This inventor holds 1 USPTO granted patent and 1 published patent application. Top assignee: Qingdao Hisense Hitachi Air-Conditioning Systems Co., Ltd.. Active years: 2026.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2026
Title: Guilan Liu: Air-Conditioning Invention and Patent
Introduction
Guilan Liu is an inventor associated with Qingdao, China, and Qingdao Hisense Hitachi Air-Conditioning Systems Co., Ltd. His patent work concerns air-conditioning systems and refrigerant control.
Latest Patents
Liu is associated with 1 patent, titled “Air Conditioner and Control Method Thereof.” The invention describes an air conditioner with outdoor and indoor units, a refrigerant circulation loop, and a controller. During stable cooling operation, the controller compares supercooling degrees under current and standard conditions, accounts for differences in outdoor-unit internal volume, and uses the resulting refrigerant-amount difference to determine the system’s refrigerant amount.
Career Highlights
Liu’s patent reflects work on control methods for air-conditioning equipment, particularly the estimation and management of refrigerant quantity under varying operating conditions. His listed company is Qingdao Hisense Hitachi Air-Conditioning Systems Co., Ltd.
Collaborations
Liu’s listed coworkers include Lei Shi and Xingxiang Xia. The available information identifies them as coworkers but does not specify their roles in the patent.
Conclusion
Guilan Liu’s patent focuses on determining refrigerant quantity through operating-condition measurements and calculations, contributing to the development of air-conditioning control technology.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile