Patent ID: 8192544

Claim:
An apparatus configured to manufacture a polycrystalline silicon ingot for solar batteries comprising a door control device using a hinge, the apparatus comprising: a vacuum chamber; a crucible in the vacuum chamber, wherein the crucible has a predetermined shape; a susceptor surrounding the crucible to protect the crucible; a support under the susceptor configured to support the susceptor; a heater configured to heat the crucible to melt a raw silicon material in the crucible; an insulation plate below the susceptor spaced apart by a predetermined distance from the susceptor, wherein the insulation plate comprises an opening; a cooling plate having a diameter corresponding to a diameter of the opening of the insulation plate, wherein the cooling plate is configured to move upwards through the opening of the insulation plate and come into close contact with or approaching a lower end of the susceptor to cool a lower end of the crucible; a cooling plate support shaft under the cooling plate to support the cooling plate; a cooling plate moving unit configured to actuate the cooling plate and the cooling plate support shaft; an inert gas supply and discharge unit configured to supply inert gas into the vacuum chamber or discharge the inert gas outside of the vacuum chamber; a temperature sensor configured to measure a temperature of the crucible; and a control unit configured to control the temperature in the crucible using an output value transmitted from the temperature sensor such that the raw silicon material is evenly melted and grown in the crucible, wherein: the control unit controls the inert gas supply and discharge unit such that a constant amount of inert gas is maintained in the vacuum chamber, the control unit is configured to control the cooling plate moving unit such that the cooling plate approaches or comes into contact with the lower end of the susceptor through the opening of the insulation plate, insulation plate comprises a door configured to open or close the opening of the insulation plate, the door comprises the hinge between the door and the insulation plate, the door is opened or closed by the hinge, such that after the raw silicon material is melted, the cooling plate moves upwards to cool the crucible and pushes a lower surface of the door upwards, the door is opened by the hinge in a swinging manner, and when the cooling plate approaches or comes into contact with the lower end of the susceptor, one end of the opened door leans on a corresponding surface of the cooling plate.