Keiji Ogawa

Title: Keiji Ogawa: Innovator in Refrigeration Technology

Introduction

Keiji Ogawa is a prominent inventor based in Yamatokoriyama, Japan. He has made significant contributions to the field of refrigeration technology, holding a total of 4 patents. His innovative designs focus on improving the efficiency and compactness of refrigeration systems.

Latest Patents

Ogawa's latest patents include a power controller and compressor for refrigeration systems. This invention addresses the issue of large power controllers in refrigerating systems by providing a compact and cost-effective solution. The design features a highly heat-dissipating first board with an inverter circuit and a second board with a control circuit, both placed in parallel and housed within a case. The case is designed with slits for heat sinks and connectors, allowing for optimal heat dissipation and integration with the compressor. This innovation significantly reduces the space occupied by the controller in the refrigeration system.

Another notable patent involves a refrigerating apparatus and a brushless motor control system. This invention includes a lock detector that identifies a locked state of a DC motor during startup. A torque-increasing circuit selects a starting sequence pattern that increases output torque, enabling the compressor to restart quickly without repeated failures. The design also incorporates an inverter to vary the speed of the DC motor, which helps in reducing power consumption when the internal temperature of the refrigerator stabilizes.

Career Highlights

Keiji Ogawa is associated with Matsushita Refrigeration Company, where he has been instrumental in developing advanced refrigeration technologies. His work has led to significant improvements in the efficiency and functionality of refrigeration systems.

Collaborations

Ogawa has collaborated with notable coworkers, including Kouji Hamaoka and Takashi Satomura. Their combined efforts have contributed to the success of various projects within the company.

Conclusion

Keiji Ogawa's innovative contributions to refrigeration technology have made a lasting impact on the industry. His patents reflect a commitment to enhancing efficiency and reducing the size of refrigeration systems. His work continues to influence advancements in this vital field.