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EP3090091B1 - Procédé de fonctionnement d'un appareil électroménager pour sécher le linge - Google Patents

Procédé de fonctionnement d'un appareil électroménager pour sécher le linge Download PDF

Info

Publication number
EP3090091B1
EP3090091B1 EP14830656.6A EP14830656A EP3090091B1 EP 3090091 B1 EP3090091 B1 EP 3090091B1 EP 14830656 A EP14830656 A EP 14830656A EP 3090091 B1 EP3090091 B1 EP 3090091B1
Authority
EP
European Patent Office
Prior art keywords
evaporator
working fluid
drying
branch
condenser
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
EP14830656.6A
Other languages
German (de)
English (en)
Other versions
EP3090091A1 (fr
Inventor
Luca Bossi
Aldo Liberatore
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 EMEA SpA
Original Assignee
Whirlpool EMEA SpA
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 Whirlpool EMEA SpA filed Critical Whirlpool EMEA SpA
Publication of EP3090091A1 publication Critical patent/EP3090091A1/fr
Application granted granted Critical
Publication of EP3090091B1 publication Critical patent/EP3090091B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target 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
    • 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
    • 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
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements

Definitions

  • the object of the present invention is a household appliance for drying laundry.
  • a drier with a heat pump equipped with a condenser and an evaporator is known.
  • This type of drier comprises a drying compartment in which a rotating drum is located and the drying air is taken from the compartment and treated by the heat pump prior to being re-introduced therein.
  • the evaporator of the heat pump allows for condensation of the moisture present in the air taken from the washing compartment (this is accompanied by the evaporation of a working fluid that circulates in the heat pump).
  • the condenser of the heat pump brings about the heating of the air extracted from the compartment and previously dehumidified (this is accompanied by the condensation of the working fluid that circulates in the heat pump).
  • the air extracted from the drying compartment can be re-directed back towards the laundry items to be dried.
  • the working fluid circulating in the heat pump downstream of the evaporator and upstream of the condenser undergoes an increase in pressure in a compressor.
  • variable speed compressor The use of a variable speed compressor is known for the best adaptation of the operation of the heat pump to various operating modes.
  • a compressor such as this makes it possible for example to increase the rotation speed so as to reduce the initial transient.
  • the compressor makes it possible to reduce the rotation speed in a final step of the drying cycle or when operating the drier with a small load of laundry in the drum (thus allowing for lower energy consumption on the part of the compressor).
  • Document DE10255575C1 discloses a tumble dryer with a heat pump assembly, wherein the evaporator in the refrigerant circuit includes two parallel heat exchange surfaces, with separate regulation of the cooling medium flow fed to each.
  • Document EP2551401A1 discloses a heat pump system for a tumble dryer, wherein a compressor, a first heat exchanger provided for cooling down the refrigerant, lamination means, a second heat exchanger and a third heat exchanger provided both for heating up the refrigerant form a loop in the refrigerant circuit and wherein an outlet of the third heat exchanger is connected to an intermediate inlet of the compressor.
  • Document EP2489775A1 discloses a tumble dryer with a heat pump system, wherein the refrigerant circuit includes an additional evaporator arranged parallel to the main evaporator, wherein the additional evaporator is switchable connected to the refrigerant circuit so that the refrigerant passes either the main evaporator or the additional evaporator.
  • Document EP2565322A2 discloses a control method of a tumble dryer equipped with a variable speed compressor, wherein the electrical power supplied to the compressor are controlled according to the operating conditions of the tumble dryer.
  • the technical task underlying the present invention is to overcome the above-mentioned drawbacks and to make available a household appliance that makes it possible to optimize the operation of the drying cycle.
  • FIG. 1 shows a schematic view of a household appliance according to the present invention.
  • a household appliance for drying laundry is indicated by the reference number 1.
  • This household appliance 1 can be a washer-drier or a drier, for example.
  • the household appliance 1 comprises:
  • the heat pump 4 comprises a circuit 40 in which the working fluid circulates.
  • This circuit 40 comprises a condenser 44 for condensing the working fluid, said condenser 44 interacting with the drying air flowing in said line 3.
  • the circuit 40 comprises a first and a second evaporator 41, 42 for evaporating the working fluid in thermal contact with the drying air flowing in said line 3; following the direction of flow of the drying air along said line 3, the condenser 44 is downstream of the first and the second evaporator 41, 42.
  • the first and/or the second evaporator 41, 42 determine(s) the condensation of the moisture present in the drying air.
  • the condenser 44 allows for heating the drying air previously dehumidified by the first and/or second evaporator 41, 42. This heating process takes place prior to the re-introduction of the heating air in the compartment 20.
  • a movement means 6 for moving the drying air along the line 3 is conveniently located along the line 3.
  • the circuit 40 further comprises a working fluid conduit 43 that comprises a zone 430 in which it divides into a first and a second branch 431, 432 comprising a first and a second thermal expansion member 61, 62, respectively.
  • the first branch 431 passes through said first evaporator 41 and the second branch 432 passes through said second evaporator 42.
  • the zone 430 in which the conduit 43 divides is downstream of the condenser 44 and upstream of the first and the second evaporator 41, 42 according to the direction of flow of the working fluid.
  • the first and the second evaporator 41, 42 are arranged in parallel.
  • the circuit 40 further comprises a compressor 46 for compressing the working fluid.
  • the compressor 46 is located downstream of the first and the second evaporator 41, 42 and upstream of the condenser 44 along the direction of flow of the working fluid. Conveniently, the compressor 46 is a fixed speed compressor.
  • the circuit 40 further comprises control means 45 for controlling the supply of working fluid coming from the first and the second branch 431, 432 in said compressor 46.
  • the control means 45 comprises a valve 451 in which the first and the second branch 431, 432 merge.
  • the valve 451 is located in a zone 433 that reconnects the first and the second branch 431, 432.
  • This valve 451 can conveniently take on at least one configuration in which it enables the passage of the working fluid coming only from the first branch 431.
  • the valve 451 can take on a configuration in which it enables the passage of the working fluid coming only from the second branch 432.
  • the valve 451 can take on a configuration in which it enables the passage of the working fluid coming from both the first branch and the second branch 431,432.
  • the valve 451 can conveniently take on a configuration in which it prevents the passage of the working fluid from both the first and the second branch 431, 432.
  • This valve 451 conveniently comprises a casing.
  • the casing is conveniently provided with openings for connection with the first branch 431, the second branch 432 and the compressor 46.
  • a shutter provided with at least one through cavity is present in the casing. Depending on the orientation of the shutter within the casing, this cavity sets the zones upstream and downstream of the valve 451 in fluid communication. 451.
  • This cavity can also have branches, for example for setting a number of input zones upstream of the valve 451 in fluid communication with a single output zone downstream of the valve 451.
  • valve 451 is a three-way ball valve.
  • the first and the second thermal expansion members 61, 62 are capillaries that define a reduction of the section for passage of the first and the second branch 431, 432.
  • the first and/or the second thermal expansion member 61, 62 define(s) a reduction of the passage section.
  • the first thermal expansion member 61 is in series with the first evaporator 41
  • the second thermal expansion member 62 is in series with the second evaporator 42.
  • the first thermal expansion member 61 has different geometric characteristics with respect to said second thermal expansion member 62. In this manner, a different head loss is obtained.
  • the first evaporator 41 and the second evaporator 42 have different heat exchange capacities. This allows for even more versatile operation of the household appliance 1.
  • control means 45 comprises an electronic control unit that automatically commands the valve 451 based on pre-established parameters.
  • an object of the present invention is also a method of operation of a household appliance 1 having one or more of the characteristics indicated hereinabove.
  • the method conveniently comprises the steps of:
  • the method further comprises having said fluid flow only in the first or in the second evaporator 41, 42 should said value (of the weight of the laundry) fall short of the pre-established threshold.
  • the command for having the working fluid flow in both the first and the second evaporator 41, 42, or only in the first or the second evaporator 41, 42, is given by said electronic unit based on pre-established parameters.
  • the steps described above are slightly modified as follows: if the value of the weight of the laundry (either measured or estimated by means of algorithms) exceeds said threshold, the working fluid will be allowed to flow only in the first evaporator 41; if the value falls short of the threshold, the working fluid will be allowed to flow only in the second evaporator 42. Passage into the first evaporator 41 corresponds to passage in the first branch 431 and passage into the second evaporator 42 corresponds to passage in the second branch 432.
  • An object of the present invention is a method of operation of the household appliance 1 that comprises the step of having the fluid flow only in the first evaporator 41 in the case in which a user selects a command that signals the presence of a small load in the drum 2 to the household appliance 1.
  • An object of the present invention is also a method of operation of a household appliance comprising the steps of:
  • the drying air is at ambient temperature and the maximum flow rate of the working fluid may be necessary to facilitate the process of heating the same air in the condenser 44.
  • the invention makes it possible to achieve multiple advantages.
  • valve 451 makes it possible to modulate dehumidification capacity, without the use of a variable speed compressor.
  • a variable speed compressor entails high costs, for installation and for maintenance.
  • the present invention thus makes it possible to regulate the cooling capacity of the heat pump based on the load and/or the program selected.
  • the positioning of the valve 451 downstream of the first and second thermal expansion member 61, 62 makes it possible to position the valve 451 in a low-pressure zone; as a result, the seals and geometry of the valve 451 will be such as to resist lower pressures (and therefore this component entails lower costs).
  • the valve 451 offers a greater degree of reliability.

Landscapes

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

Claims (1)

  1. Procédé de fonctionnement d'un appareil ménager (1) pour sécher du linge, l'appareil ménager (1) comprenant :
    - un tambour rotatif (2) conçu pour loger le linge à sécher;
    - un compartiment de séchage (20), dans lequel le tambour (2) est situé;
    - une conduite (3) pour retirer de l'air de séchage dudit compartiment (20) et réintroduire le même air dans le compartiment (20) ;
    - une pompe à chaleur (4) pour traiter l'air de séchage, ladite pompe à chaleur (4) comprenant un circuit (40) dans lequel un fluide de travail circule, ledit circuit (40), à son tour, comprenant :
    i) un condenseur (44) pour condenser le fluide de travail, ledit condenseur (44) interagissant avec l'air de séchage s'écoulant dans ladite conduite (3) ;
    ii) des premier et second évaporateurs (41, 42) du fluide de travail en contact thermique avec l'air de séchage s'écoulant dans ladite conduite (3) ; en suivant la direction d'écoulement de l'air de séchage le long de ladite conduite (3), le condenseur (44) étant situé en aval des premier et second évaporateurs (41,42) ;
    (iii) un conduit de fluide de travail (43) qui comprend une zone (430) dans laquelle il se divise en des première et seconde branches (431, 432) comprenant des premier et second éléments de dilatation thermique (61, 62), respectivement, ladite première branche (431) passant à travers ledit premier évaporateur (41), ladite seconde branche (432) passant à travers ledit second évaporateur (42) ; ladite zone (430) dans laquelle le conduit (43) se divise étant située en aval du condenseur (44) et en amont des premier et second évaporateurs (41, 42) selon la direction d'écoulement du fluide de travail ;
    (iv) un compresseur (46) pour comprimer le fluide de travail, ledit compresseur (46) étant situé en aval des premier et second évaporateurs (41, 42) et en amont du condenseur (44) le long de la direction d'écoulement du fluide de travail ;
    (v) des moyens de commande (45) pour commander l'alimentation en fluide de travail venant des première et seconde branches (431, 432) dans ledit compresseur (46),
    caractérisé en ce qu'il comprend les étapes consistant à :
    A) déterminer une valeur du poids du linge à sécher qui a été placé dans le tambour (2) ;
    B) avoir ledit écoulement de fluide de travail dans à la fois les premier et second évaporateurs (41, 42) au cas où ladite valeur dépasse un seuil préétabli.
EP14830656.6A 2013-12-30 2014-12-15 Procédé de fonctionnement d'un appareil électroménager pour sécher le linge Active EP3090091B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000106A ITPR20130106A1 (it) 2013-12-30 2013-12-30 Elettrodomestico di asciugatura panni.
PCT/IB2014/066918 WO2015101860A1 (fr) 2013-12-30 2014-12-15 Appareil électroménager pour sécher le linge

Publications (2)

Publication Number Publication Date
EP3090091A1 EP3090091A1 (fr) 2016-11-09
EP3090091B1 true EP3090091B1 (fr) 2018-06-13

Family

ID=50190583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14830656.6A Active EP3090091B1 (fr) 2013-12-30 2014-12-15 Procédé de fonctionnement d'un appareil électroménager pour sécher le linge

Country Status (3)

Country Link
EP (1) EP3090091B1 (fr)
IT (1) ITPR20130106A1 (fr)
WO (1) WO2015101860A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004116899A (ja) * 2002-09-26 2004-04-15 Matsushita Electric Ind Co Ltd ヒートポンプ式乾燥機
DE10255575C1 (de) * 2002-11-28 2003-12-11 Miele & Cie Kondensationswäschetrockner mit einer Wärmepumpe
WO2011136592A2 (fr) * 2010-04-28 2011-11-03 엘지전자 주식회사 Procédé de commande d'un séchoir
EP2489775A1 (fr) * 2011-02-18 2012-08-22 Electrolux Home Products Corporation N.V. Sèche-linge à pompe à chaleur et procédé de fonctionnement d'un sèche-linge à pompe à chaleur
EP2551401A1 (fr) * 2011-07-28 2013-01-30 Electrolux Home Products Corporation N.V. Système de pompe à chaleur pour sèche-linge

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
ITPR20130106A1 (it) 2015-07-01
EP3090091A1 (fr) 2016-11-09
WO2015101860A1 (fr) 2015-07-09

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