CYLINDER SIDE INLETS FOR IMPROVING VOLUMETRIC EFFICIENCIES OF RECIPROCATING REFRIGERATION COMPRESSORS

摘要

For this Compressor Technology Conference, this paper is presented with the following thoughts in mind. One being that the information presented here is of academic interest. Secondly, the information presented here could be used in late designs of refrigerant compressors. In 1938 Charles R. Neeson patented an idea which is little used today. This patent was studied and as a result three things were concluded: 1. An actual improved volumetric efficiency can be obtained over standard compressor by the use of side inlet ports as depicted by Charles Neeson. The idea is shown in Fig. 1 as depicted by Mr. Neeson. 2. Engineers can see that cylinder capacity can be reduced also by moving the side inlets up further into the compression stroke of the piston cylinder arrangement as shown in Fig. 2. 3. A yet unexplored third use of the side inlet ports can be used for compressors in the high compression ratio range where additional lubrication of the piston ring as well as the suction and discharge valving is needed. By placing the inlet port at the near bottom dead center of the compression stroke, and by proper design where these Inlets communicate to the crankcase an oil mist could be admitted into the cylinder chamber (See Fig. 3).