Osaka, Japan

Hiroto Nakajima

This inventor holds 5 USPTO granted patents and 3 published patent applications. Top assignee: Daikin Industries, Ltd.. Active years: 1996-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroto Nakajima. Retrieved from https://idiyas.com/inventor/hiroto-nakajima-nux6kdbm

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank
USPTO Granted Patents = 5 

% Patents Active = 60.0

Average Co-Inventor Count = 2.6

ph-index = 3

Forward Citations = 32(Granted Patents)


Location History:

  • Sakai, JP (1996 - 1998)
  • Osaka, JP (1997 - 2012)

Company Filing History:


Years Active: 1996-2012

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5 patents (USPTO):Explore Patents

Title: Hiroto Nakajima: Innovator in Refrigeration Technology

Introduction

Hiroto Nakajima is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of refrigeration technology, holding a total of 5 patents. His work focuses on improving the efficiency and functionality of refrigeration systems.

Latest Patents

Among his latest patents, Nakajima has developed a refrigeration apparatus designed to enhance the supply of refrigeration oil in an oil return compressor. This innovative design connects an oil sump in a discharge pressure space to the downstream side of an oil separator through an oil return passageway. Additionally, he has introduced a pressure reducing means to optimize the refrigerant flow towards the oil separator.

Another notable invention is his freezing device, which integrates a refrigerant circuit, a refrigerator circuit, and a freezing circuit in parallel to an outdoor circuit. This system features a booster compressor and a four-way switch valve, allowing for efficient cooling and defrosting operations. During cooling, refrigerant evaporated in the freezer heat exchanger is compressed and then directed to a variable capacitance compressor, ensuring optimal performance.

Career Highlights

Hiroto Nakajima is currently employed at Daikin Industries, Ltd., a leading company in the HVAC industry. His work at Daikin has allowed him to push the boundaries of refrigeration technology and contribute to the company's innovative product offerings.

Collaborations

Throughout his career, Nakajima has collaborated with talented coworkers, including Takeo Ueno and Tetsuya Suda. These partnerships have fostered a creative environment that encourages the development of groundbreaking technologies.

Conclusion

Hiroto Nakajima's contributions to refrigeration technology exemplify his dedication to innovation and efficiency. His patents reflect a deep understanding of the complexities involved in refrigeration systems, making him a valuable asset to Daikin Industries and the industry as a whole.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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