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:
Oct. 03, 1989
Filed:
Feb. 02, 1989
Manabu Kitamoto, Fuji, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An outdoor unit has at least two variable-capability compressors and has an outdoor heat exchanger coupled to the compressors having lubricating oil supplying sections coupled together by an oil-balancing member. A plurality of indoor units are each coupled to the outdoor unit for forming a refrigerating cycle and each have at least an indoor heat exchanger and an output section for outputting demand capability data according to an air conditioning load of the indoor heat exchanger. In accordance with the demand capability data, a controller generates a parallel operation command for parallel operation involving both of the compressors of the outdoor unit with capability according to a sum of the demand capability data from the indoor units. The parallel operation command is executed by repeating a normal operation command for performing a normal operation over a given time and first and second oil-balancing operation commands for every given cycle, the first and second oil-balancing operation commands for effecting first and second oil-balancing operations having a mutually complimentary relation in preceding and succeeding stages of the normal operation.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile