Title:
ペルチエベースの凍結融解弁およびその使用方法
Document Type and Number:
Japanese Patent JP4369373
Kind Code:
B2
Abstract:
A freeze-thaw valve is provided using a Peltier heat pump where the thermal short-circuit path between a cooled thermal mass and a heated thermal mass is reduced or absent and the valve state transition time is minimized. The freeze-thaw valve comprises a Peltier heat pump mounted to a heat exchange surface that comprises a cross-drilled copper water jacket or manifold. The Peltier heat pump is operated to maintain a cooled thermal mass at a substantially constant low temperature. A resistance heating element is used to produce a heated thermal mass. The freeze-thaw segment of a fluid conduit is commutated to contact either the heated or the cooled thermal mass to thaw and therefore open the valve or cool and thus close the valve. The operation of the Peltier heat pump at a constant temperature avoids problems inherent in the use of a Peltier heat pump to both heat and cool a freeze thaw segment.
Inventors:
Droudville, Theodore A
Application Number:
JP2004558602A
Publication Date:
November 18, 2009
Filing Date:
December 09, 2003
Export Citation:
Assignee:
Waters Technologies Corporation
International Classes:
G01N1/00; B01L3/00; F15C1/08; F16K13/10; F16K99/00; F25B21/02; G01N30/20; G05D23/19; H01L35/32
Domestic Patent References:
| JP8297076A | ||||
| JP2134480A | ||||
| JP3259726A | ||||
| JP58062564A |
Foreign References:
| US20020017484 |
Attorney, Agent or Firm:
Yoshio Kawaguchi
Makoto Ono
Chihiro Watanabe
Kenkyo Kanayama
Katsuma Osaki
Mitsuaki Tsubokura
Makoto Ono
Chihiro Watanabe
Kenkyo Kanayama
Katsuma Osaki
Mitsuaki Tsubokura
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