Fan with passive power generation device

Abstract

The invention relates to the technical field of electric fans, in particular to a fan with a passive power generation device, which comprises a fan head, a control panel module connected with the fan head and the passive power generation device arranged between the fan head and the control panel module, and the passive power generation device is electrically connected with the control panel module. And the passive power generation device supplies power to the control panel module. The passive power generation device is arranged between the control panel module and the fan head, the passive power generation device can receive the mechanical energy generated by rotation of the fan blades and convert the mechanical energy into the electric energy, and the passive power generation device transmits the electric energy into the control panel module, so that the control panel module operates, and self power generation of the control panel module is achieved; the circuit connection of the control panel module in the fan is simplified, and the assembly difficulty of the control panel module is reduced, so that the assembly efficiency of the fan is improved, and the later maintenance of the control panel module and the fan is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of electric fans, and in particular to a fan with a passive power generation device. Background Art

[0002] Existing electric fans are usually equipped with a control panel, which is connected to the main power supply device of the electric fan through multiple wires. Accordingly, a lead channel for the power supply line to pass through needs to be additionally provided inside the electric fan, resulting in more complicated circuit connections inside the electric fan. When the control panel and the main power supply device are not arranged on the same straight line, due to the volume and other structural limitations of the electric fan, the lead channel needs to be adjusted accordingly to bypass other structures, resulting in more complicated circuits inside the electric fan, thereby increasing the difficulty of assembling the control panel circuit connection in the electric fan, resulting in reduced assembly efficiency of the electric fan, and increasing the difficulty of disassembling and assembling the control panel, which is not conducive to the later maintenance of the control panel and the electric fan.

[0003] The present invention is proposed in view of the deficiencies in the prior art. Summary of the invention

[0004] The present invention aims to solve the problem that the control panel and the main power supply device in the above-mentioned existing electric fan are connected through multiple wires, which makes the internal circuit of the electric fan more complicated, increases the difficulty of assembling the control panel in the electric fan, reduces the assembly efficiency of the electric fan, and increases the difficulty of disassembling and assembling the control panel, which is not conducive to the later maintenance of the control panel and the electric fan. A fan with a passive power generation device is proposed.

[0005] The technical solution adopted by the present invention to solve the technical problem is: A fan with a passive power generation device comprises a fan head, a control panel module connected to the fan head, and a passive power generation device arranged between the fan head and the control panel module, wherein the passive power generation device is electrically connected to the control panel module, and the control panel module is powered by the passive power generation device.

[0006] A fan with a passive power generation device as described above, the fan head includes an axially rotatable blade component and a rotating device connected to the blade component, the passive power generation device includes an induction coil and a permanent magnet arranged relatively to each other at an interval, the induction coil is electrically connected to the control panel module, the permanent magnet is connected to the blade component, the blade component is driven to rotate axially by the rotating device, and the permanent magnet is driven to rotate relative to the induction coil, so as to trigger the induction coil to power the control panel module.

[0007] In a fan with a passive power generation device as described above, the induction coil includes a first connecting section and a second connecting section for connecting the control panel module, and a coil section arranged between the first connecting section and the second connecting section, the coil section is axially wound to form a plurality of spaced-apart layered coils, and the outer diameter of the coil section gradually increases along the axial direction from close to the permanent magnet to away from the permanent magnet.

[0008] In the fan with a passive power generation device as described above, a coil axis is provided in the induction coil, and the coil axis is located on one side of the rotation axis of the permanent magnet.

[0009] In the fan with a passive power generation device as described above, along the axial direction of the induction coil, the projected area of ​​the permanent magnet is smaller than or equal to the projected area of ​​the induction coil.

[0010] In a fan with a passive power generation device as described above, the blade component includes a blade sleeve and a plurality of blades spaced apart along the outer circumference of the blade sleeve. The permanent magnet is fixedly installed in the blade sleeve and faces the induction coil.

[0011] In the fan with a passive power generation device as described above, the blade sleeve is provided with a first installation cavity open to the induction coil, and at least a part of the permanent magnet is arranged in the first installation cavity.

[0012] In a fan with a passive power generation device as described above, the permanent magnet is fixedly connected to the blade sleeve through a mounting bracket, the mounting bracket is provided with a second mounting cavity facing the first mounting cavity and a connecting portion connected to the rotating device, the permanent magnet is arranged in the second mounting cavity, and the connecting portion is arranged on one side of the second mounting cavity.

[0013] In a fan with a passive power generation device as described above, the control panel module includes a circuit board, an operating unit electrically connected to the circuit board, and at least one battery, the induction coil is electrically connected to the circuit board, and the induction coil is arranged on a side of the circuit board facing the permanent magnet, and the operating unit and the battery are arranged on a side of the circuit board away from the permanent magnet.

[0014] In the fan with a passive power generation device as described above, a gap is formed between the induction coil and the circuit board.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The fan in the present invention eliminates the wire connection between the control panel module and the fan's main power supply. A passive power generation device is set between the control panel module and the fan head. The passive power generation device can receive the mechanical energy of the rotation of the fan blades and convert it into electrical energy. The electrical energy is transmitted to the control panel module through the passive power generation device, so that the control panel module is operated to realize the self-generation function of the control panel module, simplify the line connection of the control panel module in the fan, reduce the assembly difficulty of the control panel module, and promote the rapid disassembly and assembly of the control panel module, thereby improving the assembly efficiency of the fan and facilitating the later maintenance of the control panel module and the fan.

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional diagram of a fan head of the present invention; Figure 2 Decomposition of the fan head of the present invention Figure 1 ; Figure 3 The fan head of the present invention is decomposed Figure 2 ; Figure 4 is a three-dimensional diagram of the induction coil of the present invention; Figure 5 is a structural diagram of the passive power generation device of the present invention; Figure 6 for Figure 1 A-A section view in FIG. Figure 7 for Figure 6 Local zoom in Figure 1 ; Figure 8 for Figure 6 Local zoom in Figure 2 . DETAILED DESCRIPTION

[0018] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] Embodiment 1: like Figure 1 As shown in FIG8 , the present invention provides a fan with a passive power generation device, comprising a fan head 1, a control panel module 2 and a passive power generation device 3, wherein the control panel module 2 is detachably connected to the fan head 1, and the control panel module 2 is preferably arranged in the middle position of one side of the fan head 1, and the control panel module 2 faces the side away from the fan head 1 for user operation; the passive power generation device 3 is arranged between the fan head 1 and the control panel module 2, and the passive power generation device 3 is electrically connected to the control panel module 2, and the fan head 1 has an operating state in which the fan blades rotate to supply air and a shutdown state in which the fan blades are stationary. When the fan head 1 is in the operating state, the passive power generation device 3 receives the mechanical energy of the fan blade rotation from the fan head 1, and converts the mechanical energy into electrical energy for controlling the operation of the control panel module 2, so as to realize that the passive power generation device 3 supplies power to the control panel module 2. Compared with the method in which the control panel in the traditional fan is connected to the fan main power supply through multiple wires, the fan in this embodiment cancels the wire connection between the control panel module 2 and the fan main power supply, and by setting the passive power generation device 3 between the control panel module 2 and the fan head 1, the passive power generation device 3 can receive the mechanical energy of the rotation of the fan blades and convert it into electrical energy, and transmit the electrical energy to the control panel module 2 through the passive power generation device 3, so that the control panel module 2 is operated to realize the self-generation function of the control panel module 2, simplifying the line connection of the control panel module 2 in the fan, reducing the difficulty of assembling the control panel module 2, and promoting the rapid disassembly and assembly of the control panel module 2, thereby improving the assembly efficiency of the fan and facilitating the later maintenance of the control panel module 2 and the fan.

[0022] Embodiment 2: Example 2 is based on Example 1 and has the following implementation method: Figure 1As shown in FIG. 8 , the fan head 1 includes an axially rotatable blade component 11 and a rotating device 12 connected to the blade component 11, wherein the rotating device 12 is used to drive the blade component 11 to axially rotate, and the passive power generation device 3 includes an induction coil 31 and a permanent magnet 32 ​​that are relatively arranged at an interval H2, wherein the induction coil 31 is electrically connected to the control panel module 2 to form a closed circuit that can control the operation of the control panel module 2, and the permanent magnet 32 ​​is detachably fixedly connected to the blade component 11. When the fan head 1 is in In the operating state, the fan blade component 11 is driven by the rotating device 12 to rotate axially around the output shaft 121 of the rotating device 12, and the fan blade component 11 drives the permanent magnet 32 ​​to rotate synchronously, that is, the rotation axis L2 of the permanent magnet 32 ​​is consistent with the rotation axis L2 of the fan blade component 11, and the permanent magnet 32 ​​is rotated relative to the induction coil 31, and electromagnetic induction is generated between the permanent magnet 32 ​​and the induction coil 31, so that the induction coil 31 generates current, thereby supplying power to the control panel module 2. The passive power generation device 3 in this embodiment converts the mechanical energy of the rotation of the fan blade component 11 into electrical energy for the operation of the control panel module 2 through electromagnetic induction, so as to realize the self-generation of the control panel module 2, and has a simple structure. The passive power generation device 3 is small in size and suitable for use with electric fans, and the electromagnetic induction device can maintain efficient energy conversion at different rotation speeds of the fan blade component 11, which can make the control panel module 2 run stably and optimize the user experience.

[0023] Optionally, the fan head 1 also includes a fan cover 13, the output shaft 121 of the rotating device 12 extends from one side of the fan cover 13 into the interior of the fan cover 13, the fan blade component 11 is arranged inside the fan cover 13 and is fixedly connected to the output shaft 121 of the rotating device 12, and the control panel module 2 is arranged on a side of the fan cover 13 away from the rotating device 12. For example, the control panel module 2 and the rotating device 12 are respectively arranged on the front and rear sides of the fan cover 13. Preferably, the control panel module 2 is arranged in the middle position of the front side of the fan cover 13 to facilitate people to operate the control panel module 2.

[0024] Embodiment 3: Example 3 is based on Example 2 and has the following implementation method: Figure 4As shown, the induction coil 31 includes a first connection segment 311 and a second connection segment 312 for connecting the control panel module 2, and a coil segment 313 arranged between the first connection segment 311 and the second connection segment 312. Preferably, the induction coil 31 is formed by bending a metal conductor to form the first connection segment 311, the second connection segment 312 and the coil segment 313, so as to enhance the structural strength of the induction coil 31; the coil segment 313 is axially wound to form a plurality of layered coils arranged at equal intervals H2, so that the coil segment 313 forms a spiral structure, which increases the contact area between the induction coil 31 and the magnetic field in the permanent magnet 32, so as to increase the inductance and current carrying capacity in the induction coil 31, and improve the efficiency of electromagnetic induction, so that the induction coil 31 can more efficiently capture and convert the magnetic field energy into electrical energy. In addition, the spiral coil has good heat dissipation performance, which helps to reduce the temperature of the induction coil 31 during the electromagnetic induction process, reduce heat loss and energy waste, and thus improve the efficiency and stability of the passive power generation device 3.

[0025] Furthermore, the outer diameter of the coil segment 313 gradually increases along the axial direction from close to the permanent magnet 32 ​​to away from the permanent magnet 32, that is, the outer diameter of each layer coil gradually increases along the axial direction from close to the permanent magnet 32 ​​to away from the permanent magnet 32; the induction coil 31 is preferably set as a conical coil. Compared with the traditional cylindrical coil, the induction coil 31 in this embodiment further increases the contact area with the magnetic field, thereby improving the efficiency of electromagnetic induction power generation, making the power generation of the passive power generation device 3 more efficient and stable, thereby ensuring the stable operation of the control panel module 2.

[0026] Optionally, the laminar coil includes at least a head-end laminar coil 3131a away from the control panel module 2 and an end laminar coil 3131b close to the control panel module 2, the first connecting section 311 is connected to the head-end laminar coil 3131a, the first connecting section 311 extends radially toward one side and is electrically connected to the control panel module 2, the second connecting section 312 is connected to the end laminar coil 3131b, the second connecting section 312 extends radially toward one side and is electrically connected to the control panel module 2; further optionally, the extension direction of the first connecting section 311 and the second connecting section 312 may be on the same side or different sides.

[0027] Embodiment 4: Example 4 is based on Example 2 and / or Example 3 and has the following implementation methods: Figure 6As shown in FIG. 8 , a coil axis L1 is axially provided in the induction coil 31, and the coil axis L1 is the central axis of the coil segment 313. The coil axis L1 is located on one side of the rotation axis L2 of the permanent magnet 32. In the present embodiment, the permanent magnet 32 ​​is arranged on one side of the output shaft 121 of the rotating device 12. The permanent magnet 32 ​​rotates relative to the induction coil 31 around the output shaft 121 of the rotating device 12 through the fan blade component 11. The rotation axis L2 of the permanent magnet 32 ​​is the axis where the output shaft 121 of the rotating device 12 is located. Figure 7 As shown, the installation position of the induction coil 31 corresponds to the position of the permanent magnet 32 ​​and is located on one side of the output shaft 121 of the rotating device 12. The relative arrangement of the permanent magnet 32 ​​and the induction coil 31 with a spacing H2 is beneficial to concentrating the magnetic field of the permanent magnet 32 ​​near the induction coil 31. When the permanent magnet 32 ​​rotates axially around the output shaft 121 of the rotating device 12 relative to the induction coil 31, the permanent magnet 32 ​​and its magnetic field continuously move closer to and away from the induction coil 31, which is beneficial to making the magnetic flux in the induction coil 31 change more greatly, thereby increasing the induced electromotive force and improving the power generation effect of the passive power generation device 3.

[0028] Further optionally, in the vertical direction, a certain interval H2 is maintained between the permanent magnet 32 ​​and the induction coil 31 to reduce eddy current loss, reduce electromagnetic interference, and avoid magnetic leakage, and as the fan blade component 11 drives the permanent magnet 32 ​​to rotate, it is beneficial to enhance the air flow between the permanent magnet 32 ​​and the induction coil 31, thereby improving the heat dissipation effect and achieving protection for the passive power generation device 3; optionally, the interval H2 is 0 to 11 mm, and the interval H2 is greater than 0, wherein, for the relationship between electromagnetic power generation and the volume of the fan, the interval H2 can be set to be greater than or equal to 1 mm, 2 mm, 5 mm, 8 mm, etc.; further optionally, the interval H2 is: 2mm≦H2≦8mm.

[0029] Embodiment 5: Embodiment 5 is based on one or more of Embodiments 2 to 4 and has the following implementation methods: Figure 5As shown, along the axial direction of the induction coil 31, the projected area of ​​the permanent magnet 32 ​​is less than or equal to the projected area of ​​the induction coil 31, so that the magnetic field generated by the permanent magnet 32 ​​can fully cover the induction coil 31, reduce magnetic field leakage, thereby optimizing the distribution of magnetic flux and improving the power generation efficiency of the passive power generation device 3; optionally, the projected area of ​​the permanent magnet 32 ​​is 1 / 4 to 1 of the projected area of ​​the induction coil 31; further optionally, the projected area of ​​the permanent magnet 32 ​​is 1 / 4, 1 / 3, 1 / 2 or 1 of the projected area of ​​the induction coil 31; it should be noted that, in this embodiment, the axial direction of the induction coil 31 is the axial direction of the coil segment 313.

[0030] In some other optional embodiments, the projection area of ​​the permanent magnet 32 ​​is 1 / 3 to 1 / 3 of the projection area of ​​the induction coil 31 .

[0031] Embodiment 6: Example 6 is based on one or more of Examples 2 to 5, and has the following implementation methods: Figure 2 , 3 As shown in Figure 6, the fan blade component 11 includes a fan blade sleeve 111, a plurality of blades 112 arranged at intervals H2 along the outer peripheral side of the fan blade sleeve 111, and the permanent magnet 32 ​​is fixedly installed in the fan blade sleeve 111 and faces the induction coil 31; in this embodiment, the output shaft 121 of the rotating device 12 is passed through and fixed in the fan blade sleeve 111 from a side away from the control panel module 2, and the fan blade component 11 is driven by the rotating device 12 to rotate axially around its output shaft 121, thereby realizing the operating state of the blades 112 rotating to supply air; optionally, the rotating device 12 can adopt a common driving device for rotating the electric fan blades 112.

[0032] Optionally, the permanent magnet 32 ​​is arranged on one side of the output shaft 121 of the rotating device 12, and the installation position of the induction coil 31 corresponds to the permanent magnet 32 ​​and is located on one side of the output shaft 121 of the rotating device 12. During assembly, the permanent magnet 32 ​​can be installed on the circumferential side of the output shaft 121 of the rotating device 12, which is beneficial to reduce the thickness of the permanent magnet 32 ​​and the blade sleeve 111 after assembly, making the internal structure of the fan head 1 more compact, thereby reducing the volume of the fan head 1.

[0033] Embodiment 7: Example 7 is based on Example 6 and has the following implementation method: Figure 7As shown, the fan blade sleeve 111 is provided with a first installation cavity 1111 open to the induction coil 31, the permanent magnet 32 ​​is at least partially arranged in the first installation cavity 1111, and the permanent magnet 32 ​​is located on the side of the output shaft 121 of the rotating device 12. When the fan is in operation, the permanent magnet 32 ​​is driven by the fan blade sleeve 111 to rotate around the output shaft 121 of the rotating device 12.

[0034] Optionally, in some embodiments, the permanent magnet 32 ​​may be directly installed in the first installation cavity 1111 .

[0035] Optionally, in other embodiments, such as Figure 7 As shown, the permanent magnet 32 ​​is fixedly connected to the fan sleeve 111 through a mounting bracket 33 to enhance the installation stability of the permanent magnet 32. The mounting bracket 33 is provided with a second mounting cavity 331 facing the first mounting cavity 1111 and a connecting portion 332 connected to the rotating device 12. The permanent magnet 32 ​​is installed in the second mounting cavity 331 by interference fit, and the permanent magnet 32 ​​is clamped by the inner wall of the second mounting cavity 331. Further optionally, the second mounting cavity 331 is set as a rectangular cavity, that is, the permanent magnet 32 ​​is set as a rectangular structure, which can increase the projection area of ​​the permanent magnet 32 ​​compared with the traditional columnar permanent magnet 32, and as shown Figure 7 As shown, the longitudinal length of the permanent magnet 32 ​​is smaller than the lateral length of the permanent magnet 32, so as to increase the amount of cutting of the magnetic field of the permanent magnet 32 ​​by the induction coil 31, thereby improving the power generation efficiency of the passive power generation device 3; the connecting portion 332 is arranged in the middle position of the mounting bracket 33 toward the side of the fan sleeve 111, and the connecting portion 332 extends from the mounting bracket 33 toward the direction close to the rotating device 12, the output shaft 121 of the rotating device 12 is axially penetrated from the rear side of the fan sleeve 111 in the fan sleeve 111, and at least part of the output shaft 121 of the rotating device 12 can be extended into the first mounting cavity 1111, and is correspondingly connected with the output shaft 121 of the rotating device 12 through the connecting portion 332, the permanent magnet 32 ​​is arranged in the second mounting cavity 331, and the connecting portion 332 is arranged on one side of the second mounting cavity 331.

[0036] Further optionally, a first abutting portion 1112 in contact with the mounting bracket 33 is provided in the first mounting cavity 1111, and a second abutting portion 333 extending toward the outer peripheral side of the mounting bracket 33 is provided on the side of the mounting bracket 33 facing the rotating device 12. When the mounting bracket 33 is connected to the rotating device 12 through the connecting portion 332, the second abutting portion 333 abuts against the first abutting portion 1112, and the second mounting cavity 331 is opposite to the inner wall of the first mounting cavity 1111, so as to enhance the connection stability of the mounting bracket 33, thereby enhancing the connection stability of the permanent magnet 32 ​​and preventing the mounting bracket 33 and the permanent magnet 32 ​​from loosening during rotation; further optionally, the first abutting portion 1112 and the second abutting portion 333 can be bonded to further fix the mounting bracket 33.

[0037] Optionally, the inner wall of the second installation cavity 331 extends axially toward the connecting portion 332 to increase the installation depth of the second installation cavity 331 , thereby improving the installation stability of the permanent magnet 32 ​​and preventing the permanent magnet 32 ​​from escaping from the second installation cavity 331 during rotation.

[0038] Optionally, in some other embodiments, a plurality of the second installation cavities 331 may be provided, and the second installation cavities 331 are evenly distributed around the circumference of the connecting portion 332 , so as to further enhance the magnetic field strength and improve the power generation efficiency of the passive power generation device 3 .

[0039] Embodiment 8: Embodiment 8 is based on one or more of Embodiments 2 to 7 and has the following implementation methods: Figure 2 As shown, the control panel module 2 includes a circuit board 21, an operating unit 22 electrically connected to the circuit board 21, and at least one battery 23. The induction coil 31 is electrically connected to the circuit board 21, and the induction coil 31 is arranged on a side of the circuit board 21 facing the permanent magnet 32. The operating unit 22 and the battery 23 are arranged on a side of the circuit board 21 away from the permanent magnet 32. The operating unit 22 can be set as a button unit for the user to operate and adjust the switch, gear and other functions of the fan. The battery 23 can be used for charging. When the induction coil 31 generates current through the electromagnetic induction process and supplies power to the control panel module 2, the battery 23 can be charged. The battery 23 can temporarily store the current generated in the passive power generation device 3 to ensure the battery life and use of the control panel module 2.

[0040] Further, such as Figure 7 and Figure 8As shown, a gap H1 is formed between the induction coil 31 and the circuit board 21, that is, a gap H1 of at least 1 mm exists between the end layer coil 3131b and the circuit board 21, so as to avoid the coil segment 313 of the induction coil 31 from directly contacting with the circuit board 21 to cause a short circuit or an open circuit, thereby ensuring the normal use of the control panel module 2. Moreover, the gap H1 is provided between the induction coil 31 and the circuit board 21, which is beneficial to the heat dissipation of the induction coil 31.

[0041] Embodiment 9: Example 9 is based on Example 8 and has the following implementation method: Figure 1 and Figure 2 As shown, the control panel module 2 is fixed to the front side of the fan cover 13 by means of a mounting shell 24, so that the control panel module 2 can be detachably connected; further, the induction coil 31 is electrically connected to the control panel module 2, and the induction coil 31 is also placed in the mounting shell 24, and the mounting shell 24 is preferably an insulating shell, through which the induction coil 31 is separated from the external environment, so as to protect the induction coil 31 and ensure the normal operation of the passive power generation device 3.

[0042] Optional, such as Figure 7As shown, the mounting shell 24 includes a detachably connected top cover 241 and a bottom shell 242, the bottom shell 242 is provided with a first accommodating cavity 2421 open to one side, the first accommodating cavity 2421 is used to install the control panel module 2 and the induction coil 31, the side wall of the bottom shell 242 is provided with a first clamping portion 2422, the top cover 241 is provided with a second accommodating cavity 2411 open to one side, the side wall of the top cover 241 is connected with a second clamping portion 2412 corresponding to the first clamping portion 2422, optionally, the clamping structure between the bottom shell 242 and the top cover 241 can adopt a connection structure of a projection and a groove interference fit, and further preferably, A rubber ring 243 is provided between the first clamping portion 2422 and the second clamping portion 2412 to further enhance the connection stability between the top cover 241 and the bottom shell 242; the top cover 241 and the bottom shell 242 are detachably connected by clamping the second clamping portion 2412 with the first clamping portion 2422, and the control panel module 2 and the induction coil 31 are fixedly installed in the first accommodating cavity 2421 and the second accommodating cavity 2411, so that the control panel module 2 forms an independent module through the installation shell 24, and the independent module is detachably connected to the fan cover 13 to facilitate the rapid assembly and maintenance of the control panel module 2. Furthermore, in some embodiments, a gap H2 is provided between the permanent magnet 32 ​​and the induction coil 31, and the spacing of the gap H2 is 0 to 11 mm. The gap space can meet the assembly of the bottom shell 242 and the mounting bracket 33 for mounting the permanent magnet 32, such as Figure 7 As shown, in order to ensure the electromagnetic induction efficiency between the permanent magnet 32 ​​and the induction coil 31, the thickness H3 of the bottom shell 242 is about 2 mm, and the thickness H4 of the side of the mounting bracket 33 facing the induction coil 31 is about 1-2 mm, so as to reduce leakage magnetic flux while protecting the permanent magnet 32 ​​and the induction coil 31; in addition, the spacing between the permanent magnet 32 ​​and the induction coil 31 can be 5-8 mm by subtracting the thickness H3 of the bottom shell 242 and the thickness H4 of the mounting bracket 33 from the interval H2.

[0043] Optionally, the bottom wall of the bottom shell 242 is provided with a plurality of assembly columns extending toward the top cover 241, and the circuit board 21 is provided with assembly holes corresponding to the assembly columns. The control panel module can be installed on the assembly columns by threaded connection, so that the control panel module can be quickly disassembled and assembled.

[0044] The above examples are only used to further illustrate the technical content of the present invention, so that readers can understand it more easily, but they do not mean that the implementation of the present invention is limited to this. Any technical extension or re-creation made according to the present invention is protected by the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A fan with a passive power generation device, characterized in that: The invention comprises a fan head (1), a control panel module (2) connected to the fan head (1), and a passive power generation device (3) arranged between the fan head (1) and the control panel module (2), wherein the passive power generation device (3) is electrically connected to the control panel module (2), and the control panel module (2) is powered by the passive power generation device (3).

2. A fan with a passive power generation device as claimed in claim 1, characterized in that: The fan head (1) comprises an axially rotatable blade component (11) and a rotating device (12) connected to the blade component (11); the passive power generation device (3) comprises an induction coil (31) and a permanent magnet (32) arranged relative to each other at an interval; the induction coil (31) is electrically connected to the control panel module (2); the permanent magnet (32) is connected to the blade component (11); the blade component (11) is driven to rotate axially by the rotating device (12), thereby driving the permanent magnet (32) to rotate relative to the induction coil (31), so as to trigger the induction coil (31) to supply power to the control panel module (2).

3. A fan with a passive power generation device as claimed in claim 2, characterized in that: The induction coil (31) comprises a first connecting section (311) and a second connecting section (312) for connecting the control panel module (2), and a coil section (313) arranged between the first connecting section (311) and the second connecting section (312), the coil section (313) being axially wound to form a plurality of spaced-apart layered coils, and the outer diameter of the coil section (313) gradually increases in an axial direction from a direction close to the permanent magnet (32) to a direction away from the permanent magnet (32).

4. A fan with a passive power generation device as claimed in claim 2, characterized in that: A coil axis is provided in the induction coil (31), and the coil axis is located on one side of the rotation axis of the permanent magnet (32).

5. A fan with a passive power generation device as claimed in claim 2, characterized in that: Along the axial direction of the induction coil (31), the projection area of ​​the permanent magnet (32) is smaller than or equal to the projection area of ​​the induction coil (31).

6. A fan with a passive power generation device as claimed in claim 2, characterized in that: The fan blade component (11) comprises a fan blade sleeve (111), and a plurality of blades (112) arranged at intervals along the outer peripheral side of the fan blade sleeve (111); the permanent magnet (32) is fixedly mounted in the fan blade sleeve (111) and faces the induction coil (31).

7. A fan with a passive power generation device as claimed in claim 6, characterized in that: The fan blade sleeve (111) is provided with a first installation cavity (1111) open toward the induction coil (31), and at least a portion of the permanent magnet (32) is disposed in the first installation cavity (1111).

8. A fan with a passive power generation device as claimed in claim 7, characterized in that: The permanent magnet (32) is fixedly connected to the fan blade sleeve (111) via a mounting bracket (33); a second mounting cavity (331) facing the first mounting cavity (1111) and a connecting portion (332) connected to the rotating device (12) are provided in the mounting bracket (33); the permanent magnet (32) is arranged in the second mounting cavity (331); and the connecting portion (332) is arranged on one side of the second mounting cavity (331).

9. A fan with a passive power generation device as claimed in claim 2, characterized in that: The control panel module (2) comprises a circuit board (21), an operating unit (22) and at least one storage battery (23) electrically connected to the circuit board (21); the induction coil (31) is electrically connected to the circuit board (21), and the induction coil (31) is arranged on a side of the circuit board (21) facing the permanent magnet (32); and the operating unit (22) and the storage battery (23) are arranged on a side of the circuit board (21) away from the permanent magnet (32).

10. A fan with a passive power generation device as claimed in claim 9, characterized in that: A gap is formed between the induction coil (31) and the circuit board (21).

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