CN101245973B - Double-U type loop heat exchanger - Google Patents
Double-U type loop heat exchanger Download PDFInfo
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- CN101245973B CN101245973B CN2008101025161A CN200810102516A CN101245973B CN 101245973 B CN101245973 B CN 101245973B CN 2008101025161 A CN2008101025161 A CN 2008101025161A CN 200810102516 A CN200810102516 A CN 200810102516A CN 101245973 B CN101245973 B CN 101245973B
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Abstract
The invention relates to a dual-U shaped circuit heat exchanger used for an automobile engine wasted gas recirculation system or an engine turbocharging system. The dual-U shaped circuit heat exchanger comprises the shell of a liquid heat exchange medium and a plurality of heat exchange pipes which pass through thermal gas; the end of the heat exchange pipe is welded on a pipe plate; a front pipe plate is taken as a plug at one end of the shell and is welded on the shell; one end of the shell is welded with a flange which is connected with a thermal gas inlet pipeline and a thermal gas outlet pipeline; the other end of the shell is welded with a head; one side of the shell is provided with a water inlet and a water outlet where the liquid heat exchange medium comes in and out; the shell is internally provided with a baffle which leads the flow path of the liquid heat exchange medium to form a U-shaped path; the water inlet and the water outlet are respectively connected with a water inlet pipe and a water outlet pipe. The dual-U shaped circuit heat exchanger of the invention uses a simple baffle so as to lead the liquid heat exchange medium to form a U-shaped flow path and leads the heat exchange of the fluids to be more sufficient, effectively improves the heat exchange capability of the fluids in and outside the pipe, and greatly saves the manufacture cost.
Description
Technical field
The present invention relates to a kind of double-U type loop heat exchanger, is a kind of mechanical device that is used for internal combustion engine, is a kind of heat exchanger that is used for vehicle engine exhaust gas recirculated cooling system or engine turbine pressure charging system.
Background technology
Waste gas recirculation (EGR, Exhaust Gas Recirculation) cooling system mainly is made up of engine, cooler for recycled exhaust gas, EGR air inlet-outlet pipe and EGR valve, part waste gas in the exhaust enters gas handling system through the EGR valve, and enters cylinder after fresh air mixes and participates in burning.Introduced so promptly not that active gases (mainly being CO2) can reduce the temperature of combustion chamber again to the combustion chamber,, thereby suppressed generation and the discharging of NOx under high-temperature oxygen-enriched condition because of NOx generates.Waste gas cools off through cooler for recycled exhaust gas before entering cylinder, the temperature of cylinder in the time of can further reducing burning, thus the discharge capacity of more effective reduction NOx reduces tail gas pollution.Along with the raising day by day of global environmental regulation, improve constantly the heat exchange efficiency of cooler for recycled exhaust gas, guarantee that it is necessary that the motor vehicle emission amount reaches higher standard.
At present, engine exhaust recycle cooler common type is, arranging cross section that a kind of surface the has inwardly protruded helical groove heat exchanger tube for circular stainless steel tube in housing in order; In order to satisfy environmental regulation to the requirement of the motor vehicle exhaust emission of raising day by day, this cooler for recycled exhaust gas commonly used, its heat exchange efficiency is higher, but continues the leeway of raising the efficiency in addition, and how further improving efficiency of heat exchanger and being needs the problem that solves.
Summary of the invention
The objective of the invention is to propose a kind of double-U type loop heat exchanger, described heat exchanger is provided with the deflection plate of special shape on the glide path of liquid heat transfer medium, increased the glide path of liquid heat transfer medium, it is a kind of cooler with higher heat exchange efficiency, using this cooler neither influences engine performance, can reduce the engine emission pollutant again.
The object of the present invention is achieved like this: double-U type loop heat exchanger, comprise: the housing that contains liquid heat transfer medium, many heat exchanger tubes by hot gas are arranged in the described housing, described heat exchanger tube termination is welded on the tube sheet, described front tube sheet is welded on the housing as housing one end plug, end at housing is welded with the flange that connects the hot gas inlet and outlet piping, the other end of housing is welded with end socket, be provided with the water inlet and the delivery port of liquid heat transfer medium turnover in a side of housing, in enclosure interior the deflection plate that the glide path of impelling liquid heat transfer medium forms U type path is being installed between water inlet and the delivery port and between the part heat exchanger tube, on described water inlet and delivery port, be connected with water inlet pipe and outlet pipe respectively, described deflection plate is the L type that a big bending is arranged, the position on the nearly top of long edge joint of L type has rectangular opening, the long limit apical position of L type has a little bending, has a plurality of holes by described heat exchanger tube on the minor face of L type.
The invention has the beneficial effects as follows: overall construction design of the present invention, for satisfying the optimization design scheme of limited bulk and high performance double requirements.Characteristics of the present invention be the import and export of the import and export of hot gas and liquid heat transfer medium all at homonymy, the glide path of two media all forms the U font.The present invention uses a simple deflection plate, impel liquid heat transfer medium to form U type glide path, increased the glide path of liquid heat transfer medium, and hot-air flowing in heat exchanger tube also is to follow U type glide path, the design of this double-U type loop, compared to traditional single-pass exchanger or U-shaped pipe heat exchanger, make the heat exchange between fluid more abundant, improved the exchange capability of heat between the outer fluid in the pipe effectively.The present invention is clear and definite spiral fluted depth bounds on the heat exchanger tube, helicla flute can promote the turbulent flow of tube fluid, separates or destroys the boundary layer of fluid motion, thereby strengthened heat exchange.Owing to the outer indent design of helix tube, make flowing of extratubal fluid also have and strengthen and impel the full and uniform effect of mixing.The existence of helical groove lift angle on the heat exchanger tube of the present invention, the mobile guiding function that plays of convection cell makes the flow effect of the interior outer fluid of pipe all be further enhanced, and makes dirt suffer fierce erosion simultaneously in pipe, less scaling, reduced the maintenance cost of heat exchanger.The present invention is improving heat exchange property as starting point, and increases the difficulty of processing, and the design of heat exchanger compactness has greatly been saved manufacturing cost when improving engine performance.In cooling system for recycled exhaust gas, use this heat exchanger, can effectively reduce the discharging of auto-pollution things such as NOx.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the schematic diagram of the embodiment of the invention one described heat exchanger;
Fig. 2 is the hot gas and the liquid heat transfer medium glide path schematic diagram of the embodiment of the invention one described heat exchanger;
Fig. 3 is the end flange schematic diagram of the embodiment of the invention one described heat exchanger;
Fig. 4 is the heat exchanger schematic diagram of inventive embodiments three described use U-shaped heat exchanger tubes;
Fig. 5 is the U-shaped heat exchanger tube schematic diagram of inventive embodiments three described heat exchangers;
Fig. 6 claims the hole and imports and exports the exploded view of taking over, importing and exporting the water pipe junction for the housing of the embodiment of the invention four, five described heat exchangers;
Fig. 7 is the deflection plate schematic diagram of the embodiment of the invention six described heat exchangers;
Fig. 8 is arranged in the schematic diagram of heat exchanger for the embodiment of the invention seven described flat heat-exchanging tubes;
Fig. 9 is the schematic perspective view of the embodiment of the invention seven, eight described flat heat exchange tube;
Figure 10 is the schematic cross-sections of the embodiment of the invention seven described heat exchangers with flat heat exchange tube;
Figure 11 is the schematic cross-section of the embodiment of the invention seven described heat exchange rectangular heat exchanger tubes;
Figure 12 is the schematic cross-section of the described arc flat heat exchange tube to outer lug of the embodiment of the invention seven;
Figure 13 is the schematic cross-section of the embodiment of the invention seven described oval heat exchanger tubes;
Figure 14 is the embodiment of the invention eight described heat exchangers round screw thread groove heat exchange tube schematic diagrames;
The specific embodiment
Embodiment one:
Present embodiment is a kind of double-U type loop heat exchanger, as shown in Figure 1, 2.Wherein Fig. 1 is the stereogram of present embodiment, and Fig. 2 is the principle schematic of present embodiment.Present embodiment comprises: the housing 1 that contains liquid heat transfer medium, many heat exchanger tubes 2 by hot gas are arranged in the housing, the heat exchanger tube termination is welded on the front tube sheet, front tube sheet is welded on the housing as housing one end plug, end at housing is welded with the flange that connects the hot gas inlet and outlet piping, the other end of housing is welded with end socket 6, be provided with the water inlet and the delivery port of liquid heat transfer medium turnover in a side of housing, in enclosure interior the deflection plate 3 that the glide path of impelling liquid heat transfer medium forms U type path is installed, on water inlet and delivery port, is connected with water inlet pipe and outlet pipe respectively.
The present embodiment heat exchanger tube is straight shape heat exchanger tube, and straight shape heat exchanger tube one end is welded on the front tube sheet 4, and the other end is welded on the back tube sheet 5, and back tube sheet is welded on the housing.
Hot gas flow route in the present embodiment is shown in A arrow among Fig. 2.The parts of the turnover hot gas that front tube sheet is linked to each other with flange are divided into two parts, and half links to each other with the import of hot gas, the hot gas that acceptance enters, and second half links to each other with the outlet of hot gas, emits the gas through heat exchange.Hot gas enters the straight shape heat exchanger tube 21 of inlet from one side of front tube sheet.The other end of straight shape heat exchanger tube of entering the mouth is welded on the back tube sheet, hot gas flows out from the straight shape heat exchanger tube that enters the mouth, enter in the confined space that is combined into by back tube sheet and end socket, enter again from the straight shape heat exchanger tube 22 of outlet that back tube sheet welds with hot gases, flow out then, the other end that exports straight shape heat exchanger tube also is welded on the front tube sheet.The glide path of hot gas forms a U font like this, hot gas in the motion of U font with heat exchanger tube outside liquid heat transfer medium carry out heat exchange.
The outer liquid heat transfer medium of heat exchanger tube is filled in the enclosure space of being made up of housing, front tube sheet, back tube sheet and heat exchange tube body, and turnover is finished by water inlet and delivery port.In the present embodiment, because water inlet and delivery port are at the homonymy of housing, for increasing the length of liquid heat transfer medium glide path, at the deflection plate that has increased a L type between water inlet and the delivery port and between the part heat exchanger tube.
Liquid heat transfer medium be a kind of be the mixed solution of main component with water, therefore the import and export with liquid heat transfer medium are called water inlet and delivery port.
When liquid heat transfer medium enters the housing from water inlet, flow according to the direction of arrow B among Fig. 2, form flowing of a U font, liquid heat transfer medium is contacted with as much as possible heat exchanger tube, absorb the heat that heat exchanger tube gives out fully, realize more effective heat exchange.
Fig. 3 is the do schematic diagram of flange in the present embodiment of Fig. 1.Flange is arranged in an end of housing, the parts that the flange two ends connect, and the one, link to each other with heat exchanger, the housing of heat exchanger is welded on one side of flange; Another side is the import and export parts of hot gas, can link to each other with the corollary equipment of engine in the present embodiment, and flange links to each other with corollary equipment by through hole.Flange is connected with housing by welding, and little step 71 is arranged on the flange, plays position-limiting action when being connected with housing.In addition, there is the little chamfer design in a place 72, one the flange end, and is favourable to assembling, and the 2nd, highly beneficial to welding, make the layout of solder even, strengthen welding effect, thereby guarantee the air-tightness of gas, liquid both sides.
In addition, the end socket 6 of the other end of housing as shown in fig. 1, end socket and housing junction are straight lengths, the end socket end is enclosed within the outside of housing, by with the welding of housing, prevent that the gas side from leaking herein, the end socket arch section is connected this particular design of end socket with straight length for slick and sly transition in addition, the one, saved the space, make under the situation that guarantees the cooler length-specific, heat exchanger tube length is increased, also just increased heat exchange area accordingly; The 2nd, the arc design of end socket end makes the gas flow direction change along the shape of end socket, and resistance is not too large, and helps the reallocation of fluid.The overall construction design of cooler shown in Figure 1 is the optimization design scheme under the cooler confined space.
Embodiment two:
Present embodiment is the improvement of embodiment one, is the optimization of embodiment one.There is perpendicular shape projection the centre of the front tube sheet of the double-U type loop heat exchanger described in the embodiment one in the present embodiment.
Because coexisting, the inlet and outlet piping of hot-air connects on the flange, so propose a method that separates two pipelines at present embodiment, a perpendicular shape projection is set on front tube sheet, to enter the mouth straight shape heat exchanger tube and the straight shape heat exchanger tube two parts heat exchanger tube of outlet separately, can effectively separate the passage that passes in and out hot-air.What link to each other with flange also can be a bobbin carriage, and there is pass partition the centre, will pass in and out hot-air separately, and this moment, tube sheet did not just need to be provided with perpendicular shape projection.
Embodiment three:
Present embodiment is the improvement of embodiment one, is the optimization of embodiment one.The heat exchanger tube of the double-U type loop heat exchanger described in the embodiment one is a U type heat exchanger tube in the present embodiment, and the two ends of described U type heat exchanger tube all are welded on the tube sheet.
Present embodiment is referring to Fig. 4 and Fig. 5, and Fig. 4 is a kind of U-shaped helical groove heat exchange tube, and Fig. 5 is for using the heat exchanger of U-shaped heat exchanger tube.The difference of present embodiment and embodiment one is that heat exchanger tube is directly used U-shaped pipe 2, therefore back tube sheet need not be set, and bending part does not have rectangle opening on the deflection plate.Two mouths of pipe among Fig. 4 on the U font heat exchanger tube are welded on respectively on the through hole on the corresponding with it tube sheet, and are parallel to each other and are fixed in the housing.The pipe two ends are fixed on the same tube sheet, curved end does not add fixing, make every pipe have the leeway of freely stretching and be not subjected to the influence of other pipes and housing, the disturbance that special deflection plate can be strengthened shell-side fluid is set in the housing, the housings close end is the curved surface setting consistent with the bend pipe shape.
The design of U-shaped pipe shown in Figure 5 forces fluid to change flow direction along curved channel, further strengthened the flow condition of fluid, made the flow distribution of fluid even, the circulation distance strengthens, and increased the heat exchange area between the outer fluid in the pipe, make heat exchange efficiency be improved accordingly.The U-shaped pipe is the light section in the knee among Fig. 5, and there is helical groove in the knee among Fig. 4, and the fluid complexity of the knee fluid of helical groove layout is arranged, and mixes fully.And the heat exchanger tube of band light section is easy to process relatively.Therefore, consider, can in heat exchanger, arrange the knee band helical groove or the heat exchanger tube of light section as required, and the helical groove at straight length place also can be continuous or interrupted from processing and manufacturing and application.The heat exchanger of this application U-shaped pipe in conjunction with the design of special deflection plate, flows evenly fluid, and exchange capability of heat strengthens, and can effectively reduce the discharging of pollutants such as NOx as cooler for recycled exhaust gas, can satisfy the environmental requirement that improves day by day.
Embodiment four:
Present embodiment is the improvement of embodiment one, is the optimization of embodiment one.Being shaped as of water inlet described in the embodiment one and delivery port claimed hole 11 in the present embodiment, as shown in Figure 6.
Embodiment five:
Present embodiment is the improvement of embodiment four, is the optimization of embodiment four.Claiming of water inlet described in the embodiment four and delivery port is connected with water inlet pipe and outlet pipe respectively on the hole in the present embodiment, is connected with into water adapter and water outlet respectively and takes over 8 on described water inlet pipe and outlet pipe 9.
Fig. 6 is housing and the decomposing schematic representation of importing and exporting adapter and import and export water pipe junction.By housing and import and export adapter as can be seen in the exploded view, import and export and take over and import and export water pipe ways of connecting.From the structural design of heat exchanger, water pipe, the import and export water pipe that is made of one can be taken over and imported and exported to import and export herein.Why using this tube and tube ways of connecting, is in order to satisfy the requirement of particular space, adopts this mode to make herein more compact structure.If there is not the restriction in space, can adopt the mode of direct import and export water pipe herein fully, as shown in Figure 4.Among Fig. 6, housing with the junction of interface, claim the hole, take over an end 91 and insert and claim in the hole, and take over step place, end a little chamfering is arranged, both smear solder and leave the space for welding, play spacing effect simultaneously.The other end of taking over is a straight length 92, one end 86 of water pipe inserts in the straight length of taking over, and water pipe expansion joint 85 plays position-limiting action, leaves the space for the layout of welding filler metal simultaneously, the curved design of water pipe and the design of dimensional orientation all realize reasonably being connected with specific engine system; Wherein expansion joint 84, play position-limiting action when being connected with flexible pipe, and 83 pairs of flexible pipes of expansion joint play fixation, equally also play position-limiting action; Expansion joint on the water pipe all plays cushioning effect to the variations in temperature of cooling agent simultaneously.This special design is when satisfying space requirement, and performance requirement equally also is met.
Import and export the water pipe place and also can not take over,, directly utilize the import and export water pipe to link to each other, can save adapter with housing if the space allows, but the processing relative complex of water pipe some.Therefore, when processing and manufacturing, can weigh the advantages and disadvantages, select suitable manner.
Embodiment six:
Present embodiment is the improvement of embodiment one, is the optimization of embodiment one.Deflection plate described in the embodiment one 3 is for there being the L type of a big bending 32 in the present embodiment, the position on the nearly top of long edge joint of L type has rectangular opening 33, the long limit apical position of L type has a little bending 34, has a plurality of holes 31 by described heat exchanger tube on the minor face of L type.
Fig. 7 is the schematic diagram of the described deflection plate of present embodiment.By the particular design of Fig. 7 deflection plate, as can be seen, this deflection plate 3 not only has the effect of common deflection plate, and the one, deflection plate has supporting role to the heat exchanger tube that passes through hole 31, but can change flow direction; Owing to have bending 32, make its effect that also has longitudinal baffle simultaneously, the flow process that the application of this deflection plate will be managed outer cooling agent is divided into two journeys, and fluid flows into opposite side from the rectangle opening 33 of a side through the bending section end, makes cooling agent also form U type loop; Near the rectangle opening, little bending 34 is for processing and manufacturing, and the one, play the role of positioning, the 2nd, increase bonding area, improve weld strength.The U type loop of cooling agent is corresponding mutually with the U type loop distribution of the interior gas of pipe in the heat exchanger shown in Figure 1; The mode of this double-U type loop can make in the pipe between the outer fluid heat exchange abundant for one way fluid commonly used flows, and has strengthened the heat exchange effect, has improved heat exchange efficiency.The inside and outside fluid of pipe is that following current is arranged substantially, because the EGT of engine is generally higher, the inlet of waste gas and the inlet of cooling agent is arranged in same end, makes the wall temperature at place, gas access be unlikely to too high, can prolong the service life of cooler.
Embodiment seven:
Present embodiment is the improvement of embodiment one, is the optimization of embodiment one.The cross section of the heat exchanger tube described in the embodiment one is made of two relative minor faces long limit relative with two in the present embodiment, wherein, described minor face is camber line or the straight line that protrudes from inside to outside, and described long limit also is camber line or the straight line that protrudes from inside to outside, the slick and sly connection between long limit and the minor face.
Referring to Fig. 8 and Fig. 9, Fig. 8 is flat-shaped heat exchanger tube for cross sectional shape, and Fig. 9 is for using the heat exchanger of flat-shaped heat exchanger tube.Arrange the efficient height of flat heat exchange tube efficient in the cooler for recycled exhaust gas, but flow resistance is bigger than pipe, therefore weighs the advantages and disadvantages, carry out selection the pipe section shape than round heat exchanger tube.Flat heat exchange tube not only increases to some extent than the heat exchange area of circle heat exchanger tube, and the disturbance of tube fluid is played the effect of reinforcement.Because flat heat exchange tube is not centrosymmetric shape with respect to the circle heat exchanger tube, the geometric center of flat heat exchange tube is littler than the distance of circular heat exchanger tube and tube wall with the distance of tube wall, most of fluid in the pipe can participate in heat exchange, and the shape of flat heat exchange tube makes the disturbance of fluid strengthen, the heat exchange effect strengthens, thereby wanting of the temperature of tube fluid decline is fast.
Moreover, flat heat exchange tube is with respect to the circle heat exchanger tube, different arrangement modes can produce different effects, so can have multiplely on the mode of arranging, heat exchanger tube in-line arrangement, wrong row or in-line arrangement and wrong row use simultaneously, representative a kind of arrangement mode wherein just among Fig. 8, other modes are not listed one by one, the effect difference that different arrangement modes makes the outer flow of coolant generation disturbance of pipe, thereby the heat exchange of outer fluid in can reinforced pipe, the heat exchange efficiency of enhancing heat exchanger.
Figure 10 is a kind of schematic cross-section of flat heat exchange tube, two relative minor faces 24 are curved projection from inside to outside, and be connected for the circular arc transition with long limit 23, such setting makes full use of the surface of heat exchanger tube and realizes the heat exchange of maximal efficiency, and is easy to production and processing.
Figure 11 is that a kind of cross sectional shape is the heat exchanger tube of rectangle, and connects for arc transition between the adjacent both sides.Remainder is identical with flat heat-exchanging tube.Production and processing is convenient in such structure setting.
Shown in Figure 12 is heat exchanger tube cross sectional shape is on the basis of flat heat-exchanging tube, and two relative long limits are set to be the arc of projection from inside to outside, and the arc surface of curved projection from inside to outside all is arranged on four surfaces that are about to the stainless steel heat exchanger tube; The arc radius on long limit is far longer than the radius of minor face, can avoid long limit the phenomenon on surface " subsiding " to occur like this; Remainder is identical with flat heat-exchanging tube.
The cross sectional shape of heat exchanger tube shown in Figure 13 is oval.The ratio of oval-shaped major axis and minor axis is less than 4, and remainder is identical with flat heat-exchanging tube.
Embodiment eight:
Present embodiment is the improvement of embodiment one, is the optimization of embodiment one.Heat exchanger tube described in the embodiment one is the stainless steel tube that outer surface has helical groove in the present embodiment, described helical groove is to be provided with continuously or interrupted the setting, the lead angle of described helical groove is between the 8-75 degree, and the slot cross-section of described helical groove is V-arrangement or circular arc.
As shown in figure 14, be a kind of round heat exchanger tube that has helical groove 21, this heat exchanger tube can reach certain heat exchange effect by changing grooved, lead angle and groove depth.
Shown in Figure 9 be to have helical groove platypelloid type heat exchanger tube, this heat exchanger tube body is the stainless steel body, is distributed with the helical groove 21 of ecto-entad projection on the body of heat exchanger tube; This helical groove can be one, also can be many settings; This helical groove is to be provided with continuously along body, also can be provided with for section is continuous.Groove lead angle 22 is between 8～75 degree;
Embodiment nine:
Present embodiment is the improvement of embodiment eight, is the optimization of embodiment eight.The degree of depth of the helical groove of the heat exchanger tube described in the embodiment eight is the 0.3-2 millimeter in the present embodiment.
The degree of depth of groove 21 is not less than 0.3mm.When waste gas passes through this heat exchanger tube, run into the inhibition at spiral salient position, flow direction changes, produce complicated secondary stream vortex flow, simultaneously also formed vortex, increased the turbulivity of waste gas, especially increased disturbance the near wall region boundary layer in the back of spiral salient, destroy or attenuate the boundary layer of fluid, thereby strengthened heat exchange; Simultaneously, the enhancing of flow disturbance makes critical Reynolds number reduce, and promptly takes place ahead of time from the transformation of laminar flow to turbulent flow, and strong turbulent motion makes dirt suffer fierce erosion in pipe, and is less scaling, the convenient cleaning.
Below just shown several modular design form of the present invention, wherein about length, number and the heat exchanger tube of heat exchanger tube in housing arrangement mode and the shape and the cooling agent import and export order of housing can revise.The application of double-U type loop heat exchanger, make flowing of outer fluid in managing all played a driving role, improved the heat exchange effect of heat exchanger, reduce the temperature of engine combustion, thereby improve the discharge performance index of automobile engine, satisfy the emission request of the environmental regulation of increasingly stringent.
It should be noted last that, below only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to the preferred arrangement scheme, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention (such as number of the cross sectional shape of the profile of housing, heat exchanger tube, described continuous or interrupted groove etc.), and not break away from the spirit and scope of technical solution of the present invention.
Claims (9)
1. double-U type loop heat exchanger, comprise: the housing that contains liquid heat transfer medium, many heat exchanger tubes by hot gas are arranged in the described housing, described heat exchanger tube termination is welded on the tube sheet, front tube sheet is welded on the housing as housing one end plug, end at housing is welded with the flange that connects the hot gas inlet and outlet piping, the other end of housing is welded with end socket, be provided with the water inlet and the delivery port of liquid heat transfer medium turnover in a side of housing, it is characterized in that, in enclosure interior the deflection plate that the glide path of impelling liquid heat transfer medium forms U type path is being installed between water inlet and the delivery port and between the part heat exchanger tube, on described water inlet and delivery port, be connected with water inlet pipe and outlet pipe respectively, described deflection plate is the L type that a big bending is arranged, the position on the nearly top of long edge joint of L type has rectangular opening, the long limit apical position of L type has a little bending, has a plurality of holes by described heat exchanger tube on the minor face of L type.
2. double-U type loop heat exchanger according to claim 1, it is characterized in that described heat exchanger tube is straight shape heat exchanger tube, described straight shape heat exchanger tube one end is welded on the front tube sheet, the other end of straight shape heat exchanger tube is welded on the back tube sheet, and described back tube sheet is welded on the housing.
3. double-U type loop heat exchanger according to claim 2 is characterized in that, there is perpendicular shape projection the centre of described front tube sheet.
4. double-U type loop heat exchanger according to claim 1 is characterized in that, described heat exchanger tube is a U type heat exchanger tube, and the two ends of described U type heat exchanger tube all are welded on the tube sheet.
5. double-U type loop heat exchanger according to claim 1 is characterized in that, the hole is claimed in being shaped as of described water inlet and delivery port.
6. double-U type loop heat exchanger according to claim 5 is characterized in that, claiming of described water inlet and delivery port is connected with water inlet pipe and outlet pipe respectively on the hole, is connected with into water adapter and water outlet respectively and takes on described water inlet pipe and outlet pipe.
7. double-U type loop heat exchanger according to claim 1, it is characterized in that, the cross section of described heat exchanger tube is made of two relative minor faces long limit relative with two, wherein, described minor face is camber line or the straight line that protrudes from inside to outside, described long limit also is camber line or the straight line that protrudes from inside to outside, the slick and sly connection between long limit and the minor face.
8. double-U type loop heat exchanger according to claim 1, it is characterized in that, described heat exchanger tube is the stainless steel tube that outer surface has helical groove, described helical groove is to be provided with continuously or interrupted the setting, the lead angle of described helical groove is between the 8-75 degree, the slot cross-section V-arrangement or the circular arc of described helical groove.
9. double-U type loop heat exchanger according to claim 8 is characterized in that, the degree of depth of described helical groove is the 0.3-2 millimeter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101025161A CN101245973B (en) | 2008-03-21 | 2008-03-21 | Double-U type loop heat exchanger |
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| CN2008101025161A CN101245973B (en) | 2008-03-21 | 2008-03-21 | Double-U type loop heat exchanger |
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| CN101245973B true CN101245973B (en) | 2010-08-18 |
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| JP5903444B2 (en) * | 2011-12-22 | 2016-04-13 | 株式会社Ｕａｃｊ銅管 | Heat exchanger manufacturing method and heat exchanger obtained thereby |
| CN105466256A (en) * | 2015-12-25 | 2016-04-06 | 无锡方盛换热器股份有限公司 | Twin type oil-water cooler |
| CN105486122B (en) * | 2016-02-03 | 2019-02-12 | 浙江广涛卫厨有限公司 | A kind of condensation secondary heat exchanger |
| KR101676993B1 (en) * | 2016-05-03 | 2016-11-16 | (주)귀뚜라미 | U-bend pipe type heat exchanger |
| CN107091578A (en) * | 2017-04-28 | 2017-08-25 | 哈尔滨汽轮机厂辅机工程有限公司 | A kind of large-scale rectangular condenser of aixal admission |
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