Beverage making machine with a water heater and with a device to prevent scale deposits

摘要

The coffee making machine has a water heater with a hard water scale preventer having an ultrasound source inside the drawer. The ultrasound sender (4) has an ultrasound receiver (2) and an amplifier (5). The amplifier input is connected to the receiver and the output (7) to the sender. There is a heat insulation and sound damping layer (3) between the sender and receiver and the outer wall of the boiler.