| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To correctly detect any trouble of a flow rate sensor in a control device of a refrigeration cycle device having the flow rate sensor for detecting the refrigerant flow rate in a high-pressure side area to estimate the torque of a compressor based on the detected value of the refrigerant flow rate. <P>SOLUTION: Deviation of the first estimated torque to be estimated from the flow rate of a refrigerant to be detected by a flow rate sensor 7 in the control device and the second estimated torque to be estimated by a method not using the refrigerant flow rate, is detected, and presence/absence of any trouble of the flow rate sensor 7 is determined based on the result of the detection of the deviation of the estimated torque. By employing such a determination, any trouble related to the sticking of a sensing unit, the delay in response or the like can be detected in addition to the troubles such as an electric disconnection, a short circuit or the like of the flow rate sensor 7, and the trouble of the flow rate sensor 7 can be detected correctly. Thus, the torque estimation accuracy of a compressor can be enhanced thereby. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
