REFRIGERATION DEVICE

To ensure abnormal-state operation corresponding to poor lubrication of a sliding bearing supporting a driving shaft of a compressor.SOLUTION: A bearing monitoring part (23) is provided for a compressor unit (40) including a compressor (50). The bearing monitoring part (23) is constructed to perform abnormal-state operation corresponding to poor lubrication of the sliding bearing of the compressor (50) when abnormality conditions are established. The abnormality conditions are the ones showing that a current change rate as a variation per unit time of a driving current (that is, a measurement value of a current detector) for driving the compressor (50) exceeds a first reference value. A driving shaft of the compressor (50) has a journal part which is supported by the sliding bearing and whose surface roughness Ra is equal to or greater than 0.05 μm.SELECTED DRAWING: Figure 2 【課題】圧縮機の駆動軸を支持する滑り軸受の潤滑不良に対応した異常時動作を確実に行う。【解決手段】圧縮機（50）を備えた圧縮機ユニット（40）に軸受監視部（23）を設ける。軸受監視部（23）は、異常条件が成立すると、圧縮機（50）の滑り軸受の潤滑不良に対応した異常時動作を行うように構成される。異常条件は、圧縮機（50）を駆動するための駆動電流（即ち、電流検知器()の計測値）の単位時間当たりの変化量である電流変化率が第１基準値を超えたことを示す条件である。また、圧縮機（50）の駆動軸は、滑り軸受に支持されるジャーナル部の表面粗さＲａが０.０５μｍ以上である。【選択図】図２