EP1050618B1 - Wärmetauscher für Haushaltwäschetrockner - Google Patents
Wärmetauscher für Haushaltwäschetrockner Download PDFInfo
- Publication number
- EP1050618B1 EP1050618B1 EP00107336A EP00107336A EP1050618B1 EP 1050618 B1 EP1050618 B1 EP 1050618B1 EP 00107336 A EP00107336 A EP 00107336A EP 00107336 A EP00107336 A EP 00107336A EP 1050618 B1 EP1050618 B1 EP 1050618B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- gas flow
- heat exchange
- gas
- flow
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
-
- 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 dryers
-
- 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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements
-
- 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 dryers
- D06F58/24—Condensing arrangements
Definitions
- the invention relates to a heat exchanger with a plurality of heat exchanger plates arranged one above the other for a gas stream in a household clothes dryer where the gas stream immediately in front of and / or behind the heat exchanger plates at an angle to their level runs.
- Tumble dryers or washer-dryers which operate on the condensation principle work in which the laundry to be dried is in contact with one particular heated process gas stream or process air stream is brought to the Absorbs moisture from the laundry. This process gas stream is then in one Cooled heat exchanger, whereby the moisture contained in the process gas condenses and can be dissipated. The dried process gas is then usually again warmed and again led to the laundry to be dried.
- the process gas stream in the tumble dryer is usually not exclusively straight, but because of the structural conditions in the device it is also angled or curved. This is particularly disadvantageous when or shortly before entering the heat exchanger. Due to the curved process gas flow occur in particular, but also behind Heat exchanger plates on adverse flow losses, including energy consumption increase. In addition, it can happen that the gas flow after a Curvature is distributed unevenly in its guidance over the cross section. The heat exchanger plates of the heat exchanger can be caused by an uneven distribution of the Gas flow are applied unevenly, which results in the achieved heat exchange performance is reduced.
- a clothes dryer in which in a curved Gas channel are arranged in front of the heat exchanger flow guide, which is the gas channel divide into individual flow spaces in the direction of flow and thus the gas flow at Output of the gas channel or at the input of the heat exchanger via the Equalize cross-section.
- the heat exchanger should be better used in this way become.
- the required flow guide and their attachment in front of the heat exchanger however, represent an additional expense, which disadvantageously affects the manufacturing costs elevated.
- the invention has for its object a heat exchanger of the aforementioned To create a way in which the flow loss of the gas stream is reduced and the heat exchange performance is increased and can be manufactured easily and inexpensively.
- this object is achieved in that ends around which the gas stream flows the heat exchanger plates are staggered.
- Both Gas flow ends of the heat exchanger plates at the inlet and at the outlet of the heat exchanger may be arranged offset in steps, but with a step-like offset at the inlet of the heat exchanger a much greater reduction the flow resistances and better control of the distribution of the gas flow leaves. Nevertheless, a step-like offset can also occur at the outlet of the heat exchanger contribute to a reduction in flow resistance.
- Heat exchangers may not all be staggered, it can for example, only the top or bottom may be offset.
- the heat exchange can, for example, by conduction through the heat exchanger plates, which in this case is preferably solid and made of a good heat-conducting material are, by spraying the heat exchanger plates with a liquid or in particular can be achieved by using hollow heat exchanger plates by a Heat exchange medium are flowed through. Suitable as a heat exchange medium especially the ambient air of the dryer.
- the offset is advantageously set so that individual partial flows in the spaces between the heat exchanger plates at the end of the heat exchanger be cooled to the same temperature.
- the gas flow upstream of the heat exchanger can its cross-section with respect to both the flow rate and the flow direction be different.
- the optimally set offset between the heat exchanger plates can therefore increase, decrease or change over their stack and can be experimental or by numerical simulation, especially after a Finite element method can be determined.
- a surface of the heat exchanger plate can be used by the gas flow be taken into account, which can be taken into account that by setting an offset in turn can change the length of the plate and thus its area.
- the distance between the individual plates can also be offset between the plates to be changed.
- the offset of ends of the heat exchanger plates around which the gas flow flows can be selected in this way be that the gas flow substantially perpendicular and effective for this Flow cross-section enlarged at the inlet to and / or at the outlet from the heat exchanger becomes.
- the heat exchanger plates can be caused by fluff or other contaminants be occupied, whereby the heat transfer to the gas flowing past and thus the Heat exchange performance is deteriorated.
- the heat exchanger plates are therefore often like this mounted that they can be removed especially for cleaning.
- the heat exchanger plates can be different, so that the Heat exchanger plates are not mixed up and only reinstalled at a certain point may be.
- the heat exchanger advantageously has safety devices that a reinsertion of each heat exchanger plate on only one allow this allowed position.
- These security devices can, for example Protrusions or other design measures may be used for each heat exchanger plate are different and with counterparts in the heat exchanger or the place where the Heat exchanger plates are installed, interact.
- the heat exchanger plates have gas flow around them Ends gas deflection parts, which essentially correspond to the desired gas flow follow, with only a few ends around which the gas stream flows have gas deflection parts can. In this way, the flow losses can be further reduced because the gas flow strikes the heat exchanger plates at an angle or flows away from them at an angle and must be redirected in any case.
- these gas deflection parts also the distribution of the gas flow to the individual heat exchanger plates or their gaps are influenced.
- These gas deflection parts can also be shaped differently for each plate to take into account their arrangement and also to determine the proportion of the gas flow with which the plate in question flows against shall be.
- the ends of the heat exchanger plates similar gas deflection parts can be arranged.
- the heat exchanger plates advantageously form channels, each of two plates and delimited by a gas deflection part at at least one end around which the gas flow flows and that of a liquid or gaseous heat exchange medium can be flowed through.
- a gas deflection part at at least one end around which the gas flow flows and that of a liquid or gaseous heat exchange medium can be flowed through.
- At least two gas deflection parts can be combined into one part and individually adapted to the flow requirements for the respectively assigned heat exchanger plate his.
- Each of the gas deflection parts can be located at the same end of the heat exchanger plates are arranged to be combined into one part, or the Gas deflection parts at the front and rear ends of the heat exchanger plates be combined into one part.
- the production in particular from plastic can be greatly simplify in this way.
- the Heat exchanger plates are held by the gas deflection parts, so that on this Way the heat exchanger plates can be easily combined into a stack, which is easier to handle.
- the gas deflection parts can, for example the front and / or the rear ends of the heat exchanger plates with each other to be connected by striving.
- the struts can only on the side ends of the gas deflection parts and / or distributed over their length, so that the gas deflecting parts together with the struts form a kind of grille, which at the front and / or rear ends of the heat exchanger plates can be placed. Still is it is possible to provide such a grid at the inlet and at the outlet of the heat exchanger and connect laterally with the help of side panels, so that a Frame is formed in which the heat exchange plates can be held.
- a household clothes dryer equipped with a heat exchanger according to the invention can also be set up such that the gas flow flows around the heat exchanger plates Ends pivotable gas deflection parts are articulated and that he is a heating device for heating the gas stream and has a controller that is set up in this way is that they sense the temperature of the gas stream and depending on the sensed temperature with the help of the gas deflection parts the flow resistance of the heat exchanger can change for the gas flow. In this way, even with constant power Heating device affects the temperature of the gas flow and within certain limits be managed.
- the gas flow by increasing the Flow resistance of the heat exchanger are throttled very much, so that the Gas flow flowing through the heat exchanger and cooled there is low and the temperature of the gas flow increases faster.
- the gas deflection parts can be aligned so that the flow losses are as low as possible, whereby they are pivoted again when the gas flow temperature drops to throttle the gas flow and raise the temperature.
- the heater the household dryer can also be designed so that at maximum continuously Heating power of the gas stream its target temperature with a slight throttling reached by the gas deflection parts. This way both can be exceeded as well as falling below the target temperature of the gas flow by adjusting the Gas deflection parts can be counteracted.
- FIGS. 1 and 2 there is a heat exchanger 1 for a gas stream S in a clothes dryer shown.
- the heat exchanger 1 is essentially made of heat exchanger plates 2 formed, between which the gas flow S flows and on the surface the heat exchange to the gas takes place.
- the ends of the Heat exchanger plates 2 limit inlet openings.
- walls are shown which form a channel 5 for the gas stream S.
- the channel 5 runs in front of the inlet of the heat exchanger 1 essentially in a right one Angle so that the gas flow S obliquely with respect to the levels of the heat exchanger plates 2 meets the inlet of the heat exchanger 1.
- the gas flow S in channel 5 is distributed unevenly on the one hand and, on the other hand, undergoes a throttling that reduces the energy consumption of the tumble dryer elevated.
- the heat exchanger plates 2 are attached to their side edges on side parts 6, the combine the heat exchanger plates 2 into a stack that is in one piece can be removed for cleaning, for example.
- each of the ends of the heat exchanger plates 2 shown on the left are arranged in a step-like manner the lower heat exchanger plates 2 protrude further into the channel 5.
- these have the same length, so that their rear ends also have an offset.
- the Gas stream S therefore strikes inlet openings of the valve over its entire width Heat exchanger 1, so that the gas flow S its direction of flow before flowing into only needs to change the heat exchanger 1 to a lesser extent. The flow losses and the Energy consumption is reduced in this way.
- the heat exchange performance is the same in the present embodiment.
- the offset is set so that the gas flow S on the heat exchanger plates 2 distributed according to their heat exchange performance.
- For heat exchange with the gas flow S can in this embodiment all of the aforementioned methods be used.
- FIG. 2 shows a second embodiment in which the gas stream S flows against it
- the individual gas deflection parts 4 equalizes the distribution of the gas flow S on the individual heat exchanger plates 2 are so that the heat exchange performance of the heat exchanger 1 is optimally used becomes.
- the heat exchanger plates 2 are designed as channels and are flowed through by air as a heat exchange medium, which the clothes dryer of its surroundings.
- the heat exchanger plates 2 each have two plates 3 on, which are made of a good heat-conducting material and in particular metal.
- the plates 3 are at the front ends of gas deflecting parts, against which gas flow S flows 4 and sealing at the rear ends, not shown in the figures, via spacers connected to each other and thus form closed channels through which the heat exchange medium or the cooling air flows perpendicular to the plane of the drawing can.
- the gas deflection parts 4 and the spacers at the rear ends are mutually connected by struts 7 and in this way form a grid which, for example, as one-piece molded part can be made of plastic. These grids are designed that it continues to be attached to side parts 6, for example by means of the struts 7 can be. In this way, the heat exchanger plates 2 and Plates 3 can be easily combined into a stack by the front and the rear ends of a grid with gas deflection parts 4 or with spacers is placed and these grids are laterally connected to side parts 6, so that in this way a frame is formed in which the heat exchange plates 2 and the plates 3 are held.
- Heat exchanger plates 2 can thus reduce the flow losses of the gas stream S and better utilization of the heat exchanger 1 can be achieved, wherein through the use of gas deflection parts 4, in particular when used simultaneously as a spacer for the plates 3, a further reduction in flow losses can be achieved with little effort.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
- Fig. 1
- eine schematische Schnittansicht eines erfindungsgemäßen Wärmetauschers gemäß einer ersten Ausführungsform und
- Fig. 2
- eine Ansicht des Einlaßbereichs einer zweiten Ausführungsform des erfindungsgemäßen Wärmetauschers.
Claims (8)
- Wärmetauscher (1 ) mit mehreren übereinander angeordneten Wärmetauscherplatten (2) für einen Gasstrom (S) in einem Haushaltwäschetrockner, bei dem der Gasstrom (S) unmittelbar vor und/oder hinter den Wärmetauscherplatten (2) schräg zu deren Ebene verläuft, dadurch gekennzeichnet, daß vom Gasstrom (S) umströmte Enden der Wärmetauscherplatten (2) treppenförmig versetzt angeordnet sind.
- Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, daß der Versatz zwischen vom Gasstrom (S) umströmten Enden der einzelnen Wärmetauscherplatten (2) so gewählt ist, daß der Gasstrom (S) die Wärmetauscherplatten (2) entsprechend ihrer Wärmetauschleistung beaufschlagt.
- Wärmetauscher nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß durch den Versatz von vom Gasstrom (S) umströmten Enden der Wärmetauscherplatten (2) der zum Gasstrom (S) im wesentlichen senkrechte und für diesen wirksame Strömungsquerschnitt am Eintritt zum und/oder am Austritt aus dem Wärmetauscher (1) vergrößert wird.
- Wärmetauscher nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Wärmetauscherplatten (2) herausgenommen werden können und daß der Wärmetauscher (1) Sicherungseinrichtungen aufweist, die ein Wiedereinsetzen jeder Wärmetauscherplatte (2) nur an einer für diese zulässigen Position zulassen
- Wärmetauscher nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Wärmetauscherplatten (2) an vom Gasstrom (S) umströmten Enden Gasumlenkungsteile (4) aufweisen, die dem gewünschten Gasstromverlauf im wesentlichen folgen.
- Wärmetauscher nach Anspruch 5, dadurch gekennzeichnet, daß die Wärmetauscherplatten (2) Kanäle für ein flüssiges oder gasförmiges Wärmeaustauschmedium bilden, die jeweils von zwei Platten (3) an wenigstens einem vom Gasstrom (S) umströmten Ende von einem Gasumlenkungsteil (4) begrenzt werden.
- Wärmetauscher nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß wenigstens zwei Gasumlenkungsteile (4) zu einem Teil zusammengefaßt sind und individuell für die jeweils zugeordnete Wärmetauscherplatte (2) an die Strömungserfordemisse angepaßt sind.
- Haushaltswäschetrockner mit einem Wärmetauscher nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß an den Wärmetauscherplatten (2) an vom Gasstrom (S) umströmten Enden schwenkbare Gasumlenkungsteile (4) angelenkt sind und daß er eine Heizeinrichtung zum Erwärmen des Gasstroms (S) und eine Steuerung aufweist, die derart eingerichtet ist, daß sie die Temperatur des Gasstroms erfassen und in Abhängigkeit der erfassten Temperatur mit Hilfe der Gasumlenkungsteile (4) den Strömungswiderstand des Wärmetauschers (1) für den Gasstrom (S) verändern kann.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19915882 | 1999-04-08 | ||
DE19915882 | 1999-04-08 | ||
DE19943389 | 1999-09-10 | ||
DE19943389A DE19943389A1 (de) | 1999-04-08 | 1999-09-10 | Wärmetauscher für Haushaltwäschetrockner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1050618A1 EP1050618A1 (de) | 2000-11-08 |
EP1050618B1 true EP1050618B1 (de) | 2003-10-15 |
Family
ID=26052812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00107336A Expired - Lifetime EP1050618B1 (de) | 1999-04-08 | 2000-04-04 | Wärmetauscher für Haushaltwäschetrockner |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1050618B1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006005809B4 (de) * | 2006-02-08 | 2012-05-24 | BSH Bosch und Siemens Hausgeräte GmbH | Kondensationstrockner enthaltend ein Kondensatorgehäuse mit mindestens einer dünnen Wand |
EP2565321A1 (de) | 2011-09-01 | 2013-03-06 | BSH Bosch und Siemens Hausgeräte GmbH | Trockner mit einem Kreuzstromwärmetauscher und verfahren zu seinem betrieb |
EP3789717B1 (de) * | 2019-09-06 | 2024-08-21 | Hamilton Sundstrand Corporation | Wärmetauscherschaufel mit luftstromteilhöhenmodifikator |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0023427D0 (en) * | 2000-09-23 | 2000-11-08 | Smiths Industries Plc | Apparatus |
DE102006021828A1 (de) * | 2006-05-10 | 2007-11-15 | BSH Bosch und Siemens Hausgeräte GmbH | Kondensationstrockner mit einer Prozessluftspirale, und Verfahren zum Trocknen in einem solchen Kondensationstrockner |
GB201009701D0 (en) | 2010-06-10 | 2010-07-21 | Rolls Royce Plc | A heat exchanger |
EP2980306B1 (de) * | 2014-07-31 | 2018-01-17 | Whirlpool EMEA S.p.A | Haushaltstrockengerät mit verbessertem einlassbereich für das trockenmedium in einem kondensator |
US11686530B2 (en) * | 2018-03-16 | 2023-06-27 | Hamilton Sundstrand Corporation | Plate fin heat exchanger flexible manifold |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1686614A (en) * | 1926-12-30 | 1928-10-09 | Hume James Howden | Air heater |
DE2541424A1 (de) * | 1975-09-17 | 1977-03-31 | Helmut Weinbrenner Maschinen U | Stehender, dampf- oder wasserbeheizter waermeaustauscher |
JPS57184894A (en) * | 1981-05-08 | 1982-11-13 | Hitachi Ltd | Heat exchanger |
DE19644711A1 (de) * | 1996-10-28 | 1998-04-30 | Aeg Hausgeraete Gmbh | Trockner mit einem besonderen Prozeßluftkanal |
HU9700416D0 (en) * | 1997-02-11 | 1997-03-28 | Energiagazdalkodasi Intezet | Actuator without external energy source for actuating guide plates of air-side of air-cooled heat-exchange apparatus |
DE19743427B4 (de) * | 1997-10-01 | 2007-05-03 | Behr Gmbh & Co. Kg | Wärmeübertrager |
-
2000
- 2000-04-04 EP EP00107336A patent/EP1050618B1/de not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006005809B4 (de) * | 2006-02-08 | 2012-05-24 | BSH Bosch und Siemens Hausgeräte GmbH | Kondensationstrockner enthaltend ein Kondensatorgehäuse mit mindestens einer dünnen Wand |
EP2565321A1 (de) | 2011-09-01 | 2013-03-06 | BSH Bosch und Siemens Hausgeräte GmbH | Trockner mit einem Kreuzstromwärmetauscher und verfahren zu seinem betrieb |
DE102011081940A1 (de) * | 2011-09-01 | 2013-03-07 | BSH Bosch und Siemens Hausgeräte GmbH | Trockner mit einem Kreuzstromwärmetauscher und Verfahren zu seinem Betrieb |
EP3789717B1 (de) * | 2019-09-06 | 2024-08-21 | Hamilton Sundstrand Corporation | Wärmetauscherschaufel mit luftstromteilhöhenmodifikator |
Also Published As
Publication number | Publication date |
---|---|
EP1050618A1 (de) | 2000-11-08 |
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