Vehicular heat management system

Patent metadata

Field	Value
Publication number	US-11499757-B2
Application number	US-202016854843-A
Country	US
Kind code	B2
Filing date	Apr 21, 2020
Priority date	Oct 26, 2017
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

A vehicular heat management system includes a heat pump cycle capable of heating a heat-exchanging-object fluid by using exhaust heat of an in-vehicle device as a heat source that radiates heat during operation, and an exhaust-heat refrigerant circuit that releases the exhaust heat to outside air through an exhaust-heat refrigerant. The heat pump cycle includes a recovery heat exchange portion that performs heat exchange between a heated air heated by the exhaust heat and a cycle refrigerant circulating in the heat pump cycle. The exhaust-heat refrigerant circuit includes an exhaust-heat exchange portion that performs heat exchange between the heated air and the exhaust-heat refrigerant. The recovery heat exchange portion and the exhaust-heat exchange portion are integrally formed as a combined heat exchanger capable of transferring heat between the cycle refrigerant and the exhaust-heat refrigerant.

First claim

The invention claimed is:

1. A vehicular heat management system comprising:
a heat pump cycle capable of heating a heat-exchanging-object fluid by using exhaust heat from an in-vehicle device as a heat source that radiates heat during operation; and
an exhaust-heat refrigerant circuit for releasing the exhaust heat to outside air through an exhaust-heat refrigerant, wherein
the heat pump cycle includes a recovery heat exchange portion for performing heat exchange between air heated by the exhaust heat and a cycle refrigerant circulating in the heat pump cycle,
the exhaust-heat refrigerant circuit includes an exhaust-heat exchange portion for performing heat exchange between the heated air and the exhaust-heat refrigerant,
the recovery heat exchange portion and the exhaust-heat exchange portion are integrally formed as a combined heat exchanger capable of transferring heat between the cycle refrigerant and the exhaust-heat refrigerant,
the combined heat exchanger includes a heat-exchange fin for promoting the heat exchange between the heated air and the cycle refrigerant and for promoting the heat exchange between the heated air and the exhaust-heat refrigerant, and
the heat-exchange fin is in contact with both the recovery heat exchange portion and the exhaust-heat exchange portion to transfer heat between the cycle refrigerant and the exhaust-heat refrigerant.

2. The vehicular heat management system according to claim 1 , wherein the in-vehicle device and at least a part of the combined heat exchanger are arranged in an internal space of a heat insulating housing.

3. The vehicular heat management system according to claim 2 , further comprising a duct provided in the internal space for the heated air to flow through the duct, wherein the in-vehicle device is disposed in the duct.

4. The vehicular heat management system according to claim 3 , wherein
the in-vehicle device is one of a plurality of in-vehicle devices, and
the duct has a plurality of suction ports configured to suck air, respectively, heated by exhaust heat from the plurality of in-vehicle devices.

5. The vehicular heat management system according to claim 2 , wherein
the heat pump cycle includes an air-conditioning outdoor heat exchanger for performing heat exchange between the cycle refrigerant and the outside air to condense the cycle refrigerant,
the exhaust-heat refrigerant circuit includes a waste-heat outdoor heat exchanger for performing heat exchange between the exhaust-heat refrigerant and the outside air to condense the exhaust-heat refrigerant which has been vaporized in the exhaust-heat exchange portion, and
the air-conditioning outdoor heat exchanger and the waste-heat outdoor heat exchanger are both arranged outside the heat insulating housing.

6. The vehicular heat management system according to claim 5 , wherein the air-conditioning outdoor heat exchanger and the waste-heat outdoor heat exchanger are arranged such that, during operation of the vehicular heat management system, the flow direction of outside air through the air-conditioning outdoor heat exchanger is parallel to the flow direction of outside air through the waste-heat outdoor heat exchanger without being overlapped in an outside-air introduction direction in which the outside air is introduced into a vehicle.

7. The vehicular heat management system according to claim 1 , wherein
the cycle refrigerant flowing into the recovery heat exchange portion is in liquid phase or gas-liquid two-phase, and
the heat pump cycle includes a valve for reducing a pressure of the cycle refrigerant flowing to the recovery heat exchange portion to be lower than a saturation pressure of the cycle refrigerant that corresponds to a temperature of the heated air.

8. The vehicular heat management system according to claim 1 , wherein
the recovery heat exchange portion has a cycle refrigerant tube through which the cycle refrigerant flows,
the cycle refrigerant tube has a downstream passage portion forming a most downstream portion of a refrigerant passage inside the cycle refrigerant tube such that the cycle refrigerant flows from a lower side to an upper side of the downstream passage portion, and
at least a part of the downstream passage portion is disposed windward of another portion of the refrigerant passage.

9. The vehicular heat management system according to claim 8 , wherein a passage cross-sectional area of the refrigerant passage in each of the cycle refrigerant tubes increases in a downstream direction of refrigerant flow.

10. The vehicular heat management system according to claim 8 , wherein
the cycle refrigerant tube is one of a plurality of cycle refrigerant tubes,
a path is defined as a refrigerant flow path formed by a tube group of the plurality of cycle refrigerant tubes through which refrigerant flows in the same direction from a predetermined space to another space formed in the recovery heat exchange portion,
the path is one of a plurality of paths formed by the plurality of cycle refrigerant tubes, and
a total passage cross-sectional area of the cycle refrigerant tubes forming the paths increases in a downstream direction of refrigerant flow.

11. The vehicular heat management system according to claim 1 , wherein
the exhaust-heat exchange portion has an exhaust-heat refrigerant tube through which the exhaust-heat refrigerant flows, and
the exhaust-heat refrigerant tube is arranged so that the exhaust-heat refrigerant flows from a lower side to an upper side of the exhaust-heat exchange portion.

12. The vehicular heat management system according to claim 1 , wherein the heat pump cycle includes a refrigerant circuit switch for switching between a refrigerant circuit through which the cycle refrigerant flows into the recovery heat exchange portion and a refrigerant circuit through which the cycle refrigerant does not flow into the recovery heat exchange portion.

13. The vehicular heat management system according to claim 1 , wherein the exhaust-heat refrigerant circuit has a refrigerant circulation shutter for shutting off circulation of the exhaust-heat refrigerant.

14. A vehicular heat management system comprising:
a heat pump cycle capable of heating a heat-exchanging-object fluid by using exhaust heat from an in-vehicle device as a heat source that radiates heat during operation; and
an exhaust-heat refrigerant circuit for releasing the exhaust heat to outside air through an exhaust-heat refrigerant, wherein
the heat pump cycle includes a recovery heat exchange portion for performing heat exchange between air heated by the exhaust heat and a cycle refrigerant circulating in the heat pump cycle,
the exhaust-heat refrigerant circuit includes an exhaust-heat exchange portion for performing heat exchange between the heated air and the exhaust-heat refrigerant,
the recovery heat exchange portion and the exhaust-heat exchange portion are integrally formed as a combined heat exchanger capable of transferring heat between the cycle refrigerant and the exhaust-heat refrigerant, and
the in-vehicle device and at least a part of the combined heat exchanger are arranged in an internal space of a heat insulating housing,
the vehicular heat management system further comprising a duct provided in the internal space for the heated air to flow through the duct, wherein
the in-vehicle device is disposed in the duct,
the in-vehicle device is one of a plurality of in-vehicle devices, and
the duct has a plurality of suction ports configured to suck air, respectively, heated by exhaust heat from the plurality of in-vehicle devices.

Assignees

• Denso Corp

Inventors

• KOZASA Tetsuo

Classifications

• B60H1/3213

  for increasing the efficiency in a vehicle heat pump · CPC title

• B60H1/00007

  Combined heating, ventilating, or cooling devices (control systems or mechanisms B60H1/00642) · CPC title

• B60H1/00921

  where the flow direction of the refrigerant does not change and there is an extra subcondenser, e.g. in an air duct · CPC title

• F25B41/20

  Disposition of valves, e.g. of on-off valves or flow control valves (expansion valves F25B41/31) · CPC title

• B60H1/00278

  for the battery · CPC title