CN104380026A - Heat transfer pipe for fin-and-tube type heat exchanger, and fin-and-tube type heat exchanger - Google Patents
Heat transfer pipe for fin-and-tube type heat exchanger, and fin-and-tube type heat exchanger Download PDFInfo
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- CN104380026A CN104380026A CN201380031247.3A CN201380031247A CN104380026A CN 104380026 A CN104380026 A CN 104380026A CN 201380031247 A CN201380031247 A CN 201380031247A CN 104380026 A CN104380026 A CN 104380026A
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- Prior art keywords
- hole
- fin
- heat exchanger
- pipe
- transfer pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
- F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
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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
Provided are a heat transfer pipe for a fin-and-tube type heat exchanger and a fin-and-tube type heat exchanger using this heat transfer pipe, with which the refrigerant-side heat transfer efficiency can be improved effectively. Trapezoidal holes (20), which are formed in flat multi-hole tubes (14) comprising aluminum or an alloy thereof, are formed such that the length of the upper base is or less than the length of the lower base, the height of the hole is 0.5-0.8 times the thickness of the heat transfer pipe, and the ratio (D/h) of the hydraulic diameter D and the hole height h is in a range of 0.40-0.85, with the hydraulic diameter defined by dividing four times the cross-sectional area of the hole by the sum of the lengths of the sides of the hole. Flat multi-hole tubes (14) of this type are assembled together with fins (12) comprising aluminum or an alloy thereof to form a fin-and-tube type heat exchanger (10).
Description
Technical field
The present invention relates to fin-tube heat exchanger heat-transfer pipe and the fin-tube heat exchanger employing this fin-tube heat exchanger heat-transfer pipe, particularly relate to the heat-transfer pipe of the fin-tube heat exchanger in air conditioners such as being suitable for home-use air-conditioning, box-type air conditioner and employ the fin-tube heat exchanger of this heat-transfer pipe.
Background technology
All the time, except the idle call equipment use such as home-use air-conditioning, air conditioner for automobile, box-type air conditioner carry out except the heat exchanger of work as evaporimeter or condenser, in refrigerator, heat pump water heater etc., be also used as evaporimeter or condenser to carry out the heat exchanger of work, wherein, in home-use room conditioning, business box-type air conditioner, be generally used in the fin-tube heat exchanger of the structure of heat-transfer pipe being assembled fin most.
In addition; in recent years; from the viewpoint of Ozonosphere protection, prevent global warming etc.; also carrying out the freon series coolant that replaces in the past and make use of the exploitation of the heat exchanger of the lower natural refrigerant of the coefficient that warms; wherein; the water heater employing the cold-producing medium based on carbon dioxide receives publicity, and its exploitation advances, and the air heat exchanger of this water heater also uses fin-tube heat exchanger same as described above.
But the fin (outer surface fin) that what this fin-tube heat exchanger was practical typically use has been implemented predetermined processing is with heat-transfer pipe and the heat exchanger of the structure making this fin combine with heat-transfer pipe.And, in the heat exchanger being formed as this structure, while circulating in heat-transfer pipe by making cold-producing medium, the air as heat exchanging fluid being flowed to the direction at a right angle with heat-transfer pipe along fin, thus carry out heat exchange between cold-producing medium and air.
And as one of heat-transfer pipe used in this fin-tube heat exchanger, known having has and utilizes multiple partition wall to be the flat perforated pipe of the structure of multiple stream by the pipe inside division of flat pattern.In addition, this flat perforated pipe adopts the flat perforated pipe obtained by Splicing Mechanism (extrusion of Japanese: ポ ー ト ホ ー Le) aluminum or aluminum alloy usually, but as the cross sectional shape of this flat perforated pipe, such as Japanese Unexamined Patent Publication 6-142755 publication (patent document 1) clearly shown in, often use the flat perforated pipe stream of pipe inside being formed as quadrilateral shape.In addition, in this flat perforated pipe, the way increasing the surface area of stream is effective to raising heat exchange efficiency, therefore in Japanese Unexamined Patent Publication 5-222480 publication (patent document 2), specify that to be formed on the inner surface in the hole being formed as quadrilateral shape many small concavo-convex and increase the structure of surface area.By so increasing the surface area of stream, thus the contact area increased between the cold-producing medium of the internal circulation in hole and hole surface, by improving the thermal conductivity of refrigerant side, the thermal conductivity namely between raising cold-producing medium and heat-transfer pipe, thus achieve the raising of heat exchange efficiency.
But, when utilizing the extrusion moldings such as Splicing Mechanism aluminum or aluminum alloy to form flat perforated pipe, due to the concavo-convex size of the inner surface being formed at hole cannot be made enough little, therefore surface area cannot be increased fully.Particularly when reducing flat perforated pipe for the object such as make heat exchanger miniaturized, the hole formed also diminishes, and is therefore enough based on being made by this concavo-convex being formed surface area increase thus improving the effect of thermal conductivity not talkative.
In addition, in (c), the Japanese Unexamined Patent Publication 9-72680 publication (patent document 3) of Fig. 9 of above-mentioned patent document 1 (Japanese Unexamined Patent Publication 6-142755 publication), specify that and the hole cross sectional shape of flat perforated pipe is formed as triangular shaped content.Namely, in patent document 1, when carrying out the extrusion molding of antipriming pipe, only will extend the life-span of antipriming pipe extruding mould, the size improving product, precision as object, routine as of the hole shape using the antipriming pipe of the Mold Making of this antipriming pipe extruding, just list triangular shaped.In addition, in patent document 2, relate to a kind of porous flat tube, it obtains predetermined thickness and smooth surface by rolling or compression, and improve tensile strength by work hardening, suitable hardness and elasticity can be given, and specify that and make hole shape form the structure of the cross sectional shape of isosceles triangle as the structure of porous flat tube that can obtain this characteristic.
But, in these patent documents 1,3 clear and definite flat perforated pipes, just the simple hole shape by the antipriming pipe formed by extrusion process is formed as triangular cross-sectional shape, or only in order to improve the hardness of antipriming pipe, elasticity and its hole shape is defined the cross sectional shape of isosceles triangle.That is, for the thermal conductivity of leg-of-mutton concrete shape, heat-transfer pipe without any research.Further, like that when utilizing extrusion process to become triangular shaped by the hole shape being formed at flat perforated pipe, metal flow when there is extrusion process is carried out not smooth and is difficult to the problem of the manufacture view forming the triangular shaped hole of target.
prior art document
patent document
Patent document 1: Japanese Unexamined Patent Publication 6-142755 publication
Patent document 2: Japanese Unexamined Patent Publication 5-222480 publication
Patent document 3: Japanese Unexamined Patent Publication 9-72680 publication
Summary of the invention
the problem that invention will solve
At this, the present invention makes for background with this situation, its problem that will solve is to provide a kind of thermal conductivity, the fin-tube heat exchanger heat-transfer pipe that extrusion process performance is also excellent that effectively can improve refrigerant side, in addition, providing a kind of uses the fin-tube heat exchangers such as that this fin-tube heat exchanger heat-transfer pipe makes, air conditioner to be also the problem that it will solve.
for the scheme of dealing with problems
Therefore, in the present invention, in order to solve problem as above, its purport is to provide a kind of fin-tube heat exchanger heat-transfer pipe, it can assemble the fin be made up of aluminum or aluminum alloy, it is characterized in that, this fin-tube heat exchanger heat-transfer pipe is made up of aluminum or aluminum alloy, the antipriming pipe of overall flat cross sectional shape is formed, and the hole along axially extended many trapezoidal sectional shape of pipe being located at this antipriming pipe separates in the direction of the width and arranges in parallel to each other, and the upper base length in this hole is less than 1/2 of length of going to the bottom, the height in this hole is more than or equal to the length and be 0.5 times ~ 0.8 times of thickness of this antipriming pipe of going to the bottom, and be in the scope of 0.40 ~ 0.85 with the ratio D/h of the height h in hole by the hydraulic diameter D that the sectional area in this hole of 4 times defines divided by the length sum on the limit in this hole.
In addition, should be based on one of preferred technical scheme of fin-tube heat exchanger heat-transfer pipe of the present invention, the multiple adjacent hole being located at above-mentioned antipriming pipe arranges under the relation becoming mutually the trapezoidal sectional shape turned upside down.
And, one of another preferred technical scheme based on fin-tube heat exchanger heat-transfer pipe of the present invention is, the shape of cross section of above described holes is isosceles-trapezium-shaped, one of another preferred technical scheme is, the shape of cross section of above described holes to be the interior angle of going to the bottom to become with a kidney-shaped the be trapezoidal shape of 90 °.
And, in the present invention, its purport is also to provide a kind of fin-tube heat exchanger, it is assembled the fin that is made up of aluminum or aluminum alloy and is made up of aluminum or aluminum alloy, the antipriming pipe of overall flat cross sectional shape, it is characterized in that, above-mentioned antipriming pipe by the hole of the many trapezoidal sectional shape extended along tube axis direction in the direction of the width separately and arrange in parallel to each other and form, and the upper base length in this hole is less than 1/2 of length of going to the bottom, the height in this hole is more than or equal to the length and be 0.5 times ~ 0.8 times of thickness of this antipriming pipe of going to the bottom, and be in the scope of 0.40 ~ 0.85 with the ratio D/h of the height h in hole by the hydraulic diameter D that the sectional area in this hole of 4 times defines divided by the length sum on the limit in this hole.
In addition, according to one of this preferred technical scheme based on fin-tube heat exchanger of the present invention, as above-mentioned fin, use the plate-shaped fins of rectangle, and be fixed in the slit of the predetermined length arranged with opening mode by one end that above-mentioned multitube hole is embedded in this plate-shaped fins, thus this antipriming pipe and plate-shaped fins are fitted together.
And then, one of another preferred technical scheme based on fin-tube heat exchanger of the present invention is, as above-mentioned fin, use the corrugated fin of waveform shape, and by make this corrugated fin multiple and multiple above-mentioned antipriming pipe alternately laminated and be bonded with each other thus fit together.
the effect of invention
Thus, according to this fin-tube heat exchanger heat-transfer pipe formed based on the present invention, the hole being formed as trapezoidal sectional shape is with by the upper base of this trapezoidal shape and length ratio of going to the bottom, the ratio of the height in this hole and the thickness of heat-transfer pipe, and the mode that the hydraulic diameter D to be defined divided by the length sum on the limit in this hole by the sectional area in this hole of 4 times and the ratio D/h of the height h in hole are set in suitable scope is formed, therefore cold-producing medium is when the internal flow in the hole of heat-transfer pipe, the part that the angle of cold-producing medium in the position clipped by the base of trapezoidal sectional shape (going to the bottom) and waist is less, be formed the position that the upper base of the length of go to the bottom less than 1/2 and two waists clip etc., circulate in the narrower part in hole, increase with the area of the antipriming pipe inner face of the refrigerant contact of per unit volume thus, effectively can improve the thermal conductivity between cold-producing medium and heat-transfer pipe, the i.e. heat exchange efficiency of heat-transfer pipe.And cold-producing medium, by the narrower part in this hole, can form the flow regime of local, therefore, it is possible to more effectively improve heat exchange efficiency.
And, in the fin-tube heat exchanger heat-transfer pipe that should form based on the present invention, hole shape is formed as trapezoidal shape, therefore when manufacturing heat-transfer pipe by extrusion process, compared with the flat perforated pipe forming the hole of triangle with manufacture, be easy to produce metal flow, can be conducive to improving extrusion process performance.
And, use the fin-tube heat exchanger made by fin-tube heat exchanger heat-transfer pipe being formed as this structure, owing to beneficially improving the thermal conductivity of refrigerant side in heat-transfer pipe, therefore, it is possible to obtain higher heat exchange property, and be conducive to obtaining the miniaturization of heat exchanger, lightweight and manufacturing cost and reduce such effect.
Accompanying drawing explanation
Fig. 1 is the perspective illustration of the example represented based on fin-tube heat exchanger of the present invention.
Fig. 2 is the perspective illustration of the fin representing the fin-tube heat exchanger shown in pie graph 1.
A part for the cross section of the flat perforated pipe of the fin-tube heat exchanger shown in pie graph 1 is amplified the cross section key diagram represented by Fig. 3.
Fig. 4 is that outline represents that the master of the heat exchange property evaluation fin-tube heat exchanger used in an embodiment looks key diagram.
Fig. 5 represents the heat exchanger and the key diagram of the cross section of the flat perforated pipe prepared that formation uses in an embodiment, (a) of Fig. 5 represents that hole shape is the cross section of isosceles-trapezium-shaped, (b) of Fig. 5 represents hole shape to be interior angle that base becomes with a kidney-shaped is the cross section of the trapezoidal shape at right angle, and (c) of Fig. 5 represents the cross section with the trapezoidal shape of (b) different size of Fig. 5.
Fig. 6 represents in an embodiment in order to be configured for the heat exchanger that compares and the key diagram of the cross section of the flat perforated pipe prepared, (a) of Fig. 6 represents that the cross section of the hole shape of quadrangle form, (b) of Fig. 6 represent the cross section of round-shaped hole shape.
Fig. 7 represents that (a) of Fig. 7 and (b) of Fig. 7 represents the flat perforated pipe of the hole shape of the trapezoidal shape had beyond specification of the present invention respectively in an embodiment in order to be configured for the key diagram of the cross section of the flat perforated pipe that the heat exchanger that compares prepares further.
Detailed description of the invention
Below, in order to more specifically clear and definite the present invention, explain embodiments of the present invention with reference to accompanying drawing.
First, in FIG, one of embodiment that diagrammatically show the fin-tube heat exchanger employed based on fin-tube heat exchanger heat-transfer pipe of the present invention in a perspective view.At this, heat exchanger 10 is configured to be parallel to each other and assembly hole 16 internal fixtion separating the slit-shaped of multiple fins 12 of constant distance is engaged on this fin 12 and forms by being inserted in by two flat perforated pipes 14,14 to be located at.
In more detail, the aluminums such as the metal material that fin 12 is made up of aluminium or aluminium alloy as in the pastly, such as Japanese Industrial Standards JIS called after A1000 system, A3000 system, A7000 system are formed, also as shown in Figure 2, the plate-shaped fins of the thin-walled of rectangular flat shape is formed as.In addition, this fin 12 is formed with the assembly hole 16 for assembling flat perforated pipe 14, this assembly hole 16 is formed as from one end of the fin 12 of rectangular shape to the slit that the width of fin 12 (being left and right directions in fig. 2) extends.Further, around this assembly hole 16, be formed with the collar portion 18 of predetermined altitude with fin 12, this collar portion 18 is uprightly arranged with U-shaped.
On the other hand, as is well-known, flat perforated pipe 14 is formed by aluminums such as the metal materials utilizing aluminium or aluminium alloy to form, such as Japanese Industrial Standards JIS called after A1000 system, A3000 system, A6000 system, at this, flat perforated pipe 14 is formed with 10 holes 20 extended along tube axis direction, is made up of the antipriming pipe in flat pattern.At this, hole 20 is also as shown in Fig. 3 of being obtained by the partial enlargement of the cross section in the direction with pipe axes normal, so-called cross section, shape in trapezoid cross section, upper base length a in its two trapezoidal bases is formed as less than 1/2 of the length b that goes to the bottom, height h is more than or equal to the length b that goes to the bottom, further, the height H-shaped in this hole becomes the length of 0.5 times ~ 0.8 times of the thickness H of flat perforated pipe 14.So, at this, trapezoidal shape in this hole 20 is formed as following isosceles-trapezium-shaped: the length that the height h in hole and the length b that goes to the bottom forms identical length, upper base length a forms 1/2 of the length b that goes to the bottom, and the interior angle at the two ends of respective base (upper base, go to the bottom) is equal angles.In addition, as shown in the figure, under the form that be formed as the hole 20 of this shape, adjacent hole 20 is put upside down at above-below direction separately from each other, the width along flat perforated pipe 14 separates predetermined space ground and arranges in parallel to each other.
Further, in this hole 20, the hydraulic diameter D being configured to be defined divided by the length sum on the limit in hole by its sectional area of 4 times is in the scope of 0.40 ~ 0.85 with the ratio D/h of the height h in hole.That is, at this, due to hole 20 be configured to hole height h and upper base length a identical with the length b that goes to the bottom be go to the bottom length b 1/2 isosceles-trapezium-shaped, therefore D/h=0.84, is in the scope of the D/h of above-mentioned defined.
So, by the ratio to make trapezoidal upper base length a, the length b that goes to the bottom, the height h in hole and the thickness H of flat perforated pipe 14, the mode of the value also having the ratio D/h of the height h in hydraulic diameter D and hole to become in above-mentioned scope sets the hole shape in the hole 20 of flat perforated pipe 14, thus make the narrower part of cold-producing medium passing hole 20 effectively, increase with the area of the hole inner face of the refrigerant contact of per unit volume, be conducive to improving the thermal conductivity between cold-producing medium and heat-transfer pipe.In addition, cold-producing medium by the narrower part in this hole 20, thus produces the flow regime of local, therefore also more effectively can improve thermal conductivity.
But, in above-mentioned flat perforated pipe 14, when 1/2 or hole height h that upper base length a exceedes the length b that goes to the bottom be less than go to the bottom length b, because cold-producing medium is easily through in hole 20, the heat transfer therefore between cold-producing medium and heat-transfer pipe is difficult to carry out fully.In addition, when hole height h is less than 0.5 times of the thickness H of heat-transfer pipe, then generation hole becomes too small and is difficult to the problem of manufacture.On the other hand, when hole height h is greater than 0.8 times of the thickness H of heat-transfer pipe, the upper lower wall thickness of flat perforated pipe 14 became thin, also can be difficult to manufacture.In addition, preferred more than the 0.1mm of upper base length a of the trapezoidal shape in hole 20.This is because when this length a is less than 0.1mm, metal flow during extrusion process is worsened, and is difficult to manufacturing objective flat perforated pipe.
Further, being that when being less than 0.40 in the value of this D/h, hole 20 becomes too small in the pass of hydraulic diameter D and hole height h, being difficult to manufacture flat perforated pipe, is not therefore practical.On the other hand, when the value of D/h is greater than 0.85, the contact area of the cold-producing medium of per unit volume increases not, and the raising effect of thermal conductivity is difficult to advantageously play.
Therefore, use this flat perforated pipe 14 and fin 12, by these multiple fins 12 under the state making the assembly hole 16 being formed at each fin 12 respectively align to be parallel to each other and the mode separating constant distance is configured, also assemble regularly in assembly hole 16 after flat perforated pipe 14 is embedded in this alignment, thus form target fin-tube heat exchanger 10.In addition, as everyone knows, carry out the fixing assembling between this flat perforated pipe 14 and fin 12 by known various methods such as the joint by mechanical insertion (カ チ コ ミ), soldering or the adhesions by bonding agent, thus become the fin-tube heat exchanger of one.In addition, respective both ends as the flat perforated pipe 14 of the heat-transfer pipe of this fin-tube heat exchanger of formation are connected at this not shown collector, 10 holes 20 of flat perforated pipe 14,10 streams for cold-producing medium circulation namely extended along tube axis direction converge at entrance side and the outlet side of cold-producing medium respectively, form fin-tube heat exchanger 10.
Thus, be formed as this based in the fin-tube heat exchanger 10 of structure of the present invention, the shape being formed at the hole 20 of flat perforated pipe 14 is formed as contact area that the contact area that not only increases merely between cold-producing medium with hole inner face but also the cold-producing medium that can increase per unit volume contact and is conducive to the trapezoidal shape of the thermal conductivity improving refrigerant side, therefore in flat perforated pipe 14, heat exchange efficiency between the cold-producing medium of circulation in pipe and heat-transfer pipe improves effectively, its result, can improve the heat exchange property of heat exchanger 10 effectively.In addition, the hole 20 being formed at flat perforated pipe 14 by this is formed as trapezoidal shape, can be conducive to solving or avoid the metal flow when extrusion process to worsen thus the problem that processability is reduced, and plays higher extrusion process performance thus.Further, by the flat perforated pipe 14 of the thermal conductivity that so uses performance higher, can make that heat exchanger 10 is small-sized, lightweight, and also be conducive to playing and reduce the such effect of manufacturing cost.
Above, describe one of representational embodiment of the present invention in detail, but this is after all only illustrate, and is interpreted as, restrictively should explain the present invention by the concrete description of such embodiment.
Such as, in the above-described embodiment, the heat exchanger 10 of fin tube type formed exemplified with assembling flat perforated pipe 14 in the assembly hole 16 of fin 12 being located at tabular, but such as also can be set to as shown in Figure 4, the fin 24 of assembling corrugated (wavy) between flat perforated pipe 22,22 and form, the fin-tube heat exchanger 30 of corrugated fin formula.
In addition, the shape being formed at the hole 20 of flat perforated pipe 14 defines following isosceles-trapezium-shaped in the above-described embodiment: hole height h is identical with the length of the b that goes to the bottom, and upper base length a is 1/2 of the length b that goes to the bottom, and the interior angle at the two ends on respective base is formed as equal angles, but as long as the ratio D/h of the height h in hydraulic diameter D and hole is in the trapezoidal shape in predetermined scope of the present invention, except illustrative isosceles trapezoid, suitably can also select different trapezoidal of the angle of the interior angle at the two ends on base (going to the bottom), the interior angle that base (going to the bottom) becomes with a kidney-shaped is the various trapezoidal shape such as trapezoidal at right angle.Further, in illustrative trapezoidal shape, trapezoidal each limit (base, waist) is linearly, but as long as D/h meets above-mentioned relation, also can be formed as the limit of the arc-shaped with predetermined radius of curvature.
In addition, at this, the inner surface in this hole 20 is set to smooth face, but also can be the face being formed with small concavo-convex (groove, ridge).This concavo-convex by being formed, the contact area between the cold-producing medium of per unit volume and the surface in hole 20 can be increased further, more effectively can improve the thermal conductivity between cold-producing medium and heat-transfer pipe.
In addition, though do not enumerate, but the present invention is based on the knowledge of those skilled in the art, can implement being applied with in the modes such as various change, amendment, improvement, as long as and this embodiment does not depart from purport of the present invention certainly, just all belong to category of the present invention.
embodiment
Below, representational embodiment of the present invention is shown, more specifically clear and definite the present invention, but the present invention is not also subject to any restriction because of the record of such embodiment certainly.
First, as based on fin-tube heat exchanger heat-transfer pipe of the present invention, by carrying out extrusion process to aluminium alloy (Japanese Industrial Standards JISA3003), thus prepare the extruding flat perforated pipe 40 that in cross sectional shape as shown in (a) of Fig. 5, width W is 16mm, thickness H is 1.9mm, hole count is 12, it can be used as heat-transfer pipe No.1.The shape being located at 12 holes 42 of this heat-transfer pipe No.1 is set to the isosceles trapezoid that upper base a is 0.6mm, the b that goes to the bottom is 1.2mm, height h is 1.2mm (0.63 times of heat-transfer pipe thickness).In addition, each parameter such as hydraulic diameter as described in Table 1.In addition, in following table 1, hole height h represents the height in the hole on the thickness direction of flat perforated pipe 40, and flow path area represents the sectional area with the bore portion in each hole on axially vertical cross section, and hole Zhou Changdu represents the length on the limit in each hole on cross section.
In addition, as other examples based on fin-tube heat exchanger heat-transfer pipe of the present invention, prepare the flat perforated pipe 44,46 of the cross sectional shape as shown in (b) of Fig. 5 and (c) of Fig. 5, and respectively as heat-transfer pipe No.2, heat-transfer pipe No.3.At this, the extruding flat perforated pipe that heat-transfer pipe No.2 is width W is 16mm, thickness H is 1.9mm, hole count is 20, this hole shape is upper base is 0.1mm, go to the bottom as 0.7mm, the interior angle that highly becomes with a kidney-shaped for 1.5mm (0.79 times of heat-transfer pipe thickness), base (going to the bottom) are the trapezoidal shapes of 90 °.In addition, the extruding flat perforated pipe that heat-transfer pipe No.3 is width W is 16mm, thickness H is 1.9mm, hole count is 14, this hole shape is upper base is 0.4mm, go to the bottom as 0.7mm, the interior angle that highly becomes with a kidney-shaped for 1.5mm, base are the trapezoidal shapes of 90 °.That is, the width W of heat-transfer pipe 2, heat-transfer pipe 3 is identical with thickness H with the width W of heat-transfer pipe 1 with thickness H, but is the different flat perforated pipe of hole shape and hole count.In addition, this heat-transfer pipe No.2, No.3 is identically with heat-transfer pipe No.1 by carrying out extrusion process to make to aluminium alloy (Japanese Industrial Standards JISA3003).In addition, each parameter such as flow path area, hydraulic diameter of these heat-transfer pipes No.2, No.3 is in the lump shown in following table 1.
In addition, as the heat-transfer pipe for comparing, to prepare hole shape as shown in (a) of Fig. 6 be the flat perforated pipe 50 of quadrangle (length on one side is the square of 1mm) and the hole shape as shown in (b) of Fig. 6 is the flat perforated pipe 52 of circle (diameter is the circle of 1.2mm), respectively as heat-transfer pipe No.4, heat-transfer pipe No.5.And, although be trapezoidal shape as hole shape, but the value of D/h is in extraneous flat perforated pipe of the present invention, prepare the flat perforated pipe 54,56 of the hole shape formed as shown in (a) of Fig. 7 and (b) of Fig. 7, respectively as heat-transfer pipe No.6, heat-transfer pipe No.7.At this, the hole shape of heat-transfer pipe No.6 becomes upper base and is 0.2mm, goes to the bottom for 0.5mm, highly for 1.5mm (0.79 times of heat-transfer pipe thickness) and the interior angle that base becomes with a kidney-shaped is the trapezoidal shape of 90 °.In addition, the hole shape of heat-transfer pipe No.7 becomes upper base and is 0.8mm, goes to the bottom as 1.2mm, is highly trapezoidal shape that 1.2mm (0.63 times of heat-transfer pipe thickness) and the interior angle that base becomes with a kidney-shaped are 90 °.In addition, also identical with heat-transfer pipe No.1 ~ heat-transfer pipe No.3 by carrying out extrusion process to make to aluminium alloy (Japanese Industrial Standards JISA3003) for these heat-transfer pipes No.4 ~ heat-transfer pipe No.7, its width, thickness are all formed as the width W identical with heat-transfer pipe No.1: 16mm, thickness H:1.9mm.But about hole count, heat-transfer pipe No.4, heat-transfer pipe No.5, heat-transfer pipe No.7 are provided with 12 holes, and heat-transfer pipe No.6 is provided with 18 holes.In addition, each parameter such as flow path area, hydraulic diameter in these heat-transfer pipes No.4 ~ heat-transfer pipe No.7 is in the lump shown in following table 1.
[table 1]
(* 1): the interior angle that base becomes with a kidney-shaped is 90 ° trapezoidal
Then, use each flat perforated pipe (heat-transfer pipe No.1 ~ heat-transfer pipe No.7) so prepared, as shown in Figure 4, heat exchanger No.1 ~ heat exchanger No.7 is made as arranging multiple flat perforated pipe 22 in parallel to each other and engaging between adjacent flat perforated pipe 22,22 respectively with the heat exchanger (30) of the corrugated fin 24 of waveform shape formed machining.In addition, in this heat exchanger 30, the two ends of the flat perforated pipe 22 of arrangement are connected to collector 26, and axially extended each hole (stream) along flat perforated pipe 22 converges at entrance side and the outlet side of cold-producing medium respectively, defines the stream of cold-producing medium.In addition, in each heat exchanger 30 that this makes, the component that the solder brazing wafer processes that fin 24 all uses aluminium alloy, cover material core being employed JISA3703 system of Japanese Industrial Standards to employ Japanese Industrial Standards JISA4045 line aluminium alloy is corrugated, often make a heat exchanger, use 75 flat perforated pipes 24.In addition, joint between this fin 24 and flat perforated pipe 22 cools by the assembly of the shape of fin 24 and the stacked target heat exchanger 30 be assembled into of flat perforated pipe 22 being heated maintenance after 3 minutes (being up to Da Wendu) 600 DEG C in soldering oven, thus fin 24 and flat perforated pipe 22 are brazed and are bonded together.And the length of the flat perforated pipe 22 between collector 26,26 becomes 610mm, the overall size of heat exchanger 30 becomes width and is 650mm, is highly 610mm.
Afterwards, use the heat exchanger No.1 ~ heat exchanger No.7 so prepared, carry out the individual benchmark test of each heat exchanger.Test method is that each heat exchanger is arranged at the wind tunnel device being located at constant temperature and moisture test indoor, relative to the air themperature (dry bulb: 35 DEG C in laboratory; Wet bulb: 24 DEG C), wind speed (1.5m/s), cold-producing medium (R-410A) is set as recuperator inlet temperature: 64 DEG C (SH=20K), condensation temperature: 44 DEG C, heat exchanger outlet temperature: the condition of 39 DEG C (SC=5K), measures the heat exchange amount reaching thermally equilibrated state between air and cold-producing medium respectively.The result of the test in each heat exchanger is represented in following table 2.In addition, result of the test shown in this table 2 uses ratio when being set to 100 relative to the heat exchange amount of the heat exchanger No.4 being quadrangle by the hole shape of flat perforated pipe to represent.
[table 2]
Can confirm according to above result, but although in the contrast of different heat exchanger No.1, the heat exchanger No.4 of the roughly the same hole shape being formed at each flat perforated pipe of flow path area, heat exchanger No.5, be formed as being formed as the heat exchanger No.4 of quadrangle form based on heat exchanger No.1 and the hole shape of the hole shape of trapezoidal shape of the present invention, hole shape is formed as, compared with the heat exchanger No.5 of toroidal, improve condensation performance significantly.In addition, hole shape is used to be formed as trapezoidal shape and hydraulic diameter D and the ratio D/h of the height h in hole each heat exchanger No.1, the heat exchanger No.2 that are in flat perforated pipe 40,44,46 in scope of the present invention and form and heat exchanger No.3 and the hole shape of flat perforated pipe are formed as, compared with the heat exchanger No.4 of common quadrangle, can confirming the heat exchange property that all improve more than 2%.On the other hand, although be but that trapezoidal shape D/h exceeds extraneous heat exchanger No.6 of the present invention, heat exchanger No.7 about hole shape, confirm be formed as quadrangle form (square) with hole shape heat exchanger No.4 compared with, reduce performance, do not play the raising effect of the thermal conductivity of the refrigerant side of the flat perforated pipe brought by hole shape is formed as trapezoidal fully.
description of reference numerals
10, heat exchanger; 12, fin; 14, flat perforated pipe; 16, assembly hole; 18, collar portion; 20, hole.
Claims (7)
1. a fin-tube heat exchanger heat-transfer pipe, it can assemble the fin be made up of aluminum or aluminum alloy, it is characterized in that,
This fin-tube heat exchanger heat-transfer pipe is made up of aluminum or aluminum alloy, the antipriming pipe of overall flat cross sectional shape is formed, and the hole along the axially extended many trapezoidal sectional shape of pipe being located at this antipriming pipe separates in the direction of the width and arranges in parallel to each other, and the upper base length in this hole is less than 1/2 of length of going to the bottom, the height in this hole is more than or equal to the length and be 0.5 times ~ 0.8 times of thickness of this antipriming pipe of going to the bottom, and be in the scope of 0.40 ~ 0.85 with the ratio D/h of the height h in hole by the hydraulic diameter D that the sectional area in this hole of 4 times defines divided by the length sum on the limit in this hole.
2. fin-tube heat exchanger heat-transfer pipe according to claim 1, is characterized in that, the adjacent hole being located at many holes of above-mentioned antipriming pipe arranges with the relation becoming mutually the trapezoidal sectional shape turned upside down.
3. fin-tube heat exchanger heat-transfer pipe according to claim 1 and 2, is characterized in that, the shape of cross section of above described holes is isosceles-trapezium-shaped.
4. fin-tube heat exchanger heat-transfer pipe according to claim 1 and 2, is characterized in that, the shape of cross section of above described holes to be the interior angle of going to the bottom to become with a kidney-shaped the be trapezoidal shape of 90 °.
5. a fin-tube heat exchanger, its be assemble the fin that is made up of aluminum or aluminum alloy and be made up of aluminum or aluminum alloy, the antipriming pipe of overall flat cross sectional shape, it is characterized in that,
Above-mentioned antipriming pipe is formed separating in the direction of the width along the hole of managing axially extended multiple trapezoidal sectional shape and arrange in parallel to each other, and the upper base length in this hole is less than 1/2 of length of going to the bottom, the height in this hole is more than or equal to the length and be 0.5 times ~ 0.8 times of thickness of this antipriming pipe of going to the bottom, and is in the scope of 0.40 ~ 0.85 with the ratio D/h of the height h in hole by the hydraulic diameter D that the sectional area in this hole of 4 times defines divided by the length sum on the limit in this hole.
6. fin-tube heat exchanger according to claim 5, it is characterized in that, above-mentioned fin uses the plate-shaped fins of rectangle, and be fixed in the slit of the predetermined length arranged with opening mode by one end that above-mentioned multitube hole is embedded in this plate-shaped fins, thus this antipriming pipe and plate-shaped fins are fitted together.
7. fin-tube heat exchanger according to claim 5, is characterized in that, above-mentioned fin uses the corrugated fin of waveform shape, and by make this corrugated fin multiple and multiple above-mentioned antipriming pipe alternately laminated and be bonded with each other thus fit together.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-133856 | 2012-06-13 | ||
| JP2012133856 | 2012-06-13 | ||
| PCT/JP2013/062918 WO2013187156A1 (en) | 2012-06-13 | 2013-05-08 | Heat transfer pipe for fin-and-tube type heat exchanger, and fin-and-tube type heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104380026A true CN104380026A (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380031247.3A Pending CN104380026A (en) | 2012-06-13 | 2013-05-08 | Heat transfer pipe for fin-and-tube type heat exchanger, and fin-and-tube type heat exchanger |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6360791B2 (en) |
| KR (1) | KR20150030201A (en) |
| CN (1) | CN104380026A (en) |
| WO (1) | WO2013187156A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683830A (en) * | 2017-03-06 | 2017-05-17 | 常熟市友邦散热器有限责任公司 | Non-uniform oil duct sheet type radiator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101694670B1 (en) | 2015-03-31 | 2017-01-10 | (주)누리 | I-o pipe connecting member for heat exchanger |
| KR101694671B1 (en) | 2016-01-25 | 2017-01-10 | (주)누리 | Manufacturing method for heat exchanger with i-o pipe connecting member for heat exchanger |
| KR20160117376A (en) | 2016-06-09 | 2016-10-10 | (주)누리 | Manufacturing method for heat exchanger with i-o pipe connecting member for heat exchanger |
| KR102565006B1 (en) * | 2018-01-10 | 2023-08-10 | 주식회사 두원공조 | Condenser |
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| US6289981B1 (en) * | 1997-05-30 | 2001-09-18 | Showa Denko K.K. | Multi-bored flat tube for use in a heat exchanger and heat exchanger including said tubes |
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| JPS5149642Y2 (en) * | 1971-10-21 | 1976-11-30 | ||
| JPS6126978U (en) * | 1984-07-20 | 1986-02-18 | 昭和アルミニウム株式会社 | Heat exchanger |
| US7080683B2 (en) * | 2004-06-14 | 2006-07-25 | Delphi Technologies, Inc. | Flat tube evaporator with enhanced refrigerant flow passages |
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2013
- 2013-05-08 WO PCT/JP2013/062918 patent/WO2013187156A1/en active Application Filing
- 2013-05-08 KR KR20147034624A patent/KR20150030201A/en active IP Right Grant
- 2013-05-08 JP JP2014521023A patent/JP6360791B2/en active Active
- 2013-05-08 CN CN201380031247.3A patent/CN104380026A/en active Pending
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|---|---|---|---|---|
| US4729428A (en) * | 1984-06-20 | 1988-03-08 | Showa Aluminum Corporation | Heat exchanger of plate fin type |
| JPH06142755A (en) * | 1992-11-05 | 1994-05-24 | Nippondenso Co Ltd | Die for extruding multi-hole pipe and multi-hole pipe manufactured by using this die for extruding multi-hole pipe |
| US6289981B1 (en) * | 1997-05-30 | 2001-09-18 | Showa Denko K.K. | Multi-bored flat tube for use in a heat exchanger and heat exchanger including said tubes |
| JP2005351600A (en) * | 2004-06-14 | 2005-12-22 | Nikkei Nekko Kk | Aluminum heat exchanger and its scale deposition preventing method |
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| CN106683830A (en) * | 2017-03-06 | 2017-05-17 | 常熟市友邦散热器有限责任公司 | Non-uniform oil duct sheet type radiator |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20150030201A (en) | 2015-03-19 |
| JPWO2013187156A1 (en) | 2016-02-04 |
| WO2013187156A1 (en) | 2013-12-19 |
| JP6360791B2 (en) | 2018-07-18 |
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