Climate test chamber and procedure for regulating the coolant cycle of a climate test chamber

摘要

Climatic test chambers are known whose coolant circuit comprises a compressor, a heat exchanger and a condenser. The circuit is regulated by a shut-off valve on the inlet side of the heat exchanger. In order to optimise such a circuit, that is to say to permit an improved cooling performance with the same size of compressor, in order further to minimise control fluctuations, the shut-off valve is a motor-driven quasi-constant expansion valve and a condensation pressure measuring sensor is arranged on the pressure side of the compressor. A method for regulating such a coolant circuit is also provided.