| 摘要 |
PROBLEM TO BE SOLVED: To detect the oil level of lubrication oil stored in the oil reservoir of a compressor with high accuracy and with a simple arrangement structure.SOLUTION: A compressor (20) includes: a casing (21); a compression mechanism (24) arranged in this casing (21); and an oil reservoir (27) formed on a bottom of this casing (21). An oil filler port (49) for supplying lubrication oil stored in the oil reservoir (27) to an expander (30) is provided in this oil reservoir (27). A first capacitance sensor (70) for expander protection is installed upward of the oil filler port (49), and a second capacitance sensor (71) for compressor protection is installed downward of the oil filler port (49). The first capacitance sensor (70) is substantially equal to the second capacitance sensor (71) in a form structure. A distance between the first capacitance sensor (70) and a bottom surface (24a) of the compression mechanism (24) is substantially equal to that between the second capacitance sensor (71) and a bottom surface (27a) of the oil reservoir (27). |
