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. 08, 1999
Filed:
Dec. 03, 1997
Yoshitoshi Noda, Tochigi, JP;
Calsonic Corporation, Tokyo, JP;
Abstract
An air conditioning system for a motor vehicle powered by an internal combustion engine has a first system for carrying out a first cycle, which includes a compressor driven by the engine, a main condenser, a first sub-condenser and an evaporator which are connected through pipes to form a first refrigerant circulation circuit through which a refrigerant flows from an outlet of the compressor to an inlet of the same while changing its phase, the first cycle causing the first sub-condenser as a heater and the evaporator as a cooler when operated. The air conditioning system has further a second system for carrying out a second cycle, which includes the compressor and a second sub-condenser which are connected through pipes to form a second refrigerant circulation circuit through which the refrigerant flows from the outlet of the compressor to the inlet of the same while changing its phase, the second cycle causing the second sub-condenser as a heater when operated. First and second independent air flow passages are defined. The first passage has the heater core, the first sub-condenser and the evaporator installed therein, and the second passage has the second sub-condenser installed therein. A sub-evaporator is arranged in the pipe extending from an outlet of the second sub-condenser to an inlet of the compressor. A cooling water circuit is arranged through which engine cooling water of the engine is fed to the sub-evaporator to carry out heat exchange between the engine cooling water and the refrigerant flowing in the pipe. A control device is arranged to control, when the second system is under operation, the flow of engine cooling water directed to the sub-evaporator in accordance with a load of the engine.