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. 28, 2003
Filed:
Mar. 28, 2002
Denso Corporation, Kariya, JP;
Abstract
An air-conditioner for use in an automotive vehicle, an engine of which is stopped every time the vehicle stops at an intersection, includes a usual refrigeration cycle having a main compressor driven by the engine and a sub-circuit having a sub-compressor driven by an electric motor. The sub-compressor is connected in parallel to the main compressor, and both compressors are alternately driven. Refrigerant mixed with lubricant circulating in the main refrigeration cycle is prevented from entering into the sub-circuit while the sub-compressor is not in operation by means of a piping structure of the sub-circuit. When the refrigerant enters into the sub-circuit, it is efficiently returned to the main refrigeration cycle by intermittently operating the sub-compressor while the main compressor is operating.