Patent ID: 7603866

Claim:
A thermoacoustic apparatus comprising; a first stack sandwiched between a first high-temperature-side heat exchanger and a first low-temperature-side heat exchanger; a second stack sandwiched between a second high-temperature-side heat exchanger and a second low-temperature-side heat exchanger in the inside of a loop tube, wherein a standing wave and a traveling wave are generated through self excitation by heating the first high-temperature-side heat exchanger, the second low-temperature-side heat exchanger is cooled by the standing wave and the traveling wave, or/and a standing wave and a traveling wave are generated by cooling the first low-temperature-side heat exchanger, and the second high-temperature-side heat exchanger is heated by the standing wave and the traveling wave, wherein a first working fluid is enclosed in the inside of the loop tube; and a mixing device for injecting and mixing a second working fluid different from the first working fluid after the first working fluid is enclosed in the inside of the loop tube.