EP2102576B1 - Modular exchanger for automotive refrigeration system - Google Patents
Modular exchanger for automotive refrigeration system Download PDFInfo
- Publication number
- EP2102576B1 EP2102576B1 EP08702246.3A EP08702246A EP2102576B1 EP 2102576 B1 EP2102576 B1 EP 2102576B1 EP 08702246 A EP08702246 A EP 08702246A EP 2102576 B1 EP2102576 B1 EP 2102576B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exchanger
- modular
- fluid
- plate
- plates
- 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.)
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Links
- 238000005057 refrigeration Methods 0.000 title claims description 12
- 239000012530 fluid Substances 0.000 claims description 58
- 239000003507 refrigerant Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 3
- 238000005219 brazing Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
- F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
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- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0012—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form
- F28D9/0018—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form without any annular circulation of the heat exchange media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0246—Arrangements for connecting header boxes with flow lines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
-
- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/04—Fastening; Joining by brazing
Definitions
- the present invention regards a modular exchanger for an automotive refrigeration system according to the preamble of claim 1.
- WO 99/66279 discloses such a modular exchanger.
- the automotive industry refrigeration systems comprise a circuit within which the refrigerant flows.
- Such circuit which in turn comprises a refrigerating exchanger which uses the external air, an expansion valve (lamination), an evaporator and a compressor.
- the use of the additional exchanger entails greater space requirements of the system and further piping of the refrigerant.
- an automotive refrigeration system 1 comprises a circuit 2 within which the refrigerant flows.
- a low pressure operating fluid Fb carbon dioxide, CO 2
- Fb low pressure operating fluid
- CO 2 carbon dioxide
- the pressurised fluid Fa is expanded and converted into low pressure fluid Fb which removes the enthalpy from the environment to be refrigerated.
- the circuit 2 comprises a refrigerating exchanger 3 which uses external air to cool the pressurised fluid Fa, downstream of the exchanger 3 the circuit is provided with an expansion valve 4 which provides for the lamination of the pressurised fluid Fa converting it into low pressure fluid Fb.
- an evaporator 5 which implements the useful effect of the system removing heat from the environment to be refrigerated according to the exchange indicated by arrow C2.
- the fluid Fb flowing out of the evaporator has two phases in that the evaporation is not complete and some drops of liquid L present are drawn by the vapour V.
- the fluid might also draw very small amounts of lubricating oil in form of drops.
- the system comprises an accumulator 6 arranged downstream of the evaporator and upstream of a compressor 7 and having the function of guaranteeing continuous flow of the fluid into the compressor 7.
- Such modular exchanger 10 is intended for the recovery of the enthalpy of the pressurised operating fluid Fa subsequently transferring it to the low pressure operating fluid Fb in such a manner to complete the evaporation of the fluid Fb.
- exchanger suitably provided with connections can be installed at any position within the system: on the accumulator, on the external air/CO2 exchanger, on the pipes, suitably according to the geometries of the system and depending on the components provided.
- the modular exchanger 10 comprises at least one exchanger pack 11 in turn comprising a battery of stacked exchange plates 20 and it is closed at the ends by a closure plate 12 and a base flange 13 respectively.
- Each exchange plate of the exchanger pack has a first surface 21 furrowed by a plurality of parallel grooves 22, and a second flat continuous surface 23, opposite to the first.
- the exchange plates 20 are juxtaposed in such a manner that the grooves 22 of an exchange plate define, cooperating with the continuous flat surface 23 of an overlapped plate, a series of parallel pipes 24 for the circulation of the pressurised operating fluid Fa or low pressure operating fluid Fb.
- the exchange plates are joined by means of brazing, preferably under vacuum, for air-tight sealing even when subjected to high pressure conditions.
- the exchanger pack or the overlapped exchanger packs, are fastened between the closure plate 12 and the base flange 13 which are provided with through holes 53, provided correspondingly also on the exchange plates 20, in order to allow fastening by means of bolts or by means of screws inter-engaged in corresponding holes 73 made on the upper portion of the accumulator 6 when the exchanger 10 is made in a manner such to be integrated with the latter.
- Such through holes 53 have the end 54, opening in the closure plate, widened to accommodate the head of the fastening screw.
- each of such exchange plates 20 is a plurality of first and second openings 51, 52 respectively having the inlet/outlet function or the function of passing the fluid Fa, Fb.
- a separation plate 15 provided with openings 51 and 52 and through holes 53 is interposed between the exchanger packs.
- the first exchange plate 20 of the first pack 11 present in the stack cooperates with the continuous flat surface 23 of the closure plate 12 for the formation of pipes 24 while the first plates of the other exchanger packs arranged below which may be present cooperate with the corresponding continuous flat surfaces 23 of the separation plates.
- the pressurised fluid Fa and the low pressure fluid Fb circulate without mixing, on alternating exchange plates 20.
- each exchange plate 20 The pipes 24 of each exchange plate 20 are arranged perpendicularly to the pipes 24 of the exchange plate arranged above and/or below.
- Each exchange plate thus comprises first openings 51 arranged at the ends of the grooves 22, wherein said grooves 22 converge allowing passage of the fluid between the corresponding exchange plates 20, in other words between alternating exchange plates.
- Such first openings 51 intercept two or more grooves and they are made offset along diametrically opposite edge portions of each exchange plate 20.
- such openings 51 are seven per each end of the series of parallel grooves 22, thus summing up to fourteen per each exchange plate and they are configured shaped in such a manner to optimise the resistance of the exchange plates to high operating pressures to which these are subject.
- each exchange plate is correspondingly provided with fourteen second openings 52 intended for the transfer of the fluid between alternating plates.
- the grooves 22 are made of different lengths in such a manner to keep their ends far apart and thus position the openings 51 or 53 offset distancing them from each other to obtain a greater structural resistance of the plate.
- the closure plate of the exchanger is also passed through by seats for the refrigerant transfer blocks, respectively a first seat 60 for the inlet of the pressurised refrigerant Fa and a second seat 61 for the outlet of the low pressure refrigerant Fb.
- the base flange 13 is provided with seats 80 and 83 in which the transfer nozzles are brazed, respectively an Fa fluid outlet nozzle 81 and an Fb fluid inlet nozzle 82, into the exchanger.
- Such seats 80, 83 open internally in two separated chambers 55 obtained on the surface of the flange 13 and which connect openings 51 52 respectively.
- Such nozzles 81, 82 can be directly inserted into corresponding holes made in the upper portion of the accumulator which, as required, is provided with seats 70 and 71.
- each seat is a threaded fastening hole 73 of the blocks to be inserted into the seat or of the end portion of the screws which secure the exchanger against the accumulator.
- the latter is shaped cylindrically and preferably it has a diameter substantially equivalent to the diameter of the accumulator in such a manner to be integrated with the latter into a single body, when assembled on the accumulator as shown in figure 6 .
- each exchanger pack includes sixteen alternating plates and the modular exchanger 10 has two exchanger packs.
- both such numbers may vary depending on the preset exchange parameters and the overall dimensions of the system.
- FIG 8b A further developed and alternative embodiment of the exchanger is illustrated in figure 8b and provides for a different sequence of the plates inside the exchanger packs.
- each exchanger pack includes fifteen plates arranged following the sequence described beforehand, and in the modular exchanger 10 there are two exchanger packs; both such numbers may vary depending on the preset exchange parameters and the overall dimensions of the system.
- FIG 7 Illustrated in figure 7 is a different embodiment of the modular exchanger 10 provided for allowing assembly of the modular exchanger and other devices present in the system, at any position in the system, such as for example on the external air/CO2 exchanger, on the pipes, in such a manner to be able to position the modular exchanger appropriately suiting its arrangement to the geometries of the system and depending on the components provided.
- the modular exchanger 10 bears two first blocks 33 respectively bearing an inlet pipe 30 for the pressurised Fa fluid and an outlet pipe 31 for the low pressure Fb fluid, and in the base flange 13 two second blocks respectively bearing an inlet pipe 90 for the low pressure Fb fluid and an outlet pipe 91 for the pressurised Fa fluid.
- Such blocks are provided with through holes 62' for fastening, by means of screws, the same against the holes 62 provided on the closure plate 12 and in the base flange 13.
- the exchanger can effectively be deemed to be a modular component suitably assemblable according to the manner, at the position and on the most convenient component in the referigeration system.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
- The present invention regards a modular exchanger for an automotive refrigeration system according to the preamble of
claim 1.WO 99/66279 - According to the known art, the automotive industry refrigeration systems, comprise a circuit within which the refrigerant flows.
- Such circuit which in turn comprises a refrigerating exchanger which uses the external air, an expansion valve (lamination), an evaporator and a compressor.
- In addition, recent systems are provided with an exchanger capable of recovering the enthalpy of the pressurised fluid in favour fluid the low pressure fluid.
- An example of a conditioning unit provided with an additional exchanger is indicated in the United States patent application
US2004/0055320 on behalf of Horstmann et al. - Generally, the use of the additional exchanger entails greater space requirements of the system and further piping of the refrigerant.
- In addition, the exchange efficiency is a very important parameter as far as the efficacy of the entire refrigeration system is concerned.
- Thus, currently there is need to manufacture an exchanger for an automotive refrigeration system occupying least space and capable of high exchange efficiency.
- The applicant observed that it was possible to meet said needs by providing a modular exchanger for an automotive refrigeration system which can be manufactured in one or more configured modules compatible with an accumulator of the refrigeration system.
- First said aspect of the invention is the subject of
claim 1. - Further aspects of the invention are the subject of the dependent claims.
- Characteristics and advantages of the modular exchanger for an automotive refrigeration system according to the present invention shall be clearer from the following exemplifying and non-limiting description with reference to the schematic drawings attached wherein:
-
Figure 1 is a schematic view of an automotive refrigeration system; -
Figures 2 and3 are exploded perspective views of a modular exchanger according to the invention; -
Figure 4 is an exploded perspective view of a pack of exchange plates of the modular exchanger according to the invention; -
Figure 5 is a cross-sectional schematic view of an exchanger according to the invention; -
Figure 6 is an exploded perspective view of an exchanger according to invention integrated to an accumulator; -
Figure 7 is a perspective view of an exchanger according to the invention provided with connections for installation; -
Figures 8a and 8b illustrate, in exploded perspective view, a pack of exchange plates of the modular exchanger respectively according to the initial embodiment and according to a further developed embodiment of the invention. - With reference to the figures, an
automotive refrigeration system 1 comprises acircuit 2 within which the refrigerant flows. - In the
system 1 which is substantially a compression refrigeration system, a low pressure operating fluid Fb, carbon dioxide, CO2, is subjected to compression which raises its pressure turning it into pressurised fluid Fa. - After transferring part of its enthalpy, according to the exchange indicated by the arrow C1, the pressurised fluid Fa is expanded and converted into low pressure fluid Fb which removes the enthalpy from the environment to be refrigerated.
- Thus the
circuit 2 comprises a refrigeratingexchanger 3 which uses external air to cool the pressurised fluid Fa, downstream of theexchanger 3 the circuit is provided with anexpansion valve 4 which provides for the lamination of the pressurised fluid Fa converting it into low pressure fluid Fb. - Provided downstream of such valve is an
evaporator 5 which implements the useful effect of the system removing heat from the environment to be refrigerated according to the exchange indicated by arrow C2. - The fluid Fb flowing out of the evaporator has two phases in that the evaporation is not complete and some drops of liquid L present are drawn by the vapour V.
- In addition, the fluid might also draw very small amounts of lubricating oil in form of drops.
- The system comprises an
accumulator 6 arranged downstream of the evaporator and upstream of acompressor 7 and having the function of guaranteeing continuous flow of the fluid into thecompressor 7. - Between the accumulator and the compressor, in the low pressure circuit portion, and correspondingly between the refrigerator and the expansion valve, in the pressurised pressure circuit, there is a
modular exchanger 10. - Such
modular exchanger 10 is intended for the recovery of the enthalpy of the pressurised operating fluid Fa subsequently transferring it to the low pressure operating fluid Fb in such a manner to complete the evaporation of the fluid Fb. - Such arrangement of the exchanger is strictly for exemplification purpose given that the exchanger suitably provided with connections can be installed at any position within the system: on the accumulator, on the external air/CO2 exchanger, on the pipes, suitably according to the geometries of the system and depending on the components provided.
- The
modular exchanger 10 comprises at least oneexchanger pack 11 in turn comprising a battery ofstacked exchange plates 20 and it is closed at the ends by aclosure plate 12 and abase flange 13 respectively. - Each exchange plate of the exchanger pack has a
first surface 21 furrowed by a plurality ofparallel grooves 22, and a second flatcontinuous surface 23, opposite to the first. - The
exchange plates 20 are juxtaposed in such a manner that thegrooves 22 of an exchange plate define, cooperating with the continuousflat surface 23 of an overlapped plate, a series ofparallel pipes 24 for the circulation of the pressurised operating fluid Fa or low pressure operating fluid Fb. - The exchange plates are joined by means of brazing, preferably under vacuum, for air-tight sealing even when subjected to high pressure conditions.
- The exchanger pack, or the overlapped exchanger packs, are fastened between the
closure plate 12 and thebase flange 13 which are provided with throughholes 53, provided correspondingly also on theexchange plates 20, in order to allow fastening by means of bolts or by means of screws inter-engaged incorresponding holes 73 made on the upper portion of theaccumulator 6 when theexchanger 10 is made in a manner such to be integrated with the latter. - Such through
holes 53 have theend 54, opening in the closure plate, widened to accommodate the head of the fastening screw. - Provided for in each of
such exchange plates 20 is a plurality of first andsecond openings - Should the exchanger be made up of several overlapped
exchanger packs 11, aseparation plate 15 provided withopenings holes 53 is interposed between the exchanger packs. - The
first exchange plate 20 of thefirst pack 11 present in the stack, cooperates with the continuousflat surface 23 of theclosure plate 12 for the formation ofpipes 24 while the first plates of the other exchanger packs arranged below which may be present cooperate with the corresponding continuousflat surfaces 23 of the separation plates. - Thus, the pressurised fluid Fa and the low pressure fluid Fb circulate without mixing, on
alternating exchange plates 20. - The
pipes 24 of eachexchange plate 20 are arranged perpendicularly to thepipes 24 of the exchange plate arranged above and/or below. - In such manner the flow of the pressurised fluid Fa is crossed with respect to the flow of the low pressure fluid Fb.
- Each exchange plate thus comprises
first openings 51 arranged at the ends of thegrooves 22, wherein saidgrooves 22 converge allowing passage of the fluid between thecorresponding exchange plates 20, in other words between alternating exchange plates. - Such
first openings 51 intercept two or more grooves and they are made offset along diametrically opposite edge portions of eachexchange plate 20. - In the exemplified embodiment,
such openings 51 are seven per each end of the series ofparallel grooves 22, thus summing up to fourteen per each exchange plate and they are configured shaped in such a manner to optimise the resistance of the exchange plates to high operating pressures to which these are subject. - In addition, each exchange plate is correspondingly provided with fourteen
second openings 52 intended for the transfer of the fluid between alternating plates. - As a matter of fact, for obvious machining costs reasons the plates are made in a single configuration and then they are mounted rotated by 90°.
- The
grooves 22 are made of different lengths in such a manner to keep their ends far apart and thus position theopenings - Alongside the
holes 53 and the their widenedends 54, the closure plate of the exchanger is also passed through by seats for the refrigerant transfer blocks, respectively afirst seat 60 for the inlet of the pressurised refrigerant Fa and asecond seat 61 for the outlet of the low pressure refrigerant Fb. - Provided in proximity to such outlet seats are threaded
holes 62 for fastening the blocks (not illustrated). - Correspondingly, the
base flange 13 is provided withseats fluid outlet nozzle 81 and an Fbfluid inlet nozzle 82, into the exchanger. -
Such seats separated chambers 55 obtained on the surface of theflange 13 and which connectopenings 51 52 respectively. -
Such nozzles seats - In particular, a pair of
seats seats - In addition, provided in proximity to each seat is a threaded
fastening hole 73 of the blocks to be inserted into the seat or of the end portion of the screws which secure the exchanger against the accumulator. - For a dimensional and performance optimisation of the exchanger, the latter is shaped cylindrically and preferably it has a diameter substantially equivalent to the diameter of the accumulator in such a manner to be integrated with the latter into a single body, when assembled on the accumulator as shown in
figure 6 . - According to the exemplified embodiment of the invention, each exchanger pack includes sixteen alternating plates and the
modular exchanger 10 has two exchanger packs. However, both such numbers may vary depending on the preset exchange parameters and the overall dimensions of the system. - A further developed and alternative embodiment of the exchanger is illustrated in
figure 8b and provides for a different sequence of the plates inside the exchanger packs. - While in the embodiment described up to now and also illustrated in
figure 8a there is an alternation between a first plate 20' within which the high pressure fluid Fa passes and asecond plate 20" within which a low pressure fluid Fb passes, in the further developed and alternative embodiment, the sequence of the plates is as follows: thesecond plate 20" within which the low pressure fluid Fb passes - the first plate 20' - within which the high pressure fluid Fa passes and once again thesecond plate 20" within which the low pressure fluid Fb passes; this sequence is repeated until the desired number of plates of the exchanger pack is obtained. - According to this further developed and alternative embodiment of the invention, each exchanger pack includes fifteen plates arranged following the sequence described beforehand, and in the
modular exchanger 10 there are two exchanger packs; both such numbers may vary depending on the preset exchange parameters and the overall dimensions of the system. - Illustrated in
figure 7 is a different embodiment of themodular exchanger 10 provided for allowing assembly of the modular exchanger and other devices present in the system, at any position in the system, such as for example on the external air/CO2 exchanger, on the pipes, in such a manner to be able to position the modular exchanger appropriately suiting its arrangement to the geometries of the system and depending on the components provided. - For such purpose, assembled on the
closure plate 12, themodular exchanger 10 bears twofirst blocks 33 respectively bearing aninlet pipe 30 for the pressurised Fa fluid and anoutlet pipe 31 for the low pressure Fb fluid, and in thebase flange 13 two second blocks respectively bearing aninlet pipe 90 for the low pressure Fb fluid and anoutlet pipe 91 for the pressurised Fa fluid. - Such blocks are provided with through holes 62' for fastening, by means of screws, the same against the
holes 62 provided on theclosure plate 12 and in thebase flange 13. - In such manner, the exchanger can effectively be deemed to be a modular component suitably assemblable according to the manner, at the position and on the most convenient component in the referigeration system.
Claims (14)
- Modular exchanger (10) for an automotive refrigeration system intended for recovering the enthalpy of the operating fluid (Fa, Fb) of the system, comprising at least an exchanger pack (11) in turn comprising a battery of stacked exchange plates (20), each exchange plate (20) having a first surface (21) furrowed by a plurality of parallel grooves (22), and a second flat continuous surface (23) opposite to the first, the exchange plates (20), being juxtaposed in such a manner that the grooves (22) of an exchange plate (20) define with the continuous flat surface (23) of a plate laid over the first, a series of parallel pipes (24) for the circulation of the pressurized (Fa) or low pressure (Fb) operating fluid, provided in each of such exchange plates (20) are a plurality of first openings (51) and second openings (52) respectively having the function of inlet/outlet or passing through of the fluid (Fa, Fb),
the pipes (24) of each exchange plate (20) are arranged perpendicularly to the pipes (24) of the exchange plate (20) arranged above and/or below, wherein each of said exchange plates (20) comprise first openings (51) arranged at the ends of the grooves (22), in which said grooves (22) converge to allow the passage of the fluid between alternating corresponding exchange plates (20),
characterized in that
the first openings (51) intercept two or more grooves (22) and are made offset along diametrically opposite edge portions of each exchange plate (20),
wherein the grooves (22) are made with different lengths in such a manner to keep their ends apart and thus position the openings (51, 52) offset, distancing them from each other to obtain a greater structural resistance of the exchange plate (20). - Modular exchanger (10) according to claim 1, wherein said at least one exchanger pack (11) is closed at the ends respectively by a closure plate (12) and by a base flange (13).
- Modular exchanger (10) according to claim 2, wherein the air-tight sealing joining of said exchange plates (20) can be performed by means of vacuum brazing.
- Modular exchanger (10) according to claim 1, wherein said exchanger pack (11), or overlapped exchanger packs (11), are fastened between the closure plate (12) and the base flange (13) which are provided with through holes (53), provided correspondingly also on the exchange plates (20), to allow fastening by means of bolts or by means of screws inter-engaging in corresponding holes (73) made on the upper portion of the accumulator (6) when the exchanger (10) is made in such a manner to be integrated with the latter.
- Modular exchanger (10) according to claim 1, wherein said openings (51) are seven per each end of the series of parallel grooves (22), thus summing up to fourteen per each exchange plate (20) and they are configured in a shaped manner.
- Modular exchanger (10) according to claim 5, wherein each exchange plate is additionally provided with fourteen second openings (52) intended for the transfer of the fluid between alternating plates.
- Modular exchanger (10) according to claim 1, wherein said closure plates (12) of the exchanger are not only passed through by the holes (52) and provided with widened ends (54) but are also passed through by seats for refrigerant transfer blocks, respectively a first seat (60), for the inlet of the pressurized fluid (Fa) and a second seat (61) for the outlet of the low pressure fluid (Fb), in proximity to such seats being provided threaded holes (62) for the fastening of the blocks.
- Modular exchanger (10) according to claim 7, wherein said base flange (13) is provided with inlet seats (80, 83) in which corresponding transfer nozzles are brazed, respectively nozzle (81) for the outlet of the fluid (Fa) and a nozzle (82) for the inlet of the fluid (Fb) into the exchanger.
- Modular exchanger (10) according to claim 8, wherein said nozzles (81, 82) are arranged to be inserted directly into the corresponding holes made on the upper portion of the accumulator which, as required, is provided with seats (70, 71, 72, 74), respectively, a pair of seats (70,72) for the passage of the pressurized fluid (Fa) which does not pass through the accumulator and a pair of seats (74, 71) respectively for inlet and outlet of the low pressure fluid (Fb) which passes through the accumulator, in proximity of each seat there is additionally a fastening threaded hole (73) for blocks to be inserted in the seat or of the end portion of the screws securing the exchanger against the accumulator.
- Modular exchanger (10) according to claim 9, wherein said exchanger (10) is made in a cylindrical shape and has a diameter substantially equivalent to the accumulator (6) in such a manner to integrate with the latter into a single body.
- Modular exchanger (10) according to claim 1, wherein each exchanger pack (11) includes sixteen plates (20) alternating according to the following sequence of two plates: a first plate (20') wherein the high pressure fluid (Fa) passes, a second plate (20") wherein the low pressure fluid (Fb) passes, the modular exchanger (10) being provided with two exchanger packs (11).
- Modular exchanger (10) according to claim 1, wherein each exchanger pack (11) is made up of fifteen plates (20) arranged repeating the following sequence of three plates: a second plate (20") wherein the low pressure fluid (Fb) passes, a first plate (20') wherein the high pressure fluid (Fa) passes and once again a second plate (20") wherein the low pressure fluid (Fb) passes, the modular exchanger (10) being provided with two exchanger packs (11).
- Modular exchanger (10) according to claims 11 and 12, wherein there is a separation plate (15) provided with openings (51, 52) and through holes (53) interposed between the exchanger packs.
- Modular exchanger (10) according to claim 1, wherein said modular exchanger (10) bears assembled in the closure plate (12) two first blocks (33) respectively bearing an inlet pipe (30) for the pressurized fluid (Fa) and an outlet pipe (31) for the low pressure fluid (Fb), and in the base flange (13) two second blocks respectively bearing an inlet pipe (90) for the low pressure fluid (Fb) and an outlet pipe (91) for the pressurized fluid (Fa).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000048A ITMI20070048A1 (en) | 2007-01-15 | 2007-01-15 | MODULAR EXCHANGER FOR AUTOMOTIVE REFRIGERATION SYSTEM |
PCT/IB2008/000084 WO2008087526A2 (en) | 2007-01-15 | 2008-01-09 | Modular exchanger for automotive refrigeration system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2102576A2 EP2102576A2 (en) | 2009-09-23 |
EP2102576B1 true EP2102576B1 (en) | 2017-03-29 |
Family
ID=39615703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08702246.3A Active EP2102576B1 (en) | 2007-01-15 | 2008-01-09 | Modular exchanger for automotive refrigeration system |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2102576B1 (en) |
IT (1) | ITMI20070048A1 (en) |
WO (1) | WO2008087526A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20120042713A (en) | 2009-02-04 | 2012-05-03 | 퍼듀 리서치 파운데이션 | Coiled and microchannel heat exchangers for metal hydride storage systems |
WO2010091171A1 (en) | 2009-02-04 | 2010-08-12 | Purdue Research Foundation | Finned heat exchangers for metal hydride storage systems |
FR3048769B1 (en) | 2016-03-14 | 2019-05-17 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | PROCESS FOR MANUFACTURING AT LEAST ONE PLATE HEAT EXCHANGER BY PLATE SUPERPOSITION WITH ALIGNMENT PATTERNS |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3484578B2 (en) * | 1992-09-18 | 2004-01-06 | 富士電機ホールディングス株式会社 | Heat exchanger for fuel cells |
AU4687799A (en) * | 1998-06-19 | 2000-01-05 | Zess Technologies, Inc. | Micro-channel heat exchanger |
US7343965B2 (en) * | 2004-01-20 | 2008-03-18 | Modine Manufacturing Company | Brazed plate high pressure heat exchanger |
JP2007529707A (en) * | 2004-02-24 | 2007-10-25 | スペグ カンパニー リミテッド | Micro heat exchanger for fuel cell and manufacturing method |
JP2006125767A (en) * | 2004-10-29 | 2006-05-18 | Tokyo Institute Of Technology | Heat exchanger |
-
2007
- 2007-01-15 IT IT000048A patent/ITMI20070048A1/en unknown
-
2008
- 2008-01-09 EP EP08702246.3A patent/EP2102576B1/en active Active
- 2008-01-09 WO PCT/IB2008/000084 patent/WO2008087526A2/en active Application Filing
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
WO2008087526A2 (en) | 2008-07-24 |
EP2102576A2 (en) | 2009-09-23 |
WO2008087526A3 (en) | 2008-10-23 |
ITMI20070048A1 (en) | 2008-07-16 |
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