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:
May. 29, 2001
Filed:
Aug. 23, 2000
Daikin Industries, Ltd., , JP;
Abstract
A first refrigeration circuit (,) for a refrigerating apparatus (,) which is formed into a two-stage cascade refrigerating cycle by establishing connection between a high temperature-side refrigerant circuit (,) and a low temperature-side refrigerant circuit (,) through a first refrigerant heat exchanger (,A), a second refrigeration circuit (,) which is formed into a refrigerating cycle different from that of the first refrigeration circuit (,), and a second refrigerant heat exchanger (,B) connected to the low temperature-side refrigerant circuit (,) are provided. The second refrigerant heat exchanger (,B) is connected, through connection piping lines (,), to a liquid piping line (,) and a suction-side gas piping line (,) of the second refrigeration circuit (,). First switching means (,) are disposed for selective circulation of a refrigerant of the second refrigeration circuit (,) to the second refrigerant heat exchanger (,B) through the connection piping lines (,), whereby, even when a heat source equipment (,) stops operating in a two-stage cascade refrigerating-cycle refrigeration system applied to a showcase or the like, it becomes possible to achieve continuation of refrigeration operation.