EP2428746A1 - Echangeur de chaleur - Google Patents
Echangeur de chaleur Download PDFInfo
- Publication number
- EP2428746A1 EP2428746A1 EP10290484A EP10290484A EP2428746A1 EP 2428746 A1 EP2428746 A1 EP 2428746A1 EP 10290484 A EP10290484 A EP 10290484A EP 10290484 A EP10290484 A EP 10290484A EP 2428746 A1 EP2428746 A1 EP 2428746A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adapter plate
- tube
- heat exchanger
- opening
- electronics housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 85
- 238000004378 air conditioning Methods 0.000 claims abstract description 49
- 239000004020 conductor Substances 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 21
- 238000004382 potting Methods 0.000 claims description 13
- 239000000919 ceramic Substances 0.000 claims description 9
- 238000005476 soldering Methods 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000003570 air Substances 0.000 description 15
- 238000010292 electrical insulation Methods 0.000 description 9
- VIJSPAIQWVPKQZ-BLECARSGSA-N (2s)-2-[[(2s)-2-[[(2s)-2-[[(2s)-2-[[(2s)-2-[[(2s)-2-acetamido-5-(diaminomethylideneamino)pentanoyl]amino]-4-methylpentanoyl]amino]-4,4-dimethylpentanoyl]amino]-4-methylpentanoyl]amino]propanoyl]amino]-5-(diaminomethylideneamino)pentanoic acid Chemical compound NC(=N)NCCC[C@@H](C(O)=O)NC(=O)[C@H](C)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC(C)(C)C)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCCNC(N)=N)NC(C)=O VIJSPAIQWVPKQZ-BLECARSGSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 239000011888 foil Substances 0.000 description 6
- 238000004026 adhesive bonding Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
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- 229920006268 silicone film Polymers 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0429—For vehicles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0429—For vehicles
- F24H3/0435—Structures comprising heat spreading elements in the form of fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0429—For vehicles
- F24H3/0441—Interfaces between the electrodes of a resistive heating element and the power supply means
- F24H3/0447—Forms of the electrode terminals, e.g. tongues or clips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1863—Arrangement or mounting of electric heating means
- F24H9/1872—PTC
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
- H05B3/24—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor being self-supporting
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
- H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H2250/00—Electrical heat generating means
- F24H2250/04—Positive or negative temperature coefficients, e.g. PTC, NTC
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/016—Heaters using particular connecting means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/022—Heaters specially adapted for heating gaseous material
- H05B2203/023—Heaters of the type used for electrically heating the air blown in a vehicle compartment by the vehicle heating system
Definitions
- the invention relates to a heat exchanger according to the preamble of claim 1 and an automotive air conditioning system according to the preamble of claim 15.
- Automotive air conditioning systems serve to heat and / or to cool the air to be supplied to the interior of a motor vehicle.
- heat exchangers are used as electrical heaters to heat the air supplied to the interior.
- the electric heater includes PTC elements.
- Positive Temperature Coefficient (PTC) elements are current-carrying materials that have electrical resistance and can conduct electricity better at lower temperatures than at higher temperatures. Their electrical resistance thus increases with increasing temperature.
- the PTC element is generally made of ceramic and is a PTC thermistor. This raises regardless of the boundary conditions - such. B. applied voltage, nominal resistance or air flow to the PTC element - a very uniform surface temperature at the PTC element. Overheating can be prevented as they z. B. could occur with a normal heat-emitting heating wire, since regardless of the boundary conditions always about the same resistance and thus a substantially identical electrical heating power is applied.
- the heat exchanger comprises PTC elements, at least two electrical conductors by means of which electrical current is conducted through the PTC element and heat conducting elements, in particular fins or corrugated fins, by means of which the surface for heating the air is increased.
- PTC elements at least two electrical conductors by means of which electrical current is conducted through the PTC element and heat conducting elements, in particular fins or corrugated fins, by means of which the surface for heating the air is increased.
- motor vehicles are produced which have an exclusive electric drive or a hybrid drive. Automotive air conditioning systems for these motor vehicles generally no longer have a heat exchanger for heating the air through which cooling fluid flows. The entire heating power of the motor vehicle air conditioning system must therefore be applied by the electric heater or the PTC elements. For this reason, it is necessary, the PTC elements with high voltage, z. B. in the range of 50 to 600 volts instead of low voltage with 12 volts to operate.
- High voltage in an automotive air conditioning system is a security problem because, for example, by a human touch of high voltage parts
- the US 4,327,282 shows a heat exchanger with a PTC heating element.
- Current is passed through the PTC heating element by means of contact plates and an insulating layer is arranged on the contact plates.
- the components are held together by means of a U-shaped clip.
- a heat generating element of a heating device for air heating comprising at least one PTC element and voltage applied to opposite side surfaces of the PTC element electrical conductor tracks, wherein the two electrical conductor tracks are surrounded on the outside by a non-electrically conductive insulating layer.
- the object of the present invention is therefore to provide a heat exchanger and a motor vehicle air conditioning system in which a with electric current under high voltage, for. B. more than 50 V, operated heat exchanger without endangering the environment, especially people, can be operated.
- the heat exchanger and the vehicle air conditioning should be inexpensive to manufacture reliable in operation.
- a heat exchanger comprising at least one electrical resistance heating element, in particular at least one PTC element, at least two conductors electrically connected to the at least one electrical resistance heating element, in particular printed circuit boards, in order to conduct electrical current through the at least one electrical resistance heating element and thereby to heat the electrical resistance heating element, at least one heat conducting element for transmitting heat from the at least one electrical resistance heating element to a fluid to be heated, at least one electrical insulating element which electrically isolates the at least two conductors and preferably the at least one electrical resistance heating element, at least one tube Pipe opening, wherein the at least two conductors, the at least one electrical insulating element and the at least one electrical resistance heating element within at least one of the at least one tube limited cavity are arranged, wherein the heat exchanger comprises an adapter plate having at least one opening and a respective tube opening is arranged at an opening of the adapter plate and preferably the at least one tube to the adapter plate fluid-tight is connected and the adapter plate is fluid-tightly connected to
- the tubes which include the cavity, at least one electrical insulating element, at least one electrical resistance heating element, preferably a plurality of resistance heating elements, and the two conductors are arranged.
- the at least one tube at the upper end only a tube opening and in the remaining region of the tube, in particular at a lower end of the tube, the tube is fluid-tight manner, for. B. by means of a support plate or cover plate or due to the formation of the tube.
- the tube has only the (upper) tube opening, through which fluids can penetrate into the cavity enclosed by the tube.
- the heat exchanger preferably has a plurality of tubes and the upper ends of the tubes with the tube openings are arranged on the openings of the adapter plate, so that due to the fluid-tight arrangement of the tubes on the adapter plate exclusively through the openings of the adapter plate and the tube openings in the cavity Fluid could get.
- the adapter plate serves to connect, for example, an electronics housing in a fluid-tight manner with the adapter plate, so that the cavities of the tubes are completely sealed off from the environment, because the electronics housing is fluid-tightly connected to the adapter plate.
- the adapter plate thus serves as an interface for connection to other components, in particular an electronics housing for electronics, in particular power electronics, or an air conditioning housing.
- the components which are arranged in the cavity enclosed by the tube can be permanently sealed in a fluid-tight manner, and furthermore the supply of electric current to the electrical resistance heating elements is ensured.
- the electronics housing connected in a fluid-tight manner to the adapter plate has contact elements with which electrical current can be conducted to the resistance heating elements, preferably two Contact elements, and at least one or preferably two control current contact elements with which the power of the resistance heating elements can be controlled and / or regulated with the aid of electronics arranged in the electronics housing.
- these contact elements and preferably control current contact elements are sealed fluid-tight with respect to the electronics housing, so that the cavities are sealed fluid-tight with respect to the environment.
- a tube is disposed with one end to the tube opening within the opening of the adapter plate.
- the adapter plate preferably at the bottom, in each case at the opening to a groove surrounding the opening and a respective tube with the end at the tube opening is arranged in the groove on the adapter plate.
- the tube is externally fluid-tightly connected to the adapter plate.
- the geometry of the at least one tube on the outside at the end with the tube opening corresponds to the geometry of the opening of the adapter plate.
- the tube is fluid-tightly connected to the groove on the adapter plate.
- the geometry of the at least one tube at the pipe-open end corresponds to the geometry of the groove.
- the adapter plate is at least partially, in particular completely, made of metal, for.
- metal for.
- aluminum, steel or Stainless steel, or from, preferably thermoplastic, plastic and / or only through the opening of the adapter plate and the tube opening is a connection in the limited of the at least one tube cavity with respect to the at least one tube and the adapter plate and / or between the adapter plate and the electronics housing and / or between the adapter plate and the air conditioning housing
- a sealing element is arranged and in particular the sealing element is a seal, for.
- the sealing element is a seal, for.
- the at least one tube is fluid-tightly connected to the adapter plate, thereby taking into account only the adapter plate and only the tube, for example, without consideration, for example, a potting compound, only through the tube opening and only the opening of the adapter plate, a fluid in the enclosed by the pipe Cavity can get.
- the adapter plate is integrally formed and / or outside the electronics housing and on the electronics housing, a heat sink for cooling the electronics within the electronics housing is arranged.
- the at least one tube with the adapter plate material and / or positive and / or non-positively connected is connected.
- the at least one tube is connected to the adapter plate with a soldering, welding or adhesive connection and / or with a sealing element, for.
- a sealing ring the at least one tube is fluid-tightly sealed to the adapter plate, wherein the sealing element is preferably a separate component.
- the adapter plate is connected to the at least one tube with a detent, clips or Krimmitati.
- the at least one tube is mono- or multi-part in cross-section, in particular two-part, and / or the at least one tube is symmetrical or asymmetrical in cross section and / or the at least one tube is constructed from two half shells.
- the at least one electrical insulating element is a, preferably hardenable and / or hardened, potting compound and / or the at least one electrical insulating element is a molded seal, for.
- a tube a foil or a plate, in particular a ceramic plate, and preferably the plate is materially connected to the at least one electrical resistance heating element.
- the potting compound is a liquid, for.
- an oil in particular silicone oil, or a liquid organic compound or a solid, for.
- a powder or granules or a hardenable liquid plastic As a powder or granules or a hardenable liquid plastic.
- the potting compound and / or the molded seal d. H. the at least one electrical insulating element, with heat transferring or thermally conductive particles, for.
- the adapter plate comprises a first connecting portion for connection to an electronics housing and / or the adapter plate comprises a second connecting portion for connection to an air conditioning housing and / or the adapter plate is with the electronics housing and / or with the air conditioning housing material and / or shape and / or or non-positively connected and / or the adapter plate is connected to the electronics housing and / or to the air conditioning housing with a clip connection and / or a crimp connection and / or a screw connection.
- the adapter plate can be connected to the air conditioning housing.
- the geometry of the first connecting portion is complementary to the geometry of the electronics housing, which is to be connected in this area with the first connecting portion and analogously, the geometry of the adapter plate is connected to the second connecting portion complementary to that portion of the air conditioning housing, which with the second connection portion of the adapter plate is to bring into connection.
- the adapter plate with the electronics housing and / or with the air conditioning housing with a detachable connection, for.
- a screw or clip connection, or with a permanent connection for.
- a Krimmthetic or a soldering or welding connection connected for.
- a sealing element for.
- a seal in particular O-ring seal, or adhesive or silicone arranged as a sealing element for fluid-tight sealing between the adapter plate and the electronics housing and / or between the adapter plate and the air conditioning housing.
- the electronics housing and / or the air conditioning housing at least partially, in particular completely, made of metal, for. As aluminum or steel, or from, preferably thermoplastic, plastic.
- the sealing element between the adapter plate and the electronics housing and / or the air conditioning housing is resiliently biased and / or compressed to ensure a reliable seal.
- the at least one cavity wall comprises as a wall of the at least one tube in a cross section two broad side walls and one or two narrow side walls and / or the at least one cavity wall forms in a cross section a closed tube, in particular a flat tube.
- the at least one heat-conducting element comprises the at least one cavity wall and / or the at least one heat-conducting element comprises corrugated ribs which are arranged on the outside of the at least one cavity wall, in particular by means of soldering and / or the at least two conductors have no direct contact with the cavity at least one cavity wall.
- the corrugated ribs and the at least one cavity wall are connected to one another by gluing.
- At least one heat-conducting element in particular the at least one cavity wall and / or the corrugated fins, at least partially, in particular completely, consists of metal, for example aluminum or steel, or plastic.
- the at least one molded seal is elastic and / or the at least one molded seal consists at least partially of silicone or plastic or rubber and / or the at least one molded seal is non-positively and / or positively and / or materially connected to the at least one cavity wall. Due to elastic properties of the at least one molded seal, the at least one molded seal can be clamped within the cavity, ie between the cavity walls, by means of an elastic deformation of the at least one molded seal and thus connected non-positively.
- the at least one molded seal comprises heat-transmitting or thermally conductive particles, for.
- thermally conductive particles for example, alumina and / or silicon carbide and / or boron nitride.
- At least one electrical resistance heating element, the at least two conductors and the at least one electrical insulating element are connected to at least one heating composite, which or which is or are arranged in the at least one cavity.
- An automotive air conditioning system according to the invention comprises at least one heat exchanger described in this patent application.
- the at least one molded gasket is disposed between each of a wall of the at least one tube and a conductor, so that the at least two conductors are electrically insulated with respect to the at least one tube.
- the at least one tube is closed in a fluid-tight manner by a lower cover plate at a lower, second end.
- the lower second end is the other end of the tube which faces the upper first end with the tube opening.
- the at least one molded seal is formed as a shrink tube and the shrink tube is shrunk onto the at least two conductors by the shrink tube is heated.
- the at least one molded seal consists of an electrically insulating and thermally conductive material. Due to the geometric arrangement of the at least one molded seal within the heat exchanger, the at least two conductors and the at least one electrical resistance heating element are electrically insulated.
- the molded gasket is in a solid state of aggregation, i. H. not liquid or gaseous, even at high temperatures, eg. 70 ° C or 100 ° C.
- the at least one molded seal is a film or insulating film, for.
- a film or insulating film for.
- a polyimide film (Kapton film), (elastic) ceramic-filled film or a (elastic) ceramic-filled silicone film for.
- the heat exchanger has an IP protection class of 67, so that a sufficient waterproofness and dust tightness is present.
- the corrugated fins and the at least one tube are connected to each other by means of gluing and / or soldering and / or non-positively under prestress.
- the at least one heat-conducting element and / or the at least one electrical insulating element has a thermal conductivity of at least 1 W / mK, in particular at least 15 W / mK.
- the at least one electrical insulating element has an electrical insulation of at least 1 kV / mm, in particular at least 25 kV / mm.
- the at least one electrical insulating element preferably in cross section, has a dielectric strength of at least 1 kV.
- the at least one electrical insulating element has a thermal conductivity of at least 1 W / mK, in particular at least 15 W / mK.
- the at least one electrical insulating element can thus insulate well electrically and, on the other hand, can sufficiently conduct the heat from the electrical resistance heating element to the heat-conducting element or the heat-conducting elements.
- Fig. 1 shows an automotive air conditioning 24.
- an air conditioning case 26 having a bottom wall 27 and an outlet portion 29, a fan 25, an air filter 30, a refrigerant evaporator 31 and a heat exchanger 1 is arranged as an electric heater.
- the air conditioning housing 26 thus forms a channel 35 for passing the air.
- Walls 28 of the air conditioning housing 26 have on the inside a surface 36 which define the channel 35.
- the air for the interior of a motor vehicle is passed by means of the blower 25 through the air filter 30, the refrigerant evaporator 31 and the heat exchanger 1.
- the automotive air conditioning system 24 is thus not provided with a heat exchanger through which coolant flows for heating the air conducted through the motor vehicle installation 24.
- the air conducted by the motor vehicle air conditioning system 24 is electrically heated exclusively by means of the heat exchanger 1.
- the motor vehicle air conditioning system 24 is preferably used in a motor vehicle with exclusively electric drive or with a hybrid drive (not shown).
- the heat exchanger with high voltage eg. B. with more than 50 volts, for example, 60 V or 600 V, operated in order not to get too high currents and thus too thick power lines (not shown).
- a flat tube 13 designed as a tube 18 made of aluminum has two broad side walls 20 and two narrow side walls 21 (FIGS. Fig. 2 and 6 ) on.
- the wide and narrow side walls 20, 21 are thereby cavity walls 17, which enclose a cavity 19 within the tube 18.
- a narrow side wall 21 is connected to each other by means of a tongue and groove connection 15.
- two molded seals 23 are arranged as electrical insulating elements 22.
- the two form seals 23 are made of elastic silicone and each have a recess 14 on one side.
- two conductors 4 namely a first printed circuit board 6 and a second printed circuit board 7 are arranged.
- PTC elements 3 designed as electrical resistance heating elements 2 are arranged between the two circuit boards 6, 7 .
- the PTC elements 3 are connected to each other with the two printed circuit boards 6, 7 with adhesive.
- the two form seals 23 each have a slot 16 (FIG. Fig. 2 ), through which in each case an electrical contact plate 5 of the circuit board 6, 7 is guided.
- the tube 18 has an upper end 38 with a tube opening 37. At the bottom of the tube 18 is sealed fluid-tight.
- the two printed circuit boards 6, 7 are thus completely enclosed by the two molded seals 23, because the molded seals 23 on the edges outside of the recess 14 lie directly on one another and thereby also seal due to their elastic properties.
- the two printed circuit boards 6, 7 with the interposed three PTC elements 3 due to the electrical insulation of the molded seals 23 are electrically isolated and also fluid-tight due to the sealing properties of the two superimposed mold seals 23 completed.
- the electrical contacting of the two circuit boards 6, 7 takes place by means of unillustrated electrical lines to the contact plates 5.
- the two circuit boards 6, 7 with the three PTC elements 10 thereby constitute a heating unit 10.
- a heating coil 9 or the heat exchanger 1 is present.
- Several heater 9 as shown in FIG Fig. 4 can also be connected to a heat exchanger 1 with a larger number of heating registers 9 to each other ( Fig. 3 to 5 ).
- the manufacturing steps for arranging the Wienverbundes 8 in the flat tubes 13 are in the Fig. 7 to 9 shown.
- the flat tubes 13 are connected to the corrugated fins 12 by means of soldering in a brazing furnace.
- a spacer (not shown) is introduced into the tongue and groove joint 15 during soldering, so that the flat tubes 13 are not soldered to one another at the tongue and groove connection 15, that is, they are not materially connected to one another , become.
- the flat tubes 13 are opened in the region of the tongue and groove joint 15, so that the flat tubes 13 deform in the region of the lower narrow side walls 21, in particular bend.
- the opening of the flat tubes 13 with the corrugated fins 12 takes place accordion-like according to the illustration of Fig. 7 to Fig. 8 ,
- the heating composites 8 in the direction of the tube depth, ie perpendicular to a plane of the drawing Fig. 8 perpendicular longitudinal axis of the tube 18, are inserted into the flat tubes 13.
- the flat tubes 13 are again connected to the tongue and groove joint 15 and by pressing the tongue and groove joint 15 is a permanent attachment of the tongue and groove joint 15.
- the molded gaskets 23rd are made of silicone and elastically deformable and the size of the molded seals 23 is matched to the heating unit 10 to the effect that the heating composite 8 is slightly larger than the closed flat tube 13.
- the mold seals 23 are elastically deformed and biased during closing of the tongue and groove joints 15, thereby characterized the heating system 8 under bias between the cavity walls 17 of the flat tube 13, in particular between the broad side walls 20, the flat tube 13 is clamped and thus non-positively connected to the flat tube 13.
- a correspondingly directed force F is applied to the wide side walls 20 ( Fig. 9 ).
- the net height H N of the heat exchanger 1 as shown in FIG Fig. 4 is about 50 to 300 mm, preferably 100 to 200 mm and the mesh width B N is about 50 to 300 mm, preferably 100 to 200 mm.
- the transverse division Q ie the distance between the flat tubes 13 as shown in FIG Fig. 5 , is in this case between 5 and 30 mm, preferably 9 to 18 mm and the net depth T N as shown in FIG Fig. 5 is 6 to 60 mm, preferably 10 to 40 mm.
- the cavity 19 enclosed by the cavity walls 17 of the flat tube 13 is a void 32 in the region of the narrow side walls 21, ie in the void 32 only air ( Fig. 6 ). Deviating from this, in the empty spaces 32 as shown in FIG Fig. 6
- the molded gasket 23 may also be arranged with a corresponding other geometric design of the molded gasket 23 (FIG. Fig. 8 ).
- the tubes 18 are arranged in openings 39 of the adapter plate 34, not shown, analogous to the following embodiments.
- a first embodiment of the adapter plate 34 is shown with openings 39.
- the adapter plate 34 is made of thermoplastic Plastic or metal, especially aluminum, and is produced in a design as aluminum with deep drawing.
- the geometry of the openings 39 of the adapter plate 34 corresponds to the geometry of the tubes 18 at the upper end 38 (FIG. Fig. 2 ) of the tubes 18.
- the tubes 18 are inserted with the end 38 in the openings 39 of the adapter plate 34 ( Fig. 11 ) and with the adapter pad 34 cohesively, for example by means of soldering or gluing, connected.
- Fig. 11 are shown by the heating coil 9, only the tubes 18, but not the conductors 4, the electrical contact plates 5 and the electrical insulating element 22.
- the heating composite 8 is thus in Fig. 11 not shown.
- the hollow space 19 enclosed by the tube 18 due to the fluid-tight connection of the tubes 18 with the adapter plate 34, only through the opening 39 of the adapter plate 34 and the tube openings 37 a fluid-conducting connection into the cavity 19.
- Das in Fig. 11 illustrated tube 18 is in one piece in cross section and has two narrow side walls 21 and two wide side walls 20.
- a second embodiment of the adapter plate 34 is shown.
- the geometry of the openings 39 of the adapter plate 34 corresponds to the outside geometry of the tube 18 according to Fig. 12 and 14 , In this case, the tube 18 is constructed in two parts in cross section from two asymmetric half shells. Accordingly, the geometry of the openings 39 of the adapter plate 34 is formed.
- Fig. 14 is the adapter plate 34 according to FIGS. 12 and 13 shown with the Schuregistem 9.
- the adapter plate 34 serves as an interface for connection to other components, such as an electronics housing 43 with electronics (not shown), in particular a power electronics for controlling and / or regulating the power of the electrical resistance heating elements 2 in the individual heating 9.
- an electronics housing 43 with electronics not shown
- a power electronics for controlling and / or regulating the power of the electrical resistance heating elements 2 in the individual heating 9.
- a seal 45 as a sealing member 44 for example, a rubber elastic O-ring seal
- the electronics housing 43 is completely closed and has no openings or gaps in the environment, so that sealed in a fluid-tight connection of the electronics housing 34 with the adapter plate 34 due to the fluid-tight connection of the tubes 18 with the adapter plate 34, the cavity 19 fluid-tight with respect to the environment is.
- the electrical contact plates 5 and the formed as a tube 46 or foil 47 molded seal 23 are shown.
- the tube 46 which completely surrounds the heating unit 10, slightly led beyond the upper end 38 of the tubes 18, so that there is a sufficient distance from the two circuit boards 6, 7 to the tube 18. In this case, this distance is preferably 4 mm.
- the corrugated fins 12 shown as heat-conducting elements 11 between the tubes 18.
- Fig. 16 is a perspective view of the heat exchanger 1 in the air conditioning housing 26 is shown.
- the adapter plate 34 is fluid-tight with the electronics housing 43 and fluid-tightly connected to the air conditioning housing 26.
- the type of formation of the fluid-tight connection between the adapter plate 34 and the electronics housing 43 and the fluid-tight connection between the adapter plate 34 and the air conditioning housing 26 is identical. This makes it possible to fluid-tightly seal the cavity 19 enclosed by the tubes 18 with respect to the environment and, when high voltage is used in the electrical resistance heating elements 2, to provide reliable electrical insulation with respect to FIG To ensure the environment.
- Fig. 17 is a longitudinal section of the heat exchanger 1 according to Fig. 16 shown.
- the adapter plate 34 has a first connecting portion 41 for connecting the adapter plate 34 with the electronics housing 43 and a second connecting portion 42 for connecting the adapter plate 34 with the air conditioning housing 26.
- the Kümaanlagengephaseuse 26 and / or the electronics housing 43 with the adapter plate 34 form and / or material and / or non-positively connected, for example with an adhesive or solder joint or with the aid of a screw or locking connection (not shown).
- Both between the adapter plate 34 and the Elekfironikgephaseuse 43 to the first connecting portion 41 and between the Adapterplatter 34 and the air conditioner housing 26 to the second connecting portion 42 each have a sealing member 44, in particular a seal 45 is arranged.
- the seal 45 is preferably formed as an O-ring seal, which completely surrounds the first and / or second connecting section 41, 42, thereby forming a fluid-tight connection both at the first and at the second connecting section 41, 42 with respect to the air conditioning housing 26 and the electronics housing 43 is ensured.
- the sealing member 44 may either be a separate component or already be attached to the electronics housing 43 and / or the air conditioning housing 46 or integrated, for example, by inserting the sealing member 44 during injection molding of the electronics housing 43 made of plastic or the air conditioning housing 26 in the injection mold and molded or in a 2K injection molding process, the sealing element 44 is made on the remaining air conditioning housing 26 and / or the rest of the electronics housing 43.
- the tubes 18 are fluid-tightly connected to the adapter plate 34, for example, with an adhesive connection and arranged in the openings 39 of the adapter plate 34.
- Fig. 18 a cross section of the heating register 9 is shown in a second embodiment.
- the heating unit 10 is of a hose 46 or enclosed a foil bag and while the wall of the tube is formed as a film 47.
- the heating unit 10 is completely enclosed (the foil bag or tube 46 has an opening only at the top of the contact plates 5) by the tube 46 or foil bag and thus electrically insulated with respect to the tube 18 or the walls of the tube 18.
- the seal 45 or the molded seal 23 can also be provided with electrically conductive particles, in order to ensure a sufficient thermal thermal conductivity of the molded seal 23 in addition to the required electrical insulation.
- a third embodiment of the heating register 9 is shown.
- the molded seal 23 is formed as a ceramic plate 49 platelets 48 and within the tube 18 also has a position bar 50 is present.
- the position bar 50 prevents slippage of the heating unit 10 within the tube 18, so that a sufficient electrical insulation is ensured. Notwithstanding this (not shown) can also be dispensed with the position performance 50, provided that the ceramic plates 49 are materially bonded, for example by gluing, with the two conductors 24 and thus due to the sufficient rigidity of the ceramic plate 49 no longer the danger of slipping of the heating unit 10 within consists of the tube 18.
- a fourth embodiment of the heating register 9 is shown in a longitudinal section.
- the potting compound 51 is applied to the adapter plate 34 at the top.
- the flowable or liquid potting compound 51 can thus into the cavities 19 within the tubes 18th inflow and fill the empty cavities 19 outside the heating unit 10, thereby enabling electrical insulation.
- the adapter plate 34 is due to its geometry as "overflow lake" for the potting compound 51 and only the electrical contact plates 5 and possibly a small part of the circuit boards 4 are out of the potting compound 51 out.
- Fig. 21 a fourth embodiment of the adapter plate 34 is shown.
- the tubes 18 of the heating register 9 are not inserted into the openings 39 of the adapter plate 34, but the adapter plate 34 is provided with a the openings 39 completely circumferential groove 40 and in the groove 40, the ends 38 of the tubes 18 are arranged and with the adapter plate 34 mechanically connected to the groove 40 and fluid-tight manner.
- the connection can be made cohesively, for example by gluing, welding or soldering.
- FIGS. 22 to 24 a fourth embodiment of the adapter plate 34 is shown.
- the adapter plate 34 is connected by means of a clip connection 52 with the electronics housing 43 in this embodiment of the heat exchanger 1.
- the adapter plate 34 is provided with a total of six adapter plate tabs 57, in each case three adapter plate tabs 57 on one side of the adapter plate 34.
- that also has Electronics housing 43 at the bottom of six electronics housing tabs 56, three electronic housing tabs 56 on one side.
- Both the electronics housing tabs 56 and the adapter plate tabs 57 each have a tab opening 58 (FIG. Fig. 23 ) on.
- Fig. 22 shows a disconnected state of the electronics housing 43 with the adapter plate 34 and Fig.
- FIG. 22 shows a connected state of the adapter plate 34 with the electronics housing 43.
- a clip 59 is disposed with its ends at the upper end in the tab opening 58 of the electronics housing tab 56 and at the lower end of the tab opening 58 of the adapter plate tab 57.
- the clip 59 for example made of metal or plastic, is biased in this case and thereby the electronics housing tab 56 is pressed onto the adapter plate tab 57.
- the seal 45 between the electronics housing 43 and the adapter plate 34 an excess with respect to a recess in the electronics housing 43 and the Elektronikgephinuselasche 56, so that in the in Fig.
- the seal 45 is biased as elastic O-ring seal made of rubber and thereby a durable and reliable fluid-tight seal between the electronics housing 43 and the adapter plate 34 is ensured.
- the O-ring seal 45 is arranged completely circumferentially between the electronics housing 43 and the adapter plate 34.
- Fig. 24 and 25 is an addition to that in the Fig. 22 and 23 illustrated embodiment illustrated.
- the electronics housing 43 is provided with a heat sink 64 (FIG. Fig. 24 and 25 ) Mistake.
- the heat sink 64 is sealed fluid-tight with respect to the electronics housing 43 and disposed both within the electronics housing 43 and outside of the electronics housing 43.
- the heat sink 54 which is arranged outside the electronics housing 43, it is thus possible to generate heat from an electronic system (not shown), in particular power electronics, by means of heat conduction be discharged through the heat sink 64 to the ambient air. This is easily possible because the heat exchanger 1 is surrounded by ambient air.
- Fig. 26 and 27 is in addition to Fig. 15 the adapter plate 34 shown in the third embodiment. It is in the adapter plate 34 in the third embodiment according to the Fig. 15 . 26 and 27 the adapter plate 34 is connected to the electronics housing 43 by means of a crimp connection 53.
- the adapter plate 34 has a vertically aligned adapter wall 61 at the outer edge.
- the completely encircling and vertically oriented adapter wall 61 has only a small extent in the vertical direction and in this adapter wall 61 a multiplicity of oblong holes 60 are arranged.
- This part 62 of the adapter wall 61 can be deformed.
- the fluid-tight seal between the electronics housing 43 and the adapter plate 34 is carried out in an analogous manner as in the previous embodiment by a seal 45 as an elastic O-ring seal, which is resiliently biased.
- the electronics housing 43 with the bottom opening is first to be introduced into the area or space between the vertically aligned adapter wall 61 and placed on the seal 45 and pressed until the seal 45 is elastically pretensioned. Subsequently, on the part 62 of the adapter wall 61 above the elongated hole 60 (in Fig.
- a fifth embodiment of the adapter plate 34 is shown.
- the adapter plate 34 is releasably connected to the electronics housing 43 by means of a screw connection 54.
- the adapter plate 34 has in an analogous manner to the fourth embodiment according to FIGS. 22 to 24 a total of six adapter plate tabs 57, wherein in each case three are arranged on one side.
- the electronics housing 43 has a total of six electronic housing tabs 56, of which three are arranged on each side and in Fig. 28 only three electronic housing tabs 56 are visible due to the perspective view.
- the electronics housing tabs 56 each have a blind hole with a thread.
- the adapter plate tabs 57 have a bore through which a screw 63 can be inserted from below, and due to a screw head having a larger diameter than the bore in the adapter plate tab 57, the head of the screw 63 rests on the adapter plate tab 57.
- the electronics housing 43 is placed on the adapter plate 34 to the effect that the blind holes in the electronics housing tabs 56 are aligned with the holes in the adapter plate tabs 57 and then by means of a screwdriver, the screw 63 with an external thread with the internal thread in the Blind holes of the electronics housing tabs 56 are screwed.
- a lower end of the tubes 18 of the heat exchanger 1 is by means of a cover plate 55 as shown in FIG Fig. 28 and 29 sealed fluid-tight. In this case, the cover plate 55 is connected to the tubes 18, for example by means of a solder connection. This also applies to the tubes 18 of the heat exchanger 1 in the in Fig. 22 illustrated embodiment.
- the individual heating coil 9 of the heat exchanger 1 can be mechanically connected to the adapter plate 34 to a heat exchanger 1 with a plurality of heating coils 9.
- the heating coil 9 and the tubes 18 of the heating coil 9 are arranged fluid-tight at the openings 39 of the adapter plate 34, so that in a simple manner, a fluid-tight sealing of the heater 9 is possible with respect to the environment.
- an electronics housing 43 can be attached to the adapter plate 34 in a fluid-tight manner, thereby permitting permanent electrical insulation of the heat exchanger 1 with little technical outlay. As a result, a permanent contact protection of the electrically conductive parts of the heat exchanger 1 is possible.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP10290484.4A EP2428746B8 (fr) | 2010-09-13 | 2010-09-13 | Echangeur de chaleur |
US13/231,556 US9915441B2 (en) | 2010-09-13 | 2011-09-13 | Heat exchanger |
CN201110270298.4A CN102434968B (zh) | 2010-09-13 | 2011-09-13 | 热交换器 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP10290484.4A EP2428746B8 (fr) | 2010-09-13 | 2010-09-13 | Echangeur de chaleur |
Publications (4)
Publication Number | Publication Date |
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EP2428746A1 true EP2428746A1 (fr) | 2012-03-14 |
EP2428746B1 EP2428746B1 (fr) | 2015-04-08 |
EP2428746B2 EP2428746B2 (fr) | 2021-08-18 |
EP2428746B8 EP2428746B8 (fr) | 2021-12-29 |
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ID=43513963
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EP10290484.4A Active EP2428746B8 (fr) | 2010-09-13 | 2010-09-13 | Echangeur de chaleur |
Country Status (3)
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US (1) | US9915441B2 (fr) |
EP (1) | EP2428746B8 (fr) |
CN (1) | CN102434968B (fr) |
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---|---|---|---|---|
EP2607121B2 (fr) † | 2011-12-22 | 2020-07-08 | Eberspächer catem GmbH & Co. KG | Dispositif de chauffage électrique, en particulier pour un véhicule automobile |
CN102607178A (zh) * | 2012-03-25 | 2012-07-25 | 唐向平 | 电加热器 |
CN102607178B (zh) * | 2012-03-25 | 2014-01-08 | 唐向平 | 电加热器 |
US10363797B2 (en) | 2013-06-03 | 2019-07-30 | Borgwarner Ludwigsburg Gmbh | Vehicle heater |
DE102013105686B4 (de) * | 2013-06-03 | 2015-10-08 | Borgwarner Ludwigsburg Gmbh | Fahrzeugheizung |
DE102013105686A1 (de) * | 2013-06-03 | 2014-12-04 | Borgwarner Beru Systems Gmbh | Fahrzeugheizung |
EP2860470A1 (fr) * | 2013-10-04 | 2015-04-15 | Delphi Technologies, Inc. | Échangeur de chaleur présentant plusieurs modules thermoélectriques connectés en série |
EP3101365A1 (fr) * | 2015-06-02 | 2016-12-07 | Eberspächer catem GmbH & Co. KG | Procédé de fabrication d'un dispositif de chauffage électrique |
EP3273177A1 (fr) | 2016-07-18 | 2018-01-24 | Eberspächer catem GmbH & Co. KG | Dispositif de chauffage électrique |
DE102016122767A1 (de) * | 2016-11-25 | 2018-05-30 | Dbk David + Baader Gmbh | Fluidheizer |
EP3731595A1 (fr) | 2019-04-24 | 2020-10-28 | Eberspächer catem GmbH & Co. KG | Élément chauffant ptc et dispositif chauffant électrique doté d'un tel élément chauffant ptc et procédé de fabrication d'un élément chauffant ptc |
US11913676B2 (en) | 2019-04-24 | 2024-02-27 | Eberspächer Catem Gmbh & Co. Kg | PTC heating element and electric heating device with such a PTC heating element and method for the production of a PTC heating element |
WO2021155997A1 (fr) * | 2020-02-05 | 2021-08-12 | CIRCINO Innovation UG | Dispositif de chauffage électrique et procédé de fabrication d'un dispositif de chauffage |
CN114080070A (zh) * | 2020-08-13 | 2022-02-22 | 埃贝赫卡腾有限两合公司 | 电加热装置和用于制造该电加热装置的方法 |
EP3958649A1 (fr) * | 2020-08-13 | 2022-02-23 | Eberspächer catem GmbH & Co. KG | Dispositif de chauffage électrique et son procédé de fabrication |
CN114080070B (zh) * | 2020-08-13 | 2024-06-14 | 埃贝赫卡腾有限两合公司 | 电加热装置和用于制造该电加热装置的方法 |
DE102023102629A1 (de) | 2023-02-02 | 2024-08-08 | Eberspächer Catem Gmbh & Co. Kg | Elektrische Heizvorrichtung und Verfahren zu deren Herstellung |
Also Published As
Publication number | Publication date |
---|---|
CN102434968A (zh) | 2012-05-02 |
EP2428746B1 (fr) | 2015-04-08 |
US20120061366A1 (en) | 2012-03-15 |
EP2428746B8 (fr) | 2021-12-29 |
EP2428746B2 (fr) | 2021-08-18 |
US9915441B2 (en) | 2018-03-13 |
CN102434968B (zh) | 2015-10-28 |
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