Patent ID: 11897309
Assignee: SUBARU CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 6:
7. A vehicle heat management system comprising:
a refrigerant circuit configured to circulate a refrigerant to regulate a temperature inside a passenger compartment of a vehicle therethrough;
a first circuit configured to circulate a liquid and including a radiator;
a first pump provided in the first circuit;
a first heat exchanger provided, in the first circuit, downstream the first pump and upstream the radiator and configured to exchange heat between the liquid and a first piece of equipment for driving the vehicle;
a second circuit configured to circulate the liquid;
a second pump provided in the second circuit;
a second heat exchanger provided in the second circuit and configured to exchange heat between the liquid and the refrigerant;
a third heat exchanger provided in the second circuit and configured to exchange heat between the liquid and a battery;
a control valve provided, in the second circuit, downstream of the third heat exchanger and upstream of the second heat exchanger;
a first three-way valve communicated to a first channel, a second channel and a third channel, the first channel branching from the first circuit at a point downstream of the first pump in the first circuit and upstream of the first heat exchanger in the first circuit, the second channel branching from the second circuit at a point downstream of the third heat exchanger in the second circuit and upstream of the control valve in the second circuit;
a second three-way valve communicated to the third channel, a fourth channel and a fifth channel, the fourth channel branching from the second circuit at a point downstream of the second heat exchanger in the second circuit and upstream of the third heat exchanger in the second circuit;
a third three-way valve communicated to the fifth channel, a sixth channel and a seventh channel, the sixth channel branching from the second circuit at a point downstream of the control valve in the second circuit and upstream of the second heat exchanger in the second circuit, the seventh channel branching from the first circuit at a point downstream of the first heat exchanger in the first circuit and upstream the first pump in the first circuit;
a fourth heat exchanger provided in the third channel and configured to exchange heat between the liquid and a second piece of equipment for driving the vehicle; and
a third pump provided in the fourth channel, wherein
in a first mode,
i) the control valve is opened,
ii) the first three-way valve is switched to a state in which the first three-way valve (1) communicates the second and third channels, and (2) closes off the first channel from the second and third channels,
iii) the second three-way valve is switched to a state in which the second three-way valve (1) communicates the third and fourth channels and (2) closes off the fifth channel from the third and fourth channels,
iv) the third three-way valve is switched to a state in which the third three-way valve (1) communicates the fifth and sixth channels, and (2) closes off the seventh channel from the fifth and sixth channels,
v) the second pump is activated, and
vi) the third pump is activated to transfer the liquid in the fourth channel toward the second three-way valve, and

in a second mode,
i) the control valve is closed,
ii) the first three-way valve is switched to the state in which the first three-way valve (1) communicates the second and third channels, and (2) closes off the first channel from the second and third channels,
iii) the second three-way valve is switched to a state in which the second three-way valve (1) communicates the third and fifth channels and (2) closes off the fourth channel from the third and fifth channels,
iv) the third three-way valve is switched to the state in which the third three-way valve (1) communicates the fifth and sixth channels, and (2) closes off the seventh channel from the fifth and sixth channels,
v) the second pump is activated, and
vi) the third pump is deactivated.