Flash tank system of steam heat pump

The invention discloses a flash tank system of a steam heat pump machine, which belongs to the field of heat pump flash equipment, and comprises a sleeve, a movable insertion pipe and a buckle, a movable insertion pipe is inserted into a top port of the sleeve in a matched mode, a buckle is fixed to a bottom port of the movable insertion pipe, the space in the sleeve and the movable insertion pipe is in a low-pressure state through release of the first flow guide hole and the second flow guide hole, high-pressure saturated water vapor enters the space in the sleeve and the movable insertion pipe to be evaporated instantly, and the water vapor is evaporated instantly through rotation of the rotating disc. Continuous operation can be achieved, the pressure difference between input high-pressure saturated water vapor and the interior of the sleeve can be guaranteed, the evaporation efficiency can be improved, the better flash evaporation effect can be achieved, continuous operation can be achieved, meanwhile, ac