VOLUME TRANSFER TYPE MACHINE OPERATED IN SPIRAL PRINCIPLE, METHOD FOR DRIVING VOLUME TRANSFER TYPE MACHINE, VOLUME TRANSFER TYPE SPIRAL, VEHICLE AIR CONDITIONING FACILITY AND VEHICLE

摘要

PROBLEM TO BE SOLVED: To improve an efficiency of a scroll compressor operated in spiral principle.;SOLUTION: A scroll compressor includes a high pressure chamber 40 enclosing a high pressure region and further a volume transfer type spiral 31 circulating around a low pressure chamber 30. The volume transfer type spiral is projected into and engaged with opposing spirals in such a way to form compression chambers 65a, 65b, 65c and 65d for receiving operation medium among the volume transfer type spiral and opposing spirals 32, and a back-pressure chamber 50 is formed between the low pressure chamber and the volume transfer type spiral. In accordance with this invention, the volume transfer type spiral has at least two perforation passages 60, 61, these perforation passages may generate fluid connected state at least temporarily between the back pressure chamber and at least one compression chamber. The first perforation passage 60 is substantially formed at a central zone of the volume transfer type spiral, and at least one second perforation passage 61 is formed at a starting region 37 of the volume transfer type spiral.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2018,JPO&INPIT