Company Filing History:
Years Active: 2013-2014
Title: Suguru Nakagawa: Innovator in Propeller Fan Technology
Introduction
Suguru Nakagawa is a prominent inventor based in Sakai, Japan. He has made significant contributions to the field of propeller fan technology, holding 2 patents that showcase his innovative designs and engineering prowess.
Latest Patents
One of Nakagawa's latest patents involves a propeller fan that features a hub and multiple blades arranged radially on the hub's outer circumference. This design includes bent surface-shaped recesses on the positive pressure surface at the trailing edge of each blade. These recesses extend in the rotation direction of the fan and are arranged radially, with protrusions formed between adjacent pairs of recesses. This configuration reduces airflow caused by centrifugal force, allowing the airflow on the positive pressure surface of the blade to flow smoothly along the recesses. Consequently, this design minimizes the differences in velocity and volume of airflow between the outer tip of the blade and the hub, enhancing the overall functionality of the blade. As a result, the air blowing performance, including efficiency and noise levels, is significantly improved.
Another patent by Nakagawa addresses the issue of leakage flow produced between the bellmouth and each blade tip of a propeller fan. This leakage flow can lead to increased blowing noise and higher input for the fan motor. To mitigate the blade tip vortex caused by this leakage flow, Nakagawa's invention incorporates recessed and projected portions alternately formed on the blade surface corresponding to the blade tip. This innovative approach effectively suppresses the adverse effects of the leakage flow.
Career Highlights
Suguru Nakagawa is currently employed at Daikin Industries, Ltd., where he continues to develop cutting-edge technologies in the field of air movement and ventilation. His work has been instrumental in advancing the efficiency and performance of propeller fans.
Collaborations
Throughout his career, Nakagawa has collaborated with notable colleagues, including Jirou Yamamoto and Zhiming Zheng. These partnerships have fostered a creative environment that encourages innovation and the sharing of ideas.
Conclusion
Suguru Nakagawa's contributions to propeller fan technology exemplify his commitment to innovation and engineering excellence. His patents reflect a deep understanding of airflow dynamics and a dedication to improving performance in practical applications.