HEAT EXCHANGER

PURPOSE:To make fluid to flow smoothly from the outflow port of the fluid into the deep part of an inlet tank and distribute it uniformly to respective tubes, by a method wherein a choke, choking the flow passage of the fluid in the bending direction of the flow passage, is formed between the bent part and the fluid outflow port of a substantially chevron-shaped inlet pipe connected to the inlet tank. CONSTITUTION:An inlet pipe 130 is provided with a first oval recess and a second oval recess in parallel while the first recess is provided with a fluid outflow port 131 opened toward a tank part to introduce refrigerant into the tank part. The second recess is provided with a communicating hole 133 commu nicating between tank parts. A flow passage 132, communicating with the first recess, is bent at a right angle substantially by bending the inlet pipe 130 so as to show a chevron shape at a bent part 130a. A choke 140, choking the flow passage 132 in the bent direction of the flow passage, is provided to chock refrigerant, flowing through the flow passage 132, in an arrow sign direction toward the fluid outflow port 131. As a result, the refrigerant flows out of the fluid outflow port 131 smoothly without generating any whirling stream.