PROBLEM TO BE SOLVED: To make cleaning and maintenance easy, to always maintain good hygienic condition, and reduce a cost and a manufacturing cost.SOLUTION: A heat exchanger for liquid has a cylindrical body part 2 having a heat exchanging cylindrical part 2p having an outer peripheral surface 2po and an inner peripheral surface 2pi in at least a part of the same, a liquid housing chamber Sw where the primary fluid Wf fed from the primary side feeding part 3s can come into contact with the whole surface of the outer peripheral surface 2po in the head exchanging cylindrical part 2p, further has the primary side fluid treating part 3 where the primary side fluid Wf in which heat is exchanged is discharged from the primary side discharging part 3e, and the secondary side liquid treating part 4 where the secondary side liquid Ls can come into contact with the whole surface the inner peripheral surface 2pi in the heat exchanging cylindrical part 2p by the secondary side liquid Ls fed from the secondary side feeding part 4s on the surface of the inner peripheral surface 2pi in the head exchanging cylindrical part 2p from above and the secondary side liquid Ls in which heat is exchanged is discharged from the secondary side discharging part 4e.COPYRIGHT: (C)2013,JPO&INPIT【課題】 洗浄及びメンテナンスの容易化を図り、常に良好な衛生状態を維持するとともに、部品コスト及び製造コストの双方の低減を図る。【解決手段】 外周面2poと内周面2piを有する熱交換筒部2pを少なくとも一部に有する筒状体部2と、一次側供給部3sから供給された一次側流体Wfが熱交換筒部2pにおける外周面2poの全面に対して接触可能な流体収容室Swを有し、かつ熱交換された一次側流体Wfが一次側排出部3eから排出される一次側流体処理部3と、二次側供給部4sから供給された二次側液体Lsが熱交換筒部2pにおける内周面2piの表面を上から流れ落ちることにより当該熱交換筒部2pにおける内周面2piの全面に対して接触可能にし、かつ熱交換された二次側液体Lsが二次側排出部4eから排出される二次側液体処理部4とを備える。【選択図】 図1
