Evaporator

1. An evaporator, comprising:

a first header tank and a second header tank disposed in parallel with each other, being spaced apart from each other by a predetermined distance and including at least one baffle that is partitioned by a barrier rib to form a first column and a second column to partition each of a first compartment and a second compartment in a width direction and partition a space in a length direction;

a plurality of tubes, each of which having both ends fixed to the first header tank and the second header tank, respectively; and

a pin interposed between the plurality of tubes,

wherein the first header tank is lengthily formed with a flow part in the length direction, the flow part being disposed separately from the first compartment and the second compartment.

2. The evaporator of claim 1 , wherein the first header tank includes:

a first inlet connected with one portion of the first compartment and configured to introduce a refrigerant;

an outlet connected with another portion of the first compartment and configured to discharge the refrigerant; and

a second inlet connected with one portion of the second compartment and configured to introduce the refrigerant,

wherein the flow part comprises a first communication hole that is adjacent to a formation region of the first inlet in the length direction to communicate with the second compartment and a second communication hole that is adjacent to a formation region of the outlet and the second inlet in the length direction to communicate with the first compartment.

3. The evaporator of claim 2 , further comprising:

a first region disposed in the first column, wherein the refrigerant introduced into the first compartment of the first header tank through the first inlet moves to the first compartment of the second header tank through at least one of the plurality of tubes and a second region in which the refrigerant of the first compartment of the second header tank moves to the first compartment of the first header tank through at least one of the plurality of tubes; and

third region disposed in the second column in which the refrigerant introduced into the second compartment of the first header tank through the second inlet moves to the second compartment of the second header tank through at least one of the plurality of tubes and a fourth region in which the refrigerant of the second compartment of the second header tank moves to the second compartment of the first header tank through at least one of the plurality of tubes, and

the refrigerant passing through both of the third region and the fourth region of the second column moves to the flow part through the first communication hole and moves in the length direction and is joined with the refrigerant discharged through the first region and the second region of the first column through the second communication hole to be discharged through the outlet.

4. The evaporator of claim 1 , wherein the first header tank includes a header and a tank coupled to one another.

5. The evaporator of claim 4 , wherein the tank of the first header tank is formed in the width direction and includes a depressed part being lengthily formed in the length direction,

wherein a central region of the depressed part is formed with the barrier rib, and

wherein the first header tank includes a first formation member disposed to cover the depressed part of the tank, so that a portion surrounded by the depressed part of the tank and a first formation member form the flow part.

6. The evaporator of claim 5 , wherein the tank is inclined to the barrier rib so that the depressed part has a “Y”-letter shape along with the barrier rib.

7. The evaporator of claim 5 , wherein the first header tank includes at least one first protruded bead that is protruded to the flow part to support the first formation member is disposed on the depressed part.

8. The evaporator of claim 7 , wherein the first formation member includes extensions that extend to contact at least two of the surfaces of the first protruded beads vertically to the length direction of the first header tank.

9. The evaporator of claim 5 , wherein both ends of the first header tank include an end cap including a plate part and a support part that is protruded in a form in which a predetermined region of the plate part corresponds to a space of the flow part to support the first formation member.

10. The evaporator of claim 9 , wherein one of the end caps disposed at both ends of the first header tank includes a first hollow hole of which a predetermined region corresponding to the first compartment in the predetermined region of the plate part is hollowed and a second hollow hole of which a predetermined region corresponding to the second compartment in the predetermined region of the plate part is hollowed, and

the other one of the end caps includes a third hollow hole of which a predetermined region corresponding to the first compartment in the predetermined region of the plate part is hollowed.

11. The evaporator of claim 4 , wherein the first header tank has the flow part including a second formation member that partitions one portion or both portions of the first compartment and the second compartment formed by the coupling of the header and the tank in a height direction.

12. The evaporator of claim 11 , wherein the second formation member includes:

a partition plate that partitions one portion or both portions of the first compartment and the second compartment in the height direction; and

a support surface that extends from the partition plate to be adhered to the barrier rib and an inner surface of the first header tank.

13. The evaporator of claim 12 , wherein the header of the first header tank includes a second protruded bead that is protruded so as to support the second formation member.

14. The evaporator of claim 13 , wherein, in the first header tank, the support surface of the second formation member is adhered to the inner surface of the first header tank and a bent part bent so that the predetermined region of the end surrounds the end of the first header tank is formed.

15. The evaporator of claim 12 , wherein the second formation member extends from the first header tank.

16. The evaporator of claim 12 , wherein the second formation member extends from the header.

17. The evaporator of claim 16 , wherein the first header tank includes a partition plate of the second formation member that extends from the header, the partition plate having a tank fixing groove and wherein both ends of the tank are inserted into the tank fixing groove.

18. The evaporator of claim 4 , wherein the first header tank includes a third formation member coupled with an outer surface of the tank to form the flow part formed therein.

19. The evaporator of claim 1 , wherein the first header tank is formed in an extrusion tank type.