Cavitation-free low-noise condenser vacuumizing energy-saving device

The invention discloses a cavitation-free low-noise condenser vacuumizing energy-saving device. The device comprises an air sucking pipeline, a manual valve, a pneumatic butterfly valve, a variable-frequency high-pressure-difference dry type lobe pump, an automatic-adjustment spraying device, a first condenser, a vacuum breaking device, a variable-frequency cone two-stage pump, a separator, a second condenser, a constant-pressure variable-frequency control device, a silencing machine box and a check valve. The air amount inside the condensers changes irregularly, the pumping speed and compression ratio can be automatically adjusted when environment temperature is increased, a system is prevented from tripping and being shut down or a standby pump is prevented from being started, system reliability is improved, energy consumption is lowered, cavitation and accidental shutdown water return are prevented, a scaling problem is solved, and noise pollution is effectively reduced.