THERMOACOUSTIC DEVICE

WIPO Patent Application WO/2008/029521

A1

A thermoacoustic device capable of generating a sound wave in a shortened time and having a greatly improved energy conversion efficiency. The thermoacoustic device (1) comprises a pair of heat exchangers (41, 43) installed on the high- and low-temperature sides respectively, a second stack (42) installed between the heat exchangers (41, 43) and each having a conduction passage inside itself, and a loop tube (2) equipped with the heat exchangers (41, 43) and the stack (42). The sound energy generated in the loop tube (2) by a sound wave generator (3) is converted into heat energy by using the heat exchangers (41, 43) and the stack (42). A narrow part (21) whose inner diameter is relatively small is provided in a position where the sound particle velocity of the standing wave produced in the loop tube (2) takes on a maximum value. A branch tube (2e) for decreasing the sound particle velocity is connected to a position where the sound particle velocity of the standing wave produced in the loop tube (2) takes on a minimum value.

WATANABE YOSHIAKI (JP)
SAKAMOTO SHINICHI (JP)
YOSHIDA HIDEO (JP)
IMAMURA YOSUKE (JP)

PCT/JP2007/053155

March 13, 2008

February 21, 2007

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DOSHISHA (JP)
WATANABE YOSHIAKI (JP)
SAKAMOTO SHINICHI (JP)
YOSHIDA HIDEO (JP)
IMAMURA YOSUKE (JP)

F25B9/00

WO2006073007A1	2006-07-13
WO2004085934A1	2004-10-07

JP2005188846A	2005-07-14
JP2000088378A	2000-03-31
JP2002535597A	2002-10-22
JPH11344266A	1999-12-14
JP2006105009A	2006-04-20

KURU, Toru (Honeyano-cho Rokkaku-sagaru, Tominokoji-dori, Nakagyo-k, Kyoto-shi Kyoto 64, JP)

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