Cooling device, water purifier having cooling device and manufacturing method therefor

A method comprising:

• foaming a water tank case insulator surrounding an outer circumferential surface of a water tank case configured to accommodate cooling water;
• disposing one or more structure for supplying cold water into the water tank case;
• disposing a sealing member at at least one position on a water tank cover configured to cover an upper portion of the water tank case;
• disposing a component corresponding to the at least one position of the water tank cover;
• disposing the water tank cover to cover an upper side of the water tank case;
• and
• integrally foaming an insulator to surround the water tank case and the water tank cover disposed on the upper side of the water tank case.

A water purifier, comprising:

• a filter unit to generate purified water by filtering raw water;
• and
• a cooling device to generate cold water by cooling the purified water generated by the filter unit, wherein the cooling device includes:
• a water tank case to accommodate cooling water therein,
• an evaporator at least partially accommodated in the water tank case to exchange heat with the cooling water accommodated in the water tank case,
• a water tank cover having at least one component disposed thereon and disposed above the water tank case,
• a water tank cover insulator and a water tank case insulator that are both made of a foamed material and together form an integral insulator without a seam between the water tank cover and the water tank case insulator, wherein the water tank case insulator surrounds an outer circumferential surface of the water tank case, and the water tank cover insulator surrounds an outer circumferential surface of the water tank cover, and
• a sealing member disposed to prevent a gap leading to the water tank case from being formed, around the at least one component disposed on the water tank cover.