Water-cooled single welding machine module and water-cooled welding machine

The present invention relates to an inverter type water-cooled single welding machine module. In the development of a module welding machine containing a plurality of inverter welding machines embedded inside one case, as a part of measures to reduce size and lighten the weight of each individual welding machine, the present invention replaces the conventional air-cooled method using fans with a water-cooled method of which the cooling efficiency is excellent. Thus, it is possible to manufacture the individual welding machines to be smaller and lighter by drastically reducing the size of the individual welding machines (in the order of 1/3 to 1/5) due to effects of decreasing the number of heat dissipation components to be used and reducing the capacity and size thereof through enhancement of the efficiency of the heat dissipation components.