CN103097847A

CN103097847A - Heat exchanger

Info

Publication number: CN103097847A
Application number: CN2011800342107A
Authority: CN
Inventors: 谷川茂利
Original assignee: CI Kasei Co Ltd; CKU Inc
Current assignee: CI Kasei Co Ltd; CKU Inc
Priority date: 2010-07-12
Filing date: 2011-07-07
Publication date: 2013-05-08
Anticipated expiration: 2031-07-07
Also published as: JP2012021668A; JP5393606B2; CN103097847B; TWI470181B; US20130112380A1; WO2012008348A1; KR20130100982A; TW201221887A

Abstract

Provided is a heat exchanger for exchanging heat using a multiple tube, wherein heat can be efficiently exchanged. A heat exchanger (1) using a heat transfer tube (4) having outer tubes (42) and inner tubes (41) is configured so that both ends of each inner tube (41) are exposed from each outer tube (42), and header units (21) for circulating a first fluid from the outer peripheries of the exposed portions of the inner tubes (41) through gaps with the outer tubes (42), are provided. The header units (21) are vertically stacked so as to be spaced at predetermined intervals (W) by inserting interval forming members (8) or the like therebetween. Furthermore, the portions of each inner tube, which are exposed from each header unit (21), are covered externally from both sides by a header cover (3b) for circulating a second fluid, so that the second fluid is introduced to the inside of the header cover. Thus, the second fluid is introduced from the header cover (3b) to the inside of each inner tube (41), and is also introduced to the outer surface of each outer tube (42) in the axial direction via the intervals (W), so that heat is exchanged on the inner side and the outer side of each outer tube (42).

Description

Heat exchanger

Technical field

The invention relates to a kind of heat exchanger that has the collector (header) of left and right and be arranged at the heat-transfer pipe between described collector, more specifically, the invention relates to that a kind of utilization makes fluid flow and improve the heat exchanger of the efficient of heat exchange along direction of principal axis in the outside of the peripheral direction of heat-transfer pipe.

Background technology

In the past, proposed to have the various heat exchangers that use multiple pipe.Fig. 8 represents to have the structure of the heat exchanger of common multiple pipe.In Fig. 8, label 83 is coaxitron, and this coaxitron is arranged on inner tube 85 inboard of outer tube 84 with coaxial shape.About this multiple pipe, such as having peripheral part in inner tube that a plurality of multiple pipes along axial fin (fin) are set, (the patent documentation 1～patent documentations 3) such as multiple pipes of spiral helicine fin being set at the peripheral part of inner tube.In the situation that with this kind coaxitron to add hot fluid carry out cooling, the inside of heated fluid by inner tube 85, and cold fluid makes the fluid in inner tube 85 cooling by the gap of outer tube 84 with inner tube 85 thus.

And, about having used another heat exchanger of multiple pipe, the known heat exchanger (patent documentation 4) that structure is as shown in Figure 9 arranged also.In Fig. 9,

label

210L, 210R are the collector that is arranged at the left and right, and label 210 is for across the coaxial heat-transfer pipe that arranges between collector 210L, the 210R of this left and right.This heat-transfer pipe 210 is made of with outer tube 212 inner tube 211 of coaxial shape, makes inner tube 211 extend and the fluid of the object that becomes heat exchange is flowed into from the collector 210L that is separated by collector wall 213 from outer tube 212.On the other hand, be divided plate 214 near the two ends of outer tube 212 and seal, make cold fluid flow into by collector wall 213 and divide in the space that plate 214 surrounds, and flow into since then and inner tube 211 between in the gap area that surrounds.

Patent documentation 1: Japanese Patent Laid-Open 2005-083667 communique

Patent documentation 2: Japanese Patent Laid-Open 2007-163092 communique

Patent documentation 3: Japanese Patent Laid-Open 2008-69993 communique

Patent documentation 4: Japanese patent laid-open 07-133993 communique

Summary of the invention

Yet, in the situation that carry out heat exchange with the multiple pipe of this kind, following problem can occur.That is, in as Fig. 8, heat exchanger shown in Figure 9, make the fluid of the object that becomes heat exchange by thin inner tube, if thereby want to guarantee must make this inner tube chap by large flow.Yet, if make the chap of this kind inner tube, only can carry out heat exchange at the outer surface of inner tube, thereby the problem of the deterioration of efficiency of heat exchange can occur.

To this, the present invention is in order to solve above-mentioned problem, even if its purpose is to provide in a kind of heat exchanger carry out heat exchange with multiple pipe in the situation that guarantee that large flow also can carry out heat exchange efficiently.

Namely, the present invention is in order to solve above-mentioned problem, a kind of heat exchanger is provided, its use has the heat-transfer pipe of outer tube and inner tube, carry out heat exchange between the first fluid in the gap of flow through outer tube and inner tube and the second fluid in the inner tube of flowing through, be provided with in this heat exchanger: the collector unit makes the two ends of above-mentioned inner tube extend from outer tube, and makes above-mentioned first fluid be circulated to the gap of peripheral part and the outer tube of this extended inner tube; The second collector is circulated to from this extended inner tube in collector unit second fluid; And clearance portion, with so that be circulated between stacked collector unit from the second fluid of above-mentioned the second collector, and make from the second fluid of above-mentioned the second collector inside by inner tube, and also make second fluid from above-mentioned the second collector via above-mentioned clearance portion along the outer surface of direction of principal axis by outer tube.

More specifically, be provided with in this heat exchanger: the collector unit, this collector unit is kept near the end of outer tube by the first wall, and make from the extended inner tube of outer tube at the second wall relative with this first wall and extend, make above-mentioned first fluid be circulated to the gap of inner tube and outer tube in the space that is surrounded by this first wall and the second wall; The second collector makes second fluid be circulated to the second extended inner tube of wall from this collector unit; And clearance portion, second fluid from above-mentioned the second collector is circulated between stacked each collector unit, and make from the second fluid of above-mentioned the second collector inside by inner tube, and also make second fluid from above-mentioned the second collector via above-mentioned clearance portion along the outer surface of direction of principal axis by outer tube.

So, because utilizing second fluid to carry out cooling or heating to the first fluid in the gap of flow through outer tube and inner tube with the outside from inboard, therefore can improve the efficient of heat exchange.

And in such invention, the clamping gap forms member and forms clearance portion between stacked collector unit and collector unit.

So, in the situation that the size of change clearance portion, the thickness that can form by changing the gap member is dealt with, thereby can easily be set as the gap of optimal size.

Perhaps, form convex shaped part or concavity section with the collector unit, and utilize between this convex shaped part, concavity section and form clearance portion.

So, only stacked collector unit with convex shaped part, concavity section just can form clearance portion, thereby does not need gap in assembling procedure to form the bonding etc. of member.

In addition, be provided with axial branch piece along heat-transfer pipe between the heat-transfer pipe of the upper strata of stacked collector unit and lower floor.

So, can make the second fluid that flows into through clearance portion via branch piece to the face side branch of heat-transfer pipe, thereby can further make second fluid flow through heat-transfer pipe near surface and improve the efficient of heat exchange.

And, this branch piece is contacted with the heat-transfer pipe of stacked collector unit, and make the second fluid that flows into from above-mentioned clearance portion to heat-transfer pipe side branch.

Consist of if so, by just can forming clearance portion between the heat-transfer pipe that branch piece is held on the collector unit, and by making this branch piece contact with heat-transfer pipe and can carry out thermal diffusion.

According to the present invention, a kind of heat exchanger is provided, use has the heat-transfer pipe of outer tube and inner tube, carry out heat exchange between the first fluid in the gap of flow through outer tube and inner tube and the second fluid in the inner tube of flowing through, be provided with in this heat exchanger: the collector unit, the two ends of above-mentioned inner tube are extended from outer tube, and make above-mentioned first fluid be circulated to the gap of peripheral part and the outer tube of this extended inner tube; The second collector makes second fluid be circulated to the inner tube of extending from this collector unit; And clearance portion, with so that be circulated between stacked collector unit from the second fluid of above-mentioned the second collector, and make from the second fluid of above-mentioned the second collector inside by inner tube, and also make second fluid from above-mentioned the second collector via above-mentioned clearance portion along the outer surface of direction of principal axis by outer tube, therefore can utilize from inboard and the outside second fluid that the first fluid in the gap that flows into outer tube and inner tube is carried out cooling or heats, thereby can improve the efficient of heat exchange.

Description of drawings

Fig. 1 means the skeleton diagram of the heat exchanger of one embodiment of the present invention.

Fig. 2 is the A-A sectional skeleton diagram in Fig. 1.

Fig. 3 is the B-B sectional skeleton diagram in Fig. 1.

Fig. 4 means near the stereogram of the collector of the first embodiment.

Fig. 5 means the figure of convex shaped part of the collector unit of the second embodiment of the present invention.

Fig. 6 means the figure of another convex shaped part of the collector unit of the second embodiment of the present invention.

Fig. 7 means the skeleton diagram of the heat exchanger of the 3rd embodiment of the present invention.

Fig. 8 means the figure of the heat exchanger of the multiple pipe of use in the past.

Fig. 9 means the figure of the heat exchanger of the multiple pipe of use in the past.

The specific embodiment

The＜the first embodiment 〉

Below, with reference to accompanying drawing, one embodiment of the present invention is described.Heat exchanger 1 in present embodiment comprises following each parts and consists of as shown in Figure 1: the first collector 2a, with so that the fluid (first fluid) that becomes the object of heat exchange by the gap of inner tube 41 with outer tube 42; And the second collector 2b, be arranged on two outsides of this first collector 2a, and with so that the inside of second fluid by inner tube 41.And, heat exchanger 1 of the present invention is characterised in that: make this first collector 2a with in a plurality of collectors unit 21 the mode that has up and down clearance portion W carry out stacked, and second fluid is passed through from this clearance portion W, carry out cooling or heating with the outside from outer tube 42 with inboard direction of principal axis along heat-transfer pipe 4.Below, the formation of the heat exchanger 1 of present embodiment is elaborated.

If the structure to the first collector 2a of consisting of this heat exchanger 1 describes, this first collector 2a is that the collector unit 21 that will the heat-transfer pipe 4 with inner tube 41 and outer tube 42 be kept carries out stacked and consists of.This collector unit 21 as shown in Figure 4, the a pair of unit chorista 22 in up and down is consisted of up and down relatively, at near i.e. the first wall 23 of a side that is used for installing the end of this outer tube 42, be formed with the profile of this outer tube 42 is cut apart the first recess 28a that half forms, and, with this first wall 23 relative second wall (back 26) on direction of principal axis, also be formed with the profile of inner tube 41 cut apart the second recess 28b that half forms, outer tube 42, inner tube 41 with clamping.The divisional plane 20 of these first walls 23, the second wall 26 is cut apart by the face parallel with the axial plane of the heat-transfer pipe 4 that is arranged in a row, and makes the open portion of the first recess 28a, the second recess 28b towards this divisional plane 20.And, from this first wall 23, the second wall 26, continuous side, bottom surface are set, form peristome 27 at a side, and first fluid is flowed into from this peristome 27.In the situation that form collector unit 21 with the unit chorista 22 that so consists of, make unit chorista 22 relative up and down, come near the end of clamping outer tube 42 by the first recess 28a, and come by the second recess 28b near the end of the inner tube 41 that clamping extends since then, thereby first fluid is flowed between outer tube 42 and inner tube 41.In the situation that the collector unit 21 that heat-transfer pipe 4 in clamping like this carries out stacked, use the gap to form member 8 forms regulation on above-below direction clearance portion W, and under this state, install to cover the header cap 3a of the peristome 27 of each collector unit 21, first fluid is flowed into from this inflow entrance 31a.Form clearance portion W in the situation that form member 8 with this gap, the gap of preparing the gauge corresponding with the gap width of this clearance portion W forms member 8, and this gap is formed member 8 is arranged on the upper surface of collector unit 21 or lower face side and forms the gap.

Secondly, the structure of the second collector 2b described.The second collector 2b makes second fluid flow into from the inner tube 41 of extending from the second recess 28b, in present embodiment, is made of a header cap 3b who covers the first collector 2a, header cap 3a.This header cap 3b becomes the casing structure of heat-transfer pipe 4 of the first collector 2a, its middle body of whole coverings left and right, in the present embodiment so that second fluid flows into and discharges from the inflow entrance 31b, the outlet 32b (with reference to Fig. 1) that are arranged at both end sides.And if second fluid is flowed into via the inflow entrance 31b of the second collector 2b of formation like this, this second fluid flows into from the end of inner tube 41, and also 21 clearance portion W's this second fluid flows along the peripheral part of outer tube 42 from the collector unit.

This kind heat-transfer pipe 4 makes and is connected to outer tube 42 in two inner tubes 41 and makes axial plane separately consistent, thus, even if prevent the expansion of inner tube 41 in the situation that inner tube 41 because high pressure expands, also can will be connected to outer tube 42 in this inner tube 41.In the situation that consist of this kind heat-transfer pipe 4, in order to improve the efficient of heat exchange, for example, the outside dimension of outer tube 42 is set as 0.8mm～2.0mm, be preferably set to 0.9mm～1.5mm, internal diameter size is set as 0.7mm～1.9mm, be preferably set to about 0.8mm～1.4mm.

And, for the heat-transfer pipe 4 of the up and down in the collector unit 21 that so is arranged in stratiform and collector unit 21, branch piece 9 is installed.The mode that this branch piece 9 contacts with the peripheral part with heat-transfer pipe 4 and arranging, and make the second fluid that flows into via clearance portion W form branch to the outer peripheral portion of heat-transfer pipe 4.That is, if there is not this branch piece 9, the second that flows into via clearance portion W cognition is flowed through and is not had the clearance space of heat-transfer pipe 4, thus the deterioration of efficiency of heat exchange.To this, in need not to carry out the clearance space of this heat exchange, branch piece 9 is installed and is made second fluid near heat-transfer pipe 4 sides, and make from the heat diffusion of this heat-transfer pipe 4 and improve the efficient of heat exchange.In the situation that branch piece 9 so is installed, as shown in Figure 2 and Figure 3, in the situation that observe from the direction of principal axis of heat-transfer pipe 4, be arranged on the position overlapping with clearance portion W with the state parallel with the collector unit 21 that forms stratiform.

Secondly, the effect of the situation of the heat exchanger 1 that uses formation like this described.

At first, if first fluid is flowed into from the inflow entrance 31a of the first collector 2a, this first fluid flows into via header cap 3a in each collector unit 21, and branch and along mobile between outer tube 42 and inner tube 41 since then.

And, meanwhile, second fluid is flowed into from the inflow entrance 31b of the second collector 2b.So this second fluid flows in inner tube 41 from the space that is surrounded by header cap 3b, and flow along the direction of principal axis of this inner tube 41.And the second fluid that does not flow into this inner tube 41 flows on the direction of principal axis of heat-transfer pipe 4 via the clearance portion W of collector unit 21.And this second fluid utilization is arranged at the branch piece 9 in the gap of heat-transfer pipe 4, and makes this second fluid heat-transfer pipe 4 side branches up and down, and carries out cooling with the outer side contacts of heat-transfer pipe 4 to first fluid or heating.

So, according to above-mentioned embodiment, have the stacked collector unit, clearance portion W ground 21 of regulation, also the direction of principal axis from this clearance portion W along heat-transfer pipe 4 is by second fluid, and therefore can spread all over whole heat-transfer pipe 4 carries out heat exchange.

And, in present embodiment, will arrange along direction of principal axis with the branch piece 9 of the Surface Contact of heat-transfer pipe 4, therefore make the second fluid that flows into from clearance portion W near the face side of heat-transfer pipe 4, thereby can further improve the efficient of heat exchange.

The＜the second embodiment 〉

Secondly, the second embodiment of the present invention is described.In above-mentioned the first embodiment, form member 8 with the gap and form clearance portion W, and in this second embodiment, as Fig. 5, shown in Figure 6,21 upper surface or lower surface form convex shaped part 25a or the concavity 25b of section in the collector unit, and second fluid is passed through from this gap.In addition, in present embodiment, the member that has added the label identical with the first embodiment has the formation identical with the first embodiment.

Consist of the unit chorista 22 of the collector unit 21 in present embodiment, in the mode with certain thickness, convex shaped part 25a is erected from the downside of bottom surface, form the concavity 25b of section between this convex shaped part 25a and convex shaped part 25a, thus formation clearance portion W.Herein, this convex shaped part 25a forms when manufacturing cell's chorista 22.About this convex shaped part 25a, when making collector unit 21 stacked on top of one another, as shown in Figure 5, convex shaped part 25a with upper strata and lower floor interferes because of meeting, therefore in the situation that the width of clearance portion W is set as " d ", be " d/2 " with the height setting of this convex shaped part 25a, in the time of can interfering at the convex shaped part 25a with upper strata and lower floor thus, gap width be made as " d ".

Perhaps, about this convex shaped part 25a, also can be as shown in Figure 6, by consisting of along the axial thin plate body of heat-transfer pipe 4, make the convex shaped part 25a of upper strata or lower floor overlapping respectively.In the situation that so consist of, the peristome 27 of the collector unit 21 of the collector unit 21 on upper strata and lower floor only staggers with the amount that is equivalent to this thickness of slab, but when at this peristome 27 installation header cap 3a, also can utilize solder material to come landfill this gap.

So, according to the second embodiment, form convex shaped part 25a (or concavity 25b of section) with collector unit 21, therefore when collector unit 21 being carried out need not assemblage gap formation member 8 when stacked, thus the operation in the time of can simplifying stacked operation.

In addition, in present embodiment, by forming convex shaped part 25a, and at this gap formation concavity 25b of section, on the contrary, also can assign to form the concavity 25b of section by the bottom surface sections of this unit chorista 22 of pruning, and form convex shaped part 25a between this concavity 25b of section and the concavity 25b of section.

The＜the three embodiment 〉

Secondly, the 3rd embodiment is described.In above-mentioned the first embodiment and the second embodiment, utilize the gap to form member 8, convex shaped part 25a etc. and form clearance portion W, but in present embodiment, as shown in Figure 7, can utilize the branch piece 9 between the heat-transfer pipe 4 that is held on upper strata and lower floor to form clearance portion W.In addition, in present embodiment, be also that the member that has added the label identical with the first embodiment has the formation identical with the first embodiment.

The heat exchanger 1 of present embodiment is not to exist the gap in Fig. 4 form the state of member 8 and consist of, therefore between the heat-transfer pipe 4 between the collector unit 21 of left and right, the branch piece 9 with thickness is installed, and this branch piece 9 is contacted with heat-transfer pipe 4, thereby can be at the collector unit 21 formation clearance portion W of up and down.

This branch piece 9 is made of the high metallicity member of thermal conductivity, makes the heat diffusion of heat-transfer pipe 4 by the Surface Contact with each heat-transfer pipe 4, thereby and makes the second fluid that flows into from clearance portion W carry out heat exchange towards heat-transfer pipe 4 side branches.

In addition, if this kind branch piece 9 is made of the metal-made rigid member, the gap of the collector unit 21 of up and down is decided by the thickness of this branch piece 9, in the situation that the thickness of the deflection of heat-transfer pipe 4, branch piece 9 has error, the gap width of collector unit 21 changes.And according to the change of this gap width, the position of the peristome 27 of collector unit 21 changes, thereby might be difficult to install header cap 3a.To this, about this branch piece 9, for example, use metal-made elastic construction body, perhaps, also only the two sides of upper strata and lower floor consisted of by metal member and consisted of by the elastomeric material more springy of polyurethane (urethane) etc. about the intermediate layer.So, can utilize this elasticity to absorb the deflection etc. of heat-transfer pipe 4, when header cap 3a is installed, can easily carry out the contraposition with peristome 27.

In addition, the present invention is not limited to the respective embodiments described above, can implement with various forms.

For example, in the respective embodiments described above, consist of abreast branch piece 9 with the collector unit 21 that becomes stratiform, it is held between heat-transfer pipe 4, even if but in the situation that do not exist this branch piece 9 also can guarantee high rate of heat exchange, also this branch piece 9 can be installed.

And, in above-mentioned embodiment, in the inboard that becomes circular outer tube 42, two inner tubes 41 are set, but can adopt various forms about the shape of this outer tube, the radical of inner tube.That is, make first fluid carry out heat exchange from inboard with the outside as long as constitute, can be any shape, radical.

[label declaration]

1 heat exchanger

2 collectors (2a: the first collector, 2b: the second collector)

3a, 3b header cap

4 heat-transfer pipes (41: inner tube, 42: outer tube)

8 gaps form member

9 branch pieces

21 collector unit

22 unit choristas

23 first walls

The 25a convex shaped part

25b concavity section

26 second walls (back)

41 inner tubes

42 outer tubes

The W clearance portion

Claims

1. heat exchanger, use has the heat-transfer pipe of outer tube and inner tube, carry out heat exchange between the first fluid in the gap of flow through outer tube and inner tube and the second fluid in the inner tube of flowing through, this heat exchanger is characterised in that, be provided with: the collector unit, the two ends of above-mentioned inner tube are extended from outer tube, and make above-mentioned first fluid be circulated to the gap of peripheral part and the outer tube of this extended inner tube; The second collector is circulated to from this extended inner tube in collector unit second fluid; And clearance portion, with so that be circulated between stacked collector unit from the second fluid of above-mentioned the second collector, and make from the second fluid of above-mentioned the second collector inside by inner tube, and also make second fluid from above-mentioned the second collector via above-mentioned clearance portion along the outer surface of direction of principal axis by outer tube.

2. heat exchanger, use has the heat-transfer pipe of outer tube and inner tube, carry out heat exchange between the first fluid in the gap of flow through outer tube and inner tube and the second fluid in the inner tube of flowing through, this heat exchanger is characterised in that, be provided with: the collector unit, this collector unit is kept near the end of outer tube by the first wall, and make from the extended inner tube of outer tube at the second wall relative with this first wall and extend, make above-mentioned first fluid be circulated to the gap of inner tube and outer tube in the space that is surrounded by this first wall and the second wall; The second collector makes second fluid be circulated to the second extended inner tube of wall from this collector unit; And clearance portion, second fluid from above-mentioned the second collector is circulated between stacked each collector unit, and make from the second fluid of above-mentioned the second collector inside by inner tube, and also make second fluid from above-mentioned the second collector via above-mentioned clearance portion along the outer surface of direction of principal axis by outer tube.

3. heat exchanger as claimed in claim 1 or 2, wherein, above-mentioned clearance portion is that the clamping gap forms member and forms between stacked collector unit and collector unit.

4. heat exchanger as claimed in claim 1 or 2, wherein, above-mentioned clearance portion is to utilize the convex shaped part that forms with the collector unit or concavity section and form.

5. heat exchanger as claimed in claim 1 or 2, wherein, between the heat-transfer pipe of above-mentioned collector unit and collector unit, be provided with so that the second fluid that flows into from above-mentioned clearance portion to the branch piece of heat-transfer pipe side branch.

6. heat exchanger as claimed in claim 1 or 2, wherein, between the heat-transfer pipe in above-mentioned collector unit and collector unit, be provided with contact with this heat-transfer pipe and with so that the second fluid that flows into from above-mentioned clearance portion to the branch piece of heat-transfer pipe side branch.