Patent ID: 6073686
Filing Date: 2000-06-13
Classification: F28D,F28F

Abstract:
A high efficiency modular OLF (oblique louver fin) heat exchanger with heat transfer enhancement, comprising:two length adjustable side pipes vertically positioned at both sides of the heat exchanger, either of said two side pipes having inlet and outlet tubes at both ends thereof, said two side pipes individually comprising:a plurality of header pipes having predetermined different lengths and selectively assembled with each other into a side pipe in order to accomplish a desired size and heat exchanging capacity of the heat exchanger, each of said header pipes having a plurality of fitting slits regularly arranged in an axial direction; anda plurality of header pipe sockets individually having an open ring or a blocking disk and linearly coupling said header pipes into a side pipe with the sockets having rings and the sockets having disks being alternately arranged on the side pipe, said sockets thus alternately opening and closing the side pipe so as to change a fluid path of the heat exchanger;a plurality of multi-channeled flat tubes fitted into the fitting slits of two opposite header pipes at both ends thereof, thus extending horizontally between the two header pipes while being regularly spaced, each of said flat tubes being obliquely cut at a cutting angle "".theta."" at both ends thereof and having an oblique louver fin on a top wall thereof, said louver fin being repeatedly and obliquely cut at an angle of attack "".beta."" on its surface, thus having a plurality of oblique strips, said strips allowing a main gas flow to collide thereon when the gas flow passes by the louver fin; andtop and bottom support frames horizontally extending at top and bottom ends of the heat exchanger while being held by the two side pipes using a plurality of end caps, thus supporting the flat tubes while blocking both ends of a side pipe free from any inlet or outlet tube,whereby the flat tubes, assembled with the two opposite header pipes, form a module having a predetermined heat exchanging capacity, so that the heat exchanger is formed by assembling a selected number of modules into a single body using sockets and the support frames, thus having a desired heat exchanging capacity.