Heat Exchanger

Abstract

A heat exchanger that includes a plurality of stacked frames. Between adjacent frames is sheet material that may be moisture pervious or impervious. Each frame has a plurality of baffles between which there is located a plurality of passages. The passages of adjacent frames are inclined by approximately 90°.

1 . A heat exchanger frame of generally rectangular configuration having two opposite sides, said frame having a plurality of baffles that extend between the opposite sides so as to provide a plurality of passages extending between the opposite sides, and wherein each baffle includes a longitudinally central portion that extends longitudinally generally diagonally relative to said opposite sides. 
   
   
       2 . The frame of  claim 1 , wherein each central portion extends at an acute angle relative to or of said sides. 
   
   
       3 . The frame of  claim 1 , wherein each central portion extends at approximately 45° to said opposite sides. 
   
   
       4 . The frame of  claim 1 , wherein the central portions are each generally linear. 
   
   
       5 . A heat exchanger including:
 a plurality of stacked frames, each frame being of a rectangular configuration so as to have four sides, a plurality of baffles extending between two opposite sides of said four sides so that adjacent baffles defining a passage extending between said opposite sides;   a sheet material located between adjacent frames and covering the passages of the adjacent frames and providing for the transfer of heat between fluid passing between the passages of adjacent frames; and   wherein a plurality of the passages of each frame include an entry passage portion, a generally central passage portion and an exit passage portion, with the generally central passage portion extending diagonally relative to said opposite sides.   
   
   
       6 . The heat exchanger of  claim 5 , wherein in respect of each passage, arcuate passage portions join the entry passage portion and the exit passage portion to the central passage portion. 
   
   
       7 . The heat exchanger of  claim 5 , wherein said central passage portion extends at approximately 45° to said opposite sides. 
   
   
       8 . The heat exchanger of  claim 5 , wherein each of said opposite sides includes a first side portion and a second side portion, with the first side portions being located directly opposite each other, and the second side portions being located directly opposite each other and wherein in respect of each passage of said plurality of passages, the inlet portions extending from a first one of the first side portions, and the exit portions extending from the second side portion of the other opposite side. 
   
   
       9 . The heat exchanger of  claim 8 , wherein each side portion extends approximately half the length of the respective side. 
   
   
       10 . The heat exchanger of  claim 5 , wherein the entry portions and the exit portions extend generally normal to their respective sides. 
   
   
       11 . The heat exchanger of  claim 5 , wherein the frames are arranged so that the central passage portions of adjacent frames are substantially perpendicular. 
   
   
       12 . The heat exchanger of  claim 5 , wherein said the sheet material is substantially moisture impervious. 
   
   
       13 . The heat exchanger of  claim 5 , wherein said the sheet material is moisture pervious. 
   
   
       14 . The heat exchanger of  claim 12 , wherein the sheet material is sheet polyethylene terephthalate. 
   
   
       15 . An air conditioning apparatus comprising the heat exchanger of  claim 5 . 
   
   
       16 . The air conditioning apparatus of  claim 15 , further including water sprays to deliver water to at least some of said passage portions. 
   
   
       17 . The heat exchanger of  claim 6 , wherein said central passage portion extends at approximately 45° to said opposite sides of the frame. 
   
   
       18 . The heat exchanger of  claim 17 , wherein each of said opposite sides includes a first side portion and a second side portion, with the first side portions being located directly opposite each other, and the second side portions being located directly opposite each other and wherein in respect of each passage of said plurality of passages, the inlet portions extending from a first one of the first side portions, and the exit portions extending from the second side portion of the other opposite side.