Plate for heat exchanger

1. 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.

2. The heat exchanger according to claim 1 , wherein the guide bead is formed streamlined and tapers in width toward an end.

3. The heat exchanger according to claim 1 , wherein the refrigerant distributing sections provided in the inlet and outlet sides of the channel are symmetric with each other.

4. The heat exchanger according to claim 1 , wherein the refrigerant distributing sections provided in the inlet and outlet sides of the channel are asymmetric with each other.

5. The heat exchanger according to claim 1 , wherein the first beads are formed streamlined and satisfy an equation of 0.35≦W/L ≦0.75, wherein W is the width and L is the length.

6. The heat exchanger according to claim 5 , wherein the first beads have a spacing S between longitudinally adjacent ones of the beads, and the spacing S satisfies an equation of 0.3 mm≦S≦5.0 mm.

7. The heat exchanger according to claim 6 , wherein a center line C 1 of one row of the first bead intersects with a line C 2 connecting the center of a first bead in the other row at the shortest distance from the center of one bead on the center line C 1 at an angle a satisfying an equation 20°≦α≦70°.

8. 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 horizontal line of the 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 two pair of parallel tanks are provided at a top and a bottom of the tube, respectively, and the channel is partitioned into two separate channels by a separator vertically formed between the pairs of tanks.

9. The heat exchanger according to claim 8 , wherein the guide bead is formed streamlined and tapers in width toward an end.

10. The heat exchanger according to claim 8 , wherein the refrigerant distributing sections provided in the inlet and outlet sides of the channel are asymmetric with each other.

11. The heat exchanger according to claim 8 , wherein the guide bead is extended to a first row of the first beads.

12. The heat exchanger according to claim 8 , wherein the first beads are formed streamlined and satisfy an equation of 0.35≦W/L≦0.75, wherein W is the width and L is the length.

13. The heat exchanger according to claim 12 , wherein the first beads have a spacing S between longitudinally adjacent ones of the beads, and the spacing S satisfies an equation of 0.3 mm≦S≦5.0 mm.

14. The heat exchanger according to claim 13 , wherein a center line C 1 of one row of the first bead intersects with a line C 2 connecting the center of a first bead in the other row at the shortest distance from the center of one bead on the center line C 1 at an angle α, satisfying an equation 20°≦α≦70°.