EP3027998A1 - Evaporator heat exchanger - Google Patents
Evaporator heat exchangerInfo
- Publication number
- EP3027998A1 EP3027998A1 EP13745400.5A EP13745400A EP3027998A1 EP 3027998 A1 EP3027998 A1 EP 3027998A1 EP 13745400 A EP13745400 A EP 13745400A EP 3027998 A1 EP3027998 A1 EP 3027998A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- leakage
- channel
- heat exchanger
- disk
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 94
- 238000001704 evaporation Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000004044 response Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 44
- 239000003570 air Substances 0.000 description 13
- 238000002485 combustion reaction Methods 0.000 description 11
- 229910000679 solder Inorganic materials 0.000 description 8
- 238000012546 transfer Methods 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000001476 alcoholic effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
- F28F3/005—Arrangements for preventing direct contact between different heat-exchange media
-
- 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
- F25B49/00—Arrangement or mounting of control or safety 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
- F25B39/00—Evaporators; Condensers
-
- 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
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
- F25B39/022—Evaporators with plate-like or laminated elements
- F25B39/024—Evaporators with plate-like or laminated elements with elements constructed in the shape of a hollow panel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/16—Safety or protection arrangements; Arrangements for preventing malfunction for preventing leakage
Definitions
- the present invention relates to an evaporator heat exchanger for
- Exhaust gas cooler is used, heat is removed from the exhaust gas to evaporate the working fluid.
- the exhaust gas is cooled by the evaporation of the fluid to be evaporated and then returned to the engine together with the fresh air.
- the main exhaust gas flow is to be used as a heat source, here in a so-called
- Main exhaust evaporator also vaporize working medium.
- Such a main exhaust gas evaporator is usually from the vehicle manufacturers behind the muffler or behind the entire exhaust aftertreatment arranged in the exhaust system.
- the charge air can be used as a heat source in turbocharged engines.
- Evaporator heat exchanger for vaporizing liquid working fluid and the use of waste heat of an internal combustion engine known.
- an introduction of the working medium in the known system an introduction of the working medium in the known system.
- Combustion engine supplied combustion air due to leakage or leakage at the evaporator heat exchanger substantially
- At least one first flow channel is formed by at least one first limiting component and at least one second flow channel of at least one second limiting component, wherein at least one of these limiting components is a fluid-conducting connection in the environment or in a receiving space, so that at a leakage at the boundary components Working medium in the environment or in the receiving space can be introduced.
- Evaporator heat transfer provide to reduce the risk of mixing gas and working fluid. For example, if a fluorinated refrigerant flows into the exhaust gas and is supplied to the internal combustion engine and burned in the latter, hydrofluoric acid is produced, which can escape from an exhaust pipe and cause damage there. If, for example, an alcohol is used instead of this refrigerant, then in the event of leakage the alcohol would be in the
- the present invention therefore deals with the problem of an improved for an evaporator heat exchanger of the generic type
- the present invention is based on the general idea, a
- the inventive evaporator heat exchanger for vaporizing liquid working medium in this case has a housing in which said first flow channel for passing the working medium and the second flow channel to
- Passage of the gas are arranged.
- the gas for example, charge air or exhaust gas
- an evaporation of the same whereby this then in a
- Expansion machine for example, in a turbine, can be relaxed and thereby performs mechanical work.
- Disk package thus the first flow channel and the at least one fluidly separated from it leakage channel or leakage chamber accommodated.
- the connection between the two cover plates and the interposed fluid disc is cohesively, for example via a solder joint.
- a second flow channel is arranged between two adjacent disk packages, in which the heat-transferring gas, for example exhaust gas or charge air, flows. If the fluid disk breaks and / or the solder seam between the fluid disk and the cover plate fails, the working medium is passed from the first one
- Flow channel in the leakage channel or in the leakage chamber can be removed from there, without leading to a direct mixing with the flowing gas in the second flow channel, such as exhaust gas leads.
- the leakage channel or the leakage chamber also for
- Discharging discharged from the second flow channel undesirably gas used for example, if a loosening of a solder joint between the fluid disk and the cover plate or breaking a wall of the fluid disk would lead to a fluidic connection between the leakage channel and the second flow channel.
- the gas now flowing into the leakage channel or into the leakage chamber can be removed, thereby avoiding direct mixing with the working medium in the first flow channel.
- Leakage space thus forms a natural, between the two
- the leakage channel or the leakage chamber is usually filled with air.
- the strength of a material of the fluid disk is less than the strength of a cover plate arranged on the fluid disk. This causes a kind of predetermined breaking point of the fluid disk, so that in case of overload of the
- Evaporator heat exchanger in the region of the first flow passage is a passage of the guided in the first flow channel working fluid into the leakage channel. For example, breaks the fluid disk and expands Under circumstances, the cover plate delimiting the first flow channel and compresses the arranged, for example, in the second flow channel
- Solder fluid disk with this cover plate connecting solder seam, whereby a fluidic connection between the first flow channel and the
- Leakage channel is created. From this, the working medium can be removed without mixing with the gas flowing in the second flow channel. In the same way, such a predetermined breaking point can also be formed by a smaller wall thickness or material thickness of the fluid disk in comparison to the cover plates connected thereto. It is always important that, in the event of an overload, the fluid disk first breaks or tears and not the
- leakage channel or leakage chamber for discharging the working medium or the gas can be used.
- the leakage channel or the leakage chamber are preferably embossed circumferentially on the fluid disk, larger areas being designated as a leakage space and a smaller one as a leakage channel.
- the evaporator heat exchanger has a plurality of stacked one above the other
- Disk packages with each arranged therebetween second flow channel wherein the leakage channel and / or the leakage chamber of a fluid disk having a first opening and a plurality of opposing cover plates of two adjacent disk packages each having a second opening, wherein between the second openings a leakage bushing to form a (leakage -) outlet channel is arranged.
- the housing has a housing opening, which is connected via a housing cover bushing to the first or the second opening in the cover plate of a disk package arranged adjacent to the housing.
- Housing corner bushing and all other leakage bushing thereby form an outlet channel, also called leak discharge passage, for the passage of the leakage fluid, wherein at the housing cover bushing a line in the
- the fluid disk breaks and / or tears and thus an outlet of working medium from the first flow channel or gas from the second flow channel into the leakage channel, the pressure, the temperature and / or the pressure change in this chemical composition, since the leakage fluid, whether exhaust or working fluid, other physical and / or chemical properties than air.
- the sensor which indicates a leak, it can for example control a pump or an exhaust gas recirculation valve conveying the working medium as a function of the signal detected by the sensor.
- the output of a warning signal which visually and / or acoustically indicates a malfunction of the user of the motor vehicle
- Evaporator heat exchanger indicates. As described above, the ambient air pressure of approximately 1 bar is usually applied to the sensor. If the evaporator heat exchanger is put into operation, the pressure rises in the
- Leakage chamber has a leak, via which a pressure reduction takes place can. If the pressure increases significantly during operation of the evaporator heat exchanger, this usually indicates a leakage of the first
- Fig. 1 is a view of an inventive
- Fig. 2 is a sectional view through the evaporator heat exchanger in
- Range of first and second flow channels in intact condition 3 is a representation as in FIG. 2, but with a broken fluid disk and the passage of working fluid into a leakage channel, FIG.
- FIG. 4 shows a representation as in FIG. 3, but with a transfer of gas from the second flow channel into the leakage channel, FIG.
- Fig. 7 is a sectional view through the evaporator heat exchanger in
- FIG. 8 shows a representation as in FIG. 7, but in the region of an outlet channel for leakage fluid, FIG.
- Fig. 9 is a pressure-time diagram with different curves on
- Evaporator heat exchanger 1 for evaporating liquid working medium 2 (see also Figs., 2 to 4), a housing 3, in which a first
- Flow channel 4 for passing the working medium 2 and a second flow channel 5 are arranged for passing a gas 6.
- a heating of the working medium 2 takes place by a heat transfer of the gas 6, for example, exhaust gas or charge air.
- the first flow channel 4 is now formed by two cover plates 7 and 8 and an interposed and profiled fluid disk 9, wherein the fluid disk 9 together with the two cover plates 7 and 8 at least one of the two flow channels 4, 5 separate leakage channel 10 and
- Leakage chamber 1 1 limited.
- the respective leakage channel 10 and the leakage chamber 1 1 are laterally next to or
- the leakage channel 10 creates a barrier between the two flow channels 4, 5, so that no direct mixing of the working medium 2 with the gas 6 and thus damage to an internal combustion engine can take place.
- evaporator heat exchanger flows to be evaporated
- a fluorinated refrigerant such as e.g. R245fa is used in the
- Combustion engine are burned, resulting in toxic hydrofluoric acid. This would leak at the exhaust and could cause damage there. If, instead of such a refrigerant, alcohol, e.g. Ethanol or methanol used, it would be burned in a leakage of this in the internal combustion engine, which would be reflected in a sudden increase in power of the engine. In particular, inexperienced drivers would be exposed to an increased risk of accidents.
- alcohol e.g. Ethanol or methanol
- Leakage space 1 can be reliably prevented at a virtually any failure of the fluid disk 9, a mixing of the gas 6 with the working medium 2.
- the strength of the material for the fluid disk 9 is less than the strength of the fluid disk 9 connected to the cover plates 7, 8, so that the Fluid disk 9 generally a kind of predetermined breaking point in the system of
- Disk package 12 represents. Similarly, such
- Predetermined breaking point can also be realized by a smaller wall thickness or material thickness of the fluid disk 9 with respect to the wall thickness or material thickness of the cover plates 7, 8.
- Fig. 2 is the evaporator heat exchanger 1 in normal
- gas in particular exhaust gas
- a rib structure 13 may be arranged in the second flow channel 5, i. between two disc packages 12.
- a connection of the fluid disk 9 with the two cover plates 7, 8 and also a connection of the rib structure 13 with the respective cover plates 7, 8 takes place preferably cohesively, in particular via a solder joint 14.
- Fig. 3 now a failure of the fluid disk 9 is shown, in which the mean fluid disk 9 is broken and thereby has led to a deformation or an upward bending of the larger-sized cover plate 7. The deformation of the cover plate 7 in turn leads to a release of
- Solder connection 14 whereby the existing in the first flow channel 4 working fluid 2 can flow into the leakage channel 10.
- FIG. 4 a case is shown in which the fluid disk 9 has also been broken due to an overload, thereby creating a fluidic connection between the second flow channel 5 and the leakage channel 10.
- the gas 6 passing from the second flow channel 5 can be removed via the leakage channel 10, without interfering with the working medium 2 in the first flow channel 4 to mix.
- Leakage channel 10 and intervening leakage chambers 1 1 recognize.
- a fluid supply 15 and a fluid discharge 16 via which the fluid disk 9 working medium 2 can be supplied or discharged from this again.
- the fluid disk 9 has a first opening 17, via which the leakage channel 10 or the leakage chamber 11 are connected to a (leakage) outlet channel 18 (see FIG.
- a plurality of opposing cover plates 7, 8 of two adjacent disk packs 12 additionally each have a second opening 19, wherein between two second
- the cover plates 7, 8 each have a third opening 21 for the passage of the working medium 2 through the first flow channel 4, wherein the third openings 21 between opposing cover plates 7, 8 of two adjacent each disc packs 12 are interconnected by a fluid sleeve 22 and the fluid sockets 22 have an at least partially circumferential, separated from the first flow channel 4 Fluidbuchsenringkanal 23 which is connected to the leakage channel 10 and / or the leakage chamber 1 1 of the fluid disk 9 of the disk package 12 , This can also be done a backup against from the fluid sockets 22 undesirable emerging working medium 2 are created.
- the third openings 21 together with the fluid bushes 22 arranged therebetween and the fluid supply 15 or fluid discharge 16 arranged in alignment therewith form a corresponding fluid supply channel 24 or fluid discharge channel 25 in the fluid disks 9.
- FIG. 7 shows a sectional view through the evaporator heat exchanger 1 according to the invention in the region of the fluid feed channel 24 and the fluid discharge channel 25, respectively.
- the uppermost fluid bushing 22 is welded to the housing 3 via a welded joint 26 in a fluid-tight manner. Between each two adjacent fluid bushings 22, a disk pack 12 with two cover plates 7, 8 and interposed or soldered fluid disk 9 can be seen.
- Fig. 8 is a sectional view through the invention
- Evaporator heat exchanger 1 shown in the region of the outlet channel 18, wherein the uppermost leakage bushing 20 is in turn welded fluid-tightly to the housing 3 via a welded joint 26.
- the individual disk packs 12, in turn consisting of the two cover plates 7, 8 and the fluid disk 9 arranged therebetween, are soldered in a fluid-tight manner both to one another and to the individual leakage bushings 20 via a respective solder joint 14.
- the uppermost leakage bushing 20 is also called
- Housing cover bushing 27 denotes. Connected to the housing cover bushing 27 is a line 28 (see FIG. 1) extending further from the evaporator heat exchanger 1 into the environment or the periphery. In line 28 and the outlet channel 18, a sensor 29 may be provided to the
- Control device 30 which is used to evaluate a signal detected by the sensor 29, in particular the pressure, the flow and / or chemical composition of the fluid, in particular the leakage fluid, in the line 28 and for controlling / regulating a pump or the pumping medium which is not shown in the drawing a likewise not shown
- Exhaust gas recirculation valve is formed in response to the detected signal.
- At the sensor 29 is usually the ambient air pressure of about 1 bar, if the evaporator heat exchanger 1 is turned off and
- Vaporiser 1 put into operation and the pressure does not rise, which is also shown with the curve A in Fig. 9, either the sensor 29 is defective or the line 28 and the leakage channel 10 have a leak.
- the pressure increases significantly when the working medium 2 enters the leakage channel 10, which is shown in FIG. 9 with the curve C, and slightly less, if the fluid disk 9 in the direction of the second flow channel 5 breaks and thus a passage of gas 6 takes place in the leakage channel 10, which is shown in FIG. 9 with the curve D.
- the operation of the leakage channel 10 can be checked at each restart of the engine or the system, which also a high reliability can be guaranteed. Also, due to the curve can be closed directly on the failure mode.
- the evaporator heat exchanger 1 according to the invention has the following advantages:
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2013/066248 WO2015014406A1 (en) | 2013-08-02 | 2013-08-02 | Evaporator heat exchanger |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3027998A1 true EP3027998A1 (en) | 2016-06-08 |
EP3027998B1 EP3027998B1 (en) | 2017-03-22 |
Family
ID=48917536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13745400.5A Not-in-force EP3027998B1 (en) | 2013-08-02 | 2013-08-02 | Evaporator heat exchanger |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160178260A1 (en) |
EP (1) | EP3027998B1 (en) |
JP (1) | JP6313855B2 (en) |
WO (1) | WO2015014406A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014225059B4 (en) * | 2014-12-05 | 2022-01-27 | Robert Bosch Gmbh | Method for operating a waste heat utilization arrangement |
US20200025641A1 (en) * | 2018-07-18 | 2020-01-23 | Ling Long | Leak-detachable liquid-heat-transmission device |
CN110285689A (en) * | 2019-07-25 | 2019-09-27 | 无锡宏盛换热器制造股份有限公司 | A kind of cooler with current by pass preventing cold and hot medium string leakage |
US11649759B2 (en) * | 2021-10-12 | 2023-05-16 | Transportation Ip Holdings, Llc | System and method for thermal management |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2846198A (en) * | 1953-11-27 | 1958-08-05 | Ici Ltd | Heat exchangers |
US3517731A (en) * | 1967-09-25 | 1970-06-30 | United Aircraft Corp | Self-sealing fluid/fluid heat exchanger |
JP3629900B2 (en) * | 1997-07-04 | 2005-03-16 | 株式会社デンソー | Heat exchanger |
US6401804B1 (en) * | 1999-01-14 | 2002-06-11 | Denso Corporation | Heat exchanger only using plural plates |
JP2002350084A (en) * | 2001-05-28 | 2002-12-04 | Matsushita Electric Ind Co Ltd | Multilayer heat-exchanger |
JP4533795B2 (en) * | 2005-05-06 | 2010-09-01 | 三菱重工業株式会社 | Plate fin heat exchanger |
DE102010031561A1 (en) * | 2010-07-20 | 2012-01-26 | Behr Gmbh & Co. Kg | System for using waste heat from an internal combustion engine |
DE202010015374U1 (en) * | 2010-11-02 | 2011-02-10 | Abb Technology Ag | Heat exchanger module and heat exchanger |
US9163882B2 (en) * | 2011-04-25 | 2015-10-20 | Itt Manufacturing Enterprises, Inc. | Plate heat exchanger with channels for ‘leaking fluid’ |
US9004463B2 (en) * | 2012-12-17 | 2015-04-14 | Baltimore Aircoil Company, Inc. | Cooling tower with indirect heat exchanger |
-
2013
- 2013-08-02 JP JP2016530359A patent/JP6313855B2/en active Active
- 2013-08-02 EP EP13745400.5A patent/EP3027998B1/en not_active Not-in-force
- 2013-08-02 WO PCT/EP2013/066248 patent/WO2015014406A1/en active Application Filing
- 2013-08-02 US US14/909,681 patent/US20160178260A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
JP2016528465A (en) | 2016-09-15 |
EP3027998B1 (en) | 2017-03-22 |
US20160178260A1 (en) | 2016-06-23 |
JP6313855B2 (en) | 2018-04-18 |
WO2015014406A1 (en) | 2015-02-05 |
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