Masaki Sumi

Title: **Masaki Sumi: Innovator in Compressor Technology**

Introduction

Masaki Sumi is a prominent inventor based in Kyoto, Japan, known for his significant contributions to refrigeration technology. With a total of three patents, he has focused primarily on innovations that enhance the efficiency and functionality of compressors used in refrigeration systems.

Latest Patents

Among Masaki Sumi's latest patents are the “Compressor Driving Device,” the “Compressor Including the Same,” and the “Refrigeration Cycle Apparatus Including the Compressor Driving Device and the Compressor.” His innovative compressor driving device features a controller that employs Pulse Width Modulation (PWM) to drive the compressor. It includes an inverter circuit unit that supplies power to the electric motor within the compressor. The device is equipped with a voltage detector that monitors the voltage output to the electric motor and a current detector that checks the current output. Notably, if the product of the detection values from these detectors exceeds a specific threshold, the control signal’s duty ratio is reduced to maintain the input power at a predefined level.

Additionally, Sumi's patent for a “Simple Inverter-Controlled Refrigerator” lays out a system utilizing a temperature detector and a constant speed main body control unit that collaboratively manage a variable speed compressor, thereby optimizing energy usage and enhancing cooling efficiency.

Career Highlights

Masaki Sumi has worked with renowned entities such as Panasonic Intellectual Property Management Co., Ltd. and Panasonic Appliances Refrigeration Devices Singapore. His expertise in compressor technology has made a considerable impact on the development of energy-efficient refrigeration systems.

Collaborations

Throughout his career, Masaki Sumi has collaborated with notable professionals, including Shigetomi Tokunaga and Hiroaki Kase, to innovate and refine technologies that contribute to modern refrigeration practices.

Conclusion

Masaki Sumi’s inventive spirit and commitment to improving compressor technology position him as a leading figure in the field of refrigeration. His contributions continue to pave the way for advancements in energy efficiency and performance in this essential industry.