Modular heat exchanger

Claim 1

A modular heat exchanger for a fluid flow, comprising: a plurality of modules formed from heat transfer material, each module having a generally rectangular cross section and a through bore extending longitudinally along an axis therethrough between parallel opposite faces; each face including a set of equally spaced slots extending fully across the face in the direction transverse to the longitudinal axis of the through bore so as to define a series of parallel planar fins, and including a set of equally spaced, parallel channels extending fully along the face in a direction parallel to the longitudinal axis of the bore, said channels defining in each parallel fin a plurality of spaced, generally triangular teeth said teeth defining fin outer edges, a portion of the outer edges of the fins of a module abutting the outer edges of the fins on an adjacent module when the modules are placed together in face-to-face contact to define air flow passages; and, each of said teeth having a bent portion displaced at least partially from the plane of the fin to protrude into the adjacent air flow passage to create air flow turbulence.