Patent ID: 8413715
Filing Date: 2013-04-09
Classification: F25B,F28D,F28F

Abstract:
1. A refrigerant evaporator comprising: a plurality of refrigerant tubes, each refrigerant tube of said plurality of refrigerant tubes having a refrigerant flow channel through which a refrigerant flows in a vertical direction, the plurality of refrigerant tubes being arranged in parallel in a direction perpendicular to a flow direction of an external fluid flowing outside the refrigerant flow channels and being arranged in a plurality of rows from front to rear in the flow direction of the external fluid; and a pair of upper and lower tanks for distributing or collecting the refrigerant, the tanks being disposed in the direction perpendicular to the flow direction of the external fluid and being connected to top ends and bottom ends, respectively, of the many refrigerant tubes, each tank having a partition wall partitioning the interior thereof into a first tank portion and a second tank portion that correspond to the plurality of rows of the refrigerant tubes in a row direction, wherein the first tank portion of the lower tank has a refrigerant inlet, and the second tank portion of the upper tank has a refrigerant outlet, the refrigerant flowing in through the refrigerant inlet, flowing sequentially into the refrigerant tubes in a plurality of blocks partitioned by partition plates disposed at a plurality of positions in the upper tank and partitioning each of the second tank portion and the first tank portion into two regions, and flowing out through the refrigerant outlet, wherein one of the plurality of blocks is a U-turn block where the refrigerant flows into the first tank portion of the upper tank in a direction along the partition wall, flows into the second tank portion of the upper tank, and is distributed and flows from the first and second tank portions of the upper tank into the plurality of refrigerant tubes, and wherein the partition wall partitioning the first and second tank portions of the upper tank has a plurality of refrigerant-distributing holes concentrated in a far-side region of the U-turn block, excluding a near-side region of the U-turn block, in a refrigerant flow direction, arranged in a longitudinal direction of the partition wall in the U-turn block so that the first tank portion of the upper tank communicates with the second tank portion of the upper tank.