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:
Feb. 20, 2024
Filed:
Jun. 26, 2020
Daikin Industries, Ltd., Osaka, JP;
Eiji Kumakura, Osaka, JP;
Takuro Yamada, Osaka, JP;
Atsushi Yoshimi, Osaka, JP;
Ikuhiro Iwata, Osaka, JP;
Mitsushi Itano, Osaka, JP;
Daisuke Karube, Osaka, JP;
Yuuki Yotsumoto, Osaka, JP;
Kazuhiro Takahashi, Osaka, JP;
Tatsuya Takakuwa, Osaka, JP;
Yuzo Komatsu, Osaka, JP;
Shun Ohkubo, Osaka, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
A two-stage refrigeration apparatus () includes a first cycle () and a second cycle (). The first cycle () includes a first compressor (), a first condenser (), a first expansion mechanism (), and a first evaporator () that are arranged in such a manner as to be connected to the first cycle. A first refrigerant circulates through the first cycle. The second cycle () includes a second downstream-side condenser () and a second evaporator () that are arranged in such a manner as to be connected to the second cycle. A second refrigerant circulates through the second cycle. The first evaporator () and the second downstream-side condenser () constitute a cascade condenser (). In the cascade condenser (), heat is exchanged between the first refrigerant and the second refrigerant. At least one of the first refrigerant and the second refrigerant is a refrigerant mixture containing at least 1,2-difluoroethylene (HFO-1132(E)).