Using overflow in a swash plate compressor for automotive air conditioning system

Given current environment protection problems, improvement of energy utilization efficiency is a major focus of compressor research. Overflow, a method in which the high-pressure gas in the clearance volume is fully used, is introduced in the design of a swash plate compressor. The coefficient of performance (COP) of the swash plate compressor with overflow channel has a certain decrease compared with the conventional compressor, but the volumetric efficiency and the cooling capacity of a swash plate compressor with overflow channel are visibly more improved than those of a conventional compressor in terms of the same operation and dimension parameters. The overflow has beneficial effect on miniaturizing the swash plate compressor. The intake and exhaust times considerably improve after the overflow channel is incorporated into the swash plate compressor. This, in turn, substantially enhances cooling capacity of the theoretical results from 869 to 953 W, an improvement by about 10 per cent in this article; however, COP decreases by about 3.7 per cent.