Patent ID: 7100682

Claim:
A heat-exchanging device being attached to a box to form an approximately sealed inner space within the box, said heat-exchanging device comprising: a heat exchanger having therein a plurality of inside air passages extending substantially in a vertical direction through which inside air inside the box flows, and a plurality of outside air passages extending substantially in the vertical direction through which outside air outside the box flows, said inside air passages and said outside air passages are alternately adjacently arranged; a casing for accommodating said heat exchanger, said casing having an outer wall surface in which an outside air introduction port for introducing outside air into said outside air passages and an outside air discharging port for discharging outside air from said outside air passage are provided, and a seal member through which a boundary part between said inside air passages and said outside air passages of said heat exchanger is tightly attached to an attachment wall surface of said casing; wherein: said heat exchanger is disposed in said casing to form a space having a predetermined distance greater than zero between the heat exchanger and said outer wall surface, said space extending substantially in the vertical direction along approximately an entire length of said heat exchanger in the vertical direction; said outside air passages are provided to communicate with said outside air discharge port through said space; said heat exchanger includes a plate member having plural wall parts each of which is disposed opposite to said outer wall surface of said casing to define said inside air passages; said outside air passages are opened in said plate member to communicate with said space; said inside air passages and said outside air passages are provided in such a manner that both the outermost air passages of said heat exchanger are two of said inside air passages; and said wall parts defining the outermost inside air passages have flat attachment surfaces which are attached to said attachment wall surface of said casing through said seal member.