Ventilating apparatus, heat exchange apparatus, heat exchange element, and rib therefor

Abstract

A ventilating apparatus, a heat exchange apparatus, a heat exchange element, and a rib therefor are provided. The heat exchange element includes a plurality of heat exchange sheets which are multi-stacked, and a plurality of ribs arranged between the heat exchange sheets to form ducts with the heat exchange sheets. Each of the plurality of ribs includes an irregular structural surface including an uneven portion. The uneven portion may include a recess portion, a protrusion portion, or a combination of a recess portion and a protrusion portion, which generates a turbulent flow in a heat exchange gas flowing through the duct. Such heat exchange element having such a rib may minimize duct resistance by suppressing a laminar flow and growth of a boundary layer in airflow of outdoor and indoor air passing through a heat exchanger, and may further increase heat exchange efficiency because the heat exchange gas may be introduced/exhausted smoothly at a low flow velocity.

1 . A rib for a heat exchange element configured to guide a flow of heat exchange gas, comprising:
 at least one first surface that contacts a heat exchange sheet; and   at least one second surface that contacts the heat exchange gas, wherein the at least one second surface includes an irregular structural surface having an uneven portion.   
   
   
       2 . The rib according to  claim 1 , wherein the uneven portion includes a recess portion, a protrusion portion, or a combination of a recess portion and a protrusion portion provided on the at least one second surface. 
   
   
       3 . The rib according to  claim 1 , wherein a mean height of the at least one second surface corresponds to a value that minimizes pressure drop of the heat exchange gas. 
   
   
       4 . The rib according to  claim 1 , wherein a mean height of the at least one second surface corresponds to a value that minimizes velocity drop of the heat exchange gas. 
   
   
       5 . The rib according to  claim 1 , wherein a mean height of the at least one second surface is constant in a straight section of the rib. 
   
   
       6 . A heat exchange element comprising the rib of  claim 1 . 
   
   
       7 . A heat exchange apparatus comprising the heat exchange element of  claim 6 . 
   
   
       8 . A ventilation apparatus comprising the heat exchange apparatus of  claim 7 . 
   
   
       9 . A heat exchange element, comprising:
 a plurality of heat exchange sheets which are multi-stacked; and   a plurality of ribs arranged between the heat exchange sheets to form ducts with the heat exchange sheets, wherein each of the plurality of ribs comprises an irregular structural surface including an uneven portion.   
   
   
       10 . The heat exchange element according to  claim 9 , wherein the uneven portion includes a recess portion, a protrusion portion, or a combination of a recess portion and a protrusion portion, which generates a turbulent flow in a heat exchange gas flowing through the duct. 
   
   
       11 . The heat exchange element according to  claim 9 , wherein a mean height of the irregular structural surface corresponds to a value that minimizes internal pressure drop of the heat exchange gas. 
   
   
       12 . The heat exchange element according to  claim 9 , wherein a mean height of the irregular structural surface corresponds to a value that minimizes internal flow velocity drop of the heat exchange gas. 
   
   
       13 . The heat exchange element according to  claim 9 , wherein a mean height of the irregular structural surface is constant in a straight section of the rib. 
   
   
       14 . A heat exchange apparatus comprising the heat exchange element of  claim 9 . 
   
   
       15 . A ventilation apparatus comprising the heat exchange apparatus of  claim 14 .