Patent ID: 6948335
Filing Date: 2005-09-27
Classification: F04B,F25B

Abstract:
1. A compression mechanism forming a refrigerant circuit of a vapor compression refrigeration system, comprising: a refrigerant intake main pipe; n compressors with n being any integer equal to or greater than 3, which are arranged such that the second to n n oil separators with the first to n n oil return pipes arranged such that the first to n−1 oil return pipes are connected between oil outlets of the first to n−1 oil separators and intake sides of the respective second to n the first to k oil return pipes with k being integers from 2 to n−1 are connected to the intake side of the k+1 compressor so that oil is delivered to the first compressor when the first to k compressors are running and the k+1 to n compressors are stopped.