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:
Nov. 23, 1999
Filed:
Jun. 01, 1998
Yoshihiro Sumida, Shizuoka, JP;
Masahiro Nakayama, Shizuoka, JP;
Sou Suzuki, Shizuoka, JP;
Isao Funayama, Shizuoka, JP;
Kunihiro Morishita, Shizuoka, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a refrigeration cycle using a cooling medium circuit in which a compressor, a heat-source-side heat exchanger, a decompressor, and a user-side heat exchanger are connected successively for circulating a cooling medium, and refrigerating machine oil having no or extremely low mutual solubility to the cooling medium; an internal diameter of a down comer in which a liquid phase cooling medium flows from the upstream side to the down stream side in the refrigeration cycle is adjusted so that the flow velocity of cooling medium in the down comer is made to be higher than that at which refrigerating machine oil floating in a cooling medium goes down.