| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress an atmospheric temperature rise in an outer case even if temperature of a reserve tank is raised due to a temperature rise of a heat carrier by containing a hot water storage tank, the reserve tank and an electric component board in the outer case having vents in the bottom face and the ceiling face. SOLUTION: A hot water storage tank 11, a reserve tank 16 and an electric component board 18 for controlling a circulation pump 15 are contained in an outer case 24 made of polyethylene resin. The outer case 24 is made by jointing the body section 24a and a bottom cover 24b and securing tem by means of screws. The body section 24a and the bottom cover 24b are made by blow molding, a rectangular opening 24c having periphery bending upward is made in the ceiling face of the body section 24a and a ventilation cover 24d is mounted on the opening 24c. Twelve small holes 24e (vents) are made, for example, in the lower surface of the bottom cover 24b and the ventilation area is set at 150 cm2, for example.</p> |
