| 摘要 |
PURPOSE:To enable the uniform and quick freezing of a bonito in high quality, by throwing an untreated bonito in a calcium chloride brine tank, precooling the fish body in the course of floating on the brine surface, and freezing the bonito in a state immersed completely in the brine. CONSTITUTION:An inlet pipe 10 from a calcium chloride brine cooler 1 and a return pipe 11 are opened in the calcium chloride brine tank 2, which is sealed with a suppressing plate 7 at the top. A bonito-introducing pipe 6 having opened top 6a is extended through the suppressing plate 7 and ended with an opening at a part close to the bottom of the tank 2. A subsidiary feeding pipe 5 of brine is extended from the cooler 1 to the top of the introducing pipe 6 or thereabout. Every parts of a bonito can be frozen uniformly and quickly preventing the blackening of the meat. The causes for the lowering of the meat quality such as cracking of meat can be prevented by the precooling of the bonito during the floating motion to enable the maintenance of the excellent appearance.
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