Coffee machine comprising a frothing device and means for cleaning the frothing device and a milk suction line and process for rinsing the milk suction line

A coffee machine comprising:

• a frothing device having an internal milk channel leading to a frothing chamber into which opens a bypass air inlet for operable air supply to the frothing device;
• a flexible milk suction line to a milk supply container connected to the frothing device;
• means for cleaning the frothing device and the milk suction line with heated rinsing water from a continuous-flow water heater that flows via a path in a multi-path valve into the bypass air inlet, into the frothing device and into the milk suction line, wherein
• a milk suction end of the milk suction line is fluid-conductively connectable with a residual water pan prior to feeding the rinsing water to the bypass air inlet, and
• the multi-path valve further comprises:
• a first inlet connected with an air inlet,
• a second inlet connected with an outlet of the continuous-flow water heater,
• a first outlet connected with the bypass air inlet of the frothing device,
• a second outlet which is connected via a steam duct with the frothing device,
• a third outlet which is connected via a first hot water duct with a brewing unit of the coffee machine, and
• a fourth outlet which is connected via a second hot water duct with a hot water outlet.