| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a vehicular cooling system capable of compatibly ensuring the warming-up performance and enhancing the air-conditioning performance. <P>SOLUTION: The vehicular cooling system 1 includes a first cooling water circuit 2 in which cooling water to cool an engine 40 is circulated, a second cooling water circuit 20 in which low-temperature cooling water colder than the cooling water in the first cooling water circuit 2 is circulated, and a refrigerating cycle 30 for executing the air-conditioning in a cabin by controlling the state of a circulating refrigerant. Further, the system has a water-refrigerant heat exchanger 32 having a refrigerant heat exchange flow passage 32a in a part of a high-pressure side passage in the refrigerating cycle 30 and a water heat exchange flow passage 32b in which the cooling water to be heat-exchanged with the refrigerant distributing in the refrigerant heat exchange flow passage 32a, and a changeover valve 9 for changing the circuit connected to the water heat exchange flow passage 32b so as to allow either the cooling water in the first cooling water circuit 2 or the low-temperature cooling water in the second cooling water circuit 20 to flow into the water heat exchange flow passage 32b. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
