PURPOSE: To cool a compressor with an air flow of a condenser side fan by laying out a condenser and an evaporator on the upper part of a main body and said compressor to the lower part respectively and installing an opening section to an upper partitioning board and a lower partitioning board of said main body to meet the condenser side fan and a cooling exhaust port near the compressor.

CONSTITUTION: An opening section 1 is formed in the central part of a sheet-shaped partitioning board 108 so as to communicate a spot between a compressor 107, a condenser side fan 102, and a condenser 104. A cooling exhaust port 2 is formed on an outer casing board of a main body 101 where the compressor 107 is positioned. Therefore, when driving the main body 101, there is generated an air flow marked with the broken line arrow. More specifically, when the condenser side fan is rotated, there are generated an air flow which penetrates an exhaust port 5 and an air flow which passes through the opening section 1 of the partitioning board 108 and transfers the heat generated by the compressor 107 to the cooling exhaust port 2, cooling the compressor 107. This construction makes it possible to inhibit a rise in the discharge power of the compressor 107 to the minimum no matter high temperature surrounds the compressor and thereby maintain a stabilized refrigeration cycle operation.