Oil level pipe and liquid level pipe apparatus of small-sized refrigerant compressor unit

The utility model relates to an oil level pipe and liquid level pipe device which is used in small-sized refrigeration compressor groups such as refrigerating rooms, refrigerating devices and the like. The device comprises an oil level pipe (1) and a liquid level pipe (4), wherein an upper valve I (2) which is communicated with a return-air duct (8) of a refrigeration compressor group (7) is arranged on the upper end of the oil level pipe (1), a lower valve I (3) which is communicated with the bottom of a gasoline tank of the refrigeration compressor group (7) is arranged on the lower end, an upper valve II (5) which is communicated with a liquid collecting pipe (10) of a condenser of the refrigeration compressor group (7) is arranged on the upper end of the liquid level pipe (4), and a lower valve II (6) which is communicated with the lower portion of a liquid receiver (11) of the condenser (9) of the refrigeration compressor group (7) is arranged on the lower end. The changing condition of the oil level, th