Thermal management system for vehicle

Patent metadata

Field	Value
Publication number	US-9744827-B2
Application number	US-201414782563-A
Country	US
Kind code	B2
Filing date	Mar 27, 2014
Priority date	Apr 8, 2013
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A heat medium circulation equipment, a first pump, and a second pump are connected to a first switching valve and a second switching valve. A heater core is connected to at least one of the first switching valve and the second switching valve, and connected to a heat medium circuit. A state, in which the heat medium discharged by a third pump flows into the heater core, is selected by switching of a switching device.

First claim

What is claimed is:

1. A thermal management system for a vehicle, comprising:
a first pump that draws and discharges a heat medium;
a second pump that draws and discharges the heat medium;
a third pump that draws and discharges the heat medium;
a heat medium circulation equipment through which the heat medium circulates;
a first switching valve connected with an outlet side of the first pump, an outlet side of the second pump, and an inlet side of the heat medium circulation equipment, the first switching valve switching between a state in which the heat medium discharged from the first pump flows into the heat medium circulation equipment and a state in which the heat medium discharged from the second pump flows into the heat medium circulation equipment;
a second switching valve connected with an intake side of the first pump, an intake side of the second pump, and an outlet side of the heat medium circulation equipment, the second switching valve switching between a state in which the heat medium flows out of the heat medium circulation equipment and into the first pump and a state in which the heat medium flows out of the heat medium circulation equipment and into the second pump;
a heat medium circuit in which the heat medium discharged by the third pump circulates;
a heat generation equipment disposed in the heat medium circuit and generating a heat;
a heat utilization equipment connected to at least one of the first switching valve and the second switching valve and connected to the heat medium circuit, the heat utilization equipment utilizing the heat of the heat medium; and
a switching device that switches between a state in which the heat medium discharged by one of the first pump and the second pump circulates through the heat utilization equipment and a state in which the heat medium discharged by the third pump circulates through the heat utilization equipment.

2. The thermal management system for a vehicle, according to claim 1 , wherein, when the heat medium discharged by the one of the first pump and the second pump circulates through the heat utilization equipment, the switching device blocks the heat medium discharged by the third pump from flowing through the heat utilization equipment.

3. The thermal management system for a vehicle, according to claim 1 , wherein, when the heat medium discharged by the third pump circulates through the heat utilization equipment, at least one of the first switching valve and the second switching valve, or the switching device blocks the heat medium discharged by the first pump and the heat medium discharged by the second pump from flowing through the heat utilization equipment.

4. The thermal management system for a vehicle, according to claim 1 , further comprising:
a branch part that branches a flow of the heat medium discharged from the first pump into a flow toward the first switching valve and a flow toward the heat utilization equipment; and
a merging part that merges the heat medium flowing out of the second switching valve and the heat medium flowing out of the heat utilization equipment.

5. The thermal management system for a vehicle, according to claim 1 , further comprising:
a pressure adjustment device disposed in any one circuit of a first circulation circuit in which the heat medium discharged by the first pump circulates, a second circulation circuit in which the heat medium discharged by the second pump circulates, and the heat medium circuit, the pressure adjustment device adjusting a pressure of the heat medium; and
a first communication portion and a second communication portion through which the circuit provided with the pressure adjustment device communicates with the other two circuits, respectively, wherein
an average pressure of a pump discharge pressure and a pump suction pressure in the circuit provided with the pressure adjustment device is defined as a first average pressure,
the pressure of the heat medium is higher than the first average pressure on a predetermined portion of the circuit provided with the pressure adjustment device, and
the predetermined portion of the circuit provided with the pressure adjustment device communicates with the other two circuits through the first communication portion.

6. The thermal management system for a vehicle, according to claim 5 , wherein
an average pressure of a pump discharge pressure and a pump suction pressure in the respective other two circuits is defined as a second average pressure,
the pressure of the heat medium is lower than the second average pressure on respective predetermined portions of the other two circuits, and
the circuit provided with the pressure adjustment device communicates with the respective predetermined portions of the other two circuits through the first communication portion.

7. The thermal management system for a vehicle, according to claim 5 , further comprising:
a third communication portion through which the first communication portion communicates with the second communication portion, wherein
an average pressure of a pump discharge pressure and a pump suction pressure in the respective other two circuits is defined as a second average pressure,
the pressure of the heat medium is higher than the second average pressure on respective predetermined portions of the other two circuits, and
the circuit provided with the pressure adjustment device communicates with the respective predetermined portions of the other two circuits through the first communication portion,
the thermal management system further comprising:
a first narrowed part in the second communication portion disposed between the third communication portion and the circuit provided with the pressure adjustment device, the first narrowed part narrowing a flow of the heat medium; and
a second narrowed part in the second communication portion disposed between the third communication portion and the other two circuits, the second narrowed part narrowing a flow of the heat medium.

8. The thermal management system for a vehicle, according to claim 5 , wherein
each of the remaining two circuits has a communication hole that communicates with the second communication portion, and
the communication hole is open upward in a direction of gravity.

9. The vehicle management system for a vehicle, according to claim 5 , wherein
the first communication portion has two branch flow channels which are connected, respectively, to the other two circuits, and
the second communication portion has two branch flow channels which are connected, respectively, to the other two circuits.

10. The thermal management system for a vehicle, according to claim 1 , wherein
the switching device switches among a state in which the heat medium discharged by the one of the first pump and the second pump flows through the heat utilization equipment, a state in which the heat medium discharged by the other of the first pump and the second pump flows through the heat utilization equipment, and a state in which the heat medium discharged by the third pump flows through the heat utilization equipment, and
when the heat medium discharged by the other of the first and second pumps flows through the heat utilization equipment, the switching device blocks the heat medium discharged by the third pump from flowing through the heat utilization equipment.

11. The thermal management system for a vehicle, according to claim 10 , further comprising:
a heat medium cooling unit that cools the heat medium by absorbing the heat of the heat medium; and
a second heat utilization equipment that uses the heat of the heat medium, wherein
when the heat medium discharged by the first pump flows in th

Assignees

• Denso Corp

Inventors

• Nishikawa Michio
• Kakehashi Nobuharu
• Enomoto Norihiko
• Katoh Yoshiki
• Sugimura Kengo

Classifications

• B60H1/32284

  comprising two or more secondary circuits, e.g. at evaporator and condenser side · CPC title

• B60L58/27

  by heating · CPC title

• B60L58/26

  by cooling · CPC title

• F01P3/20

  Cooling circuits not specific to a single part of engine or machine (F01P3/22 takes precedence) · CPC title

• F01P2060/08

  Cabin heater · CPC title