DISPLACEMENT MACHINE ACCORDING TO SPIRAL PRINCIPLE, METHOD FOR OPERATING DISPLACEMENT MACHINE, VEHICLE AIR-CONDITIONING FACILITIES, AND VEHICLE

摘要

To provide a displacement machine according to the spiral principle, in particular a scroll compressor, in which a counter-pressure chamber is formed between a low-pressure chamber and a spiral, the counter-pressure chamber being easily structured by different operating pressures.SOLUTION: A displacement spiral (31) has only one passage, which at least temporarily produces a fluid connection between a counter-pressure chamber and at least one of compression chambers (65a, 65b, 65c, 65d). In this case, a passage (60) is formed in such a portion of a displacement spiral (31) in which the passage (60) in the activated state of the displacement machine is opened on reaching of 85%-100%, in particular of 90%-100%, in particular of 95%, of the relative compression chamber volume, and remains opened during a subsequent rotation, after opening, of the displacement spiral (31) about a rotational angle of 120°-360°, in particular of 255°-315°, in particular of 270°.SELECTED DRAWING: Figure 2