| 摘要 |
PROBLEM TO BE SOLVED: To easily install various kinds of lines for connection to an air- conditioning unit and to enhance productivity, etc., during assembly of the air-conditioning unit. SOLUTION: An air-conditioning unit 44 comprising a condenser, a heater core, and the like is provided on the side of a cab box 25 facing a ceiling part 26. A refrigerant inflow line 55 and a refrigerant outflow line 56 which are connected to the condenser of the air conditioning unit 44 are placed in respective horizontal right positions at the right and left of a rear face part 28 in such a way as to be directed upward and downward, respectively. The refrigerant inflow line 55 and the refrigerant outflow line 56 are connected, respectively, to the refrigerant inflow port and the refrigerant outflow port of a refrigerant compressor. A cooling water inflow line 59 and a cooling water outflow line 62 which are connected to the heater core are placed in respective horizontal left positions at the right and left of the rear face part 28 in such a way as to be directed upward and downward, respectively. The cooling water inflow line 59 and the cooling water outflow line 62 are connected, respectively, to the cooling water inflow port and the cooling water outflow port of an engine. |
