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家用加濕器的超聲霧化，超聲波系統的關鍵作用

返回列表 來源：发布日期： 2021.08.06

提起超声波，大多数人第一反应就是医疗应用上的B超，其实超声波的应用范围十分广泛，靈科超聲波最常为大家介绍的就是应用在焊接上的超声波焊接技术。今天靈科超聲波为大家分享一下超声波在醫療行業上的应用-超声波雾化。

超聲霧化概述：在超声作用下，液体在气相中分散并在液体表面形成细雾飞逸的过程称超聲霧化。其空化作用是超声成雾的主要原因。

雾化速度和功率密切相关，功率大则产生的雾量多。还与成雾的液体表面张方、密度、粘度、蒸气压、温度等因素有关。图5.11表明雾滴的直径与頻率的关系曲线。表5. 5列出了超声頻率与采用的换能器形状和霧粒直徑以及这种頻率下的雾化器的用途的关系。

頻率	聲輻射器形狀	霧粒直徑	用途
10-100kHz	夾心壓電換能器磁致伸縮換能器	120-30μm	促進燃燒金屬粉末制取
100-300kHz	圓形或方形金屬共振板	30- 15μm	小型吸入器
300—800kHz	圓形壓電片厚度振動	15-7μm	醫用吸入器
800kHz-3MHz	圓形壓電片厚度振動	7 -2μm	火焰光譜分析醫用吸入器家用加濕器

（表5.5 超声波頻率与雾粒的直径关系）

低频用的超聲霧化装置由于常用在燃料油燃烧或金屬粉末制取。因此，功率要求大，所以在换能器末端还要加一节变幅杆，以放大振幅，其液体入口位于变幅杆的位移节点。其端点的阀块用于调节雾滴和雾量。如图5. 12所示。低频超声波雾化装置由超声波发生器、超聲波換能器、变幅杆、弹簧、阀块组成。高频用的超聲霧化器常用于家用加濕器和醫用吸入器。其雾化装置如图5. 13所示。

医用吸入超聲霧化器和家用超声加湿器：

医用吸入超聲霧化器和家用超声加湿器其工作原理基本相同。医用吸入超聲霧化器使用了一只吸入面罩，其它组成都相同。图5. 14为其工作原理及组成。当超声波发生器与其换能器产生自激振荡时，换能器向水中辐射强烈的超声波，在水与空气界面上，水在超声波的作用下向气相中分散，形成无数雾滴。这时在鼓风机的鼓动下由气流将雾从雾化杯中带出，从而形成升腾不止的雾气。

超声波塑料焊接機廣泛運用在塑料、無紡布、包裝、打印耗材、醫療、電子電器、汽車等多個領域。靈科超聲波 可根据厂家需求定制非标设备，为客户供应珠海超聲波、中山超聲波焊接機、江門超聲波塑焊机、阳江超音波设备配件等。

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家用加濕器的超聲霧化，超聲波系統的關鍵作用

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