Heat accumulator for vehicle

摘要

In a heat accumulator for a vehicle having a double tank structure comprised of an outer tank and an inner tank, which define therebetween an evacuated space, each of the outer and inner tanks has an opening. The opening of the outer tank and the opening of the inner tank are welded to each other over the entire peripheries thereof. A means for restricting vibration of the inner tank is provided in the accumulator. At least when the vehicle is stopped, the outer tank and the inner tank are not in contact with each other at any portion other than the welded portion.