| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cold air circulation type showcase capable of preventing inflow of high-humidity air to the inside of case in switching from a defrosting operation to a cooling operation, and preventing frost formation on commodities.SOLUTION: An evaporator 7 communicated with a refrigerating machine 10 by a refrigerant pipe conduit, and an internal circulation fan 9 are disposed in a cold air circulation passage 6 formed between an outer case 2 and an inner case 4 of a case body. In a cooling operation, the refrigerating machine 10 and the internal circulation fan 9 are operated to circulate and distribute cold air cooled by the evaporator 7 from the cold air circulation passage 6 to the inside of case 5. The operations of the refrigerating machine 10 and the internal circulation fan 9 are stopped, and a defrosting heater 8 disposed in the evaporator 7 is energized in starting the defrosting operation of the evaporator 7. The operation of the refrigerating machine 10 is started, and energization to the defrosting heater 8 is stopped in terminating the defrosting operation, and after the lapse of a prescribed time therefrom, the internal circulation fan 9 is operated to circulate and distribute the cold air cooled by the evaporator 7 from the cold air circulation passage 6 to the inside of case 5 to cool the inside of case 5.</p> |
