| 摘要 |
PURPOSE:To reduce noises generated from a cooling unit for a refrigerator truck as much as possible by sealing the side face of a unit case except the suction port of cooling air and the exhaust port of cooling air and interior- finishing a sirroco face for sucking cooling air into the unit case. CONSTITUTION:The side face of a unit case 3 except a cooling-air suction port 3d and cooling-air exhaust ports 3a, 3c is sealed, and s sirroco fan for sucking cooling air is interior-finished into the unit case. Consequently, even when static pressure is high, a sufficient quantity of air can be pushed in by the sirroco fan. Accordingly, the width of the cooling-air suction port 3d and cooling-air exhaust ports 3c, 3a of the unit case 3 can be reduced, and a noise level can be lowered to approximately 10dB. |
