Coolant equalizing reservoir with integrated vortex chamber spaced away from the reservoir wall along its entire circumference

A coolant equalizing reservoir for arrangement in a coolant circuit, comprising:

• a reservoir housing,
• a vortex chamber in the reservoir housing,
• a feed line for introducing coolant into the reservoir housing, and
• an outflow aperture for discharging coolant from the reservoir housing,
• where the feed line discharges into the vortex chamber, wherein the vortex chamber is defined by a wall protruding from a base-wall section of the reservoir housing along a vortex chamber's axis, encircling the vortex chamber's axis in a closed manner, which in every direction orthogonal to the vortex chamber's axis is arranged at a distance from the reservoir housing, wherein a flow baffle is arranged inside the vortex chamber, the flow baffle extending only along a circumferential section, but not completely closed about the vortex chamber's axis, where there is a gap having a gap spacing between an inner surface of the wall of the vortex chamber and a surface of the flow baffle facing towards the wall of the vortex chamber and along a flow path of the coolant in the gap, where the gap spacing in the flow path is constant along the vortex chamber's axis and becomes smaller and/or larger about the vortex chamber's axis to accelerate or decelerate the coolant in the vortex chamber.