Thermoacoustic device
A technology of thermo-acoustic and thermo-acoustic components, applied in the direction of sensors, electrical components, sensor parts, etc., can solve the problems of easy damage of carbon nanotube films, inability to heat the surrounding air, and inability to change the density of the surrounding air.
Active Publication Date: 2010-07-21
BEIJING FUNATE INNOVATION TECH
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Problems solved by technology
However, when the carbon nanotube film is suspended, the carbon nanotube film is easily damaged
When the carbon nanotube film is completely attached to the surface of the glass plate, most of the heat emitted by the carbon nanotube film is conducted away by the glass plate, and cannot be used to heat the surrounding air, so that the density of the surrounding air cannot be changed to produce sound.
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Embodiment Construction
[0025] A thermoacoustic device according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
[0026] see figure 1 and figure 2 , The first embodiment of the present invention provides a thermoacoustic device 200 , which includes a substrate 202 , a thermoacoustic element 204 , a first electrode 206 and a second electrode 216 . The first electrode 206 and the second electrode 216 are spaced apart and electrically connected to the thermoacoustic element 204 . A surface 230 of the substrate 202 has at least one concave portion 208 , and the thermoacoustic element 204 is located on the side of the substrate 202 with the concave portion 208 and faces the surface 230 of the substrate 202 . The recess 208 has an opening on the surface 230, and the thermoacoustic element 204 has a first area 210 and a second area 220, and the first area 210 and the second area 220 are located in the first area. between the first...
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The invention relates to a thermoacoustic device, which comprises a substrate with a surface, a thermoacoustic element positioned on one side of the substrate and facing the surface of the substrate, and first and second electrodes which are arranged at interval and electrically connected to the thermoacoustic element, wherein the surface of the substrate is provided with a concave part of which the opening is toward the thermoacoustic element; the thermoacoustic element is provided with a first area and a second area, which are positioned between the first and second electrodes; the thermoacoustic element in the first area covers the opening of the concave part and is suspended; and the thermoacoustic element in the second area contacts the surface of the substrate. The thermoacoustic device has the advantages of relatively good durability and sounding effect.
Description
technical field [0001] The invention relates to a thermoacoustic device. Background technique [0002] On October 29, 2008, Fan Shoushan et al. disclosed a thermoacoustic device using thermoacoustic effect, please refer to the document "Flexible, Stretchable, Transparent Carbon Nanotube Thin Film Loudspeakers", ShouShan Fan, et al., Nano Letters, Vol .8(12), 4539-4545 (2008). The thermoacoustic element uses carbon nanotube film as a thermoacoustic element, because the carbon nanotube film has a large specific surface area and a very small heat capacity per unit area (less than 2×10 -4 Joules per square centimeter Kelvin), the thermoacoustic element can emit a sound that can be heard by the human ear, and has a wide range of sounding frequencies (100Hz-100kHz). In the thermoacoustic device, the carbon nanotube film can be suspended or attached to the surface of a glass plate. However, when the carbon nanotube film is suspended, the carbon nanotube film is easily damaged. ...
Claims
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IPC IPC(8): H04R23/00
Inventor 刘亮潜力冯辰
Owner BEIJING FUNATE INNOVATION TECH