The invention discloses a box-type pressure-superposed variable-frequency energy-saving water supplying
system. The energy-saving water supplying
system comprises a water inlet
pipe, a water tank, a flow stabilizing tank, a
booster pump, pressurizing pumps, an air pressure tank and a water outlet header
pipe. The water inlet end of the water inlet
pipe is connected with the water outlet end of a municipal pipe. The water outlet end of the water inlet pipe is connected with the water inlet end of the water tank and the water inlet end of the flow stabilizing tank. The water inlet end of the
booster pump is connected with the water outlet end of the water tank, and the water outlet end of the
booster pump is connected with the water outlet end of the flow stabilizing tank. The pressurizing pumps include the first main pump, the second main pump and the auxiliary pump, wherein the first main pump, the second main pump and the auxiliary pump are connected between the flow stabilizing tank and the water outlet heater pipe in parallel. The air outlet end of the air pressure tank is connected with the air inlet end of the water outlet header pipe through a first
butterfly valve. By means of the energy-saving water supplying
system, the pressure
potential energy of a municipal
water source can be sufficiently used, and relaying boosting water supplying can be achieved; when the municipal
water pressure and the municipal water amount can not meet the requirements of users, a water supplying mode is automatically switched into a water tank water supplying mode, and twenty-four-hour continuous constant-pressure water supplying to the users can be achieved.