WO2024039084A1 - 식기세척기 - Google Patents
식기세척기 Download PDFInfo
- Publication number
- WO2024039084A1 WO2024039084A1 PCT/KR2023/010330 KR2023010330W WO2024039084A1 WO 2024039084 A1 WO2024039084 A1 WO 2024039084A1 KR 2023010330 W KR2023010330 W KR 2023010330W WO 2024039084 A1 WO2024039084 A1 WO 2024039084A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- turbidity
- cycle
- washing
- dishwasher
- washing water
- 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.)
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Classifications
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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
- A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
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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
- A47L15/0018—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
-
- 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
- A47L15/0026—Rinsing phases
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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
- A47L15/0018—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
- A47L15/0028—Washing phases
-
- 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
- A47L15/0047—Energy or water consumption, e.g. by saving energy or water
-
- 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
- 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
- A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction
-
- 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
- A47L2501/30—Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions
Definitions
- the present invention relates to a dishwasher, and more specifically, to a dishwasher that can detect the turbidity of washing water in real time regardless of specific measurement conditions, thereby effectively identifying the progress of the administration, and to detect the progress of the administration in real time through a turbidity sensor. It's about the dishwasher.
- a dishwasher is a device that sprays washing water such as water to wash dishes and cooking utensils stored inside. At this time, the washing water used for washing may contain detergent.
- a dishwasher includes a washing tank that forms a washing space, a storage unit that accommodates the washing object inside the washing tank, a spray arm that sprays washing water into the storage unit, and a sump that stores water and supplies wash water to the spray arm. It is common to be
- European Patent Publication No. 2175766 (prior document 001) describes a configuration for measuring turbidity through a turbidity sensor during the operation of a dishwasher.
- Prior document 001 is a configuration that measures turbidity at a specific washing water motor speed during the stroke in order to reduce the noise included in the turbidity value detected through the turbidity sensor and minimize the deviation of the detected turbidity value, either the upper spray arm or the lower spray arm.
- a configuration for measuring turbidity when a specific spray arm rotates and a configuration for measuring turbidity when all spray arms rotate are described.
- prior art document 001 can be configured to detect turbidity only under certain conditions during the process and control the dishwasher through the detected turbidity.
- the present invention was conceived to solve the problems of the prior art described above, and its first purpose is to provide a dishwasher that can detect wash water turbidity in real time regardless of specific measurement conditions and thus effectively determine the progress of the cycle. do.
- the second purpose of the present invention is to provide a dishwasher that can determine the progress of the stroke in real time through a turbidity sensor and can effectively automatically increase or decrease the stroke time accordingly.
- the present invention provides a dishwasher that can minimize power loss and effectively prevent time delays by completing the cycle before the scheduled cycle time elapses when it is determined that washing or rinsing has progressed to a satisfactory level through the detected turbidity.
- the third purpose is to do so.
- a dishwasher includes a tub forming a washing space; a sump disposed below the tub and storing washing water to be supplied to the tub; a wash water pump that pressurizes the wash water and supplies it to the wash space; A turbidity sensor that detects the turbidity value of the washing water; and a control unit electrically connected to the turbidity sensor and the washing water pump, wherein the control unit detects the turbidity value of the washing water through the turbidity sensor during the stroke, and controls the stroke based on the detected turbidity value. It is characterized by performing a step to determine whether to proceed.
- the step of determining whether to proceed with the washing cycle may include calculating a change rate of the turbidity value while the washing cycle is in progress, and determining whether to proceed with the cleaning cycle based on the calculated rate of change.
- the step of determining whether to proceed with the washing process may include detecting a turbidity value of the washing water by receiving an output signal from the turbidity sensor after the washing water pump starts operating; Sampling the detected turbidity values of the washing water in a first cycle and storing the sampled turbidity values; calculating a first turbidity average value by calculating an average value of turbidity values sampled and stored for a first time; sampling the turbidity value of the washing water detected after calculating the first turbidity average value in a second cycle and storing the sampled turbidity values; calculating a second turbidity average value by calculating the average value of turbidity values sampled during a second time period after calculating the first turbidity average value; and calculating a rate of change of the second turbidity average value relative to the first turbidity average value, and determining whether the calculated change rate exceeds a reference rate of change.
- control unit may further perform a step of determining to stop the washing cycle.
- control unit may further perform a step of stopping the operation of the washing water pump when it is determined to stop the washing cycle.
- first cycle and the second cycle may be equal to each other.
- first period and the second period may be 1 second.
- the first time and the second time may be equal to each other.
- the standard change rate may be 10%.
- the step of determining whether to proceed with the rinse cycle may include determining whether to proceed with the rinse cycle based on the turbidity value measured during the rinse cycle.
- the step of determining whether to proceed with the rinsing cycle includes: receiving an output signal from the turbidity sensor and detecting a turbidity value of the washing water; Sampling the detected turbidity values of the washing water in a third cycle and storing the sampled turbidity values; and determining whether the sampled turbidity value exceeds a reference turbidity value.
- control unit may determine to stop the rinsing cycle.
- control unit may further perform a step of stopping the operation of the washing water pump when it is determined to stop the rinsing cycle.
- the third period may be 1 second.
- the reference turbidity value may be 100 NTU.
- the dishwasher according to the present invention is capable of detecting wash water turbidity in real time regardless of specific measurement conditions, which has the effect of effectively determining the progress of the washing machine.
- the dishwasher according to the present invention has the effect of being able to determine the progress of the stroke in real time through a turbidity sensor and effectively automatically increase or decrease the stroke time accordingly.
- the dishwasher according to the present invention can complete the cycle before the scheduled cycle time elapses when it is determined that washing or rinsing has progressed to a satisfactory level through the detected turbidity, thereby minimizing power loss and effectively preventing time delays. It has an effect.
- FIG. 1 is a front perspective view of a dishwasher according to an embodiment of the present invention.
- Figure 2 is a schematic cross-sectional view of the dishwasher shown in Figure 1.
- Figure 3 is a schematic diagram explaining the state in which the turbidity sensor is installed in the sump and the function of the turbidity sensor.
- Figure 4 is a perspective view of the turbidity sensor shown in Figure 3.
- Figure 5 is a functional block diagram showing the configuration of a control unit according to an embodiment of the present invention.
- Figures 6 and 7 are graphs showing turbidity values detected during the washing process.
- Figure 8 is a graph showing turbidity values detected during the rinsing process.
- 9 to 11 are flow charts for explaining a method of controlling a dishwasher according to an embodiment of the present invention.
- first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another component, and unless specifically stated to the contrary, the first component may also be a second component.
- top (or bottom) of a component or the arrangement of any component on the “top (or bottom)” of a component means that any component is placed in contact with the top (or bottom) of the component. Additionally, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.
- each component when a component is described as being “connected,” “coupled,” or “connected” to another component, the components may be directly connected or connected to each other, but other components may be “interposed” between each component. It should be understood that “or, each component may be “connected,” “combined,” or “connected” through other components.
- Figure 1 is a front perspective view showing a dishwasher according to the present invention
- Figure 2 is a simplified cross-sectional view briefly showing the internal structure of the dishwasher according to the present invention.
- the dishwasher 1 includes a case 10 forming the outer shape, and a washing machine installed inside the case 10 and washing objects.
- a tub 20 that forms a space 21 and has an open front, a door 30 that opens and closes the open front of the tub 20, and washing water for washing objects located in the lower part of the tub 20.
- a driving unit 40 that supplies, collects, circulates, and drains water, a storage unit 50 that is detachably provided in the internal washing space 21 of the tub 20 and where a cleaning object is placed, and a storage unit 50. It is installed adjacent to and is provided with a spray unit 60 that sprays washing water for washing the cleaning object.
- the object to be washed seated in the storage unit 50 may be, for example, dishes such as bowls, plates, spoons, and chopsticks, and other cooking utensils.
- dishes such as bowls, plates, spoons, and chopsticks, and other cooking utensils.
- objects to be washed will be referred to as dishes.
- the tub 20 may be formed in a box shape with an entirely open front, and corresponds to a configuration known as a so-called washing tank disposed on the upper side of the base 90.
- a washing space 21 is formed inside the tub 20, and the open front can be opened and closed by the door 30.
- the tub 20 may be formed through press processing of a metal plate resistant to high temperature and moisture, for example, a stainless steel plate.
- a plurality of brackets are disposed for the purpose of supporting and installing functional components such as the storage portion 50 and the spray portion 60, which will be described later, within the tub 20. It can be.
- the driving unit 40 includes a sump 41 that stores washing water, a sump cover 42 that separates the sump 41 from the tub 20, and a water supply unit that supplies washing water to the sump 41 from the outside. (43), a drain unit 44 for discharging the wash water of the sump 41 to the outside, a wash water pump 45 and a supply passage 46 for supplying the wash water of the sump 41 to the spray unit 60. It may be configured to include a filter unit 47 that is disposed inside the sump 41 and filters the washing water.
- the water supply unit 43 may include a water supply pipe 431 that receives washing water from an external water supply source, and a water supply valve 432 that opens and closes the water supply pipe 431.
- the drain unit 44 may include a drain pipe 441, one end of which is fluidly connected to the sump and the other end of which extends outside the dishwasher 1, and a drain valve 442 that opens and closes the drain pipe. At this time, the drain unit 44 may further include a drain pump (not shown) for forcibly draining the wash water to the outside during the wash or rinse cycle.
- the sump cover 42 is disposed on the upper side of the sump 41 and may serve to distinguish the tub 20 and the sump 41. Additionally, the sump cover 42 may be provided with a plurality of recovery holes for recovering the washing water sprayed into the washing space 21 through the spray unit 60 to the sump 41.
- the washing water sprayed from the spray unit 60 towards the dishes falls to the bottom of the washing space 21 and can be recovered back to the sump 41 through the sump cover 42.
- the wash water pump 45 is provided on the side or bottom of the sump 41 and serves to pressurize the recovered wash water and re-supply it to the spray unit 60.
- the washing water pump 45 may be connected to the sump 41 and the other end may be connected to the supply passage 46.
- the washing water pump 45 may be equipped with an impeller 451 and a motor 453. When power is supplied to the motor 453, the impeller 451 rotates, and the washing water in the sump 41 is pressurized and can be supplied to the spray unit 60 through the supply passage 46.
- the supply passage 46 may serve to selectively supply the washing water supplied from the washing water pump 45 to the spray unit 60.
- the supply passage 46 includes a first supply passage 461 connected to the lower injection arm 61, a second supply passage 463 connected to the upper injection arm 62, and the top nozzle 63. This can be done, and the supply passage 46 may be provided with a supply passage switching valve 465 that selectively opens and closes the supply passages 461 and 463.
- the supply passage switching valve 465 may be controlled to open each of the supply passages 461 and 463 sequentially or simultaneously.
- the sump 41 may be equipped with a turbidity sensor 48 as a means for detecting the turbidity of the washing water stored inside the sump, as will be described later.
- the spray unit 60 is provided to spray washing water on dishes stored in the storage unit 50, etc.
- the spray unit 60 is located at the bottom of the tub 20 and is located between the lower spray arm 61 that sprays washing water to the lower rack 51, and the lower rack 51 and the upper rack 52.
- An upper spray arm (62) is located and sprays wash water to the lower rack (51) and upper rack (52), and is located at the top of the tub (20) and sprays wash water to the top rack (53) or upper rack (52). It may include a top nozzle 63.
- the lower spray arm 61 and the upper spray arm 62 are rotatably provided in the washing space 21 of the tub 20 and can spray washing water while rotating toward the dishes in the storage unit 50.
- the lower spray arm 61 may be rotatably supported on the upper side of the sump cover 42 so that it can spray washing water while rotating toward the lower rack 51 from the bottom of the lower rack 51.
- a hub 613 through which washing water is supplied from the first supply passage 461 may be provided at the lower part of the lower spray arm.
- the hub 613 may be rotatably supported by a lower spray arm holder 640 connected to the sump 41.
- the upper spray arm 62 may be rotatably supported by the upper spray arm holder so that it can spray washing water while rotating between the lower rack 51 and the upper rack 52.
- the lower surface 25 of the tub 20 may be further provided with means for diverting the washing water sprayed from the lower spray arm 61 to the upward direction (U-direction) in order to increase washing efficiency.
- the detailed configuration of the lower injection arm 61 will be described later with reference to FIG. 3 and below.
- the washing space 21 may be provided with a storage unit 50 for storing dishes.
- the storage unit 50 is provided to be withdrawn from the inside of the tub 20 through the open front of the tub 20 .
- a lower rack 51 is located at the lower part of the tub 20 and can accommodate relatively large dishes
- an upper rack 51 is located on the upper side of the lower rack 51 and can accommodate medium-sized dishes.
- An embodiment is shown in which a storage unit including a rack 52 and a top rack 53 located at the top of the tub 20 and capable of storing small dishes, etc. is shown.
- the present invention is not limited to this, but will be described based on an embodiment of a dishwasher provided with three storage units 50 as shown.
- These lower racks 51, upper racks 53, and top racks 53 may each be configured to pass through the open front of the tub 20 and be drawn out.
- guide rails may be provided on both walls forming the inner peripheral surface of the tub 20.
- the guide rails may include an upper rail, a lower rail, and a top rail.
- Wheels may be provided below the lower rack 51, upper rack 53, and top rack 53, respectively.
- the user can store dishes in the lower rack 51, upper rack 53, and top rack 53 by pulling them out through the front of the tub 20, or easily remove washed dishes from them. You can take it out.
- the guide rail 54 is a fixed guide rail in the form of a simple rail for guiding the withdrawal and insertion of the injection unit 60, or guides the withdrawal and storage of the injection unit 60, and the withdrawal distance according to the withdrawal of the injection unit 60. It can be provided as a telescopic guide rail that increases.
- the door 30 has the purpose of opening and closing the open front of the tub 20 described above.
- a hinge part (not shown) for opening and closing the door 30 is provided at the lower part of the normally open front, and the door 30 is opened by rotating around the hinge part as a rotation axis.
- a handle 31 for opening the door 30 and a control panel 32 for controlling the dishwasher 1 may be provided on the outer surface of the door 30.
- control panel 32 includes a display 33 that visually displays information about the current operating status of the dishwasher, a selection button for inputting the user's selection operation, and a button for turning the power of the dishwasher on and off.
- a button unit 34 including a power button through which a user's operation is input may be provided.
- the inner surface of the door 30 forms one side of the tub 20 when the door 30 is closed, and is supported by the lower rack 51 of the storage unit 50 when the door 30 is fully opened.
- a possible seating surface can be formed.
- the inner surface of the door 30 forms a horizontal plane in the same direction as the direction in which the guide rail 54 along which the lower rack 51 is guided extends.
- the door may be further equipped with a detergent supply unit for storing detergent to be used in the washing process and rinse aid to be used in the rinsing process and automatically discharging them into the washing space 21.
- an automatic door opening module 352 may be provided on the outside of the upper surface of the tub 20 to automatically open the door.
- the automatic door opening module 352 moves the door 30 to a predetermined open position when the dry air supply unit 80, which will be described later, operates and supplies dry air to the inside of the tub 20, thereby opening the front of the tub 20. It plays a role in partially opening (22).
- the air that becomes humid while drying dishes can be discharged through the upper front side 22 of the open tub 20.
- the automatic door opening module 352 may be provided with a push rod 3524 that rotates the rear top of the door 30 to the open position.
- a dry wind supply unit 80 may be provided at the lower part of the tub 20 to generate and supply high-temperature or low-temperature dry wind to the washing space inside the tub 20.
- the dry air supply unit 80 includes a filter member 883 that filters external air, a blower fan 825 that generates a dry wind airflow, a heater 84 that heats the dry wind airflow, and a tub. It is disposed inside and may be configured to include an airflow guide 83 that guides the drying wind airflow.
- a dry wind supply hole may be provided on the lower surface of the tub 20 to allow high-temperature dry wind generated in the dry wind supply unit to be introduced into the interior of the tub 20.
- Figure 3 is a schematic diagram showing the turbidity sensor 48 of the dishwasher 1 according to an embodiment of the present invention disposed in the sump 41
- Figure 4 is a schematic diagram showing the turbidity sensor 48 shown in Figure 3. This is a perspective view showing an example.
- the turbidity sensor 48 serves to detect the turbidity of the washing water stored in the sump 41.
- the turbidity sensor 48 can be installed penetrating the sump 41.
- the dishwasher 1 includes a washing cycle for spraying washing water onto the dishes to wash them, a rinsing cycle for rinsing the dishes by spraying newly supplied washing water onto the dishes, and a drying air supply unit 80. It may be configured to proceed with a drying process of drying dishes using the drying wind airflow generated from .
- control unit 100 which will be described later, may be configured to receive a command regarding whether to proceed with the drying cycle.
- the washing process may include a pre-washing process in which washing water containing no detergent is sprayed on the dishes, and a detergent washing process in which detergent is added to the washing water and the washing water is sprayed on the dishes.
- the rinsing process may include a pre-rinsing process in which wash water containing no rinse is sprayed on the dishes, and a rinse rinse process in which rinse is added to the wash water and the wash water is sprayed on the dishes.
- the rinsing process may further include a heating rinsing process.
- a heating rinsing process When the washing water is heated and rinsed, the dishes are heated, and the residual heat of the dishes during the subsequent drying process may promote evaporation of water remaining on the surface of the dishes.
- the turbidity sensor (48) In order to detect the turbidity of the wash water while a sufficient amount of wash water to carry out such a wash or rinse cycle is stored in the sump (41), the turbidity sensor (48) is located close to the top of the sump (41). can be placed. As shown in FIG. 4, the turbidity sensor 48 is arranged to face each other and a detection area 481 through which washing water flows, and emits light to pass through the detection area 481. It may be configured to include a unit 482 and a light receiving unit 483 that receives light passing through the sensing area 481.
- Washing water supplied into the sump 41 may flow along the sensing area 481 of the turbidity sensor 48.
- the light emitted from the light emitting unit 482 may pass through the washing water flowing through the sensing area 481 and be received by the light receiving unit 483.
- the control unit 100 can calculate the current turbidity value of the washing water by converting the voltage value included in the output signal to the corresponding turbidity value using a pre-stored conversion table.
- the conversion table may be stored in data form in advance in memory.
- the control unit 100 may separately convert the calculated turbidity value into data and store it in memory. At this time, as will be described later, the turbidity value can be sampled at a predetermined period, that is, at a 1-second period and stored in the memory.
- the turbidity sensor 48 may be configured to further detect the amount of foam present in the washing space 21 as well as the turbidity of the washing water.
- the generated foam may be located on the surface of the washing water stored in the sump 41. Therefore, the light output from the light emitting unit 482 is reflected from the surface of the foam, and only a portion of the light output from the light emitting unit 482 is transmitted to the light receiving unit 483. Therefore, when the voltage value is low, the amount of bubbles is judged to be large, and when the voltage value is high, the amount of bubbles is judged to be small. In other words, the turbidity value is proportional to the amount of foam.
- control unit 100 of the dishwasher 1 According to an embodiment of the present invention will be described with reference to FIG. 5.
- the dishwasher 1 may include a control unit 100 for controlling each functional configuration.
- the control unit 100 may be provided in various forms, such as a microcontroller, microcomputer, or microprocessor, as is known in the art.
- control unit 100 may be electrically connected to a power conversion unit (not shown). Power input from an external power source (not shown) is converted through the power conversion unit and used in the control unit 100, the motor 453 of the washing water pump 45, the water supply valve 432, the drain valve 442, the turbidity sensor 48, and It can be supplied through the supply flow switch valve 465, etc.
- control unit 100 operates a water supply valve 432 that opens and closes the water supply pipe 431 that receives washing water from an external water supply source, and pressurizes the washing water supplied through the water supply pipe 431 to clean the washing space of the tub 20 ( It can be electrically connected to the motor 453 of the washing water pump 45 supplied to 21).
- the control unit 100 opens the water supply valve 432 to supply the washing water to the sump 41 through the water supply pipe 431, and the washing water stored in the sump 41
- the washing water pump 45 can be operated by supplying power to the motor 453 of the washing water pump 45 in order to pressurize and supply it to the spray unit 60.
- control unit 100 distributes and supplies the wash water pressurized through the wash water pump 45 to the lower spray arm 61, upper spray arm 62, or top nozzle 63 that constitutes the spray unit 60. It can be electrically connected to the supply channel switching valve 465, which serves to switch the flow path.
- control unit 100 transmits a control signal to the supply passage switching valve 465 so that all or part of the pressurized washing water is supplied to the lower spray arm 61 through the first supply passage 461 or the second supply passage. It can be controlled to be supplied to the upper spray arm 62 and the top nozzle 63 through (463).
- control unit 100 may be electrically connected to a drain valve 442 that opens and closes the drain pipe 441 for discharging the wash water that has completed washing or rinsing the cleaning object to the outside.
- the control unit 100 may control the drain valve 442 to close the drain pipe 441 while the cleaning or rinsing cycle is in progress and to open the drain pipe 441 when the cleaning or rinsing cycle is completed.
- control unit 100 may be electrically connected to the turbidity sensor 48 for detecting the turbidity of the washing water in real time during the washing or rinsing cycle.
- the turbidity sensor 48 can generate a voltage value that varies depending on the turbidity or contamination level of the washing water as an output signal and transmit this to the control unit 100 in real time.
- the control unit 100 which is electrically connected to the turbidity sensor 48, can receive the output signal of the turbidity sensor 48 and convert the received output signal into a turbidity value to detect the current turbidity of the washing water.
- control unit 100 can indirectly estimate the current washing state or rinsing state of the washing object in real time based on the detected turbidity value of the washing water.
- control unit 100 may determine whether to continue the washing process or rinsing process, that is, whether to stop it, based on the washing state or rinsing state of the cleaning object estimated through the turbidity value.
- the basis for judging the cleaning state of the cleaning object during the washing cycle and the rinsing state of the cleaning object during the rinsing cycle may be different.
- the standards for judging the cleaning status of the cleaning object in the cleaning process are as follows.
- Figures 6 and 7 show graphs recording the turbidity value of the washing water detected during the washing process over time.
- the degree of contamination or degree of cleaning of the object to be washed can be estimated based on the rate of change (RM) of the turbidity value of the washing water.
- the rate of change (RM) of the turbidity value detected through the turbidity sensor 48 exceeds a predetermined level, it can be determined that the decontamination of the object to be cleaned is not completed, that is, the cleaning is not completed, and the turbidity value If the rate of change (RM) is below a predetermined level, it can be determined that decontamination of the object to be cleaned has been sufficiently completed, that is, the cleaning has been completed.
- the rate of change (RM) of such turbidity value can be exemplarily achieved through the following process.
- the first turbidity average value (M1) of the turbidity values sampled in the first cycle for a predetermined first time period after the washing cycle is initiated and the operation of the washing water pump 45 is started is calculated.
- the second turbidity average value (M1) of the turbidity values sampled in the second period for the second time after the first time has elapsed is calculated.
- the change rate (RM) of the second turbidity average value (M2) with respect to the first turbidity average value is calculated, and the calculated change rate (RM) Compare the predetermined reference rate of change (RMth).
- the rate of change (RM) can be calculated using the following formula.
- the first period and the second period may each be 1 second, and the first period and the second period may be 5 minutes.
- the rate of change (RM) of the turbidity value can be detected and the reference rate of change (RMth) determined in 5-minute increments, and whether or not to stop the washing process can be determined in 5-minute increments.
- the reference rate of change (RMth) may be 10%.
- the standards for judging the cleaning state of the cleaning object in the rinsing cycle are as follows.
- the rinsing cycle is a process to remove detergent remaining on the cleaning object after completion of the cleaning cycle.
- the rinsing state of the object to be washed can be determined by the amount of residual detergent or rinse added during the rinsing cycle, and this can be estimated through the turbidity value of the washing water detected through the turbidity sensor 48.
- Whether or not to stop the rinsing cycle can be determined by comparing and judging the turbidity value measured through the turbidity sensor 48 and sampled in the third cycle with the reference turbidity value.
- the standard turbidity value may be 100 NTU (Nephelometry Turbidity Unit).
- 100 NTU is the turbidity value measured when the draining and rinsing processes are repeated about 4 times, and is recognized by safety standards.
- control unit 100 is electrically connected to the memory and timer.
- the control unit 100 calls operation conditions and time conditions for each stroke pre-stored in memory and uses them to generate a control signal to control the progress and end of the stroke.
- a conversion table for converting the output signal received from the turbidity sensor 48 into a turbidity value may be stored in advance in the memory, and the converted turbidity value may be separately converted into data and stored in the memory.
- control unit 100 can use a timer to calculate the elapsed time for each stroke and determine whether each stroke is complete by comparing it with pre-stored time conditions for each stroke.
- timer can be used to measure the time of the first to third cycles for sampling the turbidity value, and the first and second times for calculating the turbidity average values (M1, M2). there is.
- control unit 100 is electrically connected to the display and the audio output unit.
- the control unit 100 can visually display information about the operating status, operating time, and whether rinsing is complete, etc. of the dishwasher 1 through a display, and can signal the dishwasher 1 through an audio output unit such as the above-described buzzer or speaker. It can be controlled to output a message regarding the operating status or completion of administration by voice or sound.
- the dishwasher 1 detects the turbidity value of the wash water during the stroke (S10), determines the progress of the stroke in real time based on the detected turbidity value, and performs the stroke based on this. It can be controlled to determine whether to complete (S20).
- Figure 10 shows the process of calculating the change rate of the turbidity value during the washing process and determining whether or not to proceed with the washing process based on the calculated change rate.
- control unit 100 opens the water supply valve 432 to start the washing process (S100) so that the washing water is supplied to the sump 41 through the water supply pipe 431. (S101)
- the control unit 100 starts measuring the washing time (Tw) from when the water supply valve 432 is opened through a timer. (S102)
- control unit 100 When the washing water pump 45 starts operating, the control unit 100 operates the detergent supply unit to supply detergent to the washing space 21 of the tub 20. (S104)
- step S104 may be omitted.
- the control unit 100 receives the output signal from the turbidity sensor 48, calls data for the conversion table from memory to convert the received output signal into a turbidity value, and uses the conversion table.
- the output signal is converted into a turbidity value to detect the current turbidity value of the washing water.
- control unit 100 samples the detected turbidity values in a first cycle and stores the sampled turbidity values in memory. (S106)
- the first period may exemplarily be 1 second.
- control unit 100 retrieves the turbidity values sampled during the first time from the memory, calculates the retrieved turbidity values, and calculates the first turbidity average value (M1). (S107)
- the first turbidity average value (M1) calculated here may be stored in the memory, and the first time may be exemplarily 5 minutes.
- the control unit 100 samples the turbidity value of the washing water detected after calculating the first turbidity average value (M1) in a second cycle and stores the sampled turbidity values in memory. Save it to (S108)
- the second period may be 1 second, the same as the first period.
- control unit 100 retrieves the turbidity values sampled for a second time from the calculation of the first turbidity average value from the memory, calculates the recalled turbidity values, and calculates the second turbidity average value (M2). (S109)
- the second turbidity average value (M2) calculated here may be stored in the memory, and the second time may be 5 minutes, the same as the first time.
- the control unit 100 calculates the change rate (RM) of the second turbidity average value (M2) relative to the first turbidity average value (M1), and the calculated change rate (RM) is the reference change rate ( RMth) is exceeded. (S110)
- the rate of change (RM) can be calculated using the above-mentioned formula.
- the control unit 100 determines to stop the washing cycle by estimating that washing of the washing object has been completed, and the washing water pump 45 ) Stop the washing water pump (45) by stopping the power supply to the motor. (S112) Through this, the washing process (S100) can be ended.
- step S110 determines to continue the washing process by estimating that the washing of the washing object is not completed, The timer determines whether the currently elapsed cleaning time (Tw) exceeds the scheduled cleaning time (Tw_th).
- the purpose of comparing the cleaning time (Tw) and the scheduled cleaning time (Tw_th) in this way is to prevent excessive delay in the cleaning process in case an error or malfunction occurs in the turbidity sensor 48, etc. You can have it.
- the control unit 100 may proceed to the above-described step S112 and end the washing cycle (S100).
- control unit 100 may return to the above-described step S105 and repeat the subsequent steps to continue the washing process (S100). there is.
- Figure 11 shows a process of detecting a turbidity value during the unit rinsing process (S200) and determining whether to proceed with the unit rinsing process (S200) based on the detected turbidity value.
- the unit rinsing process (S200) in the illustrated embodiment may be performed only once, may be preset to be performed multiple times, or may have an operation mode selected by the user.
- the description will focus on the steps performed during the unit rinsing cycle (S200). In an operating mode in which the rinsing cycle (S200) is performed multiple times, the process shown in FIG. 11 may be repeatedly performed.
- control unit 100 opens the drain valve 442 so that the wash water that has completed the wash cycle can be drained to start the rinse cycle (S200). (S201)
- the control unit 100 opens the water supply valve 432 to replenish the washing water and supplies new water to the sump 41 through the water supply pipe 431. Ensure that washing water is supplied.
- the control unit 100 starts measuring the rinsing time (Tr) after the water supply valve 432 is opened through a timer. (S203)
- control unit 100 may operate the detergent supply unit to supply a rinse agent or rinse to the washing space 21 of the tub 20.
- the control unit 100 receives an output signal from the turbidity sensor 48, and retrieves data for the conversion table from memory to convert the received output signal into a turbidity value.
- the output signal is converted to a turbidity value using a conversion table to detect the current turbidity value of the washing water.
- control unit 100 samples the detected turbidity values in a third cycle and stores the sampled turbidity values in memory. (S206)
- the third period may exemplarily be 1 second.
- control unit 100 determines whether the sampled turbidity value exceeds the reference turbidity value. (S207)
- the reference turbidity value may be 100 NTU as described above.
- the control unit 100 determines to stop the rinsing cycle by estimating that rinsing of the washing object has been completed, and turns on the motor of the washing water pump 45. Stop the wash water pump by stopping the power supply to the machine. (S209) Through this, the rinsing cycle (S200) can be ended.
- the control unit 100 determines to continue the rinsing cycle by estimating that rinsing of the object to be washed is not completed, and determines the current turbidity value through a timer. Determine whether the elapsed rinse time (Tr) exceeds the scheduled rinse time (Tr_th). (S208)
- comparing the rinsing time (Tr) and the scheduled rinsing time (Tr_th) is similar to the washing cycle (S100) in case an error or malfunction occurs in the turbidity sensor (48).
- the purpose may be to prevent delay in striking.
- the control unit 100 may proceed to the above-described step S209 and end the rinse cycle (S200).
- control unit 100 may return to the above-described step S204 and repeat the subsequent steps to allow the rinsing cycle (S200) to continue. there is.
Landscapes
- Washing And Drying Of Tableware (AREA)
Abstract
Description
Claims (15)
- 세척공간을 형성하는 터브;상기 터브의 하측에 배치되고, 상기 터브에 공급될 세척수가 저장되는 섬프;상기 세척수를 가압하여 상기 세척공간으로 공급하는 세척수펌프;상기 세척수의 탁도값을 감지하는 탁도센서; 및상기 탁도센서 및 상기 세척수펌프와 전기적을 연결되는 제어부;를 포함하고,상기 제어부는,행정 진행 중에 상기 탁도센서를 통해 상기 세척수의 탁도값을 검출하고, 상기 검출된 탁도값을 기초로 하여 상기 행정의 진행 여부를 결정하는 단계;를 수행하는 식기세척기.
- 제1 항에서,상기 행정의 진행 여부를 결정하는 단계는,세척행정의 진행 중에 상기 탁도값의 변화율을 산출하고, 상기 산출된 변화율을 기준으로 상기 세척행정의 진행 여부를 결정하는 단계;를 포함하는 식기세척기.
- 제2 항에서,상기 세척행정의 진행 여부를 결정하는 단계는,상기 세척수펌프의 작동이 개시된 후에, 상기 탁도센서로부터 출력신호를 수신하여 상기 세척수의 탁도값을 검출하는 단계;검출된 세척수의 탁도값에 대해서 제1 주기로 샘플링하고, 상기 샘플링된 탁도값들을 저장하는 단계;제1 시간동안 샘플링되어 저장된 탁도값들의 평균값을 연산하여 제1 탁도 평균값을 산출하는 단계;상기 제1 탁도 평균값을 산출한 이후로부터 검출되는 세척수의 탁도값에 대해서 제2 주기로 샘플링하고, 상기 샘플링된 탁도값들을 저장하는 단계;상기 제1 탁도 평균값을 산출한 이후로부터 제2 시간동안 샘플링된 탁도값들의 평균값을 연산하여 제2 탁도 평균값을 산출하는 단계; 및상기 제1 탁도 평균값 대비 상기 제2 탁도 평균값의 변화율을 연산하고, 연산된 변화율이 기준 변화율을 초과하는지 여부를 판단하는 단계;를 포함하는 식기세척기.
- 제3 항에서,상기 제어부는,상기 연산된 변화율이 기준 변화율보다 더 작거나 같은 것으로 판단되면, 상기 세척행정의 중지를 결정하는 단계를 더 수행하는 식기세척기.
- 제4 항에서,상기 제어부는,상기 세척행정의 중지가 결정되면, 상기 세척수펌프의 작동을 정지시키는 단계를 더 수행하는 식기세척기.
- 제3 항에서,상기 제1 주기와 상기 제2 주기는 서로 동일하게 되는 식기세척기.
- 제6 항에서,상기 제1 주기와 상기 제2 주기는 1초가 되는 식기세척기.
- 제3 항에서,상기 제1 시간과 상기 제2 시간은 서로 동일하게 되는 식기세척기.
- 제3 항에서,상기 기준 변화율은 10%가 되는 식기세척기.
- 제1 항에서,상기 행정의 진행 여부를 결정하는 단계는,헹굼행정의 진행 중에 측정된 탁도값을 기준으로 상기 헹굼행정의 진행 여부를 결정하는 단계;를 포함하는 식기세척기.
- 제10 항에서,상기 헹굼행정의 진행 여부를 결정하는 단계는,상기 탁도센서로부터 출력신호를 수신하여 상기 세척수의 탁도값을 검출하는 단계;검출된 세척수의 탁도값에 대해서 제3 주기로 샘플링하고, 샘플링된 탁도값들을 저장하는 단계; 및상기 샘플링된 탁도값이 기준 탁도값을 초과하는지 여부를 판단하는 단계;를 포함하는 식기세척기.
- 제11 항에서,상기 제어부는,상기 샘플링된 탁도값이 상기 기준 탁도값보다 더 작은 것으로 판단되면, 상기 헹굼행정의 중지를 결정하는 단계를 수행하는 식기세척기.
- 제12 항에서,상기 제어부는,상기 헹굼행정의 중지가 결정되면, 상기 세척수펌프의 작동을 정지시키는 단계를 더 수행하는 식기세척기.
- 제11 항에서,상기 제3 주기는 1초가 되는 식기세척기.
- 제11 항에서,상기 기준 탁도값은 100 NTU가 되는 식기세척기.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19/104,024 US20260076524A1 (en) | 2022-08-16 | 2023-07-18 | Dishwasher |
| EP23855055.2A EP4566507A4 (en) | 2022-08-16 | 2023-07-18 | Dishwasher |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020220101902A KR20240023786A (ko) | 2022-08-16 | 2022-08-16 | 식기세척기 |
| KR10-2022-0101902 | 2022-08-16 |
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| Publication Number | Publication Date |
|---|---|
| WO2024039084A1 true WO2024039084A1 (ko) | 2024-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2023/010330 Ceased WO2024039084A1 (ko) | 2022-08-16 | 2023-07-18 | 식기세척기 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20260076524A1 (ko) |
| EP (1) | EP4566507A4 (ko) |
| KR (1) | KR20240023786A (ko) |
| WO (1) | WO2024039084A1 (ko) |
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| KR20250169916A (ko) * | 2024-05-27 | 2025-12-04 | 삼성전자주식회사 | 식기 세척기 및 그 제어방법 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20080050838A (ko) * | 2006-12-04 | 2008-06-10 | 삼성전자주식회사 | 식기세척기의 세척제어방법 |
| KR20080051369A (ko) * | 2006-12-05 | 2008-06-11 | 삼성전자주식회사 | 식기세척기의 세척제어장치 및 그 방법 |
| EP2175766A1 (en) | 2007-07-02 | 2010-04-21 | Arçelik Anonim Sirketi | A dishwasher |
| JP2011010798A (ja) * | 2009-07-01 | 2011-01-20 | Panasonic Corp | 食器洗い機 |
| KR101174533B1 (ko) * | 2005-10-12 | 2012-08-16 | 엘지전자 주식회사 | 식기 세척기 및 그 제어 방법 |
| CN209331974U (zh) * | 2018-08-06 | 2019-09-03 | 华帝股份有限公司 | 一种洗碗机的自动洗涤控制装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5560060A (en) * | 1995-01-10 | 1996-10-01 | General Electric Company | System and method for adjusting the operating cycle of a cleaning appliance |
| DE10253025B3 (de) * | 2002-11-14 | 2004-07-22 | Whirlpool Corp., Benton Harbor | Verfahren zum Betreiben einer Geschirrspülmaschine mit zentraler Steuereinheit und Trübungsmessung |
| US7371288B2 (en) * | 2003-07-03 | 2008-05-13 | Lg Electronics Inc. | Dishwasher and method for controlling the same |
| US8506725B2 (en) * | 2008-02-15 | 2013-08-13 | Electrolux Home Products, Inc. | Washing appliance and associated method |
| KR102175766B1 (ko) | 2019-11-14 | 2020-11-06 | (주)대한지오이엔씨 | 낙석방지 울타리용 충격 에너지 감쇄장치 |
-
2022
- 2022-08-16 KR KR1020220101902A patent/KR20240023786A/ko active Pending
-
2023
- 2023-07-18 WO PCT/KR2023/010330 patent/WO2024039084A1/ko not_active Ceased
- 2023-07-18 EP EP23855055.2A patent/EP4566507A4/en active Pending
- 2023-07-18 US US19/104,024 patent/US20260076524A1/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101174533B1 (ko) * | 2005-10-12 | 2012-08-16 | 엘지전자 주식회사 | 식기 세척기 및 그 제어 방법 |
| KR20080050838A (ko) * | 2006-12-04 | 2008-06-10 | 삼성전자주식회사 | 식기세척기의 세척제어방법 |
| KR20080051369A (ko) * | 2006-12-05 | 2008-06-11 | 삼성전자주식회사 | 식기세척기의 세척제어장치 및 그 방법 |
| EP2175766A1 (en) | 2007-07-02 | 2010-04-21 | Arçelik Anonim Sirketi | A dishwasher |
| JP2011010798A (ja) * | 2009-07-01 | 2011-01-20 | Panasonic Corp | 食器洗い機 |
| CN209331974U (zh) * | 2018-08-06 | 2019-09-03 | 华帝股份有限公司 | 一种洗碗机的自动洗涤控制装置 |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20240023786A (ko) | 2024-02-23 |
| US20260076524A1 (en) | 2026-03-19 |
| EP4566507A4 (en) | 2025-12-24 |
| EP4566507A1 (en) | 2025-06-11 |
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