Heat exchanger, in particular block-in-shell heat exchanger comprising a separating unit for separating a gaseous phase from a liquid phase and for distributing the liquid phase

A heat exchanger for indirectly exchanging heat between a first medium and a second medium, comprising:

• a tank, which has an inner space for receiving the two-phase first medium
• a plate heat exchanger arranged in the inner space, for indirectly exchanging heat between the first medium and the second medium, the inner space being designed to receive the first medium with a filling height such that a liquid phase of the first medium forms a bath surrounding the plate heat exchanger, and
• an inlet for introducing the first medium into the inner space, characterized in that
• a separating unit forming a receiving space is provided in the inner space for separating the gaseous phase from the liquid phase of the first medium, the separating unit having at least one upwardly directed receiving opening for introducing into the receiving space first medium falling down in the inner space, the upwardly directed receiving opening being arranged above the filling height or at the filling height, so that the gaseous phase of the first medium that is received in the receiving space can escape via the receiving opening into the inner space, and a distributor that is in flow connection with the inlet and is arranged vertically above the receiving opening and also above the filling height being provided in the inner space, the distributor being designed to distribute the first medium over the receiving opening.