EP1819910B1 - Niedrigtemperatur-ausrüstungskühlsystem für einen teil einer motorfahrzeugausrüstung und damit verbundene wärmetauscher - Google Patents

Niedrigtemperatur-ausrüstungskühlsystem für einen teil einer motorfahrzeugausrüstung und damit verbundene wärmetauscher Download PDF

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Publication number
EP1819910B1
EP1819910B1 EP05807630.8A EP05807630A EP1819910B1 EP 1819910 B1 EP1819910 B1 EP 1819910B1 EP 05807630 A EP05807630 A EP 05807630A EP 1819910 B1 EP1819910 B1 EP 1819910B1
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EP
European Patent Office
Prior art keywords
heat
temperature
equipment
low
transfer fluid
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.)
Not-in-force
Application number
EP05807630.8A
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English (en)
French (fr)
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EP1819910A1 (de
Inventor
Ngy-Sun Ap
Pascal Guerrero
Philippe Jouanny
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.)
Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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Publication of EP1819910A1 publication Critical patent/EP1819910A1/de
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Classifications

    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • 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
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • 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
    • F28D1/0417—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with particular circuits for the same heat exchange medium, e.g. with the heat exchange medium flowing through sections having different heat exchange capacities or for heating/cooling the heat exchange medium at different temperatures
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P2005/105—Using two or more pumps
    • 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
    • F01P2060/02—Intercooler
    • 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
    • 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
    • F01P2060/08—Cabin heater
    • 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

Definitions

  • the invention relates to a low-temperature cooling system of at least one equipment, in particular a motor vehicle equipment, comprising at least a first and a second heat-transfer fluid circulation loop on which a low-temperature heat exchanger is mounted. and at least a first and a second equipment exchanger respectively provided on each of the loops.
  • Some of these equipment do not need to be cooled to a low temperature. They can therefore be placed without inconvenience on the cooling circuit of the engine of the vehicle in which circulates a heat transfer fluid whose temperature is generally between 85 ° C and 100 ° C.
  • other equipment must operate at as low a temperature as possible to improve their efficiency. This is particularly the case condenser of the air conditioning circuit and the charge air cooler.
  • the low temperature cooling circuit is equipped with a low temperature heat exchanger which has a single inlet manifold and a single outlet manifold, the circulation of heat transfer fluid one or more passes.
  • the low temperature heat exchanger delivers only one temperature level and the fluid to be cooled, for example the air of the charge air cooler, is at a single heat exchange level.
  • the refrigerant is condensed by the ambient air, but it is possible, using a low temperature circuit, to condense with the same heat transfer fluid as the cooling of the fitter.
  • the cooling of these fluids is therefore frequently insufficient to guarantee an optimum temperature lowering.
  • the temperature of the charge air is too high towards the intake on the critical points in the event of heavy load of the engine or the condensing refrigerant is insufficient, which results in degraded performance of the air conditioning circuit.
  • the present invention relates to a low temperature cooling system of at least one motor vehicle equipment that overcomes these disadvantages.
  • first heat exchanger is crossed by a first coolant flow
  • second equipment heat exchanger is traversed by a second flow of coolant, the first flow being greater than the second flow.
  • the fluid to be cooled is cooled. according to at least two levels of heat exchange. Of course, it can also be cooled according to more than two levels of heat exchange.
  • the two equipment exchangers are independent. In other words, they do not define the same exchanger having an exchange surface divided into a first exchange section and a second exchange section, crossed by different flow rates.
  • the sum of the heat transfer fluid flows entering the equipment exchangers is, for example, equal to the output flow of the cooling radiator.
  • said equipment exchangers are, for example, crossed in series by the fluid to be treated, said fluid to be processed leaving the first equipment exchanger to enter the second equipment exchanger via of flow ducts.
  • Flow conduit means any type of conduit excluding filtration and dewatering tank components.
  • the fluid to be treated is different in the first and the second equipment exchanger.
  • This cooling system is advantageously applied to air conditioning circuit condensers operating in series with respect to the refrigerant to be treated.
  • the low temperature heat exchanger can deliver only one temperature level. In this case, it has a single outlet tubing.
  • the low temperature heat exchanger comprises at least a first and a second heat transfer fluid outlet pipe, the first pipe being connected to the first heat exchanger of equipment, the second pipe of heat transfer fluid outlet being connected to the second equipment heat exchanger, the coolant leaving the heat exchanger at low temperature by the first pipe being at a temperature higher than that of the fluid leaving the heat exchanger at low temperature through the second tubing.
  • the temperature of the coolant is lower in the second equipment heat exchanger, which allows to further cool the fluid flowing through the exchanger.
  • the low-temperature heat exchanger comprises a multiplicity of fluid circulation passes successively traversed by the heat transfer fluid, the first pipe being disposed upstream of the second pipe with respect to the circulation of the heat transfer fluid in the pipes. successive passes.
  • the heat transfer fluid taken by the first pipe is at a temperature higher than the heat transfer fluid taken by the second pipe.
  • the flow rates are decreasing.
  • the flow rate taken by the first pipe is higher than the flow taken by the second pipe which is itself higher than the flow taken by the third pipe, etc..
  • the figure 1 is an overview of a thermal energy management system released by a motor vehicle engine, which comprises a high temperature loop, designated by the general reference 2 and two low temperature loops designated by the reference general 4 and 4 ', loops 2 and 4; 4 'being independent.
  • the high temperature loop 2 comprises the motor 10, a circulation pump 12 for circulating the coolant in the circuit, a thermostat or a thermostatic valve (not shown) and a high temperature radiator 18 which is the main radiator of the vehicle .
  • the high temperature loop also comprises a heating branch 22 on which is mounted a heater 24 used for heating the passenger compartment of the vehicle.
  • equipment that does not need to be cooled to a very low temperature for example an oil cooler 34 or an exhaust gas cooler 38 are mounted on a branch 32.
  • the flow rate of heat transfer fluid circulating in the high temperature loop 2 is approximately ten times greater than the flow rate that circulates in the low temperature loops 4, 4 '.
  • the flow rate that flows in the high temperature radiator 18 can be 5000 to 10,000 liters per hour, while the flow rate flowing in the low temperature radiator 60 is between 0 and 1000 liters / hour. .
  • the low temperature radiator 60 includes an inlet manifold 72 and an outlet manifold 74.
  • An inlet manifold 76 is connected to the inlet manifold 72 and an outlet manifold 78 is connected to the manifold 74.
  • a bundle of tubes 80 is arranged between the inlet 72 and outlet manifolds 74.
  • the inlet manifold 72 is divided in two by a transverse partition 82, and, of the same In this way, the outlet manifold 74 is divided in two by a transverse partition 84. Three passes 86, 88 and 90 are thus defined for the circulation of the coolant.
  • the heat transfer fluid After entering the collecting box 72, the heat transfer fluid first travels the pass 86, as shown schematically by the arrows 92, then the pass 88 as shown schematically by the arrow 94 and finally the pass 90 as shown schematically by the arrow 96.
  • the cooling system also comprises a first and a second equipment exchanger 104, 106, for example a charge air cooler or an air conditioning circuit condenser.
  • the first heat exchanger 104 allows the passage of a flow rate of fluid Q1 greater than the flow rate Q2 passing through the second exchanger 106.
  • the fluid circulation loops comprise a common branch 108 situated downstream of the equipment exchangers in which the heat transfer fluid circulates in the direction defined by the arrow 110 under the impulsion of a circulation pump 112, for example a pump electric.
  • the fluid circulation loops also comprise two branches 114 and 116, upstream of the equipment exchangers, in which the fluid circulates in the direction defined by the arrows 118.
  • the fluid to be cooled for example the air of the charge air cooler or the refrigerant of the air-conditioning circuit, first passes through the first heat exchanger 104 and then the second heat exchanger. 106.
  • the fluid to be cooled is cooled according to two heat exchange levels.
  • the through-flow fluid can be treated in series with the two exchangers in two different stages.
  • the low-temperature radiator 60 has two outlet pipes, namely a pipe 78, as before, and a second pipe 132.
  • the pipe 132 takes the heat transfer fluid at the first flow passage of fluid (arrows 92), while the second tubing 78 draws the fluid at the last fluid flow pass (arrow 96).
  • the coolant that has passed through a single pass of the low temperature heat exchanger 60 exits through the outlet pipe 132 at a temperature greater than that of the heat transfer fluid which has passed successively through the three passes of the heat exchanger 60 and which exits through the tubing 78.
  • the low temperature cooling radiator 60 thus delivers two temperature levels.
  • the fluid of the first temperature level enters the first heat exchanger 104 through a pipe 134, while the fluid of the second (lower) temperature level enters the second heat exchanger 106 via a pipe 136.
  • the distribution of the losses circuit charging, including outlet pipes 78 and 132 is such that the flow Q1 through the first exchanger 104 is greater than the flow Q2 through the second exchanger 106.
  • a system of this type may allow the fluid to be cooled to a much lower temperature than a system delivering only one temperature level.
  • the heat transfer fluid exits the first pass at a temperature between 40 ° C and 60 ° C.
  • the second pass 94 its temperature is between 30 ° C and 50 ° C and finally, after the third pass 90, its temperature drops to about 20 ° C to 40 ° C.
  • the coolant entering the first heat exchanger 104 therefore has an average temperature of about 50 ° C, while the fluid entering the second heat exchanger 106 has a temperature of about 30 ° C.
  • the fluid to be cooled transfers most of its heat into the first heat exchanger 104 before being placed in heat exchange relation with a fluid coolant at the much lower temperature that lowers its outlet temperature.
  • This cooling system is advantageously applied to an air conditioning circuit condenser because it allows, in the first heat exchanger 104, to carry out the condensation of the refrigerant and to ensure that this fluid is sub-cooled in the process.
  • second heat exchanger 106 is advantageously applied to an air conditioning circuit condenser because it allows, in the first heat exchanger 104, to carry out the condensation of the refrigerant and to ensure that this fluid is sub-cooled in the process.
  • the low temperature cooling radiator 60 has four passes.
  • the inlet manifold 72 has two transverse partition walls 142 and 146, while the outlet manifold 74 has a single partition wall 144.
  • the partition walls 142, 144 and 146 thus determine four paths and return of the coolant in the tubes of the heat exchanger at low temperature 60.
  • An outlet pipe 141 draws the fluid after passing through the third pass. This fluid is fed, as in the previous example, to the first heat exchanger 104 through the pipe 134 of the first loop. An outlet pipe 143 withdraws the coolant after passing through the fourth and last pass of the low-temperature heat exchanger 60. This fluid is fed through a pipe 144 of the second loop to the second heat exchanger 106. Thus, as before, the fluid passing through the second heat exchanger 106 is at a lower temperature than the fluid flowing through the first heat exchanger 104.
  • a pipe 150 can take the fluid directly to the engine outlet.
  • a pipe 152 is connected to the engine inlet of the vehicle.
  • the temperature of the fluid is higher than in the previous cases.
  • the coolant enters the inlet manifold at a temperature of about 90 ° C. It emerges from the outlet pipe 141 at a temperature of about 60 ° C and through the outlet pipe 143 at a temperature of about 40 ° C. It is found, therefore, that, despite a high inlet temperature, the coolant can be cooled to a relatively low temperature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Claims (6)

  1. System zum Kühlen mindestens einer Ausrüstung, insbesondere einer Kraftfahrzeug-Ausrüstung, auf niedrige Temperatur, das mindestens eine erste (4) und eine zweite (4') Wärmeträgerfluid-Umwälzschleife enthält, auf denen ein Niedertemperatur-Wärmetauscher (60) und mindestens ein erster (104) und ein zweiter (106) Ausrüstungs-Wärmetauscher montiert sind, welche jeweils auf jeder Umwälzschleife vorgesehen sind, wobei der erste Ausrüstungs-Wärmetauscher (104) von einer ersten Durchflussmenge (Q1) von Wärmeträgerfluid durchquert wird, wobei der zweite Ausrüstungs-Wärmetauscher (106) von einer zweiten Durchflussmenge (Q2) von Wärmeträgerfluid durchquert wird, dadurch gekennzeichnet, dass die erste Durchflussmenge (Q1) größer ist als die zweite Durchflussmenge (Q2), und dass der Niedertemperatur-Wärmetauscher (60) mindestens einen ersten und einen zweiten Ausgangsanschlussstutzen (78, 132, 141, 143) des Wärmeträgerfluids aufweist, wobei der erste Anschlussstutzen an den ersten Wärmetauscher (104) angeschlossen ist, der zweite Anschlussstutzen an den zweiten Wärmetauscher (106) angeschlossen ist, wobei das durch den ersten Anschlussstutzen aus dem Niedertemperatur-Tauscher (60) austretende Wärmeträgerfluid auf einer höheren Temperatur ist als das durch den zweiten Ausgangsanschlussstutzen aus dem Niedertemperatur-Wärmetauscher austretende Wärmeträgerfluid.
  2. Kühlsystem nach Anspruch 1, dadurch gekennzeichnet, dass der Niedertemperatur-Wärmetauscher (60) eine Vielzahl von Fluidumwälzdurchläufen (86, 88, 90) aufweist, die nacheinander von dem Wärmeträgerfluid durchquert werden, wobei der erste Anschlussstutzen bezüglich der Umwälzung des Wärmeträgerfluids in den Durchläufen (86, 88, 90) vor dem zweiten Anschlussstutzen angeordnet ist.
  3. Kühlsystem nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die erste und die zweite Niedertemperatur-Umwälzschleife stromabwärts der Ausrüstungs-Wärmetauscher einen gemeinsamen Teil (108) aufweisen und der gemeinsame Teil (108) eine Umwälzpumpe (58) aufweist.
  4. Kühlsystem nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die Niedertemperatur-Umwälzschleifen in Ableitung zwischen dem Eingang und dem Ausgang des Kühlkreislaufs des Verbrennungsmotors des Kraftfahrzeugs montiert sind.
  5. Kühlsystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Ausrüstungs-Wärmetauscher (104; 106) Aufladeluftkühler sind, wobei die Aufladeluft in Reihe in die Wärmetauscher einströmt.
  6. Kühlsystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Ausrüstungs-Wärmetauscher (104; 106) Kondensatoren sind, die Teil des Klimatisierungskreislaufs des Innenraums des Kraftfahrzeugs sind, wobei die Klimatisierungskreislaufflüssigkeit in Reihe in die Wärmtauscher einfließt.
EP05807630.8A 2004-09-23 2005-09-23 Niedrigtemperatur-ausrüstungskühlsystem für einen teil einer motorfahrzeugausrüstung und damit verbundene wärmetauscher Not-in-force EP1819910B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0410080A FR2875590B1 (fr) 2004-09-23 2004-09-23 Systeme de refroidissement a basse temperature d'un equipement, notamment d'un equipement de vehicule automobile, et echangeurs de chaleur associes
PCT/FR2005/002370 WO2006032798A1 (fr) 2004-09-23 2005-09-23 Système de refroidissement à basse température d'un équipe ment, notamment d'un équipement de véhicule automobile, et échangeurs de chaleur associés

Publications (2)

Publication Number Publication Date
EP1819910A1 EP1819910A1 (de) 2007-08-22
EP1819910B1 true EP1819910B1 (de) 2014-08-27

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EP05807630.8A Not-in-force EP1819910B1 (de) 2004-09-23 2005-09-23 Niedrigtemperatur-ausrüstungskühlsystem für einen teil einer motorfahrzeugausrüstung und damit verbundene wärmetauscher

Country Status (3)

Country Link
EP (1) EP1819910B1 (de)
FR (1) FR2875590B1 (de)
WO (1) WO2006032798A1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3422036B2 (ja) * 1992-07-13 2003-06-30 株式会社デンソー 車両用冷却装置
FR2748428B1 (fr) * 1996-05-07 1998-06-19 Renault Systeme de refroidissement pour vehicule a propulsion hybride
FR2815401A1 (fr) * 2000-10-13 2002-04-19 Renault Dispositif, systeme et procede de refroidissement d'un fluide caloporteur
FR2852678B1 (fr) * 2003-03-21 2005-07-15 Valeo Thermique Moteur Sa Systeme de refroidissement a basse temperature d'un equipement, notamment d'un equipement de vehicule automobile, et echangeurs de chaleur associes

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WO2006032798A1 (fr) 2006-03-30
FR2875590A1 (fr) 2006-03-24
FR2875590B1 (fr) 2007-03-02
EP1819910A1 (de) 2007-08-22

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