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:
Jul. 30, 1985
Filed:
Apr. 24, 1984
Nippondenso Co. Ltd., Kariya, JP;
Abstract
A refrigeration system for use in an automotive air conditioning system has a variable displacement refrigerant compressor drivingly connectable by an electromagnetic clutch to an automotive engine, a refrigerant evaporator through which air is caused to flow by a blower, and a throttling valve which prevents the refrigerant pressure in the evaporator from lowering over the predetermined pressure, so that frost or icing is not formed on the evaporator fins. The compressor is provided with one or two unloading ports for releasing the refrigerant being compressed and with a valve member or members associated with the unloading port. The operation of the throttling valve is detected by a sensor which emits a signal to an electric circuit for actuating the valve member or members so that the unloading port is selectively or gradually opened to vary the compressor displacement to provide a multi-stage or continuous compressor.