Urea solution mixing chamber for diesel vehicle

A urea solution mixing apparatus for a vehicle, the urea solution mixing apparatus comprising:

• a flow guide configured to guide a flow of exhaust gas while collecting the flow of the exhaust gas toward a catalyst;
• a urea solution injector disposed rearward of the flow guide and configured to distribute and inject a urea solution into the flow guide;
• an impactor provided on an internal surface of the flow guide configured to collect the exhaust gas, the impactor being configured to atomize the urea solution injected from the urea solution injector;
• and
• at least a vaporization fin configured to vaporize the atomized urea solution by bringing the atomized urea solution into contact with the at least a vaporization fin and mix the vaporized urea solution with the exhaust gas,
• wherein a middle portion of an end portion of the impactor adjacent to the at least a vaporization fin is formed in concave, and a middle portion of an end portion of the at least a vaporization fin adjacent to the impactor is formed in convex.