| 摘要 |
A thermoacoustic device 1 is provided which has in a loop tube 2 , a first stack 3 a provided between a first high-temperature side heat exchanger 4 and a first low-temperature side heat exchanger 5 , and a second stack 3 b provided between a second high-temperature side heat exchanger 6 and a second low-temperature side heat exchanger 7 , so that heat at the first stack side is prevented from being transported to the second stack side even when a large acoustic wave is generated in the tube. In the above device, self-excited standing and traveling waves are generated by heating the first high-temperature side heat exchanger 4 , and by the standing and traveling waves, the second low-temperature side heat exchanger 7 is cooled. As a heat transportation suppression means 80 which suppresses heat transportation from the first stack 3 a to the second stack 3 b side, a piezoelectric film 81 , an acoustic wave generator 82 , or a Helmholtz resonator 83 is provided to suppress an acoustic streaming and/or a direct-current type flow, such as convection, of a working fluid.
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