DEVICE FOR FROTHING MILK, COMPRISING MEANS FOR PREVENTING BLOCKAGE OF AN AIR RESTRICTION BY MILK RESIDUE

摘要

A device for performing a process of treating a liquid such as milk during which air is supplied to the liquid comprises a detachably arranged liquid treating unit and a basic part (3) which is suitable for receiving and accommodating the liquid treating unit. The liquid treating unit has an air restriction for taking in air to be used in the liquid treating processes, wherein the air restriction comprises a pin (11) and a hole for receiving the pin (11). In particular, the pin (11) is rotatably arranged in the hole, wherein means (15, 16, 17) are provided for causing a rotation of the pin (11) in case of a movement of the liquid treating unit in and/or out of the liquid treating device. In this way, an automated pin rotation mechanism is realized, whereby any blockage of the air restriction may be destroyed, and a reliable functioning of the air restriction is ensured.