Background technology
In recent years, aluminium alloy is used for the material substitution of copper and is seen and effect in the air conditioner industry, along with first has entered the product in market through the test of long-time running, the progressively maturation of verification technique, the aluminium alloy that can predict in the air-conditioning is used very fast spread for copper, and particularly the copper pipe in the heat exchanger is replaced by aluminium-alloy pipe.
Although existing production technology is the same with traditional copper pipe fin heat exchanger, and is all much bigger than copper pipe fin heat exchanger at the production difficulty of expand tube and welding sequence.Expand tube operation particularly, because generally than same specification copper pipe thick one times of the wall thickness of aluminium alloy radiating tube, reach same expand tube effect, needed expansive force is much bigger, and the great adverse effect such as expansive force is crossed that conference causes that little rib on the inside pipe wall face collapses seriously, expander roll flexural deformation or heat exchanger distortion are scrapped, the heat exchange efficiency of aluminum current compo pipe fin heat exchanger and production efficiency are put forward the reason of not coming up and are confined to just this.
See also Fig. 1 and Fig. 2, heat exchanger 100 ' on radiating tube 12 ' substitute copper pipe with aluminium-alloy pipe is had a natural advantage, be exactly aluminium-alloy pipe can with the fin unit 11 ' welding fabrication one that is all aluminium material, can avoid so the mechanical cold working of expand tube operation to the destruction of aluminium alloy radiating tube, therefore can design that the rib dental transition is high, the little rib of aluminium-alloy pipe inwall of arbitrary shape, at improving heat exchanging efficiency, strengthen heat exchanger and all have a clear superiority in aspect withstand voltage; Aluminium-alloy pipe is more much smaller than traditional expanded joint thermal contact resistance with the thermal contact resistance of fin unit welding manner in addition, can promote equally the heat exchange efficiency of heat exchanger integral body.
But traditional punched-type fin unit 11 ' and be not suitable for the heat exchanger integral solder, in the traditional heat exchangers expanded joint mode of production, for making things convenient for poling, fin unit 11 ' hole 110 ' internal diameter generally than the large 0.3~0.5mm of radiating tube external diameter, if directly use traditional wing formula welding, then this gap is excessive, and scolder can not fully be filled, do not guarantee welding effect, can affect poling again if reduce this gap.
Summary of the invention
The object of the present invention is to provide a kind of combined fin and heat exchanger, be intended to solve the deficiency of above-mentioned prior art, reach the heat exchange efficiency of riser fin heat exchanger and the purpose of production efficiency.
For achieving the above object, the technical solution used in the present invention is: a kind of combined fin is provided, comprise at least two monolateral fin units and at least one bilateral fin unit, described monolateral fin unit comprises monolateral fin unit body, described bilateral fin unit comprises bilateral fin unit body, two side portion of one side portion of described monolateral fin unit body and described bilateral fin unit body are provided with respectively a plurality of notch parts, turn over perpendicular to described monolateral fin unit or bilateral fin unit body and to the same side along the edge of each described notch part and to be provided with flange, between each described bilateral fin unit or the described notch part relative with the relative docking of side of two described monolateral fin units and two and flange jointly enclose and form a through hole that is used for wearing radiating tube.
Particularly, the boundary curve of described notch part be a center take described breach as initial point, with the conic section that the y axle distributes axisymmetricly, its curvilinear equation is
More specifically, 0<a=b.
Perhaps, more specifically, 0<a<b≤2a.
Preferably, each described notch part is equally distributed in the side portion of described monolateral fin unit and bilateral fin unit, and the described notch part dislocation that is positioned on the both sides of described bilateral fin unit is oppositely arranged.
Further, also be respectively equipped with a plurality of locating holes for the mutual contraposition of each described combined fin on each described monolateral fin unit body and each described bilateral fin unit body.
Preferably, each described locating hole lays respectively at positive downside or the positive upside of each described notch part.
Further, the position between two adjacent described notch parts also is provided with a plurality of slit bars on the described fin unit body.
The beneficial effect of combined fin provided by the invention is: compared with prior art, the combined fin of the present invention is combined to form by bilateral fin unit and the monolateral fin unit that is provided with notch part and flange, can it be clamped in the radiating tube periphery and carry out Integral welded by frock and form heat exchanger, be welded and fixed by aluminium solder between each fin unit and the aluminium alloy radiating tube, so just can avoid the operation of poling and expand tube in the heat exchanger production process, also can be so that the spacing that aluminium closes between radiating tube and the fin designs littlely, guarantee welding effect and heat transfer efficiency, can improve the production efficiency of heat exchanger simultaneously.
For achieving the above object, the technical solution used in the present invention is: a kind of fin-tube type heat exchanger is provided, it comprises fins set, described fins set is the above-mentioned stacked formation of combined fin, the center coaxial line of the through hole on each described combined fin and jointly form a radiating tube installation position, described fin-tube type heat exchanger also comprise many with the suitable aluminium alloy radiating tube of the shape of described through hole, each described aluminium alloy radiating tube is arranged in respectively in the described radiating tube installation position, the openend of two adjacent described aluminium alloy radiating tubes is connected to form a coolant path by the aluminium alloy tube connector, between described aluminium alloy radiating tube and each the described combined fin, all fixed-type by the aluminium solder integral solder between described aluminium alloy radiating tube and the described aluminium alloy tube connector.
Preferably, the spacing between the outer wall of the inwall of each described through hole and its interior described aluminium alloy radiating tube of insertion is 0.1-0.2mm.
Further, described fin-tube type heat exchanger also comprises two aluminium alloy side plates, each described aluminium alloy side plate is provided with a plurality of perforations that pass for each described aluminium alloy radiating tube, and the two ends of each described aluminium alloy radiating tube are fixed on the both sides of described fin-tube type heat exchanger by described aluminium alloy side plate.
Further, the openend that is in the described aluminium alloy radiating tube at described coolant path two ends is respectively equipped with a refrigerant input pipe and the refrigerant efferent duct that aluminium alloy is made, and fixes by the aluminium solder integral solder between described aluminium alloy radiating tube and described refrigerant input pipe and the refrigerant efferent duct.
The beneficial effect of fin-tube type heat exchanger provided by the invention is: owing to having adopted combinations thereof type fin, fin-tube type heat exchanger of the present invention does not need the operation of poling and expanded joint in process of production, and suitable integral solder moulding, can improve the heat exchange efficiency of heat exchanger, can improve its production efficiency again, its Integral welded mode of production can be that the single-piece heat exchanger advances the stove welding, also can be to go out the conjoined heat exchanger parts by the assembly unit of many rows disjunctor fin, after complete through the soldering furnace integral solder, use cutting equipment to cut the heat exchanger component that fin obtains single-piece by the row of demand, be fit to very much automated production, enhance productivity and disposable qualification rate.And, fin-tube type heat exchanger integral solder provided by the invention has avoided the mechanical cold working of expand tube operation in traditional expanded joint mode of production to the destruction of aluminium alloy radiating tube, therefore can design that the rib dental transition is high, the little rib of aluminium-alloy pipe inwall of arbitrary shape, at improving heat exchanging efficiency, strengthen and all have a clear superiority in aspect the withstand voltage and decay resistance of heat exchanger; Aluminium-alloy pipe is more much smaller than traditional expanded joint thermal contact resistance with the thermal contact resistance of fin welding manner in addition, can promote equally the heat exchange efficiency of heat exchanger integral body.
Description of drawings
Fig. 1 is fin structure schematic diagram in the prior art;
Fig. 2 is prior art heat exchanger structure schematic diagram;
The front view of bilateral fin unit in the combined fin that Fig. 3 provides for the embodiment of the invention one;
The side view of bilateral fin unit in the combined fin that Fig. 4 provides for the embodiment of the invention one;
The stereogram of bilateral fin unit in the combined fin that Fig. 5 provides for the embodiment of the invention one;
The stereogram of monolateral fin unit in the combined fin that Fig. 6 provides for the embodiment of the invention one;
The stereogram of the combined fin that Fig. 7 provides for the embodiment of the invention one;
The explosive view of the combined fin that Fig. 8 provides for the embodiment of the invention one;
The front view of bilateral fin unit in the combined fin that Fig. 9 provides for the embodiment of the invention two;
The stereogram of the combined fin that Figure 10 provides for the embodiment of the invention two;
The explosive view of the combined fin that Figure 11 provides for the embodiment of the invention two;
The explosive view of the fin-tube type heat exchanger that Figure 12 provides for the embodiment of the invention one;
The aluminium alloy radiating tube of the fin-tube type heat exchanger that Figure 13 provides for the embodiment of the invention two and the installation diagram of combined fin;
The stereogram of the fin-tube type heat exchanger that Figure 14 provides for the embodiment of the invention three;
Figure 15 is A place partial enlarged drawing among Figure 14.
The specific embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Please in the lump with reference to Fig. 3 to Figure 11, now combined fin 1 provided by the invention is described.Combined fin 1, comprise at least two monolateral fin units 12 and at least one bilateral fin unit 11, monolateral fin unit 12 comprises monolateral fin unit body, bilateral fin unit 11 comprises bilateral fin unit body 111, two side portion of one side portion of monolateral fin unit body and bilateral fin unit body 111 are provided with respectively a plurality of notch parts 110, turn over perpendicular to monolateral fin unit 12 or bilateral fin unit body 111 and to the same side along the edge of each notch part 110 and to be provided with flange 1101, between each bilateral fin unit 11 or the notch part 110 relative with the relative docking of side of two monolateral fin units 12 and two and flange 1101 jointly enclose and form a through hole 1100 that is used for wearing radiating tube.
Combined fin 1 provided by the invention is combined to form by bilateral fin unit 11 and the monolateral fin unit that is provided with notch part 110 and flange 1101, can it be clamped in the radiating tube periphery and carry out Integral welded by frock and form heat exchanger, be welded and fixed by aluminium solder between each fin unit and the aluminium alloy radiating tube 2, so just can avoid the operation of poling and expand tube in the heat exchanger production process, and can be so that the spacing that aluminium closes between radiating tube and the fin designs littlely, guarantee welding effect and heat transfer efficiency, can improve the production efficiency of heat exchanger simultaneously.
Embodiment one
See also Fig. 3 and Fig. 8, the present embodiment one provides combined fin 1, be combined to form by monolateral fin unit 12 and bilateral fin unit 11 these two kinds of fin units, monolateral fin unit 12 be exactly bilateral fin unit 11 longitudinally center line cut half of getting off.On fin on each fin unit jagged 110, turn over along notch part 110 edges and to be provided with flange 1101, wherein the boundary curve condition of notch part 110 be for a center take breach as initial point, with the conic section that the y axle distributes axisymmetricly, its curvilinear equation is
(y 〉=0 or y≤0).The breach of this curvilinear structures is convenient to processing, also is convenient to produce suitable with it radiating tube, certainly in other embodiments, also can be its curve.In the present embodiment, b=a〉0, then curvilinear equation is x
2+ y
2=a
2(y 〉=0 or y≤0) namely is the semicircle take a as radius.Like this with the notch part 110 of monolateral fin unit 12 and bilateral fin unit 11 and flange 1101 respectively in twos correspondence combine, notch part 110 and flange 1101 places can form a complete circle hole take a as radius.Particularly, each fin unit can be plain film, sheet or bridge sheet crack.Consult Figure 13, the outer surface cross section of the combined fin 1 applied aluminium alloy radiating tube 2 that corresponding this example provides all is the round tube take a as radius, is convenient to the processing and fabricating of seeking unity of standard.
See also Fig. 3 to Fig. 7, each notch part 110 is equally distributed in the side portion of monolateral fin unit 12 and bilateral fin unit 11, is convenient to like this produce the radiating tube that cooperates with it unified, standard, and especially " U " shape radiating tube is beneficial to and enhances productivity; Also be beneficial to simultaneously the even distribution of radiating tube, promote generally the exchange capability of heat of heat exchanger, notch part 110 dislocation that are positioned at simultaneously on the both sides of bilateral fin unit 11 are oppositely arranged, like this radiating tube located therein after, be positioned on the differing heights position of heat exchanger, do not block mutually each other, be convenient to carry out sufficient heat exchange with air-flow separately, thus improving heat exchanging efficiency.Also be respectively equipped with a plurality of locating holes 112 for each combined fin 1 mutual contraposition on each monolateral fin unit body and each monolateral fin unit body.The combined fin 1 of multi-disc is assembled into fins set and when welding with radiating tube, and these locating holes 112 are used for the location of frock and fixing; Preferably, each locating hole 112 lays respectively at positive downside or the positive upside of each notch part 110, guarantees accurately location, also is convenient to processing and fabricating.
Consult Fig. 3 and Fig. 6, the position on the fin unit body between two adjacent notch parts 110 also is provided with a plurality of slit bars 113, is used for the circulation of air-flow and increases heat exchange area, thereby be beneficial to distributing of heat, improves heat exchange efficiency.
Embodiment two
Consult Fig. 9 to Figure 11, the combined fin 1 that the present embodiment two provides is with the difference of Shi Liyi: the
flange 1101 curve conditions of the
notch part 110 of fin are: 0<a<b≤2a, in the present embodiment, and value b=1.5a〉0, then curvilinear equation is
Namely be take a as minor axis, 1.5a is the half elliptic of major axis, like this, the radiating tube heat transfer perimeter under identical circulation area that cooperates with it is long, heat exchange area is corresponding increase also, allows to arrange compactlyer on the structure, so that the heat exchange amount of unit volume increases, while a<b, so that the oval-shaped radiating tube that cooperates its use is larger at the area of dissipation on vertical, guarantee to contact fully with air-flow that side from radiator blows and carry out heat exchange, be beneficial to the lifting of radiating efficiency.Other is all identical with the first embodiment, does not repeat them here.Certainly in other embodiments, b also can be other arbitrary value among a~2a.Consult Figure 13, the outer surface cross section of the combined fin 1 applied aluminium alloy radiating tube 2 that corresponding this example provides all be take a as minor axis, 1.5a is the ellipse of major axis.This is because when fluid is plunderred along the transverse direction is horizontal, relatively moves behind the elliptical tube burble point, because the flow losses that Karman vortex street causes can reduce greatly, the whole windage of heat exchanger reduces in the Disengagement zone.Secondly, the elliptical tube heat transfer perimeter is long under identical circulation area, and heat exchange area is corresponding increase also, allows to arrange compactlyer on the structure, so that the heat exchange amount of unit volume increases.Both be conducive to allow heat exchanger strengthen overall heat exchange efficient.
The present invention also provides a kind of fin-tube type heat exchanger 100.See also Figure 12 to Figure 15, fin-tube type heat exchanger 100 comprises fins set, fins set is above-mentioned combined fin 1 stacked formation, the center coaxial line of the through hole 1100 on each combined fin 1 and jointly form a radiating tube installation position, fin-tube type heat exchanger 100 also comprise many with the suitable aluminium alloy radiating tube 2 of the shape of through hole 1100, each aluminium alloy radiating tube 2 is arranged in respectively in the radiating tube installation position, the openend of two adjacent aluminium alloy radiating tubes 2 is connected to form a coolant path by aluminium alloy tube connector 3, between aluminium alloy radiating tube 2 and each the combined fin 1, all fixed-type by the aluminium solder integral solder between aluminium alloy radiating tube 2 and the aluminium alloy tube connector 3.
Owing to having adopted combinations thereof type fin 1, fin-tube type heat exchanger 100 provided by the invention does not need the operation of poling and expanded joint in process of production, and suitable integral solder moulding, can improve the heat exchange efficiency of heat exchanger, can improve its production efficiency again, its Integral welded mode of production can be that the single-piece heat exchanger advances the stove welding, also can be to go out conjoined heat exchanger by the assembly unit of many rows disjunctor fin, after complete through the soldering furnace integral solder, use cutting equipment to cut the heat exchanger component that fin obtains single-piece by the row of demand, be fit to very much automated production, enhance productivity and disposable qualification rate.
Consult Figure 12, fin-tube type heat exchanger 100 also comprises two aluminium alloy side plates 6, each aluminium alloy side plate 6 is provided with a plurality of perforations that pass for each aluminium alloy radiating tube 2, and the two ends of each aluminium alloy radiating tube 2 are fixed on the both sides of fin-tube type heat exchanger 100 by aluminium alloy side plate 6.
See also Figure 12, the fin-tube type heat exchanger 100 that the combined fin 1 that provides for the use embodiment of the invention one is made, the outer surface cross section of each aluminium alloy radiating tube 2 all is the circle take a as radius, all be bent into U cast as shown in the figure, the openend of U-shaped aluminium alloy radiating tube 2 passes first the perforation on the aluminium alloy side plate 6, then the aluminium alloy radiating tube 2 of the aluminium solder coating that outer surface is covered with is close in itemize limit fin unit 12, the bilateral fin unit of row 11 corresponding breach and flange 1101 combinations of each aluminium alloy radiating tube 2 and two, the inwall of each flange 1101.The center of circle of the locating hole 112 of every adjacent two combined fins 1 is relative with one heart, by tool locating and fixing, after each parts assembly of heat exchanger is neat, aluminium-alloy pipe fin heat exchanger 100 is whole through the soldering furnace of temperature in the stove at 580~620 degrees centigrade, thereby each the parts welding of the aluminium solder coating that the tube outer surface of aluminium alloy radiating tube 2 is covered with fusing heat exchanger connects fastening, spacing control between the outer wall of the inwall of each through hole 1100 and its interior aluminium alloy radiating tube 2 of insertion can between 0.1~0.2mm, be far smaller than in the prior art with the distance between fin and the radiating tube surface in the heat exchanger of poling expansion-joint type production.
In the present embodiment, aluminium-alloy pipe fin heat exchanger 100 integral solder, avoided the mechanical cold working of expand tube operation in traditional expanded joint mode of production to the destruction of aluminium alloy radiating tube 2, therefore can design that the rib dental transition is high, the little rib of aluminium-alloy pipe inwall of arbitrary shape, at improving heat exchanging efficiency, strengthen and all have a clear superiority in aspect the withstand voltage and decay resistance of heat exchanger; Aluminium-alloy pipe is more much smaller than traditional expanded joint thermal contact resistance with the thermal contact resistance of fin welding manner in addition, can promote equally the heat exchange efficiency of heat exchanger integral body.
Further, see also Figure 12 and Figure 14, Figure 15, in the present embodiment, the openend that is in the aluminium alloy radiating tube 2 at coolant path two ends is respectively equipped with refrigerant input pipe 4 and the refrigerant efferent duct 5 that aluminium alloy is made, the openend of each aluminium alloy radiating tube 2 is straight tube, the internal diameter of refrigerant input pipe 4 and refrigerant efferent duct 5 is all greater than the external diameter of aluminium alloy radiating tube 2, refrigerant input pipe 4 and refrigerant efferent duct 5 are sheathed on the periphery of aluminium alloy radiating tube 2, fix by the aluminium solder integral solder between aluminium alloy radiating tube 2 and refrigerant input pipe 4 and the refrigerant efferent duct 5.
Consult Figure 13, the difference of the fin-tube type heat exchanger 100 that provides with previous embodiment is: the combined fin 1 that fin-tube type heat exchanger 100 fin that adopts that this example provides provides for the embodiment of the invention two, the outer surface cross section of its each aluminium alloy radiating tube 2 all be take a as minor axis, 1.5a is the ellipse of major axis.This is because when fluid is plunderred along the transverse direction is horizontal, relatively moves behind the elliptical tube burble point, because the flow losses that Karman vortex street causes can reduce greatly, the whole windage of heat exchanger reduces in the Disengagement zone.Secondly, the elliptical tube heat transfer perimeter is long under identical circulation area, and heat exchange area is corresponding increase also, allows to arrange compactlyer on the structure, so that the heat exchange amount of unit volume increases.Both be conducive to allow heat exchanger strengthen overall heat exchange efficient.
Consult Figure 14 and Figure 15, the combined fin 1 that the present invention proposes is applied in heat exchanger and can adopts a plurality of bilateral fin units 11.Like this, after aluminium-alloy pipe fin heat exchanger 100 assemblings among the first embodiment, welding, can adopt as required cutting equipment to cut out the single-piece heat exchanger component, further globality welding, reduce the production repetitive, adapt to automation, enhance productivity and quality conformance.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.