Water-jet pump with overflow pipe

The utility model discloses a water-jet pump with an overflow pipe. The water-jet pump with the overflow pipe comprises a water-jet pool, the water-jet pump is connected with the water-jet pool through a pipeline and connected with an air extractor through a pipeline, the air extractor is respectively connected to a condenser and the water-jet pool through pipelines, the overflow pipe is connected on the pipeline between the air extractor and the water-jet pool, and a temperature control valve is arranged on the overflow pipe. The problem that in the prior art, due to the fact that water temperature is too high, the vacuum degree of the condenser is reduced, and thus working efficiency of the water-jet pump is reduced is solved. Unit efficiency is made to increase obviously, the vacuum degree of the condenser is improved to -0.083MPa from previous -0.080MPa, unit loads are improved to 12000KW from previous 10000KW, and extra 1200 ten thousands KW electricity is generated accumulatively when a unit runs for 60