Abstract: In order to quickly obtain high-precision full performance curve of refrigerator compressor under as few test conditions as possible, a new calculation and correction method of full performance curve is proposed. Firstly, the cooling capacity, inlet force and unit flow of a refrigerant under different working conditions are obtained by looking up the table with thermodynamic software. Secondly, according to the ten coefficient method, the ten coefficients of each performance of the compressor are obtained, and the theoretical full performance curve is drawn. Finally, through the experimental test of three operating points, the theoretical full performance curve is modified to obtain the real full performance curve. The experimental results show that the error of this method is small. Therefore, compared with the traditional method, the new method can obtain the full performance curve of the compressor simply, quickly and accurately.

Key words: Refrigerator compressor, Full performance curve, Curve fitting