US Patent 9604324 Refrigerator and manufacturing method thereof

A method of manufacturing a refrigerator comprises preparing an inner case including an ice making chamber and an opening; preparing an outer case to be coupled to an outside of the inner case; preparing a refrigerant pipe assembly including a refrigerant pipe having at least a portion to be disposed in the ice making chamber to supply cooling energy, and a refrigerant pipe insulator to insulate the refrigerant pipe; inserting the refrigerant pipe assembly into the opening of the inner case in an inward direction from the outside of the inner case such that a portion of the refrigerant pipe insulator is disposed in the ice making chamber, and a remaining portion of the refrigerant pipe insulator is disposed between the inner case and the outer case; and foaming a body insulator between the inner case and the outer case, thereby supporting the refrigerant pipe insulator by the body insulator.