Importance

Loading Importance Indicators...

Abstract

In a heat exchanger, a respective meander passage 3₁, 3₂ in each of two stages connecting heat absorbing tubes 31 divided into the two stages and arranged in a flow direction of a combustion gas in an inside of a casing 1 from one side to the other side in a Y-axis direction is constituted, and both a heat absorbing tube 31 of #11 at an upstream end of the meander passage 31 in a first stage and a heat absorbing tube 31 of #21 at a downstream end of the meander passage 32 in a second stage are made to be positioned at the one side in the Y-axis direction, notches are provided with each heat absorbing fin 2 at portions positioned at a more upstream side in the flow direction of the combustion gas than each heat absorbing tube 31 of the meander passage 3₂ in the second stage, and first notches 22₁ corresponding to the heat absorbing tube 31 at a downstream end of the meander passage 3₂ in the second passage are formed larger than second notches 22₂ corresponding to each heat absorbing tube 31 other than the heat absorbing tube 31 of #21 at the downstream end.

Loading the Abstract Image...

First Claim