CN106939853A - Evaporator for engines exhaust gas recirculation - Google Patents
Evaporator for engines exhaust gas recirculation Download PDFInfo
- Publication number
- CN106939853A CN106939853A CN201710320283.1A CN201710320283A CN106939853A CN 106939853 A CN106939853 A CN 106939853A CN 201710320283 A CN201710320283 A CN 201710320283A CN 106939853 A CN106939853 A CN 106939853A
- Authority
- CN
- China
- Prior art keywords
- mainboard
- refrigerant
- exhaust gas
- waste gas
- gas recirculation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 47
- 239000007789 gas Substances 0.000 claims abstract description 36
- 239000002912 waste gas Substances 0.000 claims abstract description 31
- 238000001704 evaporation Methods 0.000 claims description 13
- 230000008020 evaporation Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims 1
- 239000002918 waste heat Substances 0.000 abstract description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000011109 contamination Methods 0.000 abstract 1
- 210000003041 ligament Anatomy 0.000 abstract 1
- 231100000614 poison Toxicity 0.000 abstract 1
- 238000000197 pyrolysis Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract 1
- 239000010935 stainless steel Substances 0.000 abstract 1
- 239000003440 toxic substance Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- JEVCWSUVFOYBFI-UHFFFAOYSA-N cyanyl Chemical compound N#[C] JEVCWSUVFOYBFI-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N glycolonitrile Natural products N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229960002050 hydrofluoric acid Drugs 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Abstract
It is especially next that waste gas recirculation evaporator integrated on ORC system is used on behalf of the engine for realizing carbon emission target the invention belongs to engine waste heat recycling field.The present invention avoids the problem of similar refrigerant medium such as R245fa is leaked into engine EGR gas using double-layer flat tubular construction；Such refrigerant is blended in engine cylinder after high-temp combustion with waste gas to produce hypertoxicity material because of pyrolysis and combustion reaction etc..The present invention uses plate fin type heat exchanger structure type and stainless steel welding, and exploitation is a kind of can be avoided waste gas and refrigerant medium to mix completely and carry out the waste gas evaporator of heat transfer.In product running, if waste gas or coolant leakage, it can be detected by double-layer flat ligament passage and sensor, disable and change to solve product failure and cause coolant leakage into engine EGR gas in time, burning is participated in cylinder and produces the extremely toxic substances, the risk of severe contamination air such as hydrofluoric acid.
Description
Technical field
This patent is related to a kind of waste gas recirculation evaporator reclaimed for engine waste heat, belongs to Waste Heat Recovery and Re Jiao
Exchanger art.
Background technology
Road vehicle Abgasgesetz is more strict, and higher requirement and standard are proposed to engine consumption.And engine
Energy utilization efficiency is low, and nearly 60% heat scatters and disappears in a variety of manners, wherein maximum with engine exhaust used heat proportion.By
This, the Waste Heat Recovery technology by representative of Rankine cycle turns into one of important means of reduction vehicle carbon emission.It passes through refrigerant
Absorb the heat of waste gas and EGR gas and Effective power is exported by expanding machine, indirectly lifting Fuel Economy and drop
Low CO2 discharge.
In engines exhaust gas recirculation evaporator, (as tradition EGR is cold while refrigerant medium reduction EGR gas temperature
But device), waste-gas heat is absorbed, the conversion and utilization of used heat is realized.In heat exchanging process, if there is product failure, cause cold
Matchmaker is leaked into EGR gas, and enters burning in engine chamber therewith；In combustion process, refrigerant (such as R245fa)
It can react because of Pintsch process and with air, produce the hypertoxicity materials such as cyanogen fluoric acid and be discharged into air, heavy damage and pollution are big
Gas；It is to design one of key point of engines exhaust gas recirculation evaporator to avoid the problem.
The content of the invention
It is an object of the invention to provide a kind of evaporator for engines exhaust gas recirculation, pass through flat tube double-decker
Whether the gap detection waste gas of generation leaks with refrigerant, so as to avoid once occurring product failure problem, coolant leakage to following again
In ring waste gas.
The object of the present invention is achieved like this：A kind of evaporator for engines exhaust gas recirculation, including housing, shell
Fuse is set in vivo, and fuse includes spaced flat tube, and fuse two ends are fixed with mainboard, and flat tube is internally formed waste gas and led to
Refrigerant passage is formed between road, flat tube, exhaust steam passage and refrigerant passage are mutually isolated；Refrigerant passage is communicated with housing
Refrigerant inlet joint and refrigerant exit joint, housing two ends are communicated with the gas inlet room interface and waste gas outlet of exhaust steam passage
Room interface, the flat tube is double-decker, including inner tube and outer tube have gap and shape between inner tube and outer tube
Into sense channel, the detection tabs of sense channel are communicated with the mainboard.
It is preferred that, the flat tube is built-in with turbulent piece.
It is preferred that, fin is provided between the flat tube.
It is preferred that, thermal insulation board is had additional at the air inlet of the exhaust steam passage, thermal insulation board is located on the inside of mainboard.
It is preferred that, the air inlet of the flat tube is fixed with bushing pipe, and bushing pipe afterbody is consolidated with flat inside pipe wall or turbulent piece
Fixed, gap is left in front end with flat tube.
It is preferred that, the mainboard includes mainboard one, mainboard two and secondary mainboard, and secondary mainboard is located at most inner side and for isolating phase
Adjacent flat tube, mainboard one stretches out for connecting inlet plenum；Mainboard two is located between mainboard one and secondary mainboard, mainboard two with it is outer
Layer pipe is fixed, and mainboard one is fixed with inner tube, forms mainboard gap between mainboard one and mainboard two, mainboard gap and inner tube and
Gap connection between outer tube, the detection tabs are connected with mainboard gap.
It is preferred that, dividing plate or ring flange are provided with the middle part of the refrigerant passage, and refrigerant passage is separated into independent empty
Between preheating zone and evaporation overheated zone, evaporation overheated zone be located at exhaust gas entrance side, preheating zone be located at waste gas outlet side, evaporation overheat
The flow direction of refrigerant and waste gas is in down current arrangement in area, and the flow direction of preheating zone and waste gas is in counter-flow arrangement.
It is preferred that, the evaporation overheated zone near refrigerant inlet be provided with deflection plate, the vertical refrigerant flow direction of deflection plate,
And interval is dislocatedly distributed each other.
It is preferred that, gas inlet room interface includes inlet flange, bellows, instlated tubular, inlet plenum, and bellows is arranged
On instlated tubular, inlet flange is arranged on instlated tubular one end, and inlet plenum is arranged on the instlated tubular other end, bellows and inlet flange
Welding, other end free wxpansion.
The present invention is prominent and beneficial compared with prior art to be had the technical effect that：
1st, plate fin type heat exchanger structure is used in structure type of the present invention, by mainboard and flat tube by waste gas and refrigerant
Working medium is kept apart.Cycle gas are as thermal source in flat tube internal flow, and refrigerant is in flat tube flows outside energy absorption.It is flat
Flat pipe use double-deck Manifold technology mainly for avoid product fail in extreme circumstances or lifetime in failure cause refrigerant
Into in cycle of engine waste gas；Judge whether to produce leakage using sense channel, once leakage disables and changes product in time.
2nd, to improve exhaust gas side and medium side heat transfer, this patent uses plate-fin structure form, respectively between flat tube
Fin is inserted, to improve both side surface heat transfer coefficient and enhancing heat transfer area.
3rd, described for protection this patent at evaporator exhaust gas inlet end, mainboard produces heat with flat tube soldering point because of high temperature
Deformation or big thermal stress and cause product failure, this patent is mainly from the connection between three aspect reduction mainboards one and interior flat tube
The temperature and thermal stress at place：Highly dense fin etc. is inserted between mainboard one and mainboard two and strengthens the metal structure of heat exchange, built in flat tube
Bushing pipe, increase thermal insulation board etc..
4th, in refrigerant medium side, region is divided into preheating zone and evaporation overheated zone with central dividing plate or flange.Refrigerant is with giving up
Gas evaporation superheat region is in down current arrangement, and preheating zone is in counter-flow arrangement.Refrigerant flow chamber is respectively kept with central dividing plate both sides
Required space, improves refrigerant distribution flow uniformity.
5th, further to reduce cycle gas side because high-temperature heating is deformed, the bellows connected at waste gas side-entrance, one
End is welded with suction flange, other end free wxpansion, it is to avoid bellows directly contacts with high-temp waste gas and produces fatigue rupture.
Brief description of the drawings
Fig. 1 is the double-decker figure of flat tube of the present invention；
Fig. 2 is the structure chart and local detailed annotation figure of fuse of the present invention；
Fig. 3 is the structural representation that flange of the present invention connects fuse；
Fig. 4 is the flow graph of evaporator waste gas of the present invention and refrigerant；
Fig. 5 is the structure decomposition figure of evaporator of the present invention；
Fig. 6 is the structural representation of gas inlet room of the present invention interface.
Reference：1st, flat tube；1a, outer tube；1b, inner tube；2nd, sense channel；3rd, mainboard one；4th, mainboard two, 5,
Secondary mainboard；6th, fin；7th, thermal insulation board；8th, bushing pipe；9th, turbulent piece；10th, deflection plate；11st, dividing plate；12nd, detection tabs；13rd, flange
Disk；14th, pad；15th, inlet flange；16th, bellows；17th, inlet plenum；18th, housing；19th, refrigerant exit joint；20th, refrigerant enters
Mouth joint；21st, gas inlet room interface；22nd, waste gas discharge chamber interface；23rd, fin；24th, discharge chamber；25th, outlet flange；26、
Instlated tubular.
Embodiment
With specific embodiment, the invention will be further described below in conjunction with the accompanying drawings, referring to Fig. 1-6：
A kind of evaporator for engines exhaust gas recirculation, with reference to Fig. 4 and Fig. 5, including housing 18, core is set in housing 18
Son, fuse includes spaced flat tube 1, and fuse two ends are fixed with mainboard, and flat tube 1 is internally formed exhaust steam passage, flat
Refrigerant passage is formed between pipe 1, exhaust steam passage and refrigerant passage are mutually isolated by mainboard and flat tube 1；Housing 18 is provided with company
The refrigerant inlet joint 20 and refrigerant exit joint 19 of logical refrigerant passage, the waste gas that the two ends of housing 18 are communicated with exhaust steam passage enter
Air chamber interface 21 and waste gas discharge chamber interface 22；As shown in figure 1, the flat tube 1 is double-decker, including inner tube 1b and outer
Layer pipe 1a, has gap and forms sense channel 2 between inner tube 1b and outer tube 1a, outer tube 1a and inner tube 1b in figure
Fillet at ensure that certain interval avoids soldering, it is ensured that sense channel 2 be in circulation status；With reference to Fig. 3, the mainboard is provided with company
The detection tabs 12 of logical sense channel 2.
Specific to see Fig. 2 and Fig. 3, the mainboard includes mainboard 1, mainboard 24 and secondary mainboard 5, and secondary mainboard 5 is located at most inner side
And for isolating adjacent flat pipe 1, mainboard 1 stretches out for connecting inlet plenum 17；Mainboard 24 is located at mainboard 1 and pair
Between mainboard 5, mainboard 24 is fixed with outer tube 1a, and mainboard 1 is fixed with inner tube 1b, shape between mainboard 1 and mainboard 24
Into mainboard gap, fin 6 is set in mainboard gap, the gap between mainboard gap and inner tube 1b and outer tube 1a is connected, institute
State detection tabs 12 to be arranged on mainboard 24, and connected with mainboard gap.
Wherein, dividing plate 11 (Fig. 2) or ring flange 13 (Fig. 3) are provided with the middle part of refrigerant passage, and refrigerant passage is separated into tool
There are preheating zone and evaporation overheated zone (as shown in Figure 4) of separate space, evaporation overheated zone is located at exhaust gas entrance side, and preheating zone is located at
The flow direction of refrigerant and waste gas is in down current arrangement in waste gas outlet side, evaporation overheated zone, and the flow direction of preheating zone and waste gas is in adverse current cloth
Put.Using the structure of ring flange 13, then fuse is divided into two, is connected by ring flange 13, pad 14 and bolt assembly, remaining structure
It is similar with the structure of dividing plate 11.
Fig. 2 specifically is seen, the flat tube 1 is built-in with turbulent piece 9；Fin 23 is provided between the flat tube 1.Flat tube 1
Air inlet be fixed with bushing pipe 8, the afterbody of bushing pipe 8 is fixed with the inwall of flat tube 1 or turbulent piece 9, between front end and flat tube 1 leave
Gap.Thermal insulation board 7 is had additional at the air inlet of the exhaust steam passage, thermal insulation board 7 is located on the inside of mainboard.
As shown in figure 5, the evaporation overheated zone is provided with deflection plate 10, the vertical refrigerant stream of deflection plate 10 near refrigerant inlet
Dynamic direction, and interval is dislocatedly distributed each other.
As shown in fig. 6, the interface of gas inlet room 17 includes inlet flange 15, bellows 16, instlated tubular 26, inlet plenum
17, bellows 16 is set on instlated tubular 26, and inlet flange 15 is arranged on the one end of instlated tubular 26, and inlet plenum 17 is arranged on instlated tubular
26 other ends, bellows 16 is welded with inlet flange 15, other end free wxpansion.
Above-described embodiment is only presently preferred embodiments of the present invention, is not limited the scope of the invention according to this, therefore：It is all according to
The equivalence changes that the structure of the present invention, shape, principle are done, all should be covered by within protection scope of the present invention.
Claims (10)
1. setting fuse in a kind of evaporator for engines exhaust gas recirculation, including housing (18), housing (18), fuse includes
Spaced flat tube (1), fuse two ends are fixed with mainboard, and flat tube (1) is internally formed exhaust steam passage, flat tube (1) it
Between form refrigerant passage, exhaust steam passage and refrigerant passage are mutually isolated；The refrigerant that refrigerant passage is communicated with housing (18) enters
Mouth joint (20) and refrigerant exit joint (19), housing (18) two ends are communicated with the gas inlet room interface (21) of exhaust steam passage
With waste gas discharge chamber interface (22), it is characterised in that：The flat tube (1) is double-decker, including inner tube (1b) and outer layer
Manage (1a), be communicated between inner tube (1b) and outer tube (1a) with gap and being formed on sense channel (2), the mainboard
The detection tabs (12) of sense channel (2).
2. the evaporator according to claim 1 for engines exhaust gas recirculation, it is characterised in that：The flat tube
(1) it is built-in with turbulent piece (9).
3. the evaporator according to claim 1 for engines exhaust gas recirculation, it is characterised in that：The flat tube
(1) fin (23) is provided between.
4. the evaporator according to claim 1 for engines exhaust gas recirculation, it is characterised in that：The exhaust steam passage
Air inlet at have additional thermal insulation board (7), thermal insulation board (7) is located on the inside of mainboard.
5. the evaporator according to claim 2 for engines exhaust gas recirculation, it is characterised in that：The flat tube
(1) air inlet is fixed with bushing pipe (8), and bushing pipe (8) afterbody and flat tube (1) inwall or turbulent piece (9) are fixed, front end with it is flat
Flat pipe (1) leaves gap.
6. the evaporator according to claim 1 for engines exhaust gas recirculation, it is characterised in that：The mainboard includes
Mainboard one (3), mainboard two (4) and secondary mainboard (5), secondary mainboard (5) are located at most inner side and for isolating adjacent flat pipe (1), main
Plate one (3) stretches out for connecting inlet plenum (17)；Mainboard two (4) is located between mainboard one (3) and secondary mainboard (5), mainboard
Two (4) are fixed with outer tube (1a), and mainboard one (3) is fixed with inner tube (1b), formed between mainboard one (3) and mainboard two (4)
Mainboard gap, the gap between mainboard gap and inner tube (1b) and outer tube (1a) is connected, the detection tabs (12) and master
Sheet separation is connected.
7. the evaporator according to claim 6 for engines exhaust gas recirculation, it is characterised in that：The mainboard gap
It is built into fin (6).
8. the evaporator according to claim 1 for engines exhaust gas recirculation, it is characterised in that：The refrigerant passage
Middle part is provided with dividing plate (11) or ring flange (13), and refrigerant passage is separated into the preheating zone with separate space and overheat is evaporated
Area, evaporation overheated zone is located at exhaust gas entrance side, and preheating zone is located at the flow direction of refrigerant and waste gas in waste gas outlet side, evaporation overheated zone
In down current arrangement, the flow direction of preheating zone and waste gas is in counter-flow arrangement.
9. the evaporator according to claim 8 for engines exhaust gas recirculation, it is characterised in that：The evaporation overheat
Area is provided with deflection plate (10), the vertical refrigerant flow direction of deflection plate (10) near refrigerant inlet, and is spaced each other wrong
Bit distribution.
10. the evaporator according to claim 1 for engines exhaust gas recirculation, it is characterised in that：The waste gas enters
Air chamber interface (21) includes inlet flange (15), bellows (16), instlated tubular (26), inlet plenum (17), and bellows (16) is arranged
On instlated tubular (26), inlet flange (15) is arranged on instlated tubular (26) one end, and it is another that inlet plenum (17) is arranged on instlated tubular (26)
One end, bellows (16) is welded with inlet flange (15), other end free wxpansion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710320283.1A CN106939853A (en) | 2017-05-09 | 2017-05-09 | Evaporator for engines exhaust gas recirculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710320283.1A CN106939853A (en) | 2017-05-09 | 2017-05-09 | Evaporator for engines exhaust gas recirculation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106939853A true CN106939853A (en) | 2017-07-11 |
Family
ID=59463354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710320283.1A Pending CN106939853A (en) | 2017-05-09 | 2017-05-09 | Evaporator for engines exhaust gas recirculation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106939853A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810323A (en) * | 2020-06-30 | 2020-10-23 | 东风马勒热系统有限公司 | Exhaust gas recirculation cooler |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1378638A (en) * | 1999-07-22 | 2002-11-06 | 施皮罗研究公司 | Method for manufacturing double-walled heat exchanging tube with leak detection and said heat exchanging tube |
| CN101021393A (en) * | 2006-02-15 | 2007-08-22 | 日立电线株式会社 | Heat transfer tube and heat exchanger using same |
| US20080223024A1 (en) * | 2005-08-27 | 2008-09-18 | Behr Gmbh & Co. Kg | Exhaust Gas Heat Exchanger |
| CN105247315A (en) * | 2013-05-24 | 2016-01-13 | 株式会社电装 | Refrigerant evaporator |
| CN105422328A (en) * | 2015-12-04 | 2016-03-23 | 浙江银轮机械股份有限公司 | Evaporator for engine exhaust gas recirculation (EGR) |
| CN105698443A (en) * | 2016-03-16 | 2016-06-22 | 浙江银轮机械股份有限公司 | Boiling evaporator used for exhaust gas recirculation of engine |
| CN206668431U (en) * | 2017-05-09 | 2017-11-24 | 浙江银轮机械股份有限公司 | Evaporator for engines exhaust gas recirculation |
-
2017
- 2017-05-09 CN CN201710320283.1A patent/CN106939853A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1378638A (en) * | 1999-07-22 | 2002-11-06 | 施皮罗研究公司 | Method for manufacturing double-walled heat exchanging tube with leak detection and said heat exchanging tube |
| US20080223024A1 (en) * | 2005-08-27 | 2008-09-18 | Behr Gmbh & Co. Kg | Exhaust Gas Heat Exchanger |
| CN101021393A (en) * | 2006-02-15 | 2007-08-22 | 日立电线株式会社 | Heat transfer tube and heat exchanger using same |
| CN105247315A (en) * | 2013-05-24 | 2016-01-13 | 株式会社电装 | Refrigerant evaporator |
| CN105422328A (en) * | 2015-12-04 | 2016-03-23 | 浙江银轮机械股份有限公司 | Evaporator for engine exhaust gas recirculation (EGR) |
| CN105698443A (en) * | 2016-03-16 | 2016-06-22 | 浙江银轮机械股份有限公司 | Boiling evaporator used for exhaust gas recirculation of engine |
| CN206668431U (en) * | 2017-05-09 | 2017-11-24 | 浙江银轮机械股份有限公司 | Evaporator for engines exhaust gas recirculation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810323A (en) * | 2020-06-30 | 2020-10-23 | 东风马勒热系统有限公司 | Exhaust gas recirculation cooler |
| CN111810323B (en) * | 2020-06-30 | 2022-05-31 | 东风马勒热系统有限公司 | Exhaust gas recirculation cooler |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170711 |
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| RJ01 | Rejection of invention patent application after publication |