公开(公告)号：US06434947B1

公开(公告)日：2002-08-20

申请号：US09822354

申请日：2001-04-02

申请人： Shaowei Zhu ,  Masahumi Nogawa ,  Shin Kawano ,  Tatsuo Inoue

发明人： Shaowei Zhu ,  Masahumi Nogawa ,  Shin Kawano ,  Tatsuo Inoue

IPC分类号： F25B900

摘要： In a pulse tube refrigerator the refrigeration efficiency has been improved by reducing the on-off valve loss. A second space 47 in a cylinder member 41 is connected with a second high pressure on-off valve 23 and a second low pressure on-off valve 24. A buffer side on-off valve 25 is provided between the buffer space (a buffer tank 50) and the second space 47. By opening the buffer side on-off valve 25 before the second high pressure on-off valve 23 or the second low pressure on-off valve 24 is open, the pressure in the second space 47 can be the intermediate pressure. Since the pressure difference when the valves are open is decreased, the on-off valve loss can be decreased.

公开(公告)号：US06460349B1

公开(公告)日：2002-10-08

申请号：US09996768

申请日：2001-11-30

申请人： Shin Kawano ,  Masahumi Nogawa ,  Shinji Katsuragawa ,  Tatsuo Inoue

发明人： Shin Kawano ,  Masahumi Nogawa ,  Shinji Katsuragawa ,  Tatsuo Inoue

IPC分类号： F25B900

CPC分类号： F16K11/074 ,  F16K31/041 ,  F25B9/145 ,  F25B41/046 ,  F25B2309/006 ,  F25B2309/1408 ,  F25B2309/1418 ,  F25B2309/14181 ,  F25B2309/14241 ,  F25B2309/1427

摘要： 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.

摘要翻译： 脉冲管式冰箱中的旋转阀单元是安静的，并且通过限制单向流的产生具有高的耐久性和改进的制冷效率。 在滑动平面侧的滑动面与另一滑动平面之间的滑动面中形成有作为凹部空间的中心孔。 由于第二中心孔经由连通路与低压输入口连通，所以滑动面的滑动面之间的泄漏可以以低压被引入到低压输入口。