| 摘要 |
PURPOSE:To make the connection of a heat collecting board and a water passing pipe rigid by a method wherein securing of the water passing pipe to the heat collecting board is effected by the injection foaming of the insulating material of an expandable resin to facilitate the work therefor and adhere the water passing pipe to the heat collecting board by a foaming pressure. CONSTITUTION:The peripheral part of the substantially wavy heat collecting board 8, formed with a solar heat absorbing film 7, is put on an intermediate horizontal wall 2c on the upper surface of a hot-water heater case equipped with a frame 1 and a bottom wall 6 while the straight part of the meandering water passing pipe 10 is entered loosely into a groove 9 on the upper surface of the heat collecting board 8. A lower jig 11 of flat plate is applied to the lower surface of the bottom wall 6 while an upper jig 12 of flat plate is applied along the upper surface of the heat collecting board 8. Under this condition, the insulating material 14 of expandable resin is injected from an insulating material injecting port 13, provided in the frame 1, inbetween the bottom wall 6 and the heat collecting board 8 to foam it. Then, the foaming pressure is impressed to the wall of the groove 9 and the wall of the groove 9 is adhered to the whole peripheral surface of the water passing pipe 10 substantially. |
