US 11,897,309 B2Granted

Vehicle heat management system

AssigneeSubaru Corporation

InventorsYasushi Takagi, Yoshiyuki Jin

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Abstract

A vehicle heat management system includes a refrigerant circuit, a battery temperature regulation circuit, and an electric part cooling circuit. The refrigerant circuit circulates a refrigerant to regulate a temperature inside a passenger compartment through the refrigerant circuit. The battery temperature regulation circuit regulates a temperature of a battery by introducing a liquid that exchanges heat with the refrigerant to the battery. The electric part cooling circuit circulates a liquid cooled by a radiator circulates through the electric part cooling circuit, and is capable of cooling a first and second pieces for driving a vehicle. In a first mode, the liquid cooled by the radiator cools the first piece of equipment, the refrigerant of the refrigerant circuit cools the second piece of equipment, and the liquid which has exchanged heat with the refrigerant is introduced in parallel to the battery and the second piece of equipment.

Claims7

Dependent claims

A vehicle heat management system comprising:

a refrigerant circuit configured to circulate a refrigerant to regulate a temperature inside a passenger compartment therethrough;
a battery temperature regulation circuit configured to regulate a temperature of a battery by introducing a liquid that exchanges heat with the refrigerant to the battery, the battery temperature regulation circuit comprising a first control valve on a downstream side of the battery and a heat exchanger on a downstream side of the first control valve and configured to exchange heat with the refrigerant;
an electric part cooling circuit configured to circulate a liquid cooled by a radiator therethrough, the electric part cooling circuit being capable of cooling a first piece of equipment and a second piece of equipment for driving a vehicle;
and
a first bypass channel configured to introduce the liquid of the battery temperature regulation circuit to the second piece of equipment, wherein
in a first mode, the liquid cooled by the radiator cools the first piece of equipment, the liquid which has exchanged heat with the refrigerant is introduced in parallel to the battery and the second piece of equipment, and the first control valve is open such that the liquid which has flowed out from the battery and the second piece of equipment flows through the first control valve, and
in a second mode, the first control valve is closed such that the liquid does not flow through the first control valve, and the liquid which has exchanged heat with the refrigerant is introduced in series to the battery and the second piece of equipment such that the liquid flowing out from the battery passes through the first bypass channel and is introduced to the second piece of equipment.

4 more elements

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.

26 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/726,754Filed 22 Apr 2022 · division
Priority: JP 2018-18526028 Sep 2018
Published: US 2022/0242194 A14 Aug 2022
Granted: 13 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

B60H 1/00278
HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit: for the battery
B60H 1/00007
Heating, cooling or ventilating devices: combined heating, ventilating, or cooling devices
B60H 1/00392
For vehicles having an electrical drive, e.g. hybrid or fuel cell: for electric vehicles having only electric drive means
B60H 1/00885
The components being temperature regulating devices: controlling the flow of heating or cooling liquid, e.g. valves or pumps

Family

Application16/502,556Parent of this division · filed 3 Jul 2019
US 2022/0242194 A1Pre-grant publication · published 4 Aug 2022
US 2020/0101814 A1Published application
US 11,897,309 B2This patent

From the US filing history. Foreign family members aren’t listed.

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