EP4077001A1 - Circuit de fluide réfrigérant pour véhicule adapté a une charge rapide d'un dispositif de stockage - Google Patents
Circuit de fluide réfrigérant pour véhicule adapté a une charge rapide d'un dispositif de stockageInfo
- Publication number
- EP4077001A1 EP4077001A1 EP20828546.0A EP20828546A EP4077001A1 EP 4077001 A1 EP4077001 A1 EP 4077001A1 EP 20828546 A EP20828546 A EP 20828546A EP 4077001 A1 EP4077001 A1 EP 4077001A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- heat exchanger
- compression device
- branch
- distance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002826 coolant Substances 0.000 title abstract description 4
- 230000006835 compression Effects 0.000 claims abstract description 113
- 238000007906 compression Methods 0.000 claims abstract description 113
- 239000003507 refrigerant Substances 0.000 claims description 91
- 239000012530 fluid Substances 0.000 claims description 82
- 238000000034 method Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 9
- 238000009825 accumulation Methods 0.000 description 6
- 239000012071 phase Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000013529 heat transfer fluid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- -1 heat exchangers Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
-
- 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
- B60H1/3205—Control means therefor
-
- 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
- B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
- B60H1/32281—Cooling devices using compression characterised by refrigerant circuit configurations comprising a single secondary circuit, e.g. at evaporator or condenser side
-
- 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
- B60H1/323—Cooling devices using compression characterised by comprising auxiliary or multiple systems, e.g. plurality of evaporators, or by involving auxiliary cooling devices
-
- 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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
-
- 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
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/00307—Component temperature regulation using a liquid flow
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/06—Several compression cycles arranged in parallel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the field of the present invention is that of refrigerant fluid circuits for vehicles, in particular for motor vehicles. It relates to a refrigerant circuit equipping a motor vehicle which is provided with an electrical storage device and a method for controlling a temperature of the electrical storage device implementing such a circuit.
- Motor vehicles are commonly equipped with a refrigerant circuit used to heat or cool different areas or different components of the vehicle. It is in particular known to use this refrigerant circuit to heat treat a flow of air sent into the passenger compartment of the vehicle equipped with such a circuit.
- this circuit it is known to use G to cool an electrical storage device of the vehicle, the latter being used to supply energy to an electric motor capable of setting the vehicle in motion.
- the refrigerant circuit thus provides energy capable of cooling the electrical storage device during its use in the driving phases.
- the refrigerant circuit is thus sized to cool this electrical storage device for temperatures which remain moderate.
- a new charging technique has recently appeared. It consists in charging the electrical storage device at a high voltage and amperage, so as to charge the electrical storage device in a maximum time of a few tens of minutes. This rapid charge involves heating of the electrical storage device which should be treated. Furthermore, it is necessary to consider the possibility that the occupants of the vehicle remain inside the vehicle all or part of the charging time mentioned above. The passenger compartment must then also be heat treated during this charge. fast to maintain acceptable comfort conditions for the occupants, in particular when the temperature outside the vehicle exceeds 30 ° C.
- Document FR3075705 describes a circuit designed to achieve these objectives.
- This circuit includes a main branch which is provided with a main heat exchanger and which extends between a point of convergence and a point of divergence.
- This circuit also includes a first branch and a second branch which run in parallel with each other between the point of divergence and the point of convergence. The first branch and the second branch are both arranged in series with the main branch.
- the circuit includes a high pressure line which extends between the two compression devices and the two expansion members.
- the high pressure line comprises a first part which extends between an outlet of the first compression device and a point of convergence of the first branch and of the second branch, a second part which extends between an outlet of the second compression device and the point of convergence, and a common portion which extends the point of convergence and a point of entry of refrigerant fluid inside the main heat exchanger.
- the first part, the second part and the common part jointly form an assembly which is interposed between the outlets of the two compression devices and the entry point of refrigerant fluid inside the main heat exchanger.
- the present invention provides a refrigerant fluid circuit fitted to a vehicle which is configured to simultaneously heat treat an electrical storage device of a vehicle and heat treat a vehicle interior, the circuit comprising at least two compression devices, the circuit comprising a high pressure line which is arranged so that any pressure drops affecting it are minimized and so that the refrigerant pressure inside the circuit remains below a threshold pressure, in n ' any mode of operation of the circuit, including when the two compression devices that the circuit comprises are operating simultaneously.
- a circuit of the present invention is a circuit for a motor vehicle configured to be traversed by a refrigerant fluid.
- the circuit comprises at least one main branch comprising at least one main heat exchanger comprising at least one refrigerant fluid inlet.
- the circuit also includes a first branch and a second branch which extend between a point of divergence and a point of convergence and which are both arranged in series with the main branch.
- the first branch comprises at least a first compression device, a first expansion member and a first heat exchanger configured to heat treat an electrical storage device of the vehicle.
- the second branch comprises at least a second compression device, a second expansion member and a second heat exchanger configured to heat treat a vehicle interior.
- the circuit comprises a high pressure line which comprises a first portion extending between an outlet of the first compression device and the inlet of the main heat exchanger and which comprises a second portion extending between an outlet of the second pressure device. compression and the main heat exchanger inlet.
- the first portion is a first length and the second portion is a second length.
- a first distance separates the outlet of the first compression device from the point of convergence and a second distance separates the outlet of the second compression device from the point of convergence.
- the first distance is greater than half of the first length and the second distance is greater than half of the second length.
- the circuit advantageously comprises at least any one of the characteristics following techniques, taken alone or in combination:
- the present invention therefore proposes to make this common part as small as possible, or even to make it non-existent in one of these embodiments,
- the point of divergence is the zone of the circuit where the main branch splits into two, forming the first branch and the second branch,
- the point of convergence is, for example, the zone of the circuit where the first branch and the second branch meet, to form the main branch.
- the point of convergence is for example again the zone of the circuit where the refrigerant fluid coming from the first compression device and the refrigerant fluid coming from the second compression device mix,
- the second compression device is independent of the first compression device in that one of the compression devices can be active while the other compression device is inactive, or simultaneously rotate at different rotational speeds,
- the refrigerant fluid is for example a subcritical fluid, such as that known under the reference R134A or R1234YF.
- the refrigerant fluid can be super critical, such as carbon dioxide whose reference is R744.
- the refrigerant circuit according to the invention is a closed circuit which implements a thermodynamic cycle, the first compression device and the second compression device are for example compressors, and the invention finds a very particular application when the first compression device and the second compression device are electric compressors with fixed displacement and variable speed . It is thus possible to control the thermal power of the circuit according to the invention,
- the first branch is arranged in parallel with the second branch, seen from the refrigerant fluid
- the main heat exchanger can be installed on the front of the vehicle.
- This main heat exchanger can thus be used as a condenser, or gas cooler in the case of a super-critical fluid, or as an evaporator when the circuit operates as a heat pump,
- the first heat exchanger is configured to heat treat an electrical storage device of the vehicle.
- the first heat exchanger exchanges calories between the refrigerant fluid and the vehicle's electrical storage device, either directly, that is to say by convection between the first heat exchanger and the electrical storage device, or indirectly via a fluid loop coolant, the latter being intended to transport the calories from the electrical storage device to the first heat exchanger.
- the cooling of the electrical storage device can be indirect.
- the first heat exchanger can be in contact with the electrical storage device. In such a case, the cooling of the electrical storage device is direct.
- the circuit according to the invention may include a refrigerant storage device arranged in the portion of the second branch located between the second heat exchanger and the second compression device,
- the first distance is greater than three-quarters of the first length and the second distance is greater than three-quarters of the second length
- the first distance is greater than 90% of the first length and in that the second distance is greater than 90% of the second length
- the first portion and the second portion comprise a common portion which extends between the point of convergence and a single refrigerant fluid inlet inside the main heat exchanger, - the first portion comprises a first part which extends between the outlet of the first compression device and the point of convergence, and the second portion comprises a second part which extends between the second outlet of the second compression device and the point convergence,
- the circuit comprises a circuit element arranged in a "Y", the foot of which consists of the common part and the arms consist of the first part and the second part,
- the circuit element connects the first compression device and the second compression device to the main heat exchanger
- the first part has a first passage section
- the second part has a second passage section
- the common part has a third passage section, the third passage section being greater than or equal to the sum of the first passage section and of the second passage section
- the first passage section, the second passage section and the third passage section correspond to a surface offered respectively by the first part, the second part and the part common to the refrigerant fluid to flow, these surfaces being taken orthogonally to the flow of refrigerant fluid within these parts.
- the first length is equal to the first distance and in that the second length is equal to the second distance
- the main heat exchanger comprises a first inlet in fluid communication with the first portion and a second inlet in fluid communication with the second portion,
- the point of convergence includes the first entry and the second entry
- the point of convergence is housed inside the main heat exchanger and more particularly downstream of the first inlet and of the second inlet in a direction of flow of the refrigerant fluid inside the heat exchanger.
- At least one pipe connects a portion of the first branch located between the first heat exchanger and the first compression device to a portion of the second branch located between the second heat exchanger and the second compression device
- the pipe comprises at least one means of controlling the circulation of the refrigerant fluid within the pipe
- the means for controlling the circulation of the refrigerant fluid within the pipe comprises at least one device for expanding the refrigerant fluid
- the means for controlling the circulation of the refrigerant fluid within the pipe comprises a first non-return valve
- the circuit comprises a first pipe arranged in parallel with the pipe,
- the first pipe includes a second non-return valve.
- the present invention also relates to a method for controlling the temperature of an electrical storage device of a motor vehicle, implementing such a refrigerant circuit, a method during which the first compression device is simultaneously activated and the second compression device during a rapid charge of the electrical storage device.
- Figure 1 is a schematic view of the circuit according to the invention, in a first embodiment
- Figure 2 is a schematic view of the circuit according to the invention, in a second embodiment
- FIG. 3 is a detailed schematic view of the circuit illustrated in FIG. 1,
- FIG. 4 is a detailed schematic view of the circuit illustrated in FIG. 2.
- the circuit according to the invention mainly comprises two devices for compressing the refrigerant fluid, heat exchangers, components. detents, pipes connecting each of these components, and optionally valves or check valve.
- the circuit can also be placed under the control of a controller which acts on some of these components.
- the upstream and downstream terms used in the following description refer to the direction of circulation of the fluid considered, that is to say the refrigerant fluid, an interior air flow sent to a vehicle passenger compartment or an air flow. exterior to a vehicle interior.
- the refrigerant fluid FR is symbolized by an arrow which illustrates the direction of circulation of the latter in the pipe considered.
- the solid lines illustrate a portion of the circuit where the refrigerant fluid circulates, while the dotted lines show an absence of circulation of the refrigerant fluid.
- FIGS 1 and 2 thus show a circuit 1 inside which a refrigerant FR circulates.
- This circuit 1 is a closed loop where the refrigerant fluid FR is circulated by a first compression device 9 and / or by a second compression device 13.
- these compression devices 9, 13 can take the form of an electric compressor, that is to say a compressor which includes a compression mechanism, an electric motor and possibly a controller.
- the rotation mechanism is set in rotation by the electric motor whose speed of rotation is placed under the control of the controller, the latter possibly being external or internal to the compression device concerned.
- Circuit 1 comprises a main branch 2, a first branch 4 and a second branch 5 which are in series with the main branch 2, so as to form a closed circuit where a thermodynamic cycle takes place.
- the first branch 4 and the second branch 5 separate at a point of divergence 6 and meet at a point of convergence 7. Between these two points, the first branch 4 and the second branch 5 are in parallel, seen from the refrigerant fluid FR .
- the main branch 2 comprises a main heat exchanger 3.
- the latter is intended to be traversed by the refrigerant fluid FR and by an external air flow Fl.
- This main heat exchanger 3 is the seat of an exchange of calories between the refrigerant fluid FR and this flow of external air Fl and it can in particular be used as a condenser.
- This main heat exchanger 3 can be installed on the front face of the vehicle equipped with the circuit 1 according to the invention and in this situation it is crossed by the flow of air Fl outside the vehicle interior.
- the first branch 4 begins at the point of divergence 6 and ends at the point of convergence 7, and comprises successively and according to the direction of circulation of the refrigerant fluid FR in the first branch 4 a first expansion member 8, a first heat exchanger 10 and the first compression device 9 of the refrigerant fluid FR.
- the first heat exchanger 10 is thus interposed between an outlet of the first expansion member 29 and an inlet of the first compression device 30.
- This first heat exchanger 10 is specifically dedicated to the heat treatment of an electrical storage device 11, the function of which is to supply electrical energy to one or more electric motors which set the vehicle in motion.
- an electric storage device 11 accumulates or restores this electric energy with a view to setting the motor vehicle in motion, via the dedicated electric motor.
- This is, for example, a battery pack comprising several electric cells that store electric current.
- the first heat exchanger 10 directly exchanges calories with the electrical storage device 11, by convection or by conduction. We are talking here about direct heat treatment of the electrical storage device 11.
- the first heat exchanger 10 is thermally associated with the electrical storage device 11 via a heat transfer fluid loop. This is then referred to as indirect heat treatment of the electrical storage device 11.
- the heat transfer fluid thus captures the calories at the level of the electrical storage device 11 and transports them to the first heat exchanger 10.
- the first expansion member 8 acts on a thermal power implemented by the first heat exchanger 10, being able to vary this thermal power from the maximum power of the first heat exchanger 10 to any thermal power below this maximum power. , in particular by reducing the section of passage of the refrigerant fluid in the first expansion member 8.
- the first expansion member 8 is indifferently a thermostatic expansion valve, an electronic expansion valve, a tube orifice or the like.
- the inlet of the first compression device 30 is connected to an outlet of the first heat exchanger 32.
- An outlet of the first compression device 31 is in turn connected to the point of convergence 7.
- the first branch 4 of the circuit 1 also comprises a portion of the first branch 33 which extends between the first heat exchanger 10, more particularly the outlet of the first heat exchanger 32, and the first compression device 9, in particular the inlet of the first. compression device 30.
- the second branch 5 begins at the point of divergence 6 and ends at the point of convergence 7, and comprises successively and according to the direction of circulation of the refrigerant fluid FR in the second branch 5 a second expansion member 12, a second heat exchanger 14, a refrigerant fluid accumulation device 36 and the second refrigerant fluid compression device 13 FR.
- the second heat exchanger 14 and the storage device 36 are thus interposed between an outlet of the second expansion member 34 and an inlet of the second compression device 35, the second heat exchanger 14 being disposed upstream of the storage device 36, seen from the FR refrigerant.
- the accumulation device 36 can take the form of an accumulator, where the liquid phase contained in the refrigerant fluid FR accumulates in the accumulator, and where the gas phase of this same refrigerant fluid FR is sucked in by the second device. compression 13.
- the accumulation device 36 can be a desiccant bottle which can advantageously be integrated into the main heat exchanger 3.
- the second heat exchanger 14 is intended to heat treat an interior air flow F2 which is sent to the interior of the vehicle cabin.
- the second heat exchanger 14 can be installed inside a ventilation, heating and / or air conditioning installation 28 which cooperates with circuit 1, to form a heat treatment system for the motor vehicle.
- This second heat exchanger 14 can then be used as an evaporator to cool the internal air flow F2 which is sent into the vehicle cabin.
- the second expansion member 12 acts on a thermal power implemented by the second heat exchanger 14, being able to vary this thermal power to more or less cool the internal air flow F2 sent into the passenger compartment.
- the second expansion member 12 is indifferently a thermostatic expansion valve, an electronic expansion valve, a tube orifice or the like.
- the inlet of the second compression device 35 is connected to an outlet of the accumulation device 37.
- the second compression device 13 also comprises an outlet of the second compression device 38 which is connected to the point of convergence 7.
- the second branch 5 of the circuit 1 also comprises a portion of the second branch 39 which extends between the second heat exchanger 14, more particularly an outlet of the second heat exchanger 40, and the second compression device 13, in particular the inlet of the second. compression device 35.
- the accumulation device 36 can be placed in this portion of the second branch 39.
- Such a circuit 1 comprises a high pressure line 200 which extends between on the one hand the outlet of the first compression device 31 and the outlet of the second compression device 38 and on the other hand an inlet of the first expansion member 51 and an inlet of the second expansion member 52.
- the refrigerant fluid FR is subjected to a high pressure due to its compression inside the compression devices 9, 13.
- the high pressure line 200 comprises a first portion 201 which extends between the outlet of the first compression device 31 and an inlet of the main heat exchanger 100, 101, 102.
- the first portion 201 is of a first length XI measured between the outlet of the first compression device 31 and the inlet of the main heat exchanger 100, 101, 102.
- the high pressure line 200 comprises a second portion 202 which extends between the outlet of the second compression device 38 and the inlet of the main heat exchanger 100, 101, 102.
- the second portion 202 is d 'a second length X2 measured between the outlet of the second compression device 38 and the inlet of the main heat exchanger 100, 101, 102.
- a first distance Y1 separates the outlet of the first compression device 31 from the point of convergence 7 and a second distance Y2 separates the outlet of the second compression device 38 from the point of convergence 7.
- the present invention advantageously proposes that the first distance Y 1 is greater than half of the first length XI and in that the second distance Y2 is greater than half of the second length X2.
- the point of convergence 7 is closer to the inlet 100, 101, 102 of refrigerant fluid FR inside the main heat exchanger 3 than to the outlet of the first compression device 31 and / or of the output of the second device compression 38.
- Such proximity makes it possible to minimize the pressure losses which the refrigerant fluid FR undergoes between the compression devices 9, 13 and the main heat exchanger 3, and to maintain a pressure inside the first portion 201 and the second portion 202 below a threshold pressure, typically of the order of 27 bars.
- a threshold pressure typically of the order of 27 bars.
- at least one common part of the pipes between the first compression device 9 and the main heat exchanger 3 on the one hand, and between the second compression device 13 and the main heat exchanger 3 on the other hand is important, the less these pressure drops are important.
- the result is that the part common to the two portions 201, 202 has a length which is as small as possible.
- the present invention therefore proposes to make this common part as small as possible, or even to make it non-existent in one of these variant embodiments.
- the pressure losses are reduced.
- the risk of having to reduce the capacity of the refrigeration loop due to an excessively high value of the high pressure at the outlet of one of the two compressors is thus reduced.
- the cooling performance is
- the first distance Y1 is preferably greater than three-quarters of the first length XI and the second distance Y2 is preferably greater than three-quarters of the second length X2.
- the first distance Y 1 is greater than 90% of the first length XI and the second distance Y2 is greater than 90% of the second length X2.
- the first portion 201 and the second portion 202 comprise a common portion 300 which extends between the point of convergence 7 and a single inlet 100 of refrigerant fluid FR inside the main heat exchanger 3.
- a third distance Y3 separates the point of convergence 7 and the single inlet 100 of refrigerant fluid FR inside the main heat exchanger 3.
- the common part 300 is therefore of a length equivalent to this third distance Y3, which is non-zero according to this variant, but which is as small as possible to minimize the pressure losses.
- the present invention thus proposes that the common part 300 be as short as possible so that the pressure drops are minimized and so that the pressure prevailing inside the common part remains below the threshold pressure. .
- the first length XI is equal to the sum of the first distance Y1 and the third distance Y3. It is also noted that according to this variant, the second length X2 is equal to the sum of the second distance Y2 and of the third distance Y3.
- the first portion 201 comprises a first part 301 which extends between the outlet of the first compression device 31 and the point of convergence 7.
- the first part 301 is of a length corresponding to the first distance Yl.
- the second portion 202 comprises a second part 302 which extends between the second outlet of the second compression device 38 and the point of convergence 7.
- the second part 302 is of a length corresponding to the second distance Y2
- the circuit 1 comprises a circuit element 400 arranged in a "Y", the foot of which consists of the common part 300 and the arms consist of the first part 301 and of the second part 302.
- the circuit element 400 connects the first compression device 9 and the second compression device 13 to the main heat exchanger 3.
- the first part 301 having a first passage section S1, the second part 302 having a second passage section S2 and the common part 300 having a third passage section S3, the third passage section S3 is advantageously greater or equal to the sum of the first passage section SI and the second passage section S2, to reduce the pressure drops that the refrigerant fluid FR is liable to undergo inside the common part 300.
- the first passage section S1, the second passage section S2 and the third passage section S3 are defined as being a surface offered respectively by the first part 301, the second part 302 and the common part 300 to the refrigerant fluid FR to flow inside of these parts 300, 301, 302, these surfaces being taken orthogonally to the flow of refrigerant fluid FR inside these parts 300, 301, 302.
- the first length XI is equal to the first distance Y1 and the second length X2 is equal to the second distance Y2.
- the distance which separates the outlet of any one of the compression devices 9, 13 is equal to the distance which separates this outlet of the compression device 9, 13 from the inlet of the main heat exchanger 100, 101, 102.
- first portion 201 and the second portion 202 do not include any common part and are arranged in two parallel and independent lines, the first portion 201 connecting the outlet of the first compression device 31 to a first inlet 101 of the main heat exchanger 3, and the second portion 202 connecting the outlet of the second device compression 38 to a second inlet 102 of the main heat exchanger 3.
- the point of convergence 7 is located downstream of the first inlet 101 and of the second inlet 102, the point of convergence 7 being the point of the circuit 1 where the refrigerant fluid FR coming from the first compression device 9 and the refrigerant fluid FR from the second compression device 13 mix with each other. It is understood that according to this variant the point of convergence 7 is likely to be housed inside the main heat exchanger 3.
- the circuit 1 comprises at least one pipe 15 which fluidly connects the portion of the first branch 33 to the portion of the second branch 39.
- a pipe 15 makes it possible to put in communication the first branch 4 and the second branch 5, thus offering the possibility of mutualizing the use of the two compression devices 9, 13 when the vehicle is in a rapid charge situation and when the occupants of this vehicle also request cooling of the vehicle. air sent into the passenger compartment.
- the pipe 15 is thus connected to a first point 41 located in the portion of the first branch 33 and to a second point 42 located in the portion of the second branch 39.
- the circulation of the refrigerant fluid FR in the line 15 can be controlled.
- the pipe 15 can comprise a means 16 for controlling the circulation of the refrigerant fluid FR within the pipe 15.
- This means of control 16 can comprise or be constituted by an expansion device 17, the function of which is either to close the pipe 15, or to open it completely, or to implement a pressure drop so as to generate an expansion of the refrigerant fluid FR.
- the means 16 for controlling the circulation of the refrigerant fluid FR within the pipe 15 may comprise a first non-return valve 18.
- the latter thus allows circulation of the refrigerant fluid FR from the portion of the first branch 33 towards the second branch portion 39, and prohibits such circulation in the opposite direction, that is to say from the second branch portion 39 and towards the first branch portion 33.
- Circuit 1 may also include a first pipe 19 arranged in parallel with pipe 15, seen from the refrigerant fluid FR.
- the first pipe 19 thus extends from the portion of the second branch 39 to the portion of the first branch 33.
- the first pipe 19 extends between a third point 43 located in the portion of the second branch 39 and the first point 4L.
- the first pipe 19 may include a second non-return valve 20.
- the latter thus allows circulation of the refrigerant fluid FR from the portion of the second branch 39 to the portion of the first branch 33, and prohibits such circulation in the opposite direction, c ' that is to say from the portion of the first branch 33 and towards the portion of the second branch 39.
- Circuit 1 is likely to be used in simultaneous cooling mode for the electrical storage device 11 and the passenger compartment. This is particularly the case of a rapid charge imposed on the electrical storage device 11, while the occupants remain in the vehicle during the time of this rapid charge.
- the two compression devices 9, 13 are in operation and compress the refrigerant fluid FR. These two compression devices 9, 13 thus pooled make it possible to deliver the cooling power necessary for cooling the passenger compartment and the electrical storage device 11, without causing noise pollution, for example.
- the main heat exchanger 3 discharges the calories of the refrigerant fluid FR into the external air flow Fl.
- the refrigerant fluid FR then circulates both in the first branch 4 and in the second branch 5.
- the first expansion member 8 expands the refrigerant fluid FR and the first heat exchanger 10 cools the thermal storage device 11.
- the refrigerant fluid FR is sucked in by the first compression device 9.
- the second expansion member 12 expands the refrigerant fluid FR and the second heat exchanger 14 cools the interior air flow F2 sent into the passenger compartment.
- the refrigerant FR which leaves the second heat exchanger 14 is then sucked by the second compression device 13, after passing through the accumulation device 36.
- the pipe 15 can be traversed by a part of the refrigerant fluid FR which leaves the first heat exchanger 10, this part coming to join the portion 39 of the second branch 5.
- the second compression device 13 thus compresses a quantity of refrigerant fluid FR which corresponds to the sum of the refrigerant fluid which leaves the second heat exchanger 14 with the portion of refrigerant fluid which runs through the pipe 15.
- the expansion device 17 performs an expansion which manages the flow of the refrigerant fluid which is directed towards the first compression device 9 relative to the portion of refrigerant fluid which circulates in the pipe 15.
- Such an organization makes it possible to relieve the work of the first. compression device 9 by sending part of the refrigerant which has cooled the electrical storage device 11 to the second compression device 13.
- Such an organization makes it possible to reduce the size of the first compression device 9 and / or to reduce its speed by rotation. A reduction in the speed of rotation of the first compression device 9 thus makes it possible to reduce the noise generated. In other words, the acoustic comfort is improved.
- circuit 1 of the present invention the main characteristics of which are illustrated in FIGS. 3 and 4, the architecture of circuit 1 being moreover likely to be more complex. than those shown in Figures 1 and 2.
- a method of controlling the temperature of the electrical storage device 11, implementing such a refrigerant fluid circuit 1 FR, is a method during which the first compression device 9 and the second control device are simultaneously activated. compression 13 during rapid charging of the electrical storage device 11.
- the present invention thus makes it possible to simply ensure, at optimized costs, without excess consumption and at a reduced noise level, the heat treatment, by heating or cooling, of an electrical storage device, such as a battery or a battery pack, configured to supply electrical energy to an electric drive motor of the vehicle, as well as the thermal treatment of a passenger compartment, by heating or cooling an interior air flow sent into the passenger compartment.
- an electrical storage device such as a battery or a battery pack
- circuit architecture refrigerant fluid can be modified without harming the invention insofar as it fulfills the functions described in this document.
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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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1914531A FR3104495A1 (fr) | 2019-12-16 | 2019-12-16 | Circuit de fluide réfrigérant pour véhicule adapté à une charge rapide d’un dispositif de stockage |
PCT/FR2020/052246 WO2021123537A1 (fr) | 2019-12-16 | 2020-12-02 | Circuit de fluide réfrigérant pour véhicule adapté a une charge rapide d'un dispositif de stockage |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4077001A1 true EP4077001A1 (fr) | 2022-10-26 |
Family
ID=69743521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20828546.0A Pending EP4077001A1 (fr) | 2019-12-16 | 2020-12-02 | Circuit de fluide réfrigérant pour véhicule adapté a une charge rapide d'un dispositif de stockage |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230019811A1 (fr) |
EP (1) | EP4077001A1 (fr) |
CN (1) | CN114981105A (fr) |
FR (1) | FR3104495A1 (fr) |
WO (1) | WO2021123537A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230020285A (ko) * | 2021-08-03 | 2023-02-10 | 현대자동차주식회사 | 차량용 열관리시스템 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011000796B4 (de) * | 2011-02-17 | 2023-10-12 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Klimatisierungssystem für insbesondere ein Hybridfahrzeug |
CN104919264B (zh) * | 2013-03-06 | 2017-06-06 | 康奈可关精株式会社 | 复合型热交换器 |
US10443945B2 (en) * | 2014-03-12 | 2019-10-15 | Lennox Industries Inc. | Adjustable multi-pass heat exchanger |
DE102016201835B4 (de) * | 2016-02-08 | 2021-09-23 | Volkswagen Aktiengesellschaft | Klimatisierungsvorrichtung für ein Kraftfahrzeug |
DE102017214356A1 (de) * | 2017-08-17 | 2019-02-21 | Volkswagen Aktiengesellschaft | Klimatisierungsvorrichtung für ein Kraftfahrzeug und Verfahren zu deren Betrieb |
FR3075705B1 (fr) | 2017-12-21 | 2020-07-24 | Valeo Systemes Thermiques | Circuit de fluide refrigerant pour vehicule, adapte a une charge rapide d’un dispositif de stockage electrique |
FR3077337A1 (fr) * | 2018-01-31 | 2019-08-02 | Valeo Systemes Thermiques | Dispositif de conditionnement thermique pour vehicule automobile |
FR3080329B1 (fr) * | 2018-04-18 | 2020-03-20 | Valeo Systemes Thermiques | Circuit de fluide refrigerant pour vehicule, adapte a une charge rapide d'un dispositif de stockage electrique |
-
2019
- 2019-12-16 FR FR1914531A patent/FR3104495A1/fr not_active Ceased
-
2020
- 2020-12-02 WO PCT/FR2020/052246 patent/WO2021123537A1/fr unknown
- 2020-12-02 EP EP20828546.0A patent/EP4077001A1/fr active Pending
- 2020-12-02 US US17/785,569 patent/US20230019811A1/en active Pending
- 2020-12-02 CN CN202080093308.9A patent/CN114981105A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
FR3104495A1 (fr) | 2021-06-18 |
US20230019811A1 (en) | 2023-01-19 |
CN114981105A (zh) | 2022-08-30 |
WO2021123537A1 (fr) | 2021-06-24 |
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