first horizontal plate 32, the second horizontal plate 34, and the inner wall of the housing 1 collectively form the receiving cavity 118 and the air duct 119. A first space M is formed between the first horizontal plate 32 and the inner wall of the housing 1, and the negative ion module 4 is disposed in the first space M. In this embodiment, the first portion 110 has a groove 122 exposed to the outside at a position corresponding to the first space M, and the groove 122 is formed with a first outlet 123 and a second outlet 124 connecting the first space M with the outside. The first outlet 123 is provided with the negative electrode outlet 42, and the second outlet 124 is provided with the positive electrode outlet 43. By providing the positive electrode outlet 43 and the negative electrode outlet 42 simultaneously, it is possible to prevent the generation of minute currents due to short circuits with the human body, and the safety performance of the product is improved.

[0015] 2 to 4, in this embodiment, the first horizontal plate 32 of the first portion 110 is not provided with a first through hole 321 communicating between the air duct 119 and the first space M. In other embodiments, the first horizontal plate 32 may be provided with a first through hole 321 communicating between the air duct 119 and the first space M, and a portion of the wind generated by the fan assembly 2 is blown out toward the first space M through the first through hole 321.

[0016] As shown in FIGS. 2 to 4, the first horizontal plate 32 of the first portion 110 includes a baffle 33 extending vertically and abutting against the second horizontal plate 34, and the baffle 33 is disposed between the receiving cavity 118 and the air duct 119. One end of the baffle 33 abuts against the first side wall 113, and an exhaust port 121 is formed between the other end of the baffle 33 and the vertical plate 31, and the wind generated by the fan assembly 2 enters the air duct 119 from the exhaust port 121. The air outlet 120 may be provided in a projection area of ​​the baffle 33 on the first side wall 113. By disposing the baffle 33, a smaller exhaust port 121 is formed, and the wind pressure increases and the travel distance of the wind increases, so that the wind can be blown out to the air outlet 120 farther from the fan assembly 2, and the difference in wind force between the air outlets 120 located at various positions can be reduced. In addition, the air outlet 120 may be provided in the projection area of ​​the baffle 33 on the first side wall 113. The installation range of the air outlet 120 is wide, the air outlet range is increased, and it has the effect of relieving pressure, preventing noise caused by blocking of wind, and reducing wind noise. The baffle 33 can also prevent hair from entering the receiving cavity 118, thereby avoiding the risk of hair entanglement. The second part 111 is disposed symmetrically to the first part 110 and has a symmetrical structure, which will not be described again here.

[0017] As shown in FIG. 2, FIG. 5, FIG. 6 and FIG. 7, in the third part 112, the second side wall 114 and the third side wall 115 of the third part 112 are all provided with the air inlet 117, a receiving cavity 118 is installed in the center part, and one air duct 119 is provided on each side of the receiving cavity 118 of the third part 112. That is, the third part 112 has two air ducts 119, and the wind generated by the fan assembly 2 located in the receiving cavity 118 in the center part is blown to the two air ducts 119 on both sides. Similar to the first part 110, the third part 112 is also provided with the vertical plate 31, the first horizontal plate 32 and the second horizontal plate 34. The first horizontal plate 32 includes a Soviet baffle 33 that is vertically abutted against the second horizontal plate 34. The difference between the first part 110 and the second part 111 is as follows. Both ends of the baffle 33 in the third portion 112 abut against the first side wall 113, the entire baffle 33 is arranged in an "M" shape surrounding the fan assembly 2, and the baffle 33 and the vertical plate 31 correspond to the two air ducts 119, and two exhaust ports 121 are formed by the baffle 33 and the vertical plate 31.

[0018] As shown in Figures 2, 5, 6 and 7, the third part 112 is provided with a support part 5 facing the rear neck of the human body. The support part 5 is provided with a first notch 51 in the same direction as the air inlet 117 and a second notch 51 in the same direction as the air outlet 120. The arrangement of the first notch 51 and the second notch 52 ensures the intake volume of the air inlet 117 in the second side wall 114. At the same time, wind is sucked into the rear neck area of ​​the human body through the first notch 51 and the second notch 52, thereby achieving the function of absorbing sweat and providing a better use experience.

[0019] As shown in FIG. 8 and FIG. 9, it is a schematic diagram of the second embodiment of the portable fan of the present application. The main differences between the second embodiment and the first embodiment are as follows. In the first part 110 and the second part 111, the first space M is formed between the first horizontal plate 32 and the inner wall of the housing 1, and the negative ion module 4 is disposed in the first space M. The positive electrode emission part 43 and the negative electrode emission part 42 are both accommodated in the first space M, and the housing 1 is formed with the first emission port 123 that communicates the first space M with the outside world. The negative electrode emission part 42 is provided in the first emission port 123. In the first space M, the positive electrode emission part 43 and the negative electrode emission part 42 ionize the space between them to generate negative ions, which are discharged to the outside of the housing 1 through the first emission port 123. The first horizontal plate 32 is provided with the first through hole 321 communicating the air duct 119 and the first space M, and a part of the wind generated by the fan assembly 2 is blown through the first through hole 321 toward the first space M. Alternatively, the first horizontal plate 32 is not provided with the first through hole 321 communicating the air duct 119 and the first space M. As the second embodiment is basically similar to the first embodiment in other configurations and functions, description thereof will be omitted.

[0020] As shown in FIG. 10 and FIG. 11, it is a schematic diagram of the third embodiment of the portable fan of the present application. The main differences between the third embodiment and the first embodiment are as follows. In the first part 110 and the second part 111, the first space M is formed between the first horizontal plate 32 and the inner wall of the housing 1, and the negative electrode emission part 42 is accommodated in the first space M. The first horizontal plate 32 is provided with the first through hole 321 that communicates the air duct 119 and the first space M. The negative electrode emission part 42 is provided corresponding to the first through hole 321. A second space N is formed between the second horizontal plate 34 and the housing 1, and the positive electrode emission part 43 is accommodated in the second space N. The second horizontal plate 34 is provided with the second through hole 341 that communicates the air duct 119 and the second space N, and the positive electrode emission part 43 is provided corresponding to the second through hole 341 of the second space N. The first through hole 321 and the second through hole 341 are disposed with a front-rear offset, and the positive electrode discharge part 43 and the negative electrode discharge part 42 ionize the air between the first through hole 321 and the second through hole 341, i.e., the space in the air duct 119, to generate negative ions, and the generated negative ions are blown out together with the wind of the fan assembly 2. In this embodiment, the housing 1 is provided with the first discharge port 123 communicating the first space M with the outside world, and the negative electrode discharge part 42 is disposed adjacent to the first discharge port 123, so that a part of the wind generated by the fan assembly 2 enters the first space M through the first through hole 321, and a part of the negative ions are blown out from the air outlet 120. In another embodiment, the housing 1 does not need to be provided with the first discharge port 123 communicating the first space M with the outside world, and all the generated negative ions may be directly discharged from the air outlet 120. As for other configurations and functions, the third embodiment is basically similar to the first embodiment, and therefore a description thereof will be omitted here.

[0021] Example 2 As shown in Figures 12 and 13, they are schematic diagrams of the portable fan of the present application. The portable fan includes a housing 1, a fan assembly 2 and a bulkhead assembly 3 housed in the housing 1. In this embodiment, the housing 1 includes a first part 110, a second part 111, and a third part 112 pivotally connecting the first part 110 and the second part 111. The first part 110 and the second part 111 are symmetrically arranged, and the third part 112 is pivotally connected to the first part 110 and the second part 111, respectively, so that by rotating the first part 110 and / or the second part, the opening size of the free end of the portable fan can be changed, and the portable fan can be easily mounted.

[0022] As shown in Figs. 12, 13 and 15, the first part 110, the second part 111 and the third part 112 are provided with an air inlet 117, a receiving cavity 118, an air duct 119 and an air outlet 120 which are sequentially connected to each other, and a fan assembly 2 is installed corresponding to each receiving cavity 118, and the portable fan is divided into three parts, and each part is provided with a fan assembly 2. The wind outflow from each part is uniform, and the wind outflow effect is high. Of course, in other embodiments, the air inlet 117, the receiving cavity 118, the air duct 119 and the air outlet 120 may be provided in any two or any one of the first part 110, the second part 111 and the third part 112.

[0023] 12, 13, and 15, the housing 1 includes a first side wall 113 having the air outlet 120, a second side wall 114 facing the neck of the human body, and a third side wall away from the neck of the human body. The first side wall 113 is connected to the second side wall 114 and the third side wall 115. The housing 1 further includes a fourth side wall 116 facing the first side wall 113 and connecting the second side wall 114 and the third side wall 115.

[0024] 13 and 14, in the first portion 110, the bulkhead assembly 3 includes a vertical plate 31, a first horizontal plate 32, and a second horizontal plate 34. The vertical plate 31, the first horizontal plate 32, the second horizontal plate 34, and an inner wall of the housing 1 jointly form the receiving cavity 118 and the air duct 119. Here, the first horizontal plate 32 includes a baffle 33 extending vertically and abutting against the second horizontal plate 34, and the baffle 33 is located between the receiving cavity 118 and the air duct 119. One end of the baffle 33 abuts against the first side wall 113, and the air outlet 121 is formed between the other end of the baffle 33 and the vertical plate 31, and the wind generated by the fan assembly 2 enters the air duct 119 from the air outlet 121. The exhaust port 120 may be provided in a projection area of ​​the baffle 33 on the first side wall 113 .

[0025] By disposing the baffle 33, the exhaust port 120 is formed smaller, the wind pressure is increased, the wind travel distance is increased, and the air can be blown toward the air outlet 120 farther from the fan assembly 2, and the difference in wind force at each location of the air outlet 120 is reduced. In addition, the air outlet 120 can be installed in the projection area of ​​the baffle 33 on the first side wall 113, and the installation range of the air outlet 120 is wide, the range of air discharge is increased, and there is an effect of relieving pressure, preventing noise caused by blocking of wind and reducing wind noise. The baffle 33 also prevents hair from entering the receiving cavity 118, thereby avoiding the risk of hair getting tangled.

[0026] As shown in FIG. 13 and FIG. 14, in the first portion 110, the first horizontal plate 32 includes a first flat plate portion 321 located in the receiving cavity 118, and a first inclined surface 322, a second inclined surface 323, and a second flat plate portion 324 located in the air duct 119. The second inclined surface 323 is simultaneously connected to the first inclined surface 322 and the second flat plate portion 324. The second inclined surface 323 is adjacent to the air outlet 120, and the baffle 33 is located between the first flat plate portion 321 and the second flat inclined surface 323. The baffle 33 includes a circular arc portion 331 located at a free end, and an end of the circular arc portion 331 is located on the second inclined surface 323. The inner diameter of the circular arc portion 331 is 0.25 mm to 1.25 mm. The arc portion 331 is installed at the end of the free end of the baffle 33, i.e., located at the air outlet 121, and a part of the wind passes through the arc portion 331 to generate the "Coanda effect", and is then blown out from the air outlet 120 of the baffle 33 in the projection area of ​​the first side wall 113, and the wind noise is further reduced by the arc portion 331. Note that, within a certain numerical range, the larger the inner diameter of the arc portion 331, the higher the noise reduction ability of the arc portion 331.

[0027] As shown in Figures 13 and 14, in the first part 110, the wind generated by the fan assembly 2 passes through the exhaust port 121 and enters the first inclined surface 322, and then enters the second flat plate portion 324, so that the cross-sectional area of ​​the air duct 119 is reduced. At the same time, the vertical plate 31 is extended in an arc shape, and in the direction from the exhaust port 121 to the air duct 119, the distance between the vertical plate 31 and the first side wall 113 becomes smaller and smaller until it is maintained at a constant distance, and the cross-sectional area of ​​the air duct 119 is reduced. The cross-sectional area of ​​the air duct 119 is reduced multi-dimensionally, so that the wind pressure is increased, the wind force is strengthened, the wind travel distance is extended, the wind outlet 120 blowing effect is improved, and the user experience is improved.

[0028] As shown in Figs. 12 to 14, the first portion 110 is provided with the air inlets 117 in both the second side wall 114 and the third side wall 115 in correspondence with the fan assembly 2. Referring also to Fig. 15, a negative ion chamber is formed between the first horizontal plate 32 and the second side wall 114, an outlet 122 communicating with the negative ion chamber is provided in the first side wall 113, the negative ion generator 4 is provided in the housing 1, and the outlet end of the negative ion generator 4 faces the outlet 122. The outlet 122 and the air outlet 120 are arranged adjacent to each other. In this embodiment, the first horizontal plate 32 is provided with a through hole 325 communicating with the negative ion chamber, and a part of the wind generated by the fan assembly 2 is blown through the through hole 325 toward the outlet end of the negative ion generator 4, and is finally blown out from the outlet 122. In other embodiments, the first horizontal plate 32 does not need to be provided with the through-hole 325 communicating with the negative ion chamber, and the emission end of the negative ion generator 4 may be disposed close to the emission port 122 or facing the emission port 122. The negative ions emitted from the emission end are directly discharged from the emission port 122.

[0029] As shown in FIG. 13, in the first part 110, a light strip 5 is embedded in the third side wall 115. The light strip 5 extends along the same direction as the third side wall 115. The air inlets 117 of the third side wall 115 are provided on both sides of the light strip 5, and a filter member 6 is provided on the second horizontal plate 34 toward the air inlets 117 of the third side wall 115. The filter member 6 has a plurality of small holes formed therein, and can prevent some impurities from entering the receiving cavity 118 and affecting the performance of the fan assembly 2. The second part 111 is disposed symmetrically to the first part 110 and has basically the same structure, so it will not be described again here.

[0030] As shown in FIG. 16, the third part 112 is provided with the accommodating cavity 118 in the central part, and one air duct 119 is provided on each side of the accommodating cavity 118 of the third part 112. That is, the third part 112 has two air ducts 119, and the wind generated by the fan assembly 2 located in the central accommodating cavity 118 is blown to the two air ducts 119 on both sides. Similar to the first part 110 and the second part 111, the third part 112 includes the vertical plate 31, the first horizontal plate 32, and the second horizontal plate 34. The first horizontal plate 32 includes the baffle 33 that is vertically abutted against the second horizontal plate. The third part 112 is different from the first part 110 and the second part 111 in the following points. Both ends of the baffle 33 in the third portion 112 abut against the first side wall 113, and the entire baffle 33 is arranged in an "M" shape surrounding the fan assembly 2, and the baffle 33 and the vertical plate 31 form the two exhaust ports 121 corresponding to the two air ducts 119.

[0031] As shown in Figs. 16 to 18, in this embodiment, the negative ion generating device 4 is not provided in the third portion 112, and an air intake chamber is formed between the first horizontal plate 32 and the second side wall 114. The third portion 112 is provided with a support portion 7 facing the rear of the neck of the human body, a first notch 71 is provided in the holding portion 7, and a logo portion 123 is provided in the center of the second side wall 114 of the third portion 112. The logo portion 123 is exposed from the first notch 71 to improve the appearance of the product and build a brand image. The air inlet 117 is provided around the logo portion 123 to increase the air intake volume, and a part of the air inlet 117 is exposed from the first notch 71. Specifically, the air inlet 117 close to the fan assembly 2 is blocked by the support 7, and the air inlet 117 far from the fan assembly 2 is exposed from the first notch 71, and the first notch 71 and the air inlet 117 exposed from the first notch 71 absorb wind to the rear neck area of ​​the human body, thereby achieving the function of absorbing sweat, and providing a better use experience. At the same time, referring to Figs. 12 and 15 together, the support 7 is provided with a second notch 72 parallel to the air outlet 120. By providing the first notch 71 and the second notch 72, the inlet volume of the air inlet 117 of the second side wall 114 is ensured. Of course, in other embodiments, the negative ion generator 4 may be installed in the third portion 112, so that the negative ion chamber is formed between the first horizontal plate 32 and the second side wall 114.

[0032] 12 and 16, similarly to the first portion 110 and the second portion 111, the third portion 112 also has a light strip 5 embedded in the third side wall 115. The light strip 5 extends along the same direction as the light strip 5. The air inlets 117 of the third side wall 115 are provided on both sides of the light strip 5. The second horizontal plate 34 is provided with a filter member 6 facing the air inlet 117 of the third side wall 115. The filter member 6 has a plurality of small holes formed therein.

[0033] Example 3 As shown in Figs. 19 to 21, these are schematic diagrams of a portable fan 100 of the present application, and the portable fan 100 includes a housing 1, a support member 2, and a fan assembly 3. The support member 2 is installed on the side of the housing 1 facing the neck of the human body, the support member 2 is rotatably connected to the housing 1 to support the posterior neck region of the human body, and the fan assembly 3 is accommodated in the housing 1. By arranging the support member 2 to support the posterior neck region of the human body, the housing 1 does not hit the person, and the support member 2 can support the housing 1 and the posterior neck of the human body, so that a gap is generated between the housing 1 and the posterior neck of the human body, reducing the contact area between the housing 1 and the posterior neck of the human body, and improving the cooling effect of the portable fan 100.

[0034] As shown in Figs. 19 to 21, the housing 1 includes a first side wall 11 facing the neck of the human body and a second side wall 12 facing the side opposite to the neck of the human body, and a first fitting portion 18 is protruded from the first side wall 11. Correspondingly, the support member 2 is provided with the second fitting portion 21. The second fitting portion 21 is rotatably connected to the first fitting portion 18. The support member 2 is rotatable with respect to the first side wall 11.

[0035] As shown in Figs. 21 to 23, in this embodiment, the first fitting portion 18 includes two pivot joints 181 and an elastic arm 182 located between the two pivot joints 181, and a protrusion 183 is provided at a free end of the elastic arm 182. The second fitting portion 21 includes a pivot column 211. A surface of the pivot column 211 is provided with a plurality of grooves 212. Both ends of the pivot column 211 are rotatably connected to the two pivot joints 181. When the support member 2 rotates, the protrusions 183 are accommodated in different grooves 212, so that the support member 2 is positioned at different angles when it rotates up and down.

[0036] As shown in Figs. 19 to 21, the housing 1 includes two clamp arms 13 arranged symmetrically. The two clamp arms 13 are rotatably connected via a rotating connector 4. The pivot angle range of each clamp arm 13 is ±10°. The two clamp arms 13 are rotatably connected, allowing the user to adjust the distance between the free ends of the two clamp arms 13, thereby facilitating installation and fixing. Each clamp arm 13 is formed with an air inlet 14, a housing cavity 15, an air duct 16 and an air outlet 17, which are sequentially communicated. The fan assembly 3 is housed in the housing cavity 15 and is used to blow air from the air inlet 14 through the air duct 16 and out of the air outlet 17.

[0037] 19 to 21, the portable fan 100 is provided with two support members 2 corresponding to the two clamp arms 13. When the two clamp arms 13 pivot, the positions of the two support members 2 in contact with the human body also change; however, because the support members 2 and the clamp arms 13 are rotatably connected, the two support members 2 can each be adjusted to fit the human neck, improving wearing comfort.

[0038] As shown in Figs. 19 to 21, each of the clamp arms 13 is provided with a first air inlet 141 located on the first side wall 11 and a second air inlet 142 located on the second side wall 12 corresponding to each of the fan assemblies 3. The receiving cavity 15 is located at one end where the two clamp arms 13 are connected, and the support member 2 is disposed corresponding to the receiving cavity 15. There is a gap between at least a part of the support member 2 and the first air inlet 141. Therefore, when the portable fan 100 is used, the support member 2 does not affect normal intake of air from the first air inlet 141. Furthermore, referring to Fig. 23, the support member 2 is formed with a through hole 22 corresponding to the first air inlet 141, so that sweat generated by contact between the support member 2 and a person's neck is quickly absorbed and volatilized, making the user's neck dry and refreshed, improving the wearing comfort.

[0039] As shown in FIG. 20 and FIG. 24, the second side wall 12 includes a main wall 121 and an auxiliary wall 122. The main wall 121 and the auxiliary wall 122 are arranged in a stepped manner, and the second air inlet 142 is formed between the main wall 121 and the auxiliary wall 122. The second air inlet 142 is hidden between the main wall 121 and the auxiliary wall 122, which has a beautiful appearance and makes it difficult for the user's hair to enter the second air inlet 142, and the safety of the product is superior. The main wall 121 is longer than the auxiliary wall 122. When the portable fan 100 is attached to a human body, the main wall 121 is located above the auxiliary wall 122, and the auxiliary wall 122 is located radially inward of the main wall 122. This allows the second air inlet 142 provided on the second side wall 12 opposite the neck of the human body to be better hidden, and the mouth of the second air inlet 142 is set downward, making it difficult for the user's hair to enter. A cover plate having a through hole is provided between the second air inlet 142 and the fan assembly 3, which further prevents the user's hair from being sucked into the fan assembly 3.

[0040] As shown in Fig. 21 and Fig. 24, the rotating connector 4 includes a first connector 41 and a second connector 42. The first connector 41 is fixedly connected to one of the clamp arms 13, and the second connector 42 is fixedly connected to the other of the clamp arms 13. The first connector 41 includes a first fixing portion 411, and the second connector 42 includes a second fixing portion 421, and the first fixing portion 411 and the second fixing portion 421 are rotatably connected. The first fixing portion 411 and the second fixing portion 421 are both spindle-shaped, and when the two clamp arms 13 rotate, they rotate along the spindle-shaped first fixing portion 411 and the second fixing portion 421, making it more beautiful.

[0041] As shown in Figures 21, 24 and 25, the housing 1 also includes a bulkhead assembly 5. The bulkhead assembly 5 separates the communicating accommodating cavity 15 and the air duct 16 from other spaces in the housing 1. The width of the end of the air duct 16 away from the accommodating cavity 15 is smaller than the width of the end of the air duct 16 close to the accommodating cavity 15 to ensure space for accommodating the battery 6. In this embodiment, the two clamp arms 13 each accommodate the battery 6, and the two fan assemblies 3 can operate simultaneously or independently. The air outlet 17 is formed through the side of the air duct 16 and extends to essentially cover the entire air duct 16. The width of the end of the air duct 16 away from the accommodating cavity 15 is narrower, which makes it easier to collect wind, and therefore the wind discharge from each part of the air outlet 17 is more uniform.

[0042] As shown in FIG. 26, it is a schematic diagram of the portable fan 100 of the present application. The main differences are as follows. The second fitting 21 includes a mounting bracket 213, the first fitting 18 includes a fixing member 184 fixed to the first side wall 11, and a rotating ball 185 penetrating the mounting bracket 213 and fixed to the fixing member 184, and the mounting bracket 213 rotates relative to the rotating ball 185, so that the support member 2 rotates relative to the rotating ball 185. The support member 2 can rotate up and down, whereas in this embodiment, the support member 2 can rotate spherically, which is more comfortable to wear. Other structures and functions are basically the same, so they will not be described again here.

[0043] As shown in FIG. 27 and FIG. 28, it is a schematic diagram of the portable fan 100 of the present application. The main difference is that the shape of the mounting bracket 213 matches the shape of the second fitting part 21. In the rotating connector 4, the first fixing part 411 includes a plurality of first pieces 412, the second fixing part 421 includes a plurality of second pieces 422, and the plurality of first pieces 412 and the plurality of second pieces 422 are crossed and stacked. This greatly increases the friction between the first fixing part 411 and the second fixing part 421, and when the two clamp arms 13 rotate, they can rotate and stop at any time, and have better safety performance. Other structures and performances are basically the same, so they will not be described again here.

[0044] In addition to the above embodiment, it should be understood that in other embodiments, the support member 2 and the housing 1 may be connected via a bendable molding member, through which the support member 2 can be better fitted to the back of the neck of the human body.

[0045] Example 4 As shown in Figs. 29 to 32, these are schematic diagrams of the portable fan of the present application. The portable fan includes a housing 1, a support member 2, a pad 3, and a fan assembly 4. The housing 1 is worn on the neck of a human body, and the housing 1 is formed with an air inlet 14, a storage cavity 15, an air duct 16, and an air outlet 17, which are sequentially connected. The housing 1 has a "C" shape, the housing 1 has a posterior neck portion located in the center, and the storage cavity 15 is provided at the posterior neck portion. A mounting portion 18 is provided facing the posterior neck portion of the human body in correspondence with the position of the storage cavity 15. The support member 2 is attached to the mounting portion 18 and is used to support the posterior neck region of the human body. The pad 3 is disposed on the mounting portion 18 and abuts against the support member 2. The pad 3 has elastic deformation ability. The fan assembly 4 is housed in the storage cavity 15 and is used to blow air from the air inlet 14 through the air duct 16 to the air outlet 17.

[0046] By arranging the support member 2 to support the rear neck region of the human body, direct collision between the housing of the portable fan and the rear neck of the human body is avoided. The support member 2 also separates the housing 1 and the rear neck of the human body to form a gap between the housing 1 and the rear neck of the human body, thereby reducing the contact area between the housing 1 and the rear neck of the human body and improving the cooling effect of the portable fan. The pad 3 is provided on the mounting part 18 to abut against the support member 2. The pad 3 has elastic deformation ability, which makes the support member 2 more flexible and can flexibly fit the necks of different users.

[0047] As shown in FIG. 30 to FIG. 33, the housing 1 includes a first side wall 11 facing the person's neck and a second side wall 12 facing the opposite side of the person's neck. The first side wall 11 is provided with the mounting portion 18. The support member 2 includes a contact portion 21 and a connecting member 22. The surface of the contact portion 21 is formed in an arc shape so as to easily fit the person's neck. The connecting member 22 includes a first blending portion 221 that blends with the contact portion 21 and a second blending portion 222 that blends with the mounting portion 18. The number of the second blending portions 222 is two, and when the two second blending portions 222 are pressed, the two second blending portions 222 approach each other and advance into or leave the mounting portion 18. When the two second blending portions 222 are loosened, the second blending portion 222 is fixed to the mounting portion 18 or detached from the mounting portion 18.

[0048] As shown in FIG. 31 to FIG. 33, the attachment portion 18 has an attachment chamber 181, the second blending portion 222 has a hook portion 223 that enters the attachment chamber 181 and hooks the attachment chamber 181, and the pad 3 is abutted against the hook portion. The height of both the hook portion 223 and the pad 3 is equal to or greater than the height of the attachment chamber 181 so that the support member 2 does not loosen or shake. The pad 3 has elastic deformation ability, and in this embodiment, the pad 3 is a silicone material, and the compression amount of the pad 3 is 15 to 25%, which makes the support member 2 more flexible and can better fit the neck of different users. Of course, in other embodiments, the pad 3 may be other materials having elastic deformation ability. There is a gap between the surface of the first blending portion 221 facing the attachment portion 18 and the attachment portion 18, and the support member 2 can flexibly rotate in various directions. Furthermore, since an attachment tool can be used in the gap, the support member 2 can be easily attached.

[0049] In this embodiment, the material of the support member 2 is also a silicone material, and the characteristics of the silicone material allow the support member 2 to be deformed, so that the support member 2 can better fit the neck of the user. In addition, the silicone material is more comfortable to wear and provides a better user experience.

[0050] As shown in Figures 29 to 31, the housing 1 includes two symmetrically arranged clamp arms 13, which are rotatably connected via a rotary connector 722, and each clamp arm 13 has a rotation angle range of ±10°. The two clamp arms 13 are rotatably connected, allowing a user to adjust the distance between the free ends of the two clamp arms 13, thereby facilitating installation and fixing. Each clamp arm 13 is formed with the air inlet 14, the accommodation cavity 15, the air duct 16, and the air outlet 17, which are communicated with each other, and the two accommodation cavities 15 are located close to each other at the rear neck portion.

[0051] 31 and 33, the portable fan is provided with two support members 2 corresponding to the two clamp arms 13. When the two clamp arms 13 rotate, the positions of the two support members 2 in contact with the human body also change accordingly, but since the pads 3 are provided in the attachment chambers 181 so as to abut against the support members 2, the two support members 2 can fit around the human neck, thereby improving the wearing comfort.

[0052] As shown in Figs. 30 to 32, each of the clamp arms 13 is provided with a first air inlet 141 located on the first side wall 11 and a first air inlet 142 located on the second side wall 12 corresponding to each of the fan assemblies 4. The receiving cavity 15 is located at one end where the two clamp arms 13 are connected, the support member 2 is disposed corresponding to the receiving cavity 15, and a gap exists between at least a part of the support member 2 and the first air inlet 141. Therefore, when the portable fan is used, the support member 2 does not affect normal intake of air from the first air inlet 141. Also, referring to the figures, the contact portion 21 of the support member 2 is formed with a through hole 211 corresponding to the first air inlet 141, thereby quickly absorbing and evaporating sweat generated by contact between the contact portion 21 and a person's neck, thereby keeping the user's neck dry and fresh and improving the wearing comfort.

[0053] As shown in Fig. 30 to Fig. 32, the second side wall 12 includes the main wall 121 and the auxiliary wall 122. The main wall 121 and the auxiliary wall 122 are arranged in a stepped shape. The second air inlet 142 is formed between the main wall 121 and the auxiliary wall 122. The second air inlet 142 is hidden between the main wall 121 and the auxiliary wall 122, which has a beautiful appearance, the user's hair is less likely to enter the second air inlet 142, and the safety of the product is superior.

[0054] As shown in FIG. 31 and FIG. 34, the housing 1 also includes a bulkhead assembly 5. The bulkhead assembly 5 separates the communicating accommodating cavity 15 and the air duct 16 from other spaces in the housing 1. The width of the end of the air duct 16 away from the accommodating cavity 15 is smaller than the width of the end of the air duct 16 close to the accommodating cavity 15 to ensure space for accommodating the battery 6. In this embodiment, the two clamp arms 13 each accommodate the battery 6, and the two fan assemblies 4 can operate simultaneously or independently. The air outlet 17 is formed through the side of the air duct 16 and extends to essentially cover the entire air duct 16. The width of the end of the air duct 16 away from the accommodating cavity 15 is narrower, which makes it easier to collect wind and allows the wind to be discharged more uniformly from each part of the air outlet 17.

[0055] Example 5 35 to 37, the first embodiment of the present application provides a fan drive circuit. The fan drive circuit can be used for multiple types of fans. Specifically, the fan drive circuit includes a main control circuit 11, a three-phase drive circuit 12, and a back electromotive force detection circuit 14.

[0056] The three-phase drive circuit 12 includes at least three signal input terminals 121 and three drive signal output terminals 122. The at least three signal input terminals 121 are electrically connected to the main control circuit 11, respectively, and receive control signals. The three drive signal output terminals 122 are electrically connected to three signal terminals (U, V, W) of the DC brushless fan motor, respectively, and output three-phase drive signals for driving and rotating the DC brushless fan motor. The back electromotive force detection circuit 14 includes three detection branches 141. Each detection branch 141 includes a detection terminal 1411 and a detection output terminal 1412 electrically connected to the detection terminal. The three detection terminals 1411 of the three detection branches 141 are electrically connected to the three drive signal output terminals 122, respectively. The three detection output terminals 1412 of the three detection branches 141 are respectively electrically connected to the main control circuit 11 and used to output a first detection signal, a second detection signal and a third detection signal to the main control circuit 11, so that the main control circuit 11 obtains the phase of the three-phase driving signal according to the first detection signal, the second detection signal and the third detection signal, and adjusts the control signal.

[0057] 37, the detection branch 141 includes a first detection resistor R1, a second detection resistor R2, and a third detection resistor R3, and the first detection resistor R1 and the second detection resistor R1 are connected in series. One end of the first detection resistor R1 remote from the second detection resistor R1 is the detection terminal 1411, one end of the second detection resistor R2 remote from the first detection resistor R1 is grounded, and a node between the first detection resistor R1 and the second detection resistor R2 is the detection output terminal 1412.

[0058] The three-phase drive circuit 12 can improve the energy saving performance and control performance of the fan motor, and can extend the life of the fan drive circuit and the fan. In addition, the back electromotive force detection circuit 14 allows the main control circuit 11 to easily obtain the phase of the DC brushless fan motor, and send a corresponding control signal to the three-phase drive circuit 12 to effectively control the drive of the DC brushless fan motor, and improve the reliability and stability of the drive.

[0059] 36, the three-phase drive circuit 12 includes a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, an eighth transistor Q8, and a ninth transistor Q9. First conduction terminals 1211 of the first transistor Q1, the second transistor Q2, and the third transistor Q3 are all connected to a power supply terminal 1212. A first conductive terminal 1211 of the fourth transistor Q4 is connected to the power supply terminal 1212, a first conductive terminal 1211 of the fifth transistor Q5 is connected to the power supply terminal 1212, a first conductive terminal 1211 of the sixth transistor Q6 is connected to the power supply terminal 1212, control terminals of the fourth transistor Q4, the fifth transistor Q5 and the sixth transistor Q6 are electrically connected to the main control circuit 11 respectively, and control terminals of the seventh transistor Q7, the eighth transistor Q8 and the seventh transistor Q9 are electrically connected to the control terminals of the fourth transistor Q4, the fifth transistor Q5 and the sixth transistor Q6 respectively, and are used for receiving control signals. The second conductive terminals 1213 of the fourth transistor Q4, the fifth transistor Q5 and the sixth transistor Q6 are all grounded, the first conductive terminal 1211 of the seventh transistor Q7 is connected to the second conductive terminal of the first transistor Q1, the second conductive terminal 1213 of the seventh transistor Q7 is grounded, the first conductive terminal 1211 of the eighth transistor Q8 is connected to the second conductive terminal 1213 of the second transistor Q2, the second conductive terminal 1213 of the transistor Q8 is grounded, the first conductive terminal 1211 of the ninth transistor Q9 is connected to the second conductive terminal 1213 of the third transistor Q3, and the second conductive terminal 1213 of the ninth transistor Q9 is grounded.The node between the first conduction terminal 1211 of the seventh transistor Q7 and the second conduction terminal 1213 of the first transistor Q1, the node between the first conduction terminal 1211 of the eighth transistor Q8 and the second conduction terminal 1213 of the second transistor Q2, and the node between the first conduction terminal 1211 of the ninth transistor Q9 and the second conduction terminal 1213 of the third transistor Q3 respectively function as the three driving signal output terminals 122, and the at least three signal input terminals 121 are three PWM signal input terminals, and the control signal includes three PWM signals.

[0060] As shown in FIG. 36, the fan driving circuit also includes a current detection circuit 15. The second conductive terminals 1213 of the seventh transistor Q7, the eighth transistor Q8, and the ninth transistor Q9 are all grounded through the current detection circuit 15, and the current detection circuit 15 is also electrically connected to the main control circuit 11. The current detection circuit 15 includes a sense resistor 151 and a sense capacitor 152. The second conductive terminals 1213 of the seventh transistor Q7, the eighth transistor Q8, and the ninth transistor Q9 are grounded through the sense resistor 151 and the sense capacitor 152 in sequence, and the node of the sense resistor 151 and the sense capacitor 152 is electrically connected to the main control circuit 11. When the abnormal current occurs due to the current detection circuit 15, the main control circuit 11 controls the fan driving circuit 10 to stop operating or to operate at a lower power, thereby providing overcurrent protection for the fan driving circuit 10 and improving the reliability and service life of the fan driving circuit.

[0061] 38 and 40, the fan driving circuit includes the interface circuit 16 and the charge management circuit 17. The interface circuit 16 is used to electrically connect an external power source to receive an external voltage. The charge management circuit 17 is electrically connected between the interface circuit 16 and a battery VBAT, and is used to receive the external voltage and charge the battery VBAT or output a supply voltage. The fan driving circuit includes a button 31. One end of the button 31 is connected to the main control circuit 11, and the other end is grounded. The fan driving circuit also includes an indicator light branch 19. The indicator light branch 19 includes a light-emitting diode and a resistor connected in series. The positive pole of the light-emitting diode is used to electrically connect with the main control circuit 11. The negative pole of the light-emitting diode is grounded.

[0062] Specifically, in this embodiment, the fan drive circuit can be applied to a neck-hanging fan, but is not limited to the neck-hanging fan, and can also be applied to portable fans such as table fans, stand-up fans, hand-held fans, clip fans, folding fans, etc. The two DC brushless fan motors are disposed on the left and right sides of the neck-hanging fan, respectively, and are used to rotate and drive the fan blades on the left and right sides of the neck-hanging fan.

[0063] As shown in FIG. 35, FIG. 36 and FIG. 39, the main control circuit 11 may include a main control chip 111 and an auxiliary chip 113. The main control circuit 11 includes a main control chip 111 and an auxiliary chip 113. The three-phase driving circuit 12, the back electromotive force detection circuit 14 and the DC brushless fan motor are two in number, and are installed in one-to-one correspondence. The main control chip 111 is electrically connected to one of the three-phase driving circuits 12, thereby outputting a control signal to one of the three-phase driving circuits 12 to drive the corresponding one of the DC brushless fan motors, and the back electromotive force detection circuit 14 is electrically connected to the corresponding one of the three-phase driving circuits 12, thereby outputting the corresponding first detection signal, the second detection signal and the third detection signal to the main control chip 111, thereby the main control chip 111 obtains the phase of the three-phase driving signal of one of the three-phase driving circuits 12, and adjusts the control signal output to one of the three-phase driving circuits 12. The auxiliary chip 113 is electrically connected to the other three-phase drive circuit 12, thereby outputting a control signal to the other three-phase drive circuit 12 to drive the corresponding other DC brushless fan motor, and the other back EMF detection circuit 14 is electrically connected to the corresponding three-phase drive circuit 12, thereby outputting the corresponding first detection signal, the second detection signal and the third detection signal to the auxiliary chip 113, thereby the auxiliary chip 113 obtains the phase of the three-phase drive signal of the other three-phase drive circuit 12 and adjusts the control signal output to the other three-phase drive circuit 12.

[0064] In this embodiment, the main control chip 111, the corresponding three-phase driving circuit 12, and the corresponding back electromotive force detection circuit 14 can be arranged in one module (e.g., a first circuit board) and arranged on the same side of the neck fan as the corresponding DC brushless fan motor. The auxiliary chip 113, the corresponding three-phase driving circuit 12, and the corresponding back electromotive force detection circuit 14 can be arranged in a different module (e.g., a second circuit board independent of the first circuit board) and arranged on the other side of the neck fan as the corresponding DC brushless fan motor. It can be seen that the above design improves rationality and compactness, and also improves the reliability of connection and operation. However, the layout of the three-phase driving circuit 12, the back EMF detection circuit 14, the main control chip 111, and the auxiliary chip 113 may be various. For example, the above-mentioned three-phase driving circuit 12, the back EMF detection circuit 14, the main control chip 111, and the auxiliary chip 113 may all be arranged on the same substrate, or the three-phase driving circuit 12 and the back EMF detection circuit 14 may be arranged on one substrate, and the main control chip 111 and the auxiliary chip 113 may be arranged on different substrates. This can be specifically selected according to actual needs, and will not be described here.

[0065] 41 and 42, the fan driving circuit includes a speed adjusting interface circuit 26 having the first connector 261 and the second connector 262. The first and second pins of the first connector 261 are electrically connected to the main control chip 111, respectively, and the third pin of the first connector 261 is grounded. The first pin of the second connector 262 is connected to a battery VBAT through a first connecting resistor on the one hand, and is connected to the auxiliary chip 113 through a second connecting resistor on the other hand, the second pin of the second connector 262 is connected to the auxiliary chip 113 through a third connecting resistor, and the third pin of the second connector 262 is grounded. In addition, each pin of the first connector 261 and the second connector 262 can also be electrically connected one by one, so that the rotation speeds of the two DC brushless fan motors can be synchronously adjusted.

[0066] 43 to 48, a second embodiment of the present application provides a fan drive circuit. Description of the same parts of the fan drive circuit as those of the first embodiment will be omitted. Below, differences between the fan drive circuit of the second embodiment and the fan drive circuit of the first embodiment will be mainly described. First, the main control circuit 11 of the second embodiment is different from the main control circuit 11 of the first embodiment, and the main control circuit 11 of the second embodiment may mainly include a main control chip 111.

[0067] 44, in the second embodiment, the three-phase drive circuit 12 includes a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, and a sixth transistor Q6. A first conduction terminal 1211 of the first transistor Q1, the second transistor Q2, and the third transistor Q3 is connected to a power supply terminal 1212, a first conduction terminal 1211 of the fourth transistor Q4 is connected to a second conduction terminal 1213 of the first transistor Q1, a first conduction terminal 1211 of the fifth transistor Q5 is connected to a second conduction terminal 1213 of the second transistor Q2, a first conduction terminal 1211 of the sixth transistor Q6 is connected to a second conduction terminal 1213 of the third transistor Q3, a node between the first conduction terminal 1211 of the fourth transistor Q4 and the second conduction terminal 1213 of the first transistor Q1, The node between the first conduction terminal 1211 of the fifth transistor Q5 and the second conduction terminal 1213 of the second transistor Q2, and the node between the first conduction terminal 1211 of the sixth transistor Q6 and the second conduction terminal 1213 of the third transistor Q3 are respectively used as the three driving signal output terminals 122, and the control terminals of the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5 and the sixth transistor Q6 are respectively electrically connected to the main control circuit 11 and used to receive the control signals, and the control signals include six PWM signals.

[0068] As shown in FIG. 44, the following are basically the same as in the first embodiment. The second conductive terminal 1213 of the sixth transistor Q6 is grounded through the current detection circuit 15, which is also electrically connected to the main control circuit 11, and the current detection circuit 15 includes a sense resistor 151 and a sense capacitor 152. The second conductive end 1213 of the sixth transistor Q6 is grounded through the sense resistor 151. The sense capacitor 152 is connected in parallel with the sense resistor 151, and a node between the sense resistor 151 and the second conductive end 1213 of the sixth transistor Q6 is electrically connected to the main control circuit 11. The current detection circuit 15 also includes a first series resistor 153, a second series resistor 154, and a parallel resistor 155. The parallel resistor 155 is connected in parallel with the sense resistor 151. The first series resistor 153 is connected between one end of the sense capacitor 152 and one end of the sense resistor 151, and the second series resistor 154 is connected between the other end of the sense capacitor 152 and the other end of the sense resistor 151. Through the current detection circuit 15, when an abnormal current occurs, the main control circuit 11 controls the fan drive circuit to stop operating or to operate at a lower power, thereby providing overcurrent protection for the fan drive circuit and improving the reliability and service life of the fan drive circuit.

[0069] As shown in FIG. 45, the back electromotive force detection circuit 14 of the second embodiment is basically similar to the back electromotive force detection circuit 14 of the first embodiment, and therefore a description thereof will be omitted here.

[0070] As shown in FIG. 46, the fan driving circuit also includes a transistor temperature detection circuit 24. The transistor temperature detection circuit 24 can be disposed adjacent to each transistor of the three-phase driving circuit 12, and includes a first voltage dividing resistor 241 and a thermistor 242 connected in series. The thermistor 242 is used to sense the temperature of each transistor of the three-phase driving circuit 12, and a node between the first voltage dividing resistor 241 and the thermistor 242 is electrically connected to the main control circuit 11 and used to output a temperature signal, so that the main control circuit 11 controls whether the fan driving circuit enters a temperature protection state according to the temperature signal, the thermistor 242 is connected between the first voltage dividing resistor 241 and ground, and the transistor temperature detection circuit 24 includes a voltage stabilizing capacitor 243 connected in parallel with the thermistor 242. The main control circuit 11 can know whether the temperature of each transistor of the three-phase drive circuit 12 is abnormal through the transistor temperature detection circuit 24, and when an abnormality occurs, the main control circuit 11 stops the operation of the fan drive circuit or controls it to operate at a lower power, thereby providing overcurrent protection for the fan drive circuit and improving the reliability and service life of the fan drive circuit.

[0071] As shown in Fig. 47, the fan drive circuit includes a battery voltage detection circuit 25 electrically connected between the positive electrode of a battery VBAT and ground, and the output terminal of the battery voltage detection circuit 25 is electrically connected to the main control circuit 11. Through the battery voltage detection circuit 25, the main control circuit 11 can know whether the battery voltage is normal, and if the battery voltage is abnormal, it stops the operation of the fan drive circuit or controls it to operate at a lower power, providing overcurrent protection for the fan drive circuit and improving the reliability and service life of the fan drive circuit.

[0072] Specifically, the battery voltage detection circuit 25 includes a second voltage dividing resistor 251 and a third voltage dividing resistor 252 connected in series, and a node between the second voltage dividing resistor 251 and the third voltage dividing resistor 252 is electrically connected to the main control circuit 11. It can be seen that the above-mentioned battery voltage detection circuit 25 has a simple configuration, high reliability, and low cost.

[0073] 48, the fan driving circuit of the second embodiment of the present application also has a burn interface 28, which is used to burn a control program to the main control circuit 11. The write burn interface 28 may be an SWD write burn interface, and is not limited to the above.

[0074] 49 to 50, a third embodiment of the present application provides a fan drive circuit. The fan drive circuit of the third embodiment will not be described again in terms of the same parts as those of the fan drive circuit of the second embodiment. Hereinafter, differences between the fan drive circuit of the third embodiment and the fan drive circuit of the second embodiment will be described.

[0075] As shown in Figures 49 to 51, the three-phase drive circuit 12 of the third embodiment is basically the same as the three-phase drive circuit 12 of the second embodiment. The main control circuit 11 of the third embodiment is different from the main control circuit 11 of the second embodiment in that the main control circuit 11 includes a main control chip 111 and three three-phase control chips 112. Each of the three-phase control chips 112 is electrically connected to the main control chip 111 and the three-phase drive circuit 12.

[0076] As shown in FIG. 50 and FIG. 52, the fan drive circuit also includes a filter capacitor 253 and a sampling resistor 254 connected in series. The sampling resistor 254 is connected between the filter capacitor 253 and ground. A node between the filter capacitor 253 and the sampling resistor 254 is electrically connected to the main control circuit 11. Furthermore, the fan drive circuit also includes a signal amplifier circuit 29. An input end of the signal amplifier circuit 29 is connected to a node between the filter capacitor 253 and the sampling resistor 254. The signal amplifier circuit 29 is used to amplify a signal sampled by the sampling resistor 254 (i.e., a signal at a node between the filter capacitor 253 and the sampling resistor 254) and provide the amplified signal to the main control circuit 11. Thereby, when an abnormality occurs in the entire fan drive circuit, the main control circuit 11 of the fan drive circuit can sensitively detect an abnormal signal of voltage or current, and further, the main control circuit 11 can perform an abnormality protection operation such as stopping operation or reducing the fan rotation speed, thereby improving the safety of use of the fan drive circuit.

[0077] As shown in FIG. 53, the transistor temperature detection circuit 24 of the third embodiment is basically the same as that of the second embodiment, and therefore a description thereof will be omitted here.

[0078] Referring to Fig. 54, Fig. 54 is a schematic configuration diagram of a lighting control circuit 30 of a fan driving circuit provided in the third embodiment of the present application. The lighting control circuit 30 includes a light emitting element 301 and a control switch 302. The positive electrode of the light emitting element 301 receives a driving voltage, and the negative electrode of the light emitting element 301 is grounded through a resistor and two conductive terminals of the control switch 302. The control terminal of the control switch 302 is electrically connected to the main control circuit 11, so that the main control circuit 11 outputs a lighting control signal to the control terminal of the control switch 302 to control the light emission of the light emitting element 301.

[0079] As shown in FIG. 55, the fan driving circuit also includes the Hall detection circuit 23. The Hall detection circuit 23 is electrically connected to the main control circuit 11 and is used to detect the magnetic field generated by the DC brushless fan motor and output a Hall detection signal to the main control circuit 11. Thus, the main control circuit 11 can obtain the rotor position of the DC brushless fan motor based on the Hall detection signal and provide a corresponding control signal to control the operation of the three-phase driving circuit 12. In this case, the fan using the fan driving circuit has a short start-up time and no start-up jitter, which can achieve a better user experience.

[0080] As shown in Fig. 55, the Hall detection circuit 23 also includes a motor temperature detection element 232 connected between a Hall element 231 of the Hall detection circuit 23 and the main control circuit 11. The motor temperature detection element 232 may be a sampling resistor, and the main control circuit 11 knows whether the temperature of the DC brushless fan motor is abnormal through the motor temperature detection element 232, and controls the fan drive circuit to stop operating or operate at a lower power when an abnormality occurs, thereby providing overcurrent protection for the fan drive circuit and improving the reliability and service life of the fan drive circuit.

[0081] As shown in Figures 51 and 56, the fan driving circuit also includes a voltage conversion circuit 20. The voltage conversion circuit 20 is used to receive a battery voltage (VB+), convert the battery voltage into a driving voltage (such as 15V), and supply the driving voltage to the power terminals of the three three-phase control chips 112. The main control chip 111 is used to output a main control signal to the three three-phase control chips 112. Thus, the three three-phase control chips 112 each output a control signal to the three-phase driving circuit 12.

[0082] The fan driving circuit also includes a switch control circuit 21. The switch control circuit 21 is electrically connected to a battery VBAT, the voltage conversion circuit 20 and the main control circuit 11, and is used to control the operation of the voltage conversion circuit 20. The switch control circuit 21 includes a button 211, a first switch tube 212, a second switch tube 213 and a third switch tube 214. Two conductive terminals of the first switch tube 212 are respectively connected to the positive pole of a battery VBAT and the input terminal of the voltage conversion circuit 20. The control terminal of the first switch tube 212 is grounded through the two conductive terminals of the third switch tube 214, the positive electrode of the battery VBAT is connected to the control terminal of the third switch tube 214 through the two conductive terminals of the first switch tube 212 and a unidirectional diode 215, the control terminal of the second switch tube 213 is grounded through the button 211, the control terminal of the third switch tube 214 is electrically connected to the main control circuit 11, and the node between the second switch tube 213 and the unidirectional diode 215 is electrically connected to the switch signal terminal of the main control circuit 11.

[0083] When the button 211 is pressed and turned on, the second switch tube 213 is turned on, the third switch tube 214 is turned on, and the node between the second switch tube 213 and the unidirectional diode 215 outputs a first switch signal (ON) to the switch signal terminal of the main control circuit 11, and the first switch tube 212 is turned on, so that the battery voltage of the battery VBAT is supplied to the voltage conversion circuit 20. When the button 211 is released, the second switch 213 is turned off, and the main control circuit 11 outputs a power supply open signal to the control terminal of the third switch tube 214 in response to the first switch signal to maintain the conduction of the third switch tube 214, and the battery voltage of the battery VBAT is supplied to the voltage conversion circuit 20.

[0084] Furthermore, when the battery voltage of the battery VBAT is supplied to the voltage conversion circuit 20, if the button 211 is pressed again to be turned on, the node between the second switch tube 213 and the unidirectional node 215 outputs a second switch signal (OFF) to the switch signal terminal of the main control circuit 11, and the main control circuit 11 outputs a power supply cut-off signal according to the second switch signal to the control terminal of the third switch tube 214, controls the third switch tube 214 to be turned off, and the battery voltage of the battery VBAT cannot be supplied to the voltage conversion circuit 20 until the first switch tube 212 is turned off and the button 211 is pressed again to be turned on.

[0085] The button 211, the first switch 212, the second switch 213 and the third switch 214 cooperate with the main control circuit 11 to control whether or not the battery voltage of the battery VBAT is supplied to the voltage conversion circuit 20, which has the advantages of not only simple control logic but also high reliability.

[0086] As shown in Figure 57, the fan drive circuit also includes a DC conversion circuit 22. The DC conversion circuit 22 is used to receive the drive voltage (such as a 15V DC voltage) and convert it to other DC operating voltages, such as 3.3V and 5V DC operating voltages.

[0087] Referring to Fig. 58, an embodiment of the present application provides a portable fan 2. The portable fan 2 includes a fan drive circuit 3, a DC brushless fan motor 4, and a fan blade 5 driven by the DC brushless fan motor. The fan drive circuit 3 employs the fan drive circuit described in each of the above embodiments.

[0088] Compared with the prior art, in the fan drive circuit and portable fan 2 of the above embodiment, by using a main control circuit 11, a three-phase drive circuit 12, a back electromotive force detection circuit 14 and a DC brushless fan motor, the energy saving performance and control performance of the fan motor are improved, and not only the reliability of the fan drive circuit and the portable fan 2 is improved, but also the life of the fan drive circuit and the portable fan 2 is extended. In addition, by using a DC brushless fan motor, the structure of the portable fan 2 is simplified and miniaturized, thereby improving the market competitiveness of the product.

[0089] Example 6 59 and 60, the portable fan of the present application includes a housing 1, an axial tube 11 arranged in the housing 1, a rotating shaft 12 arranged in an axial hole of the axial tube 11 and rotatable relative to the axial tube 11, a stator fitted to the outside of the axial tube 11, and an impeller 2 connected to an upper part of the rotating shaft 12. In this embodiment, the structure will be described by taking the portable fan as an example. The portable fan can also be applied to devices such as a desktop fan, a handheld fan, and a baby stroller fan.

[0090] The housing 1 is surrounded to form a mounting channel 31 having an opening at one end. The mounting channel 31 is used to disassemble and assemble the impeller 2. The impeller 2 can be removed from the mounting channel 31 for cleaning. A disassembly member 4 is provided at the opening of the housing 1. The disassembly member 4 is detachably connected to the housing 1. Since there is no circlip at the end 12 of the rotating shaft, when the impeller 2 rotates, the impeller 2 floats up and down, and the impeller 2 collides with the disassembly member 4 to generate noise, and a collision prevention element 21 is provided on the bottom surface of the disassembly member 4 facing the impeller 2, thereby preventing the impeller 2 from colliding with the disassembly member 4 to generate noise.

[0091] In the prior art, a circlip is usually provided at the end of the rotating shaft 12. The circlip is intended to prevent the rotating shaft from coming off the shaft tube, but in the present application, no circlip is provided at the end of the rotating shaft 12, and there is a possibility that the rotating shaft 12 will fall off the shaft tube 11 during use or when the product is moved, causing the impeller 2 to move, so a collision prevention element 21 is provided on the disassembly member 4 at a position corresponding to the impeller 2. The collision prevention element 21 is used in place of a circlip to prevent the impeller 2 from falling off.

[0092] The disassembly member 4 and the housing 1 can be disassembled by rotating or snapping.

[0093] A collision prevention groove 20 is formed in the center of the bottom surface of the disassembly member 4 facing the impeller 2, and a collision prevention element 21 is provided on the bottom surface of the disassembly member 4 facing the impeller 2. The collision prevention element 21 is provided in the collision prevention groove 20, which prevents the impeller 2 from rotating and colliding with the disassembly member 4 to generate impact noise, thereby reducing noise.

[0094] The material of the anti-collision element 21 is EVA foam material or soft silicone material. The anti-collision element 21 is installed between the impeller 2 and the disassembly member 4, which can effectively reduce the collision of the impeller 2 and has a shock absorbing effect.

[0095] The collision prevention element 21 may be cylindrical or cubic as long as it can prevent the impeller 2 from falling off. Furthermore, the collision prevention element 21 is expected to have the effect of preventing the generation of collision noise due to the impact of the disassembly member 4.

[0096] The distance between the surface of the collision prevention element 21 close to the impeller 2 and the surface of the impeller 2 close to the collision prevention element 21 is 0.1 mm to 5 mm, and the diameter of the collision prevention element 21 is 1 mm to 20 mm.

[0097] The vibration-proofing part and the axial tube 11 are detachably connected, the vibration-proofing part and the housing 1 are detachably connected, the axial tube 11 is connected to the housing 1 via the vibration-proofing part, and when the portable fan is used, the axial tube 11 vibrates due to the oscillation of the impeller 2, and the vibration-proofing part is connected between the housing 1 and the axial tube 11. The vibration-proofing part prevents the vibration of the impeller 2 from being transmitted to the housing 1, preventing noise that affects the user experience.

[0098] 59, 60, 61 and 62, the vibration-proof part is an annular body 3. The inner circumference of the annular body 3 is engaged with the shaft tube 11. A first protrusion 22 is protruded from the end of the shaft tube 11, extending outward along the diameter direction, and an inner groove 23 is formed on the inner wall of the annular body 3, recessed in a direction away from the axis of the annular body 3, the first protrusion 22 is inserted into the inner groove 23, and there is a gap between the first protrusion 22 and the inner groove 23. When the shaft tube 11 vibrates, the first protrusion 22 is vibrated. However, since there is a gap between the first protrusion 22 and the inner groove 23, the amplitude of vibration of the first protrusion 22 is smaller than the gap between the first protrusion 22 and the inner groove 23, and the transmission of vibration to the housing 1 can be reduced. This structure is easy to assemble and has high assembly efficiency.

[0099] 59, 60, 61, 62 and 65, the outer periphery of the annular body 3 is engaged with the housing 1. An outer groove 24 recessed toward the axis of the annular body 3 is formed on the outer wall of the annular body 3. A second protrusion 25 engaged with the outer groove 24 is formed on the housing 1. The second protrusion 25 is inserted into the outer groove 24. There is a gap between the second protrusion 25 and the outer groove 24, and when the shaft cylinder 11 vibrates, the second protrusion 25 is vibrated. Since there is a gap between the second protrusion 25 and the outer groove 24, the amplitude of the vibration of the second protrusion 25 is smaller than the gap between the second protrusion 25 and the outer groove 24, and the transmission of vibration to the housing 1 can be reduced. This structure is easy to assemble and has high assembly efficiency.

[0100] 59, 60, 61, 62 and 65, the material of the annular body 3 is soft and the annular body 3 is deformable, and when the portable fan is started, the impeller 2 sways up and down and vibrates, the shaft cylinder 11 is vibrated and the vibration is transmitted to the annular body 3, which deforms the annular body 3, and part of the vibration energy is stored in the deformed annular body 3, and the remaining energy is transmitted to the housing 1. This inevitably reduces the vibration energy transmitted to the housing 1, and also reduces the generated noise and vibration amplitude.

[0101] 59, 60, 61 and 62, the housing 1 is enclosed to form an attachment channel 31 having an opening at one end. The opening is set to correspond to the impeller 2. The impeller 2 can be taken out of the attachment channel 31 and disassembled to wash the impeller 2. A disassembly member 4 is provided at the opening of the housing 1, and the disassembly member 4 is used to cover the attachment channel 31 and prevent hair from entering the attachment channel 31.

[0102] 63 and 64, the disassembly member 4 is detachably connected to the housing 1. The disassembly member 4 can be disassembled and assembled to the housing 1 to facilitate removal of the impeller. One of the disassembly member 4 and the housing 1 is provided with a turnbuckle 14, and the other is provided with a turnbuckle groove 13. Of course, in other embodiments, one of the disassembly member 4 and the housing 1 is provided with an external male thread, and the other is provided with an internal female thread, and the disassembly member 4 is screwed into the housing 1. Of course, in other embodiments, one of the disassembly member 4 and the housing 11 is provided with a first magnet, and the other is provided with a second magnet, and the disassembly member 4 and the housing 1 are connected by magnetic force.

[0103] A turnbuckle 14 is provided on one of the disassembly member 4 and the housing 1, and a turnbuckle groove 13 is provided on the other. The turnbuckle groove 13 has a first position and a second position that are switched by sliding the turnbuckle 14. The disassembly member 4 and the housing 1 rotate to switch between a first alignment position and a second alignment position. When the disassembly member 4 and the housing 1 are in the first alignment position, the turnbuckle 14 is inserted into the first position of the turnbuckle groove 13, and when the disassembly member 4 and the housing 1 are in the second alignment position, the turnbuckle 14 slides into the second position of the turnbuckle groove 13 to limit the relative displacement in the axial direction of the disassembly member 4 and the housing 1. By sliding the disassembly member 4 and the housing 1 to switch positions, the turnbuckle 14 enters the second position of the turnbuckle groove 13, and the connection between the disassembly member 4 and the housing 1 is realized by utilizing the property of limiting the mutual movement of the turnbuckle groove 13 and the turnbuckle 14.

[0104] A turnbuckle groove 13 is provided on the outer wall of the disassembly member 4, and a turn lock portion 14 is provided on the inner wall of the mounting channel 31 at the opening of the housing 1. A first groove 15 and a second groove 16 are provided on the outer wall of the disassembly member 4 along its diameter direction, the first groove 15 and the second groove 16 are connected to each other, a first position of the turn lock groove 13 corresponds to the position of the first groove 15, a second position of the turn lock groove 13 corresponds to the position of the second groove 16, and a first elastic buckle 17 is provided protruding into the second groove 16 along the diameter direction of the disassembly member 4.

[0105] A third groove 19 is provided on the inner wall of the opening of the housing 1. The third groove 19 is provided along the diameter direction of the housing 1. A second elastic buckle 18 is provided on the side of the third groove 19 adjacent to the disassembly member 4. The second elastic buckle 18 is installed stretched toward the diameter direction of the housing 1 along the opening of the housing 1. The second elastic buckle 18 is connected to the housing 1. When the second elastic buckle 18 slides from the first groove 15 into the second groove 16, it limits the relative displacement of the disassembly member 4 and the housing 1 in the axial direction.

[0106] Example 7 As shown in Figs. 66 to 68, they are schematic diagrams of a first embodiment of the portable fan 100 of the present application. The portable fan 100 includes a housing 1, a support member 2, and a fan assembly 3. The support member 2 is installed on the side facing the neck of the human body, and the support member 2 is rotatably connected to the housing 1 and used to support the posterior neck region of the human body. The fan assembly 3 is accommodated in the housing 1. By arranging the support member 2 to support the posterior neck region of the human body, the housing 1 does not hit the person, and the support member 2 supports the housing 1 and the posterior neck region of the human body to form a gap between the housing 1 and the posterior neck region of the human body, thereby reducing the contact area between the housing 1 and the posterior neck region of the human body and improving the cooling effect of the portable fan 100.

[0107] As shown in Figs. 66 to 68, the housing 1 includes a first side wall 11 facing the neck of the human body, and a second side wall 12 away from the neck of the human body. A first blending portion 18 is protruding from the first side wall 11. A second blending portion 21 is correspondingly provided on the support member 2. The second blending portion 21 is rotatably connected to the first blending portion 18. The support member 2 is rotatable with respect to the first side wall 11.

[0108] As shown in Figs. 68 to 70, in this embodiment, the first blending section 18 includes two pivot joints 181 and an elastic arm 182 located between the two pivot joints 181, and a protrusion 183 is provided at the free end of the elastic arm 182. The second blending section 21 includes a pivot column 211. A surface of the pivot column 211 is provided with a plurality of grooves 212. Both ends of the pivot column 211 are rotatably connected to the two pivot joints 181. When the support member 2 rotates, the protrusions 183 are accommodated in different grooves 212 and are positioned at different angles when the support member 2 rotates up and down.

[0109] As shown in Figs. 66 to 68, the housing 1 includes two clamp arms 13 arranged symmetrically. The two clamp arms 13 are rotatably connected via a rotating connector 4. The pivot angle range of each clamp arm 13 is ±10°. The two clamp arms 13 are rotatably connected, which makes it easy for a user to adjust the distance between the free ends of the two clamp arms 13, thereby facilitating installation and fixing. Each clamp arm 13 is formed with an air inlet 14, a housing cavity 15, an air duct 16, and an air outlet 17, which are sequentially communicated. The fan assembly 3 is housed in the housing cavity 15 and is used to blow air from the air inlet 14 through the air duct 16 and blow air to the air outlet 17.

[0110] 66 to 68, the portable fan 100 is provided with two support members 2 corresponding to the two clamp arms 13. When the two clamp arms 13 rotate, the positions of the two support members 2 in contact with the human body also change; however, because the support members 2 and the clamp arms 13 are rotatably connected, the two support members 2 can each be adjusted to fit the human neck, thereby improving wearing comfort.

[0111] As shown in Figs. 66 to 68, each of the clamp arms 13 is provided with a first air inlet 141 located on the first side wall 11 and a second air inlet 142 located on the second side wall 12 corresponding to each of the fan assemblies 3. The receiving cavity 15 is located at one end where the two clamp arms 13 are connected, and the support member 2 is disposed corresponding to the receiving cavity 15. There is a gap between at least a part of the support member 2 and the first air inlet 141. Therefore, when the portable fan 100 is used, the support member 2 does not affect normal intake of air from the first air inlet 141. Furthermore, referring to Fig. 70, the support member 2 is also formed with a through hole 22 corresponding to the first air inlet 141, which can absorb and evaporate sweat generated by contact between the support member 2 and a person's neck, thereby improving the wearing comfort by keeping the user's neck always dry and fresh.

[0112] 67 and 71, the second side wall 12 includes a main wall 121 and an auxiliary wall 122. The main wall 121 and the auxiliary wall 122 are arranged in a stepped shape. The second air inlet 142 is formed between the main wall 121 and the auxiliary wall 122. The second air inlet 142 is concealedly provided between the main wall 121 and the auxiliary wall 122, which has a beautiful appearance, makes it difficult for a user's hair to enter the second air inlet 142, and improves product safety.

[0113] As shown in FIG. 68 and FIG. 71, the rotating connector 4 includes a first connector 41 and a second connector 42. The first connector 41 is fixedly connected to one of the clamp arms 13, and the second connector 42 is fixedly connected to the other of the clamp arms 13. The first connector 41 includes a first fixing portion 411, and the second connector 42 includes a second fixing portion 421, and the first fixing portion 411 and the second fixing portion 421 are rotatably connected. Both the first fixing portion 411 and the second fixing portion 421 are spindle-shaped, and when the two clamp arms 13 rotate, they rotate along the spindle-shaped first fixing portion 411 and the second fixing portion 421, making it more beautiful.

[0114] As shown in Figures 68, 71 and 72, a bulkhead assembly 5 is also included. The bulkhead assembly 5 separates the communicating accommodating cavity 15 and the air duct 16 from other spaces in the housing 1. The width of the end of the air duct 16 away from the accommodating cavity 15 is smaller than the width of the end of the air duct 16 close to the accommodating cavity 15 to ensure space for accommodating the battery 6. In this embodiment, the battery 6 is accommodated in both of the two clamp arms 13, and the two fan assemblies 3 can operate simultaneously or independently. The air outlet 17 is formed through the side of the air duct 16 and extends to essentially cover the entire air duct 16. The width of the end of the air duct 16 away from the accommodating cavity 15 is narrower, which makes it easier to collect wind, thereby making the wind discharge from each part of the air outlet 17 more uniform.

[0115] As shown in FIG. 73, it is a schematic diagram of the second embodiment of the portable fan 100 of the present application. The main differences from the first embodiment are as follows. The second blending part 21 includes a mounting bracket 213, the first blending part 18 includes a fixed member 184 fixed to the first side wall 11 and a rotating ball 185 connected to the fixed member 184 through the mounting bracket 213, and the mounting bracket 213 rotates relative to the rotating ball 185, thereby causing the support member to rotate relative to the rotating ball 185. Compared with the support member that can rotate up and down in the first embodiment, in this embodiment, the support member can rotate in a spherical shape, which is more comfortable to wear. Other structures and functions are basically the same as those in the first embodiment, so they will not be described again here.

[0116] As shown in FIG. 74 and FIG. 75, it is a schematic diagram of the third embodiment of the portable fan 100 of the present application. The main differences from the second embodiment are as follows. The shape of the mounting bracket 213 matches the shape of the second blending part 21. In the rotating connector 4, the first fixing part 411 includes a plurality of first pieces 412, the second fixing part 421 includes a plurality of second pieces 422, and the plurality of first pieces 412 and the plurality of second pieces 422 are crossed and stacked. This greatly increases the friction between the first fixing part 411 and the second fixing part 421, and when the two clamp arms 13 rotate, they can rotate and stop at any time, and have better safety performance. Other structures and performances are basically the same as those of the first embodiment, so they will not be described again here.

[0117] In addition to the above embodiment, it should be understood that in other embodiments, the support member 2 and the housing 1 may be connected via a bendable molding member, through which the support member 2 can be better fitted to the rear neck of the human body.

[0118] Example 8 As shown in Figs. 76 to 80, these are schematic diagrams of a first embodiment of a portable fan 100 of the present application. The portable fan 100 includes a clamp arm 1, a fan assembly 2, and a rotating joint structure 3. There are two clamp arms 1, and each clamp arm 1 is provided with an air inlet 11, a housing cavity 12, an air duct 13, and an air outlet 14 that are mutually communicated. There are two fan assemblies 2, and one fan assembly 2 is disposed in one housing cavity 12, and the fan assembly 2 is used to blow air from the air inlet 11 through the air duct 13 and out of the air outlet 14. The rotating joint structure 3 includes the first hinge 31 and the second hinge 32. The first hinge 31 includes a plurality of first pieces 311 arranged in parallel with a gap therebetween. The second hinge 32 includes a plurality of second pieces 321 arranged in parallel with a gap therebetween.

[0119] Here, the first hinge 31 is fixed to one of the clamp arms 1, and the second hinge 32 is fixed to the other of the clamp arms 1, and the first hinge 31 and the second hinge 32 are fixedly arranged with each other, and the first pieces 311 and the second pieces 321 are stacked crosswise, so that the two clamp arms 1 can rotate relatively, and maintain a spin-stop state when the rotation stops. By disposing the first hinge 31 including the first pieces 311 and the second hinge 32 including the second pieces 321, the first pieces 311 and the second pieces 321 are stacked crosswise, which greatly increases the friction force between the first hinge 31 and the second hinge 32, and when the two clamp arms 1 rotate, they can rotate and stop at any time, and have better safety performance.

[0120] In this embodiment, the first hinge 31 includes five first pieces 311, and the second hinge 32 includes six second pieces 321, and each first piece 311 has two contact surfaces with the adjacent two second pieces 321. When the first pieces 311 and the second pieces 321 are cross-stacked, there are a total of ten contact surfaces, and the frictional force is ten times that of one contact surface. Therefore, after the connection of the rotary connection structure 3 is completed, the frictional force of the rotation is relatively large, and it is possible to rotate and stop at any time. Of course, the number of the first pieces 311 and the second pieces 32 is not limited to this.

[0121] In other embodiments, the number of the clamp arms 1 may be three, and the rotary connection structure 3 is provided between two adjacent clamp arms 1, so that the two adjacent clamp arms 1 are rotatable and can rotate and stop at any time during rotation.

[0122] 76 to 78, in this embodiment, the fan assembly 2 is a centrifugal fan, and two air inlets 11 are provided on the clamp arm 1 corresponding to each of the fan assemblies 2, so that air is taken in from both sides, the wind is stronger, and the exhaust effect is improved. A support part is also provided on the side of the portable fan 100 facing the neck, and the support part can support the portable fan 100 to fit the neck, not only making it more comfortable to wear, but also widening the distance between the housing of the clamp arm 2 and the neck, so that air can easily enter the air inlet 11 facing the neck side.

[0123] As shown in Figs. 78 to 80, the thickness of the first pieces 311 is the same, the thickness of the second pieces 321 is the same, and the thickness of the first pieces 311 is the same as the thickness of the second pieces 321. The thickness of each of the first pieces 311 is 1.5 mm, and the thickness of each of the second pieces 321 is 1.5 mm. The distance between two adjacent first pieces 311 is 0.01 mm to 0.3 mm larger than the thickness of the second pieces 321. In this embodiment, the distance between two adjacent first pieces 311 is 0.01 mm larger than the thickness of the second pieces 321. The distance between two adjacent second pieces 321 is 0.1 mm larger than the thickness of the first pieces 311.

[0124] As shown in Figs. 78 to 80, this embodiment also includes a pivot 33. The pivot 33 penetrates the first pieces 311 and the second pieces 321 that are stacked crosswise so as to fix the first hinge 31 and the second hinge 32. The accommodating cavity 12 is located at one end of the clamp arm 1 close to the rotating connection structure 3. The accommodating cavity 12 accommodates the fan assembly 2. The air duct 13 and the circuit compartment 15 are provided in a direction from the accommodating cavity 12 toward the free end of the clamp arm 1, and at least one of the circuit compartments 15 accommodates a battery 4. The battery 4 supplies power to the fan assemblies 2, and the two fan assemblies 2 operate simultaneously or independently.

[0125] As shown in Figs. 78 to 80, the first piece 311 and the second piece 321 have the same shape, and both are irregular polygons. When the free ends of the two clamp arms 1 rotate and move apart, the contact area between the first piece 311 and the second piece 321 increases, thereby increasing the friction between the first hinge 31 and the second hinge 32. When the free ends of the two clamp arms 1 rotate close to each other, the contact area between the first piece 311 and the second piece 321 decreases, thereby decreasing the friction between the first hinge 31 and the second hinge piece 32. That is, the friction force between the first hinge 31 and the second hinge 32 when the free ends of the two clamp arms 1 rotate and move apart is greater than the friction force between the first hinge 31 and the second hinge 32 when the free ends of the two clamp arms 1 rotate close to each other. In other words, since it is easier to rotate the free ends of the two clamp arms 1 close together than to rotate them apart, when the two clamp arms 1 are attached to the neck of a user, they do not easily slip off the neck of the user.

[0126] 77 to 80, since the position of the pivot 33 is close to the free ends of the first piece 311 and the second piece 321, and there is no restrictive structure between the first piece 311 and the second piece 321, theoretically the first hinge 31 and the second hinge 32 can rotate more than 180°. However, according to the actual needs of the product, the distance between the two clamp arms 1 is small, and due to the restriction of the distance between the two clamp arms 1, the pivot angle range of the two clamp arms 1 is ±10°.

[0127] As shown in FIG. 81 and FIG. 82, it is a schematic diagram of the rotation coupling structure 3 in the second embodiment of the portable fan 100 of the present application. The main difference from the first embodiment is as follows. The pivot 33 does not penetrate the first piece 311 and the second piece 321, and one of the first hinge 31 and the second hinge 32 is provided with a pivot part 322, and the other is provided with a pivot hole 312. The pivot part 322 is fixed to the pivot hole 312 and is used to fix the first hinge 31 and the second hinge 32. No additional parts are required, and the pivot part 322 and the pivot hole 312 are directly molded into the first hinge 31 and the second hinge 32 themselves, so that the installation procedure is saved. The number of corresponding pivot portions 322 and bolt holes 312 is two, and the two pivot portions 322 and the bolt holes 312 are provided on both sides of the plurality of first pieces 311 and the plurality of second pieces 321, respectively. Other configurations and operations are basically the same as those in the first embodiment, so a description thereof will be omitted here.

[0128] Example 9 The portable fan of the present application includes a housing 1, an axial tube 11 disposed in the housing 1, a rotating shaft 12 disposed in an axial hole of the axial tube 11 and rotatable relative to the axial tube 11, a stator sleeved on the outside of the axial tube 11, and an impeller 2 connected to the tip of the rotating shaft 12. In this embodiment, the structure will be described using a portable fan as an example. The portable fan can also be applied to devices such as a desktop fan, a handheld fan, and a baby stroller fan.

[0129] 83 and 84, the portable fan includes an anti-vibration part attached to the end of the axial tube 11. The axial tube 11 vibrates due to the oscillation of the impeller 2. An anti-vibration part is connected between the housing 1 and the axial tube 11 to prevent the vibration of the impeller 2 from being transmitted to the housing 1. This avoids noise that affects the user experience.

[0130] The vibration-proofing part and the axial tube 11 are detachably connected, the vibration-proofing part and the housing 1 are detachably connected, the axial tube 11 is connected to the housing 1 via the vibration-proofing part, and when the portable fan is used, the axial tube 11 vibrates due to the oscillation of the impeller 2, and the vibration-proofing part is connected between the housing 1 and the axial tube 11. The vibration-proofing part prevents the vibration of the impeller 2 from being transmitted to the housing 1, preventing noise that affects the user experience.

[0131] 83, 84, 85 and 86, the vibration-proof part is an annular body 3. The inner circumference of the annular body 3 is engaged with the axial tube 11. A first protrusion 22 extending outward along the diameter direction is formed at the end of the axial tube 11, and an inner groove 23 recessed in a direction away from the axial center of the annular body 3 is formed on the inner wall of the annular body 3, the first protrusion 22 is inserted into the inner groove 23, and there is a gap between the first protrusion 22 and the inner groove 23. When the axial tube 11 vibrates, the first protrusion 22 is vibrated and driven, and since there is a gap between the first protrusion 22 and the inner groove 23, the amplitude of vibration of the first protrusion 22 is smaller than the gap between the first protrusion 22 and the inner groove 23, and the transmission of vibration to the housing 1 can be reduced, and this structure is easy to assemble and has high assembly efficiency.

[0132] 83, 84, 85, 86 and 89, the outer periphery of the annular body 3 is engaged with the housing 1. An outer groove 24 recessed toward the axis of the annular body 3 is formed on the outer wall of the annular body 3. A second protrusion 25 engaged with the outer groove 24 is formed on the housing 1. The second protrusion 25 is inserted into the outer groove 24. There is a gap between the second protrusion 25 and the outer groove 24, and when the axial tube 11 vibrates, the second protrusion 25 is vibrated and driven. Since there is a gap between the second protrusion 25 and the outer groove 24, the amplitude of vibration of the second protrusion 25 is smaller than the gap between the second protrusion 25 and the outer groove 24, and the transmission of vibration to the housing 1 can be reduced. This structure is easy to assemble and has high assembly efficiency.

[0133] 83, 84, 85, 86 and 89, the material of the ring-shaped body 3 is soft and the ring-shaped body 3 is deformable, and when the portable fan is started, the impeller 2 sways up and down and vibrates, the axial tube 11 is vibrated and the vibration is transmitted to the ring-shaped body 3, the ring-shaped body 3 is deformed by the vibration, and part of the vibration energy is stored in the deformed ring-shaped body 3, and the remaining energy is transmitted to the housing 1. As a result, the vibration energy transmitted to the housing 1 is inevitably reduced, and the generated noise and vibration amplitude are also reduced.

[0134] 83, 84, 85 and 86, the housing 1 is enclosed to form an attachment channel 31 having an opening at one end. The opening is set to correspond to the impeller 2. The impeller 2 can be removed from the attachment channel 31 and disassembled to clean the impeller 2. A turntable 4 is provided at the opening of the housing 1, and the turntable 4 is used to cover the attachment channel 31 and prevent hair from entering the attachment channel 31.

[0135] 87 and 88, the turntable 4 is detachably connected to the housing 1. The turntable 4 can be disassembled and assembled to the housing 1 to facilitate removal of the impeller. A turnbuckle 14 is provided on one of the turntable 4 and the housing 1, and a turnbuckle groove 13 is provided on the other. Of course, in other embodiments, an external male thread is provided on one of the turntable 4 and the housing 1, and an internal female thread is provided on the other, so that the turntable 4 is screwed into the housing 1. Of course, in other embodiments, a first magnet is provided on one of the turntable 4 and the housing 11, and a second magnet is provided on the other, so that the turntable 4 and the housing 1 are connected by magnetic force.

[0136] A turnbuckle 14 is provided on one of the turntable 4 and the housing 1, and a turnbuckle groove 13 is provided on the other. The turnbuckle groove 13 has a first position and a second position that are switched by sliding the turnbuckle 14. The turntable 4 and the housing 1 rotate to switch between the first alignment position and the second alignment position. When the turntable 4 and the housing 1 are in the first alignment position, the turnbuckle 14 is inserted into the first position of the turnbuckle groove 13, and when the turntable 4 and the housing 1 are in the second alignment position, the turnbuckle 14 slides into the second position of the turnbuckle groove 13 to limit the relative displacement of the turntable 4 and the housing 1 in the axial direction. By sliding the turntable 4 and the housing 1 to switch positions, the turnbuckle 14 enters the second position of the turnbuckle groove 13, and the connection between the turntable 4 and the housing 1 is realized by utilizing the characteristics of the turnbuckle groove 13 and the turnbuckle 14 restricting the movement of each other.

[0137] A turnbuckle groove 13 is provided on the outer wall of the turntable 4, and a turn lock portion 14 is provided on the inner wall of the mounting channel 31 at the opening of the housing 1. A first groove 15 and a second groove 16 are provided on the outer wall of the turntable 4 along its diameter direction, the first groove 15 and the second groove 16 are connected to each other, a first position of the turn lock groove 13 corresponds to the position of the first groove 15, a second position of the turn lock groove 13 corresponds to the position of the second groove 16, and a first elastic buckle 17 is provided protruding into the second groove 16 along the diameter direction of the turntable 4.

[0138] A third groove 19 is provided on the inner wall of the opening of the housing 1. The third groove 19 is provided along the diameter direction of the housing 1. A second elastic buckle 18 is provided on the side of the third groove 19 adjacent to the turntable 4. The second elastic buckle 18 is installed stretched toward the diameter direction of the housing 1 along the opening of the housing 1. The second elastic buckle 18 is connected to the housing 1. When the second elastic buckle 18 slides from the first groove 15 into the second groove 16, it limits the relative displacement of the turntable 4 and the housing 1 in the axial direction.

[0139] A fourth groove 20 is formed in the center of the bottom surface of the turntable 4 facing the impeller 2, and a collision prevention element 21 is provided on the bottom surface of the turntable 4 facing the impeller 2. The collision prevention element 21 is provided in the fourth groove 20, which prevents the impeller 2 from rotating and colliding with the turntable 4 to generate impact noise, thereby reducing noise.

[0140] The material of the anti-collision element 21 is EVA foam material or soft silicone material. The anti-collision element 21 is installed between the impeller 2 and the turntable 4, which can effectively reduce the collision of the impeller 2 and has a vibration absorption effect.

[0141] Example 10 For convenience of explanation, the up-down direction is defined as a first direction X, where the positive axis of the X axis is the upward direction, the left-right direction is defined as a second direction Y, where the positive axis of the Y axis is the leftward direction, and the front-rear direction is defined as a third direction Z, where the positive axis of the Z axis is the forward direction. Any two of the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0142] As shown in Figures 90, 93 and 94, it is a schematic diagram of a first embodiment of the portable fan of the present application. The portable fan 100 includes a connection member 1 and two clamp arms 2 pivotally connected to the connection member 1. The left and right ends of the connection member 1 are pivotally connected to the two clamp arms 2, respectively, to adjust the distance between the free ends of the two clamp arms 2. The connection member 1 is arranged to connect the two clamp arms 2, so that the free ends of the two clamp arms 2 can be moved away from each other, thereby making it easier for the user to attach and detach the portable fan 100, and the free ends of the two clamp arms 2 can be moved closer to each other, so that the portable fan 100 can be stably fixed to the neck of the user and is less likely to fall off, and the portable fan 100 can be easily stored.

[0143] As shown in Figs. 90 to 92, at the installation location of the connection member 1 and the clamp arm 2, the connection member 1 is formed with a first mating surface 11 facing the clamp arm 2, and the clamp arm 2 is formed with a second mating surface 22 facing the connection member 1. The first mating surface 11 and the second mating surface 22 are two parallel arc surfaces. In this embodiment, the second mating surface 22 is a concave curved surface, the clamp arm 2 is formed with a protrusion 221, and the protrusion 221 protrudes from the second mating surface 22. The first mating surface 11 is a convex curved surface, the connection member 1 is formed with a locking groove 111, and the locking groove 111 is recessed from the first mating surface 11. The pivot 13 penetrates and connects the protrusion 221 and the locking groove 111 simultaneously in the first direction X, thereby allowing the protrusion 221 and the locking groove 111 to pivot stably. Here, the volume of the locking groove 111 is larger than the volume of the protrusion 221. When the protrusion 221 is inserted into the locking groove 111, if the pivot 13 simultaneously penetrates and connects the protrusion 221 and the locking groove 111 in the first direction X, the locking groove 111 also leaves a space for the protrusion 221 to pivot, and the inner wall of the locking groove 111 restricts the pivoting of the protrusion 221.

[0144] In another embodiment, the first mating surface 11 may be a concave curved surface, the connecting member 1 is formed with the protrusion 221, and the protrusion 221 protrudes from the first mating surface 11. The second mating surface 22 is a convex curved surface, the clamp arm 2 is formed with the locking groove 111, and the locking groove 111 is recessed from the second mating surface 22. In addition, the pivot 13 penetrates and connects the protrusion 221 and the locking groove 111 simultaneously in the first direction X, thereby allowing the protrusion 221 and the locking groove 111 to pivot stably. Here, the volume of the locking groove 111 is larger than the volume of the protrusion 221. The inner wall of the locking groove 111 limits the pivoting of the protrusion 221.

[0145] 90 and 93, when the two protrusions 221 pivot so that the free ends of the two clamp arms 2 are very close to each other, the portable fan 100 occupies the smallest space as a whole, and the opening between the two clamp arms 2 is the smallest, which is convenient for fixing the portable fan 100 to the neck of the user. The distance between the free ends of the two clamp arms 2 is 0 mm to 16 mm. When the two protrusions 221 pivot so that the free ends of the two clamp arms 2 are far apart, the opening between the two clamp arms 2 is the largest, which is convenient for the user to attach and detach the portable fan 100, and the portable fan 100 can be attached to necks of different sizes. The distance between the free ends of the two clamp arms 2 is 160.3 mm to 162.7 mm. It should be understood that the two clamp arms 2 are positioned and maintained at the corresponding positions when the pivots of the two protrusions 221 stop. That is, a damping force exists between the pivot 13 and the protrusion 221, and between the pivot 13 and the locking groove 111. When the pivot of the protrusion 221 stops, the entire clamp arm 2 can be positioned at that angle and maintained. The pivot angle range of the protrusion 221 is ±10°, and the protrusion 221 rotates continuously within the pivot angle range, so that the distance between the two clamp arms 2 changes continuously between when they are very close and when they are very far.

[0146] 91, 92, 95 and 98, the wiring groove 222 is formed on the surface of the protrusion 221, the wiring groove 222 penetrates the second mating surface 22 and communicates with the space inside the housing 21, a wiring hole 112 is formed in the locking groove 111, the two wiring holes 112 communicate with each other, and the wiring groove 222 and the wiring hole 112 communicate with each other, so that the wire 7 of one of the clamp arms 2 passes through the wiring groove 222 and the wiring hole 112 and enters the other clamp arm 2. The wiring groove 222 is recessed from the surface of the protrusion 211 with a sufficient space secured thereto, and at the same time, the wiring hole 112 also secures a sufficient space, so that the wire 7 is not pushed when the clamp arm 2 rotates. When the first mating surface 11 is a concave surface and the protrusion 221 is disposed to protrude from the first mating surface 11 , the wiring groove 222 penetrates the first mating surface 11 .

[0147] As shown in FIG. 90, FIG. 93 and FIG. 94, the connecting member 1 is provided with a supporting portion 12 that protrudes corresponding to the rear neck of the user. The supporting portion 12 includes a supporting rod 121 and a supporting pad 122 connected to the connecting member 1. The supporting pad 122 fits the neck to separate the connecting member 1 from the rear neck, thereby preventing the pivot between the clamp arm 2 and the connecting member 1 from affecting the rear neck of the user, and preventing the clamp arm 2 from pinching the rear neck of the user during the pivoting process. The length of the supporting pad 122 in the second direction Y is longer than the length of the connecting member 1 in the second direction Y. Because the surface area of ​​the supporting pad 122 is large, the supporting pad 122 has a large contact area with the rear neck of the user, making it more comfortable for the user to wear. At the same time, the longer supporting pad 122 can abut against the two clamp arms 2 to prevent the two clamp arms 2 from getting too close to pinch the neck, causing neck pain or injury.

[0148] As shown in Figures 95, 96, 98 and 99, each of the clamp arms 2 includes a shell 21. The shell 21 is provided with an accommodation cavity 211, an air duct 212 and a battery chamber 213 in this order along the extension direction. The accommodation cavity 211 is installed adjacent to the connection member 1. The accommodation cavity 211 accommodates the fan assembly 3. The fan assembly 3 includes a centrifugal fan blade 31 and a motor 32. The motor 32 drives the centrifugal fan blade 31 to rotate. The battery chamber 213 is located at a free end, and each of the two battery chambers 213 accommodates two batteries 4. The batteries 4 supply power to the corresponding fan assembly 3. The two fan assemblies 3 operate simultaneously or independently.

[0149] As shown in Figures 95, 96, 98 and 99, the axis of the centrifugal fan blade 31 is perpendicular to the first direction X, i.e., the centrifugal fan blade 31 is erected in the first direction X. The battery 4 is a cylindrical battery 4, and the extension direction of the battery 4 coincides with the extension direction of the battery chamber 213. Since the centrifugal fan blade 31 needs to be arranged vertically in the accommodating cavity 211, the height of the accommodating cavity needs to be set high. Since the battery chamber 213 extends approximately in the third direction Z, the height of the accommodating cavity can be set very low. The height of the accommodating cavity 211 in the first direction X is 1.45 to 2 times the height of the battery chamber 213 in the first direction X. When the user wears the portable fan 100, a part of the support part 12 supporting the connecting member 1 and the two receiving cavities 211 is provided corresponding to the back of the neck, and the compact battery chamber 213 is provided corresponding to the left and right neck parts and the front chest part, which is also beautiful in appearance. At the same time, when the user wears it, the two batteries 4 in the two battery chambers 213 face forward and downward, the two centrifugal fan blades 31 and the two motors 32 face backward and downward, the gravity in the front and rear of the portable fan 100 is relatively balanced, the portable fan 100 fits more closely to the user's neck, the portable fan 100 is comfortable to wear as a whole, and the user does not feel tired even when wearing it for a long time.

[0150] As shown in Figures 95, 96, 98 and 99, the shell 21 is formed with two air inlets 214 on both sides of each of the accommodating cavities 211. The sidewall of the shell 21 is formed with an air outlet 215 in the air duct 212. The air inlet 214, the accommodating cavity 211, the air duct 212 and the air outlet 215 are sequentially communicated. When a user wears the portable fan 100, the air outlet 215 faces at least the chin and face of the user, and the air is blown out to the part of the user that needs cooling the most, thereby cooling the user. Of course, the air outlet 215 can be installed facing the left and right neck parts, or can be installed downwards to face the neck. Specifically, the shell 21 has a first shell 21a facing the neck side and a second shell 21b away from the neck, and the first shell 21a and the second shell 21b are both formed with the air inlets 214 corresponding to the centrifugal fan blades 31, and the air inlets 214 provided in the first shell 21a facing the neck can obtain an air intake effect for the neck, and can also obtain a cooling and dehumidifying effect for the rear neck where the air outlets 215 are not provided. The vertical projection of the two second mating surfaces 22 in the first direction X forms two circular arcs, the radius of the circle on which the two circular arcs are located is 7.5mm to 9.5mm, and the distance between the two centers of the circle on which the two circular arcs are located is 15mm to 26mm, thereby limiting the distance between the two fan assemblies 3, increasing the air intake area and heat dissipation area of ​​the rear neck, and avoiding turbulence of the wind from the two fan assemblies 3.

[0151] As shown in Figs. 97 and 99, each of the air inlets 214 is provided with a mounting portion 216 and a connection portion 217 connecting the mounting portion 216 and the shell 21. The fan assembly 3 is attached to the mounting portion 216. The motor 32 is disposed corresponding to the mounting portion 216. The mounting portion 216 and the connection portion 217 protrude to form a wire passing space 218, and both ends of the wire passing space 218 extend from the connection portion 217 to the shell 21. Each of the air inlets 214 is provided with a baffle 5. The baffle 5 is fixed to the mounting portion 216, covers the air inlet 214 and the wire passing space 218, prevents hair and other debris from entering the air inlet 214, and the wire 7 is not exposed, making the appearance more neat and elegant. In this embodiment, the wire passing space 218 is formed by protruding the mounting portion 216 and the connecting portion 217 on one side of the first shell 21a. The wire passing space 218 may be formed by protruding the mounting portion 216 and the connecting portion 217 on one side of the second shell 21b. A gap 51 is formed between the baffle 5 and the shell 21, and the outside air flows through the gap 51 to the air inlet 214. When the two clamp arms 2 are pivoted close to each other, the support pad 122 abuts against the two baffles 5 located on the shell 21 side, limiting the distance between the two fan assemblies 3 to avoid turbulence and improve the effect of blowing air.

[0152] As shown in Figures 95, 96, 98 and 99, the air duct 212 is provided with a partition wall 6. The partition wall 6 is connected to the inner wall of the air duct 212. The partition wall 6 includes a first plate 61 adjacent to the air outlet 215, a second plate 62 facing the first plate 61, and a third plate 63 connecting the first plate 61 and the second plate 62. The first plate 61 contacts a part of the inner wall of the air duct 212, and a gap is formed between at least a part of the second plate 62 and the inner wall of the air duct 212, and the third plate 63 separates the air duct 212 from the battery chamber 213. The partition wall 6 also includes a fourth plate 64 connecting the first plate 61, the second plate 62 and the third plate 63 and facing the air outlet 215. A gap is formed between at least a part of the fourth plate 64 and a part of the inner wall of the air duct 212. At least two of the air outlets 215 are provided in each of the shells 21, and the partition wall 6 is provided with an air guide plate 65 corresponding to each of the air outlets 215, and the air guide plate 65 connects the first plate 61 and the second plate 62 and has an arcuate surface. The partition wall 6 and the wall of the shell 21 can be integrally formed or can be formed separately and then assembled, and the first plate 61, the second plate 62, the third plate 63, the fourth plate 64 and the air guide plate 65 can all be formed separately and then assembled, or some of them can be formed integrally and some of them can be formed separately, or all of them can be formed integrally.

[0153] When the air duct 212 is passed from the tall and large accommodating cavity 211 to the small battery chamber 213, the shape of the air duct 212 becomes smaller, and the partition 6 is provided in the air duct 212, a gap is formed between at least a part of the second plate 62 and the inner wall of the air duct 212, and a gap is formed between at least a part of the fourth plate 64 and the inner wall of the air duct 212, thereby dividing the air duct 212 into auxiliary air ducts 212 with smaller volumes, and the wind blown out by the fan assembly 3 passes through the auxiliary air duct 212 with smaller volumes and is blown out from the air outlet 215, the wind force is stronger, and the cooling effect of the wind is better.

[0154] As shown in Figures 95, 96, 98 and 99, the shell 21 is provided with a cavity plate 23. In this embodiment, the cavity plate 23 is integrally formed with the shell 21, and a part of the cavity plate 23 is surrounded to form the receiving cavity 211, and a part of the cavity plate 23 forms the air duct 212. In another embodiment, the cavity plate 23 can be formed separately and then attached to the shell 21. The cavity plate 23 includes a blocking portion 231 and a guide portion 232 formed at the connection portion between the receiving cavity 211 and the air duct 212. The blocking portion 231 forms at least a part of the receiving cavity 211, and the guide portion 232 forms at least a part of the air duct 212. The blocking portion 231 is connected to the guide portion 232, and a wire cavity 233 is formed between the blocking portion 231, the guide portion 232 and the hashel 21. The guide portion 232 is provided with a through hole 2321 for passing the wire 7 therethrough.

[0155] As shown in Fig. 98 and Fig. 99, the shell 21 is also provided with a main control module 8. The main control module 8 is disposed in one of the battery compartments 213. The main control module 8 includes a main board 81, an adjustment key 82 electrically connected to the main board 81, and an interface 83. The adjustment key 82 is used to adjust the switches and wind speeds of the two fan assemblies 3, and the interface 83 is used to connect an external power source to charge the batteries 4.

[0156] 95 to 99, the wires 7 are electrically connected to two of the batteries 4, the wires 7 are electrically connected to one of the batteries 4 and the main board 81, and the wires 7 between the battery 4 arranged in the same battery chamber 213 as the main board 81 and the main board 81 are directly connected without penetrating. The wires 7 of the battery 4 located in the other battery chamber 213 must pass from one of the clamp arms 2 through the wiring groove 222 and the wiring hole 112 to enter the other clamp arm 2. Specifically, the wire 7 enters the gap between the fourth plate 64 and the inner wall of the air duct 212 from the battery 4, enters the air duct 212, passes from the air duct 212 through the through hole 2321 of the guide portion 232, enters the wire cavity 233, passes from the wire cavity 233 through the shell 21, enters the wire passing space 218, and then flows from the wire passing space 218 of one of the clamp arms 2 to the wiring groove 222, the wiring The wire passes through the wire hole 112, the wiring hole 112, and the wiring groove 222, enters the wire passing space 218 of the other clamp arm 2, then passes through the shell 21 from the wire passing space 218 to enter the wire cavity 233, enters the air duct 212 through the through hole 2321, enters the battery chamber 213 from the air duct 212 through the gap between the fourth plate 64 and the inner wall of the air duct 212, and finally is connected to another battery 4.

[0157] As shown in Figures 95 to 99, the wire 7 is electrically connected to the motor 32 and the main board 81, and the wire 7 is electrically connected to the main board 81 and the battery 4, so that the motor 32 and the battery 4 are electrically connected to the main board 81 and the wire 7. Specifically, the wire 7 connected to the motor 32 provided on the same clamp arm 2 as the main board 81 sequentially passes through the shell 21 and enters the wire passing space 218, passes through the shell 21 and enters the wire cavity 233, passes through the through hole 2321 and enters the air duct 212, passes from the air duct 212 through the gap between the fourth plate 64 and the inner wall of the air duct 212, enters the battery chamber 213, and is connected to the main board 81. The wire 7 connected to the motor 32 located in the other clamp arm 2 sequentially passes through the shell 21 and enters the wire passing space 218, passes from the wire passing space 218 of one of the clamp arms 2 through the wiring groove 222, the wiring hole 112, the wiring hole 112, and the wiring groove 222 to the wire passing space 218 of the other clamp arm 2, passes through the shell 21 to enter the wire cavity 233, passes through the through hole 2321 to enter the air duct 212, passes from the air duct 212 through the gap between the fourth plate 64 and the inner wall of the air duct 212 to enter the battery chamber 213, and is connected to the main board 81.

[0158] Since the baffle 5 covers the wire-passing space 218, the wire 7 is not exposed to the outside, making the appearance neater and more beautiful; and since the wire 7 is not exposed, damage to the wire 7 caused by external water vapor or scorching heat can be avoided, which improves product safety and helps to extend the service life of the wire 7.

[0159] As shown in FIG. 100, it is a schematic diagram of the second embodiment of the portable fan 100 of the present application. The main differences from the first embodiment are as follows. The battery 4 is accommodated in one of the two battery chambers 213, and one of the batteries 4 is electrically connected to the two fan assemblies 3 at the same time. Compared with the first embodiment, in this embodiment, the fourth plate 64 is not provided, and in each clamp arm 2, the air guide plate 65 close to the battery chamber side extends backward and is close to the other air guide plate 65. This allows wind to be smoothly blown out from the two air outlets 215 through the two air guide plates 65. In this embodiment, only one battery 4 is installed. The battery 4 and the main board 81 are disposed in the same battery chamber 213. The battery 4 and the main board 81 are electrically connected via the wire 7. The two motors 32 and the main board 81 are electrically connected via the wire 7. The other configurations and performances are basically the same as those of the first embodiment, so that the description will be omitted here.

[0160] It should be understood that one or two of the batteries 4 can be disposed within the portable fan 100. In the above two embodiments, the battery 4 is electrically connected to the main board 81 via the wires 7, and the main board 81 is electrically connected to the motor 32 via the wires 7, and in other embodiments, other connection sequences are possible.

[0161] Example 11 101 and 102, which are respectively a partial schematic diagram and a partial circuit diagram of the first embodiment of the portable fan 100 of the present application. The circuit diagram and the circuit diagram are simplified, for example, the driving circuit between the control main board 2 and the fan assembly 6 is omitted. The battery protection device 3 usually includes pins B+, B-, P+ and P-. The battery protection device 3 usually includes an intelligent processor 31, a current collection module 32 and a voltage collection module 33. The intelligent processor 31 is respectively connected to the current collection module 32 and the voltage collection module 33. The intelligent processor 31 is usually an IC control chip, but is of course not limited thereto. The working principle of the voltage collection module 33 is that the pins B+ and B- of the battery protection device 3 are respectively connected to the positive pole and the negative pole of the lithium ion battery 1, so that the battery protection device 3 can monitor the voltage between the positive and negative poles of the lithium ion battery 1. The working principle of the current collection module 32 is that by placing MOS1 and MOS2 in series in a circuit, the MOS1 and MOS2 can monitor the magnitude of the loop current.

[0162] The intelligent processor 31 monitors the voltage and loop current of the lithium ion battery 1 through the voltage collection module 33 and the current collection module 32, and controls the on and off of the MOS1 and the MOS2. The MOS1 and the MOS2 function as switches in the circuit, and control the on and off of the charging circuit and the discharging circuit, respectively. In a normal operating state, when the voltage of the lithium ion battery 1 is within the range of A to B, the MOS1 and the MOS2 are both in a conductive state. When the intelligent processor 31 detects that the voltage of the lithium ion battery 1 has reached value B based on the monitoring result of the voltage collection module 33, the intelligent processor 31 controls the MOS1 (charging circuit) to be disconnected, thereby cutting off the voltage of the lithium ion battery 1. This prevents an external power source from charging the lithium ion battery 1, and serves as an overcharge protection. When the intelligent processor 31 detects that the voltage of the lithium ion battery 1 is lower than the value A based on the monitoring result of the voltage collection module 33, it controls the MOS2 (discharge circuit) to be disconnected, thereby disconnecting the discharge circuit. This makes the lithium ion battery 1 unable to discharge the load, thus fulfilling the role of discharge protection. In the normal discharge process of the lithium ion battery 1 to the load, a discharge current flows through the MOS1 and MOS2 connected in series, and a voltage is generated at both ends due to the on-resistance of the MOS1 and MOS2. When the intelligent processor 31 detects the voltage value, if an abnormality occurs in the load for some reason, the loop current increases, and if the voltage value at both ends of the MOS1 and MOS2 is greater than the value C, the intelligent processor 31 controls the disconnection of the MOS1 and MOS2 (discharge circuit), thereby disconnecting the discharge circuit, thereby making the current in the loop zero, fulfilling the role of overcurrent protection.During the discharge process from the lithium ion battery 1 to the load, if the loop current becomes large and the voltage value between the MOS1 and the MOS2 is greater than the D value (D>C), the intelligent processor 31 determines that the load is short-circuited and controls the MOS2 (discharge circuit) to be disconnected, thereby disconnecting the discharge circuit to play the role of short circuit protection. The current collecting module 32 and the voltage collecting module 33 are both connected to the lithium ion battery 1, thereby monitoring the current and voltage status of the lithium ion battery 1, and the cooperation of the intelligent processor 31 with the current collecting module 32 and the voltage collecting module 33 prevents the lithium ion battery 1 from over-voltage, under-voltage, over-current, short circuit, etc., and realizes the intelligent control of the operating status of the lithium ion battery 1.

[0163] The battery protection device 3 is provided on the control main board 2, so that when the lithium ion battery 1 needs to be disassembled, the lithium ion battery 1 can be directly removed from the portable fan 100 and reassembled or replaced, which reduces the disassembly and installation work between the battery protection device 3 and the lithium ion battery 1 and makes it easier to inspect and replace the lithium ion battery 1.

[0164] 101 to 102, the control main board 2 is provided with a power module 4. The pins P- and P+ of the battery protection device 3 are respectively connected to the pins of the power module 4, so that the current collection module 32 and the voltage collection module 33 are both connected to the power module 4 and monitor the current and voltage of the power module 4. Specifically, the power module 4 includes a charging interface 41. In this embodiment, the charging interface 41 is a TYPE-C female end. Of course, in other embodiments, the charging interface 41 may be other connection ports. During charging, its pins VBUS and GND are respectively connected to the pins P- and P+ of the battery protection device 3, and an energized TYPE-C male terminal is inserted into the charging interface 41 to realize the charging interface 41 to obtain power from the outside. The charging interface 41 supplies power to the battery protection device 3 through the pins VBUS and GND, and the energized battery protection device 3 charges the lithium-ion battery 1 through its pins B- and B+. During discharging, the charged lithium ion battery 1 supplies power to the control main board 2 via pins P- and P+ of the battery protection device 3, eliminating the need for additional wiring for the lithium ion battery 1 to be connected to the control main board 2 to receive power, simplifying the circuit configuration of the portable fan 100. The control main board 2 is provided with the switch 7 and a motor (not shown, the same applies below), and the switch 7 is exposed to facilitate user operation. Only when the switch 7 is closed can the lithium ion battery 1 supply power to the motor of the control main board 2, and the motor drives and rotates the fan assembly 6 to start the portable fan 100, and otherwise the portable fan 100 cannot be started.

[0165] 103 and 104, in which wires between various components are also omitted. The portable fan 100 includes a housing 5, a fan assembly 6 accommodated in the housing 5, a lithium ion battery 1, a control main board 2, and a battery protection device 3. The housing 5 includes an air inlet portion 61 and an air outlet portion 62, and the housing 5 includes a first housing 51 and a second housing 52 that cooperate with each other. The lithium ion battery 1 is used to supply power to the portable fan 100. The fan assembly 6 rotates to take in air from the air inlet portion 16 and discharge air from the air outlet portion 62. The control main board 2 is used to control the portable fan 100, and the battery protection device 3 is used to protect the lithium ion battery 1. Note that the battery module 4 is not shown in FIG. 104. It is understood that the battery module 4 can also be arranged on the control main board 2. Other configurations and functions of this embodiment are similar to those of the first embodiment, and will not be described again here.

[0166] Of course, the portable fan 100 is not limited to being a portable fan, and the portable fan 100 in other application scenarios also falls within the scope of the present application.

[0167] In summary, the portable fan 100 provided by the present application has the following beneficial effects:

[0168] The battery protection device 3 is provided on the control main board 2, so that when it is necessary to disassemble the lithium ion battery 1, the lithium ion battery 1 can be directly removed from the portable fan 100 and reassembled or replaced, which reduces the disassembly and installation work between the battery protection device 3 and the lithium ion battery 1 and makes it easier to inspect and replace the lithium ion battery 1.

[0169] When the battery protection device 3 is electrically connected to the control main board 2, the battery protection device 3 can be integrated into the control main board 2, eliminating the need for wiring between the battery protection device 3 and the control main board 2, and improving space utilization.

[0170] After being charged, the lithium ion battery 1 supplies power to the control main board 2 via pins P- and P+ of the battery protection device 3, and there is no need to add wiring for the lithium ion battery 1 to be connected to the control main board 2 to supply power, and the circuit configuration of the portable fan 100 is simplified to supply power.

[0171] Example 12 As shown in Fig. 105 and Fig. 106, they are schematic diagrams of the first embodiment of the present application. The fan assembly 100 is a neck-mounted fan 3. The fan assembly 100 includes two exhaust members 1 arranged symmetrically. Each of the exhaust members 1 includes a housing 2, a fan 3 arranged in the housing, a motor 6, and a rotating shaft 4. The housing 2 includes an annular body 21 protruding from the housing 2, and the annular body 21 is hollow. The motor 6 drives the fan 3 to rotate, and the fan 3 rotates around the rotating shaft 4 to exhaust air. The rotating shaft 4 is inserted into the annular body 21 from a first end 211 of the annular body 21, thereby fixing the fan 3 to the annular body 21. The fan assembly 100 includes a seal member 5, which seals the second end of the annular body 21.

[0172] By disposing the sealing member 5, the second end 212 of the annular body 21 is sealed, thereby forming a relatively sealed environment between the rotating shaft 4 and the annular body 21, preventing the lubricant of the rotating shaft 4 from overflowing from the second end 212, and at the same time preventing external dust and impurities from entering the annular body 21 from the second end 212, which would dry out the lubricant and cause large friction on the rotating shaft 4, thereby allowing the rotating shaft 4 to continue to rotate stably and smoothly, and extending the life of the exhaust member 1. The lubricant may be a lubricating liquid, a lubricating oil, or any lubricating substance that can reduce the rotational friction of the rotating shaft.

[0173] In this embodiment, the fan 3 is a centrifugal fan 3. The housing 2 is formed with an air inlet 22, a cavity 23, an air duct 24, and an air outlet 25, which are sequentially connected to each other. The annular body 21 extends and protrudes toward the cavity 23. The fan 3, the motor 6, and the rotating shaft 4 are housed in the cavity 23. The housing 2 is provided with two opposing air inlets 22 corresponding to two opposing intake negative pressure regions of the fan 3. When the fan 3 rotates, the wind from the air inlet 22 passes through the air duct 24 and is blown out from the air outlet 25.

[0174] When the rotating shaft 4 is inserted into the annular body 21, an oil reservoir 213 is formed between the rotating shaft 4 and the seal member 5. The oil reservoir 213 is used to store lubricating oil. The lubricant contained in the rotating shaft 4 itself is inevitably consumed in part during the rotation process, but by providing the oil reservoir 213 for storing lubricating oil, the lubricant can be replenished to the rotating shaft 4 in a timely manner, and the smooth rotation of the rotating shaft 4 can be ensured. At least a part of the oil reservoir 213 is radially enlarged in the direction toward the second end 212, so that more lubricant can be stored, and it is ensured that the rotating shaft 4 is maintained in a lubricated state for a long period of time.

[0175] In this embodiment, the end face of the second end 212 is recessed with respect to the surface of the housing 2 to form a recess 2121. The seal member 5 is disposed in the recess 2121. The surface of the seal member 5 is flush with the surface of the housing 2. The material of the seal member 5 is PE material, the cost of the PE material is low, and an adhesive is formed on the seal member 5 of the PE material, which allows the seal member 5 to be firmly attached to the recess 2121, and the assembly is also easy. The thickness of the seal member 5 is 0.05mm to 0.3mm, which is suitable for the use of the fan assembly 100, avoids wear, is light and thin, facilitates assembly, avoids the need for alignment and engagement processes in the prior art, and improves assembly efficiency. The surface of the seal member 5 is flush with the surface of the housing 2, making the overall appearance more beautiful. Of course, in other embodiments, the surface of the seal member 5 may be recessed relative to the surface of the housing 2, or may protrude relative to the surface of the housing 2, or the surface of the second end 212 may protrude relative to the surface of the housing 2, and the seal member 5 is provided on the end face of the second end 212. The thickness of the seal member 5 is not limited to 0.05 mm to 0.3 mm as long as it can seal the end face of the second end 212. Note that the method of fixing the seal member 5 to the second end 212 is not limited to adhesion, and other fixing methods may be used.

[0176] The fan assembly 100 also includes a bearing 7. The bearing 7 is disposed radially between the rotating shaft 4 and the annular body 21, and is used to fix the rotating shaft 4 to the annular body 21, and the rotating shaft 4 rotates within the bearing 7. The bearing 7 is disposed to reduce friction between the rotating shaft 4 and the annular body 21, and at the same time, the rotating shaft 4 can be more firmly fixed to the annular body 21. A lubricant is filled between the rotating shaft 4 and the bearing 7, and is used to reduce the friction force of the rotating shaft 4 against the bearing 7 during high-speed driving, thereby achieving the purpose of reducing the vibration of the rotating shaft 4. As a result, the rotation of the rotating shaft 4 is smooth and stable, the operating noise is very low, and the bearing wear is also small.

[0177] The fan assembly 100 also includes two oil rings 8. The two oil rings 8 are provided on both axial sides of the connection between the rotating shaft 4 and the bearing 7, respectively, and are used to seal and maintain the gap between the rotating shaft 4 and the bearing 7, thereby ensuring that the rotating shaft 4 continues to rotate stably and smoothly.

[0178] The fan assembly 100 also includes a snap ring 9. The annular body 21 is hollow, and the second end 212 is connected to the outside. The snap ring 9 can enter the annular body 21 from the second end 212, and the snap ring 9 is engaged with a locking groove of the rotating shaft 4. The annular body 21 is provided with a stopper 214 protruding inward, and the outer diameter of the snap ring 9 is larger than the inner diameter of the stopper 214, thereby preventing the rotating shaft 4 from coming off the annular body 21. The snap ring 9 can also prevent the oil ring 8 from coming off the rotating shaft 4. The snap ring 9 and the stopper 214 have a gap through which oil can flow in the axial direction, that is, the lubricant in the oil reservoir 213 can flow into the rotating shaft 4, the bearing 7, and the annular body 21 from the axial gap between the snap ring 9 and the stopper 214, and lubricating oil can be supplied in a timely manner. At the same time, at least a portion of the oil reservoir 213 is expanded in the radial direction, making it easier to assemble the snap ring 9 from the second end 212 to the rotating shaft 4.

[0179] The fan 3 includes a hub 31 and fan blades 32 connected to the hub 31. The rotating shaft 4 is fixedly connected to the hub 31. A method for fixing the rotating shaft 4 to the hub 31 is not particularly limited, and may be one or more of fastening methods such as threads, screws, buckles, etc. When the rotating shaft 4 is inserted into the annular body 21, the receiving portion 311 is formed between the hub 31 and the housing 2, and the receiving portion 311 is used to receive the motor 6.

[0180] As shown in Fig. 107 and Fig. 108, they are schematic diagrams of the second embodiment of the present application. The main differences from the first embodiment are as follows. The fan assembly 100 is a hand-held fan 3, and the fan assembly 100 includes one exhaust member 1. The fan 3 is a mixed flow fan 3. The housing 2 is provided with the air inlet 22 corresponding to the fan 3. When the fan 3 rotates, the wind from the air inlet 22 passes through the air duct 24 and is blown out from the air outlet 25. The outer diameter of the snap ring 9 is equal to or smaller than the inner diameter of the stopper 214, and the function of the snap ring 9 is only to prevent the oil ring 8 from coming off the rotating shaft 4.

[0181] As shown in Fig. 109 and Fig. 110, they are schematic diagrams of the third embodiment of the present application. The main differences from the first embodiment are as follows. The fan assembly 100 is a desk fan 3, and the fan assembly 100 includes one of the exhaust members 1. The fan 3 is an axial fan 3. The housing 2 is provided with the air inlet 22 corresponding to the fan 3. When the fan 3 rotates, the wind from the air inlet 22 passes through the air duct 24 and is blown out from the air outlet 25. The outer surface of the sealing member 5 is not flush with the surface of the housing 2, and a protective cover (without a label) is provided outside the sealing member 5, thereby further strengthening the fixing of the sealing member 5. The outer diameter of the snap ring 9 is larger than the inner diameter of the stopper 214, and the function of the snap ring 9 is only to prevent the oil ring 8 from coming off the rotating shaft 4.

[0182] In addition to the specific embodiments listed above, it should be understood that the present application is not limited to the above embodiments. Specifically, the fan assembly 100 may be any of various types of fan assemblies 100, such as a neck fan 3, a handheld fan 3, a desk fan 3, a stand fan 3, and a ceiling fan. The number of the exhaust member 1 may be one or more. The fan 3 may be any one of a centrifugal fan 3, a cross-flow fan 3, an axial fan 3, and a cross-flow fan 3. As long as the seal member 5 seals the second end 212 of the annular body 21, it can ensure that the rotating shaft 4 maintains sufficient lubricant in the annular body 21, and the rotating shaft 4 maintains sufficient lubrication, so that the rotating shaft 4 can continue to rotate stably and smoothly, and the life of the exhaust member 1 and the fan assembly 100 is extended.

[0183] Example 13 111 to 120, in order to solve the above problems, according to one aspect of the present application, a fan is provided in an embodiment of the present application. The fan includes a housing 10. The housing 10 includes the connection part 11 and a neck side part 12 connected to both sides of the connection part 11. The connection part 11 and the two neck side parts 12 surround each other to form a neck hanging space 13. The connection part 11 and / or the neck side part 12 are provided with an electric exhaust part 20. Each electric exhaust part 20 is used to blow air in the direction of the neck hanging space 13. The fan provided in this embodiment is provided with two neck measuring parts on both sides of the connection part 11, so that the connection part 11 and the two neck side parts 12 jointly surround each other to form the neck hanging space 13, and the user hangs the fan provided in this embodiment on his / her body through the neck hanging space 13, thereby effectively freeing the user's hands. At the same time, by providing the electric exhaust section 20 at the connection section 11 and / or at least one neck section 12, the fan provided in this embodiment can blow air into the neck space 13, so that the user can have a good cooling experience.

[0184] Currently available portable fans on the market are driven by single-phase motors, which have low wind power and poor cooling effect, and cannot provide users with a good user experience.

[0185] 113 to 120, in order to solve the above problems, the electric exhaust unit 20 of this embodiment includes a positioning protrusion 21, a rotating blade 22, and a three-phase motor drive assembly 23 drivingly connected to the rotating blade 22. The three-phase motor drive assembly 23 includes a stator 231 and a rotor 232 sleeved on the outside of the stator 231. The rotor 232 is fixedly installed on the rotating blade 22 and arranged coaxially with the rotating blade 22. The stator 231 is fixedly sleeved on the positioning protrusion 21. The three-phase motor drive assembly 23 is used to drive the rotating blade 22 provided in this embodiment, so that the electric exhaust unit 20 provided by the present application can output a larger wind force to the neck hanging space 13, and effectively improve the cooling experience of the user.

[0186] 113 to 115, in a specific embodiment, the connection part 11 of the present embodiment is provided with an electric exhaust part 20, and the connection part 11 is provided with a first air guide cavity 111. The first air outlet 112 faces the direction of the neck hanging space 13. A positioning protrusion 21 is provided in the first air guide cavity 111. The rotating blade 22 is rotatably installed in the first air guide cavity 111 and is used to blow air to the first air outlet 112.

[0187] In a preferred embodiment, the rotating blade provided herein is a radial fan.

[0188] 111 to 115, in a specific embodiment, in order for the fan provided in this embodiment to effectively blow air into the neck-hanging space 13, the connection part 11 of this embodiment is provided with a first air inlet 113 communicating with the first air guide cavity 111. The first air inlet 113 faces the end of the rotating blade 22, and the first air outlet 112 faces the side of the rotating blade 22. The connection part 11 of this embodiment is provided with the first air inlet 113 facing the end of the rotating blade 22 and the first air outlet 112 arranged facing the rotating blade 22, so that the fan provided in this embodiment can effectively blow outside air into the neck-hanging space 13, thereby allowing the user to obtain a better cooling effect.

[0189] 117 to 120, in a specific embodiment, the rotating blade 22 of the present embodiment is provided with a fixing hole 221. The axis of the fixing hole 221 is on the same line as the axis of the rotating blade 22. The electrical exhaust unit 20 includes a rotating shaft 24, a first end of which is inserted and fixed in the fixing hole 221, and a positioning hole 211 is provided inside the positioning protrusion 21, and the axis of the positioning hole 211 is on the same line as the axis of the rotating shaft 24. The second end of the rotating shaft 24 is rotatably inserted into the positioning hole 211.

[0190] 113 to 115, in order to improve the cooling effect of the fan provided in this embodiment, a plurality of first air guide ribs 114 are provided on the connection part 11 in this embodiment, and the plurality of first air guide ribs 114 surround the connection part 11 to form a first air guide cavity 111. There are a plurality of first air outlets 112. The plurality of first air outlets 112 are installed at intervals along the extension direction of the connection part 11. An end of the first air guide cavity 111 is connected to the plurality of first air outlets 112. By arranging a plurality of first air outlets 112 provided in this embodiment and arranging the plurality of first air outlets 112 at intervals along the extension direction of the connection portion 11, the end of the first air guide cavity 111 is simultaneously connected to the plurality of first air outlets 112, and through the action of the electrical exhaust portion 20, the air in the guide cavity is evenly sent out from the plurality of first air outlets 112 to the neck hanging space 13, thereby effectively improving the cooling effect of the fan provided in this embodiment.

[0191] 117 to 120, the rotating blade 22 provided in this embodiment is driven by a relatively high-speed three-phase motor assembly, and in order to avoid rapid wear between the rotating shaft 24 and the positioning hole 211 due to high-speed rotation and ensure the service life of the fan provided in this embodiment, at least one electric exhaust part 20 in this embodiment includes a bearing part 25. The outer ring of the bearing part 25 is fixed in the positioning hole 211, and the inner ring of the bearing part 25 is sleeved on the second end of the rotating shaft 24, and by fixing the outer ring of the bearing part 25 provided in this embodiment to the positioning hole 211, the inner ring is sleeved on the second end of the rotating shaft 24, so that the friction between the positioning hole 211 and the rotating shaft 24 can be converted from sliding friction to friction inside the bearing part 25, and the wear of the positioning hole 211 and the rotating shaft 24 can be effectively prevented, and the service life of the electric exhaust part 20 provided in this embodiment can be effectively improved.

[0192] 117 and 118, in a specific embodiment, the bearing unit 25 includes a rolling bearing 251, and the electrical exhaust unit 20 also includes a limiting member 26. The limiting member 26 is installed at the second end of the rotating shaft 24. The bearing unit 25 is located between the limiting member 26 and the first end of the rotating shaft 24, and an inner flange 2111 is provided on the inner wall of the positioning hole 211. The inner flange 2111 is installed between two adjacent bearing units 25, so that the two adjacent bearing units 25 are installed at a distance. The inner and outer rings of the rolling bearing 251 provided in this embodiment can be effectively positioned through the limiting member 26 installed at the second end of the rotating shaft 24 provided in this embodiment and the inner flange 2111 provided on the inner wall of the positioning hole 211, so that the rolling bearing 251 provided in this embodiment can be effectively mounted.

[0193] In a preferred embodiment, the electrical exhaust unit 20 provided in this embodiment further includes an elastic member. The elastic member provided in this embodiment is disposed between the rolling bearing 251 close to the rotating blade 22 and the rotating blade 22, and is sleeved on the rotating shaft 24. Both ends of the elastic member provided in this embodiment are respectively abutted against the inner ring of the rolling bearing 251 and the rotating blade 22, and apply an elastic force to the inner ring of the rolling bearing 251 in the direction away from the air outlet. The elastic member provided in this embodiment can pre-tighten the rolling bearing 251, thereby effectively extending the service life of the rolling bearing 251.

[0194] In a preferred embodiment, the bearing portion 25 provided in this embodiment is a ball bearing, and the ball bearing provided in this embodiment is provided with lubricant.

[0195] In a preferred embodiment, the bearing portion 25 provided in this embodiment is a ceramic bearing, and lubricant is installed in the ceramic bearing provided in this embodiment.

[0196] In a preferred embodiment, the bearing portion 25 provided in this embodiment is a magnetic levitation bearing.

[0197] 119 and 120, in another embodiment, the bearing part 25 includes a plain bearing 252, and the electrical exhaust part 20 includes two seal rings 27. The two seal rings 27 are sleeved on the rotating shaft 24 and arranged on both sides of the plain bearing 252, respectively. The plain bearing 252 installed in this embodiment is arranged between the rotating shaft 24 and the positioning hole 211, and the inner ring of the plain bearing 252 is fixedly connected to the second end of the rotating shaft 24, and the outer ring is fixedly connected to the positioning hole 211, so that the friction between the rotating shaft 24 and the positioning hole 211 can be converted into friction between the inner ring and the outer ring of the plain bearing 252, and the wear of the rotating shaft 24 and the positioning hole 211 can be effectively avoided, thereby improving the service life of the fan provided by this embodiment.

[0198] In a preferred embodiment, the sliding bearing 252 provided in this embodiment is provided with lubricating oil. The seal rings 27 provided in this embodiment are sleeved on the rotating shaft 24 and disposed on both sides of the sliding bearing 252, and are used to seal the lubricating oil.

[0199] 116 to 120, in a specific embodiment, the two neck side sections 12 of this embodiment are both installed with an electric exhaust section 20, and a second air guiding cavity 121 is provided in the neck side section 12. The neck side section 12 is provided with a second air outlet 122 connected to the second air guiding cavity 121. The second air outlet 122 faces the direction of the neck hanging space 13, a positioning boss 21 is provided in the second air guiding cavity 121, and a rotating blade 22 is rotatably installed in the second air guiding cavity 121 and used to blow air into the second air outlet 122.

[0200] 117 to 120, in a specific embodiment, the neck side portion 12 of the present embodiment is provided with a second air inlet 123 communicating with the second air guide cavity 121. The second air inlet 123 faces the end of the rotating blade 22. The second air outlet 122 faces the side of the rotating blade 22.

[0201] In a preferred embodiment, a plurality of second air outlets 122 are provided in this embodiment. The plurality of second air outlets are disposed at intervals along the extension direction of the neck side portion 12.

[0202] In an optional embodiment, an electrical exhaust section 20 is provided on one of the two neck side sections 12 provided in this embodiment, and a bearing section 25 is provided on the electrical exhaust section 20 provided in this embodiment.

[0203] In an optional embodiment, an electrical exhaust portion 20 is provided in the connection portion 11 and one of the two neck side portions 12 provided in this embodiment, and a bearing portion 25 is provided in the electrical exhaust portion 20 provided in this embodiment.

[0204] In an optional embodiment, an electrical exhaust portion 20 is provided in both the connection portion 11 and the two neck side portions 12 provided in this embodiment, and a bearing portion 25 is provided in the electrical exhaust portion 20 provided in this embodiment.

[0205] 112 and 116, in order to allow the fan provided in this embodiment to operate without being connected to an external power source, the fan of this embodiment also includes a power supply unit 30, which is attached in the housing 10. The power supply unit 30 is electrically connected to each electrical exhaust unit 20. The housing 10 is provided with a charging port 14, which is electrically connected to the power supply unit 30. By disposing the power supply unit 30 in the housing 10 provided in this embodiment and electrically connecting the power supply unit 30 to each electrical exhaust unit 20, the fan provided in this embodiment can blow air without being connected to an external power source, improving the versatility of the fan according to this embodiment, and by providing the charging port 14 electrically connected to the power supply unit 30 in the housing 10 according to this embodiment, the power supply unit 30 according to this embodiment can be connected to an external power source via the charging port 14, thereby realizing the power supply unit 30 being charged.

[0206] In a preferred embodiment, the power supply 30 provided in this embodiment is a battery.

[0207] In a preferred embodiment, at least one of the first air inlet and the first air outlet provided in this embodiment is provided with a filter, which can effectively prevent foreign matter from the external environment from entering the fan according to this embodiment.

[0208] In a preferred embodiment, at least one of the second air inlet and the second air outlet provided in this embodiment is provided with a filter, which can effectively prevent foreign matter from the external environment from entering the fan according to this embodiment.

[0209] In a preferred embodiment, the fan provided in the present embodiment further includes a gel container, and the gel container is detachably provided in the first air guide cavity and / or the second air guide cavity provided in the present embodiment. The gel container provided in the present embodiment is used to store a gel-type air freshener, and by disposing the gel-type air freshener in the gel container provided in the present embodiment, the air blown by the fan provided in the present embodiment is scented, providing a better experience to the customer.

[0210] In a preferred embodiment, the gel-containing portion provided in this embodiment includes a box body and a cover assembly attached to the box body, the box body provided in this embodiment is removably attached to the first air guide cavity, and the box body provided in this embodiment is provided with a containing cavity, which is used to contain a gel-type air freshener. The cover assembly provided in this embodiment includes a first cover plate and a second cover plate. The first cover plate provided in this embodiment is removably attached to the box body, and the second cover plate provided in this embodiment is pivotally connected to the first cover plate. The first cover plate provided in this embodiment has a first opening, the second cover plate provided in this embodiment has a second opening, and the second cover plate provided in this embodiment has a blocking state in which the first opening is completely blocked and an opening state in which the first opening and the second opening overlap, and the second cover can be switched between the blocking state and the opening state by rotating the second cover.

[0211] In summary, the implementation of the fan provided by this embodiment has at least the following advantageous technical effects: The fan provided by this embodiment has two neck measuring parts on both sides of the connection part 11, so that the connection part 11 and the two neck parts 12 can be surrounded together to form a neck hanging space 13, so that the user can hang the fan provided by this embodiment on the body through the neck hanging space 13, effectively freeing the user's hands; at the same time, the electric exhaust part 20 is arranged on the connection part 11 and / or at least one neck part 12, so that the fan provided by this embodiment can blow air into the neck hanging space 13, and the user can get a good cooling experience.

[0212] The above detailed description is only a description of the preferred embodiments of the present application, and does not limit the patent scope of the present application. Therefore, any equivalent technical modifications made using the specification and figures of the present application should be included within the protection scope of the present application.

Claims

1. A portable fan including a housing, a fan assembly, and an anion module, The housing is provided with an air inlet, a receiving cavity, an air duct, and an air outlet, which are connected in sequence, and the housing includes a first side wall having the air outlet; the fan assembly is accommodated in the accommodation cavity and is used to blow air from the air inlet through the air duct to the air outlet; a negative ion module is installed within the housing, the negative ion module including a negative ion generator, a positive electrode emission part, and a negative electrode emission part; when the negative ion generator is activated, a discharge occurs between the positive electrode emission part and the negative electrode emission part, the air is ionized, negative ions are generated, and the negative ions are discharged from the housing.

2. the portable fan includes a partition assembly, the partition assembly including a vertical plate, a first horizontal plate, and a second horizontal plate, the vertical plate 31, the first horizontal plate 32, the second horizontal plate 34, and an inner wall of the housing collectively form the receiving cavity and the air duct, a first space is formed between the first horizontal plate and the inner wall of the housing, the negative ion module is disposed in the first space, a groove 122 is exposed to the outside at a position of the housing corresponding to the first space, the groove 122 is formed with a first outlet and a second outlet communicating the first space with the outside, the first outlet is provided with the negative electrode outlet, and the second outlet is provided with the positive electrode outlet, or A first space is formed between the first horizontal plate and the inner wall of the housing, the negative ion module is disposed in the first space, both the positive electrode emission part and the negative electrode emission part are accommodated in the first space, the housing is formed with a first emission port communicating the first space with the outside world, and the negative electrode emission part is provided in the first emission port, or The first horizontal plate has a first through hole communicating the air duct and the first space, and a part of the wind generated by the fan assembly is blown into the first space through the first through hole, or the first horizontal plate does not have a first through hole communicating the air duct and the first space, or a first space is formed between the first horizontal plate and an inner wall of the housing, the negative electrode emission portion is accommodated in the first space, the first horizontal plate is provided with a first through hole communicating the air duct with the first space, the negative electrode emission portion is disposed corresponding to the first through hole, a second space is formed between the second horizontal plate and the housing, the positive electrode emission portion is accommodated in the second space, the second horizontal plate is provided with a second through hole communicating the air duct with the second space, and the positive electrode emission portion is disposed corresponding to the second through hole, or The first through hole and the second through hole are arranged to be shifted forward and backward, and the positive electrode emission portion and the negative electrode emission portion are arranged to be shifted forward and backward, or The housing is provided with a first outlet communicating the first space with the outside, and the negative electrode outlet is disposed adjacent to the first outlet, and a part of the wind generated by the fan assembly passes through the first through hole and enters the first space, and a part of the negative ions is blown out from the air outlet, or The housing includes a first part, a second part, and a third part pivotally connecting the first part and the second part, the first part and the second part are arranged symmetrically, the first part, the second part, and the third part are provided with the air inlet, the storage cavity, the air duct, and the air outlet, all of which are connected in sequence, and the fan assembly is provided corresponding to each of the storage cavities; or The portable fan of claim 1, characterized in that the accommodating cavities of the first and second parts are provided at free ends, the accommodating cavity of the third part is provided at a central part, one air duct is provided on each side of the accommodating cavity of the third part, and the negative ion module is provided in both the first and second parts.

3. the portable fan includes a bulkhead assembly, the bulkhead assembly including a vertical plate, a first horizontal plate, and a second horizontal plate, the vertical plate, the first horizontal plate, the second horizontal plate, and an inner wall of the housing collectively defining the receiving cavity and the air duct; wherein the first horizontal plate includes a baffle extending vertically and abutting against the second horizontal plate, the baffle being disposed between the accommodating cavity and the air duct, one end of the baffle abutting against the first side wall, an exhaust port being formed between the other end of the baffle and the vertical plate, wind generated by the fan assembly enters the air duct through the exhaust port, and the air outlet is provided in a projection area of ​​the baffle on the first side wall; and the first horizontal plate includes a first flat plate portion located in the receiving cavity, and a first inclined surface, a second inclined surface and a second flat plate portion located in the air duct, the second inclined surface is connected to the first inclined surface and the second flat plate portion at the same time, the second inclined surface is adjacent to the air outlet, and the baffle is located between the first flat plate portion and the second inclined surface, or the baffle includes an arcuate portion located at a free end, the end of the arcuate portion being located on the second inclined surface, and the inner diameter of the arcuate portion is between 0.25 mm and 1.25 mm; or the housing includes a second side wall facing the neck of the human body and a third side wall 115 away from the neck of the human body, the air inlet is provided on both the second side wall and the third side wall corresponding to the fan assembly, a negative ion chamber is formed between the first horizontal plate and the second side wall, an outlet is provided on the first side wall communicating with the negative ion chamber, a negative ion generator is provided in the housing, an outlet end of the negative ion generator faces the outlet, and the outlet and the air outlet are arranged adjacent to each other, or a through hole communicating with the negative ion chamber is provided in the first horizontal plate, and a part of the wind generated by the fan assembly is blown through the through hole toward the discharge end of the negative ion generator and finally blown out from the discharge port; or A light strip is embedded in the third side wall, the light strip extends along the same direction as the third side wall, the air inlets of the third side wall are provided on both sides of the light strip, and a filter member is provided on the second horizontal plate toward the air inlets of the third side wall. The filter member has a plurality of small holes formed therein, or The housing includes a first portion, a second portion, and a third portion pivotally connecting the first portion and the second portion, the first portion and the second portion being symmetrically arranged, the first portion, the second portion, and the third portion being provided with the air inlet, the storage cavity, the air duct, and the air outlet, which are all sequentially connected to each other, and the fan assembly is provided corresponding to each of the storage cavities; or The accommodating cavities of the first and second parts are provided at their free ends, the accommodating cavity of the third part is provided at a central part, and one air duct is provided on each side of the accommodating cavity of the third part, or The housing includes a second side wall facing the neck of the human body, the third portion is provided with a support portion facing the back of the neck of the human body, the support portion is provided with a first notch, the second side wall of the third portion is provided with a logo portion at a center thereof, the logo portion is exposed from the first notch, and the support portion is provided with a second notch parallel to the air outlet, or The portable fan according to claim 1 , wherein the air inlet is provided around the entire periphery of the logo portion, and a portion of the air inlet is exposed through the first cutout.

4. the housing includes a first side wall facing the neck of the human body and a second side wall away from the neck of the human body, the second side wall including a main wall and an auxiliary wall, the main wall and the auxiliary wall being arranged in a stepped manner, the air inlet being formed between the main wall and the auxiliary wall; and the air inlets include a first air inlet located in the first side wall and a second air inlet located in the second side wall, the second air inlet being formed between the main wall and the auxiliary wall; or The housing includes two symmetrically arranged clamp arms, the two clamp arms being rotatably connected via a rotating connector; or Each of the clamp arms is provided with the air inlet, the storage cavity, the air duct and the air outlet, which are in communication with each other, and each of the storage cavities is provided with the fan assembly; or Each of the clamp arms is provided with the first air inlet and the second air inlet corresponding to each of the fan assemblies; or The pivot angle range of each of the clamp arms is ±10°; or The main wall is longer than the auxiliary wall, and when the portable fan is attached to a human body, the main wall is located above the auxiliary wall; or When the portable fan is worn on a human body, the auxiliary wall is located radially inside the main wall; or a cover plate having a through hole between the second air inlet and the fan assembly; or 2. The portable fan of claim 1, further comprising a partition assembly separating the interconnected storage cavity and the air duct from other spaces within the housing, the width of the end of the air duct away from the storage cavity being smaller than the width of the end of the air duct closer to the storage cavity to provide space for accommodating a battery.

5. The housing includes a centrally located rear neck portion, a support member, and a pad; The receiving cavity is provided in the rear neck portion, and the rear neck portion is provided with an attachment portion facing the rear neck of the human body in correspondence with the position of the receiving cavity; The support member is attached to the attachment portion and is used to support a posterior neck region of a human body; The pad is disposed on the mounting portion and abuts against the support member, the pad having elastic deformation capability; and The support member includes a contact portion and a connecting member, the connecting member includes a first blending portion that blends with the contact portion and a second blending portion that blends with the mounting portion, the number of the second blending portions is two, when the two second blending portions are pressed, the two second blending portions approach each other and enter or leave the mounting portion, when the two second blending portions are loosened, the second blending portion is fixed to the mounting portion or detached from the mounting portion, or The mounting portion has a mounting chamber, the second compounding portion has a hook portion that enters the mounting chamber and hooks the mounting chamber, the pad is abutted against the hook portion, and the height of both the hook portion and the pad is equal to or greater than the height of the mounting chamber, or There is a gap between the surface of the first blending portion facing the mounting portion and the mounting portion, the material of the pad is a silicone material, the compression amount of the pad is 15% to 25%, and the material of the support member is a silicone material, or The housing includes a first side wall facing the neck of the human body and a second side wall away from the neck of the human body, the first side wall being provided with an attachment portion; or The housing includes two symmetrically arranged clamp arms, the two clamp arms being rotatably connected via a rotating connector, and each clamp arm has a pivot angle range of ±10°; or The portable fan is provided with two support members corresponding to the two clamp arms, and when the two clamp arms are pivoted, the two support members fit on a human neck, respectively; or Each of the clamp arms is provided with the air inlet, the accommodating cavity, the air duct, and the air outlet, which are in communication with one another, and each of the clamp arms includes a first air inlet located on the first side wall and a second air inlet located on the second side wall corresponding to each of the fan assemblies, and there is a gap between at least a portion of the support member and the first air inlet; or The support member includes a contact portion and a connecting member, the contact portion 21 has a through hole corresponding to the first air inlet, the second side wall includes a main wall and an auxiliary wall, the main wall and the auxiliary wall are arranged in a stepped manner, and the second air inlet is formed between the main wall and the auxiliary wall, or 2. The portable fan of claim 1, further comprising a partition assembly separating the communicating storage cavity and the air duct from other spaces within the housing, the partition assembly including a width of an end of the air duct away from the storage cavity that is smaller than a width of an end of the air duct close to the storage cavity to provide space for accommodating a battery.

6. The portable fan further includes a fan drive circuit, the fan drive circuit including a main control circuit, a three-phase drive circuit, and a back electromotive force detection circuit; The three-phase driving circuit includes at least three signal input terminals and three driving signal output terminals, the at least three signal input terminals are respectively electrically connected to the main control circuit to receive control signals, and the three driving signal output terminals are respectively electrically connected to three signal terminals of a DC brushless fan motor to respectively output three-phase driving signals for driving and rotating the DC brushless fan motor; and The back electromotive force detection circuit includes three detection branches, each of which includes a detection terminal and a detection output terminal electrically connected to the detection terminal, the three detection terminals of the three detection branches are electrically connected to the three detection output terminals, and the three detection output terminals of the three detection branches are respectively electrically connected to a main control circuit and are used to output a first detection signal, a second detection signal and a third detection signal to the main control circuit, respectively, so that the main control circuit obtains the phase of the three-phase driving signal according to the first detection signal, the second detection signal and the third detection signal, and adjusts the control signal; the detection branch includes a first detection resistor, a second detection resistor and a third detection resistor, the first detection resistor and the second detection resistor are connected in series, and one end of the first detection resistor remote from the second detection resistor is a detection terminal, one end of the second detection resistor remote from the first detection resistor is grounded, and a node between the first detection resistor and the second detection resistor is the detection output terminal; or the three-phase driving circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor and a ninth transistor, a first conduction terminal of the first transistor, the second transistor and the third transistor are all connected to a power supply terminal, a first conduction terminal of the fourth transistor is connected to the power supply terminal, a first conduction terminal of the fifth transistor is connected to the power supply terminal, a first conduction terminal of the sixth transistor is connected to the power supply terminal, control terminals of the fourth transistor, the fifth transistor and the sixth transistor are electrically connected to the main control circuit respectively, control terminals of the seventh transistor, the eighth transistor and the ninth transistor are electrically connected to the control terminals of the fourth transistor, the fifth transistor and the sixth transistor respectively and are used for receiving control signals, second conduction terminals of the fourth transistor, the fifth transistor and the sixth transistor are all grounded, a first conduction terminal of the seventh transistor is connected to the second conduction terminal of the first transistor a second conduction terminal of the seventh transistor is grounded, a first conduction terminal of the eighth transistor is connected to the second conduction terminal of the second transistor, the second conduction terminal of the eighth transistor is grounded, a first conduction terminal of the ninth transistor is connected to the second conduction terminal of the third transistor, and the second conduction terminal of the ninth transistor is grounded; a node between the first conduction terminal of the seventh transistor and the second conduction terminal of the first transistor, a node between the first conduction terminal of the eighth transistor and the second conduction terminal of the second transistor, and a node between the first conduction terminal of the ninth transistor and the second conduction terminal of the third transistor respectively function as three of the drive signal output terminals; the at least three signal input terminals are three PWM signal input terminals, and the control signal includes three PWM signals; the fan drive circuit includes a current detection circuit, and the second conduction terminals of the seventh transistor, the eighth transistor, and the ninth transistor are all grounded via the current detection circuit; the current detection circuit is electrically connected to the main control circuit, and the current detection circuit includes a sense resistor and a sense capacitor;The second conductive terminals of the seventh transistor, the eighth transistor and the ninth transistor are grounded in sequence via the sense resistor and the sense capacitor, and a node of the sense resistor and the sense capacitor is electrically connected to the main control circuit; or the three-phase driving circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, and a sixth transistor, a first conduction terminal of the first transistor, the second transistor, and the third transistor are connected to a power supply terminal, a first conduction terminal of the fourth transistor is connected to a second conduction terminal of the first transistor, a first conduction terminal of the fifth transistor is connected to a second conduction terminal of the second transistor, and a first conduction terminal of the sixth transistor is connected to a second conduction terminal of the third transistor, a node between the first conduction terminal of the fourth transistor and the second conduction terminal of the first transistor, a node between the first conduction terminal of the fifth transistor and the second conduction terminal of the second transistor, and a node between the first conduction terminal of the sixth transistor and the second conduction terminal of the third transistor are respectively used as three of the driving signal output terminals, and control terminals of the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are respectively electrically connected to the main control circuit and used to receive the control signals, and the control signals include six PWM signals; or the fan driving circuit includes a current detection circuit, a second conductive terminal of the sixth transistor is grounded via the current detection circuit, the current detection circuit is electrically connected to the main control circuit, the current detection circuit includes a sense resistor and a sense capacitor, the second conductive end of the sixth transistor is grounded via the sense resistor, the sense capacitor is connected in parallel with the sense resistor, a node between the sense resistor and the second conductive end of the sixth transistor is electrically connected to the main control circuit, the current detection circuit also includes a first series resistor, a second series resistor and a parallel resistor, the parallel resistor is connected in parallel with the sense resistor, the first series resistor is connected between one end of the sense capacitor and one end of the sense resistor, and the second series resistor is connected between the other end of the sense capacitor and the other end of the sense resistor; or The main control circuit includes a main control chip and three three-phase control chips, each of the three-phase control chips is electrically connected to the main control chip and the three-phase drive circuit; the fan drive circuit includes a voltage conversion circuit, the voltage conversion circuit is used to receive a battery voltage, convert the battery voltage into a drive voltage, and supply the drive voltage to the power terminals of the three three-phase control chips; the main control chip is used to output a main control signal to the three three-phase control chips, so that the three three-phase control chips respectively output the control signal to the three-phase drive circuit; the fan drive circuit includes a switch control circuit, the switch control circuit is electrically connected to a battery, the voltage conversion circuit and the main control circuit, and is used to control the operation of the voltage conversion circuit; the switch control circuit 2 includes a button, a first switch tube, The fan driving circuit further includes a second switch tube and a third switch tube, the two conductive terminals of the first switch tube are respectively connected to the positive pole of the battery and the input terminal of the voltage conversion circuit, the control terminal of the first switch tube is grounded through the two conductive terminals of the third switch tube, the positive pole of the battery is connected to the control terminal of the third switch tube through the two conductive terminals of the second switch tube and a unidirectional diode, the control terminal of the second switch tube is grounded through the button, the control terminal of the third switch tube is electrically connected to the main control circuit, and the node between the second switch tube and the unidirectional diode is electrically connected to a switch signal terminal of the main control circuit; the fan driving circuit further includes a DC conversion circuit, the DC conversion circuit is used to receive the driving voltage and convert it into another DC operating voltage; or the fan driving circuit includes a battery voltage detection circuit, the battery voltage detection circuit includes a second voltage dividing resistor and a third voltage dividing resistor connected in series, a node between the second voltage dividing resistor and the third voltage dividing resistor is electrically connected to the main control circuit; or the battery voltage detection circuit includes a filter capacitor and a sampling resistor connected in series, the sampling resistor is connected between the filter capacitor and ground, a node between the filter capacitor and the sampling resistor is electrically connected to the main control circuit, the fan driving circuit further includes a signal amplification circuit, the node between the filter capacitor and the sampling resistor is electrically connected to the main control circuit by the signal amplification circuit, the signal amplification circuit is used to amplify the signal of the node and provide the amplified signal to the main control circuit; or the fan driving circuit further includes a Hall detection circuit, the Hall detection circuit is electrically connected to the main control circuit, and is used to detect a magnetic field generated by the DC brushless fan motor and output a Hall detection signal to the main control circuit, so that the main control circuit obtains the rotor position of the DC brushless fan motor according to the Hall detection signal; the Hall detection circuit includes a motor temperature detection element, and the motor temperature detection element is connected between the Hall element of the Hall detection circuit and the main control circuit; the fan driving circuit includes a transistor temperature detection circuit, and the transistor temperature detection circuit includes a first voltage dividing resistor and a thermistor connected in series, the thermistor is used to sense the temperature of each transistor of the three-phase driving circuit, and a node between the first voltage dividing resistor and the thermistor is electrically connected to the main control circuit and is used to output a temperature signal, so that the main control circuit controls whether the fan driving circuit enters a temperature protection state according to the temperature signal; the thermistor is connected between the first voltage dividing resistor and ground, and the transistor temperature detection circuit includes a voltage stabilizing capacitor connected in parallel with the thermistor; or The main control circuit includes a main control chip and an auxiliary chip, the three-phase driving circuits, the back electromotive force detection circuit and the DC brushless fan motor are all two in number and are arranged in one-to-one correspondence, the main control chip is electrically connected to one of the three-phase driving circuits, thereby outputting the control signal to one of the three-phase driving circuits to drive the corresponding one of the DC brushless fan motors, the back electromotive force detection circuit is electrically connected to the corresponding one of the three-phase driving circuits, and outputs the corresponding first detection signal, the second detection signal and the third detection signal to the main control chip, thereby the main control chip detects the three-phase driving signal of one of the three-phase driving circuits.

2. The portable fan of claim 1 , wherein the auxiliary chip acquires a phase of the three-phase drive signal of one of the three-phase drive circuits and adjusts the control signal output to the one of the three-phase drive circuits; the auxiliary chip is electrically connected to the other of the three-phase drive circuits, thereby outputting the control signal to the other of the three-phase drive circuits to drive the corresponding other of the DC brushless fan motors; the other of the back electromotive force detection circuits is electrically connected to the corresponding three-phase drive circuits, and outputs corresponding the first detection signal, the second detection signal and the third detection signal to the auxiliary chip, thereby the auxiliary chip acquires a phase of the three-phase drive signal of the other of the three-phase drive circuits and adjusts the control signal output to the other of the three-phase drive circuits.

7. The portable fan further includes an axial tube disposed in the housing, a rotating shaft disposed in an axial hole of the axial tube and rotatable relative to the axial tube, a stator sleeved on the outside of the axial tube, and an impeller connected to the rotating shaft, the housing forms a surrounding mounting channel, the mounting channel is used for disassembling and assembling the impeller, a disassembly member is provided on the housing, the disassembly member is detachably connected to the housing, and a collision prevention element is provided on a bottom surface of the disassembly member facing the impeller to prevent the impeller from colliding with the disassembly member; and A collision prevention groove is formed in the center of the disassembly member toward the impeller, and the collision prevention element is provided in the collision prevention groove; or The material of the anti-collision element is an EVA material or a soft silicone material; or The collision prevention element is a cylinder, or One of the disassembly member and the housing is provided with a turnbuckle and / or a male screw and / or a first magnet; or A turnbuckle is provided on one of the disassembly member and the housing, and a turnbuckle groove is provided on the other, the turnbuckle groove has a first position and a second position for sliding the turnbuckle, the disassembly member and the housing rotate between a first alignment position and a second alignment position, the turnbuckle is inserted into the first position of the turnbuckle groove when the disassembly member and the housing are in the first alignment position, and the turnbuckle is slid into the second position of the turnbuckle groove to limit the axial relative displacement of the disassembly member and the housing when the disassembly member and the housing are in the second alignment position, or The disassembly member is provided with the turnbuckle groove, and the housing is provided with a turnbuckle, The disassembly member is provided with a first groove and a second groove along its diameter direction, the first groove and the second groove are mutually connected, a first position of the turnbuckle groove corresponds to a position of the first groove, a second position of the turnlock groove corresponds to a position of the second groove, and a first elastic buckle is provided protruding from the disassembly member into the second groove; The housing is provided with a third groove along its diameter direction, and a second elastic buckle is provided on the side of the third groove adjacent to the disassembly member, and the second elastic buckle is connected to the housing, and when the second elastic buckle slides from the first groove into the second groove, it limits the relative displacement of the disassembly member and the housing in the axial direction; or The disassembly member has a through hole in the center for a screw to pass through, and a decorative cover on the outside; or The distance between the surface of the anti-collision element and the impeller is 0.1 mm to 5 mm; or 2. The portable fan of claim 1, wherein the anti-collision element has a diameter of 1 mm to 20 mm.

8. The portable fan further includes a support member, the support member attached to a side of the housing facing the person's neck, the support member rotatably connected to the housing and / or connected via a bendable molding, and used to support the rear neck region of the person; and The housing includes a first side wall facing the neck of the human body and a second side wall away from the neck of the human body, a first blending portion protruding from the first side wall, a second blending portion corresponding to the support member, the second blending portion rotatably connected to the first blending portion, and the support member being rotatable relative to the first side wall; or The first blending part includes two pivot joints and an elastic arm located between the two pivot joints, and a protrusion is provided at the free end of the elastic arm; the second blending part includes a pivot column, and a surface of the pivot column is provided with a plurality of grooves, and both ends of the pivot column are rotatably connected to the two pivot joints; when the support member rotates, the protrusions are accommodated in different grooves, and are positioned at different angles when the support member rotates up and down; or The second blending section includes a mounting bracket, and the first blending section includes a fixed member fixed to the first side wall and a rotating ball connected to the fixed member through the mounting bracket, and the mounting bracket rotates relative to the rotating ball, thereby causing the support member to rotate relative to the rotating ball, or The housing includes two symmetrically arranged clamp arms, the two clamp arms being rotatably connected via a rotating connector, and the pivot angle range of each of the clamp arms is ±10°; or The portable fan is provided with two support members corresponding to the two clamp arms, and when the two clamp arms rotate, the two support members fit around a human neck, respectively; or Each of the clamp arms is provided with the air inlet, the storage cavity, the air duct, and the air outlet, which are in communication with each other; each of the clamp arms is provided with a first air inlet located on the first side wall and a second air inlet located on the second side wall corresponding to each of the fan assemblies; the storage cavity is located at one end where the two clamp arms are connected; the support member is disposed corresponding to the storage cavity; and a gap exists between at least a portion of the support member and the first air inlet; or The support member has a through hole corresponding to the first air inlet, the second side wall includes a main wall and an auxiliary wall, the main wall and the auxiliary wall are arranged in a stepped shape, and the second air inlet is formed between the main wall and the auxiliary wall, or the rotating connector includes a first connector and a second connector, the first connector is fixedly connected to one of the clamp arms and the second connector is fixedly connected to the other of the clamp arms, the first connector includes a first fixing portion and the second connector includes a second fixing portion, the first fixing portion and the second fixing portion are rotatably connected, the first fixing portion and the second fixing portion are both spindle-shaped, the first fixing portion includes a plurality of first pieces and the second fixing portion includes a plurality of second pieces, the plurality of first pieces and the plurality of second pieces are stacked in a crossed manner, or 2. The portable fan of claim 1, further comprising a partition assembly separating the interconnected storage cavity and the air duct from other spaces within the housing, the width of the end of the air duct away from the storage cavity being smaller than the width of the end of the air duct closer to the storage cavity to provide space for accommodating a battery.

9. the housing includes a clamp arm, the air inlet, the receiving cavity, the air duct, and the air outlet are provided in the clamp arm; the portable fan includes a rotation coupling structure, the rotation coupling structure includes a first hinge and a second hinge, the first hinge includes a plurality of first pieces arranged in parallel with a gap, the second hinge includes a plurality of second pieces arranged in parallel with a gap, the number of the clamp arms is two, the number of the fan assemblies is two correspondingly, the first hinge is fixed to one of the clamp arms, the second hinge is fixed to the other of the clamp arms, the first hinge and the second hinge are fixedly interlocked with each other, and the plurality of first pieces and the plurality of second pieces are cross-stacked, so that the two clamp arms can rotate relatively and maintain a spin-stop state when the rotation stops; the portable fan includes a pivot, the pivot passing through the first and second pieces cross-stacked to secure the first and second hinges; or A pivot portion is provided on one of the first hinge and the second hinge, and a pivot hole is provided on the other of the first hinge and the second hinge, and the pivot portion is fixed to the pivot hole, thereby fixing the first hinge and the second hinge, or The number of the corresponding pivot portions and the pivot holes is two, and the two pivot portions and the two pivot holes are provided on both sides of the first pieces and the second pieces, respectively; or The receiving cavity is located at one end of the clamp arm close to the rotating coupling structure, the receiving cavity receives the fan assembly, the air duct and the circuit compartment are provided in a direction from the receiving cavity toward the free end of the clamp arm, at least one of the circuit compartments receives a battery, the battery supplies power to the fan assembly, and the two fan assemblies operate simultaneously or independently, or The pivot angle range of the two clamp arms is ±10°; or 2. The portable fan of claim 1, wherein the first piece and the second piece have the same shape, both being irregular polygons, and the friction force between the first hinge and the second hinge when the free ends of the two clamp arms rotate to move apart is greater than the friction force between the first hinge and the second hinge when the free ends of the two clamp arms rotate to move closer together.

10. The portable fan includes an axial tube disposed in the housing, a rotating shaft disposed in an axial hole of the axial tube and rotatable relative to the axial tube, a stator sleeved on the outside of the axial tube, and an impeller connected to the rotating shaft, the portable fan includes a vibration-proof part attached to an end of the axial tube, the vibration-proof part being used to absorb vibrations caused by the impeller, and The housing is enclosed to form a mounting channel having an opening at one end, the mounting channel being used for disassembling and assembling the impeller, a turntable is provided at the opening of the housing, and the turntable is removably connected to the housing; One of the turntable and the housing is provided with a turnbuckle and / or a male screw and / or a first magnet, and the other of the turntable and the housing is provided with a turnbuckle and / or a female screw and / or a second magnet, or A turnbuckle is provided on one of the turntable and the housing, and a turnbuckle groove is provided on the other, the turnbuckle groove has a first position and a second position for sliding the turnbuckle, the turntable and the housing rotate between a first alignment position and a second alignment position, the turnbuckle is inserted into the first position of the turnbuckle groove when the turntable and the housing are in the first alignment position, and the turnbuckle is slid into the second position of the turnbuckle groove when the turntable and the housing are in the second alignment position so as to limit the relative axial displacement of the turntable and the housing, or The turntable is provided with the turnbuckle groove, and the housing is provided with a turnbuckle; The turntable is provided with a first groove and a second groove along a diameter direction thereof, the first groove and the second groove are mutually connected, a first position of the turnbuckle groove corresponds to a position of the first groove, a second position of the turnlock groove corresponds to a position of the second groove, and a first elastic buckle is provided protruding from the turntable into the second groove; The housing is provided with a third groove along its diameter direction, and a second elastic buckle is provided on a side of the third groove adjacent to the turntable, and the second elastic buckle is connected to the housing, and when the second elastic buckle slides from the first groove into the second groove, it limits the relative displacement of the turntable and the housing in the axial direction, or The inner diameter range of the vibration isolation component is 7 mm to 13 mm and the outer diameter range of the vibration isolation component is 17 mm to 40 mm, or The vibration-proofing part and the shaft tube are detachably connected, the vibration-proofing part and the housing are detachably connected, the shaft tube is connected to the housing via the vibration-proofing part, and the vibration-proofing part is an annular body, or The inner circumference of the annular body is engaged with the axial tube, a first protrusion is formed at an end of the axial tube and extends outward along a diameter direction, an inner groove is formed on the inner wall of the annular body, and the first protrusion is inserted into the inner groove, or The outer periphery of the annular body is engaged with the housing, an outer groove is formed on the outer wall of the annular body, a second protrusion is formed on the housing and engaged with the outer groove, and the second protrusion is inserted into the outer groove, or the material of the annular body is a soft material, and the annular body is deformable; The portable fan of claim 1, wherein the annular body has a thickness of 0.9 mm to 3 mm.

11. The housing includes two symmetrically disposed clamp arms; The fan assembly includes two of the fan assemblies, the two fan assemblies are installed on the two clamp arms and are installed corresponding to the rear neck portion; The portable fan includes a connecting member, to which the two clamp arms are pivotally connected, thereby adjusting a distance between free ends of the two clamp arms, where at an installation point between the connecting member and the clamp arms, the connecting member is formed with a first mating surface facing the clamp arms, and the clamp arms are formed with a second mating surface facing the connecting member, the first mating surface and the second mating surface are two parallel arc surfaces, vertical projections of the two second mating surfaces in a first direction form two arcs, a radius of the circle on which the two arcs are located is 7.5 mm to 9.5 mm, and a distance between two centers of the circle on which the two arcs are located is 15 mm to 26 mm, thereby limiting the distance between the two fan assemblies, increasing the intake area and heat dissipation area of ​​a rear neck portion, and avoiding turbulence of wind from the two fan assemblies; the second mating surface is a concave surface, the clamp arm has a protrusion, the protrusion protrudes from the second mating surface, the first mating surface is a convex surface, the connecting member has a locking groove, the locking groove is recessed from the first mating surface, a pivot passes through and connects the protrusion and the locking groove simultaneously, thereby stably connecting the protrusion and the locking groove, a volume of the locking groove is larger than a volume of the protrusion, and an inner wall of the locking groove limits the pivoting of the protrusion, or the first mating surface is a concave surface, the connecting member has a protrusion, the protrusion protrudes from the first mating surface, the second mating surface is a concave surface, the clamp arm has a locking groove, the locking groove is recessed from the second mating surface, a pivot passes through and connects the protrusion and the locking groove simultaneously in a first direction, thereby stably connecting the protrusion and the locking groove, a volume of the locking groove is larger than a volume of the protrusion, and an inner wall of the locking groove limits the pivoting of the protrusion, or A wiring groove is formed on the surface of the protruding portion, the wiring groove penetrates the second mating surface or the first mating surface, a wiring hole is formed in the locking groove, and the wiring groove and the wiring hole are connected to each other, so that a wire of one of the clamp arms passes through the wiring groove and the wiring hole and enters the other of the clamp arms, or Each of the clamp arms includes a shell, and the shell is provided with an accommodation cavity, an air duct, and a battery chamber in this order along the extension direction, the accommodation cavity accommodates the fan assembly, the battery chamber is located at a free end, at least one of the battery chambers accommodates a battery, the battery supplies power to the fan assembly, and the two fan assemblies operate simultaneously or independently, or The shell has a first shell facing the neck and a second shell away from the neck, the fan assembly includes a centrifugal fan blade and a motor, the first shell and the second shell are both formed with the air inlet corresponding to the centrifugal fan blade, and an air outlet is provided on a side wall of the air duct in the shell, and the air inlet, the receiving cavity, the air duct and the air outlet are sequentially connected to each other, or The connecting member is provided with a support portion protruding toward the rear neck, the support portion including a connected support rod and a support pad, the support pad fits around the neck to separate the connecting member from the rear neck, or Each of the air inlets is provided with a baffle, and a gap is formed between the baffle and the shell, so that the outside air flows through the gap to the air inlet, and when the two clamp arms are pivoted toward each other, the support pads are abutted against the two baffles located on the first shell side; or, the second direction is perpendicular to the first direction, and the length of the support pads in the second direction is longer than the length of the connecting member in the second direction; or, Each of the air inlets is provided with a mounting portion and a connection portion connecting the mounting portion and the shell, the fan assembly is mounted on the mounting portion, the motor is disposed corresponding to the mounting portion, and the mounting portion and the connection portion protrude to form a wire passing space, or 2. The portable fan of claim 1, wherein a wire is electrically connected to the motor and the battery, passes from the motor out of the shell into the wire passing space, and passes from the wire passing space into the shell.

12. The portable fan includes a lithium-ion battery, a control main board, and a battery protection device; the lithium ion battery is used to power the portable fan; The control main board is used to control the portable fan, The battery protection device is electrically connected to the control main board, and the pins B+ and B- of the battery protection device are respectively connected to the positive and negative poles of the lithium ion battery; or The battery protection device is integrated into the control main board; or The battery protection device is mechanically connected to the control main board, and a pin P+ of the battery protection device is connected to one pin of the control main board, a pin P- of the battery protection device is connected to another pin of the control main board, and pins B+ and B- of the battery protection device are respectively connected to the positive and negative poles of the lithium ion battery; or The battery protection device is embedded in the control main board; or The battery protection device is welded to the control main board, or The battery protection device is screwed to the control main board; or The battery protection device is riveted to the control main board; or The battery protection device includes an intelligent processor, a current collection module and a voltage collection module, the intelligent processor is connected to the current collection module and the voltage collection module respectively, and the current collection module and the voltage collection module are connected to a power supply module; or 2. The portable fan of claim 1, wherein a power supply module is provided on the control main board, and pins P- and P+ of the battery protection device are respectively connected to pins of the power supply module.

13. the fan assembly includes a fan and a rotating shaft disposed within the housing, the fan rotating about the rotating shaft to exhaust air, the rotating shaft being inserted into the annular body from a first end of the annular body; the fan assembly includes a seal member disposed at a second end of the annular body opposite the first end; and When the rotating shaft is inserted into the annular body, an oil reservoir is formed between the rotating shaft and the seal member, or At least a portion of the oil reservoir radially increases in a direction toward the second end; or an end face of the second end is recessed relative to a surface of the housing to form a recess, the seal member being disposed within the recess, and a surface of the seal member being flush with a surface of the housing; or The material of the sealing member is PE material, and the thickness of the sealing member is 0.05mm-0.3mm; or The fan assembly further includes a bearing, the bearing being disposed radially between the rotating shaft and the annular body and used to fix the rotating shaft to the annular body, and the rotating shaft rotating within the bearing; or The fan assembly further includes two oil rings, which are provided on both axial sides of the connection between the rotating shaft and the bearing, respectively, and are used to seal and maintain lubricant between the rotating shaft and the bearing, thereby ensuring that the rotating shaft continues to rotate stably and smoothly; or the fan assembly further includes a snap ring, the snap ring entering the annular body from the second end, the snap ring engaging with a locking groove of the rotating shaft, the annular body being provided with a stopper protruding inward, an outer diameter of the snap ring being larger than an inner diameter of the stopper, thereby preventing the rotating shaft from coming off the annular body, and a gap being provided between the snap ring and the stopper through which oil can flow in the axial direction, or 2. The portable fan of claim 1, wherein the fan assembly includes a motor that drives the fan, the fan includes a hub and fan blades connected to the hub, and when the rotating shaft is inserted into the annular body, a receiving portion is formed between the hub and the housing, and the receiving portion is used to receive the motor.

14. The housing includes a connection portion and a neck side portion connected to both sides of the connection portion, and the connection portion and the two neck side portions together surround a neck hanging space, The connection portion and / or the neck side portion are provided with an electric exhaust portion, and each of the electric exhaust portions is used to blow air in the direction of the neck hanging space; and The electrical exhaust includes a positioning stud, a rotating blade, and a three-phase motor drive assembly drivingly connected to the rotating blade, the three-phase motor drive assembly including a stator and a rotor sleeved on the outside of the stator, the rotor fixedly mounted on the rotating blade and arranged coaxially with the rotating blade, the stator fixedly sleeved on the positioning stud, or The connection part is provided with the electrical exhaust part, the connection part is provided with a first air guide cavity, the connection part is provided with a first air outlet communicating with the first air guide cavity, the first air outlet faces the space of the housing, a positioning protrusion is provided in the first air guide cavity, the rotating blade is rotatably installed in the first air guide cavity, and is used to blow air into the first air outlet, or The connection portion is provided with a first air inlet communicating with the first air guide cavity, the first air inlet facing an end of the rotating blade, and the first air outlet facing a side surface of the rotating blade; or The rotating blade is provided with a fixing hole, the axis of the fixing hole is on the same line as the axis of the rotating blade, the electrical exhaust unit includes a rotating shaft, a first end of the rotating shaft is inserted and fixed in the fixing hole, a positioning hole is provided inside the positioning protrusion, the axis of the positioning hole is on the same line as the axis of the rotating shaft, and a second end of the rotating shaft is rotatably inserted into the positioning hole, or A plurality of first air guide ribs are provided on the connection portion, and the plurality of first air guide ribs surround the first air guide cavity, and the number of the first air outlets is multiple, and the plurality of first air outlets are installed at intervals along the extension direction of the connection portion, and the end of the first air guide cavity is connected to the plurality of first air outlets, or At least one of the electrical exhaust units includes a bearing unit, an outer ring of the bearing unit is fixed to the positioning hole, and an inner ring of the bearing unit is sleeved onto the second end of the rotating shaft; The bearing portion includes a rolling bearing, the electrical exhaust portion includes a limiting member, the limiting member is installed on a second end of the rotating shaft, the bearing portion is located between the limiting member and the first end of the rotating shaft, the bearing portion is multiple, an inner flange is provided on an inner wall of the positioning hole, and the inner flange is installed between two adjacent bearing portions, thereby installing the two adjacent bearing portions at a distance, or the bearing portion includes a sliding bearing, the electrical exhaust portion includes two seal rings, the two seal rings are sleeved on the rotating shaft and respectively arranged on both sides of the sliding bearing, or The two neck sides are both provided with the electric exhaust unit, a second air guide cavity is provided in the neck side, the neck side is provided with a second air outlet communicating with the second air guide cavity, the second air outlet faces the direction of the space of the housing, the positioning protrusion is provided in the second air guide cavity, the rotating blade is rotatably installed in the second air guide cavity, and is used to blow air to the second air outlet, or The neck side portion is provided with a second air inlet communicating with the second air guide cavity, the second air inlet facing the end of the rotating blade, and the second air outlet facing the side of the rotating blade, or 2. The portable fan of claim 1, wherein the fan further includes a power supply unit, the power supply unit is mounted within the housing, the power supply unit is electrically connected to each of the electrical exhaust units, and the housing is provided with a charging port, the charging port is electrically connected to the power supply unit.

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