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US 7,094,040 B2Granted
Fluid transferring system and micropump suitable therefor
AssigneeMinolta Co., Ltd.
InventorsKusunoki Higashino, Yasuhisa Fujii, Shunichi Hayamizu, Yasuhiro Sando
Life of this patent
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Abstract
Disclosed herein is a micro fluid transferring system that comprises a micropump having a chamber, a first fluid transferring portion connected to the chamber, and a second fluid transferring portion connected to the chamber. This system is characterized in that at least one of the first and second fluid transferring portions comprises a pressure absorbing section for absorbing or alleviating a liquid vibrational pressure therein.
Claims18
A fluid transferring system comprising:
- a micropump having a chamber;
- a first fluid transferring portion connected to the chamber;
- and
- a second fluid transferring portion connected to the chamber,
- wherein at least one of the first and second fluid transferring portions comprises a pressure absorbing section for absorbing or alleviating a liquid vibrational pressure therein and wherein the pressure absorbing section is provided across a length ½ or more times a wavelength of a pressure compressional wave corresponding to a driving cycle of the micropump in a fluid transferring direction of the at least one of first and second fluid transferring portions.
2 more elements
A fluid transferring system comprising:
- a micropump having a chamber;
- a first fluid transferring portion connected to the chamber;
- and
- a second fluid transferring portion connected to the chamber,
- wherein at least one of the first and second fluid transferring portions comprises a pressure reflecting section configured to reflect a part of a pressure compressional wave propagating in a direction away from the chamber in the at least one of the first and second fluid transferring portions back toward the chamber side of the at least one of the first and second fluid transferring portions.
2 more elements
A fluid transferring system comprising:
- a micropump having a chamber to which a first opening section and a second opening section are formed, wherein, when a pressure in the chamber is raised or lowered, a change rate in flow channel resistance at the first opening section is smaller than a change rate in flow channel resistance at the second opening section;
- a first fluid transferring portion connected to the chamber though the first opening section;
- and
- a second fluid transferring portion connected to the chamber through the second opening section,
- wherein the first fluid transferring portion has a reflecting section configured to reflect a part of a pressure compressional wave propagating in a direction away from the chamber in the first fluid transferring portion back toward the chamber side of the first fluid transferring portion.
2 more elements
A fluid transferring system comprising:
- a micropump comprising a chamber to which a first opening section and a second opening section are formed, the chamber having a first capacity, wherein, when a pressure in the chamber is raised or lowered, a change rate in flow channel resistance at the first opening section is smaller than a change rate in flow channel resistance at the second opening section;
- a fluid reservoir connected to the chamber though the first opening section, the fluid reservoir having a second capacity larger than the first capacity;
- a fluid transferring portion connected to the chamber through the second opening section;
- and
- wherein the fluid transferring portion comprises a pressure absorbing section for absorbing or alleviating a liquid vibrational pressure therein and wherein the pressure absorbing section is provided across a length ½ or more times a wavelength of a pressure compressional wave corresponding to a driving cycle of the micropump in a fluid transferring direction of the at least one of first and second fluid transferring portions.
2 more elements
Dependencies are inferred from the claim text.