| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerating cycle device capable of estimating a discharge pressure with high accuracy and using it for the prevention of an abnormal rise of discharge pressure and for the highly efficient operation of a refrigerating cycle by computing the enthalpy difference of a refrigerant and using adiabatic efficiency based on experimental data to estimate the discharge pressure. SOLUTION: The refrigerating cycle device comprises a refrigerant circuit 5 formed by connecting at least a compressor 1, a radiator 2, a pressure reducing mechanism 3 and an evaporator 4 annularly and circulating the refrigerant, and a discharge pressure estimating means 28 estimating the discharge pressure. The discharge pressure estimating means 28 estimates the pressure of the refrigerant discharged from the compressor 1 using an arithmetic expression. The discharge pressure is appropriately estimated without providing a pressure detecting means or a pressure switch, and the estimated discharge pressure is used to prevent the abnormal rise of discharge pressure and to operate the refrigerating cycle device with high efficiency. COPYRIGHT: (C)2010,JPO&INPIT
|
