CN105571209B - A kind of heat exchanger of intercommunicating pore area change - Google Patents
A kind of heat exchanger of intercommunicating pore area change Download PDFInfo
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- CN105571209B CN105571209B CN201511008864.9A CN201511008864A CN105571209B CN 105571209 B CN105571209 B CN 105571209B CN 201511008864 A CN201511008864 A CN 201511008864A CN 105571209 B CN105571209 B CN 105571209B
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- tube
- heat exchanger
- intercommunicating pore
- flat
- area
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
-
- 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
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a kind of heat exchanger, described heat exchanger includes two headers and is arranged on the heat exchanger tube between two headers；Described heat exchanger tube is flat heat exchange tube, described fin is arranged in flat tube, described fin includes sloping portion, fluid passage is spaced apart the multiple passage aisles of formation by described sloping portion, intercommunicating pore is arranged on sloping portion, the area of the intercommunicating pore in different flat heat exchange tube is different, and more remote with the distance apart from inlet tube, the area of the intercommunicating pore in described flat tube is bigger.The present invention passes through setting connection hole area with the change apart from inlet tube so that fluid, to the little heat exchange Bottomhole pressure remote apart from inlet tube of flow resistance, so that fluid is evenly distributed in heat exchanger tube, improves heat exchange efficiency, improves service life.
Description
Technical field
The present invention relates to heat exchanger, especially relate to a kind of shell-and-tube heat exchanger.
Background technology
Flat tube was widely used in automotive air conditioning units and house or commercial air-conditioner heat exchanger in recent years.This kind of flat
Multiple little passages are set inside pipe, and when using, heat exchanging fluid flows through the multiple passages in flat tube.Because flat tube heat exchange
Area is big, therefore, it is possible to greatly improve heat transfer effect.
In prior art, assignment of traffic is uneven to ask because leading to apart from inlet tube near-far problem to there is heat exchanger tube
Topic, for example, nearer apart from inlet tube, in heat exchanger tube, fluid flow is more, and more remote apart from inlet tube, and heat exchanger tube fluid flow is just
Fewer.Prior art is all utilized in header being provided with assignment of traffic and loses or pressure distribution member, by flow or
The mode of pressure distribution is making in heat exchanger tube assignment of traffic uniformly, but causes part to increase, and manufactures difficult, cost increases.
The invention provides a kind of new assignment of traffic measure so that in whole Tube Sheet of Heat Exchanger assignment of traffic uniform.
For the problems referred to above, the invention provides a kind of new shell-and-tube heat exchanger, thus solving the feelings of heat exchanger tube heat exchange
The uneven problem of internal pressure under condition.
Content of the invention
The invention provides a kind of new flat tube heat exchanger, thus solve the technical problem above occurring.
To achieve these goals, technical scheme is as follows：
A kind of heat exchanger, described heat exchanger includes lower header and is arranged on the heat exchanger tube between lower header；Described
Heat exchanger tube is flat heat exchange tube, and including flat tube and fin, described flat tube includes side wall and tube wall parallel to each other, described side
Wall connects the end of parallel tube wall, forms fluid passage, described fin setting between described side wall and described parallel tube wall
Between tube wall, described fin includes the sloping portion favouring tube wall, and described sloping portion is connected with tube wall, described inclination
Fluid passage is spaced apart the multiple passage aisles of formation by part；Intercommunicating pore is arranged on sloping portion, so that adjacent is little logical
Road communicates with each other；Described heat exchanger includes inlet tube, and described inlet tube is arranged on upper header, in different flat heat exchange tube
The area of intercommunicating pore is different, and more remote with the distance apart from inlet tube, the area of the intercommunicating pore in described flat tube is bigger.
Preferably, more remote with the distance apart from inlet tube, the area of the intercommunicating pore in described flat heat exchange tube becomes
Big amplitude more and more higher.
Preferably, the area of the intercommunicating pore in the flat heat exchange tube of inlet tube farthest is nearest apart from inlet tube
1.4-1.6 times of the area of intercommunicating pore in the flat heat exchange tube at place.
Preferably, the area of the intercommunicating pore in the flat heat exchange tube of inlet tube farthest is nearest apart from inlet tube
1.5 times of the area of intercommunicating pore in the flat heat exchange tube at place.
Preferably, the quantity of intercommunicating pore in every flat heat exchange tube is identical.
Preferably, described intercommunicating pore be shaped as the first isosceles triangle；Adjacent sloping portion connects on tube wall,
Triangle between adjacent sloping portion and tube wall, triangle between adjacent sloping portion and tube wall is
Two isosceles triangles, adjacent sloping portion is the waist of the second isosceles triangle；The drift angle of the first isosceles triangle is B, second
The drift angle of isosceles triangle is A, then meet equation below：
Sin(B)=a+b*sin(A/2) -c* sin(A/2)2；
Wherein a, b, c are parameters, wherein 0.58<a<0.59,1.65<b<1.75,1.78<c<1.85;
50°<A<150°；30°<B<80°.
Preferably, a=0.5849, b=1.6953, c=1.8244;
80°<A<120°；50°<B<60°.
Preferably, the length on the first isosceles triangle base is h, meet equation below：
0.25<d*（h/H）<0.38；Wherein d is parameter, 0.5<d<1.8；
H is with the distance between relative face of adjacent tube wall.
H is with the distance between relative face of adjacent tube wall.
Preferably, 0.8<d<1.2.
Preferably, the increase for A with drift angle, described d diminishes.
Preferably, with the increase of H, described d diminishes.
Compared with prior art, the flat heat exchange tube of the present invention has such advantages as：
1）The present invention passes through setting connection hole area with the change apart from inlet tube so that fluid is little to flow resistance
Apart from the remote heat exchange Bottomhole pressure of inlet tube, so that fluid is evenly distributed in heat exchanger tube.
2）The present invention passes through setting intercommunicating pore on the fin of flat tube it is ensured that connection between adjacent passage aisle, solution
Certainly the uneven problem of the internal pressure in the case of flat tube heat exchange, improves heat exchange efficiency, improves service life.
3）The present invention passes through the rational change determining the size of intercommunicating pore along flowing, that is, ensure rational in heat exchanger tube
Pressure, ensures to reach abundant heat exchange again.
4）The present invention by substantial amounts of experiment it is determined that the physical dimension of optimal flat heat exchange tube so that ensureing
So that heat transfer effect reaches most preferably in the case of heat exchange resistance.
Brief description
Fig. 1 is the structural representation of present invention heat exchanger；
Fig. 2 is flat tube cross-sectional structure schematic diagram of the present invention；
Fig. 3 is the structural representation of the flat tube cross section of setting fin outside the present invention；
Fig. 4 is the cross section structural representation of one flat tube inner fin setting connection hole location of the present invention；
Fig. 5 is the improved structure schematic diagram arranging outer fin flat tube cross section outside the present invention；
Fig. 6 is the schematic diagram that the present invention arranges intercommunicating pore structure sloping portion plane；
Fig. 7 is another schematic diagram that the present invention arranges intercommunicating pore structure sloping portion plane；
Fig. 8 is the triangle intercommunicating pore structure schematic diagram of the present invention.
Reference is as follows：
1 flat tube, 2 fluid passages, 3 tube walls, 4 sloping portions, 5 summits, 6 intercommunicating pores, 7 fins, 8 upper collecting chambers, 9 next parts
Case, 10 passage aisles, 11 outside fin, 12 side walls, 13 inlet tubes, 14 outlets.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in detail.
Herein, without specified otherwise, it is related to formula, "/" represents division, "×", " * " represent multiplication.
A kind of heat exchanger, as shown in figure 1, described heat exchanger includes upper collecting chamber 8 and lower header 9 and is arranged on lower header
Heat exchanger tube between 8,9.Fin 11 is set between described heat exchanger tube.Described heat exchanger can be to widely use such as automobile heat exchange
Device, air-conditioning heat exchanger etc..
As shown in Fig. 2 described heat exchanger tube is flat heat exchange tube, including flat tube 1 and fin 7, described flat tube 1 includes mutually
Parallel tube wall 3 and side wall 12, described side wall 12 connects the end of parallel tube wall 2, and described side wall 12 is parallel with described
Form fluid passage 2, described fin 7 is arranged between tube wall 3, and described fin 7 includes the inclination favouring tube wall between tube wall 3
Part 4, described sloping portion 4 is connected with parallel tube wall 3, and it is many that fluid passage 2 is spaced apart formation by described sloping portion 4
Individual passage aisle 10, adjacent sloping portion 4 connects on tube wall, constitutes three between described adjacent sloping portion 4 and tube wall 3
Angular；Sloping portion 4 arranges intercommunicating pore 6, so that adjacent passage aisle 10 communicates with each other.
Preferably, described side wall 2 is arc-shaped.
By arranging intercommunicating pore 6 it is ensured that connection between adjacent passage aisle 10, so that in the big passage aisle of pressure
Fluid can flow into the little passage aisle of neighbouring pressure, solve flat tube heat exchange in the case of internal pressure uneven
And the problem that local pressure is excessive, thus promoting abundant flowing in heat exchanger channels for the fluid, improve heat exchange efficiency, with
When also improve the service life of heat exchanger tube.
Preferably, same sloping portion 4 arranges multiple intercommunicating pores 6, along the flow direction of fluid, described connection
The area in hole 6 is increasing.
Be found through experiments, becoming larger by area, identical with area compared with, flowing can be reduced further
Resistance, can reduce about 10% about flow resistance, but heat exchange efficiency does not substantially reduce.
Preferably, along the flow direction of fluid, the amplitude that the area change of intercommunicating pore 6 is big is increasing.By experiment
Find, the big amplitude of change of the area of intercommunicating pore 6 increasing it is ensured that in the case of heat exchange efficiency, reducing stream further
Dynamic resistance, can about reduce by 5% about flow resistance.
Preferably, the centre of the tube wall 3 along flat tube cross section（I.e. in Fig. 2 cross-sectional view tube wall 3 centre
Position）To both sides Ce Bi12 direction, described intercommunicating pore 6 area on different sloping portions 4 constantly diminishes.Wherein, it is located at
The centre position of flat tube 1, that is, in Fig. 2 cross-sectional view tube wall 3 centre position, the area of intercommunicating pore 6 is maximum.Mainly former
Because being to be found through experiments, because fluid distribution is uneven, intermediate pressure is maximum, is gradually reduced to pressure at both sides from centre.Cause
This connection hole area distribution so that middle part fluid as far as possible to both sides flow, reduce middle part flow resistance, simultaneously in order to
Avoid the excessive minimizing causing heat exchange area of perforated area so that perforated area is changed according to pressure, reduce resistance
While, improve heat exchange efficiency further.
Preferably, along the centre of flat tube cross section to side wall 12 direction, the described company on different sloping portions 4
The amplitude that through hole 6 area constantly diminishes is increasing.By being arranged such, it is also the Changing Pattern meeting flowing pressure, enters
While one step reduces flow resistance, improve heat exchange efficiency.
Preferably, described intercommunicating pore 6 be shaped as isosceles triangle, the midpoint on the base of described isosceles triangle is to top
The direction at angle is identical with the flow direction of fluid.That is, the drift angle direction of isosceles triangle is fluid flow direction.Pass through
Experiment finds, drift angle direction is set to be consistent with flow direction, can improve heat exchange efficiency, reduces flowing resistance simultaneously
Power.10% about heat exchange efficiency by being arranged such, can be improved, reduce by 9% about resistance simultaneously.
Preferably, triangle between described adjacent sloping portion and tube wall is isosceles triangle, after
Referred to as second isosceles triangle.By being set to isosceles triangle it is ensured that flow of fluid uniformly, improves heat transfer effect.
Preferably, described sloping portion summit 5 is plane, the fixed point 5 of described two adjacent sloping portions 4 is connected,
Described summit 5 is connected with tube wall 3.Because setting fixed point 5 is plane, hence in so that sloping portion 4 is big with tube wall contact area, from
And tube wall is more fully preferably contacted with sloping portion.So that install being more prone to, it is to avoid slide.
Preferably, in triangle between adjacent sloping portion 4 and tube wall, the relative interior table of sloping portion 4
Face forms vertex of a triangle, and described vertex of a triangle is located on tube wall.
In Fig. 6, the flow direction of fluid is from left to right.But left and right herein is stream fluid being described along intercommunicating pore
Dynamic direction, is not offered as actual certain left and right flowing.
Preferably, the length of described isosceles triangle base midpoint to drift angle is L.
As shown in figure 9, the drift angle of described isosceles triangle is B, as shown in fig. 6, along the flow direction of fluid, same
Sloping portion 4 arranges multiple triangle intercommunicating pores 6.Preferably, along the flow direction of fluid, same sloping portion 4 sets
Put multiple intercommunicating pores 6, along the flow direction of fluid, in the case that base length keeps constant, described intercommunicating pore drift angle B
Less and less.Be found through experiments, by tapering into of intercommunicating pore drift angle B, identical with drift angle B compared with it is ensured that
In the case of heat exchange efficiency, reduce flow resistance further, can about reduce by 7% about flow resistance.
Preferably, along the flow direction of fluid, the amplitude that drift angle B diminishes is increasing.It is found through experiments, drift angle
The amplitude that B diminishes is increasing it is ensured that in the case of heat exchange efficiency, reduction flow resistance, can about reduce further
4% about flow resistance.
Preferably, along the flow direction of fluid, same sloping portion arranges multiple rows of intercommunicating pore 6, as shown in Figures 6 and 7,
Often the distance between row's intercommunicating pore is S2, and described S2 is with the base of the intercommunicating pore of adjacent row as computed range.
Preferably, as shown in fig. 7, multiple rows of intercommunicating pore 6 is shifted structure.
Find in an experiment, the area of intercommunicating pore can not be excessive, excessive if can lead to the loss of heat exchange area, reduction is changed
The thermal efficiency, too small if, cause local pressure distribution still uneven, in the same manner, the distance of adjacent tube wall 3 can not be excessive, excessive
Can lead to the reduction of heat exchange efficiency, too small flow resistance can be led to excessive.Found according to experiment, the drift angle of the first isosceles triangle
Drift angle with the second isosceles triangle is the change of certain rule, and the such as second isosceles triangle drift angle becomes big, thus leading to change
The passage aisle area of the passage of heat increases, and corresponding flow resistance diminishes, and therefore now the circulation area of the second isosceles triangle is just
Diminish, so can reduce the area of intercommunicating pore 6, in the case of ensureing flow resistance, improve heat exchange efficiency simultaneously.Therefore
There is following relation between one isosceles triangle and the second isosceles triangle drift angle：
The drift angle of the first isosceles triangle is B, and the drift angle of the second isosceles triangle is A, then meet equation below：
Sin(B)=a+b*sin(A/2) -c* sin(A/2)2；
Wherein a, b, c are parameters, wherein 0.58<a<0.59,1.65<b<1.75,1.78<c<1.85;
50°<A<150°；30°<B<80°.
Preferably, a=0.5849, b=1.6953, c=1.8244;
80°<A<120°；50°<B<60°；
By above-mentioned formula it may be determined that optimal pass between the first isosceles triangle and the second isosceles triangle drift angle
System, ensure that under here relation in the case of meeting flow resistance, reaches optimal heat exchange efficiency.
Preferably, H=7-15mm.It is further used as preferably, 9<H<12mm.
Preferably, the length on the first isosceles triangle base is h, meet equation below：
0.25<d*（h/H）<0.38；Wherein d is parameter, 0.5<d<1.8；
H is with the distance between relative face of adjacent tube wall.
Preferably, 0.8<d<1.2.
Preferably, the increase for A with drift angle, described d diminishes.
Preferably, with the increase of H, described d diminishes.
The width of tube wall is W, preferably 7.4<W/H<4.6, further preferably, 6.8<W/H<5.6.
One, by above-mentioned optimization design, can improve the heat exchange property of heat exchanger tube further, reduce flow resistance simultaneously.
The present invention is the thousands of numerical simulations and test data by multiple various sizes of heat exchanger tubes, is meeting work
In the case of industry requires pressure-bearing（Below 10MPa）, in the case of realizing maximum heat exchange amount, the optimal flat tube wall that sums up
Dimensionally-optimised relation.
For intercommunicating pore size along fluid flow direction or along the centre from heat exchanger tube cross section tube wall to side wall 2
In the case of changing, also still it is applied to above-mentioned formula, by regulation coefficient or other intercommunicating pore sizes can be selected
To meet.
Preferably, the base of the adjacent isosceles triangle intercommunicating pore of described same row is all on one wire, same
Arranging adjacent intercommunicating pore distance is S1, described 2.9 × h<S1<3.3 × h, wherein S1 are with the connection of two neighboring isosceles triangle
The distance at the midpoint on the base in hole.It is preferably 3.2 × h=S1.
Preferably, the base of the isosceles triangle of the intercommunicating pore of adjacent row is parallel to each other, the summit of isosceles triangle is arrived
The distance at base midpoint be L, adjacent row apart from S2 be 3.8*L<S2<4.8*L.It is preferably S2=4.4*L
When the base of the isosceles triangle of adjacent row is different, the weighted mean on two bases are taken to calculate.
Preferably, the angle of the isosceles triangle of same row is identical with base.I.e. shape is identical, is equal
Shape.
For formula above, for the different intercommunicating pore of front and rear row size, also still it is suitable for.
Preferably, the wall thickness of fin is 0.6-1.1mm；Preferably, 0.8-1.0mm.
For the concrete dimensional parameters do not mentioned, it is designed according to normal heat exchanger.
Preferably, as shown in Fig. 2 the outside of tube wall 3 in flat tube 1 arranges fin 11.
Preferably, described fin is straight panel shape, the bearing of trend of fin along the flow direction of fluid, that is, as Fig. 2 institute
Show, along the direction perpendicular to paper.
Preferably, along the flow direction of fluid, outside fin 11 highly constantly increases, the amplitude that height increases is got over
Come bigger.By increasing fin height, thus increasing the heat exchange area of fin.Experiment finds, by being arranged such, high with fin
Spend the identical heat exchange efficiency compared, about 5% can be improved.
Preferably, as shown in figure 5, along the centre of flat tube 1 cross section to both sides, the height of described fin 11 is continuous
Reduce.Wherein, positioned at the centre position of flat tube 1, the height highest of fin.
Because being found by experiment that, in middle part radiating at most, from middle part to both sides, radiating tapers into flat tube, therefore
By arranging the outside fin height change of flat tube so that the area of dissipation of flat tube is maximum at middle part, in both sides
Little so that middle part heat-sinking capability is maximum, so meet the heat dissipation law of flat tubular heat so that flat tube radiating is all on the whole
Even, it is to avoid flat tube local temperature is overheated, cause radiating effect excessively poor, cause the shortening of flat tube lifetime.
Preferably, described heat exchanging fluid is water.
Preferably, described heat exchanger includes inlet tube 13 and outlet 14, described inlet tube 13 is arranged on upper header 8
On, outlet 14 is arranged in lower collector pipe 9.Preferably, described inlet tube 13 and outlet 14 are arranged on the same of heat exchanger
Side, for example, is all disposed within the left of heat exchanger as shown in Figure 1.
Preferably, inlet tube 13 is arranged on the upper position of the side of upper header 8, outlet 14 is arranged on lower collector pipe 9
The lower position of side.
Preferably, the area difference of the intercommunicating pore 6 in different flat tubes, get over the distance apart from inlet tube 13
Far, the area of the intercommunicating pore 6 in described flat tube is bigger.By being arranged such so that nearer apart from inlet tube 13, then because
The area of intercommunicating pore 6 is less, then cause the resistance of flow of fluid to become big, so that fluid is into the little heat exchanger tube of flow resistance
Flowing is so that fluid gets over the heat exchange Bottomhole pressure of distant positions towards the distance apart from inlet tube 13, so that fluid distribution is equal
Even.
Preferably, more remote with the distance apart from inlet tube 13, such as pipe a in Fig. 1, b, c, d, e, f distance is entered
Mouth pipe 13 is more and more remote, and the area of the intercommunicating pore 6 in described flat tube becomes big amplitude more and more higher.It is found through experiments,
Become the increase of big amplitude by area, enable to fluid distribution more uniform.The i.e. area of pipe a intercommunicating pore 6<Pipe b connects
The area in hole 6<The area of pipe c intercommunicating pore 6<The area ... of pipe d intercommunicating pore 6, the rest may be inferred.
The area of the intercommunicating pore 6 in the heat exchanger tube of inlet tube 13 farthest is heat exchange the most nearby apart from inlet tube 13
1.4-1.6 times of the area of intercommunicating pore 6 in pipe, preferably 1.5 times.
Preferably, the quantity of intercommunicating pore 6 in every heat exchanger tube is identical.
Preferably, the quantity of intercommunicating pore 6 on each sloping portion is identical.The area of the intercommunicating pore 6 of a piece flat tube
To be calculated using changing all intercommunicating pore gross areas on flat tube.
Preferably, the distributed quantity difference of the intercommunicating pore 6 in different flat tubes, with the distance apart from inlet tube 13
More remote, the distributed quantity of the intercommunicating pore 6 in described flat tube gets more and more.By being arranged such so that apart from inlet tube 13
Nearer, then because the distributed quantity of intercommunicating pore 6 is few, the circulation area between passage aisle is less, then cause the resistance of flow of fluid
Become big, so that fluid is to the little heat exchange Bottomhole pressure of flow resistance so that fluid is got over towards the distance apart from inlet tube 13
The heat exchange Bottomhole pressure of distant positions, so that fluid distribution is uniform.
Preferably, the distributed quantity of intercommunicating pore 6 described flat tube in more remote with the distance apart from inlet tube 13
Become many amplitude more and more highers.It is found through experiments, becomes the increase of big amplitude by area, enable to fluid distribution more
Uniformly.
The area of the intercommunicating pore 6 in the heat exchanger tube of inlet tube 13 farthest is heat exchange the most nearby apart from inlet tube 13
1.4-1.6 times of the distributed quantity of intercommunicating pore 6 in pipe, preferably 1.5 times.
Preferably, the area of each intercommunicating pore 6 is identical.
Preferably, included angle A in different flat tubes is of different sizes.It is more remote with the distance apart from inlet tube 13,
The included angle A that sloping portion 4 in described flat tube is formed is increasing.By being arranged such so that getting over apart from inlet tube 13
Closely, then because diminishing of included angle A, cause the circulation area of passage aisle less, then cause the resistance of flow of fluid to become big, so that
Obtain fluid to the little heat exchange Bottomhole pressure of flow resistance so that fluid gets over the heat exchange of distant positions towards the distance apart from inlet tube 13
Bottomhole pressure, so that fluid distribution is uniform.
Preferably, folder that sloping portion 4 described flat tube in formed more remote with the distance apart from inlet tube 13
Angle A becomes big amplitude more and more higher.It is found through experiments, becomes the increase of big amplitude by A, enable to fluid distribution more
Uniformly.
Preferably, the included angle A of the intercommunicating pore 6 of same flat tube to be calculated using average angle, that is, pass through multiple angles
Weighted average is calculating.
Preferably, the included angle A of all intercommunicating pores 6 of same flat tube is equal.
Preferably, base length h of the isosceles triangle intercommunicating pore 6 of all heat exchanger tubes is equal, in different flat tubes
Drift angle B of different sizes.More remote with the distance apart from inlet tube 13, isosceles triangle intercommunicating pore in described flat tube
Drift angle B is less and less.By being arranged such so that nearer apart from inlet tube 13, then the change because of drift angle B is big, causes intercommunicating pore 6
Circulation area less, then cause the resistance of flow of fluid to become big, so that fluid flows into the little heat exchanger tube of flow resistance
Move so that fluid gets over the heat exchange Bottomhole pressure of distant positions towards the distance apart from inlet tube 13, so that fluid distribution is uniform.
Preferably, described flat tube in isosceles triangle intercommunicating pore more remote with the distance apart from inlet tube 13
The less and less amplitude more and more higher of drift angle B.It is found through experiments, the increase of the amplitude being diminished by drift angle B, enable to flow
Body distribution is more uniform.
Preferably, the drift angle B of the intercommunicating pore 6 of same flat tube to be calculated using average drift angle, that is, pass through multiple drift angles
Weighted average is calculating.
Preferably, the drift angle B of all intercommunicating pores 6 in same flat tube is equal.
Preferably, the L of the isosceles triangle intercommunicating pore 6 of all heat exchanger tubes is equal, the bottom side length in different flat tubes
Of different sizes, described flat tube in the base of isosceles triangle intercommunicating pore more remote with the distance apart from inlet tube 13 of degree h
Length h is increasing.By being arranged such so that nearer apart from inlet tube 13, then because the diminishing of base length h, the company of causing
The circulation area of through hole 6 is less, then cause the resistance of flow of fluid to become big, so that fluid is to the little heat exchanger tube of flow resistance
Interior flowing is so that fluid gets over the heat exchange Bottomhole pressure of distant positions towards the distance apart from inlet tube 13, so that fluid distribution
Uniformly.
Preferably, described flat tube in isosceles triangle intercommunicating pore more remote with the distance apart from inlet tube 13
The increasing amplitude more and more higher of base length h.It is found through experiments, become the increase of big amplitude, energy by base length h
Enough make fluid distribution more uniform.
Preferably, base length h of the intercommunicating pore 6 of same flat tube to be calculated using average drift angle, that is, pass through multiple bottoms
The weighted average of edge lengths h is calculating.
Preferably, base length h of all intercommunicating pores 6 of same flat tube is equal.
Preferably, same sloping portion arranges multiple rows of intercommunicating pore 6, as shown in Figures 3 and 4, often between row's intercommunicating pore away from
From for S2, the S2's in different flat tubes is of different sizes, and more remote with the distance apart from inlet tube 13, described S2 is increasingly
Little.By being arranged such so that nearer apart from inlet tube 13, then because S2 is bigger, cause the circulation area of intercommunicating pore 6 less,
The resistance then causing flow of fluid becomes big so that fluid to the little heat exchange Bottomhole pressure of flow resistance so that fluid towards
Distance apart from inlet tube 13 gets over the heat exchange Bottomhole pressure of distant positions, so that fluid distribution is uniform.
Preferably, S2 less and less amplitude more and more higher more remote with the distance apart from inlet tube 13.By experiment
Find, the increase of the amplitude being diminished by S2, enable to fluid distribution more uniform.
Preferably, the S2 of the intercommunicating pore 6 of same flat tube to be calculated using average drift angle, is put down by the weighting of multiple S2
All to calculate.
Preferably, the S2 of all intercommunicating pores 6 of same flat tube is equal.
Preferably, the base of the adjacent isosceles triangle intercommunicating pore of described same row is all on one wire, same
Arranging adjacent intercommunicating pore distance is S1, and the S1's in different flat tubes is of different sizes, gets over the distance apart from inlet tube 13
Far, described S1 is less and less.By being arranged such so that nearer apart from inlet tube 13, then because S1 is bigger, cause intercommunicating pore
6 circulation area is less, then cause the resistance of flow of fluid to become big, so that fluid flows into the little heat exchanger tube of flow resistance
Move so that fluid gets over the heat exchange Bottomhole pressure of distant positions towards the distance apart from inlet tube 13, so that fluid distribution is uniform.
Preferably, S1 less and less amplitude more and more higher more remote with the distance apart from inlet tube 13.By experiment
Find, the increase of the amplitude being diminished by S1, enable to fluid distribution more uniform.
Preferably, the S1 of the intercommunicating pore 6 of same flat tube to be calculated using average drift angle, is put down by the weighting of multiple S1
All to calculate.
Preferably, the S1 of all intercommunicating pores 6 of same flat tube is equal.
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should
When being defined by claim limited range.
Claims (7)
1. a kind of heat exchanger, described heat exchanger includes lower header and is arranged on the heat exchanger tube between lower header；Described change
Heat pipe is flat heat exchange tube, and including flat tube and fin, described flat tube includes side wall and tube wall parallel to each other, described side wall
Connect the end of parallel tube wall, between described side wall and described parallel tube wall, form fluid passage, described fin is arranged on
Between tube wall, described fin includes the sloping portion favouring tube wall, and described sloping portion is connected with tube wall, described rake
Divide and fluid passage is spaced apart the multiple passage aisles of formation；Sloping portion arranges intercommunicating pore, so that adjacent passage aisle
Communicate with each other；Described heat exchanger includes inlet tube, described inlet tube be arranged on upper header it is characterised in that：Different is flat
The area of the intercommunicating pore in heat exchanger tube is different, more remote with the distance apart from inlet tube, the intercommunicating pore in described flat tube
Area is bigger.
2., it is characterised in that more remote with the distance apart from inlet tube, described is flat for heat exchanger as claimed in claim 1
The area of the intercommunicating pore in heat exchanger tube becomes big amplitude more and more higher.
3. heat exchanger as claimed in claim 1 or 2 is it is characterised in that in the flat heat exchange tube of inlet tube farthest
The area of intercommunicating pore is 1.4-1.6 times of the area of the intercommunicating pore in inlet tube flat heat exchange tube the most nearby.
4. heat exchanger as claimed in claim 3 is it is characterised in that connection in the flat heat exchange tube of inlet tube farthest
The area in hole is 1.5 times of the area of the intercommunicating pore in inlet tube flat heat exchange tube the most nearby.
5. heat exchanger as claimed in claim 1 is it is characterised in that the quantity of intercommunicating pore on each sloping portion is identical.
6. heat exchanger as claimed in claim 1, described intercommunicating pore be shaped as the first isosceles triangle；Adjacent sloping portion
Tube wall connects, triangle between adjacent sloping portion and tube wall, between adjacent sloping portion and tube wall
Triangle is the second isosceles triangle, and adjacent sloping portion is the waist of the second isosceles triangle；First isosceles triangle
Drift angle be B, the drift angle of the second isosceles triangle is A, then meet equation below：
Sin(B)=a+b*sin(A/2) -c* sin(A/2)2；
Wherein a, b, c are parameters, wherein 0.58<a<0.59,1.65<b<1.75,1.78<c<1.85;
50°<A<150°；30°<B<80°.
7. heat exchanger as claimed in claim 6 is it is characterised in that a=0.5849, b=1.6953, c=1.8244;
80°<A<120°；50°<B<60°.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511008864.9A CN105571209B (en) | 2015-12-30 | 2015-12-30 | A kind of heat exchanger of intercommunicating pore area change |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511008864.9A CN105571209B (en) | 2015-12-30 | 2015-12-30 | A kind of heat exchanger of intercommunicating pore area change |
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| Publication Number | Publication Date |
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| CN105571209A CN105571209A (en) | 2016-05-11 |
| CN105571209B true CN105571209B (en) | 2017-03-08 |
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| CN201511008864.9A Expired - Fee Related CN105571209B (en) | 2015-12-30 | 2015-12-30 | A kind of heat exchanger of intercommunicating pore area change |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855451B (en) * | 2018-07-20 | 2020-10-23 | 国网山东省电力公司聊城供电公司 | Steam heat exchanger capable of uniformly distributing flow |
| CN109855452B (en) * | 2018-07-20 | 2020-03-17 | 国网山东综合能源服务有限公司 | Shell-and-tube heat exchanger containing non-condensable gas |
| CN109855450B (en) * | 2018-07-20 | 2020-08-18 | 国网山东综合能源服务有限公司 | Design method for tube spacing of non-condensable gas shell-and-tube heat exchanger |
| CN109855453B (en) * | 2018-07-20 | 2020-03-17 | 国网山东综合能源服务有限公司 | Vapor-liquid two-phase flow shell-and-tube heat exchanger |
| CN109855449B (en) * | 2018-07-20 | 2020-06-26 | 国网山东省电力公司聊城供电公司 | Shell-and-tube heat exchanger for generating steam |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201028900Y (en) * | 2007-04-24 | 2008-02-27 | 张奡 | Novel flat flowing condenser |
| CN203443450U (en) * | 2013-07-10 | 2014-02-19 | 北京凯德菲冷却器制造有限公司 | Tube bundle of flat tubes with inner fins and outer fins |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7107680B2 (en) * | 2003-06-20 | 2006-09-19 | Denso Corporation | Manufacturing method of heat exchanger and structure thereof |
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2015
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201028900Y (en) * | 2007-04-24 | 2008-02-27 | 张奡 | Novel flat flowing condenser |
| CN203443450U (en) * | 2013-07-10 | 2014-02-19 | 北京凯德菲冷却器制造有限公司 | Tube bundle of flat tubes with inner fins and outer fins |
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