HEAT EXCHANGER FOR EXHAUST HEAT RECOVERY

摘要

PURPOSE: A heat exchanger for recovering the exhaust heat is provided to increase a heat transfer area while the air flow is maintained as the counterflow since an air guide unit of a wave shape is formed on the surfaces of the deposited heat transfer plates. CONSTITUTION: A heat exchanger for recovering the exhaust heat is composed of a first heat transfer plate and a second heat transfer plate. The first and second heat transfer plates are composed of hexagonal base plates, which comprise an inlet(11) and outlets(12,12'). The first and second heat transfer plates are alternately deposited and the supplied air and the exhaust air flow between them. A plurality of guide protrusions(13) and a plurality of auxiliary protrusions(14) are formed on the downstream of the inlet and the upstream of the outlets, respectively. An air guide unit(40) of a wave shape is formed on the inner surface of the middle part of the first and second heat transfer plates. A middle path of a groove shape, which partially cuts the air guide unit, is formed on the wave surface. The wave surfaces are formed on the first and second heat transfer plates to make double wave shapes.