WO2021101184A1 - Lave-vaisselle et procédé de commande de celui-ci - Google Patents

Lave-vaisselle et procédé de commande de celui-ci Download PDF

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Publication number
WO2021101184A1
WO2021101184A1 PCT/KR2020/016047 KR2020016047W WO2021101184A1 WO 2021101184 A1 WO2021101184 A1 WO 2021101184A1 KR 2020016047 W KR2020016047 W KR 2020016047W WO 2021101184 A1 WO2021101184 A1 WO 2021101184A1
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WO
WIPO (PCT)
Prior art keywords
wash water
dishwasher
water
rotation frequency
wash
Prior art date
Application number
PCT/KR2020/016047
Other languages
English (en)
Inventor
Honggyu Kim
Changwoo Son
Original Assignee
Lg Electronics Inc.
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 Lg Electronics Inc. filed Critical Lg Electronics Inc.
Publication of WO2021101184A1 publication Critical patent/WO2021101184A1/fr

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    • 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
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/421—Safety arrangements for preventing water damage
    • A47L15/4212—Detection of water leaks; Collection of leaked water, e.g. in the casing
    • 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
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0023—Water filling
    • 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
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention
    • 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
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
    • 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
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • 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
    • A47L2401/06—Water supply, circulation or discharge information
    • 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
    • A47L2401/09—Water level
    • 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
    • A47L2401/10—Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
    • 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
    • A47L2401/20—Time, e.g. elapsed operating time
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/26—Indication or alarm to the controlling device or to the user

Definitions

  • Disclosed herein are a dishwasher and a control method thereof, and, more particularly, a dishwasher and a control method thereof that may detect leakage of water from the dishwasher.
  • Dishwashers are devices that can wash contaminants such as residues left on cooking vessels or cooking tools (referred to as “cooking vessel”) using detergent and wash water.
  • a dishwasher of the related art includes a water supply vessel configured to store water to supply the water to a wash tub, a first water level sensor configured to sense that water is supplied to a predetermined height in the water supply vessel, a first water supply valve configured to open to supply the water from the water supply vessel to the wash tub when the first water level sensor senses that the water is supplied to the predetermined height in the water supply vessel, a second water level sensor configured to sense that the water is excessively supplied to the water supply vessel, and an abnormal state indication means connected to the second water level sensor and configured to indicate an abnormal state when the second water level sensor senses that the water is excessively supplied to the water supply vessel.
  • the dishwasher of the related art includes the two water level sensors. One water level sensor is used to sense a normal operation and the other is used to detect errors. Accordingly, the dishwasher of the related are can incur a large amount of manufacturing costs.
  • the dishwasher of the related art cannot detect deviation in water supply.
  • the present disclosure is directed to a dishwasher and a control method thereof that may adjust a level of wash water without an additional water level sensor.
  • the present disclosure is also directed to a dishwasher and a control method thereof that may reduce dispersion in water supply of wash water.
  • the present disclosure is also directed to a dishwasher and a control method thereof that may prevent leakage caused by an excessive water supply and prevent noise caused by a low water supply level.
  • the present disclosure is also directed to a dishwasher and a control method thereof that may detect leakage of water from an air guide.
  • a dishwasher may include a cabinet forming an exterior of the dishwasher, a wash tub forming a wash space in which an object to be washed is washed in the cabinet, an air guide including a water supply channel disposed on a side of the dishwasher and forming a path on which wash water is introduced, a drainage channel forming a path on which the wash water is discharged, and a first sensor attached to the water supply channel and configured to measure an amount of wash water introduced from the water supply channel, a sump disposed in a lower portion of the wash tub, configured to store the wash water introduced from the water supply channel and including a second sensor configured to sense the stored wash water and measure a turbidity of the stored wash water, and a controller configured to determine whether the wash water is introduced into the dishwasher based on a result of sensing of the second sensor, and, depending on a result of determination, determine whether the wash water leaks from the air guide based on a result of measurement of the first sensor or whether the wash water is supplied normally.
  • the second sensor may protrude into the sump, and, when a reference amount or greater of wash water is stored in the sump, sense the stored wash water, and measure a turbidity of the stored wash water.
  • the controller when the second sensor senses wash water, the controller may determine that the wash water is introduced into the dishwasher, and, when the second sensor does not sense wash water, the controller may determine that the wash water is not introduced into the dishwasher.
  • the controller may determine whether the wash water leaks from the air guide based on a result of measurement of the first sensor, and, when determining that the wash water is introduced into the dishwasher, the controller may determine whether the wash water is supplied normally based on a result of measurement of the first sensor.
  • the controller may compare first sensing time and predetermined first reference time to determine whether the wash water leaks from the air guide, the first sensing time may denote a period from a moment when the wash water starts to be introduced from the water supply channel to a moment when the first sensor measures an amount of the wash water, and the first reference time may denote a period from the moment when the wash water starts to be introduced from the water supply channel to a moment when a reference amount of wash water is introduced into the dishwasher, when the wash water does not leak from the air guide.
  • the controller may determine that the wash water leaks from the air guide when the first sensing time exceeds the first reference time.
  • the controller may determine whether the wash water is supplied normally based on a result of measurement of the first sensor, the second sensing time may denote a period from a moment when the wash water starts to be introduced from the water supply channel to a moment when the second sensor measures a turbidity of the wash water, and the second reference time may denote a period from the moment when the wash water starts to be introduced from the water supply channel to a moment when a required amount of wash water is introduced into the dishwasher, when the wash water does not leak from the air guide.
  • the first sensor may include an impeller configured to rotate based on an amount of the wash water introduced from the water supply channel, a magnet attached to one end of the impeller and configured to generate a magnetic field, and a Hall sensor configured to measure rotation frequency of the impeller using a change in values of magnetic fields generated by the magnet.
  • the controller may compare the rotation frequency of the impeller with first reference rotation frequency to determine whether the wash water is supplied normally, and, when the wash water does not leak from the air guide, the first reference rotation frequency may denote rotation frequency of the impeller during a period from a moment when the wash water starts to be introduced from the water supply channel to a moment when a reference amount of the wash water is introduced into the dishwasher.
  • the controller may determine that the wash water is supplied normally, and, when the rotation frequency of the impeller is different from the first reference rotation frequency, the controller may determine that the wash water is not supplied normally and adjust an amount of the wash water introduced from the water supply channel.
  • the controller when the controller determines that the wash water is not supplied normally and the rotation frequency of the impeller is more than the first reference rotation frequency, the controller may reduce an amount of the wash water introduced from the water supply channel, and, when the rotation frequency of the impeller is less than the first reference rotation frequency, the controller may increase an amount of the wash water introduced from the water supply channel.
  • the controller may compare the rotation frequency of the impeller with second reference rotation frequency to determine whether the wash water is supplied normally, and, when the wash water does not leak from the air guide, the second reference rotation frequency may denote rotation frequency of the impeller after the amount of the wash water introduced into the water supply channel is adjusted.
  • the controller may determine that the wash water is supplied normally, and, when the rotation frequency of the impeller is different from the second reference rotation frequency, the controller may determine that the wash water is not supplied normally and adjust an amount of the wash water introduced from the water supply channel.
  • the dishwasher and control method thereof may adjust a level of wash water without an additional water level sensor.
  • the dishwasher and control method thereof may reduce dispersion in water supply of wash water.
  • the dishwasher and control method thereof may prevent leakage caused by an excessive water supply and prevent noise caused by a low water supply level.
  • the dishwasher and control method thereof may detect leakage of water from an air guide.
  • FIG. 1A is a view showing an example dishwasher.
  • FIG. 1B is a cross-sectional view showing an example dishwasher.
  • FIG. 2 is a view showing an air guide of an example dishwasher.
  • FIG. 3 is a view showing a first sensor of an example dishwasher.
  • FIG. 4A is a view showing an example sump.
  • FIG. 4B is a cross-sectional view showing an example sump.
  • FIG. 5A is a front view showing an example second sensor.
  • FIG. 5B is a plan view showing an example second sensor.
  • FIG. 6 is a block diagram showing main components of an example dishwasher.
  • FIG. 7 is a flow chart showing a control method of an example dishwasher.
  • one component When one component is described as being “connected”, or “coupled” to another component, one component may be directly connected or directly coupled to another component; however, it is also to be understood that an additional component may be “interposed” between the two components, or the two components may be “connected”, or “coupled” through an additional component. On the contrary, when one component is “directly connected”, or “directly coupled” to another component, one component may be “connected”, or “coupled” to another component without an additional component.
  • FIGS. 1A and B An example dishwasher is described with reference to FIGS. 1A and B, hereunder.
  • FIG. 1A is a view showing an example dishwasher.
  • FIG. 1B is a cross-sectional view showing an example dishwasher.
  • an example dishwasher 1 may include a cabinet 11, an air guide 12, a wash tub 13, a plurality of racks 141, 142, a plurality of spray arms 151, 152, a sump 16, a pump 17, a water supply device 40, a drainage device 50.
  • An inside of the dishwasher 1 may denote an entire space in which wash water circulates from a moment when the wash water flows from the water supply device 40 into the dishwasher 1 to a moment when the wash water is drained by the drainage device 50.
  • the dishwasher 1 may be provided therein with the wash tub 13, the water supply device 40, the sump 16, the pump 17, the plurality of spray arms 151, 152, a water supply channel 121, and a drainage channel 122.
  • An outside of the dishwasher 1 may denote a space except for the inside of the dishwasher 1.
  • the cabinet 11 may form an exterior of the dishwasher 1.
  • the air guide 12 may be disposed on a side of the dishwasher 1.
  • the air guide 12 may include the water supply channel 121, the drainage channel 122 and a first sensor 123.
  • the water supply channel 121 may include a connection channel 1211, an upper channel 1212, and a lower channel 1213.
  • the connection channel 1211 may connect to the pump 17.
  • the upper channel 1212 may connect the connection channel 1211 and an upper arm 151.
  • the lower channel 1213 may connect the connection channel 1211 and a lower arm 152.
  • the upper channel 1212 and the lower channel 1213 may be branched from the connection channel 1211.
  • a diverter valve 1214 configured to control opening and closing of the upper channel 1212 and the lower channel 1213, may be included at a point at which the upper channel 1212 and the lower channel 1213 are branched from the connection channel 1211.
  • the wash tub 13 may form a wash space, in which an object to be washed is washed, in the cabinet 11.
  • the wash tub 13 may include an opening (not illustrated) a front of which is open, and may communicate with an outside of the cabinet 11 through the opening.
  • the opening may be opened and closed by a door 18 pivotally coupled to the cabinet 11. A user may allow the door 18 to pivot to open the opening, and then draw an upper rack 141 or a lower rack 142 from the wash tub 13.
  • the wash tub 13 may be provided therein with the upper rack 141 and/or the lower rack 142 on which objects to be washed are placed.
  • the objects to be washed may be stacked on the upper rack 141 and the lower rack 142 and attached to and detached from the wash tub 13.
  • the upper rack 141 may be disposed in an upper area of the wash tub 13, and the lower rack 142 may be disposed in an upper portion of the upper rack 141.
  • the upper arm 151 may be rotatably coupled to the upper channel 1212, and the lower arm 152 may be rotatably coupled to the lower channel 176.
  • the upper arm 161 and the lower arm 152 may spray water to the objects to be washed stacked on the upper rack 141 and/or the lower rack 142.
  • the upper arm 151 may spray water to the upper rack 141, and the lower arm 152 may spray water to the lower rack 142.
  • the wash water (wash water left in the wash tub 13) sprayed to the objects to be washed from the upper arm 151 and the lower arm 152 may be collected in the sump 16.
  • the sump 16 may include a second sensor 131, a sump cover 161 and a discharge opening 164.
  • the sump 16 may be disposed in a lower portion of the wash tub 13 and configured to store water (e.g., wash water and the like) introduced from the water supply channel 121.
  • the sump 16 may supply the wash water to the upper arm 151 and the lower arm 152, and may take back and collect the wash water in the wash tub13.
  • the sump 16 may distinguished from the wash tub 13 through the sump cover 161.
  • the second sensor 131 may include a light emitter 1311, a light receiver 1312, and a cover 1313. A configuration of the second sensor 131 is specifically described hereunder.
  • the sump cover 161 may include a collection hole 162.
  • the water in the wash tub 13 may flow into the sump 16 through the collection hole 162.
  • the discharge opening 164 may be disposed on one side of a lower portion of the sump 16, and may discharge the wash water and food residues through the discharge opening 164.
  • the water supply device 40 may be connected to the sump 16, and opened and closed by a water valve 41.
  • the water supply device 40 may supply wash water from a water supply source (not illustrated) to the sump 16.
  • the drainage device 50 may be attached to the lower portion of the sump 16 and discharge food residues.
  • the drainage device 50 may include a drainage space (not illustrated) in which a drainage pump (not illustrated) is installed, and a drainage pipe 51 configured to discharge the wash water and food residues discharged from the drainage space.
  • An example air guide 12 is described with reference to FIG. 2, hereunder.
  • FIG. 2 is a view showing an example air guide.
  • an example air guide 12 may include a water supply channel 121, a drainage channel 122, and a first sensor 123.
  • the water supply channel 121 may form a path on which wash water flows into the sump 16.
  • the drainage channel 122 may form a path on which the washer water in the sump 16 is discharged out of the dishwasher 1.
  • the first sensor 123 may be attached to the water supply channel 121.
  • the first sensor 123 may measure an amount of wash water introduced from the water supply channel 121 into the wash tub 13.
  • FIG. 3 is a view showing an example first sensor 123.
  • the first sensor 123 may denote a flow meter including an impeller 1231, a magnet 1232 and a Hall sensor 1233.
  • the impeller 1231 may rotate based on an amount of wash water introduced from the water supply channel 121. Accordingly, the first sensor 123 may count frequency (rpm) of rotation of the impeller 1231 and measure an amount of wash water introduced through the water supply channel 121.
  • the first sensor 123 may denote a flow meter but not be limited.
  • the magnet 1232 may be attached to one end of the impeller 1231 and may generate a magnetic field.
  • the magnetic field of the magnet 1232 may relate to a temperature around the wash tub 13 and a distance from the magnet 1232.
  • the Hall sensor 1233 may measure frequency (rpm) of rotation of the impeller 1231using a change in values of magnetic fields generated by the magnet 1232.
  • An example sump 16 is described with reference to FIGS. 4A, 4B, 5A, and 5B, hereunder.
  • FIG. 4A is a view showing an example sump.
  • FIG. 4B is a cross-sectional view showing an example sump.
  • FIG. 5A is a front view showing an example second sensor.
  • FIG. 5B is a plan view showing an example second sensor.
  • the sump 16 may store wash water (W) therein.
  • the sump 16 may include a second sensor 131 on one side thereof.
  • the sump 16 may connect to the water supply channel 121 and the drainage channel 122.
  • the sump 16 may include a wash pump (not illustrated) formed in the sump 16 and configured to pump wash water at high pressure, and a wash motor (not illustrated) attached to a lower side of the wash pump and configured to drive the wash pump.
  • a wash pump (not illustrated) formed in the sump 16 and configured to pump wash water at high pressure
  • a wash motor (not illustrated) attached to a lower side of the wash pump and configured to drive the wash pump.
  • Wash water (W) may flow into the sump 16 from the water supply device 40.
  • the sump 16 may store the wash water (W) and discharge the wash water (W) through a drainage pipe 15.
  • the sump 16 may supply wash water (W) to the upper arm 151 and/or the lower arm 152 through the water supply channel 121.
  • the sump 16 may discharge wash water (W) out of the dishwasher 1 through the drainage channel 122.
  • the sump 16 may include a mesh filter 163.
  • the mesh filter 163 may filter washer water (W) circulating in the dishwasher 1.
  • Washer water (W) may fill the sump 16 from a bottom (B) (referred to as "bottom") thereof.
  • the second sensor 131 may include a light emitter 1311, a light receiver 1312 and a cover 1313.
  • the second sensor 131 may sense the wash water (W) stored in the sump16 and measure a turbidity of the wash water (W).
  • the second sensor 131 may measure a result of sensing of wash water, a turbidity of wash water, a first time point and inflow time.
  • the first time point denotes a time point at which wash water (W) starts to be introduce from the bottom (B).
  • the inflow time denotes a period from the first time point to a moment when an amount of the wash water (W) reaches a reference amount.
  • the reference amount denotes a minimum amount by which the second sensor 131 may measure a turbidity of the wash water (W). That is, the inflow time denotes a period during which the wash water (W) fills the sump 16 to a first height (H) from the bottom (B) such that the second sensor 131 is submerged.
  • the second sensor 131 may sense the store wash water and measure a turbidity of the stored wash water.
  • the second sensor 131 may be disposed on one side of the sump 16 such that the second sensor 131 protrudes towards an inside of the sump 16 and the cover 1313 is disposed outside the sump 16.
  • the cover 1313 may be formed in a space (S) between the light emitter 1311 and the light receiver 1312. Additionally, the cover 1313 may be formed at an end of the light emitter 1311 and the light receiver 1312 such that the light emitter 1311 and the light receiver 1312 are disposed in the sump 16.
  • the second sensor 131 may sense wash water using intensity of light of the light receiver 1312, and measure the first time point at which the wash water is sensed and the inflow time.
  • the light emitter 1311 may emit predetermined light rays (L) to the light receiver 1312.
  • the light receiver 1312 may sense wash water (W) and measure a turbidity of the wash water (W) based on an amount of sensed light rays (L).
  • the second sensor 131 may measure a turbidity of wash water (W), based on intensity of the light rays (L) arriving at the light receiver 1312.
  • the dishwasher 1 may include a first sensor 123, a second sensor 131, a controller 30 and a water supply device 40, a drainage device 50 and a display device 60.
  • the first sensor 123 may measure an amount of wash water introduced from a water supply channel 121 into a wash tub 13. For example, the first sensor 123 may calculate an amount of wash water flowing into the wash tub 13 based on rotation frequency of an impeller 1231.
  • the first sensor 123 may calculate an amount of wash water flowing into the water supply channel 121 using rotation frequency of the impeller 1231.
  • the first sensor 123 may generate a first output signal (S1) including rotation frequency of the impeller 1231, a calculated amount of wash water and the like.
  • the second sensor 131 may generate a second output signal (S2) including a result of sensing of wash water, a turbidity of wash water, a first time point, and inflow time.
  • S2 a second output signal
  • the controller 30 may generate a control signal (CS) using the first output signal (S1) such that the water supply device 40 controls an amount of wash water flowing into the wash tub 13.
  • the controller 30 may determine whether the wash water is supplied and a turbidity of the wash water using the second output signal (S2).
  • the controller 30 may determine the amount of the wash water flowing into the wash tub 13 using the first output signal (S1) and the second output signal (S2), and determine whether the wash water leaks from an air guide 12.
  • the controller 30 may generate a control signal (CS) such that the display device 60 displays error information.
  • the error information denotes information indicating leakage of water.
  • the controller 30 may generate a control signal (CS) such that the drainage device 50 discharges the wash water in the wash tub 13.
  • CS control signal
  • a method of the controller 30's determining whether water is supplied and whether water leaks from the air guide 12, and a method of the controller 30's controlling an amount of wash water flowing into the wash tub 13 are described hereunder.
  • the water supply device 40 may include the first sensor 123 to sense an amount of wash water supplied through a water supply valve 41.
  • the water supply device 40 may control the water supply valve included in the water supply channel 121 according to a control signal (CS). Accordingly, the water supply device 40 may control an amount of wash water flowing into the wash water 13 according to the control signal (CS).
  • CS control signal
  • the drainage device 50 may control a drainage pump (not illustrated) included in a drainage channel 122 according to a control signal (CS). Accordingly, the drainage device 50 may control drainage of wash water in a sump 16 according to the control signal (CS).
  • a drainage pump not illustrated
  • CS control signal
  • the display device 60 may display error information including information as to whether water leaks from the air guide 12, according to a control signal (CS).
  • CS control signal
  • a control method of an example dishwasher is described with reference to FIG. 7, hereunder.
  • the controller 30 may determine whether wash water is introduced based on a result of sensing of the second sensor 131. That is, the controller 30 may determine whether wash water is introduced into the wash tub 13 based on the second output signal (S2).
  • the controller 30 may determine that the wash water is introduced into the dishwasher 1. On the contrary, when the second sensor 131 does not sense the wash water, the controller 30 may determine that the wash water is not introduced into the dishwasher 1.
  • step 12 when determining that the wash water is not introduced into the wash tub 13, the controller 30 may determine whether the wash water leaks from the air guide 12, based on a result of measurement of the first sensor 123.
  • the controller 30 may compare first sensing time and predetermined first reference time based on the first output signal (S1).
  • the first sensing time denotes a period from a moment when wash water starts to be introduced from the water supply channel 121 to a moment when the first sensor 123 measures an amount of the wash water.
  • the first reference time may denote a period from the moment when wash water starts to be introduced from the water supply channel 121 to a moment when a reference amount of the wash water is introduced into the dishwasher 1, when the wash water does not leak from the water supply channel 121, but not be limited.
  • the controller 30 may determine that the wash water leaks from the air guide 12.
  • the controller 30 may determine whether the wash water is normally supplied, based on results of measurement of the first sensor 123.
  • the controller 30 may determine whether second sensing time is the same as predetermined second reference time, based on the second output signal (S2).
  • the second sensing time denotes a period from the moment when wash water starts to be introduced from the water supply channel 121 to a moment when the second sensor 131 measures a turbidity of the wash water.
  • the second reference time denotes a period from the moment when wash water starts to be introduced from the water supply channel 121 to a moment when a required amount of the wash water is introduced into the dishwasher 1 when the wash water does not leak from the air guide 12.
  • the required amount may be an amount required for the second sensor 131 to measure a turbidity of the wash water, and may be the reference amount or greater.
  • the controller 30 may determine whether rotation frequency of the impeller 1231 is the same as predetermined first reference rotation frequency using the first output signal (S1). That is, the controller 30 may compare the rotation frequency of the impeller 1231 and the first reference rotation frequency and determine whether the wash water is normally supplied.
  • the first reference rotation frequency may be rotation frequency of the impeller 1231 from the moment when the wash water starts to be introduced from the water supply channel 121 to the moment when the reference amount of the wash water is introduced, when the wash water does not leak from the air guide 12.
  • the first reference rotation frequency may be pre-determined and stored in the controller 30 but not limited.
  • the controller 30 may determine that the wash water is not supplied normally, and control the amount of the wash water introduced from the water supply channel 121. Accordingly, in step 32, the controller 30 may generate a control signal (CS) to control the amount of the wash water when the rotation frequency of the impeller 1231 is different from the first reference rotation frequency.
  • CS control signal
  • the controller 30 may generate a control signal (CS) to increase or decrease an amount of wash water flowing into the wash tub 13 at a second time point.
  • the second time point may denote a time point, which is following the first time point, after the comparison between the rotation frequency of the impeller 1231 and the first reference rotation frequency.
  • the controller 30 may generate a control signal (CS) to increase the rotation frequency of the impeller 1231 at the second time point. That, when the rotation frequency of the impeller 1231 is less than the first reference rotation frequency, the controller 30 may increase the amount of the wash water introduced from the water supply channel 121.
  • CS control signal
  • the controller 30 may generate a control signal (CS) to decrease the rotation frequency of the impeller 1231 at the second time point.
  • CS control signal
  • the amount of the wash water flowing into the wash tub 13 may decrease. That is, when the rotation frequency of the impeller 1231 is more than the first reference rotation frequency, the controller 30 may decrease the amount of the wash water introduced from the water supply channel 121.
  • step 41 when determining the rotation frequency of the impeller 1231 is the same as the first reference rotation frequency, the controller 30 may determine that the wash water flowing into the wash tub 13 is normally supplied, and may perform a following wash process.
  • the controller 30 may determine whether the rotation frequency of the impeller 1231, corresponding to the controlled amount of the wash water, is the same as predetermined second reference rotation frequency, in step 42.
  • the second reference rotation frequency may denote rotation frequency of the impeller 131 after the control over the amount of the wash water introduced from the water supply channel 121, when the wash water does not leak from the air guide 12.
  • the second reference rotation frequency may be pre-determined and stored in the controller 30 but not limited.
  • step 43 when determining the rotation frequency of the impeller 1231, corresponding to the controlled amount of the wash water, is the same as the second reference rotation frequency, the controller 30 may determine that the wash water flowing into the wash tub 13 is normally supplied, and may perform a following wash process.
  • the controller 30 may go back to step 32 and adjust the amount of the wash water introduced from the water supply channel 121.
  • leakage of water from the air guide 12 may be sensed using the first sensing time.
  • a normal water supply may be determined using the rotation frequency of the impeller 1231.
  • an amount of wash water may be controlled using the rotation frequency of the impeller 1231 in the case of an abnormal water supply.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

La présente invention concerne un lave-vaisselle, comprenant une enceinte, une cuve de lavage, un guide d'air comprenant un canal d'alimentation en eau, un canal de vidange, et un premier capteur attaché au canal d'alimentation en eau et configuré pour mesurer une quantité d'eau de lavage introduite à partir du canal d'alimentation en eau, un puisard comprenant un deuxième capteur configuré pour détecter l'eau de lavage stockée et mesurer la turbidité de l'eau de lavage stockée, et un dispositif de commande configuré pour déterminer si l'eau de lavage est introduite dans le lave-vaisselle en fonction d'un résultat de détection du deuxième capteur et, selon un résultat de détermination, déterminer si l'eau de lavage fuit du guide d'air en fonction d'un résultat de mesure du premier capteur ou si l'eau de lavage est fournie normalement.
PCT/KR2020/016047 2019-11-19 2020-11-16 Lave-vaisselle et procédé de commande de celui-ci WO2021101184A1 (fr)

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KR1020190148987A KR20210061143A (ko) 2019-11-19 2019-11-19 식기 세척기 및 식기 세척기의 제어 방법
KR10-2019-0148987 2019-11-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4388969A1 (fr) * 2022-12-20 2024-06-26 LG Electronics Inc. Lave-vaisselle

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JP2006204565A (ja) * 2005-01-28 2006-08-10 Matsushita Electric Ind Co Ltd 食器洗い機
KR100988619B1 (ko) * 2008-04-11 2010-10-18 엘지전자 주식회사 식기세척기
US20150020887A1 (en) * 2010-06-30 2015-01-22 Electrolux Home Products, Inc. System and associated method for preventing overfilling in a dishwasher
KR101580123B1 (ko) * 2009-01-09 2015-12-28 엘지전자 주식회사 식기 세척기 및 식기 세척기의 급수 방법
KR101938705B1 (ko) * 2011-12-20 2019-01-16 삼성전자주식회사 식기 세척기 및 그 제어 방법

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KR0184390B1 (ko) 1996-12-17 1999-05-01 구자홍 식기세척기의 급수 제어장치 및 급수 제어방법

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Publication number Priority date Publication date Assignee Title
JP2006204565A (ja) * 2005-01-28 2006-08-10 Matsushita Electric Ind Co Ltd 食器洗い機
KR100988619B1 (ko) * 2008-04-11 2010-10-18 엘지전자 주식회사 식기세척기
KR101580123B1 (ko) * 2009-01-09 2015-12-28 엘지전자 주식회사 식기 세척기 및 식기 세척기의 급수 방법
US20150020887A1 (en) * 2010-06-30 2015-01-22 Electrolux Home Products, Inc. System and associated method for preventing overfilling in a dishwasher
KR101938705B1 (ko) * 2011-12-20 2019-01-16 삼성전자주식회사 식기 세척기 및 그 제어 방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4388969A1 (fr) * 2022-12-20 2024-06-26 LG Electronics Inc. Lave-vaisselle

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