Parallel scroll compressor with internal low-pressure structure

The invention discloses an internal low-pressure structure parallel scroll compressor which comprises a shell, an upper cover is arranged at the upper end of the shell, a lower cover is arranged at the lower end of the shell, a closed inner cavity is defined by the shell, the upper cover and the lower cover, a scroll pump assembly is arranged at the upper position in the shell and comprises a movable scroll and a fixed scroll, and the movable scroll and the fixed scroll are arranged in a matched mode. The vortex pump assembly is provided with a vortex pump air suction port, an oil level adjusting pipe is arranged between the bottom of the closed inner cavity and the vortex pump air suction port, the lower end of the oil level adjusting pipe is arranged at the lubricating oil standard design oil level, and the upper end of the oil level adjusting pipe is close to the vortex pump air suction port. When the compressors are in a parallel connection state and lubricating oil in a certain compressor is too much, th