Problem to be solved: to provide a method for preserving blood without reducing an amount of blood without adding an additive, a method for preserving fresh fish in which the lowering of the freshness is suppressed, and a vibration removing apparatus used for the transportation of the refrigerant or the frozen liquid used in the freezing and storing method.Solution: the blood or fish is quenched to a first cooling temperature in the range of - 4 to - 6 degrees C and slowly cooled at a rate of - 1.5 ° C \/ hour to - 0.5 ° C \/ hour to a second cooling temperature in the range of 7 to 13 ° C which is lower than the first temperature and is freezing temperature. A vibration removing device for branching a refrigerant tube of refrigerant or frozen liquid supplied from a refrigerator or inserting a half wavelength retarder by multiple reflection and removing the vibration of the refrigerator by interference.Fig. 7 (a)【課題】添加物を用いず溶血を抑えた血液凍結保存方法、更に鮮度の低下を抑えた生鮮魚冷凍保存方法、及びこれらの凍結保存方法に使用する冷媒又は冷凍液の輸送に用いる振動除去装置の提供。【解決手段】血液又は魚肉を-4~-6°Cの範囲の第1冷却温度に急冷し、第1の温度より低くかつ凍結温度である-7~-13°Cの範囲の第2冷却温度に-1.5°C/時間~-0.5°C/時間の速さで緩慢に冷却する。冷凍機から供給される冷媒又は冷凍液の輸送管を分岐し、一方に多重反射による半波長遅延装置を挿入し、冷凍機の振動を干渉により除去する振動除去装置。【選択図】図7A
