FI20215452A1 - Method and system for machine washing of textiles - Google Patents

Method and system for machine washing of textiles Download PDF

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Publication number
FI20215452A1
FI20215452A1 FI20215452A FI20215452A FI20215452A1 FI 20215452 A1 FI20215452 A1 FI 20215452A1 FI 20215452 A FI20215452 A FI 20215452A FI 20215452 A FI20215452 A FI 20215452A FI 20215452 A1 FI20215452 A1 FI 20215452A1
Authority
FI
Finland
Prior art keywords
washing
textiles
dosing
machine
agent
Prior art date
Application number
FI20215452A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI130565B (en
Inventor
Juha Jämsä
Jari Noponen
Mika Rahunen
Original Assignee
Oy Christeyns Nordic Ab
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 Oy Christeyns Nordic Ab filed Critical Oy Christeyns Nordic Ab
Priority to FI20215452A priority Critical patent/FI130565B/en
Priority to EP22168078.8A priority patent/EP4074878B1/en
Publication of FI20215452A1 publication Critical patent/FI20215452A1/en
Application granted granted Critical
Publication of FI130565B publication Critical patent/FI130565B/en

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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
    • 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
    • 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 
    • D06F33/50—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
    • 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

Landscapes

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

Abstract

Menetelmä tekstiilien konepesuun, jossa menetelmässä tekstiilit pestään pesu-koneessa (1; 11a-11f) vedellä ja pesuaineella(-aineilla), ja jossa menetelmässä ainakin yhtä desinfiointiainetta annostellaan pesuprosessiin pesuprosessissa olevien tekstiilien desinfioimiseksi, tunnettu siitä, että pesunesteen, joka käsittää ainakin vettä ja pesuainetta(-aineita), sähkönjohtavuus tai pH arvo mitataan pesuprosessissa ensiksi ennen desinfiointiaineen annostelua pesuprosessiin ja seuraavaksi toisen kerran desinfiointiaineen annostelun jälkeen, ja näitä kahta mitattua arvoa verrataan toisiinsa onnistuneen desinfiointiaineen annostelun pesuprosessiin varmistamiseksi.

Description

METHOD AND SYSTEM FOR MACHINE WASHING OF TEXTILES
The present relates to machine-washing of textiles preferably in industrial scale.
More precisely the present invention relates to a method and system 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 tex- tiles, such as textiles from food industry, healthcare and hospitality, for example.
However, thus far there have not been a reliable way to confirm the proper introduc- tion, and thus the effect, of 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 sim- ultaneously disinfected textiles require more concrete proof of the actual disinfection of the textiles.
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. In the solution of the invention either the electrical conductivity or the pH value of the wash- = ing liquid is measured before the dosing of a disinfectant and after the dosing of the
S 25 — disinfectant, so that the differences in these two measurement values can be used x to confirm that the disinfectant has been properly introduced and dosed in the wash- © ing 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.
N
= 30 In the method of the invention for machine-washing of textiles the textiles are
N washed in a washing machine with water and washing agent(s), and at least one
N 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 liguid, 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 measure- ment values are compared to each other to confirm successful dosing of the disin- fecting agent to the washing process.
In an embodiment of the method of the invention 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.
In an embodiment of the method of the invention increased electrical conductivity of the washing liquid, or decreased pH value of the washing liquid, between the two measurements indicate successful dosing of disinfecting agent to the washing pro- cess.
In an embodiment of the method of the invention temperature of the washing liquid and disinfection time are also measured from the washing process to confirm suc- cessful disinfection of the textiles in the washing process. In this embodiment 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.
In an embodiment of the method of the invention separate samples from the wash- ing liquid in the washing process are taken for the measurements, which samples are measured with a measuring device. In this embodiment a small amount of the = washing liguid is taken twice from the washing machine, once before and then after < 25 the dosing of the disinfecting agent, and preferably conveyed to a separate meas- x uring vessel for the measurements of the pH value or the electrical conductivity. = The present invention also provides a system for machine-washing of textiles, which
E system comprises at least one washing machine for washing textiles with water and
N washing agent(s), and devices for dosing disinfecting agent in the washing liquid for > 30 disinfecting the textiles, wherein the system further comprises devices for measur-
N ing the electrical conductivity or the pH value of the washing liguid before and after
N dosing of the disinfecting agent, and devices for comparing the two measurement values to define a change in the measurement values to confirm successful dosing of the disinfecting agent to the washing process.
In an embodiment of the system the washing machine is a continuous batch washer (CBW). In an alternative embodiment of the system the washing machine is indus- trial single batch washing machine, wherein the system preferably comprises a plu- rality of these washing machines.
In an embodiment of the system of the invention the system comprises devices for taking samples from the washing liquid inside the washing machine for the meas- urements, which devices comprise a sample measuring vessel with a measuring sensor. In this embodiment the system may also comprise devices for periodical cleaning of the sample measuring vessel and the measuring sensor.
More precisely the features defining a method in accordance with the present inven- tion are presented in claim 1, and the features defining a system in accordance with the invention are presented in claim 6. Dependent claims present advantageous features and embodiments of the invention.
Exemplifying embodiment of the invention and its advantages are explained in — greater detail below in the sense of example and with reference to accompanying drawings, where
Figure 1 shows schematically an embodiment of the invention, and
Figure 2 shows schematically an alternative embodiment of the invention.
Figure 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.
N
< The continuous batch washer 1 in this embodiment comprises a feed chute 2 via x which laundry batches of defined weight are fed into the machine. The washing sec- © 25 — tion of the washer 1 comprises a plurality of drums 3a-3k, through which the laundry
I batch of textiles is automatically moved together with the washing liquid. a a
N In the first drum 3a, 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
N washing of the laundry batch continues through drums 3a-3c.
N
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.
In the drums 3h-3j 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. In press of centrifuge 3k the water is removed from the laundry.
From the drum 3d washing liquid samples are taken with a valve 7a, which is con- trolled to allow small amount of the washing liquid to exit the drum 3d to a sample measuring vessel 8. In the sample measuring vessel 8 is 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.
When the two measurement values are compared, if measured electrical conduc- tivity indicate increase from the first sample to the second sample, or if measured pH value indicate decrease from the first sample to the second sample, the dosing of the disinfecting agent to the washing process has been successful, and the wash- = ing process can continue.
O
5 25 If, however, there is no change between the measured values of the first and second 2 sample, or the change is too small, this indicates that there are problems with the
T disinfecting process. Then the laundry batch in guest will be returned to the washing
E process for a new round after it has exited the washer 1, or a second measurement
N can be made later in the washing process, manually for example, to confirm the > 30 problem.
S
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.
During washing process, to each of the machines 11a-11f is pumped and dosed the 5 required washing agents from containers 12 and 13 at specific times in the washing process of the specific machine. Similarly, after the washing of the laundry batch of textiles has proceeded at a specific time in a specific machine 11a-11f, to the wash- ing machine is pumped and dosed disinfecting agent from container 14.
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 meas- uring 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.
In this embodiment, 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. = Similarly than in embodiment of figure 1, when the two measurement values are < 25 compared, if measured electrical conductivity indicate increase from the first sample x to the second sample, or if measured pH value indicate decrease from the first sam- © ple to the second sample, the dosing of the disinfecting agent to the washing pro- cess has been successful, and the washing process can continue. a a
N If, however, there is no change between the measured values of the first and second > 30 sample, or the change is too small, this indicates that there are problems with the
N disinfecting process. Then the dosing of the disinfectant can be done again, or the
N measurement redone, manually for example, before the washing process is allowed to proceed. Alternatively, the whole washing process can be started again.
In the above discussed embodiments, 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, however, may also be implemented with a meas- urement sensor located inside the washing machine measuring the washing liquid inside the machine.
The specific exemplifying embodiment of the invention shown in figures and dis- cussed above should not be construed as limiting. A person skilled in the art can amend and modify the embodiment described in many evident ways within the scope of the attached claims. Thus, the invention is not limited merely to the em- bodiment described above.
N
O
N
<+ <Q
O
I a a
N
LO
<
LO
N
O
N

Claims (8)

Claims
1. Method for machine-washing of textiles, in which method the textiles are washed in washing machine (1; 11a-11f) with water and washing agent(s), and in which method at least one disinfecting agent is dosed in the washing process for disinfecting the textiles in the washing process, characterized in that 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.
2. Method according to claim 1, wherein the dosing of the disinfecting agent and the measurements are done after washing of the textiles has started.
3. Method according to claim 1 or 2, wherein the increased electrical conductivity of the washing liquid, or decreased pH value of the washing liquid, between the two measurements indicate successful dosing of disinfecting agent to the washing pro- cess.
4. Method according to any of claims 1-3, wherein the 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.
5. Method according to any of claims 1-4, wherein samples from the washing liquid in the washing process are taken for the measurements, which samples are measured with a measuring device (8, 9; 15, 16).
N 6. System for machine-washing of textiles, which system comprises at least one N washing machine (1; 11a-11f) for washing textiles with water and washing agent(s), S 25 and devices (5; 14) for dosing disinfecting agent in the washing liquid for disinfecting 2 the textiles, characterized in that the system comprises devices (9; 16) for meas- z uring the electrical conductivity or the pH value of the washing liquid before and after a dosing of the disinfecting agent, and devices for comparing the two measurement 2 values to define a change in the measurement values to confirm successful dosing O s . . N 30 of the disinfecting agent to the washing process. N
7. — System according to claim 6, wherein the system comprises devices (7a, 8, 9; 15, 16, 17) for taking samples from the washing liquid inside the washing machine (1; 11a-11f) for the measurements, which devices comprise a sample measuring vessel (8; 15) with a measuring sensor (9; 16).
8. System according to claim 7, wherein the system comprises devices (7b; 18) for periodical cleaning of the sample measuring vessel (8; 15) and the measuring sensor (9; 16). N O N <+ <Q O I = N LO < LO N O N
FI20215452A 2021-04-16 2021-04-16 Method and system for machine washing of textiles FI130565B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI20215452A FI130565B (en) 2021-04-16 2021-04-16 Method and system for machine washing of textiles
EP22168078.8A EP4074878B1 (en) 2021-04-16 2022-04-13 Method for machine washing of textiles

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 of textiles

Publications (2)

Publication Number Publication Date
FI20215452A1 true FI20215452A1 (en) 2022-10-17
FI130565B FI130565B (en) 2023-11-21

Family

ID=81308288

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

Country Status (2)

Country Link
EP (1) EP4074878B1 (en)
FI (1) FI130565B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2005282C2 (en) * 2010-08-27 2012-02-28 Christeyns N V METHOD AND DEVICE FOR WASHING TEXTILE.
AT514640B1 (en) * 2013-07-22 2015-05-15 Hagleitner Hans Georg Measuring device for detecting at least one parameter of a liquid
DE102016003200A1 (en) * 2016-03-17 2017-09-21 Herbert Kannegiesser Gmbh Process for the wet treatment of laundry

Also Published As

Publication number Publication date
FI130565B (en) 2023-11-21
EP4074878B1 (en) 2024-05-22
EP4074878A1 (en) 2022-10-19

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