IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0942417
(2004-09-16)
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발명자
/ 주소 |
- Poese,Matthew L.
- Smith,Robert W. M.
- Wakeland,Ray S.
- Garrett,Steven L.
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출원인 / 주소 |
- The Penn State Research Foundation
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대리인 / 주소 |
Gifford, Krass, Groh, Sprinkle, Anderson &
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인용정보 |
피인용 횟수 :
6 인용 특허 :
44 |
초록
▼
According to one embodiment of the present invention, a thermoacoustic device has a complaint enclosure which includes a rigid portion and a compliant portion. The compliant portion includes an oscillating member and a flexure seal with a pair of ends and a flexure body extending between the ends. O
According to one embodiment of the present invention, a thermoacoustic device has a complaint enclosure which includes a rigid portion and a compliant portion. The compliant portion includes an oscillating member and a flexure seal with a pair of ends and a flexure body extending between the ends. One of the ends is sealed to the rigid portion and the other end is sealed to the oscillating member. The flexure seal has an average cross-sectional area and an end-to-end equilibrium length. A flexure volume is defined as the product of the average cross-sectional area and the end-to-end equilibrium length. A thermal core is disposed in the complaint enclosure and includes at least a first and a second heat exchanger. A working volume of gaseous working fluid fills the complaint enclosure. The working volume of gaseous working fluid has an equilibrium pressure. A motor is operable to oscillate the oscillating member such that the end-to-end length of the flexure seal is increased and decreased with respect to the equilibrium length. Therefore, the pressure of the working volume of gaseous working fluid is oscillated between a peak pressure greater than the equilibrium pressure and a minimum pressure less than the equilibrium pressure. In some embodiments, the working volume is less than or equal to four times the flexure volume, while in other embodiments, the working volume is less than or equal to two times or one times the flexure volume.
대표청구항
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We claim: 1. A thermoacoustic device comprising: a compliant enclosure including a rigid portion and a compliant portion, the compliant portion including an oscillating member and a flexure seal with a pair of ends and a flexure body extending therebetween, one of the ends being sealed to the rigid
We claim: 1. A thermoacoustic device comprising: a compliant enclosure including a rigid portion and a compliant portion, the compliant portion including an oscillating member and a flexure seal with a pair of ends and a flexure body extending therebetween, one of the ends being sealed to the rigid portion and the other end being sealed to the oscillating member, the flexure seal having an average cross sectional area and an end to end equilibrium length, a flexure volume, Vflex, being defined as the product of the average cross sectional area and the end to end equilibrium length; a thermal core disposed in the compliant enclosure, the thermal core including at least a first and a second heat exchanger; a working volume, Vo, of pressurized gaseous working fluid filling the compliant enclosure, the working volume of gaseous working fluid having equilibrium pressure; Pm; and a motor operable to oscillate the oscillating member such that the end to end length of the flexure seal is increased and decreased with respect to the equilibrium length, whereby the pressure of the working volume of gaseous working fluid is oscillated between a peak pressure greater than the equilibrium pressure and a minimum pressure less than the equilibrium pressure; wherein at least a portion of the thermal core is disposed in the flexure volume. 2. The thermoacoustic device according to claim 1, wherein a pressure amplitude, P1 is defined as one half of the difference between the peak pressure and the minimum pressure of the working volume; and description="In-line Formulae" end="lead"P 1/Pm≧5%.description="In-line Formulae" end="tail" 3. The thermoacoustic device according to claim 2, wherein description="In-line Formulae" end="lead"P 1/Pm≧10%.description="In-line Formulae" end="tail" 4. The thermoacoustic device according to claim 2, wherein description="In-line Formulae" end="lead"P 1/Pm≧15%.description="In-line Formulae" end="tail" 5. The thermoacoustic device according to claim 1, wherein the thermal core further comprises a regenerator disposed between the first and second heat exchangers. 6. The thermoacoustic device according to claim 5, further comprising an acoustic phasing means for adjusting the phase of the pressure and velocity of the working fluid in the regenerator such that pressure and velocity are substantially in phase with each other. 7. A thermoacoustic device comprising: a compliant enclosure including a rigid portion and a compliant portion, the compliant portion including an oscillating member and a flexure seal with a pair of ends and a flexure body extending therebetween, one of the ends being sealed to the rigid portion and the other end being sealed to the oscillating member, the flexure seal having an average cross sectional area and an end to end equilibrium length, a flexure volume, Vflex, being defined as the product of the average cross sectional area and the end to end equilibrium length; a thermal core disposed in the compliant enclosure, the thermal core including at least a first and a second heat exchanger; a working volume, Vo, of pressurized gaseous working fluid filling the compliant enclosure, the working volume of gaseous working fluid having equilibrium pressure; Pm; and a motor operable to oscillate the oscillating member such that the end to end length of the flexure seal is increased and decreased with respect to the equilibrium length, whereby the pressure of the working volume of gaseous working fluid is oscillated between a peak pressure greater than the equilibrium pressure and a minimum pressure less than the equilibrium pressure; a pressure amplitude, P1 being defined as one half of the difference between the peak pressure and the minimum pressure of the working volume; wherein description="In-line Formulae" end="lead"P 1/Pm≧5%.description="In-line Formulae" end="tail" 8. The thermoacoustic device according to claim 7, wherein description="In-line Formulae" end="lead"P 1/Pm≧10%.description="In-line Formulae" end="tail" 9. The thermoacoustic device according to claim 7, wherein description="In-line Formulae" end="lead"P 1/Pm≧15%.description="In-line Formulae" end="tail"
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