Sanhe Tongfei Refrigeration Co., Ltd. engages in the research and development, production and sale of industrial refrigeration equipment. Its products include liquid constant temperature equipment, electric box constant temperature device, pure water cooling unit, and special heat exchanger. It provides numerical control equipment and power electronic device refrigeration in the application field. The company was founded by Guo Shan Zhang on January 11, 2001 and is headquartered in Langfang, China.