COMBUSTION DEVICE

摘要

PURPOSE:To easily visually confirm the injection quantity and residual quantity of LPG in a fuel tank from the outside by disposing a plate member adapted to change in the transparency by getting wet between plural kinds of contents having different liquid holding capacities and a transparent window of the fuel tank. CONSTITUTION:A LPG fuel tank 1 is partially transparent in such a manner as to visually confirm the interior of the tank. Contents 10-12 having different particle sizes to have a difference in liquid holding capacity are packed in the interior of the tank. Thin film materials 13-15 different in leakage property are disposed on the transparent portions of the fuel tank corresponding to the contents having different liquid holding capacities, respectively, so that color changes according to quantity of held LPG to visually confirm the residual quantity by stages from the outside.