EP1740756A1 - A washer/dryer and a control method - Google Patents

A washer/dryer and a control method

Info

Publication number
EP1740756A1
EP1740756A1 EP04744702A EP04744702A EP1740756A1 EP 1740756 A1 EP1740756 A1 EP 1740756A1 EP 04744702 A EP04744702 A EP 04744702A EP 04744702 A EP04744702 A EP 04744702A EP 1740756 A1 EP1740756 A1 EP 1740756A1
Authority
EP
European Patent Office
Prior art keywords
laundries
moisture
instant
burning
limit
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
EP04744702A
Other languages
German (de)
French (fr)
Other versions
EP1740756B1 (en
Inventor
Cem Arcelik Anonim Sirketi KURAL
Serdar Arcelik Anonim Sirketi HAMARAT
Gokhan Arcelik Anonim Sirketi DEMIRHAN
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 EP1740756A1 publication Critical patent/EP1740756A1/en
Application granted granted Critical
Publication of EP1740756B1 publication Critical patent/EP1740756B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/26—Heating arrangements, e.g. gas heating equipment
    • D06F58/266—Microwave 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • 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
    • D06F2103/64—Radiation, e.g. microwaves
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • 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
    • D06F2105/62—Stopping or disabling machine operation
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • 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
    • 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
    • D06F58/50—Responding to irregular working conditions, e.g. malfunctioning of blowers

Definitions

  • This invention is related to a washer/dryer and a control method which utilizes microwaves wherein burning incidences that can occur in the laundry are detected before they take place.
  • a magnetron which produces microwave energy and a drum wherein the laundry is placed is present in washer/dryers which utilize microwaves.
  • microwave energy When the microwave energy is directed towards the laundry inside the drum during the drying process, a formation of an arc occurs between metal objects such as metal zips, buttons, and keys left inside the pockets etc.
  • metal objects such as metal zips, buttons, and keys left inside the pockets etc.
  • the arcs and/or microwave ' energy appear the partial heating effect cause the laundry to turn yellow, to melt and to burn.
  • the object of this invention is to realize a washer/dryer and a control method which utilizes microwaves wherein burning, yellowing or melting incidences that can occur in the laundry during the drying cycle are determined before they take place.
  • FIG. 1 is a schematic view of a washer/dryer.
  • Figure 2 is a flow schematic view of a washer/dryer control method.
  • the components in the figures have each been numbered corresponding the following: Washer/dryer Tub Drum Circulation canal Magnetron Control unit Wave guide Condenser Fan 10 Heater 11 Tub outlet 12 Tub inlet 13 Gas sensor 14 Temperature sensor 15 Moisture sensor [009]
  • a washer/dryer (1) which utilize microwaves comprises a drum (3) wherein the laundry to be washed is placed, a tub (2) wherein the drum moves, a magnetron (5) which applies microwave energy in order to vaporize the water content inside the ⁇ laundry, a control unit (6) which regulates functioning by evaluating the data regarding the condition of washing/drying, a wave guide (7) which directs the microwaves towards on the laundry, a condenser (8) which ensures the moisture in the air to be separateed by condensing, a fan (9) which enables air circulation in
  • a moisture sensor (15) which is placed inside the circulation canal (4), which measures the moisture value of the air circulating in the drying cycle, which enables halting the drying process by warning with the control unit (6) when the amount of dryness exceeds the limit value could be a risk for the laundry
  • a temperature sensor (14) which is placed inside the circulation canal (4), which measures the temperature of the air circulating in the drying cycle, which enables halting the drying process by warning with the control unit (6) when the temperature exceeds the limit value where there is a burning, yellowing and melting risk for the laundry.
  • the gas sensor (13), the temperature sensor (14) and the moisture sensor (15) are placed inside the circulation canal (4) preferably after the condenser (8) and in between the fan (9) and the magnetron (5) in such a way that they are least effected from the heater (10) and the condenser (8).
  • the gas sensor (13), the temperature sensor (14) and the moisture sensor (15) send to the control unit (6) the measurement results they obtained during the drying phase.
  • the control unit (6) monitors to make sure the laundries reach the desired dryness and by haltinging the drying process it prevents yellowing, burning or melting which might occur in laundries.
  • the dryness level of the laundries is monitored with the moisture sensor (15) and gasses that might appear when burning or yellowing occurs are detected with the gas sensors (13).
  • the temperature sensor (14) is the final control point for preventing burning, yellowing and melting and it functions as a safety valve.
  • h_limitl the moisture value which indicates the desired dryness level of the laundries
  • gl the instant gas quantity comprised in the air circulated in the drying cycle
  • #g_limit the limit change quantity which shall not be exceeded in order to prevent the laundries from turning yellow or burning
  • T 1 the instant temperature of the air circulated in the drying cycle
  • T imit the limit temperature value which shall not be exceeded in order to prevent the laundries from melting, turning to yellow or burning.
  • the control method which detects burning incidences before they take place during the drying process of the laundries is composed of the following steps: - Starting the drying process (101), - Measuring, by means of a moisture sensor (15) the instantmoisture quantity (hi) of the air circulated in the drying cycle (102), - Comparing the instant moisture quantity (hi) with the moisture value (h_limitl) which indicates the desired dryness level of the laundries (103), - Halting the drying process if the instant moisture quantity (hi) greater than the moisture value (h_limitl) which indicates the desired dryness level of the laundries (108), - Measuring the instant gas quantity (gl) comprised in the air circulated in the drying cycle if the instant moisture quantity (hi) is less than the moisture value (h_limitl) which
  • the instant temperature (Tl) of the air circulated in the drying cycle if the quantity change (#g) of the instant gas quantity (gl) is less than the quantity change limit (#g_limit) which shall not be exceeded in order to prevent the laundries from turning yellow or burning (107), - Comparing the instant temperature (Tl) with the limit temperature value (T_limit) which shall not be exceeded in order to prevent the laundries from melting, turning yellow or burning (108),

Landscapes

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

Abstract

This invention is related to a washer/dryer (1) and a control method which utilizes microwaves wherein burning, yellowing or melting incidences that can occur in the laundries during the drying process due to temperature is detected before they take place.

Description

Description A WASHER/DRYER AND A CONTROL METHOD
[001] This invention is related to a washer/dryer and a control method which utilizes microwaves wherein burning incidences that can occur in the laundry are detected before they take place.
[002] A magnetron which produces microwave energy and a drum wherein the laundry is placed is present in washer/dryers which utilize microwaves. When the microwave energy is directed towards the laundry inside the drum during the drying process, a formation of an arc occurs between metal objects such as metal zips, buttons, and keys left inside the pockets etc. As a result of the the arcs and/or microwave 'energy appear the partial heating effect cause the laundry to turn yellow, to melt and to burn.
[003] In the American Patent No US 5606804, the laundry is dried by using microwave energy and hot air circulation at the same time. The different gas sensors placed inside the air canals which lets the hot air out of the system detect the gases coming out of the laundry when burning starts and the drying process is halted.
[004] The object of this invention is to realize a washer/dryer and a control method which utilizes microwaves wherein burning, yellowing or melting incidences that can occur in the laundry during the drying cycle are determined before they take place.
[005] A washer/dryer and a control method realized in order to attain the objects of the invention has been illustrated in the attached drawings, wherein;
[006] Figure 1 — is a schematic view of a washer/dryer. [007] Figure 2 — is a flow schematic view of a washer/dryer control method. [008] The components in the figures have each been numbered corresponding the following: Washer/dryer Tub Drum Circulation canal Magnetron Control unit Wave guide Condenser Fan 10 Heater 11 Tub outlet 12 Tub inlet 13 Gas sensor 14 Temperature sensor 15 Moisture sensor [009] A washer/dryer (1) which utilize microwaves comprises a drum (3) wherein the laundry to be washed is placed, a tub (2) wherein the drum moves, a magnetron (5) which applies microwave energy in order to vaporize the water content inside the ■ laundry, a control unit (6) which regulates functioning by evaluating the data regarding the condition of washing/drying, a wave guide (7) which directs the microwaves towards on the laundry, a condenser (8) which ensures the moisture in the air to be separateed by condensing, a fan (9) which enables air circulation in the drying cycle, a heater (10) which provides heat energy together with microwave energy to accelerate the drying process or when microwave energy is not used in the drying cycle, a tub outlet (11) through which the moisture in the air is absorbed from the tub (2), a tub inlet (12) through which the moisturless and heated air is delivered again to the tub (2), a circulation canal (4) wherein the drying cycle air is circulated, one or more gas sensors (13) which are placed inside the circulation canal (4), which detect gasses such as, methane, propane, butane etc. that appear in conditions where yellowing or burning of the laundry could occur, which enable halting the drying process by warning with the control unit (6) when the gas quantity exceeds the limit value where there is a burning, yellowing and melting risk for the laundry, a moisture sensor (15) which is placed inside the circulation canal (4), which measures the moisture value of the air circulating in the drying cycle, which enables halting the drying process by warning with the control unit (6) when the amount of dryness exceeds the limit value could be a risk for the laundry and a temperature sensor (14) which is placed inside the circulation canal (4), which measures the temperature of the air circulating in the drying cycle, which enables halting the drying process by warning with the control unit (6) when the temperature exceeds the limit value where there is a burning, yellowing and melting risk for the laundry.
[010] The gas sensor (13), the temperature sensor (14) and the moisture sensor (15) are placed inside the circulation canal (4) preferably after the condenser (8) and in between the fan (9) and the magnetron (5) in such a way that they are least effected from the heater (10) and the condenser (8).
[011] When the washer/dryer is operated, the gas sensor (13), the temperature sensor (14) and the moisture sensor (15) send to the control unit (6) the measurement results they obtained during the drying phase. By using the data obtained from the sensors (13, 14 and 15), the control unit (6) monitors to make sure the laundries reach the desired dryness and by haltinging the drying process it prevents yellowing, burning or melting which might occur in laundries. The dryness level of the laundries is monitored with the moisture sensor (15) and gasses that might appear when burning or yellowing occurs are detected with the gas sensors (13). The temperature sensor (14) is the final control point for preventing burning, yellowing and melting and it functions as a safety valve.
[012] When the said washer/dryer which utilizes microwaves is controlled the phrases below are defined as: [013] hi : the instant moisture quantity of the air circulated in the drying cycle;
[014] h_limitl : the moisture value which indicates the desired dryness level of the laundries; [015] gl : the instant gas quantity comprised in the air circulated in the drying cycle;
[016] #g: the change quantity of the instant gas quantity (gl);
[017] #g_limit: the limit change quantity which shall not be exceeded in order to prevent the laundries from turning yellow or burning; [018] T 1 : the instant temperature of the air circulated in the drying cycle;
[019] T imit: the limit temperature value which shall not be exceeded in order to prevent the laundries from melting, turning to yellow or burning. [020] In the said washer/dryer which utilizes microwaves, the control method which detects burning incidences before they take place during the drying process of the laundries is composed of the following steps: - Starting the drying process (101), - Measuring, by means of a moisture sensor (15) the instantmoisture quantity (hi) of the air circulated in the drying cycle (102), - Comparing the instant moisture quantity (hi) with the moisture value (h_limitl) which indicates the desired dryness level of the laundries (103), - Halting the drying process if the instant moisture quantity (hi) greater than the moisture value (h_limitl) which indicates the desired dryness level of the laundries (108), - Measuring the instant gas quantity (gl) comprised in the air circulated in the drying cycle if the instant moisture quantity (hi) is less than the moisture value (h_limitl) which indicates the desired dryness level of the laundries (104), - Calculating, with the control unit (6), the quantity change(#g) of the instant gas quantity (gl) (105), - Comparing the quantity change (#g) of the instant gas quantity (gl) with the quantity change limit (#g_limit) which shall not be exceeded in order to prevent the laundries from turning yellow or burning (106), - Halting the drying process if the quantity change (#g) of the instant gas quantity (gl) greater than the quantity change limit (#g_limit) which shall not be exceeded to prevent the laundries from turning to yellow or burning (109),
- Measuring, with the temperature sensor (14), the instant temperature (Tl) of the air circulated in the drying cycle if the quantity change (#g) of the instant gas quantity (gl) is less than the quantity change limit (#g_limit) which shall not be exceeded in order to prevent the laundries from turning yellow or burning (107), - Comparing the instant temperature (Tl) with the limit temperature value (T_limit) which shall not be exceeded in order to prevent the laundries from melting, turning yellow or burning (108),
- Halting the drying process if the instant temperature (Tl) greater than the limit temperature value (T_limit) which shall not be exceeded in order to prevent the laundries from turning yellow or burning (109),
- Returning back to the step where the moisture quantity (hi) is measured with the moisture sensor (15) if the instant temperature (Tl) is less than the limit temperature value (T_lim.it) which shall not be exceeded in order to prevent the laundries from turning yellow or burning (102). Using the gas sensor (13), the temperature sensor (14) and the moisture sensor (15) placed in the circulation canal (4) the dryness of the laundries in the drying cycle and burning or melting incidences before they take place are detected.

Claims

Claims
[001] A washer/dryer (1) comprising a magnetron (5) which applies microwave energy in order to vaporize the water content inside the laundries, a control unit (6) which regulates functioning by evaluating the data regarding the condition of washing/drying, a circulation canal (4) wherein the drying cycle air is circulated and characterized by one or more gas sensors (13) which are placed inside the circulation canal (4), which detect gasses such as, methane, propane, butane etc. that appear in conditions where yellowing or burning of the laundry could occur, which halts the drying process by warning with the control unit (6) when the gas quantity exceeds the limit value where there is a burning, yellowing and melting risk for the laundries, a moisture sensor (15) which is placed inside the circulation canal (4), which measures the moisture value of the air circulating in the drying cycle, which halts the drying process by warning with the control unit (6) when the moisture value exceeds the limit value where the amount of dryness could be a risk for the laundries and a temperature sensor (14) which is placed inside the circulation canal (4), which measures the temperature of the air circulating in the drying cycle, which haltss the drying process by warning with the control unit (6) when the heat exceeds the limit value where there is a burning, yellowing and melting risk for the laundries.
[002] A washer/dryer (1) as defined in Claim 1 comprising a drum (3) wherein the laundry to be washed is placed, a tub (2) wherein the drum moves, a condenser (8) which ensures the moisture in the air to be separated by condensing, a fan (9) which enables air circulation in the drying process and characterized by a gas s ensor (13), temperature sensor (14) and a moisture sensor (15) which are placed inside the circulation canal (4) after the condenser (8) and in between the fan (9) and the magnetron (5) in such a way that they are least effected from the heater (10) and the condenser (8).
[003] A control method for a washer/dryer (1) as defined in any of the claims above comprising the steps: starting the drying process (101); measuring, by means of a moisture sensor (15) the instant moisture quantity (hi) of the air circulated in the drying cycle (102); comparing the instant moisture quantity (hi) with the moisture value (h_limitl) which indicates the desired dryness level of the laundry (103); halting the drying process if the instant moisture quantity (hi) greater than the moisture value (hjimitl) which indicates the desired dryness level of the laundries (108); measuring the instant gas quantity (gl) comprised in the air circulated in the drying cycle if the instant moisture quantity (hi) is less than the moisture value (hjimitl) which indicates the desired dryness level of the laundries (104); calculating, by the control unit (6), the quantity change (#g) of the instant gas quantity (gl) (105); comparing the quantity change (#g) of the instant gas quantity (gl) with the quantity change limit (#g_limit) which shall not be exceeded in order to prevent the laundries from turning yellow or burning (106); halting the drying process if the quantity change (#g) of the instant gas quantity (gl) greater than the quantity change limit (#gjimit) which shall not be exceeded to prevent the laundries from turning to yellow or burning (109); measuring, with the temperature sensor (14), the instant heat (Tl) of the air circulated in the drying cycle if the quantity change (#g) of the instant gas quantity (gl) is less than the quantity change limit (#g_limit) which shall not be exceeded in order to prevent the laundries from turning yellow or burning (107); comparing the instant temperature (Tl) with the limit temperature value (T imit) which shall not be exceeded in order to prevent the laundries from melting, turning yellow or burning (108); halting the drying process if the instant temperature (Tl) greater than the limit temperature value (TJimit) which shall not be exceeded in order to prevent the laundries from turning yellow or burning (109); returning back to the step where the moisture quantity (hi) is measured with the moisture sensor (15) if the instant temperature (Tl) is less than the limit temperature value (TJimit) which shall not be exceeded in order to prevent the laundries from turning yellow or burning (102).
EP04744702.4A 2003-07-31 2004-07-30 A washer/dryer and corresponding control method Expired - Lifetime EP1740756B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200301241 2003-07-31
PCT/IB2004/051350 WO2005010270A1 (en) 2003-07-31 2004-07-30 A washer/dryer and a control method

Publications (2)

Publication Number Publication Date
EP1740756A1 true EP1740756A1 (en) 2007-01-10
EP1740756B1 EP1740756B1 (en) 2016-12-07

Family

ID=34102184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04744702.4A Expired - Lifetime EP1740756B1 (en) 2003-07-31 2004-07-30 A washer/dryer and corresponding control method

Country Status (3)

Country Link
EP (1) EP1740756B1 (en)
TR (1) TR200601130T1 (en)
WO (1) WO2005010270A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1863971B1 (en) * 2005-03-22 2016-02-24 Arçelik Anonim Sirketi A control method for a washer/dryer
JP5649062B2 (en) * 2011-04-13 2015-01-07 パナソニックＩｐマネジメント株式会社 Drum type washer / dryer
US9194625B2 (en) 2013-08-20 2015-11-24 Whirlpool Corporation Method for drying articles

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3700845A1 (en) * 1987-01-14 1987-10-08 Hubert Loos Microwave laundry drier
US5315765A (en) * 1992-04-27 1994-05-31 Melvin Holst High-efficiency fabric dryer
US5396715A (en) * 1994-06-09 1995-03-14 Electric Power Research Institute Microwave clothes dryer and method with fire protection
US5606804A (en) * 1995-10-23 1997-03-04 Electric Power Research Institute Microwave clothes dryer and method with hazard detection
JP3102637B2 (en) * 1997-10-08 2000-10-23 エルジー電子株式会社 Microwave washer / dryer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005010270A1 *

Also Published As

Publication number Publication date
WO2005010270A1 (en) 2005-02-03
EP1740756B1 (en) 2016-12-07
TR200601130T1 (en) 2006-06-21

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