| 摘要 |
<p>PROBLEM TO BE SOLVED: To reliably restrain a refrigerant concentration in lubricating oil so that a compressor is sufficiently lubricated.SOLUTION: A refrigerating device comprises: an emergency oil return passage (88) that returns lubricating oil stored in an oil separator (80) to a compressor (10); a refrigerant concentration sensor (19) that outputs a signal corresponding to a refrigerant concentration in the lubricating oil in an oil reservoir (18) of the compressor (10); an opening/closing valve (89) provided in the emergency oil return passage (88); and a controller (6). The oil separator (80) comprises an emergency oil outlet port (82) formed below a normal oil outlet port (81) and connected to the emergency oil return passage (88). The controller (6) performs control so that the opening/closing valve (89) is opened when the output signal of the refrigerant concentration sensor (19) indicates that the refrigerant concentration in the lubricating oil is larger than a predetermined value.</p> |
