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Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 7, 2017
Patent Application Number
14508449
Date Filed
October 7, 2014
Patent Citations Received
Patent Primary Examiner
Patent abstract
A heat pump system for a vehicle delays the change of the direction of a directional valve for a given period of time and then conducts the change of the direction of the directional valve, upon receiving the mode change signal between an air conditioner mode and a heat pump mode, thus preventing the generation of the noise and vibration caused by the differential pressure of a refrigerant.
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