GB2377268A - A heat exchanger with isolated cooling circuits - Google Patents

A heat exchanger with isolated cooling circuits Download PDF

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Publication number
GB2377268A
GB2377268A GB0116618A GB0116618A GB2377268A GB 2377268 A GB2377268 A GB 2377268A GB 0116618 A GB0116618 A GB 0116618A GB 0116618 A GB0116618 A GB 0116618A GB 2377268 A GB2377268 A GB 2377268A
Authority
GB
United Kingdom
Prior art keywords
heat exchanger
manifold
baffles
cooling circuit
tubes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0116618A
Other versions
GB0116618D0 (en
Inventor
Ian James Rawley
Jayesh Ravat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Visteon Global Technologies Inc
Original Assignee
Visteon Global Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Visteon Global Technologies Inc filed Critical Visteon Global Technologies Inc
Priority to GB0116618A priority Critical patent/GB2377268A/en
Publication of GB0116618D0 publication Critical patent/GB0116618D0/en
Priority to DE2002130659 priority patent/DE10230659A1/en
Publication of GB2377268A publication Critical patent/GB2377268A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0209—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions
    • F28F9/0212—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions the partitions being separate elements attached to header boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0443—Combination of units extending one beside or one above the other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • F01P2003/185—Arrangements or mounting of liquid-to-air heat-exchangers arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2031/00—Fail safe
    • F01P2031/18—Detecting fluid leaks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • F01P2060/045—Lubricant cooler for transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/14—Condenser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0084—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0089—Oil coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/0287—Other particular headers or end plates having passages for different heat exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/16—Safety or protection arrangements; Arrangements for preventing malfunction for preventing leakage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2270/00—Thermal insulation; Thermal decoupling
    • F28F2270/02—Thermal insulation; Thermal decoupling by using blind conduits

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • General Details Of Gearings (AREA)

Abstract

A heat exchanger (1) with a number of isolated cooling circuits; in particular a heat exchanger unit for an automobile, having a cooling circuit for operating as a condenser for an air conditioning system and a cooling circuit operating as a transmission oil cooler for vehicle transmission. The heat exchanger comprises two manifolds (4,16) which are connected to a heat exchanger core comprising a plurality of tubes (6-13), in which each manifold has a pair of baffles (14,15,17,18) positioned either side of a redundant tube (9), such that two isolated circuits are formed, and the redundant tube does not form part of either circuit. A hole (23,24) in the manifold wall between the pair of baffles enables leak testing to be performed.

Description

<Desc/Clms Page number 1>
HEAT EXCHANGER This invention relates to a heat exchanger with a number of isolated cooling circuits. In particular, although not exclusively, a heat exchanger unit for an automobile having a cooling circuit for operating as a condenser for an air conditioning system and a cooling circuit operating as an oil cooler (TOC) for transmission or other systems requiring cooling.
Heat exchangers of the type to which this invention relates have manifolds to which a large number of refrigerant/cooling tubes are connected. The refrigerant/cooling tubes usually have fins that are mounted between the tubes, and the tubes and fins together form a heat exchanger core. Fluid in the form of a refrigerant or coolant flows from the manifold through the refrigerant/cooling tubes, and when the fluid passes through the tubes it is in heat exchange relationship with another fluid flowing past the tubes.
In a typical motor vehicle cooling circuit, coolant passes through the vehicle engine and its temperature rises. It then passes through the radiator, entering the radiator through the manifold and then passing through cooling tubes where air flows over the tubes to remove heat from and to reduce the temperature of the coolant before the coolant is recirculated via a second manifold to the vehicle engine.
<Desc/Clms Page number 2>
In a typical air conditioning circuit a refrigerant absorbs heat from the interior passenger compartment via an evaporator. The gaseous refrigerant is then compressed to create a superheated vapour that enters a cooling circuit which acts as a condenser. As the vapour passes through the cooling circuit, heat is removed from the refrigerant by the air flow over the tubes to reduce the temperature of the refrigerant thus condensing the gaseous refrigerant, resulting in high pressure liquid refrigerant leaving the condenser. The liquid refrigerant flows through a pressure relief system, to reduce the pressure of the refrigerant, and continues the air conditioning cycle to provide the required passenger comfort It is known for heat exchangers to have more than one isolated cooling circuit. For example, US 6082447 uses a dual baffle assembly to isolate an air conditioning circuit from an oil cooling circuit. It is an advantage for such heat exchangers to provide a thermal barrier between the two heat exchange circuits. In DE 19536116 a solid rod is used to provide a thermal barrier between two circuits, and in FR 9313893 a shortened tube is similarly used to provide a thermal barrier between cooling circuits.
A problem with such known heat exchangers having two cooling circuits is that specially manufactured core assemblies are required in order to provide a thermal barrier between the two circuits.
According to the present invention there is provided a
<Desc/Clms Page number 3>
heat exchanger comprising: two manifolds which are connected to a heat exchanger core comprising a plurality of tubes, in which each manifold has a partition positioned either side of a redundant tube, such that two isolated circuits are formed, and the redundant tube does not form part of either circuit.
It is advantageous for leak testing if one manifold has a hole for use during leak testing positioned between the pair of baffles. Preferably each manifold has a hole for use during leak testing positioned between the pair of baffles.
In a preferred embodiment of the invention the heat exchanger is provided for use in an automobile in which one of the isolated circuits is a cooling circuit for an air conditioning system and one of the isolated circuits is a transmission oil cooler for a transmission system.
In another embodiment the heat exchanger is provided for use in an automobile in which one of the isolated circuits is a refrigerant circuit for an air conditioning system and one of the isolated circuits is an oil cooler for use by a power assisted steering device.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawing in which
<Desc/Clms Page number 4>
Figure 1 illustrates a heat exchanger according to the present invention.
Figure 1 illustrates schematically part of a heat exchanger 1 for an automobile in which has a cooling circuit 2 for operating as a condenser for an air conditioning system and a cooling circuit 3 operating as a transmission oil cooler (TOC) for a transmission system.
The heat exchanger 1 comprises a manifold 4 which is connected to a heat exchanger core 5. The heat exchanger core 5 comprises a plurality of tubes 6,7, 8,9, 10,11, 12,13. In the schematic illustration of Figure 1 fins associated with the tubes are not shown. A pair of baffles 14,15 are positioned either side of tube 9. Similarly, a second manifold 16 is connected to the heat exchanger core 5. the second manifold 16 also has a pair of baffles 17, 18 positioned either side of the tube 9. Thus tube 9 opens into the space between each pair of baffles 14,15 and 17, 18.
Air conditioning refrigerant flows into part of the manifold 4 via inlet 19. The refrigerant flows through tubes 6,7, 8 (and other tubes, not shown) where it is cooled by air flowing over the tubes and associated fins.
The refrigerant fluid circuit can take many forms throughout the heat exchanger, Figure 1. is an example having a single pass fluid flow. The condensed refrigerant is then re-circulated to the air conditioning system, passing out of the cooling circuit 2 via part of the second manifold 16 and outlet 20.
<Desc/Clms Page number 5>
Transmission oil flows into part of the header tank 4 via inlet 21. The oil flows through tubes 10,11, 12,13 (and other tubes, not shown) where, in a similar manner to the air conditioning refrigerant, it is cooled by air flowing over the tubes and associated fins. The cooled oil is then re-circulated to the vehicle transmission, passing out of the cooling circuit 3 via part of the second manifold 16 and outlet 22.
Redundant tube 9 does not form part of either cooling circuit. The tube 9 serves as a thermal barrier between the air conditioning cooling circuit 2 and the transmission oil cooling circuit 3. It will be appreciated that more than one redundant tube could be used to form a single barrier, and that more than two separate coolant circuits could be created using a second redundant tube elsewhere in the core 5.
The manifold 4 has a hole 23 in the space between the baffle 14 and the baffle 15. The hole, together with the baffles 14,15 and redundant tube 9, serves to aid pressure leak testing. Leak testing is performed by pumping helium into the cooling circuit under test. For example, when cooling circuit 2 is to be tested, helium is pumped into inlet 19, and the heat exchanger 1 is monitored for leaking helium. Any leak across the baffle 14 will be detected by helium leaking through the hole 23. Similarly, when cooling circuit 3 is tested, any leak across the baffle 15 will be detected by helium leaking through the hole 23.
<Desc/Clms Page number 6>
Thus, the twin partition arrangement described, together with a suitably positioned leak testing point (i. e. hole 23), has a testing advantage over single baffle arrangements for provision of twin cooling circuits. Leaks across a single baffle, or dual baffle arrangements where there is no space between the baffles, are extremely difficult to detect as it is inconvenient to provide a suitable leak testing point.
In the embodiment of the invention shown in Figure 1 the manifold 16 also has a hole 24 in the space between the baffle 17 and the baffle 18. The hole 24, together with the baffles 17,18 and redundant tube 9, also serves to aid pressure leak testing, as a leak across either one of the baffles 17,18, will be detected more readily by detecting a leak via hole 24, although it will be appreciated that such leaks could be detected at hole 23, as the testing gas would flow through hole 23 via redundant tube 9.

Claims (6)

  1. CLAIMS 1. A heat exchanger comprising: two manifolds which are connected to a heat exchanger core comprising a plurality of tubes, in which each manifold has a pair of baffles positioned either side of a redundant tube, such that two isolated circuits are formed, and the redundant tube does not form part of either circuit.
  2. 2. A heat exchanger according to claim 1 in which one manifold has a hole for use during leak testing positioned between the pair of baffles.
  3. 3. A heat exchanger according to claim 2 in which each manifold has a hole for use during leak testing positioned between the pair of baffles.
  4. 4. A heat exchanger according to any one of the preceding claims for use in an automobile in which one of the isolated circuits is a cooling circuit for an air conditioning system and one of the isolated circuits is a transmission oil cooler for an engine oil system.
  5. 5. A heat exchanger according to any one of the preceding claims for use in an automobile in which one of the isolated circuits is a cooling circuit for an air
    <Desc/Clms Page number 8>
    conditioning system and one of the isolated circuits is an oil cooler for use by a power assisted steering device.
  6. 6. A heat exchanger substantially as herein described with reference to the accompanying drawing.
GB0116618A 2001-07-07 2001-07-07 A heat exchanger with isolated cooling circuits Withdrawn GB2377268A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0116618A GB2377268A (en) 2001-07-07 2001-07-07 A heat exchanger with isolated cooling circuits
DE2002130659 DE10230659A1 (en) 2001-07-07 2002-07-02 Heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0116618A GB2377268A (en) 2001-07-07 2001-07-07 A heat exchanger with isolated cooling circuits

Publications (2)

Publication Number Publication Date
GB0116618D0 GB0116618D0 (en) 2001-08-29
GB2377268A true GB2377268A (en) 2003-01-08

Family

ID=9918094

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0116618A Withdrawn GB2377268A (en) 2001-07-07 2001-07-07 A heat exchanger with isolated cooling circuits

Country Status (2)

Country Link
DE (1) DE10230659A1 (en)
GB (1) GB2377268A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1477758A2 (en) * 2003-05-14 2004-11-17 Calsonic Kansei Corporation Multi-function heat exchanger
WO2005001365A1 (en) * 2003-05-30 2005-01-06 Valeo Inc Heat exchanger having an improved baffle
WO2005066563A1 (en) * 2003-12-22 2005-07-21 Modine Manufacturing Company Multi-fluid heat exchanger and method of making same
WO2008064247A1 (en) * 2006-11-22 2008-05-29 Johnson Controls Technology Company Multi-function multichannel heat exchanger
EP2414763A2 (en) * 2009-04-03 2012-02-08 Carrier Corporation Multi-circuit heat exchanger

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1910420B (en) * 2003-12-11 2010-05-12 贝尔两合公司 Heat-exchanging devices system
US7523782B2 (en) * 2004-07-31 2009-04-28 Valeo, Inc. Heat exchanger having a double baffle
DE102008029894B4 (en) 2008-06-24 2018-04-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for stabilizing a motor vehicle when driving through a curve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536116A1 (en) * 1995-09-28 1997-04-03 Behr Gmbh & Co Heat transmitter for road vehicle
FR2785376A1 (en) * 1998-10-29 2000-05-05 Valeo Thermique Moteur Sa Heat exchanger for motor vehicle internal combustion engine has inactive tube in bundle separating manifold into two sections
US6082447A (en) * 1998-11-16 2000-07-04 Norsk Hydro A.S. Heat exchanger member and baffle installation method therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536116A1 (en) * 1995-09-28 1997-04-03 Behr Gmbh & Co Heat transmitter for road vehicle
FR2785376A1 (en) * 1998-10-29 2000-05-05 Valeo Thermique Moteur Sa Heat exchanger for motor vehicle internal combustion engine has inactive tube in bundle separating manifold into two sections
US6082447A (en) * 1998-11-16 2000-07-04 Norsk Hydro A.S. Heat exchanger member and baffle installation method therefor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1477758A2 (en) * 2003-05-14 2004-11-17 Calsonic Kansei Corporation Multi-function heat exchanger
EP1477758A3 (en) * 2003-05-14 2008-02-06 Calsonic Kansei Corporation Multi-function heat exchanger
WO2005001365A1 (en) * 2003-05-30 2005-01-06 Valeo Inc Heat exchanger having an improved baffle
US6942014B2 (en) 2003-05-30 2005-09-13 Valeo, Inc. Heat exchanger having an improved baffle
WO2005066563A1 (en) * 2003-12-22 2005-07-21 Modine Manufacturing Company Multi-fluid heat exchanger and method of making same
GB2422424A (en) * 2003-12-22 2006-07-26 Modine Mfg Co Multi-fluid heat exchanger and method of making same
US7096932B2 (en) 2003-12-22 2006-08-29 Modine Manufacturing Company Multi-fluid heat exchanger and method of making same
WO2008064247A1 (en) * 2006-11-22 2008-05-29 Johnson Controls Technology Company Multi-function multichannel heat exchanger
EP2414763A2 (en) * 2009-04-03 2012-02-08 Carrier Corporation Multi-circuit heat exchanger
EP2414763A4 (en) * 2009-04-03 2014-04-16 Carrier Corp Multi-circuit heat exchanger

Also Published As

Publication number Publication date
GB0116618D0 (en) 2001-08-29
DE10230659A1 (en) 2003-02-06

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