Heat exchanger and heat exchange ventilator

Abstract

A heat exchanger for realizing a high degree of humidity exchange efficiency at a low cost. The heat exchanger in which partition members respectively separated from each other by a spacing maintained by one of spacing members facilitate circulation of two different air flows, with total enthalpy heat exchange occurring between these two air flows via the partition members. The partition members comprise an air shielding sheet type material comprising a hydrophilic fiber and also including a moisture absorbent, and the air permeability (JIS P 8117) of the partition members is at least 200 seconds/100 cc.

1 . A method of manufacturing a heat exchanger of the type in which partition members respectively separated from each other by a spacing maintained by a spacing member to facilitate circulation of two different air flows, with total enthalpy heat exchange occurring between said two air flows via said partition members, wherein the method comprises the steps of: 
 applying a coating solution comprising a moisture absorbent and no flame retardant to a first base material for the partition members, the base material prepared by wet beating to obtain a fine hydrophilic fiber, making a paper in a warm water using the fine hydrophilic fiber, rolling a wet paper with a moisture content of 15 to 25% and subsequently calendaring the paper by compressing the paper with rollers,    corrugating a second base material having flame resistant properties for the spacing members, and    bonding the corrugated second base material to the first base material having the moisture absorbent.    
   
   
       2 . A method of manufacturing a heat exchanger of the type in which partition members respectively separated from each other by a spacing maintained by a spacing member to facilitate circulation of two different air flows, with total enthalpy heat exchange occurring between said two air flows via said partition members, wherein the method comprises the steps of: 
 applying a coating solution comprising a moisture absorbent, polyvinyl alcohol and no flame retardant to one side of a first base material for the partition members, the base material prepared by wet beating to obtain a fine hydrophilic fiber, making a paper in a warm water using the fine hydrophilic fiber, rolling a wet paper with a moisture content of 15 to 25% and subsequently calendaring the paper by compressing the paper with rollers,    corrugating a second base material having flame resistant properties for the spacing members, and    bonding the corrugated second base material to the first base material having the moisture absorbent.    
   
   
       3 . The method according to  claim 1 , wherein said moisture absorbent is lithium chloride.  
   
   
       4 . The method according to  claim 2 , wherein said moisture absorbent is lithium chloride.  
   
   
       5 . The method according to  claim 1 , wherein a thickness of said first base material is within a range from 10 micron to 50 micron.  
   
   
       6 . The method according to  claim 2 , wherein a thickness of said first base material is within a range from 10 micron to 50 micron.  
   
   
       7 . The method according to  claim 1 , wherein air permeability (JIS b  8117 ) of said partition members is at least 200 seconds/100 cc.  
   
   
       8 . The method according to  claim 1 , wherein the fine hydrophilic fiber comprises cellulose fiber.  
   
   
       9 . The method according to  claim 1 , wherein said second base material having flame resistant properties contains guanidine sulfamate.  
   
   
       10 . The method according to  claim 2 , wherein air permeability (JIS P 8117) of said partition members is at least 200 seconds/100 cc.  
   
   
       11 . The method according to  claim 2 , wherein the fine hydrophilic fiber comprises cellulose fiber.  
   
   
       12 . The method according to  claim 2 , wherein said second base material having flame resistant properties contains guanidine sulfamate.