Heat exchanger having projecting fluid passage

Abstract

A heat-transmitting plate member has a pair of heat-transmitting plates. Each of the plates is made from a resin material. The heat-transmitting plate member has an inner passage through which inner fluid flows and a tank portion communicating with the inner passage. The tank portion has a thickness thicker than that of a portion corresponding to the inner passage in the heat-transmitting plate member, so that desired heat-exchange characteristic at the inner passage can be obtained while desired ability to withstand pressure at the tank portion is obtained.

1 . A heat exchanger comprising: 
 a plurality of heat-transmitting plate members disposed adjacent to each other, each of which has an inner fluid passage member and a tank member integrally formed therein, wherein each plate member is connected to another plate member to form a core of a heat exchanger, a tank portion defined by said tank member communicates with an inner fluid passage defined by said inner fluid passage member:    wherein said plurality of heat-transmitting plate members are made from resin material.    
   
   
       2 . A heat exchanger according to  claim 1 , wherein said tank member has a thickness in a direction in which said plurality of heat-transmitting plate members are disposed adjacent to each other, thicker than that of said inner fluid passage member in said direction.  
   
   
       3 . A heat exchanger according to  claim 1 , wherein each heat-transmitting plate member includes two plates, each of which has a base plate portion which is attached to a base plate portion of another plate, wherein said inner fluid passage member projects outwardly with respect to said base plate portion when said two plates are attached to one another, and has a trapezoidal-like exterior shape.