EP2580386A1 - Séchoir à condensation à nettoyage d'échangeur de chaleur intégré et procédé pour le faire fonctionner - Google Patents

Séchoir à condensation à nettoyage d'échangeur de chaleur intégré et procédé pour le faire fonctionner

Info

Publication number
EP2580386A1
EP2580386A1 EP11722051.7A EP11722051A EP2580386A1 EP 2580386 A1 EP2580386 A1 EP 2580386A1 EP 11722051 A EP11722051 A EP 11722051A EP 2580386 A1 EP2580386 A1 EP 2580386A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
channel
cleaning device
cleaning
condensation dryer
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.)
Withdrawn
Application number
EP11722051.7A
Other languages
German (de)
English (en)
Inventor
René BEDEWITZ
Martin Korte
Uwe-Jens Krausch
Andreas Stolze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2580386A1 publication Critical patent/EP2580386A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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 
    • D06F58/22—Lint collecting arrangements
    • 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
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/45—Cleaning or disinfection of machine parts, e.g. of heat exchangers or filters
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/34—Filtering, e.g. control of lint removal devices

Definitions

  • the invention relates to a condensation dryer with integrated heat exchanger cleaning and a preferred method for its operation.
  • a condensation dryer the operation of which is based on the condensation of the evaporated by means of warm process air moisture from the laundry, does not require exhaust hose and is very popular because it can be used in an internal bathroom or a laundry room of a larger residential complex.
  • air so-called process air
  • process air air
  • a heat exchanger which is usually preceded by a lint filter .
  • the condensed water (condensate) is then usually collected in a suitable container, and the cooled and dried air is returned to the heater and then to the drum.
  • the heat exchangers are removable, in particular air-to-air heat exchanger, so that they can be removed from the condensation dryer for cleaning and after removal of adhering lint, for example by rinsing with a rinsing fluid such as water, can be re-used in the dryer.
  • a heat sink of a heat pump is used as the heat exchanger.
  • the components of a heat pump are usually firmly connected to each other and not reversible removed from the condensation dryer. This applies, for example, to the components of a compressor heat pump, since these are combined in a completely closed and not readily separable circuit for a refrigerant.
  • thermoelectric heat pump which forms a compact and hardly separable unit
  • Peltier elements in which the Peltier effect, which causes the pumping of heat.
  • other heat pumps such as adsorption heat pumps and heat pumps, which use a regenerative gas cycle.
  • DE 199 43 125 A1 describes a method for cleaning a section of a guide of a process air flow in a household laundry dryer, in which outside of a drying phase, in which produced by means of a blower, the process air flow and is brought into a drying room in contact with the laundry to be dried, in a cleaning phase with the fan off, a portion of the process air duct is at least partially flooded for a certain period of time with a liquid which is removed from the flooded portion of the process air duct at the end of the cleaning phase.
  • condensate from a heat exchanger located behind the drying space in the process air flow direction is used to condense the moisture in the process air.
  • DE 37 38 031 C2 describes a method and an apparatus for removing lint from a trained as a heat exchanger condensate separator. At least one process air channel is hermetically sealed against the coolant and arranged for discharging the condensate, which is collected in a disposed below the heat exchanger collecting container until emptying. In the method, at least a part of the collected condensate is flushed during a time-limited program section at least one inner surface of the process air duct.
  • the heat exchanger is provided with a flushing device which has at least one nozzle directed onto at least one inner surface of the process air duct.
  • WO 2008/077708 A1 describes a domestic appliance and a method for removing lint from a heat exchanger of this domestic appliance.
  • condensate generated in the domestic appliance is deflected as a rinsing liquid during a cleaning phase depending on the strength of an air flow and flows depending on the deflection through different areas of the heat exchanger.
  • an efficient cleaning of the heat exchanger can only be achieved with a sufficiently large volume and / or with sufficiently fast flowing rinsing liquid. How to achieve this is left open.
  • WO 2008/1 1961 1 A1 describes a method and a device for cleaning a arranged within a process air cycle of a washer or dryer component, in particular an evaporator of a condenser device, by means of condensate, which obtained in the process air cycle from the wet laundry and in a condensate tray is collected, from which it is passed to a provided above the evaporator washing container. From the outlet side of the condensate is discharged by sudden opening of the respective washing container to said component.
  • DE 42 12 965 A1 describes a condensation dryer with a drum and a lying in the course of a process air flow condensation water tank having a temperature-controlled cooling circuit with pump and a water inlet and a water outlet.
  • the water tank contains at least one condensation filter element, which is arranged above the water level in the course of the process air and in the area of action of spray nozzles of the cooling air circuit.
  • the cooling water in the water tank is pumped continuously through the pump and a three-way valve during the drying process, with spray nozzles providing a uniform film of water on the condensation filter elements while flushing lint.
  • DE 10 2006 018 469 A1 describes a dryer for laundry, in which the dehumidification of the air conveyed in recirculation mode takes place by condensation on a cooler which is part of a heat pump, wherein the dryer is a device for flooding, spraying, flowing through and / or overflowing of the evaporator and / or compressor, wherein a filter filters the water used for flooding, spraying, flowing through and / or overflow.
  • DE 10 2008 040 846 A1 describes a condensation dryer with a drying chamber for objects to be dried, a process air duct in which a heater for heating the process air, a heat exchanger for cooling the process air after passing through the drying chamber and a blower for the transport of the process air a controller and first means for detecting a need for cleaning.
  • the condensation dryer may comprise second means for cleaning the heat exchanger with a rinsing liquid, which preferably comprise a reservoir for the rinsing liquid, in particular a storage container for condensate, a lower container opening and a cleaning line between the heat exchanger and the reservoir.
  • DE 10 2007 049 061 A1 describes a method for cleaning a component arranged within a process air cycle of a laundry or tumble dryer, in particular an evaporator of a condenser device, by means of condensate water obtained from the drying of wet laundry, collected in a pan, from there to directed to a collecting vessel provided above the evaporator and discharged from the outlet side of the relevant evaporator.
  • the condensate water is released by abruptly opening a rinsing chamber as a flood of water to the component.
  • a device in which a rinsing nozzle and / or a downpipe during the delivery of the water surge by a mechanically, hydraulically, pneumatically or electromechanically operated deflection from a beginning of the process air entering the evaporator of the capacitor device initial region to an end region is distractible.
  • WO 2009/031812 A2 describes a dehumidifying apparatus for a dryer with a housing, a drum arranged therein for receiving objects to be dried and a unit for providing hot air for drying, the dehumidifying apparatus; a heat exchanger for exchanging heat with the air from the drum; and an injector disposed between the hot air supplying unit and the heat exchanger for, for example, injecting water.
  • an injection nozzle By means of the injection nozzle, a surface of the dehumidifying apparatus can be cleaned, for example, by lint.
  • an injection nozzle can be rotated within a predetermined angle by means of a drive motor, and in the embodiment shown in Fig. 9, the injector configured for injection can be moved within a certain range.
  • the object of the present invention was to provide a condensation dryer in which a component arranged in the process air duct, in particular a heat exchanger, can be cleaned efficiently in an improved manner.
  • the solution of this object is achieved according to this invention by a dryer with the features of the corresponding independent claim and the method of the corresponding independent claim.
  • Preferred embodiments of the dryer according to the invention are in corresponding dependent claims listed.
  • Preferred embodiments of the dryer according to the invention correspond to preferred embodiments of the method according to the invention and vice versa, although this is not explicitly stated herein.
  • the invention thus relates to a condensation dryer with a drying chamber for objects to be dried, a process air duct in which there is a heater for heating the process air, a heat exchanger for cooling the process air after passing through the drying chamber and a blower for the transport of the process air operating with an aqueous liquid cleaning device, which generates at least one liquid jet, and a control device, wherein the cleaning device during its operation, the direction and / or intensity of the at least one liquid jet changes and wherein the cleaning means a fixed relative to the heat exchanger arrangement with at least one nozzle for Producing the at least one liquid jet and at least one movable body which allows the change of direction and / or intensity of the at least one liquid jet.
  • the cleaning device comprises a liquid-carrying channel with a channel exit in which there is an electrically or hydraulically movable body, which changes its position during operation of the cleaning device to a varying part of the cross section of the channel exit for the Flow of the aqueous liquid (hereinafter also abbreviated to "liquid”) .
  • liquid aqueous liquid
  • the particular electrically or hydraulically movable body according to the invention is not limited, as long as it can cause a temporal variation of the cross section of the channel exit for the flow of the aqueous liquid.
  • the movable body may be a plate or a ball, for example.
  • the movable body will usually cover during operation of the cleaning device different areas of the cross section of the channel exit and so the Direct liquid jet of the stationary at least one nozzle in different directions. Due to the reduced for the passage of the liquid cross-section of the channel outlet of the flow of the liquid is carried out at an increased flow rate.
  • the liquid jet therefore generally meets at an increased speed to be cleaned components of the dryer and can thus develop an improved cleaning effect.
  • the cleaning device thus has at least one electrically or hydraulically movable body, which allows the change of direction and / or intensity (flow velocity and / or cross section) of the at least one liquid jet.
  • the movable body is preferably moved hydraulically by means of the aqueous liquid.
  • the movement of the movable body can also be influenced by selecting a material of specific density and thus a certain buoyancy.
  • the cleaning device preferably has at least one channel with a channel exit, to which a nozzle adjoins. Due to the shape of the nozzle, the at least one liquid jet can be directed specifically to be cleaned components of the dryer. It is preferred that the cleaning device subsequently to a channel for guiding the aqueous liquid has a nozzle whose cross-section increases with increasing distance from the channel.
  • the movable body is at rest, the channel at the channel exit from the nozzle separate. Then, when the operation of the cleaning device, the liquid in the channel, the body is due to the action of the liquid depending on the densities of body and liquid and the Flow conditions in the channel moves so that it leaves its position at rest and releases a portion of the cross section of the channel outlet.
  • a bypass input and a bypass outlet are located in the channel, so that a part of the aqueous liquid flowing in a bypass between the bypass input and bypass outlet generates a turbulent flow in the aqueous liquid surrounding the movable body and thus the movable body can move.
  • bypasses can be used.
  • the position of bypass input and bypass output, as well as the angle that the bypass forms with the channel, especially at the bypass output, can be set to provide optimum flow for the movement of the moving body.
  • devices may be provided in the channel and / or bypass which provide flow fluctuations and thus contribute to a turbulent flow around the movable body.
  • the channel directly in front of the channel exit has a bulge which can at least partially accommodate the movable body, so that the released cross-section of the channel outlet varies during the operation of the cleaning device.
  • released cross-section means the portion of the cross-section of the channel exit available for the flow of liquid.
  • Just in front of the channel exit means a proximity close enough that movement of the movable body will cause a variation in the passage of the passage aqueous liquid available cross-section of the channel exit can cause.
  • the cleaning device operates with an aqueous liquid.
  • the cleaning device is preferably connected to a rinsing container, a water supply and / or a condensate tray.
  • water supply is meant herein generally a water supply of home-available tap water, which is usually with a Tap water pressure of at least 3 bar, but sometimes also with a higher pressure, such as 6 bar, is provided.
  • connection with a water supply allows the cleaning with fresh water, which contains no impurities.
  • the connection with a condensate tray allows the use of condensate in the dryer. Since the condensate in the condensate tray generally contains lint, filtration of the condensate and / or admixture of fresh water from a water supply is performed prior to using the condensate in the purifier.
  • the water supply and / or the condensate tray may be connected directly to the cleaning device, possibly with inter-folding of a pump and / or a filter. However, the fresh water from the water supply and / or the condensate can also initially reach a rinsing tank, which in turn is connected to the cleaning device.
  • the rinsing container generally contains an aqueous rinsing liquid provided for the purpose of cleaning a component in the process air channel (hereinafter also abbreviated to "rinsing liquid”.)
  • the rinsing liquid generally comprises condensate and / or tap water from the water supply
  • the rinsing container can also be part of a larger collecting container for aqueous liquid, in which case the part of the collecting container containing the rinsing liquid can also be referred to as a rinsing chamber Both possibilities can be detected
  • the rinsing container can be permanently or detachably installed in the condensation dryer.
  • the rinsing container for the aqueous rinsing liquid optionally used in the dryer according to the invention preferably comprises a lower container opening and a connecting line is arranged between a heat exchanger and the rinsing container.
  • the cleaning device is preferably carried out immediately or shortly after completion of a drying operation of wet laundry to be dried, since at this time adhering to the component or heat exchanger impurities, especially lint, are still wet or dissolved and are relatively easily removed by the dispensed rinse liquid.
  • condensate tray or washing containers are usually filled with condensate, which can be used to clean the component, eg a heat exchanger.
  • the cleaning device can be used for cleaning of various components of the dryer, preferably those components are cleaned, the inner surfaces of which come into contact with process air, in particular with lint laden process air.
  • the components to be cleaned are therefore preferably the process air duct after the drum and arranged in the process air duct heat exchanger.
  • the at least one liquid jet is directed onto the heat exchanger.
  • the heat exchanger is preferably an air-to-air heat exchanger or a heat sink of a heat pump.
  • the cleaning device can be manually put into operation by a user of the dryer or automatically.
  • the condensation dryer preferably has a means for detecting a need for cleaning the heat exchanger.
  • the condensation dryer has means for detecting a cleaning requirement for the heat exchanger, which determine a degree of use U for determining the cleaning requirement for the heat exchanger, this with a predetermined value U
  • im U, notice the need for cleaning.
  • a counter is provided which determines the number n of the drying processes already carried out and compared with a predetermined limit number ni im . This counter can preferably be reset when cleaning the heat exchanger is performed.
  • a clock is present as a means for detecting the cleaning requirement, which determines a total duration t sum of previously performed drying processes and with a predetermined limit duration t
  • the condensation dryer according to the invention comprises in a further preferred embodiment as a means for detecting the cleaning requirement, an evaluation unit which determines a total amount M of previously dried laundry items and with a predetermined limit total amount M
  • the value for the total amount M may be preferably reset when cleaning of the heat exchanger is performed.
  • the condensation dryer can preferably have a sensor for measuring the volume flow as a means for detecting the need for cleaning in the process air duct.
  • the evaluation unit which determines a total volume flow V and this with a limiting volume flow V
  • a temperature gradient .DELTA. ⁇ can be determined via a temperature sensor arranged behind the heater, as viewed in the direction of the process air flow. This temperature gradient is measured with a limit temperature gradient AT
  • the condensation dryer has an acoustic and / or visual display means for displaying the cleaning requirement and / or for displaying the operation of the cleaning device.
  • a cleaning of the heat exchanger is preferably carried out with the cleaning device.
  • the cleaning using the aqueous liquid may be performed automatically or controllably by a user of the condensation dryer. Preferably, this can be set on the condensation dryer, whether automatic or manual cleaning should be performed.
  • the condensation dryer according to the invention can be designed as a pure dryer, but also as a washer-dryer.
  • a washer-dryer is here understood to mean a combination appliance which has a washing function for washing laundry and a drying function for drying wet laundry.
  • a washer-dryer has the advantage that it is already connected as such to a water supply.
  • the invention also relates to a method for operating a condensation dryer with a drying chamber for objects to be dried, a process air duct, in which a heater for heating the process air, a heat exchanger for cooling the process air after passing through the drying chamber and a blower for the transport of the Process air, a cleaning device operating with an aqueous liquid, which generates at least one liquid jet, wherein the cleaning device has a relative to the heat exchanger fixed arrangement with at least one nozzle for generating the at least one liquid jet and at least one movable body, the change of direction and / or intensity of the at least one liquid jet., And a control device, in which method, the cleaning device during its operation, the direction and / or intensity of at least a liquid jet changes and the heat exchanger is acted upon by the at least one liquid jet.
  • the components to be cleaned can be cleaned with a predetermined amount of the aqueous liquid, wherein the amount used can be adjusted depending on the extent of a determined cleaning requirement.
  • the inventive method for operating a condensation dryer preferably uses a condensation dryer with means for detecting a need for cleaning the heat exchanger, said means for determining the cleaning requirement for the heat exchanger preferably determine a degree of use U, this with a predetermined value U
  • im U, notice the need for cleaning.
  • in using a counter usually also a natural number. For the case U U
  • the cleaning requirement for the heat exchanger which is preferably to be cleaned, be indicated acoustically and / or optically. Since this makes it possible for a user of the condensation dryer to recognize the need for cleaning, an acoustic and / or optical display of the cleaning requirement, in addition to automatic cleaning, also allows control of the cleaning by the user.
  • the aqueous liquid preferably comprises condensate.
  • the aqueous liquid it is again preferred for the aqueous liquid to be passed from the rinsing container into the heat exchanger, after it has been used collected in a condensate tray and pumped back into the rinse tank.
  • the controller may perform automatic cleaning even at night time if the user does not use the dryer anyway.
  • the dryer may indicate an imminent cleaning phase and may alert the user that a condensate tank used as a flush tank should not be emptied so that enough condensate is available for cleaning with the cleaner.
  • the rinse tank is filled, for example, by adding tap water from the water supply to a certain amount of water (e.g., 3 liters). The added amount of water will depend on whether the rinse tank is used to store condensate and may already contain condensate. Then, for example, a cleaning program is selected by the user on the condensation dryer. One or more cleaning steps are then initiated via the control device. The start and end of the cleaning steps are preferably displayed audibly and / or visually to the user.
  • the user can manually dispose of the rinsing liquid by removing and emptying, depending on the contamination of the used rinsing liquid in the case of a removable rinsing container.
  • the rinsing liquid can be automatically disposed of via a drain hose from the condensation dryer.
  • the invention has the advantage that in the case of a condensation dryer, cleaning with aqueous liquid having an increased effect is carried out. All areas of a component to be cleaned in the dryer in the process air duct can be cleaned with a sufficiently large amount of water, which moreover can be used at an elevated pressure. Thus, automatically or by influencing a user, the heat exchanger of a condensation dryer can be cleaned efficiently. In embodiments of the invention, moreover, without the need for an opening the condensation dryer a cleaning requirement of a heat exchanger can be determined.
  • the invention is particularly advantageous when using a heat pump, since the heat sink of a heat pump usually can not be removed from the condensation dryer for cleaning.
  • the heat exchanger of the condensation dryer can be easily and conveniently cleaned without mechanical intervention in the device.
  • Figure 1 shows a vertical section through a condensation dryer according to a first embodiment, wherein the condensation dryer is designed as a vented dryer.
  • Figure 2 shows a vertical section through a condensation dryer according to a second embodiment, which is designed as a circulating air dryer.
  • Figure 3 shows a section through a cleaning device which can produce four liquid jets and is used in a third embodiment of a condensation dryer according to the invention.
  • FIG. 4 shows an enlarged section through the cleaning device of Fig. 3, wherein the generation of a liquid jet is shown in detail.
  • filled arrows indicate the flow direction of the process air and open arrows indicate the flow direction of an aqueous liquid.
  • the dryer 1 shown in Figure 1 has a drum rotatable about a horizontal axis as a drying chamber 3, within which drivers 25 are mounted for movement of laundry items not shown here during a drum rotation.
  • Supply air is fed in the process air duct 2 by means of a blower 6 from the supply air inlet 23 via an air-air heat exchanger 5 and an electric heater 4 through the drum 3.
  • air heated by the electric heater 4 is conducted from the side of the drum 3 opposite a door 22 through the perforated bottom thereof into the drum 3.
  • the condensate tray 17 is connected via a condensate channel 18, in which a pump 28 is located, to a rinsing container 19, in which an aqueous liquid 26 is located.
  • the washing container 19 is also connected via a connection 33 and a two-way valve 29 for controlling the water supply to a water supply 27.
  • the aqueous liquid 26 can reach a cleaning device 7 via a lower container opening 21 and a connecting line 20.
  • the cleaning device 7 comprises in the embodiment shown here a channel 9, which is connected via the connecting line 20 with the washing container 19.
  • In the channel are a bypass 16 and a bulge 1 1, in which a movable body 10 is located, which is designed here as a ball.
  • the movable ball 10 separates the channel 9 from a nozzle 13 in the resting state of the cleaning device 7. If aqueous liquid passes through the channel 9 and the bypass 16, a turbulent flow is generated in the aqueous liquid 26 surrounding the movable ball 10, so that the ball 10 in the bulge 1 1 moves back and forth and so exposes different parts of the cross section of a channel exit not shown here in detail. As a result, flow velocity and direction change from one to the other Nozzle 13 passing jet of liquid, although the nozzle 13 itself remains stationary.
  • the nozzle is designed so that its cross section increases with increasing distance from the channel outlet.
  • the jet of liquid from the nozzle 13 is directed at the inner surface of the air-to-air heat exchanger 5 in the embodiment shown here. Due to the varying orientation of the liquid jet, various parts of the inner surface of the air-to-air heat exchanger 5 can be efficiently cleaned of adhering lint.
  • the aqueous liquid 26 used in the cleaning device 7 is removed in this embodiment from a washing container 19 serving as a storage.
  • the rinsing container 19 can be filled with fresh water from the water supply 27 and / or with condensate from the condensate tray 17, from which the condensate can be pumped off via a condensate channel 18 by means of the pump 28 for this purpose.
  • the lower container opening 21 is opened and the aqueous liquid 26 is passed through the connecting line 20 into the cleaning device 7, which directs it as a liquid jet, which changes direction and intensity, for cleaning in the air-air heat exchanger 5, relative to the the nozzle 13 is stationary.
  • the aqueous liquid 26 used in the cleaning device can be collected after cleaning of the heat exchanger 5 as shown here, for example in the condensate pan 17 and pumped for reuse in the washing container 19 or disposed of in a manner not shown here.
  • the water supply 27 shown in FIG. 1 is in particular a water supply system of a building.
  • the dryer of the embodiment shown here enables an automatic or manual starting of the cleaning device 7 and thus of the method according to the invention.
  • a need for cleaning can be determined.
  • the process air duct 2 in this embodiment, behind the heater 4, there is a sensor 34 for volume flow measurement. This is done by an evaluation unit 37, the determination of a total volume flow V of the process air and its comparison with a limiting flow rate V
  • the placement of the sensor 34 designed to measure the volume flow sensor 34 in the process air circuit is largely uncritical, but is preferably behind the heater 4, because there the process air flow is largely free of lint and the like possibly debilitating loads and thus long-term reliable measurement can be expected.
  • a sensor for temperature measurement placed at the designated location is also considered, by means of which the evaluation unit 37 determines a temperature gradient ⁇ of the process air and with a limit temperature gradient AT
  • a counter 33 for the number of drying processes carried out, a clock 34 and a correspondingly programmed evaluation unit 37 are additionally present as a means for determining a cleaning requirement of the air-air heat exchanger 5. These are either part of the control device 8 of the condensation dryer 1 or associated with it.
  • a cleaning process is triggered by the control device 8 or the evaluation unit 37 in the embodiment shown in FIG. 1, in which the air-air heat exchanger 5 is cleaned by means of the cleaning device 7 as described above. This process can be repeated if necessary.
  • the drum 3 is mounted in the embodiment shown in Fig. 1 at the rear bottom by means of a pivot bearing and front by means of a bearing plate, wherein the drum 3 with a brim rests on a sliding strip 31 on the bearing plate 32 and is thus held at the front end.
  • the control of the dryer via a control device 8, which can be controlled by the user via an operating unit 36.
  • the fan 6 and the drum 3 are driven by the motor 30.
  • FIG. 2 shows a vertical section through a condensation dryer 1 according to a second embodiment of the invention, wherein the dryer is designed as a circulating air dryer. In this embodiment, therefore, a Zu povertyzugang and an exhaust duct are missing.
  • the cooling of the warm, laden with moisture process air from the drum 3 takes place in the evaporator 39 of a heat pump, which also includes a condenser 40, a compressor 41 and a throttle valve 42.
  • the dryer 1 shown in FIG. 2 has a drum rotatable about a horizontal axis as a drying chamber 3, within which drivers 25 are mounted for moving laundry during a drum rotation.
  • process air is conducted by means of a blower 6 via an electric heater 4.
  • the heated process air then passes into the drum 3, where moisture is removed from the wet items of laundry, not shown here.
  • the moist, warm process air leaves the drum 3 via a fluff grate 38 and flows in the process air duct 2 to the evaporator 39 of the heat pump.
  • the moist, warm process air is cooled in the evaporator 39 and the thereby evaporated refrigerant of the heat pump via a compressor 41 to the condenser 40 passed.
  • the refrigerant liquefies under heat to the flowing in the process air duct cooled and dehumidified process air.
  • the liquid then present in liquid form is passed via the throttle valve 42 in turn to the evaporator 39, whereby the refrigerant circuit is closed.
  • the resulting condensate in the evaporator 39 is collected in a condensate pan 17 and with the aid of a condensate pump 28 in a condensate channel 18 to a cleaning device 7 pumped.
  • this condensate and / or fresh water can be used from a water supply 27 to the cleaning of the evaporator 39 provided in this embodiment.
  • the cleaning device 7 here comprises a channel 9, which is connected to the condensate pan 17 and the water supply 27.
  • the moving ball 10 separates the channel 9 from a nozzle 13 in the resting state of the cleaning device 7. If aqueous liquid passes through the channel 9 and the bypass 16, a turbulent flow is generated in the aqueous liquid surrounding the movable ball 10, so that the Ball 10 in the bulge 1 1 moves back and forth and so exposed various parts of the cross section of a channel exit not shown here in detail.
  • the ball 10 is thus moved hydraulically through the aqueous liquid.
  • the flow rate, cross section and direction of a liquid jet passing from the stationary nozzle 13 change temporally.
  • the nozzle 13 is in this case designed such that its cross-section increases with increasing distance from the channel exit.
  • the liquid jet from the nozzle 13 is directed in the embodiment shown here on the inner surface of the evaporator 39, relative to which the nozzle 13 is arranged stationary. Due to the varying orientation of the liquid jet, various portions of the interior surface of the evaporator 39 can be efficiently cleaned of adhering fluff.
  • a filter not shown here for the separation of lint from the condensate may be present.
  • fresh water from the water supply 27 can also be used directly for cleaning in the cleaning device 7 of the second embodiment.
  • the aqueous liquid used for the cleaning can be reused or disposed of as mentioned for FIG.
  • control device 8 is designed so that each after one or more drying process, a cleaning with the cleaning device 7 is performed automatically.
  • FIG 3 shows a section through a cleaning device 7, which is used in a third embodiment of a condensation dryer.
  • the cleaning device 7 comprises a liquid distributor 43 which distributes the water from a supply line for fresh water and / or condensate (not shown here) to the four spray heads 44 to 47 shown here.
  • the cleaning device 7 shown here four liquid jets can be generated.
  • the liquid jets can be generated independently or independently of each other.
  • the four spray heads 44 to 47 are in different operating states, recognizable by the differently strong and differently oriented liquid jets.
  • the operating state of spray head 47 (idle state), however, can only be realized if there is no aqueous liquid in the liquid distributor 43 or the liquid distributor 43 is separated from the spray head 47 by a mechanism not shown here.
  • Each of the spray heads 44 to 47 has a channel 9 in which a bypass 16 and a bulge 11 are located between a bypass input 14 and a bypass outlet 15.
  • a movable body 10 designed here as a ball, which in the state of rest (see the operating state of the spray head 47) of the cleaning device 7 separates the channel 9 from a nozzle 13. If aqueous liquid passes through the channel 9 and the bypass 16, then the movable ball 10 is in the surrounding turbulent fluid generates a turbulent flow, so that the ball 10 moves back and forth in the bulge 1 1 and so exposes various parts of the cross section of a channel exit 12. The ball 10 is thus moved hydraulically through the aqueous liquid. As a result, flow rate, cross section and direction of a liquid jet passing out of the nozzle 13 change with time.
  • the nozzle 13 is in this case designed such that its cross-section increases with increasing distance from the channel exit.
  • the ball 10 In the operating state of the spray head 44 shown here, the ball 10 is located to the right of the center of channel 9 in the vicinity of the bypass outlet 15. As a result, the available for the liquid passage cross-section of the bypass outlet 15 is reduced. The pressure through the aqueous fluid in the bypass increases, so that the ball 1 1 is pushed back to the left. In particular, the ball 10 is pushed over the middle of channel 9 to the left. The operating state then present is illustrated by the operating state of spray head 45. Subsequently, the ball 10 moves back into the means of channel 9.
  • FIG. 4 shows an enlarged section through the cleaning device 7 of FIG. 3, wherein the generation of a liquid jet in the spray head 46 according to FIG. 3 can be seen more clearly.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un séchoir à condensation (1) comprenant une chambre de séchage (3) destinée à des objets à sécher, un canal à air de traitement (2) dans lequel se trouvent un chauffage (4) destiné à chauffer l'air de traitement, un échangeur de chaleur (5, 39) pour refroidir l'air de traitement après son passage par la chambre de séchage (3) et un ventilateur (6) pour le transport de l'air de traitement, un dispositif de nettoyage (7) qui fonctionne avec un liquide aqueux (26) et produit au moins un jet de liquide, et un dispositif de commande (8), le dispositif de nettoyage (7) modifiant la direction et/ou l'intensité dudit jet de liquide pendant son fonctionnement. Le dispositif de nettoyage (7) présente un système fixe par rapport à l'échangeur de chaleur (5, 39) comprenant au moins une buse (13) destinée à produire ledit jet de liquide ainsi qu'au moins un corps mobile (10) qui permet de modifier la direction et/ou l'intensité dudit jet de liquide. L'invention concerne également un procédé préféré pour faire fonctionner ce séchoir à condensation.
EP11722051.7A 2010-06-09 2011-05-25 Séchoir à condensation à nettoyage d'échangeur de chaleur intégré et procédé pour le faire fonctionner Withdrawn EP2580386A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010029892A DE102010029892A1 (de) 2010-06-09 2010-06-09 Kondensationstrockner mit integrierter Wärmetauscherreinigung sowie Verfahren zu seinem Betrieb
PCT/EP2011/058533 WO2011154252A1 (fr) 2010-06-09 2011-05-25 Séchoir à condensation à nettoyage d'échangeur de chaleur intégré et procédé pour le faire fonctionner

Publications (1)

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EP2580386A1 true EP2580386A1 (fr) 2013-04-17

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EP11722051.7A Withdrawn EP2580386A1 (fr) 2010-06-09 2011-05-25 Séchoir à condensation à nettoyage d'échangeur de chaleur intégré et procédé pour le faire fonctionner

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EP (1) EP2580386A1 (fr)
CN (1) CN103097602A (fr)
DE (1) DE102010029892A1 (fr)
WO (1) WO2011154252A1 (fr)

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EP2628846B1 (fr) * 2012-02-20 2018-11-14 Electrolux Home Products Corporation N.V. Appareil de traitement du linge avec nettoyage d'échangeur de chaleur
US20130255095A1 (en) * 2012-03-27 2013-10-03 Bsh Bosch Und Siemens Hausgerate Gmbh Clothes treatment appliance with condenser and cleaning device
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CN106017204A (zh) * 2016-06-30 2016-10-12 无锡小天鹅股份有限公司 干衣机用换热器的清洁装置和具有其的干衣机
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CN103097602A (zh) 2013-05-08
DE102010029892A1 (de) 2011-12-15

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