Patent ID: 7172015

Claim:
A heat exchanger for a screw-type air compressor, comprising: a heat exchanger nest having a plurality of low temperature chambers through which cooling water flows and a plurality of high temperature chambers through which compressed air flows, the low temperature chambers and the high temperature chambers being alternately arranged in layers through a partition plate interposed therebetween, wherein the both ends of the layered heat exchanger nest are the low temperature chambers, wherein the number of the high temperature chambers is one less than the number of low temperature chambers, and wherein a flowing direction of the cooling water in the low temperature chambers and a flowing direction of the compressed air in the high temperature chambers are substantially orthogonal to each other; and a container for accommodating the heat exchanger nest, wherein the container is provided with a container side projecting seal formed on an inner side surface thereof, and the heat exchanger nest is provided with a nest side projecting seal formed on a side surface thereof, the container side projecting seal and the nest side projecting seal being coupled with each other through an elastically deformable seal member, so that a seal portion for partitioning the inside of the container is formed therein, wherein the seal member includes at least one of ethylene-propylene rubber, acrylic rubber, silicone rubber, and fluorocarbon rubber, as a principal component.