Heat storage tank

摘要

In the inventive heat storage tank, the welded portion 15 between the inner tank 11 and the outer tank 12 is not encircled by the housing 20 but opens outward in the radial direction of the tank body port 13, and a gap 3 is provided in the axial direction of the tank body port 13 between the welded portion 15 and a par of the housing 20 opposed to the welded portion 15 in the axial direction of the tank body port 13. Also, there is an elastic member 29 between the periphery 18 of the pipe-inserting hole 17 in the flow-straightening member 16 and the flange 26.