Aisin Seiki Kabushiki Kaisha

Shinji Katsuragawa

Tatsuo Inoue

Shin Kawano

Masahumi Nogawa

A rotary valve unit in a pulse tube refrigerator is quiet, and has high durability and improved refrigeration efficiency by restricting the generation of unidirectional flow. A center hole is formed on a sliding plane side as a recessed space in the sliding surfaces between the sliding plane and another sliding plane. Since the second center hole is in communication with a low pressure input port via a communication passage, the leakage between the sliding surfaces of the sliding planes can be introduced to the low pressure input port with low pressure.

Growing community of inventors

Chiryu, Japan

Shinji Katsuragawa