FLOW PASSAGE CONNECTING APPARATUS FOR HEAT EXCHANGER

摘要

A flow passage connecting apparatus for a heat exchanger includes: a boss formed of a resin material in a cylindrical shape and having a plurality of through-holes to allow one end of a heat exchanger tube made of a resin material to be inserted from one side; and a coupler made of a resin material and having a body portion formed in a cylindrical shape. The body portion is configured to accept a part of the boss on the other side opposite to the one side inside. The connecting apparatus further includes first and second seal structures sealing a space between the boss and the body portion. The body portion has a communication hole formed in a space between the first and second seal structures to communicate between the inside and outside of the body portion.