公开(公告)号：US08366406B2

公开(公告)日：2013-02-05

申请号：US12516667

申请日：2008-07-24

申请人： Hajime Sato ,  Yoshiyuki Kimata

发明人： Hajime Sato ,  Yoshiyuki Kimata

IPC分类号： F04B25/00 ,  F25D17/04 ,  F25D1/10

CPC分类号： F04C23/008 ,  F04C18/0215 ,  F04C18/356 ,  F04C23/005 ,  F04C29/042 ,  F04C29/045 ,  F25B1/10 ,  F25B31/008 ,  F25B2500/28 ,  F25B2600/2507 ,  F25B2600/2509

摘要： A multi-stage compressor is provided that reliably prevents liquid compression in a higher stage compression mechanism and also prevents compression efficiency degradation resulting from overheating of injection refrigerant and from the lubricating oil being raised up together with the injection refrigerant. An injection circuit is branched into a plurality of circuits. A first circuit thereof is communicatively connected to an inside space of a closed housing that is at the same side as the higher stage compression mechanism with respect to an electric motor, and a second circuit is communicatively connected to an inside space of the closed housing that is opposite from the higher stage compression mechanism with respect to the electric motor. The first circuit and the second circuit are provided with a switching mechanism for switching the injection circuit to the first circuit or the second circuit according to the dryness of the injection refrigerant.

摘要翻译： 提供了一种多级压缩机，其可靠地防止在较高级压缩机构中的液体压缩，并且还防止由于注射制冷剂的过热而导致的压缩效率降低，并且与润滑油一起与注射制冷剂一起升高。 注入电路分支成多个电路。 其第一电路与相对于电动机处于与上级压缩机构相同侧的封闭壳体的内部空间连通地连接，第二电路与封闭壳体的内部空间连通地连接， 与较高级压缩机构相对于电动机相反。 第一电路和第二电路设置有用于根据注射制冷剂的干燥度将注入电路切换到第一电路或第二电路的开关机构。