To improve the radiation performance of a radiation plate by connecting a small case having a relay terminal board for connecting a power control device having a radiation plate of fin structure to the terminal board of a compressor to the compressor having one terminal position in two-point support or more.
A compressor 1 has a compressor terminal board 2. A power control device 3 and a relay terminal board 4 are stored in a small case 5, and the power control device 3 is directly connected to the compressor terminal board 2 through the relay terminal board 4. Such a connection allows the interruption of the thermal influence from the compressor 1 raised to a high temperature during operation to the power control device 3. A radiation plate of fin structure is arranged so that heat is easily radiated to improve the radiation performance to the heat of a transistor of the power control device 3. Further, when the arrangement of fins is optimized in order to effectively use the wind of a cooling fan for cooling the compressor 1, and a reflection plate is provided, the wind direction can be forcedly changed to further improve the radiation performance of the radiation plate.
HAMAOKA KOJI
NAKANO TOMONORI
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