Heat exchanger

A heat exchanger comprising:

• a housing including a first housing and a second housing and a first space through which a cooling water flows is formed between the first housing and the second housing;
• a gas inflow pipe configured to flow exhaust gas into the housing and a gas exhaust pipe configured to discharge the exhaust gas to the outside of the housing;
• a cooling water inflow pipe configured to flow cooling water into the housing and a cooling water outflow pipe configured to flow out the cooling water heat-exchanged with the exhaust gas to the outside of the housing;
• a plurality of tubes extending in the housing in a longitudinal direction of the housing and through which the cooling water flowing therein through the cooling water inflow pipe flows;
• and
• a plurality of baffles installed in the housing and into which the plurality of tubes are inserted, the plurality of baffles being spaced apart from each other by a predetermined distance, wherein the baffle comprises:
• a first curved part configured to extend to be rounded with a first curvature,
• a first straight part configured to extend linearly from an end of the first curved part,
• a second straight part configured to extend linearly from the other end of the first curved part, and
• a second curved part positioned between the first and second straight parts and configured to extend to be rounded with a second curvature, and
• wherein the first straight part and the second straight part are formed in a direction crossing each other,
• wherein the first and second housings have cylindrical shapes with both sides open and further includes:
• a pair of headers coupled to both sides of the second housing and having a plurality of header insertion holes into which the plurality of tubes are inserted, and
• a pair of covers disposed on outside of the pair of headers and coupled to both sides of the first housing, and
• wherein a cover space is formed that is integrally open and communicates with the tube and the first space without being divided, is formed in a cover located at a rear of the pair of covers and configured to allow a flow direction of the cooling water flowing through the first space to change.