Stacked plate heat exchanger including a device for evaluating the extent to which it has become coated in scale

摘要

A plate-type heat exchanger including a plurality of stacked plates and a device for evaluating the extent to which the fluid circuit(s) have become coated in scale, whereby the evaluating device has an electrical resistor which is thermally connected to a plate located at the end of the stack while measuring the temperature in the immediate vicinity of the resistor.