EP0893532A1 - Wäschetrockner - Google Patents

Wäschetrockner Download PDF

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Publication number
EP0893532A1
EP0893532A1 EP97305517A EP97305517A EP0893532A1 EP 0893532 A1 EP0893532 A1 EP 0893532A1 EP 97305517 A EP97305517 A EP 97305517A EP 97305517 A EP97305517 A EP 97305517A EP 0893532 A1 EP0893532 A1 EP 0893532A1
Authority
EP
European Patent Office
Prior art keywords
clothes dryer
drum
lamps
clothes
infrared
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.)
Withdrawn
Application number
EP97305517A
Other languages
English (en)
French (fr)
Inventor
Yu Shinan
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.)
Regentech Ltd
Original Assignee
Regentech Ltd
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 Regentech Ltd filed Critical Regentech Ltd
Priority to EP97305517A priority Critical patent/EP0893532A1/de
Publication of EP0893532A1 publication Critical patent/EP0893532A1/de
Withdrawn legal-status Critical Current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 
    • D06F58/26—Heating arrangements, e.g. gas heating equipment
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/52—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to electric heating means, e.g. temperature or voltage
    • 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
    • D06F2105/28—Electric heating

Definitions

  • the present invention relates to a clothes dryer, and in particular to an improvement in heating means of the clothes dryer.
  • a conventional clothes dryer consists of a stationary housing, a rotatable drum, and means for heating, ventilation, transmission and control installed within said housing.
  • the conventional heating means is a PTC semiconductor heating element mounted on the wall of said housing at the site of the ventilation inlet. Once connected to the power supply, the heating element increases its own temperature and then radiates the heat into the surrounding air.
  • the ventilation means will draw the heated air into the drum through the ventilation inlet and the heated air will dry clothes within the drum.
  • the mechanism of this kind of clothes dryer is to heat the clothes to a relatively high degree, under which the rate of water vaporization out of the clothes is higher than that of moisture absorption into the clothes in the environment.
  • the disadvantages of a conventional clothes dryer include:
  • An object of the present invention is to compensate the technical deficiency of current clothes dryers by the use of a new type of heating means.
  • the present invention optimizes the structure of a clothes dryer so that the said clothes dryer has the advantages of lower power consumption, time-saving, adjustability of temperature, and lower temperature within said drum, etc.
  • the present invention consists in a clothes dryer comprising a stationary housing, a rotatable drum mounted within said housing, and means for heating, ventilation, transmission and control, characterized in that said heating means comprises one or more infrared lamps.
  • the lamp(s) may be mounted on the interior wall of the drum, and power may be supplied to the lamp(s) by a current inlet ring connected to a drum-supporting shaft, while an electric brush mounted on the outer wall of said drum is connected to said current inlet ring. If a perforated drum is used, said lamp(s) can, additionally or alternatively, be mounted on the interior wall of said housing.
  • said control means preferably comprise a thyristor that is used for controlling the power to said lamps; and the wavelength of infrared radiation of said lamps preferably ranges 1.2-6.5 ⁇ :
  • the infrared lamp(s) are preferably made of quartz tungsten halogen lamps sintered with an infrared-radiating layer of a mixture of quartz powder and a non-metal oxide, the oxygen enriched porous silica powder.
  • the clothes drying process of the present invention is described as follows: the clothes after washing and spinning are put into the drum. Upon selection of the drying programme, the motor assembly is activated and the damp clothes are tumbled by the rotation of the drum. Once the infrared-radiating lamps are connected to the power, the lamps light up and radiate the infrared directly and evenly to the damp clothes. Under the direct infrared radiation, water molecules are vaporized out of the clothes and then the hot damp air within the drum is ventilated out by a fan. This makes the clothes dry.
  • the mechanism of the present invention is to dry the clothes by using the method of radiating infrared to the clothes.
  • the best source of infrared radiation is to use quartz tungsten halogen lamps coated with oxygen enriched porous silicon.
  • the radiating efficiency will particularly increase when the infrared wavelength is in the range of 2-5 ⁇ .
  • the infrared radiation under this wavelength enables water molecules to be vaporized by unleashing the binding of surrounding water aggregates. Therefore, there is no need to heat the water to a higher degree so as to enhance the effect of water vaporization.
  • the clothes dryer comprises a stationary housing 1, a rotatable drum 2, and means for heating, ventilation, transmission and control of the dryer.
  • the drum 2 is mounted with its rotational axis horizontal in the central location of the housing 1.
  • the front of the housing has a round opening 21 corresponding to a monitoring window 111 on the housing door 11.
  • the housing has a supplementary supporting function and a felt seal 6 is installed in between in order to reduce the air entrance through any crevices.
  • a shaft sleeve 22 is connected to a supporting shaft 51.
  • the supporting shaft 51 is fixed on a stand 12 at the back of the housing.
  • a motor 52 rotates the drum 2 along the supporting shaft through a pulley (not shown) installed on the outer wall of the drum.
  • the lower front of the housing has a ventilation inlet 41.
  • a fan 42 is installed on the supporting shaft 51 and a protection cap 13 driven by the motor 52 is used to cover the fan 42.
  • On the protection cap there is a ventilation outlet 43.
  • the lamps are heat-insulated by a ceramic stand on the lamp bracket. Outside of the lamps, there is a netted lampshade 32 in an arch shape to cover the lamps.
  • the special infrared source used in the present invention has a wavelength of 3-4 ⁇ .
  • the surface temperature of the lamps is set at 300°C.
  • the selected lamp is a quartz tungsten halogen lamp.
  • a mixed layer of quartz powder and a non-metal oxide, the oxygen enriched porous silica powder is sintered on the lamp. In order to make sintering work easier, 25% of quartz powder needs to be added to the mixture.
  • the useful life of the lamp is approximately 1,000 hours.
  • the illuminated lamp does not break when splashed with water.
  • the coated layer is non-poisonous, as evidenced by a lab test.
  • the power wire for the lamps is connected to an electric brush 33 through the wall of the drum and the electric brush is connected to a current inlet ring.
  • the wire of the current inlet ring is placed through the supporting shaft 51, which is controlled by the main electric circuit for switch control and power level.
  • the main electric circuit of the dryer consists of a timer electric circuit I, a power control electric circuit II, and an indicating electric circuit III.
  • the timer electric circuit I is used for setting the clothes drying time and consists of a timer DS (model SG CC4hB) which controls switching of the motor and lamps, a temperature controller, and a moisture controller WK.
  • a timer DS model SG CC4hB
  • the present invention has a fusing wire BX installed and there is a switch K on the door of the dryer. When the door is open or not closed tightly, the switch K prevents the main electric circuit from being activated so as to avoid any potential danger.
  • the power control electric circuit II consists of a dura-directional thyristor SCR (Model BTA 140), trigger diode DB, resistor R1, potentiometer R2 and capacitor C2.
  • the electric potentiometer R2 is controlled by adjusting the power on a control panel 14.
  • the power output of three groups of infra-red radiating lamps (DG1,DG2,DG3) can also be adjusted through the change of conduction angle of the thyristor SCR.
  • the indicating electric circuit III consists of LED D1, diode D2 and resistor R3 and can monitor the working condition and power level of the lamps DG1,DG2,DG3.
  • the working mechanism of the electric circuits is explained as follows:
  • the power supply of the motor MD is controlled by the timer DS as well as the door switch K.
  • the power level of three lamps DG1,DG2,DG3 are simultaneously controlled by the thyristor SCR.
  • the charging electric circuit is formed by R1,R2, and C2 and changing the resistance of R2 can change the charging time.
  • the trigger diode DB and the dura-directional thyristor SCR are connected in succession, and then the power is provided.
  • R2 the conduction angle of the thyristor can be controlled so that the power level of the lamps can be adjusted.
  • the indicating electric circuit II is formed by LED D2, diode D3 and resistor R3, of which R3 restrains the current volume and D2 protects the LED from breakdown.
  • R3 restrains the current volume and D2 protects the LED from breakdown.
  • the fuse wire BX is installed to avoid large current volume surging through the electric circuit.
  • the control panel is installed on the top of the housing.
  • the clothes drying time, the highest allowable temperature and the clothes drying method can be selected based on the clothes material and number of clothes, the power of the clothes dryer being adjustable through the conduction angle of the thyristor.
  • the operation can be performed automatically or manually.
  • the sensors of temperature and moisture are placed on the lampshade and ventilation outlet. Based on the sensors feedback, the power of the lamps is adjusted.
  • the housing door 11 is located in the front centre of the housing 1.
  • the lower front of the housing has a decorative cover 15 on which a trade mark and decorative graph can be printed.
  • the control panel and the decorative cover are interchangeable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP97305517A 1997-07-23 1997-07-23 Wäschetrockner Withdrawn EP0893532A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97305517A EP0893532A1 (de) 1997-07-23 1997-07-23 Wäschetrockner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97305517A EP0893532A1 (de) 1997-07-23 1997-07-23 Wäschetrockner

Publications (1)

Publication Number Publication Date
EP0893532A1 true EP0893532A1 (de) 1999-01-27

Family

ID=8229432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97305517A Withdrawn EP0893532A1 (de) 1997-07-23 1997-07-23 Wäschetrockner

Country Status (1)

Country Link
EP (1) EP0893532A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002090640A1 (en) * 2001-05-04 2002-11-14 Multibrâs S/A Electrodomèsticos Clothes drying machine
US8317275B2 (en) 2005-12-23 2012-11-27 Lg Electronics Inc. Laundry device
US8763432B2 (en) 2005-12-23 2014-07-01 Lg Electronics Inc. Laundry device
DE102016110871A1 (de) * 2016-05-19 2017-11-23 Miele & Cie. Kg Wäschetrockner

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2406494A (en) * 1943-05-14 1946-08-27 Gen Motors Corp Domestic appliance
DE2105865A1 (de) * 1971-01-28 1972-08-10 Siemens Elektrogeraete Gmbh Nach dem Trommelprinzip arbeitender Wäschetrockner
DE3324350A1 (de) * 1983-07-06 1985-01-24 Wilh. Cordes GmbH & Co, 4740 Oelde Waeschetrockner mit einer die zu trocknende waesche aufnehmenden kammer
GB2150681A (en) * 1983-12-02 1985-07-03 Thorn Emi Domestic Appliances Tumble driers
DE3903185A1 (de) * 1989-02-03 1990-08-16 Zanker Gmbh & Co Ohg Waeschetrockner und verfahren zum behandeln von waesche

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2406494A (en) * 1943-05-14 1946-08-27 Gen Motors Corp Domestic appliance
DE2105865A1 (de) * 1971-01-28 1972-08-10 Siemens Elektrogeraete Gmbh Nach dem Trommelprinzip arbeitender Wäschetrockner
DE3324350A1 (de) * 1983-07-06 1985-01-24 Wilh. Cordes GmbH & Co, 4740 Oelde Waeschetrockner mit einer die zu trocknende waesche aufnehmenden kammer
GB2150681A (en) * 1983-12-02 1985-07-03 Thorn Emi Domestic Appliances Tumble driers
DE3903185A1 (de) * 1989-02-03 1990-08-16 Zanker Gmbh & Co Ohg Waeschetrockner und verfahren zum behandeln von waesche

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002090640A1 (en) * 2001-05-04 2002-11-14 Multibrâs S/A Electrodomèsticos Clothes drying machine
US8317275B2 (en) 2005-12-23 2012-11-27 Lg Electronics Inc. Laundry device
US8763432B2 (en) 2005-12-23 2014-07-01 Lg Electronics Inc. Laundry device
DE102016110871A1 (de) * 2016-05-19 2017-11-23 Miele & Cie. Kg Wäschetrockner
DE102016110871B4 (de) * 2016-05-19 2019-05-29 Miele & Cie. Kg Wäschetrockner

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