| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerating cycle suitable for an air conditioner for a vehicle capable of precisely estimating coolant flow rate to be used for estimating compressor torque by accurately detecting a difference between pressures before and after an orifice having a high correlation with the coolant flow rate, and thereby highly accurately estimating the compressor torque and achieving the estimation, while saving spaces and reducing cost. SOLUTION: This refrigerating cycle includes a subcool capacitor which is integrally provided with a condensing part of coolant, a liquid receiver and a subcooling part. The orifice is arranged to restrict a flow of the coolant passing through the condensing part of the subcool capacitor. The refrigerating cycle includes a pressure difference detection means capable of detecting the difference between pressures before and after the orifice, a coolant flow rate estimation means for estimating the coolant flow rate by referring to the detected pressure difference and a compressor torque estimation means for estimating the compressor torque by referring to the estimated coolant flow rate. COPYRIGHT: (C)2011,JPO&INPIT |
