| 摘要 |
An object accommodated in an internal space of a freezer is quickly cooled to a predetermined temperature with preventing water from freezing while an oscillating electric field of, preferably, a variable frequency in the range of 50 Hz to 5 MHz and/or a magnetic field are applied to the object, or further ionic air is added to clod air, and subsequently the object is instantaneously frozen at the predetermined temperature. Preferably, the magnetic field is a static magnetic field and/or a variable magnetic field. <??>A variable magnetic field-generating means includes a plurality of electromagnetic coil units, each including a coil base for forming a coil and an electromagnetic coil formed of a highly conductive wire wound around the base, the coil being sealed with a caulking compound. The electromagnetic coil units are disposed in parallel, in series, or crosswise along a holder so as to be across the holder, or so as to surround or sandwich the holder. Thus, a variable magnetic field with a uniform intensity can be applied to the object to be frozen or subjected to other treatments. <IMAGE>
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