To prevent the brazing material on the surface of a header pipe from entering the inside of a through hole when a connection block for connection of a liquid tank is brazed in a furnace to the header pipe, pipe-shaped projections are formed on the header pipe connection side of a pair of through holes which are formed in the connection block for connection of the liquid tank and through which the refrigerant enters and exits, the projections are inserted into the holes of the header pipe cladded with brazing material, and it is integrally fused with the capacitor.