CN103900401B - Finned tube heat dissipation device with density of protrusions changing - Google Patents
Finned tube heat dissipation device with density of protrusions changing Download PDFInfo
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- CN103900401B CN103900401B CN201410154672.8A CN201410154672A CN103900401B CN 103900401 B CN103900401 B CN 103900401B CN 201410154672 A CN201410154672 A CN 201410154672A CN 103900401 B CN103900401 B CN 103900401B
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- 230000017525 heat dissipation Effects 0.000 title abstract description 4
- 239000012530 fluid Substances 0.000 claims abstract description 38
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- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 22
- 238000012546 transfer Methods 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 239000011248 coating agent Substances 0.000 description 14
- 238000000576 coating method Methods 0.000 description 14
- 229910000838 Al alloy Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- 239000002562 thickening agent Substances 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
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- 238000010438 heat treatment Methods 0.000 description 4
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 3
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 3
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Abstract
The invention provides a finned tube heat dissipation device with the density of protrusions changing. The heat dissipation device comprises a finned tube. The finned tube comprises a circular base tube, a first fin, a second fin, a third fin and a fourth fin. A first connecting piece is arranged between the first fin and the second fin, and a second connecting piece is arranged between the third fin and the fourth fin. The protrusions are arranged in the base tube, and the distribution density of the protrusions increases gradually in the flowing direction of fluids. The structure of the finned tube is optimized, heat exchange in the flowing direction of the fluids is improved, the heat exchange efficiency is maximized, energy resources are saved, and the purpose of protecting the environment and saving energy is achieved.
Description
Technical field
The invention belongs to field of heat exchangers, particularly relate to a kind of heating finned tubular radiator.
Background technology
The terminal device of Home Heating, thermal source is generally city central heating, self-built boiler room, community, Domestic wall stove etc., by heat transfer, radiation, convection current heat spreader out, allows the temperature in room get a promotion.
In radiator; be suitable for finned tubular radiator widely at present; area of dissipation can be expanded by fin; strengthen heat transfer effect; but the quality of the setting of the fansink-type of finned tube and finned tube parameter all influencer's radiating effect; and at present when energy crisis; urgent need wants economize energy; meet the sustainable development of society; therefore need to develop a kind of new finned tube, need the structure of finned tube to be optimized simultaneously, make it reach maximum heat exchange efficiency; with economize energy, reach the object of environmental protection and energy saving.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of new circular arc type closed finned tube radiator.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of finned tubular radiator of enclosed construction, comprise the finned tube of upper header, lower collector pipe and connection upper header and lower collector pipe, described finned tube comprises circular base tube and the first fin, the second fin, first fin and the second fin are arranged on the outside of base tube and the extended line of the first fin and the second fin intersects at the central axis of the base tube at the place, the center of circle of base tube, and the first fin and the second fin are along the first plane specular by base tube central axis; Described finned tube comprises the 3rd fin and the 4th fin, described 3rd fin, the 4th fin along the second plane respectively with the first fin and the second fin specular, described second plane and the first plane orthogonal and the central axis through base tube; Arrange the first brace between described first fin and the second fin, arrange the second brace between described 3rd fin and the 4th fin, the first brace and the second brace are circular arc type metallic plate; 3rd fin and the 4th fin of the first fin, the second fin and adjacent fins pipe form space; The central axis at place, the center of circle of described circular arc-shaped metal plate and the central axes of base tube; Described base tube is straight tube, and the central axis of described adjacent base tube is parallel to each other; First fin of adjacent base tube is parallel to each other.
Angle between described first fin and the second fin is A, and the length of the first fin and the second fin is L, and the outer radius of base tube is R, and along base tube fin height H axially, the relation of above-mentioned four meets following formula:
Sin(A/2)=a*(L/R)
2+b*(L/R)+c
H/ (R*10)=e*Sin (A/2)
2wherein, A unit is angle to-f*Sin (A/2)+h, 60 ° of <A<110 °,
L is of a size of mm, 12mm<L<80mm,
The unit of R is mm, 10mm<R<80mm,
The unit of H is mm, 800mm<R<1200mm,
A, b, c, e, f, h are coefficient, and the scope of the scope of the scope of a to be the scope of 0.04-0.042, b be 0.266-0.28, c to be the scope of 0.36-0.37, e be 21-23, f is 44-45, h is 23-25.
The optimum of parameter is: a is 0.0412, b be 0.02715, c be 0.03628, e be 22, f be 44.37, h is 23.86.
As one preferably, the distance between adjacent base tube central axis is S=d*(L+R) * sin (A/2), wherein d is 1.1-1.2.
The optimum results of d is 1.118.
The material of described base tube and fin is aluminium alloy, and the mass percent of the component of described aluminium alloy is as follows: 3.0% Cu, 1.9% Mg, 1.6% Ag, 0.6% Mn, 0.25% Zr, 0.3% Ce, 0.23% Ti, 0.38% Si, and all the other are Al.
The pipe inside of described base tube arranges anticorrosive coat, and the outside of base tube is coated with coating rubbing-layer, and the thermal coefficient of expansion of anticorrosive coat, base tube and wearing layer increases successively.
Described radiator also comprises control system, and described control system controls according to indoor temperature the flow velocity entering water in radiator.
Described control system comprises: temperature sensor, flow controller and central controller, and flow controller controls the flow velocity entering radiator, described temperature sensor is for measuring indoor temperature, when indoor temperature reaches the first temperature, central controller controls flow controller reaches the first flow velocity, when indoor temperature reaches the second temperature higher than the first temperature, central controller controls flow controller reaches the second flow velocity lower than the first flow velocity, when indoor temperature reaches the 3rd temperature higher than the second temperature, central controller controls flow controller reaches the 3rd flow velocity lower than the second flow velocity, when indoor temperature reaches the 4th temperature higher than the 3rd temperature, central controller controls flow controller reaches the 4th flow velocity lower than the 3rd flow velocity, when indoor temperature reaches the 5th temperature higher than the 4th temperature, flow controller cuts out by central controller, stops water to enter radiator.
Described anticorrosive coat is become to be grouped into by following:
Zinc flake 8.3%, aluminium oxide is 8%, and boric acid is 7.3%, and acrylic acid is 0.7%, and wetting dispersing agent is 0.4%, and thickener is 0.15%, and defoamer is 0.23%, the water of surplus.
Described wetting dispersing agent is the SA-20 in peregal series, and hydroxyethylcellulose selected by described thickener; Tributyl phosphate selected by described defoamer.
Axially fin is not had near the part of upper header and lower collector pipe at base tube.
Base tube is greater than the length not having finless parts of close upper fin near the length of the part of fin that do not have of the part of lower collector pipe.
The circulation area of upper header inner fluid reduces gradually along fluid flow direction.
The inside of upper header arranges deflector, and the lower tilt of described deflector from the position of radiator inlet tube to upper header extends.
The top wall of the upper header lower tilt from the position of radiator inlet tube to upper header extends.
The shape of flow deflector is the shape of straight plate shape or arc.
Compared with prior art, solar water appliance of the present invention has following advantage:
1) the invention provides a kind of new finned tube, and because the extension line of fin of finned tube overlaps with the center of circle of base tube, thus make heat transfer effect reach best.
2) the present invention is by test of many times, devise different tube diameters, differing heights, angle fin test, thus obtain an optimum fin optimum results, and verified by test, thus demonstrate the accuracy of result.
3) by the reasonable distribution to the mass percent of the component of aluminium alloy, high-fire resistance and the high-termal conductivity of finned tube is improved.
4) thermal coefficient of expansion of anticorrosive coat, base tube and wearing layer increases successively, ensures that when logical hot water, the expansion rate of each layer is identical, ensures combining closely of each layer, prevents from coming off.
5) by control system, automatically control the flow velocity entering the water of radiator, maintenance room temperature reaches a stable numerical value.
6) by axially there is no fin near the part of upper header and lower collector pipe at base tube, ensure that the air of base tube bottom can carry out in the space of finned tube smoothly, the suction effect reached, also can ensure simultaneously air technique to top convection current, increase the effect of heat convection.
7) be greater than the length not having finless parts of close upper fin by base tube near the length of the part of fin that do not have of the part of lower collector pipe, can convection effects be increased.
8) reducing gradually by the circulation area of upper header inner fluid, makes fluid flow flow velocity keep maximum, augmentation of heat transfer.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of radiator of the present invention;
Fig. 2 is the cross sectional representation of finned tube;
Fig. 3 is the schematic diagram of radiator control system;
Fig. 4 is that Fig. 3 is from the schematic diagram viewed from left side;
Fig. 5 is the radiator schematic diagram with deflector;
Fig. 6 is the radiator schematic diagram that upper header sectional area shrinks gradually.
Reference numeral is as follows:
1 upper header, does not have the part of fin in 2 base tubes, 3 lower collector pipe, 4 finned tubes, 5 base tubes, 6 water first fins, 7 gaps, 8 first braces, 9 second fins, 10 the 4th fins, 11 the 3rd fins, 12 second braces, 13 central controllers, 14 flow controllers, 15 temperature sensors, 16 temperature sensors, 17 radiators, 18 inlet tubes, 19 outlets, 20 deflectors, 21 upper header upper surfaces.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Herein, if do not have specified otherwise, relate to formula, "/" represents division, "×", " * " represent multiplication.
A kind of finned tubular radiator 17 of enclosed construction, comprise upper header 1, lower collector pipe 3 and be connected the finned tube 4 of upper header 1 and lower collector pipe 3, described finned tube 4 comprises circular base tube 5 and the first fin 6, second fin 9, first fin 6 and the second fin 9 are arranged on the outside of base tube 5 and the extended line of the first fin 6 and the second fin 9 intersects at the central axis of the base tube at the place, the center of circle of base tube 5, and the first fin 6 and the second fin 9 are along the first plane B specular by base tube central axis; Described finned tube comprises the 3rd fin 11 and the 4th fin 10, described 3rd fin 11, the 4th fin 10 along the second plane C respectively with the first fin 6 and the second fin 9 specular, described second plane C is vertical with the first plane B and through the central axis of base tube 5; Between described first fin 6 and the second fin 9, first brace 8 is set, the second brace 12, first brace 8 is set between described 3rd fin 11 and the 4th fin 10 and the second brace 12 is circular arc type metallic plate; The central axis of described circular arc-shaped metal plate and the central axes of base tube 5; Described base tube is straight tube, and the central axis of described adjacent base tube is parallel to each other.
Preferably, the first fin of adjacent base tube is parallel to each other, represents that the second fin of adjacent base tube is also parallel to each other, and in like manner, the 3rd fin, the 4th fin are also parallel to each other.This feature shows that finned tube arranges according to equidirectional.
It is to be understood that as shown in Figure 2, the central axis of base tube is exactly the line that the set of centre point on the cross section of base tube 5 is formed, and the central axis of circular arc-shaped metal plate is exactly the line that the set of the centre point of circular arc-shaped metal plate on cross section is formed.The central axis of described circular arc-shaped metal plate and the central axes of base tube 5 just refer on cross section, and circular arc-shaped metal plate and base tube are concentric circles.
Preferably, the size of all finned tubes is all identical.
By above-mentioned setting, make to form a gap 7 between fin and brace, when heat convection, gap 7 just defines a kind of chimney effect, can strengthen heat exchange.
3rd fin and the 4th fin of the first fin, the second fin and adjacent fins pipe form space, and this space forms certain space, can form chimney effect, add strong convection, augmentation of heat transfer.
Angle between described first fin 6 and the second fin 9 is A, and the length of the first fin 6 and the second fin 9 is L, and the outer radius of base tube is R, and certainly, because specular, the length of the 3rd fin 11 and the 4th fin 10 is also L naturally.But find in practice, if in heat transfer process. fin angle is too small, then heat exchange can be hindered, because the words that fin angle is too small, cause the first fin, the distance of the second fin is too near, then temperature boundary layer in closed area along with the direction of base tube height starts overlap, gas temperature moves closer to heat close to tube wall temperature saturated, flow resistance increases, finally worsen heat exchange on the contrary, the advantage of outer fin plays not out, same reason, along with the constantly increase of angle, make the distance of brace distance base tube original nearer, make temperature boundary layer equally in closed area along with the direction of base tube height starting overlap, gas temperature moves closer to heat close to tube wall temperature saturated, flow resistance increases, finally worsen heat exchange on the contrary, therefore angle has an optimum value.
For finned length, if oversize, even if then because the heat of base tube cannot arrive the end of fin in time or be effective also not obvious, if too short, then expand heat exchange area too little, cannot reach a good heat transfer effect, therefore the height of fin also has an optimum value.
For the distance between two finned tubes, if first distance is too near or completely close, then the space (see Fig. 1) of the spacing of the brace of two finned tubes is too little, then air cannot enter the space formed between finned tube by the gap between fin, heat exchange now can only rely on and enter air bottom radiator, good heat convection effect cannot be reached, same reason, if the distance is too far, then the one the second the 3 4th fins of finned tube cannot form the space of effective chimney effect, thus cause heat transfer effect to be deteriorated, therefore a suitable numerical value is also needed for the distance between two finned tubes.
As shown in Figure 4, for fin along base tube 5 height H axially, also need to have a suitable numerical value, if fin height is too high, then on the top of fin, because boundary layer in closed area along with the direction of base tube height starts overlap, cause the deterioration of heat exchange, in like manner, highly too low, then heat exchange does not give full play to, thus affects heat transfer effect.
Therefore, the present invention is the size relationship of the finned tube of the radiator of the best summed up by the test data of the radiator of multiple different size.Because finned tube also has included angle A, these three variablees of finned length L, fin height H, therefore, introduce two characteristic sin (A/2), L/R, H/R, R is the radius of base tube here, from the heat dissipation capacity maximum in heat transfer effect, calculate nearly 200 kinds of forms.Described size relationship is as follows:
Angle between described first fin and the second fin is A, and the length of the first fin and the second fin is L, and the outer radius of base tube is R, and along base tube fin height H axially, the relation of above-mentioned four meets following formula:
Sin(A/2)=a×(L/R)
2+b×(L/R)+c
H/ (R × 10)=e × Sin (A/2)
2wherein, A unit is angle to-f × Sin (A/2)+h, 60 ° of <A<110 °,
L is of a size of mm, 12mm<L<80mm,
The unit of R is mm, 10mm<R<80mm,
The unit of H is mm, 800mm<R<1200mm,
A, b, c, e, f, h are coefficient, and the scope of the scope of the scope of a to be the scope of 0.04-0.042, b be 0.266-0.28, c to be the scope of 0.36-0.37, e be 21-23, f is 44-45, h is 23-25.
By testing after result of calculation, by the numerical value of computation bound and median, the result of gained matches with formula substantially, and error is substantially within 4%, and maximum relative error is no more than 6%, and mean error is 2% again.；
The optimum of coefficient optimization is: a is 0.0412, b be 0.02715, c be 0.03628, e be 22, f be 44.37, h is 23.86.
Preferably, the distance between adjacent base tube central axis is S=d × (L+R) × sin (A/2), and wherein d is 1.1-1.2.
As shown in Figure 2, the distance between adjacent base tube central axis is exactly the distance on cross section between two base tube centers of circle.
The optimum results of d is 1.118.
The material of base tube and fin is aluminium alloy, and the mass percent of the component of described aluminium alloy is as follows: 3.0% Cu, 1.9% Mg, 1.6% Ag, 0.6% Mn, 0.25% Zr, 0.3% Ce, 0.23% Ti, 0.38% Si, and all the other are Al.
The manufacture method of aluminium alloy is: adopt vacuum metallurgy melting, and argon for protecting pouring becomes circle base, through 600 DEG C of Homogenization Treatments, at 400 DEG C, adopts and is hot extruded into bar, and then after 580 DEG C of solution hardening, carry out artificial aging process at 200 DEG C.Thermal conductivity factor is for being greater than 250W/ (m*k).
Base tube and fin can be integrally manufactured, also can split manufacture, and base tube and fin also can be different materials, and such as base tube is above-mentioned aluminium alloy, and fin then can adopt other alloys, and wherein other alloys are composed as follows:
The following Ni 30% of mass percent; Cr 20%; Al 6%; C 0.03%; B 0.016%; Co 2%; Ti 3%; Nb 0.1%; La 0.2%; Ce0.2%; Fe surplus.
The manufacture method of alloy is: become ingot by the composition smelting and pouring according to electrothermal alloy in vaccum sensitive stove, then at 1200 DEG C-900 DEG C, alloy pig forge hot is become bar, be rolled into dish material at 1200 DEG C-900 DEG C, then becomes the silk material of different size in room temperature cold-drawn.
After tested, above-mentioned alloy has very high thermal conductivity factor.
The pipe inside of described base tube 5 arranges anticorrosive coat, and the outside of base tube is coated with coating rubbing-layer, and the thermal coefficient of expansion of anticorrosive coat, base tube and wearing layer increases successively.Why so arranging is because in the process of heat supply, the anticorrosive coat of the inside of finned tube is first heated, first expand, then be outwards the second layer, third layer expanded by heating successively, therefore from inside to outside three layers of expansion number of times increase successively and can ensure that expansion rate is consistent substantially, ensure the compactness that each layer connects and stability.
As shown in Figure 3, described radiator also comprises control system, and described control system controls according to indoor temperature the flow velocity entering water in radiator.
Described control system comprises: temperature sensor (not illustrating in Fig. 3), flow controller 14 and central controller 13, and flow controller 14 controls the flow velocity entering the water of radiator, described temperature sensor is for measuring indoor temperature, when indoor temperature is lower than the first temperature, flow controller is all opened, when indoor temperature reaches the first temperature, central controller controls flow controller reaches the first flow velocity, first flow velocity will lower than the flow velocity all opened, when indoor temperature reaches the second temperature higher than the first temperature, central controller controls flow velocity reaches the second flow velocity lower than the first flow speed controller, when indoor temperature reaches the 3rd temperature higher than the second temperature, central controller controls flow controller reaches the 3rd flow velocity lower than the second flow velocity, when indoor temperature reaches the 4th temperature higher than the 3rd temperature, central controller controls flow controller reaches the 4th flow velocity lower than the 3rd flow velocity, when indoor temperature reaches the 5th temperature higher than the 4th temperature, flow controller cuts out by central controller, stops water to enter radiator.
5th temperature is exactly for very high temperature, and such as more than 25 degree, the first temperature is exactly lower temperature, such as less than 15 degree.By above-mentioned setting, can control the more heat of radiator according to temperature, reach the effect of economize energy, especially next step will develop according to heat charging, therefore will inevitably receive an acclaim.
In addition, can be used for measuring and enter and go out the temperature of water of radiator by set temperature sensor 15,16.
Described control system can be a single-chip microcomputer, can arrange control panel, and control panel is arranged on top or the bottom of radiator, also can be arranged on and enter on the pipeline of radiator.
Described anticorrosive coat is generated by coating anticorrosive paint, and anticorrosive paint is become to be grouped into by following: zinc flake 8.3%, and aluminium oxide is 8%, boric acid is 7.3%, and acrylic acid is 0.7%, and wetting dispersing agent is 0.4%, thickener is 0.15%, and defoamer is 0.23%, the water of surplus.
Prepare a method for above-mentioned water-based anticorrosive paint, the method is implemented according to following steps,
A, by coating gross mass percentage, take a certain amount of water, the wetting dispersing agent of 0.4% and the defoamer of 0.23% respectively, then admixed together, abundant stirring makes it dissolving and makes coating mixed liquor A 1, add in mixed liquor A 1 again account for coating gross mass 8.3% flake metal powder, stir and make coating mixed liquor A 2;
B, by coating gross mass percentage, take 7.3% boric acid, composition mixed liquor, join in the water of 20% ~ 40% fully to dissolve and make inorganic acid mixed liquid B 1, then to
Add the oxidate powder of 8% in mixed liquid B 1, be stirred to and make inorganic acid mixed liquid B 2 without precipitation;
C, by coating gross mass percentage, take the acrylic acid of 0.7%, join in the water of 5% ~ 15%, stir and make reducing agent mixed liquor C;
D, by coating gross mass percentage, take the thickener hydroxyethylcellulose of 0.15%, join in the water of 2.5% ~ 15%, be stirred to be translucent shape and gel-free of dissolving and occur namely stopping stirring making thickener mixed liquor D;
E, the inorganic acid mixed liquid B 2 of preparation is joined in coating mixed liquor A 2, then 1/5 ~ 1/2 of reducing agent mixed liquor C amount of preparation is added, add thickener mixed liquor D while stirring, add the water of surplus again, continue stirring 30 ~ 90 minutes, until coating mixed liquor uniformity soilless sticking particle, finally add remaining reducing agent mixed liquor C again, stir 10 ~ 40 minutes again, to obtain final product.
This kind of coating is applied over finned tube surface by spraying, brushing, dip-coating, dries 10 ~ 60 minutes for 80 ± 10 DEG C, and 280 ± 40 DEG C solidify sintering 30 ~ 60 minutes, form good anti-corrosion coating.
Described wetting dispersing agent is the SA-20 in peregal series, and hydroxyethylcellulose selected by described thickener; Tributyl phosphate selected by described defoamer.
As shown in Figure 1, axially fin is not had near the part of upper header and lower collector pipe at base tube 5.Can ensure that the air of bottom can enter in the space formed between fin like this, out from air top, strengthen convection effects simultaneously.
As shown in Figure 4, base tube 5 is greater than the length not having finless parts of close upper fin near the length of the part of fin that do not have of the part of lower collector pipe.Main because be that lower air surface density is large, can ensure entering of more air, upper air density is little, and air more easily rises, and air therefore can be kept to enter and go out finned tube amount and be substantially consistent.
Preferably, bottom does not have the length of the part of fin to account for 5% of the length of base tube 5, and top does not have the length of the part of fin to account for 3% of the length of base tube 5.
The inwall of base tube 5 can arrange fin, such as, can arrange straight fins or helical fin, and the height of described fin can increase gradually along with on the direction of fluid flowing, and the highest fin height is minimum 1.05-1.1 times.Main cause is the direction along with fluid flowing, the temperature of fluid declines gradually, and its heat transfer effect is reduced gradually, arranges difference by the height increasing inner fins, can heat exchange on enhance fluid flow direction, thus heat transfer effect is consistent on the whole along fluid flow direction.
The inwall of base tube 5 is provided with projection, and for augmentation of heat transfer, the distribution of described projection is according to certain rule.Preferably, along the flow direction of fluid, protruding distribution is more and more closeer, like this, be the direction along with fluid flowing, the temperature of fluid declines gradually, its heat transfer effect is reduced gradually, by increasing the density of projection of inner fins, can heat exchange on enhance fluid flow direction, thus heat transfer effect is consistent on the whole along fluid flow direction.The direction that to be protruding height flow along with fluid increases another mode preferred gradually, and wherein the highest is minimum 1.06-1.18 times.Identical with heat exchange principle above, main cause is the direction along with fluid flowing, the temperature of fluid declines gradually, its heat transfer effect is reduced gradually, by the height increasing internal protrusion, difference is set, can heat exchange on enhance fluid flow direction, thus heat transfer effect is consistent on the whole along fluid flow direction.
Because along on the flow direction of fluid in upper header, the flowing pressure of fluid is more and more less, thus the maldistribution of fluid in the finned tube made, rate of flow of fluid in the finned tube of rear portion is declined, therefore in order to ensure that the pressure of the fluid in upper header remains unchanged, the present invention devises and the circulation area of upper header 1 inner fluid is reduced gradually along fluid flow direction, what the flow velocity of the fluid entered in finned tube can be made like this to keep is large as far as possible, especially the finned tube of fluid flow downstream is positioned at, thus augmentation of heat transfer.
As a preferred embodiment, as shown in Figure 5, the inside of upper header 1 arranges deflector 20, described deflector 20 is inclined, extend to the bottom of upper header 1 from the top of upper header 1, the fluid flow area of upper header is reduced gradually from radiator inlet tube 18, can ensure that upper collecting chamber keeps consistency along the pressure on fluid flow direction like this, thus the flow velocity of the fluid entered in finned tube is kept as far as possible large, thus augmentation of heat transfer.
Flow deflector 20 is connected with two, the left and right wall of upper header, and wherein at right wall, the position that radiator inlet tube 18 is connected with upper header 1, deflector 20 is positioned at the top of inlet tube and heat collector junction.
The angle that the diapire of flow deflector 20 and upper header 1 is formed is the most suitable between 15-35 °, and the pressure distribution of whole upper header 1 is now the most suitable.
The shape of flow deflector can be straight plate shape, also can be the shape of arc.
As the embodiment that can replace, flow deflector can be cancelled, directly the top wall 21 of upper header 1 is set to skewed, as shown in Figure 6, lower tilt from the position of inlet tube towards upper header 1 extends, thus make in upper header 1, along the flow direction of fluid, fluid flow area reduces gradually from radiator inlet tube 18.
The top of upper header can be straight tabular, also can be arcuate structure.
Although the present invention discloses as above with preferred embodiment, the present invention is not defined in this.Any those skilled in the art, 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 be as the criterion with claim limited range.
Claims (1)
1. a radiator, comprise upper header and lower collector pipe and the finned tube being connected upper header and lower collector pipe, described finned tube comprises circular base tube and the first fin, the second fin, first fin and the second fin are arranged on the outside of base tube and the extended line of the first fin and the second fin intersects at the central axis of the base tube at the place, the center of circle of base tube, and the first fin and the second fin are along the first plane specular by base tube central axis; Described finned tube comprises the 3rd fin and the 4th fin, described 3rd fin, the 4th fin along the second plane respectively with the first fin and the second fin specular, described second plane and the first plane orthogonal and the central axis through base tube; Arrange the first brace between described first fin and the second fin, arrange the second brace between described 3rd fin and the 4th fin, the first brace and the second brace are circular arc type metallic plate; Second fin and the 4th fin of the first fin, the 3rd fin and adjacent fins pipe form space; The central axis at place, the center of circle of described circular arc-shaped metal plate and the central axes of base tube;
The inside of upper header arranges deflector, and the lower tilt of described deflector from the position of radiator inlet tube to upper header extends, and the circulation area of upper header inner fluid is reduced gradually along fluid flow direction;
Angle between described first fin and the second fin is A, and the length of the first fin and the second fin is L, and the outer radius of base tube is R, along base tube fin height H axially, meets following formula:
Sin(A/2)=a×(L/R)
2+b×(L/R)+c
H/(R×10)= e×Sin(A/2)
2-f×Sin(A/2)+h；
Wherein, A unit is angle, 60 ° of <A<110 °,
L is of a size of mm, 12mm<L<80mm,
The unit of R is mm, 10mm<R<80mm,
The unit of H is mm, 800mm<H<1200mm,
A, b, c, e, f, h are coefficient, and the scope of the scope of the scope of a to be the scope of 0.04-0.042, b be 0.266-0.28, c to be the scope of 0.36-0.37, e be 21-23, f is 44-45, h is 23-25;
It is characterized in that, the inside of base tube is provided with projection, and along the flow direction of fluid, protruding distribution is more and more closeer.
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| CN201410154672.8A CN103900401B (en) | 2013-09-30 | 2013-09-30 | Finned tube heat dissipation device with density of protrusions changing |
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| CN201410154672.8A CN103900401B (en) | 2013-09-30 | 2013-09-30 | Finned tube heat dissipation device with density of protrusions changing |
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| CN201310454535.1A Division CN103471430B (en) | 2013-09-30 | 2013-09-30 | Fin tube with bulges inside |
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| CN103900401B true CN103900401B (en) | 2015-04-22 |
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| JP2018169073A (en) * | 2017-03-29 | 2018-11-01 | 株式会社デンソー | Heat exchanger |
| CN109631419A (en) * | 2018-12-20 | 2019-04-16 | 广州美的华凌冰箱有限公司 | Heat-exchange device and refrigerator |
| CN113932279B (en) * | 2021-09-22 | 2022-12-02 | 浙江纳瓦斯工贸有限公司 | Die-casting aluminum radiator |
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| CN2478063Y (en) * | 2001-01-06 | 2002-02-20 | 营口港信铝材有限公司 | Fin hollowed aluminium alloy energy saving radiator |
| JP3811123B2 (en) * | 2002-12-10 | 2006-08-16 | 松下電器産業株式会社 | Double tube heat exchanger |
| WO2010089957A1 (en) * | 2009-02-05 | 2010-08-12 | パナソニック株式会社 | Heat exchanger |
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Effective date of registration: 20170509 Address after: 528411 Guangdong city of Zhongshan province Guangfeng Industrial Zone West sirloin Patentee after: Zhongshan Zymbo Electrical Appliance Manufacturing Co., Ltd. Address before: 266075 Shandong city of Qingdao province Fuzhou City Road No. 75 building A room 0201 Patentee before: Zhao Wei |