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. 02, 2025
Filed:
Jul. 04, 2023
Garrett Transportation I Inc., Torrance, CA (US);
Ankur Nayak, Bangalore, IN;
Garrett Transportation I Inc., Torrance, CA (US);
Abstract
An air conditioning system for an electric vehicle includes a refrigerant E-compressor made up of a centrifugal compressor and an electric motor for driving the compressor. The housing of the compressor defines a coolant passage for liquid coolant. A coolant unit pumps liquid coolant through the coolant passage during normal AC system operation to cool the motor. A method for preventing or mitigating harmful effects of liquid refrigerant being ingested by the compressor includes determining whether liquid refrigerant is likely present in the compressor inlet; if so, a heating unit raises the temperature of the liquid coolant to thereby heat and evaporate any liquid refrigerant before starting the compressor. Once the danger of liquid refrigerant is passed, the compressor is started and the heating unit is deactivated.