REFRIGERATOR

PROBLEM TO BE SOLVED: To provide a refrigerator having higher energy saving performance by further reducing power consumption.SOLUTION: A refrigerator includes: an operation start determination unit for operating a compressor in predetermined temperature width based on preset temperature of a storage chamber; an operation stop determination unit for stopping the compressor; and a storage amount estimation unit which becomes an energy saving operation setting unit for switching a cooling operation by the compressor to an energy saving operation. The operation start determination unit and the operation stop determination unit are configured in such a manner that width between an operation start threshold value and an operation stop threshold value is made to be wider during the energy saving operation than during a normal operation (s152). Thereby, the number of on/off times of the compressor becomes fewer during the energy saving operation than during the normal operation, and the power consumption can be reduced as the number of on times of the compressor in which a large inrush current flows becomes fewer. Also, as the width of the threshold value between the operation start and stop of the preset temperature is widened, even when internal temperature variation becomes large, average temperature is the same as before, cooling total heat quantity is the same and good cooling capability can be secured. 【課題】消費電力の低減を進めて省エネ性を高めた冷蔵庫の提供。【解決手段】貯蔵室の設定温度に基づいて所定の温度幅で圧縮機を運転させる運転開始判定部及び同圧縮機を停止させる運転終了判定部と、前記圧縮機による冷却運転を省エネ運転に切り替える省エネ運転設定部となる収納量推定部とを備え、前記運転開始判定部及び運転停止判定部は運転開始閾値と運転停止閾値との幅を省エネ運転時には通常運転時よりも広くする（ｓ１５２）構成としたものである。これにより、省エネ運転時には圧縮機のオンオフ回数が通常運転時よりも少なくなり、大きな突入電流が流れる圧縮機のオン回数が少なくなる分消費電力を低減させることができる。また、設定温度の運転開始と停止の閾値の幅を広げているので庫内温度変動は大きくなるものの平均温度はこれまでと同じでその冷却総熱量は同等であり良好な冷却能力が確保できる。【選択図】図１２