The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 2006
Filed:
May. 04, 2004
Hideo Kubo, Kawasaki, JP;
Hisashi Kawashima, Kawasaki, JP;
Jie Wei, Kawasaki, JP;
Junichi Ishimine, Kawasaki, JP;
Masahiro Suzuki, Kawasaki, JP;
Yoshiaki Udagawa, Kawasaki, JP;
Masahiro Mochizuki, Kawasaki, JP;
Hideo Kubo, Kawasaki, JP;
Hisashi Kawashima, Kawasaki, JP;
Jie Wei, Kawasaki, JP;
Junichi Ishimine, Kawasaki, JP;
Masahiro Suzuki, Kawasaki, JP;
Yoshiaki Udagawa, Kawasaki, JP;
Masahiro Mochizuki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A refrigeration system allows the refrigerant to circulate through a closed circulation channel. A dry evaporator is incorporated in the circulation channel. The dry evaporator is designed to keep a quality smaller than 1.0 in evaporating the refrigerant. The quantity of heat transfer per unit area, namely, a heat transfer coefficient depends on the quality. The heat transfer coefficient remarkably drops when the quality of the refrigerant exceeds a predetermined threshold level before the quality actually reaches 1.0. The quality of the refrigerant kept below the predetermined threshold level during vaporization of the refrigetant in the dry evaporator allows a reliable establishment of a higher performance of cooling. On the other hand, if a refrigerant completely evaporates in a dry evaporator in a conventional manner, the heat transfer coefficient of the refrigerant remarkably drops after the quality of the refrigerant exceeds the predetermined threshold level. Accordingly, the conventional dry evaporator is forced to absorb heat at a lower heat transfer coefficient, as compared with the present dry evaporator.