Hisatsugu Matsunaga

Title: Hisatsugu Matsunaga: Innovator in Ejector Cycle Technology

Introduction

Hisatsugu Matsunaga is a notable inventor based in Anjo, Japan, recognized for his innovative contributions to refrigerant technology. With a total of six patents to his name, Matsunaga has made significant strides in improving the efficiency and functionality of ejector cycles in refrigeration systems.

Latest Patents

Matsunaga's latest patents focus on enhancing the performance of ejector cycles. One of his key inventions involves a control unit that regulates the airflow of an evaporator fan. This system ensures that the refrigerant flowing in the evaporator remains within a predetermined speed range, which notably prevents excessive lubrication oil from being trapped in the evaporator. The control unit utilizes various parameters, including the condenser's atmosphere temperature and refrigerant flow rate discharged from the compressor, to establish this optimal flow speed range.

Another innovative patent by Matsunaga describes an ejector cycle equipped with a nozzle designed for decompressing refrigerant. This system includes a receiver for storing refrigerant positioned at the condenser's outlet side, along with a bypass passage and switching valve that facilitate the introduction of high-temperature refrigerant into the evaporator during defrosting operations. When the defrosting cycle is active, the switching valve opens while the condenser's cooling fan operates, allowing a portion of the refrigerant to flow into the evaporator, effectively removing frost build-up.

Career Highlights

Matsunaga has spent his professional career at Denso Corporation, a leading global automotive components manufacturer. His role as an inventor has allowed him to contribute extensively to the field of refrigeration technologies. Through his innovations, Matsunaga has played a crucial part in advancing engineering solutions that enhance energy efficiency and operational reliability in refrigerant systems.

Collaborations

Throughout his career, Matsunaga has collaborated with esteemed colleagues, such as Haruyuki Nishijima and Hirotsugu Takeuchi. These partnerships have fostered an environment of creativity and collaboration, allowing for the successful development of unique patentable ideas and technologies.

Conclusion

Hisatsugu Matsunaga stands as a prominent figure in the innovation landscape within the refrigeration industry. With his six patents and commitment to advancing ejector cycle technology, Matsunaga's work continues to impact energy efficiency and performance in refrigeration systems. His contributions not only benefit Denso Corporation but also pave the way for future innovations in the field.