Pipeline machine and constant temperature control method thereof

The invention discloses a pipeline machine and a constant temperature control method thereof, and relates to the technical field of electric appliance application, the pipeline machine comprises a shell internally provided with a liquid pipeline and a heater, the liquid pipeline is divided into a water inlet pipe and a water outlet pipe which are connected to the inlet end and the outlet end of the heater, and a second temperature sensor is connected to the water outlet pipe in series; the water inlet pipe is connected with a first temperature sensor, a liquid sensor, a water pump and a flow meter in series, and the technical advantages are that the temperature of the second temperature sensor is collected, if the water outlet temperature is higher than the target temperature, the water nozzle temperature of the water outlet pipe is reduced through a PID algorithm; if the temperature of the water outlet nozzle is lower than the target temperature, the temperature of the water nozzle is increased through a PID