Vehicle heat management system including a switching valve

Patent metadata

Field	Value
Publication number	US-9649909-B2
Application number	US-201314408854-A
Country	US
Kind code	B2
Filing date	May 21, 2013
Priority date	Jun 20, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A first heat transfer medium circuit includes a first path and a second heat transfer medium circuit includes a second path are formed independently from each other by operating a first switching valve and a second switching valve in conjunction with each other to make each of multiple flow passages of a first flow passage group communicate with either the first path or the second path. The first and second heat transfer medium circuits in which the first path and the second path are connected to each other in series is formed by operating the first switching valve and the second switching valve in conjunction with each other to make each of the multiple flow passages of the first flow passage group communicate with both the first path and the second path.

First claim

The invention claimed is:

1. A vehicle heat management system comprising:
a first pump and a second pump that suck a heat transfer medium and discharge the heat transfer medium;
a first path in which the heat transfer medium flows and the first pump is disposed;
a second path in which the heat transfer medium flows and the second pump is disposed;
a first flow passage group that includes flow passages in which the heat transfer medium flows;
a first switching valve to which an inlet side of the first path and an inlet side of the second path are connected in parallel and to which outlet sides of the flow passages of the first flow passage group are connected in parallel, wherein the first switching valve switches communication states of the flow passages of the first flow passage group individually between a state communicating with the first path and a state communicating with the second path; and
a second switching valve to which an outlet side of the first path and an outlet side of the second path are connected in parallel and to which inlet sides of the flow passages of the first flow passage group are connected in parallel, wherein the second switching valve switches communication states of the flow passages of the first flow passage group individually between a state communicating with the first path and a state communicating with the second path, wherein
the first switching valve and the second switching valve operate in conjunction with each other,
when a first predetermined condition is satisfied, each of the flow passages of the first flow passage group communicates with either the first path or the second path to provide a heat transfer medium circuit including the first path and a heat transfer medium circuit including the second path which are independent from each other,
when a second predetermined condition is satisfied, each of the flow passages of the first flow passage group communicates with both the first path and the second path to provide a heat transfer medium circuit in which the first path communicates with the second path in series;
the second path includes a flow passage connected to the first switching valve and a flow passage connected to the second switching valve,
the vehicle heat management system further comprising:
a third pump that sucks the heat transfer medium and discharges the heat transfer medium;
a third path in which the heat transfer medium flows and the third pump is disposed;
a second flow passage group that includes flow passages in which the heat transfer medium flows;
a third switching valve to which an outlet side of the flow passage of the second path connected to the first switching valve and an outlet side of the third path are connected in parallel and to which inlet sides of the flow passages of the second flow passage group are connected in parallel, wherein the third switching valve switches communication states of the flow passages of the second flow passage group individually between a state communicating with the second path and a state communicating with the third path; and
a fourth switching valve to which an inlet side of the flow passage of the second path connected to the second switching valve and an inlet side of the third path are connected in parallel and to which outlet sides of the flow passages of the second flow passage group are connected in parallel, wherein the fourth switching valve switches communication states of the flow passages of the second flow passage group individually between a state communicating with the second path and a state communicating with the third path, wherein
the third switching valve and the fourth switching valve operate in conjunction with each other,
when a third predetermined condition is satisfied, each of the flow passages of the second flow passage group communicates with either the second path or the third path to provide the heat transfer medium circuit including the second path and a heat transfer medium circuit including the third path which are independent from each other, and
when a fourth predetermined condition is satisfied, each of the flow passages of the second flow passage group communicates with both the second path and the third path to provide a heat transfer medium circuit in which the second path communicates with the third path in series.

2. The vehicle heat management system according to claim 1 , further comprising:
a second-path radiator disposed in the second path, wherein the heat transfer medium exchanges heat with outside air in the second-path radiator; and
a third-path radiator disposed in the third path, wherein the heat transfer medium exchanges heat with outside air in the third-path radiator, wherein
the third path includes a heat-transfer-medium flow passage provided in an engine of a vehicle,
at least one of devices including: a heat-transfer-medium-cooling heat exchanger that cools the heat transfer medium by heat exchange between a low-pressure refrigerant of a refrigeration cycle and the heat transfer medium; a heat-transfer-medium-heating heat exchanger that heats the heat transfer medium by heat exchange between a high-pressure refrigerant of the refrigeration cycle and the heat transfer medium; an intake-air-cooling heat exchanger that cools intake air of the engine by heat exchange between the intake air and the heat transfer medium; a heat generator that generates heat; a first heat storage device that stores at least one of heat and cold; and a first air-heating heat exchanger that heats air blown into a vehicle interior by heat exchange between the blown air and the heat transfer medium, is disposed in the first flow passage group, and
at least one of a plurality of devices including: an exhaust-gas heat exchanger in that the heat transfer medium exchanges heat with exhaust gas of the engine; an oil heat exchanger in that the heat transfer medium exchanges heat with oil; a second heat storage device that stores at least one of heat and cold; and a second air-heating heat exchanger that heats air blown into the vehicle interior by heat exchange between the blown air and the heat transfer medium, is disposed in the second flow passage group.

3. The vehicle heat management system according to claim 2 , wherein
the fourth predetermined condition is that the temperature of the heat transfer medium in the second path is higher than the temperature of the heat transfer medium in the third path, and
the third predetermined condition is that the temperature of the heat transfer medium in the second path or the temperature of the heat transfer medium in the third path is higher than a predetermined temperature.

4. The vehicle heat management system according to claim 3 , being used for a hybrid vehicle operating or stopping the engine in accordance with a state of charge of a battery supplying power to a vehicle-running electric motor, the vehicle heat management system further comprising:
a first bypass flow passage through which the heat transfer medium flows to bypass the second-path radiator;
a second bypass flow passage through which the heat transfer medium flows to bypass the third-path radiator;
a second-path switching device that switches between a case in which the heat transfer medium flows through the second-path radiator and a case in which the heat transfer medium flows through the first bypass flow passage;
a third-path switching device that switches between a case in which the heat transfer medium flows through the third-path radiator and a case in which the heat transfer medium flows through the second bypass flow passage; and
a controller that switches the second-path switching device to make the heat transfer medium flow through the first bypass flow passage and switches the third-path switching device to make the heat transfer medium flow through the s

Assignees

• Denso Corp

Inventors

• Enomoto Norihiko
• Kakehashi Nobuharu
• Nishikawa Michio

Classifications

• B60L1/02

  to electric heating circuits · CPC title

• B60L2260/44

  by parameter estimation · CPC title

• B60L2240/36

  Temperature of vehicle components or parts · CPC title

• B60L2240/662

  Temperature · CPC title

• F01P2050/24

  Hybrid vehicles · CPC title