Fine Particle Capture Device
A technology of fine particles and capture devices, which is applied in the field of ultrasonic applications, can solve problems such as troublesome application, difficulty in air flowing through the filter, and reduced effect of the filter, achieving low cost and good reliability
Inactive Publication Date: 2015-09-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
The disadvantage of this dust removal method is that when the filter screen is used for too long, the filter screen will be blocked by dust, and it is difficult for the air to flow through the filter screen.
Therefore, for this kind of dust removal device, it is necessary to replace or clean the filter screen every once in a while, which is troublesome in application, and for fine particles such as PM2.5 with a small particle size, the effect of the filter screen will be further reduced
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[0018] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0019] Please refer to Figure 1 to Figure 2 As shown, the fine particle trapping device of the present invention includes an ultrasonic transducer 1 , an adhesive paper 3 and a reflection plate 5 . The ultrasonic transducer 1 is used for ultrasonic excitation, the sticky paper 3 is stuck on the reflection plate 5, and the piezoelectric element 7 is stuck on the back of the radiation surface 6 for ultrasonic excitation, so as to reduce the volume of the device , the ultrasonic transducer 1 vibrates by the inverse piezoelectric effect of the piezoelectric element 7 .
[0020] The ultrasonic transducer 1 in the fine particle trapping device of the present invention is suspended above the reflection plate 5 by ropes or elastic elements. The thickness of the gap layer between the ultrasonic transducer 1 and the reflection plate 5 varies unifo...
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The invention relates to a fine particle capturing apparatus, wherein linear and non-linear effects (large acceleration of gas vibration and sound radiation pressure and acoustic flow generated by an acoustic field) generated by ultrasonic transducer vibration is adopted to capture fine particles in air, and a filtration screen and a nanometer absorption layer are not arranged in the fine particle capturing apparatus. According to the present invention, depending on linear and non-linear effects (large acceleration of gas vibration and sound radiation pressure and acoustic flow generated by the acoustic field) generated by vibration of gas in a gap between a radiation surface and a deflection plate of the ultrasonic transducer, the fine particles contained in the air in the gap are blown to adhesive paper of the deflection plate so as to be captured; the problem that the filtration screen is adopted to remove dust can not be generated; and the apparatus has characteristics of no noise, good reliability, miniaturization, low cost, and easy carrying.
Description
technical field [0001] The present invention relates to a fine particle capture device, in particular to a device based on an ultrasonic transducer that uses the large acceleration of gas vibration and the acoustic radiation pressure generated by the sound field and the linear and nonlinear effects of acoustic flow vibration to capture fine particles in the air. A particle capturing device belongs to the field of ultrasonic application. Background technique [0002] As the problem of PM2.5 is becoming more and more serious, how to reduce its concentration has become an important issue in environmental governance. How to remove PM2.5 in a high-efficiency, low-cost and non-polluting way is a major technical challenge we face. [0003] At present, there are already some dust removal devices for the problem of PM2.5 in the air. Chinese patent 201210055707.3 discloses a PM2.5 integrated air purification treatment device, which uses a nano-adsorption layer and a filter to remove ...
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IPC IPC(8): B01D49/00
Inventor 胡俊辉王燕俊
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS