| 摘要 |
The present invention relates to an ice making machine capable of making direct contact between a refrigerant and the inner surface of a drum while having a large contact area in order to solve a problem about a heat loss caused by a small area, coming in contact with the thickness of a refrigerant tube, when the refrigerant tube is wound on the inner surface of the drum to cool the drum. The ice making device comprises: an ice making drum having a cylindrical shape to make a refrigerant flow inside; multiple liquid spray nozzles spraying liquid while rotating at a distance from the outer surface of the ice making drum; an ice making cutter cutting the outer surface of ice, made near the outer surface of the drum, through a vertically elongated blade; and a heat exchange drum having an outer diameter inserted into the inner diameter of the ice making drum to correspond each other, including a pair of first and second spiral grooves extended on the outer surface while forming a spiral line along the outer surface, a connection groove dented to be connected with the first and second grooves, and a combination hole filled with an insulator therein, of which lower and upper inner diameters are reduced to be stepped, and of which screw thread is formed on the inner surface. Opened upper and lower surfaces of the ice making drum include upper and lower covers formed into a disc shape and including a combination protrusion, protruding from the center of the upper and lower surfaces and of which screw thread is formed on the outer surface, to be combined with the combination hole of the heat exchange drum. The lower cover includes: a refrigerant inflow pipe connected to the first spiral groove to receive the refrigerant; and a refrigerant discharge pipe connected to the second spiral groove to discharge the refrigerant. |
