EP2369284A2 - Heat exchanger, in particular for a condensation laundry dryer - Google Patents
Heat exchanger, in particular for a condensation laundry dryer Download PDFInfo
- Publication number
- EP2369284A2 EP2369284A2 EP11159327A EP11159327A EP2369284A2 EP 2369284 A2 EP2369284 A2 EP 2369284A2 EP 11159327 A EP11159327 A EP 11159327A EP 11159327 A EP11159327 A EP 11159327A EP 2369284 A2 EP2369284 A2 EP 2369284A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- tubes
- cooling air
- lamellar
- webs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009833 condensation Methods 0.000 title claims abstract description 7
- 230000005494 condensation Effects 0.000 title claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract 2
- 239000000853 adhesive Substances 0.000 claims description 32
- 230000001070 adhesive effect Effects 0.000 claims description 32
- 239000002184 metal Substances 0.000 claims description 4
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 241000446313 Lamella Species 0.000 abstract description 13
- 238000003475 lamination Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryersÂ
- D06F58/24—Condensing arrangements
-
- 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
-
- 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
- F28F1/126—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 consisting of zig-zag shaped fins
- F28F1/128—Fins with openings, e.g. louvered fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
- F28F3/027—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/02—Fastening; Joining by using bonding materials; by embedding elements in particular materials
- F28F2275/025—Fastening; Joining by using bonding materials; by embedding elements in particular materials by using adhesives
Definitions
- the present invention relates to a heat exchanger, in particular a heat exchanger of a condensation dryer according to the preamble of claim 1 and a condensation dryer.
- the heat exchanger block consists of four to seven flat tubes for guiding the process air and five to eight lamellae for the cooling air flowing perpendicular to the process air.
- These lamellar layers usually of the offset type, are connected to the tubes by gluing or brazing.
- the outer lamellar layers are covered by flat side parts.
- the front pipe ends are glued tight and tight in a frame made mostly of plastic. This bonding is usually carried out on the side facing the lamellar layers of the frame, in which by means of metering a thick adhesive bead between the walls of adjacent tubes and a web of the frame is placed.
- a lamellar layer is fastened on the upper side and the underside of the tubes, which stacked together form the height of a lamella forming a cooling air surface.
- the surface of the lamellar layer is greater than or equal to 7.0 in relation to the process air area. With such an area ratio a significant increase in performance of the heat exchanger is possible with the same space of the heat exchanger.
- the ratio between the height of the slats perpendicular to the cooling air surface and the cam pitch of the slats is greater than or equal to 2.4 according to a particular embodiment variant.
- the lamellar layers are formed according to a further advantageous embodiment as rolled lamellar layers.
- this requires to achieve the predetermined conditions between cooling air surface and process air surface or between fin height and cam pitch a larger number of lamellae, but has the great advantage that the lamellae can be made faster by rolling.
- rolls made by rolling much thinner materials can be used and thus the cost of materials can be reduced.
- the front ends of the tubes are flared conical and accordingly molded, provided with an adhesive and extending in the cooling air flow direction webs of the holding frame attachable.
- a conical widening here is not only an expansion in the sense of a straight-line trapezoidal design to understand, but for example, a curved shape shape, for example, similar to a ParabelfuĂźes, or even a stepped expansion.
- the lamellar layer can be brought closer to the front ends of the pipes, since the space for introducing the adhesive metering pipes is no longer needed, so that thereby the usable cooling air surface and also the process air surface formed by the individual lamellae of the lamellar layers is enlargeable, which is associated with an increase in the performance of the heat exchanger.
- the described type of bonding a significant amount of adhesive.
- the lamellar layers extend to the conically widened areas of the tubes, which is accompanied by an increase in the process air area and thus an increase in performance with the same installation space of the heat exchanger.
- the webs of the holding frame on conically shaped walls, which open into respective filled with the adhesive grooves.
- a parallel to the outer walls of the webs extending inner web are integrally formed in the webs of the support frame, wherein the filled with the adhesive grooves are bounded by a wall of the inner web and the conically shaped wall.
- the lamellar layers are glued to the top or bottom of the tubes, whereby also the production costs can be kept low.
- the tubes are preferably stacked loosely on top of each other in the region of the lamellar layers attached to them.
- the block of a heat exchanger from the cooling air surface forming tubes for passing dry cooling air in a cooling air flow direction, wherein on the respective top and bottom of the tubes in each case a lamellar layer is attached.
- top, bottom, left, right, front, back, etc. refer exclusively to the exemplary representation and position of the heat exchanger and other parts selected in the respective figures. These terms are not intended to be limiting, that is to say, by different working positions or the mirror-symmetrical design or the like, these references may change.
- FIG. 1 shows a heat exchanger 1 with a plurality of here five, designed as individual tubes tubes 2, which are arranged parallel to each other and in a plurality of planes at a distance above each other. Also conceivable is an arrangement of several, parallel juxtaposed rows of tubes 2. Between the or above and below the tubes (s) 2 each have a lamellar layer 3 is arranged. The uppermost lamellar layer 3 and the lowest lamellar layer 3 are covered by a sheet-metal side part 8. The tubes 2 are thereby traversed by moist process air in a first direction indicated by an arrow PL, while dry cooling air flows through the laminar layers 3 in a second direction indicated by the arrow KL.
- moist process air in a first direction indicated by an arrow PL
- dry cooling air flows through the laminar layers 3 in a second direction indicated by the arrow KL.
- Cooling air surface is understood to be the heat-exchanging surface which is in direct contact with the flowing cooling air and consists of the sum of the tube outer surfaces which are not covered by adhesive or lamella cams and the surfaces of the lamellar cams which extend more or less parallel to the outer surface of the tubes 2 in particular the surfaces of the lamellar flanks protruding from the tube surfaces.
- the outer surfaces of the narrow sides of the pipe lying in the inflow or outflow region of the cooling air likewise belong to the cooling air surface.
- the cooling air surface includes the proportions of the tube outer or lamellar surfaces, which are covered with adhesive or lie directly on or against each other, so that they can not be flown by cooling air.
- the cooling air surface also does not include flowed-on surfaces of the side parts 28 as well as directly covered outer lamella surfaces.
- the process air surface is the sum of all acted upon by the process air inner surfaces of the tubes 2, the outside of which is flowed by cooling air or provided with fins.
- the process air surface does not include the pipe ends 26 fastened in the frame 4.
- the tubes 2 are to the lamellar layers 3 preferably in the manner of a cross-flow heat exchanger, ie perpendicular to each other, aligned.
- FIG. 2 shows a section of a slat layer 3, which is preferably designed as an "offset slat", with a height H and a cam pitch NT.
- This lamella has sections 9 in the direction of air flow, through which the lamellar surfaces, which are parallel in the flow direction, are offset by approximately a quarter of a cam pitch in order to break the flow boundary layer and thus improve the heat transfer.
- the ratio between the height H of the lamination layer 3 and the cam pitch NT of the lamination layer 3 is preferably greater than or equal to 2.4.
- the lamellar layers 3 are formed in the direction of flow substantially rectangular and attached to the rectangular narrow sides of the respective tube 2, in particular glued or soldered.
- a design of the lamellar layers 3 in, for example, triangular or rounded shape is also conceivable.
- FIG. 3 shows in the upper part of the upper half of a conventional heat exchanger in cross section. It can be seen that the pipe ends 11 on the lamellar layers 3 facing sides by means of an adhesive 12 tightly and firmly connected to the frame 4, 5. This adhesive is dosed during installation of the heat exchanger 1 after attaching the frame to the pipe ends 11 by retracting dosing into a free space 13 between the pipe ends and the frame 4. This type of bonding requires comparatively much adhesive. Furthermore, the lamellar layer can not be brought up to the holding frame 4, 5, since the free space for Adhesive dosing is required during assembly. This clearance is also an undesirable bypass for the cooling air to be passed through the laminar layer 3.
- FIG. 3 shows in the same scale a mirrored upper part of a heat exchanger according to the invention 1.
- the lamellar layers 3 can be brought up to the support frame 4, 5.
- the frontal ends 16 of the tubes 2 are a curved shape shape, for example, similar to a parabolic foot, or even stepped or stepped expanded. Accordingly, the webs 18 of the holding frame 4 are formed in these conceivable variants.
- FIG. 4 shows a perspective view of a heat exchanger block 10, which consists of several, forming a cooling air surface, metallic lamellae 3 for passing dry cooling air in the cooling air flow direction KL and arranged between each of the lamellae layers 3, forming a process air surface tubes 2 for passing moist process air in the process air flow direction PL.
- the front ends 16 of the tubes 2 are flared, preferably by about 10 ° to 30 ° to the cooling air flow direction KL.
- the Figures 5 and 6 serve to illustrate the assembly of the pipe ends to the support frame 4, 5.
- the frame 4, 5 has webs 18, which have conically shaped walls 19 which open into respective filled with the adhesive 12 grooves 17.
- each one parallel to the outer walls of the web 18 extending inner web 20 is formed, wherein the stuffed with the adhesive 12 grooves 17 are bounded by a wall of the inner web and the conically shaped wall 19.
- the adhesive 12 can be dosed in a minimum necessary amount.
- pocket-shaped bulges 21 are formed in the conically shaped walls 19 of the webs 18, which ensure a uniform distribution of the adhesive 12 between the web 19 and the pipe inner surface 22 after pushing the pipe end 16, so as to ensure the best possible strength and tightness of this bond to care.
- FIG. 6 a pipe end inserted into the holding frame 4 is shown in the mounted or glued state.
- the webs 19 and the tube expansion are preferably coordinated so that a good investment of both parts is generated, optionally with a generated by spatial overlapping strain on lying in the tube opening ends 26 of the webs 19, in particular an accumulation of lint in this Effectively prevent the area.
- FIG. 7 a further particular embodiment variant of a heat exchanger block of a heat exchanger 1 according to the invention is shown.
- this block is not formed in one piece from a number x of tubes and a number x + 1 of slats and two side panels 8 by gluing or soldering, but of individual elements 23, each of which a tube 24 and two attached to this, in particular glued or soldered lamellae layers 25 which are arranged one above the other to form the heat exchanger block 10.
- FIG. 8 shows the in FIG. 7 illustrated heat exchanger block in the assembled state.
- the outermost lamellar layer are covered by side parts 28, which can be made as in the embodiment described above from sheet metal or, for example, plastic as injection molding or extrusion parts.
- the side parts 28 are preferably loosely on the tube-fin elements 23 and are fixed in the frame 4 by plug or snap connections.
- FIGS. 1 to 7 While in the FIGS. 1 to 7 are shown produced by punching, are in the FIGS. 8 to 10 shown lamination layers 25a, 25b produced by rolling. As a result, thinner sheets can be used as starting materials for the lamination layers 25a, 25b.
- Fig. 9 shows an element 23 with a particularly advantageous form of Lamella layers 25a, which is connected by adhesive 31 to the tube 2.
- the lamellae lobes 29 have the largest possible contact surface with the tube wall 30, to compensate for the disadvantage of a comparatively poor thermal conductivity of a preferably organic adhesive 31 with respect to a metallic solder joint.
- FIG. 10 Two particularly advantageous variants of a lamination layer 25a, 25b are in FIG. 10 shown.
- the radius r of the cam is set to be larger than a quarter of the cam pitch NT but smaller than two-fifths of the cam pitch NT.
- the width of the cam is larger than half of the pitch NT, but smaller than two-fifths of the pitch NT.
- the total height h of the slats is made up of two superimposed lamellar layers 25a, 25b together, as in FIG. 8 is shown.
Abstract
Description
Die vorliegende Erfindung betrifft einen Wärmetauscher, insbesondere einen Wärmetauscher eines Kondensations-Wäschetrockners gemäß dem Oberbegriff des Anspruchs 1 sowie einen Kondensations-Wäschetrockner.The present invention relates to a heat exchanger, in particular a heat exchanger of a condensation dryer according to the preamble of
Gattungsgemäße Wärmetauscher für Kondensations-Wäschetrockner sind in zahlreichen Ausführungsvarianten aus dem Stand der Technik bekannt. Bei den heutigen verklebten oder gelöteten Wärmetauschern besteht der Wärmetauscherblock aus vier bis sieben flachen Rohren zur Führung der Prozeßluft sowie aus fünf bis acht Lamellenschichten für die senkrecht zur Prozeßluft strömende Kühlungsluft. Diese Lamellenschichten, meist vom Typ Offset, sind mit den Rohren durch Kleben oder Hartlöten verbunden. Die äußeren Lamellenschichten werden dabei durch flache Seitenteile abgedeckt. Die stirnseitigen Rohrenden sind in einem meist aus Kunststoff bestehenden Rahmen dicht und fest verklebt. Diese Verklebung erfolgt in der Regel auf der den Lamellenschichten zugewandten Seite der Rahmen, in den mittels Dosierrohren eine dicke Klebstoffraupe zwischen die Wände benachbarter Rohre und einen Steg des Rahmens gelegt wird.Generic heat exchangers for condensation dryer are known in numerous variants of the prior art. In today's glued or soldered heat exchangers, the heat exchanger block consists of four to seven flat tubes for guiding the process air and five to eight lamellae for the cooling air flowing perpendicular to the process air. These lamellar layers, usually of the offset type, are connected to the tubes by gluing or brazing. The outer lamellar layers are covered by flat side parts. The front pipe ends are glued tight and tight in a frame made mostly of plastic. This bonding is usually carried out on the side facing the lamellar layers of the frame, in which by means of metering a thick adhesive bead between the walls of adjacent tubes and a web of the frame is placed.
Dadurch ist eine schnelle, aber vergleichsweise viel Klebstoff verbrauchende Fertigung solcher Wärmetauscher ermöglicht. Die wärmetechnisch nutzbare Länge der Lamellenschicht wird durch den zur Dosierung des Klebstoffes benötigten Freiraum eingeschränkt, was die Leistung des Wärmetauschers reduziert.This allows a fast, but comparatively much adhesive-consuming production of such heat exchangers. The heat technically usable length of the lamellar layer is limited by the space required for metering the adhesive space, which reduces the performance of the heat exchanger.
Um die wärmetechnisch nutzbare Länge der Lamellenschicht zu erhöhen, ist es bekannt, die stirnseitigen Rohrenden auf der der Lamellenschicht abgewandten Seite des Rahmens zu verkleben. Dieses Verkleben ist allerdings sehr aufwändig, da hier die Gefahr besteht, dass ein Teil des Klebstoffs in die Rohrenden eindringt.In order to increase the heat technically usable length of the lamellar layer, it is known to glue the front end pipe ends on the side facing away from the lamellar layer of the frame. However, this bonding is very complex, since there is the danger that a part of the adhesive penetrates into the tube ends.
Aus der
Diese Aufgabe wird durch einen Wärmetauscher mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a heat exchanger with the features of
Erfindungsgemäß sind auf der Oberseite und der Unterseite der Rohre jeweils eine Lamellenschicht befestigt, die aufeinandergestapelt die Höhe einer Kühlluftfläche bildenden Lamelle ergeben. Die Oberfläche der Lamellenschicht ist dabei im Verhältnis zur Prozessluftfläche größer oder gleich als 7,0. Mit einem solchen Flächenverhältnis ist bei gleichem Bauraum des Wärmetauschers eine deutliche Leistungssteigerung des Wärmetauschers ermöglicht.According to the invention, in each case a lamellar layer is fastened on the upper side and the underside of the tubes, which stacked together form the height of a lamella forming a cooling air surface. The surface of the lamellar layer is greater than or equal to 7.0 in relation to the process air area. With such an area ratio a significant increase in performance of the heat exchanger is possible with the same space of the heat exchanger.
Vorteilhafte AusfĂĽhrungsvarianten der Erfindung sind Gegenstand der UnteransprĂĽche.Advantageous embodiments of the invention are the subject of the dependent claims.
Zur Erreichung dieses Flächenverhältnisses ist gemäß einer besonderen Ausführungsvariante das Verhältnis zwischen der Höhe der Lamellen senkrecht zur Kühlluftfläche und der Nockenteilung der Lamellen größer oder gleich 2,4.To achieve this area ratio, the ratio between the height of the slats perpendicular to the cooling air surface and the cam pitch of the slats is greater than or equal to 2.4 according to a particular embodiment variant.
Durch eine derartig große Lamellenhöhe ist es ermöglicht, die Anzahl der Lamellen und auch die Anzahl der Rohre eines Wärmetauscherblocks zu reduzieren, was mit deutlich geringeren Fertigungskosten einhergeht.Such a large slat height makes it possible to reduce the number of slats and also the number of tubes of a heat exchanger block, which is associated with significantly lower production costs.
Die Lamellenschichten sind gemäß einer weiteren vorteilhaften Ausgestaltung als gewalzte Lamellenschichten ausgebildet. Dies bedingt zwar zur Erreichung der vorgegebenen Verhältnisse zwischen Kühlluftfläche und Prozeßluftfläche bzw. zwischen Lamellenhöhe und Nockenteilung eine größere Anzahl von Lamellennocken, hat aber den großen Vorteil, dass die Lamellen durch Walzen schneller gefertigt werden können. Außerdem können für durch Walzen hergestellte Lamellen wesentlich dünnere Materialien verwendet und somit die Materialkosten gesenkt werden.The lamellar layers are formed according to a further advantageous embodiment as rolled lamellar layers. Although this requires to achieve the predetermined conditions between cooling air surface and process air surface or between fin height and cam pitch a larger number of lamellae, but has the great advantage that the lamellae can be made faster by rolling. In addition, for rolls made by rolling much thinner materials can be used and thus the cost of materials can be reduced.
Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung sind die stirnseitigen Enden der Rohre konisch aufgeweitet und auf entsprechend geformte, mit einem Klebemittel versehene und sich in Kühlluftströmungsrichtung erstreckende Stege der Halterahmen aufsteckbar. Unter einer konischen Aufweitung ist hier nicht nur eine Aufweitung im Sinne einer geradlinigen trapezförmigen Gestaltung zu verstehen, sondern beispielsweise auch eine gebogene Formgestalt, beispielsweise ähnlich eines Parabelfußes, oder auch eine treppenförmige Aufweitung. Durch die konische Aufweitung der Rohrenden kann zum einen die Lamellenschicht näher an die stirnseitigen Enden der Rohre herangeführt werden, da der Raum zum Einführen der Klebstoffdosierrohre nicht mehr benötigt wird, so dass dadurch die nutzbare Kühlluftfläche und auch die durch die einzelnen Lamellen der Lamellenschichten gebildeten Prozeßluftfläche vergrößerbar ist, was mit einer Erhöhung der Leistung des Wärmetauschers einhergeht. Außerdem kann durch die beschriebene Art der Verklebung eine erhebliche Menge an Klebemittel eingespart werden.According to a further advantageous embodiment of the invention, the front ends of the tubes are flared conical and accordingly molded, provided with an adhesive and extending in the cooling air flow direction webs of the holding frame attachable. Under a conical widening here is not only an expansion in the sense of a straight-line trapezoidal design to understand, but for example, a curved shape shape, for example, similar to a Parabelfußes, or even a stepped expansion. Due to the conical widening of the pipe ends, on the one hand the lamellar layer can be brought closer to the front ends of the pipes, since the space for introducing the adhesive metering pipes is no longer needed, so that thereby the usable cooling air surface and also the process air surface formed by the individual lamellae of the lamellar layers is enlargeable, which is associated with an increase in the performance of the heat exchanger. In addition, can be saved by the described type of bonding a significant amount of adhesive.
Gemäß einer weiteren Ausgestaltung der Erfindung erstrecken sich die Lamellenschichten bis an die konisch aufgeweiteten Bereiche der Rohre, was mit einer Erhöhung der Prozeßluftfläche und damit einer Leistungserhöhung bei gleichem Bauraum des Wärmetauschers einhergeht.According to a further embodiment of the invention, the lamellar layers extend to the conically widened areas of the tubes, which is accompanied by an increase in the process air area and thus an increase in performance with the same installation space of the heat exchanger.
Gemäß einer weiteren Ausgestaltung der Erfindung weisen die Stege der Halterahmen konisch geformte Wandungen auf, die in jeweilige mit dem Klebemittel angefüllte Rinnen münden. Insbesondere sind in den Stegen der Halterahmen jeweils ein parallel zu den Außenwänden der Stege verlaufende Innensteg angeformt, wobei die mit dem Klebemittel angefüllten Rinnen durch eine Wand des Innenstegs und der konisch geformten Wandung begrenzt sind. Dadurch sind die mit Klebemittel angefüllten Rinnen derart geformt, dass mit einer minimalen Menge an Klebemittel die Rohrenden sicher an dem Halterahmen verklebbar sind.According to a further embodiment of the invention, the webs of the holding frame on conically shaped walls, which open into respective filled with the adhesive grooves. In particular, in each case a parallel to the outer walls of the webs extending inner web are integrally formed in the webs of the support frame, wherein the filled with the adhesive grooves are bounded by a wall of the inner web and the conically shaped wall. As a result, the channels filled with adhesive are shaped such that with a minimal amount of adhesive, the pipe ends can be securely bonded to the support frame.
In den konisch geformten Wandungen der Stege sind vorzugsweise taschenförmige Ausbuchtungen zur gleichmäßigen Verteilung des Klebemittels zwischen den Wandungen der Stege und den Innenflächen der stirnseitigen Enden der Rohre angeformt. Dadurch wird eine bestmögliche Festigkeit und Dichtheit der Verklebung der Rohrenden mit dem Halterahmen ermöglicht.In the conically shaped walls of the webs preferably pocket-shaped bulges for uniform distribution of the adhesive between the walls of the webs and the inner surfaces of the front ends of the tubes are integrally formed. As a result, the best possible strength and tightness of the bonding of the pipe ends is made possible with the holding frame.
Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung sind die Lamellenschichten auf der Oberseite bzw. Unterseite der Rohre angeklebt, wodurch ebenfalls die Herstellungskosten niedrig gehalten werden können. Die Rohre sind dabei im Bereich der an ihnen befestigten Lamellenschichten vorzugsweise lose aufeinander liegend gestapelt.According to a further advantageous embodiment of the invention, the lamellar layers are glued to the top or bottom of the tubes, whereby also the production costs can be kept low. The tubes are preferably stacked loosely on top of each other in the region of the lamellar layers attached to them.
Gemäß einer weiteren Ausführungsvariante besteht der Block eines Wärmetauschers aus den eine Kühlluftfläche bildenden Rohren zur Durchleitung trockener Kühlluft in einer Kühlluftströmungsrichtung, wobei auf der jeweiligen Oberseite und Unterseite der Rohre jeweils eine Lamellenschicht befestigt ist. Dadurch können Lamellenschichten von gegenüber den oben angeführten Ausführungsvarianten halbierter Höhe auf den Rohrseiten befestigt, insbesondere verklebt oder verlötet werden, wobei durch Aufeinanderstapeln dieser Elemente sich die Lamellenhöhe zwischen den einzelnen Rohren wieder zu einer Gesamtlamellenhöhe wie in den oben beschriebenen Ausführungsbeispielen addiert und somit die gleiche Leistungssteigerung erzielbar ist.According to a further embodiment, the block of a heat exchanger from the cooling air surface forming tubes for passing dry cooling air in a cooling air flow direction, wherein on the respective top and bottom of the tubes in each case a lamellar layer is attached. As a result, lamellar layers of opposite the above-mentioned embodiments halved height on the tube sides are fixed, or glued in particular soldered by stacking these elements, the lamella height between the individual tubes back to a total lamella height as in the embodiments described above and thus the same performance increase is achievable.
Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der beiliegenden Zeichnungen näher erläutert. Es zeigen:
Figur 1- eine perspektivische Darstellung einer Ausführungsvariante eines erfindungsgemäßen Wärmetauschers,
Figur 2- eine perspektivische Darstellung eines Teils einer erfindungsgemäßen Lamellenschicht,
Figur 3- zwei Seitenschnittansichten zum Vergleich eines herkömmlichen Wärmetauschers zu einem Ausführungsbeispiel eines erfindungsgemäßen Wärmetauschers,
Figur 4- eine perspektivische Ansicht eines Wärmeblocks eines Wärmetauschers mit konisch aufgeweiteten Rohrenden,
Figur 5- eine perspektivische Darstellung der Rohrenden und Lamellenschichten vor der Montage der Rohrenden an dem Halterahmen,
Figur 6- eine Detailansicht der mit dem Rahmen des in
gezeigten Ausführungsbeispiels des erfindungsgemäßen Wärmetauschers verklebten Rohrenden,Figur 3 Figur 7- eine perspektivische Darstellung einer Ausführungsvariante eines Wärmetauscherblocks eines erfindungsgemäßen Wärmetauschers,
Figur 8- eine perspektivische Darstellung des Wärmetauschers aus Figur im zusammengesetzten Zustand,
Figur 9- eine perspektivische Ansicht eines Wärmeblocks eines Wärmetauschers mit gewalzten Lamellen und
Figur 10- eine Querschnittsdarstellung von AusfĂĽhrungsvarianten zweier verschieden geformter Lamellen.
- FIG. 1
- a perspective view of an embodiment of a heat exchanger according to the invention,
- FIG. 2
- a perspective view of a portion of a slat layer according to the invention,
- FIG. 3
- two side sectional views for comparing a conventional heat exchanger to an embodiment of a heat exchanger according to the invention,
- FIG. 4
- a perspective view of a heat block of a heat exchanger with conically flared pipe ends,
- FIG. 5
- a perspective view of the pipe ends and fin layers before mounting the pipe ends to the support frame,
- FIG. 6
- a detail view of the frame with the in
FIG. 3 shown embodiment of the heat exchanger according to the invention glued tube ends, - FIG. 7
- a perspective view of a variant of a heat exchanger block of a heat exchanger according to the invention,
- FIG. 8
- a perspective view of the heat exchanger of Figure in the assembled state,
- FIG. 9
- a perspective view of a heat block of a heat exchanger with rolled blades and
- FIG. 10
- a cross-sectional view of embodiments of two differently shaped slats.
In der nachfolgenden Figurenbeschreibung beziehen sich Begriffe wie oben, unten, links, rechts, vorne, hinten usw. ausschließlich auf die in den jeweiligen Figuren gewählte beispielhafte Darstellung und Position des Wärmetauschers und anderer Teile. Diese Begriffe sind nicht einschränkend zu verstehen, das heißt, durch verschiedene Arbeitsstellungen oder die spiegelsymmetrische Auslegung oder dergleichen können sich diese Bezüge ändern.In the following description of the figures, terms such as top, bottom, left, right, front, back, etc. refer exclusively to the exemplary representation and position of the heat exchanger and other parts selected in the respective figures. These terms are not intended to be limiting, that is to say, by different working positions or the mirror-symmetrical design or the like, these references may change.
Unter Kühlluftfläche versteht man dabei die direkt mit der strömenden Kühlluft in Kontakt stehende, wärmetauschende Fläche, bestehend aus der Summe der Rohraußenflächen, die nicht von Klebstoff oder Lamellennocken abgedeckt sind sowie den sich mehr oder weniger parallel zur Außenfläche der Rohre 2 erstreckenden Flächen der Lamellennocken und insbesondere den Oberflächen der von den Rohrflächen abstehenden Lamellenflanken. Die im An- bzw. Abströmbereich der Kühlluft liegenden Außenflächen der Rohrschmalseiten gehören ebenfalls zur Kühlluftfläche. Nicht zur Kühlluftfläche gehören die Anteile der Rohraußen- bzw. Lamellenoberflächen, die mit Klebstoff bedeckt sind bzw. direkt an- oder aufeinander liegen, so dass sie nicht von Kühlluft angeströmt werden können. Nicht zur Kühlluftfläche gehören auch angeströmte Flächen der Seitenteile 28 sowie durch diese direkt abgedeckte, äußere Lamellenoberflächen. Die Prozeßluftfläche ist die Summe aller von der Prozessluft beaufschlagten Innenflächen der Rohre 2, deren Außenseite von Kühlluft angeströmt bzw. mit Lamellen versehen ist. Nicht zur Prozessluftfläche gehören die in den Rahmen 4 befestigten Rohrenden 26.Cooling air surface is understood to be the heat-exchanging surface which is in direct contact with the flowing cooling air and consists of the sum of the tube outer surfaces which are not covered by adhesive or lamella cams and the surfaces of the lamellar cams which extend more or less parallel to the outer surface of the
Die Rohre 2 sind zu den Lamellenschichten 3 vorzugsweise nach Art eines Kreuzstrom-Wärmeaustauschers, also senkrecht zueinander, ausgerichtet.The
An den offenen Stirnseiten der Rohre 2 sind jeweilige Rahmen 4, 5 dicht verklebt. Diese Rahmen besitzen jeweilige Dichtungen 6, 7 zur Abdichtung in einem Gehäuse einer Bodengruppe eines Trockners.At the open end faces of the
Die
Der untere Teil von
Die
Bevorzugt ist in jedem der Stege 18 der Halterahmen 4, 5 jeweils ein parallel zu den Außenwänden des Steges 18 verlaufender Innensteg 20 angeformt, wobei die mit dem Klebemittel 12 angefüllten Rinnen 17 durch eine Wand des Innensteges und der konisch geformten Wandung 19 begrenzt sind. Dadurch kann das Klebemittel 12 in minimaler notwendiger Menge dosiert werden. Bevorzugt sind in den konisch geformten Wandungen 19 der Stege 18 taschenförmige Ausbuchtungen 21 ausgebildet, die für eine gleichmäßige Verteilung des Klebemittels 12 zwischen dem Steg 19 und der Rohrinnenfläche 22 nach dem Aufschieben des Rohrendes 16 sorgen, um so für eine bestmögliche Festigkeit und Dichtheit dieser Verklebung zu sorgen.Preferably, in each of the
In
In
Die
Während die in den
Zwei besonders vorteilhafte Varianten einer Lamellenschicht 25a, 25b sind in
Von besonderem Vorteil ist bei dieser Bemessung der Nocken auch, dass die Lamellen25a, 25b bei der Anordnung der Elemente 23 übereinander nicht ineinander rutschen und verhaken können, was die Montage des Wärmetauschers erleichtert.Of particular advantage in this dimensioning of the cam also that the
GegenĂĽber der in den
- 11
- Wärmetauscherheat exchangers
- 22
- Rohr(e)Tube)
- 33
- Lamellenschicht(en)Lamellar layer (s)
- 44
- Rahmenframe
- 55
- Rahmenframe
- 66
- Dichtungenseals
- 77
- Dichtungenseals
- 88th
- BlechseitenteilSheet metal side panel
- 99
- Schnitteslice
- 1010
- Wärmetauscherblockheat exchanger block
- 1111
- Rohrendenpipe ends
- 1212
- Klebemitteladhesive
- 1313
- Freiraumfree space
- 1414
- Längsseite des RohresLong side of the pipe
- 1515
- Außenflächen der LamellenExternal surfaces of the slats
- 1616
- stirnseitige Enden/Rohrendefront ends / pipe end
- 1717
- Rinnenrun
- 1818
- StegeStege
- 1919
- Wandungenwalls
- 2020
- Innensteginner web
- 2121
- Ausbuchtung(en)Bulge (s)
- 2222
- RohrinnenflächePipe inside
- 2323
- Elementeelements
- 2424
- Rohrpipe
- 2525
- Lamellenschichtenlamellar layers
- 25a25a
- Lamellenschichtenlamellar layers
- 25b25b
- Lamellenschichtenlamellar layers
- 2626
- Ende(n)End up)
- 2727
- Wärmetauscherheat exchangers
- 2828
- Kunststoff-SeitenteilPlastic side panel
- 2929
- Lamellennockenlamellae cams
- 3030
- Rohrblechtube sheet
- 3131
- Klebstoffadhesive
- HH
- Höheheight
- NTNT
- Nockenteilungcam division
- KLKL
- KühlluftströmungsrichtungCooling air flow direction
- PLPL
- ProzeßluftströmungsrichtungProcess air flow direction
- rr
- Radius einer NockeRadius of a cam
- nn
- Breite einer NockeWidth of a cam
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL11159327T PL2369284T3 (en) | 2010-03-23 | 2011-03-23 | Heat exchanger, in particular for a condensation laundry dryer |
Applications Claiming Priority (1)
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DE202010000441 | 2010-03-23 |
Publications (3)
Publication Number | Publication Date |
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EP2369284A2 true EP2369284A2 (en) | 2011-09-28 |
EP2369284A3 EP2369284A3 (en) | 2014-01-22 |
EP2369284B1 EP2369284B1 (en) | 2018-01-24 |
Family
ID=44260060
Family Applications (1)
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EP11159327.3A Active EP2369284B1 (en) | 2010-03-23 | 2011-03-23 | Heat exchanger, in particular for a condensation laundry dryer |
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EP (1) | EP2369284B1 (en) |
DE (1) | DE202011000660U1 (en) |
PL (1) | PL2369284T3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017059959A1 (en) * | 2015-10-08 | 2017-04-13 | Linde Aktiengesellschaft | Fin for a plate heat exchanger and method for producing same |
US11592238B2 (en) | 2017-11-23 | 2023-02-28 | Watergen Ltd. | Plate heat exchanger with overlapping fins and tubes heat exchanger |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0305702A1 (en) | 1987-08-25 | 1989-03-08 | Behr GmbH & Co. | Heat exchanger with a finned tube arrangement |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE68926202T3 (en) * | 1988-09-14 | 2002-05-16 | Showa Denko Kk | capacitor |
JPH06241678A (en) * | 1993-02-19 | 1994-09-02 | Hitachi Ltd | Parallel flow heat exchanger for heat pump |
DE19838525C2 (en) * | 1997-09-03 | 2002-12-05 | Joma Polytec Kunststofftechnik | Cross-flow heat exchangers for condensation dryers and manufacturing processes |
DE102005013051A1 (en) * | 2005-03-18 | 2006-09-21 | BSH Bosch und Siemens Hausgeräte GmbH | Condensation Dryer |
JP2007178015A (en) * | 2005-12-27 | 2007-07-12 | Showa Denko Kk | Heat exchanger |
-
2011
- 2011-03-23 EP EP11159327.3A patent/EP2369284B1/en active Active
- 2011-03-23 DE DE202011000660U patent/DE202011000660U1/en not_active Expired - Lifetime
- 2011-03-23 PL PL11159327T patent/PL2369284T3/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0305702A1 (en) | 1987-08-25 | 1989-03-08 | Behr GmbH & Co. | Heat exchanger with a finned tube arrangement |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017059959A1 (en) * | 2015-10-08 | 2017-04-13 | Linde Aktiengesellschaft | Fin for a plate heat exchanger and method for producing same |
EP3531055A1 (en) * | 2015-10-08 | 2019-08-28 | Linde Aktiengesellschaft | Plate-type heat exchanger and method of manufacturing same |
US10578376B2 (en) | 2015-10-08 | 2020-03-03 | Linde Aktiengesellschaft | Fin for a plate heat exchanger and method for producing same |
US11592238B2 (en) | 2017-11-23 | 2023-02-28 | Watergen Ltd. | Plate heat exchanger with overlapping fins and tubes heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
EP2369284A3 (en) | 2014-01-22 |
EP2369284B1 (en) | 2018-01-24 |
DE202011000660U1 (en) | 2012-01-13 |
PL2369284T3 (en) | 2018-06-29 |
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