Yasuhiro Tsujii

Title: Yasuhiro Tsujii: Innovator in Refrigeration Technology

Introduction

Yasuhiro Tsujii is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of refrigeration technology, holding a total of 4 patents. His innovative designs focus on energy efficiency and improved functionality in refrigeration systems.

Latest Patents

One of Tsujii's latest patents is a refrigerator that includes an energy-saving operation unit. This unit performs a control for executing a power-saving operation. It features a time measurement unit that measures the operation time of the energy-saving operation unit. Additionally, an energy-saving operation rate calculation unit calculates the energy-saving operation rate based on the measured operation time. The refrigerator also includes an energy-saving operation rate storage unit that stores the calculated energy-saving operation rate.

Another significant patent involves a refrigerating apparatus and a brushless motor. In this design, when a lock detector detects a locked state of a DC motor during the starting stage, a torque increasing circuit selects a starting sequence pattern of an output torque that is greater by one preselected step. This allows the compressor to restart quickly without repeated starting failures. The compressor, driven by a DC motor, has a shell with an internal pressure approximately equal to the pressure of an inhalation gas. An inverter is included to make the speed of the DC motor variable, and a rotational frequency setting circuit ensures that the motor's frequency does not exceed that of the commercial power source when the internal temperature of the refrigerator is stabilized. This innovative construction significantly reduces power consumption.

Career Highlights

Yasuhiro Tsujii has worked with prominent companies in the refrigeration industry, including Matsushita Refrigeration Company and Panasonic Intellectual Property Management Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in refrigeration technology.

Collaborations

Throughout his career, Tsujii has collaborated with talented individuals such as Keiji Ogawa and Takashi Satomura. These collaborations have contributed to the advancement of his inventions and the overall progress in refrigeration technology.

Conclusion

Yasuhiro Tsujii is a distinguished inventor whose work in refrigeration technology has led to significant advancements in energy efficiency and functionality. His innovative patents reflect his commitment to improving everyday appliances, making them more sustainable and effective.