CN101013008A

CN101013008A - Heat exchanger

Info

Publication number: CN101013008A
Application number: CNA2007100067088A
Authority: CN
Inventors: 大船悠; 林孝幸
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2006-02-03
Filing date: 2007-02-02
Publication date: 2007-08-08
Anticipated expiration: 2027-02-02
Also published as: DE102007005370A1; FR2902507A1; JP2007232355A; US20070193732A1; CN101013008B; JP5145718B2

Abstract

A heat exchanger has tubes defining first fluid passages through which a first fluid flows therein, an inlet part and an outlet part. Each tube has a first main wall and a second main wall. At least one of the first main wall and the second main wall has a projection projecting outside of the tube along a peripheral end and a first recess and a second recess recessed from the projection. The tubes are stacked such that the first and second main walls are opposed to each other and spaces are provided between the adjacent tubes by the projections. The spaces define second fluid passages through which a second fluid flows. The inlet part is in communication with the second fluid passages through the first recesses and the outlet part is in communication with the second fluid passages through the second recesses.

Description

Heat exchanger

Technical field

The present invention relates to a kind of heat exchanger, described heat exchanger for example uses and is being used for carrying out the discharge gas recirculation system (EGR) of discharging the heat exchange between gas and the cooling water.

Background technology

Japan not substantive examination patent disclosure No.2003-106790 (US6,595,274B2) disclosed a kind of discharge gas heat-exchanger that for example in discharging gas recirculation system, uses.Discharge gas heat-exchanger and carry out a part of discharging gas and the heat exchange between the cooling water, the air inlet side of engine is discharged and turned back to the part of wherein said discharge gas from engine, and gas is discharged in cooling thus.

In discharging gas heat-exchanger, stacked tube is housed in the case, and lid (bonnets) is connected to vertical end of case.In addition, central layer (core plates) is arranged on vertical end of case, thereby the space of the inner space that makes case and valve gap separates.Vertical end of pipe inserts in the hole of central layer.In addition, thus cooling water inlet pipe and cooling water outlet pipe are connected to the space that limits in case and the case to be communicated with.

The cooling water that enters from the cooling water inlet pipe flows through the space (aquaporin) in the outside that is limited to the pipe in the case, and flows out case from cooling water outlet pipe.On the other hand, discharge gas and be imported into the gas passage that is limited to the pipe inboard from one of lid.Discharge gas is collected in another lid and is discharged to turn back to engine.Thereby, discharge the gas water cooling that when flowing through pipe, is cooled.

In discharging gas exchanger, central layer is configured to stay pipe, is set between the adjacent tubes for use in the space of aquaporin.That is, central layer will be helpless to heat exchange performance.In making the discharge gas heat-exchanger, vertical end of pipe must be inserted in the hole of central layer.Thereby step increases in manufacture process, causes having increased manufacturing cost.

Summary of the invention

Consider that the problems referred to above make the present invention, and the purpose of this invention is to provide a kind of heat exchanger, this heat exchanger has the structure that can provide the space between adjacent tubes and not use central layer (coreplate).

According to an aspect of the present invention, heat exchanger has a plurality of pipes, inlet portion and export department.Each pipe all limits the first fluid passage therein, and first fluid flows through the first fluid passage.Each pipe all has the first main wall and the second main wall, and in the first main wall and the second main wall at least one have protrusion, and described protrusion is projected into the outside of pipe and along the peripheral end of described pipe.On first recess and second recess are formed on and protrude, in the pre-position.Pipe is stacked, so that the first main wall and the second main wall are toward each other, and the space is set between the adjacent tubes by protrusion.Space boundary flows through second fluid passage of second fluid.In addition, first opening is limited by first recess, and second opening is limited by second recess.Inlet portion is arranged to and first open communication, so that second fluid is imported in second fluid passage.Export department is arranged to and second open communication, so that second fluid is discharged from second fluid passage.

In this structure, the space that is used for second fluid passage is set between the adjacent pipe by protrusion, and does not use central layer.Therefore, the step of making heat exchanger reduces.

Inlet portion for example is made of intake section and distribution portion, and wherein said intake section is used to guide second fluid, and described distribution portion is used for stream is dispensed into second fluid passage from second fluid of intake section.Export department for example constitutes by collecting part and exit portion, and the wherein said part of collecting is used to collect second fluid through second fluid passage, and described exit portion is used for partly discharging second fluid from collecting.

Description of drawings

Other purpose of the present invention, feature and advantage will become clearer from following detailed description with reference to the accompanying drawings, same parts is represented by identical Reference numeral in the accompanying drawings, wherein:

Fig. 1 is the schematic plan view according to the EGR gas cooler of first embodiment of the invention;

Fig. 2 is the schematic side elevation according to the EGR gas cooler of first embodiment;

Fig. 3 is when the arrow A in Fig. 21 is observed, the schematic side elevation of EGR gas cooler;

Fig. 4 is the decomposition diagram according to the EGR gas cooler of first embodiment;

Fig. 5 A is the vertical view according to the pipe of the EGR gas cooler of first embodiment;

Fig. 5 B is the side view according to the pipe of first embodiment;

Fig. 5 C is the upward view according to the pipe of first embodiment;

Fig. 6 is the schematic cross-sectional view of conduct according to the part of the pipe of the example of first embodiment;

Fig. 7 is the schematic cross-sectional view of conduct according to the part of the pipe of another example of first embodiment;

Fig. 8 is the schematic side elevation according to a pile pipe of the EGR gas cooler of first embodiment;

Fig. 9 is the schematic cross-sectional view along the EGR gas cooler of the line IX-IX intercepting of Fig. 1;

Figure 10 is the viewgraph of cross-section along the EGR gas cooler of the intercepting of the line X-X among Fig. 2;

Figure 11 is according to first box part of the EGR gas cooler of first embodiment and the schematic cross-sectional view of the coupling part between second box part;

Figure 12 is the schematic cross-sectional view along the EGR gas cooler of the intercepting of the line XII-XII among Fig. 9; With

Figure 13 is the schematic cross-sectional view of GER gas cooler according to a second embodiment of the present invention.

The specific embodiment

To Figure 12 first embodiment is described with reference to Fig. 1.Heat exchanger shown in Fig. 1 for example is used as the EGR gas cooler, and it is used for the discharge gas recirculation system (EGR) of diesel engine.

To as shown in Fig. 4, EGR gas cooler 100 is carried out the discharge gas (first fluid) of the engine that will turn back to vehicle and the heat exchange between the engine cooling water (second fluid) as Fig. 1, and gas is discharged in cooling thus.In the accompanying drawings, arrow C W represents cooling-water flow, and arrow E G represents to discharge gas flow.

The parts of EGR gas cooler 100 are by making such as stainless material with sufficient intensity and enough corrosion resistancies.Each parts is by such as brazing or be welded to connect.

EGR gas cooler 100 has a pile pipe 110, water tank 130, first gas cabinet 151 and second gas cabinet 152.As shown in Fig. 5 A to 9, each pipe 110 all has the general flat tube shape, and wherein limits gas passage (first fluid passage) 114, discharges gas and flows through described gas passage 114.Pipe 110 cross sections with essentially rectangular shape.

For example, each pipe 110 all is made of first tube sheet (first duct member) 110a and second tube sheet (second duct member) 110b.All U-shaped cross-section forms among the first tube sheet 110a and the second tube sheet 110b each by having roughly such as compacting or rolling from the flat parts.Particularly,

tube sheet

110a, 110b have main wall and at the sidewall of the opposite side of main wall.

As shown in Figure 6, the first tube sheet 110a and the second tube sheet 110b are connected, so that each side plate crossover partly each other.Fig. 6 has shown an example, and wherein sidewall is at the roughly pars intermedia office crossover of the side of pipe 110.Fig. 7 has shown another example, and wherein sidewall is at the position crossover of the main wall of the close second tube sheet 110b.The main wall of each

tube sheet

110a, 110b all provides Guan Zhubi (wall relatively) 111.The connection sidewall of

tube sheet

110a, 110b provides pipe sidewall 118.

Has interior fin (fin) 120 in the pipe 110.Interior fin 120 is corrugated fins for example, and is formed by compacting by sheet member.For example, interior fin 120 is between the first tube sheet 110a and the second tube sheet 110b, and described interior fin 120 is such as connecting by brazing.So, interior fin 120 is connected to the inner surface of the main wall 111 of pipe.

Pipe 110 is stacked, so that manage main wall 111 toward each other, as shown in Fig. 4,8 and 9.Gas passage 114 is formed in the pipe 110.On the other hand, aquaporin (second fluid passage) 115 is provided by the space that is limited between the adjacent tubes 110, and cooling water flows through described aquaporin 115.The main wall 111 that is arranged in the outermost outmost pipe 110 of pipe 110 heaps provides the tube wall 111a of outermost.

Each pipe 110 has on its two main walls 111 and protrudes 112 and recess 113, as Fig. 5 A to as shown in the 5C.Herein, all pipes 110 all have identical structure.Thereby outermost tubes 110 also has protrusion 112 and recess 113 on outermost tube wall 111a, as shown in Figure 4.

Protrusion 112 is outwards outstanding from managing main wall 111.Protruding 112 for example forms by compacting.Protrude 112 peripheral ends and form, as continuous dykes and dams along the main wall 111 of pipe.

Recess 113 is recessed towards the main wall of pipe 111 from protruding 112 top.Each recess 113 has predetermined length on the longitudinal direction of Guan Zhubi 111.For example equal to protrude 112 size (highly) in size perpendicular to the direction upper recess 113 of managing main wall 111.In other words, protruding 112 does not form at the part place corresponding to recess 113.

Herein, two recesses 113 are formed on each and manage on the main wall 111.In addition, recess 113 is positioned at the diagonal positions place and along vertical side of Guan Zhubi 111.

In addition, pipe 110 is managed at two and to be had first bossing 116 on the main wall 111.First bossing 116 with arranged at predetermined intervals on Guan Zhubi 111.Each bossing 116 is outwards outstanding with the form of pipe from managing main wall 111, and described each bossing 116 has the sizes (highly) identical with protrusion 112 on the direction perpendicular to the main wall 111 of pipe.

Pipe 110 is further managed at two has second bossing 117 on the main wall 111, described second bossing 117 is as the mobile adjustment member that is used to adjust or arrange cooling-water flow.One of each second bossing, 117 contiguous recess 113 (after this left side recess among Fig. 5 A and the 5C, is called first recess 113), one of wherein said recess 113 is positioned at the upstream of other recess 113 with respect to cooling-water flow.

Second bossing 117 is parallel to the minor face of managing main wall 111 and extends, and promptly the longitudinal direction perpendicular to pipe 110 extends.Second bossing 117 has and protrudes 112 identical height.In addition, with respect to the longitudinal direction of the main wall 111 of pipe, compared with the second end 112b that protrudes 112, the first end 112a of the first of second bossing, 117 more close protrusions 112.First extends along vertical limit of the main wall 111 of pipe, and second portion is along the minor face extension of the main wall 111 of pipe.

In addition, second bossing 117 is positioned, so that with the perpendicular direction of pipe 110 longitudinal direction on, first end (upstream extremity) 117a of described second bossing 117 and manage distance between vertical limit of main wall 111 less than second end (downstream) 117b of described second bossing 117 with manage the relatively vertically distance between the limit of main wall 111.

As shown in Figure 8, the pipe 110 with above structure is stacked, so that respectively protrude 112 also contacts toward each other.So, pipe 110 is connected to each other at protrusion 112 places.In the case, first bossing 116 has with second bossing 117 and protrudes 112 identical height.Therefore, adjacent pipe 110 also at first bossing 116 with the contact of second bossing, 117 places be connected.In addition, interior fin 120 is connected to the inner surface of pipe 110.Therefore, the strength-enhanced of the heap of pipe 110.

In the heap of pipe 110, be formed on the main wall 111 of pipe owing to protrude 112, so the space is provided between adjacent tubes.Each space is all protruded 112 and is surrounded.So, cooling-water duct 115 is by this space boundary of removing first bossing 116 and second bossing 117, shown in Fig. 9 and 12.

In addition, opening 113a is provided by the recess 113 of adjacent tubes 110.Herein, the opening 113a that is provided by first recess 113 that is close to second bossing 117 limits inlet opening 113a, and described inlet opening 113a is used for cooling water is imported cooling-water duct 115.Limit exit opening 113b by the opening 113b that provides from second bossing, 117 farther second recesses 113 (the right side recess among Fig. 5 B), described exit opening 113b is used for discharging cooling water from cooling-water duct 115.

Water tank 130 comprises the first box part 130a and the second box part 130b, and the described first box part 130a and the second box part 130b are disposed on the longitudinal direction of pipe 110.The inlet opening 113a of the first box part 130a adjacent tube, 110 heaps is arranged, and the exit opening 113b of the second box part 130b adjacent tube, 110 heaps is arranged.

Among the first tank parts 130a and the second tank parts 130b each all has roughly the U-shaped shape and comprises outer wall 131 and the connecting wall between outer wall 131 132.Outer wall 131 is parallel to each other.For example, the first box part 130a and the second box part 130b by plate member by being bent to form.

The first box part 130a and the second box part 130b are connected to pipe 110 heaps, thereby roughly surround pipe 110 heaps.Therefore, outer wall 131 is relative with outermost tube wall 111a, and connecting wall 132 is relative with pipe sidewall 118.

In the case, because inlet opening 113a and exit opening 113b are positioned on the diagonal positions of pipe 110 heaps, therefore the first box part 130a is connected from the opposite side of managing 110 heaps with the second box part 130b.Particularly, the coupling part 132 of the first box part 130a is relative with inlet opening 113a, and the coupling part 132 of the second box part 130b is relative with exit opening 113b.

In addition, as shown in Figure 11, the first box part 130a and the second box part 130b are engaged with each other at their place, end, so that their outer wall 131 in one plane.Thereby the first box part 130a and the second box part 130b place, roughly centre position at pipe 110 heap on pipe 110 and longitudinal direction engages.For example, the end of the first box part 130a and second box part 130b crossover each other.

Though the first box part 130a and the second box part 130b are connected to pipe 110 heaps in an opposite direction, these have identical shaped.Thereby, the concrete shape of the first box part 130a and the second box part 130b hereinafter is described as an example about the first box part 130a.

As shown in Fig. 1,2 and 10, the outer circumference end of each outer wall 131 all contacts and is connected to the protrusion 112 of outermost tube wall 111a.Each outer wall 131 remove major part outside the outer circumference end, on the outward direction of the box part 130a of U-shaped shape, from the outer circumference end projection.In addition, first recess 135, second recess 136 and reinforcing rib 137 are formed on the major part of projection of each outer wall 131.

First recess 135 is recessed from protruding major part, thereby contacts and be connected to first bossing 116 of outermost tube wall 111a.Second recess 136 is recessed from the major part of projection, thereby contacts and be connected to second bossing 117 of outermost tube wall 111a, as mobile adjustment member.Reinforcing rib 137 is positioned between first recess 135, and outstanding from the main wall of projection, as shown in Figure 2.

As shown in Fig. 9 and Figure 10, the space is set between an outer wall 131 and the outermost wall 111a.The space is surrounded by the protrusion 112 of the outer circumference end of outer wall 131 and outermost tube wall 111a.Thereby similar to cooling-water duct 115, end aquaporin 115a is by this space boundary of removing first bossing 116, first recess 135 and second bossing 117 and second recess 136.

In addition, as shown in Figure 8, open-ended 113c is formed between first recess 113 of outer wall 131 and outermost tubes 110, is used for cooling water is directed to end aquaporin 115a.Equally, open-ended 113c is formed between second recess 113 of outer wall 131 and outermost tubes 110, is used for cooling water is discharged from end aquaporin 115a.

Connecting wall 1 32 contacts of the first box part 130a also are connected to sidewall 118, and inlet opening 113a, 113c are formed on the described sidewall 118.Similarly, connecting wall 132 contacts of the second box part 130b also are connected to sidewall 118, and

exit opening

113a, 113c are formed on the described sidewall 118.

The first box part 130a also is formed with projection 133.Projection 133 is in expansion on the outward direction of the first box part 130a and extension on outer wall 131 and connecting wall 132.In connecting wall 132, projection 133 is relative with inlet opening 131a, 131c, thereby covers or encase inlet opening 131a, 131c, and gap 133a is limited to the inner surface of projection 133 and manages between 110 inlet opening 113a, the 113c, as shown in Figure 12.Gap 133a is communicated with aquaporin 115,115a by inlet opening 113a, 113c.In addition, end aquaporin 115a is partly expanded by the projection 133 that is formed on the outer wall 131, as shown in Figure 9.

As shown in Fig. 4 and 12, pore 134 is formed on the projection 133.Water enters pipe (duct member) 141 and is connected to and enters hole 134.Therefore, aquaporin 115,115a enter pipe 141 by inlet opening 113a, 113c, gap 133a, pore 134 and water and are communicated with the outside of EGR gas cooler 100.Therefore, inlet portion is provided by the projection 133 (gap 133a) that water enters the pipe 141 and first box part 130a.Water enters pipe 141 corresponding to intake section, be used for cooling water is directed to the gap 133a of projection 133, and projection 133 (gap 133a) is used for cooling water is distributed into aquaporin 115,115a corresponding to distribution portion.

Equally, water outlet pipe (duct member) 142 is connected to the projection 133 of the second box part 130b.Aquaporin 115,115a also pass through exit opening 113b, 113c, gap 113a, and pore 134 and water outlet pipe 142 are connected with the outside.Thereby export department is provided by the projection 133 (gap 133a) of the water outlet pipe 142 and the second box part 130b.Projection 133a (gap 133a) is used to collect the cooling water of discharging from aquaporin 115,115a corresponding to collecting part, and water outlet pipe 142 is corresponding to exit portion, outside the cooling water that is used for dividing from collection unit is discharged to.

First gas cabinet 151 and second gas cabinet 152 are connected to vertical end of pipe 110 heaps.For example, first gas cabinet 151 is connected to first end of neighboring entry portion, and second gas cabinet 152 is connected to second end of contiguous export department.

First gas cabinet 151 has cup-shaped, wherein is used to limit the case space.First gas cabinet 151 is connected, so that it limits the end contact of opening and is connected to the end of the first box part 130a and the outer peripheral portion of first end of the pipe 110 that piles up.Thereby, the case space of first gas cabinet 151 be limited to the pipe 110 gas inside passages 114 be communicated with.

In addition, gas inlet pipe 151a is connected to the sidewall of first gas cabinet 151, thereby is communicated with the case space.For example, gas inlet pipe 151a and water inlet pipe 141 are disposed in the same side of EGR gas cooler 100.Gas inlet pipe 151a has flange 151b to be connected to the discharge gas recirculation system.So, gas passage 141 is connected with discharge gas recycle gas by first gas cabinet 151 and gas inlet pipe 151a.

Second gas cabinet 152 has and first gas cabinet, 151 similar shapes.Second gas cabinet 152 is connected, so that it limits the port contact of opening and is connected to the end of the second box part 130b and the outer peripheral portion of second end of the pipe 110 that piles up.Therefore, the case space that is limited in second gas cabinet 152 is connected with gas passage 114.

In addition, gas outlet tube 152a is connected to the sidewall of second gas cabinet 152.For example, gas outlet tube 152a is disposed on the side identical with gas inlet pipe 151a and water inlet pipe 141.Gas outlet tube 152a has flange 152b in its end.Therefore, the discharge gas that passes gas passage 114 is discharged from EGR gas cooler 100 by second gas cabinet 152 and gas outlet tube 152a.

In this EGR gas cooler 100, shown in the arrow E G among Fig. 1, the part of the discharge gas of discharging from engine is from inlet gas pipe 151a, first gas cabinet, 151 inflow gas passages 114.Discharge gas through gas passage 114 is discharged from and turns back to engine by second gas cabinet 152 and gas outlet tube 152a.

On the other hand, shown in the arrow C W among Fig. 1, engine cooling water flows into aquaporin 115,115a from intake section, and described intake section is provided by water inlet pipe 141, gap 133a and inlet opening 113a, 113c.Discharged from export department through the cooling water of aquaporin 115,115a, described export department is by

exit opening

113b, 113c, and gap 133a and water outlet pipe 142 provide.So, heat exchange is at the discharge gas that just flows through gas passage 114 with just flowing through between the cooling water of aquaporin 115,115a and carry out.As a result, discharging gas is cooled.

In general heat exchange, pore is formed on the central layer with predetermined space, and the end of pipe is inserted in the pore of central layer.That is, pipe is supported by central layer with predetermined space, thereby the passage between the adjacent tubes is provided.

In EGR gas cooler 100, protrusion 112 and recess 113 are formed on the main wall 111 of pipe.Thereby aquaporin 115 is limited by the space between the main wall 111 of the pipe that is arranged on adjacent tubes 110, and inlet opening 113a and

exit opening

113b, 113c are provided by recess 113.

Therefore, gas passage 114 and aquaporin 115 are separated and do not need central layer.That is, aquaporin 115 is set up and does not use central layer.In addition owing to do not need central layer, therefore the end of pipe is inserted step in the hole of central layer in making EGR gas cooler 100 not necessarily.Therefore, the manufacturing cost of EGR gas cooler 100 reduces.

In this embodiment, the size of recess 113 equals to protrude 112 height.Therefore, the size of inlet opening 113a and exit opening 113b increases.Thereby cooling water flows into and the resistance of outflow aquaporin 115 reduces.

In addition, inlet opening 113a and exit opening 113b are positioned on the diagonal positions of the main wall 111 of pipe.Therefore, the easy immobilising zone of cooling water is reduced.That is, cooling water does not still less flow in aquaporin 115 possibly.Therefore, heat exchanger effectiveness increases.

In addition, second bossing 117 partly is formed on the main wall 111 of pipe as flow adjustment.Therefore, thereby the cooling water that enters from

inlet opening

113a, 113c can be by tuning and flow to the inside of pipe 110 towards the second end 117b of second bossing 117, shown in the dotted arrow CW1 among Fig. 5 A.So, cooling water can roughly be guided on aquaporin 115 equably.That is, heat exchange is performed by using the main wall 111 of pipe effectively.Therefore, heat exchanger effectiveness increases.

Discharge under the situation of the corresponding position of part of gas flow with high temperature in cooling water is stuck in aquaporin 115, heat exchange is exceedingly carried out, and causes the boiling of cooling water.Yet with respect to discharging gas stream, second bossing 117 is formed on the upstream side that each manages main wall 111 in this embodiment.Therefore, cooling water is still less possibly owing to excessive heat exchange is seethed with excitement.

In an embodiment, each pipe 110 is by connecting the first tube sheet 110a and the second tube sheet 110b constitutes.The first tube sheet 110a and the second tube sheet 110b pass through such as formation such as bending, compacting, roll extrusion.Therefore, and be that the situation that the flat tube shape forms pipe is compared by making the cylindrical duct parts-moulding, pipe 110 easily and with the cost that reduces is produced.

In addition, because interior fin 120 is set in the gas passage 114 of pipe 110, turbulence effect (turbulence effect) is provided to the discharge gas flow.So, heat exchanger effectiveness further improves.

Protrusion 112 and recess 113 also are formed on the outermost tube wall 111a of outermost tubes 110, and the outer wall 131 of

box part

130a, 130b is connected to the protrusion 112 of outermost tube wall 111a.Therefore, the end aquaporin 115a with end entrance and exit opening 113c is formed between outermost tube wall 111a and the outer wall 131.So, because heat exchange area increases, heat exchanger effectiveness improves.

In each

box part

130a, 130b, outer wall 131 connects by connecting wall 132.That is, outer wall 131 integrally forms box part 130a, 130b.Therefore, insert in the space that is limited between the outer wall 131, can easily box

part

130a, 130b be connected to pipe 110 heaps by managing 110 heaps.

The connecting wall 132 of the first box part 130a and the second box part 130b and pipe 110 sidewall 118 are relative and be connected on the described sidewall 118.Projection 133 is formed on the connecting wall 132 and entrance and exit opening 113a, the corresponding position of 113b, 113c, so that gap 133a is set between the inner surface of projection 133 and entrance and

exit opening

113a, 113b, the 113c.In addition, water inlet pipe 141 and water outlet pipe 412 are connected to the pore 134 that is formed on the projection 133.

So, inlet portion and export department are provided by projection 133 and water inlet and outlet 141,142.That is, inlet portion and export department form with simple structure.Utilize this configuration, cooling water flows into and the enlargement loss when flowing out aquaporin 115,115a and dwindle loss and reduce.That is, because the pressure loss of cooling-water flow reduces, heat exchanger effectiveness increases.

(second embodiment)

To second embodiment be described with reference to Figure 13.In a second embodiment, except that the structure of the EGR gas cooler 100 of first embodiment, EGR gas cooler 100A has shunt valve 110A and spaced walls 160.In Figure 13,, therefore exemplarily shown water inlet portion because water inlet portion has similar structure with water out portion.

Shunt valve 110A is stacked on the side (downside among Figure 13) of pipe 110 heaps.Shunt valve 110A limits gas passage 114, discharges gas and flows through described gas passage 114, and is similar to pipe 110.Spaced walls 160 is between pipe 110 and shunt valve 110A.Spaced walls 160 is for example made by stainless steel and is had a rectangular shape.Pipe 110 heaps, spaced walls 160 and shunt valve 110A are arranged in the water tank 130.

Similar to first embodiment, water tank 130 comprises the first box part 130a and the second box part 130b.Pipe 110 heaps, spaced walls 10 and shunt valve 110A are positioned between the outer wall 131 of

box part

130a, 130b.

As pipe one of 110 and the end pipe 110a relative with spaced walls 160 have and protrude 112, manage 110 similar to other.Therefore, end pipe 110a is protruding the contact of 112 places and is being connected to spaced walls 160.End aquaporin 115b is formed between the main wall 111 of pipe and spaced walls 160 of end pipe 110a.

In addition, recess 113 is formed on the end pipe 110a.Therefore, inlet opening 113d is arranged between the recess 113 and spaced walls 160 of end pipe 1 10s.End aquaporin 115b is communicated with gap 133a by inlet opening 113d.

In the example of Figure 13, EGR gas cooler 100A has two shunt valve 110A.Similar to 110, each among the shunt valve 110A all is made of first tube sheet and second tube sheet.Limit gas passage 114 among the shunt valve 110A, discharge gas and flow through described gas passage 114.Though show, gusset plate is between first tube sheet and second tube sheet and be connected to the inwall of first tube sheet and second tube sheet.The cross section of each gusset plate is crank shape (crank shape), and spacing is greater than the spacing of the interior fin 120 of first embodiment.

Shunt valve 110A is formed with and protrudes 112A, and is similar to the protrusion 112 of pipe 110.Thereby shunt valve 110A is stacked, so that protrude 112A toward each other and be connected to each other.In addition, the space is set between the adjacent shunt valve 110A as insulated space.

As one among the shunt valve 110A and the first end shunt valve 110A1 relative, protrude the 112A place at it and be connected to spaced walls 160 with spaced walls 160.Thereby insulated space 115c also is arranged between the main wall of pipe of spaced walls 160 and first end shunt valve 110A1.

As one among the shunt valve 110A and protrude 112A with outer wall 131 opposite second end shunt valve 110A2 by it and be connected to outer wall 131.Therefore, insulated space 115c also is arranged between the main wall of pipe and outer wall 131 of the second end shunt valve 110A2.

Stride across gap 113a extension with the part of projection 133 corresponding spaced walls 160.The end of the part of spaced walls 160 contacts and is connected to the inwall of projection 133.Therefore, the insulated space 115c that is limited to the shunt valve 110A outside opens by spaced walls 160 and the aquaporin 115 that is limited to pipe 110 and the gap 113a outside, 115a, 115b branch.So, cooling water is not allowed to enter insulated space 115c.

In EGR gas cooler 100A, the part that shunt valve 110A is configured to allow to discharge gas flows into wherein.On the other hand, because cooling water is not directed among the shunt valve 110A, in shunt valve 110A, be reduced with the heat exchange of cooling water.

For example, valve gear is set at the volume that will be directed into the discharge gas of shunt valve 110A in first gas cabinet 151 with control.Valve gear can be controlled to allow to discharge gas and arrive pipe 110 and shunt valve 110A or only arrive pipe 110.Since discharge gas enter pipe 110 with discharge gas enter the volume ratio of shunt valve 110A can be controlled, the temperature of therefore discharging gas is controlled.

Because insulated space 115c is arranged between first end shunt valve 110A1 and the spaced walls 160, just the heat exchange between discharge gas that flows in first end shunt valve 110A1 and the cooling water that just flowing in the aquaporin 115b of end is reduced.On the other hand, owing to end aquaporin 115b is set between spaced walls 160 and the end pipe 110s, so the effect of discharge gas strengthens among the end pipe 110s.Therefore, heat exchanger effectiveness increases.

In a second embodiment, shunt valve 110A only has the protrusion 112 that is used to provide insulated space 115c.That is, recess 113 is not formed on the shunt valve 110A.Yet shunt valve 110A can have recess 113.That is, shunt valve 110A can constitute by using pipe 110.

In the above description, ERG gas cooler 100A has two shunt valve 110A.Yet the quantity of shunt valve 110A is not limited to two especially.The degree that the quantity of shunt valve 110A can change according to the needs of effluent air temp changes.

In addition, gusset plate is set up and is connected among the shunt valve 110A.Replace gusset plate, can form from managing main wall 111, and the recess of the relative main wall of pipe is connected to each other in the inside of shunt valve 110A towards the recessed recess in the inboard of shunt valve 110A.

(other embodiment)

The shape of recess 113 and/or size can be modified.In above embodiment, the size of recess 113 equals to protrude 112 height.Yet the size of recess 113 can reduce according to the resistance of cooling water through

inlet opening

113a, 113c and exit opening 113b, 113c.Selectively, the size of recess 113 can be greater than the height that protrudes 112.

The position of recess 113 can be modified.Replace diagonal positions, recess 113 can be formed on identical vertical side of pipe 110.In the case, water inlet pipe 141 and water outlet pipe 142 are connected on the same side of pipe 110 heaps.Therefore, water tank 130 needn't be made of two box part 130a, 130b.That is, water tank 130 can be made of single box part.

In above embodiment, the minor face that second bossing 117 is parallel to pipe 110 forms.Yet second bossing 117 can be revised according to the cooling-water flow condition.For example, second bossing 117 can tilt with respect to pipe 110 minor face, so that manage vertical end of 110 and the distance between second bossing 117 with increasing gradually from the distance of inlet opening 113a.Selectively, second bossing 117 can have curved shape.In addition, each in the mobile adjustment member can be provided with by a plurality of second bossings 117.That is, second bossing 117 can be divided into a plurality of parts.In addition, second bossing 117 can be removed.

In addition, each pipe 110 constitutes always not necessary by the first tube sheet 110a and the second tube sheet 110b.For example, pipe 110 can be formed by single duct member.

In above embodiment, protrude 112 and be formed on the main wall 111 of two pipes of each pipe 110,110A.Yet protrusion 112 can only be formed on one of main wall of pipe of pipe 110,110A.In the case, pipe 110,110A can be stacked, so as to form it on protrude 112 the main wall 111 of pipe with its on the adjacent main wall 111 of formation protrusion 112 is relative.In addition in the case, the space is set between adjacent tubes 110, the 110A.

In addition, interior fin 120 can be removed by heat exchanger effectiveness as required.In addition, one of outer wall 131 of water tank 130 or two outer walls 131 can be removed according to the heat exchanger effectiveness of needed discharge gas.

In addition, to have projection 133 be not necessary to water tank 130 all the time.For example, pore 134 can enlarge on the zone that forms inlet opening 113a or exit opening 113b, thereby and the aperture of managing 141,142 end can be increased size corresponding to pore 134.In the case, projection 133 can be removed.Thereby the end of pipe 141a is corresponding to the distribution portion of inlet portion, and manages 142 the end collection part corresponding to export department.

In addition, use of the present invention is not limited to the EGR gas cooler, and can be applied to any other heat exchanger.For example, heat exchanger 100 can be as discharging the gas recovery heat exchanger, and described discharge gas recovery heat exchanger is carried out and is discharged to the discharge gas of air and the heat exchange between the cooling water, heats cooling water thus.

In addition, the material of the parts of heat exchanger is not limited to stainless steel.Parts can be made by other material such as aluminium alloy or copper alloy according to service condition.

Exemplary embodiment of the present invention has more than been described.Yet the present invention is not limited to above exemplary embodiment, and can otherwise implement under the situation that does not deviate from spirit of the present invention.

Claims

1. heat exchanger that is used to carry out the heat exchange between the first fluid and second fluid, described heat exchanger comprises:

A plurality of pipes (110), each pipe (110) limits first fluid passage (114) therein and has the first main wall (111) and the second main wall (111), first fluid flows through described first fluid passage (114), and wherein at least one in the first main wall (111) and the second main wall (111) has: along the protrusion (112) of its outer circumference end; First recess (113) and second recess (113), protrusion (112) is projected into the outside of pipe (110), first recess (113) and second recess (113) are recessed in the pre-position from the end of protruding (112), wherein pipe (110) is stacked, so that the first main wall (111) and the second main wall (111) are toward each other, second fluid passage (115) of flowing through second fluid is set at the first relative main wall of adjacent tubes (110) and the space between the second main wall (111) limits, and described space is protruded (112) and is surrounded, first opening (113a) that is communicated with second fluid passage (115) is limited by first recess (113), and second opening (113b) that is communicated with second fluid passage (115) is limited by second recess (113);

The second fluid intake portion (133,141), the described second fluid intake portion (133,141) is arranged with first opening (133a) and is communicated with, second fluid is inducted in second fluid passage (115); With

The second fluid issuing portion (133,142), the described second fluid issuing portion (133,142) is arranged with second opening (133a) and is communicated with, to discharge second fluid from second fluid passage (115).

2. heat exchanger according to claim 1, wherein:

The described second fluid intake portion (133,141) include notch portion (141) and distribution portion (133), described intake section (141) is used to guide second fluid, described distribution portion (133) is disposed in intake section (141) with respect to second fluid mobile downstream to be will being dispensed into second fluid passage (115) from second fluid that intake section (133) flows, and

The described second fluid issuing portion (133,142) comprise collection part (133) and exit portion (142), described collection part (133) is used for second fluid through second fluid passage (115) is collected in wherein, and described exit portion (142) is used for discharging second fluid from collecting part (133).

3. heat exchanger according to claim 1 and 2, wherein:

The described first main wall and second main wall (111) both have protrusion (122), first recess (133) and second recess (133), and

Described pipe (110) is stacked, so that the protrusion (112) of adjacent two pipes (110) is also contact toward each other, first recess (133) of adjacent two pipes (110) is toward each other limiting first opening (133a), and second recess (133) of adjacent two pipes (110) is toward each other to limit second opening (133b).

4. heat exchanger according to claim 1 and 2, wherein:

In described first recess and second recess (133) each with respect to the first main wall direction vertical with the second main wall (111) on all have the size of the size that equals to protrude (112).

5. heat exchanger according to claim 1 and 2, wherein:

The described first main wall and the second main wall (111) have the essentially rectangular shape, and

Described first recess and second recess (133) are arranged and are disposed on the diagonal positions along vertical limit of rectangular shape.

6. heat exchanger according to claim 1 and 2, wherein:

On at least one in the first main wall (111) and the second main wall (111) of in the described pipe each, all have mobile adjustment member (117) corresponding to position with respect to the upstream position of the first fluid stream that in first fluid passage (114), flows, and

Flowing, adjustment member (117) is configured to be scattered so that second fluid spreads all over second fluid passage (115).

7. heat exchanger according to claim 1 and 2, wherein:

In the described pipe each all is made of first duct member (110a) and second duct member (110b), and

The described first main wall and the second main wall be included in respectively first duct member and second tube portion (110a, 110b) in.

8. heat exchanger according to claim 1 and 2, wherein:

In the described pipe each all has the interior fin (120) in first fluid passage (114).

9. heat exchanger according to claim 2 further comprises:

Side member (132), described side member (132) is connected to vertical side of a plurality of pipes (110), wherein:

Described side member (132) has projection (133) in the position corresponding to first opening (133a),

Described projection (133) provides gap (133a) therein and encases first opening (133a),

Described distribution portion (133) is limited by projection (133), and

Described intake section (141) has tubular form and is communicated with the gap (133a) that is provided by projection (133).

10. heat exchanger according to claim 2 further comprises:

Side member (132), described side member (132) is connected to vertical side of a plurality of pipes (110), wherein

Described side member (132) has projection (133) in the position corresponding to second opening (133b),

Described projection (133) provides gap (133a) therein and encases second opening (133b),

Described collection part (133) is limited by projection (133), and

Described exit portion (142) has tubular form and is communicated with the gap (133a) that is provided by projection (133).

11. according to claim 9 or 10 described heat exchangers, wherein:

Described a plurality of pipe (110) comprises and is stacked on outermost outermost tubes, and described outermost tubes provides outermost tube wall (111a),

Described outermost tube wall (111a) has along the end of its outer circumference end and protrudes (112), protrude from the end the recessed first end recess in the end of (112) (113,113c) and the second end (113,113c), described heat exchanger further comprises:

Outer wall parts (131), described outer wall parts (131) are arranged along outermost tube wall (111a), so that end passage (115a) is set between outer wall parts (131) and the outermost tube wall (111a), and is protruded the space that (112) surround by the end and limit, wherein

Described end passage (115a) is communicated with the second fluid intake portion (133,141) and the second fluid issuing portion (133,142) by first end recess (113c) and the second end recess (113c) respectively.

12. heat exchanger according to claim 11 further comprises:

Case (130,130a, 130b), (130,130a 130b) has connecting wall (132) and outer wall (131) to described case, and described outer wall (131) extends from the opposite side of connecting wall (132), wherein

(130,130a 130b) is connected to a plurality of pipes (110) to described case, so that outer wall (131) is arranged along the outermost tubes that is stacked on the outermost place, wherein

Described outer wall parts be comprised in case (130,130a, at least one in outer wall 130b) (131), and side member is comprised in the connecting wall (132) of case (130).

13. heat exchanger according to claim 12, wherein:

(130,130a, outer wall 130b) (131) go up or spread all over outer wall (131) and extend described projection (133) at case.

14. heat exchanger according to claim 1 and 2 further comprises:

At least one shunt valve (110A), described at least one shunt valve (110A) limits the first fluid passage (114) that first fluid flows through therein, and on its periphery, limiting area of insulation (115c), described shunt valve (110A) is arranged to and is parallel to a plurality of pipes (110); With

Spaced walls (160), described spaced walls (160) are arranged between pipe (110) and the shunt valve (110A) so that area of insulation (115c) is separated from the zone that second fluid flows.

15. heat exchanger according to claim 14, wherein:

Described shunt valve (110A1) has the main wall relative with spaced walls (160),

The main wall of described shunt valve (110A1) has protrusion (112A), described protrusion (112A) is given prominence to and contact interval wall (160) towards spaced walls (160) on the outer circumference end of described main wall, so that at least a portion of area of insulation (151c) is limited by the space that is provided with between the main wall of shunt valve (110A1) and the space bar (160), and described space is surrounded by the protrusion of shunt valve (110A1) (112).

16. heat exchanger according to claim 14, wherein:

One in a plurality of pipes (110s) relative with spaced walls (160) provides the relatively main wall relative with spaced walls (160),

Described main relatively wall has protrusion (122), first recess (113d) and second recess (113d), protruding (112) gives prominence to and contacts with spaced walls (160) towards spaced walls (160), so that space (115b) is set between the main relatively wall and spaced walls (160) of pipe (110a), and the protrusion (112) that described space (115b) managed (110s) surrounds, and.

Described space (115b) is communicated with the second fluid intake portion (133,141) and the second fluid issuing portion (133,142) by first recess (133d) and second recess (133d) of main relatively wall respectively.

17. heat exchanger according to claim 1 and 2 further comprises:

First fluid inlet tank (151), described first fluid inlet tank (151) limits first case space and has opening, the first fluid inlet tank is connected to pipe (110), so that first end of pipe (110) is disposed in the opening of first fluid inlet tank (151), and first the case space first fluid passage (141) interior with being limited to pipe (110) directly is communicated with

First fluid EXPORT CARTON (152), described first fluid EXPORT CARTON (152) limits second case space and has opening, first fluid EXPORT CARTON (152) is connected to pipe (110), so that second end of pipe (110) is disposed in the opening of first fluid EXPORT CARTON (152) and second case space first fluid passage (114) interior with being limited to pipe (110) directly is communicated with.