公开(公告)号：EP3789614A1

公开(公告)日：2021-03-10

申请号：EP19822074.1

申请日：2019-06-06

申请人： DAIKIN INDUSTRIES, LTD.

发明人： FURUGAKI, Takashi ,  TANAKA, Masaru

IPC分类号： F04B49/10

摘要： A refrigeration apparatus (10) includes a bearing monitor (23). If an abnormal state condition is satisfied, the bearing monitor (23) performs an abnormal-state operation for coping with poor lubrication on a plain bearing of a compressor (50). The abnormal state condition is a condition indicating that a rate of change of current exceeds a first reference value. The rate of change of current is an amount of change in a driving current for driving the compressor (50) (i.e., a value measured by a current sensor) per unit time. A drive shaft of the compressor (50) has a journal portion supported by the plain bearing and having a surface roughness Ra greater than or equal to 0.05 µm.