CN1135358C - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
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- CN1135358C CN1135358C CNB981001335A CN98100133A CN1135358C CN 1135358 C CN1135358 C CN 1135358C CN B981001335 A CNB981001335 A CN B981001335A CN 98100133 A CN98100133 A CN 98100133A CN 1135358 C CN1135358 C CN 1135358C
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- fin
- heat exchanger
- bent sheet
- otch
- finned tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
- F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Details Of Fluid Heaters (AREA)
Abstract
A heat exchanger is provided with finned tubes each fabricated by attaching fins to a tube. Radial slits are formed in a peripheral portion of the fin to divide the peripheral portion into a plurality of segments. A portion of each of the segments is bent in an axial direction of the finned tube along a bending line extending from a point on the radial slit to form a plurality of bent portions.
Description
The present invention relates to make tube fluid to flow through in the finned tube that periphery is installed with fin and extratubal fluid is flow through outside this pipe, carry out the heat exchanger of heat exchange by this finned tube.
Common heat exchanger, be in heat exchanger, to set a plurality of heat-transfer pipes, tube fluid resemble the cooling water is flowed through in the heat-transfer pipe, the extratubal fluid that for example resembles the fluid that is cooled is flowed outside this heat-transfer pipe along the direction of intersecting with heat-transfer pipe, carry out heat exchange between fluid in heat-transfer pipe and the fluid outside the heat-transfer pipe.
Amass in order to increase the outer heat-transfer area of pipe, increase the heat exchange amount of every heat-transfer pipe, the heat-transfer pipe of above-mentioned heat exchanger adopts finned tube.Figure 33 is to use the sectional drawing of the heat exchanger of above-mentioned finned tube, setting a plurality of finned tubes that are parallel to each other 1 in this heat exchanger, extratubal fluid is outer mobile at pipe along the direction of intersecting with heat-transfer pipe 1 axis as shown by arrows, and other tube fluid is flowing in finned tube 1.
The shape of above-mentioned finned tube 1 extensively adopts the serrated fin pipe shown in the full wafer shape finned tube shown in Figure 34 a, Figure 34 b or Figure 35 a, Figure 35 b.Wherein, the arrow among Figure 34 a to Figure 35 b, same with the arrow among Figure 33, the flow direction (among following Figure 36 to Figure 38 b too) of expression extratubal fluid.
Above-mentioned full wafer shape finned tube is installed with fin 3 in the periphery of managing 2.The fin 3 of serrated fin pipe is to make the radial rectangular fin that is called section 4.Above-mentioned serrated fin pipe is littler than the heat transfer area of the full wafer shape finned tube of same size, but owing to become zigzag, the temperature environment layer of fin surface is suppressed, manage outer heet transfer rate than full wafer shape finned tube height, equate with the full wafer finned tube or bigger by the product representation absorption heat of heat transfer area and the outer heet transfer rate of pipe.Therefore, adopt above-mentioned finned tube respectively according to different purposes.
As previously mentioned, extratubal fluid is shown in arrow among the figure, and a direction of intersecting from the axle with finned tube flows into, and flows between fin 3, by fin surface with manage 2 surface and tube fluid and carry out heat exchange.By the heat exchanger that such finned tube constitutes, compare with the heat exchanger that constitutes with the pipe that does not have fin, under the situation of having stipulated heat-shift, can reduce the radical of pipe, realize miniaturization.Under the situation of having stipulated the pipe radical, can increase exchange capacity.
But as shown in figure 36, the streamline of the extratubal fluid around full wafer shape finned tube, the extratubal fluid that the direction of arrow flows into from figure flowing between fin separated with the α angle from bending the position of the angle θ of beginning, forms back basin β at the finned tube downstream side.At this back basin β, the flow velocity of extratubal fluid is almost 0 or be adverse current, and the outer transport of local pipe becomes very little value.Therefore, the fin that is positioned at this basin, back β conducts heat hardly, and can not bring into play because of fin is set increases the effect of heat transfer area.In addition, even fin shape is a zigzag, the formation state of above-mentioned back basin β is also identical with full wafer shape finned tube, so, the part of not bringing into play heat transfer effect is arranged in the fin.
In order to suppress the separation of this pipe outflow, improve to manage outer heet transfer rate, for example as the Japanese patent gazette spy opens clear 56-165897 number record, the prevention body is installed in the oblique rear position that produces the finned tube that separates.Promptly, in the above-mentioned communique, above-mentioned prevention body is such shown in Figure 37 a and Figure 37 b, the plate 5 of proper width is set, perhaps such shown in Figure 38 a and Figure 38 b, periphery at fin 3 is provided with bent sheet 6, makes the extratubal fluid that will separate move into the downstream side of finned tube with such prevention body, improves the outer heet transfer rate of pipe.
But, change because separation point position and back basin formation state are kind, temperature, pressure and flow velocitys because of extratubal fluid, so, stop body position, range L or height h are set must be corresponding with above-mentioned extratubal fluid condition.
Therefore, the prevention plate shown in above-mentioned Figure 37 a and Figure 37 b by changing the width as the plate 5 that stops body, is provided with the scope correspondence though can make, and the prevention body shown in Figure 38 a and Figure 38 b, its height h usually are subjected to the restriction of the size of fin etc.At the position that is provided with of this prevention body, stop body to stop up stream between fin, under the big situation of the scope that is provided with, can not ignore the pressure loss that the obstruction because of fin gap stream causes increases.And, cause weight to increase because of having added the prevention body.In addition, when bent sheet 6 is set, determined the bending range L after, according to its geometry, its kink height h is also determined.
Like this, in method before, be the most important shape factor that the killer tube outflow separates, the size that promptly stops body that scope and prevention body are set is difficult to suitably set.Therefore, can not get best back stream and suppress effect.
The present invention makes in view of the above problems, and the heat exchanger that provides a kind of heat transfer property high is provided its purpose.In this heat exchanger, in the fin periphery the high prevention body of freedom shape is set according to the condition of extratubal fluid, the separation of killer tube outflow, the back basin of reducing the finned tube downstream side is improved the part outer heat of pipe in basin, back and is passed rate, obtains enlarging the effect of heat transfer area.
In order to achieve the above object, the present invention takes following technical scheme:
A kind of heat exchanger, have the finned tube that constitutes by the fin of managing and be installed in this pipe periphery, the axis of this finned tube intersects with the flow direction of extratubal fluid, it is characterized in that, the fin of above-mentioned finned tube has the some bent sheet that are formed on its peripheral part, the fin peripheral part that these bent sheet are, will be cut apart by some otch of managing side the outer Zhou Dynasty of fin, along the folding line that a bit extends from otch, towards with the direction bending of the surperficial approximate vertical of fin and form.Described heat exchanger is characterized in that, above-mentioned folding line be on the otch a bit with the fin periphery on any line.
Described heat exchanger is characterized in that, above-mentioned folding line be on the otch a bit with adjacent cut on any line.
Described heat exchanger is characterized in that, on the above-mentioned otch a bit with adjacent cut on be not on the concentric circles at center with the tubular axis heart.
Described heat exchanger is characterized in that, on the above-mentioned otch a bit with adjacent cut on be on the concentric circles at center with the tubular axis heart a bit.
Described heat exchanger is characterized in that, each bent sheet is that the fin peripheral part of being cut apart by otch is formed towards same direction bending.
Described heat exchanger is characterized in that, each bent sheet is that the Zhou Fangxiang of the fin peripheral part of being cut apart by otch at fin alternately formed towards the different directions bending.
Described heat exchanger is characterized in that, each bent sheet is that the Zhou Fangxiang of the fin peripheral part of being cut apart by otch at fin alternately formed towards the bending of contrary direction.
Described heat exchanger is characterized in that, each bent sheet is that the Zhou Fangxiang of the fin peripheral part of being cut apart by otch at fin alternately formed towards the bending of contrary direction.
Described heat exchanger is characterized in that, each bent sheet is that the Zhou Fangxiang of the fin peripheral part of being cut apart by otch at fin alternately formed towards the bending of contrary direction.
Described heat exchanger is characterized in that, each bent sheet is that the fin peripheral part of being cut apart by otch is formed in the bending in the Zhou Fangxiang interval of fin.
Described heat exchanger is characterized in that, each bent sheet is that the fin peripheral part of being cut apart by otch is formed in the bending in the Zhou Fangxiang interval of fin.
Described heat exchanger is characterized in that, each bent sheet is that the fin peripheral part of being cut apart by otch is formed in the bending in the Zhou Fangxiang interval of fin.
Described heat exchanger is characterized in that, each bent sheet is the fin peripheral part of being cut apart by otch in the same direction, and form in the bending in the Zhou Fangxiang interval of fin.
Described heat exchanger is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
Described heat exchanger is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
Described heat exchanger is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
Described heat exchanger is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
Described heat exchanger is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
Described heat exchanger is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
The 1st invention is a kind of heat exchanger, has the finned tube that is made of the fin of managing and be installed in this pipe periphery, and the axis of this finned tube intersects with the flow direction of extratubal fluid; It is characterized in that, the fin of above-mentioned finned tube has the some bent sheet that are formed on its peripheral part, these bent sheet are to manage side from the outer Zhou Dynasty of fin to cut some otch, along the folding line that a bit extends from otch, will be formed towards the tube axis direction bending by the fin peripheral part that above-mentioned otch is cut apart.
The 2nd invention is in the 1st invention, it is characterized in that, above-mentioned folding line be on the otch a bit with the fin periphery on any line.
The 3rd invention is in the 1st invention, it is characterized in that, above-mentioned folding line be on the otch a bit with adjacent cut on any line.
The 4th invention is in the 3rd invention, it is characterized in that, on the above-mentioned otch a bit with adjacent cut on be not on the concentric circles at center with the tubular axis heart.
The 5th invention is in the 3rd invention, it is characterized in that, on the above-mentioned otch a bit with adjacent cut on be on the concentric circles at center with the tubular axis heart a bit.
The 6th invention is in the 1st invention, it is characterized in that, each bent sheet is that the fin peripheral part of being cut apart by otch is formed towards same direction bending.
The the 7th to the 10th invention is respectively in the 1st, the 2nd, the 3rd or the 5th invention, it is characterized in that, each bent sheet be a fin peripheral part of cutting apart by otch at the Zhou Fangxiang of fin alternately towards the different directions bending and form.
The the 11st to the 13rd invention is respectively in the 1st to the 3rd invention, it is characterized in that, each bent sheet is in the bending of the Zhou Fangxiang compartment of terrain of fin and form a fin peripheral part of being cut apart by otch.
The 14th invention is in the 5th invention, it is characterized in that, each bent sheet be the fin peripheral part of cutting apart by otch towards same direction, and form in the bending of the Zhou Fangxiang compartment of terrain of fin.
The the 15th to the 20th invention is respectively in the 1st, the 2nd, the 3rd, the 6th, the 7th or the 11st invention, it is characterized in that each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
Good effect of the present invention:
As mentioned above, among the present invention, the fin of finned tube, have the some bent sheet that are formed on its peripheral part, these bent sheet are to form like this, promptly, the circumferential tubes side is cut some otch outside fin, by these otch fin is cut apart the fin peripheral part,, the above-mentioned fin peripheral part that is separated by otch is formed towards the tube axis direction bending along the folding line that a bit extends from otch.Therefore, as the high above-mentioned bent sheet separation of killer tube outflow effectively of the freedom shape that stops body.Thereby, reduce the back basin that produces along with the separation of pipe outflow, improve the localized heat transport of finned tube downstream side, can obtain enlarging the effect of heat transfer area, can improve the outer heet transfer rate of average tube of whole finned tube, improve the heat transfer property of heat exchanger.
Following with reference to accompanying drawing, describe embodiments of the invention in detail:
Fig. 1 a is the sectional drawing of the present invention's the 1st embodiment finned tube.
Fig. 1 b is the side view of the present invention's the 1st embodiment finned tube.
Fig. 2 is the further explanatory drawings of the kink among Fig. 1 a and Fig. 1 b.
Fig. 3 is the stereogram of the kink among Fig. 1 a and Fig. 1 b.
Fig. 4 is the extratubal fluid motion pattern around the present invention's the 1st embodiment finned tube.
Fig. 5 is the pipe unofficial biography thermal performance characteristics figure of heat exchanger of the present invention.
Fig. 6 is the sectional drawing that among expression the present invention the 1st embodiment bent sheet is arranged on the ad-hoc location example.
Fig. 7 a is the sectional drawing of the present invention's the 2nd embodiment finned tube.
Fig. 7 b is the side view of the present invention's the 2nd embodiment finned tube.
Fig. 8 is the stereogram of the kink among Fig. 7 a and Fig. 7 b.
Fig. 9 is the figure that in presentation graphs 7a and Fig. 7 b illustrated embodiment bent sheet is arranged on the ad-hoc location example.
Figure 10 a is the sectional drawing of the present invention's the 3rd embodiment finned tube.
Figure 10 b is the side view of the present invention's the 3rd embodiment finned tube.
Figure 11 is the figure that in Figure 10 a and Figure 10 b illustrated embodiment bent sheet is arranged on the ad-hoc location example.
Figure 12 a is the sectional drawing of the present invention's the 4th embodiment finned tube.
Figure 12 b is the side view of the present invention's the 4th embodiment finned tube.
Figure 13 is the stereogram of the bent sheet among Figure 12 a and Figure 12 b.
Figure 14 is the figure that among expression the present invention the 4th embodiment bent sheet is arranged on the ad-hoc location example.
Figure 15 a is the sectional drawing of the present invention's the 5th embodiment finned tube.
Figure 15 b is the side view of the present invention's the 5th embodiment finned tube.
Figure 16 is the figure that among expression the present invention the 5th embodiment bent sheet is arranged on the ad-hoc location example.
Figure 17 a is the sectional drawing of the present invention's the 6th embodiment finned tube.
Figure 17 b is the side view of the present invention's the 6th embodiment finned tube.
Figure 18 is the further explanatory drawings of the kink among Figure 17 a and Figure 17 b.
Figure 19 is the stereogram of the kink among Figure 17 a and Figure 17 b.
Figure 20 is the sectional drawing that among expression the present invention the 6th embodiment bent sheet is arranged on the ad-hoc location example.
Figure 21 a is the sectional drawing of the present invention's the 7th embodiment finned tube.
Figure 21 b is the side view of the present invention's the 7th embodiment finned tube.
Figure 22 is the further explanatory drawings of the kink among Figure 21 a and Figure 21 b.
Figure 23 is the stereogram of the kink among Figure 21 a and Figure 21 b.
Figure 24 is the stereogram of the inappropriate example of expression kink.
Figure 25 is the sectional drawing that among expression the present invention the 7th embodiment bent sheet is arranged on the ad-hoc location example.
Figure 26 a is the sectional drawing of the present invention's the 8th embodiment finned tube.
Figure 26 b is the side view of the present invention's the 8th embodiment finned tube.
Figure 27 is the stereogram of the kink among Figure 26 a and Figure 26 b.
Figure 28 is the sectional drawing that among expression the present invention the 8th embodiment bent sheet is arranged on the ad-hoc location example.
Figure 29 a is the sectional drawing of the present invention's the 9th embodiment finned tube.
Figure 29 b is the side view of the present invention's the 9th embodiment finned tube.
Figure 30 is the stereogram of the kink among Figure 29 a and Figure 29 b.
Figure 31 is the sectional drawing that among expression the present invention the 9th embodiment bent sheet is arranged on the ad-hoc location example.
Figure 32 is the sectional drawing of another embodiment of the present invention finned tube.
Figure 33 is the skiagraph of heat exchanger.
Figure 34 a is the sectional drawing of full wafer shape finned tube before.
Figure 34 b is the side view of full wafer shape finned tube before.
Figure 35 a is the sectional drawing of serrated fin pipe before.
Figure 35 b is the side view of tomahawk's serrated fin pipe before.
Figure 36 is a finned tube extratubal fluid motion pattern on every side before.
Figure 37 a is the sectional drawing of finned tube before
Figure 37 b is the side view of finned tube before.
Figure 38 a is the sectional drawing of another kind of finned tube before.
Figure 38 b is the side view of another kind of finned tube before.
Below, with reference to the description of drawings embodiments of the invention.
Fig. 1 a is the sectional drawing of the present invention's the 1st embodiment finned tube 10, and Fig. 1 b is its side view.Periphery at pipe 11 is provided with fin 12, constitutes finned tube 10.Arrow among Fig. 1 a and Figure 11 and above-mentioned Figure 33 similarly represent the flow direction (down together) of extratubal fluid.
At the peripheral part of fin 12, cut several (being 12 figure) otch 13 towards the axle center of finned tube 10 from the periphery of fin 12, the axis direction of fin peripheral part along following folding line towards pipe 11 of being cut apart by this otch 13 bends.
Fig. 2 is the figure that represents above-mentioned kink in detail.As mentioned above, at the peripheral part of fin 12, cut several otch 13 towards the axle center of finned tube 10 from the periphery of fin 12.Line of selecting the some b on a and fin 12 peripheries on above-mentioned otch 13 forms folding line 14, constitute slightly leg-of-mutton part by otch 13, folding line 14 and fin periphery, this slightly leg-of-mutton part as bent sheet 15 along folding line 14 perpendicular to the face of fin 12 be bent into rectangular-shaped.
Above-mentioned bent sheet 15 is in alternately bending round about of the Zhou Fangxiang of fin 12, and is alternately outstanding towards the table side or the dorsal part of fin 12.
Among Fig. 2,1 a on the otch 13 of formation folding line is the end points that adopts otch 13, but is not limited to end points, considers the length of otch 13 and the interval in fin gap etc., also can be at otch 13 point a ' midway.
To be bent by the fin peripheral part that this otch 13 is cut apart, the surface of bent sheet 15 fins 12 of triangle is outstanding to the fin peripheral part.The stereogram of the kink that is bent into by the fin peripheral part as shown in Figure 3.
Therefore, by suitably setting above-mentioned notch 13, can be as required respectively independently with the size of bent sheet 15 and be provided with set positions get the most suitable, its freedom shape height.
The finned tube 10 of Xing Chenging like this, with similarly before, its axis intersects with the flow direction of extratubal fluid, constitutes heat exchanger.The streamline of the extratubal fluid around the finned tube in the heat exchanger of Gou Chenging 10 as shown in Figure 4 like this.
That is, flow direction is because of managing 11 extratubal fluids of being partial to, because the effect of bent sheet 15, its flow direction changes to the back side of finned tube 10 with respect to the flow direction (direction of arrow) of extratubal fluid, raps around to the downstream side of finned tube 10 always.With before differently, form the basin, back hardly.Though flowing of extratubal fluid is different because of kind, the flow velocity of extratubal fluid from the size of managing 11 positions of separating and basin, back, but no matter under which kind of situation, because prominent bent sheet 15 of establishing incision and bending, so, compare with the pipe that does not have bent sheet 15, back basin can significantly reduce.
Therefore, as mentioned above, because the outer downstream side that flows to finned tube 10 of pipe flows into, so the flow velocity that is equivalent to the extratubal fluid of the fin downstream side at position, basin behind the finned tube before increases.The outer heet transfer rate of local pipe improves.That is, fin can conduct heat comprehensively, can obtain enlarging the effect of heat transfer area.Like this, compare with the upstream side of finned tube, can prevent the remarkable reduction of the outer heet transfer rate of part pipe of downstream side, the outer heet transfer rate of the average tube of whole finned tube improves greatly.
Fig. 5 represents the heat-transfer character figure of heat exchanger of the present invention and heat exchanger before (full wafer shape finned tube), and transverse axis is represented the asymptotic flow velocity of pipe outflow, and the longitudinal axis is represented the outer heet transfer rate of average tube.As can be seen from Figure, owing to use the finned tube with bent sheet 15, the outer heet transfer rate of its average tube also improves greatly.
Among this embodiment, because along the prominent bent sheet of establishing of the whole periphery of fin, so, be applicable to that also the outer flow velocity scope of use pipe is wide, the inconstant heat exchanger of formation state in the separation point position of extratubal fluid and basin, back.
In addition, the outer flow velocity scope of pipe is constant using, and under the constant situation of the formation state in the separation point position of extratubal fluid and basin, back, as shown in Figure 6, can produce the position specific tube outflow of otch 13 position of separation.At this moment similarly, flow through extratubal fluid between fin under the effect of bent sheet 15, pass back into i.e. before the back basin part of finned tube 10 downstream sides, can obtain effect same as described above.And, because required minimal projection, the pressure loss minimum that bent sheet 15 is caused only are set.
Fig. 7 a and Fig. 7 b are the sectional drawing and the side views of expression the present invention the 2nd embodiment finned tube 10.In the present embodiment, 13 at an otch forms a bent sheet 15.This bent sheet 15 alternately protrudes in the table side or the dorsal part of fin 12 in alternately bending in the opposite direction of the Zhou Fangxiang of fin 12.The stereogram of this kink as shown in Figure 8.
This situation also with the 1st embodiment similarly because the effect of bent sheet 15, the pipe outflow between the fin that separates in finned tube before passes back into the downstream side of finned tube 10 always, forms the basin, back hardly.Therefore, the flow velocity of finned tube downstream side increases, and the outer heet transfer rate of local pipe rises, and the outer heet transfer rate of the average tube of whole finned tube improves greatly.
In addition, in the above-described embodiments, be bent sheet 15 to be set, but also can be as illustrated in fig. 9 at the fin full periphery, bent sheet 15 is provided with that the position is specific to produce the position of separating in the pipe outflow.So similarly, the outflow of the pipe of 12 of the fins of flowing through is back to the back basin part before of finned tube downstream side under the effect of bent sheet 15, can obtain effect same as described above.
Figure 10 a and Figure 10 b are the sectional drawing and the side views of expression the present invention the 3rd embodiment finned tube 10.In the present embodiment, 15 of each bent sheet are towards 12 1 lateral bucklings of fin, and other structure and Fig. 7 a, Fig. 7 b, the 2nd embodiment shown in Figure 8 are identical.
This situation also with the 2nd embodiment similarly because the effect of bent sheet 15, the pipe outflow between the fin that separates in finned tube before passes back into the downstream side of finned tube 10 always, forms the basin, back hardly.Therefore, the flow velocity of finned tube downstream side increases, and the outer heet transfer rate of local pipe rises, and the outer heet transfer rate of the average tube of whole finned tube improves greatly.
In addition, in the above-described embodiments, be bent sheet 15 to be set, but also can be as illustrated in fig. 11 at the fin full periphery, bent sheet 15 is provided with that the position is specific to produce the position of separating in the pipe outflow.
Figure 12 a and Figure 12 b are the sectional drawing and the side views of expression the present invention the 4th embodiment finned tube 10.In the present embodiment, as one group of bending, each organizes bent sheet 15 in alternately bending in the opposite direction of fin Zhou Fangxiang, alternately protrudes in the table side or the inboard of fin 12 adjacent 2 bent sheet 15 (see figure 2)s of an otch 13 formation.
The fin peripheral part that otch 13 is cut apart bends, and the bent sheet 15 of triangle is outstanding to the fin peripheral part from the surface of fin 12.The stereogram of the kink that this fin peripheral part is bent into as shown in figure 13.
This situation also with the 1st embodiment similarly because the effect of bent sheet 15, the pipe outflow between the fin that separates in finned tube before passes back into the downstream side of finned tube 10 always, forms the basin, back hardly.Therefore, with similarly aforementioned, the flow velocity of finned tube downstream side increases, and the outer heet transfer rate of local pipe rises, and the outer heet transfer rate of the average tube of whole finned tube improves greatly.
In addition, in the above-described embodiments, be bent sheet 15 to be set, but also can be as illustrated in fig. 14 at the fin full periphery, bent sheet 15 is provided with that the position is specific to produce the position of separating in the pipe outflow.
Figure 15 a and Figure 15 b are the sectional drawing and the side views of expression the present invention the 4th embodiment finned tube 10.Omit 15 lateral bucklings of bent sheet of triangle towards fin 12.The stereogram of this kink is identical with Figure 13.
This situation also with the 1st embodiment similarly because the effect of bent sheet 15, the pipe outflow between the fin that separates in finned tube before passes back into the downstream side of finned tube 10 always, forms the basin, back hardly.Therefore, with similarly aforementioned, the flow velocity of finned tube downstream side increases, and the outer heet transfer rate of local pipe rises, and the outer heet transfer rate of the average tube of whole finned tube improves greatly.
In addition, in the above-described embodiments, be bent sheet 15 to be set, but also can be as illustrated in fig. 16 at the fin full periphery, bent sheet 15 is provided with that the position is specific to produce the position of separating in the pipe outflow.
Figure 17 a and Figure 17 b are the sectional drawing and the side views of expression the 6th embodiment finned tube 10, and the bent sheet shape among this embodiment is different with previous embodiment.The axle center that the end positions of the folding line of bent sheet 18 is located at finned tube 10 shown in Figure 180 is on the concentric circles R at center.
Figure 18 is the figure that represents the kink of above-mentioned bent sheet 18 in detail.At the peripheral part of fin 12, cut several otch 13 to the axle center of finned tube 10 from this fin peripheral part.1 a on otch 13 and adjacent cut 13 ' on the line of 1 a ', form folding line 17, some a is on the concentric circles at center with the axle center that some a ' is positioned at finned tube 10.By above-mentioned otch 13,13 ', the summary square part that constitutes of folding line 17 and fin periphery is as bent sheet 18, bend along the face ground of folding line 17 perpendicular to fin 12.
In this case, 18 lateral bucklings of above-mentioned bent sheet towards fin 12.For adjacent bent sheet 18 is not overlapped each other, the fin peripheral part by otch 13 is cut apart in the bending of the Zhou Fangxiang compartment of terrain of fin 12, like this, makes adjacent fin peripheral part become discontinuous bending state.The stereogram of this kink as shown in figure 19.
Therefore, this situation also with the 1st embodiment similarly because the effect of bent sheet 18, the pipe outflow passes back into the downstream side of finned tube always, forms the basin, back hardly, can improve the outer heet transfer rate of average tube.
In addition, using that the outer flow velocity scope of pipe is constant, under the situation that the formation state in the separation point position of extratubal fluid and basin, back is constant, also can 18 of bent sheet be arranged on the pipe outflow produce the ad-hoc location of separation as illustrated in fig. 20.
Figure 21 a, Figure 21 b are the sectional drawing and the side views of expression the 7th embodiment finned tube 10, and the bent sheet shape among this embodiment is different with previous embodiment.Slightly tetragonal bent sheet 16 is darted at the fin peripheral part bendingly.Figure 22 is the detailed figure of the kink of the above-mentioned bent sheet 16 of expression, at the peripheral part of fin 12, cuts several otch 13 from the axle center of the outer Zhou Dynasty of the finned tube 10 of fin.
1 a on the above-mentioned otch 13 and the line of 1 c on the adjacent cut 13 form folding line 17.Above-mentioned some a is not on the concentric circles at center in the axle center with finned tube 10 with some c.The summary quadrangle part that is made of otch 13, adjacent cut 13, folding line 17 and fin periphery as bent sheet 16, is vertically bent approximately along the face of folding line 17 with respect to fin 12.
16 side bendings of above-mentioned bent sheet towards fin 12.The stereogram of the kink of the bent sheet 16 of Xing Chenging as shown in figure 23 like this.
At this moment, as shown in figure 22, because some a, c on the otch are not on the concentric circles R at center in the axle center with finned tube 10, so, do not resemble as shown in Figure 24, adjacent bent sheet overlaps each other and blocks fin surface stream, the outflow of obstruction pipe towards the fin surface inflow, has the effect same with the 1st embodiment.
Therefore, this situation also with the 1st embodiment similarly because the effect of bent sheet 16, the pipe outflow between the fin that separates in finned tube before passes back into the downstream side of finned tube 10 always, forms the basin, back hardly.Therefore, with similarly aforementioned, the flow velocity of finned tube downstream side increases, and the outer heet transfer rate of local pipe rises, and the outer heet transfer rate of the average tube of whole finned tube improves greatly.
In addition, use that the outer flow velocity scope of pipe is constant, under the situation that the formation state in the separation point position of extratubal fluid and basin, back is constant, as shown in figure 25, also can be bent sheet 16 the specific position that produces separation in the pipe outflow, position is set.
Figure 26 a, Figure 26 b and Figure 27 represent the 8th embodiment, in alternately bending in the opposite direction of fin Zhou Fangxiang, make it alternately protrude in the table side or the dorsal part of fin 12 bent sheet 16.Other structure and Figure 21 a, Figure 21 b, the 7th embodiment shown in Figure 22 are identical.
Therefore, this situation also with the 7th embodiment similarly because the effect of bent sheet 16, the pipe outflow between the fin that separates in finned tube before passes back into the downstream side of finned tube 10 always, forms the basin, back hardly.Therefore, with similarly aforementioned, the flow velocity of finned tube downstream side increases, and the outer heet transfer rate of local pipe rises, and the outer heet transfer rate of the average tube of whole finned tube improves greatly.
In addition, as shown in figure 28, also can produce the position of separating to specific outflow the in position that be provided with of bent sheet 16 at pipe.
Figure 29 a, Figure 29 b and Figure 30 represent the 9th embodiment, among this embodiment, in alternately bending in the opposite direction of the Zhou Fangxiang of fin 12, make it alternately protrude in the table side or the dorsal part of fin 12 bent sheet 18.Other structure and Figure 17 a, Figure 17 b, the 6th embodiment shown in Figure 180 are identical.
Therefore, this situation also with the 6th embodiment similarly because the effect of bent sheet 16, the pipe outflow between the fin that separates in finned tube before passes back into the downstream side of finned tube 10 always, forms the basin, back hardly.Therefore, with similarly aforementioned, the flow velocity of finned tube downstream side increases, and the outer heet transfer rate of local pipe rises, and the outer heet transfer rate of the average tube of whole finned tube improves greatly.
In addition, at this moment as shown in figure 31, the position that is provided with of bent sheet 18 also can the specific position that produces separation in the pipe outflow.
More than among the 1st to the 9th embodiment, incision length all is identical with kink height, but incision length and kink height can be according to the decisions such as extratubal fluid kind, temperature, pressure, flow velocity, fin clearance distance, required heat exchange amount and allowable pressure loss of heat exchanger.
For example shown in figure 32, in the 5th embodiment shown in Figure 15 a and Figure 15 b, reach maximum in order to make the incision length and the kink height that produce the separation point position, in the fin periphery kink height of kink 15 is changed, like this, also can obtain the effect same with previous embodiment.
In addition, represented fin among above-mentioned each figure is the spirality fin that fin is wound on pipe place week, even but ring fin also can obtain same effect.→
Claims (20)
1. heat exchanger, have the finned tube that constitutes by the fin of managing and be installed in this pipe periphery, the axis of this finned tube intersects with the flow direction of extratubal fluid, it is characterized in that, the fin of above-mentioned finned tube has the some bent sheet that are formed on its peripheral part, the fin peripheral part that these bent sheet are, will be cut apart by some otch of managing side the outer Zhou Dynasty of fin, along the folding line that a bit extends from otch, towards with the direction bending of the surperficial approximate vertical of fin and form.
2. heat exchanger as claimed in claim 1 is characterized in that, above-mentioned folding line be on the otch a bit with the fin periphery on any line.
3. heat exchanger as claimed in claim 1 is characterized in that, above-mentioned folding line be on the otch a bit with adjacent cut on any line.
4. heat exchanger as claimed in claim 3 is characterized in that, on the above-mentioned otch a bit with adjacent cut on be not on the concentric circles at center with the tubular axis heart.
5. heat exchanger as claimed in claim 3 is characterized in that, on the above-mentioned otch a bit with adjacent cut on be on the concentric circles at center with the tubular axis heart a bit.
6. heat exchanger as claimed in claim 1 is characterized in that, each bent sheet is that the fin peripheral part of being cut apart by otch is formed towards same direction bending.
7. heat exchanger as claimed in claim 1 is characterized in that, each bent sheet is that the Zhou Fangxiang of the fin peripheral part of being cut apart by otch at fin alternately formed towards the different directions bending.
8. heat exchanger as claimed in claim 2 is characterized in that, each bent sheet is that the Zhou Fangxiang of the fin peripheral part of being cut apart by otch at fin alternately formed towards the bending of contrary direction.
9. heat exchanger as claimed in claim 3 is characterized in that, each bent sheet is that the Zhou Fangxiang of the fin peripheral part of being cut apart by otch at fin alternately formed towards the bending of contrary direction.
10. heat exchanger as claimed in claim 5 is characterized in that, each bent sheet is that the Zhou Fangxiang of the fin peripheral part of being cut apart by otch at fin alternately formed towards the bending of contrary direction.
11. heat exchanger as claimed in claim 1 is characterized in that, each bent sheet is that the fin peripheral part of being cut apart by otch is formed in the bending in the Zhou Fangxiang interval of fin.
12. heat exchanger as claimed in claim 2 is characterized in that, each bent sheet is that the fin peripheral part of being cut apart by otch is formed in the bending in the Zhou Fangxiang interval of fin.
13. heat exchanger as claimed in claim 3 is characterized in that, each bent sheet is that the fin peripheral part of being cut apart by otch is formed in the bending in the Zhou Fangxiang interval of fin.
14. heat exchanger as claimed in claim 5 is characterized in that, each bent sheet is that the fin peripheral part of being cut apart by otch is formed in the same direction and in the bending in the Zhou Fangxiang interval of fin.
15. heat exchanger as claimed in claim 1 is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
16. heat exchanger as claimed in claim 2 is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
17. heat exchanger as claimed in claim 3 is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
18. heat exchanger as claimed in claim 6 is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
19. heat exchanger as claimed in claim 7 is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.
20. heat exchanger as claimed in claim 11 is characterized in that, each bent sheet only is formed on the specific part of the fin periphery corresponding with the downstream side of managing outflow.→
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9007378A JPH10206059A (en) | 1997-01-20 | 1997-01-20 | Heat exchanger |
| JP007378/1997 | 1997-01-20 | ||
| JP007378/97 | 1997-01-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1188890A CN1188890A (en) | 1998-07-29 |
| CN1135358C true CN1135358C (en) | 2004-01-21 |
Family
ID=11664298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB981001335A Expired - Fee Related CN1135358C (en) | 1997-01-20 | 1998-01-14 | Heat exchanger |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0854344B1 (en) |
| JP (1) | JPH10206059A (en) |
| KR (1) | KR100283314B1 (en) |
| CN (1) | CN1135358C (en) |
| AT (1) | ATE245793T1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5461756B2 (en) * | 2006-04-25 | 2014-04-02 | 住友精密工業株式会社 | Evaporator |
| US20100282456A1 (en) * | 2009-05-06 | 2010-11-11 | General Electric Company | Finned tube heat exchanger |
| KR101114468B1 (en) * | 2009-07-08 | 2012-02-24 | 군산대학교 산학협력단 | Fin tube heat exchanger |
| EP2784426A1 (en) | 2013-03-27 | 2014-10-01 | GEA Batignolles Technologies Thermiques | Tube heat exchanger with optimized thermo-hydraulic characteristics |
| US10436524B2 (en) | 2014-07-03 | 2019-10-08 | King Mongkut's University Of Technology Thonburi | Mixed louver spiral fin |
| WO2018044319A1 (en) | 2016-09-02 | 2018-03-08 | General Electric Company | Finned tube heat exchanger with enhanced serrated fins and method of assembling same |
| CN107192294B (en) * | 2017-07-05 | 2022-12-06 | 江苏萃隆精密铜管股份有限公司 | High-fin heat exchange tube |
| CN107401861A (en) * | 2017-08-17 | 2017-11-28 | 河南科隆集团有限公司 | A kind of evaporator fin and its manufacture method |
| US11499747B2 (en) * | 2019-10-04 | 2022-11-15 | Rheem Manufacturing Company | Heat exchanger tubes and tube assembly configurations |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB340765A (en) * | 1929-12-20 | 1931-01-08 | Heenan & Froude Ltd | Improvements in heat exchanging apparatus |
| BE561143A (en) * | 1956-09-28 | |||
| US2896426A (en) * | 1957-03-01 | 1959-07-28 | Carrier Corp | Heat exchange construction |
| US3362058A (en) * | 1965-01-05 | 1968-01-09 | Americna Machine & Foundry Com | Welding metal fins in place |
| FR1604823A (en) * | 1967-12-01 | 1972-04-17 | ||
| GB1207718A (en) * | 1968-06-12 | 1970-10-07 | Howell & Company Ltd | Finned tubing |
| US4227572A (en) * | 1978-03-27 | 1980-10-14 | Seton-Scherr, Inc. | Finned tubing |
| JPS56165897A (en) * | 1980-05-22 | 1981-12-19 | Mitsubishi Heavy Ind Ltd | Finned tube |
| JPS5866794A (en) * | 1981-10-16 | 1983-04-21 | Yamaguchi Kikai Kenkyusho:Kk | Finned pipe for heat exchanger |
| JPS5986896A (en) * | 1982-11-09 | 1984-05-19 | Seiichi Konaka | Heat exchanger of finned tube type with small finlet |
| US4787442A (en) * | 1987-12-04 | 1988-11-29 | Carrier Corporation | Delta wing and ramp wing enhanced plate fin |
| US5240070A (en) * | 1992-08-10 | 1993-08-31 | Fintube Limited Partnership | Enhanced serrated fin for finned tube |
-
1997
- 1997-01-20 JP JP9007378A patent/JPH10206059A/en active Pending
-
1998
- 1998-01-14 CN CNB981001335A patent/CN1135358C/en not_active Expired - Fee Related
- 1998-01-19 KR KR1019980001417A patent/KR100283314B1/en not_active IP Right Cessation
- 1998-01-20 EP EP98100889A patent/EP0854344B1/en not_active Expired - Lifetime
- 1998-01-20 AT AT98100889T patent/ATE245793T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0854344A2 (en) | 1998-07-22 |
| ATE245793T1 (en) | 2003-08-15 |
| EP0854344B1 (en) | 2003-07-23 |
| EP0854344A3 (en) | 2000-01-26 |
| CN1188890A (en) | 1998-07-29 |
| KR19980070602A (en) | 1998-10-26 |
| JPH10206059A (en) | 1998-08-07 |
| KR100283314B1 (en) | 2001-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040121 Termination date: 20100222 |