EP4074878B1 - Verfahren zum maschinellen waschen von textilien - Google Patents

Verfahren zum maschinellen waschen von textilien Download PDF

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Publication number
EP4074878B1
EP4074878B1 EP22168078.8A EP22168078A EP4074878B1 EP 4074878 B1 EP4074878 B1 EP 4074878B1 EP 22168078 A EP22168078 A EP 22168078A EP 4074878 B1 EP4074878 B1 EP 4074878B1
Authority
EP
European Patent Office
Prior art keywords
washing
textiles
washing process
dosing
sample
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.)
Active
Application number
EP22168078.8A
Other languages
English (en)
French (fr)
Other versions
EP4074878A1 (de
EP4074878C0 (de
Inventor
Juha JÄMSÄ
Jari NOPONEN
Mika RAHUNEN
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.)
Christeyns Nordic Oy AB
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Christeyns Nordic Oy AB
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Publication of EP4074878A1 publication Critical patent/EP4074878A1/de
Application granted granted Critical
Publication of EP4074878B1 publication Critical patent/EP4074878B1/de
Publication of EP4074878C0 publication Critical patent/EP4074878C0/de
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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or 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
    • 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 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/37—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of metering of detergents 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
    • 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 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • 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 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/52—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/57—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of metering of detergents 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • 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
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • 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
    • 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
    • D06F31/00—Washing installations comprising an assembly of several washing machines or washing units, e.g. continuous flow assemblies
    • D06F31/005—Washing installations comprising an assembly of several washing machines or washing units, e.g. continuous flow assemblies consisting of one or more rotating drums through which the laundry passes in a continuous flow
    • 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 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/36—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of washing

Definitions

  • the present invention relates to machine-washing of textiles preferably in industrial scale.
  • the present invention relates to a method for machine-washing of textiles, in which method the existence of disinfectant in the washing process can be confirmed.
  • Disinfectants are typically used in the machine-washing processes of various textiles, such as textiles from food industry, healthcare and hospitality, for example.
  • various textiles such as textiles from food industry, healthcare and hospitality, for example.
  • disinfectant in the machine-washing processes utilized in automated laundry systems. This is mainly due to the continuously changing and the laundry related properties of the water in the washing process.
  • the disinfectant used in the washing processes of automated laundry systems are often conveyed to the actual washing process and machine(s) from a distance, such as from a separate room wherein the disinfectant is stored. Therefore, even though it is easily confirmable that the disinfectant has been sent to the washing process and machine(s), the actual introduction of the disinfectant to the washing process can still fail due to various reasons, such as pipe blockage, leakage or breakage, for example. Further, the continuously increasing requirements for washed and simultaneously disinfected textiles require more concrete proof of the actual disinfection of the textiles.
  • Publication WO 2012/026821 A1 presenting the closest prior art, discloses a method and a device for industrial washing of textile, wherein at least one process parameter related to process water is detected during at least two washing steps.
  • Publication EP 3 219 842 A1 discloses a method for wet treating of laundry, wherein predetermined quantity of at least one treatment additive is added to the laundry at the beginning of the wet treatment and the current content of at least one treatment additive is measured at least once.
  • Publication WO 2015/010143 A1 discloses a measuring apparatus for recording at least one parameter of a liquid, in particular a cleaning or disinfectant liquid.
  • the present invention provides a novel solution for confirming the introduction and existence of a disinfectant in the machine-washing process in a reliable way.
  • either the electrical conductivity or the pH value of the washing liquid is measured before the dosing of a disinfectant and after the dosing of the disinfectant, so that the differences in these two measurement values can be used to confirm that the disinfectant has been properly introduced and dosed in the washing process. Since many other factors, such as the water itself, and dirt on textiles and washing agent(s) in the water, affects to the electrical conductivity and pH value of the washing liquid, two measurements are required for reliable confirmation.
  • the textiles are washed in a washing machine with water and washing agent(s), and at least one disinfecting agent is dosed in the washing process for disinfecting the textiles in the washing process, wherein the electrical conductivity or the pH value of the washing liquid, which comprises at least water and washing agent(s), is measured during the washing process first before dosing of the disinfecting agent to the washing process and then second time after dosing of the disinfecting agent, and the two measurement values are compared to each other to confirm successful dosing of the disinfecting agent to the washing process.
  • the dosing of the disinfecting agent and the measurements are done after washing of the textiles has started. This way dirt can be removed from the textiles, so that it cannot affect the disinfection of the textiles. However, it is to be noted that the dirt washed from the textiles remains in the washing liquid, thus affecting washing liquid's pH and electrical conductivity, for example.
  • temperature of the washing liquid and disinfection time are also measured from the washing process to confirm successful disinfection of the textiles in the washing process.
  • the successful disinfection of the textiles is guaranteed with a predefined time period and temperature of the washing liquid together with the confirmed dosing of the disinfecting agent.
  • a small amount of the washing liquid is taken twice from the washing machine, once before and then after the dosing of the disinfecting agent, and preferably conveyed to a separate measuring vessel for the measurements of the pH value or the electrical conductivity.
  • the method of the present invention can be implemented both with a continuous batch washer (CBW) and with an industrial single batch washing machine, preferably with a plurality of these single batch washing machines.
  • FIG 1 shows a continuous batch washer (CBW) 1, which is an industrial washing machine used to handle large amounts of laundry as a continuous washing process. This kind of washing machine can typically handle up to about 10.000 kg of laundry in a single shift.
  • CBW continuous batch washer
  • the continuous batch washer 1 in this embodiment comprises a feed chute 2 via which laundry batches of defined weight are fed into the machine.
  • the washing section of the washer 1 comprises a plurality of drums 3a-3k, through which the laundry batch of textiles is automatically moved together with the washing liquid.
  • the laundry batch is mixed with water and washing agents, which washing agents are pumped and dosed from container 4a and/or 4b.
  • the actual washing of the laundry batch continues through drums 3a-3c.
  • drum 3d When the laundry reaches drum 3d, disinfecting agent is dosed and mixed to the washing liquid in order to disinfect the textiles of the laundry batch.
  • the disinfecting process is continued with drums 3d-3g predefined time at predefined temperature.
  • the laundry is rinsed, and in the drum 3j neutralizing agents are pumped and dosed to the drum from container 6a and/or 6b and mixed with the laundry to neutralize any residues of the washing agents and disinfecting agents left in the laundry.
  • press of centrifuge 3k the water is removed from the laundry.
  • washing liquid samples are taken with a valve 7a, which is controlled to allow small amount of the washing liquid to exit the drum 3d to a sample measuring vessel 8.
  • a sensor 9 which measures the electrical conductivity or the pH value of the sample.
  • the sensor 9 comprises a measuring head extending to the washing liquid sample in the measuring vessel 8.
  • the sample in the measuring vessel 8 is changed by opening the valve 7a at a suitable time for a suitable time period for new sample measurement. At certain measurement amounts or time intervals the measuring vessel 8 together with the measuring head of the sensor 9 is cleaned with fresh water vial valve 7b.
  • the measurement is done twice for two different samples, first to a first sample of the washing liquid taken before dosing the disinfecting agent, and second time to a second sample of the washing liquid after dosing the disinfecting agent.
  • Figure 2 shows schematically on alternative embodiment of the invention, wherein batches of laundry are washed in a single industrial washing machine 11a-11f, which machines there normally are plurality of in an industrial laundry.
  • Each of the machines 11a-11f are equipped with a conduit leading to a sample measuring vessel 15, to which a sample of the washing liquid from the washing machine can be conveyed via the conduit and by operating a valve 17.
  • Each of the sample measurement vessels 15 are equipped with a suitable sensor 16 for measuring electrical conductivity or pH value of the sample, which sensor comprises a measuring head extending to the washing liquid sample in the measurement vessel.
  • the sample in the measuring vessel 15 is changed by opening the valve 17 at a suitable time for a suitable time period for a new sample measurement. At certain measurement amounts or time intervals the measuring vessel 15 together with the measuring head of the sensor 16 is cleaned with fresh water vial valve 18.
  • fist sample of the washing liquid is taken just before dosing the disinfecting agent into the machine 11a-11f, and its electrical conductivity or pH value is measured.
  • Second sample is taken after the disinfecting agent is added to the machine 11a-11f and mixed to the washing liquid, and its electrical conductivity or pH value is measured.
  • the dosing of the disinfectant can be done again, or the measurement redone, manually for example, before the washing process is allowed to proceed. Alternatively, the whole washing process can be started again.
  • the measurement of electrical conductivity or pH value is done to a separate sample of the washing liquid taken from the washing machines.
  • the present invention may also be implemented with a measurement sensor located inside the washing machine measuring the washing liquid inside the machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Detergent Compositions (AREA)

Claims (4)

  1. Verfahren zum Maschinenwaschen von Textilien, wobei bei dem Verfahren die Textilien in einer Waschmaschine (1; 11a-11f) mit Wasser und einem Waschmittel oder Waschmitteln gewaschen werden, und bei dem Verfahren mindestens ein Desinfektionsmittel zum Desinfizieren der Textilien in dem Waschprozess zudosiert wird, dadurch gekennzeichnet, dass die elektrische Leitfähigkeit oder der pH-Wert der Waschflüssigkeit, die mindestens Wasser und das Waschmittel oder die Waschmittel umfasst, während des Waschprozesses zunächst vor der Dosierung des Desinfektionsmittels zu dem Waschprozess und dann ein zweites Mal nach der Dosierung des Desinfektionsmittels gemessen wird und die beiden Messwerte miteinander verglichen werden, um eine erfolgreiche Dosierung des Desinfektionsmittels zu dem Waschprozess zu bestätigen, und wobei die erhöhte elektrische Leitfähigkeit der Waschflüssigkeit oder der verringerte pH-Wert der Waschflüssigkeit zwischen den beiden Messungen die erfolgreiche Dosierung des Desinfektionsmittels zu dem Waschprozess anzeigen.
  2. Verfahren nach Anspruch 1, wobei die Dosierung des Desinfektionsmittels und die Messungen nach Beginn des Waschens der Textilien erfolgen.
  3. Verfahren nach Anspruch 1 oder 2, wobei auch die Temperatur der Waschflüssigkeit und die Desinfektionszeit aus dem Waschprozess gemessen werden, um die erfolgreiche Desinfektion der Textilien in dem Waschprozess zu bestätigen.
  4. Verfahren nach einem der Ansprüche 1 - 3, wobei Proben aus der Waschflüssigkeit in dem Waschprozess für die Messungen entnommen werden, die mit einer Messvorrichtung (8, 9; 15, 16) gemessen werden.
EP22168078.8A 2021-04-16 2022-04-13 Verfahren zum maschinellen waschen von textilien Active EP4074878B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20215452A FI130565B (en) 2021-04-16 2021-04-16 Method and system for machine washing textiles

Publications (3)

Publication Number Publication Date
EP4074878A1 EP4074878A1 (de) 2022-10-19
EP4074878B1 true EP4074878B1 (de) 2024-05-22
EP4074878C0 EP4074878C0 (de) 2024-05-22

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2005282C2 (nl) * 2010-08-27 2012-02-28 Christeyns N V Werkwijze en inrichting voor het wassen van textiel.
AT514640B1 (de) * 2013-07-22 2015-05-15 Hagleitner Hans Georg Messvorrichtung zur Erfassung wenigstens eines Parameters einer Flüssigkeit
DE102016003200A1 (de) * 2016-03-17 2017-09-21 Herbert Kannegiesser Gmbh Verfahren zur Nassbehandlung von Wäsche

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Publication number Publication date
EP4074878A1 (de) 2022-10-19
FI130565B (en) 2023-11-21
EP4074878C0 (de) 2024-05-22
FI20215452A1 (en) 2022-10-17

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