PROBLEM TO BE SOLVED: To provide a thawing apparatus which is obtained by subjecting one terminal at the secondary side of a voltage-increasing transformer for increasing the voltage of an alternating current to insulation treatment, and connecting the other terminal at the side through a resistance to the object side when applying the voltage to the frozen object, and can easily and safely change the applied voltage value.SOLUTION: The thawing apparatus includes a voltage-applying device 7 for applying the alternating voltage to the frozen object W and keeps the voltage-increasing transformer 16 for increasing the voltage of the alternating current from an electric source 12 installed in the voltage-applying device 7 with one terminal at the secondary side of the voltage-increasing transformer 16 subjected to the insulation treatment, and the other terminal electrically connected through the resistance 34 to the object W side, so that the thawing treatment of the object W is carried out by the application of the voltage to the object W by the voltage-applying device 7, wherein a thawing chamber 1 storing the object W is formed to electrically ground the inner wall 2a of the thawing chamber 1 to arrange a regulating transformer 13 can change a transformation ratio between the voltage-increasing transformer 16 and the electric source 12 in the voltage-applying device 7, and to install a preventing means 27 for preventing a large current over a prescribed value from flowing through the secondary side of the regulating transformer 13.COPYRIGHT: (C)2012,JPO&INPIT【課題】冷凍された対象物に電圧を印加するにあたり、交流電圧を昇圧する昇圧用変圧器の二次側の一方を絶縁処理するとともに他方を抵抗を介して対象物側に接続した解凍装置であって、印加電圧値を容易且つ安全に変更可能な解凍装置を提供することを課題とする。【解決手段】本発明は、冷凍された対象物Wに交流電圧を印加する電圧印加装置7を備え、電圧印加装置7には、電源12からの交流電圧を昇圧する昇圧用変圧器16が設けられ、昇圧用変圧器16の二次側の一方を絶縁処理するとともに他方を抵抗34を介して対象物W側に電気的に接続し、前記電圧印加装置7による上記対象物Wへの電圧印加によって対象物Wの解凍処理を行う解凍装置であって、対象物Wを収容する解凍室1を形成し、解凍室1の内壁2aを電気的に接地させ、変圧比を変更可能な調整用変圧器13を、電圧印加装置7における昇圧用変圧器16と電源12との間に配置し、調整用変圧器13の二次側に所定以上の大きさの電流が
