EP3853404B1 - A laundry dryer - Google Patents

A laundry dryer Download PDF

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Publication number
EP3853404B1
EP3853404B1 EP19748818.2A EP19748818A EP3853404B1 EP 3853404 B1 EP3853404 B1 EP 3853404B1 EP 19748818 A EP19748818 A EP 19748818A EP 3853404 B1 EP3853404 B1 EP 3853404B1
Authority
EP
European Patent Office
Prior art keywords
fan
drum
air
laundry
circulation duct
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
EP19748818.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3853404A1 (en
Inventor
Onur Hartoka
Gokhan SIR
Basak Arslan
Mehmet Kaya
Cigdem Ezgi SEVER
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP3853404A1 publication Critical patent/EP3853404A1/en
Application granted granted Critical
Publication of EP3853404B1 publication Critical patent/EP3853404B1/en
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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 
    • 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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • 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 heat pump or conventional laundry dryer.
  • the drying air moved by a fan is passed over the laundry inside the drum to be dehumidified and the water vapor in the air is condensed in the condenser.
  • the drying air dehumidified in the condenser is then heated by being passed over the heater, and thus hot and dry air is delivered onto the laundry.
  • the heat pump used for drying the laundry is composed of flow pipes wherein the refrigerant fluid flows, a compressor which provides the circulation of the refrigerant by pressurizing the same, an evaporator and a condenser. In the drying process, the drying air moved by the process fan is passed over the laundry.
  • the condenser located in the heat pump functions as a heater and the evaporator as a condenser.
  • the drying air is heated while passing over the condenser, delivered onto the laundry as heated and after dehumidifying the laundry, is condensed while passing over the evaporator.
  • a single motor is used for moving the drum and operating the fan which provides the air circulation.
  • the drum rotates clockwise or counterclockwise depending on the direction of the motor, and since the process fan is driven by the same motor, the process fan similarly rotates in both directions and provides air flow.
  • the drum Since in laundry dryers the fan, which provides the air circulation, and the drum are driven by the same motor, the drum also has to rotate continuously while providing air flow. This causes the noise to increase and the delicate laundry to be worn down due to the mechanical effect caused by the rotation of the drum.
  • the aim of the present invention is the realization of a laundry dryer wherein the delicate laundry is prevented from being worn down and the drying process duration is shortened.
  • EP2765235 discloses a laundry dryer comprising a control unit.
  • German Patent Application No. DE2429078 discloses an automatic clothes drier comprises a horizontal-axis rotary perforated drum surrounded at a distance by a stationary casing, and a condenser for removing humidity from the drying air.
  • the laundry dryer realized in order to attain the aim of the present invention comprises a heat pump system composed of an air circulation duct which enables the process air to be passed over the laundry in the drum, a first fan which moves the process air, a compressor which provides the circulation of the refrigerant, an evaporator and a condenser, or in the conventional type, a heater and a heat exchanger.
  • a main motor operates the drum and the first fan together.
  • the process air is continued to be circulated when the drum and the first fan are deactivated.
  • the second fan is positioned at the outlet of the condenser in the heat pump laundry dryer, and at the outlet of the heater in the conventional laundry dryer.
  • the laundry dryer (1) comprises a body; a drum (2) wherein the laundry to be dried is placed; a heat pump system having an air circulation duct (3) which enables the process air to be passed over the laundry in the drum (2), a first fan (4) which is disposed in the air circulation duct (3) and which moves the process air, a compressor (5) which performs the refrigerant cycle, an evaporator (6) which enables the process air to be dehumidified and a condenser (7) which enables the process air to be heated; a main motor (8) which operates the drum (2) and the first fan (4) at the same time, thus rotating the drum (2) during the drying process while providing the circulation of the process air by means of the first fan (4); and a control unit (11) which regulates the drying process.
  • the laundry dryer (1) of the present invention comprises a second fan (10) which is disposed in the air circulation duct (3), which provides the continuity of the circulation of the process air in the drum (2) via the air circulation duct (3) when the drum (2) and the first fan (4) are deactivated during the drying process, and which is operated by an auxiliary motor (9) independently of the main motor (8).
  • the second fan (10) is positioned in the air circulation duct (3) at the outlet of the condenser (7) where the humidity of the process air is at the lowest level and the temperature of the process air is at the highest level. Moreover, the outlet of the condenser (7) is the point which least affects the flow rate of the process air. Thus, the adverse effect on the energy efficiency of the system when the second fan (10) is deactivated is minimized.
  • the humid process air leaving the drum (2) passes through the evaporator (6) and the condenser (7) and then is directed to the drum (2) via the air circulation duct (3) by the first fan (4).
  • the drum (2) and the fan (4) which enables the process air to be circulated in the air circulation duct (3) and the drum (2) are driven by the main motor (8). Therefore, when the drum (2) stops the first fan (4) also stops, and when the drum (2) rotates in the opposite direction, the first fan (4) also rates in the opposite direction. Particularly in delicate textile programs and quiet drying programs, the drum (2) is required to be stopped at intervals in order to reduce the movement thereof.
  • the second fan (10) when the drum (2) and the first fan (4) are stopped, the second fan (10) is activated by the auxiliary fan (9), thus resuming the process air flow.
  • the second fan (10) moves the air with high temperature and low humidity at the outlet of the condenser (7), thus improving the drying performance.
  • the delicate laundry is prevented from being worn down and is enabled to be quickly dried.
  • control unit (11) executes a drying program wherein the second fan (10) is operated only when the drum (2) and the first fan (4) are stopped intermittently. Said drying program is used to prevent the laundry affected by the mechanical movement from being worn down and/or to consume less energy.
  • control unit (11) executes a drying program wherein the second fan (10) is continuously operated and the drum (2) and the first fan (4) are stopped intermittently. Said drying program is used to air the laundry and remove odors and to decrease the formation of lint and the mechanical damage caused by the continuous rotation of the dry laundry with the drum (2).
  • control unit (11) executes a drying program wherein the second fan (10) is continuously operated and the drum (2) and the first fan (4) are completely stopped.
  • this program the air at high temperature and low flow rate is enabled to flow, and delicate laundry, which is excessively affected by the mechanical movement, is prevented from being worn down.
  • hygiene programs only the second fan (10) is operated, thus performing the drying process at low flow rate.
  • control unit (11) executes a drying program wherein the drum (2), the first fan (4) and the second fan (10) are continuously operated.
  • This drying program is used to decrease the total drying time by increasing the flow rate of the process air and to quickly air the laundry and remove odors.
  • a conventional laundry dryer (12) comprises a drum (2) wherein the laundry to be dried is placed; an air circulation duct (3) which enables the process air to be passed over the laundry in the drum (2); a first fan (4) which is disposed in the air circulation duct (3) and which moves the process air; a heater (13) which heats the process air; a heat exchanger (14) which dehumidifies the process air; a main motor (8) which operates the drum (2) and the first fan (4) at the same time, thus rotating the drum (2) during the drying process while providing the circulation of the process air by means of the first fan (4); and a second fan (10) which is disposed in the air circulation duct (3), which is operated by an auxiliary motor (9) independently of the main motor (8), and which provides the continuity of the circulation of the process air in the drum (2) via the air circulation duct (3) when the drum (2) and the first fan (4) are deactivated.
  • the second fan (10) is disposed in the air circulation duct (3) at the outlet of the heater (13).
  • the second fan (10) which is disposed in the air circulation duct (3) at the outlet of the condenser (7) enables the drying process to be carried out with minimum mechanical effect while not moving or barely moving the drum (2) during the drying of the delicate laundry.
  • the laundry is prevented from being worn down. Energy consumption, total drying time and noises caused by the rotation of the drum (2) are decreased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP19748818.2A 2018-09-18 2019-07-31 A laundry dryer Active EP3853404B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201813389 2018-09-18
PCT/EP2019/070682 WO2020057839A1 (en) 2018-09-18 2019-07-31 A laundry dryer

Publications (2)

Publication Number Publication Date
EP3853404A1 EP3853404A1 (en) 2021-07-28
EP3853404B1 true EP3853404B1 (en) 2024-01-03

Family

ID=67514652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19748818.2A Active EP3853404B1 (en) 2018-09-18 2019-07-31 A laundry dryer

Country Status (3)

Country Link
EP (1) EP3853404B1 (pl)
PL (1) PL3853404T3 (pl)
WO (1) WO2020057839A1 (pl)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2429078A1 (de) * 1974-03-20 1976-01-08 Hugo Werner Geschka Automatischer waeschetrockner
JP2014150859A (ja) * 2013-02-06 2014-08-25 Panasonic Corp 衣類乾燥機
GB2519185B (en) * 2014-05-30 2015-09-30 Dbk David & Baader Gmbh A tumble dryer
US20170254014A1 (en) 2016-03-07 2017-09-07 Atul Vir Venting laundry dryer with two fans

Also Published As

Publication number Publication date
PL3853404T3 (pl) 2024-05-20
WO2020057839A1 (en) 2020-03-26
EP3853404A1 (en) 2021-07-28

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