Scroll compressor for a vehicle air-conditioning system

Abstract

The invention relates to a scroll compressor for a motor vehicle air-conditioning system. The scroll compressor includes a compressor housing, two interleaving spirals 1 within the compressor housing,of which one spiral 1.1 is stationary and the other spiral 1.2 is movable eccentrically on a circular orbit, whereby the volume of compression chambers 15.1,15.1';15.2,15.2';15.3 formed between the spirals changes cyclically and refrigerant is suctioned in and compressed; at least one refrigerant outlet port for ejecting the compressed refrigerant in a wall, frontal to the spirals 1, of the compressor housing in the center of the stationary spiral 1.1, wherein in the spiral end region on the inner end 2 of at least one of the two spirals 1.1, 1.2 the concave side 3 of the spiral wall is provided with a cut that has the form of a cone segment with concave curvature, decreasing from the upper end 6 in the direction toward the lower end of the spiral wall.

Description

technical field [0001] The invention relates to a scroll compressor for an air-conditioning system in a motor vehicle, which scroll compressor has two mutually alternating spirals, at least one of which has a chamfer on its inner end. Background technique [0002] The term scroll compressor is the usual designation in technical parlance for types of compressors which are also known as worm drive compressors, screw compressors or screw compressors. Scroll compressors work on the displacement principle. Said scroll compressors generally consist of two interlaced spirals, one of which is stationary and the other moves eccentrically on a circular trajectory. In this case, the spirals are kept at a minimum distance from each other and form two progressively smaller compression chambers with each revolution. The gas to be pumped is thereby sucked in from the outside, compressed inside the scroll compressor in a compression chamber and discharged via a port in the screw core. ...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the known prior art is that there is contact between the fixed and moving helix in the region of the chamfer

A further difficulty caused by corresponding designs in the prior art is the considerable reduction of the wall thickness at the end section and the associated reduction of the end face for the discharge of the small volume of refrigerant after compression.

A suboptimal refrigerant flow towards the refrigerant outlet of the scroll compressor is another problem, since the less than ideal refrigerant flow leads to increased torque and increased pressure at the chamfered walls in the end region ( overpressure), and this leads to an unbalanced force / torque volume in the middle of the helix, wherein the suboptimal refrigerant flow

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