Heat exchanger

A motor vehicle, comprising:

• at least one heat exchanger that is supplied with a cooling air mass flow that changes depending on a travelling speed, the at least one heat exchanger including:
• a heat exchanger block with a plurality of flat tubes that are each received on a longitudinal end side in an associated passage opening of a tube sheet and provide a coolant path,
• a tank connected to the tube sheet and define a coolant header, and
• an additional element arranged on an outer edge or on an outer marginal region of the tube sheet, wherein the additional element includes a shielding element that projects over the outer edge or the outer marginal region to provide an at least partial covering of the tube sheet relative to the cooling air mass flow, and wherein the shielding element is arranged spaced apart from the tube sheet such that an air gap is disposed between the shielding element and the outer edge or the outer marginal region.

A heat exchanger of a motor vehicle that is supplied with a cooling air mass flow that changes dependent on a travelling speed, the heat exchanger comprising:

• a heat exchanger block with a plurality of flat tubes that are each received on a longitudinal end side in an associated passage opening of a tube sheet and provide a coolant path;
• a tank connected to the tube sheet and define a coolant header;
• and
• an additional element arranged on an outer edge or on an outer marginal region of the tube sheet, wherein the additional element is structured and arranged to provide an at least partial covering of the tube sheet relative to at least an inflow side;
• wherein the additional element includes a shielding element that is connected to the tank of the coolant header and projects over the outer edge or the outer marginal region of the tube sheet;
• wherein heat exchanger elements are arranged between the plurality of flat tubes, and the heat exchanger elements are arranged spaced apart from the tube sheet by a distance;
• and
• wherein the shielding element projects over the distance beyond the heat exchanger block and covers a cooling air bypass disposed within the distance.