To prevent heat from conducting between heat exchangers via a fin by finally dividing the fin for respective heat exchangers when the fin is assembled in a plurality of heat exchangers in a connected state.
Respective fins of respective heat exchangers are formed in the connected state via separable parts by a fin forming process W1. Respective fins are temporarily assembled in the connected state by a fin assembling process W2. The integrated heat exchangers with the temporarily assembled fins are passed through a heating furnace, and are brazed to respective heat exchangers by a fin fixing process W3. By dividing the fins in the connected state of respective heat exchangers from the separable parts by a fin separating process W4, respective heat exchangers can independently exchange heat without influencing the heat of the opposite side via the fins.
IKUI KAZUNORI
CHIKUMA HIROSHI
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