PROBLEM TO BE SOLVED: To provide a work machine having a function of effectively cooling a heating element, without greatly increasing costs and expanding a facility.SOLUTION: A work machine includes: heating elements 37, 38; an engine 22; an exhaust emission control device 30 configured to supply urea water to exhaust gas from the engine 22 to purify the exhaust gas; a urea water circulation path 40 configured to circulate urea water so as to derive part of urea water from the exhaust gas emission control device 30 to perform heat exchange between the urea water and the heating elements 37, 38 and return urea water after heat exchange to the exhaust emission control device 30; a urea water circulation pump 34 configured to circulate urea water along the urea water circulation path 40; and a urea water cooling unit 42 configured to cool urea water after heat exchange between itself and the heating elements 37, 38.SELECTED DRAWING: Figure 3
【課題】著しいコストの増大及び設備の肥大化を伴うことなく発熱要素を有効に冷却する機能を有する作業機械を提供する。【解決手段】作業機械は、発熱要素37,38と、エンジン22と、エンジン22の排ガスに尿素水を供給することにより当該排ガスを浄化処理する排ガス浄化装置30と、排ガス浄化装置30から尿素水の一部を導出して発熱要素37,38との間で熱交換を行わせかつその熱交換後の尿素水を排ガス浄化装置30に戻すように尿素水を循環させるための尿素水循環路40と、尿素水循環路40に沿って尿素水を循環させる尿素水循環ポンプ34と、発熱要素37,38と熱交換した尿素水を冷却する尿素水冷却部42と、を備える。【選択図】図3
WORK MACHINE HAVING COOLING FUNCTION
冷却機能を有する作業機械
2017-08-17
Patent
Electronic Resource
Japanese
IPC: | F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B01D SEPARATION , Trennen |
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