< Topic >It achieves to set temperature efficiently, food such as wa pot desizing or the hot water the device which is washed is offered.SolutionsThe flue is designated as the egg die which directs the one which becomes pointed under. The seawater or the water where bottom of the kettle was warmed to rise between the flues, the seawater or the water above the kettle passing with the flue and the kettle, inflow underneath the kettle.< Choice figure >Drawing 2【課題】効率よく設定温度に達成する、わかめ等の食品を湯通し又は湯洗いする装置を提供する。【解決手段】煙道を尖った方を下に向けた卵型にする。釜の下側の温められた海水または水が煙道の間を上昇し、釜の上側の海水または水は煙道と釜との間を通過して釜の下側に流入する。【選択図】図2