THERMOACOUSTIC DEVICE

To provide a technique capable of suppressing deterioration of performance of a thermoacoustic device.SOLUTION: A thermoacoustic device includes: piping in which fluid is sealed; a first heat exchanger and a second heat exchanger each provided in the piping; a stack located in the piping and between the first heat exchanger and the second heat exchanger; a contact part disposed along the outer periphery of the first heat exchanger; and two or more pipelines in which heated liquid flows. The first heat exchanger includes: an annular heat transfer part exchanging heat with the pipelines; and a plurality of fin parts disposed on the inner side of the heat transfer part so that fluid can flow therein and warming the fluid by exchanging heat with the heat transfer part, the fin parts disposed in parallel with each other. The extending direction of the fin parts and the direction in which two first pipelines out of the two or more of pipelines face each other are approximately parallel with each other.SELECTED DRAWING: Figure 3 【課題】熱音響装置の性能の低下を抑制することができる技術の提供。【解決手段】流体が封入される配管と、それぞれ配管に設けられる第１熱交換器および第２熱交換器と、配管の内部かつ第１熱交換器と第２熱交換器の間に位置するスタックと、第１熱交換器の外周に沿うように配される接触部を備え、内部を熱せられた液体が流通する、２つ以上の管路と、を備え、第１熱交換器は、管路との間で熱交換を行う、環状の伝熱部と、伝熱部の内側に、流体が流通可能であるように配され、伝熱部と熱交換を行うことによって流体を温める複数のフィン部であって、互いに平行に並ぶように配されているフィン部と、を備え、フィン部がのびる方向と、２つ以上の管路のうちの２つである第１管路同士が向かい合う方向が、略平行である、熱音響装置。【選択図】図３