EP1499795A2 - Heat energy management system comprising two networks - Google Patents

Heat energy management system comprising two networks

Info

Publication number
EP1499795A2
EP1499795A2 EP02793225A EP02793225A EP1499795A2 EP 1499795 A2 EP1499795 A2 EP 1499795A2 EP 02793225 A EP02793225 A EP 02793225A EP 02793225 A EP02793225 A EP 02793225A EP 1499795 A2 EP1499795 A2 EP 1499795A2
Authority
EP
European Patent Office
Prior art keywords
main
network
radiator
heat
pipe
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Withdrawn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
EP02793225A
Other languages
German (de)
French (fr)
Inventor
Ngy Srun 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 Thermique Moteur SA
Original Assignee
Valeo Thermique Moteur SA
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 Valeo Thermique Moteur SA filed Critical Valeo Thermique Moteur SA
Publication of EP1499795A2 publication Critical patent/EP1499795A2/en
Withdrawn legal-status Critical Current

Links

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
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
    • 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
    • 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
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • F01P2005/125—Driving auxiliary pumps electrically
    • 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
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/32—Engine outcoming fluid temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/36—Heat exchanger mixed fluid temperature
    • 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

  • Thermal energy management system of a heat engine comprising two networks
  • the invention relates to a thermal energy management system developed by a thermal engine of a motor vehicle, comprising a main network including a main pump for circulating a coolant cycle fluid between the vehicle engine and a main radiator exchanging heat. heat with outside atmospheric air.
  • Motor vehicles include an engine cooling system that keeps the engine at an optimal operating temperature.
  • This circuit includes a cooling radiator placed at the front of the vehicle and traversed by an air flow to evacuate the heat from the coolant cycle fluid which cools the engine.
  • the engine cooling circuit is also used to heat the passenger compartment of the vehicle by means of an air heater through which the same coolant cycle fluid flows.
  • the present invention relates to a system for managing the thermal energy of a thermal engine of a motor vehicle which overcomes these drawbacks.
  • the purpose of this system is to reduce the number of components and, consequently, the space taken up under the engine hood, as well as the cost price of the assembly.
  • the thermal energy management system further comprises a secondary network in which the same coolant cycle fluid circulates as in the main network, this secondary network.
  • this secondary network including a secondary radiator and a secondary pump, the main network and the secondary network having a common expansion tank.
  • the thermal energy management system uses a single fluid, namely the cycle fluid which cools the vehicle's thermal engine.
  • the engine coolant acts as a cold source to cool or heat all other fluids (air intake, exhaust gas, air conditioning fluid, engine and / or gearbox lubricating oil, fuel, etc.) that require it. Only the engine coolant exchanges heat with the ambient air.
  • the system includes a single expansion tank which is used for all equipment in the vehicle. The number of components, and therefore their size, is greatly reduced. Said expansion tank also allows the common filling of the two networks.
  • the expansion tank may have no interior partitions.
  • the common expansion vessel ensures the passage of cycle fluid from one network to another.
  • the common expansion vessel includes a partition for total or partial separation. In the latter case, said partition exceeds the ordinary level of the cycle fluid in the expansion tank.
  • Such a partition makes it possible to avoid the transmission of shock waves which can propagate in one of the networks to the other network.
  • the two networks are in principle separate, but the possibility of a circulation of fluid from one network to another is preserved by overflowing above the partition.
  • the partition of the expansion tank is pierced with a restriction.
  • This restriction allows communication from one network to another, but this communication is limited by the passage section of the restriction.
  • Such a restriction facilitates the filling of each of the parts of the expansion tank. She is advantageously located in the lower half of the partition.
  • the main network includes a four-way valve, a first way being connected to the outlet of the main radiator, a second way being connected to the outlet of the engine cooling circuit, a third way being connected to the inlet of the pump main and a fourth channel at the exit of one heater;
  • the system includes a control device which receives information on the temperature of the fluid at different points of the main network and of the secondary network in order to control the four-way valve;
  • control unit also controls the starting and stopping of the secondary pump
  • the main network comprises an engine pipeline on which the main pump and the heat engine are mounted, a heating pipe on which the air heater is mounted, a main radiator pipe on which the main radiator is mounted, a short circuit, the engine line, the heating line, the main radiator line and the short circuit line being connected in parallel;
  • the motor vehicle comprises one or more pieces of equipment in heat exchange relation with the environment which is external to them by means of an equipment heat exchanger, the equipment heat exchanger (s) being integrated into the main network and / or to the secondary network, each heat exchanger being in a heat exchange relationship with the coolant cycle fluid.
  • FIG. 1 is a schematic general view of a thermal energy management system according to the present invention
  • FIG. 2 is a schematic sectional view of a first variant of a common expansion tank for a thermal energy management system according to the invention
  • FIG. 3 is a second alternative embodiment of an expansion tank
  • FIG. 4 is a third alternative embodiment of an expansion tank.
  • the thermal energy management system developed by a thermal engine of the invention shown in Figure 1 consists of a main network designated by the general reference 2 and a secondary network designated by the general reference 4.
  • the main network 2 comprises a heat engine pipe 8 on which is mounted a heat engine 10.
  • a main pump 12 circulates a heat transfer fluid in the engine cooling circuit 10, as shown schematically by the arrows 14.
  • the main network also includes a radiator pipe 16 on which a main radiator 18 is mounted.
  • a short-circuit pipe 20 is mounted in parallel with the radiator pipe 16.
  • the fluid which is used to cool the heat engine 10 is also used to heat the vehicle interior. To this end, it circulates by means of a heating pipe 22 in a heating or air heater 24 mounted on the pipe 22.
  • a four-way valve 70 regulates the temperature of the engine, for example around a set temperature of 100 °.
  • a first channel 70 ⁇ of the valve 70 is connected to the radiator pipe 16, a second channel 70 2 is connected to the short-circuit line 20, a third channel 70 3 is connected to the motor line 8 and a fourth channel 70 4 is connected to the heating line 22.
  • the main network can also optionally include additional equipment such as an engine lubricating oil cooler 26 mounted on an equipment pipe 28.
  • the secondary network 4 comprises a closed loop 30 on which is mounted a secondary radiator 32.
  • An electric circulation pump 34 ensures the circulation of the coolant cycle fluid in the loop 30 and, consequently, in the secondary radiator 32.
  • optional equipment exchangers can be mounted on the cooling loop 30.
  • the vehicle is equipped with an air conditioning circuit for the passenger compartment of the motor vehicle.
  • the condenser 36 of the air conditioning circuit is mounted on the loop 30 so as to be cooled by the coolant cycle fluid which leaves the secondary radiator 32.
  • a monitoring device 40 receives a temperature signal from a probe 42 installed at the outlet of the cooling circuit of the heat engine 10 and also from a probe 44 installed at the outlet of the secondary radiator 32.
  • the monitoring device 40 uses this information to control the operation of the four-way valve 70.
  • This valve regulates the temperature of the motor and manages the short-circuit 20, air heater 22, main radiator 16 and equipment pipe 28 tracks.
  • the four-way valve 70 thus replaces the thermostatic valve usually used in conventional systems. For example, if it is necessary to heat the passenger compartment of the vehicle, the heating pipe 22 on which the air heater 24 is mounted is open. Otherwise, this pipe is closed.
  • the control device 40 also controls the operation of the pump 34 of the secondary network 4.
  • the main radiator 18 is connected to an expansion tank 50 by a pipe 52.
  • the pipe 52 is also connected to the engine pipe 8 by a branch 54.
  • the secondary radiator 32 is connected to the expansion 50 by a pipe 56.
  • the expansion tank 50 is thus common to the main network 2 and to the secondary network 4. When the temperature of the fluid increases, the latter expands and the excess volume is received in the expansion tank. Conversely, when the fluid cools, or when a loss of liquid occurs as a result of a leak, a quantity of heat transfer fluid can be admitted into the main network by a pipe 58 and into the secondary network by a line 60.
  • the main radiator 18 and the secondary radiator 32 can be produced in the form of two separate exchangers. They can also be placed one in front of the other to form an exchange module having a reduced bulk.
  • the secondary radiator 32 will preferably be placed in front of the main radiator 18.
  • the secondary radiator will see the air first. In other words, it will be the first to be cooled by the outside air flow.
  • the main radiator which will be cooled by the air flow which has already passed through the secondary radiator will advantageously be cooled.
  • the secondary network 4 will constitute a low temperature network relative to the main network 2 which will constitute a high temperature network.
  • the main radiator 18 or high temperature radiator and the secondary radiator 32 or low temperature radiator can also be part of a so-called Amultifunction ⁇ exchanger, that is to say of a heat exchange module in which the two exchangers are superimposed so as to be traversed by the same air flow, a high temperature radiator outlet manifold 18 communicating with a low temperature radiator inlet manifold 32 by a passage orifice (not shown ) valve means making it possible to open or close this passage orifice.
  • the expansion tank 50 therefore has two inlets, namely an inlet 62 for the fluid of the main network 2 and an inlet 64 for the heat transfer fluid of the secondary network 4.
  • the expansion tank 50 also has two outlets, namely a output 66 to the main network 2 and an output 68 to the secondary network 4.
  • the inputs and / or outputs can also be common, as illustrated in Figure 2 in dotted lines for outputs 66 and 68.
  • FIG. 2 shows a first alternative embodiment of the expansion tank 50 common to the main network 2 and to the secondary network 4.
  • This expansion tank has an inlet 62 connected to the main network 2 and an inlet 64 connected to the network secondary 4. It also includes an outlet 66 connected to the main network 2 and an outlet 68 connected to the secondary network 4.
  • the level of the heat transfer fluid in the expansion tank 50 has been designated by the reference 67.
  • the thermal energy management system therefore uses a single fluid, which is a difference compared to other systems that use a different fluid for each piece of equipment to be cooled.
  • This feature also allows for different configurations, depending on the engine load. In case of low load, the high temperature radiator 18 can be used to cool equipment such as the air conditioning condenser, a charge air cooler or even an exhaust gas cooler. Conversely, in the event of strong • or very heavy load of the engine, the low temperature radiator can be used to complete the cooling of the heat engine 10.
  • FIG. 3 a second alternative embodiment of the common expansion tank 50. It comprises a partition 69 which divides it into two separate parts. Thus, the main network 2 and the secondary network 4 do not communicate with each other and, in principle, no exchange of fluid is established between these two circuits, unless the level 67 of the fluid passes through above the partition 69.
  • FIG. 4 shows a third alternative embodiment of the common expansion tank 50.
  • the partition 69 is pierced by a calibrated orifice 71 which ensures a limited passage of the heat transfer fluid through the partition 69, that is to say from one network to another.
  • a circulation of fluid can be established from one network to the other, as in the case of the embodiment of FIG. 2.
  • this circulation is limited by the dimension of the calibrated orifice 71.
  • Said calibrated orifice may be replaced by a thermostatic valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The invention concerns a system for managing the heat energy produced by a motor vehicle heat engine (10) comprising a main network (2) including a main pump (12) for circulating a cycle coolant between the heat engine and the main radiator (18) exchanging heat with outside ambient air. It further comprises a secondary network (4) wherein flows the same cycle coolant as in the main network (2). Said secondary network includes a secondary radiator (32) and a secondary pump (34). The main network (2) and the secondary network (4) have a common recovery tank (50). Said tank may include a separating partition which can be perforated with a restrictor.

Description

Système de gestion de l'énergie thermique d'un moteur thermique comprenant deux réseauxThermal energy management system of a heat engine comprising two networks
L'invention concerne un système de gestion de l'énergie thermique développée par un moteur thermique de véhicule automobile, comprenant un réseau principal incluant une pompe principale pour faire circuler un fluide de cycle caloporteur entre le moteur du véhicule et un radiateur principal échangeant de la chaleur avec l'air atmosphérique extérieur.The invention relates to a thermal energy management system developed by a thermal engine of a motor vehicle, comprising a main network including a main pump for circulating a coolant cycle fluid between the vehicle engine and a main radiator exchanging heat. heat with outside atmospheric air.
Les véhicules automobiles comprennent un circuit de refroidissement du moteur qui permet de maintenir ce dernier à une température de fonctionnement optimale. Ce circuit inclut un radiateur de refroidissement disposé à l'avant du véhicule et traversé par un flux d'air pour évacuer la chaleur du fluide de cycle caloporteur qui refroidit le moteur. Le circuit de refroidissement du moteur est également utilisé pour réchauffer l'habitacle du véhicule au moyen d'un aérotherme traversé par le même fluide de cycle caloporteur.Motor vehicles include an engine cooling system that keeps the engine at an optimal operating temperature. This circuit includes a cooling radiator placed at the front of the vehicle and traversed by an air flow to evacuate the heat from the coolant cycle fluid which cools the engine. The engine cooling circuit is also used to heat the passenger compartment of the vehicle by means of an air heater through which the same coolant cycle fluid flows.
D'autre part, les véhicules modernes comprennent de plus en plus souvent des équipements qui améliorent le confort ou la sécurité des passagers, ou encore qui réduisent la pollution ou augmentent les performances du véhicule. C'est ainsi que de nombreux véhicules sont équipés d'un circuit de climatisation qui permet de refroidir l'habitacle du véhicule. Certains véhicules sont équipés également d'un circuit de refroidissement de l'huile. Les moteurs suralimentés comprennent fréquemment un refroidisseur d'air de suralimentation qui permet d'abaisser la température de l'air avant son introduction dans les cylindres du moteur. Enfin, les véhicules modernes sont fréquemment équipés d'un refroidisseur de gaz d'échappement qui permet de réduire la pollution du véhicule . Chacun de ces équipements nécessite un circuit de fluide séparé dans lequel circule un fluide particulier approprié. En outre, chacun de ces circuits de refroidissement possède son propre vase d'expansion dont la fonction est de permettre la dilatation du fluide lorsque ce dernier monte en température. Le vase d'expansion constitue également une réserve de fluide qui permet de s'assurer que le circuit est toujours rempli de fluide, même en cas de légère fuite.On the other hand, modern vehicles increasingly include equipment which improves the comfort or safety of passengers, or which reduces pollution or increases vehicle performance. Many vehicles are thus fitted with an air conditioning system which cools the vehicle interior. Some vehicles are also equipped with an oil cooling system. Supercharged engines frequently include a charge air cooler that lowers the temperature of the air before it enters the engine cylinders. Finally, modern vehicles are frequently fitted with an exhaust gas cooler which helps reduce vehicle pollution. Each of these pieces of equipment requires a separate fluid circuit through which a specific suitable fluid circulates. In addition, each of these cooling circuits has its own expansion tank, the function of which is to allow the fluid to expand when the latter rises in temperature. The expansion tank also constitutes a reserve of fluid which ensures that the circuit is always filled with fluid, even in the event of a slight leak.
Ces systèmes connus présentent plusieurs inconvénients. Tout d'abord, le fait de prévoir un circuit séparé pour chaque équipement du véhicule augmente le nombre de canalisations et, par conséquent, l'encombrement sous le capot moteur. En outre, le fait que chaque circuit de fluide dispose de son propre vase d'expansion conduit à la multiplication de ce composant.These known systems have several drawbacks. First of all, the fact of providing a separate circuit for each item of equipment in the vehicle increases the number of pipes and, consequently, the space taken up under the engine hood. In addition, the fact that each fluid circuit has its own expansion tank leads to the multiplication of this component.
La présente invention a pour objet un système de gestion de l'énergie thermique d'un moteur thermique de véhicule automobile qui remédie à ces inconvénients. Ce système a pour but de réduire le nombre des composants et, par suite, l'encombrement sous le capot moteur, ainsi que le prix de revient de l'ensemble.The present invention relates to a system for managing the thermal energy of a thermal engine of a motor vehicle which overcomes these drawbacks. The purpose of this system is to reduce the number of components and, consequently, the space taken up under the engine hood, as well as the cost price of the assembly.
Ces buts sont atteints, conformément à l'invention, par le fait que le système de gestion de l'énergie thermique comprend, en outre, un réseau secondaire dans lequel circule le même fluide de cycle caloporteur que dans le réseau principal, ce réseau secondaire incluant un radiateur secondaire et une pompe secondaire, le réseau principal et le réseau secondaire possédant un vase d'expansion commun.These aims are achieved, in accordance with the invention, by the fact that the thermal energy management system further comprises a secondary network in which the same coolant cycle fluid circulates as in the main network, this secondary network. including a secondary radiator and a secondary pump, the main network and the secondary network having a common expansion tank.
Grâce à ces caractéristiques, le système de gestion de l'énergie thermique fait appel à un fluide unique, à savoir le fluide de cycle qui refroidit le moteur thermique du véhicule. Le fluide de refroidissement du moteur sert de source froide pour refroidir ou réchauffer tous les autres fluides (air d'admission, gaz d'échappement, liquide de climatisation, huile de lubrification moteur et/ou boite, carburant, etc.) qui le nécessitent. Seul le fluide de refroidissement du moteur thermique échange de la chaleur avec l'air ambiant.Thanks to these characteristics, the thermal energy management system uses a single fluid, namely the cycle fluid which cools the vehicle's thermal engine. The engine coolant acts as a cold source to cool or heat all other fluids (air intake, exhaust gas, air conditioning fluid, engine and / or gearbox lubricating oil, fuel, etc.) that require it. Only the engine coolant exchanges heat with the ambient air.
En outre, le nombre de canalisations est très nettement diminué. Le système comporte un vase d'expansion unique qui sert pour tous les équipements du véhicule. Le nombre des composants, et par conséquent leur encombrement, est fortement réduit. Ledit vase d'expansion permet également le remplissage commun des deux réseaux.In addition, the number of pipes is very significantly reduced. The system includes a single expansion tank which is used for all equipment in the vehicle. The number of components, and therefore their size, is greatly reduced. Said expansion tank also allows the common filling of the two networks.
Le vase d'expansion peut ne comporter aucune séparation intérieure. Dans ce cas, le vase d'expansion commun assure le passage de fluide de cycle d'un réseau à un autre.The expansion tank may have no interior partitions. In this case, the common expansion vessel ensures the passage of cycle fluid from one network to another.
Dans une autre réalisation, le vase d'expansion commun comporte une cloison de séparation totale ou partielle. Dans ce dernier cas ladite cloison dépasse le niveau ordinaire du fluide de cycle dans le vase d'expansion.In another embodiment, the common expansion vessel includes a partition for total or partial separation. In the latter case, said partition exceeds the ordinary level of the cycle fluid in the expansion tank.
Une telle cloison permet d'éviter la transmission des ondes de choc pouvant se propager dans un des réseaux à l'autre réseau.Such a partition makes it possible to avoid the transmission of shock waves which can propagate in one of the networks to the other network.
Avec une cloison de séparation partielle telle qu'évoquée plus haut, les deux réseaux sont en principe séparés, mais la possibilité d'une circulation de fluide d'un réseau à un autre est conservée par débordement au dessus de la cloison.With a partial partition as mentioned above, the two networks are in principle separate, but the possibility of a circulation of fluid from one network to another is preserved by overflowing above the partition.
Dans une autre réalisation encore, la cloison de séparation du vase d'expansion est percée d'une restriction.In yet another embodiment, the partition of the expansion tank is pierced with a restriction.
Cette restriction permet une communication d'un réseau à un autre, mais cette communication est limitée par la section de passage de la restriction. Une telle restriction facilite le remplissage de chacune des parties du vase d'expansion. Elle est avantageusement située dans la moitié inférieure de la cloison.This restriction allows communication from one network to another, but this communication is limited by the passage section of the restriction. Such a restriction facilitates the filling of each of the parts of the expansion tank. She is advantageously located in the lower half of the partition.
Des caractéristiques complémentaires ou optionnelles de l'invention sont énumérées ci-après :Additional or optional features of the invention are listed below:
— le réseau principal comporte une vanne à quatre voies, une première voie étant reliée à la sortie du radiateur principal, une deuxième voie étant reliée à la sortie du circuit de refroidissement du moteur, une troisième voie étant reliée à l'entrée de la pompe principale et une quatrième voie à la sortie de 1 ' aérotherme ;- the main network includes a four-way valve, a first way being connected to the outlet of the main radiator, a second way being connected to the outlet of the engine cooling circuit, a third way being connected to the inlet of the pump main and a fourth channel at the exit of one heater;
— le système comporte un appareil de contrôle qui reçoit des informations sur la température du fluide en différents points du réseau principal et du réseau secondaire afin de commander la vanne à quatre voies ;- the system includes a control device which receives information on the temperature of the fluid at different points of the main network and of the secondary network in order to control the four-way valve;
— l'appareil de contrôle commande également la mise en marche et l'arrêt de la pompe secondaire ;- the control unit also controls the starting and stopping of the secondary pump;
— le réseau principal comprend une canalisation de moteur sur laquelle sont montés la pompe principale et le moteur thermique, une .canalisation de chauffage sur laquelle est monté 1 ' aérotherme, une canalisation de radiateur principal sur laquelle est monté le radiateur principal, une canalisation de court-circuit, la canalisation de moteur, la canalisation de chauffage, la canalisation de radiateur principal et la canalisation de court-circuit étant montées en parallèle ;The main network comprises an engine pipeline on which the main pump and the heat engine are mounted, a heating pipe on which the air heater is mounted, a main radiator pipe on which the main radiator is mounted, a short circuit, the engine line, the heating line, the main radiator line and the short circuit line being connected in parallel;
— le véhicule automobile comporte un ou plusieurs équipements en relation d'échange thermique avec le milieu qui leur est extérieur par l'intermédiaire d'un échangeur de chaleur d'équipement, le ou les échangeurs de chaleur d'équipement étant intégrés au réseau principal et/ou au réseau secondaire, chaque échangeur de chaleur étant en relation d'échange de chaleur avec le fluide de cycle caloporteur.- the motor vehicle comprises one or more pieces of equipment in heat exchange relation with the environment which is external to them by means of an equipment heat exchanger, the equipment heat exchanger (s) being integrated into the main network and / or to the secondary network, each heat exchanger being in a heat exchange relationship with the coolant cycle fluid.
D'autres caractéristiques et avantages de la présente invention apparaîtront encore à la lecture de la description qui suit d'exemples de réalisation donnés à titre illustratif en référence aux figures annexées. Sur ces figures :Other features and advantages of the present invention will appear further on reading the following description of exemplary embodiments given by way of illustration with reference to the appended figures. In these figures:
- la Figure 1 est une vue générale schématique d'un système de gestion de l'énergie thermique conforme à la présente invention ;- Figure 1 is a schematic general view of a thermal energy management system according to the present invention;
- la Figure 2 est une vue schématique en coupe d'une première variante d'un vase d'expansion commun destiné à un système de gestion de l'énergie thermique conforme à l'invention ;- Figure 2 is a schematic sectional view of a first variant of a common expansion tank for a thermal energy management system according to the invention;
- la Figure 3 est une deuxième variante de réalisation d'un vase d'expansion ; et- Figure 3 is a second alternative embodiment of an expansion tank; and
- la Figure 4 est une troisième variante de réalisation d'un vase d'expansion.- Figure 4 is a third alternative embodiment of an expansion tank.
Le système de gestion de l'énergie thermique développée par un moteur thermique de l'invention représenté sur la Figure 1 est constitué d'un réseau principal désigné par la référence générale 2 et d'un réseau secondaire désigné par la référence générale 4. Le réseau principal 2 comporte une canalisation de moteur thermique 8 sur laquelle est monté un moteur thermique 10. Une pompe principale 12 fait circuler un fluide caloporteur dans le circuit de refroidissement du moteur 10, comme schématisé par les flèches 14. Le réseau principal comporte également une canalisation de radiateur 16 sur laquelle est monté un radiateur principal 18. Par ailleurs, une canalisation de court-circuit 20 est montée en parallèle à la canalisation de radiateur 16. Le fluide qui sert à refroidir le moteur thermique 10 est utilisé également pour chauffer l'habitacle du véhicule. A cet effet, il circule par l'intermédiaire d'une canalisation de chauffage 22 dans un radiateur de chauffage ou aérotherme 24 monté sur la canalisation 22. Une vanne à quatre voies 70 assure la régulation en température du moteur, par exemple autour d'une température de consigne de 100°. Une première voie 70χ de la vanne 70 est reliée à la canalisation de radiateur 16, une seconde voie 702 est reliée à la canalisation de court-circuit 20, une troisième voie 703 est reliée à la canalisation de moteur 8 et une quatrième voie 704 est reliée à la canalisation de chauffage 22.The thermal energy management system developed by a thermal engine of the invention shown in Figure 1 consists of a main network designated by the general reference 2 and a secondary network designated by the general reference 4. The main network 2 comprises a heat engine pipe 8 on which is mounted a heat engine 10. A main pump 12 circulates a heat transfer fluid in the engine cooling circuit 10, as shown schematically by the arrows 14. The main network also includes a radiator pipe 16 on which a main radiator 18 is mounted. Furthermore, a short-circuit pipe 20 is mounted in parallel with the radiator pipe 16. The fluid which is used to cool the heat engine 10 is also used to heat the vehicle interior. To this end, it circulates by means of a heating pipe 22 in a heating or air heater 24 mounted on the pipe 22. A four-way valve 70 regulates the temperature of the engine, for example around a set temperature of 100 °. A first channel 70χ of the valve 70 is connected to the radiator pipe 16, a second channel 70 2 is connected to the short-circuit line 20, a third channel 70 3 is connected to the motor line 8 and a fourth channel 70 4 is connected to the heating line 22.
Le réseau principal peut, en outre, comporter de manière optionnelle des équipements complémentaires tels qu'un refroidisseur d'huile de lubrification moteur 26 monté sur une canalisation d'équipement 28.The main network can also optionally include additional equipment such as an engine lubricating oil cooler 26 mounted on an equipment pipe 28.
Le réseau secondaire 4 comprend une boucle fermée 30 sur laquelle est monté un radiateur secondaire 32. Une pompe de circulation électrique 34 assure la circulation du fluide de cycle caloporteur dans la boucle 30 et, par conséquent, dans le radiateur secondaire 32. En outre, des échangeurs d'équipements optionnels peuvent être montés sur la boucle de refroidissement 30. Par exemple, dans l'exemple représenté, le véhicule est équipé d'un circuit de climatisation de l'habitacle du véhicule automobile. Le condenseur 36 du circuit de climatisation est monté sur la boucle 30 afin d'être refroidi par le fluide de cycle caloporteur qui sort du radiateur secondaire 32.The secondary network 4 comprises a closed loop 30 on which is mounted a secondary radiator 32. An electric circulation pump 34 ensures the circulation of the coolant cycle fluid in the loop 30 and, consequently, in the secondary radiator 32. In addition, optional equipment exchangers can be mounted on the cooling loop 30. For example, in the example shown, the vehicle is equipped with an air conditioning circuit for the passenger compartment of the motor vehicle. The condenser 36 of the air conditioning circuit is mounted on the loop 30 so as to be cooled by the coolant cycle fluid which leaves the secondary radiator 32.
Un appareil de contrôle 40 reçoit un signal de température d'une sonde 42 installée à la sortie du circuit de refroidissement du moteur thermique 10 et également d'une sonde 44 installée à la sortie du radiateur secondaire 32. L'appareil de contrôle 40 utilise ces informations pour piloter le fonctionnement de la vanne à quatre voies 70. Cette vanne assure la régulation en température du moteur et gère les voies de court-circuit 20, d' aérotherme 22, de radiateur principal 16 et de la canalisation d'équipement 28. La vanne à quatre voies 70 remplace ainsi la vanne thermostatique habituellement utilisée dans les systèmes conventionnels. Par exemple, s'il est nécessaire de chauffer l'habitacle du véhicule, la canalisation de chauffage 22 sur laquelle est monté l' aérotherme 24 est ouverte. Dans le cas contraire, cette canalisation est fermée. L'appareil de contrôle 40 pilote également le fonctionnement de la pompe 34 du réseau secondaire 4.A monitoring device 40 receives a temperature signal from a probe 42 installed at the outlet of the cooling circuit of the heat engine 10 and also from a probe 44 installed at the outlet of the secondary radiator 32. The monitoring device 40 uses this information to control the operation of the four-way valve 70. This valve regulates the temperature of the motor and manages the short-circuit 20, air heater 22, main radiator 16 and equipment pipe 28 tracks. The four-way valve 70 thus replaces the thermostatic valve usually used in conventional systems. For example, if it is necessary to heat the passenger compartment of the vehicle, the heating pipe 22 on which the air heater 24 is mounted is open. Otherwise, this pipe is closed. The control device 40 also controls the operation of the pump 34 of the secondary network 4.
Le radiateur principal 18 est relié à un vase d'expansion 50 par une canalisation 52. La canalisation 52 est également reliée à la canalisation de moteur 8 par une branche 54. De la même manière, le radiateur secondaire 32 est relié au vase d'expansion 50 par une canalisation 56. Le vase d'expansion 50 est ainsi commun au réseau principal 2 et au réseau secondaire 4. Lorsque la température du fluide augmente, ce dernier se dilate et le volume excédentaire est reçu dans le vase d'expansion. Inversement, lorsque le fluide se refroidit, ou lorsqu'une perte de liquide se produit par suite d'un défaut d' étanchéité, une quantité de fluide caloporteur peut être admise dans le réseau principal par une canalisation 58 et dans le réseau secondaire par une canalisation 60.The main radiator 18 is connected to an expansion tank 50 by a pipe 52. The pipe 52 is also connected to the engine pipe 8 by a branch 54. In the same way, the secondary radiator 32 is connected to the expansion 50 by a pipe 56. The expansion tank 50 is thus common to the main network 2 and to the secondary network 4. When the temperature of the fluid increases, the latter expands and the excess volume is received in the expansion tank. Conversely, when the fluid cools, or when a loss of liquid occurs as a result of a leak, a quantity of heat transfer fluid can be admitted into the main network by a pipe 58 and into the secondary network by a line 60.
Le radiateur principal 18 et le radiateur secondaire 32 peuvent être réalisés sous la forme de deux échangeurs distincts. Ils peuvent également être placés l'un devant l'autre pour former un module d'échange présentant un encombrement réduit. Dans ce cas, le radiateur secondaire 32 sera de préférence placé devant le radiateur principal 18. Le radiateur secondaire verra l'air en premier. En d'autres termes, c'est lui qui sera refroidi le premier par le flux d'air extérieur. Le radiateur principal qui sera refroidi par le flux d'air ayant déjà traversé le radiateur secondaire sera avantageusement refroidi. De la sorte, le réseau secondaire 4 constituera un réseau à basse température relativement au réseau principal 2 qui constituera un réseau à haute température.The main radiator 18 and the secondary radiator 32 can be produced in the form of two separate exchangers. They can also be placed one in front of the other to form an exchange module having a reduced bulk. In this case, the secondary radiator 32 will preferably be placed in front of the main radiator 18. The secondary radiator will see the air first. In other words, it will be the first to be cooled by the outside air flow. The main radiator which will be cooled by the air flow which has already passed through the secondary radiator will advantageously be cooled. In this way, the secondary network 4 will constitute a low temperature network relative to the main network 2 which will constitute a high temperature network.
Le radiateur principal 18 ou radiateur à haute température et le radiateur secondaire 32 ou radiateur à basse température peuvent encore faire partie d'un échangeur dit AmultifonctionΘ, c'est-à-dire d'un module d'échange de chaleur dans lequel les deux échangeurs sont superposés de manière à être traversés par un même flux d'air, une boîte collectrice de sortie du radiateur à haute température 18 communiquant avec une boîte collectrice d'entrée du radiateur à basse température 32 par un orifice de passage (non représenté) des moyens de vanne permettant d'ouvrir ou de fermer cet orifice de passage. Le vase d'expansion 50 comporte donc deux entrées, à savoir une entrée 62 pour le fluide du réseau principal 2 et une entrée 64 pour le fluide caloporteur du réseau secondaire 4. Le vase d'expansion 50 comporte également deux sorties, à savoir une sortie 66 vers le réseau principal 2 et une sortie 68 vers le réseau secondaire 4. Les entrées et/ou les sorties peuvent également être communes, comme illustré à la Figure 2 en pointillé pour les sorties 66 et 68.The main radiator 18 or high temperature radiator and the secondary radiator 32 or low temperature radiator can also be part of a so-called AmultifunctionΘ exchanger, that is to say of a heat exchange module in which the two exchangers are superimposed so as to be traversed by the same air flow, a high temperature radiator outlet manifold 18 communicating with a low temperature radiator inlet manifold 32 by a passage orifice (not shown ) valve means making it possible to open or close this passage orifice. The expansion tank 50 therefore has two inlets, namely an inlet 62 for the fluid of the main network 2 and an inlet 64 for the heat transfer fluid of the secondary network 4. The expansion tank 50 also has two outlets, namely a output 66 to the main network 2 and an output 68 to the secondary network 4. The inputs and / or outputs can also be common, as illustrated in Figure 2 in dotted lines for outputs 66 and 68.
On a représenté sur la Figure 2 une première variante de réalisation du vase d'expansion 50 commun au réseau principal 2 et au réseau secondaire 4. Ce vase d'expansion comporte une entrée 62 reliée au réseau principal 2 et une entrée 64 reliée au réseau secondaire 4. Il comporte également une sortie 66 reliée au réseau principal 2 et une sortie 68 reliée au réseau secondaire 4. En variante, il est possible de prévoir une sortie unique en Y comportant deux branches 66 et 68, comme représenté en traits pointillés. On a désigné par la référence 67 le niveau du fluide caloporteur dans le vase d'expansion 50.FIG. 2 shows a first alternative embodiment of the expansion tank 50 common to the main network 2 and to the secondary network 4. This expansion tank has an inlet 62 connected to the main network 2 and an inlet 64 connected to the network secondary 4. It also includes an outlet 66 connected to the main network 2 and an outlet 68 connected to the secondary network 4. As a variant, it is possible to provide a single Y-shaped outlet comprising two branches 66 and 68, as shown in dotted lines. The level of the heat transfer fluid in the expansion tank 50 has been designated by the reference 67.
Grâce à la présence du vase d'expansion, le réseau principal 2 et le réseau secondaire 4 ne sont pas entièrement séparés, une communication entre eux s'établit par l'intermédiaire du vase d'expansion. Le fluide caloporteur peut passer d'un réseau dans l'autre et vice versa par l'intermédiaire du vase d'expansion commun et des canalisations 52 et 58 pour le réseau principal, et 56 et 60 pour le réseau secondaire. Cette caractéristique permet d'utiliser le même fluide de cycle caloporteur dans les deux réseaux. Le système de gestion de l'énergie thermique utilise donc un fluide unique, ce qui constitue une différence par rapport aux autres systèmes qui utilisent un fluide différent pour chaque équipement à refroidir. Cette caractéristique permet également de réaliser des configurations différentes, en fonction de la charge du moteur. En cas de faible charge, le radiateur à haute température 18 peut être utilisé pour refroidir des équipements tels que le condenseur de climatisation, un refroidisseur d'air de suralimentation ou même un refroidisseur de gaz d'échappement. Inversement, en cas de forte • ou de très forte charge du moteur, le radiateur à basse température peut être utilisé pour compléter le refroidissement du moteur thermique 10.Thanks to the presence of the expansion tank, the main network 2 and the secondary network 4 are not entirely separated, a communication between them is established via the expansion tank. The heat transfer fluid can pass from one network to another and vice versa via the common expansion tank and pipes 52 and 58 for the main network, and 56 and 60 for the secondary network. This characteristic makes it possible to use the same coolant cycle fluid in the two networks. The thermal energy management system therefore uses a single fluid, which is a difference compared to other systems that use a different fluid for each piece of equipment to be cooled. This feature also allows for different configurations, depending on the engine load. In case of low load, the high temperature radiator 18 can be used to cool equipment such as the air conditioning condenser, a charge air cooler or even an exhaust gas cooler. Conversely, in the event of strong • or very heavy load of the engine, the low temperature radiator can be used to complete the cooling of the heat engine 10.
On a représenté sur la Figure 3 une deuxième variante de réalisation du vase d'expansion commun 50. Il comporte une cloison de séparation 69 qui le divise en deux parties séparées. Ainsi, le réseau principal 2 et le réseau secondaire 4 ne communiquent pas l'un avec l'autre et, en principe, aucun échange de fluide ne s'établit entre ces deux circuits, à moins que le niveau 67 du fluide ne passe par-dessus la cloison 69.There is shown in Figure 3 a second alternative embodiment of the common expansion tank 50. It comprises a partition 69 which divides it into two separate parts. Thus, the main network 2 and the secondary network 4 do not communicate with each other and, in principle, no exchange of fluid is established between these two circuits, unless the level 67 of the fluid passes through above the partition 69.
On a représenté sur la Figure 4 une troisième variante de réalisation du vase d' expansion commun 50. Dans cette variante, la cloison de séparation 69 est percée par un orifice calibré 71 qui assure un passage limité du fluide caloporteur à travers la cloison 69, c ' est-à-dire d ' un réseau vers l ' autre . Ainsi, une circulation de fluide peut s ' établir d' un réseau vers l ' autre, comme dans le cas du mode de réalisation de la Figure 2 . Toutefois, cette circulation est limitée par la dimension de l ' orifice calibré 71. Ledit orifice calibré pourra être remplacé par une vanne thermostatique . FIG. 4 shows a third alternative embodiment of the common expansion tank 50. In this alternative, the partition 69 is pierced by a calibrated orifice 71 which ensures a limited passage of the heat transfer fluid through the partition 69, that is to say from one network to another. Thus, a circulation of fluid can be established from one network to the other, as in the case of the embodiment of FIG. 2. However, this circulation is limited by the dimension of the calibrated orifice 71. Said calibrated orifice may be replaced by a thermostatic valve.

Claims

Revendications claims
1. Système de gestion de l'énergie thermique développée par un moteur thermique (10) de véhicule automobile, comprenant un réseau principal (2) incluant une pompe principale (12) pour faire circuler un fluide de cycle caloporteur entre le moteur thermique (10) et un radiateur principal (18) échangeant de la chaleur avec l'air atmosphérique extérieur, caractérisé en ce qu'il comprend, en outre, un réseau secondaire (4) dans lequel circule le même fluide de cycle caloporteur que dans le réseau principal (2), ce réseau secondaire (4) incluant un radiateur secondaire (32) et une pompe secondaire (34), le réseau principal (2) et le réseau secondaire (4) possédant un vase d'expansion commun (50).1. A thermal energy management system developed by a heat engine (10) of a motor vehicle, comprising a main network (2) including a main pump (12) for circulating a coolant cycle fluid between the heat engine (10 ) and a main radiator (18) exchanging heat with the outside atmospheric air, characterized in that it further comprises a secondary network (4) in which the same coolant cycle fluid circulates as in the main network (2), this secondary network (4) including a secondary radiator (32) and a secondary pump (34), the main network (2) and the secondary network (4) having a common expansion tank (50).
2. Système selon la revendication 1, caractérisé en ce que le vase d'expansion commun (50) comporte une cloison de séparation (69) qui dépasse le niveau ordinaire (67) du fluide dans le vase d'expansion.2. System according to claim 1, characterized in that the common expansion tank (50) comprises a partition (69) which exceeds the ordinary level (67) of the fluid in the expansion tank.
3. Système selon la revendication 2, caractérisé en ce que la cloison (69) est percée d'une restriction (71) .3. System according to claim 2, characterized in that the partition (69) is pierced with a restriction (71).
4. Système selon l'une des revendications 1 à 3, caractérisé en ce que le réseau principal (2) comporte une vanne à quatre voies (70) , une première voie (70ι) étant liée à la sortie du radiateur principal (18) , une deuxième voie (702) étant reliée à la sortie du circuit de refroidissement du moteur (10) , une troisième voie (703) étant reliée à l'entrée de la pompe principale (18), une quatrième voie (704) étant reliée à la sortie de l'aérotherme (24).4. System according to one of claims 1 to 3, characterized in that the main network (2) comprises a four-way valve (70), a first way (70ι) being linked to the outlet of the main radiator (18) , a second channel (70 2 ) being connected to the output of the engine cooling circuit (10), a third channel (70 3 ) being connected to the input of the main pump (18), a fourth channel (70 4 ) being connected to the outlet of the heater (24).
5. Système selon la revendication 4, caractérisé en ce qu'il comporte un appareil de contrôle (40) qui reçoit des informations sur la température du fluide en différents points du réseau principal (2) et du réseau secondaire (4) afin de commander la vanne à quatre voies (70) .5. System according to claim 4, characterized in that it comprises a control device (40) which receives information on the temperature of the fluid at different points of the main network (2) and of the secondary network (4) in order to control the four-way valve (70).
6. Système selon la revendication 5, caractérisé en ce que l'appareil de contrôle (40) commande également la mise en marche et l'arrêt de la pompe secondaire (34) .6. System according to claim 5, characterized in that the control device (40) also controls the starting and stopping of the secondary pump (34).
7. Système selon l'une des revendications 1 à 6, caractérisé en ce que le réseau principal (2) comprend une canalisation de moteur (8) sur laquelle sont montés la pompe principale (12) et le moteur thermique (10), une canalisation de chauffage (22) sur laquelle est monté l'aérotherme (24), une canalisation de radiateur principal (16) sur laquelle est monté le radiateur principal (18), une canalisation de court-circuit (20), la canalisation de moteur (8), la canalisation de chauffage (22), la canalisation de radiateur principal (16) et la canalisation de court-circuit (20) étant montées en parallèle.7. System according to one of claims 1 to 6, characterized in that the main network (2) comprises a motor pipe (8) on which are mounted the main pump (12) and the heat engine (10), a heating pipe (22) on which the air heater (24) is mounted, a main radiator pipe (16) on which the main radiator (18) is mounted, a short circuit pipe (20), the engine pipe (8), the heating pipe (22), the main radiator pipe (16) and the short-circuit pipe (20) being mounted in parallel.
8. Système selon l'une des revendications 1 à 7, caractérisé en ce que le véhicule automobile comporte un ou plusieurs équipements en relation d'échange thermique avec le milieu qui leur est extérieur par l'intermédiaire d'un échangeur de chaleur d'équipement (26, 36), le ou les échangeurs de chaleur d'équipement étant intégrés au réseau principal (2) et/ou au réseau secondaire (4), chaque échangeur de chaleur (26, 36) étant en relation d'échange de chaleur avec le fluide de cycle caloporteur qui refroidit le moteur thermique (10) . 8. System according to one of claims 1 to 7, characterized in that the motor vehicle comprises one or more pieces of equipment in heat exchange relation with the medium which is external to them by means of a heat exchanger of equipment (26, 36), the equipment heat exchanger (s) being integrated into the main network (2) and / or the secondary network (4), each heat exchanger (26, 36) being in heat exchange relationship heat with the coolant cycle fluid which cools the heat engine (10).
EP02793225A 2001-11-13 2002-11-08 Heat energy management system comprising two networks Withdrawn EP1499795A2 (en)

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FR0114663 2001-11-13
FR0114663A FR2832186B1 (en) 2001-11-13 2001-11-13 THERMAL ENERGY MANAGEMENT SYSTEM FOR A THERMAL ENGINE COMPRISING TWO NETWORKS
PCT/FR2002/003855 WO2003042516A2 (en) 2001-11-13 2002-11-08 Heat energy management system comprising two networks

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FR2832186B1 (en) 2004-05-07

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