WORKING MACHINE AND COOLING CONTROL METHOD FOR WORKING MACHINE

• Main Authors: SUGAWARA TATSUYA, OZAKA TADASHI, KONO RYUJI, FUKUDA NAOKI, IKARI TAKANOBU, ARAI MASATSUGU, TANAKA TAKATERU
• Format: Patent
• Language: English; Japanese
• Published: 22.03.2018
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; STEAM ENGINES; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a working machine allowing for reduction in fan power and thereby allowing for sufficient suppression of fuel consumption, and a cooling control method for the working machine.SOLUTION: The working machine comprises: fans 52A-52D generating cooling air; a plurality of first heat exchangers 53A, 53B performing heat exchange between a first refrigerant passed through a prescribed first portion in an engine 32, and the cooling air; a plurality of second heat exchangers 54A, 54B performing heat exchange between a second refrigerant passed through a prescribed second portion in the engine 32, and the cooling air; a fan driving part 711 driving the fans 52A-52D; and an opening/closing control part 712 controlling each of opening and closing movements of a plurality of first on-off valves 61A, 61B and a plurality of second on-off valves 63A, 63B so that at least one of the first refrigerant and the second refrigerant is passed through only a region where the fans 52A-52D are driven by the fan driving part 711 and the air flow of the cooling air is generated.SELECTED DRAWING: Figure 5 【課題】ファン動力を低減し、燃料消費量を十分に抑制することができる作業機械及び作業機械の冷却制御方法の提供。【解決手段】本発明は、冷却風を生起するファン５２Ａ〜５２Ｄと、エンジン３２内の所定の第１部位を流通した第１冷媒と冷却風との熱交換を行う複数の第１熱交換器５３Ａ，５３Ｂと、エンジン３２内の所定の第２部位を流通した第２冷媒と冷却風との熱交換を行う複数の第２熱交換器５４Ａ，５４Ｂと、ファン５２Ａ〜５２Ｄを駆動するファン駆動部７１１と、ファン駆動部７１１によってファン５２Ａ〜５２Ｄが駆動して冷却風の気流が発生した領域のみを第１冷媒及び第２冷媒の少なくとも一方が通過するように、複数の第１開閉弁６１Ａ，６１Ｂ及び複数の第２開閉弁６３Ａ，６３Ｂの開閉動作をそれぞれ制御する開閉制御部７１２とを備えた。【選択図】図５