TWM588742U - Structure improvement of three-phase brushless fan - Google Patents

Abstract

This creation is related to the structural improvement of a three-phase brushless fan. The housing has a shaft at the bottom of the accommodating groove, and a plurality of winding columns around the shaft are provided with a winding part. The fan of the movable module, and the fan is provided with a shaft connecting part pivotally connected to the shaft part, and at least a magnetic element with at least one set of staggered south magnetic zone and north magnetic zone is arranged around the shaft connecting part, and The circuit board containing the circuit module in the accommodating slot, and the circuit board is electrically connected with a plurality of coils wound on a plurality of winding columns with at least one wire, and the number of the plurality of coils is a multiple of three or three , And the number of the plural coils is not equal to the total amount of the south magnetic zone and the north magnetic zone, and then a driving element is electrically connected on the surface of the circuit board, the plural coils can be wound through at least one wire to save The step of placing multiple coils on the circuit board does not require labor to solder the two ends of the multiple wires to the circuit board one by one, thereby reducing the defect rate and assembly cost.

Description

Structural improvement of three-phase brushless fan

This creation provides a structural improvement of a three-phase brushless fan, especially the circuit module is located on the complex winding post of the winding part, and at least one wire is wound with three or multiple multiples of the complex coil, which can be omitted The step of placing multiple coils on the circuit board does not require labor to solder the two ends of the multiple wires to the circuit board one by one, so as to reduce the defect rate and assembly cost.

Press, general electronic devices such as notebook computers, desktop computers, tablets or smart phones will generate heat energy during operation, so most of the electronic devices are equipped with single-phase brushless motor fans to pass through the single-phase brushless motor Fans are used for heat dissipation. However, most single-phase brushless motor fans have many disadvantages. The disadvantages are:

(1) The Hall sensor is arranged at the position below the rotor for magnetic induction, which will occupy space, making the fan not easy to be thin.

(2) The torque ripple of the single-phase brushless motor fan is large, so that the fan is prone to vibration and noise when it is used.

(3) The dead point must be avoided when the single-phase brushless motor fan is started. Therefore, the Cogging Torque of the single-phase brushless motor fan must meet the appropriate size, however, the torque is easy to produce The lack of vibration and excessive starting voltage leads to mass production of man-hours and manpower to deal with the wind Fan to perform the inspection operation.

Therefore, in order to solve the lack of single-phase brushless motor fans, fan manufacturers have developed three-phase brushless motor fans with excellent characteristics such as no starting dead point and low torque ripple. However, the current three-phase brushless motor fans The process of combining a plurality of coils on a circuit board requires that the enameled wire be wound externally to form a plurality of coils, and then the plurality of coils are soldered on the circuit board one by one. The manufacturing process is quite complicated, and it is relatively easy to fail the welding and consume a lot of manpower With time, further increase the defect rate and assembly cost.

Therefore, how to solve the problem that the conventional three-phase brushless motor fan is too complicated due to its complex coil manufacturing process and assembly process on the circuit board, thereby increasing the defect rate and assembly cost, which is urgently needed by relevant manufacturers engaged in this industry to study The direction of improvement.

Therefore, in view of the above problems and deficiencies, the creators collected relevant materials, evaluated and considered through multiple parties, and based on years of experience in this industry, through continuous trial and modification, they designed this three-phase brushless fan. A new type of structural improvement was born.

The main purpose of this creation is that the bottom of the accommodating groove of the casing is provided with a shaft part, and a plurality of winding columns of the winding part are provided around the shaft part, and the fan of the rotating module is accommodated in the accommodating groove, and One side of the fan is provided with a shaft connecting part pivotally connected to the shaft part, and at least one magnetic element with at least one set of staggered south magnetic area and north magnetic area is arranged around the shaft connecting part, and is accommodated in the accommodating groove The circuit board of the circuit module, and the circuit board is electrically connected with a plurality of coils wound on at least one wire on a plurality of bobbins, the number of the plurality of coils is a multiple of three or three, and the number of the plurality of coils It is not equal to the total amount of the south magnetic area and the north magnetic area, and the driving element is electrically connected on the surface of the circuit board, and at least four metal contacts (U , V, W and ground), you can save the step of placing the multiple coils on the circuit board by winding at least one wire to form the multiple coils, and no labor is required to solder the two ends of the multiple wires one by one. On the circuit board, the purpose of reducing the defect rate and assembly cost can be achieved.

The secondary purpose of this creation is that the base is composed of a metal base and a plastic outer frame, which can increase the overall structural strength through the metal base, to avoid the base of the rotary module fan bending deformation In this situation, the purpose of making the fan rotate smoothly and surely is achieved.

Another purpose of this creation is that the circuit board is electrically connected to the driving element through the side plate at one side, that is, the position of the driving element can be distanced from the complex coil by the side plate to avoid affecting at least one wire in the complex number The operation of winding a plurality of coils on the bobbin, and because the driving element is at a distance from the plurality of coils, it will not affect the fan assembly, so the fan does not need to consider the thickness of the driving element to increase the height, you can reduce the overall height, In order to achieve the purpose of making the three-phase brushless fan thin.

1‧‧‧Housing

11‧‧‧Body

110‧‧‧accommodation slot

111‧‧‧Metal base

112‧‧‧Plastic frame

113‧‧‧Shaft

1131‧‧‧Shaft

114‧‧‧Winding Department

1141‧‧‧Winding column

115‧‧‧ First vent

116‧‧‧ opening

117‧‧‧Joint

1171‧‧‧buckle

118‧‧‧groove

12‧‧‧cover

121‧‧‧The second vent

122‧‧‧Positioning Department

1221‧‧‧Snap

13‧‧‧Magnetic guide

2‧‧‧Rotating module

21‧‧‧Fan

211‧‧‧slot

212‧‧‧fan blade

22‧‧‧Shaft joint

221‧‧‧Shaft slot

23‧‧‧Magnetic components

230‧‧‧Through hole

231‧‧‧ Magnetic Region

232‧‧‧North Magnetic Zone

3‧‧‧ circuit module

31‧‧‧ circuit board

311‧‧‧Perforation

312‧‧‧Limit hole

313‧‧‧Side board

314‧‧‧Limited film

32‧‧‧coil

321‧‧‧ head end

322‧‧‧ connection section

33‧‧‧Drive components

34‧‧‧Metal contact

The first picture is a three-dimensional appearance drawing of this creation.

The second picture is a three-dimensional exploded view of this creation.

The third picture is a three-dimensional exploded view of the creation from another perspective.

The fourth picture is a side sectional view of this creation.

The fifth picture is a partially enlarged view of the fourth picture of this creation.

In order to achieve the above purpose and effect, the technical means and structure adopted in this creation For the sake of creation, the following is a detailed description of the preferred embodiment of this creation. Its features and functions are as follows, and Poli fully understands it.

Please refer to the first, second, third, fourth, and fifth figures, which are the three-dimensional appearance drawing, the three-dimensional exploded view, the three-dimensional exploded view from another perspective, the side cross-sectional view, and the partially enlarged view of the fourth image. It can be clearly seen from the figure that this creative system can be a three-phase (U, V, W) brushless fan, and includes a housing 1, a rotating module 2 and a circuit module 3, in which: the housing 1 includes There are a seat body 11, a cover body 12 and a magnetic conducting member 13, wherein the seat body 11 has a metal base 111, and a plastic outer frame 112 is assembled on the metal base 111, and an accommodating groove 110 is recessed on the surface of the seat body 11, A shaft portion 113 is provided on the bottom surface of the containing groove 110, and a shaft core 1131 is protruded at the center of the bottom surface of the containing groove 110, and a winding portion 114 is provided around the shaft portion 113 A plurality of winding poles 1141 are provided around the portion 114 around the shaft portion 113, and a plurality of first air vents 115 are provided around the winding portion 114, and a side wall of the accommodation groove 110 is provided outward The through opening 116 is provided with a coupling portion 117 on the outer wall surface of the seat body 11. The coupling portion 117 is protrudingly provided with a plurality of buckles 1171 on the outer wall surface of the seat body 11, and on the bottom surface of the accommodating groove 110 and on the shaft portion 113 and An annular groove 118 is provided between the winding parts 114.

The above-mentioned cover body 12 is coupled to the seat body 11, and the surface of the cover body 12 is provided with a second air vent 121, and a positioning portion 122 for positioning on the coupling portion 117 is provided at the periphery of the cover body 12 and positioned The portion 122 is located at the periphery of the cover 12 and is bent with a plurality of buckles 1221 for being held on the plurality of buckles 1171; in addition, the magnetically conductive member 13 is installed and fixed in the groove 118.

The rotating module 2 includes a fan 21, a shaft connecting portion 22, and a magnetic element 23, wherein the fan 21 is accommodated in the accommodating groove 110 of the seat body 11, and an engaging groove is recessed on one surface of the fan 21 211, and a plurality of adjacent blades 212 are arranged around the periphery of the fan 21, and a shaft connecting portion 22 pivotally connected to the shaft portion 113 is provided inside the joint groove 211, and a recess is provided inside the shaft connecting portion 22 A shaft connecting groove 221 pivotally connected to the shaft core 1131, and a ring-shaped magnetic element 23 located in the engaging groove 211 is provided around the shaft connecting portion 22, and the shaft of the magnetic element 23 is provided at the center for the shaft connecting portion 22 to pass through The through hole 230 and the magnetic element 23 are provided with at least one set of staggered south magnetic regions 231 and north magnetic regions 232 by magnetization.

The circuit module 3 includes a circuit board 31, a plurality of coils 32 and a driving element 33, wherein the surface of the circuit board 31 is provided with a through hole 311 through which the shaft connecting portion 22 can pass, and a ring is provided around the through hole 311 There are a plurality of limiting holes 312 for the plurality of winding posts 1141 to pass through, and a side plate 313 extends outward from one side of the circuit board 31, and a circuit board 31 corresponding to the plurality of limiting holes 312 is provided with a sleeve connected to the plurality of windings The plurality of limit pieces 314 of the bobbin 1141, and then the plurality of winding coils 1141 through which the plurality of limit holes 312 are passed are directly wound with at least one wire with a plurality of plural coils 32 in multiples of three or three, and at least three coils 32 Two ends are provided with two ends 321, and a connecting section 322 is formed between at least two coils, and another is electrically connected to the surface of the side plate 313 of the circuit board 31 to convert direct current into three phases (U, V, W ) The current is given to the driving element 33 of the three-phase current of the complex coil 32, and at least four metal contacts 34 are provided on the surface of the circuit board 31 and around the perforation 311 for the electrical connection of the complex coil 32; The metal contacts 34 may be U, V, W phase and grounded metal contacts 34.

The seat body 11 of the above-mentioned housing 1 is preferably capable of forming a plastic outer frame 112 and a plurality of winding posts 1141 made of plastic material on the metal base 111 by injection molding, but in actual application, it can also be embedded Card structure, snap-fit structure or other combination and assembly methods to form a plastic outer frame 112 and a plurality of plastic winding posts 1141; in addition, the seat body 11 can also be made of a plastic material integrally formed, or a separate plastic Components.

Furthermore, the groove 118 of the seat body 11 is preferably provided at the bottom surface of the accommodating groove 110, so that the groove 118 can be used to install and fix the magnetic conductive member 13, but in practical application, the groove 118 also has It can be arranged at the bottom surface of the seat body 11 so that the magnetic conducting member 13 is installed at the back surface of the seat body 11.

Moreover, the magnetic element 23 of the rotating module 2 includes at least one set of staggered south magnetic regions 231 and north magnetic regions 232, and the number of the complex coils 32 of the circuit module 3 may be three or a multiple of three However, the number of complex coils 32 of the circuit module 3 cannot be equal to the total number of the south magnetic area 231 and the north magnetic area 232 of the magnetic element 23 (eg, the number of complex coils 32 of the circuit module 3 is six At this time, the magnetic element 23 cannot be three sets of the south magnetic area 231 and the north magnetic area 232. Since the three sets of the south magnetic area 231 and the north magnetic area 232 have six magnetic areas, the number of them will be equal to the number of the plural coils 32) , And the preset circuit layout and the driving element 33 on the circuit board 31 of the circuit module 3 can be the circuit layout and driving chip of the three-phase brushless motor, that is, by the housing 1, rotating the module 2 and the circuit module Group 3 to construct a three-phase brushless fan.

However, it is preferable that the seat body 11 of the housing 1 can be assembled and integrated with the positioning portion 122 of the cover body 12 through the coupling portion 117, but in practical applications, The cover 12 is assembled into one body with adhesive, hot melt, card-embedded structure, or other combination and assembly methods.

In addition, the circuit board 31 of the above-mentioned circuit module 3 is provided with a predetermined circuit layout on the surface. The two ends 321, the connecting section 322 and the driving element 33 of the plurality of coils 32 are permeable to surface mount technology (SMT) or through holes ( Through holes) and other welding methods to form an electrical connection state with the circuit board 31.

In addition, the shaft portion 113 of the housing 11 of the housing 1 is preferably implemented with a shaft core 1131, and the shaft connecting portion 22 of the rotary module 2 is concavely provided with a shaft connecting groove 221 for pivotally connecting the shaft core 1131, so that When the fan 21 of the rotating module 2 is running, the shaft portion 113 can be rotatably rotated by the shaft connecting portion 22, but in practical applications, the shaft portion 113 of the seat body 11 can also be connected to the shaft of the rotating module 2 The positions of the connection parts 22 are interchanged (in this case, the shaft connection groove will be on the seat body 11, and the shaft core will be on the fan 21; not shown in the figure), so that the fan 21 can also rotate in the seat body 11.

In addition, the side of the circuit board 31 of the circuit module 3 preferably has a side plate 313 extending outward, and the driving element 33 of the circuit module 3 is disposed on the surface of the side plate 313. However, in actual application, the circuit module 31 The circuit board 31 of the group 3 and the side board 313 can also be integrated into one body, so that the driving element 33 can be repositioned on the surface of the circuit board 31.

When this book is actually used, it can be installed in a computer, a notebook computer, a mobile phone, a micro projector, a small drone or other preset electronic devices (not shown in the figure), and the circuit module The circuit board 31 of 3 is electrically connected to an external power supply (such as a power supply in a notebook computer; not shown in the figure) for heat dissipation, and when the circuit board 31 of the circuit module 3 is powered on , The driving element on the side plate 313 of the circuit board 31 33 will drive the plural coil 32 to generate an alternating magnetic field, so that the plural coil 32 will alternately attract and repel at least one set of the south magnetic region 231 and the north magnetic region 232 of the magnetic element 23, and then drive the fan 21 to rotate, thereby setting The electronic device performs heat dissipation.

When the fan 21 of the rotating module 2 rotates, the first air vent 115 of the base 11 and the second air vent 121 of the cover 12 can be used as the air inlet, and the side of the base 11 is used. The opening 116 is used as an air outlet, so that the three-phase brushless fan has a blower-like lateral air supply function, but in practical applications, the plurality of first air vents 115 of the base 11 are used as the air outlet and the cover 12 The second air inlet 121 is used as an air inlet, and the opening 116 can be omitted. Moreover, the plurality of blades 212 of the fan 21 can be turned into an axial flow blade 212 type, thereby forming the structural design of the axial flow fan (Figure (Not shown), and further has a longitudinal air blowing function.

This creation has the following advantages:

(1) The circuit module 3 is located on the complex winding post 1141 of the winding part 114, and at least one wire is wound with three or multiple multiples of the plural coils 32, through which the plural coil 32 structure and winding method This eliminates the step of placing the plural coils 32 on the circuit board 31, and can reduce the number of the head ends 321, and does not require labor to solder the two head ends 321 of the multiple wires one by one on the circuit board 31, and then Reduce defective rate and assembly cost.

(2) The base 11 is composed of a metal base 111 and a plastic outer frame 112, which can increase the overall structural strength through the metal base 111 to avoid the base 11 bending when the fan 21 of the rotary module 2 rotates In the case of deformation, the fan 21 can be smoothly and reliably rotated.

(3) A side plate 313 is provided on one side of the circuit board 31 of the circuit module 3, and a driving element 33 is electrically connected to the surface of the side plate 313, that is, the position of the driving element 33 can be separated from the plural coils through the side plate 313 A distance of 32 to avoid affecting the operation of winding at least one wire on the plurality of winding poles 1141 to wind the plurality of coils 32, and because the driving element 33 is at a distance from the plurality of coils 32, it will not affect the assembly of the fan 21, so the fan 21 Without considering the thickness of the driving element 33 to increase the height, the overall height can be reduced to achieve the effect of making the three-phase brushless fan structure thin.

The above is only the preferred embodiment of this creation, and it does not limit the scope of the patent of this creation. Therefore, any simple modification and equivalent structural changes caused by the use of this creation description and the content of the drawings should be included in the same reason. Within the scope of this patent, Chen Ming.

In summary, the structure of the three-phase brushless fan of this creation is improved in use, in order to indeed achieve its efficacy and purpose, so this creation is a creation with excellent practicality, in order to meet the application requirements of new patents, according to the law To submit an application, I hope that the review committee will grant this case as soon as possible to protect the creator's hard work. If the review committee of the Jun Bureau has any doubts, please send me a letter and instruct the creator to try their best to cooperate and feel virtuous.

1‧‧‧Housing

11‧‧‧Body

110‧‧‧accommodation slot

111‧‧‧Metal base

112‧‧‧Plastic frame

113‧‧‧Shaft

1131‧‧‧Shaft

114‧‧‧Winding Department

1141‧‧‧Winding column

115‧‧‧ First vent

116‧‧‧ opening

117‧‧‧Joint

1171‧‧‧buckle

118‧‧‧groove

12‧‧‧cover

121‧‧‧The second vent

122‧‧‧Positioning Department

1221‧‧‧Snap

13‧‧‧Magnetic guide

2‧‧‧Rotating module

21‧‧‧Fan

212‧‧‧fan blade

23‧‧‧Magnetic components

230‧‧‧Through hole

231‧‧‧ Magnetic Region

232‧‧‧North Magnetic Zone

3‧‧‧ circuit module

31‧‧‧ circuit board

311‧‧‧Perforation

312‧‧‧Limit hole

313‧‧‧Side board

314‧‧‧Limited film

32‧‧‧coil

321‧‧‧ head end

322‧‧‧ connection section

33‧‧‧Drive components

34‧‧‧Metal contact

Claims (11)

A structure improvement of a three-phase brushless fan includes a housing, a rotating module and a circuit module, wherein: the housing is formed with an accommodating groove, and a shaft portion is provided at the bottom surface of the accommodating groove, and the shaft portion There is a winding part around the winding part, and the winding part is provided with a plurality of winding columns around the shaft part; the rotating module is a fan accommodated in the accommodating groove, and a pivotal connection is provided on one side of the fan The shaft connection part on the shaft part is provided with a magnetic element around the shaft connection part, and the magnetic element has at least one set of staggered south magnetic area and north magnetic area; the circuit module includes a circuit board, a plurality of coils and A driving element, wherein the circuit board is accommodated in the accommodating groove of the housing, and the circuit module is located on a plurality of winding poles and at least one wire is wound with a plurality of multiple coils in multiples of three or three, and the The quantity is not equal to the total amount of the south magnetic area and the north magnetic area, and then on the surface of the circuit board is electrically connected with a driving element that converts the direct current into a three-phase current and gives the complex coil three-phase current, and is provided on the surface of the circuit board There are at least four metal contacts for electrical connection of the plural coils. The structure improvement of the three-phase brushless fan as described in item 1 of the patent application scope, in which the housing is provided with a seat body, and an accommodating groove is recessed on the surface of the seat body, and then the accommodating groove of the seat body is opposite to the upper side Equipped with a cover. The structure improvement of the three-phase brushless fan as described in item 2 of the patent application scope, wherein the accommodating groove of the base body is provided with a plurality of first air vents around the winding part, and the accommodating groove side of the base body The wall surface is provided with an opening penetrating outward, and the cover body surface is provided with a second air vent. The structure improvement of the three-phase brushless fan as described in item 2 of the patent application scope, wherein the seat body has a metal base, and a plastic outer frame is assembled on the metal base. The structure improvement of the three-phase brushless fan as described in item 2 of the patent application scope, wherein the outer wall surface of the seat is provided with a joint part, and the joint part is located on the outer wall surface of the seat body with a plurality of buckle blocks, and the cover A positioning portion for positioning on the coupling portion is provided at the periphery of the body, and a plurality of buckles for holding the plurality of buckle blocks are bent at the positioning portion at the periphery of the cover body. The structure improvement of the three-phase brushless fan as described in item 1 of the patent application scope, wherein the shaft portion of the housing is located at the center of the bottom surface of the accommodating groove with a shaft core protruding, and the shaft connection portion of the rotary module is inside The concave is provided with a shaft connection groove for pivot connection of the shaft core. The structure improvement of the three-phase brushless fan as described in item 1 of the patent application scope, wherein the housing is provided with a groove between the shaft portion and the winding portion at the bottom of the receiving groove, and a guide is provided in the groove Magnetic parts. The structure improvement of the three-phase brushless fan as described in item 1 of the patent application scope, wherein the side surface of the fan of the rotary module is concavely provided with an engagement groove for the magnetic element to be placed, and is located at the center of the interior of the engagement groove A shaft connecting portion is provided, and a through hole for the shaft connecting portion is penetrated at the center of the magnetic element. The structure improvement of the three-phase brushless fan as described in item 1 of the patent application scope, wherein the circuit board surface of the circuit module is provided with a perforation through which the shaft connection part passes, and a ring is provided around the perforation A plurality of limit holes for the plurality of winding poles to pass through, and a plurality of limit plates which are sleeved on the plurality of winding poles are provided on the circuit board corresponding to the plurality of limit holes. The structure improvement of the three-phase brushless fan as described in item 1 of the patent application scope, wherein a side plate of the circuit module extends outward on one side of the circuit board, and a driving element is electrically connected to the surface of the side plate. The structure improvement of the three-phase brushless fan as described in item 1 of the patent application scope, where the The two ends of at least three coils are provided with two head ends which are electrically connected with the circuit board, and a connecting section is formed between at least two coils.

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