| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a freezing apparatus which is constituted to make the inlet quantity of a coolant of an expansion mechanism variable while recovering the energy of a high-pressure coolant as the power to the maximum by the expansion mechanism. <P>SOLUTION: The expansion mechanism 50 is equipped with two rotary mechanism units (70 and 80) having displacements made different from each other. These rotary mechanism units are connected in series, and the rotary mechanism unit of the smaller displacement has two inlet ports (55 and 56) formed in its cylinder (71). Inlet pipes (24 and 27), as connected to the inlet ports (55 and 56), are equipped with a front throttle valve (60) and a switch valve (61). A bypass pipe (65) for bypassing the expansion mechanism (50) is equipped with a bypass valve (66). These valves (60, 61 and 66) are controlled to attain a balance between the coolant circulation rate of the expansion mechanism (50) and the coolant circulation rate of a compression mechanism (40). <P>COPYRIGHT: (C)2012,JPO&INPIT |
