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:
Dec. 30, 2025
Filed:
Apr. 12, 2022
Hanon Systems, Daejeon, KR;
HANON SYSTEMS, Daejeon, KR;
Abstract
Heat pump system for a vehicle and method for controlling same, which can, during mode changing between air heating and conditioning, prevent noise and vibration due to a pressure difference between refrigerants and reduce delay time. Heat pump system comprises a compressor compressing and discharging refrigerant, an indoor heat exchanger in air conditioning case, causing the refrigerant discharge from the compressor to heat the air, a first expansion valve for selectively expanding the refrigerant passed through the indoor heat exchanger, an evaporator in air conditioning case, enabling refrigerant to exchange heat with air evaporating refrigerant, and a controller for controlling the opening degree of the first expansion valve during mode changing between air heating and conditioning, wherein the controller turns off the compressor and gradually opens the first expansion valve to increase the opening degree when the mode is changed from the heat pump mode to the air conditioning mode.