EP3135803A1 - Process air arrangement for a drying device and drying device - Google Patents
Process air arrangement for a drying device and drying device Download PDFInfo
- Publication number
- EP3135803A1 EP3135803A1 EP16183127.6A EP16183127A EP3135803A1 EP 3135803 A1 EP3135803 A1 EP 3135803A1 EP 16183127 A EP16183127 A EP 16183127A EP 3135803 A1 EP3135803 A1 EP 3135803A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- process air
- air duct
- additional
- arrangement
- outlet
- 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
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Classifications
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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 dryers
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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
- D06F58/30—Drying processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
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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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/28—Air properties
- D06F2103/36—Flow or velocity
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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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/16—Air properties
- D06F2105/24—Flow or velocity
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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
- D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air
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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 dryers
- D06F58/206—Heat pump arrangements
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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 dryers
- D06F58/22—Lint collecting arrangements
Definitions
- the invention relates to a process air arrangement for a drying apparatus, in particular a washer dryer or a tumble dryer, comprising at least one process air blower, which is designed as a radial fan and has a housing which widens spirally with respect to a drive axis of a rotor wheel of the process air blower to a process air outlet, and at least one process air duct fluidly connected to the process air outlet.
- a process air blower which is designed as a radial fan and has a housing which widens spirally with respect to a drive axis of a rotor wheel of the process air blower to a process air outlet, and at least one process air duct fluidly connected to the process air outlet.
- the invention relates to a drying device, in particular a washer-dryer or a tumble dryer, comprising at least one process air system, the at least one process air cycle, at least one process air blower integrated in the process air cycle and at least one inside the process air cycle and on the suction side upstream of the process air blower component, in particular a heat exchanger, comprises at least one flushing system for cleaning the component in the course of at least one flushing operation, and at least one device electronics for controlling and / or regulating the process air blower and the flushing system, which is configured to activate the process air blower at least temporarily during the flushing process.
- a drying device in particular a washer-dryer or a tumble dryer, comprising at least one process air system, the at least one process air cycle, at least one process air blower integrated in the process air cycle and at least one inside the process air cycle and on the suction side upstream of the process air blower component, in particular a heat exchanger, comprises at least one flushing system for cleaning the component in the course of at least one
- the DE 10 2012 213 930 A1 discloses a process air arrangement for a drying device, in particular a washer-dryer or a tumble dryer.
- the process air arrangement comprises a process air blower which is designed as a radial blower and has a housing which widens spirally with respect to a drive axis of a rotor wheel of the process air blower to a process air outlet.
- the process air arrangement comprises a process air channel which connects in a fluid-conducting manner to the process air outlet.
- the household drying apparatus comprises a process air system, which includes a closed process air cycle, a process air blower integrated in the process air cycle, and a component arranged inside the process air cycle and upstream of the process air blower on the suction side Has a shape of a heat exchanger.
- the household drying device further comprises a flushing system for cleaning the component in the course of at least one flushing operation.
- the household drying device comprises an electronic control device for controlling the process air blower and the rinsing system, which is set up to activate the process air blower at least temporarily during the rinsing process.
- the washing liquid used for cleaning the component is entrained by the process air flow generated by the process air blower. This improves the cleaning of the component and also allows a cleaning of possibly downstream of the component arranged further components of the process air system.
- An object of the invention is to improve an operation of a drying device of the type mentioned.
- a process air arrangement according to the invention for a drying device in particular a washer dryer or a tumble dryer, accordingly comprises at least one process air blower, which is designed as a radial blower and has a housing which widens spirally with respect to a drive axis of a rotor wheel of the process air blower to a process air outlet.
- the process arrangement according to the invention comprises at least one process air duct, which adjoins the process air outlet in a fluid-conducting manner, and at least one additional process air duct arranged radially on the outside of a part of the housing and adjacent to a section of the process air duct.
- At least one outlet opening is arranged on a radially outer wall of the housing and at least one inlet opening is arranged on the process air channel, with the additional process air channel communicating in this way connected to the outlet breakthrough and the inlet breakthrough that process air via the outlet breakthrough from the housing in the additional process air channel and can enter via the inlet opening from the additional process air duct in the process air duct.
- the process air blower is flown axially by a process air flow, which reaches the process air blower via a process air duct connected upstream of the process air blower on the suction side or is drawn in by it.
- a process air duct connected upstream of the process air blower on the suction side or is drawn in by it.
- at least one component, in particular a heat exchanger of a heat pump, of the drying device can be arranged. Since the process air blower is designed as a radial fan, the process air guided inside the spiral housing exits radially or tangentially out of the process air outlet of the housing. The process air thus emerging from the housing passes directly into the process air channel which adjoins the process air outlet in a fluid-conducting manner. About this, the process air can be fed to a washing drum of the drying device in order to be able to flow through them for drying laundry.
- part of the process air conducted in the housing can exit the housing through the opened outlet opening and enter the additional process air channel. This is supported by the centrifugal forces acting on the process air in the housing.
- the process air flowing through the additional process air duct can exit from the additional process air blower via the inlet opening and enter the process air duct.
- the process air can thus be divided in the process air arrangement according to the invention in two different process air flows, namely a process air flow that does not enter the additional process air duct and leaves the housing via the process air outlet, and another process air flow that passes through the additional process air duct. This makes possible in particular a separate treatment of the further process air flow within the additional process air duct.
- the process air drawn in by the process air blower can be laden with moisture.
- the process air arrangement according to the invention is used in the case of an above-mentioned drying device in the form of a washer-dryer or a tumble dryer, the moisture contained in the process air can be obtained from a flushing process come during which the process air blower has been at least partially activated.
- the flushing liquid used for cleaning the component is entrained by the process air flow generated by the process air blower in order to achieve improved cleaning of the component and possibly additional cleaning downstream of the component arranged further components.
- the process air flow is thus formed as a multiphase flow, in particular as a two-phase flow with a gaseous phase formed by air and a liquid phase formed by the cleaning fluid, which may be contaminated with lint.
- the centrifugal forces acting on the two-phase flow are different due to the different density of the two phases.
- the different centrifugal forces and the different inertia of the two phases cause the liquid phase is pushed radially outward than the gaseous phase.
- the liquid phase tends increasingly to enter the additional process air duct via the outlet opening.
- the flow paths of the two phases are separated from each other. This separation is further facilitated by the fact that smaller liquid droplets in mutual contact combine to form larger liquid droplets, which have a higher inertia.
- the two-phase flow with the higher liquid content is passed through the additional process air channel, while the two-phase flow with the lower liquid content remains in the housing and exits the process air outlet.
- the two-phase flow with the higher liquid content can be treated in the additional process air duct to selectively stop the contaminated with the lint liquid phase or liquid as far as possible and thus prevent it from entering the process air duct and this downstream washing drum of the drying device.
- the process air channel may extend substantially from the outlet aperture to the inlet aperture.
- the additional process air duct widens, at least in the region of a portion of the exhaust section adjacent to the outlet opening additional process air duct according to the housing in a spiral shape.
- Two or more outlet openings can also be arranged on the radially outer wall of the housing. Also on the process air duct two or more inlet openings can be arranged.
- At least one air-permeable separating body for separating moisture from a process air flowing into the additional process air duct is arranged in the region of the outlet opening.
- the separation body may be formed, for example, porous. Due to the adhesion forces acting between the liquid phase and the separation body, the liquid phase can be optimally deposited on the separation body or removed from the two-phase flow entering the additional process air channel.
- the separation body can be arranged completely within the additional process air channel.
- At least one labyrinth-like separation structure for separating moisture from a process air flowing through the additional process air duct is arranged in a region of the additional process air duct located between the outlet opening and the inlet opening within the additional process air duct.
- the separation effect of the additional process air channel can be increased with the separation construction.
- With the separation construction there is a multiple flow diversion of the moister two-phase flow flowing in the additional process air duct. Due to the higher mass inertia of the liquid phase contained in the two-phase flow, more frequent contact between the liquid phase and the separation structure occurs, as a result of which the liquid phase can precipitate on the separation structure.
- the separation construction has at least two separation louvers projecting in opposite directions into the additional process air channel, which are each arranged inclined so that their respective free end is arranged geodetically lower than their respectively opposite fixed end. This allows the on draining liquid from the separation lamellae under gravity effect, which prevents liquid residues or lint from settling on the separation lamellae. This thus prevents clogging of the separation structure with lint.
- the drying device comprises at least one lint filter arranged downstream of the additional process air duct and downstream of the labyrinth-like design.
- the lint filter can serve as an additional separation unit for separating the liquid contained in the process air flowing through the additional process air channel and containing the lint.
- the lint filter may comprise, for example, a fabric, in particular gauze.
- a further advantageous embodiment provides that at least one drain opening for discharging liquid from the additional process air duct is arranged at a geodetically deeply arranged portion of a side of the additional process air duct facing away from the housing. Liquid deposited in the additional process air duct from the process air flowing through it can flow under gravity to the drain opening and exit from the additional process air duct through it. There may also be two or more corresponding drain openings.
- the drying device may have a device for discharging liquid emerging from the discharge opening into a bottom-side region of the drying device. The device may be designed such that the liquid emerging from the discharge opening is led away under the action of gravity from the additional process air channel and directed into the bottom region of the drying device. There, the liquid in a liquid reservoir, such as a condensate collecting tray, stored or removed from the drying device.
- At least storage body for temporarily storing liquid is arranged.
- the liquid separated from the process air flowing in the additional process air duct can be temporarily stored.
- at least some blades of the rotor wheel of the process air blower are at least partially provided with a water-repellent surface. In this way it can be prevented, in particular, that in the process air blower axially flowing the process air blower, smaller liquid droplets are too entrained by the shearing forces of the gaseous phase flowing past, which would stand in the way of optimal separation of the two phases.
- the respective blade can be provided, for example, with a coating which forms the surface.
- the housing has a tangentially movably arranged tongue which limits the process air outlet on one side, wherein the outlet opening and the inlet opening are closable, each with a closing element, wherein the tongue is mechanically coupled to the closing elements so that the closing elements at a displacement of the tongue to reduce a cross-sectional area of the process air outlet in its respective open position and a displacement of the tongue to increase the cross-sectional area of the process air outlet to move into their respective closed position.
- the additional process air duct can be used if necessary, for example during the execution of a rinsing process of a component present in the process air cycle of the drying apparatus, in order to be able to carry out the described separation of moisture contained in the process air in an effective manner.
- the closing elements can be held in their respective closed positions.
- the process air arrangement may have a drive.
- the closing elements are formed by a strip-shaped and elastically formed closing component arranged spirally on an inner side of the radially outer wall of the housing facing the impeller wheel, which is fixed on the tongue and is carried along by the tongue when the latter is moved, wherein the closing component At least two openings are arranged, which are located in each case in its open position closing member at least partially in registration with the outlet opening or the inlet opening.
- An inventive drying device in particular washer-dryer or dryer, comprises at least one process air system comprising at least one process air cycle, at least one process air blower integrated in the process air cycle and at least one component arranged inside the process air cycle and upstream of the process air blower, in particular a heat exchanger.
- the drying device according to the invention comprises at least one rinsing system for cleaning the component in the course of at least one rinsing process and at least one device electronics for controlling and / or regulating the process air blower and the rinsing system, which is configured to activate the process air blower at least temporarily during the rinsing process.
- the drying device according to the invention comprises at least one process air arrangement according to one of the aforementioned embodiments or any combination thereof which forms a section of the process air cycle, wherein the process air blower is formed by the process air arrangement.
- the rinsing process according to the invention with activated process air blower can be repeated successively two or more times so that the separation mechanism realized by the various separation units mentioned above can be freed from fluff within the additional process air duct itself after the respective rinsing process.
- the cleaning of the component can in principle be carried out during a drying process carried out with the drying device.
- any further components of the process air system arranged downstream of the component can also be cleaned with the entrained cleaning liquid.
- the rinsing system of the drying device according to the invention can, for example, accordingly DE 10 2008 041 474 A1 or be formed differently. It may be arranged to apply an upstream input section of the component to be cleaned with the rinsing liquid.
- a rinsing liquid deposited water can serve on a condensation unit, which is collected in a condensate drip pan and pumped out of this to pressurize the component directly with the water or caching the water for later loading of the component in a liquid storage can.
- the device electronics of the drying device according to the invention may be formed by a main electronics of the drying device or separately.
- the device electronics can be set up to temporarily activate the process air blower during the rinsing process or during the entire rinsing process.
- the device electronics can be set up to clean the component in the course of two or more rinsing operations. In this case, the device electronics can activate the process air blower at least temporarily, in one, two or more, in particular all, rinsing operations.
- the additional process air duct can be designed as a non-destructive detachable unit. As a result, the additional process air duct can be taken from the drying device, cleaned separately and then placed again on the drying device.
- the drying device according to the invention can in particular be designed as a washer-dryer with which both washing operations and drying operations can be carried out, or as a tumble dryer, in particular a condensation laundry dryer, preferably a heat pump laundry dryer.
- the drying device may be suitable for household or industrial use.
- the process air cycle of the process air system of the drying device according to the invention may be designed to be closed.
- the fact that the process air blower of the process air system is integrated into the process air cycle should in particular mean that it is arranged partially or completely within the process air cycle.
- the component may be formed as a condensation unit, in particular as an evaporator of a heat pump, the drying device.
- the fact that the component is arranged within the process air cycle may mean that the component is formed by a technical component arranged completely within the process air cycle or by a section of a component of greater design arranged within the process air cycle.
- the fact that the component upstream of the process air blower on the suction side is intended to mean that the component is arranged upstream of the process air blower with respect to a process air flow within the process air cycle.
- Fig. 1 shows a schematic and perspective sectional view of an embodiment of a process air arrangement 1 for a not shown drying device in the form of a washer-dryer or a tumble dryer.
- the process air arrangement 1 comprises a process air blower 2 which is designed as a radial blower and has a housing 5 which spirals toward a process air outlet 4 with respect to a drive axis of a rotor wheel 3 of the process air blower 2. Furthermore, the process air arrangement 1 comprises a process air duct 6, which adjoins the process air outlet 4 in a fluid-conducting manner and from the in Fig. 1 only a section is shown. At least some blades 15 of the rotor wheel 3 may be at least partially provided with a water-repellent surface.
- the process air blower 1 further comprises an additional process air duct 7 arranged radially on the outside of a part of the housing 5 and adjacent to the shown section of the process air duct 6.
- a discharge opening 9 is located on a radially outer wall 8 of the housing 5 and on a wall 10 of the process air duct 6 an inlet opening 11 is arranged.
- the additional process air channel 7 communicates with the outlet opening 9 and the inlet aperture 11 in such a way that process air can enter the additional process air channel 7 via the outlet aperture 9 and enter the process air channel 6 via the inlet aperture 11 from the additional process air channel 7.
- an air-permeable separating body for separating moisture from a process air flowing into the additional process air duct 7 can be arranged.
- a labyrinth-like separation structure 12 for separating moisture from a process air flowing through the additional process air duct 7 is arranged.
- the separation structure 12 comprises two separation louvres 13 projecting in opposite directions into the additional process air channel 7.
- the separation lumps 13 may each be arranged inclined so that their respective free end is arranged geodetically lower than their respectively opposite fixed end.
- the process air arrangement 1 further comprises a lint filter 14 which is arranged downstream of the additional process air duct 7 and downstream of the labyrinth-like separation structure 12 and which is formed of gauze.
- Fig. 2 shows a schematic and perspective sectional view of another embodiment of a process air arrangement 1 for a process air arrangement 1 for a not shown drying device in the form of a washer-dryer or a tumble dryer.
- This process air arrangement 1 differs solely from the in Fig. 1 1, a discharge opening 16 for discharging liquid from the additional process air channel 7 is arranged at a geodetically lowest arranged portion of a side facing away from the housing 5 of the additional process air duct 7.
- Fig. 1 directed.
- Fig. 3 shows a schematic and perspective sectional view of another embodiment of a process air arrangement 1 for a not shown drying device in the form of a washer-dryer or a tumble dryer.
- This process air arrangement 1 differs solely from the in Fig. 1 shown embodiment, that within the additional process air duct 7 in a geodetically low-lying area of the additional process air duct 7, a memory-made of clay storage body 17 is arranged for temporarily storing liquid.
- Fig. 1 directed in order to avoid repetition, the above description also applies Fig. 1 directed.
- Fig. 4 shows a schematic representation of another embodiment of a process air arrangement 1 for a not shown drying device in the form of a washer-dryer or a tumble dryer.
- This process air arrangement 1 differs solely from the in Fig. 1 shown embodiment, that the housing has a tangentially corresponding to the double arrow 18 movably arranged tongue 19 which limits the process air outlet 4 on one side, the outlet opening 9 and the inlet opening 11 are each closed with a closing element 20, the tongue 19 mechanically to the closing elements 20 is coupled, that the closing elements 20 in a displacement of the tongue 19 to reduce a cross-sectional area of the process air outlet 4 (indicated by dashed lines) in their respective indicated by dashed lines opening position and a displacement the tongue 19 to increase the cross-sectional area of the process air outlet 4 (shown by solid lines) in their respective closed position shown in solid lines.
- the closing elements 20 are formed by a spirally arranged on a side facing the impeller 3 inside of the radially outer wall 8 of the housing 5, strip-shaped and elastically formed closing member 21 which is fixed to the tongue 19 and taken with a movement of the tongue 19 of this is at least two openings are arranged on the closure member 21, which are in each case at least partially in cover with the outlet breakthrough 11 and the inlet opening 9 at befindlichem in its open position closing member 21.
- Fig. 5 shows a schematic representation of an embodiment of a drying device 22 in the form of a washer-dryer or a tumble dryer.
- the drying device 22 comprises a process air system 23 which comprises a process air circuit 24, a process air blower integrated in the process air circuit 24 and a component 25 arranged upstream of the process air blower 2 in the process air circuit 24 in the form of an evaporator of a heat pump 26 thermally coupled to the process air circuit 24. Furthermore, the heat pump 26 includes a condenser 27, an expansion unit 28 and a compressor 29. A portion of the process air circuit 24 is formed by a laundry drum 30.
- the drying device 1 also comprises a schematically shown flushing system 31 for cleaning the component 25 in the course of at least one flushing operation.
- the drying device 1 comprises a device electronics 32 for controlling and / or regulating the process air blower 2 and the rinsing system 31, which is configured to activate the process air blower 2 at least temporarily during the rinsing process.
- the drying device 1 comprises a process air arrangement 1, which, for example, according to one of the in the Fig. 1 to 4 shown embodiments may be formed.
- the process air arrangement 1 forms a section of the process air circuit 24, wherein the process air blower 2 is formed by the process air arrangement 1 or is a component thereof.
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- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
Die Erfindung betrifft eine Prozessluftanordnung 1 für ein Trocknungsgerät, insbesondere einen Waschtrockner oder einen Wäschetrockner, aufweisend wenigstens ein Prozessluftgebläse 2, das als Radialgebläse ausgebildet ist und ein sich bezüglich einer Antriebsachse eines Läuferrads 3 des Prozessluftgebläses 2 spiralförmig zu einem Prozessluftauslass 4 aufweitendes Gehäuse 5 aufweist, und wenigstens einen Prozessluftkanal 6, der sich fluidleitend an den Prozessluftauslass 4 anschließt. Um einen Betrieb eines solchen Trocknungsgeräts 22 zu optimieren, wird mit der Erfindung vorgeschlagen, dass es wenigstens einen radial außen an einem Teil des Gehäuses 5 und benachbart zu einem Abschnitt des Prozessluftkanals 6 angeordneten zusätzlichen Prozessluftkanal 7 aufweist, wobei an einer radial außen liegenden Wand 8 des Gehäuses 5 wenigstens ein Auslassdurchbruch 9 und an dem Prozessluftkanal 6 wenigstens ein Einlassdurchbruch 11 angeordnet sind, und wobei der zusätzliche Prozessluftkanal 7 derart kommunizierend mit dem Auslassdurchbruch 9 und dem Einlassdurchbruch 11 verbunden ist, dass Prozessluft über den Auslassdurchbruch 9 aus dem Gehäuse 5 in den zusätzlichen Prozessluftkanal 7 eintreten und über den Einlassdurchbruch 11 aus dem zusätzlichen Prozessluftkanal 7 in den Prozessluftkanal 6 eintreten kann. The invention relates to a process air arrangement 1 for a drying apparatus, in particular a washer dryer or a tumble dryer, comprising at least one process air blower 2, which is designed as a radial blower and has a housing 5 that spirals toward a process air outlet 4 with respect to a drive axis of a rotor wheel 3 of the process air blower 2, and at least one process air channel 6, which connects in a fluid-conducting manner to the process air outlet 4. In order to optimize the operation of such a drying device 22, it is proposed with the invention that it has at least one additional process air channel 7 arranged radially on the outside of a part of the housing 5 and adjacent to a section of the process air channel 6, wherein on a radially outer wall 8 at least one outlet aperture 9 and at the process air channel 6 at least one inlet aperture 11 are arranged, and wherein the additional process air channel 7 communicating with the outlet aperture 9 and the inlet aperture 11 is connected so that process air through the outlet aperture 9 from the housing 5 in the can enter additional process air duct 7 and enter via the inlet opening 11 from the additional process air duct 7 in the process air duct 6.
Description
Die Erfindung betrifft eine Prozessluftanordnung für ein Trocknungsgerät, insbesondere einen Waschtrockner oder einen Wäschetrockner, aufweisend wenigstens ein Prozessluftgebläse, das als Radialgebläse ausgebildet ist und ein sich bezüglich einer Antriebsachse eines Läuferrads des Prozessluftgebläses spiralförmig zu einem Prozessluftauslass aufweitendes Gehäuse aufweist, und wenigstens einen Prozessluftkanal, der sich fluidleitend an den Prozessluftauslass anschließt.The invention relates to a process air arrangement for a drying apparatus, in particular a washer dryer or a tumble dryer, comprising at least one process air blower, which is designed as a radial fan and has a housing which widens spirally with respect to a drive axis of a rotor wheel of the process air blower to a process air outlet, and at least one process air duct fluidly connected to the process air outlet.
Des Weiteren betrifft die Erfindung ein Trocknungsgerät, insbesondere einen Waschtrockner oder einen Wäschetrockner, aufweisend wenigstens ein Prozessluftsystem, das zumindest einen Prozessluftkreislauf, zumindest ein in den Prozessluftkreislauf integriertes Prozessluftgebläse sowie zumindest ein innerhalb des Prozessluftkreislaufs angeordnetes und saugseitig dem Prozessluftgebläse vorgeschaltetes Bauteil, insbesondere einen Wärmetauscher, umfasst, wenigstens ein Spülsystem zum Reinigen des Bauteils im Zuge von wenigstens einem Spülvorgang, und wenigstens eine Geräteelektronik zum Steuern und/oder Regeln des Prozessluftgebläses und des Spülsystems, die eingerichtet ist, das Prozessluftgebläse zumindest zeitweilig während des Spülvorgangs zu aktivieren.Furthermore, the invention relates to a drying device, in particular a washer-dryer or a tumble dryer, comprising at least one process air system, the at least one process air cycle, at least one process air blower integrated in the process air cycle and at least one inside the process air cycle and on the suction side upstream of the process air blower component, in particular a heat exchanger, comprises at least one flushing system for cleaning the component in the course of at least one flushing operation, and at least one device electronics for controlling and / or regulating the process air blower and the flushing system, which is configured to activate the process air blower at least temporarily during the flushing process.
Die
Aus der
Eine Aufgabe der Erfindung ist es, einen Betrieb eines Trocknungsgeräts der eingangs genannten Art zu verbessern.An object of the invention is to improve an operation of a drying device of the type mentioned.
Diese Aufgabe wird jeweils gemäß den Gegenständen der unabhängigen Patentansprüche gelöst. Vorteilhafte, fakultative Ausgestaltungen sind insbesondere in den abhängigen Patentansprüchen angegeben, die jeweils für sich genommen oder in verschiedener Kombination miteinander einen weiterbildenden, insbesondere auch bevorzugten oder vorteilhaften, Aspekt der Erfindung darstellen können. Fakultative Ausgestaltungen ergeben sich auch aus der nachfolgenden Beschreibung sowie den Figuren der beigefügten Zeichnung.This object is achieved in each case according to the subjects of the independent claims. Advantageous, optional embodiments are specified in particular in the dependent claims, each of which, taken alone or in various combinations with one another, can represent a further developing, in particular also preferred or advantageous, aspect of the invention. Optional embodiments will become apparent from the following description and the figures of the accompanying drawings.
Eine erfindungsgemäße Prozessluftanordnung für ein Trocknungsgerät, insbesondere einen Waschtrockner oder einen Wäschetrockner, umfasst demnach wenigstens ein Prozessluftgebläse, das als Radialgebläse ausgebildet ist und ein sich bezüglich einer Antriebsachse eines Läuferrads des Prozessluftgebläses spiralförmig zu einem Prozessluftauslass aufweitendes Gehäuse aufweist. Des Weiteren umfasst die erfindungsgemäße Prozessanordnung wenigstens einen Prozessluftkanal, der sich fluidleitend an den Prozessluftauslass anschließt, und wenigstens einen radial außen an einem Teil des Gehäuses und benachbart zu einem Abschnitt des Prozessluftkanals angeordneten zusätzlichen Prozessluftkanal. An einer radial außen liegenden Wand des Gehäuses sind wenigstens ein Auslassdurchbruch und an dem Prozessluftkanal wenigstens ein Einlassdurchbruch angeordnet, wobei der zusätzliche Prozessluftkanal derart kommunizierend mit dem Auslassdurchbruch und dem Einlassdurchbruch verbunden ist, dass Prozessluft über den Auslassdurchbruch aus dem Gehäuse in den zusätzlichen Prozessluftkanal eintreten und über den Einlassdurchbruch aus dem zusätzlichen Prozessluftkanal in den Prozessluftkanal eintreten kann.A process air arrangement according to the invention for a drying device, in particular a washer dryer or a tumble dryer, accordingly comprises at least one process air blower, which is designed as a radial blower and has a housing which widens spirally with respect to a drive axis of a rotor wheel of the process air blower to a process air outlet. Furthermore, the process arrangement according to the invention comprises at least one process air duct, which adjoins the process air outlet in a fluid-conducting manner, and at least one additional process air duct arranged radially on the outside of a part of the housing and adjacent to a section of the process air duct. At least one outlet opening is arranged on a radially outer wall of the housing and at least one inlet opening is arranged on the process air channel, with the additional process air channel communicating in this way connected to the outlet breakthrough and the inlet breakthrough that process air via the outlet breakthrough from the housing in the additional process air channel and can enter via the inlet opening from the additional process air duct in the process air duct.
Das Prozessluftgebläse wird axial von einer Prozessluftströmung angeströmt, die über einen saugseitig dem Prozessluftgebläse vorgeschalteten Prozessluftkanal zu dem Prozessluftgebläse gelangt bzw. von diesem angesaugt wird. In dem vorgeschalteten Prozessluftkanal kann wenigstens ein Bauteil, insbesondere ein Wärmetauscher einer Wärmepumpe, des Trocknungsgeräts angeordnet sein. Da das Prozessluftgebläse als Radialgebläse ausgebildet ist, tritt die innerhalb des spiralförmigen Gehäuses geführte Prozessluft radial bzw. tangential aus dem Prozessluftauslass des Gehäuses aus. Die derart aus dem Gehäuse austretende Prozessluft gelangt unmittelbar in den sich fluidleitend an den Prozessluftauslass anschließenden Prozessluftkanal. Über diesen kann die Prozessluft zu einer Wäschetrommel des Trocknungsgeräts geführt werden, um diese zum Trocknen von Wäsche durchströmen zu können.The process air blower is flown axially by a process air flow, which reaches the process air blower via a process air duct connected upstream of the process air blower on the suction side or is drawn in by it. In the upstream process air duct, at least one component, in particular a heat exchanger of a heat pump, of the drying device can be arranged. Since the process air blower is designed as a radial fan, the process air guided inside the spiral housing exits radially or tangentially out of the process air outlet of the housing. The process air thus emerging from the housing passes directly into the process air channel which adjoins the process air outlet in a fluid-conducting manner. About this, the process air can be fed to a washing drum of the drying device in order to be able to flow through them for drying laundry.
Erfindungsgemäß kann ein Teil der in dem Gehäuse geführten Prozessluft durch den geöffneten Auslassdurchbruch aus dem Gehäuse austreten und in den zusätzlichen Prozessluftkanal eintreten. Dies wird durch die auf die Prozessluft im Gehäuse einwirkenden Zentrifugalkräfte unterstützt. Die durch den zusätzlichen Prozessluftkanal strömende Prozessluft kann über den Einlassdurchbruch aus dem zusätzlichen Prozessluftgebläse austreten und in den Prozessluftkanal eintreten. Die Prozessluft kann bei der erfindungsgemäßen Prozessluftanordnung somit in zwei verschiedene Prozessluftströmungen aufgeteilt werden, nämlich eine Prozessluftströmung, die nicht in den zusätzlichen Prozessluftkanal eintritt und das Gehäuse über den Prozessluftauslass verlässt, und eine weitere Prozessluftströmung, die durch den zusätzlichen Prozessluftkanal verläuft. Dies macht insbesondere eine separate Behandlung der weiteren Prozessluftströmung innerhalb des zusätzlichen Prozessluftkanals möglich.According to the invention, part of the process air conducted in the housing can exit the housing through the opened outlet opening and enter the additional process air channel. This is supported by the centrifugal forces acting on the process air in the housing. The process air flowing through the additional process air duct can exit from the additional process air blower via the inlet opening and enter the process air duct. The process air can thus be divided in the process air arrangement according to the invention in two different process air flows, namely a process air flow that does not enter the additional process air duct and leaves the housing via the process air outlet, and another process air flow that passes through the additional process air duct. This makes possible in particular a separate treatment of the further process air flow within the additional process air duct.
Die von dem Prozessluftgebläse angesaugte Prozessluft kann mit Feuchtigkeit beladen sein. Wird die erfindungsgemäße Prozessluftanordnung bei einem eingangs genannten Trocknungsgerät in Form eines Waschtrockners oder eines Wäschetrockners eingesetzt, kann die in der Prozessluft enthaltene Feuchtigkeit aus einem durchgeführten Spülvorgang stammen, während dem das Prozessluftgebläse zumindest teilweise aktiviert worden ist. Hierbei wird die zum Reinigen des Bauteils verwendete Spülflüssigkeit von der mit dem Prozessluftgebläse erzeugten Prozessluftströmung mitgerissen, um eine verbesserte Reinigung des Bauteils und eventuell eine zusätzliche Reinigung von stromab des Bauteils angeordneten weiteren Bauteilen zu erzielen. Während eines Spülvorgangs und bei aktiviertem Prozessluftgebläse ist die Prozessluftströmung somit als Mehrphasenströmung, insbesondere als Zweiphasenströmung mit einer durch Luft gebildeten gasförmigen Phase und einer durch die Reinigungsflüssigkeit, die eventuell mit Flusen verunreinigt ist, gebildeten flüssigen Phase, ausgebildet.The process air drawn in by the process air blower can be laden with moisture. If the process air arrangement according to the invention is used in the case of an above-mentioned drying device in the form of a washer-dryer or a tumble dryer, the moisture contained in the process air can be obtained from a flushing process come during which the process air blower has been at least partially activated. In this case, the flushing liquid used for cleaning the component is entrained by the process air flow generated by the process air blower in order to achieve improved cleaning of the component and possibly additional cleaning downstream of the component arranged further components. During a purging operation and with the process air blower activated, the process air flow is thus formed as a multiphase flow, in particular as a two-phase flow with a gaseous phase formed by air and a liquid phase formed by the cleaning fluid, which may be contaminated with lint.
Die auf die Zweiphasenströmung einwirkenden Zentrifugalkräfte sind aufgrund der unterschiedlichen Dichte der beiden Phasen unterschiedlich groß. Die unterschiedlichen Zentrifugalkräfte und die unterschiedliche Massenträgheit der beiden Phasen führen dazu, dass die flüssige Phase stärker als die gasförmige Phase radial nach außen gedrängt wird. Hierdurch neigt die flüssige Phase verstärkt dazu, über den Auslassdurchbruch in den zusätzlichen Prozessluftkanal einzutreten. Dadurch werden die Strömungswege der beiden Phasen voneinander getrennt. Diese Trennung wird zusätzlich dadurch begünstigt, dass kleinere Flüssigkeitströpfchen bei gegenseitigem Kontakt sich zu größeren Flüssigkeitstropfen zusammenschließen, die eine höhere Massenträgheit aufweisen. Durch die Trennung der beiden Phasen werden zwei verschiedene Zweiphasenströmungen erzeugt, die sich in dem Anteil der jeweiligen flüssigen Phase deutlich voneinander unterscheiden. Die Zweiphasenströmung mit dem höheren Flüssigkeitsanteil wird durch den zusätzlichen Prozessluftkanal geführt, während die Zweiphasenströmung mit dem geringeren Flüssigkeitsanteil in dem Gehäuse verbleibt und aus dem Prozessluftauslass austritt. Die Zweiphasenströmung mit dem höheren Flüssigkeitsanteil kann in dem zusätzlichen Prozessluftkanal behandelt werden, um gezielt die mit den Flusen verunreinigte flüssige Phase bzw. Flüssigkeit weitestgehend aufzuhalten und somit von einem Eintritt in den Prozessluftkanal und die diesem nachgeschaltete Wäschetrommel des Trocknungsgeräts abzuhalten.The centrifugal forces acting on the two-phase flow are different due to the different density of the two phases. The different centrifugal forces and the different inertia of the two phases cause the liquid phase is pushed radially outward than the gaseous phase. As a result, the liquid phase tends increasingly to enter the additional process air duct via the outlet opening. As a result, the flow paths of the two phases are separated from each other. This separation is further facilitated by the fact that smaller liquid droplets in mutual contact combine to form larger liquid droplets, which have a higher inertia. By separating the two phases, two different two-phase flows are generated, which differ significantly in the proportion of the respective liquid phase. The two-phase flow with the higher liquid content is passed through the additional process air channel, while the two-phase flow with the lower liquid content remains in the housing and exits the process air outlet. The two-phase flow with the higher liquid content can be treated in the additional process air duct to selectively stop the contaminated with the lint liquid phase or liquid as far as possible and thus prevent it from entering the process air duct and this downstream washing drum of the drying device.
Der Prozessluftkanal kann sich im Wesentlichen von dem Auslassdurchbruch bis zum Einlassdurchbruch erstrecken. Vorzugsweise weitet sich der zusätzliche Prozessluftkanal zumindest im Bereich eines an den Auslassdurchbruch angrenzenden Abschnitts des zusätzlichen Prozessluftkanals entsprechend dem Gehäuse spiralförmig auf. An der radial außen liegenden Wand des Gehäuses können auch zwei oder mehrere Auslassdurchbrüche angeordnet sein. Auch an dem Prozessluftkanal können zwei oder mehrere Einlassdurchbrüche angeordnet sein.The process air channel may extend substantially from the outlet aperture to the inlet aperture. Preferably, the additional process air duct widens, at least in the region of a portion of the exhaust section adjacent to the outlet opening additional process air duct according to the housing in a spiral shape. Two or more outlet openings can also be arranged on the radially outer wall of the housing. Also on the process air duct two or more inlet openings can be arranged.
Gemäß einer vorteilhaften Ausgestaltung ist im Bereich des Auslassdurchbruchs wenigstens ein luftdurchlässiger Abscheidekörper zum Abscheiden von Feuchtigkeit aus einer in den zusätzlichen Prozessluftkanal einströmenden Prozessluft angeordnet. Der Abscheidekörper kann beispielsweise porös ausgebildet sein. Aufgrund der zwischen der flüssigen Phase und dem Abscheidekörper wirkenden Adhäsionskräfte kann die flüssige Phase optimal an dem Abscheidekörper abgeschieden bzw. aus der in den zusätzlichen Prozessluftkanal eintretenden Zweiphasenströmung entfernt werden. Der Abscheidekörper kann vollständig innerhalb des zusätzlichen Prozessluftkanals angeordnet sein.According to an advantageous embodiment, at least one air-permeable separating body for separating moisture from a process air flowing into the additional process air duct is arranged in the region of the outlet opening. The separation body may be formed, for example, porous. Due to the adhesion forces acting between the liquid phase and the separation body, the liquid phase can be optimally deposited on the separation body or removed from the two-phase flow entering the additional process air channel. The separation body can be arranged completely within the additional process air channel.
Nach einer weiteren vorteilhaften Ausgestaltung ist in einem zwischen dem Auslassdurchbruch und dem Einlassdurchbruch innerhalb des zusätzlichen Prozessluftkanals liegenden Bereich des zusätzlichen Prozessluftkanals wenigstens eine labyrinthartig ausgebildete Abscheidekonstruktion zum Abscheiden von Feuchtigkeit aus einer durch den zusätzlichen Prozessluftkanal strömenden Prozessluft angeordnet ist. Mit der Abscheidekonstruktion kann die Abscheidewirkung des zusätzlichen Prozessluftkanals erhöht werden. Mit der Abscheidekonstruktion erfolgt eine mehrfache Strömungsumlenkung der in dem zusätzlichen Prozessluftkanal strömenden feuchteren Zweiphasenströmung. Hierbei kommt es aufgrund der höheren Massenträgheit der in der Zweiphasenströmung enthaltenen flüssigen Phase zu einem häufigeren Kontakt zwischen der flüssigen Phase und der Abscheidekonstruktion, wodurch sich die flüssige Phase an der Abscheidekonstruktion niederschlagen kann.According to a further advantageous embodiment, at least one labyrinth-like separation structure for separating moisture from a process air flowing through the additional process air duct is arranged in a region of the additional process air duct located between the outlet opening and the inlet opening within the additional process air duct. The separation effect of the additional process air channel can be increased with the separation construction. With the separation construction, there is a multiple flow diversion of the moister two-phase flow flowing in the additional process air duct. Due to the higher mass inertia of the liquid phase contained in the two-phase flow, more frequent contact between the liquid phase and the separation structure occurs, as a result of which the liquid phase can precipitate on the separation structure.
Es ist des Weiteren von Vorteil, wenn die Abscheidekonstruktion wenigstens zwei gegenläufig in den zusätzlichen Prozessluftkanal ragende Abscheidelamellen aufweist, die jeweils derart geneigt angeordnet sind, dass ihr jeweiliges freies Ende geodätisch tiefer als ihr jeweilig gegenüberliegendes festes Ende angeordnet ist. Hierdurch kann die an den Abscheidelamellen anfallende Flüssigkeit von den Abscheidelamellen unter Schwerkraftwirkung abfließen, was verhindert, dass sich an den Abscheidelamellen Flüssigkeitsrückstände bzw. Flusen festsetzen. Dies verhindert somit ein Zusetzen bzw. Verstopfen der Abscheidekonstruktion mit Flusen.It is furthermore advantageous if the separation construction has at least two separation louvers projecting in opposite directions into the additional process air channel, which are each arranged inclined so that their respective free end is arranged geodetically lower than their respectively opposite fixed end. This allows the on draining liquid from the separation lamellae under gravity effect, which prevents liquid residues or lint from settling on the separation lamellae. This thus prevents clogging of the separation structure with lint.
Gemäß einer weiteren vorteilhaften Ausgestaltung umfasst das Trocknungsgerät wenigstens einen innerhalb des zusätzlichen Prozessluftkanals und stromabwärts der labyrinthartig ausgebildeten Abscheidekonstruktion nachgeschaltet angeordneten Flusenfilter. Der Flusenfilter kann als zusätzliche Abscheideeinheit zum Abscheiden der in der durch den zusätzlichen Prozessluftkanal strömenden, mit Flusen beladenen Prozessluft enthaltenen Flüssigkeit dienen. Der Flusenfilter kann beispielsweise ein Gewebe, insbesondere Gaze, aufweisen.According to a further advantageous embodiment, the drying device comprises at least one lint filter arranged downstream of the additional process air duct and downstream of the labyrinth-like design. The lint filter can serve as an additional separation unit for separating the liquid contained in the process air flowing through the additional process air channel and containing the lint. The lint filter may comprise, for example, a fabric, in particular gauze.
Eine weitere vorteilhafte Ausgestaltung sieht vor, dass an einem geodätisch tief angeordneten Abschnitt einer dem Gehäuse abgewandten Seite des zusätzlichen Prozessluftkanals wenigstens eine Ablauföffnung zum Abführen von Flüssigkeit aus dem zusätzlichen Prozessluftkanal angeordnet ist. In dem zusätzlichen Prozessluftkanal aus der dadurch strömenden Prozessluft abgeschiedene Flüssigkeit kann unter Schwerkraftwirkung zu der Ablauföffnung fließen und durch diese aus dem zusätzlichen Prozessluftkanal austreten. Es können auch zwei oder mehrere entsprechende Ablauföffnungen vorhanden sein. Das Trocknungsgerät kann eine Einrichtung zum Ableiten von aus der Ablauföffnung austretender Flüssigkeit in einen bodenseitigen Bereich des Trocknungsgeräts aufweisen. Die Einrichtung kann derart ausgebildet sein, dass die aus der Ablauföffnung austretende Flüssigkeit unter Wirkung der Schwerkraft von dem zusätzlichen Prozessluftkanal weggeführt und in den bodenseitigen Bereich des Trocknungsgeräts geleitet wird. Dort kann die Flüssigkeit in einem Flüssigkeitsreservoir, beispielsweise einer Kondensatauffangwanne, gespeichert oder aus dem Trocknungsgerät abgeführt werden.A further advantageous embodiment provides that at least one drain opening for discharging liquid from the additional process air duct is arranged at a geodetically deeply arranged portion of a side of the additional process air duct facing away from the housing. Liquid deposited in the additional process air duct from the process air flowing through it can flow under gravity to the drain opening and exit from the additional process air duct through it. There may also be two or more corresponding drain openings. The drying device may have a device for discharging liquid emerging from the discharge opening into a bottom-side region of the drying device. The device may be designed such that the liquid emerging from the discharge opening is led away under the action of gravity from the additional process air channel and directed into the bottom region of the drying device. There, the liquid in a liquid reservoir, such as a condensate collecting tray, stored or removed from the drying device.
Vorteilhafterweise ist innerhalb des zusätzlichen Prozessluftkanals in einem geodätisch tief liegenden Bereich des zusätzlichen Prozessluftkanals wenigstens Speicherkörper zum Zwischenspeichern von Flüssigkeit angeordnet. In dem Speicherkörper, beispielsweise einem aus Ton hergestellten Körper, kann die aus der in dem zusätzlichen Prozessluftkanal strömenden Prozessluft abgeschiedene Flüssigkeit zwischengespeichert werden. Nach einer weiteren vorteilhaften Ausgestaltung sind wenigstens manche Schaufeln des Läuferrads des Prozessluftgebläses zumindest teilweise mit einer wasserabweisenden Oberfläche versehen. Hierdurch kann insbesondere verhindert werden, dass in der axial das Prozessluftgebläse anströmenden Prozessluftströmung enthaltene, kleinere Flüssigkeitströpfchen von den Scherkräften der vorbei strömenden gasförmigen Phase zu stark mitgerissen werden, was einer optimalen Trennung der beiden Phasen im Wege stehen würde. Zur Erzeugung der wasserabweisenden Oberfläche kann die jeweilige Schaufel beispielsweise mit einer Beschichtung versehen sein, welche die Oberfläche ausbildet.Advantageously, within the additional process air duct in a geodetically low-lying region of the additional process air duct at least storage body for temporarily storing liquid is arranged. In the storage body, for example a body made of clay, the liquid separated from the process air flowing in the additional process air duct can be temporarily stored. According to a further advantageous embodiment, at least some blades of the rotor wheel of the process air blower are at least partially provided with a water-repellent surface. In this way it can be prevented, in particular, that in the process air blower axially flowing the process air blower, smaller liquid droplets are too entrained by the shearing forces of the gaseous phase flowing past, which would stand in the way of optimal separation of the two phases. To produce the water-repellent surface, the respective blade can be provided, for example, with a coating which forms the surface.
Gemäß einer weiteren vorteilhaften Ausgestaltung weist das Gehäuse eine tangential bewegbar angeordnete Zunge auf, die den Prozessluftauslass einseitig begrenzt, wobei der Auslassdurchbruch und der Einlassdurchbruch mit jeweils einem Schließelement verschließbar sind, wobei die Zunge mechanisch derart an die Schließelemente gekoppelt ist, dass sich die Schließelemente bei einer Verlagerung der Zunge zur Verkleinerung einer Querschnittsfläche des Prozessluftauslasses in ihre jeweilige Öffnungsstellung und bei einer Verlagerung der Zunge zur Vergrößerung der Querschnittsfläche des Prozessluftauslasses in ihre jeweilige Schließstellung bewegen. Mittels der Schließelemente kann der zusätzliche Prozessluftkanal bei Bedarf, beispielsweise während der Durchführung eines Spülvorgangs eines in dem Prozessluftkreislauf des Trocknungsgeräts vorhandenen Bauteils, eingesetzt werden, um die beschriebene Abscheidung von in der Prozessluft enthaltener Feuchtigkeit entsprechend effektiv durchführen zu können. In einem normalen Trocknungsbetrieb des Trocknungsgeräts können die Schließelemente in ihren jeweiligen Schließstellungen gehalten werden. Zum Bewegen der Zunge und der Schließelemente kann die Prozessluftanordnung einen Antrieb aufweisen.According to a further advantageous embodiment, the housing has a tangentially movably arranged tongue which limits the process air outlet on one side, wherein the outlet opening and the inlet opening are closable, each with a closing element, wherein the tongue is mechanically coupled to the closing elements so that the closing elements at a displacement of the tongue to reduce a cross-sectional area of the process air outlet in its respective open position and a displacement of the tongue to increase the cross-sectional area of the process air outlet to move into their respective closed position. By means of the closing elements, the additional process air duct can be used if necessary, for example during the execution of a rinsing process of a component present in the process air cycle of the drying apparatus, in order to be able to carry out the described separation of moisture contained in the process air in an effective manner. In a normal drying operation of the drying device, the closing elements can be held in their respective closed positions. For moving the tongue and the closing elements, the process air arrangement may have a drive.
Vorteilhafterweise sind die Schließelemente durch ein spiralförmig an einer dem Läuferrad zugewandten Innenseite der radial außen liegenden Wand des Gehäuses angeordnetes, streifenförmig und elastisch ausgebildetes Schließbauteil gebildet, das an der Zunge fixiert ist und bei einer Bewegung der Zunge von dieser mitgenommen wird, wobei an dem Schließbauteil wenigstens zwei Durchbrüche angeordnet sind, die bei in seiner Öffnungsstellung befindlichem Schließbauteil sich jeweils zumindest teilweise in Deckung mit dem Auslassdurchbruch bzw. dem Einlassdurchbruch befinden. Dies stellt eine konstruktiv einfache Ausgestaltung der Prozessluftanordnung dar.Advantageously, the closing elements are formed by a strip-shaped and elastically formed closing component arranged spirally on an inner side of the radially outer wall of the housing facing the impeller wheel, which is fixed on the tongue and is carried along by the tongue when the latter is moved, wherein the closing component At least two openings are arranged, which are located in each case in its open position closing member at least partially in registration with the outlet opening or the inlet opening. This represents a structurally simple embodiment of the process air arrangement.
Ein erfindungsgemäßes Trocknungsgerät, insbesondere Waschtrockner oder Wäschetrockner, umfasst wenigstens ein Prozessluftsystem, das zumindest einen Prozessluftkreislauf, zumindest ein in den Prozessluftkreislauf integriertes Prozessluftgebläse sowie zumindest ein innerhalb des Prozessluftkreislaufs angeordnetes und saugseitig dem Prozessluftgebläse vorgeschaltetes Bauteil, insbesondere einen Wärmetauscher, umfasst. Des Weiteren umfasst das erfindungsgemäße Trocknungsgerät wenigstens ein Spülsystem zum Reinigen des Bauteils im Zuge von wenigstens einem Spülvorgang sowie wenigstens eine Geräteelektronik zum Steuern und/oder Regeln des Prozessluftgebläses und des Spülsystems, die eingerichtet ist, das Prozessluftgebläse zumindest zeitweilig während des Spülvorgangs zu aktivieren. Ferner umfasst das erfindungsgemäße Trocknungsgerät wenigstens eine Prozessluftanordnung nach einer der vorgenannten Ausgestaltungen oder einer beliebigen Kombination derselben, die einen Abschnitt des Prozessluftkreislaufs ausbildet, wobei das Prozessluftgebläse durch die Prozessluftanordnung ausgebildet ist.An inventive drying device, in particular washer-dryer or dryer, comprises at least one process air system comprising at least one process air cycle, at least one process air blower integrated in the process air cycle and at least one component arranged inside the process air cycle and upstream of the process air blower, in particular a heat exchanger. Furthermore, the drying device according to the invention comprises at least one rinsing system for cleaning the component in the course of at least one rinsing process and at least one device electronics for controlling and / or regulating the process air blower and the rinsing system, which is configured to activate the process air blower at least temporarily during the rinsing process. Furthermore, the drying device according to the invention comprises at least one process air arrangement according to one of the aforementioned embodiments or any combination thereof which forms a section of the process air cycle, wherein the process air blower is formed by the process air arrangement.
Mit dem erfindungsgemäßen Trocknungsgerät sind die oben mit Bezug auf die Prozessluftanordnung genannten Vorteile entsprechend verbunden.With the drying device according to the invention, the advantages mentioned above with respect to the process air arrangement are connected accordingly.
Der erfindungsgemäße Spülvorgang mit aktiviertem Prozessluftgebläse kann aufeinanderfolgend zwei- oder mehrfach wiederholt werden, damit der durch die verschiedenen oben genannten Abscheideeinheiten realisierte Trennmechanismus innerhalb des zusätzlichen Prozessluftkanals nach dem jeweiligen Spülvorgang selbst von Flusen befreit werden kann.The rinsing process according to the invention with activated process air blower can be repeated successively two or more times so that the separation mechanism realized by the various separation units mentioned above can be freed from fluff within the additional process air duct itself after the respective rinsing process.
Durch die gemäß der Erfindung sehr effektive Abscheidung von Flüssigkeit und Flusen aus der Prozessluftströmung kann die Reinigung des Bauteils grundsätzlich auch während eines mit dem Trocknungsgerät durchgeführten Trocknungsvorgangs durchgeführt werden.Due to the very effective according to the invention separation of liquid and lint from the process air flow, the cleaning of the component can in principle be carried out during a drying process carried out with the drying device.
Während eines Spülvorgangs kann durch das Aktivieren des Prozessluftgebläses wenigstens ein Teil der zur Reinigung des Bauteils verwendeten Reinigungsflüssigkeit von der durch das Prozessluftgebläse erzeugten Prozessluftströmung mitgerissen werden und sich so über einen größeren Bereich innerhalb des Prozessluftkreislaufs verteilen, um das Bauteil insgesamt besser reinigen zu können. Zudem können auch eventuell stromabwärts des Bauteils angeordnete weitere Komponenten des Prozessluftsystems mit der mitgerissenen Reinigungsflüssigkeit gereinigt werden.During a rinsing process, by activating the process air blower, at least part of the cleaning liquid used for cleaning the component can be entrained by the process air flow generated by the process air blower and Distribute over a larger area within the process air cycle in order to better clean the component better. In addition, any further components of the process air system arranged downstream of the component can also be cleaned with the entrained cleaning liquid.
Dies ist insbesondere gegenüber herkömmlichen Trocknungsgeräten von Vorteil, deren Prozessluftsystem eine thermisch an den Prozessluftkreislauf gekoppelte Wärmepumpe aufweist und bei denen das Prozessluftgebläse während eines Spülvorgangs nicht aktiviert wird. Bei solchen herkömmlichen Trocknungsgeräten erfolgt in der Regel lediglich eine Spülung einer zuerst mit der aus einer Wäschetrommel des Trocknungsgeräts austretenden, Flusen enthaltenden Prozessluft in Kontakt kommenden Vorderseite eines Verdampfers der Wärmepumpe. Während eines mit dem Trocknungsgerät durchgeführten Trocknungsvorgangs wird jedoch nicht allein die Vorderseite des Verdampfers mit Flusen verunreinigt. Vielmehr werden der gesamte Verdampfer und auch der dem Verdampfer stromabwärts nachgeschaltete Kondensator der Wärmepumpe, insbesondere deren Wärmetauscherlamellen, mit Flusen verunreinigt, was den Betrieb der Wärmepumpe beeinträchtigt. Hiermit geht eine Verlängerung der Trocknungszeit und somit eine Verschlechterung der Energieeffizienz des Trocknungsgeräts einher. Im Extremfall kann eine solche Verunreinigung der Wärmetauscher der Wärmepumpe zu einem Totalausfall der Wärmepumpe nach einer verkürzten Lebensdauer führen. Die mit den herkömmlichen Trocknungsgeräten verbundenen, oben genannten Nachteile treten bei dem erfindungsgemäßen Trocknungsgerät wegen dessen verbesserter Reinigung des wenigstens einen Bauteils des Prozessluftsystems nicht auf, so dass insbesondere Kundenversprechungen bezüglich der Energieeffizienz und der Lebensdauer des Trocknungsgeräts zuverlässig eingehalten werden können.This is particularly advantageous over conventional drying devices whose process air system has a heat pump that is thermally coupled to the process air cycle and in which the process air blower is not activated during a rinsing process. In such conventional drying equipment is usually only a rinse of a first coming out of the laundry drum with a drying drum of the device emerging, lint containing process air in contact front of an evaporator of the heat pump. During a drying process carried out with the drying device, however, not only the front side of the evaporator is contaminated with lint. Rather, the entire evaporator and also the evaporator downstream downstream condenser of the heat pump, in particular their heat exchanger fins, contaminated with lint, which affects the operation of the heat pump. This is accompanied by an extension of the drying time and thus a deterioration of the energy efficiency of the drying device. In extreme cases, such contamination of the heat exchanger of the heat pump can lead to a total failure of the heat pump for a shortened life. The above-mentioned disadvantages associated with the conventional drying devices do not occur in the drying device according to the invention because of its improved cleaning of the at least one component of the process air system, so that in particular customer promises regarding the energy efficiency and the life of the drying device can be reliably maintained.
Das Spülsystem des erfindungsgemäßen Trocknungsgeräts kann beispielsweise entsprechend
Die Geräteelektronik des erfindungsgemäßen Trocknungsgeräts kann durch eine Hauptelektronik des Trocknungsgeräts oder separat davon ausgebildet sein. Die Geräteelektronik kann eingerichtet sein, das Prozessluftgebläse zeitweilig während des Spülvorgangs oder während des gesamten Spülvorgangs zu aktivieren. Die Geräteelektronik kann eingerichtet sein, das Bauteil im Zuge von zwei oder mehreren Spülvorgängen zu reinigen. Hierbei kann die Geräteelektronik das Prozessluftgebläse bei einem, zwei oder mehreren, insbesondere allen, Spülvorgängen zumindest zeitweilig aktivieren.The device electronics of the drying device according to the invention may be formed by a main electronics of the drying device or separately. The device electronics can be set up to temporarily activate the process air blower during the rinsing process or during the entire rinsing process. The device electronics can be set up to clean the component in the course of two or more rinsing operations. In this case, the device electronics can activate the process air blower at least temporarily, in one, two or more, in particular all, rinsing operations.
Der zusätzliche Prozessluftkanal kann als zerstörungsfrei lösbare Einheit ausgebildet sein. Hierdurch kann der zusätzliche Prozessluftkanal dem Trocknungsgerät entnommen, separat gereinigt und anschließend wieder an dem Trocknungsgerät angeordnet werden.The additional process air duct can be designed as a non-destructive detachable unit. As a result, the additional process air duct can be taken from the drying device, cleaned separately and then placed again on the drying device.
Das erfindungsgemäße Trocknungsgerät kann insbesondere als Waschtrockner, mit dem sowohl Waschvorgänge als auch Trocknungsvorgänge durchführbar sind, oder als Wäschetrockner, insbesondere Kondensationswäschetrockner, bevorzugt Wärmepumpen-Wäschetrockner, ausgebildet sein. Das Trocknungsgerät kann für einen Hausgebrauch oder einen Industriegebrauch geeignet sein.The drying device according to the invention can in particular be designed as a washer-dryer with which both washing operations and drying operations can be carried out, or as a tumble dryer, in particular a condensation laundry dryer, preferably a heat pump laundry dryer. The drying device may be suitable for household or industrial use.
Der Prozessluftkreislauf des Prozessluftsystems des erfindungsgemäßen Trocknungsgeräts kann geschlossen ausgebildet sein. Dass das Prozessluftgebläse des Prozessluftsystems in den Prozessluftkreislauf integriert ist, soll insbesondere bedeuten, dass es teilweise oder vollständig innerhalb des Prozessluftkreislaufs angeordnet ist.The process air cycle of the process air system of the drying device according to the invention may be designed to be closed. The fact that the process air blower of the process air system is integrated into the process air cycle should in particular mean that it is arranged partially or completely within the process air cycle.
Das Bauteil kann als Kondensationseinheit, insbesondere als Verdampfer einer Wärmepumpe, des Trocknungsgeräts ausgebildet sein. Dass das Bauteil innerhalb des Prozessluftkreislaufs angeordnet ist, kann bedeuten, dass das Bauteil durch eine vollständig innerhalb des Prozessluftkreislaufs angeordnete technische Komponente oder durch einen innerhalb des Prozessluftkreislaufs angeordneten Abschnitt einer größer ausgebildeten Komponente gebildet ist. Dass das Bauteil saugseitig dem Prozessluftgebläse vorgeschaltet ist, soll bedeuten, dass das Bauteil bezüglich einer Prozessluftströmung innerhalb des Prozessluftkreislaufs stromaufwärts zu dem Prozessluftgebläse angeordnet ist.The component may be formed as a condensation unit, in particular as an evaporator of a heat pump, the drying device. The fact that the component is arranged within the process air cycle may mean that the component is formed by a technical component arranged completely within the process air cycle or by a section of a component of greater design arranged within the process air cycle. The fact that the component upstream of the process air blower on the suction side is intended to mean that the component is arranged upstream of the process air blower with respect to a process air flow within the process air cycle.
Die Erfindung ist nicht auf die angegebene Kombination der Merkmale der unabhängigen Patentansprüche und der abhängigen Patentansprüche beschränkt. Es ergeben sich darüber hinaus weitere Möglichkeiten, einzelne Merkmale, insbesondere dann, wenn sie sich aus den Patentansprüchen, der nachfolgenden Beschreibung der Ausführungsbeispiele oder unmittelbar aus den Figuren ergeben, miteinander zu kombinieren. Außerdem soll die Bezugnahme der Patentansprüche auf die Figuren durch die Verwendung von Bezugszeichen den Schutzumfang der Patentansprüche auf keinen Fall auf die dargestellten Ausführungsbeispiele beschränken.The invention is not limited to the specified combination of the features of the independent claims and the dependent claims. In addition, there are further possibilities of combining individual features, in particular if they result from the patent claims, the following description of the exemplary embodiments or directly from the figures. In addition, the reference of the claims to the figures by the use of reference numerals is not intended to limit the scope of the claims to the illustrated embodiments.
Im Folgenden wird die Erfindung unter Bezugnahme auf die Figuren der beigefügten Zeichnung anhand von bevorzugten Ausführungsformen exemplarisch erläutert, wobei die nachfolgend erläuterten Merkmale sowohl jeweils für sich genommen als auch in unterschiedlicher Kombination miteinander einen Aspekt der Erfindung darstellen können. Es zeigen:
- Fig. 1
- eine schematische und perspektivische Schnittdarstellung eines Ausführungsbeispiels für eine Prozessluftanordnung;
- Fig. 2
- eine schematische und perspektivische Schnittdarstellung eines weiteren Ausführungsbeispiels für eine Prozessluftanordnung;
- Fig. 3
- eine schematische und perspektivische Schnittdarstellung eines weiteren Ausführungsbeispiels für eine Prozessluftanordnung;
- Fig. 4
- eine schematische Darstellung eines weiteren Ausführungsbeispiels für eine Prozessluftanordnung; und
- Fig. 5
- eine schematische Darstellung eines Ausführungsbeispiels für ein Trocknungsgerät.
- Fig. 1
- a schematic and perspective sectional view of an embodiment of a process air arrangement;
- Fig. 2
- a schematic and perspective sectional view of another embodiment of a process air arrangement;
- Fig. 3
- a schematic and perspective sectional view of another embodiment of a process air arrangement;
- Fig. 4
- a schematic representation of another embodiment of a process air arrangement; and
- Fig. 5
- a schematic representation of an embodiment of a drying device.
In den Figuren sind gleiche bzw. funktionsgleiche Bauteile jeweils mit den gleichen Bezugszeichen versehen.In the figures, the same or functionally identical components are each provided with the same reference numerals.
Die Prozessluftanordnung 1 umfasst ein Prozessluftgebläse 2, das als Radialgebläse ausgebildet ist und ein sich bezüglich einer Antriebsachse eines Läuferrads 3 des Prozessluftgebläses 2 spiralförmig zu einem Prozessluftauslass 4 aufweitendes Gehäuse 5 aufweist. Des Weiteren umfasst die Prozessluftanordnung 1 einen Prozessluftkanal 6, der sich fluidleitend an den Prozessluftauslass 4 anschließt und von dem in
Das Prozessluftgebläse 1 umfasst zudem einen radial außen an einem Teil des Gehäuses 5 und benachbart zu dem gezeigten Abschnitt des Prozessluftkanals 6 angeordneten zusätzlichen Prozessluftkanal 7. An einer radial außen liegenden Wand 8 des Gehäuses 5 ist ein Auslassdurchbruch 9 und an einer Wand 10 des Prozessluftkanals 6 ist ein Einlassdurchbruch 11 angeordnet. Der zusätzliche Prozessluftkanal 7 ist derart kommunizierend mit dem Auslassdurchbruch 9 und dem Einlassdurchbruch 11 verbunden, dass Prozessluft über den Auslassdurchbruch 9 aus dem Gehäuse 5 in den zusätzlichen Prozessluftkanal 7 eintreten und über den Einlassdurchbruch 11 aus dem zusätzlichen Prozessluftkanal 7 in den Prozessluftkanal 6 eintreten kann. Im Bereich des Auslassdurchbruchs 9 kann ein luftdurchlässiger Abscheidekörper zum Abscheiden von Feuchtigkeit aus einer in den zusätzlichen Prozessluftkanal 7 einströmenden Prozessluft angeordnet sein.The
In einem zwischen dem Auslassdurchbruch 9 und dem Einlassdurchbruch 11 innerhalb des zusätzlichen Prozessluftkanals 7 liegenden Bereich des zusätzlichen Prozessluftkanals 7 ist eine labyrinthartig ausgebildete Abscheidekonstruktion 12 zum Abscheiden von Feuchtigkeit aus einer durch den zusätzlichen Prozessluftkanal 7 strömenden Prozessluft angeordnet. Die Abscheidekonstruktion 12 umfasst zwei gegenläufig in den zusätzlichen Prozessluftkanal 7 ragende Abscheidelamellen 13. Die Abscheidelammelen 13 können jeweils derart geneigt angeordnet sein, dass ihr jeweiliges freies Ende geodätisch tiefer als ihr jeweilig gegenüberliegendes festes Ende angeordnet ist.In a region of the additional process air duct 7 located between the
Die Prozessluftanordnung 1 umfasst des Weiteren eine innerhalb des zusätzlichen Prozessluftkanals 7 und stromabwärts der labyrinthartig ausgebildeten Abscheidekonstruktion 12 nachgeschaltet angeordneten Flusenfilter 14, der aus Gaze gebildet ist.The
Das Trocknungsgerät 22 umfasst ein Prozessluftsystem 23, das einen Prozessluftkreislauf 24, ein in den Prozessluftkreislauf 24 integriertes Prozessluftgebläse sowie ein innerhalb des Prozessluftkreislaufs 24 angeordnetes und saugseitig dem Prozessluftgebläse 2 vorgeschaltetes Bauteil 25 in Form eines Verdampfers einer thermisch an den Prozessluftkreislauf 24 gekoppelten Wärmepumpe 26 umfasst. Des Weiteren umfasst die Wärmepumpe 26 einen Kondensator 27, eine Expansionseinheit 28 und einen Kompressor 29. Ein Abschnitt des Prozessluftkreislaufs 24 ist durch eine Wäschetrommel 30 gebildet.The drying
Das Trocknungsgerät 1 umfasst zudem ein schematisch gezeigtes Spülsystem 31 zum Reinigen des Bauteils 25 im Zuge von wenigstens einem Spülvorgang. Zudem umfasst das Trocknungsgerät 1 eine Geräteelektronik 32 zum Steuern und/oder Regeln des Prozessluftgebläses 2 und des Spülsystems 31, die eingerichtet ist, das Prozessluftgebläse 2 zumindest zeitweilig während des Spülvorgangs zu aktivieren.The
Ferner umfasst das Trocknungsgerät 1 eine Prozessluftanordnung 1, die beispielsweise gemäß einem der in den
- 11
- ProzessluftanordnungProcess air arrangement
- 22
- ProzessluftgebläseProcess air fan
- 33
- Läuferradimpeller
- 44
- Prozessluftauslassprocess air
- 55
- Gehäusecasing
- 66
- ProzessluftkanalProcess air duct
- 77
- zusätzlicher Prozessluftkanaladditional process air duct
- 88th
- Wandwall
- 99
- AuslassdurchbruchAuslassdurchbruch
- 1010
- Wandwall
- 1111
- EinlassdurchbruchInlet breakthrough
- 1212
- AbscheidekonstruktionAbscheidekonstruktion
- 1313
- AbscheidelamelleAbscheidelamelle
- 1414
- Flusenfilterlint filter
- 1515
- Schaufelshovel
- 1616
- Ablauföffnungdrain hole
- 1717
- Speicherkörperstorage body
- 1818
- Doppelpfeildouble arrow
- 1919
- Zungetongue
- 2020
- Schließelementclosing element
- 2121
- Schließbauteilclose member
- 2222
- Trocknungsgerätdrying device
- 2323
- ProzessluftsystemProcess air system
- 2424
- ProzessluftkreislaufProcess air circuit
- 2525
- Bauteil (Verdampfer)Component (evaporator)
- 2626
- Wärmepumpeheat pump
- 2727
- Kondensatorcapacitor
- 2828
- Expansionseinheitexpansion unit
- 2929
- Kompressorcompressor
- 3030
- Wäschetrommelwashing drum
- 3131
- Spülsystemflushing system
- 3232
- Geräteelektronikelectronics
Claims (11)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015216383.0A DE102015216383A1 (en) | 2015-08-27 | 2015-08-27 | Process air arrangement for a drying device and drying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3135803A1 true EP3135803A1 (en) | 2017-03-01 |
| EP3135803B1 EP3135803B1 (en) | 2018-04-18 |
Family
ID=56609785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16183127.6A Not-in-force EP3135803B1 (en) | 2015-08-27 | 2016-08-05 | Process air arrangement for a drying device and drying device |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3135803B1 (en) |
| CN (1) | CN106480638A (en) |
| DE (1) | DE102015216383A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911425A (en) * | 2020-06-30 | 2020-11-10 | 青岛海尔空调电子有限公司 | Centrifugal fan and air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080199311A1 (en) * | 2007-02-20 | 2008-08-21 | Behr America, Inc. | Blower scroll |
| DE102008041474A1 (en) | 2008-08-22 | 2010-02-25 | BSH Bosch und Siemens Hausgeräte GmbH | Household drying apparatus and method for cleaning a component, in particular an evaporator of a condenser device of such a household drying device |
| DE102012213930A1 (en) | 2012-08-07 | 2014-02-13 | BSH Bosch und Siemens Hausgeräte GmbH | Blower with air inlet nozzle for swirling air flow and air inlet nozzle for a blower |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4436673B4 (en) * | 1994-10-13 | 2007-02-08 | BSH Bosch und Siemens Hausgeräte GmbH | Automatic washing machine set up for drying |
| DE102006061211A1 (en) * | 2006-12-22 | 2008-06-26 | BSH Bosch und Siemens Hausgeräte GmbH | Method for removing lint from a heat exchanger of a domestic appliance, and corresponding domestic appliance |
| DE102007022097A1 (en) * | 2007-05-11 | 2008-11-13 | BSH Bosch und Siemens Hausgeräte GmbH | Blower for a tumble dryer |
| EP2468946B1 (en) * | 2010-12-27 | 2014-05-07 | Electrolux Home Products Corporation N.V. | A heat pump system for a laundry dryer and a method for operating a heat pump laundry dryer |
-
2015
- 2015-08-27 DE DE102015216383.0A patent/DE102015216383A1/en not_active Withdrawn
-
2016
- 2016-08-05 EP EP16183127.6A patent/EP3135803B1/en not_active Not-in-force
- 2016-08-29 CN CN201610757881.0A patent/CN106480638A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080199311A1 (en) * | 2007-02-20 | 2008-08-21 | Behr America, Inc. | Blower scroll |
| DE102008041474A1 (en) | 2008-08-22 | 2010-02-25 | BSH Bosch und Siemens Hausgeräte GmbH | Household drying apparatus and method for cleaning a component, in particular an evaporator of a condenser device of such a household drying device |
| DE102012213930A1 (en) | 2012-08-07 | 2014-02-13 | BSH Bosch und Siemens Hausgeräte GmbH | Blower with air inlet nozzle for swirling air flow and air inlet nozzle for a blower |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911425A (en) * | 2020-06-30 | 2020-11-10 | 青岛海尔空调电子有限公司 | Centrifugal fan and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102015216383A1 (en) | 2017-03-02 |
| CN106480638A (en) | 2017-03-08 |
| EP3135803B1 (en) | 2018-04-18 |
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