STORAGE TYPE WATER HEATER

PROBLEM TO BE SOLVED: To provide a storage type water heater improved in the heat insulation performance of a hot water storage tank by stabilizing the arrangement shape of a vacuum heat insulating material to the hot water storage tank. SOLUTION: The storage type water heater is provided with the vacuum heat insulating material 3 which is sealed in a low vacuum condition in a film exterior material 3b, whose core material consists of two of front and rear materials, and is bend-processed along the outline of hot water storage tank 1, wherein a frame 6 of a shape along the bending shape is joined to the outer edge 3c of exterior material 3. In the storage type water heater, the deformation is suppressed where the vacuum heat insulating material 3 tries to return to an original plate shape with a residual stress after rolling, the shape of vacuum heat insulating material 3 can be stabilized, and the dispersion of heat insulation performance can be suppressed. COPYRIGHT: (C)2011,JPO&INPIT