EP2690212B1 - Verfahren zur steuerung eines wäschetrockners mit wärmepumpensystem und mit einem derartigen verfahren gesteuerter wäschetrockner - Google Patents

Verfahren zur steuerung eines wäschetrockners mit wärmepumpensystem und mit einem derartigen verfahren gesteuerter wäschetrockner Download PDF

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Publication number
EP2690212B1
EP2690212B1 EP12177506.8A EP12177506A EP2690212B1 EP 2690212 B1 EP2690212 B1 EP 2690212B1 EP 12177506 A EP12177506 A EP 12177506A EP 2690212 B1 EP2690212 B1 EP 2690212B1
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EP
European Patent Office
Prior art keywords
drying machine
laundry drying
process air
condenser
compressor
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.)
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Application number
EP12177506.8A
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English (en)
French (fr)
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EP2690212A1 (de
Inventor
Jurij Paderno
Moeed Mukhtar
James Carow
Paolo Spranzi
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.)
Whirlpool Corp
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Whirlpool Corp
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Publication date
Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Priority to EP12177506.8A priority Critical patent/EP2690212B1/de
Priority to PL12177506T priority patent/PL2690212T3/pl
Priority to US13/795,675 priority patent/US20140020260A1/en
Publication of EP2690212A1 publication Critical patent/EP2690212A1/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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/20—Operation modes, e.g. delicate laundry washing programs, service modes or refreshment cycles
    • 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
    • D06F2103/50—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to heat pumps, e.g. pressure or flow rate
    • 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
    • D06F2105/26—Heat pumps
    • 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
    • D06F2105/28—Electric heating
    • 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
    • D06F2105/30—Blowers
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements

Definitions

  • the present invention relates to a method for controlling a laundry drying machine with heat pump system comprising a process air circuit including a rotating drum, a blower and a heater, a refrigerant circuit including a compressor, a condenser, an expansion device, an evaporator, such condenser and evaporator being in heat exchange relationship with the process air circuit, and an auxiliary condenser cooled by an air flow driven by a fan, and at least two temperature sensors placed respectively in the process air circuit and in the refrigerant circuit.
  • hybrid heat pump dryers in which the process air is heated either by the condenser of the refrigerant circuit and by an auxiliary heater are well known in the art.
  • an hybrid heat pump dryer having an auxiliary condenser with an auxiliary fan (cooled by ambient air) is known from EP 999302 .
  • a similar hybrid heat pump dryer is disclosed by EP 2034084 A1 .
  • An example of a heat pump dryer without an auxiliary heat exchanger is disclosed by US 2010/0077787 A1 where, in order to prevent frost in the evaporator during a energy saving dry operation, the compression ratio of the compressor is reduced.
  • hybrid heat pump dryers despite being very efficient in term of use of energy, do offer to the user a quite limited range of choices of the drying process, for instance degree of final humidity content of laundry or long or short drying cycle. Such few and simple choices can on one side limit the operational ranges of the machine, and on the other side limit the possible choices of the users which may depend on several factors.
  • the purpose of the invention is therefore a goal oriented control method, which increases the possible choices of the user, and which can particularly optimizes a choice on low energy consumption, on cycle overall time or on fabric care of a hybrid heat pump household tumble dryer, with an optimized balance between heating and cooling power.
  • the process air circuit is the one that involves the evaporation of the water retained by the fabric and it is made up of a rotating drum 10 actuated by an electric motor and containing a certain amount of clothes, a process air blower 12that sets the circuit process airflow, a condenser 14 and an heating element 16 that heat the air going inside the drum 10, an evaporator 18 where the moisture contained in the process air can condense, an auxiliary condenser 20 (sub-cooler), a compressor 22, an expansion tube 23 and a fan 26 for cooling the auxiliary condenser 20 with ambient air.
  • the clothes dryer comprises also a NTC temperature sensor T1 placed on the process air exhaust from the drum and a NTC sensor T2 placed in the refrigerant circuit downstream the compressor 22, such temperature sensor being connected to a control process unit 28 which drivers all components of the machine according to a certain process.
  • the machine can also include also other components, e.g. an accumulator upstream the compressor 22,which is not shown in figure 1 for sake of clarity.
  • other components e.g. an accumulator upstream the compressor 22,which is not shown in figure 1 for sake of clarity.
  • An air channel conveys the process air to the evaporator, where the vapor contained in the air thanks to the low temperature condense.
  • the heat pump circuit is the one that involves the refrigerant that with its phase variation transfer heat to the air circuit.
  • the temperature sensor T2 that measures the refrigerant temperature may be placed in a position different from compressor outlet, for instance in the capillary tube or other places.
  • the auxiliary fan 26 increases the heat exchange on the auxiliary condenser 20.
  • temperature sensor T1 may be placed in a different position than the one shown in figure 1 , but in any case it is placed in the moist air circuit, by the drum outlet or the blower or the evaporator.
  • the second temperature sensor T2 instead of being placed in the refrigerant circuit, may be placed in the moist air circuit in a position different to the first sensor T1, for instance by the heater 16 or the condenser 14 or the auxiliary condenser 20.
  • controllable variables of the system which may be continuously adjusted or simply ON/OFF, are the compressor speed, the process air blower speed, the heating element power and the auxiliary fan speed.
  • the motors of the compressor 22 and the process air blower 12 are constants speed motors, therefore it is not possible to change their speed.
  • the compressor 22 is kept on for the entire drying cycle while the heater 16 switches on/off in order to manage the temperature of the tumble dryer by feeding back the drum exhaust temperature measured by sensor T1.
  • the drum output temperature is usually a good approximation of the clothes temperature which is therefore kept under control.
  • the feedback is usually made trough hysteresis control, i.e. the heater 16 and the auxiliary fan 26 are switched on when the feedback temperature is below a predefined threshold and switched off when it is above a second predefined threshold.
  • the method according to the invention can control every component of the appliance, and preferably both the auxiliary cooling fan 26 and the heater 16 of a tumble hybrid heat pump dryer, optimizing alternatively energy consumption, drying time or fabric care according to a selection done by the user by means of a user interface 30. This selection can be done through a button, touch display, cycle selection, etc...
  • the system temperatures can be controlled by means of several actuators: the auxiliary cooling fan 26, the heater 16, the compressor 22 and the process air blower 12.
  • the way all these actuators are used affects the overall system performances in terms of energy consumption, cycle duration, water extraction efficiency, final moisture retention at the end of the cycle, fabric care (wrinkles, shrinkage, etc%), etc.
  • the present invention deals therefore with a method of choosing how to use these actuators in the different parts of a drying cycle.
  • the invention is effective even in the case of one or more of the actuators cannot be continuously controlled, e.g. fixed speed compressor, fixed speed fan, etc.
  • the drying cycle is conceptually divided in three phases of variable duration: warm up (WU), mid phase (MP) and cool down (CD).
  • WU warm up
  • MP mid phase
  • CD cool down
  • the averages are computed taking in account 0 as OFF and 1 as ON.
  • the proposed controller will be provided with the possibility to choose via UI between at least two of the following cycles, to which the following values of parameters apply:
  • FIG. 2 A conceptual scheme of which is shown in figure 2 , dealing with changing both auxiliary fan motor speed and heating power according to two temperature measurements by sensors T1 and T2, thus controlling the energy delivered to the load inside the drum and the energy removed from the refrigerant giving the possibility to optimize different system performance objective.
  • the temperature sensed by sensor T1 is the drum outlet temperature while the temperature sensed by sensor T2 is the capillary temperature of the refrigerant circuit.
  • the control strategy according to the invention has been compared with a simple known strategy in which the hysteresis on T1 controls the heater actuation while the hysteresis on T2 controls the fan actuation, as shown in Figure 6 , referred to a drying cycle of a 4 kg load.
  • FIG 7 shows an energy consumption equal to 1,69 kWh and a drying time around 92 minutes.
  • A it is indicated the temperature of process air entering the drum 10, with B the temperature of air measured at the exhaust of the drum, with C the capillary temperature of the refrigerant circuit and with D the residual moisture content of the fabric inside the drum.
  • the time optimized cycle in Figure 9 has comparable energy consumption 1,72 kWh (+2 %) and a comparable drying time, around 90 minutes (-1 %).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Claims (6)

  1. Ein Verfahren zum Steuern einer Wäschetrockenmaschine mit einem Wärmepumpesystem umfassend einen Prozessluftkreislauf umfassend eine Rotationstrommel (10), einen Bläser (12) und einen Erhitzer (16), einen Kühlmittelkreislauf umfassend einen Kompressor (22), einen Kondensator (14), eine Expansionsvorrichtung (23), einen Verdampfer (18), solch ein Kondensator und Verdampfer in Wärmeaustauschbeziehung mit dem Prozessluftkreislauf seiend, einem Hilfskondensator (20), gekühlt durch einen Luftzug, angetrieben durch einen Ventilator (26), und zumindest zwei Temperatursensoren (T1, T2), platziert in dem Prozessluftkreislauf und / oder in dem Kühlmittelkreislauf, dadurch gekennzeichnet, dass das Verfahren umfasst zuführend ein gewünschtes Verhalten von der Wäschetrockenmaschine ausgewählt aus der Gruppe bestehend aus optimierter Verwendung von Energie, Gesamttrockenzeit und Stofffürsorge, und Steuern von den Komponenten (12, 16, 22, 26) von der Maschine gemäß zu Signalen von besagten zwei Temperatursensoren (T1, T2) und gemäß von besagten gewünschten Verhalten, um die zu der Ladung im Inneren von der Trommel gelieferte Energie und die entzogene Energie von dem Kühlmittel zu steuern, um die unterschiedlichen Systemleistungsziele zu optimieren.
  2. Ein Verfahren gemäß zu Anspruch 1, wobei zumindest zwei Komponenten gesteuert werden.
  3. Ein Verfahren gemäß zu Anspruch 2, wobei die zumindest zwei zu steuernden Komponenten ausgewählt sind aus der Gruppe bestehend aus einem Bläser (12), Erhitzer (16), einem Kompressor (22) und einem Ventilator (26).
  4. Wäschetrockenmaschine mit Wärmepumpesystem umfassend einen Prozessluftkreislauf umfassend eine Rotationstrommel (10), einen Bläser (12) und einen Erhitzer (16), einen Kühlmittelkreislauf umfassend einen Kompressor (22), einen Kondensator (14), eine Expansionsvorrichtung (23), einen Verdampfer (18), solch ein Kondensator und Verdampfer in Wärmeaustauschbeziehung mit dem Prozessluftkreislauf seiend, einem Hilfskondensator (20), gekühlt durch einen Luftzug, angetrieben durch einen Ventilator (26), und zumindest zwei Temperatursensoren (T1, T2), platziert in dem Prozessluftkreislauf und / oder in dem Kühlmittelkreislauf, dadurch gekennzeichnet, dass es umfasst eine Benutzerschnittstelle (30), adaptiert für das Auswählen von einem gewünschten Verhalten von der Wäschetrockenmaschine ausgewählt aus der Gruppe bestehend aus optimierter Verwendung von Energie, Gesamttrockenzeit und Stofffürsorge, und einer Steuereinheit (28) assoziiert zu solch einer Benutzerschnittstelle (30) und adaptiert die Komponenten (12, 16, 22, 26) von der Maschine zu steuern gemäß den Signalen von besagten zwei Temperatursensoren (T1, T2) und gemäß zu besagten gewünschten Verhalten, um die zu der Ladung im Inneren von der Trommel gelieferte Energie und die entzogene Energie von dem Kühlmittel zu steuern, um die unterschiedlichen Systemleistungsziele zu optimieren.
  5. Wäschetrockenmaschine gemäß Anspruch 4, wobei die zumindest zwei Komponenten adaptiert sind, um gesteuert zu werden.
  6. Wäschetrockenmaschine gemäß Anspruch 5, wobei die zumindest zwei zu steuernden Komponenten ausgewählt sind aus der Gruppe bestehend aus einem Bläser (12), einem Erhitzer (16), einem Kompressor (22) und einem Ventilator (26).
EP12177506.8A 2012-07-23 2012-07-23 Verfahren zur steuerung eines wäschetrockners mit wärmepumpensystem und mit einem derartigen verfahren gesteuerter wäschetrockner Active EP2690212B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12177506.8A EP2690212B1 (de) 2012-07-23 2012-07-23 Verfahren zur steuerung eines wäschetrockners mit wärmepumpensystem und mit einem derartigen verfahren gesteuerter wäschetrockner
PL12177506T PL2690212T3 (pl) 2012-07-23 2012-07-23 Sposób sterowania suszarką do pranej bielizny z systemem pompy ciepła i suszarka do pranej bielizny sterowana takim sposobem
US13/795,675 US20140020260A1 (en) 2012-07-23 2013-03-12 Method for controlling a laundry drying machine with heat pump system and laundry drying machine controlled by such method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12177506.8A EP2690212B1 (de) 2012-07-23 2012-07-23 Verfahren zur steuerung eines wäschetrockners mit wärmepumpensystem und mit einem derartigen verfahren gesteuerter wäschetrockner

Publications (2)

Publication Number Publication Date
EP2690212A1 EP2690212A1 (de) 2014-01-29
EP2690212B1 true EP2690212B1 (de) 2016-11-09

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US (1) US20140020260A1 (de)
EP (1) EP2690212B1 (de)
PL (1) PL2690212T3 (de)

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US9562707B2 (en) 2013-03-14 2017-02-07 Whirlpool Corporation Refrigerator cooling system having a secondary cooling loop
KR102127383B1 (ko) * 2013-08-01 2020-06-26 엘지전자 주식회사 의류처리장치
US20160298283A1 (en) * 2013-11-29 2016-10-13 Arcelik Anonim Sirketi Laundry treatment appliance with a compressor cooling line in parallel with processing air line
CN103981681A (zh) * 2014-05-20 2014-08-13 胡家萍 一种双冷凝器封闭式干衣柜
WO2016004349A1 (en) * 2014-07-02 2016-01-07 Ricotta Gesualdo Evaporator and methods of using same
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JP6193841B2 (ja) * 2014-12-10 2017-09-06 住友ゴム工業株式会社 タイヤ用ゴム組成物、及び空気入りタイヤ
WO2016138920A1 (en) * 2015-03-02 2016-09-09 Arcelik Anonim Sirketi Heat pump type laundry dryer and method for controlling the same
WO2017005528A1 (en) * 2015-07-08 2017-01-12 Arcelik Anonim Sirketi A heat pump laundry dryer comprising a heater
KR102585025B1 (ko) 2016-01-05 2023-10-05 엘지전자 주식회사 히트펌프 모듈을 구비하는 의류처리장치
US10633785B2 (en) 2016-08-10 2020-04-28 Whirlpool Corporation Maintenance free dryer having multiple self-cleaning lint filters
KR102658780B1 (ko) * 2016-09-21 2024-04-19 엘지전자 주식회사 건조기의 제어 방법
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CN106802574B (zh) * 2017-03-28 2021-04-06 北京小米移动软件有限公司 衣物晾晒方法和装置
US10514194B2 (en) 2017-06-01 2019-12-24 Whirlpool Corporation Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators
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US20140020260A1 (en) 2014-01-23
PL2690212T3 (pl) 2017-04-28
EP2690212A1 (de) 2014-01-29

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