Ultra-low temperature freezer, refrigeration system and vacuum apparatus
    1.
    发明申请
    Ultra-low temperature freezer, refrigeration system and vacuum apparatus 审中-公开
    超低温冷冻机,制冷系统和真空设备

    公开(公告)号:US20090188270A1

    公开(公告)日:2009-07-30

    申请号:US10585463

    申请日:2005-01-05

    摘要: In an ultra-low temperature freezer (R) using refrigerant mixture in which plural kinds of refrigerants having different boiling points are mixed, in order to ensure the flow rate of liquid refrigerant into a supercooler (31) and enhance the cooling efficiency of a cryocoil (32), the ultra-low temperature freezer (R) comprises: a main refrigerant circuit (38) provided with the cryocoil (32) and a capillary tube (29); and a sub refrigerant circuit (39) that is connected at the upstream end to the upstream end of the main refrigerant circuit (38) to branch off therefrom and provided with a capillary tube (28), and the ultra-low temperature freezer (R) is configured so that the sub refrigerant circuit (39) is lower in height than the main refrigerant circuit (38). Thus, gas-liquid mixture refrigerant discharged from the primary side (31a) of the supercooler (31) flows into the sub refrigerant circuit (39) at a higher rate than into the main refrigerant circuit (38) and, in turn, liquid refrigerant flows more into the sub refrigerant circuit (39) than into the main refrigerant circuit (38).

    摘要翻译: 在使用其中混合有多种沸点不同的制冷剂的制冷剂混合物的超低温冷冻机(R)中,为了确保液体制冷剂进入过冷却器(31)的流量并提高低温冷却器的冷却效率 (32),所述超低温冷冻机(R)包括:设置有所述低温冷冻机(32)的主制冷剂回路(38)和毛细管(29); 以及副制冷剂回路(39),其在上游侧连接到主制冷剂回路(38)的上游侧,从其分支并设置有毛细管(28),超低温冷冻机 )构成为副制冷剂回路(39)的高度低于主制冷剂回路(38)。 因此,从过冷却器31的一次侧(31a)排出的气液混合制冷剂以比主制冷剂回路(38)更高的速度流入副制冷剂回路(39),并且液体制冷剂 比副制冷剂回路(39)更多地流入主制冷剂回路(38)。