EP3392396B1 - Trommelwäschetrockner mit raumlufttrocknungsfunktion - Google Patents

Trommelwäschetrockner mit raumlufttrocknungsfunktion Download PDF

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Publication number
EP3392396B1
EP3392396B1 EP18160230.1A EP18160230A EP3392396B1 EP 3392396 B1 EP3392396 B1 EP 3392396B1 EP 18160230 A EP18160230 A EP 18160230A EP 3392396 B1 EP3392396 B1 EP 3392396B1
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EP
European Patent Office
Prior art keywords
dryer
operation mode
room air
drying chamber
air
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.)
Active
Application number
EP18160230.1A
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German (de)
English (en)
French (fr)
Other versions
EP3392396A1 (de
Inventor
Matthias Etterlin
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.)
V-Zug AG
Original Assignee
V-Zug AG
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 V-Zug AG filed Critical V-Zug AG
Priority to SI201830057T priority Critical patent/SI3392396T1/sl
Publication of EP3392396A1 publication Critical patent/EP3392396A1/de
Application granted granted Critical
Publication of EP3392396B1 publication Critical patent/EP3392396B1/de
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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/08—Control circuits or arrangements thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
    • F26B21/028—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow by air valves, movable baffles or nozzle arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/08—Humidity
    • D06F2103/10—Humidity expressed as capacitance or resistance
    • 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
    • D06F2103/32—Temperature
    • 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
    • D06F2103/34—Humidity
    • 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
    • D06F2105/32—Air flow control means
    • 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
    • D06F2105/54—Changing between normal operation mode and special operation modes, e.g. service mode, component cleaning mode or stand-by mode
    • 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
    • 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
    • D06F60/00—Drying not provided for in groups D06F53/00 - D06F59/00

Definitions

  • the invention relates to a dryer with a drying chamber for receiving objects to be dried, a controller, and a heat pump with an evaporator, condenser, throttle and compressor.
  • the dryer further comprises a process air duct for supplying process air dried by means of the heat pump into the drying chamber and for removing process air from the drying chamber in a drying chamber operation.
  • the dryer also has an exhaust air duct for discharging process air dried by means of the heat pump into a room in which the dryer is arranged, and an air supply duct for supplying process air from the room to the heat pump in a room air drying operation.
  • tumble dryers items of clothing are placed in a drum to remove moisture from them.
  • the clothes can be stressed by the drum movements and the strong process air flow.
  • a blower arranged in the room air dryer can also be used to blow the clothes hanging in the room directly with the dry air. Compared to tumble dryers the clothes hanging in the room dry more gently but more slowly.
  • Drum tumble dryers are also known which additionally have a room air drying function.
  • EP 2 684 994 shows a clothes dryer with a drying chamber and a room air drying function.
  • the clothes dryer has a recess area in which a first adapter and a second adapter can be used. With the first adapter, recirculation mode for drying laundry in the drying chamber is guaranteed, while when using the second adapter, the room air can be dried.
  • JP 2007 319458 shows a washer dryer, which comprises a drying chamber operation and a room air drying operation.
  • a controller moves air flaps between a first and a second position to guide the air through the drum in the drying chamber mode and into the room in the room air drying mode.
  • the dryer has at least one switching means that can be controlled by the controller, the controller being designed to switch the dryer between the drying chamber mode and the room air drying mode by controlling the at least one switching device.
  • process air duct exhaust air duct and supply air duct are to be understood functionally.
  • a single duct can simultaneously function as the process air duct and the supply air duct.
  • Switching between drying chamber operation and room air drying operation using the control has the advantage that the handling of the device is more user-friendly.
  • the control can switch the operating mode based on a message from the user or based on a knife value. Switching can also be possible in the absence of the user.
  • Drying chamber operation is advantageously a recirculation mode. This means that the same process air is always dried by the heat pump and blown through the drying chamber, and no process air is released into the room.
  • the throttle can be switched at least between a first flow resistance and a second flow resistance by means of the control.
  • the controller is designed such that the throttle is at least a majority, in particular completely, in the drying chamber mode, the first flow resistance and at least a majority, in particular completely, in the room air drying mode, has the second flow resistance.
  • the throttle can have at least two switchable capillaries or can be an adjustable expansion valve.
  • An adjustable expansion valve means that the flow resistance is adjustable.
  • the choke is a switching device.
  • the dryer can be adapted to the different conditions of the process air in room air drying mode and drying chamber mode.
  • a relatively small volume of process air is available in drying chamber operation.
  • the process air which is heated up by means of the condenser and possibly by means of a further heating element and blown into the drying chamber, cools down relatively little due to the comparatively short distance to the drum outlet and therefore flows through the evaporator at a relatively high temperature.
  • the process air stays in the room air drying operation for a relatively long time, so that the process air flowing through the evaporator has room temperature and is therefore not particularly warm.
  • the different prevailing process air temperatures in the room air drying mode and in the drying chamber mode lead to a different temperature gradient on the evaporator or to changing heat flows and thus influence the operation of the heat pump.
  • the intention is to completely evaporate the refrigerant using the heat supplied to the evaporator and to heat it slightly above the evaporation temperature. So that these conditions can be achieved despite the different process air properties in the two operating modes, different flow resistances are set on the throttle depending on the operating mode.
  • the dryer advantageously has at least one flow switch for directing the process air, which can be switched at least between a first switching position and a second switching position by means of the control.
  • the flow switch is at least mostly switched in the first switching position during drying chamber operation and at least mostly in the second switching position during room air drying operation.
  • all flow switches arranged in the dryer can be switched over by means of the control.
  • the flow switch is a switching device.
  • the process air follows a different flow path during the room air drying operation and during the drying chamber operation.
  • the drying chamber mode is, for example, a recirculation mode
  • the process air does not leave the dryer, while in the room air drying mode, new air is always drawn in from the room and discharged to the room.
  • the controller changes the flow switches so that the process air flows according to the operating mode. In this way, the user does not have to operate any flow flaps when switching the operating mode, but the control can make the switching automatically.
  • drying chamber operation can be interrupted and switched over to room air drying operation as soon as the room air humidity is too high. This lowers the air humidity in the room so that mold growth in the room can be prevented, for example.
  • the room air drying operation can be carried out in a first step, after which it is switched over to the drying chamber operation.
  • the degree of moisture of the objects to be dried can be determined, for example, by measuring the electrical conductivity of the objects to be dried or by measuring the air humidity of the process air in the drying chamber or after exiting the drying chamber.
  • control is designed in such a way that a movement of the drying chamber, in particular a drum movement, is stopped or reduced when the drying chamber operation is ended and when switching to the room air drying operation.
  • a room humidity can advantageously be monitored, so that if a certain room humidity threshold value is exceeded, the dryer temporarily switches to room air drying operation and then continues drying chamber operation later.
  • At least one flow switch is switched when switching from drying chamber operation to room air drying operation.
  • a flow switch is arranged in such a way that a process air flow through the drying chamber can be prevented, and / or is arranged in the flow direction immediately before or after an inlet into the drying chamber and / or immediately at a dryer air inlet and / or directly at a dryer air outlet.
  • Via the dryer air inlet process air from the room is fed to the dryer and process air is discharged from the dryer into the room via the dryer air outlet.
  • the fact that the flow switch is arranged "immediately" in front of the inlet means that no other components are arranged between the flow switch and the inlet, apart from the flow channel itself.
  • the dryer advantageously has a main filter for cleaning the process air, the main filter being arranged and designed in such a way that the process air flows through it both in the drying chamber mode and in the room air drying mode and both in the drying chamber mode and in the room air drying mode upstream of the evaporator and is arranged in front of the capacitor.
  • this arrangement has the advantage that only a single main filter is required in order to be able to filter the process air in both operating modes.
  • the main filter is arranged upstream of the evaporator and upstream of the condenser in both operating modes. This prevents contamination of these two components.
  • room air drying mode this means that the process air entering the dryer from the room is filtered before it flows through the evaporator and the condenser.
  • drying chamber operation the process air in the drying chamber is contaminated, in particular by the intake of lint.
  • the main filter is thus arranged in such a way that the process air in drying chamber operation is filtered first after exiting the drying chamber before it flows through the evaporator and condenser.
  • control is designed such that the room air drying operation can be switched off or not switched on by the control as soon as a process air temperature or process air humidity or a temperature of the refrigerant or a pressure of the refrigerant measured by means of a measuring device Threshold reached, in particular fell below.
  • the measuring device is arranged and designed in such a way that the process air temperature can be measured in the flow direction upstream of the evaporator and / or in the evaporator.
  • the threshold value is determined in such a way that icing of the evaporator can be prevented or a predetermined maximum ice thickness on the evaporator remains below.
  • the evaporator can freeze up relatively quickly.
  • the drying process is monitored, for example by measuring the temperature or humidity of the process air or the temperature or pressure of the refrigerant.
  • the control system decides on the (continued) operation or initiation of the evaporator defrost.
  • a dryer according to the invention is shown schematically. It has an outer housing 1 with a front side 2a and with a rear side 2b.
  • the dryer further comprises a drying chamber 3, process air channels 3a, means 3b for measuring the degree of moisture in the laundry to be dried, a heat pump with an evaporator 4, a condenser 5, a compressor 6 and a throttle 7.
  • the process air is conveyed by means of a blower 8, steered in the desired flow directions by means of flow switches 9, 10, 11 and filtered by means of the main filter 12.
  • the flow switches 9, 10, 11 are switched via the control 13 and are designed as shut-off valves.
  • Objects to be dried, in particular clothes can be dried with the dryer both in the drying chamber 3, which can be designed as a drum, and in the room in which the dryer is arranged.
  • the dryer has two different operating modes, a drying chamber operation and a room air drying operation. These are now based on the Fig. 1 described in detail.
  • Drying chamber operation is a recirculation mode.
  • the process air flows through the drying chamber 3 several times in a circuit and is not exchanged with the surroundings.
  • the process air emerging from the drying chamber 3 flows through the main filter 12 and is in particular freed of fluff.
  • the process air then flows through the evaporator 4 and is thereby cooled and dehumidified.
  • the dried process air is heated again at the condenser 5 and returns to the drying chamber 3 Drying chamber operation, the flow switches 9 and 10 are closed and the flow switch 11 is open.
  • the flow switches 9 and 10 are open, while the flow switch 11 is closed. Air is drawn in from the room and reaches the dryer via the dryer air inlet 14 and the supply air duct 15. The air flows through the main filter 12, the evaporator 4, the condenser 5 and flows back into the room via the exhaust air duct 16 and the dryer air outlet 17.
  • a tumble dryer of this type is characterized by various properties, which are described in more detail below.
  • the dryer air inlet 14 and the dryer air outlet 17 are arranged on the front side 2a. This makes air exchange with the room particularly easy. In particular, the exiting process air can be blown directly onto the items of clothing hung in the room.
  • the dryer air inlet 14 and the dryer air outlet 17 are spaced as far apart as possible on the front side 2a, so that the dry air emerging through the dryer air outlet 17 does not immediately re-enter the dryer through the dryer air inlet 14. This prevents a short circuit in the process air.
  • the dryer air inlet 14 is arranged relatively close to the evaporator 4. As a result, the process air in the room air drying mode between the dryer air inlet 14 and the evaporator 4 heats up only very slightly due to the operating heat of the dryer, so that the process air does not have to be cooled unnecessarily by the evaporator 4.
  • the throttle 7 is designed as a switchable throttle. For this purpose, it has two parallel, different length capillaries 7a and 7b. The longer capillary 7a has a greater flow resistance than the shorter capillary 7b. About one Three-way valve 7c, which is controlled by the controller 13, the throttle 7 can be switched.
  • the process air In indoor air operation, the process air is at room temperature, i.e. it flows through the evaporator 4 at a low temperature. In the drying chamber mode, the process air flows from the drying chamber 3 directly to the evaporator 4 and is still warm.
  • the throttle 7 By switching the throttle 7, the refrigerant circuit can be adapted to the different prevailing process air temperatures on the evaporator 4 and thus to the different prevailing temperature gradients. In both cases, for efficient operation of the heat pump, the intention is that the refrigerant on the evaporator 4 is completely evaporated and warmed up slightly above the evaporation temperature.
  • the main filter 12 is arranged in the flow direction immediately upstream of the evaporator 4 and upstream of the condenser 5. As a result, the evaporator 4 and the condenser 5 are not or only slightly contaminated by the process air.
  • the main filter 12 is arranged such that the process air first flows through the main filter 12 both in drying chamber operation and in room air drying operation before the process air flows past the evaporator 4 and the condenser 5.
  • the same main filter 12 can be used in both operating modes.
  • the process air humidity can be measured with the measuring device 18. If the dryer is in the drying chamber mode, for example, and the process air humidity drops below a certain threshold value, the drying chamber mode can be switched off or the room air drying mode can be switched over.
  • process air temperature and / or the process air humidity can also be measured with the measuring device 18. If the process air temperature and / or the process air humidity falls below a certain threshold value, for example, during room air drying operation, the room air drying operation is switched off so that the evaporator does not ice up or the ice that has formed on the evaporator can be defrosted.
  • the dryer air inlet 14 is arranged on the rear 2b of the dryer and the dryer air outlet 17 is arranged on the front 2a.
  • the dryer air inlet 14 and the dryer air outlet 17 are spaced even further apart, so that as far as possible no process air escaping into the room through the dryer air outlet 17 immediately gets back into the dryer through the dryer air inlet 14.
  • the flow switches 9 and 10 are open and the flow switch 11 is closed.
  • the flow switches 9 and 10 are closed and the flow switch 11 is open.
  • the process air flow thus flows through drying chamber 3 both in drying chamber operation and in room air drying operation.
  • the device adjustments required in comparison with a dryer without a room air drying function are minor, because the entire flow path between the entry into drying chamber 3 and blower 8 is identical in both operating modes ,
  • the dryer air inlet 14 are arranged on the front side 2a and the dryer air outlet 17 on the rear side 2b. Like in the Execution after Fig. 2 the dryer air inlet 14 and the dryer air outlet 17 are spaced as far apart as possible. Compared to the execution after Fig. 2 there is an advantage in that the process air entering the dryer through the dryer air inlet 14 is immediately led through the evaporator 4 and does not heat up too much in front of the evaporator 4 due to the operating heat of the dryer.
  • FIG. 4 A dryer is shown in which the dryer air inlet 14, the dryer air outlet 17 and the flow switches 9 and 10 are arranged relatively close to one another. This arrangement is intended to ensure that only the flow switches 9 and 10 have to be actuated when switching between room air drying operation and drying chamber operation with respect to the control of the process air flow.
  • the flow switches 9 and 10 arranged close to one another can preferably be actuated via a common mechanism.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP18160230.1A 2017-04-06 2018-03-06 Trommelwäschetrockner mit raumlufttrocknungsfunktion Active EP3392396B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201830057T SI3392396T1 (sl) 2017-04-06 2018-03-06 Bobenski sušilnik perila s funkcijo sušenja okoliškega zraka

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00468/17A CH711885B1 (de) 2017-04-06 2017-04-06 Trockner, insbesondere Trommeltrockner mit Raumlufttrocknungsfunktion.

Publications (2)

Publication Number Publication Date
EP3392396A1 EP3392396A1 (de) 2018-10-24
EP3392396B1 true EP3392396B1 (de) 2020-02-26

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ID=59030680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18160230.1A Active EP3392396B1 (de) 2017-04-06 2018-03-06 Trommelwäschetrockner mit raumlufttrocknungsfunktion

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EP (1) EP3392396B1 (sl)
CH (1) CH711885B1 (sl)
SI (1) SI3392396T1 (sl)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4166709A4 (en) * 2020-11-20 2023-12-27 Samsung Electronics Co., Ltd. DRYER AND METHOD FOR CONTROLLING SAME
CN116368273A (zh) * 2020-11-20 2023-06-30 三星电子株式会社 干衣机及其控制方法
US20220356635A1 (en) * 2021-05-06 2022-11-10 Haier Us Appliance Solutions, Inc. Ambient air dehumidification system for a condenser or heat pump laundry appliance
CN113338013B (zh) * 2021-06-24 2022-09-02 海信冰箱有限公司 干衣机的控制方法、装置以及干衣机

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007319458A (ja) * 2006-06-01 2007-12-13 Matsushita Electric Ind Co Ltd 洗濯乾燥機
DE102012212162A1 (de) * 2012-07-11 2014-01-16 BSH Bosch und Siemens Hausgeräte GmbH Trockner mit Wärmepumpe mit zusätzlicher Eignung für eine Raumentfeuchtung sowie Verfahren zu dessen Betrieb

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CH711885A2 (de) 2017-06-15
CH711885B1 (de) 2021-05-14
SI3392396T1 (sl) 2020-07-31
EP3392396A1 (de) 2018-10-24

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