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WO2025191460A1 - Method for detecting the presence of a washing additive in the washing water contained in a volume of a household appliance and household appliance configured to carry out said method - Google Patents

Method for detecting the presence of a washing additive in the washing water contained in a volume of a household appliance and household appliance configured to carry out said method

Info

Publication number
WO2025191460A1
WO2025191460A1 PCT/IB2025/052580 IB2025052580W WO2025191460A1 WO 2025191460 A1 WO2025191460 A1 WO 2025191460A1 IB 2025052580 W IB2025052580 W IB 2025052580W WO 2025191460 A1 WO2025191460 A1 WO 2025191460A1
Authority
WO
WIPO (PCT)
Prior art keywords
volume
heating
washing
sensor
household appliance
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.)
Pending
Application number
PCT/IB2025/052580
Other languages
French (fr)
Inventor
Valentino CASAGRANDE
Christian Ceotta
Antonio DE MOLINER
Stefano Zanella
Federico ZOPPAS
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.)
IRCA SpA Industria Resistenze Corazzate e Affini
Original Assignee
IRCA SpA Industria Resistenze Corazzate e Affini
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 IRCA SpA Industria Resistenze Corazzate e Affini filed Critical IRCA SpA Industria Resistenze Corazzate e Affini
Publication of WO2025191460A1 publication Critical patent/WO2025191460A1/en
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/02—Consumable products information, e.g. information on detergent, rinsing aid or salt; Dispensing device information, e.g. information on the type, e.g. detachable, or status of the device
    • A47L2401/026—Nature or type of the consumable product, e.g. information on detergent, e.g. 3-in-1 tablets, rinsing aid or salt
    • 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
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D06F34/24—Liquid temperature

Definitions

  • the present invention relates to the field of household appliances, in particular washing machines or dishwashers.
  • the invention relates to a method for detecting the presence of a washing additive in the washing water, and a household appliance configured to perform such method.
  • additives such as, for example, detergent, soap or fabric softener, to carry out the washing.
  • the need is therefore felt to detect the presence of a washing additive in the washing water of a dishwasher or a washing machine.
  • the present invention achieves at least one of such objects, as well as other objects which will become apparent in the light of the present description, by means of a method, according to claim 1 , for detecting the presence of at least one washing additive in the washing water contained in a volume of a household appliance, in particular a dishwasher or a washing machine, wherein said volume is defined by a compartment of the household appliance or by a pump of the household appliance;
  • - at least one temperature sensor adapted to measure, in particular directly or indirectly, the temperature in said volume; - an electronic control unit connected to said at least one sensor; wherein there are provided the steps of: a) heating the liquid in said volume by means of heating means; b) measuring, in particular directly or indirectly, the temperature in said volume by means of said at least one sensor; c) detecting, by means of the electronic control unit, the presence of washing additive in the washing water contained in said volume as a function of the trend over time of the temperature measured by means of said at least one sensor, while the liquid in said volume is heated by means of said heating means; wherein if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time, the presence of washing additive in the washing water is detected.
  • the invention also relates to a household appliance, according to claim 4, in particular a dishwasher or a washing machine, comprising
  • - heating means adapted to heat the liquid in said volume
  • At least one temperature sensor adapted to measure, in particular directly or indirectly, the temperature in said volume
  • an electronic control unit connected to said at least one sensor; wherein the electronic control unit is configured to detect the presence of additive in the washing water contained in said volume as a function of the trend over time of the temperature measured by means of said at least one sensor, while said heating means generate heat for heating the liquid in said volume; wherein the electronic control unit is configured so as to detect the presence of additive in the washing water if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time; wherein said volume is defined by a pump of the household appliance, in particular provided with said heating means; or wherein said volume is defined by a compartment of the household appliance.
  • the invention provides for using a temperature sensor to detect the presence of at least one washing additive.
  • a temperature sensor can be advantageously used since the heating time depends on the presence of a washing additive in the water.
  • the heating speed is lower with respect to the same amount of water without the additive, or, in other words, the heating time is longer when there is a washing additive in the water.
  • Washing additive means, in particular, an additive for washing in the field of household appliances such as dishwashers or washing machines.
  • a washing additive may be, in particular, a detergent and/or a fabric softener and/or a soap and/or a rinse aid.
  • the washing additive in particular, before being introduced into the washing water, may for example be a liquid or a powder.
  • FIG. 1 diagrammatically shows an example of household appliance according to the invention
  • FIG. 2 diagrammatically shows another example of household appliance according to the invention.
  • a device 1 , T comprising
  • At least one temperature sensor 4 adapted to measure, in particular directly or indirectly, the temperature in said volume 20;
  • an electronic control unit 5 connected to said at least one sensor 4; wherein there are provided the steps of: a) heating the liquid in said volume 20 by means of heating means 3, in particular of the household appliance 100, 100'; b) measuring, in particular directly or indirectly, the temperature in said volume 20 by means of said at least one sensor 4; c) detecting, by means of the electronic control unit 5, the presence of washing additive in the washing water contained in said volume 20 as a function of the trend over time of the temperature measured by means of said at least one sensor 4, while the liquid in said volume 20 is heated, in particular, by means of said heating means 3.
  • the liquid mentioned in step a) may be water, in particular without additive(s); or water with additive(s), for example an aqueous solution.
  • the method provides that, if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time, the presence of washing additive in the washing water is detected.
  • the method allows in particular to detect the presence of at least one washing additive in the washing water.
  • the method allows to detect the presence of at least one additive dissolved or dispersed in the washing water.
  • Said at least one additive may be, for example, a detergent and/or a fabric softener and/or a soap and/or a rinse aid.
  • the electronic control unit 5 is preferably configured to control the activation of said heating means 3 and/or to detect the activation of said heating means 3.
  • the heating means 3 are preferably electronically connected to the electronic control unit 5.
  • the method may also include the calculation, in particular by means of said electronic control unit 5, of the amount, in particular the mass, of water in said volume 20 as a function of the trend over time of the temperature measured by said at least one sensor 4; in particular while said heating means 3 generate heat for heating the liquid in said volume 20.
  • the sensor 4 may directly measure the temperature in the volume 20 in the case in which, for example, the sensor 4 is arranged inside said volume 20 (as shown in Figure 1 ).
  • the sensor 4 may indirectly measure the temperature in the volume 20 in the case in which, for example, the sensor 4 is arranged outside said volume 20.
  • an indirect measurement of the temperature in the volume 20 may be obtained, for example, in the case where the sensor 4 is arranged in contact with an outer surface delimiting said volume 20 (as shown in Figure 2), whereby the temperature inside the volume 20 may be derived or calculated, for example by means of the electronic control unit 5.
  • the senor 4 is a Negative Temperature Coefficient (NTC) sensor.
  • NTC Negative Temperature Coefficient
  • One or more sensors 4 may be used.
  • the invention also relates to a household appliance 100, 100', in particular a dishwasher or a washing machine, in particular configured to carry out the method according to the invention, comprising
  • At least one temperature sensor 4 adapted to measure, in particular directly or indirectly, the temperature in said volume 20;
  • an electronic control unit 5 connected to said at least one sensor 4; wherein the electronic control unit 5 is configured to detect the presence of additive in the washing water contained in said volume 20 as a function of the trend over time of the temperature measured by means of said at least one sensor 4, while said heating means 3 generate heat for heating the liquid in said volume 20.
  • the electronic control unit 5 is configured so as to detect the presence of additive in the washing water if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time.
  • Said volume 20 may for example be defined by a pump of the household appliance, in particular provided with said heating means 3.
  • said volume 20 may for example be defined by a compartment of the household appliance.
  • the liquid may exit from the volume 20 for example by means of an opening or outlet section 70.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

A method for detecting the presence of at least one additive in the washing water contained in a volume (20) of a household appliance, wherein a device (1, 1') is provided, comprising: - at least one temperature sensor (4) adapted to measure, in particular directly or indirectly, the temperature in said volume (20); - an electronic control unit (5) connected to said at least one sensor (4); wherein there are provided the steps of: a) heating the liquid in said volume (20); b) measuring, in particular directly or indirectly, the temperature in said volume (20) by means of said at least one sensor (4); c) detecting, by means of the electronic control unit (5), the presence of additive in the washing water contained in said volume (20) as a function of the trend over time of the temperature measured by means of said at least one sensor (4); wherein, if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time, the presence of additive in the washing water is detected.

Description

METHOD FOR DETECTING THE PRESENCE OF A WASHING ADDITIVE IN THE WASHING WATER CONTAINED IN A VOLUME OF A HOUSEHOLD APPLIANCE AND HOUSEHOLD
APPLIANCE CONFIGURED TO CARRY OUT SAID METHOD
Field of the invention
5 The present invention relates to the field of household appliances, in particular washing machines or dishwashers.
In particular, the invention relates to a method for detecting the presence of a washing additive in the washing water, and a household appliance configured to perform such method.
Background art
As it is known, in household appliances such as dishwashers or washing machines, one or more additives are used, such as, for example, detergent, soap or fabric softener, to carry out the washing.
In household appliances such as dishwashers or washing machines, it would be advantageous to detect the presence of a washing additive in the washing water, but to date there are no devices or methods capable of performing such function.
The need is therefore felt to detect the presence of a washing additive in the washing water of a dishwasher or a washing machine.
Summary of the invention
It is an object of the present invention to provide a method for detecting the presence of a washing additive in the washing water of a dishwasher or a washing machine.
The present invention achieves at least one of such objects, as well as other objects which will become apparent in the light of the present description, by means of a method, according to claim 1 , for detecting the presence of at least one washing additive in the washing water contained in a volume of a household appliance, in particular a dishwasher or a washing machine, wherein said volume is defined by a compartment of the household appliance or by a pump of the household appliance;
30 wherein a device is provided comprising
- at least one temperature sensor adapted to measure, in particular directly or indirectly, the temperature in said volume; - an electronic control unit connected to said at least one sensor; wherein there are provided the steps of: a) heating the liquid in said volume by means of heating means; b) measuring, in particular directly or indirectly, the temperature in said volume by means of said at least one sensor; c) detecting, by means of the electronic control unit, the presence of washing additive in the washing water contained in said volume as a function of the trend over time of the temperature measured by means of said at least one sensor, while the liquid in said volume is heated by means of said heating means; wherein if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time, the presence of washing additive in the washing water is detected.
The invention also relates to a household appliance, according to claim 4, in particular a dishwasher or a washing machine, comprising
- heating means adapted to heat the liquid in said volume;
- at least one temperature sensor adapted to measure, in particular directly or indirectly, the temperature in said volume;
- an electronic control unit connected to said at least one sensor; wherein the electronic control unit is configured to detect the presence of additive in the washing water contained in said volume as a function of the trend over time of the temperature measured by means of said at least one sensor, while said heating means generate heat for heating the liquid in said volume; wherein the electronic control unit is configured so as to detect the presence of additive in the washing water if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time; wherein said volume is defined by a pump of the household appliance, in particular provided with said heating means; or wherein said volume is defined by a compartment of the household appliance.
Advantageously, the invention provides for using a temperature sensor to detect the presence of at least one washing additive. Indeed, a temperature sensor can be advantageously used since the heating time depends on the presence of a washing additive in the water. In particular, if at least one washing additive is present in the water, the heating speed is lower with respect to the same amount of water without the additive, or, in other words, the heating time is longer when there is a washing additive in the water.
“Washing additive” means, in particular, an additive for washing in the field of household appliances such as dishwashers or washing machines. A washing additive may be, in particular, a detergent and/or a fabric softener and/or a soap and/or a rinse aid. The washing additive, in particular, before being introduced into the washing water, may for example be a liquid or a powder.
Further features and advantages of the invention will become more apparent in light of the detailed description of exemplary but non-exclusive embodiments.
The dependent claims describe particular embodiments of the invention.
Brief description of the drawings
The description of the invention refers to the accompanying drawings, which are provided by way of non-limiting example, in which:
Figure 1 diagrammatically shows an example of household appliance according to the invention;
Figure 2 diagrammatically shows another example of household appliance according to the invention.
The same elements or components have the same reference numerals.
Description of exemplary embodiments of the invention
With reference to the Figures, embodiments of a method for detecting the presence of a washing additive in the washing water contained in a volume 20 of a household appliance 100, 100', in particular a dishwasher or a washing machine, are described, wherein there is provided a device 1 , T comprising
- at least one temperature sensor 4 adapted to measure, in particular directly or indirectly, the temperature in said volume 20;
- an electronic control unit 5 connected to said at least one sensor 4; wherein there are provided the steps of: a) heating the liquid in said volume 20 by means of heating means 3, in particular of the household appliance 100, 100'; b) measuring, in particular directly or indirectly, the temperature in said volume 20 by means of said at least one sensor 4; c) detecting, by means of the electronic control unit 5, the presence of washing additive in the washing water contained in said volume 20 as a function of the trend over time of the temperature measured by means of said at least one sensor 4, while the liquid in said volume 20 is heated, in particular, by means of said heating means 3.
The liquid mentioned in step a) may be water, in particular without additive(s); or water with additive(s), for example an aqueous solution.
The method provides that, if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time, the presence of washing additive in the washing water is detected.
The method allows in particular to detect the presence of at least one washing additive in the washing water. In particular, the method allows to detect the presence of at least one additive dissolved or dispersed in the washing water.
Said at least one additive may be, for example, a detergent and/or a fabric softener and/or a soap and/or a rinse aid.
The electronic control unit 5 is preferably configured to control the activation of said heating means 3 and/or to detect the activation of said heating means 3. The heating means 3 are preferably electronically connected to the electronic control unit 5.
Optionally, the method may also include the calculation, in particular by means of said electronic control unit 5, of the amount, in particular the mass, of water in said volume 20 as a function of the trend over time of the temperature measured by said at least one sensor 4; in particular while said heating means 3 generate heat for heating the liquid in said volume 20.
The sensor 4 may directly measure the temperature in the volume 20 in the case in which, for example, the sensor 4 is arranged inside said volume 20 (as shown in Figure 1 ). The sensor 4 may indirectly measure the temperature in the volume 20 in the case in which, for example, the sensor 4 is arranged outside said volume 20.
More in detail, an indirect measurement of the temperature in the volume 20 may be obtained, for example, in the case where the sensor 4 is arranged in contact with an outer surface delimiting said volume 20 (as shown in Figure 2), whereby the temperature inside the volume 20 may be derived or calculated, for example by means of the electronic control unit 5.
It is preferable that the sensor 4 is a Negative Temperature Coefficient (NTC) sensor.
One or more sensors 4 may be used.
The invention also relates to a household appliance 100, 100', in particular a dishwasher or a washing machine, in particular configured to carry out the method according to the invention, comprising
- heating means 3 adapted to heat the liquid in said volume 20;
- at least one temperature sensor 4 adapted to measure, in particular directly or indirectly, the temperature in said volume 20;
- an electronic control unit 5 connected to said at least one sensor 4; wherein the electronic control unit 5 is configured to detect the presence of additive in the washing water contained in said volume 20 as a function of the trend over time of the temperature measured by means of said at least one sensor 4, while said heating means 3 generate heat for heating the liquid in said volume 20.
In particular, the electronic control unit 5 is configured so as to detect the presence of additive in the washing water if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time.
Said volume 20 may for example be defined by a pump of the household appliance, in particular provided with said heating means 3.
Alternatively, said volume 20 may for example be defined by a compartment of the household appliance.
The liquid may exit from the volume 20 for example by means of an opening or outlet section 70.

Claims

1. A method for detecting the presence of at least one washing additive in the washing water contained in a volume (20) of a household appliance (100, 100’), in particular a dishwasher or a washing machine, wherein said volume (20) is defined by a compartment of the household appliance (100, 100’) or by a pump of the household appliance (100, 100’); wherein there is provided a device (1 , 1 ') comprising
- at least one temperature sensor (4) adapted to measure, in particular directly or indirectly, the temperature in said volume (20);
- an electronic control unit (5) connected to said at least one sensor (4); wherein there are provided the steps of: a) heating the liquid in said volume (20) by means of heating means (3); b) measuring, in particular directly or indirectly, the temperature in said volume (20) by means of said at least one sensor (4); c) detecting, by means of the electronic control unit (5), the presence of washing additive in the washing water contained in said volume (20) as a function of the trend over time of the temperature measured by means of said at least one sensor (4), while the liquid in said volume (20) is heated by means of said heating means (3); wherein if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time, the presence of washing additive in the washing water is detected.
2. A method according to claim 1 , wherein said washing additive is a detergent and/or a fabric softener and/or a soap and/or a rinse aid.
3. A method according to claim 1 or 2, wherein there is provided the calculation, in particular by means of the electronic control unit (5), of the amount of water in said volume (20) as a function of the trend over time of the temperature measured by means of said at least one sensor (4), while heating means (3) generate heat for heating the liquid in said volume (20).
4. A household appliance (100, 100'), in particular a dishwasher or a washing machine, configured to carry out the method according to claim 1 or 2 or 3, comprising
- heating means (3) adapted to heat the liquid in said volume (20); - at least one temperature sensor (4) adapted to measure, in particular directly or indirectly, the temperature in said volume (20);
- an electronic control unit (5) connected to said at least one sensor (4); wherein the electronic control unit (5) is configured to detect the presence of additive in the washing water contained in said volume (20) as a function of the trend over time of the temperature measured by means of said at least one sensor (4), while said heating means (3) generate heat for heating the liquid in said volume (20); wherein the electronic control unit (5) is configured so as to detect the presence of additive in the washing water if the heating speed of the liquid is less than a predetermined heating speed or if the heating time to reach a predetermined temperature is greater than a predetermined time; wherein said volume (20) is defined by a pump of the household appliance, in particular provided with said heating means (3); or wherein said volume (20) is defined by a compartment of the household appliance.
PCT/IB2025/052580 2024-03-12 2025-03-11 Method for detecting the presence of a washing additive in the washing water contained in a volume of a household appliance and household appliance configured to carry out said method Pending WO2025191460A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102024000005524 2024-03-12
IT202400005524 2024-03-12

Publications (1)

Publication Number Publication Date
WO2025191460A1 true WO2025191460A1 (en) 2025-09-18

Family

ID=91184735

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2025/052580 Pending WO2025191460A1 (en) 2024-03-12 2025-03-11 Method for detecting the presence of a washing additive in the washing water contained in a volume of a household appliance and household appliance configured to carry out said method

Country Status (1)

Country Link
WO (1) WO2025191460A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005009196A1 (en) * 2003-06-24 2005-02-03 Ecolab Inc. Concentration monitor with resistivity probe and temperature compensation
EP3235939B1 (en) * 2016-04-21 2021-06-09 Electrolux Appliances Aktiebolag Method for the detection of foam in a laundry washing machine
US20230116564A1 (en) * 2021-10-07 2023-04-13 Michael Saier Dosing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005009196A1 (en) * 2003-06-24 2005-02-03 Ecolab Inc. Concentration monitor with resistivity probe and temperature compensation
EP3235939B1 (en) * 2016-04-21 2021-06-09 Electrolux Appliances Aktiebolag Method for the detection of foam in a laundry washing machine
US20230116564A1 (en) * 2021-10-07 2023-04-13 Michael Saier Dosing apparatus

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