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:
Apr. 16, 1996
Filed:
Nov. 07, 1994
Yasutaka Negishi, Konan, JP;
Zexel Corporation, Tokyo, JP;
Abstract
An automobile air-conditioning system has a compressor driven by an electric motor, a main condenser for cooling which is provided outside a car-room, a subcondenser for heating which is provided in the car-room, an evaporator provided in the car-room and a changeover valve for switching refrigerant paths, and executes a heating operation and a cooling operation by switching refrigerant paths by the changeover valve. When an air-conditioning mode is a heating mode and a room temperature of the automobile is below a prescribed temperature, a revolution of the compressor is compensated by a first prescribed revolution pitch according to a discharge temperature of a refrigerant delivered from the compressor. When the air-conditioning mode is the heating mode and the room temperature of the automobile is above the prescribed temperature, the revolution of the compressor is compensated by a second prescribed revolution pitch which is larger than the first prescribed revolution pitch according to the discharge temperature of the refrigerant delivered from the compressor.