EP3401436A1 - Une laveuse-sécheuse ameliorée - Google Patents

Une laveuse-sécheuse ameliorée Download PDF

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Publication number
EP3401436A1
EP3401436A1 EP18165294.2A EP18165294A EP3401436A1 EP 3401436 A1 EP3401436 A1 EP 3401436A1 EP 18165294 A EP18165294 A EP 18165294A EP 3401436 A1 EP3401436 A1 EP 3401436A1
Authority
EP
European Patent Office
Prior art keywords
tank
duct
dryer
air stream
extension
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
Application number
EP18165294.2A
Other languages
German (de)
English (en)
Other versions
EP3401436B1 (fr
Inventor
Aldo Fumagalli
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.)
Candy SpA
Original Assignee
Candy SpA
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Filing date
Publication date
Application filed by Candy SpA filed Critical Candy SpA
Publication of EP3401436A1 publication Critical patent/EP3401436A1/fr
Application granted granted Critical
Publication of EP3401436B1 publication Critical patent/EP3401436B1/fr
Active legal-status Critical Current
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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
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing 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
    • 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
    • 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
    • D06F2103/16—Washing liquid 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
    • D06F2103/32—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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply
    • 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 
    • 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

Definitions

  • the present invention relates to an improved laundry washer-dryer as defined in the preamble of claim 1.
  • the vapor in the drying air stream which is circulated by an electric fan through a duct that extends from the bottom of the tub containing the drum with the laundry to be dried once it has been washed in a laundry washer-dryer, is condensed by introducing a given amount of cold water in spray form into the duct and hence into the moist air steam, by drawing water from the water supply system of the place in which the machine is installed.
  • the cold water from the water supply system which typically has a temperature of 15°C, encounters the vapor entrained by the moist air stream from the laundry being dried which typically has a temperature ranging from 65 to 70°C and causes condensation of the vapor entrained by the air stream, thereby converting it into water droplets.
  • the condensation mode as discussed above was found in practice to lead to massive consumption of cold water from the water supply system, to an amount substantially equal to the amount of water required for the washing stage, i.e. about 55 liters for a machine that can handle 8 kg of laundry.
  • the present invention has the object to afford a reduction of the amount of water that is used for the condensation stage.
  • the present invention provides a laundry washer-dryer that affords improved efficiency, due to a more efficient utilization of the frigories of the cold water that is used for condensing the vapor contained in the drying air low and, as a result, reduces the required amount of water.
  • numeral 1 designates a portion of a tub of a laundry washer-dryer at its connection 2 with the suction duct 3 that draws in the drying air.
  • Air is drawn in by a conventional electric fan, referenced 4, which is located proximate to the outlet 5 of the duct 3 toward the environment outside the machine.
  • the duct 1 has a section 6 that extends in a direction of extension Y-Y transverse, preferably perpendicular (a vertical direction) to the direction of extension X-X of the bottom 7 of the tub 1 extends.
  • the machine comprises a tank 9 having a preset volume, which extends in the aforementioned direction of extension Y-Y.
  • the tank extends at least partially over the length of the section 6 of the duct 3, which means that its extent may be equal to or smaller than the extent of the section 6.
  • the tank 9 is made of a material that is able to afford efficient transfer of frigories, as more clearly explained hereinbelow.
  • the tank 9 is closed at a lower end 11 thereof and is open at an upper end 12 thereof.
  • a water inlet point is provided in the section 6 of the duct 3.
  • such inlet point includes a fluid connection 13, which is located at the lower end 1 of the tank 9.
  • the fluid connection 13 is configured to be able to be coupled to a water supply system and is located at the end 1 of the tank 9 for feeding water into the volume (i.e. the gap) using a solenoid valve 14 in a manner that will be better explained hereinbelow.
  • the tank 9 is composed of a wall 8 which extends into said duct 3 through which the moist air stream F1 flows.
  • the wall 8 is placed in said vertical section 6 and forms the gap having the preset volume, which extends parallel to the outer wall 10 of the duct.
  • the gap i.e. the volume of the tank 9 is delimited on one side by the outer surface 8' of the wall 8 and on the other side by the inner surface 10 of the duct 3 in its vertical section 6.
  • the inner surface is intended as the surface that faces the interior of the laundry washer-dryer
  • the outer surface is intended as the surface that faces the exterior of the laundry washer-dryer.
  • the wall 8 extends parallel to an inner surface 10 that defines the duct 1 in its vertical section 6.
  • the water introduced from the supply system into the volume of the tank 9, i.e. the gap, is confined on one side by the outer surface 8' of the wall 8 and on the other side by the inner surface 10 of the duct 3 in its vertical section 6.
  • the wall 8 has its inner surface 8", i.e. the surface that contacts the moist air stream F1, configured to maximize heat exchange between the water accumulated in the gap and the moist air stream F1.
  • the inner surface 8" is corrugated, to increase the heat exchange surface.
  • the tank 9 has a toroidal shape and the water introduced from the supply system into its volume is confined by the inner surface 8", whereas the outer surface 8' contacts with the moist air stream F1.
  • the outer surface 8' must be configured to maximize heat exchange between the water accumulated in the volume and the moist air stream F1.
  • This alternative embodiment also has a corrugated inner surface 8" of the toroid, to increase the heat exchange area.
  • the material that forms the wall 8 of the tank 9 is either a metal material or a plastic material.
  • the probe of a first temperature sensor 15 is placed in the tank 9, proximate to its upper end 12, to sense the temperature attained by the water in the tank 9, and a second temperature sensor, referenced 16, is placed proximate to the outlet 5 for the drying air stream, downstream from the electric fan 4 for its probe to sense the temperature attained by the air stream that flows out of the machine.
  • the washer-dryer comprises an electronic control unit, referenced 17, which is connected with the temperature sensors 15 and 16 as well as with a solenoid valve 14 to open and close the latter according to the temperature difference that is sensed by the aforementioned sensors.
  • the moist air stream F1 As the moist air stream F1 is moved by the electric fan 4 toward the outlet 5, it typically has a temperature that ranges from 65°C to 70°C. It flows along the wall 8 of the tank 9 which is supplied with cold water, typically at a temperature of about 15°C, from the water supply system, through the solenoid valve 14.
  • the moist air stream F1 is first cooled due to the frigories removed from the water in the tank 9, through its wall 8.
  • the flow rate of the cold water is given by the opening degree of the valve 14 as controlled by the control unit 17, and once it has released a first amount of frigories through the wall 8, it overflows (as shown by arrows F2) from the open upper end 12 of the tank 9 and falls through the vertical duct section 6 toward the tub 1, and impinges upon the vapor contained in the moist air stream F1.
  • the water from the supply system has a higher temperature, it still causes the stream F1 to be further cooled, and the vapor contained therein to be condensed.
  • the flow rate of the water supplied to the tank 9 from the water supply system is controlled, as mentioned above, by the solenoid valve 14, which is opened and closed by the control unit 17 that receives the temperature signals of the sensors 12 and 16.
  • the flow rate of water to be supplied to the tank 9 is controlled in response to the difference value between the temperature as detected by the sensor 16 on the air stream that flows out of the duct 6 and the temperature as detected by the sensor 15 in the water in the tank 9.
  • the present disclosure affords efficient use of the frigories provided by the water supplied from the water supply system, which is used to condense the vapor in the laundry-drying stream, because water remains in the duct that ejects the moist air stream for a longer time, as compared with the prior art, in which water is sprayed and quickly flows through the air stream to fall by gravity on the bottom of the tub.
  • the laundry washer-dryer of the invention can achieve a greater reduction of vapor in the moist drying stream, thereby potentially reducing the time and power consumption required for drying.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP18165294.2A 2017-05-08 2018-03-30 Un laveuse-sécheuse amelioree Active EP3401436B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102017000049412A IT201700049412A1 (it) 2017-05-08 2017-05-08 Macchina elettrodomestica lava-asciuga biancheria perfezionata.

Publications (2)

Publication Number Publication Date
EP3401436A1 true EP3401436A1 (fr) 2018-11-14
EP3401436B1 EP3401436B1 (fr) 2020-03-04

Family

ID=60020302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18165294.2A Active EP3401436B1 (fr) 2017-05-08 2018-03-30 Un laveuse-sécheuse amelioree

Country Status (2)

Country Link
EP (1) EP3401436B1 (fr)
IT (1) IT201700049412A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3792387A1 (fr) * 2019-09-10 2021-03-17 Johannes Guggenberger Échangeur de chaleur à condensation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2554740A2 (fr) 2011-08-01 2013-02-06 Samsung Electronics Co., Ltd. Appareil de séchage et lave-linge pourvu de ce dernier et procédé de commande de celui-ci
US20150176194A1 (en) 2013-12-23 2015-06-25 Dongbu Daewoo Electronics Corporation Drum type washing machine having a dryer therein
EP2891743A1 (fr) 2013-12-24 2015-07-08 Dongbu Daewoo Electronics Corporation Procédé de commande d'une machine à laver à tambour

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2554740A2 (fr) 2011-08-01 2013-02-06 Samsung Electronics Co., Ltd. Appareil de séchage et lave-linge pourvu de ce dernier et procédé de commande de celui-ci
US20150176194A1 (en) 2013-12-23 2015-06-25 Dongbu Daewoo Electronics Corporation Drum type washing machine having a dryer therein
EP2891743A1 (fr) 2013-12-24 2015-07-08 Dongbu Daewoo Electronics Corporation Procédé de commande d'une machine à laver à tambour

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3792387A1 (fr) * 2019-09-10 2021-03-17 Johannes Guggenberger Échangeur de chaleur à condensation

Also Published As

Publication number Publication date
IT201700049412A1 (it) 2018-11-08
EP3401436B1 (fr) 2020-03-04

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