EP1974089A1 - A dryer - Google Patents

A dryer

Info

Publication number
EP1974089A1
EP1974089A1 EP06841311A EP06841311A EP1974089A1 EP 1974089 A1 EP1974089 A1 EP 1974089A1 EP 06841311 A EP06841311 A EP 06841311A EP 06841311 A EP06841311 A EP 06841311A EP 1974089 A1 EP1974089 A1 EP 1974089A1
Authority
EP
European Patent Office
Prior art keywords
thermometer
condenser
providing
wet
dryer
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
EP06841311A
Other languages
German (de)
French (fr)
Other versions
EP1974089B1 (en
Inventor
Emre Ozturk
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 EP1974089A1 publication Critical patent/EP1974089A1/en
Application granted granted Critical
Publication of EP1974089B1 publication Critical patent/EP1974089B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/26—Condition of the drying air, e.g. air humidity or 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
    • D06F2103/02—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
    • D06F2103/28—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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/38—Time, e.g. duration
    • 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
    • D06F2103/58—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to condensation, e.g. condensate water level
    • 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

  • This invention relates to a dryer, which can measvre the humidity and make a drying decision acco ⁇ iing to the measured value.
  • the condenser which is used to remove the moisture in the cycling air circulated for drying the laundry, is cooled by means of a fan and then the condensation of the cycling air is provided.
  • the fan vacuums the cooling air from outer environment and directs it to the condenser by means of a deflector.
  • the moistvre in the drying air is condensed.
  • the dehumidified drying air is sent into the drum as dried and heated by being passed through the heaters.
  • the cooling air exiting the condenser is transferred to the outside of the dryer. Therefore, by means of a condenser with an enhanced moistvre condensation, a faster and more efficient operation of the dryer is provided.
  • the humidity is detected by the change in the resistance of a metal strip.
  • a plastic strip wound around the drum and a metal strip wound over the plastic strip are employed.
  • the dryness of the laundry is detected by the change in the resistance measured by a brush contacting the said metal strip.
  • the object of this invention is the realization of a dryer, which measures the relative humidity around the condenser, the drying efficiency of which is enhanced using the measured relative humidity value.
  • the relative humidity of the environment air surrounding the condenser is detected by the difference in temperatures measured by two thermometers, one of which is kept wet by a wetting means as the other directly contacting the environment air is kept dry, which are positioned side by side in the outlet of the channel whereby the drying air coming from the drum to into which the laundry to be dried are placed is directed, before the inlet of the condenser.
  • the amount of moisture is measured by a control ca ⁇ l using the formulas determined by the producer with respect to the environment pressire and the measired temperatire values and then the dryness of the laundry to be dried is detected.
  • thermometer is kept wet by a wick- like wetting means having one of its ends in a pool where the condensed water is collected as the other parts are wound around the wet thermometer.
  • thermometers one of which is continously kept wet by a wetting means as the other directly contacting the environment air is kept dry, which are positioned side by side in the channel outlet just before the entrance to the condenser and a thud thermometer which is kept wet by another wetting means and positioned right after the condenser are employed.
  • the relative humidity of the environment is measired by the two thermometers positioned right before the condenser inlet, one of which is wet the other is dry, while the dehu- midification performance of the condenser is detected by the wet thermometers which are positioned right before and after the condenser inlet.
  • the duration of the drying and heating steps is determined due to evaluated condenser performance.
  • Figire 1 - Is the perspective view of a dryer.
  • Figire 2 - Is the schematic view of a dryer comprising two thermometers positioned before the condenser.
  • Figire 3 - Is the schematic view of a dryer comprising a pool placed before a condenser and two thermometers which are positioned in the pool.
  • Figire 4 - Is the schematic view of a dryer comprising two thermometers positioned before a condenser and a wet thermometer positioned after the condenser.
  • Figire 5 - Is the schematic view of a pool, a thermometer and a wick- like wetting means wound around the thermometer and positioned in a pool.
  • Figire 6 - Is the schematic view of a pool, a thermometer and a pipe-shaped wetting means wound around the thermometer and positioned in a pool.
  • the dryers (1) comprise a drum (2) in which the laundry to be dried is placed, a condenser (3) providing the condensation and thus seperation of the moistire in the wet air inside the drum (2) so as to remove the moistire of the wet laundry inside the drum (2), a channel (5) providing the drying air within the drum (2) to be transferred to the condenser (3), a drying fan (8) positioned inside the channel (5), providing the drying air to be sucked from the drum (2), passed through the condenser (3) and transferred to the outer environment, a thermometer (11) which is kept dry and positioned in the channel (5) right before the condenser (3), measiring the temperatire of the environment, a thermometer (22) which is kept wet and positioned in the channel (5) right before the condenser (3), measiring the temperatire of the environment, a wetting means (6) providing the thermometer (22) to be kept wet using the accumulated condensed water (N), and a control carcl (4) which
  • thermometers (11, 22) located next to each other measire the temperatire of the environment while the cycling air coming from the drum (2) moves into the condenser (3). Diring the measirement, the water vaporized on the thermometer (22) which is kept wet using the moistire in the environment decreases the temperatire of the thermometer (22). Thus, they measire two different values even they are next to each other.
  • the control ca ⁇ l (4) which traces, recorcls the measirement values of these two thermometers (11, 22) and determines the relative humidity of the environment by using the difference between these values, executes the operation steps of the dryer in accoidance with the determined relative humidity.
  • the control ca ⁇ l (4) determines the relative humidity value by using the atmospheric pressire value and the temperatire values measired by the thermometers (11, 22).
  • the atmospheric pressire is used as an average atmospheric pressire value determined by the producer or the environment pressire value which is measired by a barometer located on the dryer (1).
  • the pressire and the temperatire values obtained, the correction factors, and the satirated water vapor pressire are all used in the water vapor pressire formulas and the relative humidity value is determined using these formulas.
  • the dryer (1) comprises a pool (7) positioned in the channel (5) right before the condenser (3), providing to collect the condensed water (N) so as to provide the wetting means (6) and thus the thermometer (22) contacting the wetting means (6) to be kept wet.
  • thermometer (22) is provided to be wet during the measu r ement.
  • a wetting means (6) is employed, having the form of a rope or a wick made of a liquid absorbing material, one end of which is immersed in the collected water (N) condensed, keeping the thermometer (22) wet with the water (N) it absorbs by being wound around the thermometer (22) (Figire 5).
  • a wetting means (6) having the form of a tube is employed, one end of which is immersed in the collected condensed water (N), creating a passage between the thermometer (2) and itself by being wound around the thermometer (2), providing a permanent wet water layer on the sirface of the thermometer (22) by the flux created by the vaporized water (N) through the passage (Figire 6).
  • the dryer (1) comprises a thud thermometer (33) positioned right after the condenser (3), which is kept wet by being in contact with the accumulated condensed water, providing to measire the air tem- peratire of the environment.
  • the control carcl (4) evaluates the work efficiency of the condenser (3) by tracing the difference between the values measired by the thermometers (22, 33). In accoidance with the work efficiency evaluated, the drying steps and the drying durations of the dryer are determined.
  • the relative humidity in the vicinity of the condenser (3) can be measired in a cheap and precise way, and the efficient working of the dryer is provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

This invention relates to a dryer, which can measure the humidity and make a drying decision according to the measured humidity value.

Description

Description A DRYER
[0001] This invention relates to a dryer, which can measvre the humidity and make a drying decision accoκiing to the measured value.
[0002]
[0003] In state-of-the-art embodiments, in condenser dryers, the condenser, which is used to remove the moisture in the cycling air circulated for drying the laundry, is cooled by means of a fan and then the condensation of the cycling air is provided. The fan vacuums the cooling air from outer environment and directs it to the condenser by means of a deflector. By cooling the condenser, the moistvre in the drying air is condensed. The dehumidified drying air is sent into the drum as dried and heated by being passed through the heaters. The cooling air exiting the condenser is transferred to the outside of the dryer. Therefore, by means of a condenser with an enhanced moistvre condensation, a faster and more efficient operation of the dryer is provided.
[0004] In the prior art, the humidity is detected by the change in the resistance of a metal strip. In this embodiment, a plastic strip wound around the drum and a metal strip wound over the plastic strip are employed. The dryness of the laundry is detected by the change in the resistance measured by a brush contacting the said metal strip.
[0005] In one of the state-of-the-art embodiments, in the United States Patent document no. US 5570520, a description is given of a dryer comprising a dryness detection system, which comprises two self-heating thermometers located in the air outlet, measuring the changes in the relative humidity.
[0006] The object of this invention is the realization of a dryer, which measures the relative humidity around the condenser, the drying efficiency of which is enhanced using the measured relative humidity value.
[0007] The dryer realized in oκier to fulfill the objectives of this invention is explicated in the first claim, and the other features are explicated in the dependant claims.
[0008] In the dryer of the present invention, the relative humidity of the environment air surrounding the condenser is detected by the difference in temperatures measured by two thermometers, one of which is kept wet by a wetting means as the other directly contacting the environment air is kept dry, which are positioned side by side in the outlet of the channel whereby the drying air coming from the drum to into which the laundry to be dried are placed is directed, before the inlet of the condenser. The amount of moisture is measured by a control caκl using the formulas determined by the producer with respect to the environment pressire and the measired temperatire values and then the dryness of the laundry to be dried is detected.
[0009] In an embodiment of the present invention, the thermometer is kept wet by a wick- like wetting means having one of its ends in a pool where the condensed water is collected as the other parts are wound around the wet thermometer.
[0010] In another embodiment of the present invention, two thermometers, one of which is continously kept wet by a wetting means as the other directly contacting the environment air is kept dry, which are positioned side by side in the channel outlet just before the entrance to the condenser and a thud thermometer which is kept wet by another wetting means and positioned right after the condenser are employed. The relative humidity of the environment is measired by the two thermometers positioned right before the condenser inlet, one of which is wet the other is dry, while the dehu- midification performance of the condenser is detected by the wet thermometers which are positioned right before and after the condenser inlet. The duration of the drying and heating steps is determined due to evaluated condenser performance.
[0011] The dryer which is realized in orcler to fulfill the objectives of this invention is illustrated in attached figires, where;
[0012] Figire 1 - Is the perspective view of a dryer.
[0013] Figire 2 - Is the schematic view of a dryer comprising two thermometers positioned before the condenser.
[0014] Figire 3 - Is the schematic view of a dryer comprising a pool placed before a condenser and two thermometers which are positioned in the pool.
[0015] Figire 4 - Is the schematic view of a dryer comprising two thermometers positioned before a condenser and a wet thermometer positioned after the condenser.
[0016] Figire 5 - Is the schematic view of a pool, a thermometer and a wick- like wetting means wound around the thermometer and positioned in a pool.
[0017] Figire 6 - Is the schematic view of a pool, a thermometer and a pipe-shaped wetting means wound around the thermometer and positioned in a pool.
[0018] Elements shown in figires are numbered as follows :
1. Dyer
2. Ehm
3. Condenser
4. Control Carcl
5. Channel
6. Wetting means 7. Pool
8. Dyer fan
[0019] 11. 22. 33. Thermometer
[0020] The dryers (1) comprise a drum (2) in which the laundry to be dried is placed, a condenser (3) providing the condensation and thus seperation of the moistire in the wet air inside the drum (2) so as to remove the moistire of the wet laundry inside the drum (2), a channel (5) providing the drying air within the drum (2) to be transferred to the condenser (3), a drying fan (8) positioned inside the channel (5), providing the drying air to be sucked from the drum (2), passed through the condenser (3) and transferred to the outer environment, a thermometer (11) which is kept dry and positioned in the channel (5) right before the condenser (3), measiring the temperatire of the environment, a thermometer (22) which is kept wet and positioned in the channel (5) right before the condenser (3), measiring the temperatire of the environment, a wetting means (6) providing the thermometer (22) to be kept wet using the accumulated condensed water (N), and a control carcl (4) which keeps the reconi of the temperatires measired by the wet thermometer and the dry thermometer, evaluating the relative humidity of the environment by using the difference between these values, providing the determination of the drying using the relative humidity value.
[0021] In the embodiment of the present invention, the thermometers (11, 22) located next to each other measire the temperatire of the environment while the cycling air coming from the drum (2) moves into the condenser (3). Diring the measirement, the water vaporized on the thermometer (22) which is kept wet using the moistire in the environment decreases the temperatire of the thermometer (22). Thus, they measire two different values even they are next to each other. The control caκl (4) which traces, recorcls the measirement values of these two thermometers (11, 22) and determines the relative humidity of the environment by using the difference between these values, executes the operation steps of the dryer in accoidance with the determined relative humidity.
[0022] The control caκl (4) determines the relative humidity value by using the atmospheric pressire value and the temperatire values measired by the thermometers (11, 22). The atmospheric pressire is used as an average atmospheric pressire value determined by the producer or the environment pressire value which is measired by a barometer located on the dryer (1). The pressire and the temperatire values obtained, the correction factors, and the satirated water vapor pressire are all used in the water vapor pressire formulas and the relative humidity value is determined using these formulas.
[0023] In another embodiment of the present invention, the dryer (1) comprises a pool (7) positioned in the channel (5) right before the condenser (3), providing to collect the condensed water (N) so as to provide the wetting means (6) and thus the thermometer (22) contacting the wetting means (6) to be kept wet.
[0024] In this embodiment, by collecting water into the pool (7) continuously, the thermometer (22) is provided to be wet during the measurement.
[0025] In an embodiment of the present invention, a wetting means (6) is employed, having the form of a rope or a wick made of a liquid absorbing material, one end of which is immersed in the collected water (N) condensed, keeping the thermometer (22) wet with the water (N) it absorbs by being wound around the thermometer (22) (Figire 5).
[0026] In another embodiment of the present invention, a wetting means (6) having the form of a tube is employed, one end of which is immersed in the collected condensed water (N), creating a passage between the thermometer (2) and itself by being wound around the thermometer (2), providing a permanent wet water layer on the sirface of the thermometer (22) by the flux created by the vaporized water (N) through the passage (Figire 6).
[0027] In another embodiment of the present invention, the dryer (1) comprises a thud thermometer (33) positioned right after the condenser (3), which is kept wet by being in contact with the accumulated condensed water, providing to measire the air tem- peratire of the environment. In this embodiment, the control carcl (4) evaluates the work efficiency of the condenser (3) by tracing the difference between the values measired by the thermometers (22, 33). In accoidance with the work efficiency evaluated, the drying steps and the drying durations of the dryer are determined.
[0028] By way of the embodiment of the present invention, the relative humidity in the vicinity of the condenser (3) can be measired in a cheap and precise way, and the efficient working of the dryer is provided.

Claims

Claims
[0001] A dryer (1) comprising a drum (2) into which the laundry to be dried is placed, a condenser (3) providing the moisture in the wet air inside the drum (2) to be seperated by being condensed, so as to remove the moisture in the wet laundry within the drum (2), and a channel (5) providing to transfer the drying air inside the drum (2) to the condenser (3), and characterized by a thermometer (11) which is kept dry and positioned within the channel (5) right before the condenser (3), measuring the temperature of the environment, a thermometer (22) positioned right before the condenser (3) within the channel (5), providing to measure the temperature of the environment by being kept wet, a wetting means providing to keep the thermometer (22) wet using the accumulated condensed water (N) and a control card (4) which keeps the record of the temperature values measured by the wet thermometer (22) and the dry thermometer (11), providing to evaluate the relative humidity of the environment using the difference between these values and the determination of the drying durations according to the evaluated relative humidity value.
[0002] A dryer (1) as in Claim 1, characterized by a pool (7) positioned within the channel (5) right before the condenser (3), providing the wetting means and thus the thermometer (22) to be kept wet by collecting the condensed water (N).
[0003] A dryer (1) as in Claim 1 or Claim 2, characterized by a wetting means (6) in form of a rope or a wick made of an absorbent material, having one of its ends in the water (N) collected via condensation, wound around the thermometer (22), providing the thermometer to be kept wet using the water it absorbs.
[0004] A dryer (1) as in Claim 1 or Claim 2, characterized by a wetting means (6) in form of a tube, having one of its ends immersed in the collected condensed water (N), creating a passage between the thermometer (2) and itself by being wound around the thermometer (2), providing a permanent wet water layer on the surface of the thermometer (22) by the flux created by the vaporized water (N) through this passage.
[0005] A dryer (1) as in any one of the above Claims, characterized by a thermometer
(33) positioned right after the condenser (3), kept wet by being in contact with the accumulated condensed water, providing to measure the air temperature of the environment.
[0006] A dryer (1) as in Claim 5, characterized by a control card (4) which evaluates the work efficiency of the condenser (3) by tracing the difference between the values measured by the thermometers (22, 33).
EP06841311A 2005-12-30 2006-12-08 A dryer Not-in-force EP1974089B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200505408 2005-12-30
PCT/EP2006/069488 WO2007077094A1 (en) 2005-12-30 2006-12-08 A dryer

Publications (2)

Publication Number Publication Date
EP1974089A1 true EP1974089A1 (en) 2008-10-01
EP1974089B1 EP1974089B1 (en) 2009-02-25

Family

ID=37896175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06841311A Not-in-force EP1974089B1 (en) 2005-12-30 2006-12-08 A dryer

Country Status (5)

Country Link
EP (1) EP1974089B1 (en)
AT (1) ATE423865T1 (en)
DE (1) DE602006005399D1 (en)
DK (1) DK1974089T3 (en)
WO (1) WO2007077094A1 (en)

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Publication number Priority date Publication date Assignee Title
CN103662116A (en) * 2012-09-25 2014-03-26 昆山尚达智机械有限公司 Dried material package moisture prevention and absorption device

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Publication number Priority date Publication date Assignee Title
DE102007061519A1 (en) * 2007-12-20 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH A laundry drying apparatus having a moisture determining device and methods of operating a clothes drying machine
CN201321571Y (en) * 2008-11-25 2009-10-07 博西华电器（江苏）有限公司 Household clothes drying equipment
CN201386218Y (en) * 2009-03-02 2010-01-20 博西华电器（江苏）有限公司 Household clothing drying equipment
CN114182510A (en) * 2021-12-31 2022-03-15 广东美的白色家电技术创新中心有限公司 Clothes dryer control method and device, clothes dryer and storage medium

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DE2331688A1 (en) * 1973-06-22 1975-01-16 Licentia Gmbh Fabric moisture measuring device for tumbler dryer - measures variation in heat-transfer resistance as air and coolant supplied to it
DE3111426A1 (en) * 1981-03-24 1982-10-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Laundry drier
DE19842644A1 (en) * 1998-09-17 2000-03-23 Bsh Bosch Siemens Hausgeraete Domestic laundry drying appliance has sensors to monitor the air flow temps to vary the power supply to the air heater to control its heating action
DE60220169T2 (en) * 2002-11-15 2008-02-14 Candy S.P.A., Monza Process for drying laundry in a drying device
KR100480929B1 (en) * 2003-08-12 2005-04-07 엘지전자 주식회사 Method for controlling drying of tumble drier

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103662116A (en) * 2012-09-25 2014-03-26 昆山尚达智机械有限公司 Dried material package moisture prevention and absorption device

Also Published As

Publication number Publication date
EP1974089B1 (en) 2009-02-25
ATE423865T1 (en) 2009-03-15
DK1974089T3 (en) 2009-06-02
WO2007077094A1 (en) 2007-07-12
DE602006005399D1 (en) 2009-04-09

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