| 摘要 |
A header tank for a heat exchanger includes tank forming sections that are joined into a tubular shape with a substantially square cross-section. The header tank has a refrigerant low path formed inside the tank forming sections include a tank upper section ( 31 ) in which tube insertion holes ( 31 a) for connecting tubes of a heat exchanger core are formed. The tank lower section ( 33 ) having a substantially U-shaped refrigerant split-flow groove ( 33 A) that has, in its longitudinal direction, communication holes ( 33 a, 33 b) for the refrigerant. The tank forming sections include a plate section ( 35 ) for closing an opening of the refrigerant split-flow groove ( 33 A) to form a refrigerant split-flow path ( 37 ) inside the tank lower section.
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