| 摘要 |
<P>PROBLEM TO BE SOLVED: To reliably decide abnormal conditions in an expansion valve, even in a case when a valve opening of the expansion valve is controlled on the basis of a temperature difference between a temperature inside and an inlet-side temperature of an evaporator. <P>SOLUTION: This refrigerating cycle device 10 including a refrigerant circuit 7 including a compressor 18, a radiator 19, the expansion valve 8 and the evaporator 11, further includes a control device 9 for controlling the compressor 18 and the expansion valve 8. The control device 9 controls an operation of the compressor 18 on the basis of the temperature inside PT cooled by the evaporator 11, controls the valve opening of the expansion valve 8 so that the temperature difference Te between the temperature inside PT and the evaporator inlet temperature EINT reaches a predetermined target temperature difference Tes, and decides the abnormal conditions in the expansion valve 8 when the temperature difference Te is reduced to a predetermined limit value Te, and the state continues for a predetermined time period t3 or t4. <P>COPYRIGHT: (C)2012,JPO&INPIT |
