CN100362303C - Flat pipe comprising a return bend section and a heat exchanger constructed therewith - Google Patents
Flat pipe comprising a return bend section and a heat exchanger constructed therewith Download PDFInfo
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- CN100362303C CN100362303C CNB2004800044428A CN200480004442A CN100362303C CN 100362303 C CN100362303 C CN 100362303C CN B2004800044428 A CNB2004800044428 A CN B2004800044428A CN 200480004442 A CN200480004442 A CN 200480004442A CN 100362303 C CN100362303 C CN 100362303C
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- Prior art keywords
- flat
- pipeline section
- flat tube
- return bend
- bend part
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0475—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend
- F28D1/0476—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend the conduits having a non-circular cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
- F28D1/0478—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag the conduits having a non-circular cross-section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
- F28D2021/0073—Gas coolers
Abstract
The invention relates to a flat tube (1) comprising a return bend section (3), inside of which the flat tube (1) is bent back in such a manner that both planar tube sections (2a, 2b) thereof, which are connected to the return bend section, extend in a longitudinal direction with opposite flow-through directions (4a, 4b) and with longitudinal axes (5a, 5b) that are offset with regard to one another at least in the transverse direction (y). The invention provides that the return bend section (3) is formed in such a manner that a main bending axis (A) extends parallel to the flat tube plane and at a predeterminable angle to the tube longitudinal extension, whereby the flat tube plane is determined by the longitudinal and width extension of the flat tube (1).
Description
Technical field
The present invention relates to a kind of flat tube and a kind of by heat exchanger that it constituted.
Background technology
Patent publication DE 198 30 863 A1 have described a kind of flat tube and a kind of tube bundle that is made of this class flat tube that have the return bend part of the same type.In order to make this flat tube that has the return bend part, flat tube is bent so that extend longitudinally with two smooth pipeline sections that return bend partly links to each other, and opposite and their longitudinal axis of the flow direction in these two pipeline sections staggers at least in the horizontal mutually.
Patent publication EP 0 659 500 A1 have described a kind of flat tube and a kind of tube bundle that is made of this class flat tube that has the return bend part equally.In order to make this flat tube, at first a straight flat tube blank is bent to U-shaped, be parallel to each other up to the both wings of flat tube, subsequently the latter is partly reversed 90 ° with respect to return bend respectively.The flat tube of making in this way has two and is positioned at conplane flat pipeline section, and its port of export is positioned at the same side relative with the return bend part.Pass through another reverse part through a reverse part then again up to the top of return bend part, the flat tube transverse axis of return bend part and the angle between the plane, straight length place are increased to 90 ° from 0 ° and are reduced to 0 ° then again.The shortcoming of foregoing return bend part is, top in the return bend part, with the perpendicular direction on straight length plane on the expansion of flat tube always equal the flat tube width, even can not dwindle when needing, the size of corresponding like this, with it heat exchanger tube bundle can not have any variation on the direction vertical with the straight length plane.
Summary of the invention
The purpose of this invention is to provide a kind of flat tube that has return bend part, its making simple relatively and be suitable for constituting resistance to pressure good, take up an area of the little heat exchanger in space.Another object of the present invention provides the heat exchanger of being made by above-mentioned flat tube.
Main imagination of the present invention is, a return bend part forms in the following manner, its major bending axes and flat tube plane parallel, and by with the longitudinal extension direction of pipe between a predeterminable angle being become extend and the length of flat tube and width decision flat tube plane.In a preferred form of implementation, default angle is 90 °, that is to say that major bending axes is vertical with the longitudinal extension direction of pipe.
In the present invention, when flat tube forms the return bend part in distortion, displacement LAP s in the flat tube plane parallel, this section stroke s with the longitudinal extension direction of pipe be between the flat pipeline section of flat tube width b and distortion back required interval apart from the d sum.
For flat tube of the present invention, when it was out of shape, the angle [alpha] that is carried out the transition to return bend part by flat pipeline section can freely be selected, and in a preferred implementing form of the present invention, and angular range is 13 °＜α＜67 °.
In a preferred implementing form of flat tube of the present invention, angle [alpha] and/or stroke s are by realizing perpendicular at least one bending operation of the bending axis on flat tube plane around at least one.
In a particularly preferred form of implementation of flat tube of the present invention, the displacement of flat tube is to finish by two bending operations around two bending axis, these two operations were being carried out before or after the principal curvature operation of first bending axis, here, the length in dislocation district roughly is equivalent to the twice of return bend part.Particularly preferably be, the principal curvature operation is carried out round a major bending axes perpendicular to the length of pipe.
In above-mentioned illustrated flat tube of the present invention, two straight flat pipeline sections that partly link to each other with return bend after the distortion operation, be located at stagger mutually on the side and the parallel plane of vertically stacked direction z in, the distance, d of preferably being separated by on horizontal y, its scope is that 0.2mm is to 20mm.When using as shown in the figure a flat tube, if the direction of dislocation all changes, so then formed the tube bundle of a serpentine configuration when each baffling, in this structure, snakelikely stagger in the side.The degree of depth of formed like this tube bundle be equivalent to twice flat tube width add between the said flat pipeline section in front apart from d.If repeatedly dislocation is crooked on same direction for flat tube, so for each return bend part, the tube bundle degree of depth just is equivalent to the lateral separation d that the flat tube width adds the said flat pipeline section in front.Because this lateral separation, just form a corresponding gap between the flat pipeline section in the tube bundle that above-mentioned flat tube constitutes, it makes the separation of condensed water become easily, for example, when tube bundle is used for evaporimeter on the air conditioning equipment of car.
In order to make flat tube be positioned at same plane, return bend partly further is out of shape by a distortion operation, make that two pipeline sections are parallel side by side and be positioned at same plane and be spaced apart d.This can realize by a symmetry or the asymmetrical distortion of return bend part.
Be positioned at the partly replacement between (below be called the second return bend part) of return bend that conplane return bend part (below be called the first return bend part) and flat tube be positioned at Different Plane by the flat tube section, just formed the tube bundle of the structure of crawling, its degree of depth depends on the quantity of first return bend part that successively forms.By the continuous replacement of first and second return bends parts, and its dislocation direction equally also is opposite, and like this, the tube bundle of a serpentine configuration just can form, and its degree of depth to be twice flat tube width add between the said flat pipeline section in front apart from d.In this tube bundle, adjusting medium such as cold-producing medium or cooling fluid at first flow through and are positioned at conplane flat pipeline section, and then are positioned at next conplane flat pipeline section along stacked direction or flow through opposite with stacked direction.
In addition, can also realize serpentine configuration in the following manner: for example along stacked direction be provided with some, second return bend part (hereinafter being called the 3rd return bend part) that misplaces do not appear in the side, then form one first return bend part, what be attached thereto then is the second return bend part of some.Can certainly partly replace the first return bend part with one second return bend.In a kind of like this tube bundle, the adjusting medium at first flows through all forwardly promptly distinguishes stacked flat pipeline section in the zone down with the wind, then flowing through the flat pipeline section that all are positioned at Background Region again through after one first or second return bend part, here, the order of flowing through also can be opposite, promptly regulates medium and at first flows through Background Region and then flow through front area, in this course, according to operating position, the direction of flowing through can be from top to bottom or from the bottom up.
In another forming process of return bend part, the principal curvature operation is round carrying out with the angled major bending axes of the longitudinal extension of pipe, wherein, this angle that can be scheduled to is substantially equal to angle [alpha], carries out the transition to the return bend part by the flat pipeline section of this angle.After the principal curvature operation, two flat tube sections are arranged in two planes that are parallel to each other, and become the angle that size is 2 α between these two flat pipeline sections.For the pipeline section that obtains being parallel to each other, again by a bending operation, with two pipeline section distortion, so that they carry out the transition to the return bend part with angle [alpha] respectively round the bending axis on vertical flat tube plane.Process as described herein makes flat tube described, necessary dislocation before occur in a different manner.
These two flat pipeline sections are side by side parallel to be positioned at same plane in order to make, and both distances are d, can further adopt and similar deforming step noted earlier.As previously mentioned, this can realize by return bend partly being carried out symmetry or asymmetrical distortion.
In principle also can be with the reversed order of deforming step, and by symmetry or asymmetrical deformation to the return bend part, two pipeline sections are out of shape in the following manner: at first make two pipeline sections in same plane and the angle between them be 2 α, carry out foregoing two bending operations then, make that two pipeline sections are parallel side by side, and both distances in same plane are d.
The structure of return bend part of the present invention makes its elongation on stacked direction be significantly less than the flat tube width.Therefore, in the tube bundle of a stacked structure, the gap between the adjacent flat pipe is not very big or is not more than the flat tube width that but narrower significantly, this helps making a compactness and the good heat exchanger of resistance to pressure on the contrary.In addition, the return bend part also realizes by simple relatively canal curvature operation.In this course, one or many bending flat pipe in this way, like this, if the dislocation on the side is always on same direction, the elongation of flat tube on depth direction so, promptly defined elongation is transversely then strengthened by each bending along the front.Like this, formed one by relative narrower, flat tube that resistance to pressure is good and had any degree of depth, i.e. the tube bundle of elongation in the horizontal, here, laterally or depth direction be meant the direction that medium to be cooled or heating skims over the flat tube surface and passes heat exchanger.In this case, usually arrange again between the pipeline section that is arranged in order along stacked direction that thermofin is to improve heat transfer efficiency.Because the gap as previously mentioned between the pipe can be very little, so just can adopt highly also corresponding low heat transfer Wavelike finned, this can improve the compactedness and the stability of the pipe type core body that forms by this way equally.
In order to make a kind of flat tube heat exchangers that is used for air conditioning equipment of car, some flat tubes of the present invention be become a tube bundle along stacked direction z is overlapped here.Each end of flat tube is linked in the collection flow channels that is arranged in the side, extends along the stacked direction of tube bundle, wherein, two can form a snakelike pipeline section along stacked direction z by in the interconnective pipeline section of return bend part at least one, and, these two flat tube ends are positioned at the same side or relative both sides, in two tube ends at least one can be reversed, and windup-degree is 0 ° to 90 °.
Turn to by flat tube of the present invention 180 ° on flow direction, can in littler structure space, realize heat exchanger, because can become littler at the interval and/or the interval between each pipe of stacked direction like this as gas cooler or evaporimeter and so on.Can also avoid the strain of flat pipeline section in addition substantially.Another advantage is, the heat exchanger of being made by flat tube of the present invention has stable structure and the margin of tolerance is littler.
In the gas cooler distressed structure here, cold-producing medium becomes to intersect the mode of convection current with air and flows in a flat tube.180 ° baffling has appearred in the core body end that is positioned at the opposite, that is to say, flat tube returns along the route that goes in identical plane, but backhaul with remove the journey LAP s that staggers in the side, flat tube goes the distance, d of just being separated by between journey section and the backhaul section like this.These two flat tube sections are positioned at same plane, and decision is extended by the longitudinal extension and the width of the straightway of flat tube in this plane.Shaping is preferably divisible into three steps and carries out.In first step, flat tube begins to occur misplacing in the side from deployed condition.The dislocation big or small s equal flat tube width b with apart from the d sum.Then, carry out bending round the major bending axes A with flat tube plane parallel and vertical and length of tube direction, bending radius is r, and wherein r is crooked inside radius.Major bending axes roughly is positioned at the central authorities in dislocation district.Each of flat tube section is in the Different Plane that is parallel to each other with that.In the 3rd step, return bend partly is bent shaping, so that each flat pipeline section is in again in the same plane.Return bend after shaping part both can be lower than fully and also exceeded aforesaid this common plane fully, perhaps with respect to this common plane symmetry.In addition, return bend part also can be positioned on any asymmetrical position with respect to this common plane.As to the substituting of described shaping order, forming step also can reverse.
For the dislocation of flat tube in the plane, following geometrical relationship can be arranged: in the dislocation district, flat tube is drawn by following formula with respect to the angle α of original length of tube direction institute deviation: α=arctan (b+d/U), wherein, b is the flat tube width, and d is the distance between flat tube, and U is a skew range.
Skew range U can estimate with following formula: U=2 ∏ r, wherein, r is the inside radius of 180 ° of camber lines.For maximum inside radius, then be suitable for: (h
r-d
FR)/2, wherein, h
rBe fin height, d
FRBe flat tube thickness.Thereby draw flat tube thickness d as the reasonable lower limit of r minimum of a value (min)
FRAccording to these formula, the reasonable value of angle α is positioned at the scope of 13 °＜α＜67 °.
In a form of implementation with advantage, flat tube of the present invention forms a snakelike flat tube in the following manner: at least one in two flat pipeline sections that partly connect by a return bend curved coiled pipe on stacked direction, that is to say that it partly is with corresponding smooth pipeline section to form by the 3rd return bend that is arranged in order along stacked direction.Utilize the flat tube that is shaped like this, the snakelike tube bundle that is arranged in order along depth direction of any amount has constituted a so-called snakelike heat exchanger.
In another form of implementation of flat tube, the flat tube end is positioned at the same side or relative both sides, wherein, at least one end, preferably two ends are reversed with respect to the middle section that is connected.Reverse by this, rotate on the stacked direction at the flat tube transverse axis on the end direction, the elongation in the horizontal of flat tube end just can be less than the flat tube width like this.The maximum angle that reverses is 90 °, and like this, for the flat segments perpendicular to stacked direction, pipe end just becomes parallel with stacked direction, and its extension in the horizontal just only equals flat tube thickness.Like this, formed quite narrow layout, and correspondingly with it be the afflux that extends along stacked direction in relevant tube bundle side and distribute passage along the depth direction of the tube bundle that constitutes by above-mentioned flat tube.
The characteristics of the heat exchanger here are that a corresponding tube bundle structure is used one or more flat tubes of the present invention, and have the characteristic and the advantage of the mentioned this tube bundle structure in front.Particularly, can make in this way that a kind of compactness, resistance to pressure are good, weight is relatively light, internal capacity is little and have the evaporimeter of good condensed water separation function, this evaporimeter is applicable to air conditioning equipment of car, and preferred employing here is the multicell flat tube.This heat exchanger both can be a single layer structure, in this structure, between two return bends part or the flat pipeline section between return bend part and the flat tube end constitute by straight pipeline section; It also can be a serpentine configuration, and flat pipeline section is bent to coiled pipe in this structure.
In a heat exchanger of further retrofiting, employed flat tube pipe end and corresponding with it afflux and distribution passage (for convenience's sake, hereinafter being called collection flow channels) are positioned on the relative tube bundle side.Collection flow channels can be formed by a manifold or header, and they are that the core body short transverse is extended in relevant tube bundle side along stacked direction, the adjusting medium that flows in pipe is flow in each flat tube or from each flat tube concurrently flow out.
In of the present invention another further retrofited, the flat tube end all was positioned at the same side of tube bundle.Because the structure of flat tube, two pipe ends of each flat tube stagger along the core body depth direction, and are corresponding with them like this, just can arrange two accordingly along core body depth direction collection flow channels side by side.Corresponding with it, the adjusting medium that flows in pipe flows in the same side of heat exchanger and flows out.
This class same core body side have two side by side the heat exchanger of collection flow channels also have other structure, in this structure, collection flow channels is by two independent headers or manifold (for convenience's sake, hereinafter being called header) or a common header formation.The latter realizes in the following manner: one is initially single header inner chamber and is divided into two collection flow channels by a longitudinal baffle, perhaps flat tube by an extrusion modling, have two pipe profiles of separating and forming the cavity of collection flow channels mutually and make.
At one further in the heat exchanger of remodeling, at least one in two cavitys that at least one in two headers or header are formed by longitudinal subdivision is divided into some collection flow channels spaced apart from each other along the core body short transverse by lateral partitions.Like this, regulating medium passes through by first collection flow channels in laterally spaced header or the laterally spaced cavity, only flow in that part of flat tube that is linked in all flat tubes of tube bundle in this collection flow channels, in tube bundle, form the flat tube group of being crossed by the medium serial flow in this way.The collection flow channels that the other end inserted of above-mentioned that part of flat tube is then as the baffling passage,, regulates medium by being linked into herein flat tube baffling to another part flat tube here, and their end also is linked in this baffling passage.The quantity of lateral partitions and determining positions flat tube are divided into each group that is successively flow through, and the flat tube in every group is by medium concurrent flow mistake.
In the flat tube of making according to the present invention, be not subjected to the influence of return bend part on the flat tube with respect to the layout of air-flow, that is to say that the windward side of flat tube remains windward side after the return bend part, the leeward side of flat tube remains leeward side after the return bend part.
With top different be that the downside of pipe and upside can be subjected to the influence of return bend part, that is to say that the downside of flat tube becomes the upside of flat tube, and the upside of flat tube become the downside of flat tube.
Description of drawings
Below by accompanying drawing and preferred embodiment invention is elaborated.Wherein,
Fig. 1 is one and has the flat tube vertical view that return bend part and pipe end are reversed;
Fig. 2 a is the side view of direction shown in the arrow I in Fig. 1 of a flat tube that has second return bend part;
Fig. 2 b is the side view that has direction shown in the arrow I in Fig. 1 of flat tube of dissimilar first return bends part to 2d;
Fig. 3 a is the vertical view of a flat tube before the bending operation that is the center carries out with major bending axes A;
Fig. 3 b is the vertical view of a flat tube after the bending operation that is the center carries out with major bending axes A;
Fig. 4 is a partial side view by the heat exchanger pipe type core body that flat tube constituted shown in Fig. 1 and 2;
Fig. 5 is a partial side view that has the heat exchanger pipe type core body of snakelike flat tube.
The specific embodiment
Return bend part 3 can obtain in the following manner: straight flat tube desired thickness is b during beginning, along the flat tube in-plane displancement LAP s parallel with length of tube, this section stroke equals the width b of pipe and required interval d sum in the dislocation district U shown in Fig. 3 a for it.Displacement or dislocation both can also can be carried out along y direction opposite, that bear along positive y direction. Flat pipeline section 2a, 2b carry out the transition to return bend part 3 according to a predeterminable angle [alpha].Here, angle [alpha] and/or stroke s realize that by at least one bending operation bending operation is that carry out at the center with at least one bending axis B1, B2, and bending axis is then perpendicular to the flat tube plane.Stroke s of displacement as described herein preferably by being that two bending operations that carry out at the center are finished with two bending axis B1 among Fig. 3 a and B2, simultaneously, preferably carried out before the bending operation that with major bending axes A is the center by these two operations.Among the embodiment shown in the figure, major bending axes A is positioned at the center of dislocation district U, and the length of dislocation district U is roughly the twice of return bend part 3.
Can obtain two straight length 2a, 2b of flat tube 1 by the mode that has illustrated.After the dislocation and principal curvature operation of flat tube 1, these two straight length 2a, 2b stagger mutually shown in Fig. 2 a and are positioned at the plane that is parallel to each other, and the optional distance between the plane on the z direction is 2r, and the optional distance on the y direction is d, like this, and (h
r-d
FR)/2 item are maximum inside radius r, wherein, and h
rBe fin height, d
FRBe flat tube thickness.Can draw flat tube thickness d from following formula as the reasonable lower limit of r
FRAccording to these formula, the reasonable value of angle [alpha] occupy in the scope of 13 °＜α＜67 °.Optional distance preferably at about 0.2mm between the 20mm, typical flat tube width b then 1 between several centimetres.
As shown in Figure 2, according to the shape of return bend part 3, the height c of return bend part 3 is low, thereby the expansion on stacked direction z is little, and can select height according to bending radius.Particularly the height c of return bend part 3 is significantly less than flat tube width b.Like this, the some this flat tube in a heat exchanger tube bundle can be stacked together mutually, and stack height then can be significantly less than the flat tube width, as described in heat exchanger embodiment hereinafter.Another remodeling of flat tube among Fig. 1 and 2 can be that flat pipeline section 2a, the 2b of two shown in Fig. 2 a lays respectively in two x-y planes of staggering mutually.In this case, laterally y defines in the following manner, promptly it both perpendicular to vertical x of straight length also perpendicular to the stacked direction z of tube bundle.
Fig. 3 b has showed the possibility that return bend part 3 is shaped after the principal curvature operation.Shown in Fig. 3 b,, at first center on the principal curvature operation of bending axis A by before realizing dislocation around other bending operation of bending axis B3.Form an angle α between the longitudinal extension direction of major bending axes A and pipe, the scope at this angle is 13 °＜α＜67 °.After the principal curvature operation, two pipeline sections are by curving inwardly around bending axis B3 respectively shown in the arrow.Shown in Fig. 3 b, realize that by locating part among the embodiment shown in the figure, locating part is a positive stop strip that width is d apart from d between the flat tube, simultaneously, the upper end of this positive stop strip has constituted bending axis B3 again. Flat pipeline section 2a and 2b among the figure are arranged in the Different Plane that is parallel to each other, and the angle between the plane is 2 α.Shown in Fig. 2 a, after finishing other bending operation, be parallel to each other between these two flat pipeline section 2a and the 2b and be arranged in the Different Plane that is parallel to each other, so just can carry out the forming process that other had been described again, so that these two flat pipeline section 2a, 2b is parallel to each other and be spaced apart d and be in the same plane and (see that Fig. 2 b is to 2c).
Figure 4 and 5 have been showed the applicable cases of this class flat tube in the pipe type core body 9 of evaporimeter 10 shown in Fig. 1 and 2, and particularly the evaporimeter here can be applied to the air-conditioning equipment of automobile.Certainly, the localized heat interchanger that shows among the figure also can be according to being designed for other any heat exchange purpose, for example gas cooler.As shown in Figure 4, be one group of stacked, flat tube as illustrated in fig. 1 and 2 between the cover plate 11,12 at evaporimeter 10 two ends, arranging between the flat tube thermal conductivity good Wavelike finned 8.The height of heat transmission fin 8 is substantially equal to the height c of flat tube single-revolution elbow part 3, and is significantly less than flat tube width b.
By using the flat tube among Fig. 1 and 2, pipe type core body 9 is structurally along depth direction, and promptly the y direction is divided into two parts, and wherein, in each core body part, the pipeline section that has identical flow direction overlaps along stacked direction z respectively.The gap that between two straight length 2a, 2b having formed between two core bodys part with flat tube 1, equates apart from d.Among the embodiment shown in the figure, Wavelike finned 8 extend in whole flat tube depth bounds as complete parts, and cross the gap, and it can also be outstanding the front and back from the two sides of core body where necessary.Wavelike finned 8 also can be divided into a plurality of parts, particularly two parts.The core body front is meant, one is skimmed over second of evaporator surface outside and regulates medium such as air to be cooled, that be sent to railway carriage or compartment in the automobile, is that the core body depth direction head-on blows to it along the horizontal y of pipe.
Owing to reverse, the lateral length of flat tube mouth of pipe end is less than flat tube width b.This just make and two with it correspondence, in Fig. 4, do not show being connected of collection flow channels become easy.These two collection flow channels can be made of a manifold or header respectively, and the lateral length that it makes progress at y can be greater than flat tube width b, and, when the windup-degree of flat tube end is approximately 90 °, its lateral length even only slightly just on diametric(al) greater than flat tube thickness.So just two headers that extend along stacked direction z can be arranged side by side in relevant tube bundle side, to admit two ends of a flat tube 1 respectively.Also can select to admit pipe end 6a, the 6b that is stacked to two row with a common header, this header is separated into collection flow channels two necessity, independent by a longitudinal baffle.
Here as can be seen, the evaporimeter 10 that has an above-mentioned shape pipe type core body 9 not only compact conformation, resistance to pressure is good, and the heat exchanger effectiveness height.By flat tube being bent into two pipeline section 2a, 2b that stagger along the core body degree of depth, make the heat exchanger effectiveness that flat tube reaches of relative narrower, be equivalent to width in other cases and be at least its twice, the heat exchanger effectiveness that flat tube reached of bending not.Simultaneously, by the disposable bending to flat tube, make that the adjusting medium of percolation can flow in the same side of tube bundle and flow out in pipe, this has tangible advantage in some applications.
Among Fig. 5 the embodiment of a serpentine configuration.Can see some snakelike flat tubes 13 in Fig. 5, they are with stack together snakelike tube bundle among the formation figure of any needed quantity.Here employed snakelike flat tube flat tube structurally basic and among Fig. 1 and 2 is the same, its difference is, what connect with the both sides of return bend part 3 identical among Fig. 1 and 2 is not only the straight length of an individual layer, also have a snakelike pipeline section 12 that has repeatedly serpentine bend, they also are the opposed and suitable gaps that is separated by on the depth direction of core body.The serpentine bend part 12 of common snakelike pipeline section 13 is with flat tube round pipe transverse axis there crooked 180 ° and form on relevant position.Arranging the Wavelike finned 8 of good heat conductivity between each snakelike pipeline section 13 and the snakelike flat tube 12 that is arranged in order, they extend to the core body back side from the core body front always, and are projected into the height an of the best.Certainly here, also can be as the embodiment in the Figure 4 and 5, promptly two tube bundle row that stagger on the core body depth direction can have Wavelike finned row respectively, in this case, can keep the gap between two core body row.With this undaform fin can be divided into the structure of the identical two halves of width different be, in whole core body depth bounds, can dispose the Wavelike finned of any varying number and/or arrange the Wavelike finned of different in width in each undaform fin layer, for example, the undaform fin of first can account for 2/3rds of the core body degree of depth, and second portion then accounts for the residue 1/3rd of the core body degree of depth.In each case, the gap all helps the separation of condensed water.
From Figure 4 and 5 as can be seen, in this embodiment, in the stacked interval between Wavelike finned 8 height and the adjacent straight flat pipeline section, the snakelike the flat tube 13 and stacked interval between the adjacent snakelike flat tube 13 is significantly less than the height c of the return bend part 3 of flat tube width b.In this case, flat tube 13 ends that are positioned at core body the same side are reversed 90 ° and are not conflicted with less stack height, because in this case, each snakelike flat tube 13 since its snakelike pipeline section 12 and on the whole along the height of stacked direction z greater than the flat tube width.As previously mentioned, reversed in end 6 under 90 ° the situation, just can adopt narrower collection flow channels or form the header of collection flow channels.Can see that in Fig. 5 such one is positioned at positive header 7, a row flat tube end 6 that is arranged in the front then is linked into this pipe.In addition, as shown in Figure 5, snakelike flat tube 13 can be combined with the flat tube 1 among Fig. 1 and 2.
In addition, can also come two kinds of flat tube structures shown in the alternate figures with many other structures.For example, flat tube can have two or more return bend parts and corresponding baffling.
In addition, can also carry out following remodeling, promptly increase to few serpentine bend, make corresponding flat tube end 6 be positioned on the core body opposite side relative with return bend part 3 at one and/or another snakelike pipeline section to the snakelike flat tube among Fig. 5.And in another implemented structure, the flat tube 13 shown in Fig. 5 can have another or more return bend part 3, so that be tube bundle that is divided at least three parts along the core body depth direction of serpentine heat exchanger formation.Can flat tube end 6 not reversed according to operating position yet.
Be arranged in the embodiment of core body the same side in flat tube end 6, can not adopt two headers 7 or a header shared, that when making, pass through the longitudinal baffle interval, and being to use two chambers header, it has just had two independent, tubular wall extending therebetween in the production phase.It is made by the section bar of an extrusion modling, and inside has two mutual separated vertical cavitys, and they have formed the collection flow channels of associated heat exchanger.The same with other header structure, header 7 has matched groove, and flat tube end 6 is inserted in this groove hermetically.
According to the type of heat exchanger, also can adopt following header, promptly it is divided into some collection flow channels by corresponding lateral partitions on core body short transverse z.Like this, the flat tube in the tube bundle is divided into some groups, and wherein, the pipe in group is by parallel percolation, and different pipe groups is then by the serial percolation.The adjusting medium of an inflow flow into the one group of flat tube that links to each other with the there from a collection flow channels of inlet side, enters into a collection flow channels as the baffling chamber from the other end again then.Except first group of flat tube, also have second group of flat tube to be linked in this collection flow channels, regulate medium here by baffling.Locate arbitrarily in one or two header by lateral partitions, this flow process can go on always, up to the collection flow channels that arrives outlet side, regulates medium then by flowing out tube bundle here.
Above-mentioned description to different embodiment shows, utilizes the flat tube among the present invention can produce the single layer structure very compact, that resistance to pressure is good, heat output is high or the flat tube bundle of serpentine configuration.By its heat exchanger of making be applicable to operating pressure relatively very high, on automobile, use CO more and more widely
2Air-conditioning equipment.
Claims (35)
1. the flat tube (1) that has return bend part (3), wherein, flat tube (1) is bent so that two smooth pipeline section (2a that partly link to each other with return bend, 2b) extend longitudinally, opposite and their the longitudinal axis (5a of flow direction in these two pipeline sections, 5b) laterally staggering mutually on (y) at least, it is characterized in that, this return bend part (3) forms in the following manner, its major bending axes (A) and flat tube plane parallel, and by with the longitudinal extension direction of pipe between one first predetermined angle being become extend, and the length of flat tube (1) and width have determined the flat tube plane.
2. flat tube according to claim 1 is characterized in that, this first predetermined angle is 90 °.
3. flat tube according to claim 1 and 2 is characterized in that, the flat tube (1) in return bend part (3) zone, displacement LAP (s) in the flat tube plane parallel with the longitudinal extension direction of pipe.
4. flat tube according to claim 3 is characterized in that, flat pipeline section (2a, 2b) carries out the transition to return bend part (3) by one second predetermined angle (α).
5. flat tube according to claim 3 is characterized in that, second predetermined angle (α) and/or stroke (s) are to realize by at least one bending operation around at least one bending axis perpendicular to the flat tube plane (B).
6. flat tube according to claim 4 is characterized in that, second predetermined angle (α) and/or stroke (s) are to realize by at least one bending operation around at least one bending axis perpendicular to the flat tube plane (B).
7. flat tube according to claim 6, it is characterized in that, the displacement of flat tube (1) is to finish by two bending operations around two bending axis (B1, B2), these two operations were being carried out before or after the principal curvature operation of major bending axes (A), and major bending axes (A) is positioned at the central authorities in dislocation district (U).
8. according to claim 1 or 2 or 4 or 5 or 6 or 7 described flat tubes, it is characterized in that, two smooth pipeline sections (2a, 2b) that link to each other with return bend part (3) be arranged in be parallel to each other and with the vertical plane of stacked direction (z), and exist apart from (d) in the horizontal between the pipeline section.
9. flat tube according to claim 3, it is characterized in that, two smooth pipeline sections (2a, 2b) that link to each other with return bend part (3) be arranged in be parallel to each other and with the vertical plane of stacked direction (z), and exist apart from (d) in the horizontal between the pipeline section.
10. according to claim 1 or 2 or 4 or 5 or 6 or 7 or 9 described flat tubes, it is characterized in that, return bend part (3) further is out of shape by a distortion operation, makes two pipeline sections (2a, 2b) be positioned at same plane side by side abreast and exist apart from (d) in the horizontal each other.
11. flat tube according to claim 3, it is characterized in that, return bend part (3) further is out of shape by a distortion operation, makes two pipeline sections (2a, 2b) be positioned at same plane side by side abreast and exist apart from (d) in the horizontal each other.
12. flat tube according to claim 8, it is characterized in that, return bend part (3) further is out of shape by a distortion operation, makes two pipeline sections (2a, 2b) be positioned at same plane side by side abreast and exist apart from (d) in the horizontal each other.
13. flat tube according to claim 8 is characterized in that, return bend part (3) is by symmetry or distortion asymmetricly.
14. flat tube according to claim 9 is characterized in that, return bend part (3) is by symmetry or distortion asymmetricly.
15. flat tube according to claim 8 is characterized in that, the distance (d) on laterally (y) at 0.2mm between the 20mm.
16. according to claim 9 or 11 or 12 described flat tubes, it is characterized in that, the distance (d) on laterally (y) at 0.2mm between the 20mm.
17. flat tube according to claim 10 is characterized in that, the distance (d) on laterally (y) at 0.2mm between the 20mm.
18. according to claim 1 or 2 or 4 or 5 or 6 or 7 or 9 or 11 or 12 or 13 or 14 or 15 or 17 described flat tubes, it is characterized in that, by return bend part (3), the windward side of the first flat pipeline section (2a) becomes the windward side of the second flat pipeline section (2b), and the leeward side of the first flat pipeline section (2a) becomes the leeward side of the first flat pipeline section (2b).
19. flat tube according to claim 3, it is characterized in that, by return bend part (3), the windward side of the first flat pipeline section (2a) becomes the windward side of the second flat pipeline section (2b), and the leeward side of the first flat pipeline section (2a) becomes the leeward side of the first flat pipeline section (2b).
20. flat tube according to claim 8, it is characterized in that, by return bend part (3), the windward side of the first flat pipeline section (2a) becomes the windward side of the second flat pipeline section (2b), and the leeward side of the first flat pipeline section (2a) becomes the leeward side of the first flat pipeline section (2b).
21. flat tube according to claim 10, it is characterized in that, by return bend part (3), the windward side of the first flat pipeline section (2a) becomes the windward side of the second flat pipeline section (2b), and the leeward side of the first flat pipeline section (2a) becomes the leeward side of the first flat pipeline section (2b).
22. flat tube according to claim 16, it is characterized in that, by return bend part (3), the windward side of the first flat pipeline section (2a) becomes the windward side of the second flat pipeline section (2b), and the leeward side of the first flat pipeline section (2a) becomes the leeward side of the first flat pipeline section (2b).
23. according to claim 1 or 2 or 4 or 5 or 6 or 7 or 9 or 11 or 12 or 13 or 14 or 15 or 17 or 19 or 20 or 21 or 22 described flat tubes, it is characterized in that, by return bend part (3), the pipe downside of the first flat pipeline section (2a) becomes the pipe upside of the second flat pipeline section (2b), and the pipe upside of the first flat pipeline section (2a) becomes the pipe downside of the second flat pipeline section (2b).
24. flat tube according to claim 3, it is characterized in that, by return bend part (3), the pipe downside of the first flat pipeline section (2a) becomes the pipe upside of the second flat pipeline section (2b), and the pipe upside of the first flat pipeline section (2a) becomes the pipe downside of the second flat pipeline section (2b).
25. flat tube according to claim 8, it is characterized in that, by return bend part (3), the pipe downside of the first flat pipeline section (2a) becomes the pipe upside of the second flat pipeline section (2b), and the pipe upside of the first flat pipeline section (2a) becomes the pipe downside of the second flat pipeline section (2b).
26. flat tube according to claim 10, it is characterized in that, by return bend part (3), the pipe downside of the first flat pipeline section (2a) becomes the pipe upside of the second flat pipeline section (2b), and the pipe upside of the first flat pipeline section (2a) becomes the pipe downside of the second flat pipeline section (2b).
27. flat tube according to claim 16, it is characterized in that, by return bend part (3), the pipe downside of the first flat pipeline section (2a) becomes the pipe upside of the second flat pipeline section (2b), and the pipe upside of the first flat pipeline section (2a) becomes the pipe downside of the second flat pipeline section (2b).
28. flat tube according to claim 18, it is characterized in that, by return bend part (3), the pipe downside of the first flat pipeline section (2a) becomes the pipe upside of the second flat pipeline section (2b), and the pipe upside of the first flat pipeline section (2a) becomes the pipe downside of the second flat pipeline section (2b).
29. be used for the flat tube heat exchangers of air conditioning equipment of car, have a tube bundle (9), it is characterized in that this tube bundle (9) have one or more along stacked direction (z) overlapped, as described flat tube (1) one of in the claim 1 to 22.
30. flat tube heat exchangers according to claim 29 is characterized in that, the collection flow channels (7) of extending along stacked direction (z) in the side arrangement of tube bundle (9), an end (6) of flat tube (1) is linked into wherein.
31., it is characterized in that two by the snakelike pipeline section (12) along stacked direction (z) bending of at least one formation in return bend part (3) interconnective pipeline section (2a, 2b) according to claim 29 or 30 described flat tube heat exchangers.
32., it is characterized in that two flat tube ends (6) are positioned at the same side or relative both sides according to claim 29 or 30 described flat tube heat exchangers, and in two pipe ends (6a, 6b) at least one reversed, windup-degree is 0 ° to 90 °.
33. flat tube heat exchangers according to claim 31 is characterized in that, two flat tube ends (6) are positioned at the same side or relative both sides, and in two pipe ends (6a, 6b) at least one reversed, and windup-degree is 0 ° to 90 °.
34. a gas cooler has according to described flat tube heat exchangers (10) one of in the claim 29 to 33.
35. an evaporimeter has according to described flat tube heat exchangers (10) one of in the claim 29 to 33.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10306848A DE10306848A1 (en) | 2003-02-18 | 2003-02-18 | Flat tube with bend section forming heat exchanger for gas cooler or evaporator has bent over section with main bend axis parallel to flat tube plane and at definable angle to pipe length |
| DE10306848.1 | 2003-02-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1751216A CN1751216A (en) | 2006-03-22 |
| CN100362303C true CN100362303C (en) | 2008-01-16 |
Family
ID=32747996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800044428A Expired - Fee Related CN100362303C (en) | 2003-02-18 | 2004-02-11 | Flat pipe comprising a return bend section and a heat exchanger constructed therewith |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20060243432A1 (en) |
| EP (1) | EP1597529B1 (en) |
| JP (1) | JP2006518029A (en) |
| CN (1) | CN100362303C (en) |
| AT (1) | ATE366905T1 (en) |
| BR (1) | BRPI0407582A (en) |
| DE (2) | DE10306848A1 (en) |
| WO (1) | WO2004074756A2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006018688B4 (en) * | 2006-04-13 | 2009-08-27 | Visteon Global Technologies Inc., Van Buren | Method for bending multiport tubes for heat exchangers |
| US20080302518A1 (en) * | 2007-06-07 | 2008-12-11 | Joseph Durdel | Flat tube heat exchanger |
| WO2010072221A2 (en) * | 2008-12-23 | 2010-07-01 | Noise Limit Aps | Cooling device with bended flat tube and related manufacturing method |
| DK2218978T3 (en) * | 2009-02-17 | 2011-08-01 | Cockerill Maintenance & Ingenierie | Tab Exchanger |
| CN101850391B (en) * | 2009-03-31 | 2012-07-04 | 三花丹佛斯（杭州）微通道换热器有限公司 | Flat pipe processing method, flat pipe, heat exchanger processing method and heat exchanger |
| DE102009047620C5 (en) * | 2009-12-08 | 2023-01-19 | Hanon Systems | Heat exchanger with tube bundle |
| CN101846465B (en) * | 2010-04-13 | 2011-11-09 | 三花丹佛斯（杭州）微通道换热器有限公司 | Heat exchanger |
| CN101936672B (en) * | 2010-09-15 | 2012-09-19 | 三花控股集团有限公司 | Heat exchanger with improved surface airflow field distribution uniformity |
| CN201945091U (en) * | 2010-11-18 | 2011-08-24 | 三花丹佛斯（杭州）微通道换热器有限公司 | Heat exchanger |
| CN103644685A (en) * | 2013-12-26 | 2014-03-19 | 杭州三花微通道换热器有限公司 | Heat exchanger and air conditioner with multiple refrigeration systems provided with heat exchanger |
| CN107000007B (en) * | 2014-11-25 | 2019-10-01 | 萨帕股份公司 | Porous mouth extruded tube design |
| US20160363387A1 (en) * | 2015-06-12 | 2016-12-15 | Hamilton Sundstrand Space Systems International, Inc. | Phase-change material heat exchanger |
| CN113654394A (en) * | 2021-08-05 | 2021-11-16 | 浙江酷灵信息技术有限公司 | Heat exchanger |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3750709A (en) * | 1970-05-18 | 1973-08-07 | Noranda Metal Ind | Heat-exchange tubing and method of making it |
| JPH04187990A (en) * | 1990-11-22 | 1992-07-06 | Showa Alum Corp | Heat exchanging device |
| CN1107221A (en) * | 1993-11-24 | 1995-08-23 | 昭和铝株式会社 | Heat exchanger |
| WO2000003190A1 (en) * | 1998-07-10 | 2000-01-20 | Ford-Werke Aktiengesellschaft | Flat tube with transversally offset u-bend section and heat exchanger configured using same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1272091B (en) * | 1993-12-20 | 1997-06-11 | Borletti Climatizzazione | PROCEDURE FOR BENDING AN OBLONG CROSS-SECTION TUBE AND HEAT EXCHANGER WITH U-SHAPED U-SHAPED TUBES |
| US20030102113A1 (en) * | 2001-11-30 | 2003-06-05 | Stephen Memory | Heat exchanger for providing supercritical cooling of a working fluid in a transcritical cooling cycle |
-
2003
- 2003-02-18 DE DE10306848A patent/DE10306848A1/en not_active Withdrawn
-
2004
- 2004-02-11 DE DE502004004288T patent/DE502004004288D1/en not_active Expired - Lifetime
- 2004-02-11 CN CNB2004800044428A patent/CN100362303C/en not_active Expired - Fee Related
- 2004-02-11 BR BRPI0407582-0A patent/BRPI0407582A/en not_active IP Right Cessation
- 2004-02-11 JP JP2006501805A patent/JP2006518029A/en active Pending
- 2004-02-11 AT AT04710027T patent/ATE366905T1/en not_active IP Right Cessation
- 2004-02-11 EP EP04710027A patent/EP1597529B1/en not_active Expired - Lifetime
- 2004-02-11 WO PCT/EP2004/001257 patent/WO2004074756A2/en active IP Right Grant
- 2004-02-11 US US10/545,889 patent/US20060243432A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3750709A (en) * | 1970-05-18 | 1973-08-07 | Noranda Metal Ind | Heat-exchange tubing and method of making it |
| JPH04187990A (en) * | 1990-11-22 | 1992-07-06 | Showa Alum Corp | Heat exchanging device |
| CN1107221A (en) * | 1993-11-24 | 1995-08-23 | 昭和铝株式会社 | Heat exchanger |
| WO2000003190A1 (en) * | 1998-07-10 | 2000-01-20 | Ford-Werke Aktiengesellschaft | Flat tube with transversally offset u-bend section and heat exchanger configured using same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1597529B1 (en) | 2007-07-11 |
| JP2006518029A (en) | 2006-08-03 |
| US20060243432A1 (en) | 2006-11-02 |
| DE502004004288D1 (en) | 2007-08-23 |
| WO2004074756A2 (en) | 2004-09-02 |
| EP1597529A2 (en) | 2005-11-23 |
| BRPI0407582A (en) | 2006-02-14 |
| CN1751216A (en) | 2006-03-22 |
| ATE366905T1 (en) | 2007-08-15 |
| DE10306848A1 (en) | 2004-08-26 |
| WO2004074756A3 (en) | 2004-10-21 |
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