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:
Jun. 18, 2002
Filed:
Mar. 28, 2001
Noriyasu Kawakatu, Osaka, JP;
Akitoshi Ueno, Osaka, JP;
Toshiaki Mukaidani, Osaka, JP;
Takeo Ueno, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
The refrigerating system includes a low stage side refrigerant circuit ( ) formed by connecting a low stage side compressor ( ), a cascade condenser ( ), a low stage side receiver ( ), a low stage side expansion valve ( ) formed of a temperature-sensitive expansion valve and an evaporator ( ) in this order. The system also includes a high stage side refrigerant circuit ( ) formed by connecting a high stage side compressor ( ), a condenser ( ), a high stage side receiver ( ), a high stage side expansion valve ( ) formed of a motor-operated expansion valve and the cascade condenser ( ) in this order. The opening of the high stage side expansion valve ( ) is adjusted so that the pressure sensed by a high-pressure sensor (SPH ) for sensing the high pressure in the low stage side refrigerant circuit ( ) reaches a predetermined target high pressure.