Patent ID: 9709340
Date: 2017-07-18
CPC Classifications: F28F

Claim:
1. A heat exchanging apparatus in which a base in which a flow passage for fluid is formed is jointed to a sealing plate sealing the flow passage to form an airtight flow passage, the flow passage comprising: first flow passages opened outside in a surface of the base, elongated in one direction, and formed in a plurality of stages in one direction of the base at required intervals; and a plurality of second flow passages perpendicular to the first flow passages and connecting adjacent flow passages of the first flow passages in a communicating manner, in a structure of the heat exchanging apparatus where a flow passage is formed such that fluid introduced into a first flow passage of the first flow passages located at one end to pass through the first flow passage located at one end and the second flow passages and reach a first flow passage of the first flow passages located at the other end, and fluid introduced into the flow passage impinges perpendicularly against walls of the first flow passages to perform heat exchange, and the fluid is discharged from a fluid outlet hole located at the other end of the flow passage, wherein a flow speed in the second flow passages is higher than a flow speed in the first flow passages, wherein two or more of the following conditions are satisfied: