VEHICULAR HEAT MANAGEMENT SYSTEM

To appropriately perform on-vehicle battery cooling and cabin interior air-conditioning and effectively cool an on-vehicle electrical component by cooling cooling water while cooling inside of a cabin even at a high temperature.SOLUTION: A vehicular heat management system includes: a first refrigerant circuit 1 used for cabin interior air-conditioning and having an inside air cooler 16 for exchanging heat between a first refrigerant and indoor air; a cooling water circuit 2 having a radiator 22 and cooling an electrical component 21 by using cooling water; a second refrigerant circuit 3 used for battery temperature control and having a second refrigerant/outside air heat exchanger 32 for exchanging heat between a second refrigerant and outside air; a first refrigerant/cooling water heat exchanger 4; and a second refrigerant/cooling water heat exchanger 5. In a cabin interior-cooling cooling water cooling mode of cooling inside of the cabin and cooling the cooling water, the first refrigerant in the first refrigerant circuit 1 absorbs heat from indoor air in the inside air cooler 16, the cooling water in the cooling water circuit 2 releases heat to outside air in the radiator 22, and the second refrigerant in the second refrigerant circuit 3 releases heat to outside air in the second refrigerant/outside air heat exchanger 32 and absorbs heat from the cooling water in the cooling water circuit 2 in the second refrigerant/cooling water heat exchanger 5.SELECTED DRAWING: Figure 2 【課題】車載電池冷却と車室内空調を適切に行い、高温時でも車室内を冷房しつつ冷却水を冷却して車載電気部品を適切に冷却する。【解決手段】第１冷媒と室内空気とが熱交換する内気冷却器１６を有し、車室内空調用の第１冷媒回路１と、ラジエータ２２を有し、冷却水で電気部品２１を冷却する冷却水回路２と、第２冷媒と外気とが熱交換する第２冷媒／外気熱交換器３２を有し、電池温調用の第２冷媒回路３と、第１冷媒／冷却水熱交換器４と、第２冷媒／冷却水熱交換器５とを備える。車室内を冷房するとともに冷却水を冷却する車室内冷房冷却水冷却モードにおいて、第１冷媒回路１の第１冷媒が内気冷却器１６にて室内空気から吸熱し、冷却水回路２の冷却水がラジエータ２２にて外気に放熱し、第２冷媒回路３の第２冷媒が第２冷媒／外気熱交換器３２にて外気に放熱するとともに第２冷媒／冷却水熱交換器５にて冷却水回路２の冷却水から吸熱する。【選択図】図２