CN103697720B - Inner fin linear type closed finned tube radiator - Google Patents
Inner fin linear type closed finned tube radiator Download PDFInfo
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- CN103697720B CN103697720B CN201310726916.0A CN201310726916A CN103697720B CN 103697720 B CN103697720 B CN 103697720B CN 201310726916 A CN201310726916 A CN 201310726916A CN 103697720 B CN103697720 B CN 103697720B
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Abstract
The invention provides an inner fin linear type closed finned tube radiator. The radiator comprises an upper header, a lower header and a finned tube connected with the upper header and the lower header, wherein the inner wall of a parent tube is provided with fins; the heights of the fins are gradually increased along fluid flowing direction; the height of the highest fin is 1.05-1.1 times of that of the lowest fin. According to the inner fin linear type closed finned tube radiator, the structure of the finned tube is optimized, so that the heat exchange efficiency is maximum so as to save the energy resource, and the purpose of environmental protection and energy saving are achieved.
Description
Technical field
The invention belongs to field of heat exchangers, particularly relate to a kind of heating radiator, belong to F28D field.
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 modes such as heat transfer, radiation, convection current, heat is shed, allows the temperature in room get a promotion.
In radiator; current extensive use finned tubular radiator; 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 inner fin linear pattern closed finned tube radiator.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of inner fin linear pattern closed finned tube radiator, 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 of the central axis by base tube; 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 straight linear metallic plate; Second fin and the 4th fin of the first fin, the 3rd fin and adjacent fins pipe form space; Described base tube is straight tube, and the central axis of described adjacent base tube is parallel to each other;
The inwall of base tube arranges fin, and the height of described fin increases gradually on the direction of flowing along with fluid, and the highest fin height is minimum 1.05-1.1 times;
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))
f
Wherein, A unit is angle, 60 ° of <A<110 °,
L is of a size of mm, 15mm<L<80mm,
The unit of R is mm, 10mm<R<80mm,
The unit of H is mm, 600mm<H<1200mm,
A, b, c, e, f are coefficient, and the scope of the scope of the scope of a to be the scope of 0.038-0.04, b be 0.26-0.27, c to be the scope of 0.34-0.35, e be 0.72-0.78, f is between-3.6 to-3.5.
The optimum results of coefficient is: a is 0.0397, b be 0.02684, c is 0.03477.
Preferably, the distance between adjacent base tube central axis is d × (L+R) × sin (A/2), and wherein d is coefficient, and scope is 1.05-1.2.
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 does not have the length of finless parts to be greater than the length not having finless parts of close upper fin near the part of lower collector pipe.
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 and the central axes 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 that air is intensively to top convection current simultaneously, increases 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.
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.
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 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
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
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 base tube central axis 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 straight linear metallic plate.Described base tube is straight tube, and the central axis of described adjacent base tube 5 is parallel to each other.
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.
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.
Preferably, in one plane, in one plane, the plane at the first brace 8 and the second brace 12 place is parallel to each other for the second brace 12 of adjacent base tube 5 for the first brace 8 of described adjacent base tube 5.
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.This feature shows that finned tube arranges according to equidirectional.
Preferably, the size of all finned tubes is all identical.
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 distance of the first fin and the second fin 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 fin is along base tube fin height H axially, and 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))
f
Wherein, A unit is angle, 60 ° of <A<110 °,
L is of a size of mm, 15mm<L<80mm,
The unit of R is mm, 10mm<R<80mm,
The unit of H is mm, 600mm<H<1200mm,
A, b, c, e, f are coefficient, and the scope of the scope of the scope of a to be the scope of 0.038-0.04, b be 0.26-0.27, c to be the scope of 0.34-0.35, e be 0.72-0.78, f is between-3.6 to-3.5.
Preferably, the distance between adjacent base tube central axis is S=d × (L+R) × sin (A/2), and wherein d is 1.05-1.2.
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.
Wherein d is preferably 1.13.
If independent using a finned tube as a product, then be still applicable to above-mentioned formula.Such as:
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 fin is along base tube fin height H axially, and 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))
f
Wherein, A unit is angle, 60 ° of <A<110 °,
L is of a size of mm, 15mm<L<80mm,
The unit of R is mm, 10mm<R<80mm,
The unit of H is mm, 600mm<H<1200mm,
A, b, c, e, f are coefficient, and the scope of the scope of the scope of a to be the scope of 0.038-0.04, b be 0.26-0.27, c to be the scope of 0.34-0.35, e be 0.72-0.78, f is between-3.6 to-3.5;
By testing after result of calculation, by the numerical value of computation bound, the result of gained matches with formula substantially again, and error is substantially within 4%, and maximum relative error is no more than 6%, and mean error is 2%.
The result that coefficient is optimized: a is 0.0397, b be 0.02684, c be 0.03477, e be 0.7416, f is-3.545.
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 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.
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 (2)
1. an inner fin linear pattern closed finned tube radiator, 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 of the central axis by base tube; 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 straight linear metallic plate; Second fin and the 4th fin of the first fin, the 3rd fin and adjacent fins pipe form space; Described base tube is straight tube, and the central axis of described adjacent base tube is parallel to each other;
The inwall of base tube arranges fin, and the height of described fin increases gradually on the direction of flowing along with fluid, and the highest fin height is minimum 1.05-1.1 times;
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))
f
Wherein, A unit is angle, 60 ° of <A<110 °,
L is of a size of mm, 15mm<L<80mm,
The unit of R is mm, 10mm<R<80mm,
The unit of H is mm, 600mm<H<1200mm,
A, b, c, e, f are coefficient, and the scope of the scope of the scope of a to be the scope of 0.038-0.04, b be 0.26-0.27, c to be the scope of 0.34-0.35, e be 0.72-0.78, f is between-3.6 to-3.5.
2. finned tubular radiator according to claim 1, wherein a is 0.0397, b be 0.02684, c be 0.03477, e be 0.7416, f is-3.545.
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| CN201310726916.0A CN103697720B (en) | 2013-09-27 | 2013-09-27 | Inner fin linear type closed finned tube radiator |
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| CN201310726916.0A CN103697720B (en) | 2013-09-27 | 2013-09-27 | Inner fin linear type closed finned tube radiator |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310454769.6A Division CN103471426B (en) | 2013-09-27 | 2013-09-27 | Linear-type closed finned tube radiator |
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| CN103697720A CN103697720A (en) | 2014-04-02 |
| CN103697720B true CN103697720B (en) | 2015-04-01 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2432541Y (en) * | 2000-06-19 | 2001-05-30 | 李长运 | Radiator made of aluminium alloy carbon steel |
| CN201145499Y (en) * | 2007-12-05 | 2008-11-05 | 苏州昆拓冷机有限公司 | Case pipe heat exchanger |
| CN202470227U (en) * | 2012-03-14 | 2012-10-03 | 天津市亚格利散热器有限公司 | Copper-aluminum composite heat radiator heat radiating duct piece |
-
2013
- 2013-09-27 CN CN201310726916.0A patent/CN103697720B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2432541Y (en) * | 2000-06-19 | 2001-05-30 | 李长运 | Radiator made of aluminium alloy carbon steel |
| CN201145499Y (en) * | 2007-12-05 | 2008-11-05 | 苏州昆拓冷机有限公司 | Case pipe heat exchanger |
| CN202470227U (en) * | 2012-03-14 | 2012-10-03 | 天津市亚格利散热器有限公司 | Copper-aluminum composite heat radiator heat radiating duct piece |
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| CN103697720A (en) | 2014-04-02 |
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