EP3521583A1 - Dispositif de refroidissement doté d'au moins deux circuits de refroidissement et d'une conduite de remplissage refroidie - Google Patents

Dispositif de refroidissement doté d'au moins deux circuits de refroidissement et d'une conduite de remplissage refroidie Download PDF

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Publication number
EP3521583A1
EP3521583A1 EP19152991.6A EP19152991A EP3521583A1 EP 3521583 A1 EP3521583 A1 EP 3521583A1 EP 19152991 A EP19152991 A EP 19152991A EP 3521583 A1 EP3521583 A1 EP 3521583A1
Authority
EP
European Patent Office
Prior art keywords
coolant
cooling
heat exchanger
filling line
cooling circuit
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.)
Granted
Application number
EP19152991.6A
Other languages
German (de)
English (en)
Other versions
EP3521583B1 (fr
Inventor
Ferdinand Stadler
Martin Spiegel
Lisa Dengler
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.)
MAN Truck and Bus SE
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MAN Truck and Bus SE
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 MAN Truck and Bus SE filed Critical MAN Truck and Bus SE
Publication of EP3521583A1 publication Critical patent/EP3521583A1/fr
Application granted granted Critical
Publication of EP3521583B1 publication Critical patent/EP3521583B1/fr
Active legal-status Critical Current
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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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/029—Expansion reservoirs
    • 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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/04—Arrangements of liquid pipes or hoses
    • 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
    • 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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/028—Deaeration devices

Definitions

  • the invention relates to a cooling device with at least two cooling circuits, which are connected to a common reservoir for coolant.
  • the invention relates to a vehicle, preferably a commercial vehicle, and / or a stationary system with such a cooling device.
  • Cooling circuits are used to remove excess heat from self-heating or externally heated components.
  • a coolant e.g. Oil, water or a water-cooling-water additive mixture
  • a coolant cooler e.g. to the ambient air.
  • a plurality of cooling circuits In the field of large-scale installations or in the vehicle sector, it is often possible to provide a plurality of cooling circuits, in particular a plurality of cooling circuits which operate at different temperature levels. For example, it is common in hybrid vehicles to use a high-temperature circuit for cooling the internal combustion engine with a high temperature level of over 90 ° C during normal operation and a low-temperature circuit for cooling the electric drive system with a low temperature level. It is also customary, for example, in vehicles with indirect charge air cooling to use a high-temperature circuit for cooling the internal combustion engine with a high temperature level of more than 90 ° C. during normal operation and a low-temperature circuit for cooling the charge air with a low temperature level.
  • a common reservoir for several operating at different temperature levels cooling circuits provided so mixing of the different temperature coolant can be done in the expansion tank. Warmeres coolant would then be introduced from the common expansion tank in a cooling circuit with a lower temperature level via the corresponding filling line, which could limit its functionality or could lead to damage to the components contained therein.
  • the reservoir to modify so as to avoid mixing of the coolant.
  • the published patent application DE 2 063 298 A1 a common reservoir for a motor vehicle with two separate cooling circuits, which has an absolutely tight partition.
  • two mutually separate regions for receiving coolant are each formed of a cooling circuit and there is no exchange of coolant between the cooling circuits.
  • this approach does not allow pressure equalization between the various cooling circuits and makes it difficult to fill or introduce additives into the coolant, since all components (nozzle, silicate reservoir, etc.) must be designed several times.
  • a basic idea of the invention is to use an air-cooled heat exchanger for cooling the filling line, which achieves a higher cooling capacity due to the higher temperature difference between ambient air and coolant, and to integrate this heat exchanger to save space in existing components of the cooling circuit.
  • a cooling device is provided with at least two cooling circuits, which are each connected via at least one vent line and at least one filling line with a common reservoir for coolant.
  • two of the cooling circuits operate at different temperature levels.
  • An air-cooled heat exchanger is provided on at least one of the filling lines, by means of which coolant is precooled before entry into the cooling circuit associated with this filling line.
  • the air-cooled heat exchanger can be provided at any point of the filling line, preferably in a central region of the filling line. This means that coolant can first enter into a first region of the filling line, then pass through the air-cooled heat exchanger, then flow through a second region of the filling line until it enters the cooling circuit at the end.
  • cooling circuit may in this context be understood to mean that it comprises a system connected via corresponding pipes, hoses or lines comprises a plurality of coolant pumps, coolant radiators and heat exchangers, circulated in the coolant, preferably water, oil or a water-cooling-water additive mixture, driven by the coolant pump almost closed.
  • the existing filling lines, expansion tank and vent lines are not primarily understood as part of the cooling circuit.
  • the cooling circuit takes on the heat exchanger excess heat from self-heating or externally heated components, such as an internal combustion engine, electric motor or a battery, and outputs this means of the coolant radiator to the ambient air.
  • a fluid line e.g. a pipe or hose connection, understood, which connects a cooling circuit, preferably at its geodetically highest point, with the, preferably even higher, expansion tank.
  • gases, vapors, expanding coolant and / or a coolant-air mixture can be transported from the cooling circuit to the expansion tank.
  • the transport of branched coolant mainly takes place in the vent line from the cooling circuit to the expansion tank.
  • the vent line may be made of a plastic, metal or other suitable material.
  • Expansion tanks for coolant are known per se in the prior art and serve on the one hand for venting a cooling circuit. In addition, they can compensate for thermally induced changes in volume of the coolant of a cooling circuit by expanding and thus excess coolant is stored there.
  • an expansion tank can have a coolant reservoir in the form of one or more coolant chambers for receiving the expanding coolant.
  • the surge tank may include an overpressure and / or negative pressure valve for pressure regulation and a filling opening for coolant with an associated cap.
  • the expansion tank may include means for introducing additives into the coolant, for example a silicate depot.
  • a fluid line such as a pipe or hose connection, understood, which leads from the reservoir, preferably from a geodetically underlying area of the surge tank, back to, preferably lower, cooling circuit.
  • the filling line serves to guide accumulated in the expansion tank coolant back into the cooling circuit, whereby the mass transfer takes place in the filling mainly from the expansion tank to the cooling circuit.
  • the filling line can be off a plastic, metal or other suitable material and preferably flows into the cooling circuit fluidly at a point shortly before, ie upstream, the coolant pump.
  • cooling circuits are each connected via at least one vent line and at least one filling line to a common reservoir for coolant.
  • all cooling circuits connected to the common expansion tank operate at almost the same temperature level.
  • filling and venting lines can be present in the cooling device.
  • the exact structural embodiment of the reservoir or the compensation is not relevant to the device according to the invention.
  • the expansion tank can be formed in one piece or in several parts and comprise one or more coolant chambers.
  • the coolant chambers may be in communication with one another through passage openings and thus permit mixing of coolant of the various cooling circuits or be partitioned from each other by dense partition walls, whereby no exchange of coolant between the various cooling circuits can occur in the expansion tank.
  • the invention is particularly advantageous if several different temperature-controlled cooling circuits are connected to a surge tank and there is a mixing of the coolant flows.
  • an air-cooled heat exchanger preferably on the filling line of the cooling circuit with a lower temperature level, provided, the coolant pre-cooled before entering the cooling circuit ,
  • the air-cooled heat exchanger can be embodied in a form known per se in the prior art, wherein the heat extracted from the coolant is released at the end to the ambient air.
  • the air-cooled heat exchanger may be a tube-type cooler or tube cooler.
  • the air-cooled heat exchanger may also include cooling fins and / or heat sink. Since the operating temperature of the cooling circuits in conventional applications, eg in the automotive sector, usually well above the ambient air temperature - for example, the temperature of a cooling circuit of an internal combustion engine in normal operation> 90 ° C - is by the use of air as a heat exchange medium in an advantageous manner, a high temperature difference and thus achieving a high cooling capacity.
  • the air-cooled heat exchanger is formed as a first portion of a coolant radiator, which is separated from a second portion of the coolant radiator. Both the first and the second section have their own inlet and outlet for coolant.
  • the coolant cooler may be formed in a form known per se in the prior art, for example as a downflow or crossflow cooler.
  • the coolant radiator may comprise a plurality of cooling passages or cooling pipes, which are cooled by the passing ambient air.
  • the term separated is understood to mean that the two areas within the coolant radiator are not fluidically connected on the coolant side. That is, there is no exchange of coolant between the two areas within the coolant radiator.
  • the separation can be achieved by means of partitions or barrier ribs.
  • a component coolant radiator thus assume a dual function.
  • a portion of the coolant radiator is used for cooling coolant before it enters the cooling circuit.
  • a portion of the coolant radiator is used for cooling coolant circulating in the cooling circuit.
  • the volumes of the two regions of the coolant radiator outside the coolant radiator can be fluidly connected via corresponding lines or the expansion tank. That is, coolant may first pass through the first portion of the coolant radiator, then enter the cooling circuit and, in the course of the circulation there, reach the second region of the coolant radiator.
  • the coolant radiator in this case comprises a plurality of tubes, preferably flat tubes. Of these tubes, a first subset is assigned to the first subarea and a second subset to the second subarea, wherein the two tube subset are not fluidically connected in the coolant radiator and the first subset is smaller than the second subset.
  • the coolant radiator may be formed as a downflow or crossflow cooler and comprise a brazed radiator network consisting of a plurality of flat tubes and cooling fins. Of these flat tubes, a small subset can be used to cool the refrigerant in the filling line while the remaining flat tubes of the refrigerant cooler are used to cool the refrigerant in the cooling circuit.
  • 10% of the tubes can be used to cool the filling line and the remaining 90% of the tubes to cool the tube in the cooling circuit circulating coolant.
  • the advantage of this embodiment is that a required for the proper functioning of the cooling circuit coolant radiator can be extended without great loss of cooling performance on the claimed double function.
  • the coolant radiator comprises a first cooling section, which is assigned to the first subarea, and a second cooling section, which is assigned to the second subarea, wherein the two cooling sections in the coolant radiator are not fluidically connected and the first cooling section is shorter than the second cooling section.
  • This embodiment is particularly advantageous if it is a heat exchanger with two or more cooling sections or if the coolant radiator comprises meander channels.
  • the first and second cooling sections can also be the same length, which is particularly advantageous if the coolant cooler is a drop-flow or cross-flow cooler.
  • the first subregion of the coolant radiator adjoins the second subregion of the coolant radiator or is arranged adjacently.
  • the first and second subregions may be in direct mechanical contact with each other, i. abut each other and thus be understood as a quasi one component.
  • the two areas can only be separated from each other via a partition wall.
  • the inlet of the first portion of the coolant radiator coolant is supplied from the surge tank via the filling line of the associated cooling circuit.
  • coolant from the surge tank first passes through the fill line and then enters via the inlet into the air-cooled heat exchanger, which is designed as a first portion of a coolant radiator.
  • the air-cooled heat exchanger By passing through the heat exchanger, respectively, the first portion of the coolant radiator, a cooling of the coolant, which then enters after exiting the heat exchanger in the cooling circuit, whereby it can pass before another route in the filling line.
  • the outlet of the first portion of the coolant radiator is upstream of the inlet of the second portion of the coolant radiator. That is, in normal operation, coolant flows from the outlet of the first portion of the coolant radiator to Inlet of the second portion of the coolant radiator, wherein the coolant in the meantime, other components, such as a coolant pump or the components to be cooled, flow through or can flow along.
  • the inlet and / or outlet of the heat exchanger is designed as a hose nozzle or hose coupling.
  • the opening for supplying the coolant into the heat exchanger is understood to be the inlet
  • the outlet is understood to be the opening for the escape of the coolant from the heat exchanger.
  • the heat exchanger may also include more than one inlet and more than one outlet.
  • the inlet and / or outlet of the heat exchanger can also comprise a pipe coupling and / or flange connection.
  • the air-cooled heat exchanger is designed as a separate component, which is provided only for cooling the coolant in the filling line. That the heat exchanger is explicitly not designed as part of a coolant radiator.
  • the heat exchanger can be designed as an air-cooled tube bundle cooler, tube cooler or heat exchanger.
  • the heat exchanger may comprise cooling ribs and / or heat sinks.
  • this embodiment is characterized in that downstream of the filling line, a coolant radiator of the associated cooling circuit is arranged downstream of the filling line.
  • the coolant passes in the filling line on its way from the expansion tank to the entry into the cooling circuit first at one point an air-cooled heat exchanger and then in the cooling circuit a coolant radiator, which is not identical to the aforementioned air-cooled heat exchanger.
  • the advantage of this variant is that due to the spatial separation of heat exchanger and coolant radiator no heat transfer between the two components can occur.
  • the embodiment of the heat exchanger and coolant radiator as a directly in contact assembly thus an undesirable heat flow of the first when entering the heat exchanger still warm coolant over theticianübertrager- anddeffenerwand the cold cooling circuit is effectively prevented.
  • exactly two cooling circuits operating at different temperature levels are connected in each case via at least one ventilation line and at least one filling line to a common reservoir for coolant.
  • the air-cooled heat exchanger is provided on the filling line of the cooling circuit with a lower temperature level to pre-cool coolant from the common expansion tank before entering the cooling circuit with a lower temperature level.
  • introduction of hot coolant is prevented in the cooling circuit with a lower temperature level.
  • the invention further relates to a motor vehicle, preferably a commercial vehicle, with a cooling device, as described in this document.
  • the cooling device can be used for fuel, oil, intercooler, engine and / or battery cooling.
  • the motor vehicle may include an internal combustion engine and / or electric motor and / or a fuel cell.
  • the invention relates to a stationary plant with a cooling device, as described in this document.
  • the stationary system may also include an internal combustion engine and / or electric motor and / or a fuel cell.
  • FIG. 1 schematically an exemplary embodiment of the claimed cooling device 100 is shown.
  • This comprises two cooling circuits 10a, 10b, each of which via a vent line 1a, 1b and a filling line 2a, 2b with a, designed as a chamber, common reservoir 3 are connected for coolant.
  • the two cooling circuits 10a and 10b have no further flow connection to one another.
  • the individual cooling circuits 10a and 10b shown here greatly reduced for the sake of clarity here comprise in each case a coolant cooler 5a, 5b, a coolant pump 8a, 8b and a heat exchanger 9a, 9b, these components being connected via corresponding pipes 11a, 11b.
  • the coolant pumps 8a, 8b pump coolant to the heat exchangers 9a, 9b, which are in contact with self-heating or externally heated components, such as an internal combustion engine.
  • the pipes 11a, 11b lead in a conventional manner to the components to be cooled, for example engine components, or are passed through them (not shown).
  • heat exchangers 9a, 9b heat is transferred from these components to the coolant, which is then pumped on to the respective coolant coolers 5a, 5b, eg a downflow cooler.
  • the coolant coolers 5a, 5b the heat stored in the coolant is finally released into the ambient air. After that, the coolant flows again to the respective coolant pumps 8a, 8b and the cycle starts again.
  • the cooling circuit 10a thereby has a lower operating temperature T 1 than the cooling circuit 10b, whereby in the expansion tank 3 also a mixing temperature of the coolant therein is set, which is between the operating temperatures of the two cooling circuits 10a and 10b. Due to this mixing of the coolant in the expansion tank 3, consequently, the cooling circuit 10a with a lower temperature level would be returned to "too warm" coolant via the filling line 2a.
  • an air-cooled heat exchanger 4 is provided in the region of the filling line 2a of the cooling circuit 10a with a lower temperature level. This is formed as a first portion 51 of a coolant radiator 5a, which is separated from a second portion 52 of the coolant radiator 5a. In this case, both the first and the second portion 51, 52 have their own inlet 61, 62 and outlet 71, 72 for coolant. In a space-saving manner, a pre-cooling of the over the filling line 2 a in the cooling circuit 10 a and thus achieved due to the previous mixing in the expansion tank 3 "too warm" coolant is thus achieved.
  • FIG. 2 shows an embodiment of the air-cooled heat exchanger 4 for pre-cooling the filling line 2a as a first portion 51 of a coolant radiator 5a.
  • the coolant radiator 5a which is known per se in the prior art, for example in the form of a downflow cooler, is subdivided into partial sections 51 and 52 which are separated from one another, ie not fluidically connected within the coolant radiator 5a, via a vertical partition wall 12.
  • each of the two subregions 51 and 52 flows through coolant, which enters the respective subregion 51, 52 via the corresponding inlet 61, 62 and leaves the respective subregion 51, 52 via the corresponding outlet 71, 72, without intermingling therebetween can take place of coolant of the two circuits.
  • FIG. 3 an embodiment of the invention is shown in which the air-cooled heat exchanger 4 is designed as a separate component 40 for pre-cooling of the filling line 2a.
  • the air-cooled heat exchanger 4 is designed as a separate component 40 for pre-cooling of the filling line 2a.
  • a coolant cooler 5a In the cooling circuit 10a itself, however, a coolant radiator 5a is present, which, however, only serves to cool the coolant in the cooling circuit 10a, while the air-cooled heat exchanger 4, the coolant in the filling line 2a before it enters the cooling circuit 10a precooled.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
EP19152991.6A 2018-02-01 2019-01-22 Dispositif de refroidissement doté d'au moins deux circuits de refroidissement et d'une conduite de remplissage refroidie Active EP3521583B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018102258.1A DE102018102258A1 (de) 2018-02-01 2018-02-01 Kühlvorrichtung mit mindestens zwei Kühlkreisläufen und einer gekühlten Füllleitung

Publications (2)

Publication Number Publication Date
EP3521583A1 true EP3521583A1 (fr) 2019-08-07
EP3521583B1 EP3521583B1 (fr) 2021-09-01

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EP19152991.6A Active EP3521583B1 (fr) 2018-02-01 2019-01-22 Dispositif de refroidissement doté d'au moins deux circuits de refroidissement et d'une conduite de remplissage refroidie

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EP (1) EP3521583B1 (fr)
DE (1) DE102018102258A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE2050583A1 (en) * 2020-05-19 2021-11-20 Scania Cv Ab Cooling system and vehicle comprising such a cooling system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022117844A1 (de) 2022-07-18 2024-01-18 Man Truck & Bus Se Kraftfahrzeug aufweisend Temperiervorrichtung

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DE19912138A1 (de) * 1999-03-18 2000-09-28 Daimler Chrysler Ag Kühlanlage für eine Brennkraftmaschine
WO2003042516A2 (fr) * 2001-11-13 2003-05-22 Valeo Thermique Moteur Systeme de gestion de l'energie thermique d'un moteur thermique comprenant deux reseaux
DE102007052927A1 (de) * 2007-11-07 2009-05-14 Daimler Ag Kühlmittelkreislauf für eine Brennkraftmaschine
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DE102015212554A1 (de) * 2015-07-06 2017-01-12 Bayerische Motoren Werke Aktiengesellschaft Kraftfahrzeug mit wenigstens einem Kühlmittelkreislauf

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Publication number Priority date Publication date Assignee Title
DE19912138A1 (de) * 1999-03-18 2000-09-28 Daimler Chrysler Ag Kühlanlage für eine Brennkraftmaschine
WO2003042516A2 (fr) * 2001-11-13 2003-05-22 Valeo Thermique Moteur Systeme de gestion de l'energie thermique d'un moteur thermique comprenant deux reseaux
DE102007052927A1 (de) * 2007-11-07 2009-05-14 Daimler Ag Kühlmittelkreislauf für eine Brennkraftmaschine
DE102007054855A1 (de) * 2007-11-16 2009-05-28 Bayerische Motoren Werke Aktiengesellschaft Ausgleichsbehälter für wenigstens zwei Wärmeübertragungsmittelkreisläufe, Wärmeübertragungsmittelkreislauf sowie Kraftfahrzeug
DE102015212554A1 (de) * 2015-07-06 2017-01-12 Bayerische Motoren Werke Aktiengesellschaft Kraftfahrzeug mit wenigstens einem Kühlmittelkreislauf

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE2050583A1 (en) * 2020-05-19 2021-11-20 Scania Cv Ab Cooling system and vehicle comprising such a cooling system
WO2021235990A1 (fr) * 2020-05-19 2021-11-25 Scania Cv Ab Système de refroidissement et véhicule comprenant un tel système de refroidissement
SE544139C2 (en) * 2020-05-19 2022-01-11 Scania Cv Ab Cooling system and vehicle comprising such a cooling system
US11732636B2 (en) 2020-05-19 2023-08-22 Scania Cv Ab Cooling system and vehicle comprising such a cooling system

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EP3521583B1 (fr) 2021-09-01
DE102018102258A1 (de) 2019-08-01

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