Total heat exchange element

Abstract

In a total heat exchange element, a partition member has a heat transfer property, moisture permeability, and a gas blocking property. A spacer is formed in a hollow cylindrical shape polygonal in section extending substantially in parallel along the surface of the partition member and includes an overlapping wall that overlaps the partition member and supporting walls that rise from side ends of the overlapping wall and are vertically provided between the partition members respectively being upper and lower parts in a laminating direction to retain a space between the partition members. The overlapping wall has thickness smaller than that of the supporting walls and stuck to the partition member with an adhesive having moisture permeability.

1 . A total heat exchange element in which unit components each including a partition member and spacers are laminated with directions of the unit components alternately changed, flow passages, spaces among which are retained by the spacers, are formed among the partition members, two kinds of fluids are caused to pass through the flow passages adjacent to each other, and heat exchange is performed between the two kinds of fluids via the partition members, wherein
 the partition member has a heat transfer property, moisture permeability, and a gas blocking property,   the spacer is formed in a hollow cylindrical shape polygonal in section extending substantially in parallel along a surface of the partition member, and includes an overlapping wall that overlaps the partition member and supporting walls that rise from side ends of the overlapping wall and are vertically provided between the partition members respectively being upper and lower parts in a laminating direction to retain a space between the partition members, and   the overlapping wall has thickness smaller than that of the supporting walls and stuck to the partition member with a first adhesive having moisture permeability.   
     
     
         2 . The total heat exchange element according to  claim 1 , wherein
 the spacer is formed in a hollow space triangular in section formed by a singularity of the overlapping wall and a pair of the supporting walls, and   the spacers are arranged at a space with which an equivalent diameter de 1  of a cross section of a flow passage in the spacer and an equivalent diameter de 2  of a cross section of a flow passage formed by the spacers adjacent to each other and the partition members respectively being upper and lower parts in the laminating direction satisfy a relation 1.6≦de 2 /de 1 <2.   
     
     
         3 . The total heat exchange element according to  claim 2 , wherein an adhesive having moisture permeability is used as an adhesive for laminating and bonding the unit components, the adhesive being a second adhesive for bonding a top of the hollow cylindrical spacer triangular in section and the partition member of the adjacent unit component in the laminating direction. 
     
     
         4 . The total heat exchange element according to  claim 3 , wherein a material having a liquid absorption property is used as a material of the partition member and the spacer, and an adhesive obtained by mixing a water-soluble moisture absorbent in a resin emulsion adhesive containing water as a main solvent is used as the first adhesive and the second adhesive. 
     
     
         5 . The total heat exchange element according to  claim 4 , wherein any one of deliquescent alkali metal salt and deliquescent alkali earth metal salt or a mixture thereof is used as the water-soluble moisture absorbent. 
     
     
         6 . The total heat exchange element according to  claim 1 , wherein an adhesive that substantially loses moisture permeability after completion of bonding is used as a third adhesive for bonding the supporting walls and the overlapping wall.