Refrigerating system comprising a two-stage compression device.

摘要

The invention relates to a refrigerating system comprising a two-stage compression device, a condensor and at least two evaporators with throttling devices. The compression device is a two-stage free-piston compressor having two coaxially arranged cylinders in each of which a piston is movable, which pistons each influence a compression space with their head faces which are remote from each other and are rigidly connected to each other, the rigid connection carrying the moving part of a linear motor. Moreover, there is provided an electric control circuit by means of which both the stroke of the pistons and the centre position of the pistons can be controlled independently of each other by means of a voltage variation and a variation of the d.c. component respectively, so that the temperatures of the evaporators can be controlled independently of each other.