Thermoelectric cooling device and cold water generator having same

A cold water generator, comprising:

• a thermoelectric cooling device;
• and
• a tank body having a space for accommodating water therein, and cooling the water accommodated therein by a cooling side of a thermoelectric module, the thermoelectric cooling device comprising:
• the thermoelectric module performing cooling by applying electricity;
• a heat sink having a body having a contact surface in contact with a heat generating side on one side, and a plurality of heat dissipation fins formed on the other side of the body, and emitting heat transferred from the heat generating side of the thermoelectric module;
• a heat pipe coupled to a mounting groove formed on the contact surface of the heat sink and performing heat transfer through a working fluid accommodated therein;
• and
• a cooling fan forming an air flow to the heat sink,
• wherein the heat pipe includes two corner-extension heat pipes having a shape extending from a central part of the heat sink in which the thermoelectric module is installed to a corner area of the heat sink,
• wherein the mounting groove has a shape corresponding to a shape of the corner-extension heat pipe,
• wherein in the heat pipe, a part exposed externally of the heat sink while being coupled to the mounting groove has the same level as a level of the contact surface,
• wherein each of the two corner-extension heat pipes extends from both sides of the central part such that respective ends of each of the corner-extension heat pipes reaches two corner areas of the heat sink,
• wherein one of the two corner-extension heat pipes has both ends respectively positioned at the two corner areas, and the other corner-extension heat pipe has both ends respectively positioned at the other two corner areas, and
• wherein the heat pipe further includes a central heat pipe disposed between the two corner-extension heat pipes.