Total heat exchange element

Abstract

A total heat exchange element includes a first flow passage and a second flow passage extending orthogonal thereto. The first flow passage is an undulating flow passage that has a rectangular cross section and is formed by positioning a first wave-form plate member and a second wave-form plate member on top of each other and with a predetermined interval therebetween, and further causing spacers to hermetically close two lateral portions with respect to the traveling direction of the fluid. The second flow passage is a straight flow passage that has a substantially triangular cross section and is formed between a flat-plate-like member and one of the first and the second wave-form plate members.

1 . A total heat exchange element in which a first fluid and a second fluid are respectively caused to flow through a first flow passage and a second flow passage that are formed between plate members stacked in a manner of layers so as to extend in directions intersecting each other, so that sensible heat as well as latent heat are exchanged between the first fluid and the second fluid, wherein
 the first flow passage is an undulating flow passage that has a rectangular cross section and is formed by positioning a first wave-form plate member that has moisture permeability and is shaped in a form of a wave undulating in a layer stacking direction toward a traveling direction of the fluid and a second wave-form plate member that has moisture permeability and is shaped in a form of a wave undulating substantially in a same cycle as the first wave-form plate member, on top of each other and with a predetermined interval therebetween, and further causing hermetically-closing members to hermetically close two lateral portions with respect to the traveling direction of the fluid, and   the second flow passage is a straight flow passage that has a substantially triangular cross section and is formed between a flat-plate-like member having moisture permeability and one of the first and the second wave-form plate members, when the flat-plate-like member is positioned on a wave-like surface of the one of the first and the second wave-form plate members so as to be in close contact therewith,   the total heat exchange element further comprises a plurality of unit structuring members stacked in a manner of layers while being turned by 90 degrees for each of the layers, each of the unit structuring members being configured with a set made up of the first wave-form plate member, the second wave-form plate member, and the flat-plate-like member.   
     
     
         2 . (canceled) 
     
     
         3 . The total heat exchange element according to  claim 1 , wherein a difference between a height of a wave-like form of the first wave-form plate member and a height of a wave-like form of the second wave-form plate member is larger than a layer-stacking-direction distance between the first wave-form plate member and the second wave-form plate member. 
     
     
         4 . The total heat exchange element according to  claim 1 , wherein each of bending parts at apexes of wave-like forms of the first wave-form plate member and the second wave-form plate member is shaped so as to be in an arched form having a curvature so that no dead water region occurs while the first fluid and the second fluid are flowing. 
     
     
         5 . The total heat exchange element according to  claim 1 , wherein at least one partition wall that divides the undulating flow passage having the rectangular cross section into a plurality of sections with respect to a width direction thereof and that enables the first and the second wave-form plate members to support each other is provided between the first wave-form plate member and the second wave-form plate member. 
     
     
         6 . The total heat exchange element according to  claim 5 , wherein a plurality of partition walls are provided, and
 the partition walls provided in a predetermined position is configured so as to have a larger thickness with respect to the width direction of the flow passage than thicknesses of other partition walls provided in other positions.   
     
     
         7 . The total heat exchange element according to  claim 1 , wherein the first wave-form plate member, the second wave-form plate member, and the flat-plate-like member are configured by using a material that has gas blocking property and that contains an alkali metal salt and an alkaline earth metal salt that are water soluble and deliquescent.