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)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=37896175

Family Applications (1)

Country Status (5)

Cited By (4)

Families Citing this family (1)

Citations (5)

• 2006
  • 2006-12-08 AT AT06841311T patent/ATE423865T1/de not_active IP Right Cessation
  • 2006-12-08 DE DE602006005399T patent/DE602006005399D1/de active Active
  • 2006-12-08 EP EP06841311A patent/EP1974089B1/de not_active Not-in-force
  • 2006-12-08 WO PCT/EP2006/069488 patent/WO2007077094A1/en active Application Filing
  • 2006-12-08 DK DK06841311T patent/DK1974089T3/da active

Patent Citations (5)

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