Importance

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Abstract

In a rotary compressor of a cooling or heat pump system, the inner volume relation should be related in a predetermined way to the pressure relation of the compressor for an optimal efficiency to be achieved. The built-in volume relation must therefore be variable to be adapted, for example, to full load and partial load. In order to achieve the highest efficiency with respect to loading requirements, a valve device has been developed, in which the outlet port is formed in such a way as to substantially correspond to the theoretically correct radial outlet port and in which a valve body (13) adapted for the purpose has its line of action oriented towards the outlet plane. The valve body is arranged in such a way that in its fully inserted position in the outlet port (12) the mantle wall will correspond to the mantle wall of the working space of the compressor, and will be adjacent to the rotors at a minimum amount of play by means of the end face having been provided with a pointed line (14) surrounded by two concave surface (15, 15). The outlet port (12 ) in the mantle wall of the working space of the rotary compressor is delimited by an outlet plane (9) of the compressor and by the screw lines in the mantle wall which correspond to the cam surfaces of the rotors, which cam surfaces interact in the direction of the outlet plane of the compressor.

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First Claim