HEAT EXCHANGER FOR CONSTRUCTION MACHINE

摘要

PROBLEM TO BE SOLVED: To obtain a small and compact heat exchanger by cooling different media to be cooled composed of engine cooling water and working oil down to a substantially same temperature. SOLUTION: An oil cooler tank 22 and a radiator tank 23 are disposed above the body frame 21 of a heat exchanger 20 in order to supply cooling air from a cooling fan coupled with an engine to a heat radiating section 26 in the body frame 21. In order to feed a working oil from the oil cooler tank 22 toward a flow-out section 24 and to supply engine cooling water from the radiator tank 23 toward a flow-out section 25, a large number of thin oil conduction tubes 29a and water conduction tubes 29b are provided vertically in the heat radiating section 26. The large number of thin tubes 29a, 29b are coupled with heat radiation fins 30 and both media are cooled down to a substantially same temperature.