Location History:
- Isesaki, JP (1995 - 2000)
- Gunma, JP (2003)
Company Filing History:
2 out of 8,780 
1 out of 832,812 Years Active: 1995-2003
Title: Kiyoshi Koyama: Innovator in Heat Pump Technology
Introduction
Kiyoshi Koyama is a notable inventor based in Isesaki, Japan. He has made significant contributions to the field of heat pump technology, holding a total of three patents. His innovative designs focus on improving energy efficiency and reducing noise levels in heating systems.
Latest Patents
One of Koyama's latest patents is a heat pump type hot water supply apparatus. This apparatus utilizes refrigerant heat to heat water and store it for later use. It includes a heat pump unit with a refrigerant circuit that employs natural refrigerants. The system features a compressor for compressing refrigerant, a heat-pump heat exchanger, and a refrigerant-water heat exchanger to facilitate heat exchange between refrigerant and water. Additionally, the hot water supply unit comprises a hot water supply tank for storing the heated water and a water pipe that connects the refrigerant-water heat exchanger to the hot water supply tank, allowing for efficient circulation.
Another significant patent is for a cross-flow fan and an air-conditioner utilizing it. This invention incorporates a series of vanes arranged around supporting disks along a rotary shaft. The design aims to reduce noise levels, particularly in the low-frequency range, by optimizing the angular intervals of the vanes based on a logistic representation.
Career Highlights
Kiyoshi Koyama has worked with Sanyo Electric Co., Ltd., where he honed his skills in developing innovative heating solutions. His experience in the industry has allowed him to contribute to advancements in energy-efficient technologies.
Collaborations
Koyama has collaborated with notable colleagues such as Shigeya Ishigaki and Kensuke Matsumoto. Their combined expertise has fostered a creative environment that encourages innovation in their respective fields.
Conclusion
Kiyoshi Koyama's contributions to heat pump technology and his innovative patents demonstrate his commitment to improving energy efficiency and reducing noise in heating systems. His work continues to influence the industry and inspire future innovations.