| 摘要 |
PURPOSE:To thaw foodstuff in a short time and insulate the heat in automatic mode after the completion of thawing operation by heating based on the radiation of a far infrared heater by way of the top, sides, and a reflecting plate, heating based on the heat transfer from a heater on the bottom, and simultaneously supplying cool air by way of a damper thermostat, and reducing the amount of radiation and heat transfer of each heater. CONSTITUTION:Radiation heating from a far infrared heater 34 is equally carried out from the top coupled with a reflecting action of a reflecting plate 39. From the bottom, heating is carried out based on the heat transfer of a heater 42. A damper is forcibly opened and the cool air forcibly circulated by a fan is discharged downward from a ventilation port of the reflecting plate 39 so that the surface of foodstuff 45 may be cooled equally. When defrosting a cooler, the power supply rate to the heaters 34 and 42 is lowered than usual and then the power is supplied. After the completion of thawing operation, temperature control is carried out based on a detected temperature of a temperature detection means 31 so that the foodstuff may be cooled and stabilized in a perishable temperature zone of about -3 deg.C. This construction makes it possible to thaw the foodstuff with minimum temperature variation in a short time and maintain the foodstuff at a temperature suitable to perishables. |
