Patent ID: 7228891

Claim:
A heat exchanger of a ventilating system, comprising: a plurality of heat exchanging plates being laminated at a predetermined interval, each of the heat exchanging plates preventing airflow therethrough; a first heat exchange member being laminated among the heat exchanging plates, the first heat exchange member having a folded corrugated shape including a first plurality of upper bends, a first plurality of lower bends, a first plurality of wall portions connecting adjacent first upper bends and first lower bends, each first wall portion having a plurality of through holes arranged in both a longitudinal direction and a transverse direction therein, each of the first plurality of upper and lower bends extending substantially in the direction of the airflow, and the first heat exchange member being formed to increase turbulence of the outdoor air which flows while being attached on a first air path through which outdoor air passes; and a second heat exchange member which is laminated among the heat exchanging plates crossed with the first heat exchange member, the second heat exchange member having a folded corrugated shape including a second plurality of upper bends, a second plurality of lower bends, a second plurality of wall portions connecting adjacent second upper bends and second lower bends, each second wall portion having a plurality of through holes arranged in both a longitudinal direction and a transverse direction therein, each of the second plurality of upper and lower bends extending substantially in the direction of the airflow, and the second heat exchange member being formed to increase turbulence of indoor air which flows while being attached on a second air path through which the indoor air passes.