EBULLITION COOLING APPARATUS

PROBLEM TO BE SOLVED: To plan improvement of sealing work and reduce man-hours required for the sealing work by sealing each joint (sealing portion) of an outer case to make it unnecessary to seal a joint between an outer plate and a side wall plate and providing the outer case with a box-like structure having linear joints. SOLUTION: An outdoor side blower 8 requiring waterproofness is airtightly closed constructed by two pieces of outer plates 44, 45 directly fixed onto wall faces of a casing 5 to constitute an outer case having a box-like structure and sealing members applied onto joint portions of each of the outer plates 44, 45 and the wall faces of the casing 5 and the like. Side wall plates 48, 49 forming a scroll shaped air supply passage are sandwiched by the two outer plates 44, 45, and a protrusion provided on one side of each of the side wall plates 48, 49 is inserted into an engagement hole formed in one of the outer plates 44 and protrusions formed on other side of each of the side wall plates 48, 49 are bent at a right angle and are welded to the other outer plate 45. The other outer plate 45 is used as a side wall face forming an outer side heat transfer space 13 and has an air inlet opening 45a for introducing air from the outer heat transfer space 13.