Automatic bean curd maker

An automatic bean curd maker, which is adapted for producing bean curd wherein the bean curd is made by soybeans and a coagulator, including:

• a grinding device, adapted for grinding the soybeans and for blending the soybeans and water in order to form bean dregs and raw bean pulp;
• a bean supplier, adapted for supply a predetermined amount of soybeans to the grinding device;
• a steamer, adapted for boiling the raw bean pulp made by the grinding device in order to form bean pulp;
• at least one stirring tank, including a first stirring device, the stirring tank being adapted for receiving and stirring the coagulator and the bean pulp made by the steamer in order to form soy custard, the stirring tank being formed with an opening on a bottom thereof, the opening being closed by a covering plate, the opening being opened when the covering plate is pushed upward;
• a bean pulp supplier, adapted for supplying the bean pulp made by the steamer to the stirring tank;
• a coagulator tank, adapted for receiving the coagulator, including a pump, a second stirring device, an output conduit, and an input conduit, the pump being adapted for pumping the coagulator in via the input conduit and for discharging the coagulator out via the output conduit, the second stirring device being adapted for stirring the coagulator received in the coagulator tank;
• a coagulator dosing device, including a coagulator dosing cylinder, a first valve, a second valve, a third valve, and a draining conduit, the first valve being disposed between the outlet conduit and the inlet conduit, the second valve being disposed between a bottom of the coagulator dosing cylinder and the outlet conduit, the third valve being disposed on the bottom of the coagulator dosing cylinder so as to alternatively allow the coagulator in the coagulator dosing to be discharged into the stirring tank, an end of the draining conduit being connected to a portion of the coagulator dosing cylinder which is located at a predetermined height from the bottom of the coagulator dosing cylinder, an opposite end of the draining conduit being connected to the inlet conduit;
• a molding device, being located below the stirring tank and being liftable, the molding device including a molding container which is able to push the covering plate in order to open the opening when lifted so as to allow the soy custard to fall into the molding container, the soy custard being molded in the molding container;
• a pressing device, adapted for pressing the soy custard in the molding container for extracting water in order to form bean curd;
• wherein a system composed of the first valve, the second valve, and the third valve is switchable between a first mode and a second mode,
• wherein when the system is at the first mode, the first valve is opened, and the second valve and the third valve are both closed, the coagulator enters the coagulator dosing cylinder from the outlet conduit via the first valve, and excess coagulator flows back into the inlet conduit via the draining conduit;
• and
• wherein when the system is at the second mode, the first valve is closed, and the second valve and the third valve are both opened, coagulator from the coagulator tank flows to the inlet conduit from the outlet conduit via the second valve, and the coagulator accumulated in the coagulator dosing cylinder is discharged into the stirring tank via the third valve.