EP1096054B1 - Procédé de controle du caractère aseptique du linge avant l'ouverture d'au moins une porte de machine à laver - Google Patents

Procédé de controle du caractère aseptique du linge avant l'ouverture d'au moins une porte de machine à laver Download PDF

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Publication number
EP1096054B1
EP1096054B1 EP00402937A EP00402937A EP1096054B1 EP 1096054 B1 EP1096054 B1 EP 1096054B1 EP 00402937 A EP00402937 A EP 00402937A EP 00402937 A EP00402937 A EP 00402937A EP 1096054 B1 EP1096054 B1 EP 1096054B1
Authority
EP
European Patent Office
Prior art keywords
tank
door
machine
water
opening
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.)
Expired - Lifetime
Application number
EP00402937A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1096054A1 (fr
Inventor
André Maziere
William Drot
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.)
Electrolux Laundry Systems France SNC
Original Assignee
Electrolux Systemes de Blanchisserie SNC
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 Electrolux Systemes de Blanchisserie SNC filed Critical Electrolux Systemes de Blanchisserie SNC
Publication of EP1096054A1 publication Critical patent/EP1096054A1/fr
Application granted granted Critical
Publication of EP1096054B1 publication Critical patent/EP1096054B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D06F95/00—Laundry systems or arrangements of apparatus or machines; Mobile laundries 
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • 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
    • D06F2103/16—Washing liquid 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
    • D06F2103/18—Washing liquid 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • D06F2103/22—Content of detergent or additives
    • 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
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps

Definitions

  • the invention relates to a method designed for check the aseptic character of the linen contained in a washing machine, before opening at least one door of this machine opening into a clean room.
  • the invention is particularly applicable to machines washing clothes used in laundries industrial or semi-industrial ensuring processing of linen from establishments hospital.
  • Such machines are generally equipped with at least one door opening into a room contaminated and used to load dirty laundry into the machine, and at least one door opening into a clean room used to unload the laundry when the washing is finished.
  • the invention can however be applied to other types of machines washing clothes, and in particular in machines equipped from a single door, when such machines are implemented in such a way that the laundry is unloaded in a clean room.
  • linen In industrial laundries intended for the treatment of the linen coming from hospitals, linen is generally washed in washing machines integrated in a partition separating a contaminated room from a room clean.
  • the machine then has at least one door opening into the contaminated room and used for loading dirty laundry and at least one door opening into the clean room and used for unloading of washed laundry, see for example patent DE-A-3,406,911 or patent FR-A-1,435,391.
  • the opening of the door (s) of the machine opening into the clean room is usually ordered by order opening delivered by a PLC ensuring the machine work, when the cycle of wash-rinse-spin is complete.
  • the cycle actually executed by the machine is defective and does not guarantee the complete destruction of pathogenic bacteria present in the laundry.
  • the bins containing the detergents may be empty or the heating system of the machine may be down.
  • the cycle of wash-rinse-spin is then ordered normally by the machine and an order to open the door (s) opening into the clean room are issued in end of cycle.
  • the subject of the invention is precisely a process for controlling aseptic character laundry before opening the door (s) of a washing machine, opening into a clean room, so not to authorize this opening until we are not sure that the aseptic conditions of the laundry are not carried out.
  • the process according to the invention guarantees a total destruction of pathogenic bacteria initially present in the laundry. Because authorization to open the door is only given when these various checks have been carried out with success, so it becomes possible to guarantee a perfect hygiene of the laundry when the door of the washing machine is open.
  • the control of the arrival of said minimum quantity of water is followed by a control of the rotation of the drum the machine. It is thus certain that the mixing of the bath consisting of the mixture of water and products detergents is insured.
  • the washing machine is integrated in a watertight partition separating a contaminated room from clean room and has at least one door opening into each of these rooms. We lock then in a closed state each door opening into clean room until signal is issued opening authorization.
  • checking the presence of detergents can be ensured either by measuring the pH of the bath contained in the tank, either by measuring the hydrotimetric titer of this bath, ie still in controlling the arrival of detergents in the tank.
  • the bath reaches a minimum temperature of at least about 60 ° C.
  • the opening signal is advantageously transmitted from the door approximately 20 minutes after obtaining this minimum temperature.
  • the control method according to the invention applies to a washing machine with minus a door likely to open into a room clean when the laundry is finished.
  • the washing machine designated generally by reference 10
  • the washing machine is a machine large capacity with loading door 12 by which dirty linen is introduced into the machine and an unloading door 14 through which the washed linen is removed from the machine.
  • the number of doors 12 and 14 can however be different, without go beyond the scope of the invention
  • the washing machine 10 is integrated in a watertight partition 16, separating a contaminated room 18 a clean room 20.
  • the door 12 opens into the contaminated room 18, while door 14 opens in the clean room 20.
  • the washing machine laundry 10 includes a stationary tub 22 and a drum perforated 24 likely to rotate inside the tank 22, in either direction, under the action of a motor (not shown).
  • machine 10 In order to control the execution of a cycle complete wash-rinse-spin, machine 10 is equipped with a programmable controller 26 which controls the different functions necessary for the execution of this cycle (injection of water and detergents, drum rotation, emptying, etc.).
  • a pipe 28 for injecting water into the tank 22, as well as a product injection pipe 30 detergents in said tank we also represented schematically at 32 a locking mechanism of the discharge door 14, opening into the room clean 20.
  • This locking mechanism 32 occupies normally a locked state as long as an order of unlocking is not issued by the PLC programmable 26, at the end of the washing-rinsing-spin.
  • This unlock order is executed by a control system of unlocking 34 associated with the locking mechanism 32.
  • this order of unlocking can only be executed by the unlocking command 34 only on condition that a authorization to open door 14 signal previously issued by a control unit 36.
  • control unit 36 is connected to a number of detectors in order to sequentially control the obtaining of a certain number of conditions essential for destruction pathogenic bacteria likely to be present in the laundry previously introduced into the machine.
  • the first control carried out by the control unit 36 consists of a control of the arrival of a minimum quantity of water in the tank 22 of the machine 10. In other words, we check that the tank 22 is correctly filled of water before the drum 24 begins to rotate and detergents are not injected into the tank.
  • the control unit 36 proceeds at the next check.
  • the next check is not executed and the authorization to open door 14 does not will never be given.
  • a display and / or a alarm are advantageously activated to inform the staff of the existence of an anomaly. The same effects are obtained if any of the conditions imposed during subsequent inspections by the control unit 36 is not respected. Laundry unwashed or improperly washed is then evacuated into the contaminated room 18 through door 12 and the defective part of the machine 10 is repaired.
  • control unit 36 When the control unit 36 detects the arrival of the minimum quantity of water desired in the tank 22, it performs the following control. In the preferred embodiment described, this control consists in controlling the rotation of the drum 24 of the machine. More specifically, the control unit 36 check that the drum 24 turns well at the speed desired, capable of ensuring efficient mixing of the bath contained in the tank.
  • drum rotation is optional. Indeed, the staff can easily detect non rotation of the drum without the need for a special control. In addition, the non-rotation of the drum in the absence of other failures is extremely rare.
  • control unit 36 goes to step next, during which we check the presence detergent in tank 22 of the machine.
  • This control is essential because the presence of the products detergents is essential for obtaining laundry aseptic conditions desired.
  • the unit of check 36 performs the following check.
  • This control consists of a verification that a temperature is reached by the bath then contained in the tank 22 of the machine.
  • control unit 36 triggers a system of time counting, so as to emit a signal authorization to open the discharge door 14 when a predetermined time interval has elapsed after the minimum temperature indicated previously been reached.
  • this time interval predetermined can be about 20 minutes.
  • the authorization signal to open the door 14 delivered by the control unit 36 is transmitted to the unlocking control system 34. Therefore, as soon as the PLC 26 controlling the washing machine 10 emits a signal door 14 open command, this is automatically opened by the control system unlocking 34.
  • control unit 36 which concerns the arrival a minimum quantity of water in the tank 22 of the machine, can be performed using any type of sensors capable of emitting a representative signal of this amount of water, such as a flow meter 38 implanted in the water injection pipe 28, a sensor able to measure the volume or mass of water injected into the tank 22, or a detector capable of measuring the water level in this tank.
  • the signal delivered by the sensor is transmitted to the control unit 36, in which it is compared to a predetermined threshold.
  • this control can in particular be carried out by means of a speed implanted in the tank 22 or on the mechanism who controls the rotation.
  • the signal delivered by this detector is also transmitted to the control unit 36, in which it is compared to a threshold predetermined.
  • control of the presence of detergents in tank 22 of the machine is advantageously carried out by means of the signal delivered by a sensor placed in the tank 22 and capable of measuring the pH of the bath. So, for example, measuring a pH greater than or equal to 9 can be considered revealing the introduction of a sufficient amount of detergents in the tank.
  • control unit 36 it is also possible to proceed of this control by means of a sensor placed in the tank 22 and able to measure alkalinity or titer hydrotimetric Th of the bath. Another solution is to control the passage of detergents in the conduit 30 through which these products are injected into the tank 22. In all cases, the signal delivered by the sensor is transmitted to control unit 36, where it is compared to a predetermined threshold.
  • the bath temperature we uses one or more temperature sensors implanted in the tank 10. This probe can be that which usually equips machine 10 or a probe additional independent of this existing probe. Again, the signal from the probe is transmitted by the control unit 36, which compares it to a threshold predetermined.
  • counting time from the moment where the bath reaches a minimum temperature can be performed using any appropriate means such as timer or clock built into the control unit 36 or outside thereof. Any other system of time counting can however be used without depart from the scope of the invention.
  • the control unit 36 emits the door opening authorization signal unloading 14.
  • control unit 36 can also be used to know the operating history of the machine 10. Indeed, the results of the different checks carried out by this unit 36 during the times can be stored and / or transmitted in real time to a device such as a printer connected to said control unit.
  • the process of control according to the invention is not limited to a machine with several doors opening into separate rooms. Indeed, this process can also apply to single-door machines, in particular when such machines are integrated into facilities for opening the door in a contaminated room during loading and in a clean room when unloading. In this case single door of the washing machine can be fitted with a back-up system for ordering exceptionally opening only in the room contaminated, when the authorization signal said door was not opened by the control unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP00402937A 1999-10-27 2000-10-24 Procédé de controle du caractère aseptique du linge avant l'ouverture d'au moins une porte de machine à laver Expired - Lifetime EP1096054B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9913417 1999-10-27
FR9913417A FR2800397B1 (fr) 1999-10-27 1999-10-27 Procede de controle du caractere aseptique du linge avant l'ouverture d'au moins une porte de machine a laver

Publications (2)

Publication Number Publication Date
EP1096054A1 EP1096054A1 (fr) 2001-05-02
EP1096054B1 true EP1096054B1 (fr) 2003-07-16

Family

ID=9551401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00402937A Expired - Lifetime EP1096054B1 (fr) 1999-10-27 2000-10-24 Procédé de controle du caractère aseptique du linge avant l'ouverture d'au moins une porte de machine à laver

Country Status (10)

Country Link
US (1) US6523204B1 (cs)
EP (1) EP1096054B1 (cs)
AT (1) ATE245221T1 (cs)
CZ (1) CZ302006B6 (cs)
DE (1) DE60003879T2 (cs)
DK (1) DK1096054T3 (cs)
ES (1) ES2202020T3 (cs)
FR (1) FR2800397B1 (cs)
SI (1) SI20380A (cs)
TR (1) TR200003031A3 (cs)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6866426B1 (en) 2000-04-07 2005-03-15 Shipley Company, L.L.C. Open face optical fiber array for coupling to integrated optic waveguides and optoelectronic submounts
DE10154982A1 (de) * 2001-11-01 2003-05-22 Kannegiesser H Gmbh Co Verfahren zum Behandeln, insbesondere Desinfizieren von Wäschestücken
US9091017B2 (en) * 2012-01-17 2015-07-28 Co2Nexus, Inc. Barrier densified fluid cleaning system
DE102016208887A1 (de) * 2016-05-23 2017-11-23 Gottlob Stahl Wäschereimaschinenbau GmbH Waschvorrichtung und Verfahren zum Reinhalten eines geschlossenen Reinraums
CN113359899B (zh) * 2021-06-26 2022-06-24 左点实业（湖北）有限公司 一种用于泡脚桶的温控方法及装置

Family Cites Families (19)

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GB1088912A (en) * 1964-08-03 1967-10-25 Pellerin Corp Milnor Improvements in laundering plants
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US3896827A (en) * 1973-08-31 1975-07-29 Norman R Robinson Dish machine monitoring of time, temperature, alkalinity, and pressure parameters
US4067691A (en) * 1976-04-16 1978-01-10 Mercy Hospital And Medical Center Sterilizing system and automatic control therefor
US4509543A (en) * 1983-09-12 1985-04-09 Beta Technology, Inc. Industrial dishwasher monitor/controller with speech capability
DE3406919A1 (de) * 1984-02-25 1985-09-05 Miele & Cie GmbH & Co, 4830 Gütersloh Desinfektionswaschmaschine mit reiner und unreiner seite
US4711851A (en) * 1984-05-21 1987-12-08 State University Of New York Test apparatus for determining a metabolic characteristic of microorganisms
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JPH0515685A (ja) * 1991-07-11 1993-01-26 Sharp Corp 洗濯機の制御装置
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IT1268006B1 (it) * 1994-02-03 1997-02-20 Merloni Elettrodomestici Spa Macchina di lavaggio con controllo dell'impiego di detersivo, e relativo metodo di controllo.
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Also Published As

Publication number Publication date
ATE245221T1 (de) 2003-08-15
DE60003879T2 (de) 2004-04-22
CZ20003955A3 (cs) 2001-09-12
FR2800397A1 (fr) 2001-05-04
DK1096054T3 (da) 2003-10-20
TR200003031A2 (tr) 2001-05-21
ES2202020T3 (es) 2004-04-01
DE60003879D1 (de) 2003-08-21
TR200003031A3 (tr) 2001-05-21
CZ302006B6 (cs) 2010-09-01
EP1096054A1 (fr) 2001-05-02
FR2800397B1 (fr) 2002-01-18
SI20380A (sl) 2001-04-30
US6523204B1 (en) 2003-02-25

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