WO2011063609A1 - 具有防水、防盐雾功效的散热风扇 - Google Patents

具有防水、防盐雾功效的散热风扇 Download PDF

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Publication number
WO2011063609A1
WO2011063609A1 PCT/CN2010/001892 CN2010001892W WO2011063609A1 WO 2011063609 A1 WO2011063609 A1 WO 2011063609A1 CN 2010001892 W CN2010001892 W CN 2010001892W WO 2011063609 A1 WO2011063609 A1 WO 2011063609A1
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WO
WIPO (PCT)
Prior art keywords
stator
cover
heat
circuit board
fan
Prior art date
Application number
PCT/CN2010/001892
Other languages
English (en)
French (fr)
Inventor
郑俊明
毛晓荣
Original Assignee
上海山佳贸易有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN2009202639419U external-priority patent/CN201606280U/zh
Priority claimed from CN2010205563768U external-priority patent/CN201851378U/zh
Application filed by 上海山佳贸易有限公司 filed Critical 上海山佳贸易有限公司
Publication of WO2011063609A1 publication Critical patent/WO2011063609A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/068—Mechanical details of the pump control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • Cooling fan with waterproof and salt spray protection technology
  • the utility model relates to the technical field of heat dissipation equipment, in particular to a heat dissipation fan on an electronic product.
  • a cooling fan for an electronic product such as a cooling fan for a computer, a power supply, a communication device, etc.
  • a cooling fan for an electronic product generally includes a fan frame, a rotor blade, a circuit board, and a stator mounted on the circuit board, and a rotor type
  • the fan blade is sleeved on the outer circumference of the stator, and a magnetic ring body is arranged on the corresponding inner side surface of the rotor blade.
  • the magnetic ring body cooperates with the stator to drive the rotor blade to rotate, and the circuit board, the stator and the rotor blade are mounted on the fan blade.
  • the stator is composed of a plurality of iron chips combined and wound around the coil. When working, the coils on the stator are energized to generate a magnetic field, and the magnetic ring body acts to drive the rotor blades to rotate, thereby achieving heat dissipation.
  • the traditional cooling fan encapsulates the stator and the circuit board by means of potting to achieve water and salt spray prevention.
  • This structure has the following drawbacks: 1. Since the distance between the outer peripheral surface of the stator and the magnetic ring body is small, the thickness of the injection on the outer peripheral surface of the stator must be relatively thin, so that pinholes, bubbles, and the like may occur. Still not effective in waterproofing and salt spray prevention. 2. Since the thickness of the outer peripheral surface of the stator must be quite thin, the speed of injection is quite slow, and it takes a long time to release and bake, which greatly affects the yield, low efficiency and high cost. 3, glue
  • the body is poor in temperature resistance, easy to dissolve, aging, short in service life, and not environmentally friendly.
  • the purpose of the utility model is to overcome the defects of the prior art, and to provide a heat dissipation fan structure with simple structure, easy packaging, and good sealing performance with waterproof and salt spray prevention effects.
  • Another object of the present invention is to provide a heat dissipation fan structure having waterproof and salt spray resistance with good heat dissipation.
  • the cooling fan with waterproof and salt spray protection includes a fan frame, a rotor blade, a circuit board and a stator mounted on the circuit board, and the rotor blade is sleeved on the outer circumference of the stator, and corresponding to the rotor blade
  • a magnetic ring body is arranged on the inner side surface, and the magnetic ring body cooperates with the stator to drive the rotor blade to rotate, the circuit board, the stator and the rotor blade are mounted on the fan frame, and the outer cover covers at least the stator and is opposite to the magnetic ring body.
  • the outer peripheral surface has a space between the outer cover and the magnetic ring body.
  • the outer cover is in the shape of a sleeve that penetrates vertically, and the inner shape of the sleeve is exactly the same as the outer circumference of the stator.
  • the outer cover may also be composed of an upper cover and a lower cover, the upper cover has a sleeve portion to cover the stator, and the lower cover is provided with a receiving portion for receiving the circuit board, and the upper cover and the lower cover are butted The circuit board and the stator are covered together; the upper cover has an inverted U shape, and a convex portion is left at the port The edge of the lower cover is concave, and the upper end surface engages the edge of the upper cover.
  • the further improvement of the utility model is that the heat-conducting material is disposed on the mounting side of the electronic component on the circuit board, and the heat-conducting material is closely attached to the surface of the electronic component on the circuit board, and the heat generated by the electronic component is transmitted to the bridge on the outer cover.
  • the heat conductive material may be a soft sheet embedded between the outer cover and the circuit board, and is pressed by the electronic components of the outer cover and the circuit board; or the heat conductive material is a thermal conductive adhesive, directly coated on the circuit board, and the outer cover The corresponding inner side surface is attached to the heat conductive material; the heat conductive material has a thermal conductivity of 0.01 W/mk or more.
  • the present invention is further improved in that: the sleeve portion of the upper cover is further provided with a vertically downward casing, the lower casing is sleeved on the outer circumference of the convex column on the fan frame; and the inner middle portion of the lower cover is further provided There is a vertical upward casing, and the upper casing is also sleeved on the outer circumference of the convex column on the fan frame.
  • a cylindrical sealing ring is arranged on the convex column of the fan frame, and the two sealing rings are respectively distributed on the upper and lower sides of the upper sleeve of the upper cover and the upper sleeve of the lower cover.
  • the lower sleeve of the upper cover and the upper sleeve of the lower cover are sleeved to overlap the column of the fan frame, and the overlapping portions are pressed and pressed together.
  • the utility model uses the formed outer cover to cover the outer peripheral surface of the stator opposite to the magnetic ring body, thereby reducing the injection of glue at the portion, and also increasing the heat conduction of the heat conductive material, thereby obtaining the following beneficial effects:
  • the outer cover is pre-formed and the quality is guaranteed. It avoids the occurrence of pinholes and bubbles generated by the injection, thus achieving better waterproof and salt spray protection and protecting the stator.
  • the heat conductive material transfers the heat generated by the electronic components on the circuit board to the outer cover in time, and then spreads by the outer cover to achieve heat dissipation protection of the electronic components and prolong the service life of the cooling fan.
  • the heat conductive material adheres to the surface of the electronic component to reduce air retention and improve the heat conduction environment on the surface of the circuit board, thereby improving the heat dissipation effect of the heat dissipation fan itself.
  • the structure is simple, scientific and reasonable, the investment cost is low, and the operation and operation are simple, the maintenance and repair is very convenient, and the operation rate and operability of the equipment are greatly improved.
  • FIG. 1 is a schematic structural view of an embodiment of the present invention
  • Figure 2 is a schematic exploded view of the partial structure of Figure 1;
  • Figure 3 is a schematic structural view of another embodiment of the present invention.
  • Figure 4 is a perspective view showing a partial structure of the embodiment of Figure 3;
  • Figure 5 is a schematic view showing another embodiment mode of the embodiment of Figure 3;
  • Figure 6 is an enlarged schematic view showing a partial structure of Figure 5.
  • FIG. 1 to FIG. 6 are structural diagrams of a preferred embodiment of the present invention.
  • the utility model relates to a cooling fan with waterproof and salt spray prevention effects, including a fan frame and a rotor fan. a leaf 2, a circuit board 3, and a stator 4 mounted on the circuit board 3,
  • the rotor blade 2 is sleeved on the outer circumference of the stator 4, and a magnetic ring body 5 is provided on the corresponding inner side surface of the rotor blade 2.
  • the magnetic ring body 5 surrounds the outer circumference of the stator 4, and cooperates with the stator 4 to drive the rotor blade 2 to rotate.
  • the circuit board 3, the stator 4 and the rotor blade 2 are mounted on the fan frame 1.
  • the middle part of the fan frame 1 has a convex column 11 in the middle, and the column 11 passes through the hole in the circuit board 3 and the stator 4, in the column 11 is internally provided with a bearing 13 for inserting and mounting with the rotating shaft 21 of the rotor blade 2.
  • the heat radiating fan further includes a cover 6 that covers at least the outer peripheral surface of the stator 4 opposite to the magnetic ring body 5, and a space is left between the outer cover 6 and the magnetic ring body 5.
  • the outer cover 6 of the present invention may be in the shape of a sleeve which is vertically penetrated, and the shape and size of the inner hole of the sleeve coincide with the outer circumference of the stator 4.
  • the outer cover 6 is sleeved on the stator 4, and then the circuit board 3 and the stator 4 are assembled into the fan frame 1. Then, the upper end of the stator 4 and the exposed portion of the circuit board 3 are encapsulated by the glue injection 8, and the glue 8 and the outer cover 6 are together. Sealed to achieve waterproof and salt spray protection.
  • the structure is tightly covered on the outer peripheral surface of the stator 4 opposite to the magnetic ring body 5, and the cover 6 is not required to be injected, thereby avoiding the occurrence of pinholes and bubbles generated by the injection, and also reducing the demolding and baking time, and assembling. High efficiency and low cost.
  • the outer cover 6 protects the outer peripheral surface of the stator 4 as a coating layer, and then is injected at the upper end of the stator 4 and the exposed portion of the circuit board 3. Since the glue injection space is large, the thickness of the glue injection is limited, so that the injection is relatively easy, and Effective quality assurance can also guarantee the quality of assembly and reduce the difficulty of the production process.
  • the outer cover 6 is composed of an upper cover 61 and a lower cover 62.
  • the upper cover 61 has an inverted U shape and has a sleeve portion 611 for covering the stator 4, a convex edge 612 is left at the port of the sleeve portion 611, and a vertical direction is provided in the sleeve portion 611.
  • the lower sleeve 613 and the lower sleeve 613 are sleeved on the outer circumference of the convex column 11 on the fan frame 1.
  • the lower cover 62 has a concave shape, a receiving portion 621 formed in the inner middle portion and an upper sleeve 622 vertically upward.
  • the receiving portion 621 is received by the circuit board 3.
  • the upper sleeve 622 is sleeved on the convex column of the fan frame 1. 11 outside the week.
  • the upper end surface of the lower cover 62 engages the edge 612 of the upper cover, and then is connected by high-frequency welding, so that the outer cover 6 covers the circuit board 3 and the stator 4, the assembly is quite quick, the process time is short, and the manufacturing process is difficult. Reduce demoulding and baking time, high assembly efficiency and low cost.
  • the electronic component mounting side (shown as the lower bottom side) on the circuit board 3 is provided with a heat conductive material 7, and the heat conductive material 7 is in close contact with -
  • the surface of the electronic component on the wiring board 3 forms a bridge for transferring heat generated by the electronic component to the outer cover 6, and the thermal conductivity of the heat conductive material 7 is 0.01 W/mk or more.
  • the heat generated by the electronic components on the circuit board is transmitted to the outer cover 6 through the heat conductive material 7 in time, and then diffused by the outer cover 6, preventing the temperature rise of the inner space of the outer cover 6 from being too high, thereby achieving heat dissipation, protecting electronic components, and extending The life of the cooling fan.
  • the heat conductive material 7 is a flexible sheet, which is embedded between the outer cover 6 and the circuit board 3, and is pressed by the electronic components on the outer cover 6 and the circuit board 3, so that after the assembly, the heat conductive material 7 is closely attached.
  • the surface of the electronic component on the circuit board 3 satisfies the heat conduction requirement; and when disassembled, the heat conductive material 7 is a soft sheet, which can be removed conveniently, which is convenient for maintenance and repair.
  • the heat conductive material 7 can also be in the form of a thermal conductive adhesive, which is directly coated on the circuit board 3, that is, filled, and then the outer cover 6 is assembled, so that the corresponding inner side of the outer cover 6 is attached to the heat conductive material 7.
  • the utility model can also be designed as follows:
  • the heat conductive material 7 forms a part of the outer cover 6, that is, all or part of the outer cover 6 is formed by a heat conductive material, and the outer cover 6 is coated and adheres to the surface of the electronic component on the circuit board 3 to meet the heat conduction requirement, thereby achieving rapid heat dissipation effect. Protects electronic components and extends the life of the cooling fan.
  • the cylindrical column 11 on the fan frame is provided with upper and lower spaced seal rings 12, and the two seal rings 12 are respectively distributed on the lower sleeve 613 and the lower cover of the upper cover.
  • the upper and lower sides of the butt joint of the sleeve 622, the sealing ring 12 is sufficiently blocked to prevent moisture from penetrating into the circuit board 3 and the stator 4, thereby further improving the waterproof and salt spray preventing effects.
  • the utility model can also adopt the following scheme, and lengthen the upper sleeve 613 of the upper cover and/or the upper sleeve 622 of the lower cover, so that after assembly, the upper cover
  • the lower sleeve 613 and the upper sleeve 622 of the lower cover are sleeved to overlap the column 11 of the fan frame, and the overlapping portions are pressed and pressed together, thereby preventing moisture from penetrating into the circuit board 3 through the bonding position and
  • the stator 4 further enhances the waterproof and salt spray prevention effect.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Description

具有防水、 防盐雾功效的散热风扇 技术领域：
本实用新型涉及散热设备技术领域，特指一种电子产品上的散热 风扇。
背景技术：
目前， 用于电子产品上的散热风扇， 如用于电脑、 电源器、 通讯 设备等产品上散热风扇， 一般包括扇框、 转子式扇叶、 线路板及安装 在线路板上的定子， 转子式扇叶套设于定子外周， 并于转子式扇叶的 相应内侧面上设有磁环体，磁环体配合定子工作而驱动转子式扇叶转 动， 线路板、 定子及转子式扇叶安装于扇框上。 定子是由多数铁芯片 组合后绕上线圈构造， 工作时， 定子上的线圈通电， 产生磁场， 作用 磁环体而驱动转子式扇叶转动， 从而达到散热。
传统的散热风扇， 是通过灌胶方式封装定子及线路板， 以达到防 水、 防盐雾。 这种结构存在如下缺陷： 1、 由于定子外周面与磁环体 之间的间距较小， 使得在定子外周面注胶的厚度必须相当薄， 因而也 就会出现针孔、 气泡等不良情况， 还是没能有效地防水、 防盐雾。 2、 由于定子外周面注胶的厚度必须相当薄， 因而注胶的速度相当慢， 脱 模及烘烤也需要较长时间， 极大影响产率， 效率低， 成本高。 3、 胶
1
确认本 体耐温性差， 易溶化、 老化， 使用寿命短， 且不环保。
本申请人有鉴于上述习知散热风扇之缺失与不便之处，秉持着研 究创新、精益求精之精神， 利用其专业眼光和专业知识， 研究出一种 具有防水、 防盐雾功效的散热风扇。
实用新型内容：
本实用新型的目的在于克服现有技术的缺陷， 提供一种结构简 单， 易封装， 且密封性好的具有防水、 防盐雾功效的散热风扇结构。
本实用新型再一目的是提供一种具有良好散热性的具有防水、防 盐雾功效的散热风扇结构。
为达到上述目的， 本实用新型采用如下技术方案：
具有防水、 防盐雾功效的散热风扇， 包括有扇框、 转子式扇叶、 线路板及安装在线路板上的定子， 转子式扇叶套设于定子外周， 并于 转子式扇叶的相应内侧面上设有磁环体，磁环体配合定子工作而驱动 转子式扇叶转动， 线路板、 定子及转子式扇叶安装于扇框上， 一外罩 至少包覆定子之与磁环体相对的外周面， 外罩与磁环体之间留有间 距。
上述方案中， 所述外罩系为一上下贯通的套筒形， 套筒内孔的形 状、 大小恰好与定子外周一致。
上述方案中，所述外罩也可由上盖和下盖组成，上盖有一套筒部， 以套住定子， 而下盖设有容纳部， 供线路板容置， 上盖和下盖对接后 将线路板和定子一起包覆于内； 上盖呈倒 U形， 在端口处留有外凸 的边缘， 而下盖呈凹形， 上端面接合上盖的边缘。
本实用新型进一步改进是：于线路板上的电子元件安装侧设有导 热物质， 导热物质紧贴线路板上的电子元件的表面， 形成电子元件产 - 生的热量传递到外罩上的桥梁。 其中， 导热物质可以为软性片材， 嵌 设在外罩与线路板之间，受到外罩及线路板上的电子元件挤压；或者， 导热物质为导热胶， 直接涂覆在线路板上， 外罩相应的内侧面贴在导 热物质上； 所述导热物质的导热系数在 0.01W/m-k以上。
本实用新型进一步改进是：所述上盖的套筒部内还设有垂直向下 的下套管， 下套管套接于扇框上凸的筒柱外周； 所述下盖的内中部还 设有垂直向上的上套管， 上套管也套接于扇框上凸的筒柱外周。
于扇框上凸的筒柱上设有上下间隔的密封环，两密封环分别分布 在上盖的下套管和下盖的上套管对接位的上下方。
所述上盖的下套管和下盖的上套管套接扇框的筒柱后留有重叠 部分， 重叠部分受挤压紧贴在一起。
本实用新型是用成型好的外罩去包覆定子之与磁环体相对的外 周面， 减少在该部位注胶， 同时还增加有导热物质的导热， 由此获得 如下有益效果：
1、 外罩预先成型好， 质量有保证， 避免注胶所产生的针孔、 气 泡之情况发生， 因而达到更好地防水、 防盐雾功效， 保护定子。
2、 降低制作工艺难度， 减少脱模及烘烤时间， 组装效率高， 成 本低。 3、 克服胶体易溶化、 老化之缺陷， 使用寿命更长。
4、 导热物质及时将线路板上的电子元件产生的热量传递到外罩 上， 再由外罩扩散， 达到散热保护电子元件， 延长散热风扇的使用寿 命。
5、 导热物质紧贴电子元件的表面， 减少空气滞留， 改善线路板 表面的导热环境， 由此提升散热风扇自身内部的散热功效。
6、 结构简单， 科学合理， 投资成本低， 且操作运行简便， 维护 检修十分方便， 大大提高了设备的运行率和可操作性。
附图说明：
附图 1为本实用新型其一实施例结构示意图；
附图 2为图 1之局部结构分解示意图；
附图 3为本实用新型另一实施例结构示意图；
附图 4为图 3之实施例的局部结构立体示意图；
附图 5为图 3之实施例的另一实施模式示意图；
附图 6为图 5之局部结构放大示意图。
具体实施方式：
为了使审査委员能对本实用新型之目的、特征及功能有更进一步 了解， 兹举较佳实施例并配合图式详细说明如下：
请参阅图 1~6 所示， 系为本实用新型之较佳实施例的结构示意 图， 本实用新型是有关一种具有防水、 防盐雾功效的散热风扇， 包括 有扇框 1、 转子式扇叶 2、 线路板 3及安装在线路板 3上的定子 4， 转子式扇叶 2套设于定子 4外周，并于转子式扇叶 2的相应内侧面上 设有磁环体 5。 磁环体 5环绕在定子 4外周， 配合定子 4工作而驱动 转子式扇叶 2转动。 线路板 3、 定子 4及转子式扇叶 2安装于扇框 1 上， 扇框 1内中部有凸起的筒柱 11， 筒柱 11穿设线路板 3及定子 4 之中孔， 在筒柱 11内部设有轴承 13， 以配合转子式扇叶 2之转轴 21 插入安装。 该散热风扇还包括一外罩 6， 外罩 6至少包覆定子 4之与 磁环体 5相对的外周面， 外罩 6与磁环体 5之间留有间距。
图 1和图 2所示，本实用新型中的外罩 6可以是一上下贯通的套 筒形， 套筒内孔的形状、 大小恰好与定子 4外周一致。 组装时， 以外 罩 6套住定子 4， 然后将线路板 3和定子 4组装到扇框 1中， 再采用 注胶 8将定子 4上端及线路板 3外露部分封装，注胶 8和外罩 6一起 密封， 达到防水、 防盐雾功效。 该结构在定子 4之与磁环体 5相对的 外周面以外罩 6紧密包覆， 不用注胶， 避免注胶所产生的针孔、气泡 之情况发生， 也减少脱模及烘烤时间， 组装效率高， 成本低。 外罩 6 作为包覆层保护定子 4外周面，然后在定子 4上端及线路板 3外露部 分注胶， 由于注胶空间较大， 注胶厚度受限制小， 因而注胶也就相对 容易， 且还有效保证质量， 同样也可以保证组装质量， 达到降低制作 工艺难度的功效。
图 3、 图 4、 图 5及图 6所示， 所述外罩 6由上盖 61和下盖 62 组成。 上盖 61呈倒 U形， 具有一套筒部 611， 以套住定子 4， 在套 筒部 611的端口处留有外凸的边缘 612， 及套筒部 611内设有垂直向 下的下套管 613， 下套管 613套接于扇框 1上凸的筒柱 11外周。 所 述下盖 62呈凹形，内中部形成的容纳部 621及垂直向上的上套管 622， 容纳部 621供线路板 3容置， 上套管 622套接于扇框 1上凸的筒柱 11外周。 组装时， 下盖 62的上端面接合上盖的边缘 612， 再以高週 波焊接连接，即可实现外罩 6包覆线路板 3和定子 4，组装相当快捷， 工艺时间短，降低制作工艺难度，减少脱模及烘烤时间，组装效率高， 成本低。
图 3、 图 4、 图 5及图 6所示的实施例中， 于线路板 3上的电子 元件安装侧 （图中所示为下底侧） 设有导热物质 7， 导热物质 7紧贴 - 线路板 3上的电子元件的表面，形成电子元件产生的热量传递到外罩 6上的桥梁， 导热物质 7的导热系数在 0.01W/m-k以上。 工作时， 线 路板上的电子元件产生的热量通过导热物质 7及时的传递到外罩 6 上， 再由外罩 6扩散， 防止外罩 6内部空间的温升过高， 达到散热功 效， 保护电子元件， 延长散热风扇的使用寿命。
图 4所示， 导热物质 7为软性片材， 嵌设在外罩 6与线路板 3之 间， 受到外罩 6及线路板 3上的电子元件挤压， 从而达到组装后， 导 热物质 7紧贴线路板 3上的电子元件的表面， 满足导热要求； 而拆卸 时， 导热物质 7为软性片材， 可相当方便地取下， 利于维护检修。 当 然， 本实用新型中， 导热物质 7也可为导热胶形式， 采用直接涂覆在 线路板 3上， 即为充胶， 随后组装外罩 6， 使外罩 6相应的内侧面贴 在导热物质 7上即可。在上述方案的指导下，本实用新型还可设计为： 导热物质 7形成外罩 6上的一部分，即外罩 6的全部或局部由导热材 料成型制作， 外罩 6包覆后紧贴线路板 3上的电子元件的表面， 满足 导热要求， 达到快速散热功效， 以保护电子元件， 延长散热风扇的使 用寿命。
图 3所示， 为了进一步做好防水密封， 在扇框上凸的筒柱 11上 设有上下间隔的密封环 12，两密封环 12分别分布在上盖的下套管 613 和下盖的上套管 622对接位的上下方， 密封环 12充分阻隔， 防止水 份渗入线路板 3和定子 4， 进一步提升防水、 防盐雾功效。
图 5、 6所示， 为了进一步做好防水密封， 本实用新型还可采用 如下方案， 加长上盖的下套管 613和 /或下盖的上套管 622， 这样， 组 装后， 上盖的下套管 613和下盖的上套管 622套接扇框的筒柱 11后 留有重叠部分， 重叠部分受挤压紧贴在一起， 由此达到防止水份通过 结合位渗入线路板 3和定子 4， 进一步提升防水、 防盐雾功效。
当然， 以上实施例仅为本实用新型的较佳实施方式， 并非以此限 定本实用新型的实施范围， 故， 凡是依照本实用新型之原理做等效变 化或修饰， 均应涵盖于本实用新型的保护范围内。

Claims

权 利 要 求 书
1、 具有防水、 防盐雾功效的散热风扇， 包括有扇框 （1)、 转子 式扇叶 （2)、 线路板（3)及安装在线路板（3)上的定子 （4)， 转子 式扇叶 （2) 套设于定子 （4) 外周， 并于转子式扇叶 （2) 的相应内 侧面上设有磁环体（5)， 磁环体（5)配合定子（4)工作而驱动转子 式扇叶 （2) 转动， 线路板 （3)、 定子 （4) 及转子式扇叶 （2) 安装 于扇框（1) 上， 其特征在于： 还包括一外罩 （6)， 外罩（6)至少包 覆定子（4)之与磁环体（5)相对的外周面， 外罩（6)与磁环体（5) 之间留有间距。 .
2、 根据权利要求 1所述的具有防水、 防盐雾功效的散热风扇， 其特征在于： 所述外罩 （6) 系为一上下贯通的套筒形， 套筒内孔的 形状、 大小恰好与定子 （4) 外周一致。
3、 根据权利要求 1所述的具有防水、 防盐雾功效的散热风扇， 其特征在于： 所述外罩 （6) 由上盖 （61) 和下盖 （62) 组成， 上盖
(61) 有一套筒部 （611)， 以套住定子（4)， 而下盖（62) 设有容纳 部， 供线路板 （3) 容置， 上盖 （61) 和下盖 （62) 对接后将线路板
(3) 和定子 （4) 一起包覆于内； 上盖 （61) 呈倒 U形， 在端口处 留有外凸的边缘（612)， 而下盖（62)呈凹形， 上端面接合上盖的边 缘 （612)。
4、 根据权利要求 3所述的具有防水、 防盐雾功效的散热风扇， 其特征在于： 于线路板（3)上的电子元件安装侧设有导热物质（7), 导热物质（7)紧贴线路板（3 )上的电子元件的表面， 形成电子元件 产生的热量传递到外罩 （6) 上的桥梁。
5、 根据权利要求 4所述的具有防水、 防盐雾功效的散热风扇， 其特征在于： 导热物质（7) 为软性片材， 嵌设在外罩（6)与线路板
(3 ) 之间， 受到外罩 （6) 及线路板 （3 ) 上的电子元件挤压。
6、 根据权利要求 4所述的具有防水、 防盐雾功效的散热风扇， 其特征在于： 导热物质 （7) 为导热胶， 直接涂覆在线路板 （3 ) 上， 外罩 （6) 相应的内侧面贴在导热物质 （7) 上。
7、 根据权利要求 4~6中任意一项所述的具有防水、 防盐雾功效 的散热风扇， 其特征在于： 导热物质 （7) 的导热系数在 0.01W/m-k 以上。
8、 根据权利要求 3所述的具有防水、 防盐雾功效的散热风扇， 其特征在于： 所述上盖 （61 ) 的套筒部 （611 ) 内还设有垂直向下的 下套管 （613 )， 下套管 （613 ) 套接于扇框 （1 ) 上凸的筒柱（11 )外 周； 所述下盖（62) 的内中部还设有垂直向上的上套管（622)， 上套 管 （622) 也套接于扇框 （1 ) 上凸的筒柱 （11 ) 外周。
9、 根据权利要求 8所述的具有防水、 防盐雾功效的散热风扇， 其特征在于：于扇框上凸的筒柱（ 11 )上设有上下间隔的密封环（ 12 )， 两密封环（ 12)分别分布在上盖的下套管（613 )和下盖的上套管（622) 对接位的上下方。
10、 根据权利要求 8所述的具有防水、 防盐雾功效的散热风扇， 其特征在于： 所述上盖的下套管（613 )和下盖的上套管（622)套接 扇框的筒柱 （11 ) 后留有重叠部分， 重叠部分受挤压紧贴在一起。
PCT/CN2010/001892 2009-11-27 2010-11-26 具有防水、防盐雾功效的散热风扇 WO2011063609A1 (zh)

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CN2010205563768U CN201851378U (zh) 2010-09-30 2010-09-30 防水型散热风扇的导热结构
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6050786A (en) * 1998-08-19 2000-04-18 Delta Electronics, Inc. Heat dissipation structure of a fan unit
CN201125876Y (zh) * 2007-12-05 2008-10-01 东莞寮步新旧围永立电机厂 一种防水防盐雾的散热风扇
CN201606280U (zh) * 2009-11-27 2010-10-13 东莞市禾源电子有限公司 具有防水、防盐雾功效的散热风扇

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6050786A (en) * 1998-08-19 2000-04-18 Delta Electronics, Inc. Heat dissipation structure of a fan unit
CN201125876Y (zh) * 2007-12-05 2008-10-01 东莞寮步新旧围永立电机厂 一种防水防盐雾的散热风扇
CN201606280U (zh) * 2009-11-27 2010-10-13 东莞市禾源电子有限公司 具有防水、防盐雾功效的散热风扇

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