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:
Sep. 21, 1993
Filed:
Jun. 25, 1992
Manabu Kitamoto, Shizuoka, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An air-conditioning apparatus comprises at least one variable-capability compressor which is contained in a casing together with a lubricating oil, and at least one fixed-capability compressor which is also contained in a casing together with a lubricating oil. The capability of the variable-capability compressor and the number of fixed-capability compressors to be driven, are controlled in accordance with the sum of the air-conditioning loads of a plurality of indoor units. The casings are connected together by means of an oil-balancing pipe. The air-conditioning apparatus further comprises a plurality of oil-balancing devices. These oil-balancing devices are driven on the basis of different control patterns and distribute the lubricating oil between the casings by way of the oil-balancing pipe. The oil-balancing devices are selectively driven in accordance with both the control of the capability of the variable-capability compressor and the control of the number of fixed capability compressors to be driven.