WO2019048751A1 - Thermal system, in particular a motor vehicle air conditioning system - Google Patents

Thermal system, in particular a motor vehicle air conditioning system Download PDF

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Publication number
WO2019048751A1
WO2019048751A1 PCT/FR2018/052050 FR2018052050W WO2019048751A1 WO 2019048751 A1 WO2019048751 A1 WO 2019048751A1 FR 2018052050 W FR2018052050 W FR 2018052050W WO 2019048751 A1 WO2019048751 A1 WO 2019048751A1
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WO
WIPO (PCT)
Prior art keywords
storage unit
evaporator
valve
refrigerant
fluidic
Prior art date
Application number
PCT/FR2018/052050
Other languages
French (fr)
Inventor
Damien HERMOUET
Samer Saab
Philippe Jouanny
Carlos Martins
Anne-Sylvie Magnier-Cathenod
Bertrand Gessier
Fernando Cabrita
François CHARBONNELLE
Original Assignee
Valeo Systemes Thermiques
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 Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2019048751A1 publication Critical patent/WO2019048751A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00492—Heating, cooling or ventilating [HVAC] devices comprising regenerative heating or cooling means, e.g. heat accumulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
    • B60H1/00514—Details of air conditioning housings
    • B60H1/00542—Modular assemblies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3229—Cooling devices using compression characterised by constructional features, e.g. housings, mountings, conversion systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator

Definitions

  • Thermal system in particular an automobile air-conditioning system
  • the invention relates to a thermal system for a motor vehicle, in particular an air-conditioning system for a motor vehicle.
  • ventilating, heating and / or air-conditioning apparatus for a passenger compartment of a motor vehicle generally comprise a closed thermodynamic loop comprising at least, according to the direction of circulation of a cooling fluid, an evaporator on the air, a compressor, a condenser and a valve or expansion device.
  • a closed thermodynamic loop comprising at least, according to the direction of circulation of a cooling fluid, an evaporator on the air, a compressor, a condenser and a valve or expansion device.
  • the air is cooled by passing on the evaporator before being expelled to the passenger compartment by pipes.
  • the ventilation devices are poor, or do not work at all.
  • the pressure level prevailing in the storage devices is equivalent to that of the evaporator at its pressure drop, which is penalizing during the storage phase.
  • the subject of the invention is thus a thermal system for a motor vehicle, in particular an air-conditioning system for a motor vehicle, this system comprising:
  • a main thermal circuit comprising a compressor arranged to compress a refrigerant circulating in this circuit and an evaporator arranged to cool a flow of air flowing in contact with the evaporator, this cooling being obtained by heat exchange between the air flow to cool and refrigerant circulating in this evaporator,
  • a secondary thermal device comprising a frigory storage unit, a device creating a detent between the outlet of the evaporator and the inlet of the frigory storage unit, and a pump, this secondary device being arranged in a manner:
  • the invention which is in particular to prevent the exchange of refrigerant between the secondary thermal device and the main thermal circuit during normal operation, this normal operation is not affected by an unwanted passage of refrigerant through the cold storage unit, which would have had the effect of reducing the performance of air conditioning.
  • This also makes it possible not to degrade the performance of the storage unit because it is maintained at a pressure lower than that of the evaporator when it is filled with frigories.
  • the pump is arranged to be bypassed when the frigory storage unit receives frigories of the refrigerant which passes through it. The pump is then stopped.
  • the secondary thermal device comprises at least a first bypass valve arranged to selectively prevent refrigerant circulation between the frigory storage unit and the main thermal circuit in normal mode.
  • the secondary thermal device is arranged so that the flow direction of the refrigerant in the cold storage unit is reversed respectively: when this frigory storage unit receives frigories of the refrigerant which passes through it and
  • the first bypass valve is a 3-way valve arranged at a junction between the secondary thermal device and the main thermal circuit.
  • This 3-way valve can be replaced by two 2-way valves, if desired.
  • the secondary thermal device comprises a second bypass valve, in particular a two-way valve, arranged to be traversed selectively by refrigerant which flows from the evaporator of the main thermal circuit to the storage unit of frigories to allow a relaxation that will transfer frigories of the refrigerant to the storage unit of frigories in storage mode.
  • the secondary thermal device comprises a secondary branch on which is disposed this second bypass valve, this branch making fluid junction with a primary branch on which are arranged the cold storage unit and the pump.
  • this junction between the primary branch and the secondary branch is disposed between the frigory storage unit and the pump.
  • the secondary thermal device comprises a non-return valve disposed on the primary branch downstream of the pump. This valve or non-return valve can be integrated in the pump.
  • the secondary thermal device is arranged so that:
  • the cold storage unit In operating mode of the main thermal circuit without use of the secondary thermal device, the cold storage unit is bypassed and the pump is stopped.
  • the cold storage unit In operating mode of the main thermal circuit with charging in frigories of the cold storage unit of the secondary thermal device by expansion through the expansion device, the cold storage unit is traversed by refrigerant and the pump is when stationary, the storage unit and the evaporator being preferably in series,
  • the compressor In operating mode of the secondary thermal device to return frigories to the evaporator of the main thermal circuit, the compressor is stopped or runs at low speed, the refrigerant storage unit is traversed by refrigerant and the pump is running,
  • cold boost mode namely in operating mode of the secondary thermal device to restore frigories to the evaporator of the main thermal circuit, whose compressor operates at low or high load, the cold storage unit is refrigerant and the pump is running.
  • the secondary thermal device is arranged so that the flow direction of the refrigerant in the cold storage unit is the same respectively:
  • a non-return valve is disposed at the outlet of the frigory storage unit.
  • two bypass valves are provided.
  • one of the bypass valves is disposed at the entrance of the frigory storage unit, on a primary branch, and allows relaxation.
  • the other of the bypass valves is arranged between the evaporator and the pump, on a secondary branch to allow the bypass, or bypass, of the cold storage unit in normal mode .
  • the two bypass valves can be replaced by a 3-way valve.
  • the conduit leading the refrigerant flow from the cold storage unit to the pump can be located downstream or upstream of the non-return valve thus allowing the refrigerant pump to be arranged. directly at the outlet of the frigory storage unit.
  • the frigory storage unit is arranged to be at a lower pressure than the evaporator.
  • the second bypass valve disposed between the evaporator and the frigory storage unit is arranged to generate two pressure levels respectively for the evaporator and the storage unit.
  • this second bypass valve may be a variable passage section valve, a single passage section valve or a three way valve.
  • This valve can be an on / off valve that precedes a calibrated orifice. To maintain the comfort of passenger unchanged, the pressure must remain stable at the evaporator.
  • an expansion device either thermostatic or electrical, is arranged upstream of the evaporator to generate an expansion of the refrigerant before it passes through the evaporator.
  • the opening of this expansion device is controlled by overheating at the inlet of an internal heat exchanger or at the compressor inlet or at the outlet of the evaporator.
  • the cold storage unit is arranged inside an HVAC or outside an HVAC.
  • the system comprises an air path disposed parallel to the evaporator, a path through which air can circulate bypassing the evaporator, and this air can, at the exit of this path, be mix with air from the evaporator.
  • the passage section of this track is particularly controlled by a component.
  • This flap is in particular in parallel with the evaporator.
  • the position of the valve downstream of the evaporator can help to adjust the air temperature at the evaporator outlet by mixing the cold air from the evaporator and the warmer air coming from the track. aforementioned air.
  • the valve may be for example a simple closing valve with a fixed diameter.
  • the 2-way valve is, for example, arranged to generate a fixed pressure drop so as to protect the evaporator from the formation of ice.
  • the valve protects the evaporator from icing, and the flap regulates the air temperature at the outlet of the evaporator.
  • the subject of the invention is also a fluidic device arranged to be mounted in a motor vehicle thermal system (1), in particular an air conditioning system, this fluidic device comprising:
  • the frigory storage unit (22) and the fluid component being carried by a common support.
  • the common support of the invention makes it possible in particular to group together the components of which it serves as a support and hydraulic circuit in a restricted volume and allows the interfaces to be grouped together for easy mounting on an existing air conditioning loop of a vehicle.
  • the invention generally makes it possible to gain compactness.
  • the fluidic component is chosen from: a pump, a multiport valve, an interface flange.
  • the device comprises, in addition to the cold storage unit, at least several fluidic components which are a pump, at least one multichannel valve and at least one interface flange. According to one aspect of the invention, the device comprises at least three interface flanges.
  • the device comprises exactly three interface flanges, one being arranged to be connected to an inlet of an evaporator of the air conditioning system, one of the other flanges being arranged to be connected to the outlet of the evaporator and the last of the flanges being connected to an internal exchanger of the air conditioning system.
  • the flange arranged to be connected to the inlet of the evaporator and that arranged to be connected to the outlet of the evaporator are disposed on the same face of the fluidic device, preferably side by side .
  • the flange arranged to be connected to the inlet of the evaporator and that arranged to be connected to the outlet of the evaporator are disposed on two different faces of the fluidic device, in particular two substantially perpendicular faces. one to the other.
  • the flange connected to the internal exchanger of the air conditioning system is disposed on a different face of the face associated with the other two flanges.
  • the flange arranged to be connected to the inlet of the evaporator is disposed on the side of the frigory storage unit.
  • the flange arranged to be connected to the inlet of the evaporator is disposed on the opposite side to the frigory storage unit.
  • the device comprises two bypass valves (35, 36) arranged to selectively prevent the exchange of refrigerant between the cold storage unit and a main thermal circuit, each valve being a 2-way valve.
  • the device comprises a bypass valve (35b), which is a 3-way valve, arranged to selectively prevent the exchange of refrigerant between the frigory storage unit and a main thermal circuit.
  • the common support comprises at least one plate, preferably formed by a machined part, in particular aluminum or PPS.
  • At least one of the interface flanges is made in one piece with the rest of the support.
  • the common support comprises at least one housing arranged to at least partially receive a bypass valve. According to one aspect of the invention, the common support comprises at least one housing arranged to receive at least partially a refrigerant pump.
  • the common support comprises at least one channel forming a fluidic circuit in fluid communication at least with one of the interface flanges.
  • the common support comprises at least one housing arranged to receive at least partially the frigory storage unit.
  • the device comprises a cover arranged to attach to the common support and to cover at least partially the support.
  • the fluidic device comprises four interface flanges and an electronic expansion unit.
  • one of the flanges is arranged to be arranged between the expansion unit (EXV) and an internal exchanger.
  • one of the other flanges is arranged to be disposed between the expansion unit and an evaporator of the main circuit. According to one aspect of the invention, one of the other flanges is arranged to be disposed between the cold storage unit and the evaporator of the main circuit.
  • one of the flanges is arranged to be arranged between the frigory storage unit and the internal exchanger.
  • the fluidic device comprises an internal heat exchanger, still sometimes referred to as IHX.
  • the internal heat exchanger is arranged to communicate with an interface flange connected to a condenser of the main circuit and an interface flange connected to a compressor of this main circuit.
  • the electronic expansion unit is disposed on the side of the valve (s) of the fluidic device.
  • the electronic expansion unit is disposed on the side of the frigory storage unit.
  • the 3-way valve is in fluid communication with the flange, between this interface and the frigory storage unit.
  • the 3-way valve is replaced by two 2-way valves.
  • FIG. 1 illustrates, schematically and partially, a first embodiment of the system according to the invention
  • FIGS. 2 to 4 illustrate the system of FIG. 1 during different modes of operation
  • FIG. 5 illustrates, schematically and partially, a second embodiment of the system according to the invention
  • FIG. 6 schematically and partially illustrates a third embodiment of the system according to the invention
  • FIG. 7 illustrates an operation of the system of FIG.
  • FIGS. 2a, 3a and 4a are Mollier diagrams corresponding to the operating phases of FIGS. 2, 3 and 4, respectively,
  • FIG. 4b illustrates the so-called "cold boost” mode
  • FIGS. 5a-5c illustrate other embodiments of the invention
  • FIG. 1 represents an air conditioning system 1 which comprises, according to the direction of closed-circuit circulation of a refrigerant such as R134A: a compressor 2, a condenser 3, a storage bottle 4, an internal heat exchanger 5, an expansion or expansion device 6 and an evaporator on the air 10. These components form a main thermal circuit 20.
  • a refrigerant such as R134A: a compressor 2, a condenser 3, a storage bottle 4, an internal heat exchanger 5, an expansion or expansion device 6 and an evaporator on the air 10.
  • the internal heat exchanger 5 is placed at the interface between the high pressure and low pressure circuits.
  • the evaporator 10 is placed in an air circulation duct leading to different areas of the passenger compartment to be cooled or heated, such as an area for demisting the windscreen, a ventilation zone and a foot zone. .
  • the compressor 2 is arranged to compress the refrigerant circulating in this circuit 20 and the evaporator 10 is arranged to cool a flow of air flowing in contact with the evaporator, this cooling being obtained by heat exchange between the flow of air to be cooled and refrigerant circulating in this evaporator.
  • the system 1 further comprises a secondary thermal device 21 comprising a frigory storage unit 22, an expansion or pressure loss device 27 and a pump 23, this secondary device being arranged in such a way as:
  • the storage unit 22 can be maintained at a pressure lower than that of the evaporator when it is filled with frigories,
  • Figures 2a, 3a and 4a are Mollier diagrams corresponding to the phases of operation of Figures 2, 3 and 4, respectively.
  • Figures 3 and 3a correspond to the storage mode.
  • Figures 4 and 4a correspond to the rendering mode.
  • the secondary thermal device 21 comprises a first bypass valve 25 or 35 or 37, arranged to selectively prevent refrigerant circulation between the cold storage unit 22 and the main thermal circuit 20, in normal mode.
  • the secondary thermal device 21 is arranged so that:
  • cold boost mode namely in operating mode of the secondary thermal device for restoring frigories to the evaporator of the thermal circuit main, whose compressor operates at low or high load, the cold storage unit is traversed by refrigerant and the pump is running (see Figure 4b).
  • the pump 23 In the frigory storage phase in the frigory storage unit 22 (FIG. 3), the pump 23 is arranged to be bypassed and is then stopped.
  • the secondary thermal device 21 is arranged so that the direction of circulation of the refrigerant in the frigory storage unit 22 is reversed respectively:
  • this frigory storage unit 22 receives frigories of the refrigerant which passes through it (phase of storage of frigories illustrated in FIG. 3) and
  • the bypass of the circuit is carried out by the valve 36, the expansion in the frigory storage unit 22 by the valve 35 and the insulation of the frigory storage unit 22 by the valve 35 and the valve anti-return 37.
  • the first bypass valve 25 is a 3-way valve arranged at a junction between the secondary thermal device 21 and the main thermal circuit 20.
  • valve 25 prevents the flow to the secondary thermal device 21 which is not used.
  • valve 25 allows circulation of the frigory storage unit 22 to the compressor 2.
  • the valve 25 allows the evaporator 10 to flow to the frigory storage unit 22.
  • the secondary thermal device 21 comprises a second bypass valve 27, which is a two-way valve, arranged to be traversed selectively by refrigerant which flows from the evaporator 10 of the main thermal circuit to the frigory storage unit 22 to allow to transfer frigories of the refrigerant to the frigory storage unit via a trigger in this valve.
  • the valve 27 is blocking in the operating phases of Figures 2 and 4, and passing in the operating phase of Figure 3.
  • the second bypass valve 27 is arranged to generate two pressure levels respectively for the evaporator 10 and the storage unit 22.
  • This second bypass valve may be a variable flow section valve, a single passage section valve or a 3-way valve (35b).
  • the secondary thermal device 21 comprises a secondary branch 28 on which this second bypass valve 27 is arranged, this branch 28 making a fluid junction 30 with a primary branch 29 on which the frigory storage unit 22 and the pump 23 are arranged. This junction 30 between the primary branch 28 and the secondary branch 29 is arranged between the frigory storage unit 22 and the pump 23.
  • the secondary thermal device 21 comprises a non-return valve 31 disposed on the primary branch 29 downstream of the pump 23.
  • the secondary thermal device 21 is arranged such that the direction of circulation of the refrigerant in the frigory storage unit 22 is the same, respectively:
  • this frigory storage unit 22 restores frigories to the refrigerant that passes through it.
  • One of the bypass and expansion valves 35 is arranged at the inlet of the cold storage unit 22, on a primary branch 29.
  • the other of the bypass valves 36 is disposed between the evaporator 10 and the pump 23, on a secondary branch 28.
  • the valves 35 and 36 can be replaced by a 3-way valve 35b (see Figure 5a).
  • a check valve 37 is disposed at the outlet of the frigory storage unit 22.
  • the cold storage unit 22 is arranged to be at a lower pressure than that of the evaporator.
  • An expansion device 39 is arranged upstream of the evaporator 10 to generate an expansion of the refrigerant before it passes through the evaporator 10.
  • the frigory storage unit 22 is arranged inside an HVAC or outside an HVAC.
  • the system comprises an air channel 40 arranged parallel to the evaporator 10, a channel through which air can circulate bypassing the evaporator 10, and this air may, at the outlet of this path, mix with the air from the evaporator.
  • the position of the valve 27 downstream of the evaporator can help to adjust the temperature of the air at the outlet of the evaporator by mixing the cold air coming from the evaporator and the warmer air coming from the evaporator. see above air. This is advantageous during the frigory storage phase.
  • the valve may be for example a simple closing valve with a fixed diameter.
  • the 2-way valve referenced 27 is for example arranged to generate a fixed pressure drop so as to protect the evaporator from ice formation.
  • the refrigerant may be a material, in this case a fluid, with a phase change for working in latent heat in order to reduce the necessary mass and to limit the temperature variations of the storage.
  • the refrigerant is a two-phase fluid type R134a or 1234yf.
  • the frigory storage unit may contain a phase change material to limit temperature variations.
  • valves 27 or 35 provide an intermediate expansion so that the pressure of the compressor and that of the storage unit are different.
  • the pressure and temperature of the refrigerant being linked, so to continue to blow air at the right temperature for the passengers, it is necessary to limit the variation of pressure.
  • the conduit leading the refrigerant flow of the cold storage unit 22 to the pump 23 may be located downstream or upstream of the check valve or check valve 37 thus allowing the refrigerant pump to be disposed directly at the outlet of the frigory storage unit.
  • the invention provides a fluidic device 50 which is easily manipulated.
  • the fluidic device 50 groups together certain components of the system described in FIG. 5a and comprises:
  • the frigory storage unit 22 and the fluid component are carried by a common support 60 as can be seen in FIGS. 14 and 15.
  • the fluidic device 50 has three interface flanges 61, 62 and
  • the flange 63 is arranged to be connected to an inlet of the evaporator 10 of the air conditioning system.
  • the flange 62 is arranged to be connected to the outlet of the evaporator
  • the flange 61 is connected to the internal exchanger 5 of the air conditioning system.
  • the flange 63 arranged to be connected to the inlet of the evaporator and the one 61 arranged to be connected to the outlet of the evaporator are disposed on the same face of the fluidic device, preferably side by side, as illustrated in Figure 15.
  • the flange 63 arranged to be connected to the inlet of the evaporator and the flange 61 arranged to be connected to the outlet of the evaporator are arranged on two different faces of the fluidic device 50, in particular two faces 65 and 66 substantially perpendicular to each other.
  • the flange 62 connected to the internal exchanger of the air conditioning system is disposed on a different face of the face associated with the other two flanges 61 and 63.
  • the flange 63 arranged to be connected to the inlet of the evaporator is disposed on the side of the frigory storage unit 22, as in the example of FIG. 9.
  • the flange 63 arranged to be connected to the inlet of the evaporator is disposed on the opposite side to the frigory storage unit, as in the example of Figure 10.
  • the common support 60 comprises at least one plate, preferably formed by a machined part, in particular aluminum or PPS.
  • All the flanges 61, 62 and 63 are made in one piece with the rest of the support 60.
  • the common support 60 comprises housings each arranged to at least partially receive the valve 35b, the pump 23, the valves 37 and the frigory storage unit 22, as can be seen in FIGS. 14 and 15.
  • the device comprises a cover 69 arranged to attach to the common support and to at least partially cover the support 60.
  • FIGS. 11 to 13 respectively illustrate the embodiments of FIGS. 8 to 10, with the 3-way valve replaced by two 2-way valves 27.
  • the fluidic device comprises four interface flanges 101 to 104 and an electronic expansion unit 105 still sometimes called under the symbol EXV.
  • the flange 101 is arranged to be disposed between the expansion unit 105 and the internal exchanger of the main circuit.
  • the flange 102 is arranged to be disposed between the expansion unit 105 and an evaporator 10 of the main circuit.
  • the flange 103 is arranged to be disposed between the cold storage unit 22 and the evaporator 10 of the main circuit.
  • the flange 104 is arranged to be arranged between the frigory storage unit 22 and the internal exchanger 5.
  • the expansion unit 105 is on the same side as the 3-way valve 35b.
  • the detent unit 105 is on the side of the frigory storage unit 22, and not on the side of the 3-way valve.
  • Figures 18 and 19 show alternatives respectively to Figures 16 and 17 with the 3-way valves replaced by two 2-way valves.
  • the components 101 - 105, the unit 22, the pump 23 and the valve 35b are carried by the common support 60.
  • the fluidic device 50 comprises an internal heat exchanger 5, sometimes sometimes referred to as IHX.
  • the internal heat exchanger 5 is arranged to communicate with an interface flange 104 connected to a condenser of the main circuit and an interface flange 101 connected to a compressor of this main circuit.
  • the electronic expansion unit 105 is disposed on the side of the valve (s) of the fluidic device, as illustrated in FIG.
  • the electronic expansion unit 105 is disposed on the side of the cold storage unit 22.
  • the 3-way valve is in fluid communication with the flange 103, between this interface and the unit. cold storage.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention relates to a fluid-flow device (50) arranged to be mounted in a motor vehicle thermal system (1), in particular an air conditioning system, this fluid-flow device comprising: - a frigorie storage unit (22), - at least one fluid-flow component other than the frigorie storage unit (22), this component being fluidically connected to the storage unit such that a circulation of heat transfer fluid (or refrigerating fluid) is made possible between the frigorie storage unit and the component, the frigorie storage unit (22) and the fluid-flow component being supported by a common holder (60).

Description

Système thermique, notamment un système de climatisation de véhicule automobile  Thermal system, in particular an automobile air-conditioning system
L'invention se rapporte à un système thermique de véhicule automobile, notamment un système de climatisation de véhicule automobile. The invention relates to a thermal system for a motor vehicle, in particular an air-conditioning system for a motor vehicle.
Actuellement, les appareils de ventilation, de chauffage et/ou de climatisation pour habitacle de véhicule automobile comprennent de manière générale une boucle thermodynamique fermée comprenant au moins, selon le sens de circulation d'un fluide réfrigérant, un évaporateur sur l'air, un compresseur, un condenseur et une vanne ou dispositif de détente. Dans cette configuration, l'air est refroidi par passage sur l'évaporateur avant d'être expulsé vers l'habitacle par des canalisations. At present, ventilating, heating and / or air-conditioning apparatus for a passenger compartment of a motor vehicle generally comprise a closed thermodynamic loop comprising at least, according to the direction of circulation of a cooling fluid, an evaporator on the air, a compressor, a condenser and a valve or expansion device. In this configuration, the air is cooled by passing on the evaporator before being expelled to the passenger compartment by pipes.
Ces appareils de ventilation fonctionnent grâce à l'entraînement du compresseur de climatisation par le moteur à combustion interne, dont le rendement varie beaucoup en fonction de son régime et de sa charge (faible rendement au ralenti, bon rendement en accélération et pas de consommation décélération) ; ainsi pour une charge donnée au compresseur de climatisation, le véhicule automobile surconsommera plus ou moins de carburant These ventilation units operate thanks to the drive of the air-conditioning compressor by the internal combustion engine, the output of which varies greatly according to its speed and its load (low idle efficiency, good acceleration efficiency and no consumption deceleration). ); thus for a given load to the air conditioning compressor, the motor vehicle will overconsumption more or less fuel
Aussi, à l'arrêt du véhicule, les appareils de ventilation sont peu performants, voire ne fonctionnent pas du tout. Also, when the vehicle stops, the ventilation devices are poor, or do not work at all.
De plus, dans les véhicules récents qui sont équipés d'un système de gestion du moteur appelé « Stop and Go » (« arrêt et redémarrage »), c'est-à-dire arrêt du moteur à combustion interne lorsque le véhicule est au point mort, par exemple à un feu ou à un stop, puis redémarrage de celui-ci lorsque l'avance du véhicule est de nouveau souhaitée, grâce à un alternodémarreur, le moteur ne peut plus entraîner le compresseur lorsque le moteur est arrêté. La climatisation est donc fréquemment interrompue, ce qui nuit au confort général des passagers. In addition, in newer vehicles that are equipped with an engine management system called "Stop and Go", that is, stopping the internal combustion engine when the vehicle is at neutral, for example to a fire or a stop, then restart of it when the advance of the vehicle is again desired, thanks to an alternator starter, the engine can not drive the compressor when the engine is stopped. Air conditioning is frequently interrupted, which affects the overall comfort of passengers.
D'une manière générale, il existe un besoin pour pouvoir gérer la climatisation en minimisant la consommation de carburant du véhicule. II est connu de la demande brevet US20100018231 un stockage de frigories dans un évaporateur du système de climatisation. In general, there is a need to be able to manage the air conditioning by minimizing the fuel consumption of the vehicle. It is known from patent application US20100018231 a storage of frigories in an evaporator of the air conditioning system.
Cependant stocker les frigories dans l'évaporateur de l'appareil de ventilation (HVAC) implique la présence de matériaux à changement de phase (PCM) qui amoindrit ses performances, augmente sa taille en conséquence et ne permet pas de contrôler le moment désiré pour la restitution des frigories. However storing the frigories in the evaporator of the ventilation apparatus (HVAC) implies the presence of phase change materials (PCM) which reduces its performance, increases its size accordingly and does not allow to control the desired moment for the restitution of the frigories.
Afin de palier ces problèmes, d'autres documents JP2000313226, US7228705, US20030159455 et WO2014012873 décrivent des stockages de frigories dans des systèmes extérieurs au HVAC. Parmi ces systèmes extérieurs, on distingue des systèmes dits « en parallèle » comme JP2000313226, où une portion de débit réfrigérant circulant vers l'évaporateur circule vers un dispositif de stockage, d'autres systèmes dits « en série » comme dans les documents US7228705, US20030159455 , WO2014012873 et JP2009229014 où la totalité du débit réfrigérant peut circuler vers un dispositif de stockage à la sortie de l'évaporateur. In order to overcome these problems, other documents JP2000313226, US7228705, US20030159455 and WO2014012873 describe storing frigories in systems outside the HVAC. Among these external systems, there are so-called "parallel" systems such as JP2000313226, where a portion of refrigerant flow flowing towards the evaporator flows to a storage device, other systems called "in series" as in documents US7228705, US20030159455, WO2014012873 and JP2009229014 where the entire refrigerant flow can flow to a storage device at the outlet of the evaporator.
Les meilleurs systèmes décrits dans ces documents sont les systèmes qui combinent l'architecture série, pour la réactivité en mode stockage, la présence d'une pompe de réfrigérant pour l'efficacité en mode restitution, et la présence d'une dérivation ou by-pass pour l'isolation du dispositif de stockage en mode de fonctionnement dit « normal » de la boucle de climatisation. The best systems described in these documents are the systems that combine the serial architecture, for the reactivity in storage mode, the presence of a refrigerant pump for efficiency in the restitution mode, and the presence of a bypass or by-pass. pass for the insulation of the storage device in "normal" operating mode of the air conditioning loop.
Cependant dans toutes ces architectures, le niveau de pression régnant dans les dispositifs de stockage est équivalent à celui de l'évaporateur, à sa perte de charge près, ce qui est pénalisant pendant la phase de stockage. However, in all these architectures, the pressure level prevailing in the storage devices is equivalent to that of the evaporator at its pressure drop, which is penalizing during the storage phase.
L'invention a ainsi pour objet un système thermique de véhicule automobile, notamment un système de climatisation de véhicule automobile, ce système comportant : The subject of the invention is thus a thermal system for a motor vehicle, in particular an air-conditioning system for a motor vehicle, this system comprising:
un circuit thermique principal comportant un compresseur agencé pour comprimer un réfrigérant circulant dans ce circuit et un évaporateur agencé pour refroidir un flux d'air qui circule au contact de l'évaporateur, ce refroidissement étant obtenu par échange thermique entre le flux d'air à refroidir et du réfrigérant circulant dans cet évaporateur,  a main thermal circuit comprising a compressor arranged to compress a refrigerant circulating in this circuit and an evaporator arranged to cool a flow of air flowing in contact with the evaporator, this cooling being obtained by heat exchange between the air flow to cool and refrigerant circulating in this evaporator,
un dispositif thermique secondaire comprenant une unité de stockage de frigories, un dispositif créant une détente entre la sortie de l'évaporateur et l'entrée de l'unité de stockage de frigories, et une pompe, ce dispositif secondaire étant agencé de manière :  a secondary thermal device comprising a frigory storage unit, a device creating a detent between the outlet of the evaporator and the inlet of the frigory storage unit, and a pump, this secondary device being arranged in a manner:
o à établir une pression dans l'unité de stockage de frigories à un niveau inférieur à la pression dans l'évaporateur lorsque le système est en mode de stockage,  o to establish a pressure in the frigory storage unit at a level lower than the pressure in the evaporator when the system is in storage mode,
o à réguler l'écart de pression entre l'unité de stockage de frigories et l'évaporateur en fonction des conditions d'utilisation,  o to regulate the pressure difference between the frigory storage unit and the evaporator according to the conditions of use,
o à empêcher l'échange de fluide réfrigérant entre l'unité de stockage et le circuit thermique principal lorsque le système est en mode normal,  o to prevent the exchange of refrigerant between the storage unit and the main thermal circuit when the system is in normal mode,
o être relié, de préférence en série, à l'évaporateur du circuit thermique principal lorsque le compresseur du circuit thermique principal est à l'arrêt ou fonctionne à faible régime de sorte que du réfrigérant provenant de l'unité de stockage de frigories soit envoyé, à l'aide de la pompe, à travers l'évaporateur du circuit thermique principal. o be connected, preferably in series, to the evaporator of the main thermal circuit when the compressor of the main thermal circuit is at a standstill or is operating at low speed so that refrigerant from the frigory storage unit is sent, using the pump, through the evaporator of the main thermal circuit.
Grâce à l'invention, qui est notamment d'empêcher l'échange de fluide réfrigérant entre le dispositif thermique secondaire et le circuit thermique principal pendant le fonctionnement normal, ce fonctionnement normal n'est pas affecté par un passage non souhaité de réfrigérant à travers l'unité de stockage de frigories, ce qui aurait eu pour conséquence de réduire les performances de la climatisation. Cela permet également de ne pas dégrader les performances de l'unité de stockage car il est maintenu à une pression inférieure à celle de l'évaporateur lorsqu'il est rempli de frigories. Thanks to the invention, which is in particular to prevent the exchange of refrigerant between the secondary thermal device and the main thermal circuit during normal operation, this normal operation is not affected by an unwanted passage of refrigerant through the cold storage unit, which would have had the effect of reducing the performance of air conditioning. This also makes it possible not to degrade the performance of the storage unit because it is maintained at a pressure lower than that of the evaporator when it is filled with frigories.
Le fait que l'unité de stockage de frigories soit en série avec l'évaporateur permet de profiter pleinement du débit de réfrigérant pendant une phase de stockage de frigories dans cette unité. The fact that the cold storage unit is in series with the evaporator makes it possible to take full advantage of the refrigerant flow during a phase of storage of frigories in this unit.
Selon un aspect de l'invention, la pompe est agencée de manière à être contournée lorsque l'unité de stockage de frigories reçoit des frigories du réfrigérant qui le traverse. La pompe est alors à l'arrêt. According to one aspect of the invention, the pump is arranged to be bypassed when the frigory storage unit receives frigories of the refrigerant which passes through it. The pump is then stopped.
Selon un aspect de l'invention, le dispositif thermique secondaire comporte au moins une première vanne de dérivation agencée pour sélectivement empêcher la circulation de réfrigérant entre l'unité de stockage de frigories et le circuit thermique principal en mode normal. According to one aspect of the invention, the secondary thermal device comprises at least a first bypass valve arranged to selectively prevent refrigerant circulation between the frigory storage unit and the main thermal circuit in normal mode.
Selon un aspect de l'invention, le dispositif thermique secondaire est agencé de sorte que le sens de circulation du réfrigérant dans l'unité de stockage de frigories soit inversé respectivement : - lorsque cette unité de stockage de frigories reçoit des frigories du réfrigérant qui la traverse et According to one aspect of the invention, the secondary thermal device is arranged so that the flow direction of the refrigerant in the cold storage unit is reversed respectively: when this frigory storage unit receives frigories of the refrigerant which passes through it and
- lorsque cette unité de stockage de frigories restitue des frigories au réfrigérant qui la traverse.  when this cold storage unit returns frigories to the refrigerant which passes through it.
Selon un aspect de l'invention, la première vanne de dérivation est une vanne 3 voies disposée à une jonction entre le dispositif thermique secondaire et le circuit thermique principal. Cette vanne 3 voies peut être remplacée par deux vannes 2 voies, si on le souhaite. Selon un aspect de l'invention, le dispositif thermique secondaire comporte une deuxième vanne de dérivation, notamment une vanne deux voies, agencée pour être traversée sélectivement par du réfrigérant qui circule de l'évaporateur du circuit thermique principal vers l'unité de stockage de frigories pour permettre une détente qui va transférer des frigories du réfrigérant vers l'unité de stockage de frigories en mode stockage. According to one aspect of the invention, the first bypass valve is a 3-way valve arranged at a junction between the secondary thermal device and the main thermal circuit. This 3-way valve can be replaced by two 2-way valves, if desired. According to one aspect of the invention, the secondary thermal device comprises a second bypass valve, in particular a two-way valve, arranged to be traversed selectively by refrigerant which flows from the evaporator of the main thermal circuit to the storage unit of frigories to allow a relaxation that will transfer frigories of the refrigerant to the storage unit of frigories in storage mode.
Selon un aspect de l'invention, le dispositif thermique secondaire comporte une branche secondaire sur laquelle est disposée cette deuxième vanne de dérivation, cette branche faisant jonction fluidique avec une branche primaire sur laquelle sont disposées l'unité de stockage de frigories et la pompe. According to one aspect of the invention, the secondary thermal device comprises a secondary branch on which is disposed this second bypass valve, this branch making fluid junction with a primary branch on which are arranged the cold storage unit and the pump.
Selon un aspect de l'invention, cette jonction entre la branche primaire et la branche secondaire est disposée entre l'unité de stockage de frigories et la pompe. Selon un aspect de l'invention, le dispositif thermique secondaire comporte une vanne anti-retour disposée sur la branche primaire en aval de la pompe. Ce clapet ou vanne anti-retour peut être intégré dans la pompe. Selon un aspect de l'invention, le dispositif thermique secondaire est agencé de sorte que : According to one aspect of the invention, this junction between the primary branch and the secondary branch is disposed between the frigory storage unit and the pump. According to one aspect of the invention, the secondary thermal device comprises a non-return valve disposed on the primary branch downstream of the pump. This valve or non-return valve can be integrated in the pump. According to one aspect of the invention, the secondary thermal device is arranged so that:
- En mode de fonctionnement du circuit thermique principal sans utilisation du dispositif thermique secondaire, l'unité de stockage de frigories est contournée et la pompe est à l'arrêt. - In operating mode of the main thermal circuit without use of the secondary thermal device, the cold storage unit is bypassed and the pump is stopped.
- En mode de fonctionnement du circuit thermique principal avec recharge en frigories de l'unité de stockage de frigories du dispositif thermique secondaire par détente à travers le dispositif de détente, l'unité de stockage de frigories est parcouru par du réfrigérant et la pompe est à l'arrêt, l'unité de stockage et l'évaporateur étant de préférence en série, - In operating mode of the main thermal circuit with charging in frigories of the cold storage unit of the secondary thermal device by expansion through the expansion device, the cold storage unit is traversed by refrigerant and the pump is when stationary, the storage unit and the evaporator being preferably in series,
- En mode de fonctionnement du dispositif thermique secondaire pour restituer des frigories à l'évaporateur du circuit thermique principal, dont le compresseur est à l'arrêt ou fonctionne à faible régime, l'unité de stockage de frigories est parcouru par du réfrigérant et la pompe est en marche,  - In operating mode of the secondary thermal device to return frigories to the evaporator of the main thermal circuit, the compressor is stopped or runs at low speed, the refrigerant storage unit is traversed by refrigerant and the pump is running,
- En mode dit « cold boost », à savoir en mode de fonctionnement du dispositif thermique secondaire pour restituer des frigories à l'évaporateur du circuit thermique principal, dont le compresseur fonctionne à faible ou forte charge, l'unité de stockage de frigories est parcouru par du réfrigérant et la pompe est en marche.  In so-called "cold boost" mode, namely in operating mode of the secondary thermal device to restore frigories to the evaporator of the main thermal circuit, whose compressor operates at low or high load, the cold storage unit is refrigerant and the pump is running.
Selon un aspect de l'invention, le dispositif thermique secondaire est agencé de sorte que le sens de circulation du réfrigérant dans l'unité de stockage de frigories soit le même respectivement : According to one aspect of the invention, the secondary thermal device is arranged so that the flow direction of the refrigerant in the cold storage unit is the same respectively:
- lorsque cette unité de stockage de frigories reçoit des frigories du réfrigérant qui la traverse et  when this frigory storage unit receives frigories of the refrigerant which passes through it and
- lorsque cette unité de stockage de frigories restitue des frigories au réfrigérant qui la traverse. Selon un aspect de l'invention, une vanne anti-retour est disposée à la sortie de l'unité de stockage de frigories. when this cold storage unit returns frigories to the refrigerant which passes through it. According to one aspect of the invention, a non-return valve is disposed at the outlet of the frigory storage unit.
Selon un aspect de l'invention, deux vannes de dérivation sont prévues. Selon un aspect de l'invention, l'une des vannes de dérivation est disposée à l'entrée de l'unité de stockage de frigories, sur une branche primaire, et permet une détente. According to one aspect of the invention, two bypass valves are provided. According to one aspect of the invention, one of the bypass valves is disposed at the entrance of the frigory storage unit, on a primary branch, and allows relaxation.
Selon un aspect de l'invention, l'autre des vannes de dérivation est disposée entre l'évaporateur et la pompe, sur une branche secondaire pour permettre la dérivation, ou by-pass, de l'unité de stockage de frigories en mode normal. According to one aspect of the invention, the other of the bypass valves is arranged between the evaporator and the pump, on a secondary branch to allow the bypass, or bypass, of the cold storage unit in normal mode .
Selon un aspect de l'invention, les deux vannes de dérivation peuvent être remplacées par une vanne 3 voies. According to one aspect of the invention, the two bypass valves can be replaced by a 3-way valve.
Selon un aspect de l'invention, le conduit menant le débit de réfrigérant de l'unité de stockage de frigories à la pompe peut être situé en aval ou en amont de la vanne anti-retour permettant ainsi à la pompe réfrigérant d'être disposée directement à la sortie de l'unité de stockage de frigories. According to one aspect of the invention, the conduit leading the refrigerant flow from the cold storage unit to the pump can be located downstream or upstream of the non-return valve thus allowing the refrigerant pump to be arranged. directly at the outlet of the frigory storage unit.
Selon un aspect de l'invention, l'unité de stockage de frigories est agencée pour être à une pression inférieure à celle de l'évaporateur. According to one aspect of the invention, the frigory storage unit is arranged to be at a lower pressure than the evaporator.
Selon un aspect de l'invention, la deuxième vanne de dérivation disposée entre l'évaporateur et l'unité de stockage de frigories est agencée pour générer deux niveaux de pression respectivement pour l'évaporateur et l'unité de stockage. Selon un aspect de l'invention, cette deuxième vanne de dérivation peut être une vanne de section de passage variable, une vanne de section de passage unique ou une vanne trois voies. Cette vanne peut être une vanne on/off qui précède un orifice calibré. Pour maintenir le confort des passagers inchangé, la pression doit rester stable au niveau de l'évaporateur. According to one aspect of the invention, the second bypass valve disposed between the evaporator and the frigory storage unit is arranged to generate two pressure levels respectively for the evaporator and the storage unit. According to one aspect of the invention, this second bypass valve may be a variable passage section valve, a single passage section valve or a three way valve. This valve can be an on / off valve that precedes a calibrated orifice. To maintain the comfort of passenger unchanged, the pressure must remain stable at the evaporator.
Alors selon les conditions et pour pouvoir maximiser le stockage sans altérer le confort des passagers, il est possible d'avoir à changer la section de passage de la vanne alors sa perte de charge. De cette façon les pressions et les températures seront contrôlées. So depending on the conditions and to maximize storage without altering the comfort of passengers, it is possible to have to change the passage section of the valve then its pressure drop. In this way pressures and temperatures will be controlled.
Selon un aspect de l'invention, un dispositif d'expansion, soit thermostatique soit électrique, est disposé en amont de l'évaporateur pour générer une détente du réfrigérant avant que celui-ci ne traverse l'évaporateur. According to one aspect of the invention, an expansion device, either thermostatic or electrical, is arranged upstream of the evaporator to generate an expansion of the refrigerant before it passes through the evaporator.
Selon un aspect de l'invention, l'ouverture de ce dispositif d'expansion est contrôlée par une surchauffe à l'entrée d'un échangeur thermique interne ou à l'entrée du compresseur ou à la sortie de l'évaporateur. Selon un aspect de l'invention, l'unité de stockage de frigories est agencée à l'intérieur d'un HVAC ou à l'extérieur d'un HVAC. According to one aspect of the invention, the opening of this expansion device is controlled by overheating at the inlet of an internal heat exchanger or at the compressor inlet or at the outlet of the evaporator. According to one aspect of the invention, the cold storage unit is arranged inside an HVAC or outside an HVAC.
Selon un aspect de l'invention, le système comporte une voie d'air disposée parallèle à l'évaporateur, voie à travers laquelle peut circuler de l'air contournant l'évaporateur, et cet air pouvant, en sortie de cette voie, se mélanger à l'air issu de l'évaporateur. La section de passage de cette voie est notamment contrôlée par un volet. Ce volet est notamment en parallèle à l'évaporateur. According to one aspect of the invention, the system comprises an air path disposed parallel to the evaporator, a path through which air can circulate bypassing the evaporator, and this air can, at the exit of this path, be mix with air from the evaporator. The passage section of this track is particularly controlled by a component. This flap is in particular in parallel with the evaporator.
Ainsi la position de la vanne en aval de l'évaporateur peut aider à ajuster la température de l'air à la sortie de l'évaporateur en mélangeant l'air froid issu de l'évaporateur et l'air plus chaud issu de la voie d'air précitée. Ceci est avantageux lors de la phase de stockage de frigories. La vanne peut être par exemple une vanne de fermeture simple avec un diamètre fixe. La vanne 2 voies est par exemple agencée pour générer une chute de pression fixe de manière à protéger l'évaporateur de la formation de glace. La vanne protège l'évaporateur du givrage, et le volet assure la régulation de la température d'air en sortie de l'évaporateur. Thus the position of the valve downstream of the evaporator can help to adjust the air temperature at the evaporator outlet by mixing the cold air from the evaporator and the warmer air coming from the track. aforementioned air. This is advantageous during the frigory storage phase. The valve may be for example a simple closing valve with a fixed diameter. The 2-way valve is, for example, arranged to generate a fixed pressure drop so as to protect the evaporator from the formation of ice. The valve protects the evaporator from icing, and the flap regulates the air temperature at the outlet of the evaporator.
L'invention a également pour objet un dispositif fluidique agencé pour être monté dans un système (1 ) thermique de véhicule automobile, notamment un système de climatisation, ce dispositif fluidique comportant : The subject of the invention is also a fluidic device arranged to be mounted in a motor vehicle thermal system (1), in particular an air conditioning system, this fluidic device comprising:
- une unité de stockage de frigories (22),  a unit for storing frigories (22),
- au moins un composant fluidique autre que l'unité de stockage de frigories (22), ce composant se raccordant fluidiquement à l'unité de stockage de manière à permettre une circulation de fluide caloporteur (ou fluide réfrigérant) entre l'unité de stockage de frigories et le composant,  at least one fluidic component other than the cold storage unit (22), this component being fluidly connected to the storage unit so as to allow circulation of coolant (or refrigerant) between the storage unit of frigories and the component,
l'unité de stockage de frigories (22) et le composant fluidique étant portés par un support commun. the frigory storage unit (22) and the fluid component being carried by a common support.
Le support commun de l'invention permet notamment de regrouper les composants dont il sert de support et de circuit hydraulique dans un volume restreint et permet un regroupement des interfaces entre elles pour un montage aisé sur une boucle de climatisation existante d'un véhicule. The common support of the invention makes it possible in particular to group together the components of which it serves as a support and hydraulic circuit in a restricted volume and allows the interfaces to be grouped together for easy mounting on an existing air conditioning loop of a vehicle.
L'invention permet d'une manière générale de gagner en compacité. The invention generally makes it possible to gain compactness.
Selon un aspect de l'invention, le composant fluidique est choisi parmi : une pompe, une vanne multivoies, une bride d'interface. According to one aspect of the invention, the fluidic component is chosen from: a pump, a multiport valve, an interface flange.
Selon un aspect de l'invention, le dispositif comporte, outre l'unité de stockage de frigories, au moins plusieurs composants fluidiques qui sont une pompe, au moins une vanne multivoies et au moins une bride d'interface. Selon un aspect de l'invention, le dispositif comporte au moins trois brides d'interface. According to one aspect of the invention, the device comprises, in addition to the cold storage unit, at least several fluidic components which are a pump, at least one multichannel valve and at least one interface flange. According to one aspect of the invention, the device comprises at least three interface flanges.
Selon un aspect de l'invention, le dispositif comporte exactement trois brides d'interface, l'une étant agencée pour être reliée à une entrée d'un évaporateur du système de climatisation, l'une des autres brides étant agencée pour être reliée à la sortie de l'évaporateur et la dernière des brides étant reliée à un échangeur interne du système de climatisation. According to one aspect of the invention, the device comprises exactly three interface flanges, one being arranged to be connected to an inlet of an evaporator of the air conditioning system, one of the other flanges being arranged to be connected to the outlet of the evaporator and the last of the flanges being connected to an internal exchanger of the air conditioning system.
Selon un aspect de l'invention, la bride agencée pour être reliée à l'entrée de l'évaporateur et celle agencée pour être reliée à la sortie de l'évaporateur sont disposées sur une même face du dispositif fluidique, de préférence côte à côte. According to one aspect of the invention, the flange arranged to be connected to the inlet of the evaporator and that arranged to be connected to the outlet of the evaporator are disposed on the same face of the fluidic device, preferably side by side .
Selon un aspect de l'invention, la bride agencée pour être reliée à l'entrée de l'évaporateur et celle agencée pour être reliée à la sortie de l'évaporateur sont disposées sur deux faces différentes du dispositif fluidique, notamment deux faces sensiblement perpendiculaires l'une à l'autre. According to one aspect of the invention, the flange arranged to be connected to the inlet of the evaporator and that arranged to be connected to the outlet of the evaporator are disposed on two different faces of the fluidic device, in particular two substantially perpendicular faces. one to the other.
Selon un aspect de l'invention, la bride reliée à l'échangeur interne du système de climatisation est disposée sur une face différente de la face associée aux deux autres brides. Selon un aspect de l'invention, la bride agencée pour être reliée à l'entrée de l'évaporateur est disposée du côté de l'unité de stockage de frigories. According to one aspect of the invention, the flange connected to the internal exchanger of the air conditioning system is disposed on a different face of the face associated with the other two flanges. According to one aspect of the invention, the flange arranged to be connected to the inlet of the evaporator is disposed on the side of the frigory storage unit.
Selon un aspect de l'invention, la bride agencée pour être reliée à l'entrée de l'évaporateur est disposée du côté opposé à l'unité de stockage de frigories. According to one aspect of the invention, the flange arranged to be connected to the inlet of the evaporator is disposed on the opposite side to the frigory storage unit.
Selon un aspect de l'invention, le dispositif comporte deux vannes de dérivation (35, 36) agencées pour sélectivement empêcher l'échange de réfrigérant entre l'unité de stockage de frigories et un circuit thermique principal, chaque vanne étant une vanne 2 voies. Selon un aspect de l'invention, le dispositif comporte une vanne de dérivation (35b), qui est une vanne 3 voies, agencée pour sélectivement empêcher l'échange de réfrigérant entre l'unité de stockage de frigories et un circuit thermique principal. Selon un aspect de l'invention, le support commun comporte au moins une platine, formée de préférence par une pièce usinée, notamment en aluminium ou PPS. According to one aspect of the invention, the device comprises two bypass valves (35, 36) arranged to selectively prevent the exchange of refrigerant between the cold storage unit and a main thermal circuit, each valve being a 2-way valve. . According to one aspect of the invention, the device comprises a bypass valve (35b), which is a 3-way valve, arranged to selectively prevent the exchange of refrigerant between the frigory storage unit and a main thermal circuit. According to one aspect of the invention, the common support comprises at least one plate, preferably formed by a machined part, in particular aluminum or PPS.
Selon un aspect de l'invention, l'une au moins des brides d'interface, notamment toutes les brides, est réalisée d'un seul tenant avec le reste du support. According to one aspect of the invention, at least one of the interface flanges, in particular all the flanges, is made in one piece with the rest of the support.
Selon un aspect de l'invention, le support commun comporte au moins un logement agencé pour recevoir au moins partiellement une vanne de dérivation. Selon un aspect de l'invention, le support commun comporte au moins un logement agencé pour recevoir au moins partiellement une pompe pour fluide frigorigène. According to one aspect of the invention, the common support comprises at least one housing arranged to at least partially receive a bypass valve. According to one aspect of the invention, the common support comprises at least one housing arranged to receive at least partially a refrigerant pump.
Selon un aspect de l'invention, le support commun comporte au moins un canal formant un circuit fluidique en communication fluidique au moins avec l'une des brides d'interface. According to one aspect of the invention, the common support comprises at least one channel forming a fluidic circuit in fluid communication at least with one of the interface flanges.
Selon un aspect de l'invention, le support commun comporte au moins un logement agencé pour recevoir au moins partiellement l'unité de stockage de frigories. According to one aspect of the invention, the common support comprises at least one housing arranged to receive at least partially the frigory storage unit.
Selon un aspect de l'invention, le dispositif comporte un capot agencé pour se fixer sur le support commun et pour recouvrir au moins partiellement le support. According to one aspect of the invention, the device comprises a cover arranged to attach to the common support and to cover at least partially the support.
Selon un aspect de l'invention, le dispositif fluidique comporte quatre brides d'interface et une unité de détente électronique. According to one aspect of the invention, the fluidic device comprises four interface flanges and an electronic expansion unit.
Selon un aspect de l'invention, l'une des brides est agencée pour être disposée entre l'unité de détente (EXV) et un échangeur interne. According to one aspect of the invention, one of the flanges is arranged to be arranged between the expansion unit (EXV) and an internal exchanger.
Selon un aspect de l'invention, l'une des autres brides est agencée pour être disposée entre l'unité de détente et un évaporateur du circuit principal. Selon un aspect de l'invention, l'une des autres brides est agencée pour être disposée entre l'unité de stockage de frigories et l'évaporateur du circuit principal. According to one aspect of the invention, one of the other flanges is arranged to be disposed between the expansion unit and an evaporator of the main circuit. According to one aspect of the invention, one of the other flanges is arranged to be disposed between the cold storage unit and the evaporator of the main circuit.
Selon un aspect de l'invention, l'une des brides est agencée pour être disposée entre l'unité de stockage de frigories et l'échangeur interne. According to one aspect of the invention, one of the flanges is arranged to be arranged between the frigory storage unit and the internal exchanger.
Selon un aspect de l'invention, le dispositif fluidique comporte un échangeur thermique interne, encore parfois appelé sous le sigle IHX. According to one aspect of the invention, the fluidic device comprises an internal heat exchanger, still sometimes referred to as IHX.
Selon un aspect de l'invention, l'échangeur interne est agencé pour communiquer avec une bride d'interface connectée à un condenseur du circuit principal et une bride d'interface connectée à un compresseur de ce circuit principal. According to one aspect of the invention, the internal heat exchanger is arranged to communicate with an interface flange connected to a condenser of the main circuit and an interface flange connected to a compressor of this main circuit.
Selon un aspect de l'invention, l'unité de détente électronique est disposé du côté du ou des vannes du dispositif fluidique. According to one aspect of the invention, the electronic expansion unit is disposed on the side of the valve (s) of the fluidic device.
Selon un aspect de l'invention, l'unité de détente électronique est disposée du côté de l'unité de stockage de frigories. According to one aspect of the invention, the electronic expansion unit is disposed on the side of the frigory storage unit.
Selon un aspect de l'invention, la vanne 3 voies est en communication fluidique avec la bride, entre cette interface et l'unité de stockage de frigories. According to one aspect of the invention, the 3-way valve is in fluid communication with the flange, between this interface and the frigory storage unit.
Selon un aspect de l'invention, la vanne 3 voies est remplacée par deux vannes 2 voies. According to one aspect of the invention, the 3-way valve is replaced by two 2-way valves.
L'invention sera mieux comprise et d'autres détails, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante faite à titre d'exemples non limitatifs en référence au dessin annexé dans lequel :  The invention will be better understood and other details, characteristics and advantages of the invention will become apparent on reading the following description given by way of nonlimiting example with reference to the appended drawing in which:
- la figure 1 illustre, schématiquement et partiellement, un premier mode de réalisation du système selon l'invention,  FIG. 1 illustrates, schematically and partially, a first embodiment of the system according to the invention,
- les figures 2 à 4 illustrent le système de la figure 1 lors de différents modes de fonctionnement, - la figure 5 illustre, schématiquement et partiellement, un deuxième mode de réalisation du système selon l'invention, FIGS. 2 to 4 illustrate the system of FIG. 1 during different modes of operation, FIG. 5 illustrates, schematically and partially, a second embodiment of the system according to the invention,
- la figure 6 illustre, schématiquement et partiellement, un troisième mode de réalisation du système selon l'invention,  FIG. 6 schematically and partially illustrates a third embodiment of the system according to the invention,
- la figure 7 illustre un fonctionnement du système de la figure FIG. 7 illustrates an operation of the system of FIG.
6, 6
les figures 2a, 3a et 4a sont des diagrammes de Mollier correspondant aux phases de fonctionnement des figures 2, 3 et 4, respectivement,  FIGS. 2a, 3a and 4a are Mollier diagrams corresponding to the operating phases of FIGS. 2, 3 and 4, respectively,
- la figure 4b illustre le mode dit « Cold boost »,  FIG. 4b illustrates the so-called "cold boost" mode,
- les figures 5a-5c illustrent d'autres modes de réalisation de l'invention,  FIGS. 5a-5c illustrate other embodiments of the invention,
- les figures 8 à 23 illustrent d'autres modes de réalisation de l'invention.  - Figures 8 to 23 illustrate other embodiments of the invention.
La figure 1 représente un système de climatisation 1 qui comprend, selon le sens de circulation en circuit fermé d'un fluide réfrigérant tel que du R134A : un compresseur 2, un condenseur 3, une bouteille de stockage 4, un échangeur thermique interne 5, un dispositif d'expansion ou de détente 6 et un évaporateur sur l'air 10. Ces composants forment un circuit thermique principal 20. FIG. 1 represents an air conditioning system 1 which comprises, according to the direction of closed-circuit circulation of a refrigerant such as R134A: a compressor 2, a condenser 3, a storage bottle 4, an internal heat exchanger 5, an expansion or expansion device 6 and an evaporator on the air 10. These components form a main thermal circuit 20.
L'échangeur interne 5 est placé à l'interface entre les circuits haute pression et basse pression. The internal heat exchanger 5 is placed at the interface between the high pressure and low pressure circuits.
L'évaporateur 10 est placé dans une conduite de circulation d'air aboutissant vers différentes zones de l'habitacle à refroidir ou à réchauffer telles qu'une zone pour le désembuage du pare-brise, une zone d'aération et une zone de pieds. The evaporator 10 is placed in an air circulation duct leading to different areas of the passenger compartment to be cooled or heated, such as an area for demisting the windscreen, a ventilation zone and a foot zone. .
Le compresseur 2 est agencé pour comprimer le réfrigérant circulant dans ce circuit 20 et l'évaporateur 10 est agencé pour refroidir un flux d'air qui circule au contact de l'évaporateur, ce refroidissement étant obtenu par échange thermique entre le flux d'air à refroidir et du réfrigérant circulant dans cet évaporateur. The compressor 2 is arranged to compress the refrigerant circulating in this circuit 20 and the evaporator 10 is arranged to cool a flow of air flowing in contact with the evaporator, this cooling being obtained by heat exchange between the flow of air to be cooled and refrigerant circulating in this evaporator.
Le système 1 comporte en outre un dispositif thermique secondaire 21 comprenant une unité de stockage de frigories 22, un dispositif de détente ou de perte de charge 27 et une pompe 23, ce dispositif secondaire étant agencé de manière : The system 1 further comprises a secondary thermal device 21 comprising a frigory storage unit 22, an expansion or pressure loss device 27 and a pump 23, this secondary device being arranged in such a way as:
o à établir une pression dans l'unité de stockage 22 à un niveau inférieur à la pression dans l'évaporateur 10 lorsque le système est en mode stockage (voir les figures 3 et 3a),  establishing a pressure in the storage unit 22 at a level below the pressure in the evaporator 10 when the system is in storage mode (see FIGS. 3 and 3a),
o à réguler l'écart de pression entre l'unité de stockage 22 et l'évaporateur en fonction des conditions d'utilisation, o à empêcher l'échange de fluide réfrigérant entre l'unité de stockage et le circuit thermique principal 20 lorsque le système est en mode normal, c'est à dire lorsque le compresseur 2 est en marche et l'évaporateur 10 refroidit le flux d'air (voir les figures 2 et 2a). Ainsi le l'unité de stockage 22 peut être maintenu à une pression inférieure à celle de l'évaporateur lorsqu'il est rempli de frigories,  o to regulate the pressure difference between the storage unit 22 and the evaporator as a function of the conditions of use, o to prevent the exchange of refrigerant between the storage unit and the main thermal circuit 20 when the system is in normal mode, ie when the compressor 2 is running and the evaporator 10 cools the air flow (see Figures 2 and 2a). Thus the storage unit 22 can be maintained at a pressure lower than that of the evaporator when it is filled with frigories,
o à être relié en série à l'évaporateur 10 du circuit thermique principal 20 lorsque le compresseur 2 du circuit thermique principal est à l'arrêt (mode restitution) de sorte que du réfrigérant provenant de l'unité de stockage de frigories 22 soit envoyé, à l'aide de la pompe 23, à travers l'évaporateur 10 du circuit thermique principal 20 ou bien (mode stockage) que du réfrigérant provenant de l'évaporateur soit envoyé vers l'unité de stockage de frigories 22 (voir les figures 4 et 4a), o à être en parallèle au compresseur en mode « cold boost » comme illustré sur la figure 4b. o to be connected in series to the evaporator 10 of the main thermal circuit 20 when the compressor 2 of the main thermal circuit is at a standstill (return mode) so that refrigerant from the frigory storage unit 22 is sent using the pump 23, through the evaporator 10 of the main thermal circuit 20 or (storage mode) that refrigerant from the evaporator is sent to the storage unit of frigories 22 (see the figures 4 and 4a), o to be in parallel with the compressor in "cold boost" mode as shown in Figure 4b.
Les figures 2a, 3a et 4a sont des diagrammes de Mollier correspondant aux phases de fonctionnement des figures 2, 3 et 4, respectivement. Figures 2a, 3a and 4a are Mollier diagrams corresponding to the phases of operation of Figures 2, 3 and 4, respectively.
Les figures 3 et 3a correspondent au mode de stockage. Les figures 4 et 4a correspondent au mode restitution. Figures 3 and 3a correspond to the storage mode. Figures 4 and 4a correspond to the rendering mode.
Le dispositif thermique secondaire 21 comporte une première vanne de dérivation 25 ou 35 ou 37, agencée pour sélectivement empêcher la circulation de réfrigérant entre l'unité de stockage de frigories 22 et le circuit thermique principal 20, en mode normal. The secondary thermal device 21 comprises a first bypass valve 25 or 35 or 37, arranged to selectively prevent refrigerant circulation between the cold storage unit 22 and the main thermal circuit 20, in normal mode.
Le dispositif thermique secondaire 21 est agencé de sorte que : The secondary thermal device 21 is arranged so that:
- En mode de fonctionnement du circuit thermique principal 20 sans utilisation du dispositif thermique secondaire 21 (voir figure 2), l'unité de stockage de frigories 22 est contournée et la pompe 23 est à l'arrêt,  - In operating mode of the main thermal circuit 20 without use of the secondary thermal device 21 (see Figure 2), the frigory storage unit 22 is bypassed and the pump 23 is stopped,
- En mode de fonctionnement du circuit thermique principal 20 avec recharge en frigories de l'unité de stockage de frigories 22 du dispositif thermique secondaire 21 (voir figure 3), l'unité de stockage de frigories 22 est parcouru par du réfrigérant et la pompe 23 est à l'arrêt,  - In operating mode of the main thermal circuit 20 with charging in frigories of the cold storage unit 22 of the secondary thermal device 21 (see Figure 3), the cold storage unit 22 is traversed by refrigerant and the pump 23 is stopped,
- En mode de fonctionnement du dispositif thermique secondaire 21 pour restituer des frigories à l'évaporateur du circuit thermique principal 20 (voir figure 4), dont le compresseur 2 est à l'arrêt, l'unité de stockage de frigories 22 est parcouru par du réfrigérant et la pompe 23 est en marche,  - In the operating mode of the secondary thermal device 21 to return frigories to the evaporator of the main thermal circuit 20 (see Figure 4), the compressor 2 is stopped, the frigory storage unit 22 is traversed by refrigerant and the pump 23 is running,
- En mode dit « cold boost », à savoir en mode de fonctionnement du dispositif thermique secondaire pour restituer des frigories à l'évaporateur du circuit thermique principal, dont le compresseur fonctionne à faible ou forte charge, l'unité de stockage de frigories est parcouru par du réfrigérant et la pompe est en marche (voir figure 4b). - In so-called "cold boost" mode, namely in operating mode of the secondary thermal device for restoring frigories to the evaporator of the thermal circuit main, whose compressor operates at low or high load, the cold storage unit is traversed by refrigerant and the pump is running (see Figure 4b).
Dans la phase de stockage de frigories dans l'unité de stockage de frigories 22 (figure 3), la pompe 23 est agencée de manière à être contournée et est alors à l'arrêt. In the frigory storage phase in the frigory storage unit 22 (FIG. 3), the pump 23 is arranged to be bypassed and is then stopped.
Le dispositif thermique secondaire 21 est agencé de sorte que le sens de circulation du réfrigérant dans l'unité de stockage de frigories 22 soit inversé respectivement : The secondary thermal device 21 is arranged so that the direction of circulation of the refrigerant in the frigory storage unit 22 is reversed respectively:
- lorsque cette unité de stockage de frigories 22 reçoit des frigories du réfrigérant qui la traverse (phase de stockage de frigories illustrée sur la figure 3) et  when this frigory storage unit 22 receives frigories of the refrigerant which passes through it (phase of storage of frigories illustrated in FIG. 3) and
- lorsque cette unité de stockage de frigories 22 restitue des frigories au réfrigérant qui la traverse (phase de restitution de frigories illustrée sur la figure 4).  when this refrigeration storage unit 22 renders frigories to the refrigerant which passes through it (phase of return of frigories illustrated in FIG. 4).
Dans ce système, la dérivation du circuit est réalisée par la vanne 36, la détente dans l'unité de stockage de frigories 22 par la vanne 35 et l'isolation de l'unité de stockage de frigories 22 par la vanne 35 et la vanne anti-retour 37. In this system, the bypass of the circuit is carried out by the valve 36, the expansion in the frigory storage unit 22 by the valve 35 and the insulation of the frigory storage unit 22 by the valve 35 and the valve anti-return 37.
La première vanne de dérivation 25 est une vanne 3 voies disposée à une jonction entre le dispositif thermique secondaire 21 et le circuit thermique principal 20. The first bypass valve 25 is a 3-way valve arranged at a junction between the secondary thermal device 21 and the main thermal circuit 20.
Dans la phase de la figure 2, la vanne 25 empêche la circulation vers le dispositif thermique secondaire 21 qui n'est pas utilisé. In the phase of Figure 2, the valve 25 prevents the flow to the secondary thermal device 21 which is not used.
Dans la phase de la figure 3, la vanne 25 permet une circulation de l'unité de stockage de frigories 22 vers le compresseur 2. In the phase of FIG. 3, the valve 25 allows circulation of the frigory storage unit 22 to the compressor 2.
Dans la phase de la figure 3, la vanne 25 permet une circulation de l'évaporateur 10 vers l'unité de stockage de frigories 22. Le dispositif thermique secondaire 21 comporte une deuxième vanne de dérivation 27, qui est une vanne deux voies, agencée pour être traversée sélectivement par du réfrigérant qui circule de l'évaporateur 10 du circuit thermique principal vers l'unité de stockage de frigories 22 pour permettre de transférer des frigories du réfrigérant vers l'unité de stockage de frigories par l'intermédiaire d'une détente dans cette vanne. In the phase of FIG. 3, the valve 25 allows the evaporator 10 to flow to the frigory storage unit 22. The secondary thermal device 21 comprises a second bypass valve 27, which is a two-way valve, arranged to be traversed selectively by refrigerant which flows from the evaporator 10 of the main thermal circuit to the frigory storage unit 22 to allow to transfer frigories of the refrigerant to the frigory storage unit via a trigger in this valve.
La vanne 27 est bloquante dans les phases de fonctionnement des figures 2 et 4, et passante dans la phase de fonctionnement de la figure 3. The valve 27 is blocking in the operating phases of Figures 2 and 4, and passing in the operating phase of Figure 3.
La deuxième vanne de dérivation 27 est agencée pour générer deux niveaux de pression respectivement pour l'évaporateur 10 et l'unité de stockage 22. The second bypass valve 27 is arranged to generate two pressure levels respectively for the evaporator 10 and the storage unit 22.
Cette deuxième vanne de dérivation peut être une vanne de section de passage variable, une vanne de section de passage unique ou une vanne 3 voies (35b). Le dispositif thermique secondaire 21 comporte une branche secondaire 28 sur laquelle est disposée cette deuxième vanne de dérivation 27, cette branche 28 faisant jonction fluidique 30 avec une branche primaire 29 sur laquelle sont disposées l'unité de stockage de frigories 22 et la pompe 23. Cette jonction 30 entre la branche primaire 28 et la branche secondaire 29 est disposée entre l'unité de stockage de frigories 22 et la pompe 23. This second bypass valve may be a variable flow section valve, a single passage section valve or a 3-way valve (35b). The secondary thermal device 21 comprises a secondary branch 28 on which this second bypass valve 27 is arranged, this branch 28 making a fluid junction 30 with a primary branch 29 on which the frigory storage unit 22 and the pump 23 are arranged. This junction 30 between the primary branch 28 and the secondary branch 29 is arranged between the frigory storage unit 22 and the pump 23.
Le dispositif thermique secondaire 21 comporte une vanne antiretour 31 disposée sur la branche primaire 29 en aval de la pompe 23. The secondary thermal device 21 comprises a non-return valve 31 disposed on the primary branch 29 downstream of the pump 23.
Bien entendu, l'invention n'est pas limitée à l'exemple qui vient d'être décrit. Par exemple, comme illustré sur la figure 5, le dispositif thermique secondaire 21 est agencé de sorte que le sens de circulation du réfrigérant dans l'unité de stockage de frigories 22 soit le même respectivement : Of course, the invention is not limited to the example just described. For example, as illustrated in FIG. 5, the secondary thermal device 21 is arranged such that the direction of circulation of the refrigerant in the frigory storage unit 22 is the same, respectively:
- lorsque cette unité de stockage 22 de frigories reçoit des frigories du réfrigérant qui la traverse et  when this storage unit 22 of frigories receives frigories of the refrigerant which passes through it and
- lorsque cette unité de stockage de frigories 22 restitue des frigories au réfrigérant qui la traverse.  - When this frigory storage unit 22 restores frigories to the refrigerant that passes through it.
Deux vannes de dérivation 35 et 36 sont prévues comme expliqué ci-dessous. Two bypass valves 35 and 36 are provided as explained below.
L'une des vannes de dérivation et de détente 35 est disposée à l'entrée de l'unité de stockage de frigories 22, sur une branche primaire 29. One of the bypass and expansion valves 35 is arranged at the inlet of the cold storage unit 22, on a primary branch 29.
L'autre des vannes de dérivation 36 est disposée entre l'évaporateur 10 et la pompe 23, sur une branche secondaire 28. Selon un aspect de l'invention, les vannes 35 et 36 peuvent être remplacées par une vanne 3 voies 35b (voir Figure 5a). The other of the bypass valves 36 is disposed between the evaporator 10 and the pump 23, on a secondary branch 28. According to one aspect of the invention, the valves 35 and 36 can be replaced by a 3-way valve 35b (see Figure 5a).
Une vanne anti-retour 37 est disposée à la sortie de l'unité de stockage de frigories 22. A check valve 37 is disposed at the outlet of the frigory storage unit 22.
Dans les exemples ci-dessus, l'unité de stockage de frigories 22 est agencée pour être à une pression inférieure à celle de l'évaporateur. In the above examples, the cold storage unit 22 is arranged to be at a lower pressure than that of the evaporator.
Un dispositif d'expansion 39, soit thermostatique soit électrique, est disposé en amont de l'évaporateur 10 pour générer une détente du réfrigérant avant que celui-ci ne traverse l'évaporateur 10. An expansion device 39, either thermostatic or electrical, is arranged upstream of the evaporator 10 to generate an expansion of the refrigerant before it passes through the evaporator 10.
L'unité de stockage de frigories 22 est agencée à l'intérieur d'un HVAC ou à l'extérieur d'un HVAC. The frigory storage unit 22 is arranged inside an HVAC or outside an HVAC.
Selon une variante illustrée aux figures 6 et 7, le système comporte une voie d'air 40 disposée parallèle à l'évaporateur 10, voie à travers laquelle peut circuler de l'air contournant l'évaporateur 10, et cet air pouvant, en sortie de cette voie, se mélanger à l'air issu de l'évaporateur. Ainsi la position de la vanne 27 en aval de l'évaporateur peut aider à ajuster la température de l'air à la sortie de l'évaporateur en mélangeant l'air froid issu de l'évaporateur et l'air plus chaud issu de la voir d'air précitée. Ceci est avantageux lors de la phase de stockage de frigories. La vanne peut être par exemple une vanne de fermeture simple avec un diamètre fixe. La vanne 2 voies référencée 27 est par exemple agencée pour générer une chute de pression fixe de manière à protéger l'évaporateur de la formation de glace. Le réfrigérant peut être un matériau, ici un fluide, à changement de phase pour travailler en chaleur latente afin de diminuer la masse nécessaire et limiter les variations de température du stockage. According to a variant illustrated in FIGS. 6 and 7, the system comprises an air channel 40 arranged parallel to the evaporator 10, a channel through which air can circulate bypassing the evaporator 10, and this air may, at the outlet of this path, mix with the air from the evaporator. Thus, the position of the valve 27 downstream of the evaporator can help to adjust the temperature of the air at the outlet of the evaporator by mixing the cold air coming from the evaporator and the warmer air coming from the evaporator. see above air. This is advantageous during the frigory storage phase. The valve may be for example a simple closing valve with a fixed diameter. The 2-way valve referenced 27 is for example arranged to generate a fixed pressure drop so as to protect the evaporator from ice formation. The refrigerant may be a material, in this case a fluid, with a phase change for working in latent heat in order to reduce the necessary mass and to limit the temperature variations of the storage.
Par exemple, le réfrigérant est un fluide diphasique type R134a ou 1234yf . L'unité de stockage de frigories peut contenir un matériau à changement de phase pour limiter les variations de température. For example, the refrigerant is a two-phase fluid type R134a or 1234yf. The frigory storage unit may contain a phase change material to limit temperature variations.
Dans les exemples ci-dessus, les vannes 27 ou 35 assurent une détente intermédiaire de façon à ce que la pression du compresseur et celle de l'unité de stockage soient différentes. La pression et la température du réfrigérant étant liées, alors pour continuer à souffler de l'air à la bonne température pour les passagers, il faut limiter la variation de pression. In the above examples, the valves 27 or 35 provide an intermediate expansion so that the pressure of the compressor and that of the storage unit are different. The pressure and temperature of the refrigerant being linked, so to continue to blow air at the right temperature for the passengers, it is necessary to limit the variation of pressure.
Or pour stocker, il faut baisser la température donc la pression. But to store, it is necessary to lower the temperature thus the pressure.
Une détente intermédiaire par les vannes citées ci-avant permet d'avoir deux niveaux de pression alors deux niveaux de température. Intermediate expansion by the valves mentioned above makes it possible to have two pressure levels then two temperature levels.
Selon un aspect de l'invention, le conduit menant le débit de réfrigérant de l'unité de stockage de frigories 22 à la pompe 23 peut être situé en aval ou en amont de la vanne anti-retour ou Check valve 37 permettant ainsi à la pompe réfrigérant d'être disposée directement à la sortie de l'unité de stockage de frigories. According to one aspect of the invention, the conduit leading the refrigerant flow of the cold storage unit 22 to the pump 23 may be located downstream or upstream of the check valve or check valve 37 thus allowing the refrigerant pump to be disposed directly at the outlet of the frigory storage unit.
La différence entre le mode de la figure 5b et celui de la figure 5c est que, dans le mode de la figure 5c, la vanne 3 voies de la figure 5b est remplacée par deux vannes 2 voies (voir encadré sur la figure 5c). The difference between the mode of FIG. 5b and that of FIG. 5c is that, in the mode of FIG. 5c, the 3-way valve of FIG. 5b is replaced by two 2-way valves (see box in FIG. 5c).
Afin de regrouper les composants pour un montage aisé sur une boucle de climatisation existante d'un véhicule, l'invention propose un dispositif fluidique 50 qui est facilement manipulable. In order to group the components for easy mounting on an existing air conditioning loop of a vehicle, the invention provides a fluidic device 50 which is easily manipulated.
Dans l'exemple de la figure 8, le dispositif fluidique 50 regroupe certains composants du système décrit à la figure 5a et comporte : In the example of FIG. 8, the fluidic device 50 groups together certain components of the system described in FIG. 5a and comprises:
- l'unité de stockage de frigories 22, the frigory storage unit 22,
- la pompe 23,  the pump 23,
- les deux vannes 37 ou clapets anti-retour,  the two valves 37 or non-return valves,
- la vanne 3 voies 35b. L'unité de stockage de frigories 22 et le composant fluidique sont portés par un support commun 60 comme on peut le voir sur les figures 14 et 15.  - the 3-way valve 35b. The frigory storage unit 22 and the fluid component are carried by a common support 60 as can be seen in FIGS. 14 and 15.
Le dispositif fluidique 50 comporte trois brides d'interface 61 , 62 etThe fluidic device 50 has three interface flanges 61, 62 and
63. La bride 63 est agencée pour être reliée à une entrée de l'évaporateur 10 du système de climatisation. 63. The flange 63 is arranged to be connected to an inlet of the evaporator 10 of the air conditioning system.
La bride 62 est agencée pour être reliée à la sortie de l'évaporateurThe flange 62 is arranged to be connected to the outlet of the evaporator
10. 10.
La bride 61 est reliée à l'échangeur interne 5 du système de climatisation. The flange 61 is connected to the internal exchanger 5 of the air conditioning system.
La bride 63 agencée pour être reliée à l'entrée de l'évaporateur et celle 61 agencée pour être reliée à la sortie de l'évaporateur sont disposées sur une même face du dispositif fluidique, de préférence côte à côte, comme illustré sur la figure 15. The flange 63 arranged to be connected to the inlet of the evaporator and the one 61 arranged to be connected to the outlet of the evaporator are disposed on the same face of the fluidic device, preferably side by side, as illustrated in Figure 15.
En variante, comme illustré sur la figure 9, la bride 63 agencée pour être reliée à l'entrée de l'évaporateur et celle 61 agencée pour être reliée à la sortie de l'évaporateur sont disposées sur deux faces différentes du dispositif fluidique 50, notamment deux faces 65 et 66 sensiblement perpendiculaires l'une à l'autre. Alternatively, as illustrated in FIG. 9, the flange 63 arranged to be connected to the inlet of the evaporator and the flange 61 arranged to be connected to the outlet of the evaporator are arranged on two different faces of the fluidic device 50, in particular two faces 65 and 66 substantially perpendicular to each other.
La bride 62 reliée à l'échangeur interne du système de climatisation est disposée sur une face différente de la face associée aux deux autres brides 61 et 63. The flange 62 connected to the internal exchanger of the air conditioning system is disposed on a different face of the face associated with the other two flanges 61 and 63.
La bride 63 agencée pour être reliée à l'entrée de l'évaporateur est disposée du côté de l'unité de stockage de frigories 22, comme dans l'exemple de la figure 9. The flange 63 arranged to be connected to the inlet of the evaporator is disposed on the side of the frigory storage unit 22, as in the example of FIG. 9.
En variante, la bride 63 agencée pour être reliée à l'entrée de l'évaporateur est disposée du côté opposé à l'unité de stockage de frigories, comme dans l'exemple de la figure 10. Alternatively, the flange 63 arranged to be connected to the inlet of the evaporator is disposed on the opposite side to the frigory storage unit, as in the example of Figure 10.
Le support commun 60 comporte au moins une platine, formée de préférence par une pièce usinée, notamment en aluminium ou PPS. The common support 60 comprises at least one plate, preferably formed by a machined part, in particular aluminum or PPS.
Toutes les brides 61 , 62 et 63 sont réalisées d'un seul tenant avec le reste du support 60. All the flanges 61, 62 and 63 are made in one piece with the rest of the support 60.
Le support commun 60 comporte des logements agencés chacun pour recevoir au moins partiellement la vanne 35b, la pompe 23, les clapets 37 et l'unité de stockage de frigories 22, comme on peut le voir sur les figures 14 et 15. Le dispositif comporte un capot 69 agencé pour se fixer sur le support commun et pour recouvrir au moins partiellement le support 60. Les figures 1 1 à 13 illustrent respectivement les modes de réalisation des figures 8 à 10, avec la vanne 3 voies remplacée par deux vannes 2 voies 27. The common support 60 comprises housings each arranged to at least partially receive the valve 35b, the pump 23, the valves 37 and the frigory storage unit 22, as can be seen in FIGS. 14 and 15. The device comprises a cover 69 arranged to attach to the common support and to at least partially cover the support 60. FIGS. 11 to 13 respectively illustrate the embodiments of FIGS. 8 to 10, with the 3-way valve replaced by two 2-way valves 27.
Dans une variante illustrée à la figure 16, le dispositif fluidique comporte quatre brides d'interface 101 à 104 et une unité de détente électronique 105 encore parfois appelé sous le sigle EXV. In a variant illustrated in Figure 16, the fluidic device comprises four interface flanges 101 to 104 and an electronic expansion unit 105 still sometimes called under the symbol EXV.
La bride 101 est agencée pour être disposée entre l'unité de détente 105 et l'échangeur interne du circuit principal. The flange 101 is arranged to be disposed between the expansion unit 105 and the internal exchanger of the main circuit.
La bride 102 est agencée pour être disposée entre l'unité de détente 105 et un évaporateur 10 du circuit principal. The flange 102 is arranged to be disposed between the expansion unit 105 and an evaporator 10 of the main circuit.
La bride 103 est agencée pour être disposée entre l'unité de stockage de frigories 22 et l'évaporateur 10 du circuit principal. The flange 103 is arranged to be disposed between the cold storage unit 22 and the evaporator 10 of the main circuit.
La bride 104 est agencée pour être disposée entre l'unité de stockage de frigories 22 et l'échangeur interne 5. Dans l'exemple de la figure 16, l'unité de détente 105 est du même côté que la vanne 3 voies 35b. The flange 104 is arranged to be arranged between the frigory storage unit 22 and the internal exchanger 5. In the example of Figure 16, the expansion unit 105 is on the same side as the 3-way valve 35b.
De manière alternative, comme illustré sur la figure 17, l'unité dé détente 105 est du côté de l'unité de stockage de frigories 22, et non du côté de la vanne 3 voies. Les figures 18 et 19 représentent des alternatives respectivement aux figures 16 et 17 avec la vannes 3 voies remplacées par deux vannes 2 voies. Alternatively, as shown in Fig. 17, the detent unit 105 is on the side of the frigory storage unit 22, and not on the side of the 3-way valve. Figures 18 and 19 show alternatives respectively to Figures 16 and 17 with the 3-way valves replaced by two 2-way valves.
Comme on peut le voir sur les figures 20 et 21 , les composants 101 - 105, l'unité 22, la pompe 23 et la vanne 35b sont portés par le support commun 60. As can be seen in FIGS. 20 and 21, the components 101 - 105, the unit 22, the pump 23 and the valve 35b are carried by the common support 60.
Dans une variante illustrée à la figure 22, le dispositif fluidique 50 comporte un échangeur thermique interne 5, encore parfois appelé sous le sigle IHX. L'échangeur interne 5 est agencé pour communiquer avec une bride d'interface 104 connectée à un condenseur du circuit principal et une bride d'interface 101 connectée à un compresseur de ce circuit principal. In a variant illustrated in FIG. 22, the fluidic device 50 comprises an internal heat exchanger 5, sometimes sometimes referred to as IHX. The internal heat exchanger 5 is arranged to communicate with an interface flange 104 connected to a condenser of the main circuit and an interface flange 101 connected to a compressor of this main circuit.
Selon un aspect de l'invention, l'unité de détente électronique 105 est disposé du côté du ou des vannes du dispositif fluidique, comme illustré sur la figure 22. According to one aspect of the invention, the electronic expansion unit 105 is disposed on the side of the valve (s) of the fluidic device, as illustrated in FIG.
En variante comme illustré sur la figure 23, l'unité de détente électronique 105 est disposée du côté de l'unité de stockage de frigories 22. La vanne 3 voies est en communication fluidique avec la bride 103, entre cette interface et l'unité de stockage de frigories. Alternatively, as illustrated in FIG. 23, the electronic expansion unit 105 is disposed on the side of the cold storage unit 22. The 3-way valve is in fluid communication with the flange 103, between this interface and the unit. cold storage.

Claims

REVENDICATIONS
1 . Dispositif fluidique (50) agencé pour être monté dans un système (1 ) thermique de véhicule automobile, notamment un système de climatisation, ce dispositif fluidique comportant : 1. Fluidic device (50) arranged to be mounted in a motor vehicle thermal system (1), in particular an air conditioning system, this fluidic device comprising:
- une unité de stockage de frigories (22),  a unit for storing frigories (22),
- au moins un composant fluidique autre que l'unité de stockage de frigories (22), ce composant se raccordant fluidiquement à l'unité de stockage de manière à permettre une circulation de fluide caloporteur (ou fluide réfrigérant) entre l'unité de stockage de frigories et le composant,  at least one fluidic component other than the cold storage unit (22), this component being fluidly connected to the storage unit so as to allow circulation of coolant (or refrigerant) between the storage unit of frigories and the component,
l'unité de stockage de frigories (22) et le composant fluidique étant portés par un support commun (60). the cold storage unit (22) and the fluid component being carried by a common support (60).
2. Dispositif selon la revendication précédente, le composant fluidique étant choisi parmi : une pompe, une vanne multivoies, une bride d'interface. 2. Device according to the preceding claim, the fluidic component being selected from: a pump, a multiport valve, an interface flange.
3. Dispositif selon la revendication précédente, comportant outre l'unité de stockage de frigories, au moins plusieurs composants fluidiques qui sont une pompe, au moins une vanne multivoies (35b) et au moins une bride d'interface. 3. Device according to the preceding claim, comprising in addition to the cold storage unit, at least several fluidic components which are a pump, at least one multichannel valve (35b) and at least one interface flange.
4. Dispositif selon la revendication précédente, le dispositif comportant exactement trois brides d'interface (61 , 62, 63), l'une étant agencée pour être reliée une entrée d'un évaporateur du système de climatisation, l'une des autres brides étant agencée pour être reliée à la sortie de l'évaporateur et la dernière des brides étant reliée à un échangeur interne du système de climatisation. 4. Device according to the preceding claim, the device having exactly three interface flanges (61, 62, 63), one being arranged to be connected to an inlet of an evaporator of the air conditioning system, one of the other flanges. being arranged to be connected to the outlet of the evaporator and the last of the flanges being connected to an internal exchanger of the air conditioning system.
5. Dispositif selon l'une des revendications précédentes, le support commun (60) comportant au moins une platine, formée de préférence par une pièce usinée, notamment en aluminium ou PS. 5. Device according to one of the preceding claims, the common carrier (60) having at least one plate, preferably formed by a machined part, in particular aluminum or PS.
6. Dispositif selon l'une des revendications précédentes, le support commun (60) comporte au moins un logement agencé pour recevoir au moins partiellement une vanne de dérivation, ou une pompe pour fluide frigorigène. 6. Device according to one of the preceding claims, the common carrier (60) comprises at least one housing arranged to receive at least partially a bypass valve, or a refrigerant pump.
7. Dispositif selon l'une des revendications précédentes, le support commun (60) comporte au moins un canal formant un circuit fluidique en communication fluidique au moins avec l'une des brides d'interface. 7. Device according to one of the preceding claims, the common carrier (60) comprises at least one channel forming a fluidic circuit in fluid communication at least with one of the interface flanges.
8. Dispositif selon l'une des revendications précédentes, le dispositif fluidique comporte quatre brides d'interface (101 -104) et une unité de détente électronique (105). 8. Device according to one of the preceding claims, the fluidic device comprises four interface flanges (101 -104) and an electronic expansion unit (105).
9. Dispositif selon l'une des revendications précédentes, le dispositif fluidique comportant un échangeur thermique interne (5). 9. Device according to one of the preceding claims, the fluidic device comprising an internal heat exchanger (5).
10. Dispositif selon la revendication précédente, l'échangeur interne étant agencé pour communiquer avec une bride d'interface connectée à un condenseur du circuit principal et une bride d'interface connectée à un compresseur de ce circuit principal. 10. Device according to the preceding claim, the internal exchanger being arranged to communicate with an interface flange connected to a condenser of the main circuit and an interface flange connected to a compressor of this main circuit.
PCT/FR2018/052050 2017-09-11 2018-08-09 Thermal system, in particular a motor vehicle air conditioning system WO2019048751A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1758336A FR3070903B1 (en) 2017-09-11 2017-09-11 THERMAL SYSTEM, ESPECIALLY A MOTOR VEHICLE AIR CONDITIONING SYSTEM
FR1758336 2017-09-11

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WO2019048751A1 true WO2019048751A1 (en) 2019-03-14

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Citations (10)

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Publication number Priority date Publication date Assignee Title
JP2000313226A (en) 1999-05-06 2000-11-14 Nissan Motor Co Ltd Air conditioner for automobile
US20030159455A1 (en) 2002-02-28 2003-08-28 Yasukazu Aikawa Vehicle air conditioner with cold storage unit
US20060288727A1 (en) * 2005-06-24 2006-12-28 Denso Corporation Cold storage tank unit and refrigeration cycle apparatus using the same
US7228705B2 (en) 2002-12-16 2007-06-12 Daimlerchrysler Ag Air-conditioning installation, especially for motor vehicles
JP2009229014A (en) 2008-03-24 2009-10-08 Denso Corp Refrigeration cycle device with cold accumulator
US20100018231A1 (en) 2004-11-30 2010-01-28 Valeo Climatisation Heat Exchanger With Heat Storage
EP2335953A1 (en) * 2009-12-17 2011-06-22 Valeo Systèmes Thermiques Air conditioning system comprising a support carrying constituting elements of the system
FR2965342A1 (en) * 2010-09-28 2012-03-30 Valeo Systemes Thermiques THERMAL BATTERY, HEATING MODULE USING SUCH A BATTERY AND HEATING DEVICE USING SUCH A BATTERY AND / OR SUCH A MODULE
FR2983284A1 (en) * 2011-11-30 2013-05-31 Valeo Systemes Thermiques CIRCUIT COMPRISING AN INTERNAL EXCHANGER HAVING A BRANCH FITTED BY A REFRIGERANT FLUID ACCORDING TO TWO OPPOSITE Senses
WO2014012873A1 (en) 2012-07-18 2014-01-23 Valeo Klimasysteme Gmbh Vehicle air conditioning unit

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000313226A (en) 1999-05-06 2000-11-14 Nissan Motor Co Ltd Air conditioner for automobile
US20030159455A1 (en) 2002-02-28 2003-08-28 Yasukazu Aikawa Vehicle air conditioner with cold storage unit
US7228705B2 (en) 2002-12-16 2007-06-12 Daimlerchrysler Ag Air-conditioning installation, especially for motor vehicles
US20100018231A1 (en) 2004-11-30 2010-01-28 Valeo Climatisation Heat Exchanger With Heat Storage
US20060288727A1 (en) * 2005-06-24 2006-12-28 Denso Corporation Cold storage tank unit and refrigeration cycle apparatus using the same
JP2009229014A (en) 2008-03-24 2009-10-08 Denso Corp Refrigeration cycle device with cold accumulator
EP2335953A1 (en) * 2009-12-17 2011-06-22 Valeo Systèmes Thermiques Air conditioning system comprising a support carrying constituting elements of the system
FR2965342A1 (en) * 2010-09-28 2012-03-30 Valeo Systemes Thermiques THERMAL BATTERY, HEATING MODULE USING SUCH A BATTERY AND HEATING DEVICE USING SUCH A BATTERY AND / OR SUCH A MODULE
FR2983284A1 (en) * 2011-11-30 2013-05-31 Valeo Systemes Thermiques CIRCUIT COMPRISING AN INTERNAL EXCHANGER HAVING A BRANCH FITTED BY A REFRIGERANT FLUID ACCORDING TO TWO OPPOSITE Senses
WO2014012873A1 (en) 2012-07-18 2014-01-23 Valeo Klimasysteme Gmbh Vehicle air conditioning unit

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FR3070903B1 (en) 2021-01-08

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