This inventor holds 2 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 2001-2002.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2001-2002
Title: Hideo Kumakura: Innovator in Refrigeration Technology
Introduction
Hideo Kumakura is a notable inventor based in Ashikaga, Japan. He has made significant contributions to the field of refrigeration technology, holding 2 patents that showcase his innovative approach to improving efficiency in refrigeration systems.
Latest Patents
Kumakura's latest patents include advancements in refrigerator technology. One patent describes a refrigerator equipped with a motor for driving a compressor, an inverter for controlling the motor's operation, and a converter that responds to AC to perform a boosting function. This converter supplies DC of variable voltage to the inverter, with control means to manage the output of multiple DC voltages. Notably, the lowest voltage among these is designed to turn off the boosting function of the converter.
Another patent addresses the challenges faced when implementing inverter control in refrigerators. It highlights the issue of compressor motor efficiency dropping due to switching loss in the power element when the DC voltage is boosted. Kumakura's solution involves controlling the converter circuit to turn off when specific conditions regarding temperature and compressor motor speed are met, thereby enhancing overall efficiency.
Career Highlights
Hideo Kumakura is currently employed at Hitachi, Ltd., where he continues to develop innovative solutions in refrigeration technology. His work has been instrumental in addressing common issues faced in the industry, particularly regarding energy efficiency and operational effectiveness.
Collaborations
Kumakura has collaborated with notable colleagues, including Junichi Takagi and Makoto Ishii. Their combined expertise has contributed to the successful development of advanced refrigeration technologies.
Conclusion
Hideo Kumakura's contributions to refrigeration technology reflect his commitment to innovation and efficiency. His patents not only address existing challenges but also pave the way for future advancements in the field.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile