Abstract: An apparatus may include a heat exchanger and an equalizing vessel for equalizing changes in coolant volume. The heat exchanger may include an inflow for delivering coolant to the heat exchanger and an outflow for discharging coolant from the heat exchanger. The equalizing vessel may be closed off by a flexible membrane that follows changes in volume of the coolant. The equalizing vessel may include a first chamber that is in liquid communication with the inflow of the heat exchanger and a second chamber that is in liquid communication with the outflow of the heat exchanger. A filter may also be provided to filter the coolant.

Abstract: A heat exchanger serves to cool a cooling medium, which in turn is intended to cool an electronic component (76). The heat exchanger has an inflow (64) for delivery of hot coolant, and an outflow (68) for discharge of coolant cooled in the heat exchanger. An equalizing vessel (30) is joined to the heat exchanger to form one module. The vessel serves to equalize changes in coolant volume. The equalizing vessel (30) is closed off by a flexible membrane (54) which follows such changes in volume. The equalizing vessel (30) is implemented as a component of the coolant circuit. One part of the equalizing vessel is implemented as a component of the inflow (64) and another part as a component of the outflow (68), which parts are in liquid communication with one another via a switchback path through passages (22) within the heat exchanger (20) that is implemented in double-flow fashion.