HEAT EXCHANGE SYSTEM

• US 20140290296A1
• Filed: 12/03/2012
• Published: 10/02/2014
• Est. Priority Date: 12/05/2011
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Katoh, Yoshiki
• Granted Patent: US 9,592,717 B2
• Time in Patent Office: Days
• US Class Current: 62/238.7
• CPC Class Codes: B60H 1/00042 the air passing only one heat exchanger
• CPC Class Codes: B60H 1/00328 of the liquid-air type
• CPC Class Codes: B60H 1/3213 for increasing the efficiency in a vehicle heat pump
• CPC Class Codes: B60H 1/3227 characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator condensed liquid drainage means B60H1/3233
• CPC Class Codes: B60H 1/32281 comprising a single secondary circuit, e.g. at evaporator or condenser side
• CPC Class Codes: B60K 11/04 Arrangement or mounting of radiators, radiator shutters, or radiator blinds B60K11/085 takes precedence
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/425 Temperature
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: F28D 1/0246 heat-exchange elements having several adjacent conduits forming a whole, e.g. blocks
• CPC Class Codes: F28D 1/0452 Combination of units extending one behind the other with units extending one beside or one above the other
• CPC Class Codes: F28D 1/05391 with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
• CPC Class Codes: F28F 2009/0287 having passages for different heat exchange media
• CPC Class Codes: F28F 2215/02 Arrangements of fins common to different heat exchange sections, the fins being in contact with different heat exchange media
• CPC Class Codes: F28F 9/0278 in the form of stacked distribution plates or perforated plates arranged over end plates
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility

Abstract

A heat exchange system includes a first heat exchanger that radiates heat of at least a cooling cycle, a cooler circuit in which a coolant for a heat-emitting device flows, a plurality of heat exchangers that are connected to the cooler circuit and radiate heat of the coolant, and a blower that sends air to the first heat exchanger and the plurality of heat exchangers to cool. The plurality of heat exchangers are arranged in a blowing direction of the blower, and separately radiate heat of the cooler circuit. The heat exchanger, which is disposed on the windward side, of the plurality of heat exchangers is thermally connected to the first heat exchanger, and the heat exchanger disposed on the windward side radiates heat by itself and also radiates heat through the first heat exchanger.

Claims

1. A heat exchange system comprising:

a first heat exchanger that radiates heat of at least a cooling cycle;

a cooler circuit in which a coolant for a heat-emitting device flows;

a plurality of heat exchangers that are connected to the cooler circuit and radiate heat of the coolant; and

a blower that sends air to the first heat exchanger and the plurality of heat exchangers to cool, wherein

the plurality of heat exchangers are arranged in a blowing direction of the blower and separately radiate heat of the cooler circuit, and

one heat exchanger of the plurality of heat exchangers is disposed on a windward side and is thermally connected to the first heat exchanger, and the one heat exchanger disposed on the windward side radiates heat by itself and also radiates heat through the first heat exchanger.

2. The heat exchange system according to claim 1, wherein

the first heat exchanger comprises an air-conditioning heat exchanger that is a part of a first fluid circuit air-conditioning a passenger compartment of a vehicle, and

the cooler circuit comprises a second fluid circuit that cools the heat-emitting device other than an engine of the vehicle.

3. The heat exchange system according to claim 1, wherein

the plurality of heat exchangers comprises a second heat exchanger that is the one heat exchanger disposed on the windward side and a third heat exchanger that is disposed on a leeward side, and

the second heat exchanger is disposed adjacent to or integrally with the first heat exchanger.

4. The heat exchange system according to claim 1, wherein

the first heat exchanger comprises a heat exchanger that radiates heat of brine flowing in a liquid-cool condenser after a refrigerant compressed by a compressor is cooled by the liquid-cool condenser.

5. The heat exchange system according to claim 1, wherein

the first heat exchanger and the one heat exchanger disposed on the windward side, of the plurality of heat exchangers, comprise a three-fluid heat exchanger that transfers heat using a part of a core.

6. The heat exchange system according to claim 3, wherein

the second heat exchanger and the third heat exchanger are arranged in a manner that the coolant which serves as internal fluid flows through the heat exchangers in parallel.

7. The heat exchange system according to claim 3, wherein

the second heat exchanger and the third heat exchanger are arranged in a manner that the coolant which serves as internal fluid flows through the heat exchangers in series.

8. The heat exchange system according to claim 7, wherein

the third heat exchanger is disposed on an upstream side and the second heat exchanger is disposed on a downstream side in a flow direction of the internal fluid.

9. The heat exchange system according to claim 6, further comprising:

a flow control valve that controls a flow rate of the coolant in the second heat exchanger, and

the flow control valve is opened when it is regarded that a temperature of the coolant is higher than or equal to a predetermined temperature such that heat is radiated not only in the third heat exchanger but also in the second heat exchanger.

10. The heat exchange system according to claim 1, wherein

the refrigerating cycle comprises a heat pump cycle that is capable of cooling and heating air in a passenger compartment of a vehicle, and includes a cooling/heating switching unit that switches a heating cycle and the cooling cycle from each other, and

the first heat exchanger of the cooling cycle operates as a heat absorber when being switched to the heating cycle.

11. The heat exchange system according to claim 9, wherein

the refrigerating cycle comprises a heat pump cycle that is capable of cooling and heating air in a passenger compartment of a vehicle, and includes a cooling/heating switching unit that switches a heating cycle and the cooling cycle from each other,

the first heat exchanger of the cooling cycle operates as a heat absorber when being switched to the heating cycle, and

the flow control valve is controlled so that the coolant flows to the second heat exchanger when the heating cycle operates.

12. The heat exchange system according to claim 3, wherein

the refrigerating cycle comprises a heat pump cycle that is capable of cooling and heating air in a passenger compartment of a vehicle, and includes a cooling/heating switching unit that switches a heating cycle and the cooling cycle from each other,

the first heat exchanger of the cooling cycle operates as a heat absorber when being switched to the heating cycle,

the cooler circuit is provided with a heat-storage bypass passage bypassing at least the second heat exchanger, and a passage switching unit switching the coolant to flow into the heat-storage bypass passage or the second heat exchanger, and

the passage switching unit causes the coolant which has passed through the heat-storage bypass passage to flow into the second heat exchanger at a time of defrosting the heat absorber.

13. The heat exchange system according to claim 12, wherein

the passage switching unit causes the heat-storage bypass passage to store heat by flowing the coolant at a time of not defrosting, and

the passage switching unit stops the coolant from flowing into the heat-storage bypass passage and allows the coolant, which has stored heat, to flow into the second heat exchanger at the time of defrosting.

14. The heat exchange system according to claim 3, wherein

the heat-emitting device of the cooler circuit comprises a device other than an engine, and

the third heat exchanger is integrated with a heat exchanger for the engine.

15. The heat exchange system according to claim 14, wherein

the third heat exchanger and the heat exchanger for the engine transfer heat to each other using a part of a core and are integrally formed as a three-fluid heat exchanger that exchanges heat with air.

16. The heat exchange system according to claim 14, wherein

the first heat exchanger and the second heat exchanger transfer heat to each other using a part of a core and are integrally formed as a first three-fluid heat exchanger on a windward side, and

the third heat exchanger and the heat exchanger for the engine transfer heat to each other using a part of a core and are integrally formed as a second three-fluid heat exchanger on a leeward side.

17. The heat exchange system according to claim 16, wherein

the first three-fluid heat exchanger and the second three-fluid heat exchanger are further integrated with each other, so that the first heat exchanger, the second heat exchanger, the third heat exchanger, and the heat exchanger for the engine transfer heat to each other using a part of a common core.

18. The heat exchange system according to claim 7, wherein

the second heat exchanger disposed on the windward side and the third heat exchanger disposed on the leeward side are arranged in a manner that the coolant which serves as internal fluid flows in series from the third heat exchanger to the second heat exchanger and that the coolant flows to be a counter flow against a flow of air.