公开(公告)号：US06405554B1

公开(公告)日：2002-06-18

申请号：US09787900

申请日：2001-03-28

申请人： Noriyasu Kawakatu ,  Akitoshi Ueno ,  Toshiaki Mukaidani ,  Takeo Ueno

发明人： Noriyasu Kawakatu ,  Akitoshi Ueno ,  Toshiaki Mukaidani ,  Takeo Ueno

IPC分类号： F25B700

CPC分类号： F25B7/00 ,  F25B13/00 ,  F25B49/027 ,  F25B2341/065 ,  F25B2600/021 ,  F25B2600/21 ,  Y02B30/72 ,  Y02B30/741

摘要： The refrigerating system includes a low stage side refrigerant circuit (2) formed by connecting a low stage side compressor (4), a cascade condenser (5), a low stage side receiver (6), a low stage side expansion valve (7) formed of a temperature-sensitive expansion valve and an evaporator (8) in this order. The system also includes a high stage side refrigerant circuit (3) formed by connecting a high stage side compressor (9), a condenser (10), a high stage side receiver (11), a high stage side expansion valve (12) formed of a motor-operated expansion valve and the cascade condenser (5) in this order. The opening of the high stage side expansion valve (12) is adjusted so that the pressure sensed by a high-pressure sensor (SPH2) for sensing the high pressure in the low stage side refrigerant circuit (2) reaches a predetermined target high pressure.

摘要翻译： 制冷系统包括通过连接低压侧侧压缩机（4），级联冷凝器（5），低压侧侧接收器（6），低压侧侧膨胀阀（7） 由温度敏感的膨胀阀和蒸发器（8）依次形成。 该系统还包括通过连接高级侧压缩机9，冷凝器10，高级侧接收器11和高压侧侧膨胀阀12而形成的高级侧制冷剂回路3。 的电动膨胀阀和级联冷凝器（5）。 调节高级侧膨胀阀（12）的开度，使得用于感测低段侧制冷剂回路（2）中的高压的高压传感器（SPH2）感测到的压力达到规定的目标高压。