Patent ID: 7934541

Claim:
A heat exchanger comprising a tube formed by two plates and including a cup forming a tank communicating with a channel, a number of first beads projected inward and so arrayed in each plate such that opposed sides of the first beads are coupled to each other to impart turbulence to refrigerant flowing through the channel and refrigerant distributing sections provided in inlet and outlet sides of the channel and divided by a plurality of second beads projected inward and coupled to each other to have a plurality of paths around the second beads, wherein at least one of the second beads is extended further towards an adjacent row of the first beads than the other second beads and is a guide bead, wherein the first beads in the adjacent row are aligned in a horizontal direction and wherein a perpendicular distance between the guide bead and a horizonal line of an adjacent array of the first beads is shorter than a perpendicular distance between the other second beads and the horizontal line of the adjacent array of the first beads, so that refrigerant flowing through refrigerant distributing section is uniformly distributed into the channel, wherein at least one of the second beads is integrally projected from the cup toward the channel and separate the paths, and wherein the first and second beads are arranged in the channel and let the refrigerant flowing through the channel flow around and contact the first and second beads wherein a pair of parallel tanks are provided at a top of the tube, the channel forms a U-shaped channel by a separator extended from between the pair of tanks to vertically partition a predetermined portion.