The present invention relates to an evaporator, and more particularly, to an evaporator which can restrict a surface area of a communication hole with respect to a cross sectional area of a compartment and a surface area of a tube with respect to a surface area of a fin, thereby providing a dimensional extent for maximizing the heat exchange efficiency. Therefore, by optimizing a relation between the surface area of the communication portion and the surface area of the compartment of the first header tank and dimensions for each surface area and the heights of the tube and fin, the present invention provides a dimensional extent for maximizing the heat radiation amount, reducing the maximum temperature deviation of the core portion and allowing the refrigerant and air to be smoothly flowed, thereby maximizing the heat exchange efficiency.
1. An evaporator comprising first and second header tanks which form two compartments and disposed in parallel to be apart from each other in a distance; inlet and outlet pipes which are respectively formed at one side of the first header tank; a baffle which is provided in each of the first header tank and the second header tank so as to control a flow of refrigerant and; a core portion having a plurality of tubes of which both ends are fixedly disposed at the first and second header tanks to form a first row communicating with the inlet pipe and a second row communicating with the outlet pipe, and a plurality of fins which are interposed between the tubes,
wherein the core portion has a width Wcore of 20˜35 mm, and a communication portion having a communicating hole for communicating parts of the first and second rows is formed in the second header tank, and an area of the communicating hole is formed to be 70˜130% of a cross sectional area in the width direction of a compartment of the at least one or more compartments that is communicating with the first row communicating with the inlet pipe,
wherein an area of the communicating hole is formed to be 15˜30% of a surface area of the communication portion partitioned by the baffle of the second header tank, and wherein the evaporator comprises:
a first region in which the refrigerant introduced to the first header tank via the inlet pipe is flowed to the second header tank through a first subset of the tubes of the first row;
a second region adjacent to the first region in which the refrigerant flowed to the second header tank through the first region is flowed to the first header tank through a second subset of the tubes of the first row;
a third region adjacent to the second region in which the refrigerant flowed to the first header tank through the second region is flowed to the second header tank through a third subset of the tubes of the first row;
a fourth region in which the refrigerant flowed through the communication portion formed in the second header tank is flowed to the first header tank through a first subset of the tubes of the second row;
a fifth region adjacent to the fourth region in which the refrigerant flowed to the first header tank through the fourth region is flowed to the second header tank through a second subset of the tubes of the second row; and
a sixth region adjacent to the fifth region in which the refrigerant flowed to the second header tank through the fifth region is flowed to the first header tank through a third subset of the tubes of the second row, and the refrigerant is discharged through the outlet pipe.
2. The evaporator as set forth in claim 1 , wherein the communication portion has one communicating hole.
3. The evaporator as set forth in claim 1 , wherein each of the plurality of fins has a height Hfin of 4˜7 mm.
4. The evaporator as set forth in claim 3 , wherein each of the plurality of tubes has a height Htube of 2˜3 mm.
5. An evaporator comprising first and second header tanks which form two compartments and disposed in parallel to be apart from each other in a distance; inlet and outlet pipes which are respectively formed at one side of the first header tank; a baffle which is provided in each of the first header tank and the second header tank so as to control a flow of refrigerant and; a core portion having a plurality of tubes of which both ends are fixedly disposed at the first and second header tanks to form a first row communicating with the inlet pipe and a second row communicating with the outlet pipe, and a plurality of fins which are interposed between the tubes,
wherein the core portion has a width Wcore of 20˜35mm, and a surface area of each tube of the plurality of tubes in the core portion is formed to be 30˜50 % of a surface area of each fin of the plurality of fins, and a communication portion having a communicating hole for communicating parts of the first and second rows is formed in the second header tank,
wherein an area of the communicating hole is formed to be 15˜30 % of a surface area of the communication portion partitioned by the baffle of the second header tank, and wherein the evaporator comprises:
a first region in which the refrigerant introduced to the first header tank via the inlet pipe is flowed to the second header tank through a first subset of the tubes of the first row;
a second region adjacent to the first region in which the refrigerant flowed to the second header tank through the first region is flowed to the first header tank through a second subset of the tubes of the first row;
a third region adjacent to the second region in which the refrigerant flowed to the first header tank through the second region is flowed to the second header tank through a third subset of the tubes of the first row;
a fourth region in which the refrigerant flowed through the communication portion formed in the second header tank is flowed to the first header tank through a first subset of the tubes of the second row;
a fifth region adjacent to the fourth region in which the refrigerant flowed to the first header tank through the fourth region is flowed to the second header tank through a second subset of the tubes of the second row; and
a sixth region adjacent to the fifth region in which the refrigerant flowed to the second header tank through the fifth region is flowed to the first header tank through a third subset of the tubes of the second row, and the refrigerant is discharged through the outlet pipe.
6. The evaporator as set forth in claim 5 , wherein an area of the communicating hole is formed to be 70˜130 % of a cross sectional area in the width direction of the compartment of the at least one or more compartments that is communicating with the first row communicating with the inlet pipe.
7. The evaporator as set forth in claim 5 , wherein a density Dfin of the fins is 60˜78 FPDM (Fin Per Deci-Meter).