A liquid outlet structure comprising: a sealing valve, a spray pipe and a nozzle provided at an end portion of the spray pipe; the sealing valve comprises a sealing valve body provided with a cylindrical valve hole; wherein a bottom end of the cylindrical valve hole is provided with a frustum hole that is arranged coaxially with the cylindrical valve hole, and a first end of the frustum hole is in communication with the bottom end of the cylindrical valve hole; the spray pipe comprises a spray pipe body, a spray hole formed in an axial direction of the spray pipe body, and a magnet bar provided in the spray hole; a plurality of blocking strips extending axially along the spray hole are uniformly arranged on an inner wall of the spray hole, and one end of each of the plurality of blocking strips is provided with a shoulder close to a first end of the spray pipe body that extends towards a center of the spray hole; and the magnet bar is movable along an axial direction of the spray hole in a space defined by a plurality of shoulders and the plurality of blocking strips, the magnet bar is configured to touch pressure the sealing valve to block the nozzle at a second end of the spray pipe body where no shoulder is provided; the nozzle comprises an annular sleeve, an end plate provided at one end of the annular sleeve, a nozzle pipe provided at a center of the end plate, and a conical nozzle opening provided at an end portion of the nozzle pipe such to prevent liquid from adhering to a lower end of the nozzle; an annular blocking flange surrounding a periphery of the nozzle pipe is further provided at the end plate; a liquid channel communicable with an interior of the annular sleeve is formed in the nozzle pipe and the conical nozzle opening; and an annular groove is defined between the nozzle pipe and the annular blocking flange; and the annular sleeve is in threaded connection or clamped connection with the spray pipe body; and the sealing valve is provided in the annular sleeve. the sealing valve comprises a sealing valve body provided with a cylindrical valve hole; wherein a bottom end of the cylindrical valve hole is provided with a frustum hole that is arranged coaxially with the cylindrical valve hole, and a first end of the frustum hole is in communication with the bottom end of the cylindrical valve hole; the spray pipe comprises a spray pipe body, a spray hole formed in an axial direction of the spray pipe body, and a magnet bar provided in the spray hole; a plurality of blocking strips extending axially along the spray hole are uniformly arranged on an inner wall of the spray hole, and one end of each of the plurality of blocking strips is provided with a shoulder close to a first end of the spray pipe body that extends towards a center of the spray hole; and the magnet bar is movable along an axial direction of the spray hole in a space defined by a plurality of shoulders and the plurality of blocking strips, the magnet bar is configured to touch pressure the sealing valve to block the nozzle at a second end of the spray pipe body where no shoulder is provided; the nozzle comprises an annular sleeve, an end plate provided at one end of the annular sleeve, a nozzle pipe provided at a center of the end plate, and a conical nozzle opening provided at an end portion of the nozzle pipe such to prevent liquid from adhering to a lower end of the nozzle; an annular blocking flange surrounding a periphery of the nozzle pipe is further provided at the end plate; a liquid channel communicable with an interior of the annular sleeve is formed in the nozzle pipe and the conical nozzle opening; and an annular groove is defined between the nozzle pipe and the annular blocking flange; and the annular sleeve is in threaded connection or clamped connection with the spray pipe body; and the sealing valve is provided in the annular sleeve.